CN112333878A

Movatterモバイル変換

Info

Publication number: CN112333878A
Application number: CN202011266515.8A
Authority: CN
Inventors: 陈广炎; 邹伟宏; 卢昌淼; 钟智祥
Original assignee: Huizhou Cdn Industrial Development Co ltd
Current assignee: Huizhou Cdn Industrial Development Co ltd
Priority date: 2020-11-13
Filing date: 2020-11-13
Publication date: 2021-02-05
Anticipated expiration: 2040-11-13
Also published as: CN112333878B

Abstract

Translated fromChinese

本申请涉及LED驱动器、LED灯具及校验系统，在LED驱动器和LED灯具之间设置有第一校验电路、第二校验电路，第一校验电路的第一控制单元通过第一解调电路向第二校验电路发送地址码，第二校验电路的第二解码电路接收地址码回传到第二控制单元进行识别，第二控制单元识别通过后通知第二开关电路导通，同时通过第一解码电路向第一解调电路输出确认码且控制第一开关电路持续导通，完成LED灯具与LED驱动器的电性校验。从而实现有效对LED灯具产品进行防伪，同时，避免消费者使用假冒伪劣产品而产生安全隐患。

The present application relates to an LED driver, an LED lamp and a verification system. A first verification circuit and a second verification circuit are arranged between the LED driver and the LED lamp, and the first control unit of the first verification circuit passes the first demodulation. The circuit sends the address code to the second verification circuit, and the second decoding circuit of the second verification circuit receives the address code and sends it back to the second control unit for identification. The first decoding circuit outputs a confirmation code to the first demodulation circuit and controls the first switch circuit to continue to conduct, so as to complete the electrical verification of the LED lamp and the LED driver. In this way, the anti-counterfeiting of LED lighting products can be effectively implemented, and at the same time, consumers can avoid potential safety hazards caused by the use of counterfeit and shoddy products.

Description

LED driver, LED lamp and verification system

Technical Field

The present application relates to the field of LED technology, and more particularly, to an LED driver, an LED lamp, and a calibration system.

Background

With the rapid development and iteration of LED lighting, consumer interest in lighting products has shifted from low prices to high quality. In order to protect and purify the market environment and provide better product service for consumers. Therefore, product anti-counterfeiting becomes an essential means for protecting regular manufacturers and consumers. Regarding the anti-counterfeiting measures of products, enterprises generally adopt means such as anti-counterfeiting identification or two-dimensional codes on the product body stickers (laser engraving) and laser anti-counterfeiting printing of outer packages for anti-counterfeiting identification. The anti-counterfeiting method can not completely eradicate counterfeit products, so that potential safety hazards are caused by using the counterfeit products.

Disclosure of Invention

The application is for overcoming the problem that uses counterfeit and shoddy product to produce the potential safety hazard, and the technical problem that this application will solve provides LED driver, LED lamps and lanterns and check-up system.

The LED driver is arranged in the LED driver and comprises a first checking circuit and a first switch circuit,

the driving output end of the LED driver is connected with the driving input end of the LED lamp, and the first calibration circuit and the first switch circuit are connected to the driving output end;

the first checking circuit controls the on-off of the first switch circuit by sending an address code to the LED lamp and receiving a confirmation code from the LED lamp.

Optionally, the first check 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 further connected with 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 so as to control the on-off of the first switch circuit.

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.

Optionally, the first modulation circuit comprises a trigger circuit and a voltage regulation output circuit,

the voltage regulating output circuit is connected between the driving output end and a power ground; the input end of the trigger circuit is connected with the first control unit, and the control end of the trigger circuit is connected with the voltage regulating output circuit;

the trigger circuit outputs an address code through the voltage regulation output circuit by receiving a level signal of the first control unit.

Optionally, the trigger circuit includes a first triode, a base of the first triode is connected to the first control unit through a first resistor, a collector of the first triode is connected to the voltage regulation output circuit, and an emitter of the first triode is grounded.

Optionally, the voltage regulation output circuit comprises a first MOS transistor, a second resistor, and a third resistor,

the grid electrode of the first MOS tube is respectively connected with the trigger circuit, the drain electrode is connected with the driving output end through a second resistor, and the source electrode is grounded; and the grid electrode of the first MOS tube is also connected with the driving output end through a third resistor.

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

the energy storage circuit and the voltage regulation input circuit are both connected between the driving output end and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the first control unit;

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

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;

one end of the first diode is connected with the driving output end, the other end of the first diode is connected with the second diode, the other end of the second diode is respectively connected with 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 with the base electrode of the second triode; an emitting electrode of the second triode is connected with the driving output end, a collector electrode of the second triode is respectively connected with the first control unit and the seventh resistor through a sixth resistor, and the seventh resistor is grounded.

Optionally, the first verification circuit further comprises a first power supply chip,

the power supply input end of the first power supply chip is connected with the LED driver, and the power supply output end of the first power supply chip is connected with the first control unit; and the power input end and the power output end of the first power supply chip are also connected with filter capacitors.

Optionally, the first switch circuit includes a third transistor and a second MOS transistor,

the base electrode of the third triode is connected with the first checking circuit, the collector electrode of the third triode is connected with the grid electrode of the second MOS tube, and the emitter electrode of the third triode is grounded; and the drain electrode of the second MOS tube is connected with the drive output end, and the source electrode of the second MOS tube is connected with the drive input end.

