Rotatable Bezel Input With Elastic Feedback and Magnetic Sensing
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Solution Overview
Problem
Existing haptic technologies in electronic devices, such as touch pads, complicate the structure and degrade sensitivity, and there is a demand for an input device that provides an analog feeling.
Innovation Solution
An electronic device with a rotatable bezel that provides physical tactile sensation through resilient units and a sensor unit to detect rotation, using elastic units and magnets to generate input signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If haptic technology is applied to a touch pad, then physical tactile sensation is provided to the user, but the structure becomes complicated and touch sensitivity degrades
Solution Approach 1:
The patent replaces complex haptic mechanisms with a simple resilient unit (spring) that provides tactile feedback through basic elastic deformation. This mechanical substitution eliminates the need for complex motors, actuators, or vibration mechanisms while still delivering physical sensation to the user through the bezel's natural elasticity.
Solution Approach 2:
The patent extracts the haptic feedback function from the touch pad and relocates it to the bezel. By separating the input function (touch pad) from the feedback function (bezel with resilient unit), the system avoids complicating the touch pad structure while providing tactile sensation through a different component.
2Measurement precision
If a touch pad is used for input, then digital touch detection is achieved, but analog tactile feedback is not provided
Solution Approach 1:
The patent merges the digital input function of the touch pad with the analog feedback function of the resilient bezel into a unified interaction system. The sensor unit detects precise digital input while the resilient unit simultaneously provides analog tactile feedback, combining both measurement precision and physical sensation in a coordinated manner.
Solution Approach 2:
The patent implements a feedback mechanism where the resilient unit provides immediate physical resistance and tactile response to user input. This feedback loop enhances the user's perception of their actions while the sensor unit independently maintains precise digital detection, satisfying both measurement accuracy and analog feedback requirements.
3Ease of operation
If the bezel is made resilient to provide tactile feedback, then physical sensation is enhanced, but the rotation smoothness may be affected
Solution Approach 1:
The patent carefully controls the parameters of the resilient unit, specifically selecting appropriate spring constants and pre-compression forces to provide tactile feedback while maintaining rotation smoothness. By adjusting these parameters, the system achieves optimal balance between providing physical sensation and ensuring the bezel rotates without excessive resistance or roughness.
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
The bezel offers a physical sensation and serves as an input device by providing elastic feedback and sensing rotation, enhancing user interaction.
Implementation Method 1
a plurality of resilient units provided in the housing so as to provide an elastic force to the bezel in a first direction
Implementation Method 2
a sensor unit that senses the degree of rotation of the bezel
Data Source
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AI summary
An electronic device according to various embodiments of the present invention may comprise: a housing; a display device mounted on a surface of the housing; a bezel, which is rotatably coupled to the housing, and which rotates along the circumference of the display device; and elastic portions provided on the housing so as to provide the bezel with an elastic force in a first direction. The above electronic device may be implemented variously according to embodiments.