Dynamic Touchscreen Panel Sizing for Vehicle Control Interfaces
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Solution Overview
Problem
The limited size of touchscreen interfaces in vehicles makes it difficult for users to accurately hit operator control panels, leading to frequent 'mishits' and increased driver distraction, which can compromise driving safety.
Innovation Solution
The operator control system detects touch coordinates and presents operator control panels in enlarged form if missed, with the degree of enlargement based on the distance from the touch point, and learns to prioritize frequently used panels for enhanced hit probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the touchscreen size is kept limited, then the device complexity is reduced, but the ease of operation deteriorates due to small operator control panels being difficult to hit
Solution Approach 1:
The operator control panels dynamically change size based on interaction history. Panels that have been mishit or frequently used are automatically enlarged in subsequent displays, while panels that are rarely interacted with maintain their original size. This dynamic adaptation resolves the contradiction by making frequently used panels easier to hit without increasing the overall touchscreen size or complexity.
Solution Approach 2:
Different regions of the touchscreen display different sized operator control panels based on their specific interaction needs. Instead of uniformly enlarging all panels, the system applies local quality enhancement only to specific panels that require it, maintaining overall device compactness while improving ease of operation for critical controls.
2Ease of operation
If the operator control panels are enlarged from the outset, then the ease of operation is improved, but the area of the touchscreen is exceeded
Solution Approach 1:
The system employs dynamic sizing where operator control panels are enlarged only when and where needed based on real-time interaction data. This resolves the area constraint by avoiding permanent enlargement of all panels, instead applying selective enlargement only to panels that require improved hit accuracy, thus maintaining overall touchscreen area efficiency.
Solution Approach 2:
The size parameter of operator control panels is changed dynamically based on interaction history rather than being fixed. Panels transition between different size states (normal, enlarged, maximally enlarged) depending on their interaction needs, allowing the system to improve ease of operation without permanently consuming excessive touchscreen area.
3Reliability
If multiple operator control attempts are allowed, then the reliability of control function activation is improved, but the loss of time increases due to driver distraction
Solution Approach 1:
The system performs preliminary actions by pre-enlarging operator control panels that are likely to be mishit or frequently used, based on historical interaction data. This preliminary preparation reduces the need for multiple control attempts by making the correct panel more visible and easier to hit from the outset, thus improving reliability while minimizing time loss.
Solution Approach 2:
The system implements feedback loops that monitor interaction outcomes and automatically adjust panel sizes based on mishit patterns. This continuous feedback mechanism learns from previous attempts and proactively prevents future mishits by enlarging problematic panels, reducing both the number of attempts needed and the overall time drivers are distracted.
Data Source
AI summary
A method for operating an operator control system having a graphical display unit and a touch-sensitive interface, wherein coordinates from information presented on the display unit are associated with coordinates of the touch-sensitive interface. Also disclosed is an operator control system for a vehicle having a graphical display unit that presents a piece of information for a user; a touch-sensitive interface that detects a touch by the user; and a control unit coupled to the display unit and the touch-sensitive interface, the control unit controlling presentation of at least one operator control panel on the display unit.