In addition, the application also provides an LED lamp which is arranged in the LED lamp and comprises a second checking circuit and a second switch circuit,

the driving input end of the LED lamp is connected with the driving output end of the LED driver, and the second calibration circuit and the second switch circuit are connected to the driving input end;

the second check circuit controls the on-off of the second switch circuit and sends a confirmation code to the LED driver by receiving an address code from the LED driver.

Optionally, the second check 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 further connected with the second switch circuit, receives the address code of the LED driver through a second demodulation circuit, and outputs a confirmation code to the LED driver through a first modulation circuit so as to control the on-off of the first switch circuit.

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 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.

Optionally, the second modulation circuit comprises a trigger circuit and a voltage regulation output circuit,

the voltage regulating output circuit is connected between the driving input end and a power ground; the input end of the trigger circuit is connected with the second control unit, and the control end of the trigger circuit is connected with the voltage regulating output circuit;

the trigger circuit outputs the confirmation code through the voltage regulation output circuit by receiving the level signal of the second control unit.

the grid electrode of the first MOS tube is respectively connected with the trigger circuit, the drain electrode is connected with the driving input end through a second resistor, and the source electrode is grounded; and the grid electrode of the first MOS tube is also connected with the driving input end through a third resistor.

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

the energy storage circuit and the voltage regulation input circuit are both connected between the driving input end and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the second control unit;

the energy storage circuit receives the voltage change of the driving input end, so that the voltage regulating input circuit outputs an address code to the second control unit.

one end of the first diode is connected with the driving input end, the other end of the first diode is connected with the second diode, the other end of the second diode is respectively connected with 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 with the base electrode of the second triode; an emitting electrode of the second triode is connected with the driving input end, a collector electrode of the second triode is respectively connected with the first control unit and the seventh resistor through a sixth resistor, and the seventh resistor is grounded.

Optionally, the second verification circuit further comprises a second power supply chip,

the power supply input end of the second power supply chip is connected with the LED driver, and the power supply output end of the second power supply chip is connected with the second control unit; and the power input end and the power output end of the second power supply chip are also connected with filter capacitors.

Optionally, the second switching circuit includes a third transistor and a second MOS transistor,

the base electrode of the third triode is connected with the second check circuit, the collector electrode of the third triode is connected with the grid electrode of the second MOS tube, and the emitter electrode of the third triode is grounded; and the drain electrode of the second MOS tube is connected with the drive output end, and the source electrode of the second MOS tube is connected with the drive input end.

In addition, the application also discloses a checking system, which comprises the LED driver and the LED lamp,

the driving output end of the LED driver is connected with the driving input end of the LED lamp, the second check circuit controls the on-off of the second switch circuit and outputs a confirmation code to the first check circuit by receiving the address code of the first check circuit; and the first checking circuit controls the on-off of the first switch circuit by receiving the confirmation code.

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

(1) this application sets up the LED driver in the LED driver, checks the circuit through first and sends the address code and receive the affirmation sign indicating number of LED lamps and lanterns to LED lamps and lanterns, switches on first switch circuit, realizes preventing falsification to the LED lamps and lanterns of connecting.

(2) The LED lamp is arranged in the LED lamp, the address code of the LED driver is received through the second check circuit, the confirmation code is sent to the LED driver, the second switch circuit is conducted, and the connected LED driver is prevented from being faked.

(3) This application is provided with first check-up circuit between LED driver and LED lamps and lanterns, the second check-up circuit, the first control unit of first check-up circuit sends the address code to the second check-up circuit through first demodulation circuit, the second decoding circuit of second check-up circuit receives the address code and passes back to the second control unit and discerns, the second control unit discernment informs the second switch circuit after passing through and switches on, confirm the sign indicating number and control first switch circuit and continuously switch on to first demodulation circuit output through first decoding circuit simultaneously, accomplish the electrical property check-up of LED lamps and lanterns and LED driver. Therefore, the LED lamp product is effectively prevented from being faked, and potential safety hazards caused by fake and inferior products used by consumers are avoided.

Drawings

Fig. 1 is a circuit diagram of a first verifying circuit and a first switch circuit according to an embodiment of the present application.

Fig. 2 is a circuit diagram of a second verifying circuit and a second switch circuit according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a main control chip of a first control unit according to an embodiment of the present application.

Fig. 4 is a schematic diagram of a first power chip of a first verification circuit according to an embodiment of the present disclosure.

FIG. 5 is a schematic diagram of a burning circuit of a first verification circuit according to an embodiment of the present disclosure.

Fig. 6 is a schematic structural diagram of a verification system according to an embodiment of the present application.

Fig. 7 is an interaction timing diagram of an LED driver and an LED lamp according to an embodiment of the present application.

Detailed Description

The present application will be further described with reference to the following detailed description.

The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", and the like, if any, are used in the orientations and positional relationships indicated in the drawings only for the convenience of describing the present application and for simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore the terms describing the positional relationships in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.

Furthermore, if the terms "first," "second," and the like are used for descriptive purposes only, they are used for mainly distinguishing different devices, elements or components (the specific types and configurations may be the same or different), and they are not used for indicating or implying relative importance or quantity among the devices, elements or components, but are not to be construed as indicating or implying relative importance.

