Optical Touch Device Automatic Mode Switching

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Current optical touch devices require additional operations for users to switch between touch and gesture modes, which is inconvenient.

Innovation Solution

An optical touch device with left-side and right-side sensors that determine the number of peaks in sensing waveforms to switch between touch and gesture modes, using variance calculations to identify user gestures.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the optical touch device supports both touch and gesture operations, then the device functionality is improved, but the device complexity increases due to requiring additional operations to switch between modes

Engineering Contradiction:

Improvedevice functionalityVSAvoidoperation complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The system automatically detects the number of fingers touching the panel and self-switches between touch mode (1-2 fingers) and gesture mode (3+ fingers) without requiring manual mode switching operations from the user

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The system changes its operational parameters (mode switching) based on the detected parameter (number of fingers), automatically transitioning between different operational states depending on user input

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the optical touch device uses automatic mode switching based on number of fingers, then the ease of operation is improved, but the measurement precision for gesture recognition may be affected

Engineering Contradiction:

Improvemode switching convenienceVSAvoidgesture recognition accuracy

Core Design Contradiction:

Ease of operationVSMeasurement precision

Solution Approach 1:

The system continuously monitors the number of fingers detected and provides feedback by automatically switching modes, ensuring that gesture recognition only activates when the appropriate number of fingers are detected, thereby maintaining precision

Inventive Principle:

Principle #23Feedback

Solution Approach 2:

The system performs preliminary detection of the number of fingers before enabling gesture recognition mode, ensuring that gestures are only recognized when the correct number of fingers are present, preventing misidentification

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS9645734B2Optical touch devices and operation method thereof

Publication Date: 2017.05.09 WISTRON CORP

AI summary

An embodiment of the disclosure provides an operation method for an optical touch device. The optical touch device includes a panel, a left-side sensor and a right-side sensor. The operation method includes the steps of: sensing a sensing waveform on the panel; determining the number of peaks of the sensing waveform to control the optical touch device to be switched to a gesture mode or a touch mode; estimating a first variance according to a first sensing waveform sensed by the left-side sensor and a second variance according to a second sensing waveform sensed by the right-side sensor when the optical touch device is operating in the gesture mode; and determining the gesture made by the user according to the first variance and the second variance.