Display Panel Segmented Driving Circuits Light Transmittance
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Solution Overview
Problem
Conventional augmented reality display panels face challenges with non-uniform threshold voltage in OLEDs, leading to increased space occupation by pixel driving circuits and poor light transmittance due to dense signal lines, resulting in a 'screen window effect' and poor user experience.
Innovation Solution
A display panel design featuring pixel regions with a pixel island and a transparent region, where K active display areas are arranged in a matrix, and K pixel driving circuits are uniformly distributed in sub-regions, reducing signal line density and improving light transmittance by positioning electrode leads as bending electrode leads to avoid crossing and optimize wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pixel driving circuits are densely arranged to drive multiple active display areas, then the display resolution is improved, but the light transmittance deteriorates due to increased signal line density
Solution Approach 1:
The pixel island is divided into K active display areas, each driven by a dedicated pixel driving circuit. The pixel driving circuits are segmented and distributed in separate sub-regions rather than being concentrated in one area, which reduces signal line density in any single location and improves light transmittance while maintaining high display resolution through the segmented active display areas.
2Device complexity
If pixel driving circuits are placed close to active display areas to reduce wiring complexity, then the device complexity is reduced, but the threshold voltage non-uniformity worsens
Solution Approach 1:
Different sub-regions are designed with specific functions: some sub-regions contain pixel driving circuits while others contain active display areas. The pixel driving circuits are positioned in sub-regions with optimized characteristics for voltage stability, ensuring uniform threshold voltage. The local quality of each sub-region is tailored to its specific function, separating the wiring complexity issue from the threshold voltage uniformity issue.
3Ease of operation
If signal lines are densely routed to connect pixel driving circuits with active display areas, then the connectivity is improved, but the screen window effect worsens due to poor light transmittance
Solution Approach 1:
The connection between pixel driving circuits and active display areas is achieved not only through planar signal lines but also through vertical stacking. The pixel driving circuits and active display areas are positioned in different sub-regions with three-dimensional spatial relationships, allowing signal lines to route through multiple dimensions rather than being constrained to a single plane. This reduces the density of signal lines in any single view direction, improving light transmittance and reducing the screen window effect while maintaining connectivity.
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a plurality of light emitting points; a plurality of pixel driving circuits, wherein at least one of the plurality of light emitting points is connected to at least one of the plurality of pixel driving circuits; and a plurality of electrode leads, the at least one of the plurality of light emitting points is connected to the at least one of the plurality of pixel driving circuits through at least one of the plurality of electrode leads; the plurality of pixel driving circuits are separated from the plurality of light emitting points.