In the embodiments as shown in fig. 1, 3, 4, and 5, the present application provides an LED driver, which includes afirst verification circuit 100 and afirst 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, and thefirst verification circuit 100 and thefirst switch circuit 300 are connected to the driving output terminal P1; thefirst calibration circuit 100 controls the on/off of thefirst 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 an LED constant current driving power output terminal of the LED driver, and the driving input terminal P2 is an LED constant current driving power input terminal of the LED lamp, and is configured to provide a working power supply for the LED lamp. Thefirst verification circuit 100 and thefirst switch circuit 300 are connected to the driving output terminal P1, and since the driving output terminal P1 is connected to the driving input, thefirst verification circuit 100 can send or receive signals to or from the LED lamp. A second check circuit for identifying the address code and feeding back the confirmation code can be arranged in the LED lamp; the LED driver of the application carries out interactive communication with the LED lamp through thefirst checking circuit 100. The LED driver is arranged in the LED driver, the address code is sent to the LED lamp through thefirst checking circuit 100, the confirmation code of the LED lamp is received, thefirst switch circuit 300 is conducted, and the connected LED lamp is prevented from being faked.

In some embodiments, the first check circuit 100100 includes a first control unit, and a first modulation circuit 110 and afirst demodulation circuit 120 connected to the first control unit; the first control unit is further connected to thefirst switch circuit 300, 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 thefirst demodulation circuit 120, so as to control the on/off of thefirst switch circuit 300. 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 an acknowledgement code from the second calibration circuit through thefirst demodulation circuit 120, the first control unit identifies the acknowledgement code, and if the acknowledgement code corresponds to the preset code, the first control unit controls thefirst switch circuit 300 to be continuously turned on; if the confirmation code is empty, thefirst switch circuit 300 is turned off after a certain time.

In an implementation manner of the foregoing embodiment, the first control unit is specifically a main control chip U1, the main control chip U1 is provided with a transmitting terminal TX, a receiving terminal RX, and a switch terminal SW, the transmitting terminal TX is connected to the first modulation circuit 110, the receiving terminal RX is connected to thefirst demodulation circuit 120, and the switch terminal SW is connected to thefirst switch circuit 300. In this embodiment, the main control chip U1 may be any series of chips of SN65HVD7x series/PIC 16(L) F18xx series; the main control chip U1 is provided with a code sending and matching program; the burning circuit for burning the main control chip U1 comprises a burning connector, a power supply end of the burning connector is connected with a second input power VCC2, and a burning output end of the burning connector is connected with a burning end ICE CLK, a burning end ICE DAT and a burning end ICE RST of the main control chip U1. The main control chip U1 is an anti-counterfeit identification circuit core device, and is provided with firmware connected with the first modulation circuit 110, thefirst demodulation circuit 120, and thefirst switch circuit 300, and a burning connector is reserved for facilitating production and debugging. The first modulation circuit 110 and thefirst demodulation circuit 120 perform code matching through the TX and RX address codes of the transmitting terminal and recognize and execute the bus on-off, that is, thefirst switch circuit 300 turns on or off the switch terminal SW.

In one implementation of the above embodiment, the first modulation circuit 110 includes a trigger circuit, a voltage regulation output circuit, and the voltage regulation output circuit is connected between the driving output terminal P1 and the power ground; the input end of the trigger circuit is connected with the first control unit, and the control end of the trigger circuit is connected with the voltage regulating output circuit; the trigger circuit outputs the address code through the voltage regulation output circuit by receiving the level signal of the first control unit. In the embodiment, the trigger circuit receives the 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 an address code.

Specifically, the trigger circuit comprises a first triode Q1, the base of the first triode Q1 is connected with the first control unit through a first resistor R1, the collector of the first triode Q1 is connected with the voltage regulation output circuit, and the emitter of the first triode Q is grounded. The trigger circuit receives a level signal of the first control unit through the base electrode of the first triode Q1 so as to control the voltage regulation output circuit;

specifically, the voltage regulation output circuit comprises a first MOS transistor Q4, a second resistor R2 and a third resistor R3, the grid electrode of the first MOS transistor Q4 is respectively connected with the trigger circuit, the drain electrode is connected with the driving output end P1 through the second resistor R2, and the source electrode is grounded; the gate of the first MOS transistor Q4 is also connected to the driving output terminal P1 through a third resistor R3. The gate of the first MOS transistor Q4 controls the on/off of the first MOS transistor Q4 by receiving a signal of the trigger circuit, thereby changing the voltage of the first driving output terminal P1.

In the first modulation circuit 110, the first resistor R1 is a current-limiting resistor, and the first transistor Q1 is an MMBT4401 transistor, which functions as a reverse voltage; the third resistor R3 provides a base voltage for the pull-up resistor to the gate of the first MOS transistor Q4; the first MOS transistor Q4 is an NMOS transistor, and the first MOS transistor Q4 is a main switch transistor of the voltage regulation output circuit; the second resistor R2 is a dummy load resistor.

