Slit Electrode Pixel Layout for LCD Viewing Angle Color Control
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Solution Overview
Problem
Liquid crystal displays in vertical alignment mode suffer from significant left-right viewing angle color deviation and CR (80/20) level differences due to asymmetric tilt states of liquid crystal molecules, affecting optical performance.
Innovation Solution
Designing a pixel unit with slit electrodes where the extension directions of slits in adjacent domain areas form acute angles greater than 30° and less than 45°, and optimizing slit extensions to domain boundaries to stabilize liquid crystal molecules, reducing asymmetric alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the liquid crystal molecules are arranged in asymmetric tilt states in different domain areas, then the viewing angle is improved, but the left-right viewing angle color deviation and CR level difference increase
Solution Approach 1:
The patent applies asymmetry by configuring slit electrodes with different extension directions in different domain areas. Specifically, the first domain area has a slit extending in a first direction while the second domain area has a slit extending in a second direction that is different from the first direction. This asymmetric arrangement of slits in adjacent domain areas creates different electric field distributions that guide liquid crystal molecules into asymmetric tilt states, thereby improving viewing angle performance while controlling color deviation through the specific angular relationships between slit directions.
2Ease of manufacture
If the slit extension direction is optimized to stabilize liquid crystal molecules, then color deviation is reduced, but the domain area structure becomes more complex
Solution Approach 1:
The patent applies local quality by configuring each domain area with slit electrodes having specific extension directions tailored to that domain's requirements. The first domain area receives slits extending in a first direction while the second domain area receives slits extending in a second direction. This localized optimization of slit directions in different domain areas stabilizes liquid crystal molecules in each region, reducing color deviation while the overall structure remains manageable through systematic angular relationships between domains.
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
Improves color deviation and transmittance by stabilizing liquid crystal molecules, enhancing viewing angle performance and reducing color cast in liquid crystal displays.
Implementation Method 1
the pixel unit comprises at least two sub-pixels corresponding to different colors, each of the pixels comprises n domain areas arranged along a first direction... extension directions of the slits of the slit electrodes in any two adjacent domain areas in the n domain areas of the pixel unit are different
Data Source
AI summary
The present disclosure provides a pixel unit, a display substrate, a display panel, and a display device. The pixel unit includes a slit electrode having a slit. The pixel unit includes at least two sub-pixels corresponding to different colors, each of the pixels includes n domain areas arranged along a first direction, n is a positive integer greater than or equal to 2, extension directions of the slits of the slit electrodes in any two adjacent domain areas in the n domain areas of the pixel unit are different, an acute angle between an extension direction of the slit in each domain area and a second direction is a predetermined angle, the predetermined angle is greater than or equal to 30° and less than 45°, and the second direction intersects with the first direction.