A detection device and an applied power module device and LED lamp

Abstract

An LED straight tube lamp includes an installation detection module for receiving an external driving signal. The installation detection module is used to determine whether the LED straight tube lamp is correctly installed on the lamp holder based on detecting a signal from the external driving signal during one or more pulse signals. The installation detection module includes a switch circuit coupled to a pulse generating module, wherein the one or more pulse signals turn on or off the switch circuit. The installation detection module is further used to maintain the switch circuit in an off state to disconnect the power supply circuit of the LED straight tube lamp when it is detected that the LED straight tube lamp is not correctly installed during the one or more pulse signals; and to maintain the switch circuit in an off state to disconnect the power supply circuit of the LED straight tube lamp when it is detected that the LED straight tube lamp is correctly installed during the one or more pulse signals.

Description

[0001] This utility model application is a divisional application submitted to the China Patent Office on December 7, 2016, with application number 201611116966.7 and invention name “A LED straight tube lamp”. Technical Field

[0002] The present invention relates to the field of lighting fixtures, and in particular to an LED straight tube lamp. Background Art

[0003] LED lighting technology is rapidly developing and replacing traditional incandescent and fluorescent lamps. Compared with fluorescent lamps filled with inert gas and mercury, LED straight tube lamps do not need to be filled with mercury. Therefore, it is no surprise that LED straight tube lamps have gradually become a highly anticipated lighting option in various lighting systems for home or workplaces dominated by lighting options such as traditional fluorescent bulbs and tubes. The advantages of LED straight tube lamps include improved durability and lifespan as well as lower energy consumption. Therefore, considering all factors, LED straight tube lamps will become more and more widely used.

[0004] The known LED straight tube lamp generally includes a lamp tube, a circuit board with a light source disposed in the lamp tube, and lamp holders disposed at both ends of the lamp tube. The lamp holders are provided with a power source, and the light source and the power source are electrically connected through the circuit board. However, there are several problems to be solved in the manufacture and application of existing LED straight tube lamps, such as

[0005] 1: Circuit boards are generally rigid boards. When the lamp tube is broken, especially when it is partially broken, the entire LED straight tube lamp is still in a straight tube state. Users may mistakenly believe that the lamp tube can still be used, and thus install it by themselves, which may easily lead to leakage and electric shock accidents. The applicant has proposed corresponding structural improvement methods in previous cases, such as CN105465640.

[0006] 2: The light source is set on the lamp board, and the lamp board and the power supply need to be physically connected so that the power supply can stably provide driving power for the light source. When connecting, it is necessary to comprehensively consider the firmness of the connection, the convenience of manufacturing and processing, and the yield and quality stability of the product. The lamp board adopts a flexible circuit board, which usually uses a polyimide layer (Polyimide, PI) as a base layer. The base layer has the effect of protecting the circuit, but it is not easy to conduct heat. For example, the applicant has disclosed a solution of placing a flexible circuit board on the upper part of the power circuit board for welding in the previous case CN105472836A. When the power circuit board (the welding place is the flexible circuit board and the power circuit board from the top to the bottom) is welded, the flexible circuit board is placed on the predetermined pad of the power circuit board for manual or welding machine welding. When this method is carried out on the production line of an automated robot, it encounters some bottlenecks in yield.

[0007] 3: LED straight tube lamps are usually divided into two categories according to their application types. One is ballast replacement, which directly replaces the existing incandescent lamps and fluorescent lamps connected to the ballast. The other is ballast bypass type, which omits the ballast in the circuit, that is, the LED straight tube lamp is electrically connected to the mains. Because the driving signal required for the operation of LED straight tube lamps is a DC signal, while the power source for the driving signal of fluorescent lamps is a low-frequency, low-voltage AC signal from the mains or a high-frequency, high-voltage AC signal from an electronic ballast, and LED straight tube lamps are also used for emergency lighting, where the power source for emergency lighting is a battery or an emergency ballast with an energy storage unit. In this way, the voltage and frequency ranges of different driving signals vary greatly, and it is not possible to be compatible simply by rectifying them.

[0008] 4: The LED straight tube lamp is a ballast bypass type. When the double-end power supply (i.e., the power supply is electrically connected to the two ends of the LED straight tube lamp) is used, if one of the two ends of the LED straight tube lamp has been inserted into the lamp holder and the other end has not been inserted into the lamp holder, if the user touches the metal or conductive part of the LED straight tube lamp that is not inserted into the lamp holder, there may be a risk of electric shock. The applicant has proposed a corresponding solution to this problem in previous cases, such as CN205424492.

[0009] 5: When the LED straight tube lamp adopts dual-end power supply (for example, an 8-foot 42W LED straight tube lamp that can be powered by dual ends), a wire (called Line or Neutral) must be laid between the two ends of the lamp holder (at least one pin of each) along the lamp board (such as a flexible circuit board) inside the lamp tube to receive the external driving voltage. This wire Line is different from (1) the LED+ line and LED- line connected to the positive and negative poles of the LED unit in the lamp tube, and (2) the ground line (Ground). However, because this wire Line passes through the lamp board and is very close to the LED+ line, there is a parasitic capacitance (for example, about 200PF) between the two lines. Therefore, this wire Line is easily generated or affected by electromagnetic interference (EMI), resulting in poor power conduction.

[0010] In view of the above problems, the present invention and its embodiments are proposed below. Summary of the invention

[0011] Many embodiments of the "present invention" are briefly described herein. However, the term "present invention" is only used to describe certain embodiments disclosed in this specification (whether or not in the claims), rather than a complete description of all possible embodiments. Certain embodiments of the various features or aspects described below as "present invention" can be independently or combined in different ways to form an LED straight tube lamp or a portion thereof.

[0012] In order to solve the above problems and continue to improve CN106015996 submitted earlier by the applicant, the present invention proposes the following technical solutions:

[0013] The present application proposes an installation detection device, which is applied to an LED lamp including a power module, wherein the installation detection module comprises: an integrated circuit, comprising at least the following terminals:

[0014] The first installation detection terminal and the second installation detection terminal are used to connect between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module and the rectifier output end of the rectifier circuit in the power module to form a power supply circuit for the LED lamp; the first input terminal is used to connect to the node in the power module through the first resistor to obtain a driving voltage signal, and is used to connect one end of the first switch tube through the second resistor; and is used to connect one plate of the first capacitor and the cathode of the voltage-stabilizing diode; wherein the other end of the first switch tube, the other plate of the first capacitor and the anode of the voltage-stabilizing diode are grounded; the output terminal is used to connect the control end of the first switch tube through the third resistor; the second input terminal is used to connect to the connection point between the fourth resistor and the fifth resistor set between the driving voltage end of the power module and the first installation detection terminal; is used to be grounded through the second capacitor; and is used to be grounded through the sixth resistor; wherein the integrated circuit controls the first switch tube to be turned on / off through the output terminal based on the electrical signal provided by the first input terminal; and the integrated circuit turns on / off the first installation detection terminal and the second installation detection terminal based on the detection signal provided by the second input terminal.

[0015] In one embodiment of the present application, the first resistor, the second resistor, the third resistor, the voltage-stabilizing diode, the first capacitor, and the first switch tube constitute a pulse generation auxiliary circuit; the integrated circuit includes: a pulse generating unit, connected to the pulse generation auxiliary circuit through the first input terminal; the pulse generating unit generates a pulse signal using the voltage signal provided by the pulse generation auxiliary circuit.

[0016] In one embodiment of the present application, the fourth resistor and the fifth resistor, the second capacitor and the sixth resistor constitute a detection and determination auxiliary circuit; the integrated circuit includes: a detection unit, connected to the detection and determination auxiliary circuit through the second input terminal, and connected to the first switch tube through the output terminal; the detection unit outputs a detection result signal to the output terminal based on the detection result of the detection signal of the second input terminal; wherein the detection result signal is used to turn on or off the first switch tube.

[0017] In an embodiment of the present application, the output terminal outputs a pulse signal; wherein the pulse width of the pulse signal is between 10 μs and 1 ms.

[0018] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0019] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0020] In one embodiment of the present application, the integrated circuit also includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal generated based on the detection signal provided by the second input terminal, and outputting a control signal to the control end of the transistor based on a pulse signal formed by the on-off operation of the first switch tube and the detection result signal.

[0021] The present application proposes a power module device for an LED lamp, wherein the LED lamp receives an external AC signal through a pin, and is characterized in that the power module includes: a first diode and a second diode, which constitute a first bridge arm unit for receiving an AC signal from a first pin of the LED lamp; a third diode and a fourth diode, which constitute a second bridge arm unit for receiving an AC signal from a second pin of the LED lamp; and a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp; wherein the first bridge arm unit, the second bridge arm unit and the third bridge arm unit are all connected between the first rectifier output terminal and the second rectifier output terminal; a third capacitor, a fourth capacitor and a first inductor, wherein , one end of the third capacitor is respectively connected to the first rectifier output terminal and one end of the first inductor, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; the driving circuit includes: a controller, a second inductor, and a fifth capacitor; wherein the first switch terminal of the controller is connected to the line connected to the first filter output terminal, the second switch terminal of the controller is connected to one end of the second inductor, and the other end of the second inductor is connected between the second filter output terminal through the fifth capacitor; wherein the two ends of the fifth capacitor are coupled to the two drive output terminals of the power module device; wherein the LED lamp The pins, the first rectifier output terminal and the second rectifier output terminal, the first filter output terminal and the second filter output terminal, and the two drive output terminals connect the nodes of the power module device to the power supply circuit of the LED lamp; the power module device also includes an installation detection module, which includes an integrated circuit and a connected circuit structure, wherein the integrated circuit uses the nodes in the power module device to obtain a driving voltage signal; wherein the integrated circuit is connected to the power supply line between the second rectifier output terminal and the second filter output terminal through the first installation detection terminal and the second installation detection terminal; the first input terminal of the integrated circuit obtains the driving voltage signal through the first resistor, is connected to one end of the first switch tube through the second resistor, and is connected to the first A plate of a container and a cathode connected to a voltage-stabilizing diode; wherein the other end of the first switch tube, the other plate of the first capacitor and the anode of the voltage-stabilizing diode are grounded; the output terminal of the integrated circuit is connected to the control end of the first switch tube through a third resistor; the second input terminal of the integrated circuit obtains the driving voltage signal, and is connected to a connection point between a fourth resistor and a fifth resistor arranged between the first installation detection terminal, connected to a plate of the second capacitor, and connected to the first installation detection terminal through a diode and a sixth resistor; wherein the other plate of the second capacitor is connected to ground; wherein the anode of the diode is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded;Wherein, the integrated circuit controls the first switch tube to be turned on / off through the output terminal based on the electrical signal provided by the first input terminal; and the integrated circuit turns on / off the first installation detection terminal and the second installation detection terminal based on the detection signal provided by the second input terminal. ;

[0022] In one embodiment of the present application, any two of the first bridge arm, the second bridge arm and the third bridge arm rectify the external AC signal provided by the connected pin, and output the rectified signal through the first rectifier output terminal and the second rectifier output terminal.

[0023] In an embodiment of the present application, the filter circuit to which the third capacitor, the fourth capacitor and the first inductor belong filters the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

[0024] In one embodiment of the present application, the first resistor, the second resistor, the third resistor, the voltage-stabilizing diode, the first capacitor and the first switch tube constitute a pulse generation auxiliary circuit; the integrated circuit includes: a pulse generating unit, connected to the pulse generation auxiliary circuit through the first input terminal; the pulse generating unit generates a pulse signal using the voltage signal provided by the pulse generation auxiliary circuit.

[0025] In one embodiment of the present application, the fourth resistor and the fifth resistor, the diode, the second capacitor and the sixth resistor constitute a detection and determination auxiliary circuit; the integrated circuit includes: a detection unit, connected to the detection and determination auxiliary circuit through the second input terminal, and connected to the first switch tube through the output terminal; the detection unit outputs a detection result signal to the output terminal according to the detection result of the detection signal of the second input terminal; wherein the detection result signal is used to turn on or off the first switch tube. In one embodiment of the present application, the output terminal outputs a pulse signal; wherein the pulse width of the pulse signal is between 10μs and 1ms.

[0026] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0027] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0028] In one embodiment of the present application, the integrated circuit also includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal generated based on the detection signal provided by the second input terminal, and outputting a control signal to the control end of the transistor based on a pulse signal formed by the on-off operation of the first switch tube and the detection result signal.

[0029] In an embodiment of the present application, the sixth resistor is equivalent to two resistors connected in parallel.

[0030] In an embodiment of the present application, the integrated circuit further includes a detection terminal connected to a connection point between the sixth resistor and the anode of the diode.

[0031] The present application proposes an LED lamp, characterized in that it comprises: a power module device as described in any of the aforementioned embodiments; and an LED module, coupled to two driving output ends of the power module device, and emits light using a received driving signal.

[0032] The present application proposes an installation detection device, which is applied to an LED lamp including a power module, and is characterized in that the installation detection device includes: an integrated circuit, including at least the following terminals: a first installation detection terminal and a second installation detection terminal, which are used to be connected between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module to form a power supply circuit for the LED lamp; a first input terminal, which is used to be grounded through a first capacitor; a second input terminal, which is used to connect the first installation detection terminal through a first resistor; a power terminal, which is used to be connected to a node in the power module to obtain a driving voltage signal; a GND terminal, which is used to be grounded; wherein the integrated circuit detects a detection signal from the second input end based on the electrical signal from the first input terminal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0033] In one embodiment of the present application, the integrated circuit integrates a partial circuit structure in a pulse generating unit, and the pulse generating unit also includes the first capacitor; the pulse generating unit generates a pulse signal using a voltage signal provided by the first capacitor.

[0034] In an embodiment of the present application, the integrated circuit maintains the voltage level of the first capacitor between 10 μs and 1 ms through the first input terminal, and the result is represented by a pulse signal.

[0035] In an embodiment of the present application, the integrated circuit is characterized by a pulse signal when the time interval of a voltage level at the first input terminal is between 0.05 and 0.95 percent of a half cycle of the AC signal.

[0036] In one embodiment of the present application, the pulse generating unit also includes a first switching tube and a comparator; one input end of the comparator is connected to the first capacitor through a first input terminal, the other input end receives a reference signal, and the output end outputs a pulse signal; wherein the output end of the comparator is also connected to the control end of the first switching tube; the two ends of the first switching tube are connected to the line between the first input terminal and the second installation detection terminal.

[0037] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0038] In one embodiment of the present application, the integrated circuit integrates a partial circuit structure in a detection and determination circuit; the first resistor belongs to the detection and determination circuit; the detection and determination circuit is connected to the switching circuit; the detection and determination circuit detects the detection signal provided by the second input terminal and outputs a detection result signal.

[0039] In one embodiment of the present application, the integrated circuit further includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal, and outputting a control signal to the control end of the transistor based on the pulse signal and the detection result signal.

[0040] In one embodiment of the present application, the pulse generating unit also includes a first switch tube and a Schmitt trigger; the two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; the control end of the first switch tube is connected to the detection result latch unit.

[0041] The present application proposes a power module device for an LED lamp, wherein the LED lamp receives an external AC signal through a pin, and is characterized in that the power module device includes: a first diode and a second diode, which constitute a first bridge arm for receiving an AC signal of a first pin in the LED lamp; a full-bridge rectifier circuit, which receives AC signals of a second pin and a third pin in the LED lamp; wherein the first bridge arm and the full-bridge rectifier circuit are both connected between a first rectifier output terminal and a second rectifier output terminal; a third capacitor, a fourth capacitor and a first inductor, wherein one end of the third capacitor is respectively connected to the first rectifier output terminal and one end of the first inductor, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; a driving circuit, comprising: a controller, a second inductor, and a fifth capacitor; wherein the first switch terminal of the controller is connected to the circuit connected to the first filter output terminal, the second switch terminal of the controller is connected to one end of the second inductor, and the other end of the second inductor is connected between the second filter output terminal through the fifth capacitor; wherein, The two ends of the fifth capacitor are coupled to the two driving output ends of the power module device; wherein, the pins of the LED lamp, the first rectifier output end and the second rectifier output end, the first filter output end and the second filter output end, and the two driving output ends connect the nodes of the power module device to the power supply circuit of the LED lamp; the power module device also includes an installation detection module, which includes an integrated circuit and a connected circuit structure; wherein the integrated circuit uses the nodes in the power module device to obtain a driving voltage signal; wherein the first installation detection terminal and the second installation detection terminal of the integrated circuit are connected to the power supply line between the second filter output end and the second rectifier output end; the first input terminal of the integrated circuit is grounded through the first capacitor; the second input terminal of the integrated circuit is connected to the first installation detection terminal through the first resistor; the power terminal of the integrated circuit is connected to the node in the power module to obtain a driving voltage signal; wherein the integrated circuit detects the detection signal from the second input end based on the electrical signal from the first input terminal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0042] In one embodiment of the present application, the full-bridge rectifier circuit includes: a third diode and a fourth diode, which constitute a second bridge arm for receiving an AC signal from a second pin of the LED lamp; and a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp.

[0043] In one embodiment of the present application, any two of the first bridge arm, the second bridge arm and the third bridge arm rectify the external AC signal provided by the connected pin, and output the rectified signal through the first rectifier output terminal and the second rectifier output terminal.

[0044] In one embodiment of the present application, the third capacitor, the fourth capacitor and the first inductor constitute a filter circuit, and the filter circuit filters the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

[0045] In one embodiment of the present application, the integrated circuit integrates a partial circuit structure in a pulse generating unit, and the pulse generating unit also includes the first capacitor; the pulse generating unit generates a pulse signal using a voltage signal provided by the first capacitor.

[0046] In one embodiment of the present application, the integrated circuit maintains the voltage level of the first capacitor between 10μs and 1ms through the first input terminal, and the result is characterized by a pulse signal.

[0047] In an embodiment of the present application, the integrated circuit is characterized by a pulse signal when the first input terminal is at a voltage level with a time interval between 0.05 and 0.95 percent of a half cycle of the AC signal.

[0048] In one embodiment of the present application, it is characterized in that the pulse generating unit also includes a first switching tube and a comparator; one input end of the comparator is connected to the first capacitor through a first input terminal, the other input end receives a reference signal, and the output end outputs a pulse signal; wherein the output end of the comparator is also connected to the control end of the first switching tube; the two ends of the first switching tube are connected to the line between the first input terminal and the second installation detection terminal.

[0049] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0050] In one embodiment of the present application, the integrated circuit integrates a partial circuit structure in a detection and determination circuit; the first resistor belongs to the detection and determination circuit; the detection and determination circuit is connected to the transistor; the detection and determination circuit detects the detection signal provided by the second input terminal and outputs a detection result signal.

[0051] In one embodiment of the present application, the integrated circuit further includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal, and outputting a control signal to the control end of the transistor based on the pulse signal and the detection result signal.

[0052] In one embodiment of the present application, the pulse generating unit also includes a first switch tube and a Schmitt trigger; the two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; the control end of the first switch tube is connected to the detection result latch unit.

[0053] In an embodiment of the present application, the first resistor is equivalent to two resistors connected in parallel.

[0054] The present application proposes an LED lamp, characterized in that it comprises: a power module device as described in any of the aforementioned embodiments; and an LED module, coupled to two driving output ends of the power module device, and emits light using a received driving signal.

[0055] The present application proposes an installation detection device, which is applied to an LED lamp including a power module, and is characterized in that the installation detection device includes: an integrated circuit, including at least the following terminals: a first installation detection terminal and a second installation detection terminal, which are used to be connected between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module to form a power supply circuit for the LED lamp; a first input terminal, which is used to be grounded through a first capacitor; a second input terminal, which is used to connect the first installation detection terminal through a first resistor; a power terminal, which is used to be connected to a node in the power module to obtain a driving voltage signal; a GND terminal, which is used to be grounded; wherein the integrated circuit is integrated with a pulse generating unit, which uses the first input terminal and the GND terminal to control the voltage of the first capacitor to generate a pulse signal; and the integrated circuit is also integrated with a detection and determination circuit, which detects the detection signal of the second input terminal based on the pulse signal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0056] In an embodiment of the present application, the pulse width of the pulse signal is between 10 μs and 1 ms.

[0057] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0058] In one embodiment of the present application, the pulse generating unit also includes a first switching tube and a comparator; one input end of the comparator is connected to the first capacitor through a first input terminal, the other input end receives a reference signal, and the output end outputs a pulse signal; wherein the output end of the comparator is also connected to the control end of the first switching tube; the two ends of the first switching tube are connected to the line between the first input terminal and the first installation detection terminal.

[0059] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0060] In an embodiment of the present application, the detection and determination circuit is connected to the transistor; the detection and determination circuit detects a detection signal provided by the second input terminal and outputs a detection result signal.

[0061] In one embodiment of the present application, the integrated circuit further includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal, and outputting a control signal to the control end of the transistor based on the pulse signal and the detection result signal.

[0062] In one embodiment of the present application, the pulse generating unit also includes a first switch tube and a Schmitt trigger; the two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; the control end of the first switch tube is connected to the detection result latch unit.

[0063] The present application provides a power module device for an LED lamp, wherein the LED lamp receives an external AC signal through a pin, and is characterized in that the power module device includes: a first diode and a second diode, which constitute a first bridge arm for receiving an AC signal of a first pin in the LED lamp; a full-bridge rectifier circuit, which receives AC signals of a second pin and a third pin in the LED lamp; wherein the first bridge arm and the full-bridge rectifier circuit are both connected between a first rectifier output terminal and a second rectifier output terminal; a third capacitor, a fourth capacitor and a first inductor, wherein one end of the third capacitor is respectively connected to the first rectifier output terminal and one end of the first inductor, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; a driving circuit, comprising: a controller, a second inductor, and a fifth capacitor; wherein a first switch terminal of the controller is connected to a circuit connected to the first filter output terminal, a second switch terminal of the controller is connected to one end of the second inductor, and the other end of the second inductor is connected between the second filter output terminal through the fifth capacitor; wherein both ends of the fifth capacitor are coupled to two drive output terminals of the power module device. output terminal; wherein the pin of the LED lamp, the first rectifier output terminal and the second rectifier output terminal, the first filter output terminal and the second filter output terminal, and the two drive output terminals connect the nodes of the power module device to the power supply circuit of the LED lamp; the power module device also includes an installation detection module, which includes an integrated circuit and a connected circuit structure; wherein the integrated circuit uses the nodes in the power module device to obtain a driving voltage signal; wherein the first installation detection terminal and the second installation detection terminal of the integrated circuit are connected to the power supply line between the second rectifier output terminal and the second filter output terminal; the first input terminal of the integrated circuit is grounded through a first capacitor; the second input terminal of the integrated circuit is connected to the first installation detection terminal through a first resistor; the power terminal of the integrated circuit is connected to the node in the power module to obtain a driving voltage signal; wherein the integrated circuit is integrated with a pulse generating unit, and the voltage of the first capacitor is controlled by the first input terminal and the GND terminal to generate a pulse signal; and the integrated circuit is also integrated with a detection and determination circuit, which detects the detection signal of the second input terminal based on the pulse signal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0064] In one embodiment of the present application, the full-bridge rectifier circuit includes: a third diode and a fourth diode, which constitute a second bridge arm for receiving an AC signal from a second pin of the LED lamp; and a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp.

[0065] In one embodiment of the present application, any two of the first bridge arm, the second bridge arm and the third bridge arm rectify the external AC signal provided by the connected pin, and output the rectified signal through the first rectifier output terminal and the second rectifier output terminal.

[0066] In one embodiment of the present application, the third capacitor, the fourth capacitor and the first inductor constitute a filter circuit, and the filter circuit filters the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

[0067] In one embodiment of the present application, the integrated circuit integrates a partial circuit structure in a pulse generating unit, and the pulse generating unit also includes the first capacitor; the pulse generating unit generates a pulse signal using a voltage signal provided by the first capacitor.

[0068] In an embodiment of the present application, the pulse width of the pulse signal is between 10 μs and 1 ms.

[0069] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0070] In one embodiment of the present application, it is characterized in that the pulse generating unit also includes a first switching tube and a comparator; one input end of the comparator is connected to the first capacitor through a first input terminal, the other input end receives a reference signal, and the output end outputs a pulse signal; wherein the output end of the comparator is also connected to the control end of the first switching tube; the two ends of the first switching tube are connected to the line between the first input terminal and the first installation detection terminal.

[0071] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0072] In an embodiment of the present application, the detection and determination circuit is connected to the transistor; the detection and determination circuit detects a detection signal provided by the second input terminal and outputs a detection result signal.

[0073] In one embodiment of the present application, the integrated circuit further includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal, and outputting a control signal to the control end of the transistor based on the pulse signal and the detection result signal.

[0074] In one embodiment of the present application, the pulse generating unit also includes a first switch tube and a Schmitt trigger; the two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; the control end of the first switch tube is connected to the detection result latch unit.

[0075] In an embodiment of the present application, the first resistor is equivalent to two resistors connected in parallel.

[0076] The present application proposes an LED lamp, characterized in that it comprises: a power module device as described in any of the aforementioned embodiments; and an LED module, coupled to two driving output ends of the power module device, and emits light using a received driving signal.

[0077] The present application proposes an installation detection device, which is applied to an LED lamp including a power module, and is characterized in that the installation detection device includes: an integrated circuit, including at least the following terminals: a first installation detection terminal and a second installation detection terminal, which are used to be connected between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module to form a power supply circuit for the LED lamp; a first input terminal and a GND terminal, which are used to connect the two ends of a first capacitor; wherein the first input terminal is also connected to a node in the power module to obtain a driving voltage signal; the second input terminal is used to be connected to a detection path circuit arranged between the power module and the GND terminal; wherein the integrated circuit detects the detection signal in the detection path circuit based on the electrical signal from the first input terminal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0078] In an embodiment of the present application, the integrated circuit maintains the voltage level of the first capacitor between 10 μs and 1 ms through the first input terminal, and the result is represented by a pulse signal.

[0079] In an embodiment of the present application, the integrated circuit is characterized by a pulse signal when the time interval of a voltage level at the first input terminal is between 0.05 and 0.95 percent of a half cycle of the AC signal.

[0080] In one embodiment of the present application, the integrated circuit also integrates a detection pulse generating module, which is connected to the first capacitor through the first input terminal to generate a pulse signal; the integrated circuit also integrates a first switch tube belonging to the detection path circuit; the first switch tube is connected between the second input terminal and the GND terminal, and is controlled to be turned on / off by the pulse signal.

[0081] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0082] In one embodiment of the present application, the integrated circuit integrates a detection determination circuit and a detection result latch circuit;

[0083] The detection determination circuit is coupled to the detection path circuit and is used to detect the electrical signal in the detection path circuit to generate a detection result signal;

[0084] The detection result latch circuit is coupled between the detection determination circuit and the control terminal of the switch circuit, and is used to control the on / off of the transistor based on the detection result signal.

[0085] In an embodiment of the present application, the detection path circuit includes a resistor connected to the second input terminal and a GND terminal.

[0086] The present application proposes a power module device for an LED lamp, wherein the LED lamp receives an external AC signal through a pin, and is characterized in that the power module device includes: a first diode and a second diode, which constitute a first bridge arm for receiving an AC signal from a first pin of the LED lamp; a third diode and a fourth diode, which constitute a second bridge arm for receiving an AC signal from a second pin of the LED lamp; a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp; and a seventh diode and an eighth diode, which constitute a fourth bridge arm for receiving an AC signal from a fourth pin of the LED lamp; wherein the first bridge arm and the second bridge arm constitute a full-wave rectifier circuit, and the third bridge arm and the fourth bridge arm constitute a full-wave rectifier circuit. The bridge arm constitutes a full-wave rectifier circuit, and the two full-wave rectifier circuits are connected between the first rectifier output terminal and the second rectifier output terminal; a third capacitor, a fourth capacitor and a first inductor, wherein one end of the third capacitor is respectively connected to the first rectifier output terminal and one end of the first inductor, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; a driving circuit, comprising: a controller, a second inductor, a fifth capacitor and a switch; wherein the control terminal of the controller is connected to the switch, one end of the switch is connected to one end of the second inductor, and the other end is connected to the second filter output terminal; wherein the other end of the second inductor is connected to the second filter output terminal through The fifth capacitor is connected between the first filter output terminal; wherein the two ends of the fifth capacitor are coupled to the two driving output terminals of the power module device; wherein the pins of the LED lamp, the first rectifier output terminal and the second rectifier output terminal, the first filter output terminal and the second filter output terminal, and the two driving output terminals connect the nodes of the power module device to the power supply circuit of the LED lamp; the power module device also includes an installation detection module, which includes an integrated circuit and a connected circuit structure; wherein the integrated circuit uses the nodes in the power module device to obtain a driving voltage signal; wherein the first installation detection terminal and the second installation detection terminal of the integrated circuit are connected to the rectifier output terminal of the rectifier circuit in the power module and the electrical The integrated circuit is connected between the filter output terminals of the filter circuit in the source module to form a power supply circuit for the LED lamp; the first input terminal and the GND terminal of the integrated circuit are connected to the two ends of the first capacitor; wherein the first input terminal is also connected to the node in the power module through the first resistor to obtain a driving voltage signal; the second input terminal of the integrated circuit is connected to a detection path circuit arranged between the node in the power module and the GND terminal; wherein the second input terminal is also connected to the node in the power module; wherein the integrated circuit detects the detection signal in the detection path circuit based on the electrical signal from the first input terminal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0087] In an embodiment of the present application, the integrated circuit maintains the voltage level of the first capacitor between 10 μs and 1 ms through the first input terminal, and the result is represented by a pulse signal.

