Display Substrate Layout for Uniform Under-Screen Camera Brightness
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Solution Overview
Problem
The challenge of achieving a full-screen display effect while accommodating a front camera without visible camera holes, particularly in organic light emitting diode displays, is addressed by integrating an under-screen camera technology that maintains uniform display brightness across different pixel density regions.
Innovation Solution
A display substrate design with distinct areas of varying pixel densities, including a main display area, secondary display area with an aperture region for the camera, and transition areas with intermediate pixel densities, coupled with dual driving circuits and conductive connections to ensure uniform light transmission and reduced brightness differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If an under-screen camera is integrated to achieve full-screen display effect, then the screen-to-body ratio is improved, but the display brightness uniformity deteriorates due to different pixel densities in different regions
Solution Approach 1:
The patent applies local quality by creating different pixel density zones in different regions of the display. The main display area uses high pixel density for primary content, while the secondary display area (containing the under-screen camera) uses lower pixel density to accommodate the camera module. This localized differentiation allows each region to have optimal characteristics for its specific function.
Solution Approach 2:
The display is segmented into multiple regions with different pixel densities: a main display area with first pixel density and a secondary display area with second pixel density. This segmentation allows the display to simultaneously achieve high screen-to-body ratio through the under-screen camera integration while maintaining acceptable display quality in each segmented region.
2Illumination intensity
If dual driving circuits are used to control different pixel density regions, then the display brightness uniformity is improved, but the device complexity increases
Solution Approach 1:
The driving circuit system is segmented into a first driving circuit and a second driving circuit, where each circuit independently controls a specific pixel density region. This segmentation allows for optimized control of each region's brightness characteristics while maintaining manageable complexity through functional separation.
Solution Approach 2:
The patent employs parameter changes by adjusting pixel density and brightness parameters differently across regions. The first driving circuit controls the main display area with higher pixel density and appropriate brightness, while the second driving circuit controls the secondary display area with lower pixel density and adjusted brightness parameters to achieve overall visual uniformity.
Data Source
AI summary
A display substrate includes a main display area, a secondary display area and a transition area; the secondary display area includes an aperture region, a first peripheral region and a second peripheral region, at least part of the first peripheral region being located between the aperture region and the second peripheral region; the aperture region includes display sub-pixels; the first peripheral region includes display sub-pixels and first virtual sub-pixels; the second peripheral region includes display sub-pixels and second virtual sub-pixels; the density of the display sub-pixels of the aperture region, the density of the display sub-pixels of the first peripheral region and the density of the display sub-pixels of the second peripheral region are the same; at least part of the transition area is located between the main display area and the second peripheral region; the main display area and the transition area both includes display sub-pixels.