Touch Screen Force Sensing and Haptic Feedback Control
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Solution Overview
Problem
Current touch screen technologies do not effectively account for the force of user input, limiting the precision and feedback in interactions, particularly in haptic feedback systems.
Innovation Solution
A method and device that calculate a force value corresponding to user input on a touch screen, using sensors and feedback elements to adjust haptic feedback based on the applied force, distance, or threshold values, enabling more nuanced and responsive user interactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional touch screen technology is used without force sensing, then the device structure remains simple, but the precision of user input detection and quality of haptic feedback are limited
Solution Approach 1:
The patent combines force sensing capability with the existing touch screen interface by integrating force sensors into the touch screen structure. This merging allows the system to detect both touch position and applied force using a unified interface, improving measurement precision without requiring separate force input devices.
Solution Approach 2:
The touch screen interface is enhanced to serve multiple functions: it detects both conventional touch interactions and force magnitude. This multi-functionality allows the same interface to provide both positional information and force information, enabling precise user input detection while maintaining structural simplicity.
2Adaptability or versatility
If force sensing is added to touch screen, then haptic feedback quality improves, but the device complexity increases
Solution Approach 1:
The haptic feedback system is made dynamic by adjusting feedback characteristics based on the detected force magnitude. The system adapts its response in real-time according to user input force, enabling versatile haptic feedback that responds proportionally to different levels of user engagement while using a unified sensing mechanism.
Solution Approach 2:
The system implements a feedback loop where force detection informs haptic feedback generation. The detected force magnitude is used to modulate the haptic feedback response, creating an adaptive system that provides appropriate tactile feedback based on user input intensity, thereby improving feedback adaptability.
3Measurement precision
If force value calculation is implemented, then user interaction precision improves, but processing complexity increases
Solution Approach 1:
The system performs preliminary force value calculation by comparing the detected force magnitude against predefined threshold values. This preliminary processing step converts raw force data into meaningful interaction states (such as light press, firm press, hard press), improving user input precision while keeping processing complexity manageable through structured comparison logic.
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
Enhances user interaction by providing proportional and adaptive haptic feedback, improving the user experience in applications like gaming and multimedia devices by accounting for the force and distance of user input, thereby simulating physical interactions more accurately.
Implementation Method 1
Several haptic technologies are available now, including but not limited to vibration motor actuation
Implementation Method 2
Several haptic technologies are available now, including but not limited to vibration motor actuation, piezoelectric actuation
Data Source
AI summary
The invention relates to a method and an electric device comprising a screen, cooperating with said screen a sensor for detecting a presence of an object on or close to said screen, a controller and a feedback element. The controller is configured to interpret said presence of the object and calculate a force value and control said feedback element to provide a feedback with respect to the force value.