WO2018068407A1

WO2018068407A1 - Light bar discharge testing method and device

Info

Publication number: WO2018068407A1
Application number: PCT/CN2016/112708
Authority: WO
Inventors: 王坚
Original assignee: 深圳Tcl数字技术有限公司
Priority date: 2016-10-13
Filing date: 2016-12-28
Publication date: 2018-04-19
Also published as: CN106501687A; CN106501687B

Abstract

Disclosed are a light bar (10) discharge testing method and device. The light bar (10) discharge testing method comprises the following steps: when receiving a first signal that an LED drive device (20) drives the light bar (10) to work, outputting a high-voltage pulse to a connecting line (14), so that an LED lamp (13) carries out ground discharge (S100); when detecting a second signal that the LED lamp (13) carries out ground discharge, controlling the ground discharge current of the LED lamp (13) so that same is gradually increased (S200); and when detecting that the LED lamp (13) carries out self-maintained discharge on the ground, stopping the output of the high-voltage pulse to the connecting line (14) (S300). The discharge testing of the light bar (10) can be completed.

Description

Light bar discharge test method and device

Technical field

The invention relates to the technical field of light bar discharge detection, in particular to a lamp bar discharge test method and device.

Background technique

The LED drive system includes an LED driver and a light bar. Here, the circuit structure of the LED driving device is referred to FIG. 1, and the structure of the light bar is referred to FIG. 2 and FIG.

In FIG. 1, the LED driving device includes an electronic component such as a voltage output terminal P1, a driving output terminal P2, and an inductor Lx, a first rectifier diode Dx, an output capacitor Cx, an electronic switch K, a PWM control chip, and a driving switch tube Qx. The working principle is: the inductor Lx stores energy through the input power UI. When the electronic switch K is disconnected, the energy storage superimposed input power UI of the inductor Lx charges the output capacitor Cx through the first rectifier diode Dx, so that the input can be input. The low voltage boost becomes a high voltage output. Changing the output duty cycle of the PWM control chip can change the multiple of the boost. Typically, the output voltage is between 1.5 and 5 times the input voltage.

2 and 3, the light bar includes a light board 11, the first side of the light board 11 is provided with a metal layer 12, and the second side opposite to the first side is provided with a positive terminal 15, a negative terminal 16, and A plurality of LED lamps 13 connected in series are connected in series, and a connection line 14 connecting the LED lamps 13 is disposed in the lamp panel 11.

The positive terminal 15 of the light bar is connected to the voltage output terminal P1 of the LED driving device, and the negative terminal 16 is connected to the driving output terminal P2 of the LED driving device, so that the LED driving device can drive the light bar to operate.

However, in the process of the LED driving device driving the light bar, if the insulation of the lamp plate is not good enough, the light bar will discharge to the ground through the lamp plate. Moreover, the discharge may evolve from a glow discharge to an arc discharge and generate a high temperature, which further deteriorates the insulation of the lamp panel until a carbonization of the lamp panel occurs. Therefore, before the LED drive system is put into use, it is necessary to perform a discharge test on the light bar.

Summary of the invention

The main object of the present invention is to provide a lamp strip discharge test method aimed at completing a discharge test of a light bar.

In order to achieve the above object, the present invention provides a light bar discharge test method, the light bar includes a light board, and the first side of the light board is provided with a metal layer, and the metal layer is grounded through a ballast device. The second side opposite to the first side is mounted with a plurality of LED lamps connected in series in series, and the lamp panel is provided with a connection line connecting the LED lamps; wherein the lamp strip discharge test method comprises the following steps:

Receiving a high voltage pulse to the connection line when the LED driving device drives the first signal of the operation of the light bar to discharge the LED lamp to the ground;

When detecting the second signal of the LED lamp discharging to the ground, controlling the discharge current of the LED lamp to the ground to gradually increase;

When it is detected that the LED lamp generates a self-sustaining discharge to the ground, the output of the high voltage pulse to the connecting line is stopped.

