Array Substrate Through Holes for Capacitance and Leakage Control
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Solution Overview
Problem
The integration of touch panels with liquid crystal displays in thinner and lighter devices leads to issues due to electric leakage caused by added electrodes and insulation layers, resulting in reduced construction space and display problems.
Innovation Solution
A manufacture method for an array substrate that increases capacitance by forming through holes in the second insulation layer, allowing the second common electrode layer to be deposited inside these holes, thereby reducing the thickness of the insulation layers and minimizing electric leakage issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If touch panel integration is implemented with additional electrodes and insulation layers, then touch functionality is achieved, but construction space decreases and electric leakage issues occur
Solution Approach 1:
The patent merges the touch panel electrodes with the liquid crystal display common electrodes, making them coincide in position and function. This integration eliminates the need for separate touch electrodes and insulation layers, thereby achieving touch functionality while maintaining construction space and avoiding electric leakage issues associated with additional layers
2Reliability
If insulation layer thickness is increased to prevent electric leakage, then reliability improves, but capacitance volume decreases
Solution Approach 1:
The patent applies different insulation layer thicknesses at different locations: the insulation layer between the common electrode and electrode substrate is made thin (50-200nm) to increase capacitance volume, while the insulation layer between the common electrode and pixel electrode is maintained at normal thickness to prevent electric leakage. This local differentiation resolves the contradiction between reliability and capacitance volume
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
This approach enhances storage and parasitic capacitance, effectively reducing display issues related to electric leakage and improving the overall performance of liquid crystal panels and display screens.
Implementation Method 1
removing the photoresist layer with acetone reagent
Implementation Method 2
depositing the electrode layer on the photoresist layer
Data Source
AI summary
The present application provides a manufacture method of an array substrate, wherein the manufacture method comprises providing a substrate; sequentially forming a planarization layer, a first common electrode layer and a first insulation layer on the substrate; forming a metal line layer on the first insulation layer; depositing a second insulation layer on a second metal layer and the first insulation layer; forming a plurality of through holes in the second insulation layer; forming a second common electrode layer on the second insulation layer which is formed with the through holes. The present application further provides a liquid crystal panel and a liquid crystal display screen.