Touch Display Haptics for Texture and Friction Simulation
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Solution Overview
Problem
Existing haptic feedback technologies in virtual reality and human-computer interaction systems fail to effectively simulate the texture and friction of visual objects, limiting the richness of user interaction experiences.
Innovation Solution
A haptic feedback method and device that utilizes an actuator assembly and a touch display panel to generate drive signals based on touch and display information, adjusting vibration patterns to replicate surface characteristics such as friction and texture, using piezoelectric materials to create standing wave vibrations and squeeze air film effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional haptic feedback technologies are used, then the basic vibration function is achieved, but the texture and friction simulation capability is insufficient
Solution Approach 1:
The patent applies local quality by differentiating drive signals based on the specific display object being touched. Different display objects (e.g., buttons, sliders, textured surfaces) receive customized vibration patterns that match their intended tactile characteristics, enabling accurate simulation of diverse surface textures and friction properties across different locations on the display panel
Solution Approach 2:
The patent implements dynamics through adaptive modulation of drive signal parameters in real-time based on touch feedback. The system dynamically adjusts vibration frequency, amplitude, and pattern according to the detected touch position, pressure, and the corresponding display object characteristics, enabling responsive and accurate haptic feedback that adapts to user interaction
2Measurement precision
If drive signals are generated based on touch and display information, then haptic feedback accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies universality by using a single actuator assembly to generate multiple types of haptic feedback patterns. The same actuator can produce various vibration modes (high-frequency vibration, low-frequency vibration, standing waves) by modulating the drive signal, eliminating the need for multiple specialized actuators while maintaining high haptic feedback accuracy
Solution Approach 2:
The patent implements parameter changes by transforming complex haptic effects into modifications of basic vibration parameters. Instead of using complex mechanical structures, the system achieves diverse tactile sensations by dynamically adjusting electrical parameters (frequency, amplitude, duty cycle) of the drive signal sent to the actuator, simplifying the overall device architecture
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 accurately simulating the tactile impressions of visual objects, providing a more realistic and immersive haptic experience.
Implementation Method 1
the actuator assembly drives the touch display panel to vibrate and form haptic feedback on a surface of the touch display panel
Implementation Method 2
using piezoelectric materials to create standing wave vibrations
Implementation Method 3
using piezoelectric materials to create standing wave vibrations and squeeze air film effects
Data Source
AI summary
A haptic feedback method and a haptic feedback device. The haptic feedback method is applied to the haptic feedback device including a touch display panel and an actuator assembly, and the haptic feedback method includes: acquiring touch information and display information on the touch display panel, the touch information includes a touch position of a touch object on the touch display panel, the display information includes information of a display object displayed on the touch display panel, and the touch position is within the display object; and generating a driving signal according to the touch information, the display information, and surface characteristic parameters of the display object, the driving signal output to the actuator assembly, so that the actuator assembly drives the touch display panel to vibrate and form haptic feedback on the surface of the touch display panel.