Correspondingly, the present invention further provides a light bar discharge test device, wherein the first side of the light panel is provided with a metal layer, the metal layer is grounded, and the second side opposite to the first side is mounted with a plurality of a LED lamp connected in series, wherein the lamp panel is provided with a connection line connecting each of the LED lamps; wherein the lamp bar discharge test device comprises: a high voltage pulse output module, configured to receive the LED driver to drive the light bar to work a first signal, a high voltage pulse is outputted to the connection line to discharge the LED lamp to the ground; and a current adjustment module is configured to control the second signal when the LED lamp is discharged to the ground The discharge current of the LED lamp to the ground gradually increases; the high voltage pulse output module is further configured to stop outputting a high voltage pulse to the connection line when detecting that the LED lamp generates a self-sustaining discharge to the ground.

Preferably, the light bar discharge test device further includes a ballast device, an input end of the ballast device is connected to the metal layer, and an output end of the ballast device is grounded.

Preferably, the ballast device comprises a potentiometer, the input of the potentiometer is an input of the ballast device, and the output of the potentiometer is an output of the ballast device.

Preferably, the light bar discharge testing device further includes: an LED driving device protection module, configured to cut off a high voltage pulse into the first signal when receiving the first signal that the LED driving device drives the light bar to work The path of the LED driver.

Preferably, the LED driving device protection module comprises a first diode, an anode of the first diode is connected to a voltage output end of the LED driving device, a cathode of the first diode is The positive terminal of the light bar is connected.

Preferably, the LED driver protection module further includes a second diode, an anode of the second diode is connected to the ballast device, and a cathode of the second diode is grounded.

Preferably, the high voltage pulse output module comprises a voltage input terminal, a voltage output terminal, a current limiting resistor, a second rectifier diode, a charging capacitor, a solid discharge tube and a transformer having a primary winding and a secondary winding, the current limiting resistor The first end is connected to the first end of the voltage input terminal, the second end of the current limiting resistor is connected to the anode of the second rectifier diode, the cathode of the second rectifier diode, and the solid discharge tube The first end and the first end of the charging capacitor are interconnected, and the second end of the first charging capacitor is connected to the first end of the primary winding, the second end of the primary winding, the solid discharge tube The second end is interconnected with the second end of the voltage input terminal; the first end of the secondary winding is coupled to the first end of the voltage output terminal, and the second end of the secondary winding is The second end of the voltage output terminal is connected.

Preferably, the light bar discharge test device further includes: a short circuit protection module, configured to cut off an operating current of the light bar to the high voltage pulse output module when detecting a second signal of the LED lamp discharging to the ground Pathway.

Preferably, the short circuit protection module includes a third diode, a cathode of the third diode is connected to the connection line, an anode of the third diode and an output end of the high voltage pulse output module connection.

The technical scheme of the present invention triggers the discharge of the LED lamp to the ground by outputting a high voltage pulse to the connection line between the adjacent two LED lamps, and after the LED lamp is discharged to the ground, the discharge current of the LED lamp to the ground is gradually increased, and the current is restored. The actual discharge process of the light bar. Therefore, the technical solution of the present invention can complete the test of the discharge of the light bar.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and those skilled in the art can obtain other drawings according to the structures shown in the drawings without any creative work.

1 is a schematic diagram showing the circuit structure of an embodiment of an LED driving device;

Figure 2 is a plan view of an embodiment of a light bar;

Figure 3 is a schematic cross-sectional view taken along line A-A of Figure 2;

4 is a schematic flow chart of an embodiment of a method for testing a discharge of a light bar according to the present invention;

5 is a schematic diagram of functional modules of an embodiment of a light bar discharge test device according to the present invention;

6 is a schematic structural diagram of a circuit of an embodiment of a light bar discharge test device according to the present invention;

FIG. 7 is a schematic diagram showing the circuit structure of an embodiment of the high voltage pulse generator of FIG. 6. FIG.

Description of the reference numerals:

Label	name	Label	name	Label	name
10	Light	100	High voltage pulse output module	D1	First diode
11	Light board	200	Current regulation module	D2	Second diode
12	Metal layer	Lx	inductance	D3	Third diode
13	LED light	Dx	First rectifier diode	Rs	Current limiting resistor
14	Cable	K	electronic switch	Ds	Second rectifier diode
15	Positive terminal	Cx	Output capacitor	Cs	Charging capacitor
16	Negative terminal	Qx	Drive switch	T	transformer
20	LED driver	P1	Voltage output	Lp	Primary winding
30	High voltage pulse generator	P2	Drive output	Ls	Secondary winding
31	Solid discharge tube	RW	Potentiometer
40	Ballast device

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

It should be noted that if all the directional indications (such as up, down, left, right, front, back, ...) in the embodiment of the present invention are only used to explain the components in a certain posture (as shown in the drawing) The relative positional relationship, the motion situation, and the like, if the specific posture changes, the directionality indication also changes accordingly.