[0088] In an embodiment of the present application, the integrated circuit is characterized by a pulse signal when the time interval of a voltage level at the first input terminal is between 0.05 and 0.95 percent of a half cycle of the AC signal.

[0089] In one embodiment of the present application, the integrated circuit also integrates a detection pulse generating module, which is connected to the first capacitor through the first input terminal and outputs a pulse signal; the integrated circuit also integrates a first switching tube connected between the second input terminal and the GND terminal, which is controlled to be turned on / off by the pulse signal.

[0090] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0091] In one embodiment of the present application, the integrated circuit integrates a detection and determination circuit and a detection result latch circuit; wherein the detection and determination circuit is coupled to the detection path circuit, and is used to detect the electrical signal in the detection path circuit to generate a detection result signal; the detection result latch circuit is coupled between the detection and determination circuit and the control end of the switch circuit, and is used to control the on / off of the switch circuit based on the detection result signal.

[0092] In an embodiment of the present application, the detection path circuit further includes a resistor connected to the second input terminal and the GND terminal.

[0093] In one embodiment of the present application, the third capacitor, the fourth capacitor and the first inductor constitute a filter circuit, and the filter circuit filters the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

[0094] The present application proposes an LED lamp, characterized in that it includes: a power module device as described in any one of claims 72-79; and an LED module, coupled to two driving output ends of the power module device, and emits light using the received driving signal.

[0095] The present application proposes an installation detection device, which is applied to an LED lamp including a power module, characterized in that the installation detection device comprises: an integrated circuit, comprising at least the following terminals: a first installation detection terminal and a second installation detection terminal, which are used to connect between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module to form a power supply circuit for the LED lamp; a first input terminal and a GND terminal, which are used to connect the two ends of a first capacitor; wherein the first input terminal is also connected to a node in the power module to obtain a driving voltage signal; the second input terminal is used to connect to a detection path circuit arranged between the power module and the GND terminal; wherein the integrated circuit is integrated with a detection pulse generation module, which controls the voltage of the first capacitor to generate a pulse signal by using the first input terminal and the GND terminal; and the integrated circuit is also integrated with a detection determination circuit, which detects the detection signal in the detection path circuit obtained by the second input terminal based on the pulse signal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

[0096] In an embodiment of the present application, the pulse width of the pulse signal is between 10 μs and 1 ms.

[0097] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0098] In one embodiment of the present application, the integrated circuit also integrates a first switch tube belonging to the detection path circuit; the first switch tube is connected between the second input terminal and the GND terminal, and is controlled to be turned on / off by the pulse signal.

[0099] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0100] In one embodiment of the present application, the integrated circuit also integrates a detection result latch circuit; the detection result latch circuit is coupled between the detection determination circuit and the control end of the transistor, and is used to control the on / off of the transistor based on the detection result signal output by the detection determination circuit.

[0101] In an embodiment of the present application, the detection path circuit includes a resistor connected to the second input terminal and a GND terminal.

[0102] The present application proposes a power module device for an LED lamp, wherein the LED lamp receives an external AC signal through a pin, and is characterized in that the power module device includes: a first diode and a second diode, which constitute a first bridge arm for receiving an AC signal from a first pin of the LED lamp; a third diode and a fourth diode, which constitute a second bridge arm for receiving an AC signal from a second pin of the LED lamp; a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp; and a seventh diode and an eighth diode, which constitute a fourth bridge arm for receiving an AC signal from a fourth pin of the LED lamp; wherein the first bridge arm and the second bridge arm constitute a full-wave rectifier circuit, and the third bridge arm constitutes a full-wave rectifier circuit. The first arm and the fourth bridge arm form a full-wave rectifier circuit, and the two full-wave rectifier circuits are connected between the first rectifier output terminal and the second rectifier output terminal; a third capacitor, a fourth capacitor and a first inductor, wherein one end of the third capacitor is connected to the first rectifier output terminal and one end of the first inductor respectively, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; a driving circuit, comprising: a controller, a second inductor, a fifth capacitor and a switch; wherein the control terminal of the controller is connected to the switch, one end of the switch is connected to one end of the second inductor, and the other end is connected to the second filter output terminal; wherein the second inductor The other end of the inductor is connected between the first filter output end through the fifth capacitor; wherein the two ends of the fifth capacitor are coupled to the two drive output ends of the power module device; wherein the pins of the LED lamp, the first rectifier output end and the second rectifier output end, the first filter output end and the second filter output end, and the two drive output ends connect the nodes of the power module device to the power supply circuit of the LED lamp; the power module device also includes an installation detection module, which includes an integrated circuit and a connected circuit structure; wherein the integrated circuit uses the nodes in the power module device to obtain a driving voltage signal; wherein the first installation detection terminal and the second installation detection terminal of the integrated circuit are connected to the integrated circuit in the power module The first input terminal and the GND terminal of the integrated circuit are connected to the two ends of the first capacitor; wherein the first input terminal is also connected to the node in the power module through the first resistor to obtain the driving voltage signal; the second input terminal of the integrated circuit is connected to a detection path circuit arranged between the node in the power module and the GND terminal; wherein the second input terminal is also connected to the node in the power module; wherein the integrated circuit is integrated with a detection pulse generating module, and the voltage of the first capacitor is controlled by using the first input terminal and the GND terminal to generate a pulse signal;The integrated circuit also integrates a detection determination circuit, which detects the detection signal in the detection path circuit obtained by the second input terminal based on the pulse signal, and turns on / off the first installation detection terminal and the second installation detection terminal based on the detection result. ;

[0103] In an embodiment of the present application, the pulse width of the pulse signal is between 10 μs and 1 ms.

[0104] In an embodiment of the present application, the time interval of the pulse signal is between 0.05 and 0.95 percent of a half period of the AC signal.

[0105] In one embodiment of the present application, the integrated circuit also integrates a detection pulse generating module, which is connected to the first capacitor through the first input terminal and outputs a pulse signal; the integrated circuit also integrates a first switching tube connected between the second input terminal and the GND terminal, which is controlled to be turned on / off by the pulse signal.

[0106] In an embodiment of the present application, a transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

[0107] In one embodiment of the present application, the integrated circuit also integrates a detection result latch circuit; wherein the detection result latch circuit is coupled between the detection determination circuit and the control end of the switch circuit, and is used to control the on / off of the switch circuit based on the detection result signal output by the detection determination circuit.

[0108] In an embodiment of the present application, the detection path circuit further includes a resistor connected to the second input terminal and the GND terminal.

[0109] In one embodiment of the present application, the third capacitor, the fourth capacitor and the first inductor constitute a filter circuit, and the filter circuit filters the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

[0110] The present application proposes an LED lamp, characterized in that it comprises: a power module device as described in any of the aforementioned embodiments; and an LED module, coupled to two driving output ends of the power module device, and emits light using a received driving signal.

[0111] The present invention has further effects of the above-mentioned non-conventional optional manner, which will be described below in conjunction with specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0112] Figure 1It is a planar cross-sectional view showing that the lamp board of the LED straight tube lamp according to the embodiment of the present invention is a flexible circuit board and its end passes through the transition part of the lamp tube and is welded to the output end of the power supply;

[0113] Figure 2 It is a planar cross-sectional view showing that the flexible circuit board of the LED straight tube lamp of the embodiment of the present invention has a double-layer structure;

[0114] Figure 3A It is a three-dimensional diagram showing a pad of a flexible circuit board of a lamp board of an LED straight tube lamp according to an embodiment of the present invention, which is used for welding and connecting with a printed circuit board of a power source;

[0115] Figure 3B A schematic diagram of a wire arranged along a lamp board between lamp caps at both ends of an LED straight tube lamp according to an embodiment of the present invention;

[0116] Figure 4A It is a partial schematic diagram of the welding structure of the lamp board and the power supply according to the embodiment of the present invention;

[0117] FIG. 4B to FIG. 4D is a schematic diagram of a welding process of a lamp panel and a power source according to an embodiment of the present invention;

[0118] Figure 5 It is a three-dimensional diagram showing that the flexible circuit board of the light board of the LED straight tube lamp according to the embodiment of the present invention and the printed circuit board of the power supply are combined into a circuit board assembly;

[0119] Figure 6 It is a stereogram showing Figure 5 Another configuration of the circuit board assembly;

[0120] Figure 7 is a three-dimensional diagram showing that in an embodiment of the present invention, the flexible circuit board of the light board has a double-layer circuit layer;

[0121] Fig. 8A It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0122] Figure 8B It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0123] Figure 8C It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0124] Fig.8D is a circuit block diagram of an LED lamp according to an embodiment of the present invention;

[0125] Fig. 8Eis a circuit block diagram of an LED lamp according to an embodiment of the present invention;

[0126] Figure 8F is a circuit block diagram of an LED lamp according to an embodiment of the present invention;

[0127] Figure 8G A circuit block diagram of the connection between an LED straight tube lamp and an external power supply according to a preferred embodiment;

[0128] Fig.9A is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0129] Fig. 9B is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0130] Fig. 9C is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0131] Fig.9D is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0132] Fig.9E is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0133] Fig.9F is a circuit schematic diagram of a rectifier circuit according to an embodiment of the present invention;

[0134] Fig. 10A is a circuit block diagram of a filter circuit according to an embodiment of the present invention;

[0135] Fig. 10B is a circuit diagram of a filter unit according to an embodiment of the present invention;

[0136] Fig. 10C is a circuit diagram of a filter unit according to an embodiment of the present invention;

[0137] Fig.11A A circuit diagram of an LED module according to an embodiment of the present invention;

[0138] Fig. 11B A circuit diagram of an LED module according to an embodiment of the present invention;

[0139] Fig. 11C A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0140] Fig.11D A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0141] Fig.11EA schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0142] Fig.11F A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0143] Fig.11G A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0144] Fig.11H A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0145] Fig.11I A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0146] Fig.11J A circuit diagram of a power pad according to an embodiment of the present invention;

[0147] Figure 11K A schematic diagram of wiring of an LED module according to an embodiment of the present invention;

[0148] Fig. 12A A schematic diagram of an application circuit block of a power module of an LED lamp according to an embodiment of the present invention;

[0149] Fig. 12B is a circuit block diagram of a driving circuit according to an embodiment of the present invention;

[0150] Fig. 12C is a circuit diagram of a driving circuit according to an embodiment of the present invention;

[0151] Fig.12D is a circuit diagram of a driving circuit according to an embodiment of the present invention;

[0152] Fig.12E is a circuit diagram of a driving circuit according to an embodiment of the present invention;

[0153] Fig.12F is a circuit diagram of a driving circuit according to an embodiment of the present invention;

[0154] Fig.13A It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0155] Fig. 13B is a circuit diagram of an overvoltage protection circuit according to an embodiment of the present invention;

[0156] Fig.14A It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0157] Fig. 14B It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0158] Fig. 14C A circuit diagram of an auxiliary power supply module according to an embodiment of the present invention;

[0159] Fig.14D It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0160] Fig.14E It is a schematic diagram of the configuration of the auxiliary power module in the LED straight tube lamp according to the embodiment of the present invention;

[0161] Fig.14F A schematic diagram of the configuration of an auxiliary power module in a lamp holder according to an embodiment of the present invention;

[0162] Figure 14G It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0163] Fig.15A It is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention;

[0164] Fig. 15B A circuit diagram of an installation detection module according to an embodiment of the present invention;

[0165] Fig. 15C is a circuit diagram of a detection pulse generating module according to an embodiment of the present invention;

[0166] Fig.15D is a circuit diagram of a detection and determination circuit according to an embodiment of the present invention;

[0167] Fig.15E is a circuit diagram of a detection result latch circuit according to an embodiment of the present invention;

[0168] Fig.15F is a circuit diagram of a switch circuit according to an embodiment of the present invention;

[0169] Figure 15G A circuit diagram of an installation detection module according to an embodiment of the present invention;

[0170] Fig.15H is a circuit diagram of a detection pulse generating module according to an embodiment of the present invention;

[0171] Fig.15I is a circuit diagram of a detection and determination circuit according to an embodiment of the present invention;

[0172] Fig.15J is a circuit diagram of a detection result latch circuit according to an embodiment of the present invention;

[0173] Figure 15K is a circuit diagram of a switch circuit according to an embodiment of the present invention;

[0174] Figure 15L A circuit diagram of an installation detection module according to an embodiment of the present invention;

[0175] Figure 15M is a schematic diagram of an internal circuit module of an integrated control module according to an embodiment of the present invention;

[0176] Fig.15N is a circuit diagram of a pulse generation auxiliary circuit according to an embodiment of the present invention;

[0177] Fig.15O A circuit diagram of a detection and determination auxiliary circuit according to an embodiment of the present invention;

[0178] Figure 15P is a circuit diagram of a switch circuit according to an embodiment of the present invention;

[0179] Figure 15Q A schematic diagram of an internal circuit module of a three-terminal switch device according to an embodiment of the present invention;

[0180] Figure 15R is a circuit diagram of a signal processing unit according to an embodiment of the present invention;

[0181] Figure 15S is a circuit diagram of a signal generating unit according to an embodiment of the present invention;

[0182] Figure 15T A circuit diagram of a signal acquisition unit according to an embodiment of the present invention;

[0183] Figure 15U is a circuit diagram of a switch unit according to an embodiment of the present invention; and

[0184] Figure 15V is a circuit diagram of an internal power detection unit according to an embodiment of the present invention;

[0185] Figure 15W A circuit diagram of an installation detection module according to an embodiment of the present invention; and

[0186] Figure 15X FIG. 4 is a circuit diagram of a detection path circuit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0187] Based on the glass lamp tube, the present invention proposes a new LED straight tube lamp to solve the problems mentioned in the background technology and the above-mentioned problems. In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following descriptions of the various embodiments of the present invention are for illustration only and are not intended to be all embodiments of the present invention or to limit the present invention to specific embodiments.

[0188] In addition, it should be noted that in order to clearly illustrate the various inventive features of the present disclosure, this article describes each embodiment in the form of multiple embodiments as follows. However, it does not mean that each embodiment can only be implemented alone. A technician familiar with the field can design feasible implementation examples together according to their needs, or replace the replaceable components / modules in different embodiments according to design requirements. In other words, the implementation method taught in this case is not limited to the state described in the following embodiments, but also includes the replacement and arrangement and combination of various embodiments / components / modules when feasible, which is described in advance.

[0189] Although the applicant has proposed an improvement method of reducing leakage accidents by using a flexible circuit board in previous cases, such as CN105465640A, some embodiments can be combined with the circuit method of the present application to achieve more significant effects.

[0190] Please refer to Figure 2 The flexible circuit board as the light board 2 includes a circuit layer 2a with a conductive effect. The light source 202 is arranged on the circuit layer 2a and is electrically connected to the power source through the circuit layer 2a. In this specification, the circuit layer with a conductive effect can also be called a conductive layer. Figure 2 In this embodiment, the flexible circuit board may further include a dielectric layer 2b, which is stacked with the circuit layer 2a. The area of ​​the dielectric layer 2b is equal to or slightly smaller than that of the circuit layer 2a. The circuit layer 2a is used to set the light source 202 on the surface opposite to the dielectric layer 2b. The circuit layer 2a is electrically connected to the power source 5 (see Figure 1 ) for passing direct current. The dielectric layer 2b is bonded to the inner circumference of the lamp tube 1 by adhesive 4 on the surface opposite to the circuit layer 2a. The circuit layer 2a may be a metal layer or a power layer with wires (such as copper wires).

[0191] In other embodiments, the outer surfaces of the circuit layer 2a and the dielectric layer 2b can each be coated with a circuit protection layer, and the circuit protection layer can be an ink material with the functions of solder resistance and increased reflection. Alternatively, the flexible circuit board can be a one-layer structure, that is, it is composed of only one circuit layer 2a, and then a circuit protection layer of the above-mentioned ink material is coated on the surface of the circuit layer 2a, and an opening can be provided on the protection layer so that the light source can be electrically connected to the circuit layer. Whether it is a one-layer circuit layer 2a structure or a two-layer structure (a circuit layer 2a and a dielectric layer 2b), it can be equipped with a circuit protection layer. The circuit protection layer can also be provided on one side of the flexible circuit board, for example, the circuit protection layer is only provided on one side with the light source 202. It should be noted that the flexible circuit board is a single-layer circuit layer structure 2a or a two-layer structure (a single-layer circuit layer 2a and a single-layer dielectric layer 2b), which is significantly more flexible and bendable than a general three-layer flexible substrate (a single-layer dielectric layer sandwiched between two-layer circuit layers). Therefore, it can be used with a lamp tube 1 having a special shape (for example, a non-straight tube lamp) and the flexible circuit board can be placed close to the wall of the lamp tube 1. In addition, it is a better configuration for the flexible circuit board to be close to the wall of the lamp tube, and the fewer the number of layers of the flexible circuit board, the better the heat dissipation effect, and the lower the material cost, the more environmentally friendly it is, and the flexibility effect can also be improved.

[0192] Of course, the flexible circuit board of the present invention is not limited to a single-layer or double-layer circuit board. In other embodiments, the flexible circuit board includes multiple circuit layers 2a and multiple dielectric layers 2b. The dielectric layers 2b and the circuit layers 2a are stacked in sequence and arranged on the side of the circuit layer 2a opposite to the light source 202. The light source 202 is arranged on the top layer of the multiple circuit layers 2a and is electrically connected to the power source through the top layer of the circuit layer 2a. In other embodiments, the axial projection length of the flexible circuit board as the light board 2 is greater than the length of the lamp tube.

[0193] See also Figure 7 In one embodiment, the flexible circuit board serving as the lamp board 2 includes, from top to bottom, a first circuit layer 2a, a dielectric layer 2b and a second circuit layer 2c, the thickness of the second circuit layer 2c is greater than the thickness of the first circuit layer 2a, the axial projection length of the lamp board 2 is greater than the length of the lamp tube 1, wherein the lamp board 2 is not provided with a light source 202 and protrudes from the end area of ​​the lamp tube 1, the first circuit layer 2a and the second circuit layer 2c are electrically connected through two through holes 203 and 204 respectively, but the through holes 203 and 204 are not connected to each other to avoid a short circuit.

[0194] In this way, since the second circuit layer 2c is thicker, it can support the first circuit layer 2a and the dielectric layer 2b, and at the same time, it is not easy for the light board 2 to be offset or deformed when attached to the inner tube wall of the lamp tube 1, so as to improve the manufacturing yield. In addition, the first circuit layer 2a and the second circuit layer 2c are electrically connected, so that the circuit layout on the first circuit layer 2a can be extended to the second circuit layer 2c, making the circuit layout on the light board 2 more diverse. Furthermore, the original circuit layout routing is changed from a single layer to a double layer, and the single layer area of ​​the circuit layer on the light board 2, that is, the size in the width direction, can be further reduced, so that the number of light boards for batch mounting of light sources 202 can be increased, thereby improving productivity.

[0195] Furthermore, the light board 2 is provided with a light source 202, and the first circuit layer 2a and the second circuit layer 2c protruding from the end area of ​​the lamp tube 1 can also be directly used to realize the circuit layout of the power module, so that the power module can be directly configured on the flexible circuit board.

[0196] If the two ends of the lamp board 2 along the axial direction of the lamp tube 1 are not fixed to the inner circumference of the lamp tube 1, if wires are used for connection, the two ends are free and are prone to shaking during the subsequent moving process, which may cause the wires to break. Therefore, welding is the preferred method for connecting the lamp board 2 and the power source 5. Specifically, refer to Figure 1 The lamp board 2 can be directly climbed over the transition zone 103 of the reinforcement structure and then welded to the output end of the power supply 5, eliminating the use of wires and improving the stability of the product.

[0197] like Figure 3A As shown, the specific method can be to leave a power pad a at the output end of the power supply 5, and leave tin on the power pad a so that the thickness of the tin on the pad is increased to facilitate welding. Correspondingly, a light source pad b is also left at the end of the lamp board 2, and the power pad a at the output end of the power supply 5 is welded together with the light source pad b of the lamp board 2. If the plane where the pad is located is defined as the front side, the connection between the lamp board 2 and the power supply 5 is most stable when the pads on the front sides of the two are connected. However, during welding, the welding pressure head is typically pressed on the back side of the lamp board 2, and the solder is heated through the lamp board 2, which is more likely to cause reliability problems. If in some embodiments, a hole is opened in the middle of the light source pad b on the front side of the lamp board 2, and then it is welded with the front side facing up on the power pad a on the front side of the power supply 5, the welding pressure head can directly heat and melt the solder, which is easier to achieve in practical operation.

[0198] like Figure 3A As shown in the above embodiment, the flexible circuit board as the lamp board 2 is mostly fixed on the inner circumference of the lamp tube 1, and only at the two ends is it not fixed on the lamp tube 1 (see Figure 7) on the inner circumference of the lamp tube 1, the lamp board 2 which is not fixed on the inner circumference of the lamp tube 1 forms a free portion 21 (see Figure 1 and 7 ), and the lamp board 2 is fixed on the inner circumference of the lamp tube 1. The free portion 21 has the above-mentioned soldering pad b. During assembly, the end of the free portion 21 and the power source 5 that is soldered will drive the free portion 21 to shrink inside the lamp tube 1. It is worth noting that when the flexible circuit board used as the lamp board 2 is Figure 7 In the structure shown as having two circuit layers 2a and 2c sandwiching a dielectric layer 2b, the aforementioned lamp board 2 is not provided with a light source 202 and the end area protruding from the lamp tube 1 can be used as a free portion 21, allowing the free portion 21 to achieve connectivity between the two circuit layers and the circuit layout of the power module.

[0199] In addition, in the pin design of LED straight tube lamps, it can be a structure with single pins at both ends (two pins in total) or double pins at both ends (four pins in total). Therefore, in the case of power input from both ends of the LED straight tube lamp, at least one pin at each end can be used to receive external driving signals. The wires set between the pins at each end are typically called Line or Neutral wires, and can be used for signal input and transmission. Figure 3B The figure is a schematic diagram of the wires arranged along the lamp board (such as a flexible circuit board) between the lamp caps at both ends of the LED straight tube lamp according to one embodiment. Figure 3B The LED straight tube lamp disclosed in the present invention may include a lamp tube, a lamp holder (not shown in FIG. Figure 3B ), lamp board 2, short circuit board 253, and inductor 526. The two ends of the lamp tube each have at least one pin for receiving an external driving voltage. The lamp cap is arranged at the two ends of the lamp tube, and Figure 3B The short circuit board 253 (at least part of the electronic components) shown at the left and right ends of the lamp tube can be respectively in the lamp holders at the two ends. The lamp board 2 is arranged in the lamp tube and includes an LED module, and the LED module includes an LED unit 632. The short circuit board 253 is electrically connected to the lamp board 2, and this electrical connection (for example, through a solder pad) may include a first terminal (L) for connecting the at least one pin at the two ends of the lamp tube, a second (+ or LED+) and a third terminal (- or LED-) for connecting the positive and negative poles of the LED unit 632, respectively, and a fourth terminal (GND or ground) for connecting a reference potential. Optionally and typically, the reference potential is defined as the ground potential or the fourth terminal is for the purpose of grounding the power module of this LED straight tube lamp. The inductor 526 is connected in series between the fourth terminals of the short circuit board 253 at the two ends of the lamp tube. In an embodiment, the inductor 526 may include, for example, an I-shaped inductor (choke inductor or Dual-Inline-Package inductor).

[0200] More specifically, in the design of a double-ended straight tube lamp, part of the power circuit (e.g., about 21W) may be set in each of the two ends of the lamp holder, so it is necessary to set an extended wire L (input signal line) along the lamp board, and this wire L is very close to the wire LED+, so a parasitic capacitance will be generated between the two. The high-frequency interference passing through the wire LED+ will be reflected to the wire L through the parasitic capacitance, thereby generating a detectable EMI effect.

[0201] Therefore, in this embodiment, by configuring the inductor 526 to be connected in series between the fourth terminals of the short circuit board 253 at both ends of the lamp tube, the inductor 526 can block the signal loop of high-frequency interference through its high impedance characteristics at high frequencies, thereby eliminating the high-frequency interference on the wire LED+, thereby avoiding the EMI effect reflected by the parasitic capacitance on the wire L. In other words, the function of the inductor 526 is to eliminate or reduce the EMI caused by or affected by the aforementioned wire L (extending the lamp board 2 between the first terminals at both ends), thereby improving the quality of the power signal transmission in the lamp tube (including passing through the wire L, the wire LED+, and the wire LED-) and the LED lamp. Therefore, such an LED straight tube lamp with the inductor 526 effectively reduces the EMI effect of the wire L. Furthermore, such an LED straight tube lamp may also include an installation detection module (described below and see FIG. 15 ), wherein the installation detection module is used to detect the installation status of the LED straight tube lamp and a lamp holder.

[0202] Please refer to Figure 5 and Figure 6 In other embodiments, the lamp board 2 and the power supply 5 fixed by welding can be replaced by a circuit board assembly 25 equipped with a power supply module 250. The circuit board assembly 25 has a long circuit board 251 and a short circuit board 253. The long circuit board 251 and the short circuit board 253 are attached to each other and fixed by bonding. The short circuit board 253 is located near the periphery of the long circuit board 251. The short circuit board 253 has a power supply module 25, and the whole constitutes a power supply. The material of the short circuit board 253 is harder than the long circuit board 251, so as to achieve the function of supporting the power supply module 250.

[0203] The long circuit board 251 can be a flexible circuit board or a flexible substrate as the light board 2 mentioned above, and has Figure 2 The circuit layer 2a of the light board 2 and the power module 250 can be electrically connected in different ways according to the actual use. Figure 5 As shown, the power module 250 and the circuit layer 2a on the long circuit board 251 that is electrically connected to the power module 250 are both located on the same side of the short circuit board 253, and the power module 250 is directly electrically connected to the long circuit board 251. Figure 6As shown, the circuit layer 2a on the power module 250 and the long circuit board 251 that will be electrically connected to the power module 250 is respectively located on both sides of the short circuit board 253, and the power module 250 penetrates the short circuit board 253 and is electrically connected to the circuit layer 2a of the lamp board 2.

[0204] Please refer to FIG. 4A to FIG. 4D , FIG. 4A to FIG. 4D Schematic diagram of the connection structure and connection method between the lamp board 200 and the power supply circuit board 420 of the power supply 400. In this embodiment, the lamp board 200 and the free part have the same structure, and the free part is the part at the opposite ends of the lamp board 200 used to connect the power supply circuit board 420. After the part is connected to the power supply circuit board 420, a "Z-shaped (such as Figure 4A As shown, in other embodiments, the leaves are in an "S" shape), which can improve the risk of peeling off the solder joints caused by the free part of the lamp board at the welding point, improve the stability of welding, and avoid the risk of sparks. The lamp board 200 is a flexible circuit board, and the lamp board 200 includes a stacked circuit layer 200a and a circuit protection layer 200c. Among them, the side of the circuit layer 200a away from the circuit protection layer 200c is defined as the first side 2001, and the side of the circuit protection layer 200c away from the circuit layer 200a is defined as the second side 2002, that is, the first side 2001 and the second side 2002 are two opposite sides of the lamp board 200. A plurality of LED light sources 202 are arranged on the first side 2001 and are electrically connected to the circuit layer 200a. The circuit protection layer 200c is a polyimide layer (Polyimide, PI), which is not easy to conduct heat, but has the effect of protecting the circuit. The first surface 2001 of the lamp board 200 has a pad b, on which solder g is placed, and the welding end of the lamp board 200 has a notch f. The power circuit board 420 includes a power circuit layer 420a, and the power circuit board 420 defines a first surface 421 and a second surface 422 opposite to each other, and the second surface 422 is located on the side of the power circuit board 420 having the power circuit layer 420a. Pads a corresponding to each other are formed on the first surface 421 and the second surface 422 of the power circuit board 420, respectively, and solder g can be formed on the pads a. As a further optimization of welding stability and automated processing, the present embodiment places the lamp board 200 below the power circuit board 420 (refer to Figure 4B direction), that is, the first surface 2001 of the light board 200 will be connected to the second surface 422 of the power circuit board 420.

