Array Substrate Light Shield for Gate-Common Electrode Gap Leakage
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Solution Overview
Problem
Liquid crystal display panels face light leakage issues due to gaps between gate and common electrode lines, which conventional black matrices often fail to block effectively, leading to reduced aperture ratios.
Innovation Solution
Incorporating a light shield that partially or fully covers the gap between the gate and common electrode lines on the array substrate, which can be positioned above or below the gap, to prevent light leakage while minimizing impact on the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a black matrix with larger area is used to prevent light leakage, then light leakage is reduced, but the aperture ratio is reduced
Solution Approach 1:
The patent applies local quality by placing light shields specifically at the gap regions between gate lines and common electrode lines, rather than using a uniform black matrix across the entire display area. This localized approach blocks light leakage only where it occurs most severely, preserving the aperture ratio in other regions.
Solution Approach 2:
The light shielding function is segmented into multiple discrete light shield structures positioned at critical gap locations, rather than using a single continuous black matrix. This segmentation allows light shielding at specific problem areas while maintaining open aperture in other regions.
2Object-affected harmful factors
If the gap between gate line and common electrode line is reduced, then light leakage path is shortened, but manufacturing precision requirements increase
Solution Approach 1:
The light shield acts as an intermediary element inserted into the gap between the gate line and common electrode line. This mediator blocks the light leakage path without requiring the gap itself to be reduced, thereby avoiding increased manufacturing precision requirements while still achieving light leakage prevention.
3Object-affected harmful factors
If a light shield is added to block light leakage, then light leakage is reduced, but device complexity increases
Solution Approach 1:
The light shield is merged with existing electrode structures by forming it as an extension or integration of the gate line or common electrode line in some embodiments. This combining approach adds light shielding functionality without significantly increasing overall device complexity, as it utilizes existing structural elements.
Data Source
AI summary
The present application discloses an array substrate comprising a base substrate, a row of a plurality of pixel units, and a first gate line and a first common electrode line adjacent to the row of the plurality of pixel units and on a first side of the row of the plurality of pixel units in plan view of the array substrate. The first gate line and the first common electrode line are spaced apart by a gap; and a light shield at least partially covering the gap for reducing light leakage from the gap.