LCD Array Substrate with Supplementary Slit Angles
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Solution Overview
Problem
Liquid Crystal Displays (LCDs) with single-domain pixel structures suffer from chromatic aberration and decreased contrast at large viewing angles, while double-domain structures can inhibit these issues but experience disordered liquid crystal alignment and dark stripe areas due to disturbed electric fields at pixel electrode corners.
Innovation Solution
An array substrate with first and second subpixels arranged in rows and columns, each having pixel electrodes with slits angled at supplementary tilt angles relative to the gate line direction, preventing chromatic aberration and dark stripe areas by ensuring brightness values are supplementary, thus inhibiting horizontal and longitudinal stripes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-domain pixel structure is used, then the pixel electrode can be angled by merely one angle, but chromatic aberration and decreased contrast at large viewing angles occur
Solution Approach 1:
The pixel electrode is segmented into multiple domains with different tilt angles. Each domain has its pixel electrode angled at a different angle relative to the gate line extension direction, creating multiple light emission directions that collectively improve viewing angle performance and contrast while maintaining manageable structural complexity
Solution Approach 2:
Adjacent pixels are designed with asymmetric tilt angle configurations. Specifically, the tilt angle of a pixel electrode in one pixel is set to be supplementary to the tilt angle of the pixel electrode in the adjacent pixel, creating an asymmetric pattern that balances light distribution and eliminates horizontal stripe defects across the display
2Illumination intensity
If a double-domain structure is used, then chromatic aberration and contrast issues are inhibited, but disordered liquid crystal alignment and dark stripe areas occur due to disturbed electric fields at pixel electrode corners
Solution Approach 1:
Different regions of the pixel electrode are assigned different tilt angles based on their local position. Pixels at different locations in the array have differently oriented pixel electrodes, with each pixel's tilt angle configured to compensate for local defects and ensure uniform liquid crystal alignment across the entire display area
Solution Approach 2:
The asymmetric arrangement of tilt angles between adjacent pixels creates complementary electric field distributions that prevent the formation of dark stripe areas. By making the tilt angle of one pixel supplementary to its neighbor, the electric field disturbances at pixel corners are balanced and canceled out, ensuring reliable liquid crystal alignment
3Ease of manufacture
If subpixels with the same tilt angle are arranged adjacent to each other, then manufacturing is simplified, but horizontal and longitudinal stripes appear due to non-supplementary brightness values
Solution Approach 1:
Instead of using the same tilt angle for all pixels (which would be simpler to manufacture), the invention introduces asymmetric tilt angle variations where adjacent pixels have supplementary angles. This asymmetric configuration creates complementary brightness distributions that cancel out stripe artifacts while remaining compatible with standard manufacturing processes
Solution Approach 2:
The tilt angle parameter is systematically varied across different pixel locations rather than being kept constant. By changing the tilt angle parameter in a controlled asymmetric pattern, the invention maintains manufacturing feasibility while achieving uniform brightness distribution and eliminating stripe defects
Data Source
AI summary
An array substrate, a manufacturing method and a display device are provided in the present disclosure. The array substrate includes first subpixels and second subpixels arranged in rows and columns, each first subpixel includes a first pixel electrode provided with a plurality of first slits arranged parallel to each other, each second subpixel includes a second pixel electrode provided with a plurality of second slits arranged parallel to each other, each first slit is angled at a first tilt angle relative to a reference direction, each second slit is angled at a second tilt angle relative to the reference direction, the first tilt angle is supplementary to the second tilt angle, and the reference direction is an extension direction of each gate line of the array substrate. At least one first subpixel and at least one second subpixel are arranged in each row, and/or at least one first subpixel and at least one second subpixel are arranged in each column.