CN203870352U - Display module testing and displaying system - Google Patents

Abstract

The utility model belongs to the field of display technology, in particular to a display module testing and display system. The system does not need to be restarted when the display module is replaced, and it includes: a storage unit, which is used to store data information; a control unit electrically connected to the storage unit, which is used to receive the data information stored by the storage unit and convert it Converted to an image control signal; an interface unit electrically connected to the control unit, which is used to connect the display module to be tested or displayed, and the interface unit is also used to receive the image control signal of the control unit and convert it into a display signal; a control unit electrically connected to the control unit, which is used to receive a user’s control command and transmit the control command to the control unit; and, the control unit is also used to receive the control signal, and keep In the running state, the interface unit is controlled to interrupt or resume the output of the display signal according to the control signal.

Description

A display module test and display system

technical field

The utility model belongs to the field of display technology, in particular to a display module test

and display system.

Background technique

In the production process of the display panel, the performance of the display module is generally tested after the display module (including the array substrate, color filter substrate, liquid crystal layer, etc.) is prepared, but before the corresponding drive circuit is connected to form the display panel. In addition, in order to occupy a favorable market share, display modules often appear in various exhibition venues, which requires a system that can provide a large number of pictures for testing or display for display modules, and also requires the The system is easy to operate and easy to carry.

The existing display module testing system can provide display signals for the display module, thereby driving the display module to display.

However, when the tested display module is to be replaced, the display module test system must be turned off first, then the display module can be removed from the display module test system and a new display module installed, and finally restarted Turn on the display module test system, because when the display module continues to output display signals, loading and unloading the display module will cause damage to the equipment; and the above problems lead to troublesome and time-consuming operations for replacing the display module.

Utility model content

The technical problem to be solved by the utility model is to provide a display module test and display system that does not need to be restarted when the display module is replaced, aiming at the problem that the existing display module test and display system needs to be restarted when the display module is replaced. , easy to operate and less time-consuming.

The technical solution adopted to solve the technical problem of the utility model is a display module testing and display system, which includes:

a storage unit for storing data information;

a control unit electrically connected to the storage unit, which is used to receive the data information stored in the storage unit and convert it into an image control signal;

An interface unit electrically connected to the control unit, which is used to connect the display module to be tested or displayed, and the interface unit is also used to receive the image control signal of the control unit and convert it into a display signal;

a manipulation unit electrically connected to the control unit, configured to receive a manipulation instruction from a user and transmit the manipulation instruction to the control unit;

and,

The control unit is further configured to receive the control signal, and control the interface unit to interrupt or resume the output of the display signal according to the control signal in the running state.

Preferably, the interface unit is also used to provide the display module with a backlight required for display.

Preferably, the interface unit includes: a MIPI bridge board electrically connected to the control unit, which is used to receive the image control signal of the control unit and convert it into a MIPI signal; a connection board electrically connected to the MIPI bridge board, which uses In order to connect the display module, the connection board is also used to send the MIPI signal from the MIPI bridge board to the display module, and provide the display module with backlight required for display.

Preferably, the MIPI bridge board includes: a bridge chip, which is used to convert the image control signal into a MIPI signal, and is electrically connected with the signal input/output board; a signal input/output board, which is connected with the bridge chip, the control unit, The connection board is electrically connected, and is used for forwarding the image control signal from the control unit to the bridge chip, and outputting the MIPI signal from the bridge chip to the connection board.

Preferably, the MIPI bridge board further includes: a clock board electrically connected to the bridge chip for synchronization; a power board electrically connected to the bridge chip, which is used to supply power to the bridge chip.

Preferably, the connecting board includes: a connector electrically connected to the MIPI bridge board, which is used to forward the MIPI signal from the MIPI bridge board to the display module; electrically connected to the connector A backlight module is used to provide the display module with backlight required for display; the backlight module includes a driver chip electrically connected to the connector and at least one light source electrically connected to the driver chip.

Preferably, the MIPI bridge board is a MIPI bridge board with a bandwidth of at least 1 Gbps and including at least 4 sets of channels.

Preferably, the storage unit is electrically connected to the control unit through an interface; or the storage unit is integrated with the control unit.

Preferably, the control unit is a processor with a main frequency above 1GHz.

In the display module test and display system of the utility model, the control unit can send a control command to the control unit, so that the interface unit interrupts the output of the display signal (the control unit still keeps running), so that the system can be operated without restarting. Simply replace the display module directly, simplifying the operation and saving time.

