Alternating Black Matrix Shelters for Uniform Display Brightness
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Solution Overview
Problem
Existing array substrates face issues with pixel display differences when displaying low gray scale images, leading to phenomena like periodic vertical stripes, due to differences in black matrix widths affecting aperture ratio and brightness distribution.
Innovation Solution
The array substrate design includes a black matrix with alternating first and second shelters of different widths, aligned in specific patterns across sub-pixel rows to maintain aperture ratio while reducing brightness distribution differences, thereby avoiding pixel display differences during low gray scale image display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If uniform black matrix width is used across all sub-pixel rows, then manufacturing is simplified, but brightness distribution becomes non-uniform causing pixel display differences
Solution Approach 1:
The patent applies local quality by differentiating black matrix widths based on specific positional requirements. First shelters have a first width while second shelters have a second width, with the width ratio configured according to sub-pixel color characteristics. This local differentiation compensates for brightness distribution non-uniformity caused by transparent electrode overlap, achieving uniform visual display without complicating the overall manufacturing process.
2Manufacturing precision
If black matrix width is increased to reduce brightness differences, then brightness distribution uniformity improves, but aperture ratio decreases
Solution Approach 1:
The patent avoids uniform increase of black matrix width by implementing localized width differentiation. First shelters (covering transparent electrodes) have a first width while second shelters have a second width, with the ratio configured to compensate for brightness non-uniformity. This approach achieves brightness uniformity without proportionally increasing the overall black matrix area, thereby preserving a higher aperture ratio compared to uniform width designs.
Solution Approach 2:
The patent employs parameter changes by configuring the width ratio of first and second shelters according to specific design parameters. The first width and second width are set with a specific ratio relationship that compensates for brightness distribution characteristics of different sub-pixel colors, optimizing both brightness uniformity and aperture ratio through parameter optimization rather than simple width increase.
3Manufacturing precision
If different black matrix widths are used to compensate for brightness differences, then brightness distribution uniformity improves, but device complexity increases
Solution Approach 1:
The patent implements local quality with a practical approach: first shelters have a first width and second shelters have a second width, with clear width ratio configurations. This localized differentiation targets specific brightness compensation needs without creating excessive structural complexity. The alternating arrangement pattern provides systematic simplicity while achieving the brightness uniformity goal.
Solution Approach 2:
The patent merges the brightness compensation function into the black matrix structure itself by integrating width differentiation directly into the shelter design. The first and second shelters with different widths are alternately arranged to simultaneously achieve brightness compensation and structural organization, combining multiple functions into a unified structure rather than adding separate compensation mechanisms.
Data Source
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AI summary
The embodiments of the present disclosure provide an array substrate. The array substrate includes a plurality of pixel groups arranged along a column direction. Each of the plurality of pixel groups includes a plurality of sub-pixel rows. Each sub-pixel row includes a plurality of sub-pixels, a first shelter or a second shelter is arranged between two adjacent sub-pixels, and the first shelter and the second shelter are arranged alternately. The first shelter has a first width, and the second shelter has a second width. For each pixel group, the first shelters on at least one of the sub-pixel rows are aligned with the second shelters on at least one of other sub-pixel rows. According to the embodiment of the present disclosure, pixel display difference in shading can be avoided in case of low gray scale, without reducing an aperture ratio.