Touch Driver Sensitivity Adjustment for Force Touch
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Solution Overview
Problem
Existing touch panels struggle to accurately determine force touches due to variations in touch area and angle, leading to inconsistent sensitivity and difficulty in distinguishing between force touches and other types of touches, requiring complex compensation algorithms.
Innovation Solution
An apparatus for driving a touch panel that includes a touch driver which senses force touches and adjusts sensitivity based on user-set touch mode information, utilizing a force sensor member with piezo-resistive materials and elastic resistor patterns to generate touch force data and differentiate touch types.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a force-sensing material is disposed between electrodes to sense force touch based on distance change, then force touch sensing capability is improved, but measurement precision deteriorates when touch area is enlarged or touch angle varies
Solution Approach 1:
The force sensor is divided into multiple sensing regions (first sensing region and second sensing region) with different sensitivity characteristics. The first sensing region has higher sensitivity for small touch areas, while the second sensing region has lower sensitivity for large touch areas. This segmentation allows the system to maintain measurement precision across varying touch areas and angles by selecting the appropriate sensing region based on the detected touch characteristics.
Solution Approach 2:
The patent changes the sensitivity parameter of different sensing regions to adapt to varying touch conditions. By configuring the first sensing region with higher sensitivity and the second sensing region with lower sensitivity, the system can adjust its response characteristics based on the actual touch scenario, thereby maintaining accurate force touch detection regardless of touch area size or angle variations.
2Adaptability or versatility
If touch sensitivity is adjusted to accommodate different touch areas, then adaptability is improved, but device complexity increases due to need for complicated compensation algorithms
Solution Approach 1:
The patent pre-configures multiple sensing regions with different sensitivity characteristics during the manufacturing process. Instead of requiring complex real-time compensation algorithms to adjust for varying touch areas, the system has already prepared multiple sensitivity profiles in advance. The controller simply needs to select the appropriate sensing region based on detected touch characteristics, dramatically reducing computational complexity while maintaining adaptability.
Solution Approach 2:
The patent implements a dynamic switching mechanism between different sensing regions based on real-time touch detection. The controller dynamically selects which sensing region to use based on the detected touch area and characteristics, allowing the system to adapt to different touch scenarios without requiring complex compensation calculations. This dynamic approach simplifies the control algorithm while maintaining high adaptability.
3Reliability
If the same force is applied to the touch panel, then force consistency is improved, but force touch determination accuracy deteriorates due to different touch areas and angles
Solution Approach 1:
The patent applies the local quality principle by creating sensing regions with different local sensitivity characteristics. The first sensing region is optimized for detecting small touch areas with higher sensitivity, while the second sensing region is optimized for larger touch areas with lower sensitivity. This local differentiation allows the system to accurately determine force touches regardless of the overall touch area or angle, as each region is specifically tailored to its intended detection scenario.
Solution Approach 2:
The patent changes the sensitivity parameter across different sensing regions to compensate for variations in touch area and angle. By configuring the first sensing region with higher sensitivity and the second sensing region with lower sensitivity, the system can maintain consistent force touch determination accuracy across different touch scenarios without being affected by changes in touch area or angle.
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
The solution allows for accurate determination of force touches without complex algorithms, personalizing sensitivity settings for improved touch recognition and reducing errors in touch area calculations.
Implementation Method 1
utilizing a force sensor member with piezo-resistive materials and elastic resistor patterns to generate touch force data
Data Source
AI summary
An apparatus for driving a touch panel can include a touch panel for sensing a force touch of a user input, and a touch driver for sensing the force touch from the touch panel and generating touch force data, in which the touch driver adjusts a sensitivity of the touch force data, based on touch mode information set by the user.