Description of drawings

Fig. 1 is the structural block diagram of display module test and display system in the utility model embodiment 1;

In the figure: 10-control unit; 11-terminal interface; 12-RS232 serial port; 13-USB interface; 14-ARM A8 processor; 20-storage unit; 30-control unit; 40-interface unit; 41-MIPI bridge board 411-signal input/output board; 412-bridge chip; 413-clock board; 414-power board; 42-connection board; 421-backlight module; 422-connector; 50-display module to be tested or displayed.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the display module testing and display system of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

A display module testing and display system, comprising:

a storage unit for storing data information;

a control unit electrically connected to the storage unit, which is used to receive the data information stored in the storage unit and convert it into an image control signal;

An interface unit electrically connected to the control unit, which is used to connect the display module to be tested or displayed, and the interface unit is also used to receive the image control signal of the control unit and convert it into a display signal;

a manipulation unit electrically connected to the control unit, configured to receive a manipulation instruction from a user and transmit the manipulation instruction to the control unit;

and,

The control unit is further configured to receive the control signal, and control the interface unit to interrupt or resume the output of the display signal according to the control signal in the running state.

Specifically, as shown in FIG. 1 , the display module testing and display system of this embodiment includes a control unit 10 , a storage unit 20 , a manipulation unit 30 and an interface unit 40 . The control unit 10 is electrically connected to the storage unit 20 , the manipulation unit 30 and the interface unit 40 respectively. The storage unit 20 is used to store data information (including test programs and image information, etc.) used for testing and demonstration; the manipulation unit 30 is used to provide a man-machine interface so that the user can send manipulation instructions to the control unit; the control unit 10 is used to The image information stored in the storage unit 20 is converted into an image control signal (in this embodiment, the RGB signal is taken as an example, of course, it can also be a signal in other forms such as RGBW), and the RGB signal is sent to the interface unit 40; at the same time, the control unit When 10 receives a control signal from the control unit 30, it can also control the interface unit 40 to interrupt the output of the signal in the state of keeping running. The interface unit 40 is used to connect the display module 50 to be tested or displayed, and convert the above-mentioned RGB signal (image control signal) into a display signal (such as MIPI signal, this In the embodiment, take this as an example), and then use the MIPI (Mobile Industry Processor Interface, mobile industry processor interface) signal to control the display module to display. Among them, the display module 50 to be tested or displayed may be a high-resolution display module for testing, displaying and promoting, such as a small-sized display module with a resolution of HD720 (720×1280) and FHD (1200×1920). Group, especially suitable for liquid crystal display modules such as mobile phones.

In the display module testing and display system of this embodiment, the control unit 30 can send a control command to the control unit 10, so that the interface unit 40 interrupts the output of the MIPI signal (but the control unit 10 still keeps running), so that The display module 50 can be replaced directly without restarting, which simplifies the operation and saves time.

In this embodiment, in order to obtain faster processing speed and fluent image test or display effect, the control unit is preferably a processor with a main frequency above 1GHz, such as a reduced instruction set microprocessor, more preferably an ARM A8 processor (ARM A8 platform chip, such as Cortext-A8 core board), embedded Linux system or Android system (preferably Linux system), the main frequency of Cortext-A8 is 1GHz. Compared with the display module test system in the prior art, the ARM architecture processor has its own development and debugging system, which makes the display module test and display system more powerful and easier to develop. The cost is also lower.

Preferably, the interface unit 40 can also provide the display module with backlight required for display.

Wherein, the interface unit 40 includes a MIPI bridge board 41 and a connection board 42 electrically connected. The control unit 10 is provided with an RGB signal output interface (not shown in FIG. 1 ), and the MIPI bridge board 41 is electrically connected to the RGB signal output interface for converting the RGB signal into a MIPI signal and outputting it to the connection board 42; the connection board 42 Then it is used to connect with the display module 50 to be tested or displayed, and output the MIPI signal to the display module 50, that is, the RGB signal output interface is used for testing and displaying with the outside through the MIPI bridge board 41 and the connecting board 42 And the RGB standard interface for connecting high-resolution display modules. Meanwhile, the connection board 42 is also used to provide a backlight for the display module 50 .

Preferably, the MIPI bridge board includes at least 4 groups of channels, and the maximum bandwidth of each channel is at least up to 1Gbps (that is, the highest data transmission speed of each channel is at least 1Gbps), supports smooth operation of 3D graphics, and can support HD720 and FHD resolution, and supports a large number of pictures and 1080P video playback. In this embodiment, the signals output by the RGB signal output interface include color signals in multiple modes such as black, white, red, green, blue, grayscale, and color. The 4 data channels in the MIPI bridge board 41 share a set of clock lines, that is to say, only 10 lines are required for 4 channels. For the resolution of HD1080P, the required bandwidth is: 1920×1080×60 frames×24bit=3Gbps, and the 4 channels of the MIPI bridge board 41 can meet the requirement. The display module test and display system in this embodiment uses a low-cost, high-configuration processor developed based on ARM (Cortext-A8), combined with a 4-channel MIPI bridge board, to form a high-resolution display module The test and display system can realize the test of small size MIPI interface HD720 and higher resolution FHD liquid crystal display modules, and is small in size, easy to carry and low in cost.

