Display Substrate Light Processing Structure for Pixel Crosstalk
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Solution Overview
Problem
The increasing pixel density in display screens leads to optical crosstalk between adjacent sub-pixel units due to the reduced distance between them, causing color mixing.
Innovation Solution
A display substrate with a light processing structure, such as a metasurface structure, is employed to prevent light rays exceeding a critical angle from being emitted from the cover plate, thereby reducing optical crosstalk by ensuring total reflection within the cover plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the distance between pixels is reduced to increase display density, then the pixels per inch (PPI) increases, but optical crosstalk between adjacent pixels occurs
Solution Approach 1:
A light blocking structure is introduced as an intermediary element between adjacent sub-pixel units. This structure selectively blocks oblique light rays that would otherwise cause optical crosstalk, while allowing normal viewing light to pass through. The light blocking structure acts as a mediator that resolves the conflict between high pixel density and optical isolation.
Solution Approach 2:
The light blocking structure is positioned specifically at the boundaries between adjacent sub-pixel units, where optical crosstalk occurs. By applying the light blocking function locally at these critical interfaces rather than uniformly across the entire display, the patent achieves optical isolation precisely where needed while maintaining overall display brightness and quality.
2Area of stationary object
If color filter units are closely arranged to increase display density, then the area occupied by color filters increases, but light leaks from adjacent color filter units causing color mixing
Solution Approach 1:
The light blocking structure serves as an intermediary barrier between closely spaced color filter units. It blocks oblique light rays that leak from adjacent color filter units, preventing color mixing while allowing the color filters to be closely arranged for high display density.
Solution Approach 2:
The light blocking structure is divided into multiple segments corresponding to different sub-pixel units. Each segment is positioned to block light leakage from its adjacent color filter units, creating a segmented approach to light isolation that maintains the close arrangement of color filters while preventing light mixing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The light processing structure effectively prevents light leakage between adjacent sub-pixel units, minimizing optical crosstalk and maintaining display quality.
Implementation Method 1
The light processing structure is configured to prevent light rays emitted from the plurality of sub-pixel units and having an angle greater than a critical angle of total reflection of the cover plate from being emitted from the cover plate
Data Source
AI summary
The display substrate includes: a substrate, a plurality of pixel units at a side of the substrate, a color filter layer at a light emergent side of the pixel units, a light processing structure, and a cover plate at a side of the color filter layer facing away from the substrate. Each of the pixel units includes a plurality of sub-pixel units. The color filter layer includes a plurality of color filter units arranged in one-to-one correspondence to the sub-pixel units. The color filter units are closely arranged. An orthographic projection of the light processing structure on the substrate covers a junction of the color filter units of different colors. The light processing structure is configured to prevent light rays emitted from the sub-pixel units and having an angle greater than a critical angle of total reflection of the cover plate from being emitted from the cover plate.