LED drivers, LED lamps and calibration systems

Abstract

The present application relates to an LED driver, an LED lamp and a verification system, wherein a first verification circuit and a second verification circuit are arranged between the LED driver and the LED lamp, wherein a first control unit of the first verification circuit sends an address code to the second verification circuit through a first demodulation circuit, and a second decoding circuit of the second verification circuit receives the address code and transmits it back to the second control unit for identification, and after the second control unit identifies the address code, it notifies the second switch circuit to turn on, and at the same time, outputs a confirmation code to the first demodulation circuit through the first decoding circuit and controls the first switch circuit to continue to turn on, thereby completing the electrical verification of the LED lamp and the LED driver. This effectively prevents counterfeiting of LED lamp products and prevents consumers from using counterfeit and shoddy products and causing safety hazards.

Description

Technical Field

[0001] The present application relates to the field of LED technology, and more specifically, to an LED driver, an LED lamp and a calibration system. Background Art

[0002] With the rapid development and iteration of LED lighting, consumers' focus on lighting products has shifted from low prices to high quality. In order to protect and purify the market environment and provide consumers with better products and services. Therefore, product anti-counterfeiting has become a necessary means to protect regular manufacturers and consumers. Regarding product anti-counterfeiting measures, companies generally adopt anti-counterfeiting identification methods such as anti-counterfeiting logos or QR codes on the product body (laser engraving) and laser anti-counterfeiting printing on the outer packaging. The above anti-counterfeiting methods cannot completely eliminate counterfeit and shoddy products, resulting in safety hazards caused by the use of counterfeit and shoddy products. Summary of the invention

[0003] The present application aims to overcome the potential safety hazard caused by the use of counterfeit and shoddy products. The technical problem to be solved by the present application is to provide an LED driver, an LED lamp and a calibration system.

[0004] The LED driver is arranged in the LED driver and includes a first verification circuit and a first switch circuit.

[0005] The driving output end of the LED driver is connected to the driving input end of the LED lamp, and the first verification circuit and the first switch circuit are connected to the driving output end;

[0006] The first verification circuit controls the on and off of the first switch circuit by sending an address code to the LED lamp and receiving a confirmation code from the LED lamp.

[0007] Optionally, the first verification circuit includes a first control unit, and a first modulation circuit and a first demodulation circuit connected to the first control unit;

[0008] The first control unit is also connected to the first switch circuit. The first control unit sends an address code to the LED lamp through the first modulation circuit, and the first control unit receives a confirmation code from the LED lamp through the first demodulation circuit, thereby controlling the on and off of the first switch circuit.

[0009] Optionally, the first control unit includes a main control chip, the main control chip is provided with a transmitting end, a receiving end, and a switch end, the transmitting end is connected to the first modulation circuit, the receiving end is connected to the first demodulation circuit, and the switch end is connected to the first switch circuit.

[0010] Optionally, the first modulation circuit includes a trigger circuit and a voltage regulation output circuit.

[0011] The voltage regulating output circuit is connected between the driving output terminal and the power ground; the input terminal of the trigger circuit is connected to the first control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit;

[0012] The trigger circuit receives the level signal from the first control unit and outputs the address code through the voltage regulation output circuit.

[0013] Optionally, the trigger circuit includes a first transistor, a base of the first transistor is connected to the first control unit via a first resistor, a collector is connected to the voltage regulation output circuit, and an emitter is grounded.

[0014] Optionally, the voltage regulation output circuit includes a first MOS tube, a second resistor, and a third resistor.

[0015] The gate of the first MOS tube is respectively connected to the trigger circuit, the drain is connected to the driving output end through the second resistor, and the source is grounded; the gate of the first MOS tube is also connected to the driving output end through a third resistor.

[0016] Optionally, the first demodulation circuit includes a tank circuit and a voltage regulation input circuit;

[0017] The energy storage circuit and the voltage regulating input circuit are both connected between the driving output terminal and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the first control unit;

[0018] The energy storage circuit receives the voltage change of the driving output terminal, so that the voltage regulating input circuit sends a confirmation code to the first control unit.

[0019] Optionally, the energy storage circuit includes a first diode, a second diode, and a first capacitor, and the voltage regulation input circuit includes a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;

[0020] One end of the first diode is connected to the driving output end, the other end of the first diode is connected to the second diode, the other end of the second diode is respectively connected to the first capacitor, the fourth resistor, and the fifth resistor, the other ends of the first capacitor and the fifth resistor are grounded, and the other end of the fourth resistor is connected to the base of the second transistor; the emitter of the second transistor is connected to the driving output end, the collector of the second transistor is respectively connected to the first control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded.

[0021] Optionally, the first verification circuit further includes a first power chip,

[0022] The power input end of the first power chip is connected to the LED driver, and the power output end of the first power chip is connected to the first control unit; the power input end and the power output end of the first power chip are also connected to a filter capacitor.

[0023] Optionally, the first switch circuit includes a third transistor and a second MOS transistor.

[0024] The base of the third transistor is connected to the first verification circuit, the collector is connected to the gate of the second MOS transistor, and the emitter is grounded; the drain of the second MOS transistor is connected to the driving output end, and the source is connected to the driving input end.

[0025] In addition, the present application also provides an LED lamp, which is arranged in the LED lamp and includes a second verification circuit and a second switch circuit.

[0026] The driving input end of the LED lamp is connected to the driving output end of the LED driver, and the second verification circuit and the second switch circuit are connected to the driving input end;

[0027] The second verification circuit controls the on and off of the second switch circuit and sends a confirmation code to the LED driver by receiving an address code from the LED driver.

