Segmented Transparent Electrodes for Touch Sensing in Display Panels
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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, due to issues such as parasitic capacitance and visual defects caused by additional components.
Innovation Solution
A configuration of segmented electrode blocks over the display area, using transparent electrode blocks connected via common signal lines, which also serve as touch sensors, allowing for touch input recognition while minimizing the need for separate touch panels and reducing the thickness and weight of the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If separate touch panel and display panel are used, then touch sensing functionality is achieved, but thickness and weight increase
Solution Approach 1:
The patent merges the touch sensing panel and display panel into a single integrated structure where the common electrode layer serves dual purposes as both the display common electrode and the touch sensing electrode. This eliminates the need for separate touch panel components, thereby reducing overall weight while maintaining both display and touch sensing functionalities.
Solution Approach 2:
The common electrode layer is designed to perform multiple functions simultaneously: it acts as the common electrode for display operation and as the touch sensing electrode for detecting user input. This multi-functionality allows the system to achieve touch sensing capability without adding separate components that would increase weight.
2Adaptability or versatility
If separate touch panel and display panel are used, then touch sensing functionality is achieved, but thickness increases
Solution Approach 1:
The patent merges the touch sensing panel and display panel into a single integrated structure where the common electrode layer serves dual purposes as both the display common electrode and the touch sensing electrode. This eliminates the need for separate touch panel components, thereby reducing overall thickness while maintaining both display and touch sensing functionalities.
Solution Approach 2:
The common electrode layer is designed to perform multiple functions simultaneously: it acts as the common electrode for display operation and as the touch sensing electrode for detecting user input. This multi-functionality allows the system to achieve touch sensing capability without adding separate components that would increase thickness.
3Adaptability or versatility
If conductive lines are added for touch sensing, then touch sensing functionality is achieved, but visual defects occur due to parasitic capacitance
Solution Approach 1:
The patent extracts the touch sensing functionality from separate conductive lines and integrates it into the existing common electrode layer. By using the common electrode layer itself as the touch sensing element, the need for additional conductive lines is eliminated, thereby avoiding the parasitic capacitance issues that would cause visual defects such as line dim and moiré effects.
Solution Approach 2:
The common electrode layer is designed to perform multiple functions simultaneously: it acts as the common electrode for display operation and as the touch sensing electrode for detecting user input. This multi-functionality allows the system to achieve touch sensing capability without adding separate conductive lines that would generate parasitic capacitance and cause visual defects.
4Adaptability or versatility
If separate components are integrated within display panel, then touch sensing functionality is achieved, but operation becomes complicated
Solution Approach 1:
The patent merges the touch sensing functionality into the existing display panel structure by using the common electrode layer for both display and touch sensing purposes. This integration approach simplifies the overall system operation compared to managing separate touch panel components, as it reduces the number of independent systems that need to be coordinated and controlled.
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.