Wide-Viewing-Angle LCD Panel Color Filter Compensation
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Solution Overview
Problem
Traditional wide view angle LCD panels suffer from nonuniform light transmittance and poor display effects due to fluctuations in liquid crystal efficiency, resulting in bright and dark stripes.
Innovation Solution
The light transmittance on the color filter substrate is adjusted to be in a compensation relationship with the liquid crystal efficiency on the slit electrode, ensuring high and uniform light transmittance across the panel by using a color filter with varying thickness or ink density, matching the liquid crystal efficiency ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a slit electrode is used in an FFS wide view angle LCD panel to drive liquid crystals, then the liquid crystal rotation degree can be controlled by the electric field, but the light transmittance becomes nonuniform with bright and dark stripes
Solution Approach 1:
The patent applies local quality by making the color filter transmittance position-dependent. Specifically, the color filter is designed with different light transmittance values at different positions: the first region (corresponding to the slit electrode) has a first light transmittance, while the second region (corresponding to the non-slit area) has a second light transmittance. This local variation in color filter properties compensates for the nonuniform liquid crystal efficiency across the pixel, thereby achieving uniform overall light transmittance and eliminating bright and dark stripes.
2Ease of operation
If the electric field is strongest at the edges of the slit electrode, then the liquid crystal rotation is highest at these positions, but the light transmittance becomes nonuniform
Solution Approach 1:
The patent applies parameter changes by modifying the light transmittance parameter of the color filter at different positions. The color filter is designed with position-dependent transmittance: in the first region corresponding to the slit electrode, the color filter has a first light transmittance, while in the second region corresponding to the non-slit area, it has a second light transmittance. This parameter variation in the color filter compensates for the electric field-induced nonuniformity in liquid crystal rotation, achieving uniform overall light transmittance across the pixel.
3Productivity
If the liquid crystal efficiency varies across the pixel plane, then the display can be driven, but the display effect deteriorates due to bright and dark stripes
Solution Approach 1:
The patent applies local quality by making the color filter transmittance position-dependent. Specifically, the color filter is designed with different light transmittance values at different positions: the first region (corresponding to the slit electrode) has a first light transmittance, while the second region (corresponding to the non-slit area) has a second light transmittance. This local variation in color filter properties compensates for the nonuniform liquid crystal efficiency across the pixel, thereby achieving uniform overall light transmittance and eliminating bright and dark stripes.
Solution Approach 2:
The patent converts the harmful effect of nonuniform liquid crystal efficiency into a benefit by using it as the basis for designing the color filter's nonuniform transmittance. The color filter's transmittance distribution is specifically designed to match and compensate for the liquid crystal efficiency distribution. By doing so, the original harm (nonuniformity) is transformed into a useful compensation mechanism, achieving uniform overall light transmittance and improved display quality.
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 eliminates the phenomenon of bright and dark stripes, significantly improving the display effect by maintaining uniform light transmittance and enhancing the overall performance of the wide view angle LCD panel.
Implementation Method 1
The light transmittance on the color filter substrate is adjusted to be in a compensation relationship with the liquid crystal efficiency on the slit electrode
Implementation Method 2
an electric field between a common electrode and a pixel electrode on an array substrate is employed to drive liquid crystals to rotate
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A wide-viewing-angle liquid crystal display panel, a color film base plate (20) and a manufacturing method thereof as well as a display device. The wide-viewing-angle liquid crystal display panel comprises an array base plate (10) and a color film base plate (20). The array base plate (10) comprises a planar electrode (11) and a slit-shaped electrode (12), which are mutually superposed and insulated, and the color film base plate (20) comprises: a transparent base plate (21) oppositely arranged on one side, of the array base plate (10), provided with the planar electrode (11) and the slit-shaped electrode (12); and a color resistor (22) arranged on the transparent base plate (21) and corresponding to the slit-shaped electrode (12). The ratio of the light transmission rate T1 of anyone part of the color resistor (22) to the light transmission rate T2 of the other anyone part is equal to the ratio of the liquid crystal efficiency X2 of the slit-shaped electrode (12) corresponding to the other anyone part to the liquid crystal efficiency X1 corresponding to the anyone part. The light transmission rate of anyone position of the wide-viewing-angle liquid crystal display panel is high and uniform, bright and dark stripes are not generated, and the display effect is improved.