In addition, the descriptions of "first", "second", and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In addition, the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.

The invention provides a light bar discharge test method, and the use thereof comprises, but is not limited to, whether the insulation design of the light strip is qualified; and the protection effect of the LED drive device with the function of preventing the discharge of the light strip is checked.

Referring to Figures 3 and 6, the light bar 10 includes a light board 11 having a metal layer 12 disposed on a first side thereof, the metal layer 12 being grounded by a ballast device 40, and mounted on a second side opposite the first side There are a plurality of LED lamps 13 connected in series in series, and a connection line 14 connecting the LED lamps 13 is disposed in the lamp panel 11.

Referring to FIG. 4, in an embodiment, the above method for discharging a light bar includes the following steps:

S100: when receiving the first signal that the LED driving device 20 drives the operation of the light bar 10, output a high voltage pulse to the connecting line 14 to discharge the LED lamp 13 to the ground;

It can be understood that the LED driving device 20 drives the light bar 10 to operate, which is a necessary and insufficient condition for the discharge phenomenon of the light bar 10. Therefore, by outputting a high voltage pulse to the connection line 14 between the adjacent two LED lamps 13, the voltage applied to the LED lamp 13 can be increased, thereby triggering the LED lamp 13 to discharge to the ground. Further, upon receiving the first signal that the LED driving device 20 drives the operation of the light bar 10, the high voltage pulse is output to the connecting line 14, and the process of discharging the light bar 10 can be more realistically restored.

It should be noted that the first signal is acquired in various manners, for example, by detecting whether there is an operating current between the positive terminal 15 and the negative terminal 16 of the light bar 10, or by detecting the light bar 10 Whether the LED lamp 13 in the light is emitted or not is obtained by detecting the voltage of the voltage output terminal P1 of the LED driving device 20, etc., and is not limited herein.

In addition, the high voltage pulse signal may be a periodic signal, and the amplitude of the high voltage pulse signal gradually increases during a minimum period; or, in any period, the amplitude of the high voltage pulse signal is equal. The high-voltage pulse signal may also be a non-periodic signal, and the amplitude change thereof is not limited herein.

S200: when detecting the second signal of the LED lamp 13 discharging to the ground, controlling the discharge current of the LED lamp 13 to the ground to gradually increase;

It should be noted that the second signal is acquired in various manners, for example, by detecting whether there is a discharge current between the LED lamp 13 and the ground, or by detecting the temperature of the light board 11, etc., There are no restrictions here.

In addition, there are various ways to control the discharge current of the LED lamp 13 to the ground gradually increasing, for example, increasing the amplitude of the output high voltage pulse, or reducing the resistance of the ballast device 40, etc., here No restrictions.

S300: When it is detected that the LED lamp 13 generates a self-sustaining discharge to the ground, the output of the high-voltage pulse to the connection line 14 is stopped.

It can be understood that, after the LED lamp 13 generates a self-sustaining discharge to the ground, the discharge of the LED lamp 13 continues even if the high-voltage pulse is not outputted to the connection line 14.

It should be noted that there are various ways to obtain the self-sustaining discharge of the LED lamp 13 to the ground, for example, suspending the output of the high-voltage pulse to the connection line 14, and if the LED lamp 13 is still detected to discharge to the ground, the LED lamp 13 has been Produce a self-sustaining discharge to the ground. Alternatively, when the high-voltage pulse amplitude is zero, if the LED lamp 13 is detected to discharge to the ground, it indicates that the LED lamp 13 has generated a self-sustaining discharge to the ground.

The technical solution of the present invention triggers the discharge of the LED lamp 13 to the ground by outputting a high voltage pulse to the connection line 14 between the adjacent two LED lamps 13, and after the LED lamp 13 is discharged to the ground, the discharge current of the LED lamp 13 to the ground is gradually controlled. Increased, the actual discharge process of the light bar 10 is restored. Therefore, the technical solution of the present invention can complete the test of discharging the light bar 10.

Correspondingly, the present invention also provides a light bar discharge test device.

