Liquid Crystal Thickness Adjustment for Display Chromaticity
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Solution Overview
Problem
Liquid crystal display (LCD) panels exhibit bluish color dots in white images due to degraded liquid crystal layers, leading to reduced transmittance and color interference, necessitating a method to adjust chromaticity effectively.
Innovation Solution
A chromaticity adjustment method that involves obtaining the chromaticity of a white image, determining deviations from a target value, and adjusting the thickness of the liquid crystal layer corresponding to blue pixels by modifying the blue photoresist layer, along with adjusting voltage and gray scale parameters to align the chromaticity with the target value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the liquid crystal layer corresponding to blue pixels is degraded to turn yellow the color dots, then the bluish chromaticity is improved, but the transmittance rate is reduced and color interference occurs
Solution Approach 1:
The patent applies local quality by adjusting only the thickness of the liquid crystal layer in the blue pixel region, rather than degrading the entire liquid crystal layer. This localized adjustment allows chromaticity correction while preserving the transmittance characteristics of other regions, thereby avoiding color interference and maintaining overall display quality.
Solution Approach 2:
The patent changes the physical parameter of liquid crystal layer thickness specifically in the blue pixel area to adjust chromaticity. By controlling the thickness parameter within a specific range (0.5-2.0μm), the patent achieves chromaticity improvement without excessive degradation that would cause transmittance loss and color interference.
2Manufacturing precision
If the liquid crystal layer corresponding to blue pixels is degraded too much to correct chromaticity, then the chromaticity deviation is reduced, but color interference and transmittance reduction occur
Solution Approach 1:
The patent precisely controls the liquid crystal layer thickness parameter in the blue pixel region within a specific range (0.5-2.0μm). This controlled parameter change allows chromaticity correction while avoiding excessive degradation that would generate color interference and transmittance reduction, thus eliminating harmful side effects.
Solution Approach 2:
The patent employs a feedback mechanism where the chromaticity of the white image is measured and compared against target values, and the liquid crystal layer thickness is adjusted accordingly. This closed-loop control ensures chromaticity accuracy is improved without generating color interference, as the adjustment stops when the target chromaticity is achieved.
3Manufacturing precision
If the thickness of the liquid crystal layer corresponding to blue pixels is adjusted to improve chromaticity, then the chromaticity accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent implements local quality by applying thickness adjustment only to the blue pixel region's liquid crystal layer, rather than modifying the entire display structure. This localized approach improves chromaticity accuracy while minimizing the increase in device complexity, as only a specific area undergoes additional processing.
Solution Approach 2:
The patent adjusts a single critical parameter (liquid crystal layer thickness in blue pixels) within a defined range to achieve chromaticity improvement. This focused parameter change simplifies the overall process compared to comprehensive structural modifications, balancing manufacturing precision improvement with acceptable device complexity.
Data Source
AI summary
The present invention provides a chromaticity adjustment method, a chromaticity adjustment device, and a display panel. The chromaticity adjustment method makes a chromaticity of a white image conform to a target value by adjusting a thickness of a liquid crystal layer corresponding to blue pixels. Therefore, a chromaticity deviation in the display panel can be relieved. In addition, after adjusting a thickness of a blue photoresist layer, an adjustment range of a gray scale of blue sub-pixels (B) can be reduced. While improving the chromaticity, an impact on light transmittance rate can also be reduced, and color interference can be prevented.