Under-Display Camera Substrate Layout to Prevent Light Leakage
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Solution Overview
Problem
Existing AMOLED full screen designs face issues with light leakage and uneven stress on cameras installed in openings across multiple stacked film layers, leading to impaired camera performance and display quality.
Innovation Solution
A display substrate design featuring a base with an organic electroluminescent display layer, touch layer, polarizer, and cover plate sequentially stacked, where the camera is installed on the base away from the organic electroluminescent display layer, and a first opening is provided in the polarizer corresponding to the camera installation area, ensuring no light-emitting layer is present in the camera area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If openings are provided in multiple stacked film layers (organic electroluminescent display layer, touch layer, polarizer, cover plate) to install camera, then camera can be installed on full screen, but light leakage occurs and stress distribution becomes uneven
Solution Approach 1:
The patent divides the opening structure into segments: the first opening is provided only in the polarizer layer, while the organic electroluminescent display layer, touch layer, and cover plate remain intact without openings. This segmented approach allows camera installation while preventing light leakage paths that would occur if openings were made in all layers.
Solution Approach 2:
The patent extracts the opening function from multiple layers and concentrates it solely in the polarizer layer. By removing the opening requirement from the organic electroluminescent display layer, touch layer, and cover plate, the design eliminates light leakage while maintaining camera installation capability.
2Measurement precision
If light-emitting layer is removed in camera area, then camera can capture images without light interference, but display area is reduced
Solution Approach 1:
The patent segments the camera installation area from the display area by providing openings only in the polarizer layer. This allows the camera to receive external light for image capture while the surrounding areas maintain full display functionality with intact light-emitting layers.
Solution Approach 2:
The patent applies local quality change by modifying only the polarizer layer's optical properties in the camera area through opening provision, while keeping the light-emitting layer intact in display areas. This localized modification enables camera function without sacrificing overall display area.
3Ease of manufacture
If camera is installed in recessed opening across multiple layers, then camera can be mounted, but stress distribution becomes uneven and display quality impairs
Solution Approach 1:
The patent segments the structural modification to affect only the polarizer layer, which is more flexible and less critical for structural integrity. By keeping the rigid layers (cover plate, touch layer, substrate) intact, the design maintains uniform stress distribution while still enabling camera installation through the polarizer opening.
Data Source
AI summary
Disclosed are a display substrate and a display apparatus. The display substrate, includes base, and an organic electroluminescent display layer, a touch layer, a polarizer and a cover plate sequentially stacked on the base. The organic electroluminescent display layer and the touch layer are bonded with a first bonding layer, and the polarizer and the cover plate are bonded with a second bonding layer. The display substrate includes a camera installation area and a display area surrounding the camera installation area. A camera is installed on a side of the base away from the organic electroluminescent display layer and located in the camera installation area, a light-emitting layer is not provided in an area of the organic electroluminescent display layer corresponding to the camera installation area, and a first opening is provided in an area of the polarizer corresponding to the camera installation area.