CN215813061U - Liquid crystal display module lighting aging test fixture - Google Patents
Liquid crystal display module lighting aging test fixture Download PDFInfo
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- CN215813061U CN215813061U CN202120211774.4U CN202120211774U CN215813061U CN 215813061 U CN215813061 U CN 215813061U CN 202120211774 U CN202120211774 U CN 202120211774U CN 215813061 U CN215813061 U CN 215813061U
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Abstract
The utility model discloses a lighting aging test fixture for a liquid crystal display module, which comprises a power supply device for providing a power supply for the whole fixture and a circuit control device for receiving, processing and outputting data, wherein the circuit control device is electrically connected with the power supply device and comprises a program downloading interface for downloading data, an MCU control circuit for processing data and an MIPI signal circuit for outputting data, and the program downloading interface is electrically connected with the MCU control circuit; the MCU control circuit is electrically connected with the MIPI signal circuit; the power supply device comprises a power supply circuit, a module power supply circuit used for supplying power to a plurality of liquid crystal display modules and a module interface circuit used for connecting the liquid crystal display modules to be detected.
Description
Technical Field
The utility model relates to the technical field of liquid crystal display modules, in particular to a lighting aging test fixture for a liquid crystal display module.
Background
At present, in the industry of liquid crystal display modules, the circuit design and software debugging of a lighting aging test fixture are very complex, a control chip of a hardware circuit basically adopts an ARM + FPGA architecture, the software debugging needs to be divided into two modules for debugging due to different hardware, wherein the development of a bottom layer driving program, the programming of an application layer program and the design of upper computer software are related, and the development, the programming and the debugging need to be carried out by professional technicians, so that the design cycle of the fixture is long, and the cost of manpower and material resources is high.
Meanwhile, the jig manufacturing company cannot design by itself due to different technical fields, and can only purchase the jig from a specially designed company. Most liquid crystal display module products only need to run simple pure color test pictures during lighting aging tests without specific requirements, and all liquid crystal display module circuits can work.
Although some jigs produced by jig companies are low in price, the jig cannot support the LCM and the OLED at the same time, one jig can only light one LCM, and the power-on time sequence mode and the power supply voltage of the jig cannot be modified.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defects in the prior art, and provides the liquid crystal display module lighting aging test jig which can simultaneously test a plurality of liquid crystal display modules and a plurality of liquid crystal display modules, automatically refreshes pictures, screens out unqualified products, has strong universality, is favorable for reducing the purchase cost of the jig, can reduce the content and time of program debugging and reduces the labor cost.
In order to achieve the purpose, the utility model provides a lighting aging test fixture for a liquid crystal display module, which comprises a power supply device for providing a power supply for the whole fixture and a circuit control device for receiving, processing and outputting data, wherein the circuit control device is electrically connected with the power supply device and comprises a program downloading interface for downloading data, an MCU control circuit for processing data and an MIPI signal circuit for outputting data, and the program downloading interface is electrically connected with the MCU control circuit; the MCU control circuit is electrically connected with the MIPI signal circuit; the power supply device comprises a power supply circuit, a module power supply circuit and a module interface circuit, wherein the module power supply circuit is used for supplying power to a plurality of liquid crystal display modules, and the module interface circuit is used for being connected with the plurality of liquid crystal display modules to be detected; the module power supply circuit is electrically connected with the module interface circuit; the power supply circuit is electrically connected with the MCU control circuit; the MIPI signal circuit is in signal connection with the module power supply circuit.
Preferably, a surge protection circuit for preventing damage of a liquid crystal display module caused by a surge is arranged between the module power supply circuit and the module interface circuit.
Preferably, an ESD prevention circuit for preventing damage of the liquid crystal display module due to static electricity is installed between the MIPI signal circuit and the module power supply circuit.
Preferably, the MCU control circuit is connected with the MIPI signal circuit through an SPI bus.
Preferably, the MIPI signal circuit is connected to the module power supply circuit through an MIPI signal line, and is configured to control voltage, current and power-on timing that the module power supply circuit inputs to the module interface circuit.
Preferably, the module interface circuit comprises a plurality of connectors, and the connectors are connected with the liquid crystal display module through FPC patch cords.
Preferably, a control chip of the MCU control circuit is C8051F340, a control chip of the MIPI signal circuit is SSD2828T, and a voltage conversion chip of the power supply circuit comprises TPS5430, SGM2019-3.3/1.8/1.2, TPS54531, RT4722, LM36923 and AAT75 7517B.
