Color Filter Substrate with Variable Blue Area for Display Color Shift Compensation
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Solution Overview
Problem
Liquid crystal display devices experience a color shift phenomenon due to selective absorption of blue light by the light guide plate, leading to image quality degradation.
Innovation Solution
A color filter substrate with varying ratios of color filters across pixel units, where the area of a specific color filter increases or decreases gradually from one side to the other, compensating for the color shift by adjusting the transmittance of blue light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a light guide plate is used in an edge type backlight device, then the display device can be manufactured with a slim profile and uniform light distribution, but the light guide plate selectively absorbs blue light causing color shift phenomenon and degrading image quality
Solution Approach 1:
The patent applies local quality by making the area of blue color filters non-uniform across the display panel. Specifically, the blue color filter area is smaller in pixel units near the light source side and larger in pixel units away from the light source side. This local variation compensates for the differential blue light absorption by the light guide plate, thereby resolving the color shift phenomenon while maintaining the slim profile design.
2Ease of manufacture
If the light guide plate absorbs blue light selectively, then the material can be simplified and manufacturing cost reduced, but the blue light transmittance varies across the display device causing color inconsistency
Solution Approach 1:
The patent applies parameter changes by modifying the area parameter of blue color filters in different regions of the display panel. The blue color filter area is adjusted as a variable parameter based on position: smaller areas near the light source and larger areas farther from the light source. This parameter adjustment compensates for the non-uniform blue light transmittance caused by the light guide plate's selective absorption, thereby achieving color consistency without complicating the light guide plate material.
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
The solution effectively alleviates the color shift phenomenon, improving image quality by ensuring consistent blue light transmittance across the display device.
Implementation Method 1
The material of the light guide plate generally absorbs selectively the blue light in the white light
Data Source
AI summary
The application discloses a color filter substrate, an array substrate, a display panel and a display device. The color filter substrate comprises a first base substrate and a plurality of pixel units provided above the first base substrate, each of the pixel units comprising color filters of various colors; from a pixel unit close to a first side of the first base substrate towards a pixel unit close to a second side of the first base substrate opposite to the first side, a ratio of an area of a color filter of a specific color to that of any one of color filters of other colors is increased gradually. In the application, the color filter of the specific color is able to compensate for the color shift of the light guide plate, alleviating the color shift of the display device, and thereby improving the image quality of the display device.