Touch Electrode Grid Layout to Reduce Display Panel Light Leakage
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Solution Overview
Problem
The visibility of metal grids at large viewing angles due to light leakage from disconnected parts of touch electrodes in display panels affects the display effect, particularly noticeable with green subpixels which have smaller pixel openings.
Innovation Solution
The display panel design includes a touch layer with insulated touch electrodes featuring disconnected parts arranged to avoid the area between the edges of pixel openings, ensuring these parts do not overlap the pixel openings, thereby reducing light emission through the disconnected areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If metal grids are used for touch electrodes, then touch function is enabled, but metal grids become visible at large viewing angles affecting display effect
Solution Approach 1:
The touch electrode is divided into multiple disconnected parts rather than using continuous metal grids. The disconnected parts are strategically positioned to avoid overlapping with pixel openings, thereby reducing light leakage and metal grid visibility while maintaining touch functionality.
Solution Approach 2:
The patent applies different structural characteristics to different regions of the touch electrode. The disconnected parts are specifically positioned in areas that do not overlap with pixel openings, creating local variations in structure to minimize visibility issues while preserving touch sensitivity in required areas.
2Object-affected harmful factors
If disconnected parts are added between touch electrodes, then metal grid visibility is reduced, but device complexity increases
Solution Approach 1:
The touch electrode is segmented into disconnected parts with insulating layers between them. This segmentation reduces metal grid visibility by preventing continuous light leakage paths while maintaining electrical functionality through capacitive coupling between adjacent disconnected parts.
3Object-affected harmful factors
If disconnected parts avoid pixel opening areas, then light leakage is reduced, but manufacturing precision requirements increase
Solution Approach 1:
The disconnected parts are positioned with specific spatial relationships to pixel openings - avoiding overlap with smaller pixel openings while maintaining appropriate spacing. This localized positioning strategy reduces light leakage in critical areas while managing manufacturing precision requirements through deliberate design of the avoided zones.
Data Source
AI summary
A display panel includes a display panel comprising a display layer and a touch layer arranged on a side of the display layer. The display layer includes a plurality of subpixels and a plurality of pixel openings. The plurality of subpixels includes first color subpixels and second color subpixels. The plurality of pixel openings includes first color pixel openings and second color pixel openings. A first color subpixel corresponds to a first color pixel opening. A second color subpixel corresponds to a second color pixel opening. An area of the first color pixel opening is larger than an area of the second color pixel opening. The touch layer includes a plurality of touch electrodes insulated from each other, and the plurality of touch electrodes includes a plurality of electrically connected metal grids.