Shield Electrode Density in LCD Array Substrates
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Solution Overview
Problem
Current liquid crystal display panels experience significant light leakage in a dark state due to trapezoidal cross-sectional surfaces of shield electrodes, which are formed during the etching process, affecting the display effect, especially with bending or crossed right-angle wiring designs.
Innovation Solution
The array substrate and liquid crystal display panel design includes data lines, scanning lines, and common electrode lines with pixels comprising first, second, and third sub-pixels, where the disposition density of shield electrodes is adjusted such that it is lower for first sub-pixels compared to third sub-pixels, reducing light leakage by optimizing the placement and density of shield electrodes in specific areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If shield electrodes are added to shield pixel electrodes from data lines, then shielding effect is improved, but light leakage in dark state increases due to trapezoidal cross-sectional surfaces
Solution Approach 1:
The patent applies different disposition densities of shield electrodes to different sub-pixel regions. Specifically, the first sub-pixels have a lower disposition density of shield electrodes compared to the third sub-pixels, creating local variations in shielding strength that reduce overall light leakage while maintaining necessary electromagnetic shielding in critical areas.
Solution Approach 2:
The patent divides the pixel array into different sub-pixel types (first, second, and third sub-pixels) with different shield electrode configurations. This segmentation allows selective optimization of shielding效果 in different regions, preventing uniform over-shielding that causes light leakage while maintaining necessary shielding where required.
2Ease of manufacture
If uniform disposition density of shield electrodes is used across all sub-pixels, then manufacturing is simplified, but light leakage cannot be optimized in specific sub-pixel regions
Solution Approach 1:
The patent implements non-uniform disposition densities of shield electrodes across different sub-pixel regions. The first sub-pixels have a lower disposition density compared to the third sub-pixels, allowing optimization of light leakage performance in specific regions while maintaining manufacturability through a systematic gradient approach rather than completely arbitrary configurations.
Data Source
AI summary
An array substrate and a liquid crystal display panel are provided. The array substrate includes data lines, scanning lines, common electrode lines, and pixels. Wherein, first areas corresponding to and adjacent to the data lines, second areas corresponding to and adjacent to the scanning lines, third areas corresponding to the common electrode lines, and fourth areas between adjacent rows of the pixels are provided with shield electrodes, and a disposition density of the shield electrodes corresponding to first sub-pixels is less than a disposition density of the shield electrodes corresponding to third sub-pixels. The present disclosure reduces dark-state light leakage phenomenon.