[0205] like Figure 4C and Figure 4DAs shown, when welding the lamp board 200 and the power circuit board 420, first place the circuit protection layer 200C of the lamp board 200 on the support platform 42 (the second side 2002 of the lamp board 200 contacts the support platform 42), so that the pad a of the second side 422 of the power circuit board 420 is in direct and full contact with the pad b of the first side 2001 of the lamp board 200, and then press the welding head 41 on the welding point between the lamp board 200 and the power circuit board 420. At this time, the heat of the welding head 41 will be directly transferred to the pad b of the first side 2001 of the lamp board 200 through the pad a of the first side 421 of the power circuit board 420, and the heat of the welding head 41 will not be affected by the circuit protection layer 200c with relatively poor thermal conductivity, which further improves the efficiency and stability of the welding at the junction of the pad a and the pad b of the lamp board 200 and the power circuit board 420. At the same time, the pad b on the first side 2001 of the lamp board 200 and the pad a on the second side 422 of the power supply circuit board 420 are in contact with each other, and the pads on the first side 421 of the power supply circuit board 420 are two unconnected pads (also called pads or power supply pads), which are respectively connected to the pads b of the lamp board. Figure 4C As shown, the power supply circuit board 420 and the light board 200 are completely welded by solder g. Figure 4C The virtual lines M and N in the figure are the main connecting parts of the power circuit board 420, the lamp board 200 and the solder g, which are, from top to bottom, the pad a of the first side 421 of the power circuit board 420, the power circuit layer 420a, the pad a of the second side 422 of the power circuit board 420, the circuit layer 200a of the lamp board 200, and the circuit protection layer 200C of the lamp board 200. The combined structure of the power circuit board 420 and the lamp board 200 formed in this order is more stable and firm.

[0206] In different embodiments, another circuit protection layer (PI layer) may be further provided on the first surface 2001 of the circuit layer 200a, that is, the circuit layer 200a may be sandwiched between two circuit protection layers, so that the first surface 2001 of the circuit layer 200a may also be protected by the circuit protection layer, and only a portion of the circuit layer 200a (the portion with the pad b) is exposed to be connected to the pad a of the power circuit board 420. At this time, a portion of the bottom of the light source 202 may contact the circuit protection layer on the first surface 2001 of the circuit layer 200a, and another portion may contact the circuit layer 200a.

[0207] In addition, the use of FIG. 4A to FIG. 4DAccording to the design scheme, a plurality of holes h are provided on the pad a of the power circuit board 420 (preferably, the number of holes h is multiple, such as 2, 3, 5, 7, 9, etc., depending on the area of ​​the pad, and the hole h may also be a through hole of other shapes). After the solder is placed, in the automated welding procedure, when the welding pressure head 41 is automatically pressed down onto the power circuit board 420, the solder will be pushed into the hole h due to the pressure, which satisfies the needs of automated processing well. Each pad a of the power circuit board 420 is provided with a plurality of holes h, and the number of holes h may be the same or different depending on the area of ​​the pad a. In actual application, the power circuit board 420 may be composed of two or more modules, which are arranged on both sides of the lamp board.

[0208] The pads configured on the flexible circuit board are two unconnected pads b (also called solder pads or light source pads), which are electrically connected to the positive and negative electrodes of the light source respectively. The size of the pads is about 3.5×2mm. There is also a corresponding pad a on the power circuit board. Solder is reserved above the pads. The thickness of the solder can be 0.1-0.7mm, and the preferred value is 0.3-0.5mm, with 0.4mm being the best. An insulating gap f can be set between the two pads to prevent the two pads from being electrically short-circuited due to the solder fusing together during the welding process. In addition, a positioning hole d can be set behind the insulating gap f to allow the automatic welding machine to correctly determine the correct position of the pad b.

[0209] In other embodiments, the diameter of the hole h of the pad a of the power circuit board can be 1-2 mm, preferably 1.2-1.8 mm, and most preferably 1.5 mm. If it is too small, the soldering tin will not easily pass through. When the pad a of the power circuit board is soldered with the pad b of the flexible circuit board, the soldering tin can pass through the hole h, and then accumulate on the hole h to cool and condense, forming a solder ball structure formed by solder g with a diameter larger than the hole h. This solder ball structure g will function like a nail. In addition to being fixed through the tin between the pad a and the pad b, the electrical connection can be more firmly fixed due to the function of the solder ball g structure.

[0210] In other embodiments, the pad b of the flexible circuit board may also be provided with a through hole (similar in structure to the hole h of the pad a, and the number depends on the area of ​​the pad b, such as 1, 2, 3, 4, etc.). When the through hole is ≤1 mm from the edge of the flexible circuit board, the soldering tin will pass through the through hole and accumulate on the upper edge of the hole. Excessive tin will also flow back from the edge of the flexible circuit board to the bottom, and then condense with the tin on the pad a. Its structure is like a rivet that firmly nails the flexible circuit board to the power circuit board, thus having a reliable electrical connection function. In addition, if the diameter of the through hole is too small, it will hinder the passage of tin. Therefore, the through hole of the pad b can also be changed to a notch f. The soldering tin passes through the notch to electrically connect and fix the pad a and the pad b. After cooling and condensation, more tin will form a solder ball with a diameter larger than the through hole. This solder ball structure will enhance the fixing ability of the electrical connection structure.

[0211] See also Fig. 8A , is a schematic diagram of the application circuit block of the power module of the LED straight tube lamp according to the embodiment of the present invention. The AC power supply 508 is used to provide an AC power signal. The AC power supply 508 can be a mains power supply with a voltage range of 100-277V and a frequency of 50 or 60Hz. The lamp tube driving circuit 505 receives the AC power signal of the AC power supply 508 and converts it into an AC driving signal as an external driving signal. The lamp tube driving circuit 505 can be an electronic ballast, which is used to convert the mains power signal into a high-frequency, high-voltage AC driving signal. Common types of electronic ballasts, such as: instant start (InstantStart) electronic ballasts, preheat start (Program Start) electronic ballasts, rapid start (Rapid Start) electronic ballasts, etc., are all applicable to the LED straight tube lamp of the present invention. The voltage of the AC driving signal is greater than 300V, and the preferred voltage range is 400-700V; the frequency is greater than 10kHz, and the preferred frequency range is 20k-50kHz. The LED straight tube lamp 500 receives an external driving signal. In this embodiment, the external driving signal is an AC driving signal of the lamp tube driving circuit 505, and is driven to emit light. In this embodiment, the LED straight tube lamp 500 is a driving structure of a single-ended power supply. The lamp head at the same end of the lamp tube has a first pin 501 and a second pin 502 for receiving an external driving signal. The first pin 501 and the second pin 502 of this embodiment are coupled (i.e., electrically connected, or directly or indirectly connected) to the lamp tube driving circuit 505 to receive the AC driving signal.

[0212] It is worth noting that the lamp driving circuit 505 is an omissible circuit, and is therefore indicated by a dotted line in the figure. When the lamp driving circuit 505 is omitted, the AC power source 508 is coupled to the first pin 501 and the second pin 502. At this time, the first pin 501 and the second pin 502 receive the AC power signal provided by the AC power source 508 as an external driving signal.

[0213] In addition to the application of the single-ended power supply mentioned above, the LED straight tube lamp 500 of the present invention can also be applied to a double-ended single-pin circuit structure and a double-ended double-pin circuit structure. Figure 8B , Figure 8B FIG. 1 is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Fig. 8A As shown, the first pin 501 and the second pin 502 of this embodiment are respectively placed on the double-ended lamp holders of the LED straight tube lamp 500 to form single pins at both ends. The remaining circuit connections and functions are the same as those of FIG. Fig. 8A The circuit shown is the same. For the circuit structure of double-ended double-pin, please refer to Figure 8C , Figure 8C FIG. 1 is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Fig. 8A and 8B As shown, this embodiment also includes a third pin 503 and a fourth pin 504. A lamp holder at one end of the lamp tube has a first pin 501 and a second pin 502, and a lamp holder at the other end has a third pin 503 and a fourth pin 504. The first pin 501, the second pin 502, the third pin 503 and the fourth pin 504 are coupled to a lamp tube driving circuit 505 to receive an AC driving signal together to drive the LED components (not shown) in the LED straight tube lamp 500 to emit light.

[0214] In the double-ended double-pin circuit structure, the double-ended single-pin power supply method or the double-ended double-pin power supply method can realize the power supply of the lamp tube by adjusting the configuration of the power module. Among them, in the double-ended single-pin power supply method (that is, the two ends of the lamp holder respectively provide external drive signals of different polarities), in an exemplary embodiment, the double-ended lamp holder can respectively have one pin that is empty / floating, for example, the second pin 502 and the third pin 503 can be in an empty / floating state, so that the lamp tube receives the external drive signal through the first pin 501 and the fourth pin 504, so as to make the power module inside the lamp tube perform subsequent rectification and filtering operations; in another exemplary embodiment, the pins of the double-ended lamp holder can be They are short-circuited together, for example, the first pin 501 and the second pin 502 on the same side of the lamp holder are short-circuited together, and the third pin 503 and the fourth pin 504 on the same side of the lamp holder are short-circuited together. In this way, the first pin 501 and the second pin 502 can be used to receive external drive signals of positive polarity or negative polarity, and the third pin 503 and the fourth pin 504 can be used to receive external drive signals of opposite polarity, so that the power module inside the lamp tube performs subsequent rectification and filtering operations. In the double-ended double-pin power supply mode (that is, the two pins of the lamp holder on the same side are respectively given external drive signals of different polarities), in an exemplary embodiment, the first pin 501 and the second pin 502 can receive external drive signals of opposite polarities, and the third pin 503 and the fourth pin 504 can receive external drive signals of opposite polarities, so that the power module inside the lamp tube performs subsequent rectification and filtering operations.

[0215] Next, see Fig.8D , is a schematic diagram of a circuit block of an LED lamp according to an embodiment of the present invention. The power module of the LED lamp mainly includes a first rectifier circuit 510 and a filter circuit 520, and may also include some components of an LED lighting module 530. The first rectifier circuit 510 is coupled to a first pin 501 and a second pin 502 to receive an external driving signal, rectify the external driving signal, and then output the rectified signal from a first rectifier output terminal 511 and a second rectifier output terminal 512. The external driving signal here can be Fig. 8A and Figure 8BThe AC driving signal or AC power signal in the LED light may even be a DC signal without affecting the operation of the LED light. The filter circuit 520 is coupled to the first rectifier circuit to filter the rectified signal; that is, the filter circuit 520 is coupled to the first rectifier output terminal 511 and the second rectifier output terminal 512 to receive the rectified signal, and filters the rectified signal, and then outputs the filtered signal from the first filtered output terminal 521 and the second filtered output terminal 522. The LED lighting module 530 is coupled to the filter circuit 520 to receive the filtered signal and emit light; that is, the LED lighting module 530 is coupled to the first filtered output terminal 521 and the second filtered output terminal 522 to receive the filtered signal, and then drives the LED component (not shown) in the LED lighting module 530 to emit light. Please refer to the description of the embodiments below for details of this part.

[0216] See also Fig. 8E , is a schematic diagram of a circuit block of an LED lamp according to an embodiment of the present invention. The power module of the LED lamp mainly includes a first rectifier circuit 510, a filter circuit 520, an LED lighting module 530 and a second rectifier circuit 540, which can be applied to Figure 8C The double-ended power supply architecture. The first rectifier circuit 510 is coupled to the first pin 501 and the second pin 502 to receive and rectify the external driving signal transmitted by the first pin 501 and the second pin 502; the second rectifier circuit 540 is coupled to the third pin 503 and the fourth pin 504 to receive and rectify the external driving signal transmitted by the third pin 503 and the fourth pin 504. In other words, the power supply module of the LED lamp can include the first rectifier circuit 510 and the second rectifier circuit 540, which output the rectified signal at the first rectifier output terminal 511 and the second rectifier output terminal 512. The filter circuit 520 is coupled to the first rectifier output terminal 511 and the second rectifier output terminal 512 to receive the rectified signal, and filter the rectified signal, and then output the filtered signal from the first filtered output terminal 521 and the second filtered output terminal 522. The LED lighting module 530 is coupled to the first filtered output terminal 521 and the second filtered output terminal 522 to receive the filtered signal and then drive the LED components (not shown) in the LED lighting module 530 to emit light.

[0217] See also Figure 8F , is a schematic diagram of a circuit block of an LED lamp according to an embodiment of the present invention. The power module of the LED lamp mainly includes a rectifier circuit 510', a filter circuit 520 and an LED lighting module 530, which can also be applied to Figure 8C This embodiment is similar to the above-mentioned double-terminal power supply architecture. Fig. 8EThe difference between the embodiments is that the rectifier circuit 510' can have three input terminals to couple the first pin 501, the second pin 502 and the third pin 503 respectively, and can rectify the signals received from the pins 501-503, wherein the fourth pin 504 can be floating or short-circuited with the third pin 503, so the configuration of the second rectifier circuit 540 can be omitted in this embodiment. The operation of the remaining circuits is the same as Fig. 8E They are basically the same, so I won’t repeat them here.

[0218] It is worth noting that in the present embodiment, the number of the first rectifier output terminal 511, the second rectifier output terminal 512, the first filtered output terminal 521, and the second filtered output terminal 522 are all two, while in actual application, the number may be increased or decreased according to the demand for signal transmission between the first rectifier circuit 510, the filtering circuit 520, and the LED lighting module 530, that is, the number of coupling endpoints between the circuits may be one or more.

[0219] FIG. 8D to FIG. 8F The power module of the LED lamp shown in the figure and the various embodiments of the power module of the LED lamp below are applicable to FIG. 8A to FIG. 8C In addition to the LED straight tube lamp shown, it is also applicable to the lamp holder specifications of various lighting lamps including two pins for transmitting power, such as bulb lamps, PAL lamps, tube energy-saving lamps (PLS lamps, PLD lamps, PLT lamps, PLL lamps, etc.). The implementation method of the bulb lamp can be used together with the implementation method of the structure of CN105465630A or CN105465663 to achieve a better effect of preventing electric shock.

[0220] When the LED straight tube lamp 500 of the present invention is applied to a double-ended at least single-pin power-on structure, it can be modified and then installed in a lamp holder including a lamp tube driving circuit or a ballast 505 (such as an electronic ballast or an inductive ballast), and is suitable for bypassing the ballast 505 and being powered by an AC power source 508 (such as a mains). Figure 8G , is a circuit block diagram of the connection between an LED straight tube lamp and an external power supply according to a preferred embodiment. Fig. 8A As shown, in this embodiment, a bypass ballast module 506 is added between the AC power supply 508 and the ballast 505, and the functions of the remaining circuit modules are the same as those of Figure 8B The circuit modules shown are similar or identical. The bypass ballast module 506 receives power from an AC power source 508 and Fig.8DThe double-ended first pin 501 and the second pin 502 connected to the LED straight tube lamp 500 (and the ballast 505 can be connected to perform specific control on the ballast 505) are used to bypass the power received from the AC power supply 508 and output to the first pin 501 and the second pin 502 to power the LED straight tube lamp 500. In various embodiments, the bypass ballast module 506 may include a switch for bypassing the power ballast 505. The switching circuit may include components or devices such as electrical or electronic switches. A person skilled in the art of fluorescent lamps can understand or design a feasible structure and circuit constituting the bypass ballast module 506. Furthermore, the bypass ballast module 506 may be disposed in a lamp holder of a conventional fluorescent lamp having a ballast 505, or may be disposed in a power module 5 or 250 of an LED straight tube lamp 500. Furthermore, if the bypass ballast module 506 is set to stop the bypass function, then Fig.8D The ballast 505 shown is still coupled to the first pin 501 and the second pin 502, so the LED straight tube lamp 500 can still be powered by the ballast 505 (receiving the AC power supply 508). Such modification (adding the bypass ballast module 506) allows the LED straight tube lamp 500 to be compatible with double-ended power supply by the AC power supply 508 (rather than powered by the ballast 505) even if it is installed in a lamp holder with a ballast 505.

[0221] See also Fig.9A , is a circuit diagram of a rectifier circuit according to an embodiment of the present invention. The rectifier circuit 610 is a bridge rectifier circuit, comprising a first rectifier diode 611, a second rectifier diode 612, a third rectifier diode 613 and a fourth rectifier diode 614, for full-wave rectification of the received signal. The anode of the first rectifier diode 611 is coupled to the second rectifier output terminal 512, and the cathode is coupled to the second pin 502. The anode of the second rectifier diode 612 is coupled to the second rectifier output terminal 512, and the cathode is coupled to the first pin 501. The anode of the third rectifier diode 613 is coupled to the second pin 502, and the cathode is coupled to the first rectifier output terminal 511. The anode of the rectifier diode 614 is coupled to the first pin 501, and the cathode is coupled to the first rectifier output terminal 511.

[0222] When the signal received by the first pin 501 and the second pin 502 is an AC signal, the operation of the rectifier circuit 610 is described as follows. When the AC signal is in a positive half-wave, the AC signal flows in through the first pin 501, the rectifier diode 614, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the first rectifier diode 611, and the second pin 502 in sequence. When the AC signal is in a negative half-wave, the AC signal flows in through the second pin 502, the third rectifier diode 613, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the second rectifier diode 612, and the pin 501 in sequence. Therefore, regardless of whether the AC signal is in a positive half-wave or a negative half-wave, the positive pole of the rectified signal of the rectifier circuit 610 is located at the first rectifier output terminal 511, and the negative pole is located at the second rectifier output terminal 512. According to the above operation description, the rectified signal output by the rectifier circuit 610 is a full-wave rectified signal.

[0223] When the first pin 501 and the second pin 502 are coupled to a DC power source and receive a DC signal, the operation of the rectifier circuit 610 is described as follows. When the first pin 501 is coupled to the positive terminal of the DC power source and the second pin 502 is coupled to the negative terminal of the DC power source, the DC signal flows in through the first pin 501, the rectifier diode 614, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the first rectifier diode 611, and the second pin 502 in sequence. When the first pin 501 is coupled to the negative terminal of the DC power source and the second pin 502 is coupled to the positive terminal of the DC power source, the AC signal flows in through the second pin 502, the third rectifier diode 613, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the second rectifier diode 612, and the first pin 501 in sequence. Similarly, no matter how the DC signal is input through the first pin 501 and the second pin 502 , the positive electrode of the rectified signal of the rectifier circuit 610 is located at the first rectifier output terminal 511 , and the negative electrode is located at the second rectifier output terminal 512 .

[0224] Therefore, in this embodiment, the rectifier circuit 610 can correctly output a rectified signal regardless of whether the received signal is an AC signal or a DC signal.

[0225] See also Fig. 9B , is a circuit diagram of a rectifier circuit according to an embodiment of the present invention. The rectifier circuit 710 includes a first rectifier diode 711 and a second rectifier diode 712, which are used to perform half-wave rectification on the received signal. The anode of the first rectifier diode 711 is coupled to the second pin 502, and the cathode is coupled to the first rectifier output terminal 511. The anode of the second rectifier diode 712 is coupled to the first rectifier output terminal 511, and the cathode is coupled to the first pin 501. The second rectifier output terminal 512 can be omitted or grounded depending on the actual application.

[0226] Next, the operation of the rectifying circuit 710 is described as follows.

[0227] When the AC signal is in the positive half-wave, the signal level of the AC signal input at the first pin 501 is higher than the signal level of the AC signal input at the second pin 502. At this time, the first rectifier diode 711 and the second rectifier diode 712 are both in the reverse-biased cut-off state, and the rectifier circuit 710 stops outputting the rectified signal. When the AC signal is in the negative half-wave, the signal level of the AC signal input at the first pin 501 is lower than the signal level of the AC signal input at the second pin 502. At this time, the first rectifier diode 711 and the second rectifier diode 712 are both in the forward-biased conduction state, and the AC signal flows in through the first rectifier diode 711 and the first rectifier output terminal 511, and flows out from the second rectifier output terminal 512 or another circuit or ground terminal of the LED lamp. According to the above operation instructions, the rectified signal output by the rectifier circuit 710 is a half-wave rectified signal.

[0228] in, Fig.9A and Fig. 9B When the first pin 501 and the second pin 502 of the rectifier circuit shown in the figure are changed to the third pin 503 and the fourth pin 504, the rectifier circuit can be used as Fig. 8E More specifically, in one exemplary embodiment, Fig.9A The full-wave rectifier circuit 610 shown is used in Fig. 8E When the double-ended input lamp is used, the configuration of the first rectifier circuit 510 and the second rectifier circuit 540 can be as follows: Fig. 9C See Fig. 9C , Fig. 9C FIG. 4 is a circuit diagram of a rectifier circuit according to an embodiment of the present invention.

[0229] The structure of the rectifier circuit 640 is the same as that of the rectifier circuit 610, both of which are bridge rectifier circuits. The rectifier circuit 610 includes first to fourth rectifier diodes 611-614, which are configured as described above. Fig.9A The rectifier circuit 640 includes a fifth rectifier diode 641, a sixth rectifier diode 642, a seventh rectifier diode 643, and an eighth rectifier diode 644, which are used to perform full-wave rectification on the received signal. The anode of the fifth rectifier diode 641 is coupled to the second rectifier output terminal 512, and the cathode is coupled to the fourth pin 504. The anode of the sixth rectifier diode 642 is coupled to the second rectifier output terminal 512, and the cathode is coupled to the third pin 503. The anode of the third rectifier diode 613 is coupled to the second pin 502, and the cathode is coupled to the first rectifier output terminal 511. The anode of the rectifier diode 614 is coupled to the third pin 503, and the cathode is coupled to the first rectifier output terminal 511.

[0230] In this embodiment, the rectifier circuits 640 and 610 are configured correspondingly, and the difference between the two is only that the rectifier circuit 610 (which can be compared to Fig. 8E The input end of the first rectifier circuit 510 is coupled to the first pin 501 and the second pin 502, and the rectifier circuit 640 (which can be compared to Fig. 8E The input end of the second rectifier circuit 540 is coupled to the third pin 503 and the fourth pin 504. In other words, the present embodiment adopts the architecture of two full-wave rectifier circuits to realize a double-terminal double-pin circuit structure.

[0231] Furthermore, in Fig. 9C Although the rectifier circuit of the embodiment is implemented with a double-end double-pin configuration, in addition to the double-end double-pin power supply mode, either single-end power supply or double-end single-pin power supply mode can be used to power the LED straight tube lamp through the circuit structure of this embodiment. The specific operation is described as follows:

[0232] In the case of single-ended power supply, the external driving signal can be applied to the first pin 501 and the second pin 502, or applied to the third pin 503 and the fourth pin 504. When the external driving signal is applied to the first pin 501 and the second pin 502, the rectifier circuit 610 will Fig.9A The operation method described in the embodiment performs full-wave rectification on the external driving signal, and the rectifier circuit 640 does not operate. On the contrary, when the external driving signal is applied to the third pin 503 and the fourth pin 504, the rectifier circuit 640 will Fig.9A The operation mode described in the embodiment performs full-wave rectification on the external driving signal, and the rectification circuit 610 does not operate.

[0233] In the case of double-ended single-pin power input, the external driving signal can be applied to the first pin 501 and the fourth pin 504, or to the second pin 502 and the third pin 503. When the external driving signal is applied to the first pin 501 and the fourth pin 504, and the external driving signal is an AC signal, during the period when the AC signal is in the positive half-wave, the AC signal flows in through the first pin 501, the fourth rectifier diode 614, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the fifth rectifier diode 641, and the fourth pin 504 in sequence. During the period when the AC signal is in the negative half-wave, the AC signal flows in through the fourth pin 504, the seventh rectifier diode 643, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the second rectifier diode 612, and the first pin 501 in sequence. Therefore, no matter whether the AC signal is in the positive half-wave or the negative half-wave, the positive pole of the rectified signal is located at the first rectifier output terminal 511, and the negative pole is located at the second rectifier output terminal 512. According to the above operation description, the second rectifier diode 612 and the fourth rectifier diode 614 in the rectifier circuit 610 cooperate with the fifth rectifier diode 641 and the seventh rectifier diode 643 in the rectifier circuit 640 to perform full-wave rectification on the AC signal, and the output rectified signal is a full-wave rectified signal.

[0234] On the other hand, when the external driving signal is applied to the second pin 502 and the third pin 503, and the external driving signal is an AC signal, during the period when the AC signal is in the positive half-wave, the AC signal flows in through the third pin 503, the eighth rectifier diode 644 and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the first rectifier diode 611 and the second pin 502 in sequence. During the period when the AC signal is in the negative half-wave, the AC signal flows in through the second pin 502, the third rectifier diode 613 and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the sixth rectifier diode 642 and the third pin 503 in sequence. Therefore, regardless of whether the AC signal is in the positive half-wave or the negative half-wave, the positive pole of the rectified signal is located at the first rectifier output terminal 511, and the negative pole is located at the second rectifier output terminal 512. According to the above operation instructions, the first rectifier diode 611 and the third rectifier diode 613 in the rectifier circuit 610 cooperate with the sixth rectifier diode 642 and the eighth rectifier diode 644 in the rectifier circuit 640 to full-wave rectify the AC signal, and the output rectified signal is a full-wave rectified signal.

[0235] In the case of double-ended double-pin power input, the operation of the rectifier circuits 610 and 640 can refer to the above Fig.9A The description of the embodiment is not repeated here. The rectified signals generated by the rectifier circuits 610 and 640 are superimposed on the first rectifier output terminal 511 and the second rectifier output terminal 512 and then output to the back-end circuit.

[0236] In an exemplary embodiment, the configuration of the rectifier circuit 510' can be as follows Fig.9D See Fig.9D , Fig.9D 910 is a circuit diagram of a rectifier circuit according to an embodiment of the present invention. The rectifier circuit 910 includes first to fourth rectifier diodes 911-914, which are configured as described above. Fig.9A In the present embodiment, the rectifier circuit 910 further includes a fifth rectifier diode 915 and a sixth rectifier diode 916. The anode of the fifth rectifier diode 915 is coupled to the second rectifier output terminal 512, and the cathode is coupled to the third pin 503. The anode of the sixth rectifier diode 916 is coupled to the third pin 503, and the cathode is coupled to the first rectifier output terminal 511. The fourth pin 504 is in a floating state.

[0237] More specifically, the rectifier circuit 510' of the present embodiment can be regarded as a rectifier circuit having three groups of bridge arm units, and each group of bridge arm units can provide an input signal receiving end. For example, the first rectifier diode 911 and the third rectifier diode 913 form a first bridge arm unit, which corresponds to receiving the signal on the second pin 502; the second rectifier diode 912 and the fourth rectifier diode 914 form a second bridge arm unit, which corresponds to receiving the signal on the first pin 501; and the fifth rectifier diode 915 and the sixth rectifier diode 916 form a third bridge arm unit, which corresponds to receiving the signal on the third pin 503. Among them, as long as two of the three groups of bridge arm units receive AC signals of opposite polarity, full-wave rectification can be performed. Based on this, in Fig.9E The configuration of the rectifier circuit of the embodiment is also compatible with single-end power supply, double-end single-pin power supply and double-end double-pin power supply. The specific operation is described as follows:

[0238] In the case of single-ended power supply, the external driving signal is applied to the first pin 501 and the second pin 502. At this time, the operation of the first to fourth rectifier diodes 911-914 is as described above. Fig.9A In the embodiment described above, the fifth rectifier diode 915 and the sixth rectifier diode 916 do not operate.

