Display Panel Pixel Electrode Bar Spacing for Uniform Brightness
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Solution Overview
Problem
Display panels often suffer from dot mura phenomena due to uneven brightness distribution caused by varying aperture ratios resulting from light shielding patterns of different sizes, leading to suboptimal visual effects.
Innovation Solution
A display panel design featuring a first and second substrate with scan lines, data lines, and pixel structures, where the second pixel electrode has a greater spacing or quantity of bars compared to the first pixel electrode, and a light shielding pattern layer with larger areas, ensuring uniform brightness distribution and preventing dot mura.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light shielding patterns are added to prevent light leakage, then light leakage is reduced, but aperture ratio is lowered
Solution Approach 1:
The patent applies different light shielding pattern designs to different regions of the display panel. Specifically, the first light shielding portion is positioned closer to the first pixel electrode with smaller aperture ratio, while the second light shielding portion is positioned closer to the second pixel electrode with larger aperture ratio. This local differentiation allows each region to have optimized light shielding without uniformly reducing the overall aperture ratio.
Solution Approach 2:
The patent changes the parameters of light shielding patterns by adjusting the size and position of light shielding portions. The first light shielding portion has a first size and the second light shielding portion has a second size, with their positions and dimensions specifically optimized to compensate for aperture ratio differences between adjacent pixel electrodes, thereby preventing dot mura while maintaining high aperture ratio.
2Object-affected harmful factors
If light shielding patterns of different sizes are used for different positions, then light leakage is controlled, but uniformity of brightness distribution deteriorates
Solution Approach 1:
The patent implements local quality by designing different light shielding patterns for different pixel regions. The first light shielding portion is configured for the first pixel electrode region, and the second light shielding portion is configured for the second pixel electrode region. This allows each region to have light shielding optimized for its specific aperture ratio characteristics, achieving both light leakage control and uniform brightness distribution.
Solution Approach 2:
The patent applies preliminary anti-action by pre-compensating for the potential dot mura effect through carefully designed light shielding patterns. The sizes and positions of the light shielding portions are predetermined to counterbalance the aperture ratio differences between adjacent pixels, preventing brightness non-uniformity before it occurs during display operation.
Data Source
AI summary
A display panel including first and second pixel structures and a light shielding pattern layer is provided. The first pixel structure includes a first pixel electrode including first pixel electrode bars, wherein a first maximum spacing is formed between any two adjacent first pixel electrode bars of the first pixel structure. The second pixel structure includes a second pixel electrode including second pixel electrode bars, wherein a second maximum spacing which is larger than the first maximum spacing is formed between two adjacent second pixel electrode bars of the second pixel structure. The light shielding pattern layer has first and second light shielding portions. The area of the second light shielding portion is larger than the area of the first light shielding portion. The first pixel electrode is close to the second light shielding portion and the second pixel electrode is away from the second light shielding portion.