Display Panel Electrode Repair Using Transparent Conductive Patches
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Solution Overview
Problem
Liquid crystal display panels face issues with poor adhesion of foreign matter, leading to electrode layer defects and alignment problems, resulting in subpar display image quality and increased production scraps.
Innovation Solution
A display panel with a substrate and electrode layer featuring a transparent conductive patch layer made from colloidal materials like indium oxide, tin oxide, or zinc oxide, which are used to patch defects and improve adhesion, combined with photoresist layers for precise alignment and repair.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If foreign matter is adhered to the substrate after photo spacer setting, then the adhesion between foreign matter and substrate is poor, but the removal of foreign matter peels off the electrode layer to cause defects
Solution Approach 1:
The patent applies preliminary action by forming a protective coating layer on the electrode layer before the foreign matter adhesion step. This pre-established protective layer prevents the electrode layer from peeling off during subsequent foreign matter removal, thus maintaining electrode layer integrity while allowing adhesion repair
Solution Approach 2:
The protective coating layer acts as an intermediary between the foreign matter and the electrode layer. It provides a buffer that allows foreign matter to be removed without directly damaging the electrode layer, thus resolving the contradiction between adhesion quality and electrode layer integrity
2Reliability
If the electrode layer has defects, then the liquid crystal in the vicinity cannot operate normally, but patching defects reduces display image quality
Solution Approach 1:
The patent applies local quality by using transparent conductive material for patching that matches the optical and electrical properties of the original electrode layer. This localized repair maintains both liquid crystal operation and display image quality by making the patch indistinguishable from the surrounding area
Solution Approach 2:
The patent changes the physical and chemical parameters of the patching material to match the electrode layer parameters (transparency, conductivity, thickness). By adjusting these parameters, the patch restores liquid crystal operation while maintaining display image quality
3Manufacturing precision
If photo spacer is set for alignment, then alignment issues occur, but repair attempts increase production complexity
Solution Approach 1:
The patent applies preliminary action by establishing a protective coating layer and transparent conductive patch layer before alignment issues occur. This pre-prepared structure allows for easier repair of alignment problems without increasing production complexity, as the protective layers are already in place to facilitate subsequent repairs
Data Source
AI summary
A display panel and a method of manufacturing the same are provided. The display panel includes a substrate and an electrode layer. The electrode layer is disposed on the substrate. The electrode layer is provided with a first defect seat and a transparent conductive patch layer. The transparent conductive patch layer overlies the first defect seat.