Preferably, the module interface circuit further comprises a plurality of connection indicator lights
Preferably, the power supply device further comprises a power switch key and a power indicator lamp.
Preferably, the module power supply circuit further comprises a test start button.
Compared with the prior art, the utility model has the beneficial effects that:
1. the liquid crystal display module testing device is provided with the module power supply circuit for supplying power to the liquid crystal display modules and the module interface circuit for connecting the liquid crystal display modules to be tested, so that the liquid crystal display modules can be tested simultaneously, the testing time can be saved, and the testing efficiency can be improved.
2. The module interface circuit can be compatible with various liquid crystal display modules, including an LCM module and an OLED module, and the module power supply circuit provides voltage, current and power-on time sequence for the liquid crystal display module to be detected, so that the liquid crystal display module to be detected automatically refreshes pictures for lighting aging test of the liquid crystal display module, unqualified products are screened out, the universality is strong, and the tool purchase cost is favorably reduced.
3. The control chip of the MCU control circuit is C8051F340, only one single chip is used, the MCU control circuit is connected with the MIPI signal circuit through an SPI bus, only one SPI interface is used, an ARM + FPGA framework is not needed, the content and time of program debugging can be reduced, and the labor cost is reduced.
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 description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a circuit structure diagram of a lighting aging test fixture for a liquid crystal display module according to the present invention;
FIG. 2 is a top view of a lighting aging test fixture for a liquid crystal display module according to the present invention.
The figure includes:
the device comprises a 2-power supply device, a 3-circuit control device, a 31-program downloading interface, a 32-MCU control circuit, a 33-MIPI signal circuit, a 21-power supply circuit, a 22-module power supply circuit, a 23-module interface circuit, a 24-surge prevention circuit, a 36-ESD prevention circuit, a 34-SPI bus, a 35-MIPI signal line, a 231-connector, a 232-connection indicator lamp, a 26-power switch key, a 27-power indicator lamp and a 221-test start button.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are one embodiment of the present invention, and not all embodiments of the present invention. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without any creative work belong to the protection scope of the present invention.
Referring to fig. 1 and 2, the present invention provides a lighting aging test fixture for a liquid crystal display module, including a power supply device 2 for providing a power supply for the whole fixture and a circuit control device 3 for receiving, processing and outputting data, wherein the circuit control device 3 is electrically connected to the power supply device 2, specifically, the power supply device 2 provides a power supply for the circuit control device 3, and the circuit control device 3 controls a voltage, a current, a power-on timing sequence and a driving program of the power supply device 2.
The circuit control device 3 comprises a program downloading interface 31 for downloading data, an MCU control circuit 32 for processing data and an MIPI signal circuit 33 for outputting data, wherein the program downloading interface 31 is electrically connected with the MCU control circuit 32; the MCU control circuit 32 is electrically connected with the MIPI signal circuit 33; specifically, the external device downloads or inputs an external program into the MCU control circuit 32 through the program download interface 31, the MCU control circuit 32 outputs a control signal through the MIPI signal circuit 33, and the control signal is output to the module power supply circuit 22.
The power supply device 2 comprises a power supply circuit 21, a module power supply circuit 22 for supplying power to a plurality of liquid crystal display modules and a module interface circuit 23 for connecting the plurality of liquid crystal display modules to be detected, wherein the power supply circuit 21 is electrically connected with the module power supply circuit 22; the module power supply circuit 22 is electrically connected with the module interface circuit 23; the power supply circuit 21 is electrically connected with the MCU control circuit 32; the MIPI signal circuit 33 is in signal connection with the module power supply circuit 22, and an output signal of the MIPI signal circuit 33 is used for controlling the voltage, the current and the power-on timing sequence of the module power supply circuit 22 input to the module interface circuit 23.
In this embodiment, the module power supply circuit 22 is four independent power supply circuits for the liquid crystal display modules, and can support lighting of the LCM module and the OLED module, and can light different models of modules simultaneously, the module interface circuit 23 is also an interface circuit for four independent power supply circuits for the liquid crystal display modules, and the module power supply circuit 22 and the module interface circuit 23 can be used to test a plurality of liquid crystal display modules simultaneously, so that the test time can be saved, and the test efficiency can be improved.
Further, as shown in fig. 2, the program download interface 31 is HEADE5 × 2, which is a jig program burning interface.