[0028] Optionally, the second verification circuit includes a second control unit, and a second modulation circuit and a second demodulation circuit connected to the second control unit;

[0029] The second control unit is also connected to the second switch circuit. The second control unit receives the address code of the LED driver through the second demodulation circuit, and the second control unit outputs a confirmation code to the LED driver through the first modulation circuit, thereby controlling the on and off of the first switch circuit.

[0030] Optionally, the second control unit includes a main control chip, the main control chip is provided with a transmitting end, a receiving end, and a switching end, the transmitting end is connected to the second modulation circuit, the receiving end is connected to the second demodulation circuit, and the switching end is connected to the second switching circuit.

[0031] Optionally, the second modulation circuit includes a trigger circuit and a voltage regulation output circuit.

[0032] The voltage regulating output circuit is connected between the driving input terminal and the power ground; the input terminal of the trigger circuit is connected to the second control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit;

[0033] The trigger circuit receives the level signal from the second control unit and outputs a confirmation code through the voltage regulating output circuit.

[0034] Optionally, the trigger circuit includes a first transistor, a base of the first transistor is connected to the first control unit via a first resistor, a collector is connected to the voltage regulation output circuit, and an emitter is grounded.

[0035] Optionally, the voltage regulation output circuit includes a first MOS tube, a second resistor, and a third resistor.

[0036] The gate of the first MOS tube is respectively connected to the trigger circuit, the drain is connected to the driving input terminal through the second resistor, and the source is grounded; the gate of the first MOS tube is also connected to the driving input terminal through a third resistor.

[0037] Optionally, the second demodulation circuit includes a tank circuit and a voltage regulation input circuit;

[0038] The energy storage circuit and the voltage regulating input circuit are both connected between the driving input terminal and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the second control unit;

[0039] The energy storage circuit receives the voltage change of the driving input terminal, so that the voltage regulating input circuit outputs an address code to the second control unit.

[0040] Optionally, the energy storage circuit includes a first diode, a second diode, and a first capacitor, and the voltage regulation input circuit includes a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;

[0041] One end of the first diode is connected to the driving input end, the other end of the first diode is connected to the second diode, the other end of the second diode is respectively connected to the first capacitor, the fourth resistor, and the fifth resistor, the other ends of the first capacitor and the fifth resistor are grounded, and the other end of the fourth resistor is connected to the base of the second transistor; the emitter of the second transistor is connected to the driving input end, the collector of the second transistor is respectively connected to the first control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded.

[0042] Optionally, the second verification circuit further includes a second power chip,

[0043] The power input end of the second power chip is connected to the LED driver, and the power output end of the second power chip is connected to the second control unit; the power input end and the power output end of the second power chip are also connected to a filter capacitor.

[0044] Optionally, the second switch circuit includes a third triode and a second MOS tube.

[0045] The base of the third transistor is connected to the second verification circuit, the collector is connected to the gate of the second MOS transistor, and the emitter is grounded; the drain of the second MOS transistor is connected to the driving output end, and the source is connected to the driving input end.

[0046] In addition, the present application also discloses a verification system, including the above-mentioned LED driver and the above-mentioned LED lamp.

[0047] The driving output end of the LED driver is connected to the driving input end of the LED lamp. The second verification circuit controls the on-off of the second switch circuit by receiving the address code of the first verification circuit and outputs a confirmation code to the first verification circuit; the first verification circuit controls the on-off of the first switch circuit by receiving the confirmation code.

[0048] Compared with the prior art, the beneficial effects of this application are:

[0049] (1) The present application sets an LED driver in an LED driver, sends an address code to an LED lamp through a first verification circuit and receives a confirmation code of the LED lamp, turns on the first switch circuit, and implements anti-counterfeiting for the connected LED lamp.

[0050] (2) The present application sets an LED lamp in the LED lamp, receives the address code of the LED driver through the second verification circuit and sends a confirmation code to the LED driver at the same time, turns on the second switch circuit, and realizes anti-counterfeiting of the connected LED driver.

[0051] (3) The present application sets a first verification circuit and a second verification circuit between the LED driver and the LED lamp. The first control unit of the first verification circuit sends an address code to the second verification circuit through the first demodulation circuit. The second decoding circuit of the second verification circuit receives the address code and transmits it back to the second control unit for identification. After the second control unit identifies it, it notifies the second switch circuit to turn on. At the same time, the first decoding circuit outputs a confirmation code to the first demodulation circuit and controls the first switch circuit to continue to turn on, completing the electrical verification of the LED lamp and the LED driver. This effectively prevents counterfeiting of LED lamp products and prevents consumers from using counterfeit and shoddy products and causing safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] Figure 1 This is a circuit diagram of a first verification circuit and a first switch circuit according to an embodiment of the present application.

[0053] Figure 2 This is a circuit diagram of a second verification circuit and a second switch circuit in an embodiment of the present application.

[0054] Figure 3 This is a schematic diagram of the main control chip of the first control unit of an embodiment of the present application.

[0055] Figure 4 Schematic diagram of a first power chip of a first verification circuit according to an embodiment of the present application.

[0056] Figure 5 FIG. 1 is a schematic diagram of a programming circuit of a first verification circuit according to an embodiment of the present application.

[0057] Figure 6 This is a schematic diagram of the structure of the verification system of an embodiment of the present application.

[0058] Figure 7 This is a timing diagram of the interaction between the LED driver and the LED lamp according to an embodiment of the present application. DETAILED DESCRIPTION

[0059] The present application is further described below in conjunction with specific implementation methods.

