WO2014201737A1

WO2014201737A1 - Quality detecting device of liquid crystal display module and use method thereof

Info

Publication number: WO2014201737A1
Application number: PCT/CN2013/079019
Authority: WO
Inventors: 赵国栋; 刘一俊; 陈方甫; 马涛; 宋涛; 刘明
Original assignee: 深圳市华星光电技术有限公司
Priority date: 2013-06-19
Filing date: 2013-07-08
Publication date: 2014-12-24
Also published as: CN103345077A; CN103345077B

Abstract

A quality detecting device of a liquid crystal display module (1) comprises a plurality of test points (3), a plurality of probes (2), a driving device (5) and a detecting device, wherein the test points (3) are arranged on the liquid crystal display module (1) to be detected, the plurality of probes (2) are respectively and electrically connected with the test points (3), the driving device (5) is used for driving the plurality of probes (2) to move, and the detecting device is electrically connected with the plurality of probes (2). When the liquid crystal display module (1) is detected, the driving device (5) drives the plurality of probes (2) to move to the predetermined position, and the plurality of probes (2) respectively make contact with the corresponding test points (3) to form electrical connection. The probes (2) input testing signals into the liquid crystal display module (1) through the testing points (3) so that the testing signals can be detected, the detecting device receives and processes feedback signals, corresponding to the testing signals, generated by the liquid crystal display module (1), and therefore quality indicators of the liquid crystal display module (1) can be judged according to the feedback signals. The use method of the quality detecting device of a liquid crystal display module (1) is also provided. The quality detecting device can reduce working hour difference caused by skill level difference of personnel and damage to data lines and connectors.

Description

Liquid crystal display module quality detecting device and using method thereof

Technical field

The invention relates to a quality detecting technology of a liquid crystal display module, in particular to a quality detecting device of a liquid crystal display module and a using method thereof.

Background technique

In the field of liquid crystal panel module manufacturing, for example, in the field of manufacturing a liquid crystal panel module in a twisted nematic panel, for example, in a manufacturing process of a liquid crystal module such as a twisted nematic panel, a liquid crystal panel bonding is required to make the panel and the driving The integrated circuit and the printed circuit board are connected, and then combined with the backlight, and then fixed by the front frame to form a complete liquid crystal display module. After completing the custom manufacturing process for the liquid crystal panel, it is often necessary to input a test signal to the printed circuit board, and after the onboard integrated circuit is processed and processed, the liquid crystal panel is driven by the flip chip/flex circuit board to perform screen test to detect the liquid crystal panel. Defects in printed circuit boards, driver ICs, and circuits.

At present, in the picture test process after the LCD panel is bonded, the external test signal is usually through multiple flexible lines (flexible flat A cable, FFC, or other data line is connected to a connector on the printed circuit board to be input into the printed circuit board. When connecting a data line such as an FFC to a connector, it is usually an operator manually inserting each FFC port into a corresponding slot on the connector, which may result in different skill levels of the personnel and their own limitations. The length of work time is not easy to control. At the same time, the manual operation accuracy is poor, which may cause damage to data lines and connectors (welded on the printed circuit board) such as FFC.

Summary of the invention

The main object of the present invention is to provide a kind of defect that can reduce the length of the working time caused by the problem of the proficiency of the operator in the prior art, which is difficult to control and shorten, and which is liable to cause damage to the data line and the connector. The liquid crystal display module quality detecting device and the method of using the difference in the working time caused by the skill level of the operator and the damage of the data line and the connector.

The present invention provides a liquid crystal display module quality detecting device and a method for using the same, the quality detecting device comprising a plurality of test points disposed on a liquid crystal display module to be detected, and electrically connected to the plurality of test points a plurality of probes, a driving device for driving the movement of the plurality of probes, and a detecting device electrically connected to the plurality of probes; when detecting the liquid crystal display module, driving the driving device The plurality of probes are moved to a predetermined position, respectively contacting the corresponding test points to form an electrical connection, and the probe inputs a test signal to the liquid crystal display module through the test point to the liquid crystal display The module performs detection, and the detecting device receives and processes a feedback signal generated by the liquid crystal display module corresponding to the test signal to determine a quality indicator of the liquid crystal display module.

