Display Substrate Wiring Structure for Uniform Under-Screen Sensing
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Solution Overview
Problem
Current display substrates with under-screen sensors face issues of non-uniform light transmittance and light reflection, affecting the performance of sensors like cameras due to varying Pixels Per Inch (PPI) and complex wire arrangements, leading to difficulties in accurate image capture and sensing operations.
Innovation Solution
A display substrate design with a first display region and a second display region that do not overlap, featuring staggered signal transmission lines and dummy wires, optimized wire layout, and transparent conductive materials to enhance light transmittance and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex wire arrangements are used to connect light-emitting elements and pixel circuits, then electrical connectivity is achieved, but light transmittance uniformity deteriorates and light reflection increases
Solution Approach 1:
The display region is divided into a first display region containing only light-emitting elements and a second display region containing only pixel circuits, with staggered wire projections reducing wire density in the first region to improve light transmittance uniformity
Solution Approach 2:
Wires are arranged in multiple layers with staggered projections between layers, utilizing the vertical dimension to reduce horizontal wire density and minimize light reflection while maintaining electrical connectivity
2Manufacturing precision
If higher PPI is used to improve display resolution, then image quality improves, but light transmittance uniformity deteriorates due to increased wire density
Solution Approach 1:
The display is segmented into two functional regions: a first region optimized for light transmission with minimal wire projections, and a second region containing pixel circuits, allowing high PPI without compromising light transmittance uniformity
Solution Approach 2:
Different regions of the display have different wire densities and structures - the first display region has staggered, sparser wire projections for optimal light transmission, while the second region has denser wiring for circuit functionality
3Adaptability or versatility
If more wires are added to connect additional display elements, then display functionality increases, but light reflection and sensor performance deteriorate
Solution Approach 1:
Functional segmentation separates light-emitting elements from pixel circuits into different display regions, reducing wire projections in the first region to minimize light reflection and improve under-screen sensor performance while maintaining full display functionality
Solution Approach 2:
Multiple wire layers with staggered projections act as intermediaries to provide necessary electrical connectivity while reducing the overall wire density and light reflection in the first display region where sensors are located
Data Source
AI summary
The display substrate includes a display region; the display region includes a first display region and a second display region; the first display region includes at least one first light-emitting element, and the first display region allows light from the first side to be at least partially transmitted to the second side; the second display region includes at least one first pixel circuit, and the first light-emitting element is electrically connected with the first pixel circuit; the display substrate is provided with at least one signal transmission line and at least one first dummy wire; an orthographic projection of the first dummy wire on a plane parallel to the display substrate and an orthographic projection of the signal transmission line on the plane parallel to the display substrate are at least partially staggered.