Integrated Touch Pressure Sensing Layer
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Solution Overview
Problem
Current terminals require an independent pressure sensing layer to achieve pressure sensing performance, which increases the thickness of the device.
Innovation Solution
A touch panel with a flexible substrate, a first electrode, a second electrode, a touch chip, and a pressure sensing chip, where the first electrode's shape and resistance value correlate with the substrate's deformation, allowing for simultaneous touch and pressure sensing without an additional pressure sensing layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an independent pressure sensing layer is added to achieve pressure sensing performance, then pressure sensing capability is improved, but device thickness increases
Solution Approach 1:
The patent merges the touch sensing layer and pressure sensing layer into a single integrated structure. The touch sensing layer includes both a first electrode and a second electrode that work together to provide both touch detection (through capacitance changes) and pressure detection (through resistance changes) functions, eliminating the need for a separate pressure sensing layer and thereby reducing device thickness.
Solution Approach 2:
The touch sensing layer is designed to perform multiple functions: it detects touch operations through capacitance changes between the first and second electrodes, and simultaneously detects pressure operations through resistance changes in the first electrode. This multi-functionality allows a single layer to replace what would traditionally require separate dedicated layers.
2Adaptability or versatility
If a touch layer and independent pressure sensing layer are both provided, then both touch and pressure sensing performances are achieved, but device structure complexity increases
Solution Approach 1:
The patent combines the touch sensing layer and pressure sensing layer into one integrated touch sensing layer structure, reducing the number of separate layers and simplifying the overall device structure while maintaining both touch and pressure sensing capabilities.
Solution Approach 2:
The first electrode and second electrode in the touch sensing layer are designed to serve dual purposes: detecting touch operations through capacitance changes and detecting pressure operations through resistance changes. This multi-functional design reduces structural complexity compared to having separate dedicated layers for each sensing type.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables pressure sensing performance without the need for an independent pressure sensing layer, reducing device thickness while allowing for both touch and pressure sensing capabilities.
Implementation Method 1
A resistance value of the first electrode is correlated with a shape variable of the shape of the first electrode
Implementation Method 2
The second electrode is insulated from the first electrode to form a capacitor. The touch chip is electrically connected to the first electrode and the second electrode to identify a touch operation according to a change in a capacitance value of the capacitor
Data Source
AI summary
A touch panel and a display device are provided to simultaneously implement touch and pressure sensing performances through a first electrode and a second electrode, such that the pressure sensing performance can be realized without adding an independent pressure sensing layer in a terminal. This solves a technical problem that a current terminal needs to increase the independent pressure sensing layer to realize the pressure sensing performance.