[0239] In the case of double-ended single-pin power input, the external driving signal can be applied to the first pin 501 and the third pin 503, or to the second pin 502 and the third pin 503. When the external driving signal is applied to the first pin 501 and the third pin 503, and the external driving signal is an AC signal, during the period when the AC signal is in the positive half-wave, the AC signal flows in through the first pin 501, the fourth rectifier diode 914, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the fifth rectifier diode 915, and the third pin 503 in sequence. During the period when the AC signal is in the negative half-wave, the AC signal flows in through the third pin 503, the sixth rectifier diode 916, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the second rectifier diode 912, and the first pin 501 in sequence. Therefore, no matter the AC signal is in the positive half-wave or the negative half-wave, the positive pole of the rectified signal is located at the first rectifier output terminal 511, and the negative pole is located at the second rectifier output terminal 512. According to the above operation description, the second rectifier diode 912, the fourth rectifier diode 914, the fifth rectifier diode 915 and the sixth rectifier diode 916 in the rectifier circuit 910 perform full-wave rectification on the AC signal, and the output rectified signal is a full-wave rectified signal.

[0240] On the other hand, when the external driving signal is applied to the second pin 502 and the third pin 503, and the external driving signal is an AC signal, during the period when the AC signal is in the positive half-wave, the AC signal flows in through the third pin 503, the sixth rectifier diode 916, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the first rectifier diode 911, and the second pin 502 in sequence. During the period when the AC signal is in the negative half-wave, the AC signal flows in through the second pin 502, the third rectifier diode 913, and the first rectifier output terminal 511 in sequence, and flows out through the second rectifier output terminal 512, the fifth rectifier diode 915, and the third pin 503 in sequence. Therefore, regardless of whether the AC signal is in the positive half-wave or the negative half-wave, the positive pole of the rectified signal is located at the first rectifier output terminal 511, and the negative pole is located at the second rectifier output terminal 512. According to the above operation instructions, the first rectifier diode 911, the third rectifier diode 913, the fifth rectifier diode 915 and the sixth rectifier diode 916 in the rectifier circuit 910 perform full-wave rectification on the AC signal, and the output rectified signal is a full-wave rectified signal.

[0241] In the case of double-ended double-pin power input, the operation of the first to fourth rectifier diodes 911-914 can refer to the above Fig.9AThe description of the embodiment is not repeated here. In addition, if the signal polarity of the third pin 503 is the same as that of the first pin 501, the operation of the fifth rectifier diode 915 and the sixth rectifier diode 916 is similar to that of the second rectifier diode 912 and the fourth rectifier diode 914 (i.e., the first bridge arm unit). On the other hand, if the signal polarity of the third pin 503 is the same as that of the second pin 502, the operation of the fifth rectifier diode 915 and the sixth rectifier diode 916 is similar to that of the first rectifier diode 911 and the third rectifier diode 913 (i.e., the second bridge arm unit).

[0242] See also Fig.9E , Fig.9E FIG. 4 is a circuit diagram of a rectifier circuit according to an embodiment of the present invention. Fig.9E and Fig.9D They are roughly the same, the difference is Fig.9E The input end of the first rectifier circuit 610 is further coupled to the endpoint conversion circuit 941. Among them, the endpoint conversion circuit 941 of this embodiment includes fuses 947 and 948. One end of the fuse 947 is coupled to the first pin 501, and the other end is coupled to the common node of the second rectifier diode 912 and the fourth rectifier diode 914 (that is, the input end of the first bridge arm unit). One end of the fuse 948 is coupled to the second pin 502, and the other end is coupled to the common node of the first rectifier diode 911 and the third rectifier diode 913 (that is, the input end of the second bridge arm unit). Thereby, when the current flowing through either the first pin 501 or the second pin 502 is higher than the rated current of the fuses 947 and 948, the fuses 947 and 948 will be blown and opened accordingly, thereby achieving the function of overcurrent protection. In addition, in the event that only one of the fuses 947 and 948 is blown (for example, the overcurrent condition only occurs for a short time and then disappears), if a double-ended double-pin power supply method is used to drive the lamp tube, the rectifier circuit of this embodiment can continue to operate based on the double-ended single-pin power supply mode after the overcurrent condition is eliminated.

[0243] See also Fig.9F , Fig.9F FIG. 4 is a circuit diagram of a rectifier circuit according to an embodiment of the present invention. Fig.9F and Fig.9D They are roughly the same, the difference is Fig.9F The two pins 503 and 504 are connected together by a thin (eg, copper) wire 917. Fig.9DFor example, in the embodiment 9E, when a double-ended single-pin is used for power input, the rectifier circuit of this embodiment can operate normally regardless of whether the external driving signal is applied to the third pin 503 or the fourth pin 504. In addition, when the third pin 503 and the fourth pin 504 are mistakenly connected to a lamp holder with a single-ended power input, the thin (copper) wire 917 of this embodiment can be reliably fused, so when the lamp is inserted back into the correct lamp holder, the straight tube lamp using this rectifier circuit can still maintain normal rectification work.

[0244] From the above, we can see that FIG. 9C to FIG. 9F The rectifier circuit of the embodiment is compatible with single-end power supply, double-end single-pin power supply and double-end double-pin power supply, thereby improving the application environment compatibility of the overall LED straight tube lamp. In addition, considering the actual circuit layout, Figures 9D to 9F In the embodiment, the circuit configuration inside the lamp tube only needs to set three pads (welded in combination) Figures 4A-4D The method of connecting the corresponding lamp head pins in the form of a PCB board (in the form of a PCB board) has a significant contribution to improving the overall process yield.

[0245] See also Fig. 10A , is a circuit block diagram of a filter circuit according to an embodiment of the present invention. The first rectifier circuit 510 is drawn in the figure only to indicate the connection relationship, and the non-filter circuit 520 includes the first rectifier circuit 510. The filter circuit 520 includes a filter unit 523, coupled to the first rectifier output terminal 511 and the second rectifier output terminal 512, to receive the rectified signal output by the rectifier circuit, and to output the filtered signal after filtering out the ripple in the rectified signal. Therefore, the waveform of the filtered signal is smoother than the waveform of the rectified signal. The filter circuit 520 may also include a filter unit 524, coupled between the rectifier circuit and the corresponding pin, for example: the first rectifier circuit 510 and the first pin 501, the first rectifier circuit 510 and the second pin 502, the second rectifier circuit 540 and the third pin 503, and the second rectifier circuit 540 and the fourth pin 504, to filter the specific frequency to filter out the specific frequency of the external drive signal. In this embodiment, the filter unit 524 is coupled between the first pin 501 and the first rectifier circuit 510. The filter circuit 520 may also include a filter unit 525, which is coupled between one of the first pin 501 and the second pin 502 and one of the diodes of the first rectifier circuit 510 or between one of the third pin 503 and the fourth pin 504 and one of the diodes of the second rectifier circuit 540, to reduce or filter out electromagnetic interference (EMI). In this embodiment, the filter unit 525 is coupled between the first pin 501 and one of the diodes (not shown) of the first rectifier circuit 510. Since the filter units 524 and 525 can be added or omitted depending on the actual application, they are indicated by dotted lines in the figure.

[0246] See also Fig. 10B, is a circuit diagram of a filter unit according to an embodiment of the present invention. The filter unit 623 includes a capacitor 625. One end of the capacitor 625 is coupled to the first rectifier output terminal 511 and the first filter output terminal 521, and the other end is coupled to the second rectifier output terminal 512 and the second filter output terminal 522, so as to perform low-pass filtering on the rectified signal output by the first rectifier output terminal 511 and the second rectifier output terminal 512, so as to filter out the high-frequency components in the rectified signal to form a filtered signal, which is then output by the first filter output terminal 521 and the second filter output terminal 522.

[0247] See also Fig. 10C , is a circuit diagram of a filter unit according to an embodiment of the present invention. The filter unit 723 is a π-type filter circuit, comprising a capacitor 725, an inductor 726, and a capacitor 727. One end of the capacitor 725 is coupled to the first rectifier output terminal 511 and is coupled to the first filter output terminal 521 through the inductor 726, and the other end is coupled to the second rectifier output terminal 512 and the second filter output terminal 522. The inductor 726 is coupled between the first rectifier output terminal 511 and the first filter output terminal 521. One end of the capacitor 727 is coupled to the first rectifier output terminal 511 and is coupled to the first filter output terminal 521 through the inductor 726, and the other end is coupled to the second rectifier output terminal 512 and the second filter output terminal 522.

[0248] In terms of equivalent, the filter unit 723 is Fig. 10B The filter unit 623 shown in the figure has an additional inductor 726 and a capacitor 727. In addition, the inductor 726 and the capacitor 727 also have a low-pass filtering function like the capacitor 725. Therefore, the filter unit 723 of this embodiment is more Fig. 10B The filter unit 623 shown has better high-frequency filtering capability, and the waveform of the output filtered signal is smoother.

[0249] The inductance of the inductor 726 in the above embodiment is preferably selected from the range of 10nH to 10mH. The capacitance of the capacitors 625, 725, 727 is preferably selected from the range of 100pF to 1uF.

[0250] See also Fig.11A, is a circuit diagram of an LED module according to an embodiment of the present invention. The positive end of the LED module 630 is coupled to the first filter output terminal 521, and the negative end is coupled to the second filter output terminal 522. The LED module 630 includes at least one LED unit 632, that is, the light source in the aforementioned embodiment. When there are more than two LED units 632, they are connected in parallel with each other. The positive end of each LED unit is coupled to the positive end of the LED module 630 to couple to the first filter output terminal 521; the negative end of each LED unit is coupled to the negative end of the LED module 630 to couple to the second filter output terminal 522. The LED unit 632 includes at least one LED component 631. When there are multiple LED components 631, the LED components 631 are connected in series, and the positive end of the first LED component 631 is coupled to the positive end of the LED unit 632 to which it belongs, and the negative end of the first LED component 631 is coupled to the next (second) LED component 631. The positive end of the last LED component 631 is coupled to the negative end of the previous LED component 631 , and the negative end of the last LED component 631 is coupled to the negative end of the LED unit 632 to which it belongs.

[0251] It is worth noting that the LED module 630 can generate a current detection signal S531 representing the magnitude of the current flowing through the LED module 630 , so as to be used for detecting and controlling the LED module 630 .

[0252] See also Fig. 11B , is a circuit diagram of an LED module according to an embodiment of the present invention. The positive terminal of the LED module 630 is coupled to the first filter output terminal 521, and the negative terminal is coupled to the second filter output terminal 522. The LED module 630 includes at least two LED units 732, and each LED unit 732 has a positive terminal coupled to the positive terminal of the LED module 630, and a negative terminal coupled to the negative terminal of the LED module 630. The LED unit 732 includes at least two LED components 731, and the connection method of the LED components 731 in the corresponding LED unit 732 is the same as Fig.11A As described above, the cathode of an LED component 731 is coupled to the anode of the next LED component 731, and the anode of the first LED component 731 is coupled to the anode of the LED unit 732 to which it belongs, and the cathode of the last LED component 731 is coupled to the cathode of the LED unit 732 to which it belongs. Furthermore, the LED units 732 in this embodiment are also connected to each other. The anodes of the n-th LED components 731 of each LED unit 732 are connected to each other, and the cathodes are also connected to each other. Therefore, the connection between the LED components of the LED module 630 of this embodiment is a mesh connection.

[0253] Compared to FIG. 12A to FIG. 12F In the embodiment, the LED lighting module 530 of the above embodiment includes an LED module 630 but does not include a driving circuit.

[0254] Likewise, the LED module 630 of the present embodiment can generate a current detection signal S531 representing the magnitude of the current flowing through the LED module 630 , so as to detect and control the LED module 630 .

[0255] In addition, in practical applications, the number of LED components 731 included in the LED unit 732 is preferably 15-25, and more preferably 18-22.

[0256] See also Fig. 11C , is a schematic diagram of the wiring of the LED module according to the embodiment of the present invention. The connection relationship of the LED component 831 of this embodiment is the same as Fig. 11B As shown, three LED units are used as an example for explanation. The positive wire 834 and the negative wire 835 receive the driving signal to provide power to each LED component 831. For example, the positive wire 834 is coupled to the first filter output terminal 521 of the aforementioned filter circuit 520, and the negative wire 835 is coupled to the second filter output terminal 522 of the aforementioned filter circuit 520 to receive the filtered signal. For the convenience of explanation, the nth LED unit in each LED unit is divided into the same LED group 833 in the figure.

[0257] The positive wire 834 is connected to the first LED component 831 of the three leftmost LED units, that is, the positive poles (left side) of the three LED components in the leftmost LED group 833 as shown in the figure, and the negative wire 835 is connected to the last LED component 831 of the three LED units, that is, the negative poles (right side) of the three LED components in the rightmost LED group 833 as shown in the figure. The negative pole of the first LED component 831 of each LED unit, the positive pole of the last LED component 831, and the positive poles and negative poles of other LED components 831 are connected through the connecting wire 839.

[0258] In other words, the positive poles of the three LED components 831 of the leftmost LED group 833 are connected to each other through the positive wire 834, and the negative poles thereof are connected to each other through the leftmost connecting wire 839. The positive poles of the three LED components 831 of the second left LED group 833 are connected to each other through the leftmost connecting wire 839, and the negative poles thereof are connected to each other through the second left connecting wire 839. Since the negative poles of the three LED components 831 of the leftmost LED group 833 and the positive poles of the three LED components 831 of the second left LED group 833 are connected to each other through the leftmost connecting wire 839, the negative pole of the first LED component of each LED unit is connected to the positive pole of the second LED component. And so on, thus forming a structure as follows. Fig. 11B Mesh connection shown.

[0259] It is worth noting that the width 836 of the portion of the connecting wire 839 connected to the positive electrode of the LED component 831 is smaller than the width 837 of the portion connected to the negative electrode of the LED component 831. The area of ​​the portion connected to the negative electrode is larger than the area of ​​the portion connected to the positive electrode. In addition, the width 837 is smaller than the width 838 of the portion of the connecting wire 839 that simultaneously connects the positive electrode of one of the two adjacent LED components 831 and the negative electrode of the other, so that the area of ​​the portion connected to both the positive electrode and the negative electrode is larger than the area of ​​the portion connected only to the negative electrode and the area of ​​the portion connected to the positive electrode. Therefore, such a wiring structure helps to dissipate heat in the LED component.

[0260] In addition, the positive wire 834 may further include a positive lead 834a, and the negative wire 835 may further include a negative lead 835a, so that both ends of the LED module have positive and negative connection points. Such a wiring structure allows other circuits of the power module of the LED lamp, such as the filter circuit 520, the first rectifier circuit 510, and the second rectifier circuit 540, to be coupled to the LED module from the positive and negative connection points at either end or both ends, thereby increasing the flexibility of the actual circuit configuration arrangement.

[0261] See also Fig.11D , is a schematic diagram of the wiring of the LED module according to the embodiment of the present invention. The connection relationship of the LED component 931 of this embodiment is the same as Fig.11A As shown, here, three LED units and each LED unit includes 7 LED components as an example for explanation. The positive wire 934 and the negative wire 935 receive the driving signal to provide power to each LED component 931. For example, the positive wire 934 is coupled to the first filter output terminal 521 of the aforementioned filter circuit 520, and the negative wire 935 is coupled to the second filter output terminal 522 of the aforementioned filter circuit 520 to receive the filtered signal. For the convenience of explanation, the seven LED components in each LED unit are divided into the same LED group 932 in the figure.

[0262] The positive lead 934 is connected to the positive electrode (left side) of the first (leftmost) LED component 931 in each LED group 932. The negative lead 935 is connected to the negative electrode (right side) of the last (rightmost) LED component 931 in each LED group 932. In each LED group 932, the negative electrode of the left LED component 931 of the two adjacent LED components 931 is connected to the positive electrode of the right LED component 931 through the connecting lead 939. In this way, the LED components of the LED group 932 are connected in series.

[0263] It is worth noting that the connecting wire 939 is used to connect the cathode of one of the two adjacent LED components 931 and the anode of the other. The cathode wire 935 is used to connect the cathode of the last (rightmost) LED component 931 of each LED group. The anode wire 934 is used to connect the anode of the first (leftmost) LED component 931 of each LED group. Therefore, its width and the heat dissipation area for the LED components are from large to small in the above order. In other words, the width 938 of the connecting wire 939 is the largest, the width 937 of the cathode wire 935 connected to the cathode of the LED component 931 is the second largest, and the width 936 of the anode wire 934 connected to the anode of the LED component 931 is the smallest. Therefore, such a wiring structure helps to dissipate heat from the LED components.

[0264] In addition, the positive wire 934 may further include a positive lead 934a, and the negative wire 935 may further include a negative lead 935a, so that both ends of the LED module have positive and negative connection points. Such a wiring structure allows other circuits of the power module of the LED lamp, such as the filter circuit 520, the first rectifier circuit 510, and the second rectifier circuit 540, to be coupled to the LED module from the positive and negative connection points at either end or both ends, thereby increasing the flexibility of the actual circuit configuration arrangement.

[0265] Furthermore, Fig. 11C and 11D The wiring shown in FIG. 1 can be implemented by a flexible circuit board. For example, the flexible circuit board has a single circuit layer formed by etching. Fig. 11C The positive electrode wire 834, the positive electrode lead 834a, the negative electrode wire 835, the negative electrode lead 835a and the connecting wire 839, and Fig.11D The positive electrode wire 934, the positive electrode lead 934a, the negative electrode wire 935, the negative electrode lead 935a and the connecting wire 939.

[0266] See also Fig.11E , Fig.11E FIG. 1 is a schematic diagram of the wiring of the LED module according to the embodiment of the present invention. The connection relationship of the LED assembly 1031 of this embodiment is the same as FIG. Fig. 11B The configuration of the positive and negative lead wires (not shown) and the connection relationship with other circuits in this embodiment are similar to those in the above-mentioned Fig.11D The difference between the two is that this embodiment will Fig. 11C The horizontal configuration of LED components 831 (i.e., each LED component 831 has its positive and negative poles arranged along the extension direction of the wire) is changed to a vertical configuration of LED components 1031 (i.e., the connection direction of the positive and negative poles of each LED component 1031 is perpendicular to the extension direction of the wire), and the configuration of the connecting wire 1039 is adjusted accordingly based on the configuration direction of the LED components 1031.

[0267] More specifically, taking the connecting wire 1039_2 as an example, the connecting wire 1039_2 includes a first long side portion with a narrower width 1037, a second long side portion with a wider width 1038, and a turning portion connecting the two long sides. The connecting wire 1039_2 can be set to a right-angle z-shaped shape, that is, the connection between each long side portion and the turning portion is at a right angle. Among them, the first long side portion of the connecting wire 1039_2 will be configured correspondingly to the second long side portion of the adjacent connecting wire 1039_3; similarly, the second long side portion of the connecting wire 1039_2 will be configured correspondingly to the first long side portion of the adjacent connecting wire 1039_1. As can be seen from the above configuration, the connecting wires 1039 are arranged in the extending direction of the extended side, and the first long side of each connecting wire 1039 is arranged corresponding to the second long side of the adjacent connecting wire 1039; similarly, the second long side of each connecting wire 1039 is arranged corresponding to the first long side of the adjacent connecting wire 1039, so that the connecting wires 1039 are configured with a uniform width as a whole. The configuration of other connecting wires 1039 can refer to the description of the connecting wire 1039_2 above.

[0268] As for the relative configuration of the LED components 1031 and the connecting wires 1039, the connecting wire 1039_2 is also used for explanation. In this embodiment, the positive electrodes of some LED components 1031 (for example, the four LED components 1031 on the right) are connected to the first long side of the connecting wire 1039_2, and are connected to each other through the first long side; and the negative electrodes of these LED components 1031 are connected to the second long side of the adjacent connecting wire 1039_3, and are connected to each other through the second long side. On the other hand, the positive electrodes of another part of the LED components 1031 (for example, the four LED components 1031 on the left) are connected to the first long side of the connecting wire 1039_1, and the negative electrodes are connected to the second long side of the connecting wire 1039_2.

[0269] In other words, the positive poles of the four LED components 1031 on the left are connected to each other through the connecting wire 1039_1, and the negative poles thereof are connected to each other through the connecting wire 1039_2. The positive poles of the four LED components 1031 on the right are connected to each other through the connecting wire 1039_2, and the negative poles thereof are connected to each other through the connecting wire 1039_3. Since the negative poles of the four LED components 1031 on the left are connected to the positive poles of the four LED components 1031 on the right through the connecting wire 1039_2, the four LED components 1031 on the left can be simulated as the first LED component of the four LED units in the LED module, and the four LED components 1031 on the right can be simulated as the second LED component of the four LED units in the LED module, and so on, thereby forming a structure as shown in FIG. Fig. 11B Mesh connection shown.

[0270] It is worth noting that compared with Fig. 11C From the perspective of the embodiment, the LED components 1031 are changed to a longitudinal configuration, which can increase the gaps between the LED components 1031 and widen the routing of the connecting wires, thereby avoiding the risk of the lines being easily punctured when the lamp tubes are repaired, and at the same time avoiding the problem of insufficient copper foil coverage between the lamp beads causing short circuits when there are a large number of LED components 1031 and they need to be arranged closely.

[0271] On the other hand, by configuring the width 1036 of the first long side of the positive connection portion to be smaller than the width 1037 of the second long side of the negative connection portion, the area of ​​the LED component 1031 at the negative connection portion can be larger than that at the positive connection portion. Therefore, such a wiring structure is helpful for heat dissipation of the LED component.

[0272] See also Fig.11F , Fig.11F Schematic diagram of the wiring of the LED module according to the embodiment of the present invention. Fig.11E The embodiments are substantially the same, and the only difference between the two is that the connecting wire 1139 of this embodiment is implemented in a non-right-angle Z-shaped routing. In other words, in this embodiment, the turning portion forms an oblique routing, so that the connection between each long side of the connecting wire 1139 and the turning portion is non-right angle. Under the configuration of this embodiment, in addition to the longitudinal configuration of the LED components 1131, the gap between the LED components 1031 can be increased, and the routing of the connecting wire can be widened. The oblique configuration of the connecting wire in this embodiment can avoid the problem of LED component displacement and offset due to uneven pads when the LED components are mounted.

[0273] Specifically, in the application of using flexible printed circuit board as a light board, vertical wiring (such as Figures 11C to 11E The configuration of () will produce regular white oil depressions at the turning points of the wires, so that the tinned area on the LED component soldering pad on the connecting wire is relatively in a raised position. Since the tinned area is not a flat surface, the LED component may not be attached to the predetermined position due to the uneven surface when the LED component is mounted. Therefore, this embodiment adjusts the vertical routing to the diagonal routing configuration to make the copper foil strength of the entire routing uniform without protrusions or unevenness at specific positions, thereby making it easier for the LED component 1131 to be attached to the wire, thereby improving the reliability of the lamp tube during assembly. In addition, since each LED unit in this embodiment only has one diagonal substrate on the lamp board, the strength of the overall lamp board can be greatly improved, thereby preventing the lamp board from bending and shortening the length of the lamp board.

[0274] In addition, in an exemplary embodiment, copper foil may be covered around the solder pad of the LED component 1131 to offset the offset of the LED component 1131 during mounting, thereby avoiding the generation of solder balls that cause short circuits.

[0275] See also Fig.11G , Fig.11G FIG. 1 is a schematic diagram of the wiring of an LED module according to an embodiment of the present invention. Fig. 11C The difference between the two is that the corresponding part (not the pad of the LED component 1231) between the connecting wire 1239 of this embodiment is changed to an oblique line. Among them, the embodiment adjusts the vertical line to an oblique line configuration, so that the copper foil strength of the entire line is uniform, and there will be no bulge or unevenness at a specific position, so that the LED component 1131 can be more easily attached to the wire, thereby improving the reliability of the lamp tube when assembled.

[0276] In addition, under the configuration of this embodiment, the color temperature point CTP can also be uniformly set between the LED components 1231, such as Fig.11H As shown, Fig.11H The diagram is a wiring diagram of an LED module according to an embodiment of the present invention. By uniformly setting the color temperature points CTP in the configuration of the LED components, after the wires are spliced ​​to form the LED module, the color temperature points CTP at the corresponding positions on each wire can be on the same line. In this way, when tinning, the entire LED module can be covered with only a few tapes (as shown in the figure, if each wire is set with 3 color temperature points, only 3 tapes are needed) to cover all the color temperature points on the LED module, thereby improving the smoothness of the assembly process and saving assembly time.

[0277] See also Fig.11I , Fig.11I This is a schematic diagram of a lamp board soldering pad according to a preferred embodiment of the present invention, wherein: Fig.11I : is a diagram showing the configuration of the solder pads at the end of the lamp board. In this embodiment, the solder pads b1 and b2 on the lamp board are suitable for soldering together with the power solder pads of the power circuit board. Among them, the solder pad configuration of this embodiment can be applied to the double-ended single-pin power input method, that is, the solder pads on the same side will receive external drive signals of the same polarity.

[0278] Specifically, the pads b1 and b2 of the present embodiment are connected together through an S-shaped fuse FS, wherein the fuse FS can be, for example, formed of a thin wire with a very low impedance, so the pads b1 and b2 can be considered to be short-circuited together. In a correct application scenario, the pads b1 and b2 will receive external drive signals of the same polarity respectively. With the described configuration, even if the pads b1 and b2 are mistakenly connected to external drive signals of opposite polarities, the fuse FS will react to the large current passing through and blow, thereby avoiding damage to the lamp tube. In addition, after the fuse FS blows, a configuration is formed in which the pad b2 is unconnected and the pad b1 is still connected to the lamp board, so the lamp board can still receive external drive signals through the pad b1 and continue to be used.

[0279] On the other hand, in an exemplary embodiment, the thickness of the wiring of the pads b1 and b2 and the pad body is at least 0.4 mm. The actual thickness can be selected according to the understanding of those skilled in the art, and any thickness greater than 0.4 mm can be selected under feasible circumstances. After verification, under the configuration that the thickness of the wiring of the pads b1 and b2 and the pad body is at least 0.4 mm, when the lamp board is connected to the power circuit board through the pads b1 and b2 and placed in the lamp tube, even if the copper foil at the pads b1 and b2 is broken, the copper foil attached to the periphery can connect the circuit of the lamp board and the power circuit board, so that the lamp tube can work normally.

[0280] In addition, in another exemplary embodiment, the positions of the pads b1 and b2 on the lamp board can be set to have a gap with the edge of the lamp board. Through the above-mentioned gap configuration, the power circuit board and the lamp board can have a larger position tolerance when welding.

[0281] See also Fig.11J , is a schematic diagram of the wiring of the LED module according to the embodiment of the present invention. Fig. 11C The routing of the LED module is changed from a single-layer circuit layer to a double-layer circuit layer, mainly by changing the positive lead 834a and the negative lead 835a to the second circuit layer. The explanation is as follows.

[0282] Please also see Figure 7 The flexible circuit board has a double-layer circuit layer, including a first circuit layer 2a, a dielectric layer 2b and a second circuit layer 2c. The first circuit layer 2a and the second circuit layer 2c are electrically isolated by the dielectric layer 2b. The first circuit layer 2a of the flexible circuit board is formed by etching. Fig.11JThe positive wire 834, the negative wire 835 and the connecting wire 839 in the flexible circuit board are used to electrically connect the multiple LED components 831, for example: the multiple LED components are electrically connected in a mesh connection, and the second circuit layer 2c is etched with positive leads 834a and negative leads 835a to electrically connect the filter circuit (the filter output end). In addition, the positive wire 834 and the negative wire 835 of the first circuit layer 2a of the flexible circuit board have layer connection points 834b and 835b. The positive lead 834a and the negative lead 835a of the second circuit layer 2 have layer connection points 834c and 835c. The layer connection points 834b and 835b are opposite to the layer connection points 834c and 835c, and are used to electrically connect the positive wire 834 and the positive lead 834a, and the negative wire 835 and the negative lead 835a. A better approach is to align the positions of the layer connection points 834b and 835b of the first circuit layer with the lower conductive layer to form openings to the exposed layer connection points 834c and 835c, and then use solder to electrically connect the positive wire 834 and the positive lead 834a, as well as the negative wire 835 and the negative lead 835a to each other.

[0283] Likewise, Fig.11D The routing of the LED module shown can also be changed to the positive lead 934a and the negative lead 935a to the second circuit layer to form a double-layer wiring structure.

