Segmented Touch Electrodes Integrated Into Display Panel
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Solution Overview
Problem
Conventional electronic devices with displays face challenges in integrating supplemental features like touch sensing, touch pressure sensing, and tactile feedback without compromising display quality, often resulting in increased thickness and weight due to separate components, and issues like parasitic capacitance that cause visual defects.
Innovation Solution
A display panel configuration with segmented electrode blocks over the display area, where transparent electrode blocks communicate with a touch driver via common signal lines, forming a planar surface with a lower planarization layer to reduce thickness and weight, and integrate touch sensing functionality without disrupting display operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate touch panel is placed on the display panel, then touch-sensing functionality is provided, but the thickness and weight of the display panel increase
Solution Approach 1:
The patent integrates the touch sensor components directly into the display panel structure by forming touch-sensing lines and touch-driving lines within the same substrate that contains display pixels. This merging of touch-sensing functionality into the display panel eliminates the need for a separate touch panel overlay, thereby reducing overall weight while maintaining touch capability.
Solution Approach 2:
The patent creates a multi-functional substrate that simultaneously serves as both the display panel and the touch sensor base. The same substrate that displays images also carries the touch-sensing and touch-driving line networks, allowing one component to perform multiple functions (display and touch sensing) without requiring additional separate layers.
2Adaptability or versatility
If a separate touch panel is placed on the display panel, then touch-sensing functionality is provided, but the thickness of the display panel increases
Solution Approach 1:
The touch-sensing lines and touch-driving lines are formed within the same substrate plane as the display pixels, merging the touch sensor functionality into the display panel's existing structure. This integration eliminates the need for additional thickness from separate touch panel layers while maintaining full touch-sensing capability.
3Weight of stationary object
If components for touch-sensing are integrated within the display panel, then thickness and weight are reduced, but parasitic capacitance generates visual defects
Solution Approach 1:
The substrate is divided into discrete display pixel regions and touch sensor line regions, with spatial separation between the functional elements. The touch-sensing lines and touch-driving lines are routed through specific regions that minimize overlap and interaction with display pixels, segmenting the functional areas to reduce unwanted parasitic capacitance while maintaining integration benefits.
Solution Approach 2:
Different regions of the substrate are designed with different functional qualities: display pixel regions optimized for light emission/transmission and touch line regions optimized for signal conduction. The touch-sensing and touch-driving lines are positioned and configured in specific local areas where they can perform their function while minimizing interference with display quality, creating locally optimized zones for each function.
Data Source
AI summary
A display of an electric device includes a plurality of separated transparent electrode blocks, which are configured to provide one or more of supplemental features such as touch recognition. Signal paths between the transparent electrode blocks and the driver for the supplemental feature are implemented with a plurality of conductive lines placed under positioned under one or more planarization layers. The conductive lines implementing the signal paths are routed across the display area, directly toward a non-display area where drive-integrated circuits are located.