Edge Pixel Layout for Seam-Uniform Tiled Displays
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Solution Overview
Problem
Current tiled electronic devices often experience defects such as bright lines or dark lines at the seams between adjacent devices, which affect display performance.
Innovation Solution
The display device incorporates a substrate with specific arrangements of light emitting units, where the first group of light emitting units has a first and second color arranged along a first direction, and the second group has the same color arrangement but with varying distances and widths from the edge, optimizing pixel pitch and reducing seam defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform pixel arrangement is used in tiled display devices, then manufacturing is simplified, but bright lines or dark lines occur at the seams between adjacent devices
Solution Approach 1:
The patent applies local quality by making the first pixel (located at the edge of the substrate) have a different width from the second pixel (located inside the substrate). Specifically, the first pixel has a smaller width in the first direction than the second pixel. This local variation in pixel dimensions compensates for the gap between adjacent substrates, ensuring uniform light emission across the seam while maintaining overall manufacturing feasibility.
2Reliability
If the first pixel width is reduced to compensate for seam gaps, then display uniformity improves, but the pixel area and light emission capability deteriorate
Solution Approach 1:
The patent employs asymmetry by creating non-uniform pixel widths where the first pixel (at the edge) has a different width than the second pixel (inside). The first pixel width in the first direction is specifically designed to be smaller than the second pixel width, creating an asymmetric arrangement that optically compensates for the seam gap. This asymmetric design maintains display uniformity while the patent separately addresses light emission through other means such as adjusting pixel pitch or using optical compensation techniques.
Data Source
AI summary
A display device includes a substrate having an edge extending along a first direction, a first group of a plurality of light emitting units including a first light emitting unit having a first color and a second light emitting unit having a second color, and a second group of a plurality of light emitting units including a first light emitting unit having the first color and a second light emitting unit having the second color. A distance between the first light emitting unit in the first group and the edge is less than a distance between the first light emitting unit in the second group and the edge along the second direction. A width of the first light emitting unit in the first group is less than a width of the first light emitting unit in the second group along the second direction.