Portable Terminal Gesture Triggering With 3-Axis Sign Detection
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Solution Overview
Problem
Existing techniques for operating imaging devices using smartphones require complex patterns of movement, making them difficult for users to operate intuitively.
Innovation Solution
A motion information detecting unit generates a trigger signal when a positive/negative sign of motion information in one axis differs from the remaining two axes, allowing for simple gestures like taps and flips to control the device, including still image capture and video playback functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If complex movement patterns are used to operate imaging devices, then device functionality can be controlled, but ease of operation deteriorates
Solution Approach 1:
The patent changes the parameter for gesture recognition from complex multi-axis movement patterns to simple single-axis acceleration threshold detection. By monitoring only whether acceleration exceeds a threshold in at least one of the three axial directions, the system achieves intuitive operation without requiring users to perform complex movement sequences.
Solution Approach 2:
The patent segments the gesture detection process into independent axial direction evaluations. Instead of analyzing complex overall movement patterns, the system independently evaluates acceleration in each of the three axial directions (x, y, z) and triggers based on simple threshold comparison in at least one axis, thereby simplifying the operational requirement.
2Ease of operation
If simple gestures are implemented, then ease of operation improves, but measurement precision deteriorates
Solution Approach 1:
The patent introduces an acceleration threshold parameter to maintain measurement precision despite gesture simplification. By comparing acceleration values against a predetermined threshold in each axial direction, the system can reliably distinguish intentional gestures from normal handheld movements, ensuring accurate detection even with simple tap or flip gestures.
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 users to operate portable terminals with intuitive gestures, simplifying the control of imaging and video functions without requiring complex movement patterns.
Implementation Method 1
a motion information detecting unit for detecting motion information in each of three axial directions of a coordinate system having the portable terminal as an origin
Data Source
AI summary
A trigger signal generating apparatus according to an aspect of the present invention for generating a trigger signal indicating a timing when a gesture is performed on a portable terminal, the trigger signal generating apparatus includes a motion information detecting unit for detecting motion information in each of three axial directions of a coordinate system having the portable terminal as an origin, and a trigger signal generating unit for generating the trigger signal at a timing when a positive/negative sign of one of three pieces of motion information detected by the motion information detecting unit becomes different from the remaining two positive/negative signs.