Acting on the first modulation circuit 110, the power-on time master control chip U1 sends an address code through the transmitter TX. When the transmitting terminal TX is at a high level, the first triode Q1 is turned on, the gate of the first MOS transistor Q4 is at a low level, the second resistor R2-the first MOS transistor Q4-GND loop is disconnected, and VCC1 is the original working voltage, such as 36 VDC; when the transmitting terminal TX is at a low level, the first triode Q1 is cut off, the gate of the first MOS transistor Q4 is at a high level, the second resistor R2-the first MOS transistor Q4-GND loop is conducted, the voltage VCC1-GND of the driving output terminal P1 is equal to the dummy load of the parallel second resistor R2, the loop current is lost by the second resistor R2, and the voltage of the driving output terminal P1 is pulled down to 32 VDC.

In one implementation of the above embodiment, thefirst demodulation circuit 120 includes a tank circuit, a voltage regulation input circuit; the energy storage circuit and the voltage regulation input circuit are connected between the driving output end P1 and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the first control unit; the energy storage circuit receives the voltage change of the driving output end 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 circuit already stores energy in the energy storage device of the energy storage circuit, and when the LED lamp changes the voltage transformation between the driving output terminal P1 and the driving input terminal P2, the voltage of the energy storage circuit is output to the voltage regulation input circuit, thereby affecting the potential change of the receiving terminal of the first control unit.

Specifically, the energy storage circuit comprises a first diode D1, a second diode D2 and a first capacitor C1, and the voltage regulation input circuit comprises a second triode Q2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6 and a seventh resistor R7; one end of a first diode D1 is connected with the drive output end P1, the other end of the first diode D1 is connected with a second diode D2, the other end of the second diode D2 is respectively connected with a first capacitor C1, a fourth resistor R4 and a 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 with the base of a second triode Q2; an emitting electrode of the second triode Q2 is connected with the driving output end P1, a collector electrode of the second triode Q2 is respectively connected with the first control unit and the seventh resistor R7 through a sixth resistor, and the seventh resistor R7 is grounded. IN the present 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 and is an energy storage device; the fifth resistor R5 is a discharge resistor; the fourth resistor R4 is a current-limiting resistor; the second triode Q2 is a P-channel triode; the sixth resistor R6 and the seventh resistor R7 are voltage dividing resistors.

The working principle of the controller is that when a bus, namely a connection between a driving output end P1 and a driving input end P2, is normally connected and the voltage is 36VDC, a first diode D1 and a second diode D2 are conducted, the voltage at two ends of a first capacitor C1 is 34.6VDC, the base of a second triode Q2 is less than 0.7V, the conduction condition is met, a second triode Q2 is conducted, the voltage is divided to a receiving end RX of a first control unit through a sixth resistor R6 and a seventh resistor R7 to be 5V, and the receiving end RX of the first control unit is at a high level; when the bus voltage transient state is pulled down to 32VDC, the voltage of the first capacitor C1 cannot suddenly change, the voltage is slowly discharged, the voltage is regarded as voltage maintenance, the ideal voltage is still 34.6VDC, at this time, the first diode D1 and the second diode D2 are cut off, the base of the second triode does not meet the turn-on condition, the second triode Q2 is cut off, the sixth resistor R6 has no pull-up voltage, and the receiving terminal RX of the first control unit is set to be low by the seventh resistor R7.

In some embodiments, thefirst verification circuit 100 further includes a first power supply chip, a power input end of the first power supply chip is connected to the LED driver, and a power output end of the first power supply chip is connected to the first control unit; the power input end and the power output end of the first power supply chip are also connected with a filter capacitor. In an implementation manner of this embodiment, a power input end of the first power supply chip is connected to the LED driver, and a power output end of the first power supply chip is connected to the main control chip of thefirst verification circuit 100; in this embodiment, the first power chip is used for the power supply of the main control chip U1 of thefirst verification circuit 100, the first power chip includes the power chip U2, the input end of the first power chip U2 is connected with the first input power supply, the output end of the first power chip U2 is connected with 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 may be model RT 9068; the filter capacitor is used for filtering clutter, and the first input power VCC1 gets the bus and namely drives the voltage of output P1 department, converts to +5V, provides basic supply voltage for main control chip U1.

In some embodiments, the first switching circuit includes a third transistor and a second MOS transistor, a base of the third transistor is connected to the first calibration circuit, a collector is connected to a gate of the second MOS transistor, and an emitter is grounded; the drain of the second MOS transistor is connected to the driving output terminal P1, and the source is connected to the driving input terminal P2. In this embodiment, the base of the third transistor is connected to thefirst calibration circuit 100, the collector is connected to the gate of the second MOS transistor, and the emitter is grounded; the drain electrode of the second MOS tube is connected with the driving output end, and the source electrode of the second MOS tube is connected with the driving input end P2. In this embodiment, thefirst switch circuit 300 includes a third transistor Q3, a second MOS transistor Q5, a base of the third transistor Q3 is connected to thefirst verification circuit 100, a collector is connected to a gate of the second MOS transistor Q5, and an emitter is grounded; the drain of the second MOS transistor Q5 is connected to the driving output terminal P1, and the source is connected to the driving input terminal P2. The first switch circuit further comprises an eighth resistor R8 and a ninth resistor R9, 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 thefirst verification circuit 100. Thefirst switching circuit 300 is disposed in the LED driver, and is connected between the driving output terminal P1 and the driving input terminal P2.

