Led straight tube lamp with switch and / or indicator light

Abstract

The application provides a LED straight tube lamp with a switch and / or an indicator light, comprising a lamp tube, an LED light bar and a driving circuit being installed in the lamp tube, the lamp tube comprising a tube body and end covers being fixed at both ends of the tube body, two pins being respectively fixed on each end cover; the tube body comprising a bottom shell and a light-transmitting cover being radially buckled to each other, the LED light bar being fixed on the bottom shell; the light-transmitting cover being provided with a avoiding opening, the switch and / or the indicator light being exposed to the avoiding opening. The LED straight tube lamp with the switch and / or the indicator light is convenient to assemble, and the original size of the straight tube lamp is slightly changed.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of lighting devices, in particular to LED straight tube lamps with switches and / or indicator lights. BACKGROUND

[0002] The fluorescent tube with ballast is provided with pins at both ends. With the wide use of replacement LED lamps, in order to make full use of the original lamp holder and other fixed equipment and minimize the circuit modification, the LED tube is also provided with two pins at both ends, which can be directly plugged into the previous fluorescent lamp holder.

[0003] In order to enable users to more flexibly control the working state of LED straight tube lamps, such as adjusting brightness and switching the power supply branch of LED, various LED straight tube lamps with switches and / or indicator lights have appeared. Most of the existing LED straight tube lamps install switches or indicator lights on end covers. One type installs switches on the same side of the pins, which is less safe. The other type is installed on the peripheral surface of the end cover. For small LED straight tube lamps, the peripheral surface space of the original end cover is not enough, so the end cover needs to be lengthened, and the overall size of the straight tube lamp needs to be redesigned to meet the standard, and the assembly process of the LED straight tube lamp is complex. SUMMARY

[0004] The present application provides an LED straight tube lamp with a switch and / or an indicator light, which is easy to assemble and has less modification to the original size of the straight tube lamp.

[0005] The LED straight tube lamp with a switch and / or an indicator light comprises a lamp tube, an LED light bar and a driving circuit installed in the lamp tube, the lamp tube comprises a tube body and end covers fixed at both ends of the tube body, and two pins are respectively fixed on each end cover; the tube body comprises a bottom shell and a light-transmitting cover which are mutually buckled along the radial direction, and the LED light bar is fixed on the bottom shell; the light-transmitting cover is provided with a avoiding opening, and the switch and / or the indicator light are exposed to the avoiding opening.

[0006] The following also provides several optional modes, but not as an additional limitation to the above overall scheme, just a further supplement or preferred, without technical or logical contradiction, each optional mode can be combined with the above overall scheme, and can also be combined between multiple optional modes.

[0007] Optionally, the inner wall of the light-transmitting cover is provided with a positioning groove, a circuit board is fixed in the positioning groove, and the switch and / or the indicator light are fixed on the circuit board.

[0008] Optionally, the positioning groove is two grooves arranged oppositely and extending along the length direction of the lamp tube, and the two opposite sides of the circuit board are inserted into the corresponding positioning grooves.

[0009] Optionally, the bottom shell is provided with a first clamping groove on the outer wall of the two opposite sides in the radial direction, the light-transmitting cover is provided with a clamping tongue matched with the first clamping groove, the bottom shell is provided with a second clamping groove on the inner wall of the two opposite sides in the radial direction, and the LED light bar comprises a substrate and LEDs fixed on the substrate, and the substrate is clamped and fixed in the second clamping groove.

[0010] Optionally, the bottom shell is provided with a first clamping groove on the outer wall of the two opposite sides in the radial direction, the light-transmitting cover is provided with a clamping tongue matched with the first clamping groove, the bottom shell is provided with a second clamping groove on the inner wall of the two opposite sides in the radial direction, and the LED light bar comprises a substrate and LEDs fixed on the substrate, and the substrate is clamped and fixed in the second clamping groove.

[0011] Optionally, the bottom shell is provided with a first clamping groove on the outer wall of the two opposite sides in the radial direction, the light-transmitting cover is provided with a clamping tongue matched with the first clamping groove, the bottom shell is provided with a second clamping groove on the inner wall of the two opposite sides in the radial direction, and the LED light bar comprises a substrate and LEDs fixed on the substrate, and the substrate is clamped and fixed in the second clamping groove.

[0012] Optionally, the bottom shell is provided with a first clamping groove on the outer wall of the two opposite sides in the radial direction, the light-transmitting cover is provided with a clamping tongue matched with the first clamping groove, the bottom shell is provided with a second clamping groove on the inner wall of the two opposite sides in the radial direction, and the LED light bar comprises a substrate and LEDs fixed on the substrate, and the substrate is clamped and fixed in the second clamping groove.

[0013] Optionally, the driving circuit comprises a signal branch, a commercial power branch and an emergency branch with a charging circuit and an energy storage module, the signal branch is coupled with the lamp pin at one end of the lamp tube for transmitting a driving signal to control the on-off of the commercial power branch, the commercial power branch and the charging circuit are coupled with the lamp pin at the other end of the lamp tube for respectively transmitting power to the LED light bar for power supply and to the energy storage module for charging, when the LED straight tube lamp is powered on, the external power supply supplies power to the LED light bar through the commercial power branch and charges the energy storage module through the charging circuit, and when the LED straight tube lamp is powered off, the energy storage module supplies power to the LED light bar.

[0014] Optionally, the output end of the charging circuit is coupled with a charging indication module with an indicator light, and the indicator light is exposed to the avoiding opening.

[0015] Optionally, the energy storage module has a fifth switch for controlling the charging and discharging of the controller, and the fifth switch is exposed to the avoiding opening.

[0016] The LED straight tube lamp with a switch and / or an indicator light provided by the present application is convenient to assemble and has little change to the original size of the straight tube lamp. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1a It is a schematic diagram of the principle of the prior art LED emergency lamp;

[0018] Figure 1b It is a schematic diagram of the principle of an embodiment of the emergency branch of the present application;

[0019] Figure 2a It is a schematic diagram of the principle of an embodiment of the LED emergency lamp of the present application;

[0020] Figure 2b It is a schematic diagram of the principle of an embodiment of the LED lamp of the present application;

[0021] Figure 3 Schematic diagram of a lighting system according to an embodiment of the application;

[0022] Figure 4 Schematic diagram of a lighting system according to an embodiment of the application;

[0023] Figure 5 Schematic diagram of a LED emergency light according to an embodiment of the application;

[0024] Figure 6a Schematic diagram of a LED emergency light according to an embodiment of the application;

[0025] Figure 6b Schematic diagram of a LED emergency light according to an embodiment of the application;

[0026] Figure 7 Schematic diagram of a LED emergency light according to an embodiment of the application;

[0027] Figure 8 Schematic diagram of a LED emergency light according to an embodiment of the application;

[0028] Figure 9 Schematic diagram of a LED emergency light according to an embodiment of the application;

[0029] Figure 10 Schematic diagram of a lighting system according to an embodiment of the application;

[0030] Figure 11 Circuit diagram of a second rectification and filtering module in a LED emergency light according to the application;