[0284] Since the perforations hp increase the contact area between the solder and the power pads a1, a2, and a3, the adhesion between the power pads a1, a2, and a3 and the light source pads is further enhanced. In addition, the setting of the perforations hp can also increase the heat dissipation area, so that the thermal characteristics of the lamp tube can be improved. In this embodiment, the number of perforations hp can be selected as 7 or 9 according to the size of the pads a1, a2, and a3. If a configuration of 7 perforations hp is selected for implementation, the arrangement of the perforations hp can be that 6 perforations hp are arranged on a circumference and the remaining one is arranged at the center of the circle. If a configuration of 9 perforations hp is selected for implementation, the perforations hp can be arranged in a 3x3 array. The above configuration selection can better increase the contact area and improve the heat dissipation effect.

[0285] It is worth noting that the thickness of the second conductive layer of the flexible circuit board with a double conductive layer or a circuit layer is preferably thicker than the thickness of the first conductive layer, thereby reducing the line loss (voltage drop) on the positive lead and the negative lead. Furthermore, compared with the flexible circuit board with a single conductive layer, the width of the flexible circuit board with a double conductive layer can be reduced because the positive lead and the negative lead at both ends are moved to the second layer. On the same fixture, the number of narrower substrates is greater than that of wider substrates, so the production efficiency of LED modules can be improved. Moreover, the flexible circuit board with a double conductive layer is relatively easier to maintain its shape to increase the reliability of production, for example: the accuracy of the welding position when welding the LED components. Of course, the pad structure can be applied to a flexible circuit board with a single conductive layer or a circuit layer. The number of LED components depends on the application (the power of the LED straight tube lamp).

[0286] See also Fig. 12A , is a schematic diagram of an application circuit block of a power module of an LED lamp according to an embodiment of the present invention. Figure 8C As shown, the power module of the LED lamp of this embodiment includes a first rectifier circuit 510, a filter circuit 520, and a drive circuit 1530, wherein the drive circuit 1530 and the LED module 630 constitute an LED lighting module 530. The drive circuit 1530 is a DC-to-DC conversion circuit, coupled to the first filter output terminal 521 and the second filter output terminal 522 to receive the filtered signal, and performs power conversion to convert the filtered signal into a drive signal and output it at the first drive output terminal 1521 and the second drive output terminal 1522. The LED module 630 is coupled to the first drive output terminal 1521 and the second drive output terminal 1522 to receive the drive signal and emit light. Preferably, the current of the LED module 630 is stabilized at a set current value. The LED module 630 can be seen in FIG. 11A to FIG. 11D Description.

[0287] See also Fig. 12B , is a circuit block diagram of a driving circuit according to an embodiment of the present invention. The driving circuit includes a controller 1531 and a conversion circuit 1532, which performs power conversion in a current source mode to drive the LED module to emit light. The conversion circuit 1532 includes a switch circuit 1535 and a storage circuit 1538. The conversion circuit 1532 is coupled to the first filter output terminal 521 and the second filter output terminal 522, receives the filtered signal, and converts it into a driving signal according to the control of the controller 1531 and outputs it from the first driving output terminal 1521 and the second driving output terminal 1522 to drive the LED module. Under the control of the controller 1531, the driving signal output by the conversion circuit 1532 is a stable current, so that the LED module emits light stably.

[0288] See also Fig. 12C, is a circuit diagram of a driving circuit according to an embodiment of the present invention. In this embodiment, the driving circuit 1630 is a step-down DC-to-DC conversion circuit, including a controller 1631 and a conversion circuit, and the conversion circuit includes an inductor 1632, a freewheeling diode 1633, a capacitor 1634, and a switch 1635. The driving circuit 1630 is coupled to the first filter output terminal 521 and the second filter output terminal 522 to convert the received filtered signal into a driving signal to drive the LED module coupled between the first drive output terminal 1521 and the second drive output terminal 1522.

[0289] In this embodiment, the switch 1635 is a metal oxide semiconductor field effect transistor, having a control terminal, a first terminal and a second terminal. The first terminal of the switch 1635 is coupled to the positive electrode of the freewheeling diode 1633, the second terminal is coupled to the second filter output terminal 522, and the control terminal is coupled to the controller 1631 to accept the control of the controller 1631 to make the first terminal and the second terminal conductive or cut off. The first drive output terminal 1521 is coupled to the first filter output terminal 521, the second drive output terminal 1522 is coupled to one end of the inductor 1632, and the other end of the inductor 1632 is coupled to the first terminal of the switch 1635. The capacitor 1634 is coupled between the first drive output terminal 1521 and the second drive output terminal 1522 to stabilize the voltage difference between the first drive output terminal 1521 and the second drive output terminal 1522. The negative terminal of the freewheeling diode 1633 is coupled to the first drive output terminal 1521.

[0290] Next, the operation of the driving circuit 1630 will be described.

[0291] The controller 1631 determines the on and off time of the switch 1635 according to the current detection signal S535 or / and S531, that is, controls the duty cycle of the switch 1635 to adjust the size of the driving signal. The current detection signal S535 represents the size of the current flowing through the switch 1635. The current detection signal S531 represents the size of the current flowing through the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522. According to any one of the current detection signals S531 and S535, the controller 1631 can obtain information about the size of the power converted by the conversion circuit. When the switch 1635 is turned on, the current of the filtered signal flows into the first filtering output terminal 521, passes through the capacitor 1634 and the first driving output terminal 1521 to the LED module, the inductor 1632, the switch 1635, and then flows out from the second filtering output terminal 522. At this time, the capacitor 1634 and the inductor 1632 store energy. When the switch 1635 is turned off, the inductor 1632 and the capacitor 1634 release the stored energy, and the current flows to the first driving output terminal 1521 through the freewheeling diode 1633 so that the LED module continues to emit light.

[0292] It is worth noting that capacitor 1634 is not a necessary component and can be omitted, so it is indicated by a dotted line in the figure. In some application environments, the capacitor 1634 can be omitted to achieve the effect of stabilizing the LED module current by taking advantage of the characteristic that the inductor will resist the change of current.

[0293] From another perspective, the driving circuit 1630 keeps the current flowing through the LED module unchanged. Therefore, for some LED modules (e.g., white, red, blue, green, etc. LED modules), the situation where the color temperature changes with the current can be improved, that is, the LED module can maintain the color temperature unchanged at different brightness. The inductor 1632, which acts as a storage circuit, releases the stored energy when the switching switch 1635 is turned off, which allows the LED module to keep emitting light continuously on the one hand, and also prevents the current and voltage on the LED module from dropping to the minimum value on the other hand. When the switching switch 1635 is turned on again, the current and voltage do not need to go back and forth from the minimum value to the maximum value, thereby avoiding the intermittent emission of the LED module and improving the overall brightness of the LED module, reducing the minimum conduction period, and increasing the driving frequency.

[0294] See also Fig.12D , is a circuit diagram of a driving circuit according to an embodiment of the present invention. In this embodiment, the driving circuit 1730 is a boost DC-DC conversion circuit, including a controller 1731 and a conversion circuit, and the conversion circuit includes an inductor 1732, a freewheeling diode 1733, a capacitor 1734 and a switch 1735. The driving circuit 1730 converts the filtered signal received by the first filter output terminal 521 and the second filter output terminal 522 into a driving signal to drive the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522.

[0295] One end of the inductor 1732 is coupled to the first filter output terminal 521, and the other end is coupled to the positive electrode of the filter diode 1733 and the first end of the switch 1735. The second end of the switch 1735 is coupled to the second filter output terminal 522 and the second drive output terminal 1522. The cathode of the freewheeling diode 1733 is coupled to the first drive output terminal 1521. The capacitor 1734 is coupled between the first drive output terminal 1521 and the second drive output terminal 1522.

[0296] The controller 1731 is coupled to the control end of the switching switch 1735, and controls the on and off of the switching switch 1735 according to the current detection signal S531 and / or the current detection signal S535. When the switching switch 1735 is turned on, the current flows in from the first filter output terminal 521, flows through the inductor 1732, switches the switch 1735, and then flows out from the second filter output terminal 522. At this time, the current flowing through the inductor 1732 increases with time, and the inductor 1732 is in an energy storage state. At the same time, the capacitor 1734 is in an energy release state to continuously drive the LED module to emit light. When the switching switch 1735 is turned off, the inductor 1732 is in an energy release state, and the current of the inductor 1732 decreases with time. The current of the inductor 1732 flows to the capacitor 1734 and the LED module through the freewheeling diode 1733. At this time, the capacitor 1734 is in an energy storage state.

[0297] It is worth noting that capacitor 1734 is an omissible component, which is indicated by a dotted line. When capacitor 1734 is omitted, when switch 1735 is turned on, the current of inductor 1732 does not flow through the LED module, so that the LED module does not emit light; when switch 1735 is turned off, the current of inductor 1732 flows through the LED module via freewheeling diode 1733, so that the LED module emits light. By controlling the light-emitting time of the LED module and the magnitude of the current flowing through, the average brightness of the LED module can be stabilized at the set value, thereby achieving the same effect of stable light emission.

[0298] From another perspective, the driving circuit 1730 keeps the current flowing through the LED module unchanged. Therefore, for some LED modules (e.g., white, red, blue, green, etc. LED modules), the situation where the color temperature changes with the current can be improved, that is, the LED module can maintain the color temperature unchanged at different brightness. The inductor 1732, which acts as a storage circuit, releases the stored energy when the switching switch 1735 is turned off, which makes the LED module continue to emit light on the one hand, and also prevents the current and voltage on the LED module from dropping to the minimum value on the other hand. When the switching switch 1735 is turned on again, the current and voltage do not need to go back and forth from the minimum value to the maximum value, thereby avoiding the intermittent light emission of the LED module and improving the overall brightness of the LED module, reducing the minimum conduction period and increasing the driving frequency.

[0299] See also Fig.12E, is a circuit diagram of a driving circuit according to an embodiment of the present invention. In this embodiment, the driving circuit 1830 is a step-down DC-to-DC conversion circuit, including a controller 1831 and a conversion circuit, and the conversion circuit includes an inductor 1832, a freewheeling diode 1833, a capacitor 1834, and a switch 1835. The driving circuit 1830 is coupled to the first filter output terminal 521 and the second filter output terminal 522 to convert the received filtered signal into a driving signal to drive the LED module coupled between the first driving output terminal 1521 and the second driving output terminal 1522.

[0300] The first end of the switch 1835 is coupled to the first filter output terminal 521, the second end is coupled to the cathode of the freewheeling diode 1833, and the control end is coupled to the controller 1831 to receive the control signal of the controller 1831 to make the state between the first end and the second end conductive or cut off. The anode of the freewheeling diode 1833 is coupled to the second filter output terminal 522. One end of the inductor 1832 is coupled to the second end of the switch 1835, and the other end is coupled to the first drive output terminal 1521. The second drive output terminal 1522 is coupled to the anode of the freewheeling diode 1833. The capacitor 1834 is coupled between the first drive output terminal 1521 and the second drive output terminal 1522 to stabilize the voltage between the first drive output terminal 1521 and the second drive output terminal 1522.

[0301] The controller 1831 controls the on and off of the switch 1835 according to the current detection signal S531 or / and the current detection signal S535. When the switch 1835 is on, the current flows in from the first filter output terminal 521, passes through the switch 1835, the inductor 1832, and passes through the capacitor 1834 and the first drive output terminal 1521, the LED module and the second drive output terminal 1522, and then flows out from the second filter output terminal 522. At this time, the current flowing through the inductor 1832 and the voltage of the capacitor 1834 increase over time, and the inductor 1832 and the capacitor 1834 are in an energy storage state. When the switch 1835 is turned off, the inductor 1832 is in an energy release state, and the current of the inductor 1832 decreases over time. At this time, the current of the inductor 1832 returns to the inductor 1832 through the first drive output terminal 1521, the LED module and the second drive output terminal 1522, and the freewheeling diode 1833 to form a freewheeling current.

[0302] It is worth noting that the capacitor 1834 is an optional component, which is indicated by a dotted line in the figure. When the capacitor 1834 is omitted, no matter whether the switch 1835 is turned on or off, the current of the inductor 1832 can flow through the first driving output terminal 1521 and the second driving output terminal 1522 to drive the LED module to continuously emit light.

[0303] From another perspective, the driving circuit 1830 keeps the current flowing through the LED module unchanged. Therefore, for some LED modules (e.g., white, red, blue, green, etc. LED modules), the situation where the color temperature changes with the current can be improved, that is, the LED module can maintain the color temperature unchanged at different brightness. The inductor 1832, which acts as a storage circuit, releases the stored energy when the switching switch 1835 is turned off. On the one hand, it allows the LED module to continue to emit light, and on the other hand, it prevents the current and voltage on the LED module from dropping to the minimum value. When the switching switch 1835 is turned on again, the current and voltage do not need to go back and forth from the minimum value to the maximum value, thereby avoiding the intermittent light emission of the LED module and improving the overall brightness of the LED module, reducing the minimum conduction period and increasing the driving frequency.

[0304] See also Fig.12F , is a circuit diagram of a driving circuit according to an embodiment of the present invention. In this embodiment, the driving circuit 1930 is a step-down DC-to-DC conversion circuit, including a controller 1931 and a conversion circuit, and the conversion circuit includes an inductor 1932, a freewheeling diode 1933, a capacitor 1934, and a switch 1935. The driving circuit 1930 is coupled to the first filter output terminal 521 and the second filter output terminal 522 to convert the received filtered signal into a driving signal to drive the LED module coupled between the first drive output terminal 1521 and the second drive output terminal 1522.

[0305] One end of the inductor 1932 is coupled to the first filter output terminal 521 and the second drive output terminal 1522, and the other end is coupled to the first end of the switch 1935. The second end of the switch 1935 is coupled to the second filter output terminal 522, and the control end is coupled to the controller 1931 to be turned on or off according to the control signal of the controller 1931. The positive electrode of the freewheeling diode 1933 is coupled to the connection point between the inductor 1932 and the switch 1935, and the negative electrode is coupled to the first drive output terminal 1521. The capacitor 1934 is coupled to the first drive output terminal 1521 and the second drive output terminal 1522 to stabilize the driving of the LED module coupled between the first drive output terminal 1521 and the second drive output terminal 1522.

[0306] The controller 1931 controls the on and off of the switch 1935 according to the current detection signal S531 and / or the current detection signal S535. When the switch 1935 is on, the current flows in from the first filter output terminal 521, flows through the inductor 1932, switches the switch 1935, and then flows out from the second filter output terminal 522. At this time, the current flowing through the inductor 1932 increases with time, and the inductor 1932 is in an energy storage state; the voltage of the capacitor 1934 decreases with time, and the capacitor 1934 is in an energy release state to maintain the light emission of the LED module. When the switch 1935 is turned off, the inductor 1932 is in an energy release state, and the current of the inductor 1932 decreases with time. At this time, the current of the inductor 1932 returns to the inductor 1932 through the freewheeling diode 1933, the first drive output terminal 1521, the LED module and the second drive output terminal 1522 to form a freewheeling current. At this time, capacitor 1934 is in an energy storage state, and the voltage of capacitor 1934 increases over time.

[0307] It is worth noting that capacitor 1934 is an omissible component, which is indicated by a dotted line in the diagram. When capacitor 1934 is omitted, when the switching switch 1935 is turned on, the current of the inductor 1932 does not flow through the first driving output terminal 1521 and the second driving output terminal 1522, so that the LED module does not emit light. When the switching switch 1935 is turned off, the current of the inductor 1932 flows through the LED module through the freewheeling diode 1933, so that the LED module emits light. By controlling the light-emitting time of the LED module and the amount of current flowing through, the average brightness of the LED module can be stabilized at the set value, thereby achieving the same stable light-emitting effect.

[0308] From another perspective, the driving circuit 1930 keeps the current flowing through the LED module unchanged. Therefore, for some LED modules (e.g., white, red, blue, green, etc. LED modules), the situation where the color temperature changes with the current can be improved, that is, the LED module can maintain the color temperature unchanged at different brightness. The inductor 1932, which acts as a storage circuit, releases the stored energy when the switching switch 1935 is turned off, which makes the LED module continue to emit light on the one hand, and on the other hand, the current and voltage on the LED module will not drop to the minimum value. When the switching switch 1935 is turned on again, the current and voltage do not need to go back and forth from the minimum value to the maximum value, thereby avoiding the intermittent light emission of the LED module and improving the overall brightness of the LED module, reducing the minimum conduction period and increasing the driving frequency.

[0309] Cooperate Figure 5 and Figure 6The short circuit board 253 is divided into a first short circuit board and a second short circuit board connected to both ends of the long circuit board 251, and the electronic components in the power module are respectively arranged on the first short circuit board and the second short circuit board of the short circuit board 253. The lengths of the first short circuit board and the second short circuit board can be roughly the same or different. Generally, the first short circuit board ( Figure 5 The right side circuit board of the short circuit board 253 and Figure 6 The length dimension of the short circuit board 253 (the left circuit board) is 30% to 80% of the length dimension of the second short circuit board. A more preferred length dimension of the first short circuit board is 1 / 3 to 2 / 3 of the length dimension of the second short circuit board. In this embodiment, the length dimension of the first short circuit board is approximately half the size of the second short circuit board. The size of the second short circuit board is between 15mm and 65mm (depending on the application). The first short circuit board is arranged in the lamp holder at one end of the LED straight tube lamp, and the second short circuit board is arranged in the lamp holder at the opposite other end of the LED straight tube lamp.

[0310] For example, the capacitance of the driving circuit (eg: FIG. 12C to FIG. 12F The capacitors 1634, 1734, 1834, 1934) in the power module can be formed by connecting two or more capacitors in parallel in actual application. The capacitors of the drive circuit in the power module are at least partially or completely arranged on the first short circuit board of the short circuit board 253. That is, the rectifier circuit, the filter circuit, the inductor of the drive circuit, the controller, the switch, the diode, etc. are all arranged on the second short circuit board of the short circuit board 253. The inductor, the controller, the switch, etc. are components with higher temperatures in the electronic components. If they are arranged on different circuit boards from some or all of the capacitors, the capacitors (especially the electrolytic capacitors) can be prevented from being affected by the components with higher temperatures on the life of the capacitors, thereby improving the reliability of the capacitors. Furthermore, the EMI problem can be solved by spatially separating the capacitors from the rectifier circuit and the filter circuit.

[0311] As described above, the electronic components of the power module can be arranged on the lamp board or on the circuit board in the lamp holder. In order to increase the advantages of the power module, some of the capacitors in the embodiments will adopt chip capacitors (such as ceramic chip capacitors), which are arranged on the lamp board or on the circuit board in the lamp holder. However, the chip capacitors arranged in this way will emit obvious noise due to the piezoelectric effect during use, affecting the comfort of customers when using it. In order to solve this problem, in the LED straight tube lamp disclosed in the present invention, a suitable hole or groove can be arranged directly below the chip capacitor, which can change the vibration system formed by the chip capacitor and the circuit board carrying the chip capacitor under the piezoelectric effect so as to significantly reduce the noise emitted. The shape of the edge or periphery of this hole or groove can be approximately circular, elliptical or rectangular, for example, and is located in the conductive layer in the lamp board or the circuit board in the lamp holder, and below the chip capacitor.

[0312] See also Fig.13A , is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Figure 8C In the embodiment shown, the LED straight tube lamp of this embodiment includes a first rectifier circuit 510, a filter circuit 520 and an LED lighting module 530, and an overvoltage protection circuit 1570 is added. The overvoltage protection circuit 1570 is coupled to the first filter output terminal 521 and the second filter output terminal 522 to detect the filtered signal, and when the level of the filtered signal is higher than the set overvoltage value, the level of the filtered signal is clamped. Therefore, the overvoltage protection circuit 1570 can protect the components of the LED lighting module 530 from being damaged due to overvoltage.

[0313] See also Fig. 13B , is a circuit diagram of an overvoltage protection circuit according to an embodiment of the present invention. The overvoltage protection circuit 1670 includes a voltage regulator diode 1671, such as a Zener diode, coupled to the first filter output terminal 521 and the second filter output terminal 522. The voltage regulator diode 1671 is turned on when the voltage difference between the first filter output terminal 521 and the second filter output terminal 522 (i.e., the level of the filtered signal) reaches the breakdown voltage, so that the voltage difference is clamped at the breakdown voltage. The breakdown voltage is preferably in the range of 40-100V, and more preferably in the range of 55-75V.

[0314] See also Fig.14A , is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Figure 8C In the embodiment shown, the LED straight tube lamp of this embodiment includes a first rectifier circuit 510 and a filter circuit 520, and an auxiliary power module 2510 is added, wherein the power module of the LED straight tube lamp may also include some components of the LED lighting module 530. The auxiliary power module 2510 is coupled between the first filter output terminal 521 and the second filter output terminal 522. The auxiliary power module 2510 detects the filtered signals on the first filter output terminal 521 and the second filter output terminal 522, and determines whether to provide auxiliary power to the first filter output terminal 521 and the second filter output terminal 522 based on the detection results. When the filtered signal stops being provided or the AC level is insufficient, that is, when the driving voltage of the LED module is lower than an auxiliary voltage, the auxiliary power module 2510 provides auxiliary power so that the LED lighting module 530 can continue to emit light. The auxiliary voltage is determined based on an auxiliary power voltage of the auxiliary power module.

[0315] See also Fig. 14B , is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Fig.14AIn the embodiment shown, the LED straight tube lamp of this embodiment includes a first rectifier circuit 510, a filter circuit 520 and an auxiliary power module 2510, and the LED lighting module 530 further includes a drive circuit 1530 and an LED module 630. The auxiliary power module 2510 is coupled between the first drive output terminal 1521 and the second drive output terminal 1522. The auxiliary power module 2510 detects the drive signals of the first drive output terminal 1521 and the second drive output terminal 1522, and determines whether to provide auxiliary power to the first drive output terminal 1521 and the second drive output terminal 1522 based on the detection results. When the drive signal stops being provided or the AC level is insufficient, the auxiliary power module 2510 provides auxiliary power so that the LED module 630 can continue to emit light.

[0316] In another exemplary embodiment, the LED lighting module 530 or the LED module 630 may only receive the auxiliary power provided by the auxiliary power module 2510 as the working power supply, and the external driving signal is used to charge the auxiliary power module 2510. Since this embodiment only uses the auxiliary power provided by the auxiliary power module 2810 to light up the LED lighting module 530, that is, regardless of whether the external driving signal is provided by the AC power supply or by the ballast, the energy storage unit of the auxiliary power module 2810 is first charged, and then the energy storage unit supplies power to the back end. In this way, the LED straight tube lamp using the power module architecture of this embodiment can be compatible with the external driving signal provided by the AC power supply or the ballast.

[0317] From a structural point of view, since the auxiliary power module 2510 is connected between the output ends of the filter circuit 520 (the first filter output end 521 and the second filter output end 522) or the output ends of the drive circuit 1530 (the first drive output end 1521 and the second drive output end 1522), in one exemplary embodiment, its circuit can be placed in the lamp tube (for example, adjacent to the LED lighting module 530 or the LED module 630) to avoid power transmission loss caused by too long wiring. In another exemplary embodiment, the circuit of the auxiliary power module 2510 can also be placed in the lamp holder, so that the heat energy generated by the auxiliary power module 2510 during charging and discharging is less likely to affect the operation and luminous efficiency of the LED module. See Fig. 14C, is a circuit diagram of an auxiliary power module according to an embodiment of the present invention. The auxiliary power module 2610 of this embodiment can be applied to the configuration of the auxiliary power module 2510 described above. The auxiliary power module 2610 includes an energy storage unit 2613 and a voltage detection circuit 2614. The auxiliary power module 2610 also has an auxiliary power positive terminal 2611 and an auxiliary power negative terminal 2612 to couple the first filter output terminal 521 and the second filter output terminal 522 or the first drive output terminal 1521 and the second drive output terminal 1522 respectively. The voltage detection circuit 2614 detects the level of the signal on the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 to determine whether to release the power of the energy storage unit 2613 to the outside through the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612.

[0318] In this embodiment, the energy storage unit 2613 is a battery or a super capacitor. When the level of the signal at the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 is higher than the voltage of the energy storage unit 2613, the voltage detection circuit 2614 charges the energy storage unit 2613 with the signal at the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612. When the level of the signal at the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 is lower than the voltage of the energy storage unit 2613, the energy storage unit 2613 discharges to the outside through the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612.

[0319] The voltage detection circuit 2614 includes a diode 2615, a bipolar junction transistor 2616, and a resistor 2617. The anode of the diode 2615 is coupled to the anode of the energy storage unit 2613, and the cathode is coupled to the auxiliary power positive terminal 2611. The cathode of the energy storage unit 2613 is coupled to the auxiliary power negative terminal 2612. The collector of the bipolar junction transistor 2616 is coupled to the auxiliary power positive terminal 2611, and the emitter is coupled to the anode of the energy storage unit 2613. One end of the resistor 2617 is coupled to the auxiliary power positive terminal 2611, and the other end is coupled to the base of the bipolar junction transistor 2616. When the collector of the bipolar junction transistor 2616 is higher than the emitter by a conduction voltage, the resistor 2617 turns on the bipolar junction transistor 2616. When the power source driving the LED straight tube lamp is normal, the filtered signal charges the energy storage unit 2613 through the first filter output terminal 521 and the second filter output terminal 522 and the turned-on bipolar junction transistor 2616, or the driving signal charges the energy storage unit 2613 through the first driving output terminal 1521 and the second driving output terminal 1522 and the turned-on bipolar junction transistor 2616 until the collector-shoot difference of the bipolar junction transistor 2616 is equal to or less than the conduction voltage. When the filtered signal or the driving signal stops being provided or the level suddenly drops, the energy storage unit 2613 provides power to the LED lighting module 530 or the LED module 630 through the diode 2615 to maintain light emission.

[0320] It is worth noting that the maximum voltage stored in the energy storage unit 2613 when charging will be at least lower than the voltage applied to the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 by the conduction voltage of the bipolar junction transistor 2616. When the energy storage unit 2613 is discharged, the voltage output by the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 is lower than the voltage of the energy storage unit 2613 by the threshold voltage of the diode 2615. Therefore, when the auxiliary power module starts to supply power, the voltage provided will be lower (approximately equal to the sum of the threshold voltage of the diode 2615 and the conduction voltage of the bipolar junction transistor 2616). Fig. 14B In the embodiment shown, the voltage drop when the auxiliary power module supplies power will significantly reduce the brightness of the LED module 630. In this way, when the auxiliary power module is used in an emergency lighting system or a constant lighting system, the user can know that the main lighting power source, such as the mains, is abnormal and can take necessary preventive measures.

[0321] FIG. 14A to FIG. 14C In addition to being applicable to the emergency power supply of a single lamp tube, the configuration of the embodiment can also be applied to a lamp structure with multiple lamp tubes. Taking a lamp with four parallel-arranged LED straight tube lamps as an example, in an exemplary embodiment, one of the four LED straight tube lamps may include an auxiliary power module. When the external driving signal is abnormal, the LED straight tube lamp including the auxiliary power module will continue to be lit, while the other LED straight tube lamps will be turned off. Taking into account the uniformity of illumination, the LED straight tube lamp with the auxiliary power module may be arranged in the middle of the lamp.

[0322] In another exemplary embodiment, the four LED straight tube lamps may be multiple of which include auxiliary power modules. When the external driving signal is abnormal, the LED straight tube lamps including the auxiliary power modules can all be lit by the auxiliary power at the same time. In this way, even in an emergency situation, the lamp as a whole can still provide a certain brightness. Taking into account the uniformity of illumination, if two LED straight tube lamps including auxiliary power modules are set as an example, these two LED straight tube lamps can be staggered with the LED straight tube lamp that is not equipped with an auxiliary power module.

[0323] In another exemplary embodiment, the four LED straight tube lamps may include multiple auxiliary power modules. When the external driving signal is abnormal, some of the LED straight tube lamps will be illuminated by the auxiliary power first, and after a period of time (for example), the other part of the LED straight tube lamps will be illuminated by the auxiliary power. In this way, this embodiment can extend the lighting time of the LED straight tube lamp in an emergency state by coordinating with other lamps to provide auxiliary power sequence.

[0324] Among them, the embodiment of coordinating with other lamps to provide auxiliary power sequence can be achieved by setting the start-up time of the auxiliary power modules in different lamps, or by setting a controller in each lamp to communicate the operating status between the auxiliary power modules, and the present invention is not limited to this.

