Array Substrate Insulating Layer Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal displays have a small aperture ratio due to the wide width of the black matrix light blocking layer, which cannot meet the requirements of high pixel products.
Innovation Solution
An array substrate with an insulating layer that includes a light transmission portion and a light shielding portion, where the orthographic projections of the gate line, source electrode, drain electrode, and data line are within the light shielding portion, replacing the conventional black matrix and allowing for a smaller light shielding area, thereby increasing the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a conventional black matrix light blocking layer is used, then light shielding efficiency is improved, but aperture ratio deteriorates
Solution Approach 1:
The patent combines the black matrix light blocking layer with the insulating layer into a single integrated structure. The insulating layer is positioned to cover the gate line, source electrode, drain electrode, and data line, while the black matrix layer provides light shielding. This merging eliminates the need for separate black matrix structures, reduces overall layer thickness, and increases aperture ratio while maintaining light shielding efficiency.
Solution Approach 2:
The insulating layer serves multiple functions: it provides electrical insulation for the electrodes and lines, and simultaneously works with the black matrix layer to provide light shielding. This multi-functionality reduces the number of separate components needed and increases the aperture ratio by eliminating redundant structures.
2Object-affected harmful factors
If the black matrix light blocking layer width is increased, then light shielding efficiency is improved, but aperture ratio deteriorates
Solution Approach 1:
The patent applies local quality by positioning the black matrix layer and insulating layer precisely where needed - covering only the electrode and line structures that require light shielding. This localized approach provides sufficient light blocking efficiency while minimizing the area occupied by light-blocking structures, thereby maximizing the aperture ratio.
3Reliability
If multiple separate layers are used for insulation and light shielding, then insulation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent merges the insulating layer and black matrix layer into an integrated structure where the insulating layer covers the electrodes and lines while the black matrix layer provides light shielding. This combination maintains the functional separation needed for insulation and light blocking while reducing the number of discrete layers and simplifying the overall device structure.
Data Source
AI summary
An array substrate, a method for manufacturing an array substrate and a display device are provided. The array substrate includes: a base substrate, and an insulating layer, a gate line, a source electrode, a drain electrode, and a data line on the base substrate. The insulating layer includes a light transmission portion and a light shielding portion, and orthographic projections of the gate line, the source electrode, the drain electrode, and the data line on the base substrate are all within an orthographic projection of the light shielding portion on the base substrate.