OLED Mask Assembly with Segmented Cathode Patterns for Camera Transmittance
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Solution Overview
Problem
The cathode layer in OLED display panels can negatively impact light transmittance, resulting in a poor imaging effect for front cameras integrated into the display region.
Innovation Solution
A mask assembly is provided, comprising an annular mask frame, a supporting structure with an opening, and a mask structure with a strip-shaped mask body and a sheet-shaped mask piece. The mask piece is fixedly connected to the mask body and has first through holes, allowing for the formation of cathode patterns with gaps, thereby improving light transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the cathode layer is formed as a continuous layer to ensure complete coverage and electrical functionality, then the electrical conductivity and coverage are improved, but the light transmittance deteriorates due to blockage of light paths
Solution Approach 1:
The cathode layer is segmented into discrete cathode patterns rather than forming a continuous layer. The mask structure with through holes defines these patterns, creating gaps between adjacent cathode regions. This segmentation maintains electrical conductivity within each pattern while allowing light to pass through the gaps, thus resolving the contradiction between coverage and light transmittance.
2Illumination intensity
If the cathode layer is formed with gaps to improve light transmittance, then the light transmittance is improved, but the electrical conductivity and coverage deteriorate
Solution Approach 1:
The mask structure implements local quality by providing different functionalities in different regions: the mask body and connecting portions provide electrical connectivity and structural support, while the through holes provide optical transparency. This localized differentiation allows the cathode layer to have both conductivity where needed and light transmission where gaps are required.
3Ease of manufacture
If a traditional solid mask structure is used to form the cathode layer, then the manufacturing simplicity is maintained, but the light transmittance deteriorates due to lack of gaps
Solution Approach 1:
The mask structure is segmented into a mask body and separate connecting portions with through holes. This segmentation is achieved through a straightforward manufacturing process that forms the mask body and connecting portions, then creates through holes in the mask body. The segmented design enables light transmission through the through holes while maintaining manufacturing simplicity.
Data Source
AI summary
Provided is a mask assembly, including: an annular mask frame; a supporting structure, located on a side of the mask frame, fixedly connected to the mask frame, and having an opening; and a mask structure, located on a side of the mask frame and fixedly connected to the mask frame, and including a strip-shaped mask body and a sheet-shaped mask piece corresponding to the opening, wherein the mask piece is fixedly connected to a side edge of the mask body and has a plurality of first through holes, wherein an orthographic projection of the mask body on a bearing surface of the mask frame does not overlap with an orthographic projection of the opening on the bearing surface, and an orthographic projection of the mask piece on the bearing surface overlaps with the orthographic projection of the opening on the bearing surface.