[0060] The same or similar numbers in the drawings of the embodiments of the present application correspond to the same or similar parts; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "top", "bottom", "inside", "outside", etc. indicate the orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent.

[0061] In addition, if there are terms such as "first" and "second", they are only used for descriptive purposes, mainly to distinguish different devices, elements or components (the specific types and structures may be the same or different), and are not used to indicate or imply the relative importance and quantity of the indicated devices, elements or components, and cannot be understood as indicating or implying relative importance.

[0062] In such Figure 1 , Figure 3 , Figure 4 , Figure 5In an embodiment, the present application provides an LED driver, including a first verification circuit 100 and a first switch circuit 300. The LED driver is provided with a driving output terminal P1 connected to a driving input terminal P2 of an LED lamp. The first verification circuit 100 and the first switch circuit 300 are connected to the driving output terminal P1. The first verification circuit 100 controls the on-off of the first switch circuit 300 by sending an address code to the LED lamp and receiving a confirmation code from the LED lamp. In this embodiment, the driving output terminal P1 is the LED constant current driving power supply output terminal of the LED driver, and the driving input terminal P2 is the LED constant current driving power supply input terminal of the LED lamp, which is used to provide the working power supply of the LED lamp. The first verification circuit 100 and the first switch circuit 300 are connected to the driving output terminal P1, and since the driving output terminal P1 is connected to the driving input, the first verification circuit 100 can send a signal to the LED lamp or receive a signal from the LED lamp. A second verification circuit that identifies the address code and feeds back a confirmation code can be provided in the LED lamp; the LED driver of the present application communicates interactively with the LED lamp through the first verification circuit 100. The present application sets an LED driver in the LED driver, sends an address code to the LED lamp through the first verification circuit 100 and receives a confirmation code of the LED lamp, turns on the first switch circuit 300, and realizes anti-counterfeiting of the connected LED lamp.

[0063] In some embodiments, the first verification circuit 100100 includes a first control unit, and a first modulation circuit 110 and a first demodulation circuit 120 connected to the first control unit; the first control unit is also connected to the first switch circuit 300, and the first control unit sends an address code to the LED lamp through the first modulation circuit 110, and the first control unit receives a confirmation code from the LED lamp through the first demodulation circuit 120, thereby controlling the first switch circuit 300 to be turned on and off. In this embodiment, when the LED driver is connected to the LED lamp, the first control unit sends an address code to the LED lamp through the first modulation circuit 110, and receives a confirmation code from the second verification circuit through the first demodulation circuit 120, and the first control unit identifies the confirmation code. If the confirmation code corresponds to the preset code, the first control unit controls the first switch circuit 300 to be continuously turned on; if the confirmation code is empty, the first switch circuit 300 is turned off after a certain period of time.

[0064] In one implementation of the above embodiment, the first control unit is specifically a main control chip U1, and the main control chip U1 is provided with a transmitting end TX, a receiving end RX, and a switch end SW. The transmitting end TX is connected to the first modulation circuit 110, the receiving end RX is connected to the first demodulation circuit 120, and the switch end SW is connected to the first switch circuit 300. In this embodiment, the main control chip U1 can be any series of chips of the SN65HVD7x series / PIC16(L)F18xx series; the main control chip U1 is provided with a program for sending and matching codes; the burning circuit of the main control chip U1 is burned, and the burning circuit includes a burning connector, the power end of the burning connector is connected to the second input power supply VCC2, and the burning output end of the burning connector is connected to the burning end ICE CLK, the burning end ICEDAT, and the burning end ICE RST of the main control chip U1. The main control chip U1 is a core component of the anti-counterfeiting identification circuit, and is respectively provided with firmware connected to the first modulation circuit 110, the first demodulation circuit 120, and the first switch circuit 300, and a burning connector is reserved for convenient production and debugging. The first modulation circuit 110 and the first demodulation circuit 120 perform code matching through the address code of the transmitting end TX and the receiving end RX, and identify and execute the bus on-off function, that is, the on-off switch end SW function of the first switch circuit 300.

[0065] In one implementation of the above embodiment, the first modulation circuit 110 includes a trigger circuit and a voltage regulating output circuit, wherein the voltage regulating output circuit is connected between the driving output terminal P1 and the power ground; the input terminal of the trigger circuit is connected to the first control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit; the trigger circuit receives a level signal from the first control unit and outputs an address code through the voltage regulating output circuit. In this embodiment, the trigger circuit receives a level signal from the first control unit, converts the level signal into a voltage signal through the voltage regulating output circuit, and outputs the voltage signal to the LED lamp; wherein the continuous voltage signal is the address code.

[0066] Specifically, the trigger circuit includes a first transistor Q1, the base of the first transistor Q1 is connected to the first control unit through the first resistor R1, the collector is connected to the voltage regulating output circuit, and the emitter is grounded. The trigger circuit receives the level signal of the first control unit through the base of the first transistor Q1, and then controls the voltage regulating output circuit;

[0067] Specifically, the voltage regulating output circuit includes a first MOS tube Q4, a second resistor R2, and a third resistor R3. The gate of the first MOS tube Q4 is respectively connected to the trigger circuit, the drain is connected to the driving output terminal P1 through the second resistor R2, and the source is grounded; the gate of the first MOS tube Q4 is also connected to the driving output terminal P1 through the third resistor R3. The gate of the first MOS tube Q4 controls the on and off of the first MOS tube Q4 by receiving the signal of the trigger circuit, thereby changing the voltage of the third driving output terminal P1.

