Color Filter Substrate Charge Release for Green Light Suppression
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Solution Overview
Problem
Ultra-narrow bezel liquid crystal display panels suffer from poor display quality due to green light emission during a grayscale of 0 (L0) screen, caused by charge accumulation and electromotive forces, leading to greening issues.
Innovation Solution
A color filter substrate with a base substrate, a color filter layer comprising periodically arranged photoresist units and a black matrix layer with light transmitting windows, where the color filter layer includes filling parts matching the thickness and material of the photoresist units, reducing charge transfer and electromotive forces, and a supporting pillar for uniform cell thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of moving object
If ultra-narrow bezel design is implemented, then the screen-to-body ratio is improved, but green light emission occurs during L0 screen display
Solution Approach 1:
The patent extracts and removes the harmful charge accumulation from the system by providing a charge release structure (filling part with different material properties) that allows accumulated charges to be released, thereby eliminating the green light emission problem while maintaining the ultra-narrow bezel design
Solution Approach 2:
The patent changes the material parameters of the filling part to have different charge holding properties compared to the surrounding photoresist units, creating a charge release pathway that prevents charge accumulation and subsequent green light emission during L0 display
2Length of moving object
If sealing area is reduced to less than 0.5 mm, then the bezel width is reduced, but charge accumulation and electromotive forces increase
Solution Approach 1:
The patent introduces a filling part as an intermediary element between the color photoresist units that serves as a charge release pathway, mediating the charge accumulation problem caused by the reduced sealing area and preventing harmful electromotive forces
3Device complexity
If color filter layer structure is simplified, then manufacturing complexity is reduced, but charge accumulation problems worsen
Solution Approach 1:
The patent merges the charge release function with the existing color filter layer structure by integrating the filling part into the same layer, achieving charge release functionality without adding separate complex structures or manufacturing steps
Data Source
AI summary
A color filter substrate includes a base substrate, a black matrix layer and a color filter layer. The color filter layer includes a plurality of color photoresist units arranged in an array, the plurality of color photoresist units being formed with a plurality of color photoresist rows, a plurality of first color photoresist columns, a plurality of second color photoresist columns and a plurality of third color photoresist columns, and wherein the color filter layer further includes at least one filling part located between the color photoresist rows and has a thickness equal to that of at least one of the plurality of color photoresist units; and the black matrix layer is disposed between the color filter layer and the base substrate, and includes a plurality of light transmitting windows.