Rotary Touch Input Knob With Timed Touch Suppression
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Solution Overview
Problem
Conventional vehicle input devices suffer from reduced operability due to unintended touch inputs when the operating knob is rotated, leading to incorrect GUI interactions.
Innovation Solution
An input device with a motion detector and a touch sensor that selectively outputs detection results based on predetermined motion and contact position, suppressing unintended touch inputs for a defined time period.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If both motion detector and touch sensor output detection results simultaneously, then the device responds to all user inputs, but unintended touch inputs occur during motion operations reducing operability
Solution Approach 1:
The controller applies preliminary anti-action by suppressing the touch sensor output when motion detection is active. This prevents the harmful effect of unintended touch inputs before they can occur, by proactively disabling the touch sensor during rotation operations. The controller monitors motion detector status and preemptively blocks touch sensor signals that would otherwise cause incorrect GUI interactions.
Solution Approach 2:
The controller implements preliminary action by establishing a suppression period that starts when motion detection begins. This preliminary timing mechanism ensures that touch sensor outputs are blocked during the entire duration of the motion operation, including any touch inputs that might occur accidentally during rotation. The suppression period is predetermined and automatically activated based on motion detector triggers.
2Adaptability or versatility
If the touch sensor is always active, then all touch inputs are detected, but touch inputs during rotation are interpreted as intentional causing incorrect operations
Solution Approach 1:
The touch sensor's operational state is made dynamic rather than static. The controller adjusts the touch sensor's output behavior based on the current operation context - fully active when no motion is detected, and suppressed when motion detection is active. This dynamic control allows the system to adapt its sensitivity and response characteristics to match the current user interaction mode, preventing misinterpretation of touches during rotation while maintaining full touch functionality during static states.
Data Source
AI summary
An input device includes: an operating component that includes an operating surface and is operated by an operating body; a rotation detector that detects rotation of the operating component; a touch sensor that detects a contact position of the operating body on the operating surface; and a controller that outputs a detection result of the rotation detector when the rotation detector detects the rotation of the operating component, and outputs a detection result of the touch sensor when the touch sensor detects the contact position of the operating body. When the rotation detector detects the rotation of the operating component and the touch sensor detects the contact position of the operating body, the controller outputs the detection result of the rotation detector and does not output the detection result of the touch sensor for a first time period starting from the detection by the rotation detector.