Referring to FIG. 3 and FIG. 6 , the light bar 10 includes a light board 11 . The first side of the light board 11 is provided with a metal layer 12 . The metal layer 12 is grounded, and a plurality of second sides opposite to the first side are mounted. The LED lamps 13 connected in series are connected in series, and the lamp board 11 is provided with a connecting line 14 for connecting the LED lamps 13.

Referring to FIG. 5, in an embodiment, the light bar discharge test device includes a high voltage pulse output module 100 and a current adjustment module 200;

The high voltage pulse output module 100 is configured to output a high voltage pulse to the connection line 14 when the LED driving device 20 receives the first signal of the operation of the light bar 10 to discharge the LED lamp 13 to the ground;

The current adjustment module 200 is configured to control the discharge current of the LED lamp 13 to the ground to gradually increase when detecting the second signal of the LED lamp 13 discharging to the ground;

In addition, there are various ways to control the discharge current of the LED lamp 13 to the ground gradually increasing, for example, increasing the amplitude of the output high voltage pulse.

The high-voltage pulse output module 100 is further configured to stop outputting a high-voltage pulse to the connection line 14 when detecting that the LED lamp 13 generates a self-sustaining discharge to the ground.

It should be noted that there are various ways to obtain the self-sustaining discharge of the LED lamp 13 to the ground. For example, the high-voltage pulse output module 100 is suspended to output a high-voltage pulse to the connection line 14, and if the LED lamp 13 is still detected to discharge to the ground, At this time, the LED lamp 13 has generated a self-sustaining discharge to the ground. Alternatively, when the high-voltage pulse output value outputted by the high-voltage pulse output module 100 is zero, if the LED lamp 13 is detected to discharge to the ground, it indicates that the LED lamp 13 has generated a self-sustaining discharge to the ground.

The technical solution of the present invention outputs a high voltage pulse to the connection line 14 between the adjacent two LED lamps 13 through the high voltage pulse output module 100 to trigger the LED lamp 13 to discharge to the ground, and after the LED lamp 13 is discharged to the ground, the LED lamp 13 is controlled. The discharge current of the ground gradually increases, and the actual discharge process of the light bar 10 is restored. Therefore, the technical solution of the present invention can complete the test of discharging the light bar 10.

It is worth mentioning that, in order to avoid the self-sustaining discharge of the LED lamp 13 to the ground, the fire is caused by the excessive discharge current of the LED lamp 13 to the ground, and generally, between the metal layer 12 of the light bar 10 and the ground. A ballast device 40 is provided. Thus, the discharge current of the LED lamp 13 to the ground can be adjusted by the ballast device 40.

Preferably, referring to FIG. 6, the ballast device 40 is a potentiometer RW, the input end of the potentiometer RW is connected to the metal layer 12, and the output end of the potentiometer RW is grounded.

It should be noted that the ballast device 40 may be a resistor module in which a plurality of resistors (not shown) are connected in parallel with a series connection structure of a corresponding control switch (not shown). In this way, the resistance of the resistor module can be changed by changing the on state of the control switch. However, the use of the potentiometer RW as the ballast device 40 simplifies the device structure and saves costs.

Further, the above-mentioned light bar discharge testing device further includes an LED driving device protection module (not shown) for cutting off the high-voltage pulse injection into the LED driving when receiving the first signal that the LED driving device 20 drives the light bar 10 to work. The passage of device 20.

It can be understood that when the amplitude of the high voltage pulse outputted by the high voltage pulse output module 100 is higher than the voltage amplitude outputted by the voltage output terminal P1 of the LED driving device 20, the high voltage pulse may be injected into the LED through the LED lamp 13 and the positive terminal 15. The drive unit 20, in turn, causes damage to the LED drive unit 20. Upon receiving the first signal that the LED driving device 20 drives the operation of the light bar 10, the path of the high voltage pulse injected into the LED driving device 20 is cut off, and the LED driving device 20 can be protected.

Specifically, referring to FIG. 6, the LED driving device protection module includes a first diode D1, and an anode of the first diode D1 is connected to a voltage output terminal P1 of the LED driving device 20, and a cathode of the first diode D1 is The positive terminal 15 of the light bar 10 is connected.