[0031] Figure 12 Circuit diagram of a first switch to constant current module in a LED emergency light according to the application;

[0032] Figure 13 Circuit diagram of a control module to constant current module in a LED emergency light according to the application;

[0033] Figure 14 Circuit diagram of a constant voltage module in a LED emergency light according to the application;

[0034] Figure 15 Circuit diagram of a constant current module in a LED emergency light according to the application;

[0035] Figure 16 Circuit diagram of an energy storage module in a LED emergency light according to the application;

[0036] Figure 17 Circuit diagram of a boost module in a LED emergency light according to the application;

[0037] Figure 18Circuit diagram of the control module of the LED emergency light of the present application

[0038] Figure 19 Schematic diagram of the three-dimensional structure of the LED emergency light of the present application

[0039] Figure 20 Partial exploded view of the LED emergency light of the present application

[0040] Figure 21 Schematic diagram of the internal structure of the LED emergency light of the present application

[0041] Figure 22 Partial exploded view of the LED emergency light of the present application

[0042] Figure 23 Flow chart of the control method of the LED emergency light of the present application

[0043] Figure 24 Circuit diagram of the constant current module of one embodiment of the LED emergency light of the present application

[0044] The reference signs are explained as follows:

[0045] 1, tube body; 11, bottom shell; 111, first clamping groove; 112, second clamping groove; 113, mounting chamber; 114, heat dissipation rib; 12, light-transmitting cover; 121, clamping tongue; 13, mounting section; 131, positioning groove; 132, clamping tongue; 2, end cover; 21, pin; 3, end cover; 31, pin; 4, LED light bar; 5, circuit board; 51, fifth switch; 52, indicator light; 53, third switch. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0047] It should be noted that when a component is referred to as being “connected” with another component, it can be directly connected with the other component or there can be a middle component. When a component is referred to as being “disposed on” another component, it can be directly disposed on the other component or there can be a middle component.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0049] Referring to Figure 1a , a conventional LED emergency light, its driving circuit includes a mains branch and an emergency branch with an energy storage module, when powered on, the external power supply supplies power to the LED via the mains branch, and when powered off, the LED is powered by the energy storage module.

[0050] Referring to Figure 1b , most of the emergency branch also includes a charging circuit, when powered on, the external power supply charges the energy storage module via the charging circuit. The power on or off refers to whether the LED emergency light is connected to the external power supply, which can be a DC power supply or an AC power supply.

[0051] Some LED emergency lights (such as straight tube lamps) have two power terminals, the mains branch is coupled to both power terminals at the same time, when one of the power terminals is connected to the power supply, if the operator touches the other power terminal, there is a risk of electric shock.

[0052] To solve the above problems, referring to Figure 2a , an embodiment of the present application provides an LED emergency light, including an LED and a driving circuit, the driving circuit includes a signal branch, a mains branch and an emergency branch with an energy storage module, when powered on, the external power supply supplies power to the LED via the mains branch, and when powered off, the LED is powered by the energy storage module, the LED emergency light has two power terminals, which are the first terminal and the second terminal respectively, the signal branch is coupled to the first terminal, and is used for externally transmitting a driving signal to control the on-off of the mains branch; the mains branch is coupled to the second terminal, and is used for transmitting power to supply power to the LED, only when both power terminals are powered on, the mains branch can be turned on to supply power to the LED, thereby avoiding the risk of electric shock.

[0053] In this embodiment, the power for the LED lamp to work comes from the second terminal, and the first terminal can be regarded as a control terminal, by transmitting a driving signal to control whether the mains branch is turned on to supply power to the LED, for example, a control element (such as a switch, etc.) that plays a role of on-off circuit can be arranged in the mains branch, and the control element is controlled by the external driving signal from the first terminal.

[0054] Some LED lamps with two power terminals do not need to have an emergency function, in order to simplify the circuit, referring to Figure 2bThe embodiment of the application further provides an LED lamp, comprising an LED and a driving circuit, the LED lamp has two power connection ends, which are a first end and a second end respectively, the driving circuit comprises a power supply branch and a signal branch, wherein the signal branch is coupled with the first end and is used for transmitting a driving signal to control the on-off of the power supply branch; the power supply branch is coupled with the second end and is used for transmitting power to supply power to the LED, and only when both the two power connection ends are electrified, the power supply branch can be turned on to supply power to the LED.

[0055] In one embodiment, referring to Figure 5 The power supply branch comprises a second rectification and filtering module and a constant current module which are coupled in sequence, and the second end is connected to AC power, and the AC power is converted into DC power through the second rectification and filtering module, and then the constant current module is used to supply power to the LED. The constant current module is used to supply power to the LED in accordance with the characteristic that the brightness of the LED is affected by the current. As for the constant current module itself, conventional technologies can be used, and improved ways are provided in some embodiments below.

[0056] In one embodiment, referring to Figure 6a The constant current module comprises a freewheeling unit, a switching element and a first controller which is used to control the on-off of the switching element and is coupled between the second rectification and filtering module and the LED, and a first control element is coupled between the power supply end of the second rectification and filtering module and the first controller. When the first control element is not electrified and is turned off, the second rectification and filtering module cannot supply power to the first controller, so that the switching element is turned off, and the constant current module cannot work normally, i.e., cannot supply power to the LED. Conversely, when the first control element is electrified and is turned on, the constant current module can work normally and can supply power to the LED.

[0057] The constant current module further comprises a sampling unit which collects a current signal from the output end of the switching element and feeds back to the first controller, so as to control the on-off of the switching element. The switching element is generally a MOS tube.

[0058] In one embodiment, referring to Figure 6b The signal branch comprises a first rectification and filtering unit and a first optocoupler which are coupled in sequence, and the first end is connected to AC power, and the AC power is converted into DC power through the first rectification and filtering unit, and then the constant current module is used to control the power supply branch. The first optocoupler is used to realize isolation effect, increase the grounding resistance of the two ends of the lamp tube and avoid electric leakage.

[0059] In one embodiment, the first end is connected to DC power and is coupled with the power supply branch, i.e., the first rectification and filtering module is omitted.

[0060] In one embodiment, referring to Figure 5The emergency branch includes a second rectification filter module, a constant voltage module and an energy storage module coupled in sequence. The second rectification filter module and the constant voltage module constitute a charging circuit. The external power supply supplies power to the energy storage module through the second rectification filter module and the constant voltage module in sequence. If the external power supply is direct current, the energy storage module can be directly charged without the second rectification filter module. The energy storage module generally includes a battery pack and other energy storage elements, and the constant voltage module is more conducive to charge and discharge management.

[0061] Referring to Figure 5 In order to simplify the circuit, in one embodiment, the second rectification filter module is shared by the power supply branch and the emergency branch, that is, the output end of the second rectification filter module supplies power to the constant voltage module and the constant current module at the same time.

