A display defect repair method for a semiconductor display panel without an upper polarizing film
A technology for display panels and display defects, applied in optics, optical components, nonlinear optics, etc., can solve problems such as product universality, poor compatibility, damage, and product liquid crystal leakage.
Active Publication Date: 2022-07-12
BEIJING C&W TECH DEV
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Problems solved by technology
[0003] In the prior art, the common laser processing scheme in the repair of bright spot defects of the display panel is to use the method of carbonizing or blocking a certain film layer (COWINDST Patent Publication No. 101779157A of Korea Corporation). The specific processing parts are: color filter film ( CF), black frame (BM), or transparent electrode (ITO) layer, etc. The processing position selected by these methods is very close to the liquid crystal and alignment layer in the box, about tens of microns, which may cause greater damage to the product such as liquid crystal leakage. Risk; whether the repair can be performed is often too dependent on whether the product contains a special film structure, such as a wide enough BM or a thick enough protective layer (OC); in addition, the existing repair technology is universal and compatible with different products Not strong
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[0041] like figure 1 As shown, the core of the present invention is to provide a display defect repair method for a semiconductor display panel without an upper polarizing film, which includes the following steps:
[0042] S1: Sample preparation: light up the display panel with the point defect area;
[0043] S2, measurement: measure the optical phase difference that needs to be corrected for the point defect area deviating from the normal area polarization state in step S1;
[0044] S3. Repair: Using the optical phase difference of step S2, focus the femtosecond pulsed laser 1 in the glass transparent substrate 6 of the display panel, scan in the glass transparent substrate 6 corresponding to the point defect area, and locally modify the process to obtain birefringence Nano-grating structure 5; it should be noted that the numerical aperture range of the processing objective lens of the femtosecond pulsed laser 1 is 0.2-1.2 NA.
[0045] S4, re-measurement: set the repair con...
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Abstract
The present invention relates to a display defect repair method for a semiconductor display panel without an upper polarizing film, comprising the following steps: S1: preparing a sample: lighting a display panel with a point defect area; S2, measuring: measuring step S1, the point defect area deviates from a normal area The optical phase difference required to be corrected for the polarization state; S3. Repair: with the optical phase difference in step S2, focus the femtosecond pulsed laser in the glass transparent substrate of the display panel, and scan in the glass transparent substrate corresponding to the point defect area, The birefringent nano-grating structure is obtained by local modification processing; S4, re-measurement: set the repair conditions that meet the repair effect, detect the optical characteristic parameters of the birefringent nano-grating structure, judge whether the repair conditions are met, and if not, perform secondary repair. The present invention adopts the above scheme to process the birefringent nano-grating structure in the glass light-transmitting substrate of the display panel, without setting a specific layer structure in the display panel, and can adapt to the repair of different types of semiconductor display panels with good compatibility.
Description
technical field [0001] The present invention relates to the technical field of semiconductor display, in particular to a method for repairing display defects of a semiconductor display panel without an upper polarizing film. Background technique [0002] Liquid crystal display technology is one of the most mature semiconductor flat panel display technologies in existence. It mainly uses that when the liquid crystal molecules are deflected under the action of an electric field, it can produce a controllable phase delay to the light beam passing through the liquid crystal within a certain range, so as to control the polarization state of the light beam. The purpose of making pixels display different brightness levels and color combinations. [0003] In the prior art, a common laser processing solution in the repair of bright spot defects of a display panel is to carbonize or block a certain film layer (Korea Co., Ltd. COWINDST Patent Publication No. 101779157A), and the speci...
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IPC IPC(8): G02F1/13G02F1/1335G02B27/28
CPCG02F1/1309G02F1/133504G02B27/286
Inventor 刘欣王馨莹王福旺孟鹏飞张亚辉李立锋林涛
Owner BEIJING C&W TECH DEV