LCD Pixel Electrode Reference Voltage Line Texture Control
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Solution Overview
Problem
In vertical alignment mode liquid crystal displays, the response speed of liquid crystal molecules is deteriorated due to minute slits, leading to texture formation and reduced display quality, while also risking vertical line stains and aperture ratio reduction.
Innovation Solution
The design includes an insulation substrate with elongated horizontal pixels, a reference voltage line extending vertically, and a configuration of high-gray and low-gray subpixel areas with specific domain arrangements and connections to minimize texture formation and prevent vertical line stains, maintaining aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If minute slits are formed in the pixel electrode to widen viewing angle, then viewing angle is improved, but response speed deteriorates and texture is displayed
Solution Approach 1:
The patent extracts and removes the minute slits from the pixel electrode structure. Instead of forming cutouts in the pixel electrode, the invention uses a different approach by introducing a reference voltage line that extends along the center of the display area, thereby eliminating the harmful effect of minute slits on response speed while maintaining wide viewing angle characteristics through domain division.
Solution Approach 2:
Instead of modifying the pixel electrode with minute slits to control liquid crystal orientation, the patent inverts the approach by using a reference voltage line positioned at the center and domain division to achieve the same orientation control without the detrimental effects on response speed.
2Adaptability or versatility
If minute slits are formed in the pixel electrode, then tilt directions are distributed and viewing angle is widened, but texture is displayed over time
Solution Approach 1:
The patent removes the minute slits from the structure and replaces them with a reference voltage line and domain division approach, thereby eliminating the texture defect while preserving the wide viewing angle capability through alternative means.
Solution Approach 2:
The patent introduces a reference voltage line as an intermediary element that extends along the center of the display area. This reference voltage line serves as a mediator to control liquid crystal orientation and distribute tilt directions without causing the texture defect associated with minute slits in the pixel electrode.
3Reliability
If reference voltage line is positioned to prevent vertical line stains, then display quality is improved, but aperture ratio may be reduced
Solution Approach 1:
The patent applies local quality by positioning the reference voltage line specifically along the center of the display area and using domain division in specific regions. This localized approach allows the reference voltage line to prevent vertical line stains in critical areas while minimizing its impact on the overall aperture ratio by confining it to the center region.
Solution Approach 2:
The patent uses partial action by implementing domain division in specific subpixel areas rather than uniformly across the entire display. The reference voltage line is positioned to provide just enough control to prevent vertical line stains without excessively reducing the aperture ratio, applying the principle of doing just enough to solve the problem.
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 configuration enhances display quality by reducing texture formation and preventing vertical line stains while maintaining a high aperture ratio, ensuring consistent luminance and improved viewing angles.
Implementation Method 1
an image is displayed by controlling the polarization of incident light
Implementation Method 2
a liquid crystal layer interposed between the two display panels
Implementation Method 3
a voltage is applied to the field generating electrodes to generate an electric field in the liquid crystal layer, which determines the direction of liquid crystal molecules
Data Source
AI summary
A liquid crystal display includes an insulation substrate, a plurality of pixels disposed on the insulation substrate, where each pixel has a shape elongated in a horizontal direction, and includes a thin film transistor formation region and a display area; and a reference voltage line extending in a vertical direction along a center of the display area, where the display area includes a single high-gray subpixel area and two low-gray subpixel areas, and the single high-gray subpixel area is positioned between the two low-gray subpixel areas.