[0062] In one embodiment, the energy storage module has a signal input end for detecting the power supply signal. When the power supply is off, the energy storage module supplies power to the LED. When the power supply is on, the energy storage module stops supplying power to the LED. In one embodiment, the signal input end of the energy storage module is coupled to the charging circuit. It is obvious that it can also be coupled to the power supply branch.

[0063] The LED lamp includes a mechanical structure part and a circuit part. As far as the mechanical structure itself is concerned, it does not affect the implementation of the technical solution of the present application. Of course, the present application also gives an improved way in the following.

[0064] Based on the above driving circuit and the LED emergency lamp, one embodiment of the present application further provides a power supply system with an LED emergency lamp. The content shown in the drawings and the corresponding text description can be regarded as the disclosure of the corresponding parts of the other two, regardless of the driving circuit, the LED emergency lamp or the power supply system.

[0065] The power supply system with an LED emergency lamp in the embodiment includes the LED emergency lamp of the present application and an alternating current line coupled to each power terminal of the LED emergency lamp.

[0066] Referring to Figure 3 In one embodiment, a first switch is installed on the alternating current line coupled to the first end for generating a driving signal. The first switch can be triggered on site or combined with remote control. The first switch can be installed in the indoor wall, the lamp holder or the related electrical system.

[0067] The on-off state of the first switch also determines the presence or absence of the driving signal. For example, the first switch is set to be always on. When the LED emergency lamp needs to be used, a driving signal is sent to the power supply branch by triggering the first switch, so that the power supply branch is turned on. Since the second end always supplies power to the LED through the power supply branch, the LED can be turned on as soon as it is turned on.

[0068] Referring to Figure 12The first switch is coupled to one of the terminal pins of the first end, and a fuse F3 can be connected in series with the terminal pin. The two terminal pins of the first end can be connected with a pressure-sensitive resistor RV2. The first rectification and filtering module uses a bridge stack BD2. The filtering is performed by a capacitor C26 and a resistor R36. The rectified signal is input to the primary side of a first optocoupler U4. The primary side of the first optocoupler is connected with a resistor R35, a resistor R35', and a capacitor C28. The secondary side of the first optocoupler is connected to a constant current module.

[0069] Since the first end is only used for control, the filtering capacitor in the first rectification and filtering module can be a conventional capacitor C26, instead of an electrolytic capacitor, thereby saving cost, prolonging service life, and reducing safety hazards.

[0070] Referring to Figure 4 In one embodiment, a first switch is installed on the AC line coupled to the first end to generate a driving signal. A second switch is installed on the AC line coupled to the second end to cut off the power supply and switch the driving circuit to be powered by the energy storage module.

[0071] The on-off of the second switch can directly affect the power supply of the power supply branch. If real-time power supply is required, the second switch can be set to a normally closed state. The second switch can also be used to actively test the emergency branch. The second end is disconnected from the power supply branch, and the energy storage module is switched to directly power the LED, thereby detecting whether the emergency branch can be normally used in advance.

[0072] In one embodiment, the second switch is a normally closed switch. It can be installed in the indoor wall, lamp holder or related electrical system.

[0073] Referring to Figure 11 The second switch is coupled to one of the terminal pins of the second end. Each terminal pin can be connected in series with a fuse F1 and a fuse F2, respectively. The two terminal pins of the second end can be connected with a pressure-sensitive resistor RV1. The signal is first input to a first EMI filter circuit, which includes an inductor LM1, an inductor LM2, a capacitor CX1, a capacitor CX2, a resistor R1, a resistor R2, and a resistor R2'. The signal is then input to a bridge stack BD1 for rectification, and then input to a second EMI filter circuit, which includes an inductor L1, a resistor R3, a capacitor C1, and a capacitor C2. The filtered signal is supplied to a constant current module and a constant voltage module.

[0074] In one embodiment, the constant current module comprises a first transformer, a primary side of the first transformer is coupled to the second rectification and filtering module, and the primary side of the first transformer is controlled by the first controller. In one embodiment, the first controller is powered by the second rectification and filtering module. In one embodiment, the first controller is also powered by the feedback from the secondary side of the first transformer. In one embodiment, a first control element is coupled between the second rectification and filtering module and the power supply terminal of the first controller, and the first control element is controlled by the driving signal from the first terminal.

[0075] Referring to Figure 15 , the constant current module comprises a first transformer T2, a MOS tube Q2 is connected in series to the primary side of the first transformer T2, and the gate of the MOS tube Q2 is connected to and controlled by the first controller U2. For example, the first controller U2 can adopt an MT7933 chip.

[0076] The power supply terminal of the first controller U2 is pin 5, the second rectification and filtering module supplies power to pin 5 through a resistor R34, a resistor R33, a resistor R33', and a triode Q3 in sequence. After the feedback from the secondary side of the first transformer T2, pin 5 is supplied with power through a diode D7, a resistor 30, and a triode Q3.

[0077] In the initial stage of power-up, the first controller U2 is directly powered by the second rectification and filtering module, and when the first transformer T2 is in stable operation, the feedback from the secondary side is used for power supply, which can further ensure the stability of operation and energy supply.

[0078] The triode Q3 can be regarded as a first control element, and whether it is turned on or not is also related to the driving signal from the first terminal, i.e., the signal of the first optocoupler.

[0079] After power-up, due to the absorption and energy storage of the electrolytic capacitor CD3, the voltage on the left side of the resistor R31 (according to the orientation in the figure) rises slightly delayed, and the conduction of the MOS tube Q4 is equivalent to the base of the triode Q3 being grounded, i.e., the triode Q3 cannot supply power to the first controller U2, which is equivalent to the constant current module being turned off and unable to work.

[0080] If the first switch is triggered, the first optocoupler will input a low level to the gate of the MOS tube Q4, so that the MOS tube Q4 is turned off, which means that the base voltage of the triode Q3 rises, i.e., the triode Q3 is turned on to supply power to the first controller U2, so that the constant current module normally operates to supply power to the LED.

[0081] In one embodiment, the constant voltage module comprises a second transformer, a primary side of the second transformer is coupled to the second rectification and filtering module, and the primary side of the second transformer is controlled by the second controller. In one embodiment, the second controller is powered by the second rectification and filtering module. In one embodiment, the second controller is also powered by the feedback from the secondary side of the second transformer.

[0082] Referring to Figure 14The constant-voltage module comprises a second transformer T1, and a MOS tube Q1 is connected in series to the primary side of the second transformer, and the gate of the MOS tube Q1 is connected to and controlled by the second controller U1. For example, the second controller U1 can adopt an MT7990 chip.

[0083] The power supply end of the second controller U1 is pin 3, and the second rectification and filtering module supplies power to pin 3 through a resistor R4, a resistor R5, and a resistor R5' in sequence. After feedback of the secondary side of the second transformer T1, power is supplied to pin 3 via a diode D2 and a resistor R12.

[0084] In the initial stage of power-on, the second controller U1 is directly powered by the second rectification and filtering module, and when the second transformer T1 is in stable operation, power is supplied by the feedback of the secondary side, which can further ensure the stability of operation and energy supply.

