Adaptive Affordance Visibility on Touch Displays
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Solution Overview
Problem
Existing methods for displaying virtual controls, indicators, and visual guides on touch-sensitive devices are often cumbersome, distracting, and can cause user confusion, leading to increased energy consumption and screen burn-in issues, particularly in battery-operated devices.
Innovation Solution
The method involves dynamically adapting the appearance of affordances based on changes in the underlying content and operating mode, constraining the display properties within specific ranges to maintain visibility while reducing distraction and preventing screen burn-in.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If affordances are displayed with high visibility and contrast to guide users, then user guidance effectiveness is improved, but user distraction and cognitive burden increase
Solution Approach 1:
The affordance dynamically changes its display properties (such as brightness, contrast, or visibility) based on the state of the underlying content. When content is static, the affordance maintains higher visibility to provide guidance. When content changes or the device is in idle mode, the affordance reduces its visibility to minimize distraction and prevent burn-in.
Solution Approach 2:
The system adjusts specific display parameters of the affordance (such as luminance, contrast ratio, or transparency) according to the characteristics of the background content and operational context. This allows the affordance to maintain sufficient visibility for user guidance while adapting to different scenarios to reduce overall visual distraction.
2Stability of the object's composition
If affordances are displayed statically over extended periods, then user guidance consistency is improved, but screen burn-in occurs
Solution Approach 1:
The affordance implements periodic changes in its display state, such as subtle animations, brightness variations, or position adjustments, even when providing continuous guidance. This periodic action maintains visual consistency for user guidance while preventing the permanent image retention known as burn-in that occurs with completely static displays.
Solution Approach 2:
Rather than maintaining a completely static display, the affordance introduces controlled dynamic elements that keep the display content changing at a subtle level. This ensures the affordance remains recognizable and guidance-consistent while avoiding the conditions that lead to burn-in.
3Loss of information
If affordances adapt dynamically to background changes, then visual distinctness is maintained, but energy consumption increases
Solution Approach 1:
The system implements partial adaptation by adjusting only the necessary display parameters of the affordance to maintain sufficient visual distinctness, rather than fully adapting all properties. This partial action maintains the affordance's visibility and distinctness while minimizing the energy expenditure required for continuous dynamic adjustment.
Solution Approach 2:
The affordance uses a unified adaptation mechanism that serves multiple functions: maintaining visual distinctness against varying backgrounds, reducing distraction in certain contexts, and minimizing energy consumption. By consolidating these goals into a single adaptive system, the energy cost is optimized while achieving all three objectives.
4Reliability
If affordances are made more salient to prevent user mistakes, then user interaction accuracy is improved, but distraction and energy consumption increase
Solution Approach 1:
The affordance applies enhanced visual properties (such as increased contrast or brightness) only in specific local contexts where user guidance is most critical, rather than uniformly across all states. This localized enhancement maintains interaction accuracy where needed while reducing overall distraction and energy consumption in less critical areas.
Data Source
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AI summary
An electronic device with a display and a touch-sensitive surface displays, on the display, content and an affordance, wherein: the affordance is displayed over a portion of the content; a value of a display property of the affordance is determined based a value of the same display property of the portion of the content over which the affordance is displayed; and the value of the display property of the content is permitted to vary within a first range of values, and the value of the display property of the affordance is constrained to vary within a second range of values that is smaller than the first range of values; while displaying the content and the affordance, the device detects a change in appearance of the content over which the affordance is displayed; and in response to detecting the change in appearance of the content over which the affordance is displayed, the device changes the appearance of the affordance, including: in accordance with a determination that the value of the display property of the content has decreased, increasing the value of the display property of the affordance in accordance with a magnitude of a change in the value of the display property of the content and the second range of values; and in accordance with a determination that the value of the display property of the content has increased, decreasing the value of the display property of the affordance in accordance with a magnitude of the change in the value of the display property of the content and the second range of values.