Curved Display Pixel Electrode Segmentation for Substrate Misalignment
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Solution Overview
Problem
Curved liquid crystal display (LCD) devices experience display abnormalities and reduced luminance due to sheering stress and misalignment of substrates, as well as texture issues resulting from decreased pixel area sizes for high resolution.
Innovation Solution
A display device design featuring pixel electrodes with specific shapes and arrangements, including first and second subpixel electrodes with horizontal and vertical stem portions and minute branch portions, to control liquid crystal molecule alignment and voltage distribution, thereby improving display quality and reducing misalignment-related issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LCD is curvedly formed as a curved display, then side visibility and viewing angle are improved, but sheering stress is applied to substrates causing texture and decreased luminance due to misalignment
Solution Approach 1:
The pixel electrode is divided into multiple regions (first region, second region, third region) with different shape configurations. Each region has stem portions and branch portions arranged differently to compensate for curvature-induced misalignment in specific areas of the curved display, thereby maintaining overall alignment precision across the entire substrate.
Solution Approach 2:
Different regions of the pixel electrode are designed with locally optimized shapes tailored to their specific positions in the curved display. The first region has a first shape, the second region has a second shape, and the third region has a third shape, allowing each local area to compensate for its specific misalignment issues caused by curvature.
2Measurement precision
If the pixel area size is decreased for high resolution, then resolution is improved, but texture is generated due to reduced pixel area
Solution Approach 1:
The pixel electrode is segmented into multiple functional regions (first, second, and third regions) each with specific stem and branch portions. This segmentation allows the electrode to maintain effective area and proper electrical connection even when the overall pixel area is reduced for high resolution displays, preventing texture generation.
Solution Approach 2:
The pixel electrode design extends into multiple dimensions with vertical stem portions and diagonal branch portions creating a three-dimensional-like structure within the two-dimensional plane. This dimensional complexity allows the electrode to maintain functionality and prevent texture in reduced pixel areas.
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 solution effectively reduces display abnormalities and texture issues in curved displays, maintaining high resolution and luminance by adjusting the shape and arrangement of pixel electrodes, ensuring better side visibility and image quality.
Implementation Method 1
applying a voltage to the field generating electrodes to generate an electric field on a liquid crystal layer
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 includes: a first insulation substrate; a thin film transistor disposed on the first insulation substrate; and a pixel electrode coupled to the thin film transistor. The pixel electrode includes a first subpixel electrode that is divided into two regions configured to arrange liquid crystal molecules while including one first horizontal stem portion, and a second subpixel electrode that includes a plurality of second horizontal stem portions.