Rotary Knob Position Detection Using Touch-Sensor Capacitance
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Solution Overview
Problem
Existing input devices require manual updating of installation coordinates for knobs on touch panels, which is labor-intensive and impairs customizability.
Innovation Solution
An input device that includes a capacitance-type touch sensor and a rotatable operating element with conductive members, capable of detecting the position and installation position of the element based on changes in capacitance, automatically determining the installation position without manual coordinate input.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual coordinate input is used to update installation position, then installation position can be updated, but labor is increased and customizability is impaired
Solution Approach 1:
The system performs automatic position detection and coordinate updating without requiring manual user input. The control circuit automatically detects the operating element's position through capacitance changes and updates the installation coordinates, making the system self-sufficient and eliminating the need for manual coordinate entry.
Solution Approach 2:
The patent replaces the manual mechanical process of coordinate input with an automatic electrical detection system. Instead of manually entering coordinates, the system uses capacitance-type touch sensors to automatically detect and determine the installation position, substituting mechanical user interaction with electrical field-based automatic detection.
2Adaptability or versatility
If manual coordinate input is required, then installation position can be determined, but device complexity is increased due to manual intervention requirements
Solution Approach 1:
The control circuit automatically performs position detection and coordinate storage without requiring manual intervention. The system self-updates the installation position information based on automatic detection results, simplifying the overall process while maintaining full adaptability for different installation locations and operating element 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
Reduces the labor involved in updating the installation position of knobs, enhancing customizability by automating the detection and determination of the knob's position, thus simplifying the replacement process.
Implementation Method 1
a capacitance-type touch sensor... capable of detecting the position and installation position of the element based on changes in capacitance
Data Source
AI summary
An input device capable of determining an installation position of an operating element is provided. A knob includes a fixed part attached to a touch sensor/a cover glass via an adhesive, a rotating part rotatably attached to the fixed part via a rotation shaft, and a conductor provided inside the rotating part. The conductor includes a pair of columnar parts that can be detected by the touch sensor. The columnar parts are positioned diagonally to each other. The input device detects the positions of the columnar parts based on change in capacitance when the knob is operated, and determines the installation position of the knob based on the detected positions.