[0325] See also Fig.14D , Fig.14D Schematic diagram of the application circuit block of the power module of the LED straight tube lamp according to the embodiment of the present invention. The LED straight tube lamp of this embodiment includes a first rectifier circuit 510, a filter circuit 520, an LED lighting module 530 and an auxiliary power module 2710. The LED lighting module 530 of this embodiment may only include an LED module or include a drive circuit and an LED module, but the present invention is not limited thereto. Fig. 14B In the embodiment shown, the auxiliary power module 2710 of this embodiment is connected between the first pin 501 and the second pin 502 to receive an external driving signal and perform charging and discharging based on the external driving signal. The auxiliary power module 2710 includes an energy storage unit and a voltage detection circuit. The voltage detection circuit detects the external driving signal on the first pin 501 and the second pin 502, and determines whether to make the energy storage unit provide auxiliary power to the input end of the rectifier circuit 510 according to the detection result. When the external driving signal stops being provided or the AC level is insufficient, the energy storage unit of the auxiliary power module 2710 provides auxiliary power, so that the LED lighting module 530 can continue to emit light based on the auxiliary power provided by the auxiliary energy storage unit. In practical applications, the energy storage unit for providing auxiliary power can be implemented using energy storage components such as batteries or super capacitors, but the present invention is not limited thereto.

[0326] In an exemplary embodiment, the brightness of the LED module lit by the external driving signal is different from the brightness of the LED module lit by the auxiliary power. In this way, when the user observes the change in the brightness of the lamp tube, he can find that there may be an abnormality in the external power supply, so as to eliminate the problem as soon as possible. In other words, the auxiliary power module 2710 of this embodiment can provide auxiliary power with power different from the external driving signal to the LED module when the external driving signal is abnormal, so that the LED module has different brightness as an indication of whether the external driving signal is normally supplied. For example, in this embodiment, when the LED module is lit according to the external driving signal, its brightness can be, for example, 1600-2000 lumens; when the LED module is lit according to the auxiliary power provided by the auxiliary power module 2710, its brightness can be, for example, 200-250 lumens. From the perspective of the auxiliary power module 2710, in order to allow the LED module to have a brightness of 200-250 lumens when lit, the output power of the auxiliary power module 2710 can be, for example, 1 watt to 5 watts, but the present invention is not limited thereto. In addition, the capacity of the energy storage component in the auxiliary power module 2710 can be, for example, 1.5 watt-hours to 7.5 watt-hours or more, so that the LED module can be continuously lit at a brightness of 200-250 lumens for more than 90 minutes based on the auxiliary power, but the present invention is not limited to this.

[0327] From a structural point of view, Fig.14E As shown, Fig.14E Schematic diagram of the configuration of the auxiliary power module in the lamp tube according to an embodiment of the present invention. In this embodiment, the auxiliary power module 2710 can be configured in the lamp tube 1 as in the aforementioned embodiment, and can also be configured in the lamp holder 3. Under this configuration, the auxiliary power module 2710 can be connected to the corresponding first pin 501 and second pin 502 from the inside of the lamp holder 3 to receive the external driving signal provided to the first pin 501 and the second pin 502. Compared with the configuration of placing the auxiliary power module 2710 in the lamp tube 1, since the auxiliary power module 2710 of this embodiment is configured in the lamp holder 3 on both sides of the lamp tube 1, it will be farther away from the LED module in the lamp tube 1, so that the heat energy generated by the auxiliary power module 2710 during charging and discharging is less likely to affect the operation and luminous efficiency of the LED module.

[0328] In another embodiment, the auxiliary power module 2710 may also be disposed in a lamp holder corresponding to the LED straight tube lamp, such as Fig.14F As shown, Fig.14FSchematic diagram of the configuration of the auxiliary power module in the lamp holder according to an embodiment of the present invention. The lamp holder 1_LH includes a base 101_LH and a connecting socket 102_LH, wherein the base 101_LH is equipped with a power circuit and is suitable for locking / adhering to a fixed object such as a wall or ceiling. The connecting socket 102_LH has a slot corresponding to the pins on the LED straight tube lamp (such as the first pin 501 and the second pin 502), wherein the slot is electrically connected to the corresponding power circuit. In the present embodiment, the connecting socket 102_LH can be integrally formed with the base 101_LH, or can be detachably mounted on the base 101_LH, but the present invention is not limited thereto.

[0329] When the LED straight tube lamp is installed on the lamp holder 1_LH, the pins on the lamp heads 3 at both ends will be respectively inserted into the corresponding slots of the connection socket 102_LH, so as to be electrically connected to the corresponding power circuit, so that the external drive signal can be provided to the corresponding pins. In this embodiment, the auxiliary power module 2710 is arranged in the connection socket 102_LH, and connects the power circuit to receive the external drive signal. Taking the configuration of the left lamp head 3 as an example, when the first pin 501 and the second pin 502 are inserted into the slots of the left connection socket 102_LH, the auxiliary power module 2710 will electrically connect the first pin 501 and the second pin 502 through the slots, thereby realizing the following. Fig.14D connection configuration.

[0330] Compared to the embodiment in which the auxiliary power module 2710 is placed in the lamp holder 3, since the connection socket 102_LH can be designed as a detachable configuration, in an exemplary embodiment, the connection socket 102_LH and the auxiliary power module 2710 can be integrated into a modular configuration, so that when the auxiliary power module 2710 fails or its life is exhausted, a new auxiliary power module 2710 can be replaced by replacing the modular connection socket 102_LH for continued use without replacing the entire LED straight tube lamp. In other words, in addition to the advantage of reducing the impact of the heat generated by the auxiliary power module 2710 on the LED module, the configuration of this embodiment can also make the replacement of the auxiliary power module 2710 easier through a modular design, without having to replace the entire LED straight tube lamp due to a problem with the auxiliary power module 2710, thereby improving the durability of the LED straight tube lamp.

[0331] FIG. 14D to FIG. 14FIn addition to being applicable to the emergency power supply of a single lamp tube, the configuration of the embodiment can also be applied to a parallel architecture of multiple lamp tubes to provide emergency auxiliary power. Specifically, in an architecture of multiple LED straight tube lamps in parallel, the corresponding pins of each LED straight tube lamp will be connected in parallel to receive the same external drive signal. For example, the first pins 501 of each LED straight tube lamp will be connected in parallel, and the second pins of each LED straight tube lamp will be connected in parallel, and so on. Under this configuration, the auxiliary power module 2710 can be equivalent to being connected to the pins of each LED straight tube lamp in parallel. Therefore, as long as the output power of the auxiliary power module 2710 is sufficient to light up all parallel LED straight tube lamps, auxiliary power can be provided to light up all parallel LED straight tube lamps for emergency lighting when an abnormality occurs in the external power supply (that is, the external drive signal cannot be supplied normally). In actual applications, if the structure of 4 LED straight tube lamps in parallel is used as an example, the auxiliary power module 2710 can be designed as an energy storage unit with a capacity of 1.5 watt hours to 7.5 watt hours and an output power of 1 watt to 5 watts. Under this specification, when the auxiliary power module 2710 provides auxiliary power to light up the LED module, the overall lamp can have a brightness of at least 200-250 lumens and can be continuously lit for 90 minutes.

[0332] Under the multi-tube lighting structure, similar to FIG. 14A to FIG. 14C As described in the embodiment, the auxiliary power module can be set in one of the lamp tubes of the lamp, or in multiple lamp tubes of the lamp, wherein the lamp tube configuration method considering light uniformity is also applicable to the present embodiment. FIG. 14A to FIG. 14C The main difference of the embodiment in the application of a lamp structure with multiple lamps is that even if only a single lamp is provided with an auxiliary power module in the embodiment, the auxiliary power module can still be used to supply power to other lamps.

[0333] It should be noted here that although the description here is based on an example of a parallel structure of 4 LED straight tube lamps, those skilled in the art should be able to understand how to select a suitable energy storage unit to implement it under a parallel structure of 2, 3, or more than 4 LED straight tube lamps after referring to the above description. Therefore, as long as the auxiliary power module 2710 can simultaneously supply power to one or more of the multiple parallel LED straight tube lamps so that the corresponding LED straight tube lamp can respond to the auxiliary power and have a specific brightness, the implementation mode is within the scope described in this embodiment.

[0334] In another exemplary embodiment, Figures 14D to 14FThe auxiliary power modules 2510, 2610, and 2710 can further determine whether to provide auxiliary power to the LED straight tube lamp based on a lighting signal. Specifically, the lighting signal can be an indication signal that reflects the switching state of the light switch. For example, the level of the lighting signal is adjusted to a first level (e.g., a high logic level) or a second level different from the first level (e.g., a low logic level) according to the switching of the light switch. When the user switches the light switch to the lighting position, the lighting signal is adjusted to the first level; when the user switches the light switch to the off position, the lighting signal is adjusted to the second level. In other words, when the lighting signal is at the first level, the indicator light switch is switched to the lighting position; when the lighting signal is at the second level, the indicator light switch is switched to the off position. The generation of the lighting signal can be achieved by a circuit that detects the switching state of the light switch.

[0335] In another exemplary embodiment, the auxiliary power supply modules 2510, 2610, and 2710 may further include a lighting judgment circuit, which is used to receive a lighting signal and determine whether to allow the energy storage unit to supply power to the back end for use based on the level of the lighting signal and the detection result of the voltage detection circuit. Specifically, based on the level of the lighting signal and the detection result of the voltage detection circuit, there may be the following three states: (1) the lighting signal is at the first level and the external drive signal is normally provided; (2) the lighting signal is at the first level and the external drive signal stops being provided or the AC level is insufficient; and (3) the lighting signal is at the second level and the external drive signal stops being provided. Among them, state (1) is the situation where the user turns on the light switch and the external power supply is normal, state (2) is the situation where the user turns on the light switch but the external power supply is abnormal, and state (3) is the situation where the user turns on the light switch so that the external power supply stops being provided.

[0336] In this exemplary embodiment, both state (1) and state (3) are normal states, that is, the external power supply is normally provided when the user turns on the light, and the external power supply stops when the user turns off the light. Therefore, under state (1) and state (3), the auxiliary power module will not provide auxiliary power to the back end. More specifically, the lighting judgment circuit will stop the energy storage unit from supplying power to the back end based on the judgment results of state (1) and state (3). Among them, in state (1), the external drive signal is directly input to the rectifier circuit 510, and the external drive signal charges the energy storage unit; in state (3), the external drive signal stops being provided, so the energy storage unit is not charged.

[0337] In state (2), it means that the external power supply does not normally supply power to the LED straight tube lamp when the user turns on the light. Therefore, at this time, the lighting judgment circuit will allow the energy storage unit to supply power to the back end according to the judgment result of state (2), so that the LED lighting module 530 emits light based on the auxiliary power provided by the energy storage unit.

[0338] Based on this, under the application of the lighting judgment circuit, the LED lighting module 530 can have three different brightness changes. The first section is when the external power supply is normal, the LED lighting module 530 has a first brightness (e.g., 1600-2200 lumens), the second section is when the external power supply is not normal and is powered by auxiliary power, the LED lighting module 530 has a second brightness (e.g., 200-250 lumens), and the third section is when the user turns off the power by himself, so that the external power is not provided to the LED straight tube lamp, at this time the LED lighting module 530 has a third brightness (the LED module is not lit).

[0339] More specifically, with Fig. 15C According to the embodiment, the lighting judgment circuit can be, for example, a switch circuit (not shown) connected in series between the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612, and the control end of the switch circuit receives the lighting signal. When the lighting signal is at the first level, the switch circuit will react to the lighting signal and be turned on, and then when the external driving signal is normally supplied, the energy storage unit 2613 is charged through the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 (state 1); or when the external driving signal stops being provided or the AC level is insufficient, the energy storage unit 2613 provides auxiliary power to the rear-end LED lighting module 530 or LED module 630 through the auxiliary power positive terminal 2611 and the auxiliary power negative terminal 2612 (state 2). On the other hand, when the lighting signal is at the second level, the switch circuit will react to the lighting signal and be turned off. At this time, even if the external driving signal stops being provided or the AC level is insufficient, the energy storage unit 2613 will not provide auxiliary power to the rear end.

[0340] See also Figure 14G , Figure 14G Schematic diagram of the application circuit block of the power module of the LED straight tube lamp according to the embodiment of the present invention. The LED straight tube lamp of this embodiment includes a rectifier circuit 510', a filter circuit 520, an LED lighting module 530 and an auxiliary power module 2810. The LED lighting module 530 of this embodiment may only include an LED module or include a drive circuit and an LED module, but the present invention is not limited thereto. The rectifier circuit 510' may be, for example, Fig.9D The rectifier circuit 910 with three bridge arms is shown, wherein the rectifier circuit 510' has three input signal receiving terminals P1, P2 and P3. The input signal receiving terminal P1 is connected to the first pin 501, the input signal receiving terminal P2 is connected to the second pin 502 and the auxiliary power module 2810, and the input signal receiving terminal P3 is connected to the auxiliary power module 2810. The auxiliary power module 2810 of this embodiment can be, for example, an emergency ballast.

[0341] In this embodiment, the input signal receiving terminal P2 is a shared terminal of the external driving signal and the auxiliary power module 2810, wherein the external driving signal can be provided to the rectifier circuit 510' through the input signal receiving terminals P1 and P2, and the auxiliary power module 2810 can be provided to the rectifier circuit 510' through the signal receiving terminals P3 and P2. According to the configuration of this embodiment, when the external driving signal can supply power normally, the rectifier circuit 510' can perform full-wave rectification through the bridge arms corresponding to the signal receiving terminals P1 and P2, so as to supply power to the LED lighting module 530. When the external driving signal is abnormal, the rectifier circuit 510' can receive the auxiliary power through the signal receiving terminals P3 and P2, so as to supply power to the LED lighting module 530. Among them, the unidirectional conduction characteristic of the diode of the rectifier circuit 510' will isolate the input of the external driving signal and the auxiliary power, so that the two will not affect each other, and can also achieve the effect of providing auxiliary power when the external driving signal is abnormal. In addition, in practical applications, the rectifier circuit 510' can be implemented using a fast recovery diode to cope with the high frequency characteristics of the emergency ballast output current.

[0342] It should also be noted that the hardware configuration of the auxiliary power module 2810 of this embodiment can also refer to Fig.14E and 14F configuration, and the same beneficial effects can be obtained.

[0343] See also Fig.15A , is a schematic diagram of an application circuit block of a power module of an LED straight tube lamp according to an embodiment of the present invention. Figure 8CIn the embodiment shown, the LED straight tube lamp of this embodiment includes a first rectifier circuit 510, a filter circuit 520, and an installation detection module 2520 is added, wherein the power module may also include some components of the LED lighting module 530. The installation detection module 2520 is coupled to the first rectifier circuit 510 via the first installation detection terminal 2521, and is coupled to the filter circuit 520 via the second installation detection terminal 2522. The installation detection module 2520 detects the signal flowing through the first installation detection terminal 2521 and the second installation detection terminal 2522, and decides whether to cut off the external drive signal from flowing through the LED straight tube lamp based on the detection result. When the LED straight tube lamp has not been formally installed in the lamp holder, the installation detection module 2520 will detect a smaller current signal and determine that the signal flows through too high an impedance. At this time, the installation detection module 2520 is cut off to stop the operation of the LED straight tube lamp. If not, the installation detection module 2520 determines that the LED straight tube lamp is correctly installed on the lamp holder, and the installation detection module 2520 remains on to allow the LED straight tube lamp to operate normally. That is, when a current flowing through the first installation detection end and the second installation detection end is higher than or equal to an installation setting current (or a current value), the installation detection module determines that the LED straight tube lamp is correctly installed on the lamp holder and is turned on, so that the LED straight tube lamp operates in a conducting state; when a current flowing through the first installation detection end and the second installation detection end is lower than the installation setting current (or current value), the installation detection module determines that the LED straight tube lamp is not correctly installed on the lamp holder and is cut off, so that the LED straight tube lamp enters a non-conducting state. In other words, the installation detection module 2520 determines conduction or cutoff based on the detected impedance, so that the LED straight tube lamp operates in a conducting state or enters a non-conducting state. Thereby, the problem of the user being electrocuted due to accidentally touching the conductive part of the LED straight tube lamp when the LED straight tube lamp has not been correctly installed in the lamp holder can be avoided.

[0344] In another exemplary embodiment, because when a human body touches the lamp, the impedance of the human body will cause the equivalent impedance of the power circuit to change, the installation detection module 2520 can determine whether the user touches the lamp by detecting the voltage change on the power circuit, which can also achieve the above-mentioned anti-electric shock function. In other words, in the embodiment of the present invention, the installation detection module 2520 can determine whether the lamp is correctly installed and whether the user accidentally touches the conductive part of the lamp when the lamp is not correctly installed by detecting electrical signals (including voltage or current).

[0345] See also Fig. 15B, is a circuit diagram of an installation detection module according to an embodiment of the present invention. The installation detection module includes a switch circuit 2580, a detection pulse generating module 2540, a detection result latch circuit 2560, and a detection determination circuit 2570. The detection determination circuit 2570 is coupled to the first installation detection terminal 2521 and the second installation detection terminal 2522 (via a switch coupling terminal 2581 and a switch circuit 2580) to detect the signal between the first installation detection terminal 2521 and the second installation detection terminal 2522. The detection determination circuit 2570 is also coupled to the detection result latch circuit 2560 via the detection result terminal 2571 to transmit the detection result signal to the detection result latch circuit 2560 via the detection result terminal 2571. The detection pulse generating module 2540 is coupled to the detection result latch circuit 2560 via the pulse signal output terminal 2541. The detection result latch circuit 2560 latches the detection result according to the detection result signal (or the detection result signal and the pulse signal), and is coupled to the switch circuit 2580 via the detection result latch terminal 2561 to transmit or reflect the detection result to the switch circuit 2580. The switch circuit 2580 determines whether to conduct or cut off between the first installation detection terminal 2521 and the second installation detection terminal 2522 according to the detection result.

[0346] See also Fig. 15C, is a circuit diagram of a detection pulse generating module according to an embodiment of the present invention. The detection pulse generating module 2640 includes a capacitor 2642 (or a first capacitor), 2645 (or a second capacitor) and 2646 (or a third capacitor), a resistor 2643 (or a first resistor), 2647 (or a second resistor) and 2648 (or a third resistor), a buffer 2644 (or a first buffer) and 2651 (or a second buffer), an inverter 2650, a diode 2649 (or a first diode) and an OR gate 2652 (or a first OR gate). In use or operation, the capacitor 2642 and the resistor 2643 are connected in series between a driving voltage (for example, VCC, and is often set to a high level) and a reference potential (here, the ground potential is used as an example), and their connection point is coupled to the input end of the buffer 2644. Resistor 2647 is coupled to a driving voltage (which may be referred to as VCC) and the input terminal of inverter 2650. Resistor 2648 is coupled between the input terminal of buffer 2651 and a reference potential (here, the potential of the ground is used as an example). The positive end of the diode is grounded, and the negative end is also coupled to the input terminal of buffer 2651. One end of capacitor 2645 and one end of 2646 are commonly coupled to the output terminal of buffer 2644, the other end of capacitor 2645 is connected to the input terminal of inverter 2650, and the other end of capacitor 2646 is coupled to the input terminal of buffer 2651. The output terminal of inverter 2650 and the output terminal of buffer 2651 are coupled to the input terminal of OR gate 2652. It should be noted that in this specification, the "high level" and "low level" of the potential are relative to another potential in the circuit or a reference potential (sometimes described as "high level" and "low level"), and can also be referred to as "logical high level" and "logical low level" respectively.

[0347] When one end of the LED straight tube lamp is inserted into the lamp holder and the other end of the lamp holder is electrically in contact with the human body or the double-end lamp holders of the LED straight tube lamp are both inserted into the lamp holder, the LED straight tube lamp is powered on. At this time, the installation detection module enters the detection stage. The voltage at the connection point between the capacitor 2642 and the resistor 2643 is high at the beginning (equal to the driving voltage VCC), and then gradually decreases over time and finally drops to zero. The input end of the buffer 2644 is coupled to the connection point between the capacitor 2642 and the resistor 2643, so a high-level signal is output at the beginning, and when the voltage at the connection point between the capacitor 2642 and the resistor 2643 drops to a low logic judgment level, it is converted into a low-level signal. That is, the buffer 2644 generates an input pulse signal, and then continues to maintain a low level (stop outputting the input pulse signal). The pulse width of the input pulse signal is equal to an (initially set) time period, and the time period is determined by the capacitance of the capacitor 2642 and the resistance of the resistor 2643.

[0348] Next, the operation of setting the time period for the pulse signal generated by the buffer 2644 is described. Since one end of the capacitor 2645 and the resistor 2647 are both equal to the driving voltage VCC, the connection end of the capacitor 2645 and the resistor 2647 is also at a high level. In addition, one end of the resistor 2648 is grounded, and one end of the capacitor 2646 receives the pulse signal of the buffer 2644. Therefore, the connection end of the capacitor 2646 and the resistor 2648 is at a high level at the beginning, and then gradually decreases to zero over time (at the same time, the capacitor stores a voltage equal to or close to the driving voltage VCC). Therefore, the inverter 2650 outputs a low level signal, and the buffer 2651 outputs a high level signal, so that the OR gate 2652 outputs a high level signal (the first pulse signal) at the pulse signal output end 2541. At this time, the detection result latch circuit 2560 latches the detection result for the first time according to the detection result signal and the pulse signal. When the potential at the connection terminal of capacitor 2646 and resistor 2648 drops to a low logic level, buffer 2651 switches to outputting a low level signal, and OR gate 2652 outputs a low level signal (stops outputting the first pulse signal) at pulse signal output terminal 2541. The pulse width of the pulse signal output by OR gate 2652 is determined by the capacitance of capacitor 2646 and the resistance of resistor 2648.

[0349] Next, the operation after the buffer 2644 stops outputting the pulse signal, i.e., the operation entering the operation phase, is described. Since the capacitor 2646 stores a voltage close to the driving voltage VCC, at the moment when the output of the buffer 2644 changes from a high level to a low level, the potential at the connection end of the capacitor 2646 and the resistor 2648 will be lower than zero, and the potential at the connection end will be pulled back to zero by the diode 2649 to quickly charge the capacitor. Therefore, the buffer 2651 still maintains the output of the low-level signal.

[0350] On the other hand, at the moment when the output of the buffer 2644 changes from a high level to a low level, the level of one end of the capacitor 2645 drops from the driving voltage VCC to zero instantly, so that the connection end of the capacitor 2645 and the resistor 2647 is at a low level. The output signal of the inverter 2650 changes to a high level, and the OR gate outputs a high level (a second pulse signal). At this time, the detection result latch circuit 2560 latches the detection result for the second time according to the detection result signal and the pulse signal. Then, the resistor 2647 charges the capacitor 2645, so that the level of the connection end of the capacitor 2645 and the resistor 2647 gradually rises over time to equal the driving voltage VCC. When the level of the connection end of the capacitor 2645 and the resistor 2647 rises to a high logic judgment level, the inverter 2650 outputs a low level again, and the OR gate 2652 stops outputting the second pulse signal. The pulse width of the second pulse signal is determined by the capacitance of the capacitor 2645 and the resistance of the resistor 2647.

[0351] As described above, the detection pulse generating module 2640 will generate two high-level pulse signals - a first pulse signal and a second pulse signal - during the detection stage, which are outputted from the pulse signal output terminal 2541, and there is a set time interval between the first pulse signal and the second pulse signal. The set time interval is mainly determined by the capacitance of the capacitor 2642 and the resistance of the resistor 2643.

[0352] After the detection phase, the operation phase is entered, and the detection pulse generating module 2640 no longer generates a pulse signal, and maintains the pulse signal output terminal 2541 at a low level.

[0353] See also Fig.15D , is a circuit diagram of a detection and determination circuit according to an embodiment of the present invention. The detection and determination circuit 2670 includes a comparator 2671 (or a first comparator) and a resistor 2672 (or a fifth resistor). The inverting terminal of the comparator 2671 receives the reference level signal Vref, and the non-inverting terminal is grounded through the resistor 2672 and coupled to the switch coupling terminal 2581 at the same time. Please also refer to Fig.15A , the signal flowing into the switch circuit 2580 from the first installation detection terminal 2521 will be output through the switch coupling terminal 2581 and flow through the resistor 2672. When the current flowing through the resistor 2672 is too large (i.e., higher than or equal to the installation setting current, for example: the current value is 2A) and the level on the resistor 2672 is higher than the level of the reference level signal Vref (which may correspond to the two lamp holders being correctly inserted into the lamp holder), the comparator 2671 generates a high-level detection result signal and outputs it from the detection result terminal 2571. For example, when the LED straight tube lamp is correctly installed in the lamp holder, the comparator 2671 will output a high-level detection result signal at the detection result terminal 2571. When the current flowing through the resistor 2672 is insufficient to make the level on the resistor 2672 higher than the level of the reference level signal Vref (which may correspond to only one of the lamp holders being correctly inserted into the lamp holder), the comparator 2671 generates a low-level detection result signal and outputs it from the detection result terminal 2571. For example, when the LED straight tube lamp is not correctly installed in the lamp holder, or one end is installed in the lamp holder and the other end is grounded through the human body, the current will be too small and the comparator 2671 will output a low-level detection result signal at the detection result end 2571.

[0354] See also Fig.15E, is a circuit diagram of a detection result latch circuit according to an embodiment of the present invention. The detection result latch circuit 2660 includes a D-type flip-flop (D Flip-flop) 2661 (or a first D-type flip-flop), a resistor 2662 (or a fourth resistor), and an OR gate 2663 (or a second OR gate). The clock input terminal (CLK) of the D-type flip-flop 2661 is coupled to the detection result terminal 2571, and the input terminal D is coupled to the driving voltage VCC. When the detection result terminal 2571 outputs a low-level detection result signal, the D-type flip-flop 2661 outputs a low-level signal at the output terminal Q; when the detection result terminal 2571 outputs a high-level detection result signal, the D-type flip-flop 2661 outputs a high-level signal at the output terminal Q. The resistor 2662 is coupled between the output terminal Q of the D-type flip-flop 2661 and a reference potential (e.g., a ground potential). When the OR gate 2663 receives the first pulse signal or the second pulse signal outputted from the pulse signal output terminal 2541, or the high level signal outputted from the output terminal Q by the D-type flip-flop 2661, a high level detection result latch signal is outputted from the detection result latch terminal 2561. Since the detection pulse generating module 2640 only outputs the first pulse signal or the second pulse signal in the detection phase, the OR gate 2663 is led to output the high level detection result latch signal, and the rest of the time (including the operation phase after the detection phase) is led by the D-type flip-flop 2661 to make the detection result latch signal high level or low level. Therefore, when the detection result terminal 2571 does not have a detection result signal with a high level, the D-type flip-flop 2661 maintains a low level signal at the output terminal Q, so that the detection result latch terminal 2561 also maintains a low level detection result latch signal in the operation phase. On the contrary, once the detection result terminal 2571 has a detection result signal of too high level, the D-type flip-flop 2661 will latch and maintain a high level signal at the output terminal Q. Thus, the detection result latch terminal 2561 also maintains a high level detection result latch signal when entering the operation phase.

[0355] See also Fig.15F, is a circuit diagram of a switch circuit according to an embodiment of the present invention. The switch circuit 2680 may include a transistor, such as a bipolar junction transistor 2681 (or a first transistor) as a power transistor. Power transistors can handle high current and power, and are particularly used in switch circuits. The collector of the bipolar junction transistor 2681 is coupled to the first installation detection terminal 2521, the base is coupled to the detection result latch terminal 2561, and the emitter is coupled to the switch terminal 2581. When the detection pulse generation module 2640 generates a first pulse signal or a second pulse signal, the bipolar junction transistor 2681 will be turned on briefly, allowing the detection determination circuit 2670 to perform detection to determine whether the detection result latch signal is a high level or a low level. When the detection result latch circuit 2660 outputs a high-level detection result latch signal at the detection result latch terminal 2561, the bipolar junction transistor 2681 is turned on to connect the first installation detection terminal 2521 and the second installation detection terminal 2522. When the detection result latch circuit 2660 outputs a low-level detection result latch signal at the detection result latch terminal 2561, the bipolar junction transistor 2681 is turned off to disconnect the first installation detection terminal 2521 and the second installation detection terminal 2522.

