Input Sensing Device with Multi-Directional Pressure Electrodes
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Solution Overview
Problem
Existing electronic devices with integrated touch sensors struggle to accurately recognize touch pressure due to limitations in current pressure sensing technologies, which affect the precision and reliability of input detection.
Innovation Solution
The development of an input sensing device with a specific electrode configuration, including first and second electrode members and pressure sensing electrodes, arranged in a manner that allows for improved touch pressure recognition, featuring a base layer with first and second sensing electrodes connected in series and insulated pressure sensing electrodes with branch electrodes extending in different directions to enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If existing pressure sensing technologies are used in integrated touch sensors, then the device can detect touch position, but the recognition accuracy of touch pressure is insufficient
Solution Approach 1:
The pressure sensing electrode is divided into multiple sensing cells (first sensing cell with first branch electrodes, second sensing cell with second branch electrodes, third sensing cell, and fourth sensing cell) that are arranged in different directions and connected in series. This segmentation allows the sensor to detect pressure from multiple directions independently, improving both the accuracy and reliability of touch pressure recognition by capturing pressure components along different axes.
Solution Approach 2:
The patent introduces branch electrodes extending in a third direction that intersects the first and second directions, and a fourth direction that intersects all three previous directions. This multi-dimensional electrode arrangement enables the sensor to detect pressure components from multiple spatial dimensions, transforming a simple 2D touch sensor into a 3D pressure-sensitive device that can accurately recognize pressure magnitude regardless of the pressure application direction.
2Measurement precision
If pressure sensing electrodes are added to improve touch pressure detection, then pressure sensing capability is enhanced, but the device thickness increases
Solution Approach 1:
The patent combines multiple sensing cells with different electrode orientations into a single integrated pressure sensing electrode structure. The first, second, third, and fourth sensing cells are disposed within the same first opening of the first sensing electrode and connected in series, merging multiple detection functions into one compact component. This integration maintains thin device profile while achieving enhanced pressure sensing capability through the collaborative work of multi-directional branch electrodes.
3Measurement precision
If multiple sensing cells with different electrode arrangements are used, then pressure sensing accuracy is improved, but the device complexity increases
Solution Approach 1:
The patent designs a universal pressure sensing electrode structure where multiple sensing cells with different branch electrode arrangements (first, second, third, and fourth directions) are integrated into a single component. This multi-functional design allows the same electrode structure to detect pressure from any direction in 3D space, eliminating the need for separate sensors for different pressure directions and simplifying the overall device architecture while maintaining high sensing accuracy.
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
This configuration enables improved recognition accuracy of touch pressure and allows for the implementation of a thin-type input sensing device, preventing image quality reduction and ensuring accurate pressure sensing regardless of the pressure application direction.
Implementation Method 1
a first pressure sensing electrode disposed in the first opening, the first pressure sensing electrode being insulated from the first sensing electrodes and the second sensing electrodes. The first pressure sensing electrode includes a first sensing cell and a second sensing cell.
Data Source
AI summary
An input sensing device includes a base layer. A first electrode member includes first sensing electrodes arranged along a first direction on the base layer. Each of the first sensing electrodes includes a first opening exposing the base layer. A first pressure sensing electrode is disposed in the first opening and is insulated from the first sensing electrodes. The first pressure sensing electrode includes a first sensing cell and a second sensing cell. The first sensing cell includes first branch electrodes each extending in a third direction. The second sensing cell includes second branch electrodes each extending in a fourth direction intersecting the third direction.