Post-casing detection device and method for liquid crystal display panel

A technology of liquid crystal display panel and detection device, which is applied in the direction of measuring device, measuring electricity, measuring electrical variable, etc., can solve the problems of whether the defective repair of the liquid crystal display panel is successful, the waste of manpower, raw materials and process comprehensive cost, etc.

Active Publication Date: 2011-01-26
BOE TECH GRP CO LTD +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the assembly department, LCD panels need to go through a series of external inspections such as aging and knocking. Such panels that are not completely repaired successfully will appear defective at the maintenance point 3, which is called NG (Not Good, defective) products, and finally caused manpower. The waste of various comprehensive costs such as raw materials and processes
[0005] It can be seen that there is still no good way to detect whether the repair of the bad opening of the grid line of the LCD panel is successful

Method used

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  • Post-casing detection device and method for liquid crystal display panel
  • Post-casing detection device and method for liquid crystal display panel
  • Post-casing detection device and method for liquid crystal display panel

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Embodiment 2

[0067] Such as Figure 10 As shown, the detection method behind the liquid crystal display panel box in this embodiment may include:

[0068] S1001. Select a detection frame, and output a detection signal of the selected detection frame. For example, you can select any grayscale detection picture, such as L60-L100.

[0069] S1002. Input the detection signal to the timing controller, and observe the screen display on the liquid crystal display panel.

[0070] At this time, you can observe the screen displayed on the LCD panel. Figure 5 In the picture shown on the left, it may be a vanishing point (or a low-brightness point), but it cannot be determined that the maintenance of the grid line opening is not successful.

[0071] S1003. Increase the frequency of the detection signal input to the timing controller, thereby increasing the frequency of the grid scanning signal, observe the screen display on the liquid crystal display panel, and determine the defective type of the l...

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Abstract

The invention discloses a post-casing detection device and a post-casing detection method for a liquid crystal display panel, and relates to liquid crystal display technology, which can detect whether an open grid line of the liquid crystal display panel is successfully maintained or not. The post-casing detection device for the liquid crystal display panel comprises a detection signal generator, a pulse power supply module, a time schedule controller which is connected with the detection signal generator, a grid driver which is connected with the pulse power supply module and the time schedule controller, a source driver which is connected with the time schedule controller, and a variable frequency control unit which is connected with the time schedule controller and is used for increasing the frequency of a signal input into the grid driver. The device and the method are suitable for the post-casing detection of the liquid crystal display panel.

Description

technical field [0001] The invention relates to liquid crystal display technology, in particular to a detection device and detection method behind a liquid crystal display panel box. Background technique [0002] In the array process of liquid crystal display, after the gate line is opened, it needs to be repaired by CVD (Chemical Vapor Deposition, chemical vapor deposition). Due to the limitation of process and parameters, this repair has a certain failure rate . [0003] Specifically, the opening conditions of such gate lines can be referred to figure 1 , for the sake of brevity, except for the gate line x and the data line y, others have been omitted in the figure. Wherein, an opening 2 appears on the gate line x. During the circuit detection process of the array panel, if such defects are found, such defects will be repaired. Specific principle reference figure 1 , first at both ends of the opening 2, the protective material is penetrated, the purpose is to make two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G09G3/00G02F1/13G01R31/02
Inventor 陈则
Owner BOE TECH GRP CO LTD
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