Method for repairing light leakage defects of display screen by using laser scribing scanning

Abstract

The invention discloses a method for repairing light leakage defects of a display screen by using laser scribing scanning. The method comprises the following steps of 1, fixing a display screen to berepaired on a processing platform after the surface of the display screen to be repaired is cleaned, adjusting laser transmission direction of a laser or the angle of the processing platform to make laser beam be perpendicular to the surface of the display screen to be repaired; 2, adjusting laser parameters according to the required repairing pixel size, ITO blackening degree and depth, and irradiating ITO perpendicular to the surface of the display screen to be repaired by using a plurality of pulse lasers to blacken the surface of the ITO; 3, setting a laser scanning path according to the size of the area required to be blackened, wherein the path is a plurality of parallel line segments to cover the ITO area required to be blackened; and 4, adjusting the laser pulse frequency f to be between 100 Hz and 1,000 Hz, setting the laser machining initial point, and blackening the ITO on the surface of the display screen to be repaired by using the processing parameters in step 1, 2, and 3through a scribing scanning mode or pulse dotting so as to repair the light leakage defects. According to the method, the repairing effect is good.

Description

technical field [0001] The invention belongs to the field of lasers, and in particular relates to a method for repairing light leakage defects of a laser scribing and scanning display screen. Background technique [0002] In recent years, with the rapid development of new technologies such as materials, microelectronics, and semiconductor manufacturing and application, the flat panel display industry has emerged, especially in OLED because of its low power consumption, wide viewing angle, active light emission, and easy flexible manufacturing. Advantages are receiving increasing attention. [0003] However, the complex process in the production process leads to inevitable defects in the product, such as the failure of the ITO (nano indium tin oxide) electrode, the short circuit of the signal electrode and the scanning electrode, etc., which will affect the display effect and reduce the product yield. . [0004] In addition to the above-mentioned flaws, during the panel pro...

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Problems solved by technology

[0007] However, the above method cannot be fully applied to all display panel light leakage defects

For the case where there are too many conductive particles and the distribution position is difficult to determine, the defects cannot be completely repaired; in addition, if the peripheral electrode of the defect area is irradiated with laser, the laser cannot accurately act on the defect position during the electrode cutting process, which will affect other normal areas and lead to repair. fail

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