Specifically, when the verification circuit is applied to thefirst verification circuit 100, the control end SW of the main control chip U1 defaults to a low level, the third triode Q3 is turned off, the ninth resistor R9 pulls up the base level of the third triode Q3, the third triode Q3 is turned on, and the bus loop is turned on; when the main control chip is electrified within 200mS and receives the starting address code, the control end SW keeps the original low level state; when the main control chip U1 is powered on for 200mS and does not receive the start address code, the control terminal SW is set high, the third triode Q3 is turned on, the gate of the second MOS transistor Q5 is pulled low, the second MOS transistor Q5 is turned off, the bus circuit is disconnected, and the lamp cannot be lighted.

Referring to fig. 2, fig. 3, fig. 4, and fig. 5, the present application further provides an LED lamp, which includes asecond verification circuit 200 and asecond switch circuit 400, the LED lamp is provided with a driving input terminal P2 connected to a driving output terminal P1 of the LED driver, and thesecond verification circuit 200 and thesecond switch circuit 400 are connected to the driving input terminal P2; thesecond verification circuit 200 controls thesecond switch circuit 400 to be turned on and off and sends a confirmation code to the LED driver by receiving the address code from the LED driver. In this embodiment, the driving output terminal P1 is an LED constant current driving power output terminal of the LED driver, and the driving input terminal P2 is an LED constant current driving power input terminal of the LED lamp, and is configured to provide a working power supply for the LED lamp. The principle of the LED lamp can be the same as that of the LED driver, and mutual verification can be achieved by respectively adopting the same circuit elements. Thesecond verification circuit 200 and thesecond switch circuit 400 are connected to the driving input terminal P2, and since the driving output terminal P1 is connected to the driving input terminal, thesecond verification circuit 200 receives and recognizes the address code of the LED driver and feeds back the confirmation code to the LED driver. A first check circuit which sends an address code and receives a confirmation code can be arranged in the LED driver; the LED driver of the application carries out interactive communication with the LED lamp through the first checking circuit. The LED lamp is arranged in the LED lamp, the address code of the LED driver is received through thesecond checking circuit 200, the confirmation code is sent to the LED driver, thesecond switch circuit 400 is conducted, and the connected LED driver is prevented from being faked.

In some embodiments, thesecond verification circuit 200 includes a second control unit, and asecond modulation circuit 210 and asecond demodulation circuit 220 connected to the second control unit; the second control unit is further connected to thesecond switch circuit 400, receives the address code of the LED driver through thesecond demodulation circuit 220, and outputs the confirmation code to the LED driver through the first modulation circuit 110, thereby controlling the on/off of thefirst 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 thesecond demodulation circuit 220, and outputs the confirmation code to the LED driver through thesecond modulation circuit 210, the first control unit identifies the address code, and if the confirmation code corresponds to the preset code, the second control unit controls thesecond switch circuit 400 to be continuously turned on; if the confirmation code is empty or cannot be recognized, thesecond switch circuit 400 is turned off.

In an implementation manner of the foregoing embodiment, the second 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 with thesecond modulation circuit 210, the receiving end is connected with thesecond demodulation circuit 220, and the switch end is connected with thesecond switch circuit 400. In this embodiment, the main control chip may be any series of chips of SN65HVD7x series/PIC 16(L) F18xx series; the main control chip is provided with a code sending and matching program; the burning circuit for burning the main control chip U1 comprises a burning connector, wherein a power supply end of the burning connector is connected with a second input power VCC2, and a burning output end of the burning connector is connected with a burning end ICE CLK, a burning end ICE DAT and a burning end ICE RST of the main control chip of thesecond verification circuit 200. The main control chip U1 is an anti-counterfeit identification circuit core device, and is provided with firmware connected with thesecond modulation circuit 210, thesecond demodulation circuit 220, and thesecond switch circuit 400, and a burning connector is reserved for facilitating production and debugging. Thesecond modulation circuit 210 and thesecond demodulation circuit 220 perform code matching through the TX and RX address codes of the transmitting terminal and the receiving terminal, recognize and execute bus on-off, that is, thesecond switch circuit 400 turns on or off the switch terminal SW.

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

Specifically, the trigger circuit comprises a first triode, a base electrode of the first triode is connected with the first control unit through a first resistor, a collector electrode of the first triode is connected with the voltage regulation output circuit, and an emitting electrode of the first triode is grounded. The trigger circuit receives a level signal of the second control unit through a base electrode of the first triode so as to control the voltage regulation output circuit;

specifically, the voltage regulation output circuit comprises a first MOS (metal oxide semiconductor) transistor, a second resistor and a third resistor, wherein the grid electrode of the first MOS transistor is respectively connected with the trigger circuit, the drain electrode is connected with the driving input end P2 through the second resistor, and the source electrode is grounded; the gate of the first MOS transistor is further connected to the driving input terminal P2 through a third resistor. The grid electrode of the first MOS tube controls the on-off of the first MOS tube by receiving a signal of the trigger circuit, and further changes the voltage of the first driving output end P1.

