Frame glue coating detection method
A detection method and sealant technology, which are applied in the fields of instruments, nonlinear optics, optics, etc., can solve the problems of inability to detect abnormal sealant cross-sectional area, small sealant cross-section, and large sealant cross-section.
Active Publication Date: 2020-12-22
WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
Since the detection principle of this method is to scan the top-view image of the frame, it can only detect whether the width of the frame meets the standard, but cannot detect the height of the frame
However, in actual production, if the width of the frame glue meets the standard but the height of the frame glue is too small, the section of the frame glue will be small, and the problem of liquid crystal leakage will occur after lamination. If it is too large, the section of the sealant will be larger, and the excess sealant will enter the display area of the LCD box after lamination, affecting the display quality
The existing technology cannot effectively detect the abnormal cross-sectional area of the frame rubber
Method used
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[0034] In order to further illustrate the technical means adopted by the present invention and its effects, the following describes in detail in conjunction with preferred embodiments of the present invention and accompanying drawings.
[0035] see figure 2 , the present invention provides a frame glue coating detection method, comprising the following steps:
[0036] Step S1, please refer to image 3 , providing a substrate 10 . At least one set of sealant test lines 20 is arranged on one side of the substrate 10 . The sealant test circuit 20 includes two spaced conduction ends 21, two spaced detection ends 22 and two traces 23, each detection end 22 corresponds to a conduction end 21, and one trace 23 corresponds to the A detection terminal 22 is electrically connected to the conduction terminal 21 corresponding to the detection terminal 22 .
[0037] Specifically, the substrate 10 may be a TFT array substrate, or a CF substrate.
[0038] Specifically, in image 3 In ...
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The invention provides a frame glue coating detection method. The frame glue coating detection method comprises the following steps: a frame glue test circuit is arranged on one side of a substrate and conductive particles are incorporated into the glue material to make the glue material doped with the conductive particles conductive; after that, the glue material doped with the conductive particles is applied to the side of the substrate where the frame glue test circuit is provided, corresponding frame glue test circuit forms a frame glue, and the frame glue covers the two conductive ends ofthe corresponding frame glue test circuit; then a preset test voltage is applied between the two detection ends of the frame glue test circuit, and the current flowing through the frame glue is detected by the detecting end of the frame glue test circuit. When the current of the frame glue is within the standard current range, the frame glue is judged to be qualified, otherwise the frame glue isdetermined to have defects, thereby effectively detecting whether the cross-sectional area of the frame glue is abnormal.
Description
technical field [0001] The invention relates to the field of display technology, in particular to a method for detecting sealant coating. Background technique [0002] Liquid crystal display (Liquid Crystal Display, LCD) has many advantages such as thin body, power saving, and no radiation, and has been widely used, such as mobile phones, personal digital assistants (PDA), digital cameras, computer screens or notebook computer screens Wait. [0003] Most of the liquid crystal display devices currently on the market are backlight liquid crystal display devices, which include a housing, a liquid crystal display panel disposed in the housing, and a backlight module disposed in the housing. The structure of a traditional liquid crystal display panel is composed of a color filter substrate (Color Filter, CF), a thin film transistor array substrate (Thin FilmTransistor Array Substrate, TFT Array Substrate), and a liquid crystal layer (Liquid Crystal Layer), its working principle...
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IPC IPC(8): G02F1/13G02F1/1339
CPCG02F1/1309G02F1/1339
Inventor 马涛
Owner WUHAN CHINA STAR OPTOELECTRONICS TECH CO LTD