Specifically, as shown in FIG. 1 , the MIPI bridge board 41 includes four parts, namely: a signal input/output board 411 , a bridge chip 412 , a clock board 413 and a power board 414 . Wherein, bridge chip 412 is electrically connected with signal input/output board 411, clock board 413 and power supply board 414 respectively, and bridge chip 412 is used for converting RGB signal into MIPI signal, is provided with RGB signal receiving port in signal input/output board 411 And MIPI signal sending port, RGB signal receiving port is used for being connected with the RGB signal output interface of control unit 10, after receiving RGB signal, signal input/output board 411 transmits RGB signal to bridge chip 412, and receives by bridge chip 412 converts the MIPI signal, and the MIPI signal sending port is used to connect with the conversion board 42 to transmit the RGB signal. Wherein, bridge chip 412 is preferably SSD2828 chip, as the control core of interface unit 40, is used for converting 24-bit low-speed RGB signals into high-speed MIPI4 channel signals; power supply board 414 provides voltage for bridge chip 412, and provides voltage for display module The group provides and converts the required analog voltage VCC (2.8V), digital voltage IOVCC (1.8V) voltage and zero voltage reference potential (that is, commonly known as "ground"); the clock board 413 is used to make the control unit and the interface unit Clock synchronization.

The connecting board 42 is used for providing MIPI signal and backlight for the display module 50 to be tested or displayed. Specifically, the connection board 42 is provided with a connector 422 and a backlight module 421. The backlight module 421 includes a driver chip and a light source (such as an LED lamp). The driver chip provides a constant current for the LED lamp. The display module 50 provides a backlight with uniform brightness. The connector 422 is used to connect with the MIPI bridge board 41 (specifically, the MIPI signal sending port of the signal input/output board 411), and transmit the MIPI signal to the display module 50 to be tested or displayed. Meanwhile, the connector 422 is also connected to the backlight Module 421 is connected. Wherein, when there are multiple backlight modules 421, the multiple backlight modules jointly provide backlight. The driver chip in the backlight module 421 can be an RT9285B chip, with a constant current output of 20mA to drive the LED light used as the backlight; the connector 422 can be an AXE53124 chip.

As shown in FIG. 1 , the control unit 30 may include a keyboard, which is used to realize key functions and provide a man-machine information exchange interface. Of course, it is also used to generate manipulation instructions to interrupt the display module 50 during testing or demonstration. The output of the display signal of the display module 50 (that is, the output of the interrupt interface unit 40 ).

In addition, it can be seen from FIG. 1 that the control unit 10 can also be provided with a USB interface (such as a Mini USB interface, which realizes the communication protocol of USB2.0). for other control operations on the system. The RS232 serial port can also be arranged in the control unit 10 to realize the RS232 serial port protocol, which is used to write the compiled program (such as the kernel of the Linux system or the kernel of the Android system compiled by a PC, and the test programs of different test contents) into into the storage unit 20 (of course, the above storage information can also be written into the storage chip that comes with the control unit), so as to replace the test or display program according to the product test or display needs, and expand the versatility of the test and display system; The RS232 serial port can also be connected to monitoring software, such as a super terminal with monitoring function, which can monitor the operation of Cortext-A8 in real time, and find out the abnormalities in the system operation in time to take corresponding measures to avoid the failure of the test and display system itself Caused by poor testing or exhibiting failures. The control unit 10 can also be provided with a terminal interface 11 for connecting with a terminal device such as a computer, so as to perform further control operations on the system (such as system upgrade, fault repair) and the like.

Among them, the storage unit 20 is preferably a large-capacity SD card, which is used to store external large-capacity color pictures, to meet the display requirements of display modules with MIPI interfaces of various resolutions, and to meet the promotion of display modules in planning and market.

The specific process of using the display module testing and display system to test or display the display module is as follows:

S1. Connect the display module testing and display system to the display module 50, and test or display the display module 50.

In this step, the display module is connected to the connection board 42 of the display module testing and display system. Afterwards, start the power supply of the whole system, provide the power supply of DC 5V, as the Linux system in the ARM processor of control unit 10 can transfer into the boot loader file, start the Linux system automatically; At the same time, the MIPI bridge board 42 is also initialized and Enter normal operation, RGB signal is converted to MIPI signal. After the Linux system starts, the initialization code will be downloaded to the register in the driver chip (DRIVER IC) of the display module connected to the connection board 42 through the MIPI bridge board 41 to provide MIPI signals; meanwhile, the connection board 42 also provides corresponding The backlight, that is, the MIPI bridge board 41 and the connection board 42 provide MIPI signals and backlight for the display module at the same time, the MIPI signal provides display signals for the display module, and the backlight is used to light up the display module.