[0085] Referring to Figure 6a In one embodiment, the driving circuit further comprises a control module coupled to the mains branch for obtaining or releasing the off control of the mains branch. In one embodiment, the control module is coupled to the constant-current module in the mains branch for obtaining or releasing the off control of the constant-current module.

[0086] The control module controls the mains branch through the constant-current module. The control mainly is to control the constant-current module in priority to the driving signal, or release the priority, and when the off control is obtained, the driving signal can be shielded, that is, the first switch no longer functions, and the first switch can normally function to perform the opening and closing operation.

[0087] In one embodiment, referring to Figure 6b The control module is coupled to the constant-current module through a second optocoupler. In one embodiment, the off control is in priority to the control of the constant-current module by the driving signal, that is, in priority to the on-off control of the constant-current module by the first switch.

[0088] Referring to Figure 13 The control module is connected to the primary side of the second optocoupler U3 through a resistor R37, and the secondary side of the second optocoupler U3 is connected to the constant-current module. When the second optocoupler U3 is triggered by the control module, a low-level signal can be input to the constant-current module. In combination with the foregoing, the low-level signal is connected to the base of the triode Q3, that is, the triode Q3 cannot supply power to the first controller U2, which is equivalent to that the control module obtains the off control of the constant-current module, that is, the constant-current module is turned off, and whether the first optocoupler has a signal or not.

[0089] When there is no low-level signal input to the second optocoupler U3, that is, the off control is released, whether the triode Q3 is turned on or not is still as described above, and is related to the conduction of the MOS tube Q4 and the first optocoupler signal.

[0090] Referring to Figure 24The second optocoupler U3 is coupled to the power supply end of the first controller U2 through a MOS tube Q8. The gate of the MOS tube Q8 is coupled to the secondary side of the second optocoupler U3, the drain of the MOS tube Q8 is grounded, and the source of the MOS tube Q8 is coupled to the base of the triode Q3.

[0091] When the control module sends a low level to the primary side of the second optocoupler U3, the secondary side of the second optocoupler U3 is cut off, the gate voltage of the MOS tube Q8 changes, which is equivalent to the second optocoupler U3 sending a high level to the gate of the MOS tube Q8, so that the MOS tube Q8 is turned on to make the base of the triode Q3 grounded, that is, the triode Q3 cannot supply power to the first controller U2, which is equivalent to the control module obtaining the off control of the constant current module, and no matter whether the first optocoupler has a signal or not.

[0092] In this way, when the control module is in sleep mode, there is a weak leakage current. This leakage current may be mistakenly considered as a high level output to trigger the second optocoupler U3, resulting in the shutdown of the constant current module. After connecting the MOS tube between the second optocoupler U3 and the base of the triode Q3, the control module must output a low level to be considered as a signal, so that even if the control module has a leakage current, the output high level will not affect the normal work of the constant current module.

[0093] In one embodiment, referring to Figure 6b The control module is further coupled to a third switch for indicating the control module to turn off the power supply branch of the city power to the LED and turn on the emergency branch to supply power to the LED.

[0094] The third switch can also be used as a test switch to detect whether the emergency branch can normally respond. The control module turns off the city power supply branch by turning off the constant current module through the second optocoupler. Of course, since the city power is not actually turned off, the control module will also send a signal to the emergency branch to supply power to the LED.

[0095] In one embodiment, a control element (such as a switch) for controlling the charging circuit to charge the energy storage module is arranged on the emergency branch, and the control element is controlled by the control module. When the control module disconnects the emergency branch through the control element, the charging circuit cannot charge the energy storage module, and the energy storage module supplies power to the LED.

[0096] In one embodiment, the third switch is a normally open switch, so it does not affect the normal work of the LED emergency lamp. In one embodiment, the third switch is installed on the lamp tube, which is convenient for control and on-site operation.

[0097] Referring to Figure 18 The control module can be a single-chip microcomputer U6, and the third switch is connected to pin 4 of the single-chip microcomputer U6. After the third switch is triggered, the single-chip microcomputer U6 sends a signal to the second optocoupler through pin 3 to turn off the constant current module.

[0098] To avoid the emergency branch and the mains branch supply power to the LED at the same time (i.e. common phenomenon), the on-off of the constant current module and the on-off of the emergency branch to supply power to the LED can be set in sequence, that is, the output time of the working time has difference. The consistency of the time difference can be ensured by the fact that the mains branch and the emergency branch share the second rectifier filter module in the foregoing embodiment.

[0099] In one embodiment, when the mains branch needs to be used to supply power, the control module first closes the emergency branch to supply power to the LED, and then releases the off control of the constant current module. When the emergency branch needs to be used to supply power, the control module first closes the constant current module to supply power to the LED and obtains the off control of the constant current module, and then opens the emergency branch to supply power to the LED.

[0100] Releasing the off control of the constant current module means that the first switch can normally access the on control of the constant current module. Without time sequence control, once the first switch is in the triggered state, it is possible that the emergency branch and the mains branch supply power to the LED at the same time, so the emergency branch to supply power to the LED should be closed first. Similarly, when switching to the emergency branch to supply power, the constant current module should be closed first.

[0101] Referring to Figure 7 In one embodiment, the energy storage module includes:

[0102] The energy storage element is coupled to the constant voltage module to store energy through the constant voltage module;

[0103] The boost module is coupled to the energy storage element and is used to boost the output of the energy storage element to supply power to the LED;

[0104] The switching module detects the output voltage of the constant voltage module to control the operation of the boost module.

[0105] In one embodiment, a fourth switch is coupled between the constant voltage module and the energy storage module, and the control module actively controls the on-off of the charging circuit in the emergency branch by controlling the on-off of the fourth switch. In one embodiment, the fourth switch adopts a normally closed mode. The fourth switch can adopt a MOS tube or other circuit devices that can realize on-off control. In one embodiment, the energy storage element can adopt a capacitor, a battery pack or other circuit devices that can realize energy storage. For example, in the battery pack mode, a charging and discharging management module and a temperature monitoring management module of the battery pack can also be configured by using conventional technology.

[0106] Referring to Figure 16 and Figure 18The pin 2 of the single-chip microcomputer U6 in the control module is a signal output terminal, and the on-off of the transistor Q5 can be controlled through the resistor R49. The fourth switch is a MOS tube Q6, the gate of the MOS tube Q6 is connected to the collector of the transistor Q5, and the on-off of the MOS tube Q6 is controlled by the single-chip microcomputer U6 through the on-off of the transistor Q5. In the normal state, the transistor Q5 is turned on, the gate of the MOS tube Q6 is at a low potential, and the MOS tube Q6 is also turned on. When it is needed to turn off the MOS tube Q6, the single-chip microcomputer U6 turns off the transistor Q5, so that the gate potential of the MOS tube Q6 rises, and the MOS tube Q6 is turned off.

[0107] The energy storage element is a battery pack BAT1. After the MOS tube Q6 is turned on, the battery pack BAT1 can be charged. When the battery pack BAT1 is discharged, the input is input into the voltage boosting module, and the voltage boosting module supplies power to the LED after being boosted.

