CN209804250U - Interface expansion switching test board - Google Patents
Interface expansion switching test board Download PDFInfo
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- CN209804250U CN209804250U CN201920793935.8U CN201920793935U CN209804250U CN 209804250 U CN209804250 U CN 209804250U CN 201920793935 U CN201920793935 U CN 201920793935U CN 209804250 U CN209804250 U CN 209804250U
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Abstract
The utility model discloses an interface is extended and is surveyed board is surveyed in switching mainly connects spigot J1, output to connect spigot, power drive circuit and LED drive circuit by the input and constitutes. The output plug terminal comprises a display plug terminal J2, a touch plug terminal T1 and an SDO plug terminal. The utility model discloses increase and establish between TFT display module assembly that awaits measuring and external test equipment to providing being connected between each port of the TFT display module assembly that awaits measuring and the external test equipment, need not like this additionally to pull out the test point on the TFT display module assembly that awaits measuring, just can test each port of the TFT display module assembly that awaits measuring, thereby reach the effect of convenient test and promotion security and work production efficiency.
Description
Technical Field
The utility model relates to a TFT shows technical field, concretely relates to adapter test panel is extended to interface.
Background
With the development of TFT display technology, the size of the TFT display module is getting larger and larger, and the TFT display module is widely applied to mobile terminals, industries, vehicles, and other devices. In the process of manufacturing and quality testing of the TFT display module, the TFT display module to be tested needs to be connected to an external test device to test the voltage or current of the port (such as AVDD, VGH, VGL, VCOM, VCC, etc.) of the TFT display module to be tested. However, due to the size limitation of the TFT display module, in order to test the above data, a special test point must be pulled out from the Flexible Printed Circuit (FPC) of the TFT display module to be tested for testing. Therefore, not only are designers spend more effort to design the pulling-out of the test points, but also spend more time to consider the reasonability of the performance and the structure, even if the test points are pulled out, jumper wires are additionally welded to carry out the test, the process is complicated, short circuits are possibly caused, the whole module is damaged, the loss is not compensated, one more step is added, one more error place is possibly added, and the investment and the income are not in direct proportion.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve is the current complicated loaded down with trivial details problem of voltage or current test to the port of TFT display module assembly, provides an interface and extends the switching and survey test panel.
In order to solve the above problems, the utility model discloses a realize through following technical scheme:
An interface expansion transfer test board mainly comprises an input plug terminal J1, a display plug terminal J2, a power supply drive circuit and an LED drive circuit; the VCC ports of the input plug terminal J1 are divided into two paths, one path is directly connected with the VCC port of the display plug terminal J2, the other path is connected with the input port of the power supply driving circuit, and the AVDD, VGH, VGL and VCOM output ends of the power supply driving circuit are respectively connected with the AVDD, VGH, VGL and VCOM ports of the display plug terminal J2; the LEDA port of the input plug-in terminal J1 is connected with the input end of the LED drive circuit, and the A and K output ends of the LED drive circuit are respectively connected with the A and K ports of the display plug-in terminal J2; R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the input interface J1 are respectively connected with R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the display interface J2 correspondingly.
The TFT display module interface expansion switching test board further comprises a touch connection plug end T1, and XR, YD, XL and YU ports of the touch connection plug end T1 are correspondingly connected with XR, YD, XL and YU ports of an input connection plug end J1 respectively.
The TFT display module interface expansion switching test board further comprises an SDO plug-in terminal which is directly connected with an SDO port of the input plug-in terminal J1.
Compared with the prior art, the utility model discloses increase and establish between the TFT display module assembly that awaits measuring and external test equipment to be connected between each port and the external test equipment of the TFT display module assembly that awaits measuring, need not like this additionally to pull out the test point on the TFT display module assembly that awaits measuring, just can test each port of the TFT display module assembly that awaits measuring, thereby reach the effect of convenient test and promotion security and work production efficiency.
drawings
Fig. 1 is a schematic circuit diagram of an interface expansion transfer test board.
