Color Filter Protruding Patterns for Display Misalignment
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Solution Overview
Problem
Color shift phenomena occur in flat-panel displays due to misalignment between color filters and active device array substrates, and when viewed at large angles, leading to undesirable color representation.
Innovation Solution
A color filter design featuring alternating protruding patterns between adjacent pixel regions, where one pattern partially overlaps the other, ensuring that the color representation remains accurate even at large viewing angles and during substrate misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If color filter patterns are strictly aligned with pixel structures, then manufacturing precision is improved, but device complexity increases due to stricter assembly requirements
Solution Approach 1:
The color filter pattern is segmented into a central pattern and multiple protruding patterns. The protruding patterns extend into adjacent pixel regions, creating overlapping regions that provide alignment tolerance. This segmentation allows the color filter to maintain accurate color representation even when assembly misalignment occurs, as the protruding patterns ensure that each pixel structure always has access to its corresponding color filter pattern.
Solution Approach 2:
The protruding patterns are designed in advance to extend into adjacent pixel regions, creating a buffer zone before misalignment occurs. This preliminary geometric configuration ensures that even if assembly misalignment happens, the color filter patterns remain accessible to the correct pixel structures, preventing color shift without requiring complex real-time adjustment mechanisms.
2Adaptability or versatility
If color filter patterns are viewed at large angles, then viewing angle coverage is improved, but color accuracy deteriorates due to color shift phenomenon
Solution Approach 1:
The color filter pattern extends in the spatial dimension by adding protruding patterns that overlap into adjacent pixel regions. This dimensional extension creates a buffer zone that compensates for angular viewing effects. When viewed at large angles, the overlapping regions ensure that light still passes through the correct color filter pattern, maintaining color accuracy across a wider viewing angle range.
3Reliability
If protruding patterns are added to color filter, then alignment tolerance is improved, but manufacturing complexity increases
Solution Approach 1:
The color filter pattern is divided into a central pattern and protruding patterns. This segmentation allows the protruding patterns to extend into adjacent pixel regions, creating overlapping regions that provide alignment tolerance. The segmented design ensures that even with increased pattern complexity, each portion serves a specific function in maintaining color accuracy.
Solution Approach 2:
The protruding patterns are strategically positioned at specific locations where misalignment is most likely to occur. By concentrating the complexity only where needed rather than uniformly across the entire color filter, the design achieves improved alignment tolerance with minimal increase in overall manufacturing complexity.
Data Source
AI summary
A color filter includes a substrate, a first color filter pattern and a second color filter pattern. The substrate has at least one first pixel region and at least one second pixel region adjacent to the first pixel region. The first color filter pattern is disposed on the substrate and includes a first central pattern and first protruding patterns connected to the first central pattern and protruding outwardly from the first central pattern so that a portion of the first protruding patterns are located in the second pixel region. The second color filter pattern includes a second central pattern located within the second pixel region.