[0068] In the first modulation circuit 110, the first resistor R1 is a current limiting resistor, the first transistor Q1 is an MMBT4401 transistor, which plays a reverse voltage role; the third resistor R3 is a pull-up resistor to provide a basic voltage for the gate of the first MOS transistor Q4; the first MOS transistor Q4 is an NMOS transistor, and the first MOS transistor Q4 is the main switch tube of the voltage regulation output circuit; the second resistor R2 is a dummy load resistor.

[0069] Acting on the first modulation circuit 110, the main control chip U1 sends the address code through the transmitter TX when it is powered on. When the transmitter TX is at a high level, the first transistor Q1 is turned on, the gate of the first MOS tube Q4 is at a low level, the second resistor R2-first MOS tube Q4-GND loop is disconnected, and VCC1 is the original working voltage, such as 36VDC; when the transmitter TX is at a low level, the first transistor Q1 is turned off, the gate of the first MOS tube Q4 is at a high level, the second resistor R2-first MOS tube Q4-GND loop is turned on, and the voltage VCC1-GND of the driving output terminal P1 is equal to the parallel second resistor R2 dummy load, the second resistor R2 consumes loop current, and the driving output terminal P1 voltage is pulled down to 32VDC.

[0070] In one implementation of the above embodiment, the first demodulation circuit 120 includes an energy storage circuit and a voltage regulating input circuit; the energy storage circuit and the voltage regulating input circuit are both connected between the drive output terminal P1 and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the first control unit; the energy storage circuit receives the voltage change of the drive output terminal P1, so that the voltage regulating input circuit outputs a confirmation code to the first control unit. In this embodiment, when the first control unit does not send a level signal, the energy storage device of the energy storage circuit has stored energy. When the LED lamp changes the voltage between the drive output terminal P1 and the drive input terminal P2, the voltage of the energy storage circuit is output to the voltage regulating input circuit, thereby affecting the potential change of the receiving end of the first control unit.

[0071] Specifically, the energy storage circuit includes a first diode D1, a second diode D2, and a first capacitor C1, and the voltage regulation input circuit includes a second triode Q2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a seventh resistor R7; one end of the first diode D1 is connected to the driving output end P1, the other end of the first diode D1 is connected to the second diode D2, the other end of the second diode D2 is respectively connected to the first capacitor C1, the fourth resistor R4, and the fifth resistor R5, the other ends of the first capacitor C1 and the fifth resistor R5 are grounded, and the other end of the fourth resistor R4 is connected to the base of the second triode Q2; the emitter of the second triode Q2 is connected to the driving output end P1, the collector of the second triode Q2 is respectively connected to the first control unit and the seventh resistor R7 through the sixth resistor, and the seventh resistor R7 is grounded. In this embodiment, in this embodiment, the first diode D1 and the second diode D2 are IN4148 diodes, and the tube voltage drop is about 0.7V; the first capacitor C1 is an electrolytic capacitor, which is an energy storage device; the fifth resistor R5 is a discharge resistor; the fourth resistor R4 is a current limiting resistor; the second transistor Q2 is a P-channel transistor; the sixth resistor R6 and the seventh resistor R7 are voltage dividing resistors.

[0072] Its working principle is that when the bus, i.e., the connection between the driving output terminal P1 and the driving input terminal P2, has a voltage of 36VDC under normal working conditions, the first diode D1 and the second diode D2 are turned on, the voltage across the first capacitor C1 is 34.6VDC, the base of the second transistor Q2 is <0.7V, and the turn-on condition is met, the second transistor Q2 is turned on, and the voltage divided by the sixth resistor R6 and the seventh resistor R7 to the receiving terminal RX of the first control unit is 5V, and the receiving terminal RX of the first control unit is at a high level; when the bus voltage is transiently pulled down to 32VDC, the voltage of the first capacitor C1 cannot suddenly change, and is slowly discharged, which is regarded as voltage maintenance, and the ideal voltage is still 34.6VDC. At this time, the first diode D1 and the second diode D2 are turned off, the base of the second transistor does not meet the turn-on condition, the second transistor Q2 is turned off, the sixth resistor R6 has no pull-up voltage, and the receiving terminal RX of the first control unit is set low by the seventh resistor R7.

[0073] In some embodiments, the first verification circuit 100 also includes a first power chip, the power input end of the first power chip is connected to the LED driver, and the power output end of the first power chip is connected to the first control unit; the power input end and the power output end of the first power chip are also connected to a filter capacitor. In one implementation of this embodiment, the power input end of the first power chip is connected to the LED driver, and the power output end of the first power chip is connected to the main control chip of the first verification circuit 100; in this embodiment, the first power chip is used to power the main control chip U1 of the first verification circuit 100, and the first power chip includes a power chip U2, the input end of the first power chip U2 is connected to the first input power supply, the output end of the first power chip U2 is connected to the main control chip U1 and outputs the second input power supply VCC2, and the input end and the output end of the first power chip U2 are both provided with a filter capacitor. The first power chip U2 can be model RT9068; the filter capacitor is used to filter clutter, and the first input power supply VCC1 takes the voltage at the bus bar, that is, the drive output end P1, and converts it to +5V to provide a basic power supply voltage for the main control chip U1.

