List Display Apparatus Partial Rendering Scroll Speed
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Solution Overview
Problem
Existing list display technologies face increased processing loads during scroll operations, leading to delayed rendering and reduced scroll speed, and users struggle to understand the extent of the displayed range, making it difficult to access desired items.
Innovation Solution
A list display apparatus and method that arranges item images in a scroll direction, moving newly displayed images onto the screen while simultaneously moving a portion of them in a cross direction, reducing rendering load by excluding unseen elements from rendering and controlling scroll speed and timing to minimize rendering during high-speed scrolls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If all items passing through the display range are rendered during scroll operation, then the user can grasp the scroll progress on the screen, but the processing load increases and scroll speed is restricted
Solution Approach 1:
The patent applies partial action by rendering only a portion of items during scroll operation rather than all items. Specifically, it renders items at the head and tail ends of the scroll direction while excluding items in the middle portion, thereby reducing processing load while maintaining sufficient visual feedback for users to grasp scroll progress.
Solution Approach 2:
The patent segments the items in the display range into three portions: head end items, middle items, and tail end items. This segmentation allows differential rendering treatment where head and tail items are rendered for visibility while middle items are excluded, resolving the contradiction between scroll progress visibility and scroll speed.
2Reliability
If rendering of items is performed during scroll operation, then the user can see the displayed range, but the rendering process is delayed due to processing load
Solution Approach 1:
The patent reduces rendering time by performing partial rendering during scroll operation. It selectively renders only head and tail items while excluding middle items, thereby maintaining display accuracy for scroll progress indication while significantly reducing the time required for rendering operations.
3Productivity
If no rendering of items is performed during scroll operation, then the processing load is reduced, but the user cannot grasp what extent the display range is moving
Solution Approach 1:
The patent achieves partial rendering that balances processing efficiency and display visibility. By rendering only head and tail items during scroll, it provides sufficient visual information for users to grasp display range movement while keeping processing load low and maintaining high processing efficiency.
Data Source
AI summary
Provided is a list display apparatus configured to: arrange, from a list including a plurality of item images arranged in order, item images included in a partial range of the list in a predetermined scroll direction, and display the item images in the partial range on a screen; and move the item images in the scroll direction at a speed corresponding to a user's scroll instruction, and move item images that have not been displayed on the screen in the scroll direction from outside of the screen into the screen so as to newly display the item images on the screen. When the item image that is newly displayed is moved in the scroll direction into the screen, at least a part of the item image is moved in a cross direction crossing the scroll direction from the outside of the screen into the screen at a predetermined speed.