Force-Scalable Knob Interface for Non-Visual Radio Control
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Solution Overview
Problem
Physical knobs on portable and mobile radios are limited in modes of operation and difficult to use for selecting values from large lists without visual reference, especially in situations where visual access is restricted, such as in emergency responders wearing protective gear or in smoke-filled rooms.
Innovation Solution
A force-scalable stationary interface control featuring a knob-like structure with a touch sensor that senses different levels of applied pressure and touch input locations, allowing for scalable scrolling actions through channels or lists, and output devices like displays and haptic feedback to provide visual and tactile feedback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a physical knob is used to scroll through a large number of values or a long list of items, then the device can be operated without visual reference, but the time required to select a single value becomes excessively long
Solution Approach 1:
The patent applies dynamics by making the scrolling speed variable rather than fixed. The system dynamically adjusts the scrolling scale based on the detected applied pressure level - light pressure produces slow scrolling while heavy pressure produces fast scrolling. This dynamic adjustment allows the user to quickly traverse large lists when needed while maintaining precision when selecting specific items, resolving the contradiction between ease of operation and time loss.
Solution Approach 2:
The patent changes the parameter of scrolling speed by detecting different levels of applied pressure on the knob. The controller identifies multiple pressure levels (light, medium, heavy) and corresponds each level to a different scrolling scale factor. This parameter change enables the same physical knob to produce variable scrolling effects, allowing rapid navigation through large lists while maintaining operational simplicity.
2Device complexity
If a physical knob provides limited modes of operation, then the device structure remains simple, but the versatility of the interface is restricted
Solution Approach 1:
The patent implements multi-functionality by enabling a single physical knob to perform multiple operations through force-scalable scrolling. The same knob structure provides both fine-grained scrolling (for precise selection) and coarse-grained scrolling (for rapid navigation), effectively making one component serve multiple functional modes. This increases versatility without adding complex additional hardware.
Solution Approach 2:
The patent changes the operational parameter of the knob from fixed scrolling speed to variable scrolling speed based on applied pressure. This parameter transformation allows the single knob to adapt to different operational needs - whether the user needs to quickly scan through many channels or carefully select a specific one - thereby increasing the adaptability and versatility of the interface without increasing device complexity.
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
Enables efficient and intuitive selection of radio channels or list items even without visual reference, improving usability in challenging environments by scaling scrolling actions based on applied pressure, thus enhancing operational efficiency for emergency responders.
Implementation Method 1
a touch sensor located at least partially around the fixed surface, the touch sensor configured to sense a plurality of different levels of applied pressure and locations of touch input
Data Source
AI summary
A force-scalable stationary interface control is provided. The control includes a knob-like structure including an axis and a fixed surface located at least partially around the axis, and a touch sensor located at least partially around the fixed surface, the touch sensor configured to sense a plurality of different levels of applied pressure and locations of touch input. The control further includes at least one output device. The control further includes a controller configured to: identify a first level of applied pressure sensed at the touch sensor, identify a scrolling action based on a detected change in locations of the touch input sensed at the touch sensor, identify a current scale of the scrolling action based on an identified first level of applied pressure, and control the at least one output device to provide an identified current scale and an identified scrolling action.