[0108] Referring to Figure 8 In one embodiment, the output terminal of the fourth switch and the energy storage element are further coupled with a protection module, and the output terminal of the fourth switch is further coupled with an indication module for displaying information during charging.

[0109] In one embodiment, the display information can be at least one of sound and light signals. In one embodiment, the indication module includes a light-emitting diode. The indication module is not directly connected in parallel with the energy storage element, so that additional consumption of the energy storage element during discharging can be avoided. In one embodiment, the protection module includes at least one shunt resistor, a diode connected in series to prevent reverse current, and a fuse connected in series. In one embodiment, the indication module is coupled to the anode of the diode, and the cathode of the diode is coupled to the energy storage element.

[0110] Referring to Figure 9 In one embodiment, the protection module and the voltage boosting module are coupled to the energy storage element through a fifth switch.

[0111] In one embodiment, the fifth switch is installed on the lamp and serves as a charging and discharging switch of the energy storage element.

[0112] The fifth switch can directly control the charging and discharging of the energy storage element. For example, during transportation and storage before installation and use, the fifth switch can be turned off, the fifth switch is turned on during normal use, and the battery pack BAT1 is connected to the voltage boosting module through the fifth switch for emergency power supply.

[0113] Referring to Figure 16 The fourth switch is a MOS tube Q6, and the output terminal is connected to the indication module, i.e., the light-emitting diode LED1, through the resistor R47 in the protection module. The resistor R47 is further connected in parallel with the capacitor C24.

[0114] The output terminal of the fourth switch charges the battery pack BAT1 through the resistance R44 (the parallel resistance R45 and the resistance R46) of the protection module, the diode D12, the fuse F4 and the fifth switch.

[0115] The diode D12 is arranged between the indication module and the energy storage element, so that the indication module is prevented from being powered when the energy storage element is discharged, energy consumption is reduced, and the charging indication function is not affected.

[0116] In one embodiment, the switching module includes a second control element, the control terminal of the second control element is coupled to the output terminal of the fourth switch to detect the voltage, and the output terminal of the second control element is coupled to the voltage boosting module. In one embodiment, the input terminal of the voltage boosting module is coupled to the energy storage element, and the voltage boosting is achieved by using an inductor. In one embodiment, the voltage boosting module includes a third controller, the inductor is coupled to the third controller to provide the voltage boosting energy, and the output terminal of the second control element is coupled to the third controller to indicate the operation of the third controller.

[0117] Referring to Figure 16 and Figure 17 , the second control element is a triode Q7. When the power supply is on, the output terminal of the fourth switch, i.e. the MOS tube Q6, is connected to the base of the triode Q7 through the diode D13, the triode Q7 is cut off, and the control signal cannot be sent to the voltage boosting module. When the power supply is off, the triode Q7 is turned on, i.e. the control signal for voltage boosting power supply is sent to the voltage boosting module.

[0118] The third controller U5, for example, uses the MT7282 chip. The energy storage element is connected to the pin 5 of the third controller U5 through the inductor L2. The triode Q7 is connected to the pin 2 of the third controller U5 through the resistance R40. When the triode Q7 is turned on, the third controller U5 receives the signal and outputs the oscillation signal through the pin 5 to make the inductor L2 boost the voltage, and then the voltage is supplied to the LED through the diode D11, the resistance R42 (the parallel resistance R43) and the diode D10 in sequence.

[0119] The switching module circuit of the present application is simple and does not include a capacitor, so that the switching time of the emergency and normal lighting is shortened.

[0120] Referring to Figure 10 and Figures 19 to 22 , in one embodiment, the control module includes a single-chip microcomputer, and the power supply terminal of the single-chip microcomputer is coupled to the output terminal of the constant voltage module and the energy storage element.

[0121] In one embodiment, the control module further includes a voltage stabilizing unit, the output terminal of the constant voltage module and the energy storage element are coupled to the input terminal of the voltage stabilizing unit, and the output terminal of the voltage stabilizing unit is coupled to the power supply terminal of the single-chip microcomputer.

[0122] The constant voltage module and the energy storage element can supply power to the control module at the same time, the power supply end of the single-chip microcomputer U6 is pin 1, and the output end of the voltage stabilizing unit U7 is connected to pin 1.

[0123] The output end of the constant voltage module is connected to the input end of the voltage stabilizing unit U7 through a diode D15 and a resistor R54 in sequence, and the energy storage element is connected to the input end of the voltage stabilizing unit U7 through a diode D14 and a resistor R54 in sequence, so that double power supply can be realized, and the single-chip microcomputer can work normally in various required states.

[0124] The energy storage element and the commercial power supply supply power at the same time when both of them have electricity, and the commercial power supply supplies power when the energy storage element has no electricity, so that the single-chip microcomputer can work normally when the commercial power supply is restored after the energy storage element is discharged in an emergency state.

[0125] The output end of the voltage stabilizing unit U7 is further connected to the ground through a capacitor C21, and the input end of the voltage stabilizing unit U7 is further connected to the ground through a capacitor C20.

[0126] In order to collect corresponding signals, in one embodiment, the output end of the constant voltage module is further coupled to the first signal input end of the single-chip microcomputer, for the control module to detect the commercial power signal.

[0127] The first signal input end is pin 6 of the single-chip microcomputer U6, the output end of the constant voltage module is connected to pin 6 through a resistor R56, pin 6 detects the commercial power signal, and the single-chip microcomputer U6 sends a corresponding signal to the fourth switch when power failure occurs. Pin 6 is further connected to the ground through a resistor R55 and a capacitor C25, respectively.

[0128] In one embodiment, the single-chip microcomputer is coupled to the control end of the fourth switch through the first signal output end. The first signal output end is pin 2 of the single-chip microcomputer U6. In one embodiment, the energy storage element is further coupled to the second signal input end of the single-chip microcomputer, for the control module to detect the voltage of the energy storage element. The second signal input end is pin 7 of the single-chip microcomputer U6, which can reflect the voltage of the energy storage element, and can implement charge and discharge management when the voltage is too high or too low.

[0129] In one embodiment, the two sides of the fifth switch are coupled to the second signal input end and the third signal input end of the single-chip microcomputer, respectively, for the control module to detect and compare the voltages on the two sides of the fifth switch. One end of the fifth switch connected to the energy storage element is connected to pin 7 of the single-chip microcomputer U6 through a resistor R57, and pin 7 is further connected to the ground through a resistor R58 and a capacitor C23, respectively. The other end of the fifth switch is connected to the third signal input end, i.e. pin 5 of the single-chip microcomputer U6, through a resistor R52, and pin 5 is further connected to the ground through a resistor R53 and a capacitor C22, respectively. If the input signals of the second signal input end and the third signal input end are the same, the fifth switch can be considered to be turned on, and if the voltages of the second signal input end and the third signal input end are different, it means that the fifth switch is turned off. In order to control the second optocoupler, in one embodiment, the single-chip microcomputer is coupled to the second optocoupler through the second signal output end. The second signal output end is pin 3 of the single-chip microcomputer U6.