S2. Send a manipulation instruction to the control unit 10 through the manipulation unit 30, and the control unit 10 controls the interface unit 40 to interrupt the output of the display signal according to the manipulation instruction while the control unit 10 is running.

In this step, a manipulation instruction is sent to the control unit 10 through keys on the keyboard (manipulation unit 30 ), thereby interrupting the output of the MIPI signal (display signal) of the interface unit 40 . Among them, there are various methods for interrupting the MIPI signal output. For example, the control unit 10 may no longer send the RGB signal to the interface unit 40 while the Linux system is running, so the MIPI signal converted from the RGB signal will naturally stop outputting. Or, it may also be that the control unit 10 controls the bridge chip 412 in the interface unit 40 to stop running while keeping the Linux system running, and no longer converts the RGB signals, thereby interrupting the MIPI signal output. Of course, when the MIPI signal is interrupted, the connecting board 42 can still continuously provide the backlight, because the existence of the backlight will not affect the replacement of the display module 50 .

Step S3, unload the display module 50 from the display module testing and display system, and connect another display module 50 to the display module testing and display system.

In this step, the display module 50 that has been tested or demonstrated is separated from the connection board 42 of the system, and the next new display module 50 to be tested or displayed is replaced, and it is connected to the connection board 42 of the system. connect.

Step S4 , sending a manipulation command to the control unit 10 through the manipulation unit 30 , and the control unit 10 controls the interface unit 40 to resume the output of the display signal according to the manipulation command.

In this step, the control command is sent to the control unit 10 again through the keys of the keyboard (control unit 30). Restart the conversion of the RGB signals, so as to restore the output of the MIPI signal used to drive the display module, continue to test or display the new display module 50, and complete the replacement operation of the display module 50.

It can be understood that, the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these variations and improvements are also regarded as the protection scope of the present utility model.

Claims (9)

1. show module test and a display systems, it is characterized in that, comprising:

Storage unit, it is for storing data information;

With the control module that described storage unit is electrically connected, it is for receiving the data message of described cell stores and being converted into image control signal;

With the interface unit that described control module is electrically connected, it is for connecting demonstration module to be tested or that show, and interface unit is also for receiving the image control signal of described control module and being converted into display;

The manipulation unit being electrically connected with described control module, it is for receiving user's manipulation instruction and sending manipulation instruction to described control module;

And,

Described control module is also for receiving described manipulation signal, and the output of interrupting or recovering display under the state that keeps operation according to interface unit described in described manipulation signal controlling.

2. demonstration module test according to claim 1 and display systems, is characterized in that,

Described interface unit be also used to show module provide show required backlight.

3. demonstration module test according to claim 2 and display systems, is characterized in that, described interface unit comprises:

The MIPI bridging board being electrically connected with control module, its image control signal for reception control unit is also converted into MIPI signal;

With the web joint that MIPI bridging board is electrically connected, it is for connecting described demonstration module, and described web joint is also for the MIPI signal from MIPI bridging board is sent to demonstration module, and for described demonstration module provide show required backlight.

4. demonstration module test according to claim 3 and display systems, is characterized in that, described MIPI bridging board comprises:

Bridging chip, it is for image control signal is converted to MIPI signal, and is electrically connected with signal input/output board;

Signal input/output board, it is electrically connected with bridging chip, control module, web joint, for the image control signal from control module is transmitted to described bridging chip, and the MIPI signal from described bridging chip is outputed to web joint.

5. demonstration module test according to claim 4 and display systems, is characterized in that, described MIPI bridging board also comprises:

The clock board for synchronizeing with described bridging chip electrical connection;

With the power panel that described bridging chip is electrically connected, it is used to described bridging chip power supply.

6. demonstration module test according to claim 3 and display systems, is characterized in that, described web joint comprises:

With the connector that described MIPI bridging board is electrically connected, it is for being transmitted to described demonstration module by the MIPI signal from described MIPI bridging board;

With the backlight module that described connector is electrically connected, be used to described demonstration module to provide to show required backlight; Backlight module comprises the driving chip being electrically connected with described connector and at least one light source being electrically connected with described driving chip.

7. according to the demonstration module test described in any one in claim 3 to 6 and display systems, described MIPI bridging board is at least 1Gbps and comprise the MIPI bridging board of at least 4 group passages of bandwidth.

8. according to the test of demonstration module and display systems described in any one in claim 1 to 6, it is characterized in that,

Described storage unit is electrically connected with described control module by interface;

Or

Described storage unit and described control module become one.

9. according to the test of demonstration module and display systems described in any one in claim 1 to 6, it is characterized in that,

Described control module is processor more than dominant frequency 1GHz.