[0074] In some embodiments, the first switch circuit includes a third triode and a second MOS tube, the base of the third triode is connected to the first verification circuit, the collector is connected to the gate of the second MOS tube, and the emitter is grounded; the drain of the second MOS tube is connected to the drive output terminal P1, and the source is connected to the drive input terminal P2. In this embodiment, the base of the third triode is connected to the first verification circuit 100, the collector is connected to the gate of the second MOS tube, and the emitter is grounded; the drain of the second MOS tube is connected to the drive output terminal, and the source is connected to the drive input terminal P2. In this embodiment, the first switch circuit 300 includes a third triode Q3 and a second MOS tube Q5, the base of the third triode Q3 is connected to the first verification circuit 100, the collector is connected to the gate of the second MOS tube Q5, and the emitter is grounded; the drain of the second MOS tube Q5 is connected to the drive output terminal P1, and the source is connected to the drive input terminal P2. The first switch circuit also includes an eighth resistor R8 and a ninth resistor R9, wherein the eighth resistor R8 is connected between the drain and the gate of the second MOS transistor Q5, and the ninth resistor R9 is connected between the base of the third triode Q3 and the first verification circuit 100. The first switch circuit 300 is provided in the LED driver and connected between the driving output terminal P1 and the driving input terminal P2.

[0075] Specifically, the first verification circuit 100 is applied, the control terminal SW of the main control chip U1 is at a low level by default, the third transistor Q3 is cut off, the ninth resistor R9 pulls up the base level of the third transistor Q3, the third transistor Q3 is turned on, and the bus loop is turned on; when the main control chip receives the startup address code within 200ms after being powered on, the control terminal SW maintains the original low level state; when the main control chip U1 does not receive the startup address code within 200ms after being powered on, the control terminal SW is set high, the third transistor Q3 is turned on, the gate of the second MOS tube Q5 is pulled low, the second MOS tube Q5 is cut off, the bus loop is disconnected, and the lamp cannot be lit.

[0076] See also Figure 2 , Figure 3 , Figure 4 , Figure 5 The present application also provides an LED lamp, including a second verification circuit 200 and a second switch circuit 400. The LED lamp is provided with a driving input terminal P2 connected to the driving output terminal P1 of the LED driver, and the second verification circuit 200 and the second switch circuit 400 are connected to the driving input terminal P2; the second verification circuit 200 controls the on and off of the second switch circuit 400 and sends a confirmation code to the LED driver by receiving an address code from the LED driver. In this embodiment, the driving output terminal P1 is the LED constant current driving power supply output terminal of the LED driver, and the driving input terminal P2 is the LED constant current driving power supply input terminal of the LED lamp, which is used to provide the working power supply of the LED lamp. The principle of the LED lamp can be the same as that of the LED driver, and the same circuit elements can be used to realize mutual verification. The second verification circuit 200 and the second switch circuit 400 are connected to the driving input terminal P2, and because the driving output terminal P1 is connected to the driving input, the second verification circuit 200 receives and identifies the address code of the LED driver and feeds back a confirmation code to the LED driver. The LED driver may be provided with a first verification circuit that sends an address code and receives a confirmation code; the LED driver of the present application communicates interactively with the LED lamp through the first verification circuit. The present application sets an LED lamp in the LED lamp, receives the address code of the LED driver through the second verification circuit 200 and sends a confirmation code to the LED driver at the same time, turns on the second switch circuit 400, and realizes anti-counterfeiting of the connected LED driver.

[0077] In some embodiments, the second verification circuit 200 includes a second control unit, and a second modulation circuit 210 and a second demodulation circuit 220 connected to the second control unit; the second control unit is also connected to the second switch circuit 400, and the second control unit receives the address code of the LED driver through the second demodulation circuit 220, and the second control unit outputs a confirmation code to the LED driver through the first modulation circuit 110, thereby controlling the on and off of the first switch circuit 300. In this embodiment, when the LED driver is connected to the LED lamp, the second control unit receives the address code of the LED driver through the second demodulation circuit 220, and outputs a confirmation code to the LED driver through the second modulation circuit 210, and the first control unit identifies the address code. If the confirmation code corresponds to the preset code, the second control unit controls the second switch circuit 400 to be continuously turned on; if the confirmation code is empty or cannot be identified, the second switch circuit 400 is turned off.

[0078] In one implementation of the above embodiment, the second control unit includes a main control chip, which is provided with a transmitting end, a receiving end, and a switch end. The transmitting end is connected to the second modulation circuit 210, the receiving end is connected to the second demodulation circuit 220, and the switch end is connected to the second switch circuit 400. In this embodiment, the main control chip can be any series of chips of the SN65HVD7x series / PIC16(L)F18xx series; the main control chip is provided with a program for sending and matching codes; the burning circuit of the main control chip U1 is burned, and the burning circuit includes a burning connector, the power end of the burning connector is connected to the second input power supply VCC2, and the burning output end of the burning connector is connected to the burning end ICE CLK, the burning end ICE DAT, and the burning end ICE RST of the main control chip of the second verification circuit 200. The main control chip U1 is a core component of the anti-counterfeiting identification circuit, and is respectively provided with firmware connected to the second modulation circuit 210, the second demodulation circuit 220, and the second switch circuit 400, and a burning connector is reserved for convenient production and debugging. The second modulation circuit 210 and the second demodulation circuit 220 perform code matching through the address code of the transmitting end TX and the receiving end RX, identify and execute the bus on-off function, that is, the on-off switch end SW function of the second switch circuit 400.

[0079] In one implementation of the above embodiment, the second modulation circuit 210 includes a trigger circuit and a voltage regulating output circuit, and the voltage regulating output circuit is connected between the driving input terminal P2 and the power ground; the input terminal of the trigger circuit is connected to the second control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit; in this embodiment, the trigger circuit receives a level signal from the second control unit, converts the continuous level signal into a voltage signal through the voltage regulating output circuit, and outputs it to the LED driver; wherein the continuous voltage signal is a confirmation code.

[0080] The trigger circuit receives the level signal from the second control unit and outputs the confirmation code through the voltage regulating output circuit.

