Under-Display Screen Structure for Optical Device Integration
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Solution Overview
Problem
The challenge in the mobile phone industry is to increase the screen ratio while ensuring that optical devices such as cameras and sensors, which need to transmit or receive light, maintain optimal performance without being affected by the translucence of the screen, when arranged below the display.
Innovation Solution
A screen structure with a primary and secondary display area, where the secondary display area has a different pixel distribution and larger sub-pixels to minimize wire density, allowing optical devices to be placed below without compromising display quality, and a method for synchronized control of both areas to ensure seamless content display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If optical devices are arranged below the screen to improve screen ratio, then screen-to-body ratio is improved, but optical device performance deteriorates due to screen translucence
Solution Approach 1:
The display screen is segmented into a first display area with normal pixel density and a second display area with reduced pixel density. The second display area has larger sub-pixels and fewer wires, creating a localized region with higher light transmittance. This segmentation allows optical devices to be positioned below the second display area while maintaining their performance, as the reduced pixel density and wire density in this region minimize interference with light transmission to the optical devices.
Solution Approach 2:
Different regions of the display screen are assigned different pixel densities and structural characteristics. The second display area specifically is designed with larger sub-pixels, fewer wires per unit area, and adjusted wire routing to maximize light transmittance in the localized region where optical devices are positioned. This local quality adjustment ensures that optical device performance is maintained in the critical region while the rest of the screen maintains normal display quality.
2Reliability
If pixel density is reduced in secondary display area to improve light transmittance, then optical device functionality is improved, but display quality deteriorates
Solution Approach 1:
The display is divided into two distinct areas: the first display area maintains normal high pixel density for high-quality display, while the second display area has reduced pixel density optimized for light transmittance. This segmentation ensures that the reduction in pixel density is localized only where needed for optical device functionality, while the majority of the screen maintains high display quality.
Solution Approach 2:
The second display area is specifically designed with different pixel density and wire routing characteristics tailored for light transmittance, while the first display area maintains standard display quality. The boundary between these areas is managed to ensure seamless visual transition, and the reduced pixel density is applied only in the localized region where optical devices require high light transmission.
3Manufacturing precision
If wire density is increased to maintain display resolution, then display quality is improved, but light transmittance deteriorates
Solution Approach 1:
The wire routing is segmented into different patterns for the first and second display areas. In the second display area, wires are routed with larger spacing, reduced density, and optimized paths that minimize obstruction of light transmission. This segmentation allows the first display area to maintain high wire density for display resolution while the second display area prioritizes light transmittance for optical device functionality.
Solution Approach 2:
Wire density and routing characteristics are locally optimized in the second display area to maximize light transmittance. The wire spacing, thickness, and routing patterns are specifically adjusted in this region to minimize light blockage, while the first display area maintains standard wire density for high display resolution. This local optimization ensures that wire density is reduced only where it conflicts with light transmission requirements.
Data Source
AI summary
A screen includes a substrate and a display layer located on top of the substrate. The display layer includes a primary display area and a secondary display area. A form of pixel distribution in the secondary display area differs from that in the primary display area.