Array Base Plate Light Shielding for LCD Flicker Reduction
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Solution Overview
Problem
High-pixel-density liquid-crystal displays experience significant illumination leakage current due to backlight brightness, leading to flicker phenomena that degrade display quality.
Innovation Solution
An array base plate with a light shielding layer that covers specific parts of the semiconductor and grid layers, reducing the generation of hole-electron pairs and thus minimizing leakage current, is integrated into the liquid-crystal display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If high pixel density and high brightness are implemented, then display quality is improved, but illumination leakage current increases causing flicker
Solution Approach 1:
The patent applies the light shielding layer to block harmful light rays from reaching the semiconductor layer, converting the harmful illumination effect into a controlled scenario where only necessary light passes through, thereby reducing leakage current while maintaining display brightness
Solution Approach 2:
The light shielding layer is selectively positioned to cover only specific regions (semiconductor layer and grid layer) rather than the entire display, providing localized protection against illumination-induced leakage current while preserving overall display quality
2Measurement precision
If screen size is reduced for high definition, then resolution is improved, but illumination leakage current becomes more serious
Solution Approach 1:
The light shielding layer is selectively positioned to cover only the semiconductor layer and grid layer regions, providing localized protection against illumination-induced leakage current while preserving overall display quality and resolution
Solution Approach 2:
By blocking harmful light rays from reaching the semiconductor layer, the light shielding layer converts the harmful illumination effect into a controlled scenario, reducing leakage current while maintaining the high resolution achieved through reduced screen size
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 solution effectively reduces illumination leakage current, mitigating flicker issues and enhancing display quality by blocking light rays that contribute to parasitic capacitance and leakage current in high-PPI products.
Implementation Method 1
a light shielding layer, a semiconductor layer, a grid layer, a source-drain layer and a pixel electrode layer that are arranged in layer configuration on the substrate sequentially
Data Source
AI summary
The array base plate includes a plurality of sub-pixels that are arranged in an array; each of the sub-pixels includes a light shielding layer, a semiconductor layer, a grid layer, a source-drain layer and a pixel electrode layer that are arranged in layer configuration on the substrate sequentially; the semiconductor layer includes a first contacting part, a first channel part, a doping part, a second channel part and a second contacting part that are sequentially connected; the grid layer includes a first grid electrode and a second grid electrode; the source-drain layer includes a first electrode and a second electrode; and an orthographic projection of the light shielding layer on the substrate at least covers orthographic projections on the substrate of the first channel part, the second channel part and a part of the first contacting part.