In the above-described quality detecting device for a liquid crystal display module, the liquid crystal display module includes a printed circuit board and a connector fixedly mounted on the printed circuit board, and the plurality of test points are disposed on the printed circuit board or On the connector.

The quality detecting device of the liquid crystal display module further includes a data line connected to the probe and a substrate for fixedly mounting the data line and the probe, each of the probes being vertically connected On the lower surface of the substrate.

In the quality detecting device of the liquid crystal display module described above, the number of the data lines is plural and is in one-to-one correspondence with the plurality of probes, and is respectively connected to each of the corresponding probes.

In the quality detecting device of the liquid crystal display module described above, the data line is simultaneously connected to the plurality of probes.

In the above-described mass detecting device for a liquid crystal display module, the driving device includes any one of a motor, a cylinder, and a motor.

A method for quality detection of a liquid crystal display module includes the following steps:

Providing a plurality of test points for inputting a test signal to the liquid crystal display module on the liquid crystal display module to be detected;

Making a plurality of probes for electrically connecting the plurality of test points for providing a test signal, and connecting the plurality of probes to the driving device;

Driving the plurality of probes to a predetermined position by using a driving device, respectively contacting the corresponding test points to form an electrical connection, and the probe inputs the test signal to the liquid crystal display module through the test point Detecting the liquid crystal display module;

The plurality of probes are electrically connected to the detecting device, and the detecting device receives and processes a feedback signal generated by the liquid crystal display module corresponding to the test signal to determine a quality indicator of the liquid crystal display module.

In the above method for detecting a quality of the liquid crystal display module, the step of providing a plurality of test points for inputting a test signal to the liquid crystal display module on the liquid crystal display module to be detected includes:

The plurality of test points are disposed on a printed circuit board or a connector of the liquid crystal display module.

The above method for detecting the quality of the liquid crystal display module further includes the following steps:

The probe is connected to the detection device with a data line.

The data lines and probes are fixedly mounted on a substrate, wherein each of the probes is vertically connected to a lower surface of the substrate.

The invention has the beneficial effects that the present invention changes the connection mode of the prior art to the contact connection mode, and simultaneously drives the plurality of probes to respectively contact the corresponding test points, so that during the detection operation It can significantly improve the automation of the operation, eliminating the need to manually plug and unplug the data line, which can reduce the difference in working time caused by different levels of proficiency, which is beneficial to save manpower and time, and can significantly reduce data lines and connectors such as FFC. Damage to improve product yield.

DRAWINGS

The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a first embodiment of a liquid crystal display module quality detecting apparatus according to the present invention;

2 is a schematic structural view of a second embodiment of a liquid crystal display module quality detecting apparatus according to the present invention;

FIG. 3 is a flow chart showing the operation of the liquid crystal display module quality detecting method provided by the present invention.

detailed description

The liquid crystal display module quality detecting device and the using method thereof provided by the invention are suitable for screen testing of a liquid crystal panel after bonding. The invention adopts the contact between the probe and the solder joint to form an electrical connection, thereby realizing the transmission of the test signal, thereby reducing the insertion and removal, and the damage of the connector, the data line and the like is not easily generated; meanwhile, the present invention also drives the driving device. The contact between the probe and the solder joint avoids the defect that the operator's proficiency is different and the working time is greatly different due to manual operation. This realizes the automation of the screen test after the LCD panel is bonded.

