Wrist Rolling Gesture Input for Spatial Pointer Control
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Solution Overview
Problem
Current body-wearable spatial information input devices face limitations in generating precise button events due to unintended input from inertial sensors, leading to focus shaking and inaccurate positioning, especially when physical buttons are not available.
Innovation Solution
An apparatus and method that utilize an inertial sensor unit to sense wrist rolling and hand motion, determining events such as pointer activation, stopping, left click, and right click, and calculating coordinate displacement to transmit control commands and feedback, enabling accurate input events.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If body attachable spatial information input apparatus is used without physical buttons, then portability and ease of operation are improved, but input precision and reliability deteriorate due to unintended inputs from inertial sensors
Solution Approach 1:
The patent segments the input detection into two independent parts: wrist rolling detection for button events and hand motion detection for coordinate displacement. This segmentation allows each sensor to be optimized for its specific function, with the inertial sensor dedicated to detecting wrist rolling gestures for pointer activation and clicking, while coordinate calculation is based on hand motion rather than inertial sensor output alone.
Solution Approach 2:
The patent introduces an intermediary coordinate calculation unit that processes hand motion data to generate coordinate displacement. This intermediary layer filters out unintended inputs from the inertial sensor while preserving intentional hand movements, thereby maintaining input precision without sacrificing the portability benefits of a buttonless design.
2Device complexity
If inertial sensor output is used directly for button events, then device complexity is reduced, but measurement precision deteriorates due to shaking and unintended inputs
Solution Approach 1:
The patent divides the input processing into separate functional units: event determination unit for button events based on wrist rolling, and coordinate calculation unit for pointer position based on hand motion. This segmentation allows each unit to be optimized independently, with the event determination unit focusing on detecting intentional wrist gestures while filtering out shaking.
Solution Approach 2:
The system incorporates feedback mechanisms where the event determination unit analyzes patterns of wrist rolling to distinguish intentional button press gestures from unintentional shaking. By monitoring the characteristics and timing of inertial sensor outputs, the system can filter out noise and confirm genuine user intent before generating button events.
3Ease of operation
If wrist rolling is used for pointer activation and clicking, then ease of operation is improved, but device complexity increases due to additional sensor processing requirements
Solution Approach 1:
The inertial sensor unit serves multiple functions: detecting wrist rolling for pointer activation, detecting wrist rolling for clicking, and detecting hand motion for coordinate calculation. This multi-functionality reduces the need for separate sensors or processing systems, thereby managing complexity while enabling diverse input methods.
Solution Approach 2:
The patent merges the detection of wrist rolling and hand motion into a unified processing framework where both inputs are captured by the inertial sensor unit and processed together by the event determination and coordinate calculation units. This integration streamlines the system architecture while maintaining the ability to distinguish between different gesture types.
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 precise generation of left and right click events and pointer activation/stopping by accurately sensing wrist rolling and hand motion, reducing unintended inputs and improving usability in various environments.
Implementation Method 1
an inertial sensor unit configured to sense a rolling of a wrist and a motion of a hand; the inertial sensor unit may measure a slope, acceleration, angular velocity according to the rolling of the wrist and the motion of the hand
Data Source
AI summary
Disclosed are an apparatus and a method for inputting events. An embodiment of the present invention can generate left and right click events in addition to activating and stopping pointers by sensing a rolling of a wrist and calculate and output a coordinate displacement according to the motion of the hand at the time of activating the pointers according to the events. Further, the embodiment of the present invention can be applied to a large-sized display or a contactless spatial input apparatus of an HMD, entertainment such as games, and the like, and can overcome restricted environments by a gesture input scheme under special environment.