Array Substrate with Segmented Pixel Electrodes for LCD Viewing Angle
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Solution Overview
Problem
Conventional liquid crystal displays (LCDs) with micro slits or protrusions on electric field generating electrodes face reduced response speed and potential texture display issues due to liquid crystal controllability factors, affecting display quality and viewing angles.
Innovation Solution
An array substrate design featuring a pixel electrode with a first and second subpixel electrode, where the first subpixel electrode is adjacent to the first gate line and the second subpixel electrode is spaced apart from the first subpixel electrode, along with a first and second auxiliary electrode, which overlap and are spaced apart from the gate lines respectively, to improve liquid crystal alignment and reduce parasitic capacitance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If micro slits or protrusions are formed on electric field generating electrodes to achieve wide viewing angle, then viewing angle is improved, but response speed is reduced
Solution Approach 1:
The pixel electrode is divided into multiple sub-pixel electrodes (first sub-pixel electrode and second sub-pixel electrode) arranged in different directions. This segmentation allows each sub-pixel electrode to control liquid crystal molecules in specific orientations, achieving wide viewing angle without the need for micro slits or protrusions that would slow down response speed.
Solution Approach 2:
Different sub-pixel electrodes are designed with different shapes and orientations to control liquid crystal alignment in different local regions. The first sub-pixel electrode has a shape optimized for one direction while the second sub-pixel electrode is optimized for another direction, creating locally optimized alignment that collectively provides wide viewing angle and fast response.
2Adaptability or versatility
If micro slits or protrusions are formed on electric field generating electrodes to achieve wide viewing angle, then viewing angle is improved, but texture display issues occur
Solution Approach 1:
By segmenting the pixel electrode into multiple sub-pixel electrodes with different orientations, the patent achieves wide viewing angle without creating the texture effects that occur with micro slits or protrusions. Each sub-pixel electrode independently controls liquid crystal alignment in its specific direction, preventing the formation of unwanted texture patterns.
3Reliability
If auxiliary electrodes are added to improve liquid crystal alignment, then display quality is improved, but device complexity increases
Solution Approach 1:
The auxiliary electrodes serve multiple functions: they improve liquid crystal alignment, reduce parasitic capacitance between gate lines and pixel electrodes, and enhance overall display quality. By designing the auxiliary electrode structure to perform multiple functions simultaneously, the patent minimizes the need for additional separate components, thereby reducing overall device complexity while achieving 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
Enhances display quality by improving liquid crystal alignment and reducing light leakage at low gray levels, thereby maintaining image clarity and response speed while minimizing texture display issues.
Implementation Method 1
The LCD generates an electric field in the liquid crystal layer by applying voltages to the electric field generating electrodes
Implementation Method 2
the alignment of liquid crystal molecules of the liquid crystal layer is changed, and polarization of incident light is controlled
Implementation Method 3
a first auxiliary electrode overlapping the first gate line; and a second auxiliary electrode disposed between the pixel electrode and the second gate line, the second auxiliary electrode being spaced apart from the second gate line
Data Source
AI summary
An array substrate includes: first and second gate lines extending along a first direction; a data line extending along a second direction crossing the first direction, and being insulated from the first and second gate lines; a pixel electrode disposed in a pixel area defined by the data line, the first gate line, and the second gate line; a first auxiliary electrode overlapping the first gate line; and a second auxiliary electrode disposed between the pixel electrode and the second gate line, the second auxiliary electrode being spaced apart from the second gate line. The pixel electrode includes: a first subpixel electrode disposed adjacent to the first gate line, and having first direction size greater than a second direction size; and a second subpixel electrode spaced apart from the first subpixel electrode in the second direction, and having a first direction size greater than a second direction size.