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Method for testing abnormal screen defect of LCD

A technology of abnormal defects and testing methods, applied in nonlinear optics, instruments, optics, etc., can solve problems such as high customer complaints and increased product maintenance costs, and achieve the effect of improving product reliability.

Inactive Publication Date: 2015-06-03
OCEANKING DONGGUAN LIGHTING TECH +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] At present, conventional LCD manufacturers have no corresponding testing methods to detect the design defects that may be hidden between the various LCD connectors in the product, especially products with abnormal LCD screen defects that may exist after long-term use are even more uncontrollable. As a result, the number of customer complaints after the launch of the follow-up products is high, and the maintenance cost of the products increases

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  • Method for testing abnormal screen defect of LCD

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Embodiment Construction

[0027] In order to further illustrate the principle and structure of the present invention, preferred embodiments of the present invention are now described in detail.

[0028] In this embodiment, the LCD designed and produced by a certain LCD manufacturer is tested to find out whether the LCD products produced by it have PCB connection defects, which will cause abnormalities such as poor contact or shedding of the PCB after long-term use of the LCD, resulting in a decrease in the performance of the LCD product or even unable to work properly.

[0029] Such as figure 1 As shown, the method for testing the abnormal defect of the LCD screen of the present embodiment comprises the following steps:

[0030] Step 1, connect the LCD to be tested with power and signal and perform routine picture quality inspection. For the LCD to be tested in this step, 3 LCD product samples are randomly selected from the LCD products produced according to the time sequence of LCD production by the...

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Abstract

The invention provides a method for testing the abnormal screen defect of an LCD. A thermal shock test and a high temperature and high humidity test are performed on the LCD to be tested, and the LCD is examined to detect whether the connection of an FPC and a connecting piece is abnormal, so that the potential abnormal screen defect of the LCD can be exposed; as a result, the defect can be overcome by virtue of design, and finally, the connection design defect of the LCD having the hidden abnormal screen trouble can be eliminated thoroughly, the number of the products having the hidden abnormal screen trouble of the LCD can be reduced and the product reliability can be improved.

Description

technical field [0001] The invention belongs to the technical field of liquid crystal display, and in particular relates to a method for quickly testing LCD defects, especially FPC connection defects in LCDs. Background technique [0002] LCD (Liquid Crystal Display), also known as liquid crystal display, is a flat display device, which consists of a certain number of color or black and white pixels, placed in front of a light source or reflective surface. Liquid crystal displays consume very little power, making them favored by engineers for electronic devices that run on batteries. Its main principle is to stimulate liquid crystal molecules with current to generate points, lines, and surfaces to form a picture with the back lamp tube. [0003] From the perspective of the structure of the liquid crystal display, whether it is a notebook computer or a desktop system, the LCD display screen used is a layered structure composed of different parts. The LCD consists of two gla...

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Application Information

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IPC IPC(8): G02F1/13
CPCG02F1/1309
Inventor 周明杰王永清
Owner OCEANKING DONGGUAN LIGHTING TECH