Array Substrate Multi-Primary Color Resist Light Shielding
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Solution Overview
Problem
The manufacturing process of LCD panels faces alignment deviations and defects such as light leakage and reduced transmittance due to limitations in alignment accuracy when the array substrate and color filter substrate are cell-assembled, leading to increased costs and complexity.
Innovation Solution
Forming color filters on the array substrate with single-primary color resist sections in pixel regions and multi-primary color resist sections in light-shielding regions, which includes superposed color resist layers to achieve light shielding, reducing the need for a black matrix and simplifying the patterning processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If black matrixes are designed to be wide enough to avoid alignment deviation problems, then alignment accuracy is improved, but transmittance is reduced and backlight cost increases
Solution Approach 1:
The invention extracts the light-shielding function from the traditional black matrix structure and relocates it to the color filter layer on the array substrate. By forming color filters directly on the array substrate including in the light-shielding regions, the patent eliminates the need for wide black matrixes, thereby maintaining high transmittance while ensuring proper light shielding where needed.
Solution Approach 2:
The invention merges the color filter layer and light-shielding regions into a single integrated structure on the array substrate. The color filter layer is formed to include both color-filtering portions and light-shielding portions, combining multiple functions into one layer and eliminating the need for separate wide black matrixes.
2Ease of manufacture
If color filters are formed on the array substrate using COA technology, then production cost is reduced, but the number of patterning processes increases
Solution Approach 1:
The invention segments the color filter layer formation into distinct single-primary color resist sections for pixel regions and multi-primary color resist sections for light-shielding regions. This segmentation allows different patterning approaches for different functional areas, simplifying the overall process while maintaining cost benefits of COA technology.
Solution Approach 2:
The invention applies different color resist compositions to different regions: single-primary color resists in pixel regions for color display and multi-primary color resists in light-shielding regions for light blocking. This local differentiation optimizes both the color display performance and light shielding effectiveness while managing process complexity.
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 lowers production costs by reducing the number of patterning processes, maintains high contrast, and effectively addresses light leakage issues without requiring special materials or complex processes.
Implementation Method 1
multi-primary color resist sections each include a plurality of superposed color resist layers to shield light
Data Source
AI summary
An array substrate, a manufacturing method thereof and a display device. The array substrate includes a base substrate; and gate lines and data lines disposed on the base substrate, in which the gate lines and the data lines are intersected to define pixel regions; thin-film transistors (TFTs) are disposed in the pixel regions; a color filter layer is disposed on the TFTs; the color filter layer includes: single-primary color resist sections disposed in the pixel regions and multi-primary color resist sections disposed in light-shielding regions; the single-primary color resist sections each include a color resist layer of one primary color; and the multi-primary color resist sections each include color resist layers to shield light. Thus, color filters can be formed on the array substrate, the number of patterning processes can be reduced, and the production cost can be lowered.