Operation Input Unit for Preventing Unintended Motion
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Solution Overview
Problem
Head-mounted displays (HMD) users face difficulties in maintaining proper operation of hand-held operating units, leading to potential mismatched orientations and unintended motion of displayed objects, especially during sudden posture changes or carelessness.
Innovation Solution
An operation input unit with a head-mounted display, an operating unit, a relative-position detecting section, and a control unit that switches between control modes to prevent unintended motion by detecting the relative position between the head-mounted unit and the operating unit, using features like LEDs, image acquisition, and sensors to determine the operator's state and adjust the manipulator's motion accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operator manipulates the operating unit freely, then the ease of operation is improved, but the reliability deteriorates due to unintended motion when the operator changes posture or releases the unit
Solution Approach 1:
The system continuously monitors the relative position between the head-mounted unit and operating unit using the relative-position detecting section, and feeds this information back to the control unit. When the position deviates from the predetermined range, the system automatically switches control modes to limit operating signals, preventing unintended motion while maintaining normal operation during proper use.
Solution Approach 2:
The control mode is dynamically switched between first control mode (full operation freedom) and second control mode (limited operation) based on the real-time relative position detection. This dynamic adjustment allows the system to adapt between maximizing ease of operation and ensuring reliability depending on the operator's actual state.
2Reliability
If the system limits operating signals to prevent unintended motion, then the reliability is improved, but the ease of operation deteriorates due to restricted manipulation
Solution Approach 1:
The control mode is dynamically switched between first control mode (full operation freedom) and second control mode (limited operation) based on the real-time relative position detection. This dynamic adjustment allows the system to adapt between maximizing ease of operation and ensuring reliability depending on the operator's actual state.
Solution Approach 2:
The system continuously monitors the relative position between the head-mounted unit and operating unit using the relative-position detecting section, and feeds this information back to the control unit. When the position deviates from the predetermined range, the system automatically switches control modes to limit operating signals, preventing unintended motion while maintaining normal operation during proper use.
3Ease of operation
If the relative position detection range is set wide, then the ease of operation is improved allowing more freedom, but the measurement precision deteriorates in determining proper operator state
Solution Approach 1:
The system applies different detection precision requirements to different spatial zones. Within the predetermined range (normal operation zone), the system maintains high measurement precision to accurately detect proper operator state. Outside this range, the system transitions to a different control mode, so extreme precision is less critical. This localized quality approach balances ease of operation with measurement precision.
Data Source
AI summary
Unintended motion of a displayed object is prevented by rapidly detecting a state in which an operator becomes unable to operate an operating unit. Provided is an operation input unit including a display; a head-mounted unit; an operating unit to which an operating signal for a displayed object displayed on the display is input; a relative-position detecting section that detects the relative position between the head-mounted unit and the operating unit; and a control unit that controls the displayed object by switching between a first control mode in which the motion of the displayed object is controlled in accordance with an operating signal input to the operating unit and a second control mode in which the motion of the displayed object is controlled by limiting an operating signal input to the operating unit on the basis of the relative position detected by the relative-position detecting section.