[0130] The control module is composed of a single-chip microcomputer and peripheral circuits connected with each pin of the single-chip microcomputer, and the peripheral circuits are mainly used for signal and energy processing to meet the needs of the single-chip microcomputer, so that the power supply end, signal input end and signal output end of the control module are equivalent to the power supply end, signal input end and signal output end of the single-chip microcomputer.

[0131] Referring to Figures 19 to 22 In an embodiment of the present application, an LED straight tube lamp is provided, which comprises a lamp tube, an LED light bar 4 and a driving circuit installed in the lamp tube, the lamp tube comprises a tube body 1 and end covers 2 and 3 fixed at both ends of the tube body 1, and two pins are fixed on each end cover, for example, two pins 21 on the end cover 2 and two pins 31 in the end cover 3, which respectively constitute two power connection ends.

[0132] In combination with the foregoing embodiments, the driving circuit comprises a signal branch, a commercial power branch and an emergency branch with an energy storage module, the energy storage module supplies power to the LED when power is off, and an external power supply supplies power to the LED through the commercial power branch when power is on; the signal branch is coupled with the pins at one end of the lamp tube for transmitting a driving signal to control the on-off of the commercial power branch, and the commercial power branch is coupled with the pins at the other end of the lamp tube for transmitting power to supply power to the LED light bar.

[0133] In one embodiment, the control module is further coupled with a third switch 53 for indicating the control module to turn off the commercial power branch to supply power to the LED light bar 4 and turn on the emergency branch to supply power to the LED light bar 4, a first circuit board is arranged in the lamp tube, the third switch 53 is fixed on the first circuit board, and the lamp tube is provided with a relief opening, and a control knob of the third switch 53 is exposed to the relief opening.

[0134] In one embodiment, the emergency branch comprises an energy storage element, the energy storage element is coupled with a fifth switch 51 for controlling the on-off of charging and discharging, a second circuit board is arranged in the lamp tube, the fifth switch 51 is fixed on the second circuit board, and the lamp tube is provided with a relief opening, and a control knob of the fifth switch 51 is exposed to the relief opening.

[0135] In one embodiment, an indicator lamp 52 is arranged in the emergency branch and coupled with the energy storage element to display information when charging, a third circuit board is arranged in the lamp tube, the indicator lamp 52 is fixed on the third circuit board, and the lamp tube is provided with a relief opening or a transparent area, and the indicator lamp 52 is exposed to the relief opening or corresponds to the transparent area.

[0136] In one embodiment, the relief openings are integrally connected or arranged in multiple.

[0137] In one embodiment, all the circuit boards are integrated into an integral structure, i.e., the circuit board 5.

[0138] Referring to Figure 23In an embodiment of the present application, an LED lamp is also provided, which comprises a lamp tube, an LED light bar 4 and a driving circuit installed in the lamp tube. The driving circuit can be of conventional technology, and is more preferably of the driving circuit of any of the aforementioned embodiments.

[0139] The lamp tube comprises a tube body 1 and end caps 2 and 3 fixed at two ends of the tube body, and two pins are fixed on each end cap, such as two pins 21 on the end cap 2 and two pins 31 on the end cap 3.

[0140] In one of the embodiments, the tube body 1 comprises a bottom shell 11 and a light-transmitting cover 12 which are radially buckled to each other. The bottom shell 11 is provided with first clamping grooves 111 on the outer walls of two opposite sides in the radial direction and with second clamping grooves 112 on the inner walls of two opposite sides in the radial direction. The light-transmitting cover 12 is provided with clamping tongues 132 on the inner walls which are matched with the first clamping grooves 111. The LED light bar 4 comprises a substrate and LEDs fixed on the substrate, and the substrate is clamped and fixed in the second clamping grooves 112. The lamp tube 1 is provided with a switch and / or an indicator light which are coupled with the driving circuit. The inner walls of the light-transmitting cover 12 are provided with positioning grooves 131, and circuit boards 5 are fixed in the positioning grooves 131. The switch and / or the indicator light are fixed on the circuit boards 5. The light-transmitting cover 12 is further provided with avoiding openings, and the switch and / or the indicator light are exposed to the avoiding openings.

[0141] For example, the switch and the indicator light in the aforementioned embodiments specifically comprise a third switch 53, a fifth switch 51 and an indicator light 52. The avoiding openings are arranged in three intervals, and correspond to and expose the third switch 53, the fifth switch 51 and the indicator light 52, respectively.

[0142] In one of the embodiments, the substrate and the bottom shell 11 form an installation chamber 113, and the driving circuit is fixed in the installation chamber 113 in the form of a circuit board. In one of the embodiments, the bottom shell 11 and the light-transmitting cover 12 are each in the form of a semi-cylindrical shape. In one of the embodiments, the bottom shell 11 is in the form of a profile. The outer part of the bottom shell 11 can be provided with heat dissipation ribs 114. In one of the embodiments, the two edges of the bottom shell 11 in the circumferential direction are inwardly turned to form bent portions, the first clamping grooves 111 are formed on the outer side of the bent portions, and the second clamping grooves 112 are formed on the inner side of the bent portions. In one of the embodiments, the light-transmitting cover 12 is in a multi-segment structure which is spliced together in the length direction. One segment at the end is used as an installation segment 13, and the positioning grooves 131 are formed on the inner walls of the installation segment. In one of the embodiments, the positioning grooves 131 are arranged in two opposite positions, and the two opposite sides of the circuit board 5 are inserted into the corresponding positioning grooves 131. In one of the embodiments, the inner walls of the installation segment 13 are arranged in pairs with protrusions, and the gap between the same pair of protrusions is used as one of the positioning grooves 131. In one of the embodiments, the end cap 2 and the end cap 3 are respectively sleeved and fixed at the two ends of the tube body 1.

[0143] In combination with the aforementioned embodiments and the accompanying drawings, the working process of the LED emergency lamp of the present application is specifically described. After the LED emergency lamp is installed, the fifth switch is closed.

[0144] In the initial state, the first switch coupled to the first end is off, i.e. the first end has no AC input (120V-277V), and the second switch is a normally closed switch, so the second end has AC input (120V-277V).

[0145] The first optocoupler switch is off, and the working precondition of the constant current module (MT7933) is not met, i.e. the MOS tube Q4 is turned on to ground the base of the transistor Q3, so that the transistor Q3 is turned off, the power supply pin 5 of the first controller U2 is not powered, the first controller U2 does not work, and the external power supply cannot supply power to the LED via the AC branch, so the LED cannot be normally lit.

[0146] Since the second end has AC input, the constant voltage module (MT7990) and the single-chip microcomputer of the control module are working. After the single-chip microcomputer works, the MOS tube Q6 as the fourth switch is turned on, so that the base of the transistor Q7 is at a high potential and the transistor Q7 is not turned on, and then the third controller U5 (MT7282) of the boost module does not work, and the inductor L2 cannot boost power supply to the LED, i.e. the emergency branch also cannot supply power to the LED.