It is easy to understand that the diode has a single-conductivity. When the LED driving device 20 drives the light bar 10 to operate normally, the first diode D1 is forward-conducting; when the high-voltage pulse output module 100 outputs a high-voltage pulse to the connecting line 14, the first Diode D1 is reverse turned off. Thus, when the light bar 20 is subjected to a discharge test, the high voltage pulse output from the high voltage pulse output module 100 is not injected into the LED driving device 20 through the LED lamp 13 and the positive terminal 15.

It is worth mentioning that the LED driver protection module may further include a device having a unidirectional conduction property such as a triode, which is not limited herein.

Further, referring to FIG. 6, the LED driving device protection module further includes a second diode D2, the anode of the second diode D2 is connected to the ballast device 40, and the cathode of the second diode D2 is grounded.

It is easy to understand that the second diode D2 can ensure that the discharge current of the light bar 10 flows to the ground while preventing the high voltage pulse from being poured to the LED driving device.

Further, the above-mentioned light bar discharge test device further includes: a short circuit protection module (not shown) for cutting off the operating current of the light bar 10 to the high voltage pulse output when detecting the second signal of the LED lamp 13 discharging to the ground The path of module 100.

It is worth mentioning that, in an embodiment, the high voltage pulse output module 100 includes a high voltage pulse generator 30, and the circuit structure of the high voltage pulse generator 30 is as shown in FIG. In Fig. 7, the high voltage pulse generator 30 includes a current limiting resistor Rs, a second rectifying diode Ds, a charging capacitor Cs, a solid discharge tube 31, and a transformer T having a primary coil Lp and a secondary coil Ls. During the positive half cycle of the AC input AC, the charging capacitor Cs is charged by the current limiting resistor Rs and the second rectifier diode Ds. When the voltage applied to the charging capacitor Cs reaches the operating voltage of the solid discharge tube 31, the solid discharge tube 31 undergoes avalanche breakdown. And conduct. The charging capacitor Cs resonates through the solid discharge tube 31 and the primary coil Lp of the transformer T, so that the primary of the transformer T generates a high voltage, and the solid discharge tube 31 is turned off after the discharge of the charging capacitor Cs is completed. By repeating the above process, the secondary winding Ls of the transformer T generates a high voltage pulse output. The size of the charging capacitor Cs can determine the energy intensity of the output high voltage pulse. Changing the voltage amplitude of the AC input AC can change the intermittent time of the output high voltage pulse. Changing the ratio of the primary winding Lp of the transformer T to the secondary coil Ls can change the level of the output high voltage pulse. .

It can be understood that when the light bar 10 is subjected to a discharge test, the operating current of the light bar 10 may flow to the ground through the secondary coil Ls of the high voltage pulse generator 30, which is very dangerous. When the second signal of the LED lamp 13 discharging to the ground is detected, the operating current of the light bar 10 is cut off to the path of the high voltage pulse output module, and the operating current of the light bar 10 can be prevented from flowing to the secondary coil Ls of the high voltage pulse generator 30. Ground.

Preferably, referring to FIG. 6, the short circuit protection module includes a third diode D3, the cathode of the third diode D3 is connected to the connection line 14, the anode of the third diode D3 and the output end of the high voltage pulse output module 100. connection.

It is easy to understand that the diode has a single-conductivity. When the high-voltage pulse generator 30 outputs a high-voltage pulse to the connection line, the third diode D3 is forward-conducting; if the operating current of the light bar 10 is to pass the high-voltage pulse generator 30 The stage coil Ls flows to the ground, and the third diode D3 is reversely turned off. Thus, when the high voltage pulse generator 30 outputs a high voltage pulse to the connection line 14, the operating current of the light bar 10 does not flow to the ground through the secondary coil Ls of the high voltage pulse generator 30.

It is worth mentioning that the short circuit protection module may further include a device having a unidirectional conduction property such as a triode, which is not limited herein.

Hereinafter, how the present invention performs a discharge test on the light bar 10 will be described with reference to FIGS. 1, 2, 3, 5, 6, and 7.

First, connect the tested circuit with reference to FIG. 6.

Then, the LED driving device 20 is caused to drive the light bar 10 to operate.

Next, the high voltage pulse generator 30 is caused to output an intermittent high voltage pulse to the connection line 14, and its amplitude is gradually increased to discharge the LED lamp 13 to the ground.