[0081] Specifically, the trigger circuit includes a first transistor, the base of the first transistor is connected to the first control unit through a first resistor, the collector is connected to the voltage regulating output circuit, and the emitter is grounded. The trigger circuit receives the level signal of the second control unit through the base of the first transistor, and then controls the voltage regulating output circuit;

[0082] Specifically, the voltage regulation output circuit includes a first MOS tube, a second resistor, and a third resistor. The gate of the first MOS tube is respectively connected to the trigger circuit, the drain is connected to the driving input terminal P2 through the second resistor, and the source is grounded; the gate of the first MOS tube is also connected to the driving input terminal P2 through the third resistor. The gate of the first MOS tube controls the on and off of the first MOS tube by receiving the signal of the trigger circuit, thereby changing the voltage of the first driving output terminal P1.

[0083] In the second modulation circuit 210, the first resistor is a current limiting resistor, the first transistor is an MMBT4401 transistor, which plays a reverse voltage role; the third resistor is a pull-up resistor to provide a basic voltage for the gate of the first MOS tube; the first MOS tube is an NMOS tube, and the first MOS tube is the main switch tube of the voltage regulation output circuit; the second resistor is a dummy load resistor.

[0084] Acting on the second modulation circuit 210, the main control chip sends a confirmation code through the transmitter TX when powered on. When the transmitter TX is at a high level, the first transistor is turned on, the gate of the first MOS tube is at a low level, the second resistor-first MOS tube-GND loop is disconnected, and VCC0 is the voltage of the second verification circuit 200 receiving the LED driver and is also the working voltage of the second verification circuit 200, such as 36VDC; when the transmitter TX is at a low level, the first transistor is cut off, the gate of the first MOS tube is at a high level, the second resistor-first MOS tube-GND loop is turned on, and the voltage VCC0-GND transmitted from the drive output terminal P1 is equal to the parallel second resistor dummy load, the second resistor loses loop current, and the drive output terminal P1 voltage is pulled down to 32VDC.

[0085] In one implementation of the above embodiment, the second demodulation circuit 220 includes an energy storage circuit and a voltage regulating input circuit; the energy storage circuit and the voltage regulating input circuit are both connected between the driving input terminal P2 and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the second control unit; the energy storage circuit receives the voltage change of the driving input terminal P2, so that the voltage regulating input circuit outputs a confirmation code to the first control unit. In this embodiment, when the energy storage circuit is connected to the LED driver and the LED lamp, the energy storage device of the energy storage circuit stores electrical energy; when the LED driver changes the voltage between the driving output terminal P1 and the driving input terminal P2, the voltage of the energy storage circuit is output to the voltage regulating input circuit, thereby affecting the potential change of the receiving end of the first control unit.

[0086] Specifically, the energy storage circuit includes a first diode, a second diode, and a first capacitor, and the voltage regulating input circuit includes a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;

[0087] One end of the first diode is connected to the driving input terminal P2, the other end of the first diode is connected to the second diode, the other end of the second diode is respectively connected to the first capacitor, the fourth resistor, and the fifth resistor, the other ends of the first capacitor and the fifth resistor are grounded, and the other end of the fourth resistor is connected to the base of the second triode; the emitter of the second triode is connected to the driving input terminal P2, the collector of the second triode is respectively connected to the first control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded. In this embodiment, in this embodiment, the first diode and the second diode are IN4148 diodes, and the tube voltage drop is about 0.7V; the first capacitor is an electrolytic capacitor, which is an energy storage device; the fifth resistor is a discharge resistor; the fourth resistor is a current limiting resistor; the second triode is a P-channel triode; the sixth resistor and the seventh resistor are voltage divider resistors.

[0088] Its working principle is that when the bus, i.e., the connection between the drive output terminal P1 and the drive input terminal P2, has a voltage of 36VDC in normal operation, the first diode and the second diode are turned on, the voltage across the first capacitor is 34.6VDC, the base of the second transistor is <0.7V, and the conduction condition is met, the second transistor is turned on, and the voltage is divided to 5V at the receiving end through the sixth resistor and the seventh resistor R7, and the receiving end of the second control unit is at a high level; when the bus voltage is transiently pulled down to 32VDC, the voltage of the first capacitor cannot change suddenly, and is discharged slowly, which is regarded as voltage maintenance, and the ideal voltage is still 34.6VDC. At this time, the first diode and the second diode are turned off, the base of the second transistor does not meet the turn-on condition, the second transistor is turned off, the sixth resistor has no pull-up voltage, and the receiving end of the second control unit is set low by the seventh resistor.

[0089] In some embodiments, the power input end of the second power chip is connected to the LED lamp, and the power output end of the second power chip is connected to the main control chip of the second verification circuit 200. In this embodiment, the second power chip is used to power the main control chip of the second verification circuit 200, and the second power chip includes a second power chip, the input end of the first power chip is connected to the high potential end VCC0 of the second verification circuit 200, the output end of the second power chip is connected to the main control chip and outputs the second input power VCC2, and the input end and output end of the second power chip are both provided with a filter capacitor. The second power chip can be model RT9068; the filter capacitor is used to filter clutter, and the first input power VCC1 takes the voltage of VCC0 at the drain of the second MOS tube of the bus bar, i.e., the second verification circuit 200, and converts it to +5V to provide a basic power supply voltage for the main control chip of the second verification circuit 200.