[0356] Since the external drive signal is an AC signal, in order to avoid the detection error caused by the level of the external drive signal being just near the zero point when the detection and determination circuit 2670 detects. Therefore, the detection pulse generating module 2640 generates the first pulse signal and the second pulse signal so that the detection and determination circuit 2670 detects twice, so as to avoid the problem that the level of the external drive signal is just near the zero point during a single detection. Preferably, the generation time difference of the first pulse signal and the second pulse signal is not an integer multiple of half the cycle of the external drive signal, that is, it is not an integer multiple of the 180-degree phase difference corresponding to the external drive signal. In this way, when one of the first pulse signal and the second pulse signal is generated, if the external drive signal is unfortunately near the zero point, the external drive signal can be avoided from being near the zero point when the other is generated.

[0357] The generation time difference between the first pulse signal and the second pulse signal, i.e., the set time interval, can be expressed by the following formula:

[0358] Set time interval = (X + Y) (T / 2)

[0359] Where T is the period of the external driving signal, X is an integer greater than or equal to zero, 0 <Y<1。

[0360] The preferred range of Y is between 0.05-0.95, and more preferably between 0.15-0.85.

[0361] Furthermore, in order to avoid the installation detection module entering the detection phase, the driving voltage VCC level is too low, which will cause the circuit logic judgment error of the installation detection module to start rising, the generation of the first pulse signal can be set to be generated when the driving voltage VCC reaches or exceeds a predetermined level, so that the detection and determination circuit 2670 is performed only after the driving voltage VCC reaches a sufficient level, so as to avoid the circuit logic judgment error of the installation detection module caused by insufficient level.

[0362] According to the above description, when one end of the LED straight tube lamp is inserted into the lamp holder and the other end is floating or electrically in contact with the human body, the detection and judgment circuit outputs a low-level detection result signal due to the large impedance. The detection result latch circuit latches the low-level detection result signal into a low-level detection result latch signal according to the pulse signal of the detection pulse generating module, and maintains the detection result during the operation stage. In this way, the switch circuit can be kept cut off to avoid continuous power-on. This can also avoid the possibility of electric shock to the human body, thereby meeting the requirements of safety regulations. When the two end lamp holders of the LED straight tube lamp are correctly inserted into the lamp holder, the detection and judgment circuit outputs a high-level detection result signal due to the small impedance of the LED straight tube lamp's own circuit. The detection result latch circuit latches the high-level detection result signal into a high-level detection result latch signal according to the pulse signal of the detection pulse generating module, and maintains the detection result during the operation stage. In this way, the switch circuit can be kept turned on and continuously powered, so that the LED straight tube lamp can operate normally during the operation stage.

[0363] In other words, in some embodiments, when the lamp holder at one end of the LED straight tube lamp is inserted into the lamp holder and the lamp holder at the other end is floating or electrically in contact with the human body, the detection and determination circuit inputs the low-level detection result signal to the detection result latch circuit, and then the detection pulse generation module outputs a low-level signal to the detection result latch circuit, so that the detection result latch circuit outputs a low-level detection result latch signal to turn off the switch circuit, wherein the turning off of the switch circuit turns off the first installation detection end and the second installation detection end, that is, the LED straight tube lamp enters a non-conducting state.

[0364] In some embodiments, when the two lamp heads of the LED straight tube lamp are correctly inserted into the lamp holder, the detection and determination circuit inputs the high-level detection result signal to the detection result latch circuit, so that the detection result latch circuit outputs a high-level detection result latch signal to turn on the switch circuit, wherein the conduction of the switch circuit causes conduction between the first installation detection end and the second installation detection end, that is, the LED straight tube lamp is operated in a conduction state.

[0365] It is worth noting that the pulse width of the pulse signal generated by the detection pulse generating module is between 10us and 1ms, and its function is only to use this pulse signal to turn on the switch circuit for a short time when the LED straight tube lamp is powered on. In this way, a pulse current can be generated, flowing through the detection and judgment circuit for detection and judgment. Because a short-term pulse is generated and the long-term conduction is non-conductive, it does not cause the risk of electric shock. Furthermore, the detection result latch circuit also maintains the detection result during the operation stage, and the previously latched detection result will no longer be changed due to changes in the circuit state, thereby avoiding problems caused by changes in the detection result. The installation detection module (i.e., the switch circuit, the detection pulse generating module, the detection result latch circuit, and the detection judgment circuit) can be integrated into the chip, so that it can be embedded in the circuit, which can save the circuit cost and volume of the installation detection module.

[0366] Although the applicant has proposed in previous cases, such as CN106015996A, to use a detection pulse generating module to generate a first pulse signal and a second pulse signal so that the detection judgment circuit can perform detection judgment, the applicant has made further improvements to the implementation method of the scheme during implementation, aiming to reduce the size of the detection module and further improve the accuracy of the detection judgment. The following is a detailed description of the improved implementation method.

[0367] See also Figure 15G , is a circuit diagram of the installation detection module according to an embodiment of the present invention. The installation detection module includes a detection pulse generating module 2740, a detection result latch circuit 2760, a switch circuit 2780 and a detection determination circuit 2770. Among them, the detection pulse generating module 2740 is electrically connected to the detection result latch circuit 2760 to generate at least one pulse signal. The detection result latch circuit 2760 is electrically connected to the switch circuit 2780 to receive and output the pulse signal output by the detection pulse generating module 2740. The switch circuit 2780 is electrically connected to one end of the LED straight tube lamp power supply circuit and the detection determination circuit 2770 respectively, to receive the pulse signal output by the detection result latch circuit 2760 and to be turned on during this pulse signal, so that the LED straight tube lamp power supply circuit is turned on. The detection and determination circuit 2770 is electrically connected to the switch circuit 2780, the other end of the LED straight tube lamp power circuit and the detection result latch circuit 2760, so as to detect the sampling signal on the power circuit when the switch circuit 2780 and the LED power circuit are turned on to determine the installation status of the LED straight tube lamp and the lamp holder.

[0368] In other words, the power circuit of this embodiment is used as a detection path for installing the detection module. Among them, the detection determination circuit 2770 further transmits the detection result to the detection result latch circuit 2760 for further control; in addition, the detection pulse generation module 2740 is also electrically connected to the output of the detection result latch circuit 2760 to control the time of the cut-off pulse signal. The detailed circuit architecture and the overall circuit operation will be described below.

[0369] In some embodiments, the detection pulse generation module 2740 generates a pulse signal (i.e., a narrow pulse) via the detection result latch circuit 2760 so that the switch circuit 2780 operates in an on state during the pulse period. At the same time, the power supply circuit of the LED straight tube lamp located between the detection terminals 2521 and 2522 is also turned on at the same time. The detection determination circuit 2770 detects a sampling signal on the power supply circuit, and feeds back the signal detected based on the sampling signal to the detection result latch circuit 2760. For example, the detection determination circuit 2770 may be a circuit that can generate an output level for controlling a latch circuit, wherein the output level of the latch circuit corresponds to the on / off state of the LED straight tube lamp. The detection result latch circuit 2760 stores the detection result based on the detection result signal (or the detection result signal and the pulse signal), and transmits or provides the detection result to the switch circuit 2780. After receiving the detection result transmitted by the detection result latch circuit 2760, the switch circuit 2780 controls the conduction state between the installation detection terminals 2521 and 2522 according to the detection result. That is, when the set threshold is reached, the detection result latch circuit 2760 locks the detection result and transmits or provides the detection result to the switch circuit 2780, and the installation detection terminals 2521 and 2522 are connected. Before the installation detection terminals 2521 and 2522 are not connected, the detection pulse generation module sends pulse signals at intervals.

[0370] See also Fig.15H, is a schematic diagram of a detection pulse generating module according to an embodiment of the present invention. The detection pulse generating module 2740 includes: a resistor 2742 (sixth resistor), one end of which is connected to a driving voltage; a capacitor 2743 (fourth capacitor), one end of which is connected to the other end of the resistor 2742, and the other end of the capacitor 2743 is grounded; a Schmitt trigger 2744, having an input end and an output end, the input end is connected to the connection end of the resistor 2742 and the capacitor 2743, and the output end is connected to the detection result latch circuit 2760; a resistor 2745 (seventh resistor), one end of which is connected to the connection end of the resistor 2742 and the capacitor 2743; a transistor 2746 (second transistor), having a base end, a collector end and an emitter end, the collector end is connected to the other end of the resistor 2745, and the emitter end is grounded; and a resistor 2747 (eighth resistor), one end of which is connected to the base end of the transistor 2746, and the other end of the resistor 2747 is connected to the detection result latch circuit 2760 and the switch circuit 2780. The detection pulse generating module 2740 further includes a Zener diode 2748 having an anode terminal and a cathode terminal. The anode terminal is connected to the other end of the capacitor 2743 and grounded, and the cathode terminal is connected to one end of the capacitor 2743 and the resistor 2742 .

[0371] See also Fig.15I , is a schematic diagram of a detection result latch circuit according to an embodiment of the present invention. The detection result latch circuit 2760 includes: a D-type flip-flop 2762 (a second D-type flip-flop), having a data input terminal, a frequency input terminal and an output terminal, the data input terminal is connected to the driving voltage, and the frequency input terminal is connected to the detection determination circuit 2770; and an OR gate 2763 (a third OR gate), having a first input terminal, a second input terminal and an output terminal, the first input terminal is connected to the output terminal of the Schmitt trigger 2744, the second input terminal is connected to the output terminal of the D-type flip-flop 2762, and the output terminal of the OR gate 2763 is connected to the other end of the resistor 2747 and the switch circuit 2780.

[0372] See also Fig.15J , is a schematic diagram of a switch circuit according to an embodiment of the present invention. The switch circuit 2780 includes: a transistor 2782 (third transistor), having a base terminal, a collector terminal and an emitter terminal, the base terminal is connected to the output terminal of the OR gate 2763, the collector terminal is connected to one end of the LED power supply circuit (for example: the first installation detection terminal 2521), and the emitter terminal is connected to the detection and determination circuit 2770. Among them, the transistor 2782 can also be replaced by other equivalent components of electronic switches, such as: MOSFET, etc.

[0373] See also Figure 15K, is a schematic diagram of a detection and determination circuit according to an embodiment of the present invention. The detection and determination circuit 2770 includes: a resistor 2774 (ninth resistor), one end of which is connected to the emitter end of the transistor 2782, and the other end of the resistor 2774 is connected to the other end of the LED power supply circuit (for example: the second installation detection end 2522); a diode 2775 (second diode), having an anode end and a cathode end, the anode end is connected to one end of the resistor 2744; a comparator 2772 (second comparator), having a first input end, a second input end and an output end, the first input end is connected to a setting signal (for example: a reference voltage Vref, which is 1.3V in this embodiment, but is not limited thereto), the second input end is connected to the cathode end of the diode 2775, and the output end of the comparator 2772 is connected to a D-type trigger The frequency input terminal of D-type flip-flop 2762; a comparator 2773 (third comparator) having a first input terminal, a second input terminal and an output terminal, the first input terminal is connected to the cathode terminal of diode 2775, the second input terminal is connected to another setting signal (for example: another reference voltage Vref, which is 0.3V in this embodiment, but not limited to this), and the output terminal of the comparator is connected to the frequency input terminal of D-type flip-flop 2762; a resistor 2776 (tenth resistor) having one end connected to the driving voltage; a resistor 2777 (eleventh resistor) having one end connected to the other end of resistor 2776 and the second input terminal of comparator 2772, and the other end of resistor 2777 is grounded; and a capacitor 2778 (fifth capacitor) connected in parallel with resistor 2777. In some embodiments, the diode 2775, the comparator 2773, the resistor 2776, the resistor 2777 and the capacitor 2778 can be omitted. When the diode 2775 is omitted, the second input end of the comparator 2772 is directly connected to one end of the resistor 2774. In some embodiments, based on power factor considerations, the resistor 2774 can be two resistors in parallel, and the equivalent resistance value is between 0.1 ohms and 5 ohms.

[0374] It is worth noting that part of the circuit of the detection module can be integrated into an integrated circuit, thereby saving the circuit cost and volume of the detection module. For example, the Schmitt trigger 2744 of the detection pulse generation module 2740, the detection result latch circuit 2760 and the two comparators 2772 and 2773 of the detection determination circuit 2770 are integrated into an integrated circuit, but the present invention is not limited to this.

[0375] Next, the overall circuit operation of the installed detection module will be explained. First of all, it should be explained that this solution uses the principle that the capacitor voltage will not change suddenly; before the power circuit is turned on, the voltage at both ends of the capacitor in the LED straight tube lamp power circuit is zero and the transient response is in a short-circuit state; and when the power circuit is correctly installed in the lamp holder of the LED straight tube lamp, its transient response current limiting resistance is small and the response peak current is large, and when the power circuit is not correctly installed in the lamp holder of the LED straight tube lamp, its transient response current limiting resistance is large and the response peak current is small. The leakage current of the LED straight tube lamp is less than 5MIU. The following will compare the current of an embodiment when the LED straight tube lamp is working normally (that is, the lamp holders at both ends of the LED straight tube lamp are correctly installed in the lamp holder) and during the lamp replacement test (that is, the lamp holder at one end of the LED straight tube lamp is installed in the lamp holder and the lamp holder at the other end is in contact with the human body):

[0376]

[0377] Among them, in the denominator, Rfuse is the fuse resistance of the LED straight tube lamp (10 ohms), and 500 ohms is the resistance value that simulates the conductive characteristics of the human body in transient response; and in the numerator, the maximum voltage value (305*1.414) of the voltage root mean square value of 90V to 305V and the minimum voltage difference of 50V are taken. From the above embodiments, it can be known that if the lamp holders at both ends of the LED straight tube lamp are correctly installed in the lamp holder, the minimum transient current during normal operation is 5A; but when the lamp holder at one end of the LED straight tube lamp is installed in the lamp holder and the lamp holder at the other end contacts the human body, the maximum transient current is only 845mA. Therefore, the present invention utilizes the current that can flow through the capacitor in the LED power supply circuit (e.g., the filter capacitor of the filter circuit) through transient response to detect the installation status of the LED straight tube lamp and the lamp holder, that is, to detect whether the LED straight tube lamp is correctly installed in the lamp holder, and when the LED straight tube lamp is not correctly installed in the lamp holder, a protection mechanism is provided to prevent the user from accidentally touching the conductive part of the LED straight tube lamp and getting an electric shock. The above embodiments are only used to illustrate the present invention and are not used to limit the implementation of the present invention.

[0378] Next, please see again Figure 15GWhen the LED straight tube lamp is replaced in the lamp holder, the output of the detection pulse generating module 2740 rises from a first low level voltage to a first high level voltage in a period of time (this period of time determines the pulse period), and outputs the first high level voltage to the detection result latch circuit 2760 through a path 2741. After receiving the first high level voltage, the detection result latch circuit 2760 simultaneously outputs a second high level voltage to the switch circuit 2780 and the detection pulse generating module 2740 through a path 2761. When the switch circuit 2780 receives this second high-level voltage, the switch circuit 2780 is turned on so that a power supply circuit of the LED straight tube lamp (at least including the first installation detection end 2521, the switch circuit 2780, the path 2781, the detection and judgment circuit 2770 and the second installation detection end 2522) is turned on; and at the same time, the detection pulse generating module 2740 receives the second high-level voltage returned by the detection result latch circuit 2760 for a period of time (this period of time determines the pulse width), and its output drops from the first high-level voltage back to the first low-level voltage (the first low-level voltage, the first high-level voltage and the second first low-level voltage constitute a first pulse signal). When the power circuit of the LED straight tube lamp is turned on, the detection and determination circuit 2770 detects a first sampling signal (e.g., voltage signal) on the circuit. When the first sampling signal is greater than and / or equal to a setting signal (e.g., a reference voltage), according to the application principle of the above-mentioned present solution, it indicates that the LED straight tube lamp is correctly installed in the lamp holder. Therefore, the detection and determination circuit 2770 outputs a third high-level voltage (first high-level signal) to the detection result latch circuit 2760 via a path 2771. The detection result latch circuit 2760 receives the third high-level voltage and then outputs and maintains a second high-level voltage (second high-level signal) to the switch circuit 2780. The switch circuit 2780 receives the second high-level voltage and then remains turned on to keep the power circuit of the LED straight tube lamp turned on. During this period, the detection pulse generation module 2740 no longer generates pulse outputs.

[0379] When the first sampling signal is less than the setting signal, according to the application principle of the present invention, it indicates that the LED straight tube lamp has not been correctly installed in the lamp holder, so the detection and determination circuit 2770 outputs a third low-level voltage (first low-level signal) to the detection result latch circuit 2760. The detection result latch circuit 2760 receives the third low-level voltage and then outputs and maintains the second low-level voltage (second low-level signal) to the switch circuit 2780. The switch circuit 2780 receives the second low-level voltage and then maintains cutoff to keep the power supply circuit of the LED straight tube lamp open. In this case, the problem of electric shock caused by the user accidentally touching the conductive part of the LED straight tube lamp when the LED straight tube lamp has not been correctly installed in the lamp holder is avoided.

[0380] When the power circuit of the LED straight tube lamp remains open for a period of time (i.e., the pulse cycle time), the output of the detection pulse generating module 2740 rises from the first low-level voltage to the first high-level voltage again, and is output to the detection result latch circuit 2760 via the path 2741. After receiving the first high-level voltage, the detection result latch circuit 2760 simultaneously outputs a second high-level voltage to the switch circuit 2780 and the detection pulse generating module 2740 via the path 2761. After the switch circuit 2780 receives this second high-level voltage, the switch circuit 2780 is turned on again so that the power supply circuit of the LED straight tube lamp (at least including the first installation detection end 2521, the switch circuit 2780, the path 2781, the detection and judgment circuit 2770 and the second installation detection end 2522) is also turned on again; at the same time, the detection pulse generating module 2740 receives the second high-level voltage returned by the detection result latch circuit 2760 for a period of time (this period of time determines the pulse width). Its output drops from the first high-level voltage back to a first low-level voltage (the third first low-level voltage, the second first high-level voltage and the fourth first low-level voltage constitute a second pulse signal). When the power circuit of the LED straight tube lamp is turned on again, the detection and determination circuit 2770 also detects a second sampling signal (e.g., voltage signal) on the circuit again. When the second sampling signal is greater than and / or equal to the setting signal (e.g., a reference voltage), according to the application principle of the present invention, it indicates that the LED straight tube lamp is correctly installed in the lamp holder. Therefore, the detection and determination circuit 2770 outputs a third high-level voltage (first high-level signal) to the detection result latch circuit 2760 via the path 2771. The detection result latch circuit 2760 receives the third high-level voltage and then outputs and maintains a second high-level voltage (second high-level signal) to the switch circuit 2780. The switch circuit 2780 receives the second high-level voltage and then remains turned on to keep the power circuit of the LED straight tube lamp turned on. During this period, the detection pulse generation module 2740 no longer generates a pulse output.

[0381] When the second sampling signal is less than the setting signal, according to the application principle of the present invention, it indicates that the LED straight tube lamp is not correctly installed in the lamp holder, so the detection and determination circuit 2770 outputs a third low-level voltage (first low-level signal) to the detection result latch circuit 2760. The detection result latch circuit 2760 receives the third low-level voltage and then outputs and maintains a second low-level voltage (second low-level signal) to the switch circuit 2780. The switch circuit 2780 receives the second low-level voltage and then remains cut off so that the power supply circuit of the LED straight tube lamp remains open.

[0382] Next, please also refer to FIG. 15H to FIG. 15KWhen the LED straight tube lamp is replaced in the lamp holder, a driving voltage charges the capacitor 2743 via the resistor 2742, and when the voltage of the capacitor 2743 rises to a level sufficient to trigger the Schmitt trigger 2744, the Schmitt trigger 2744 changes from an initial first low-level voltage to a first high-level voltage output to an input terminal of the OR gate 2763. After receiving the first high-level voltage output from the Schmitt trigger 2744, the OR gate 2763 outputs a second high-level voltage to the base terminal of the transistor 2782 and the resistor 2747. When the base terminal of transistor 2782 receives the second high-level voltage output from the OR gate 2763, the collector and emitter terminals of transistor 2782 are turned on, thereby turning on the power supply circuit of the LED straight tube lamp (at least including the first installation detection terminal 2521, transistor 2782, resistor 2774 and the second installation detection terminal 2522); and at the same time, after the base terminal of transistor 2746 receives the second high-level voltage output from the OR gate 2763 via resistor 2747, the collector and emitter terminals of transistor 2746 are turned on and grounded, so that the voltage of capacitor 2743 is discharged to the ground via resistor 2745. When the voltage of capacitor 2743 is not enough to trigger the Schmitt trigger 2744, the output of the Schmitt trigger 2744 drops from the first high-level voltage back to the first low-level voltage (the first low-level voltage, the first high-level voltage and the second first low-level voltage constitute a first pulse signal). When the power circuit of the LED straight tube lamp is turned on, the current flowing through the capacitor in the LED power circuit (for example, the filter capacitor of the filter circuit) through transient response flows through the transistor 2782 and the resistor 2774, and forms a voltage signal on the resistor 2774. This voltage signal is compared with a reference voltage (1.3V in this embodiment, but not limited to this) via the comparator 2772. When this voltage signal is greater than and / or equal to this reference voltage, the comparator 2772 outputs a third high-level voltage to the frequency input terminal CLK of the D-type flip-flop 2762. At the same time, since the data input terminal D of the D-type flip-flop 2762 is connected to the driving voltage, the output terminal Q of the D-type flip-flop 2762 outputs a high-level voltage to the other input terminal of the OR gate 2763, so that the OR gate 2763 outputs and maintains the second high-level voltage to the base terminal of the transistor 2782, thereby keeping the transistor 2782 and the power circuit of the LED straight tube lamp turned on. Since the OR gate 2763 outputs and maintains the second high voltage level, the transistor 2746 also remains turned on and grounded, thereby preventing the voltage of the capacitor 2743 from rising enough to trigger the Schmitt trigger 2744 .

[0383] When the voltage signal on the resistor 2774 is less than the reference voltage, the comparator 2772 outputs a third low voltage to the frequency input terminal CLK of the D-type flip-flop 2762. At the same time, since the initial output value of the D-type flip-flop 2762 is zero, the output terminal Q of the D-type flip-flop 2762 outputs a low voltage to the other input terminal of the OR gate 2763. Since the Schmitt trigger 2744 connected to one end of the OR gate 2763 also resumes outputting the first low voltage, the OR gate 2763 outputs and maintains the second low voltage to the base terminal of the transistor 2782, thereby maintaining the transistor 2782 off and the power supply circuit of the LED straight tube lamp open. However, since the OR gate 2763 outputs and maintains the second low voltage, the transistor 2746 also remains in the off state, and the driving voltage is charged to the capacitor 2743 through the resistor 2742 to repeat the next (pulse) detection.

[0384] It is worth noting that the pulse period is determined by the resistance value of resistor 2742 and the capacitance value of capacitor 2743. In some embodiments, the time interval of the pulse signal is 3ms~500ms, and further, the time interval of the pulse signal is 20ms~50ms; the pulse width is determined by the resistance value of resistor 2745 and the capacitance value of capacitor 2743. In some embodiments, the width of the pulse signal includes 1us~100us, and further, the width of the pulse signal includes 10us~20us; the Zener diode 2748 provides a protection function, but it can be omitted; based on power factor considerations, the resistor 2774 can be two resistors in parallel, and its equivalent resistance value includes 0.1 ohm~5 ohms; resistors 2776 and 2777 provide voltage division to ensure that the input voltage is higher than the reference voltage of the comparator 2773 (0.3V in this embodiment, but not limited to this); capacitor 2778 provides voltage stabilization and filtering functions; diode 2775 ensures the unidirectionality of signal transmission. In addition, it should be emphasized that the installation detection module disclosed in the present invention can be applied to other double-end power supply LED lighting equipment, such as: LED lamps with a double-end power supply architecture and LED lamps that directly use AC power or use the signal output by the ballast as an external driving voltage, etc. The present invention does not limit the scope of application of the installation detection module.

[0385] See also Figure 15L , Figure 15LSchematic diagram of the circuit of the installation detection module according to the embodiment of the present invention. The installation detection module 2520 may include a pulse generation auxiliary circuit 2840, an integrated control module 2860, a switch circuit 2880 and a detection and determination auxiliary circuit 2870. Among them, the integrated control module 2860 includes at least three pins, namely two input terminals IN1 and IN2 and an output terminal OT. The pulse generation auxiliary circuit 2840 is electrically connected to the input terminal IN1 and the output terminal OT of the integrated control module 2860 to assist the integrated control module 2860 in generating a control signal. The detection and determination auxiliary circuit 2870 is electrically connected to the input terminal IN2 of the integrated control module 2860 and the switch circuit 2880. When the switch circuit 2880 is connected to the LED power supply circuit, it can be used to return a sampling signal associated with the power supply circuit to the input terminal IN2 of the integrated control module 2860, so that the integrated control module 2860 can judge the installation status of the LED straight tube lamp and the lamp holder based on this sampling signal. The switch circuit 2880 is electrically connected to one end of the LED straight tube lamp power circuit and the detection and judgment auxiliary circuit 2870 respectively, so as to receive the control signal output by the integrated control module 2860, and be turned on during the enabling period of the control signal, so that the LED straight tube lamp power circuit is turned on.

[0386] More specifically, the integrated control module 2860 can be used to temporarily turn on the switch circuit 2880 by outputting a control signal having at least one pulse at the output terminal OT during a detection phase according to the signal received at the input terminal IN1. During this detection phase, the integrated control module 2860 can detect whether the LED straight tube lamp is correctly installed in the lamp holder according to the signal at the input terminal IN2 and latch the detection result as a basis for whether to turn on the switch circuit 2880 after the detection phase ends (i.e., to determine whether power is normally supplied to the LED module). The detailed circuit architecture and overall circuit operation of the third preferred embodiment will be described below.

[0387] See also Figure 15M , is a schematic diagram of the internal circuit module of the integrated control module according to an embodiment of the present invention. The integrated control module 2860 includes a pulse generating unit 2862, a detection result latching unit 2863 and a detection unit 2864. The pulse generating unit 2862 receives a signal provided by the pulse generating auxiliary circuit 2840 from the input terminal IN1, and generates at least one pulse signal accordingly, and the generated pulse signal is provided to the detection result latching unit 2863. In this embodiment, the pulse generating unit 2862 can be, for example, a Schmitt trigger (not shown, refer to Fig.15HThe pulse generating unit 2862 of the present invention is implemented by a Schmitt trigger 2744, whose input end is coupled to the input end IN1 of the integrated control module 2860, and whose output end is coupled to the output end OT of the integrated control module 2860. However, the pulse generating unit 2862 of the present invention is not limited to being implemented by a circuit architecture using a Schmitt trigger. Any analog / digital circuit architecture that can realize the function of generating at least one pulse signal can be applied here.

[0388] The detection result latch unit 2863 couples the pulse generating unit 2862 and the detection unit 2864. In the detection phase, the detection result latch unit 2863 provides the pulse signal generated by the pulse generating unit 2862 as a control signal to the output terminal OT. On the other hand, the detection result latch unit 2863 also latches the detection result signal provided by the detection unit 2864, and provides it to the output terminal OT after the detection phase, so as to determine whether to turn on the switch circuit 2880 according to whether the installation status of the LED straight tube lamp is correct. In the present embodiment, the detection result latch unit 2863 can be, for example, a D-type flip-flop with an OR gate circuit structure (not shown, refer to Fig.15I The detection result latch unit 2863 of the present invention is implemented by using a D-type flip-flop 2762 and an OR gate 2763). The D-type flip-flop has a data input terminal, a frequency input terminal and an output terminal. The data input terminal is connected to the driving voltage VCC, and the frequency input terminal is connected to the detection unit 2864. The OR gate has a first input terminal, a second input terminal and an output terminal, the first input terminal is connected to the pulse generating unit 2862, the second input terminal is connected to the output terminal of the D-type flip-flop, and the output terminal of the OR gate is connected to the output terminal OT. However, the detection result latch unit 2863 of the present invention is not limited to being implemented using a circuit architecture of a D-type flip-flop and an OR gate. Any analog / digital circuit architecture that can realize the function of latching and outputting a control signal to control the switching of the switch circuit 2880 can be applied here.