In thesecond modulation circuit 210, the first resistor is a current-limiting resistor, and the first triode is the MMBT4401 triode, which plays a role of reverse voltage; the third resistor provides a basic voltage for the grid electrode of the first MOS tube by the pull-up resistor; the first MOS tube is an NMOS tube, and the first MOS tube is a main switch tube of the voltage regulation output circuit; the second resistor is a dummy load resistor.

Acting on thesecond modulation circuit 210, the power-on time state main control chip sends an acknowledgement code through the transmitting terminal TX. When the transmitting terminal TX is at a high level, the first triode is turned on, the gate of the first MOS transistor is at a low level, the second resistor-the first MOS transistor-GND loop is disconnected, and VCC0 is a working voltage, such as 36VDC, of thesecond verification circuit 200 when the voltage of the LED driver received by thesecond verification circuit 200 is also the working voltage of thesecond verification circuit 200; when the transmitting end TX is at a low level, the first triode is cut off, the grid electrode of the first MOS tube is at a high level, the second resistor-the first MOS tube-GND loop is conducted, the voltage VCC0-GND transmitted by the driving output end P1 is equal to the dummy load of the second resistor in parallel, the loop current is lost by the second resistor, and the voltage of the driving output end P1 is pulled down to 32 VDC.

In one implementation of the above embodiment, thesecond demodulation circuit 220 includes a tank circuit, a voltage regulation input circuit; the energy storage circuit and the voltage regulation input circuit are connected between the driving input end P2 and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the second control unit; the tank circuit enables the voltage regulating input circuit to output the confirmation code to the first control unit by receiving the voltage change of the driving input terminal P2. In the embodiment, when the energy storage circuit is connected with the LED driver and the LED lamp, the energy storage device of the energy storage circuit stores electric energy; when the LED driver changes the voltage transformation between the driving output terminal P1 and the driving input terminal P2, the voltage of the energy storage circuit is output to the voltage regulation input circuit, thereby affecting the potential change of the receiving terminal of the first control unit.

Specifically, the energy storage circuit comprises a first diode, a second diode and a first capacitor, and the voltage regulation input circuit comprises a second triode, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor;

one end of a first diode is connected with the driving input end P2, the other end of the first diode is connected with a second diode, the other end of the second diode is respectively connected with a first capacitor, a fourth resistor and a 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 with the base electrode of a second triode; the emitting electrode of the second triode is connected with the driving input end P2, the collecting electrode of the second triode is respectively connected with the first control unit and the seventh resistor through the sixth resistor, and the seventh resistor is grounded. 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 and 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 dividing resistors.

The working principle of the circuit is that when a bus, namely a connection line between a driving output end P1 and a driving input end P2, is normally used as 36VDC, a first diode and a second diode are conducted, the voltage at two ends of a first capacitor is 34.6VDC, the base electrode of a second triode is less than 0.7V, the conduction condition is met, the second triode is conducted, voltage is divided to a receiving end through a sixth resistor and a seventh resistor R7 to be 5V, and the receiving end of a second control unit is at a high level; when the bus voltage is pulled down to 32VDC in a transient state, the voltage of the first capacitor cannot change suddenly and discharges slowly, the voltage is regarded as voltage maintenance, the ideal voltage is still 34.6VDC, the first diode and the second diode are cut off, the base electrode of the second triode does not meet the starting condition, the second triode is cut off, the sixth resistor has no pull-up voltage, and the receiving end of the second control unit is lowered by the seventh resistor.

In some embodiments, a power input end of the second power chip is connected to the LED lamp, and a power output end of the second power chip is connected to the main control chip of thesecond verification circuit 200. In this embodiment, the second power chip is used for the main control chip power supply ofsecond check circuit 200, and the second power chip includes the second power chip, and the input of first power chip is connected withsecond check circuit 200 high potential end VCC0, and the output of second power chip is connected with the main control chip and exports second input power VCC2, and the input of second power chip, output all are provided with filter capacitance. The second power chip may be model RT 9068; the filter capacitor is used for filtering clutter, and the first input power VCC1 takes the bus, namely the voltage of VCC0 at the drain of the second MOS transistor of thesecond verification circuit 200, and converts the bus into +5V, so as to provide a basic power supply voltage for the main control chip of thesecond verification circuit 200.

Thefirst switch circuit 300 comprises a third triode and a second MOS tube, wherein the base electrode of the third triode is connected with thefirst checking circuit 100 or thesecond checking circuit 200, the collector electrode of the third triode is connected with the grid electrode of the second MOS tube, and the emitter electrode of the third triode is grounded; the drain of the second MOS transistor is connected to the driving output terminal P1, and the source is connected to the driving input terminal P2. In this embodiment, thesecond switching circuit 400 includes a third transistor and a second MOS transistor, a base of the third transistor is connected to the second calibration circuit, a collector is connected to a gate of the second MOS transistor, and an emitter is grounded; the drain of the second MOS transistor is connected to the driving output terminal P1, and the source is connected to the driving input terminal P2. The second switch circuit further comprises an eighth resistor and a ninth resistor, wherein the eighth resistor is connected between the drain and the gate of the second MOS transistor, and the ninth resistor is connected between the base of the third triode and thesecond check circuit 200. Thesecond switch circuit 400 is disposed in the LED lamp and connected between the driving output terminal P1 and the driving input terminal P2.

