Array Substrate Metal Platform Layout for LCD Light Leakage
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Solution Overview
Problem
The issue of light leakage and reduced display quality in liquid crystal display (LCD) devices due to spacers getting stuck in gaps between gate and common electrode lines, leading to deformation of the opposite substrate and photoelastic effects.
Innovation Solution
Incorporating metal platforms on the array substrate that overlap with spacers to prevent them from getting stuck in gaps between gate and common electrode lines, ensuring the spacers remain aligned even when deformed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If spacers are placed between gate and common electrode lines to maintain cell gap, then cell gap uniformity is improved, but spacers get stuck in gaps causing substrate deformation and light leakage
Solution Approach 1:
The patent introduces metal platforms as intermediary structures between the spacers and the gate/common electrode lines. These metal platforms serve as mediators that prevent spacers from getting stuck in the gaps between conductive lines, thereby eliminating the harmful photoelastic effects while maintaining cell gap uniformity. The metal platforms are positioned at specific locations where spacers are placed, creating a stable interface that prevents spacer deformation.
2Reliability
If metal platforms are added to prevent spacer deformation, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent merges the metal platforms with the existing gate and common electrode lines by forming them as an integrated conductive structure. The metal platforms are electrically connected to the gate lines and common electrode lines, combining multiple functions into a single integrated structure. This merging approach adds the necessary functionality to prevent spacer deformation while minimizing the increase in device complexity.
Solution Approach 2:
The patent applies metal platforms only at specific local positions where spacers are placed between gate and common electrode lines, rather than uniformly across the entire display panel. This localized application ensures that the metal platforms are added only where necessary to prevent spacer deformation, minimizing the overall impact on device complexity while maintaining display quality.
3Stability of the object's composition
If spacer size is increased to improve alignment, then spacer stability is improved, but light leakage increases due to substrate deformation
Solution Approach 1:
The metal platforms act as intermediaries that support the spacers and prevent them from getting stuck in gaps between conductive lines. This intermediary structure allows spacers to maintain proper alignment and stability without causing substrate deformation, thereby preventing light leakage while maintaining spacer alignment.
Data Source
AI summary
An array substrate includes a first base substrate, a plurality of gate lines and at least one metal platform. The plurality of gate lines are disposed on the first base substrate and extend in a first direction. The at least one metal platform is disposed on the first base substrate. A metal platform of the at least one metal platform is integrated with a corresponding gate line of the plurality of gate lines, and the metal platform includes a first protrusion and a second protrusion that are arranged on both sides of the corresponding gate line along a second direction, respectively, where the first direction intersects the second direction.