[0389] The detection unit 2864 is coupled to the detection result latch unit 2863. The detection unit 2864 receives the signal provided by the detection determination auxiliary circuit 2870 from the input terminal IN2, and generates a detection result signal indicating whether the LED straight tube lamp is correctly installed, and the generated detection result signal is provided to the detection result latch unit 2863. In this embodiment, the detection unit 2864 can be, for example, a comparator (not shown, refer to Figure 15KThe comparator 2772 is implemented. The comparator has a first input terminal, a second input terminal and an output terminal, the first input terminal is connected to a setting signal, the second input terminal is connected to the input terminal IN2, and the output terminal of the comparator 2772 is connected to the detection result latch unit 2863. However, the detection unit 2864 of the present invention is not limited to being implemented using a comparator circuit architecture. Any analog / digital circuit architecture that can determine whether the LED straight tube lamp is correctly installed based on the signal on the input terminal IN2 can be applied here.

[0390] See also Fig.15N , Fig.15N Schematic diagram of a pulse generating auxiliary circuit according to an embodiment of the present invention. Pulse generating auxiliary circuit 2840 includes resistors 2842, 2844 and 2846, capacitor 2843 and transistor 2845. One end of resistor 2842 is connected to a driving voltage (such as VCC). One end of capacitor 2843 is connected to the other end of resistor 2842, and the other end of capacitor 2843 is grounded. One end of resistor 2844 is connected to the connection end of resistor 2842 and capacitor 2843. Transistor 2845 has a base terminal, a collector terminal and an emitter terminal. The collector terminal is connected to the other end of resistor 2844, and the emitter terminal is grounded. One end of resistor 2846 is connected to the base terminal of transistor 2845, and the other end of resistor 2846 is connected to the output terminal OT of integrated control module 2840 and the control terminal of switch circuit 2880 via path 2841. The pulse generation auxiliary circuit 2840 further includes a Zener diode 2847 having an anode terminal and a cathode terminal. The anode terminal is connected to the other end of the capacitor 2843 and grounded, and the cathode terminal is connected to one end of the capacitor 2863 and the resistor 2842 .

[0391] See also Fig.15O , Fig.15O2 is a circuit diagram of a detection and determination auxiliary circuit according to an embodiment of the present invention. The detection and determination auxiliary circuit 2870 includes resistors 2872, 2873 and 2875, a capacitor 2874 and a diode 2876. One end of the resistor 2872 is connected to one end of the switch circuit 2880, and the other end of the resistor 2872 is connected to the other end of the LED power supply circuit (for example: the second installation detection end 2522). One end of the resistor 2873 is connected to the driving voltage (such as VCC). One end of the resistor 2874 is connected to the other end of the resistor 2873 and is connected to the input end IN2 of the integrated control module 2860 via the path 2871, and the other end of the resistor 2874 is grounded. The capacitor 2875 is connected in parallel with the resistor 2874. The diode 2876 has an anode end and a cathode end, the anode end is connected to one end of the resistor 2872, and the cathode end is connected to the connection end of the resistors 2873 and 2874. In some embodiments, the resistor 2873, the resistor 2874, the capacitor 2875 and the diode 2876 can be omitted. When the diode 2876 is omitted, one end of the resistor 2872 is directly connected to the input terminal IN2 of the integrated control module 2860 via the path 2871. In some embodiments, based on power factor considerations, the resistor 2872 can be two resistors in parallel, and the equivalent resistance value includes 0.1 ohm to 5 ohms.

[0392] See also Figure 15P , Figure 15P 2 is a circuit diagram of a switch circuit according to an embodiment of the present invention. The switch circuit 2880 includes a transistor 2882 having a base terminal, a collector terminal and an emitter terminal. The base terminal of the transistor 2882 is connected to the output terminal OT of the integrated control module 2860 via a path 2861, the collector terminal of the transistor 2882 is connected to one end of the LED power supply circuit (e.g., the first installation detection terminal 2521), and the emitter terminal of the transistor 2882 is connected to the detection and determination auxiliary circuit 2870. Among them, the transistor 2882 can also be replaced by an equivalent component of other electronic switches, such as MOSFET, etc.

[0393] It should be noted here that the installation detection principle used by the installation detection module of this embodiment is the same as that of the aforementioned second preferred embodiment, and is based on the principle that the capacitor voltage will not change suddenly. Before the power circuit is turned on, the voltage across the capacitor in the LED straight tube lamp power circuit is zero and the transient response is in a short-circuit state; and when the power circuit is correctly installed in the lamp holder of the LED straight tube lamp, its transient response current limiting resistance is small and the response peak current is large; when the power circuit is not correctly installed in the lamp holder of the LED straight tube lamp, its transient response current limiting resistance is large and the response peak current is small. The leakage current of the LED straight tube lamp is less than 5MIU. In other words, it is to determine whether the LED straight tube lamp is correctly installed in the lamp holder by detecting the response peak current. Therefore, the transient current part under normal operation and lamp replacement test can refer to the description of the aforementioned embodiment, and will not be repeated here. The following will only explain the overall circuit operation of the installation detection module.

[0394] Please see again Figure 15LWhen the LED straight tube lamp is replaced in the lamp holder, the LED straight tube lamp will provide the driving voltage VCC to the module / circuit in the installation detection module 2520 when one end is powered. The pulse generation auxiliary circuit 2840 will respond to the driving voltage VCC and perform a charging action. After a period of time (this period of time determines the pulse period), its output voltage (herein referred to as the first output voltage) rises from a first low-level voltage to exceed a forward threshold voltage (the voltage value can be defined according to the circuit design), and is output to the input terminal IN1 of the integrated control module 2860 through a path 2841. After the integrated control module 2860 receives the first output voltage from the input terminal IN1, it outputs a consistent control signal (for example, a high-level voltage) to the switch circuit 2880 and the pulse generation auxiliary circuit 2840 through a path 2861. When the switch circuit 2880 receives the enable control signal, the switch circuit 2880 is turned on so that a power supply circuit of the LED straight tube lamp (at least including the first installation detection terminal 2521, the switch circuit 2880, the path 2881, the detection and judgment auxiliary circuit 2870 and the second installation detection terminal 2522) is turned on; and at the same time, the pulse generation auxiliary circuit 2840 will respond to the enable control signal and turn on the discharge path to perform a discharge action, and after a period of time (this period of time determines the pulse width) after receiving the enable control signal returned by the integrated control module 2860, the first output voltage gradually drops back to the first low level voltage from the voltage level exceeding the forward threshold voltage. When the first output voltage drops below a reverse threshold voltage (the voltage value can be defined according to the circuit design), the integrated control module 2860 will react to the first output voltage and pull the enabled control signal down to the disabled level (i.e., output a disabled control signal, wherein the disabled control signal is, for example, a low-level voltage), so that the control signal has a pulse-shaped signal waveform (i.e., a first pulse signal is formed by the first low-level voltage, the high-level voltage and the second low-level voltage in the control signal). When the power supply circuit of the LED straight tube lamp is turned on, the detection and determination auxiliary circuit 2870 detects a first sampling signal (e.g., a voltage signal) on the circuit, and provides the first sampling signal to the integrated control module 2960 via the input terminal IN2. When the integrated control module 2960 determines that the first sampling signal is greater than or equal to a set signal (for example, a reference voltage), according to the application principle of the present invention mentioned above, it indicates that the LED straight tube lamp is correctly installed in the lamp holder. Therefore, the integrated control module 2860 will output and maintain an enabled control signal to the switch circuit 2880. The switch circuit 2880 receives the enabled control signal and maintains conduction so that the power supply circuit of the LED straight tube lamp remains conductive. During this period, the integrated control module 2860 no longer generates a pulse output.

[0395] On the contrary, when the integrated control circuit 2860 determines that the first sampling signal is less than the set signal, according to the application principle of the present invention mentioned above, it means that the LED straight tube lamp has not been correctly installed in the lamp holder. Therefore, the integrated control circuit will output and maintain a disable control signal to the switch circuit 2880. The switch circuit 2880 receives the disable control signal and maintains cutoff to keep the power supply circuit of the LED straight tube lamp open.

[0396] Since the discharge path of the pulse generation auxiliary circuit 2840 is cut off, the pulse generation auxiliary circuit 2840 performs a charging action again. Therefore, when the power supply circuit of the above-mentioned LED straight tube lamp remains open for a period of time (i.e., the pulse cycle time), the first output voltage of the pulse generation auxiliary circuit 2840 rises from the first low-level voltage to exceed the forward threshold voltage again, and is output to the input terminal IN1 of the integrated control module 2860 through the path 2841. After the integrated control module 2860 receives the first output voltage from the input terminal IN1, it will again pull the control signal from the disable level to the enable level (i.e., output the enabled control signal), and provide the enabled control signal to the switch circuit 2880 and the pulse generation auxiliary circuit 2840. When the switch circuit 2880 receives the enabling control signal, the switch circuit 2880 is turned on so that the power supply circuit of the LED straight tube lamp (at least including the first installation detection terminal 2521, the switch circuit 2880, the path 2881, the detection and determination auxiliary circuit 2870 and the second installation detection terminal 2522) is also turned on again. At the same time, the pulse generation auxiliary circuit 2840 will again respond to the enabling control signal to turn on the discharge path and perform a discharge action, and after a period of time (this period of time determines the pulse width) after receiving the enabling control signal returned by the integrated control module 2860, the first output voltage gradually drops back to the first low voltage level from the voltage level exceeding the forward threshold voltage. When the first output voltage drops below the reverse threshold voltage, the integrated control module 2860 will respond to the first output voltage and pull the enabling control signal down to the disable level, so that the control signal has a signal waveform in the form of a pulse (that is, the third low voltage level, the second high voltage level and the fourth low voltage level in the control signal constitute a second pulse signal). When the power circuit of the LED straight tube lamp is turned on again, the detection and determination auxiliary circuit 2870 also detects a second sampling signal (e.g., voltage signal) on the circuit again, and provides the second sampling signal to the integrated control module 2960 via the input terminal IN2. When the second sampling signal is greater than and / or equal to the setting signal (e.g., a reference voltage), according to the application principle of the present invention, it indicates that the LED straight tube lamp is correctly installed in the lamp holder, so the integrated control module 2860 will output and maintain the enabled control signal to the switch circuit 2880. The switch circuit 2880 receives the enabled control signal and then maintains the conduction so that the power circuit of the LED straight tube lamp remains on. During this period, the integrated control module 2860 no longer generates pulse output.

[0397] When the integrated control circuit 2860 determines that the second sampling signal is less than the set signal, according to the application principle of the present invention, it means that the LED straight tube lamp is not correctly installed in the lamp holder, so the integrated control circuit will output and maintain a disabled control signal to the switch circuit 2880. The switch circuit 2880 receives the disabled control signal and then maintains the cutoff to keep the power circuit of the LED straight tube lamp open. In this case, the user is prevented from getting an electric shock due to accidentally touching the conductive part of the LED straight tube lamp when the LED straight tube lamp has not been correctly installed in the lamp holder.

[0398] The following is a more detailed description of the internal circuit / module operation of the installation detection module of this embodiment. Figure 15M to Figure 15P When the LED straight tube lamp is replaced in the lamp holder, a driving voltage VCC charges the capacitor 2743 via the resistor 2742, and when the voltage of the capacitor 2843 rises to a level sufficient to trigger the pulse generating unit 2862 (i.e., exceeds the forward threshold voltage), the output of the pulse generating unit 2862 changes from an initial first low-level voltage to a first high-level voltage output to the detection result latch unit 2863. After receiving the first high-level voltage output from the pulse generating unit 2862, the detection result latch unit 2863 outputs a second high-level voltage to the base terminal of the transistor 2882 and the resistor 2846 via the output terminal OT. When the base terminal of transistor 2882 receives the second high-level voltage output from the detection result latch unit 2863, the collector and emitter terminals of transistor 2882 are turned on, thereby turning on the power supply circuit of the LED straight tube lamp (at least including the first installation detection terminal 2521, transistor 2882, resistor 2872 and the second installation detection terminal 2522).

[0399] At the same time, after the base terminal of transistor 2845 receives the second high voltage on the output terminal OT through resistor 2846, the collector terminal and the emitter terminal of transistor 2845 are connected to the ground, so that the voltage of capacitor 2843 is discharged to the ground through resistor 2844. When the voltage of capacitor 2843 is not enough to trigger the pulse generating unit 2862, the output of pulse generating unit 2862 drops from the first high voltage back to the first low voltage (the first low voltage, the first high voltage and the second low voltage constitute a first pulse signal). When the power supply circuit of the LED straight tube lamp is turned on, the current flowing through the capacitor in the LED power supply circuit (for example, the filter capacitor of the filter circuit) through the transient response flows through transistor 2882 and resistor 2872, and forms a voltage signal on resistor 2872. This voltage signal is provided to the input terminal IN2, so that the detection unit 2864 can compare this voltage signal with a reference voltage.

[0400] When the detection unit 2864 determines that the voltage signal is greater than or equal to the reference voltage, the detection unit 2864 outputs a third high level voltage to the detection result latch unit 2863. When the detection unit 2864 determines that the voltage signal on the resistor 2872 is less than the reference voltage, the detection unit 2864 outputs a third low level voltage to the detection result latch unit 2863.

[0401] Among them, the detection result latch unit 2863 latches the third high level voltage / third low level voltage provided by the detection unit 2864, and then performs an OR logic operation on the latched signal and the signal provided by the pulse generating unit 2862, and determines the output control signal as the second high level voltage or the second low level voltage according to the result of the OR logic operation.

[0402] More specifically, when the detection unit 2864 determines that the voltage signal on the resistor 2872 is greater than or equal to the reference voltage, the detection result latch unit 2863 latches the third high voltage output by the detection unit 2864, thereby maintaining the output of the second high voltage to the base terminal of the transistor 2882, thereby maintaining the transistor 2882 and the power supply circuit of the LED straight tube lamp. Since the detection result latch unit 2863 outputs and maintains the second high voltage, the transistor 2845 also remains on and grounded, thereby preventing the voltage of the capacitor 2843 from rising enough to trigger the pulse generating unit 2862. When the detection unit 2864 determines that the voltage signal on the resistor 2872 is less than the reference voltage, the detection unit 2864 and the pulse generating unit 2862 both provide low voltages, so after the OR logic operation, the detection result latch unit 2863 outputs and maintains the second low voltage to the base terminal of the transistor 2882, thereby maintaining the transistor 2882 off and the power supply circuit of the LED straight tube lamp open. However, since the control signal on the output terminal OT is maintained at the second low voltage level at this time, the transistor 2845 is also maintained in the cut-off state, and the driving voltage VCC charges the capacitor 2843 through the resistor 2842 to repeat the next (pulse) detection.

[0403] It is mentioned here that the detection phase described in the present embodiment can be defined as the period during which the driving voltage VCC has been provided to the installation detection module 2520, but the detection unit 2864 has not yet determined that the voltage signal on the resistor 2872 is greater than or equal to the reference voltage. In the detection phase, the control signal output by the detection result latch unit 2863 repeatedly turns on and off the transistor 2845, so that the discharge path is periodically turned on and off. The capacitor 2843 will react to the on / off of the transistor 2845 and charge and discharge periodically. Therefore, the detection result latch unit 2863 will output a control signal with a periodic pulse waveform in the detection phase. When the detection unit 2864 determines that the voltage signal on the resistor 2872 is greater than or equal to the reference voltage, or the driving voltage VCC is stopped, it can be regarded as the end of the detection phase (it has been determined that it is correctly installed, or the LED lamp has been unplugged). At this time, the detection result latch unit 2863 will output a control signal maintained at the second high level voltage or the second low level voltage.

[0404] On the other hand, comparing Figure 15G From the perspective of FIG. 1 , compared with the second preferred embodiment, the integrated control module 2860 of the present embodiment may be formed by integrating some circuit components of the detection pulse generation module 2740, the detection result latch circuit 2760 and the detection determination circuit 2770, while the circuit components that are not integrated respectively constitute the pulse generation auxiliary circuit 2840 and the detection determination auxiliary circuit 2870 of the present embodiment. In other words, the function / circuit architecture of the pulse generation unit 2862 in the integrated control module 2860 in combination with the pulse generation auxiliary circuit 2840 may be equivalent to the detection pulse generation module 2740 of the second preferred embodiment, the function / circuit architecture of the detection result latch unit 2863 in the integrated control module 2860 may be equivalent to the detection result latch module 2760 of the second preferred embodiment, and the function / circuit architecture of the detection unit 2864 in the integrated control module 2860 in combination with the detection determination auxiliary circuit 2870 may be equivalent to the detection determination circuit 2770.

[0405] See also Figure 15Q , Figure 15QSchematic diagram of the internal circuit module of the three-terminal switch device according to an embodiment of the present invention. The installation detection module of this embodiment can be, for example, a three-terminal switch device 2920 including a power terminal VP1, a first switching terminal SP1 and a second switching terminal SP2. Among them, the power terminal VP1 of the three-terminal switch device 2920 is suitable for receiving the driving voltage VCC, the first switching terminal SP1 is suitable for connecting one of the first installation detection terminal 2521 and the second installation detection terminal 2522 (the figure is shown as connecting the first installation detection terminal 2521, but not limited to this), and the second switching terminal SP2 is suitable for connecting the other of the first installation detection terminal 2521 and the second installation detection terminal 2522 (the figure is shown as connecting the second installation detection terminal 2522, but not limited to this).

[0406] The three-terminal switch device 2920 includes a signal processing unit 2930, a signal generating unit 2940, a signal acquisition unit 2950 and a switch unit 2960. In addition, the three-terminal switch device 2920 may also include an internal power detection unit 2970. The signal processing unit 2930 may output a control signal with a pulse waveform in the detection phase according to the signals provided by the signal generating unit 2940 and the signal acquisition unit 2950, ​​and output a control signal maintained at a high voltage level or a low voltage level after the detection phase to control the conduction state of the switch unit 2960, so as to determine whether to conduct the power circuit of the LED straight tube lamp. The signal generating unit 2940 may generate a pulse signal to the signal processing unit 2930 when receiving the driving voltage VCC. The pulse signal generated by the signal generating unit 2940 may be generated based on a reference signal received from the outside, or generated independently by itself, and the present invention is not limited to this. The "external" mentioned here is relative to the signal generating unit 2940, that is, as long as it is a reference signal not generated by the signal generating unit 2940, whether it is generated by other circuits in the three-terminal switch device 2920 or generated by the external circuit of the three-terminal switch device 2920, it belongs to the reference signal received from the outside as mentioned here. The signal acquisition unit 2950 can be used to sample the electrical signal on the power supply circuit of the LED straight tube lamp, and detect the installation status of the LED straight tube lamp based on the sampled signal, and then transmit the detection result signal indicating the detection result to the signal processing unit 2930 for processing.

[0407] In an exemplary embodiment, the three-terminal switch device 2920 can be implemented using an integrated circuit, that is, the three-terminal switch device can be a three-terminal switch control chip, which...

Claims

1. An installation detection device, applied to an LED lamp including a power module, characterized in that: The installation detection device is connected in series in the loop of the power module to detect the installation status of the LED lamp and a lamp holder, and includes: An integrated circuit, used to determine whether the LED lamp is correctly installed, includes at least the following terminals: The first installation detection terminal and the second installation detection terminal are used to connect between the rectifier output end of the rectifier circuit in the power module and the filter output end of the filter circuit in the power module to form a power supply circuit for the LED lamp; A first input terminal, used to be grounded via a first capacitor; a second input terminal, used to connect the first installation detection terminal through a first resistor; A power terminal, used to connect to a node in the power module to obtain a driving voltage signal; GND terminal, used for grounding; The integrated circuit detects the detection signal from the second input terminal based on the electrical signal from the first input terminal, and switches on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

2. The installation detection device according to claim 1, characterized in that: The installation detection device also includes a pulse generation auxiliary circuit, which is electrically connected to the integrated circuit to assist the integrated circuit in generating a control signal. The pulse generation auxiliary circuit includes a second resistor, a third resistor, a fourth resistor, a second capacitor and a first transistor. One end of the second resistor is coupled to a node in the power module to obtain a driving signal, and the other end is coupled to one end of the second capacitor, and the other end of the second capacitor is grounded; one end of the third resistor is coupled to the connection end between the second resistor and the second capacitor and the integrated circuit; the first end of the first transistor is coupled to the other end of the third resistor, its second end is grounded, and the third end is connected to the fourth resistor.

3. The installation detection device according to claim 1, characterized in that: The result of the integrated circuit maintaining the voltage level of the first capacitor between 10 μs and 1 ms through the first input terminal is represented by a pulse signal.

4. The installation detection device according to claim 2, characterized in that: The installation detection device also includes a detection and judgment auxiliary circuit, which is used to return a sampling signal associated with the power module circuit to the integrated circuit when the power module circuit is turned on; the detection and judgment auxiliary circuit includes a fifth resistor, a sixth resistor, a seventh resistor, a third capacitor and a diode, one end of the fifth resistor is coupled to the filter circuit; one end of the sixth resistor is coupled to a drive signal, and the other end is coupled to one end of the seventh resistor, which is also electrically connected to the integrated circuit and the cathode end of the diode; the other end of the seventh resistor is grounded, and the seventh resistor is connected in parallel with the third capacitor; the anode end of the diode is electrically connected to the fifth resistor.

5. The installation detection device according to claim 4, characterized in that: It also includes a first switching circuit, which is used to receive the control signal of the integrated circuit and is turned on during the period when the control signal is enabled. The pulse generation auxiliary circuit includes a second transistor, a first end of the second transistor is coupled to the integrated circuit, a second end of the second transistor is coupled to the rectifier circuit, and a third end of the second transistor is coupled to the detection and judgment auxiliary circuit.

6. The installation detection device according to claim 1, characterized in that: A second switch circuit is integrated in the integrated circuit, wherein two ends of the second switch circuit are connected to the first installation detection terminal and the second installation detection terminal.

7. The installation detection device according to claim 6, characterized in that: The integrated circuit integrates a part of the circuit structure in the detection and determination circuit; the first resistor belongs to the detection and determination circuit; the detection and determination circuit is connected to the second switch circuit; The detection determination circuit detects a detection signal provided by the second input terminal and outputs a detection result signal.

8. The installation detection device according to claim 7, characterized in that: The integrated circuit integrates a partial circuit structure in a pulse generating unit, wherein the pulse generating unit includes the first capacitor, and the pulse generating unit generates a pulse signal using a voltage signal provided by the first capacitor; The pulse generating unit further includes a first switch tube and a Schmitt trigger; two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; The control end of the first switch tube is connected to the detection result latch unit.

9. The installation detection device according to claim 8, characterized in that: The integrated circuit further includes: a detection result latch unit, coupled to the control end of the second switch circuit, latching the detection result signal, and outputting a control signal to the control end of the second switch circuit based on the pulse signal and the detection result signal.

10. A power module device for an LED lamp, wherein: The LED lamp receives an external AC signal through a pin, and is characterized in that the power module device includes: The first diode and the second diode constitute a first bridge arm for receiving an alternating current signal from a first pin in the LED lamp; A full-bridge rectifier circuit receives the AC signal from the second pin and the third pin of the LED lamp; wherein the first bridge arm and the full-bridge rectifier circuit are both connected between the first rectifier output terminal and the second rectifier output terminal; A third capacitor, a fourth capacitor and a first inductor, wherein one end of the third capacitor is connected to the first rectifier output terminal and one end of the first inductor respectively, the other end of the first inductor is connected to one end of the fourth capacitor and the first filter output terminal, and the other end of the third capacitor is connected to the other end of the fourth capacitor and the second filter output terminal; A driving circuit, comprising: a controller, a second inductor, and a fifth capacitor; wherein the first switch terminal of the controller is connected to the circuit connected to the first filter output terminal, the second switch terminal of the controller is connected to one end of the second inductor, and the other end of the second inductor is connected between the second filter output terminals through the fifth capacitor; wherein the two ends of the fifth capacitor are coupled to the two driving output terminals of the power module device; Among them, the pins of the LED lamp, the first rectifier output terminal and the second rectifier output terminal, the first filter output terminal and the second filter output terminal, and the two drive output terminals connect the nodes of the power module device to the power supply circuit of the LED lamp; The power module device further comprises an installation detection module, which comprises an integrated circuit and a connected circuit structure; wherein the integrated circuit obtains a driving voltage signal using a node in the power module device; Wherein, the first installation detection terminal and the second installation detection terminal of the integrated circuit are connected to the power supply line between the second filter output terminal and the second rectifier output terminal; The first input terminal of the integrated circuit is grounded via a first capacitor; The second input terminal of the integrated circuit is connected to the first installation detection terminal through a first resistor; The power supply terminal of the integrated circuit is connected to a node in the power supply module to obtain a driving voltage signal; The integrated circuit detects the detection signal from the second input terminal based on the electrical signal from the first input terminal, and switches on / off the first installation detection terminal and the second installation detection terminal based on the detection result.

11. The power module device for LED lamp according to claim 10, characterized in that: The full-bridge rectifier circuit includes: a third diode and a fourth diode, which constitute a second bridge arm for receiving an AC signal from a second pin of the LED lamp; and a fifth diode and a sixth diode, which constitute a third bridge arm for receiving an AC signal from a third pin of the LED lamp.

12. The power module device for LED lamp according to claim 11, characterized in that: Any two bridge arms among the first bridge arm, the second bridge arm and the third bridge arm rectify the external AC signal provided by the connected pins, and output the rectified signal through the first rectifier output end and the second rectifier output end.

13. The power module device for LED lamp according to claim 10, characterized in that: The third capacitor, the fourth capacitor and the first inductor form a filter circuit, and the filter circuit performs filtering processing on the rectified signal and outputs the filtered signal through the first filter output terminal and the second filter output terminal.

14. The power module device for LED lamp according to claim 10, characterized in that: The integrated circuit integrates a partial circuit structure in a pulse generating unit, and the pulse generating unit also includes the first capacitor; the pulse generating unit generates a pulse signal using a voltage signal provided by the first capacitor.

15. The power module device for LED lamp according to claim 10, characterized in that: The result of the integrated circuit maintaining the voltage level of the first capacitor between 10 μs and 1 ms through the first input terminal is represented by a pulse signal.

16. The power module device for LED lamp according to claim 14, characterized in that: The pulse generating unit generates a first pulse signal and a second pulse signal to prevent the level of the external driving signal from being near zero during a single detection, wherein the time interval between the two pulse signals is (X+Y) / (T / 2), wherein T is the period of the external AC signal, X is an integer greater than or equal to zero, and Y is between 0.05-0.

09.

17. The power module device for LED lamp according to claim 14, characterized in that: The pulse generating unit also includes a first switch tube and a comparator; the input end of the comparator is connected to the first capacitor through a first input terminal, and the output end outputs a pulse signal; wherein the output end of the comparator is also connected to the control end of the first switch tube; the two ends of the first switch tube are connected to the line between the first input terminal and the second installation detection terminal.

18. The power module device for LED lamp according to claim 14, characterized in that: A transistor is integrated in the integrated circuit, wherein two ends of the transistor are connected to the first mounting detection terminal and the second mounting detection terminal.

19. The power module device for LED lamp according to claim 18, characterized in that: The integrated circuit integrates a part of the circuit structure in the detection and determination circuit; the first resistor belongs to the detection and determination circuit; the detection and determination circuit is connected to the transistor; the detection and determination circuit detects the detection signal provided by the second input terminal and outputs a detection result signal.

20. The power module device for LED lamp according to claim 19, characterized in that: The integrated circuit further includes: a detection result latch unit, coupled to the control end of the transistor, latching the detection result signal, and outputting a control signal to the control end of the transistor based on the pulse signal and the detection result signal.

21. The power module device for LED lamp according to claim 20, characterized in that: The pulse generating unit further includes a first switch tube and a Schmitt trigger; two ends of the first switch tube are connected to the line between the first input terminal and the first installation detection terminal, the input end of the Schmitt trigger is connected to the first capacitor through the first input terminal, and outputs a pulse signal; The control end of the first switch tube is connected to the detection result latch unit.

22. The power module device for LED lamp according to claim 10, characterized in that: The first resistor is equivalent to two resistors connected in parallel.

23. An LED lamp, characterized in that: include: A power module device as described in any one of claims 10 to 22; as well as The LED module is coupled to the two driving output terminals of the power module device and emits light using the received driving signal.

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