Shielding Electrodes for Curved Display Light Leakage
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Solution Overview
Problem
Curved displays experience light leakage due to deviations in substrate positions, which affect display quality and cannot be effectively addressed by existing technologies.
Innovation Solution
A display panel design featuring alternating sub-pixel regions with shielding electrodes on the first substrate, overlapping the common boundary between sub-pixel regions to shield light leakage, maintaining alignment with pixel electrodes and providing a fixed voltage to stabilize liquid crystal alignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the curved display is formed by bending the flat panel display by an external force, then the curved display surface can be achieved, but deviations of corresponding positions between the two substrates occur which induce light leakage
Solution Approach 1:
The patent applies preliminary action by pre-designing the shielding electrode structure and positioning it at specific locations (common boundaries between sub-pixel regions) before the bending process. The shielding electrode is configured with specific width and positioning relative to data lines and pixel electrodes, creating a preventive structure that addresses potential alignment deviations before they cause light leakage issues in the curved display
Solution Approach 2:
The shielding electrode acts as an intermediary element between the data lines and pixel electrodes. It is positioned at the common boundaries between sub-pixel regions and extends in the second direction to overlap with data lines, serving as a mediator that blocks light leakage paths without interfering with the normal operation of pixel electrodes or data line signaling
2Reliability
If shielding structures are added to reduce light leakage, then display quality improves, but device complexity increases
Solution Approach 1:
The patent applies local quality by placing shielding electrodes only at specific locations where light leakage is most problematic - namely at the common boundaries between first and second sub-pixel regions. The shielding electrode width and positioning are locally optimized to overlap with data lines and extend in the second direction, providing targeted light leakage prevention without adding shielding structures across the entire display area
Solution Approach 2:
The shielding electrode structure merges multiple functions into a single element: it serves as both a light leakage barrier and an integral part of the pixel electrode structure. The shielding electrode is positioned to overlap with data lines and extend in the second direction, combining light shielding functionality with the existing pixel electrode layout without requiring separate additional structures
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 light leakage during both bright and dark display states, enhancing display quality without the need for light shielding patterns on the second substrate, and maintains effectiveness in curved display applications.
Implementation Method 1
providing a fixed voltage to stabilize liquid crystal alignment
Data Source
AI summary
A display panel includes a first substrate, first gate lines, first data lines, second data lines, third data lines, fourth data lines, first sub-pixels, second sub-pixels and first shielding electrodes. The first substrate has a plurality of first sub-pixel regions and second sub-pixel regions. The first gate lines extend along a first direction. The first data lines, the second data lines, the third data lines and the fourth data lines extend along a second direction and are sequentially arranged in the first direction. The first sub-pixel is electrically connected to one of the first data line and the second data line. The second sub-pixel is electrically connected to one of the third data line and the fourth data line. The first shielding electrodes extend along the second direction and are disposed in a common boundary between the first sub-pixel region and the second sub-pixel region adjacent to each other.