Display Substrate Data-Line Routing for Under-Display Cameras
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Solution Overview
Problem
Existing display technologies face challenges in achieving a high screen-to-body ratio while maintaining a seamless visual experience, particularly with under-display cameras, as data lines often occupy light transmission areas and increase bezel size, affecting photography quality and visual appeal.
Innovation Solution
A display substrate design featuring a base substrate with separate display areas and bezel areas, where light emitting devices and pixel driving circuits are arranged in an array, with data lines shared between columns to minimize bezel occupation and enhance data signal transfer efficiency, reducing the need for winding data lines in the display area and optimizing bezel space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data lines are arranged in the first display area to connect pixel driving circuits in the bezel area, then data signal transfer is enabled, but the photography effect of under-display cameras is degraded and bezel size increases
Solution Approach 1:
The patent extracts data lines from the first display area (where the under-display camera is located) and relocates them to the second display area. This separation removes the harmful interference of data lines from the camera's light transmission path, thereby improving photography effect while maintaining data signal transfer functionality through the alternative routing path.
2Reliability
If data lines wind through the display area to reach pixel driving circuits in the bezel area, then electrical connection is established, but screen-to-body ratio is reduced and visual experience is degraded
Solution Approach 1:
The patent changes the spatial dimension of data line routing by utilizing the second display area as an alternative path. Instead of winding through the first display area horizontally, data lines are routed through the second display area, effectively using a different spatial dimension to achieve the same electrical connection while preserving the screen-to-body ratio.
3Ease of manufacture
If pixel driving circuits are arranged in the bezel area, then control of first light emitting devices is simplified, but bezel occupation increases and data line routing becomes complex
Solution Approach 1:
The patent segments the display area into a first display area and a second display area, and correspondingly segments the pixel driving circuits into those in the bezel area and those in the second display area. This segmentation allows data lines to serve multiple columns of light emitting devices across both areas, reducing bezel occupation while maintaining control functionality through shared data line resources.
Data Source
AI summary
The display substrate includes: a display area and a bezel area, the display area including a first display area and a second display area; first light emitting devices in the first display area and second light emitting devices in the second display area; first pixel drive circuits in the bezel area and second pixel drive circuits in the second display area, the first pixel drive circuits are connected to the first light emitting devices, and the second pixel drive circuits are connected to the second light emitting devices; and data lines in the second display area, each data line being connected to the first pixel drive circuits and the second pixel drive circuits which are respectively electrically connected to a column of first light emitting devices and a column of second light emitting devices, which are in the same column.