Next, the resistance of the potentiometer RW is reduced, and the discharge current of the LED lamp 13 to the ground is increased to cause the LED lamp 13 to generate a self-sustaining discharge.

Finally, the high voltage pulse generator 30 is turned off to detect the effect of the light strip discharge on the LED drive system.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structural transformation, or direct/indirect use, of the present invention and the contents of the drawings are used in the inventive concept of the present invention. It is included in the scope of the patent protection of the present invention in other related technical fields.

Claims

A light bar discharge test method, the light bar includes a light board, the first side of the light board is provided with a metal layer, the metal layer is grounded through a ballast device, and the second side is opposite to the first side A plurality of LED lamps connected in series are arranged in the side, and the lamp panel is provided with a connection line connecting the LED lamps. The lamp strip discharge test method comprises the following steps:

Receiving a high voltage pulse to the connection line when the LED driving device drives the first signal of the operation of the light bar to discharge the LED lamp to the ground;

When detecting the second signal of the LED lamp discharging to the ground, controlling the discharge current of the LED lamp to the ground to gradually increase;

When it is detected that the LED lamp generates a self-sustaining discharge to the ground, the output of the high voltage pulse to the connecting line is stopped.
A light bar discharge test device, the light bar includes a light board, the first side of the light board is provided with a metal layer, the metal layer is grounded, and a plurality of second sides opposite to the first side are mounted a LED lamp connected in series, wherein the lamp panel is provided with a connection line connecting the LED lamps; wherein the lamp strip discharge test device comprises:

a high-voltage pulse output module, configured to output a high-voltage pulse to the connection line when receiving the first signal of the LED driver driving the light bar to discharge the LED lamp to the ground;

a current adjustment module, configured to control a discharge current of the LED lamp to the ground to gradually increase when detecting the second signal of the LED lamp discharging to the ground;

The high voltage pulse output module is further configured to stop outputting a high voltage pulse to the connection line when detecting that the LED lamp generates a self-sustaining discharge to the ground.
A light bar discharge test apparatus according to claim 2, wherein said light bar discharge test device further comprises a ballast device, an input end of said ballast device being connected to said metal layer, said ballast device The output is grounded.
A light bar discharge test apparatus according to claim 3, wherein said ballast means comprises a potentiometer, an input end of said potentiometer is an input end of said ballast means, and an output end of said potentiometer It is the output of the ballast device.
The light bar discharge test apparatus according to claim 2, wherein the light bar discharge test device further comprises:

And an LED driving device protection module configured to cut off a path for injecting a high voltage pulse into the LED driving device when receiving the first signal that the LED driving device drives the operation of the light bar.
A light bar discharge test apparatus according to claim 5, wherein said LED drive protection module comprises a first diode, an anode of said first diode and a voltage output of said LED drive Connected, the cathode of the first diode is connected to the positive terminal of the light bar.
The light bar discharge testing device according to claim 6, wherein the LED driving device protection module further comprises a second diode, and an anode of the second diode is connected to the ballast device. The cathode of the second diode is grounded.
The light bar discharge test device according to claim 2, wherein the high voltage pulse output module comprises a voltage input terminal, a voltage output terminal, a current limiting resistor, a second rectifier diode, a charging capacitor, a solid discharge tube, and a primary device. a transformer of the winding and the secondary winding, the first end of the current limiting resistor is connected to the first end of the voltage input terminal, and the second end of the current limiting resistor is connected to the anode of the second rectifier diode a cathode of the second rectifier diode, a first end of the solid discharge tube, and a first end of the charging capacitor are interconnected, and a second end of the first charging capacitor is connected to the first end of the primary winding a second end of the primary winding, a second end of the solid discharge tube, and a second end of the voltage input terminal; a first end of the secondary winding and a first end of the voltage output terminal Connected, the second end of the secondary winding is coupled to the second end of the voltage output terminal.
The light bar discharge test apparatus according to claim 2, wherein the light bar discharge test device further comprises:

The short circuit protection module is configured to cut off a working current of the light bar to the high voltage pulse output module when detecting the second signal of the LED lamp discharging to the ground.
The light bar discharge testing device according to claim 9, wherein the short circuit protection module comprises a third diode, and a cathode of the third diode is connected to the connecting line, the third two The anode of the pole tube is connected to the output of the high voltage pulse output module.