CUP Display Electrode Sub-Electrodes for Light Transmittance
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Solution Overview
Problem
Display panels with camera under panel (CUP) technology face issues of non-uniform display and reduced light transmittance due to process precision challenges in the CUP area, affecting imaging and full-screen display design.
Innovation Solution
A display panel design featuring a light-transmitting region with first pixel units, each comprising a first electrode layer and an electrode portion connected to it, along with sub-electrodes and trace portions, ensures orthographic projections within boundaries to enhance light transmittance and achieve uniform display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If camera under panel (CUP) technology is applied with reduced pixel density in CUP area, then light transmittance of CUP area is improved, but display uniformity deteriorates due to process precision issues
Solution Approach 1:
The first electrode is divided into multiple sub-electrodes (first sub-electrode, second sub-electrode, third sub-electrode, fourth sub-electrode) corresponding to different sub-pixels. Each sub-electrode has its electrode portion's orthographic projection located within the boundary of its corresponding sub-electrode layer, enabling independent optimization of each sub-pixel's light transmittance and display uniformity while maintaining overall display quality in the CUP area.
2Illumination intensity
If electrode structure is optimized for light transmittance in CUP area, then light transmittance is improved, but display uniformity deteriorates
Solution Approach 1:
The patent applies different electrode configurations to different regions: in the CUP area, the first electrode layer is divided into multiple sub-electrode layers with electrode portions positioned within their respective boundaries to optimize local light transmittance; while in the non-CUP area, the display structure maintains standard configuration for optimal display uniformity. This local differentiation resolves the contradiction between light transmittance and display uniformity.
3Illumination intensity
If pixel density is reduced in CUP area, then light transmittance is improved, but manufacturing precision challenges arise affecting display quality
Solution Approach 1:
The patent introduces a vertical layering dimension by stacking multiple sub-electrode layers (first sub-electrode layer, second sub-electrode layer, third sub-electrode layer, fourth sub-electrode layer) with corresponding electrode portions at different heights. This three-dimensional electrode structure allows light to pass through multiple layers with electrode portions positioned within their respective sub-electrode layer boundaries, improving light transmittance while maintaining precise manufacturing control for each layer.
Data Source
AI summary
A display panel and a display device are provided by the present application. The display panel includes a light-transmitting display region, wherein the light-transmitting display region includes a plurality of pixel units, each of the pixel units includes a first electrode layer and an electrode portion electrically connected to the first electrode layer, and the electrode portion and the first electrode layer constitute a first electrode of the pixel unit; and an orthographic projection of the electrode portion on the first electrode layer is located within a boundary of the first electrode layer.