Tactile Signal Shaping for Voltage-Limited Haptic Presentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tactile sense presentation devices face limitations in generating appropriate tactile stimuli due to an upper limit on the drive voltage that can be output to actuators, leading to potential failures when the calculated drive voltage exceeds this limit.
Innovation Solution
A tactile sense presentation device and method that includes a signal processing unit to calculate and adjust drive voltage signals within a preset range by reducing components of specific frequency bands, ensuring the actuators operate within their voltage limits, thereby generating accurate tactile stimuli.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the drive voltage signal is calculated based on the inverse matrix of transfer characteristic to achieve accurate tactile stimulus presentation, then the tactile stimulus accuracy is improved, but the drive voltage may exceed the upper limit of the actuator
Solution Approach 1:
The patent applies dynamics by making the drive voltage signal adjustable and adaptive. The signal processing unit dynamically modifies the drive voltage signal based on the actuator's voltage limits, transforming a static calculation approach into a dynamic control system that ensures reliable operation while maintaining tactile accuracy
Solution Approach 2:
The patent changes the parameters of the drive voltage signal by adjusting its amplitude and frequency components. The signal processing unit modifies the signal parameters to ensure the drive voltage remains within the actuator's upper limit while still achieving the desired tactile stimulus effect
2Force
If the drive voltage signal amplitude is increased to enhance tactile stimulus intensity, then the tactile stimulus effect is improved, but the drive voltage exceeds the preset voltage range
Solution Approach 1:
The patent applies partial action by selectively adjusting only the excessive voltage components of the drive signal while preserving the essential tactile stimulus components. The signal processing unit identifies and modifies only the portions of the signal that exceed voltage limits, maintaining maximum effective stimulus within safe operating parameters
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
Enables the generation of appropriate tactile stimuli within a preset voltage range, ensuring effective and reliable operation of the tactile sense presentation device.
Implementation Method 1
an actuator (103) installed on the touch panel (101) and vibrating the touch panel (101)
Data Source
AI summary
A tactile sense presentation device calculates a first drive voltage signal by using a target vibration preset to correspond to a touch position and a vibration transfer characteristic up to the touch position through an actuator, and reduces components of a first frequency band of the first drive voltage signal less than a preset frequency to calculate a second drive voltage signal within a preset voltage range, whereby vibration presenting appropriate tactile stimulus to a user can be generated within the preset voltage range.