Pixel Electrode Slit Configuration for LCD Luminance Uniformity
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Solution Overview
Problem
In liquid crystal displays, the proximity of data wires and electrodes can lead to an undesired increase in pixel luminance, deteriorating display quality, especially in high-resolution devices where the electric field from these wires affects the liquid crystal layer.
Innovation Solution
The implementation of a display device design where the liquid crystal layer is shielded from the electric field by strategically overlapping data lines with pixel electrodes, using slits of varying widths and angles to minimize the impact of the data field, thereby reducing luminance changes and improving display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If data lines are disposed close to pixel electrodes to increase wiring density, then device integration is improved, but luminance uniformity deteriorates due to electric field interference
Solution Approach 1:
A shielding electrode is introduced as an intermediary component between the data line and the pixel electrode. This shielding electrode acts as a mediator that blocks the electric field from the data line from directly affecting the liquid crystal layer, thereby preventing luminance non-uniformity while allowing the data line to remain in close proximity to the pixel electrode for high wiring density
Solution Approach 2:
The harmful electric field effect is extracted and isolated by placing the shielding electrode specifically in the region where the data line overlaps with the pixel electrode. This extracts the interference problem from the overall system and confines it to a localized region that can be effectively managed by the shielding structure
2Manufacturing precision
If more data lines and electrodes are disposed in a limited region to achieve higher resolution, then display resolution is improved, but display quality deteriorates due to increased electric field interference
Solution Approach 1:
The pixel electrode is divided into multiple segments or regions, and shielding electrodes are selectively placed in specific regions where data lines are disposed. This segmentation allows the shielding structure to be applied only where necessary, maintaining high resolution while managing electric field interference in a targeted manner
Solution Approach 2:
The shielding electrode structure is applied locally only in regions where data lines overlap with pixel electrodes, rather than uniformly across the entire display. This local quality approach ensures that shielding is provided where electric field interference occurs, while maintaining optimal performance in other regions
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 approach effectively suppresses luminance increases caused by data fields, enhancing the overall display quality by reducing the influence of data wires on the electric field within the liquid crystal layer, particularly in high-resolution displays.
Implementation Method 1
the pixel electrode may include a first electrode part having a first slit and a second electrode part having a second slit, and a first data line and a second data line, the first and second data lines being adjacent to each other in a first direction, wherein the first pixel electrode overlaps the first data line and the second data line
Data Source
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AI summary
An electrode configuration for a high resolution liquid crystal display panel (10) counteracts the unwanted increase in pixel luminance caused by the reduction of the spacing between data lines and electrodes. In the electrode configuration, a pixel electrode (191) comprises first and second portions (191a, 191b) having first and second slits (Sa, Sb), respectively, and overlaps a first data line (171a) and a second data line (171b) extending adjacent to each other in a first direction (y). The first portion of the pixel electrode (191a) and the first slit (Sa) overlap the first data line (171a) while the second portion (191b) and the second slit (Sb) overlap the second data line (171b). A first overlap area between the first slit (Sa) and the first data line (171a) is arranged to be different in size from a second overlap area between the second slit (Sb) and the second data line (171b).