Referring to FIG. 1 , a schematic diagram of a first embodiment of a liquid crystal display module quality detecting device provided by the present invention is provided. The liquid crystal display module quality detecting device comprises a liquid crystal display module 1, a plurality of test points 3, a plurality of probes 2, a substrate 4, a data line (not shown), a driving device 5, and a detecting device (not shown) show). Of course, in other embodiments, the quality detecting device may not include the data line and the substrate 4, and the detecting device directly connects to the probe 2 to transmit a signal. The detecting device is configured to receive and process a feedback signal generated by the corresponding test signal of the liquid crystal display module, and determine the quality indicator according to the determination. The probe 2 or the data line is electrically connected to the detecting device 6, and the feedback signal can be output thereto. The liquid crystal display module 1 includes a liquid crystal panel 11, a flip chip/flex circuit board 12, a connector 13, and a printed circuit board 14. The connector 12 is fixedly mounted on the printed circuit board 13, and the flip chip/flex circuit board 12 is connected between the printed circuit board 14 and the liquid crystal panel 12. A plurality of test points 3 are spaced apart on the connector 13. The interval is preferably set at equal intervals, and of course, the size of the interval can be arbitrarily determined. The number of test points 3 can be determined according to the needs in the actual inspection and is reserved during the processing of the printed circuit board 14 or the connector 13. Of course, in other embodiments, the connector 13 may be provided with a slot for inserting the FFC data line while a plurality of test points are spaced apart on the surface of the connector 13. The test point 3 is in communication with a circuit on the connector 13 and can be used to transmit signals to the liquid crystal display module 1.

A plurality of probes 2 are provided, and the number of probes 2 is the same as the number of test points 3. The position of the probe 2 corresponds to the position of the test point 3, with the same spacing setting. The plurality of probes 2 are fixed on one substrate 4 and extend vertically downward along the lower surface of the substrate 4. The probe 2 is connected to the data line, and one data line can be connected to multiple probes or multiple data lines can be connected to multiple probes 2. Different data lines can have the same test signal to the probe 2, and can also provide different Test the signal into probe 2. The probe 2 is connected to the driving device 5, and may be directly connected to each other or may be connected through the substrate 4 for driving the probe 2 to move to a predetermined position, that is, a position in contact with the test point 3. In the present embodiment, the driving device 5 may be a cylinder, a motor or a motor. The driving device 5 may further include a clamping portion for clamping the substrate 4 to drive the substrate 4 to move. Of course, the substrate 4 may be fixed to the motion output portion of the driving device 5 by screwing. In other embodiments, other connection relationships are also possible. The driving device 5 can drive the substrate 4 and the probe 2 for translation, lifting, flipping, and the like.

Referring to FIG. 2, a schematic diagram of a second embodiment of a liquid crystal display module quality detecting apparatus provided by the present invention is shown. The difference between the embodiment in which the plurality of test points 3 are spaced apart from the connector 13 in the first embodiment is that the plurality of test points 3 are spaced apart on the printed circuit board 14. Of course, it can be set at equal intervals or at different intervals. The number of test points 3 is determined according to the actual detection needs.

3 is a working flow chart of a method for detecting quality of a liquid crystal display module according to the present invention. The method of using the first or second embodiment of the above-mentioned liquid crystal display module quality detecting device is specifically the following steps:

S1 A plurality of test points 3 are provided on the liquid crystal display module 1. A plurality of test points 3 are pre-spaced during the processing including the connector 13 of the liquid crystal display module 1 or the printed circuit board 14. These test points 3 are in communication with the circuitry in the connector 13 or printed circuit board 14 and can be used to input test signals.

S2 A plurality of probes 2 are produced, the number of probes 2 is the same as the number of test points 3, and the position of the probe 2 corresponds to the position of the test point 3, that is, has the same interval setting. A plurality of probes 2 are connected to the driving device for driving the plurality of probes 2 to move to a predetermined position, that is, a position in contact with the test point 3.

S3 When the liquid crystal display module is assembled and the detection is performed, the driving device drives the probe 2 to contact the test point 3, and each probe 2 is in contact with its corresponding test point 3, and an electrical connection is formed therebetween. The probe 2 transmits the test signal to the test point 3, and the test point 3 outputs the test signal to the liquid crystal display module 1 to detect the liquid crystal display module 1. In this step, the data line and the substrate 4 may be further disposed, and the data line is connected to the probe 2, and the data line and the plurality of probes 2 are fixedly mounted on the substrate 4, and each of the probes 2 is vertical. Ground is attached to the lower surface of the substrate 4.