Fig. 2 is a schematic diagram of a power driving circuit.
fig. 3 is a schematic diagram of an LED driving circuit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings.
an interface expansion transfer test board is mainly composed of an input plug terminal J1, an output plug terminal, a power supply driving circuit and an LED driving circuit, as shown in figure 1. When the test device is used, the input plug-in end J1 is connected with external test equipment, and the output plug-in end is connected with the TFT display module to be tested.
in FIG. 1, the direct connection lines between the ports (i.e., VCC, R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN, XR, YD, XL, YU, and SDO) corresponding to the input and output connectors are not drawn directly for the purpose of making the lines in the figure clearer, but do not indicate that the connection between these ports is not present.
In the present invention, when the TFT display module to be tested is a non-touch display module, the output plug only includes the display plug J2; and when the TFT display module to be tested is a touch display module, the output plug terminal comprises a display plug terminal J2 and a touch plug terminal T1. In addition, the output socket terminal may further include 1 SDO socket terminal.
The VCC ports of the input plug terminal J1 are divided into two paths, one path is directly connected with the VCC port of the display plug terminal J2, the other path is connected with the input port of the power supply driving circuit, and the AVDD, VGH, VGL and VCOM output ends of the power supply driving circuit are respectively connected with the AVDD, VGH, VGL and VCOM ports of the display plug terminal J2. The power driving circuit is shown in fig. 2, and mainly functions to convert the power voltage VCC from the input terminal J1 into different power voltages AVDD, VGH, VGL, and VCOM to be sent to the display terminal J2 by using the panel power chip LP6285 and its peripheral circuits.
The LEDA port of the input connection plug-in terminal J1 is connected with the input end of the LED drive circuit, and the A and K output ends of the LED drive circuit are respectively connected with the A and K ports of the display connection plug-in terminal J2. The schematic diagram of the LED driving circuit is shown in fig. 3, and the LED driving circuit mainly functions to convert an LEDA signal sent from the input terminal J1 into an a signal and a K signal by using the LED driving chip LP3380 and its peripheral circuits, and sends the a signal and the K signal to the display terminal J2.
R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the input interface J1 are respectively connected with R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the display interface J2 correspondingly.
The XR, YD, XL and YU ports of the input plug-in terminal J1 are correspondingly connected with the XR, YD, XL and YU ports of the touch plug-in terminal T1.
The SDO port of the input plug terminal J1 is directly connected with the SDO plug terminal.
It should be noted that, although the above-mentioned embodiments of the present invention are illustrative, the present invention is not limited thereto, and therefore, the present invention is not limited to the above-mentioned embodiments. Other embodiments, which can be made by those skilled in the art in light of the teachings of the present invention, are considered to be within the scope of the present invention without departing from the principles thereof.
Claims (3)
1. An interface expansion transfer test board is characterized by mainly comprising an input plug terminal J1, a display plug terminal J2, a power supply driving circuit and an LED driving circuit;
The VCC ports of the input plug terminal J1 are divided into two paths, one path is directly connected with the VCC port of the display plug terminal J2, the other path is connected with the input port of the power supply driving circuit, and the AVDD, VGH, VGL and VCOM output ends of the power supply driving circuit are respectively connected with the AVDD, VGH, VGL and VCOM ports of the display plug terminal J2;
The LEDA port of the input plug-in terminal J1 is connected with the input end of the LED drive circuit, and the A and K output ends of the LED drive circuit are respectively connected with the A and K ports of the display plug-in terminal J2;
R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the input interface J1 are respectively connected with R0-R7, G0-G7, B0-B7, SCLK, DCLK, RESET, HSYNC, VSYNC, CS, SDI and DEN ports of the display interface J2 correspondingly.
2. The board of claim 1, further comprising a touch pad connector T1, wherein the XR, YD, XL and YU ports of the touch pad connector T1 are connected to the XR, YD, XL and YU ports of the input connector J1 respectively.
3. The test board of claim 1, further comprising an SDO connector directly connected to the SDO port of the input connector J1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793935.8U CN209804250U (en) | 2019-05-29 | 2019-05-29 | Interface expansion switching test board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920793935.8U CN209804250U (en) | 2019-05-29 | 2019-05-29 | Interface expansion switching test board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209804250U true CN209804250U (en) | 2019-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920793935.8U Active CN209804250U (en) | 2019-05-29 | 2019-05-29 | Interface expansion switching test board |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209804250U (en) |
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2019
- 2019-05-29 CN CN201920793935.8U patent/CN209804250U/en active Active
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