Under Display Camera Pixel Density Variation
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Solution Overview
Problem
In foldable and slidable electronic devices with under display camera modules, the camera area often has a lower pixel density than the display area, leading to image quality deterioration due to increased camera area size and misalignment between the camera module and display, especially with shape changes or temperature variations.
Innovation Solution
The electronic device design includes a housing with a plate structure that accommodates the camera module within its layers, ensuring the optical axis passes through both the panel and cover layers, with a field of view area having a lower pixel density and a surrounding area with higher pixel density, maintaining alignment and reducing the camera area size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the camera area is increased to accommodate the under display camera module, then the camera module can receive sufficient light, but the area having low pixel density is increased and the image display quality is deteriorated
Solution Approach 1:
The display panel employs different pixel densities in different regions: a first pixel density in the camera area and a second pixel density in the non-camera area, where the first pixel density is lower than the second pixel density. This local differentiation allows the camera area to have sufficient light transmission while the non-camera area maintains high image quality, resolving the contradiction between light reception and display quality.
2Reliability
If the camera area is increased to ensure alignment tolerance, then misalignment between camera module and display can be compensated, but the low pixel density area is enlarged and image quality is deteriorated
Solution Approach 1:
The invention changes the pixel density parameter spatially across the display panel. By setting a lower pixel density specifically in the camera area where alignment tolerance is needed, the system achieves alignment reliability without sacrificing overall image quality, as the pixel density is optimized for each functional region.
3Adaptability or versatility
If the camera area is increased to account for display deformation, then alignment can be maintained during folding or sliding, but the low pixel density area is increased and image quality is deteriorated
Solution Approach 1:
The display panel is designed with spatially varying pixel density to accommodate deformation in foldable or slidable devices. The camera area has lower pixel density to allow for alignment compensation during deformation, while the non-camera area maintains high pixel density for quality display, thus achieving both adaptability and image quality.
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
This configuration improves image quality by minimizing the camera area and maintaining alignment between the camera module and display, even with deformation, thus enhancing the overall display performance.
Implementation Method 1
a camera module including a lens assembly including a plurality of lenses, at least part of the camera module being located in a space formed in the plate structure, and the camera module being coupled to the display such that an extension line of an optical axis passes through the panel layer and the cover layer
Data Source
AI summary
An electronic device is provided. The electronic device includes a housing including a plate structure, a display disposed on the plate structure and including a plurality of layers including a cover layer forming part of a surface of the housing and a panel layer including a light emitting element, and a camera module including a lens assembly including a plurality of lenses, the camera module being at least partially located in a space formed in the plate structure and coupled to the display such that an extension line of an optical axis passes through the panel layer and the cover layer. The panel layer includes a first area including a field of view of the camera module and a second area around the first area, and the number of light emitting elements per unit area of the first area is smaller than the number of light emitting elements per unit area of the second area.