Dynamic List Display Scaling for Mobile Music Players
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Solution Overview
Problem
Small-sized in-vehicle and mobile music player screens require extensive scrolling to find a desired song, making it difficult to locate the target quickly due to limited display capacity and slow scrolling speeds.
Innovation Solution
An information display device with a touch panel that adjusts display modes based on scrolling speed, displaying identical item sizes at low speeds and increasing middle item sizes while reducing end item sizes at higher speeds to enhance visibility and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the screen size is increased to display more songs simultaneously, then the number of visible items increases, but the device becomes larger and less suitable for in-vehicle or mobile use
Solution Approach 1:
The patent applies dynamics by making the display mode changeable based on scrolling speed. The system dynamically adjusts between first display mode (all items same size) and second display mode (middle items larger, end items smaller) according to the detected scrolling speed, allowing the effective display capacity to adapt to user interaction patterns without physically changing screen size
Solution Approach 2:
The patent changes the display parameter (item size distribution) based on scrolling speed threshold. When scrolling speed exceeds the threshold, the system transitions to a display mode where middle items are enlarged and end items are reduced, effectively increasing the number of visible items by optimizing their size distribution rather than increasing physical screen area
2Loss of time
If the scrolling speed is increased to reduce retrieval time, then the time to reach desired target decreases, but it becomes difficult to find and identify the desired target in the scrolled list
Solution Approach 1:
The patent changes the display parameter (item size) based on scrolling speed. When scrolling speed exceeds the threshold, the system switches to second display mode where middle items are displayed larger and end items smaller, making it easier to identify targets during fast scrolling while still allowing quick navigation
Solution Approach 2:
The patent applies local quality by differentiating the display size of items based on their position in the list during fast scrolling. Middle items are enlarged to facilitate easier identification and selection, while end items are reduced in size, creating a non-uniform display that optimizes for the user's likely interaction patterns during rapid scrolling
3Ease of operation
If the scrolling speed is decreased to improve target identification, then the ease of finding desired target increases, but the time required to scroll through the list increases
Solution Approach 1:
The system dynamically adjusts display mode based on actual scrolling speed, allowing users to scroll quickly when needed while maintaining good target identification through the second display mode's enlarged middle items, thus resolving the trade-off between speed and identification ease
Data Source
AI summary
A content playback device 1 displays a content list displayed on a display unit 2 in a first display mode in which list words are identical in size to each other and list buttons are identical in size to each other if a speed of scrolling for the content list is lower than a threshold. If the speed of the scrolling for the content list is equal to or higher than the threshold, the content playback device 1 displays the content list in a second display mode in which list words and list buttons arranged at the middle of the content list are displayed to be larger in size than those displayed in the first display mode with list words and list buttons being gradually reduced in size from the middle to each of the upward and downward directions.