Load-Threshold Vibration Control for Accurate Tactile Feedback
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Solution Overview
Problem
Conventional vibration application mechanisms often result in erroneous actuation of the vibration generator due to changes in load caused by the vibration of the vibratable part, leading to inappropriate tactile feedback.
Innovation Solution
A vibration application mechanism with a controller that determines whether the sensed load exceeds specific threshold values and only drives the vibration generator during predetermined periods, preventing erroneous actuation by ensuring the load remains within specified ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the controller continuously monitors load to detect pressing operations, then the detection responsiveness is improved, but the system complexity increases
Solution Approach 1:
The controller uses a predetermined period mechanism that is set in advance when a pressing operation is detected. This preliminary setup simplifies the control logic by providing a clear time-based framework for subsequent vibration determination, avoiding the need for complex continuous analysis
Solution Approach 2:
The control system operates in periodic cycles: detect pressing operation → set predetermined period → determine vibration generation → repeat. This structured periodic approach maintains high detection responsiveness while keeping the control logic manageable through clear阶段性 (staged) decision points
Data Source
AI summary
A vibration application mechanism including a vibratable part, a load sensor to sense a load applied to the vibratable part, a vibration generator to vibrate the vibratable part, and a controller. The controller makes a first determination as to whether a load sensed by the load sensor has equaled or exceeded a first threshold value; if the first determination is such that the sensed load has equaled or exceeded the first threshold value, the controller drives the vibration generator and makes a second determination, during a predetermined period, as to whether a load sensed by the load sensor has fallen below a second threshold value, wherein the period starts when the sensed load has equaled or exceeded the first threshold value; and if the second determination is such that the sensed load has fallen below the second threshold value during the period, the controller does not drive the vibration generator.