Dot Pattern Light Blocking for LCD Spacer Leakage
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Solution Overview
Problem
In liquid crystal display panels, columnar spacers can lead to reduced usable image display area and lower contrast due to light leakage, affecting display quality.
Innovation Solution
The implementation of dot patterns with light-blocking properties on the array substrate, including projection portions that form dot patterns and locate columnar spacers within these patterns, helps maintain alignment and prevent light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If columnar spacers are formed to maintain the gap between substrates, then the gap uniformity is improved, but the usable image display area becomes narrower and light leakage occurs
Solution Approach 1:
The patent applies local quality by forming dot patterns with light-blocking properties at specific locations where columnar spacers are positioned. This creates localized light-blocking regions only where needed (at spacer positions) while leaving the rest of the pixel area unaffected, thus maintaining gap uniformity without significantly reducing the usable image display area.
Solution Approach 2:
The dot patterns serve as an intermediary element between the columnar spacers and the liquid crystal molecules. These dot patterns prevent light leakage from the spacers by providing a light-blocking layer, while the liquid crystal molecules are positioned between the dot patterns to maintain proper alignment and spacing.
2Stability of the object's composition
If columnar spacers are formed to maintain the gap between substrates, then the gap uniformity is improved, but light leakage occurs and contrast ratio lowers
Solution Approach 1:
The patent applies local quality by forming dot patterns with light-blocking properties at specific locations where columnar spacers are positioned. This creates localized light-blocking regions only where needed (at spacer positions) to prevent light leakage, while leaving the rest of the pixel area unaffected.
Solution Approach 2:
The patent converts the harmful light leakage effect into a beneficial solution by using the same columnar spacers that cause light leakage as positioning markers for the dot patterns. The dot patterns are formed at spacer positions, transforming the problematic light leakage regions into controlled light-blocking regions that actually improve display quality.
3Object-generated harmful factors
If dot patterns with light-blocking properties are formed to prevent light leakage, then display quality is improved, but the device complexity increases
Solution Approach 1:
The patent merges the light-blocking function with the existing pixel structure by forming dot patterns using the same manufacturing processes as the color filter and black matrix layers. This integration approach adds minimal complexity while achieving effective light leakage suppression at the spacer positions.
Data Source
AI summary
According to one embodiment, a liquid crystal display panel includes an array substrate, a counter-substrate, a liquid crystal layer and a columnar spacer. The array substrate includes a wiring including projection portion which form a dot pattern with light-blocking properties, and a first horizontal alignment film. The counter-substrate includes a second horizontal alignment film. The columnar spacer is disposed between the array substrate and the counter-substrate and is located within the dot pattern.