[0090] The first switch circuit 300 includes a third triode and a second MOS tube. The base of the third triode is connected to the first verification circuit 100 or the second verification circuit 200, the collector is connected to the gate of the second MOS tube, and the emitter is grounded; the drain of the second MOS tube is connected to the drive output terminal P1, and the source is connected to the drive input terminal P2. In this embodiment, the second switch circuit 400 includes a third triode and a second MOS tube. The base of the third triode is connected to the second verification circuit, the collector is connected to the gate of the second MOS tube, and the emitter is grounded; the drain of the second MOS tube is connected to the drive output terminal P1, and the source is connected to the drive input terminal P2. The second switch circuit also includes an eighth resistor and a ninth resistor. The eighth resistor is connected between the drain and the gate of the second MOS tube, and the ninth resistor is connected between the base of the third triode and the second verification circuit 200. The second switch circuit 400 is arranged in the LED lamp and connected between the drive output terminal P1 and the drive input terminal P2.

[0091] Specifically, the second verification circuit 200 is used, the control terminal of the main control chip is set to a high level by default, the second MOS tube is turned off, and the bus circuit at the lamp end is disconnected, so that the host and slave code matching process works silently within 200ms after power-on, and the LED lamp will not be lit. When the address code is parsed, the control terminal of the main control chip is set to a low level, the second MOS tube is turned on, and the LED lamp works normally.

[0092] exist Figure 6 , Figure 7 In the illustrated embodiment, the present application further discloses a verification system, including an LED driver, an LED lamp,

[0093] LED driver, including the above-mentioned LED driver;

[0094] LED lamps, including the above-mentioned LED lamps;

[0095] The driving output terminal P1 of the LED driver is connected to the driving input terminal P2 of the LED lamp. The second verification circuit controls the on and off of the second switch circuit by receiving the address code of the LED driver and outputs a confirmation code to the LED driver; the LED driver controls the on and off of the first switch circuit by receiving the confirmation code.

[0096] In this embodiment, the verification circuit of the present application is suitable for the LED constant current drive to the lamp end, that is, between the drive output end P1 of the LED driver and the drive input end P2 of the LED lamp. The core point is that the anti-counterfeiting identification circuit is added to the output of the LED constant current drive and the input of the LED lamp. The anti-counterfeiting identification circuit of the drive output end P1 of the LED driver can be defined as the first verification circuit 100 (host), and the anti-counterfeiting identification circuit of the input end of the LED lamp is defined as the second verification circuit 200 (slave). When the LED constant current drive outputs voltage, the main control chip of the first verification circuit 100 actively sends the agreed signal, which is transmitted to the LED lamp at both ends of LED+ / LED- through a DC load mode. The second verification circuit 200 at the input end of the LED lamp decodes the received signal. If the analysis and identification are correct, a string of startup address codes will be sent to the transmitting main control circuit of the previous stage, and the code handshake will be mutually matched. After success, the second switch circuit 400 will be turned on and the LED lamp will light up normally. If the code matching fails or the circuit is missing in the next stage, the first switch circuit 300 will be disconnected and the LED lamp cannot be lit. In this application, a first verification circuit 100 and a second verification circuit 200 are arranged between the LED driver and the LED lamp. The first control unit of the first verification circuit 100 sends an address code to the second verification circuit 200 through the first demodulation circuit 120. The second decoding circuit of the second verification circuit 200 receives the address code and transmits it back to the second control unit for identification. After the second control unit identifies it, it notifies the second switch circuit 400 to turn on. At the same time, the first decoding circuit outputs a confirmation code to the first demodulation circuit 120 and controls the first switch circuit 300 to be continuously turned on, completing the electrical verification of the LED lamp and the LED driver. This effectively prevents counterfeiting of LED lamp products and prevents consumers from using counterfeit and shoddy products and causing safety hazards.

[0097] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation methods of the present application. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present application should be included in the protection scope of the claims of the present application.

Claims

1. An LED driver, characterized in that comprising a first verification circuit and a first switch circuit, The LED driver is provided with a driving output end connected to the driving input end of the LED lamp, and the first verification circuit and the first switch circuit are connected to the driving output end; The first verification circuit controls the on and off of the first switch circuit by sending an address code to the LED lamp and receiving a confirmation code from the LED lamp; Wherein, the first verification circuit includes a first control unit, and a first modulation circuit and a first demodulation circuit connected to the first control unit; The first control unit is also connected to the first switch circuit. The first control unit sends an address code to the LED lamp through the first modulation circuit, and the first control unit receives a confirmation code from the LED lamp through the first demodulation circuit, thereby controlling the on and off of the first switch circuit. The first modulation circuit and the first demodulation circuit are connected to the drive output terminal through the first switch circuit. The first modulation circuit includes a trigger circuit and a voltage regulating output circuit, wherein the voltage regulating output circuit is connected between the driving output terminal and the power ground; the input terminal of the trigger circuit is connected to the first control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit; the trigger circuit outputs an address code through the voltage regulating output circuit by receiving a level signal from the first control unit; The first demodulation circuit includes an energy storage circuit and a voltage regulating input circuit; the energy storage circuit and the voltage regulating input circuit are both connected between the drive output terminal and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the first control unit; the energy storage circuit receives the voltage change of the drive output terminal, so that the voltage regulating input circuit sends a confirmation code to the first control unit.

2. The LED driver according to claim 1, characterized in that: The first control unit includes a main control chip, which is provided with a transmitting end, a receiving end, and a switch end. The transmitting end is connected to the first modulation circuit, the receiving end is connected to the first demodulation circuit, and the switch end is connected to the first switch circuit.

3. The LED driver according to claim 1, characterized in that: The trigger circuit comprises a first transistor, the base of the first transistor is connected to the first control unit via a first resistor, the collector is connected to the voltage regulating output circuit, and the emitter is grounded.

