Display Substrate Wiring Layout for Under-Display Camera Light Transmission
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Solution Overview
Problem
Existing display technologies face challenges in achieving a high screen-to-body ratio without compromising the photographing effect of under-display cameras due to complex data line wiring that occupies light transmission areas and increases bezel size.
Innovation Solution
A display substrate design that shares data lines between first and second pixel driving circuits in the same column, utilizing first and second wires in different directions to optimize wiring, and employs cascaded shift registers to simplify signal transfer, reducing bezel area occupation and enhancing synchronization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If data lines are extended to connect pixel driving circuits in the bezel area, then the display area can be expanded, but the bezel area occupation increases and screen-to-body ratio decreases
Solution Approach 1:
The pixel driving circuits are segmented into two groups: first pixel driving circuits arranged in the bezel area and second pixel driving circuits arranged in the second display area. This segmentation allows data lines to be distributed more efficiently, with some data lines extending into the bezel area only where necessary, thereby reducing overall wiring complexity while maintaining expanded display area.
Solution Approach 2:
The patent utilizes the bezel area as an additional spatial dimension for arranging pixel driving circuits. By placing first pixel driving circuits in the bezel area and connecting them via data lines, the design effectively uses the vertical/dimensional space of the bezel to accommodate wiring without compromising the horizontal display area, thus improving screen-to-body ratio.
2Area of stationary object
If pixel driving circuits are arranged in the bezel area, then more display area is available, but the photographing effect of under-display camera is compromised
Solution Approach 1:
The patent applies local quality by differentiating the arrangement of pixel driving circuits based on location: first pixel driving circuits are placed in the bezel area where they do not interfere with the under-display camera's light transmission path, while second pixel driving circuits are placed in the second display area. This localized arrangement ensures that the camera area maintains optimal optical properties while the display area is maximized.
3Area of stationary object
If data lines extend into the bezel area to connect pixel driving circuits, then display area increases, but light transmission areas are occupied
Solution Approach 1:
The patent extracts the pixel driving circuits from the traditional display area and relocates a portion (first pixel driving circuits) to the bezel area. This extraction allows data lines to be routed away from the central light transmission paths, minimizing obstruction to light and maintaining high illumination intensity in the display area while still enabling expanded display coverage.
Data Source
AI summary
Disclosed are a display substrate and a display device. The display substrate includes: a display area and a bezel area, the display area including a first display area and a second display area; a plurality of light emitting devices, a plurality of pixel driving circuits, a plurality of data lines, and a plurality of first wires in the second display area and extending in a row direction, where all the first wires are located at a plurality of row gaps adjacent to the first display area respectively, each of the plurality of first wires is connected between one data line corresponding to the first display area and one first pixel driving circuit corresponding to the one data line.