Touch Display Substrate Layout for Under-Screen Camera Touch Sensing
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Solution Overview
Problem
Full-screen mobile phones with camera hidden under the screen face challenges due to the lack of touch functionality in light-transmitting display regions, affecting usability and reliability.
Innovation Solution
A touch display substrate design with distinct first and second display regions, incorporating different touch assemblies and light emitting elements, utilizing transparent wires and electrodes to ensure seamless touch functionality across both regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-transmitting display region is created to hide the camera under the screen, then the front visible region and display effect are improved, but the touch functionality is lost affecting usability
Solution Approach 1:
The display region is divided into a first display region with a first touch assembly and a second display region with a second touch assembly. The first touch assembly includes touch electrodes and touch control circuits disposed in the display structure layer, while the second touch assembly includes touch electrodes disposed in the touch structure layer. This segmentation allows each region to have optimized touch functionality appropriate for its specific requirements.
Solution Approach 2:
The patent introduces a dual-layer touch structure where touch assemblies are disposed at different structural levels. The first touch assembly is integrated within the display structure layer, while the second touch assembly is disposed in the touch structure layer above it. This vertical dimensionality enables both light transmittance and touch functionality to coexist by operating at different structural levels.
2Ease of operation
If different touch assemblies are used in different display regions, then touch functionality is achieved across the entire screen, but the device complexity increases
Solution Approach 1:
Both the first and second touch assemblies utilize touch electrodes as their core sensing element, providing a universal touch detection mechanism across different display regions. The touch control circuits in the first touch assembly and the touch electrodes in the second touch assembly work together to provide comprehensive touch functionality, reducing the need for entirely different sensing mechanisms in each region.
Solution Approach 2:
The second touch assembly, disposed in the touch structure layer, acts as an intermediary that provides touch functionality for the second display region where the first touch assembly is not present. This intermediate layer of touch electrodes bridges the gap between the display structure and the user interface, enabling touch control in regions where direct integration with the display structure is not feasible.
Data Source
AI summary
A touch display substrate and a touch display apparatus are provided. The touch display substrate including: a display region and a non-display region, the display region including a first display region and a second display region, the first display region surrounding at least one side of the second display region; the touch display substrate includes a base substrate and a display structure layer and a touch structure layer disposed on the base substrate sequentially; the first display region includes a first touch assembly, and the second display region includes a second touch assembly; the display structure layer includes multiple pixel circuits located in the first display region and multiple light emitting elements located in the first display region and second display region; the first touch assembly is located in the touch structure layer, and the second touch assembly is located in the display structure layer and/or the touch structure layer.