Touch Panel Pressure Estimation via Stereo Image Analysis
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing touch control systems require additional pressure sensors to estimate pressure change, increasing costs and complexity, while users expect haptic feedback based on pressure levels.
Innovation Solution
An optically-detected input image system using left and right image-capturing devices to calculate pressed-area parameters and determine pressure changes by comparing image data, allowing for the estimation of pressure increase or decrease without additional sensors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional pressure sensor is used for sensing the tendency of pressure change, then the measurement precision of pressure change is improved, but the cost increases
Solution Approach 1:
The existing image-capturing devices are made to serve dual purposes: their primary function of capturing touch position is combined with a secondary function of estimating pressure change through pressed-area parameter calculation, eliminating the need for dedicated pressure sensors
Solution Approach 2:
The system uses its own existing image-capturing resources to estimate pressure change, making the system self-sufficient without requiring external additional sensors, thereby reducing cost while maintaining measurement capability
2Measurement precision
If an additional pressure sensor is used for sensing the tendency of pressure change, then the measurement precision of pressure change is improved, but the device complexity increases
Solution Approach 1:
The image-capturing devices perform both touch position detection and pressure change estimation, reducing the number of separate components and simplifying the overall system architecture
Solution Approach 2:
The pressure estimation function is merged into the existing image processing pipeline by calculating pressed-area parameters from image data, combining multiple functions into a unified processing flow
Data Source
AI summary
A method and a system for estimating the tendency of pressure change on a touch panel are disclosed. The method includes: getting first left-image data and first right-image data by using a left image-capturing device and a right image-capturing device at a first time, respectively; calculating first estimation pressed-area parameter according to the first left-image data and the first right-image data; getting second left-image data and second right-image data by using the left image-capturing device and the right image-capturing device at a second time, respectively; calculating second estimation pressed-area parameter according to the second left-image data and the second right-image data; and compare the first estimation pressed-area parameter with the second estimation pressed-area parameter.