Touch Display Substrate Layout for Full-Screen Camera Touch Regions
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Solution Overview
Problem
The challenge in full-screen mobile phones is the lack of touch functionality in the light-transmitting display region, which is typically occupied by the camera area, affecting usability and reliability.
Innovation Solution
A touch display substrate design with distinct first and second display regions, incorporating different touch assemblies and display structures, including specific arrangements of touch and pixel circuits, electrodes, and connecting lines to enable seamless touch functionality across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a light-transmitting display region is designed for camera placement in full-screen mobile phones, then the display area is maximized, but the touch functionality is lost in that region
Solution Approach 1:
The light-transmitting display region is designed to serve dual purposes: it allows camera light transmission while also providing full touch functionality. By integrating both imaging and touch interaction capabilities in the same region, the display structure achieves multi-functionality, resolving the contradiction between maximizing display area and maintaining touch operation.
Solution Approach 2:
The touch structure is segmented into multiple layers including transparent touch electrodes and connecting lines that are specifically designed to be visually imperceptible. This segmentation allows the touch functional elements to be distributed across different layers, enabling touch operation in the light-transmitting region without compromising optical performance.
2Ease of operation
If transparent touch electrodes and connecting lines are used in the light-transmitting display region, then touch functionality is enabled, but the optical performance may be degraded
Solution Approach 1:
The touch electrodes and connecting lines are designed with locally optimized properties: they use transparent materials with high light transmittance in the light-transmitting display region, while maintaining appropriate conductivity for touch functionality. The structural parameters such as line width and material composition are locally adjusted to balance optical and electrical requirements.
Solution Approach 2:
The touch electrodes and connecting lines are designed to be visually imperceptible by matching the optical properties of the surrounding display medium. The transparent materials are selected to have refractive indices and absorption characteristics that minimize visual contrast, making the functional elements invisible while maintaining their electrical functionality.
3Ease of operation
If different touch assemblies are used in first and second display regions, then touch functionality is optimized for each region, but the device complexity increases
Solution Approach 1:
The touch structure is segmented into multiple functional layers including transparent touch electrodes, transparent connecting lines, and opaque connecting lines. This segmentation allows different regions to utilize appropriate portions of the layered structure, enabling region-specific optimization while maintaining an integrated overall architecture that manages complexity.
Solution Approach 2:
The solution moves from a planar single-layer touch electrode design to a multi-dimensional layered structure. By stacking transparent and opaque connecting lines at different depths and positions, the patent creates a three-dimensional arrangement that enables regional optimization without proportionally increasing manufacturing complexity.
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.