Backlight module test box

Abstract

The utility model provides a backlight module test box, which comprises a box body, a voltmeter, an ampere meter, a resistance meter, an alarm device, a controller and a power supply module, the voltmeter, the ampere meter, the resistance meter, the alarm device and the power supply module are electrically connected with the controller, and a first display screen of the box body is used for displaying numerical values of the voltmeter and the ampere meter. The second display screen is used for displaying the numerical value of the resistance meter, the power supply module is used for supplying power to the controller, the alarm device and the tested power supply module, the controller monitors the numerical values of the voltmeter, the ammeter and the resistance meter in real time, and when the controller detects that the voltmeter is 0 or the ammeter is 0, the controller judges that the tested backlight module is short-circuited or open-circuited. And the alarm device automatically gives an alarm. The backlight module test box can solve the problem that components or circuits of the backlight module are damaged due to detection errors of operators in the prior art, realizes multi-functionalization and intelligentization of detection, and increases the yield of the backlight module.

Description

Technical Field

[0001] This utility model relates to the field of testing equipment technology, and in particular to a backlight module test box. Background Technology

[0002] In recent years, with the increasing awareness of driving safety, in-vehicle displays have developed rapidly in the automotive electronics field. They provide real-time monitoring of the external environment for drivers and passengers, ensuring safe driving and becoming an indispensable part of traffic safety. Automakers are placing increasingly higher demands on the quality of in-vehicle displays, and at the same time, they are also raising the requirements for the electrical safety and reliability of the backlight. During the manufacturing process of the backlight module, human error can lead to damage to the backlight LEDs, NTC or FPC electronic components, and backlight circuitry. Alternatively, during testing, improper wiring or incorrect polarity can cause a sudden surge of current that damages the backlight module. This can result in the backlight module failing to illuminate or affecting the normal display of the screen, reducing the yield rate of the backlight module and increasing manufacturing costs. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a backlight module test box, which can solve the problem of damage to backlight module components or circuits caused by operator error in the prior art, realize multi-functional and intelligent testing, and increase the yield of backlight modules.

[0004] This utility model provides a backlight module test box, including a housing, a voltmeter, an ammeter, a resistor, an alarm device, a controller, and a power module. The voltmeter, ammeter, resistor, alarm device, and power module are respectively disposed in the housing and electrically connected to the controller. The surface of the housing is provided with a first display screen and a second display screen. The first display screen is used to display the values ​​of the voltmeter and ammeter, and the second display screen is used to display the value of the resistor. The power module is used to supply power to the controller, the alarm device, and the power module under test. The alarm device is electrically connected to the controller. The controller monitors the values ​​of the voltmeter, ammeter, and resistor in real time. When the controller detects that the voltmeter or ammeter is 0, the controller determines that the backlight module under test is short-circuited or open-circuited, and the alarm device automatically sounds an alarm.

[0005] In one embodiment, the backlight module test box includes an automatic adjustment Zener diode and a carbon film resistor. The backlight module test box also includes a power adapter, which is electrically connected to the automatic adjustment Zener diode and the carbon film resistor. The power adapter is used to connect to the backlight module under test to output constant current and constant voltage. The automatic adjustment Zener diode and the carbon film resistor are used to protect the circuit safety of the backlight module under test.

[0006] In one embodiment, the backlight module test box includes a first indicator light, which is electrically connected to the controller. When the controller determines that the backlight module is short-circuited, the first indicator light illuminates red.

[0007] In one embodiment, the backlight module test box further includes a DIP switch for adjusting the current of the backlight module under test.

[0008] In one embodiment, the backlight module test box further includes a power switch, a low current check switch, and a short circuit check switch. The power switch is used to turn the backlight module test box on or off. The low current check switch is used to detect the low current of the backlight module under test. When the short circuit check switch is turned on, the backlight module test box tests the circuit of the backlight module under test.

[0009] In one embodiment, the backlight module test box further includes a power switch, which is used to turn on or off the light strip or light board of the backlight module under test to test the integrity of the LED lights of the light strip or light board.

[0010] In one embodiment, the backlight module test box further includes a second indicator light. When the resistance value of the thermistor of the backlight module being tested is not within the set range, the second indicator light illuminates, and the alarm device sounds an alarm.

[0011] In one embodiment, the backlight module test box further includes a display panel, which is electrically connected to the controller and is used to display the cause of failure of the backlight module under test.

[0012] In one embodiment, the voltage value of the backlight module test box is 3V~36V.

[0013] This utility model's backlight module test box can monitor and analyze the values ​​of voltmeter, ammeter, and ohmmeter in real time through a controller. When the backlight module under test has a short circuit, open circuit, or damaged thermistor, the alarm device will automatically sound an alarm to prevent defective products from leaving the market. This backlight module test box can achieve multi-functional and intelligent testing, eliminating the need for manual testing and adjustment. It is simple to operate, improves work efficiency, and effectively prevents damage to components and product circuits caused by human error. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a structural schematic diagram of the backlight module test box of this utility model.

