Curved Display Pixel Electrode Subpixel Segmentation
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Solution Overview
Problem
Large-sized liquid crystal display (LCD) devices experience visual image differences and luminance issues due to misalignment of substrates when curved, leading to texture and dark areas.
Innovation Solution
A curved display device design featuring pixel electrodes with specific stem and branch configurations on insulation substrates, including first and second subpixel electrodes with vertical and horizontal stem portions, and minute branch portions, to maintain alignment and improve luminance by adjusting voltages across liquid crystal capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the display device is curved to improve viewing angles and side visibility, then viewing angle is improved, but misalignment of substrates occurs causing texture and dark areas
Solution Approach 1:
The pixel electrode is divided into multiple subpixel electrodes (first subpixel electrode and second subpixel electrode), each with independent stem portions and branch portions. This segmentation allows each subpixel to be independently controlled and aligned, compensating for substrate misalignment in curved displays while maintaining overall image quality and luminance uniformity.
2Adaptability or versatility
If the display device is curved, then side visibility is improved, but luminance uniformity deteriorates due to substrate misalignment
Solution Approach 1:
Different regions of the pixel electrode structure are given different functions: the stem portions provide vertical connection and field generation, while the branch portions extend horizontally to compensate for misalignment effects. This local differentiation ensures uniform luminance across the curved display surface by adjusting the electric field distribution in different areas.
3Ease of manufacture
If conventional pixel electrode design is used in curved display, then manufacturing is simpler, but texture and dark areas occur due to misalignment
Solution Approach 1:
The pixel electrode design employs asymmetric stem portions with different orientations (first vertical stem portion and second vertical stem portion) and corresponding branch portions. This asymmetric configuration compensates for the asymmetric misalignment that occurs in curved displays, improving image reliability while maintaining compatibility with conventional manufacturing processes.
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
The design suppresses texture and dark areas, providing improved luminance and side visibility by ensuring proper alignment of liquid crystal molecules, even when the display is curved, thereby enhancing viewing angles.
Implementation Method 1
The LCD displays an image by generating an electric field on a liquid crystal layer by applying a voltage to the field generating electrodes
Implementation Method 2
determining alignment directions of liquid crystal molecules of the liquid crystal layer through the generated field
Implementation Method 3
controlling polarization of incident light
Data Source
AI summary
A display device according to an exemplary embodiment of the present inventive concept includes: a first insulation substrate; a thin film transistor disposed on the first insulation substrate; a pixel electrode coupled to the thin film transistor; a second insulation substrate facing the first insulation substrate; and a common electrode disposed on the second insulation substrate. The pixel electrode includes a first subpixel electrode including a first vertical stem portion and a first horizontal stem portion that is disposed perpendicular to the first vertical stem portion at an end of the first vertical stem portion, and a second subpixel electrode including a second vertical stem portion and a second horizontal stem portion that is disposed perpendicular to the second vertical stem portion at an end of the second vertical step portion.