Rotatable Ring Optical Switch for Infotainment Control
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Solution Overview
Problem
Conventional automotive infotainment interfaces are complex and distracting due to numerous pushbuttons and knobs, and developing custom round display screens is expensive.
Innovation Solution
A user interface featuring a rotatable ring knob with a central circular viewing window and an optical switch that detects rotational positions to control a rectangular display screen, reducing the need for pushbuttons and allowing flexible display configurations at lower development costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional pushbuttons and knobs are used for infotainment control, then comprehensive control functionality is achieved, but driver distraction and operational complexity increase
Solution Approach 1:
Multiple control functions (volume, tuning, menu navigation, mode switching) are merged into a single rotary ring interface. The ring integrates rotational movement for parameter selection and pushing action for confirmation, eliminating the need for separate pushbuttons and knobs while maintaining comprehensive control capability.
Solution Approach 2:
The rotary ring serves multiple functions: rotating for selection, pushing for confirmation, and providing tactile feedback. This multi-functional design allows one component to replace numerous dedicated buttons and knobs, reducing overall interface complexity while preserving full control functionality.
2Shape
If custom round display screens are developed, then circular display aesthetic and integration are achieved, but development cost increases significantly
Solution Approach 1:
Instead of manufacturing a custom circular display screen, the patent uses a standard rectangular display screen combined with a circular rotary ring that creates the visual illusion of a circular display. The ring acts as a frame or border that masks the rectangular shape, providing the desired circular aesthetic without the high cost of custom circular screen development.
Solution Approach 2:
The rotary ring serves as an intermediary element between the driver and the rectangular display screen. It creates the perceptual effect of a circular display while the actual screen remains rectangular, allowing the system to achieve the desired aesthetic appearance using off-the-shelf rectangular display components.
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
Simplifies driver operation, enhances safety by reducing button usage, and provides cost-effective flexibility in display configurations while creating the illusion of a round display.
Implementation Method 1
An optical switch is disposed between the rotatable ring and the display screen and detects the rotational position of the rotatable ring
Data Source
AI summary
A user interface for an infotainment system of a motor vehicle includes a rectangular display screen and a rotatable ring having a central circular viewing window through which the display screen is visible. The rotatable ring includes a plurality of rotational positions relative to the display screen. An optical switch is disposed between the rotatable ring and the display screen and detects the rotational position of the rotatable ring. An electronic processor is communicatively coupled to the display screen and to the optical switch. The electronic processor controls an image presented on the display screen dependent upon the rotatable position of the rotatable ring as detected by the optical switch.