Non-Uniform Black Matrix Layout for Display Color Accuracy
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Solution Overview
Problem
Conventional display panels suffer from light leakage and color shifting issues, particularly when viewed from angles, leading to reduced color accuracy and image quality, especially in compact optical assemblies like head-mounted displays.
Innovation Solution
A display panel with a non-uniform black matrix arrangement, where the relative positions of black matrix components differ between central and peripheral regions to control light paths and prevent unwanted light leakage and color mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a uniform black matrix arrangement is used in conventional display panels, then the manufacturing process is simple and consistent, but light leakage occurs between adjacent sub-pixels when viewed from angles, causing color shifting and reduced color accuracy
Solution Approach 1:
The patent applies local quality by differentiating the black matrix arrangement between central and peripheral regions. In the central region, the black matrix components are positioned to optimize for direct viewing, while in the peripheral region, the black matrix components are shifted to compensate for angular viewing effects. This localized differentiation ensures that each region's black matrix configuration is optimized for its specific viewing characteristics, thereby improving color accuracy across the entire display panel without requiring a completely complex global redesign.
Solution Approach 2:
The patent segments the display panel into central and peripheral regions with distinct black matrix arrangements. By dividing the display area and applying different black matrix positioning strategies to each segment, the patent addresses the angular light leakage problem in peripheral regions without affecting the optimal performance of the central region. This segmentation allows for targeted optimization of color accuracy in different viewing zones.
2Volume of moving object
If the display panel is used in compact optical assemblies with steep viewing angles, then the device size is reduced, but light leakage increases significantly, causing severe color shifting at edges and corners
Solution Approach 1:
The patent addresses the light leakage issue in compact optical assemblies by applying local quality to the peripheral region black matrix arrangement. The black matrix components in peripheral regions are specifically positioned to block light paths that travel at steep angles, which are the primary cause of light leakage in compact devices. This localized adjustment ensures that even when the device is small and forces steep viewing angles, the peripheral black matrix configuration compensates by blocking the specific angular light paths that would otherwise cause color shifting.
3Ease of manufacture
If conventional uniform black matrix components are used, then the structure is simple and consistent, but color accuracy deteriorates at edges and corners when observed from angles
Solution Approach 1:
The patent resolves the contradiction between manufacturing simplicity and color uniformity by implementing local quality. The black matrix fabrication process remains relatively simple and consistent, but the pattern design is locally optimized: central regions use a standard uniform pattern for ease of manufacture, while peripheral regions use a modified pattern with adjusted component positions to correct angular viewing errors. This approach maintains manufacturing simplicity while achieving color uniformity across the entire display.
Data Source
AI summary
Disclosed is a display panel with an array of pixels, each pixel having at least three sub-pixels; and a black matrix having a plurality of black matrix components, each black matrix component being arranged to form a boundary between two corresponding sub-pixels; wherein a relative position of a first black matrix component with respect to first two corresponding sub-pixels located in a central region of said array is different from a relative position of a second black matrix component with respect to second two corresponding sub-pixels located in a peripheral region of the array.