[0147] Since the MOS tube Q6 is turned on, the battery pack BAT1 can be normally charged, and the light-emitting diode LED1 indicator light is lit.

[0148] When the user needs to turn on the light to use the lighting function, the first switch is closed, at this time the first end is powered, the first optocoupler switch is turned on, and the corresponding constant current module working precondition is met, i.e. the gate of the MOS tube Q4 is at a low potential and is turned off, the transistor Q3 is turned on to supply power to the power supply pin 5 of the first controller U2, at this time the AC branch is turned on to light the LED.

[0149] Similarly, the emergency branch also cannot supply power to the LED, the battery pack BAT1 can be normally charged, and the light-emitting diode LED1 indicator light is lit.

[0150] If the second switch is turned off (the emergency branch can be detected), the second end loses power, the second rectifier filter unit cannot output power, the constant voltage module and the constant current module do not work, of course the battery pack BAT1 is not charged, and the light-emitting diode LED1 is not lit.

[0151] Since the single-chip microcomputer U6 of the control module is powered by the battery pack BAT1 and still works normally, the single-chip microcomputer U6 cannot detect the AC signal at the output end of the constant voltage module, so the MOS tube Q6 is turned off, the transistor Q7 as the second control element is turned on, then the third controller U5 of the boost module works, the inductor L2 boosts power supply to the LED, i.e. the emergency branch supplies power to the LED.

[0152] This state because the second switch is off, also similar to the power outage, because the constant current module does not work, the first optocoupler is off or closed meaningless, the corresponding first switch does not work.

[0153] If the third switch is on (emergency branch can be detected), the single-chip microcomputer U6 obtains the instruction and makes the second optocoupler conduct, the transistor Q3 is off, that is, the power supply pin 5 of the first controller U2 cannot be supplied with power, resulting in that the constant current module does not work, the power supply branch cannot supply power to the LED, and the LED cannot be normally lit.

[0154] At the same time, the single-chip microcomputer U6 also makes the MOS tube Q6 off, the battery pack BAT1 is not charged, and the light-emitting diode LED1 is not bright. The MOS tube Q6 off makes the transistor Q7 of the switching module conduct, and then the third controller U5 of the boost module works, the inductor L2 boosts the power supply to the LED, that is, the emergency branch supplies power to the LED.

[0155] This state because the constant current module does not work, the first optocoupler is off or closed meaningless, the corresponding first switch does not work.

[0156] The second switch is arranged in the AC circuit outside the lamp tube, and the third switch is directly arranged on the lamp tube, realizing the double emergency detection function. The third switch can make the installation detection convenient, and the second switch can make the installation detection convenient.

[0157] When the power supply is off, the first end and the second end have no power supply, the constant voltage module and the constant current module do not work, the power supply branch cannot supply power to the LED, and the LED cannot be normally lit. At the same time, the MOS tube Q6 is off, the battery pack BAT1 is not charged, and the light-emitting diode LED1 is not bright. The transistor Q7 is conductive, and then the third controller U5 of the boost module works, the inductor L2 boosts the power supply to the LED, that is, the emergency branch supplies power to the LED.

[0158] In order to protect the battery pack from over-discharge, the single-chip microcomputer U6 detects the emergency branch power supply time. When the time is greater than 90 minutes (related to the capacity of the battery pack BAT1, which can actually be adjusted as needed), the battery pack BAT1 voltage drops to the early warning value, and then the power supply is stopped through the single-chip microcomputer U6 or the charge-discharge management module of the battery pack BAT1 itself, the LED is extinguished, and the single-chip microcomputer U6 and the charge-discharge management module can also communicate with each other.

[0159] Because the voltage of the battery pack BAT1 is low, the single-chip microcomputer also stops working and enters the sleep energy-saving state.

[0160] When the power supply is restored, the first end and the second end have the power supply, the constant voltage module, the constant current module (according to the state of the first switch) and the single-chip microcomputer can work normally.

[0161] In one embodiment, the single-chip microcomputer periodically charges and discharges the energy storage element in the energy storage module, thereby facilitating maintenance of the performance of the energy storage element.

[0162] In one embodiment, the single-chip microcomputer sleeps when no mains signal is received. The absence of a mains signal can be due to a power outage or disconnection of the second switch, i.e. the constant voltage module is not outputting. Disconnection of the fifth switch is generally during transportation or storage, and the energy storage element has not yet entered the working state. The single-chip microcomputer enters a sleep mode and is in a low-power state. Until the sleep condition is removed, for example, the second terminal is powered on, the single-chip microcomputer is awakened.

[0163] In one embodiment, the single-chip microcomputer closes the fourth switch and opens the constant current module when the fifth switch is open.

[0164] In one embodiment, the single-chip microcomputer periodically charges and discharges the energy storage element in the energy storage module after the LED emergency light has been used for a predetermined period of time (e.g. 30 days), and interrupts the timing during the sleep period. The single-chip microcomputer starts timing after the first power-on use, but interrupts the timing during the sleep period. After being awakened, it continues to enter the timing state, and the timing time is cumulative.

[0165] One embodiment of the present application also provides a control method for an LED emergency light, wherein the LED emergency light is the LED emergency light of the above-mentioned related embodiments, and the control method comprises periodically charging and discharging the energy storage element in the energy storage module by the control module.

[0166] In one embodiment, during discharging, the mains branch is first turned off, and then the emergency branch is driven to supply power to the LED.

[0167] In one embodiment, the manner of turning off the mains branch is to send a signal to the constant current module through the second optocoupler to turn off the constant current module. After the control module turns on the second optocoupler, the base of the triode Q3 is grounded and thus turned off, the first controller U2 stops working, and the mains branch no longer supplies power to the LED.

[0168] In one embodiment, the manner of driving the emergency branch to supply power to the LED is to turn off the fourth switch, and the switching module enables the boost module to supply power to the LED.

[0169] The discharging degree can control the end point according to time and / or the voltage of the energy storage element, for example, in one embodiment, the driving emergency branch for supplying power to the LED is turned off after the discharging is scheduled for a certain time. In one embodiment, the driving emergency branch for supplying power to the LED is turned off when the voltage of the energy storage element is lower than a threshold. In one embodiment, the driving emergency branch for supplying power to the LED is turned off by turning on the fourth switch. In one embodiment, during the charging, the driving emergency branch for supplying power to the LED is turned off first, and then the mains branch is turned on. In one embodiment, the mains branch is turned on by turning off the second optocoupler. After the control module turns off the second optocoupler, the control right is released, and then whether the transistor Q3 is turned on or not is controlled by the state of the first switch, and whether the mains branch supplies power to the LED is controlled by the first switch.

[0170] The control sequence during discharging and charging is also to avoid common.

[0171] Referring to ​ , the control logic of the control module in the LED is shown in the figure.

[0172] In the figure, the total single-chip microcomputer of the control module is the main body of action, and the opening and closing of the constant current module means sending a signal to the constant current module through the second optocoupler to release or obtain the control right of turning off the constant current module. When the constant current module is turned on, the single-chip microcomputer pin 3 is set to low level, and when the constant current module is turned off, the single-chip microcomputer pin 3 is set to high level.