Specifically, the high-level signal is applied to thesecond check circuit 200, the control end of the main control chip defaults to the high level, the second MOS transistor is cut off, and the lamp end bus loop is disconnected, so that the aim is to perform silent work in the code matching process of powering on the host and the slave within 200mS, and the LED lamp cannot be turned on. After the address code is analyzed, the control end of the main control chip is put low, the second MOS tube is conducted, and the LED lamp works normally in an electric lighting mode.

In the embodiments shown in fig. 6 and 7, the present application further discloses a verification system, comprising an LED driver, an LED lamp,

the LED driver comprises the LED driver;

the LED lamp comprises the LED lamp;

the driving output end P1 of the LED driver is connected with the driving input end P2 of the LED lamp, and the second check circuit controls the on-off of the second switch circuit and outputs a confirmation code to the LED driver by receiving the address code of the LED driver; the LED driver controls the on-off of the first switch circuit by receiving the confirmation code.

In this embodiment, the verification circuit of the present application is adapted to be driven by the constant current of the LED to the lamp, that is, between the driving output terminal P1 of the LED driver and the driving input terminal P2 of the LED lamp, and the core point is that the anti-counterfeit identification circuits are respectively added to the output of the constant current driving of the LED and the input of the LED lamp, the anti-counterfeit identification circuit of the driving output terminal P1 of the LED driver may be defined as the first verification circuit 100 (host), and the anti-counterfeit identification circuit of the input terminal of the LED lamp may be defined as the second verification circuit 200 (slave). When the LED constant current drives the output voltage, the main control chip of thefirst calibration circuit 100 actively sends an appointed signal, and the appointed signal is transmitted to the LED lamp at the two ends of the LED +/LED-in a direct current carrying mode. Thesecond calibration circuit 200 at the input of the LED lamp decodes the received signal. If the analysis and identification are correct, a series of starting address codes are sent to the emission main control circuit at the front stage, the codes are mutually matched and handshake is carried out, after the codes are successfully matched, thesecond switch circuit 400 is conducted and turned on, and the LED lamp is normally lightened. If the code matching fails or the circuit is missing in the next stage, thefirst switch circuit 300 is turned off, and the LED lamp cannot be turned on. This application is provided withfirst check circuit 100 between LED driver and LED lamps and lanterns,second check circuit 200, the first control unit offirst check circuit 100 sends the address code tosecond check circuit 200 throughfirst demodulation circuit 120, the second decoding circuit ofsecond check circuit 200 receives the address code and passes back to the second control unit and discerns, the second control unit discerns and informssecond switch circuit 400 to switch on after passing through, simultaneously through first decoding circuit tofirst demodulation circuit 120 output confirm the sign indicating number and controlfirst switch circuit 300 and continuously switch on, accomplish the electrical property check-up of LED lamps and lanterns and LED driver. Therefore, the LED lamp product is effectively prevented from being faked, and potential safety hazards caused by fake and inferior products used by consumers are avoided.

It should be understood that the above examples of the present application are only examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

