Pixel Electrode Structure With Progressive Widths For IPS LCD
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Solution Overview
Problem
The display quality of images in IPS mode and FFS mode LCD devices is degraded due to non-uniform spacing and widths of pixel electrodes, leading to inconsistent electric field distribution and refractive index anisotropy.
Innovation Solution
A pixel electrode structure with sub-pixel electrodes having progressively greater widths and spaces from one side of the pixel region to the other, ensuring a consistent and optimized electric field distribution through a preset pattern, improving light transmittance and reducing defects like mura.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel electrodes are arranged with uniform width and spacing, then manufacturing is simple, but display quality is degraded due to non-uniform electric field distribution
Solution Approach 1:
The patent applies local quality by making the pixel electrodes have different widths at different locations. Specifically, the pixel electrodes are designed with a first width in a first region and a second width in a second region, where the widths are different. This non-uniform width distribution creates a more uniform electric field across the display area, improving display quality while addressing the non-uniformity issue inherent in uniform electrode designs.
2Device complexity
If pixel electrodes have the same width and spacing, then device structure is simple, but electric field distribution becomes non-uniform causing image quality degradation
Solution Approach 1:
The patent implements local quality by varying the width of pixel electrodes across different regions of the display. The pixel electrodes have a first width in a first region and a second width in a second region, creating localized adjustments that collectively achieve uniform electric field distribution across the entire display area.
Solution Approach 2:
The patent applies asymmetry by intentionally designing pixel electrodes with different widths in different regions rather than using a symmetric uniform design. This asymmetric width distribution compensates for the non-uniform electric field that would otherwise occur, particularly near the edges and corners of the display area.
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 solution enhances image display quality by maintaining consistent electric field distribution and refractive index, improving light transmittance and reducing defects, while allowing for flexible fabrication of sub-pixel electrodes in crooked shapes to enhance viewing angles.
Implementation Method 1
pixel electrodes disposed in first and second pixel regions in which an electric field is applied for displaying an image
Implementation Method 2
the liquid crystal molecules are aligned along an electric field vertically applied thereto
Data Source
AI summary
A pixel electrode structure of a display device is discussed. According to an embodiment, the pixel electrode structure includes a plurality of sub pixel electrodes in a pixel region, the pixel region including a first sub pixel region and a second sub pixel region, wherein each of the plurality of sub pixel electrodes has a bent line shape and is disposed substantially in parallel to each other, and wherein the plurality of sub pixel electrodes have progressively greater widths and progressively greater intervals therebetween along a predetermined direction.