HVA Pixel Electrode Fishbone Insulating Structure
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Solution Overview
Problem
The existing manufacturing methods for High Vertical Alignment (HVA) pixel electrodes in liquid crystal display panels result in poor controllability of the electric field and liquid crystal molecules, leading to dark strips and reduced light transmittance efficiency due to the Fine Slit structure without pixel electrodes in slit parts.
Innovation Solution
A method involving the deposition and patterning of metal and insulating materials to form a fishbone-shaped insulating structure with protrusions and grooves, where the transparent conductive layer covers the entire opening area, improving controllability and light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a Fine Slit structure is used for HVA pixel electrode, then the manufacturing process is simplified, but the controllability of electric field and liquid crystal molecules deteriorates, causing dark strips and reduced light transmittance
Solution Approach 1:
The pixel electrode is segmented into multiple transparent conductive layers (first transparent conductive layer and second transparent conductive layer) separated by an insulating layer. This segmentation allows each layer to contribute to electric field control in different regions, eliminating the dark strip problem while maintaining manufacturing simplicity through the Fine Slit structure.
Solution Approach 2:
The patent introduces a vertical dimension by stacking transparent conductive layers in the thickness direction, separated by an insulating layer. This multi-layer vertical structure enhances electric field controllability in the slit regions without complicating the planar manufacturing process, thus resolving the contradiction between manufacturing ease and field control reliability.
2Ease of manufacture
If pixel electrodes are not arranged in slit parts, then the manufacturing process is easier, but light transmittance efficiency and penetration are reduced
Solution Approach 1:
The transparent conductive layer is segmented into regions with and without pixel electrode patterns. The first transparent conductive layer extends into the slit regions while the second layer forms the pixel electrode patterns in non-slit regions. This segmentation allows light transmission through slit areas via the first layer while maintaining proper pixel electrode functionality in other areas through the second layer, thus improving overall light transmittance efficiency without complicating manufacturing.
Solution Approach 2:
The first transparent conductive layer serves dual functions: it provides electrical conductivity in the slit regions where pixel electrodes are absent, and it contributes to overall light transmittance enhancement. This multi-functionality allows the structure to maintain ease of manufacture while improving illumination intensity across the entire display area.
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 the controllability of liquid crystal molecules, reduces dark strips, and improves the light transmittance efficiency of the liquid crystal display panel by ensuring complete coverage of the pixel electrodes over the opening areas.
Implementation Method 1
coating a surface of said insulating structure and the exposed parts of other layers with a transparent conductive material, and etching said transparent conductive material with a fifth photomask to form a transparent conductive layer through patterning
Data Source
AI summary
The present disclosure discloses a method for manufacturing a HVA pixel electrode and an array substrate. The method comprises: a first metal material is deposited on a substrate, and a first conductive metal layer is formed through etching; a first insulating material and a semiconductor material are deposited on a first conductive metal layer, and an intermediate layer is formed through etching; a second insulating material is deposited on the intermediate layer, and a second conductive metal layer is formed through etching; the second conductive metal layer and an exposed part of the intermediate layer are coated with a second insulating material, and contact holes and a three-dimensional insulating structure are formed through etching; the surface of the insulating structure and the exposed parts of other layers are coated with a transparent conductive material, and a transparent conductive layer is formed through etching. A photomasking procedure is saved, and manufacturing cost is saved. The manufacturing time of array substrate can be shortened, the production capacity can be improved, and the penetration of liquid crystal display panel can be improved.