An LED driver, comprising a first calibration circuit, a first switch circuit,
the LED driver is provided with a driving output end connected with a driving input end of the LED lamp, and the first calibration circuit and the first switch circuit are connected to the driving output end;
the first checking circuit controls the on-off of the first switch circuit by sending an address code to the LED lamp and receiving a confirmation code from the LED lamp.
2. The LED driver of claim 1, wherein the first verification circuit comprises 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 further connected with 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 so as to control the on-off of the first switch circuit.
3. The LED driver of claim 2, wherein the first control unit comprises a main control chip, the main control chip is provided with a transmitting terminal, a receiving terminal, and a switch terminal, the transmitting terminal is connected to the first modulation circuit, the receiving terminal is connected to the first demodulation circuit, and the switch terminal is connected to the first switch circuit.
4. The LED driver of claim 2, wherein the first modulation circuit comprises a trigger circuit, a voltage regulation output circuit,
the voltage regulating output circuit is connected between the driving output end and a power ground; the input end of the trigger circuit is connected with the first control unit, and the control end of the trigger circuit is connected with the voltage regulating output circuit;
the trigger circuit outputs an address code through the voltage regulation output circuit by receiving a level signal of the first control unit.
5. The LED driver of claim 4, wherein the trigger circuit comprises a first transistor, a base of the first transistor is connected to the first control unit through a first resistor, a collector of the first transistor is connected to the voltage regulation output circuit, and an emitter of the first transistor is grounded.
6. The LED driver of claim 4, wherein the voltage regulation output circuit comprises a first MOS transistor, a second resistor, and a third resistor,
the grid electrode of the first MOS tube is respectively connected with the trigger circuit, the drain electrode is connected with the driving output end through a second resistor, and the source electrode is grounded; and the grid electrode of the first MOS tube is also connected with the driving output end through a third resistor.
7. The LED driver of claim 2, wherein the first demodulation circuit comprises a tank circuit, a voltage regulation input circuit;
the energy storage circuit and the voltage regulation input circuit are both connected between the driving output end and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the first control unit;
the energy storage circuit receives the voltage change of the driving output end, so that the voltage regulating input circuit sends a confirmation code to the first control unit.
8. The LED driver of claim 7, wherein the tank circuit comprises a first diode, a second diode, and a first capacitor, and the regulator input circuit comprises a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
one end of the first diode is connected with the driving output end, the other end of the first diode is connected with the second diode, the other end of the second diode is respectively connected with 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 with the base electrode of the second triode; an emitting electrode of the second triode is connected with the driving output end, a collector electrode of the second triode is respectively connected with the first control unit and the seventh resistor through a sixth resistor, and the seventh resistor is grounded.
9. The LED driver of claim 2, wherein the first verification circuit further comprises a first power chip,
the power supply input end of the first power supply chip is connected with the LED driver, and the power supply output end of the first power supply chip is connected with the first control unit; and the power input end and the power output end of the first power supply chip are also connected with filter capacitors.
10. The LED driver of claim 1, wherein the first switching circuit comprises a third transistor, a second MOS transistor,
the base electrode of the third triode is connected with the first checking circuit, the collector electrode of the third triode is connected with the grid electrode of the second MOS tube, and the emitter electrode of the third triode is grounded; and the drain electrode of the second MOS tube is connected with the drive output end, and the source electrode of the second MOS tube is connected with the drive input end.
An LED lamp, characterized by comprising a second calibration circuit, a second switch circuit,
the LED lamp is provided with a driving input end connected with the driving output end of the LED driver, and the second calibration circuit and the second switch circuit are connected to the driving input end;
the second check circuit controls the on-off of the second switch circuit and sends a confirmation code to the LED driver by receiving an address code from the LED driver.
12. The LED light fixture of claim 11 wherein the second calibration 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 further connected with the second switch circuit, receives the address code of the LED driver through a second demodulation circuit, and outputs a confirmation code to the LED driver through a first modulation circuit so as to control the on-off of the first switch circuit.
13. The LED lamp according to claim 12, wherein the second control unit comprises a main control chip, the main control chip is provided with a transmitting terminal, a receiving terminal, and a switch terminal, the transmitting terminal is connected to the second modulation circuit, the receiving terminal is connected to the second demodulation circuit, and the switch terminal is connected to the second switch circuit.
14. The LED lamp of claim 12, wherein the second modulation circuit comprises a trigger circuit, a voltage regulation output circuit,
the voltage regulating output circuit is connected between the driving input end and a power ground; the input end of the trigger circuit is connected with the second control unit, and the control end of the trigger circuit is connected with the voltage regulating output circuit;
the trigger circuit outputs the confirmation code through the voltage regulation output circuit by receiving the level signal of the second control unit.
15. The LED lamp of claim 14, wherein the trigger circuit comprises a first transistor, a base of the first transistor is connected to the first control unit via a first resistor, a collector of the first transistor is connected to the voltage regulation output circuit, and an emitter of the first transistor is grounded.
16. The LED lamp of claim 14, wherein the voltage regulation output circuit comprises a first MOS transistor, a second resistor, and a third resistor,
the grid electrode of the first MOS tube is respectively connected with the trigger circuit, the drain electrode is connected with the driving input end through a second resistor, and the source electrode is grounded; and the grid electrode of the first MOS tube is also connected with the driving input end through a third resistor.
17. The LED light fixture of claim 11 wherein the second demodulation circuit comprises a tank circuit, a voltage regulation input circuit;
the energy storage circuit and the voltage regulation input circuit are both connected between the driving input end and a power ground, the energy storage circuit is also connected with the voltage regulation input circuit, and the voltage regulation input circuit is also connected with the second control unit;
the energy storage circuit receives the voltage change of the driving input end, so that the voltage regulating input circuit outputs an address code to the second control unit.
18. The LED lamp of claim 17, wherein the tank circuit comprises a first diode, a second diode, and a first capacitor, and the voltage regulation input circuit comprises a second transistor, a fourth resistor, a fifth resistor, a sixth resistor, and a seventh resistor;
one end of the first diode is connected with the driving input end, the other end of the first diode is connected with the second diode, the other end of the second diode is respectively connected with 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 with the base electrode of the second triode; an emitting electrode of the second triode is connected with the driving input end, a collector electrode of the second triode is respectively connected with the first control unit and the seventh resistor through a sixth resistor, and the seventh resistor is grounded.
19. The LED lamp of claim 12, wherein the second verification circuit further comprises a second power chip,
the power supply input end of the second power supply chip is connected with the LED driver, and the power supply output end of the second power supply chip is connected with the second control unit; and the power input end and the power output end of the second power supply chip are also connected with filter capacitors.
20. The LED lamp of claim 11, wherein the second switch circuit comprises a third transistor and a second MOS transistor,
the base electrode of the third triode is connected with the second check circuit, the collector electrode of the third triode is connected with the grid electrode of the second MOS tube, and the emitter electrode of the third triode is grounded; and the drain electrode of the second MOS tube is connected with the drive output end, and the source electrode of the second MOS tube is connected with the drive input end.
21. A verification system comprising the LED driver of any one of claims 1-10, the LED light fixture of any one of claims 11-20;
the driving output end of the LED driver is connected with the driving input end of the LED lamp, and the second checking circuit controls the on-off of the second switch circuit and outputs a confirmation code to the first checking circuit by receiving the address code of the first checking circuit; and the first checking circuit controls the on-off of the first switch circuit by receiving the confirmation code.