4. The LED driver according to claim 1, characterized in that: The voltage regulation output circuit includes a first MOS tube, a second resistor, and a third resistor. The gate of the first MOS tube is respectively connected to the trigger circuit, the drain is connected to the driving output end through the second resistor, and the source is grounded; the gate of the first MOS tube is also connected to the driving output end through a third resistor.

5. The LED driver according to claim 1, characterized in that: The energy storage circuit includes a first diode, a second diode, and a first capacitor, and the voltage regulating input circuit includes a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; One end of the first diode is connected to the driving output end, the other end of the first diode is connected to the second diode, the other end of the second diode is respectively connected to the first capacitor, the fourth resistor, and the fifth resistor, the other ends of the first capacitor and the fifth resistor are grounded, and the other end of the fourth resistor is connected to the base of the second transistor; the emitter of the second transistor is connected to the driving output end, the collector of the second transistor is respectively connected to the first control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded.

6. The LED driver according to claim 1, characterized in that: The first verification circuit also includes a first power chip, The power input end of the first power chip is connected to the LED driver, and the power output end of the first power chip is connected to the first control unit; the power input end and the power output end of the first power chip are also connected to a filter capacitor.

7. The LED driver according to claim 1, characterized in that: The first switch circuit includes a third transistor and a second MOS transistor. The base of the third transistor is connected to the first verification circuit, the collector is connected to the gate of the second MOS transistor, and the emitter is grounded; the drain of the second MOS transistor is connected to the driving output end, and the source is connected to the driving input end.

8. LED lamp, characterized in that, comprising a second verification circuit and a second switch circuit, The LED lamp is provided with a driving input end connected to the driving output end of the LED driver, and the second verification circuit and the second switch circuit are connected to the driving input end; The second verification circuit controls the on and off of the second switch circuit and sends a confirmation code to the LED driver by receiving an address code from the LED driver; The second verification circuit includes a second control unit, and a second modulation circuit and a second demodulation circuit connected to the second control unit; The second control unit is also connected to the second switch circuit, the second control unit receives the address code of the LED driver through the second demodulation circuit, and the second control unit outputs a confirmation code to the LED driver through the first modulation circuit, thereby controlling the on and off of the first switch circuit; The second modulation circuit includes a trigger circuit and a voltage regulation output circuit. The voltage regulating output circuit is connected between the driving input terminal and the power ground; the input terminal of the trigger circuit is connected to the second control unit, and the control terminal of the trigger circuit is connected to the voltage regulating output circuit; The trigger circuit outputs a confirmation code through the voltage regulating output circuit by receiving a level signal from the second control unit; The second demodulation circuit includes an energy storage circuit and a voltage regulation input circuit; The energy storage circuit and the voltage regulating input circuit are both connected between the driving input terminal and the power ground, the energy storage circuit is also connected to the voltage regulating input circuit, and the voltage regulating input circuit is also connected to the second control unit; The energy storage circuit receives the voltage change of the driving input terminal, so that the voltage regulating input circuit outputs an address code to the second control unit.

9. The LED lamp according to claim 8, characterized in that: The second control unit includes a main control chip, which is provided with a transmitting end, a receiving end, and a switch end. The transmitting end is connected to the second modulation circuit, the receiving end is connected to the second demodulation circuit, and the switch end is connected to the second switch circuit.

10. The LED lamp according to claim 8, characterized in that: The trigger circuit comprises a first transistor, the base of the first transistor is connected to the second control unit via a first resistor, the collector is connected to the voltage regulating output circuit, and the emitter is grounded.

11. The LED lamp according to claim 8, characterized in that: The voltage regulation output circuit includes a first MOS tube, a second resistor, and a third resistor. The gate of the first MOS tube is respectively connected to the trigger circuit, the drain is connected to the driving input terminal through the second resistor, and the source is grounded; the gate of the first MOS tube is also connected to the driving input terminal through a third resistor.

12. The LED lamp according to claim 8, characterized in that: The energy storage circuit includes a first diode, a second diode, and a first capacitor, and the voltage regulating input circuit includes a second triode, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor; One end of the first diode is connected to the driving input end, the other end of the first diode is connected to the second diode, the other end of the second diode is respectively connected to the first capacitor, the fourth resistor, and the fifth resistor, the other ends of the first capacitor and the fifth resistor are grounded, and the other end of the fourth resistor is connected to the base of the second transistor; the emitter of the second transistor is connected to the driving input end, the collector of the second transistor is respectively connected to the second control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded.

13. The LED lamp according to claim 8, characterized in that: The second verification circuit also includes a second power chip, The power input end of the second power chip is connected to the LED driver, and the power output end of the second power chip is connected to the second control unit; the power input end and the power output end of the second power chip are also connected to a filter capacitor.

14. The LED lamp according to claim 8, characterized in that: The second switch circuit includes a third triode and a second MOS tube. The base of the third triode is connected to the second verification circuit, the collector is connected to the gate of the second MOS tube, and the emitter is grounded; the drain of the second MOS tube is connected to the driving output end, and the source is connected to the driving input end.

15. A verification system, characterized in that: The LED driver comprises any one of claims 1 to 7 and the LED lamp comprises any one of claims 8 to 14; The driving output end of the LED driver is connected to the driving input end of the LED lamp. The second verification circuit controls the on-off of the second switch circuit by receiving the address code of the first verification circuit and outputs a confirmation code to the first verification circuit; the first verification circuit controls the on-off of the first switch circuit by receiving the confirmation code.

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