The MCU control circuit 32 sends an initialization signal and a power supply starting signal of the liquid crystal display module according to the program setting; the MIPI signal circuit 33 receives the speed, the resolution and other parameters of the liquid crystal display module which is initially configured through the SPI bus 34; the module power supply circuit 22 generates various paths of voltage and current required by the liquid crystal display module by different power chips, and is controlled by signals output by the MIPI signal circuit 33.
The power supply circuit 21 reduces the externally input 10V-35V direct current voltage to 5V by using a voltage conversion IC, the direct current 5V voltage is converted into a voltage value required by the circuit through each chip, and the voltage conversion chip of the power supply circuit 21 comprises TPS5430, SGM2019-3.3/1.8/1.2, TPS54531, RT4722, LM36923 and AAT 7517B.
As shown in fig. 1, an anti-surge circuit 24 for preventing damage to the lcd module caused by surge is installed between the module power supply circuit 22 and the module interface circuit 23, and specifically, a TVS tube is connected to the power line.
As shown in fig. 1, an ESD protection circuit 25 for preventing static electricity from damaging the liquid crystal display module is disposed between the MIPI signal circuit 33 and the module power supply circuit 22, and specifically, an ESD tube is connected to a signal line.
As shown in fig. 1, the MCU control circuit 32 is connected to the MIPI signal circuit 33 through the SPI bus 34, the MCU control circuit 32 sends the initialization signal and the power start signal of the liquid crystal display module to the MIPI signal circuit 33 through the SPI bus 34 according to the program setting, the control chip of the MCU control circuit 32 is C8051F340, the control chip of the MIPI signal circuit 33 is SSD28 2828T, only one single chip is used, only one SPI interface is used, an ARM + FPGA architecture is not required, the contents and time of program debugging can be reduced, and the labor cost is reduced.
The external program is input into the MCU control circuit 32 through the program download interface 31, and the external program controls the on and off of the voltage, the current and the power-on time sequence of the liquid crystal display module to be detected through the compiling and debugging of the MCU control circuit 32.
The MCU control circuit 32 coordinates the ordered work of each circuit through the operation program, and the MCU control circuit 32 communicates with the MIPI signal circuit 33 through the SPI bus 34 to control parameters such as the rate of MIPI.
The MIPI signal circuit 33 is connected to the module power supply circuit 22 through a MIPI signal line 35, and is used to control the voltage, current and power-on sequence of the module power supply circuit 22 input to the module interface circuit 23.
The MCU control circuit 32 initializes a driving command to the MIPI signal circuit 33 through the SPI bus 34, the MIPI signal circuit 33 sends a signal to the module power supply circuit 22 through the MIPI signal line 35, the liquid crystal display module to be detected can display a picture, and the liquid crystal display module to be detected can display the picture.
The module interface circuit 23 comprises a plurality of connectors 231, the connectors 231 are connected with the liquid crystal display modules through FPC (flexible printed circuit) transfer lines, the module interface circuit 23 can simultaneously test four liquid crystal display modules, 5 pure-color pictures can be automatically refreshed and displayed, namely black, white, red, green and blue, the module interface circuit 23 outputs power-on and power-off time sequences of the liquid crystal display modules according to programs, and the voltage and current of the liquid crystal display modules are adjusted to meet the electrical requirements of different liquid crystal display modules.
The module interface circuit 23 further includes a plurality of connection indicator lights 232 for displaying the connection status of the FPC patch cord with the liquid crystal display module.
The power supply device 2 further comprises a power switch key 26 and a power indicator lamp 27, wherein the power switch key 26 is used for controlling the input of the main power supply, and the power indicator lamp 27 is used for indicating the input state of the main power supply.
The module power supply circuit 22 further comprises a test start button 221, and the test start button 221 is used for starting and ending the liquid crystal display module to be detected.
The use process of the test fixture comprises the following steps: firstly, pressing a power switch key 26, turning on the power indicator lamp 27, and controlling the test fixture to carry out initialization detection by the MCU control circuit 32; secondly, taking out four liquid crystal display modules to be tested, and connecting the liquid crystal display modules with a connector 231 of the module interface circuit 23 through FPC patch cords; thirdly, pressing a test start button 221, and starting the automatic lighting aging test of the liquid crystal display module to be detected; and finally, after the lighting aging test is finished, taking down the liquid crystal display module and placing the liquid crystal display module in a test finishing area.