S4 The plurality of probes 2 are electrically connected to the detecting device, and the feedback signal generated by the liquid crystal display module corresponding to the test signal is received and processed by the detecting device, and the quality index of the liquid crystal display module 1 is determined accordingly. In this step, the probe 2 can also be electrically connected to the detecting device through the data line.

The invention changes the connection mode in the prior art to the contact connection mode, and simultaneously drives the plurality of probes to respectively contact the corresponding test points, so that the detection degree can reduce the degree of proficiency of the personnel. The resulting difference in operating time significantly reduces the damage of data lines and connectors such as FFC, which in turn helps reduce the cost of screen testing after LCD panel bonding, while effectively reducing customer complaints and enhancing the company's brand value and product competitiveness.

It is to be understood that those skilled in the art will be able to make modifications and changes in accordance with the above description, and all such modifications and variations are intended to be included within the scope of the appended claims.

Claims

A quality detecting device for a liquid crystal display module, comprising: a plurality of test points disposed on a liquid crystal display module to be detected; and a plurality of probes electrically connected to the plurality of test points, respectively, for driving a driving device for moving the plurality of probes and a detecting device electrically connected to the plurality of probes; when detecting the liquid crystal display module, the driving device drives the plurality of probes to move to a predetermined position Electrically connecting with the corresponding test point, the probe inputs a test signal to the liquid crystal display module through the test point to detect the liquid crystal display module, and the detecting device Receiving and processing the feedback signal generated by the liquid crystal display module corresponding to the test signal to determine a quality indicator of the liquid crystal display module.
The quality detecting device for a liquid crystal display module according to claim 1, wherein the liquid crystal display module comprises a printed circuit board and a connector fixedly mounted on the printed circuit board, wherein the plurality of test points are disposed at On the printed circuit board or connector.
A quality detecting device for a liquid crystal display module according to claim 1, further comprising a data line connected to said probe and a substrate for fixedly mounting said data line and said probe, each of said probes The needles are all vertically connected to the lower surface of the substrate.
The quality detecting device of the liquid crystal display module according to claim 3, wherein the number of the data lines is plural and is in one-to-one correspondence with the plurality of probes, and is respectively connected to each of the corresponding probes.
The quality detecting device of a liquid crystal display module according to claim 3, wherein the data line is simultaneously connected to the plurality of probes.
The quality detecting device for a liquid crystal display module according to claim 1, wherein the driving device includes any one of a motor, a cylinder, and a motor.
A method for detecting quality of a liquid crystal display module, comprising the following steps:

Providing a plurality of test points for inputting a test signal to the liquid crystal display module on the liquid crystal display module to be detected;

Making a plurality of probes for electrically connecting the plurality of test points for providing a test signal, and connecting the plurality of probes to the driving device;

Driving the plurality of probes to a predetermined position by using a driving device, respectively contacting the corresponding test points to form an electrical connection, and the probe inputs the test signal to the liquid crystal display module through the test point Detecting the liquid crystal display module;

The plurality of probes are electrically connected to the detecting device, and the detecting device receives and processes a feedback signal generated by the liquid crystal display module corresponding to the test signal to determine a quality indicator of the liquid crystal display module.
The method for detecting a quality of a liquid crystal display module according to claim 7, wherein the step of providing a plurality of test points for inputting a test signal to the liquid crystal display module on the liquid crystal display module to be detected includes :

The plurality of test points are disposed on a printed circuit board or a connector of the liquid crystal display module.
The method for detecting quality of a liquid crystal display module according to claim 8, further comprising the steps of:

The probe is connected to the detection device with a data line.
The method for detecting quality of a liquid crystal display module according to claim 8, further comprising the steps of:

The data lines and probes are fixedly mounted on a substrate, wherein each of the probes is vertically connected to a lower surface of the substrate.