[0016] Figure 2 This is a schematic diagram of the backlight module test box of this utility model with the display panel in a standing position.

[0017] Reference numerals: Box body - 11; Voltmeter - 12; Ammeter - 13; Resistance meter - 14; First display screen - 151; Second display screen - 152; First indicator light - 161; Second indicator light - 162; DIP switch - 171; Power switch - 172; Low current check switch - 173; Short circuit check switch - 174; Light switch - 175; Display panel - 18.

[0018] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0019] The specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the description of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0021] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of description and simplification, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0023] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0024] like Figure 1 and Figure 2 As shown, the backlight module test box includes a housing 11, a voltmeter 12, an ammeter 13, an ohmmeter 14, an alarm device, a controller, and a power module. The voltmeter 12, ammeter 13, ohmmeter 14, alarm device, and power module are respectively housed within the housing 11 and electrically connected to the controller. The surface of the housing 11 is equipped with a first display screen 151 and a second display screen 152. The first display screen 151 displays the values ​​of the voltmeter 12 and ammeter 13, and the second display screen 152 displays the value of the ohmmeter 14. The power module supplies power to the controller, alarm device, and the power module under test. The alarm device is electrically connected to the controller. The controller monitors the values ​​of the voltmeter 12, ammeter 13, and ohmmeter 14 in real time. When the controller detects that the voltmeter 12 is 0 or the ammeter 13 is 0, the controller determines that the backlight module under test is short-circuited or open-circuited, and the alarm device automatically sounds an alarm. The alarm sound can be a buzzer, a voice alarm, or a "beep" sound. In this embodiment, the voltage value of the backlight module test box is 3V~36V; in other embodiments, the voltage value of the backlight module test box can be set within the required range, and is not limited to 3V~36V.

[0025] The backlight module test box of this utility model can monitor and analyze the values ​​of voltmeter 12, ammeter 13 and ohmmeter 14 in real time through the controller. When the backlight module under test has a short circuit, open circuit or damaged thermistor, the alarm device will automatically sound an alarm to prevent defective products from being released. This backlight module test box can realize multi-functional and intelligent testing, eliminating the need for manual testing and adjustment. It is simple to operate, improves work efficiency, and effectively prevents damage to components and product circuits caused by human error.

[0026] Preferably, the backlight module test box includes an automatic adjustment Zener diode and a carbon film resistor. The backlight module test box also includes a power adapter, which is electrically connected to the automatic adjustment Zener diode and the carbon film resistor. The power adapter is used to connect to the backlight module under test to output constant current and constant voltage. The power adapter adopts a constant current and constant voltage automatic output mode. Through the conversion of the power adapter, it can be adapted to different models of backlight modules. The automatic adjustment Zener diode and the carbon film resistor have an automatic power-off mode to protect the circuit safety of the backlight module under test. It can effectively avoid damage to components caused by circuit damage, hot-swapping, incorrect insertion of the positive and negative terminals of the backlight module.

[0027] Preferably, the backlight module test box includes a first indicator light 161, which is electrically connected to the controller. When the controller determines that the backlight module is short-circuited, the first indicator light 161 lights up red.

[0028] Preferably, the backlight module test box also includes a DIP switch 171, which is used to adjust the current of the backlight module under test. The adjustment is made by the DIP switch 171 according to the required current of the backlight module under test.

[0029] Preferably, the backlight module test box further includes a power switch 172, a low current check switch 173, and a short circuit check switch 174. The power switch 172 is used to turn the backlight module test box on or off. When the power switch 172 is turned on, the backlight module test box enters a standby state. When the power switch 172 is turned off, the backlight module test box is turned off. The low current check switch 173 is used to detect the low current of the backlight module under test. After testing the normal current of the backlight module under test, the low current is tested to test whether the current has dispersion. When the short circuit check switch 174 is turned on, the backlight module test box tests the circuit of the backlight module under test to determine whether there is a short circuit in the circuit of the backlight module under test, such as leakage current from the LED strip A&K and short circuit between the iron frame LED.

[0030] Preferably, the backlight module test box also includes a power switch 175, which is used to turn on or off the light strip or light board of the backlight module under test to test the integrity of the LED lights in the light strip or light board. The integrity of the LED lights refers to whether the LED lights themselves are damaged. For example, when the current, voltage, resistance, etc. of the backlight module under test are all normal, but when the backlight module is turned on, one or two LED lights in the light strip or light board do not light up or their brightness is significantly different from that of other LED lights, then the LED light is determined to be damaged.