[0173] Turning on and off the fourth switch means charging or not charging the battery pack, and also means that the battery pack does not supply power or supplies power to the LED through the emergency branch. When the fourth switch is turned on, the single-chip microcomputer pin 2 is set to high level, and when the fourth switch is turned off, the single-chip microcomputer pin 2 is set to low level.

[0174] In which the detection of the mains signal is judged by whether the single-chip microcomputer pin 6 is high level, whether the third switch is closed is judged by the pin 4, whether the fifth switch is closed is judged by comparing the voltage of the pin 5 and the pin 7, and whether the voltage of the battery pack is higher than the threshold is judged by the voltage of the pin 7. During the discharging of the battery pack, i.e. the process of supplying power to the LED through the emergency branch, the single-chip microcomputer is in a low voltage detection state, and the voltage of the battery pack is detected at any time to avoid over-discharging and protect the battery.

[0175] In combination with the above-mentioned related embodiments, one embodiment of the present application provides a control method of an LED emergency lamp, comprising: S100, detecting the mains signal after starting; S200, if the mains signal is detected, detecting whether the fifth switch is closed; S300, if the fifth switch is detected to be closed, detecting whether the third switch is closed; S400, if the third switch is not closed (meaning that the LED can work normally), sending a turn-on signal to the fourth switch; S500, after a delay (for example, 50 ms), sending a release control right signal to the constant current module. At this time, the LED emergency lamp can control the on-off by using the first switch.

[0176] Wherein the release of the off control signal is sent to the constant current module, i.e. the second optocoupler is closed.

[0177] In one embodiment, when the fifth switch is closed, the constant current module is turned off, and the fourth switch is disconnected after a delay. In one embodiment, when the third switch is closed, the constant current module is turned off, and the fourth switch is disconnected after a delay. In one embodiment, when the third switch is closed for more than a threshold time (e.g. five seconds), the low power detection state is entered.

[0178] In this embodiment, the active discharge detection function is configured. When the single-chip microcomputer detects that the third switch is closed for more than a threshold time (e.g. five seconds), the energy storage element discharges. When discharging, the constant current module is first turned off, and the fourth switch is disconnected after a delay. That is, the emergency branch supplies power to the LED to discharge the energy storage element, and the time is reset at the same time.

[0179] In one embodiment, the control method of the LED emergency lamp further includes recording the normal use time of the LED emergency lamp, and discharging the energy storage element in the energy storage module when the use time reaches a threshold value (e.g. 30 days). When discharging, the constant current module is first turned off, and the fourth switch is disconnected after a delay. That is, the emergency branch supplies power to the LED to discharge the energy storage element. During the discharging process, the voltage of the energy storage element is detected in real time. When the voltage of the energy storage element is low to an expected value, the fourth switch is turned on (i.e. charging is performed and the emergency branch no longer supplies power to the LED). After a delay, the release of the off control signal is sent to the constant current module (i.e. the second optocoupler is closed).

[0180] The LED emergency lamp of the present application can be normally turned on and off, has the function of a conventional lighting tube, and can also be used as an emergency lamp when there is no commercial power, i.e. it is used for both commercial lighting and emergency lighting. When removed from the lamp holder, it can also be used as a mobile emergency lighting.

Claims

1. An LED straight tube light with a switch and / or indicator light, comprising a tube, an LED light strip and a driving circuit installed inside the tube, the tube comprising a tube body and end caps fixed at both ends of the tube body, each end cap having two pins fixed thereon; characterized in that, The tube body includes a bottom shell and a light-transmitting cover that are interlocked radially, and the LED light strip is fixed to the bottom shell; the light-transmitting cover has a clearance opening, and the switch and / or indicator light are exposed in the clearance opening; The driving circuit includes a signal branch, a mains power branch, and an emergency branch with a charging circuit and an energy storage module. The signal branch is coupled to one end of the lamp tube and is used to transmit driving signals to control the on / off state of the mains power branch. The mains power branch and the charging circuit are coupled to the other end of the lamp tube and are used to transmit power to supply power to the LED light strip and charge the energy storage module, respectively. The signal branch includes a first rectifier filter unit and a first optocoupler coupled in sequence. The mains power branch includes a second rectifier filter module and a constant current module coupled in sequence. The constant current module includes components coupled to the second rectifier filter unit. The module includes a freewheeling unit, a switching element, and a first controller that controls the switching element to be turned on or off. A first control element is coupled between the power supply terminal of the second rectifier and filter module and the first controller. The mains power branch can only supply power to the LED when both ends of the lamp tube are energized. When the first control element is disconnected because it does not receive the external drive signal, the second rectifier and filter module cannot supply power to the first controller, and the constant current module cannot work normally. Conversely, when the first control element receives the external drive signal and is turned on, the constant current module works normally. When the LED tube light is powered on, the external power supply supplies power to the LED strip through the mains power branch and charges the energy storage module through the charging circuit. When the power is off, the energy storage module supplies power to the LED strip.

2. The LED straight tube light with switch and / or indicator light according to claim 1, characterized in that, The inner wall of the light-transmitting cover is provided with a positioning groove, and a circuit board is fixed in the positioning groove. The switch and / or indicator light are fixed on the circuit board.

3. The LED straight tube light with switch and / or indicator light according to claim 2, characterized in that, The positioning grooves are two oppositely arranged grooves extending along the length of the lamp tube, and the two opposite sides of the circuit board are inserted into the corresponding positioning grooves.

4. The LED straight tube light with switch and / or indicator light according to claim 1, characterized in that, The bottom shell has a first slot on the outer wall on two opposite radial sides, and the inner wall of the light-transmitting cover has a latch that cooperates with the first slot. The bottom shell has a second slot on the inner wall on two opposite radial sides. The LED light strip includes a substrate and LEDs fixed on the substrate. The substrate is snapped and fixed in the second slot.

5. The LED straight tube light with switch and / or indicator light according to claim 4, characterized in that, The bottom shell has two edges that fold inwards to form a bend, the first slot is formed on the outside of the bend, and the second slot is formed on the inside of the bend.

6. The LED straight tube light with switch and / or indicator light according to claim 4, characterized in that, The space between the substrate and the bottom shell is a mounting chamber, and the drive circuit is fixed in the mounting chamber by means of a circuit board.

7. The LED straight tube light with switch and / or indicator light according to claim 1, characterized in that, The light-transmitting cover is a multi-segment structure that is spliced ​​together along its length, with one segment at the end serving as the mounting segment, and the clearance opening is located on the mounting segment.

8. The LED straight tube light with switch and / or indicator light according to claim 1, characterized in that, The output terminal of the charging circuit is coupled to a charging indicator module with an indicator light, which is exposed in the clearance opening.

9. The LED straight tube light with switch and / or indicator light according to claim 1, characterized in that, The energy storage module has a fifth switch for controlling charging and discharging, and the fifth switch is exposed in the clearance port.

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