In conclusion, the beneficial effects of the utility model are as follows:
the liquid crystal display module testing device is provided with the module power supply circuit 22 for supplying power to a plurality of liquid crystal display modules and the module interface circuit 23 for connecting the liquid crystal display modules to be tested, so that the liquid crystal display modules can be tested simultaneously, the testing time can be saved, and the testing efficiency can be improved; the module interface circuit 23 can be compatible with various liquid crystal display modules, including an LCM module and an OLED module, the module power supply circuit 22 provides voltage, current and power-on time sequence for the liquid crystal display module to be detected, so that the liquid crystal display module to be detected automatically refreshes pictures for lighting aging test of the liquid crystal display module, unqualified products are screened out, the universality is strong, and the tool purchase cost is reduced; the control chip of the MCU control circuit 32 is C8051F340, only one single chip is used, the MCU control circuit 32 is connected with the MIPI signal circuit 33 through the SPI bus 34, only one SPI interface is used, an ARM + FPGA framework is not needed, the content and time of program debugging can be reduced, and the labor cost is reduced.
Claims (10)
1. The liquid crystal display module lighting aging test fixture is characterized by comprising a power supply device (2) for providing a power supply for the whole fixture and a circuit control device (3) for receiving, processing and outputting data, wherein the circuit control device (3) is electrically connected with the power supply device (2), the circuit control device (3) comprises a program downloading interface (31) for downloading data, an MCU control circuit (32) for processing data and an MIPI signal circuit (33) for outputting data, and the program downloading interface (31) is electrically connected with the MCU control circuit (32); the MCU control circuit (32) is electrically connected with the MIPI signal circuit (33); the power supply device (2) comprises a power supply circuit (21), a module power supply circuit (22) for supplying power to the liquid crystal display modules and a module interface circuit (23) for connecting the liquid crystal display modules to be detected, wherein the power supply circuit (21) is electrically connected with the module power supply circuit (22); the module power supply circuit (22) is electrically connected with the module interface circuit (23); the power supply circuit (21) is electrically connected with the MCU control circuit (32); the MIPI signal circuit (33) is in signal connection with the module power supply circuit (22).
2. The lighting aging test fixture for liquid crystal display modules as claimed in claim 1, wherein a surge protection circuit (24) for preventing damage to the liquid crystal display modules from surges is installed between the module power supply circuit (22) and the module interface circuit (23).
3. The lighting aging test fixture for liquid crystal display modules as claimed in claim 1, wherein an ESD protection circuit (36) for preventing static electricity from damaging the liquid crystal display modules is installed between the MIPI signal circuit (33) and the module power supply circuit (22).
4. The lighting aging test fixture for the liquid crystal display module according to claim 1, wherein the MCU control circuit (32) is connected with the MIPI signal circuit (33) through an SPI bus (34).
5. The lighting aging test fixture for the liquid crystal display module set according to claim 1, wherein the MIPI signal circuit (33) is connected to the module power supply circuit (22) through a MIPI signal line (35) for controlling the voltage, current and power-on sequence of the module power supply circuit (22) input to the module interface circuit (23).
6. The lighting aging test fixture for liquid crystal display modules as claimed in claim 1, wherein the module interface circuit (23) comprises a plurality of connectors (231), and the connectors (231) are connected with the liquid crystal display modules through FPC patch cords.
7. The lighting and aging test fixture for the liquid crystal display module according to claim 1, wherein a control chip of the MCU control circuit (32) is C8051F340, a control chip of the MIPI signal circuit (33) is SSD2828T, and a voltage conversion chip of the power supply circuit (21) comprises TPS5430, SGM2019-3.3/1.8/1.2, TPS54531, RT4722, LM36923 and AAT 7517B.
8. The lighting aging test fixture for liquid crystal display modules as claimed in claim 1, wherein the module interface circuit (23) further comprises a plurality of connection indicator lamps (232).
9. The lighting aging test fixture for liquid crystal display modules as claimed in claim 1, wherein the power supply device (2) further comprises a power switch button (26) and a power indicator (27).
10. The tool for testing the lighting aging of the liquid crystal display module set according to claim 1, wherein the module power supply circuit (22) further comprises a test start button (221).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211774.4U CN215813061U (en) | 2021-01-26 | 2021-01-26 | Liquid crystal display module lighting aging test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120211774.4U CN215813061U (en) | 2021-01-26 | 2021-01-26 | Liquid crystal display module lighting aging test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215813061U true CN215813061U (en) | 2022-02-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120211774.4U Active CN215813061U (en) | 2021-01-26 | 2021-01-26 | Liquid crystal display module lighting aging test fixture |
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|---|---|
| CN (1) | CN215813061U (en) |
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2021
- 2021-01-26 CN CN202120211774.4U patent/CN215813061U/en active Active
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