Curved Display Array Substrate Asymmetric Electrode Design
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Solution Overview
Problem
Curved liquid crystal display panels experience light leakage and color mixture due to uneven liquid crystal deflections and transmittance when curved under external force, resulting in poor visual effects and image quality.
Innovation Solution
An array substrate with pixel units arranged in a matrix, where each pixel unit includes at least two sub-pixel units with identical pixel electrodes and common electrodes, and different structures for electrodes in adjacent units, symmetrically arranged relative to a central axis, maintaining structural symmetry even when curved.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a plane liquid crystal display panel is curved under external force to generate a curved structure, then the curved display structure is achieved, but the pixel transparent regions of the color filter substrate move significantly with respect to the corresponding pixel electrodes on the array substrate, causing light leakage and color mixture
Solution Approach 1:
The patent applies asymmetry by designing different slit structures for pixel electrodes in different pixel units. Specifically, pixel electrodes in pixel units located in a first region have slits inclined at a first angle, while pixel electrodes in pixel units located in a second region have slits inclined at a second angle that is different from the first angle. This asymmetric design compensates for the differential movement of color filter substrate regions relative to array substrate regions when curved, thereby reducing light leakage and color mixture caused by misalignment.
2Illumination intensity
If pixel electrodes are designed into a double-domain structure having inclined slits to achieve wide viewing angle and high transmittance, then viewing angle and transmittance are improved, but liquid crystals at the central and edge regions generate disordered deflections, resulting in dark fringe regions and uneven transmittance
Solution Approach 1:
The patent applies local quality by making the slit structures location-dependent. Pixel electrodes in different regions of the display panel have slits with different inclination angles tailored to the specific requirements of each region. This allows the liquid crystal deflections to be controlled uniformly across different regions, eliminating dark fringe regions while maintaining high transmittance and wide viewing angle.
3Object-affected harmful factors
If the black matrix width is increased to compensate for light leakage and color mixture in curved panels, then light leakage is reduced, but the aperture ratio and transmittance of the liquid crystal display panel are decreased
Solution Approach 1:
The patent applies parameter changes by modifying the slit inclination angles of pixel electrodes based on their location. Instead of increasing the black matrix width, the invention changes the electrical and optical parameters (slit angles) of the pixel electrodes to control liquid crystal deflections differently in different regions. This compensates for light leakage and color mixture while maintaining high aperture ratio and transmittance.
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
This configuration ensures even transmittance and brightness across the panel, improving visual effects and image quality by minimizing light leakage and color mixture during curvature.
Implementation Method 1
the liquid crystals at the central and edge regions of the pixel electrode may generate disordered deflections
Implementation Method 2
the liquid crystal display panel is subjected to severe light leakage and color mixture
Data Source
AI summary
An array substrate, a curved display panel and a curved display device are provided, to improve visual effect and image quality of the display panel being curved by external force. The array substrate includes multiple pixel units arranged in a matrix, each pixel unit comprises at least two sub-pixel units, and each sub-pixel unit is provided with a pixel electrode and a common electrode. The pixel electrodes and/or the common electrodes in an identical pixel unit have an identical structure, and the pixel electrodes or the common electrodes in different pixel units have at least two structures. The pixel electrodes or the common electrodes are symmetrically arranged relative to a central axis of the array substrate. The central axis is a straight line located in the center of the array substrate and extending in a direction parallel to the array substrate, and an extending direction of the central axis does not change when the array substrate is curved.