[0031] Preferably, the backlight module test box also includes a second indicator light 162. When the resistance value of the thermistor of the backlight module under test is not within the set range, the second indicator light 162 lights up, and the alarm device sounds an alarm. In this embodiment, the resistance value of the thermistor at room temperature is 10kΩ, and the resistance value changes with temperature. Therefore, the set range refers to the normal resistance value range of the thermistor of the backlight module under test, that is, the upper and lower limits of the thermistor. Before testing the backlight module, the set value is entered into the backlight module test box. The controller judges the thermistor as OK or NG. If the measured resistance value of the thermistor is not within the set range, the controller judges it as NG, and the resistance value is abnormal. The controller controls the second indicator light 162 to light up, and the alarm device sounds an alarm.

[0032] Preferably, the backlight module test box further includes a display panel 18, which is electrically connected to the controller. The display panel 18 is used to display the cause of the fault of the backlight module under test. The cause of the fault is the specific reason for the fault, such as a short circuit between the LED strip A&K and the iron frame, a short circuit in the specific circuit of the backlight module, or the thermistor value exceeding the standard.

[0033] In another preferred embodiment, the display panel 18 forms an angle with the housing 11, the display panel 18 is in a standing state, and a pivot is provided between the display panel 18 and the housing, so that the display panel 18 can rotate relative to the housing 11, thereby realizing the folding function of the display panel 18.

[0034] Preferably, the backlight module test box is provided with multiple interfaces for connecting various types of adapter lighting fixtures; it can also be provided with multiple buttons, which work in conjunction with the display panel 18 to realize page turning, function selection and function confirmation of the function menu on the display panel 18, making it more intelligent.

[0035] In another preferred embodiment, an AI program is added to the controller to enable human-computer interaction through AI functions, making it more convenient and intelligent. On this basis, an AI voice button is set up to wake up or stop the AI ​​function.

[0036] Therefore, the backlight module test box in this embodiment can test backlight performance and monitor voltage and current. The test motherboard inside the backlight module test box can be pre-set with multiple test programs, so that the test of each backlight module under test can be carried out according to the specific product connection pin definition. The test motherboard is electrically connected to the controller. The test program of the test motherboard can be set as needed, covering NTC, LED, continuity and short circuit tests, etc. It can also combine the latest environmental light sensing detection requirements and programs to realize the functional detection of the light sensor. All of these are achieved by pre-setting the test program of the test motherboard, truly realizing multi-functional testing and intelligence.

[0037] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the appended claims.

Claims

1. A backlight module test box, characterized in that, The utility model relates to a backlight module test box, including box (11), voltmeter (12), ammeter (13), ohmmeter (14), alarm device, controller and power module, voltmeter (12), ammeter (13), ohmmeter (14), alarm device and power module are arranged in box (11) respectively with controller electric connection, the surface of box (11) is equipped with first display screen (151) and second display screen (152), first display screen (151) is used to show the numerical value of voltmeter (12) and ammeter (13), second display screen (152) is used to show the numerical value of ohmmeter (14), power module is used to power supply controller, alarm device and the power module of tested, alarm device with controller electric connection, the controller carries out real -time monitoring to the numerical value of voltmeter (12), ammeter (13) and ohmmeter (14), when the controller detects voltmeter (12) is 0 or ammeter (13) is 0, the controller judges the backlight module of testing short circuit or open circuit, alarm device carries out automatic alarm.

2. The backlight module test cartridge of claim 1, wherein, The backlight module test box is provided with an automatic debugging voltage stabilizing tube and a carbon film resistor, and further comprises a power adapter electrically connected with the automatic debugging voltage stabilizing tube and the carbon film resistor.

3. The backlight module test cartridge of claim 2, wherein, The backlight module test box comprises a first indicator lamp (161) electrically connected with the controller, which is bright red when the controller determines that the backlight module is short-circuited.

4. The backlight module test cartridge of claim 2, wherein, The backlight module test box further comprises a code switch (171) for adjusting the current of the backlight module to be tested.

5. The backlight module test cartridge of any one of claims 1 to 4, wherein, The backlight module test box further comprises a power switch (172), a low-current inspection switch (173) and a short-circuit point inspection switch (174), the power switch (172) is used to turn on or turn off the backlight module test box, the low-current inspection switch (173) is used to detect the low current of the backlight module to be tested, and the short-circuit point inspection switch (174) is used to detect the circuit of the backlight module to be tested when it is turned on.

6. The backlight module test cartridge of claim 5, wherein, The backlight module test box further comprises a lighting switch (175) for turning on or off the light bar or light panel of the backlight module to be tested to test the integrity of the LED lamp of the light bar or light panel.

7. The backlight module test cartridge of claim 1, wherein, The backlight module test box further comprises a second indicator lamp (162) that is bright when the resistance value of the thermistor of the backlight module to be tested is not within the set range, and the alarm device alarms.

8. The backlight module test cartridge of claim 1, wherein, The backlight module test box further comprises a display panel (18) electrically connected with the controller, and the display panel (18) is used for displaying the failure cause of the backlight module under test.

9. The backlight module test cartridge of claim 1, wherein, The voltage value of the backlight module test box is 3V-36V.

Images