Curved LCD Pixel Electrode Branch Alignment
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Solution Overview
Problem
Liquid crystal display devices experience issues with texture and luminance reduction when curved, due to misalignment of upper and lower substrates, leading to uneven image quality and viewing differences across the screen.
Innovation Solution
The design incorporates a pixel electrode with first and second subpixel electrodes, each with minute branches extending in specific directions, allowing for parallel alignment of liquid crystal molecules across the electrode structure, which maintains alignment even when the display is curved, reducing dark portions and enhancing luminance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is curved to improve viewing angle and reduce screen size differences, then viewing uniformity is improved, but misalignment between upper and lower substrates occurs causing texture and luminance reduction
Solution Approach 1:
The pixel electrode is designed with different subpixel electrodes (first subpixel electrode with first minute branches and second subpixel electrode with second minute branches) having different branch extending directions. This local differentiation in electrode structure compensates for the misalignment caused by curving, ensuring that liquid crystal molecules maintain proper alignment in different regions of the curved display.
Solution Approach 2:
The pixel electrode is segmented into multiple subpixel electrodes with minute branches extending in different directions. This segmentation allows each subpixel electrode to independently address alignment issues in its specific region, collectively solving the overall alignment problem caused by curving while maintaining manufacturing feasibility.
2Stability of the object's composition
If subpixel electrodes with different branch extending directions are used to compensate for curving misalignment, then alignment consistency is improved, but device complexity increases
Solution Approach 1:
The minute branches of the subpixel electrodes are designed to extend in different directions dynamically matched to the curving orientation. When the display is curved, the branch directions are oriented to compensate for the specific misalignment pattern, providing adaptive alignment compensation without requiring complex mechanical adjustment mechanisms.
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 improves image quality and luminance by ensuring consistent alignment of liquid crystal molecules, minimizing texture and dark portions, even when the display is curved, thereby providing a more uniform viewing experience.
Implementation Method 1
Liquid crystal display devices generate an electric field in the liquid crystal layer by applying voltage to the field generating electrodes. The generated electric field determines the direction of liquid crystal molecules of the liquid crystal layer
Data Source
AI summary
A liquid crystal display device includes: a first insulation substrate; a gate line and data line positioned on the first insulation substrate and insulatively crossing each other; a thin film transistor connected with the gate line and data line; a pixel electrode connected with the thin film transistor; a second insulation substrate spaced apart from and facing the first insulation substrate; and a common electrode positioned on the second insulation substrate, in which the pixel electrode includes a first subpixel electrode including first minute branches extended in a plurality of directions and a second subpixel electrode separated from the first subpixel electrode and including second minute branches, one pixel includes the thin film transistor and pixel electrode, and extending directions of the first minute branches and the second minute branches adjacent to each other in an extending direction of the gate line within one pixel are parallel to each other.