Color Filter Substrate End Portion Array for Non-Rectangular Displays
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Solution Overview
Problem
Existing color image display devices with non-rectangular image display regions face challenges in maintaining color balance due to differences in light exposure areas between inner and end portion sub-pixels, particularly when the display region is circular or elliptical, as existing solutions struggle to accommodate varying shapes and areas of sub-pixels effectively.
Innovation Solution
The solution involves configuring end portion unit pixels with sub-pixels that have a relative area proportion equal to inner sub-pixels, with their array direction intersecting that of the inner sub-pixels, and adjusting the width and shape of the black matrix to ensure equal color development across the display region, thereby maintaining color balance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the image display region is made circular or non-rectangular, then the display device can be mounted on various apparatuses with different shapes, but the color balance is disturbed due to differences in light exposure area between inner and end portion sub-pixels
Solution Approach 1:
The patent applies local quality by making the array direction of end portion sub-pixels different from that of inner sub-pixels. Specifically, end portion sub-pixels are arranged in a direction parallel to the outer edge of the display region, while inner sub-pixels maintain a regular grid arrangement. This local differentiation ensures that each sub-pixel region receives appropriate light exposure according to its specific position and orientation, thereby maintaining color balance throughout the non-rectangular display region.
2Manufacturing precision
If the width of black matrix is adjusted to maintain color balance, then end portion sub-pixels can have equal area proportion, but the array direction of end portion sub-pixels must be changed from regular grid pattern
Solution Approach 1:
The patent segments the sub-pixels into two distinct groups: inner sub-pixels and end portion sub-pixels. Each group is assigned a specific array direction - inner sub-pixels follow a regular grid pattern while end portion sub-pixels are oriented parallel to the outer edge. This segmentation allows each region to be optimized independently for its specific geometric constraints, achieving color balance without requiring complete redesign of the entire pixel array.
3Shape
If end portion sub-pixels are mostly covered with light-shielding layer, then non-rectangular display region can be formed, but color balance cannot be maintained
Solution Approach 1:
The patent introduces asymmetry in the array direction of end portion sub-pixels compared to inner sub-pixels. While inner sub-pixels maintain a regular grid arrangement, end portion sub-pixels are oriented asymmetrically parallel to the outer edge of the display region. This asymmetric arrangement, combined with adjusted black matrix width, ensures that sub-pixels in the end portion regions receive appropriate light exposure despite being covered by the light-shielding layer, thereby maintaining color balance in the non-rectangular display region.
Data Source
AI summary
Provided is a color filter substrate including: an end portion unit pixel including a plurality of kinds of end portion sub-pixels which correspond to a plurality of kinds of primary colors respectively in a one-to-one relationship; and an inner unit pixel including a plurality of kinds of inner sub-pixels which correspond to the plurality of kinds of primary colors respectively in a one-to-one relationship, wherein a relative area proportion of the end portion sub-pixels is set equal to that of the inner sub-pixels; and wherein the plurality of kinds of the end portion sub-pixels is arrayed in accordance with a position or a shape on an outer edge of the display region, an array direction of the plurality of kinds of the end portion sub-pixels and an array direction of the plurality of kinds of the inner sub-pixels configured to intersect each other.