Tiled Display Panel Pixel Layout for Seam Pitch Uniformity
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Solution Overview
Problem
Tiled display panels exhibit discrepancies in pixel pitch at seams, leading to visual defects such as wide black strips, affecting display uniformity and quality.
Innovation Solution
The display panel design includes sub-panels with specific pixel arrangements and adjustments to ensure consistent spacing between effective display bodies at seams and non-seam areas, utilizing precise cutting and grinding processes to minimize seam width and maintain uniform pixel pitch.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If sub-panels are tiled together to form a large display, then the display size is increased, but the pixel pitch at seams becomes inconsistent with non-seam areas, causing visual defects
Solution Approach 1:
The patent applies local quality by implementing different pixel arrangements specifically at seam locations versus non-seam locations. Sub-panels are designed with adjusted pixel pitch values at their edge regions compared to their central regions, allowing the tiled assembly to achieve uniform overall pixel pitch despite the presence of seams. This localized adjustment ensures that pixels at seam boundaries align properly with adjacent sub-panels.
Solution Approach 2:
The patent employs preliminary action by pre-calculating and pre-adjusting the pixel pitch values during the sub-panel manufacturing stage. The pixel pitch at edges is deliberately designed to be different from the center pixel pitch, and this adjustment is made before the tiling assembly process. This preliminary design ensures that when sub-panels are tiled together, the pixels at seam boundaries naturally align with the required overall pixel pitch without requiring post-assembly adjustments.
2Manufacturing precision
If pixel pitch at seams is adjusted to match overall pixel pitch, then display uniformity is improved, but the complexity of pixel arrangement increases
Solution Approach 1:
The patent applies segmentation by dividing the pixel array into distinct regions: central regions with standard pixel pitch and edge regions with adjusted pixel pitch. This segmentation allows different pixel arrangement strategies to be applied to different parts of the sub-panel, simplifying the overall design compared to attempting a uniform solution across the entire panel. The edge regions are further segmented into specific columns or rows adjacent to seams that require pitch adjustment.
Solution Approach 2:
The patent implements local quality by applying specific pixel pitch adjustments only to pixels located at edge regions near seams, while maintaining standard pixel pitch in central regions. This localized approach minimizes the number of pixels requiring special arrangement, thereby reducing overall complexity. The adjustment is confined to specific columns or rows at the boundaries of sub-panels, leaving the majority of the pixel array unchanged.
Data Source
AI summary
A display panel includes a plurality of sub-panels tiled in sequence along a first direction. The sub-panels have a first edge and a second edge in the first direction. The sub-panels include a column of first pixels closest to the first edge, a column of second pixels closest to the second edge, and a plurality of columns of third pixels between the column of first pixels and the column of second pixels. A sum of a distance between effective display bodies in the first pixels and the first edge and a distance between effective display bodies in the second pixels and the second edge is smaller than a spacing between effective display bodies in two adjacent columns of the third pixels.