Display Device Thumbnail Storage for Memory-Constrained Document Viewing
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Solution Overview
Problem
Existing display technologies face challenges in managing large amounts of image data efficiently, particularly when multiple documents are stored, leading to insufficient memory capacity.
Innovation Solution
A display device and method that switches between displaying documents using original image data and reduced thumbnail data, deleting original data for less frequently accessed documents while retaining thumbnail data, and acquiring original data from an external source as needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If original image data of multiple documents is stored in the device, then display quality is maintained, but memory capacity becomes insufficient
Solution Approach 1:
The patent segments image data into two distinct types: original high-resolution image data and reduced-resolution thumbnail data. This segmentation allows the system to store both types selectively, using original data for documents requiring high display quality and reduced data for others, thereby optimizing memory utilization while maintaining display reliability where needed.
Solution Approach 2:
The patent changes the resolution parameter of image data by creating reduced-resolution versions (thumbnails) from original high-resolution images. This parameter transformation enables the system to store multiple versions of the same document with different quality levels, allowing memory-constrained devices to accommodate more documents while preserving the option to display high-quality images when necessary.
2Quantity of substance
If reduced thumbnail data is used for all documents, then memory capacity is sufficient, but display quality deteriorates
Solution Approach 1:
The patent implements a dynamic data management system that automatically transitions documents between two storage states based on usage patterns. Frequently accessed or currently viewed documents are maintained in the first state (original data stored) while less accessed documents transition to the second state (only thumbnail data stored). This dynamic adaptation allows the system to optimize memory usage while ensuring display quality is preserved for documents that require it.
Solution Approach 2:
The system performs self-service by automatically managing the conversion between data states without requiring manual user intervention. The data management unit autonomously monitors document access patterns, identifies candidates for state transition, and executes the conversion process, thereby reducing memory requirements while maintaining display quality for relevant documents.
3Quantity of substance
If original image data is deleted to reduce memory usage, then storage efficiency improves, but data loss occurs when high-resolution display is needed
Solution Approach 1:
The patent creates reduced-resolution copies (thumbnails) of original image data while retaining the option to restore or reacquire the original high-resolution data. These thumbnail copies serve as space-efficient substitutes that preserve the essential visual content, allowing the system to delete or not store original data for less important documents while maintaining adequate display capability through the copied thumbnail versions.
Solution Approach 2:
The patent implements a discarding and recovering mechanism where original image data can be discarded (not stored or deleted) when transitioning to the second state, but can be recovered or reacquired from external sources when needed. The thumbnail data acts as a permanent placeholder that can be replaced by original data if the user requests high-resolution display, thus preventing permanent information loss while improving storage efficiency.
Data Source
AI summary
A non-transitory computer-readable storage medium storing a program is provided, the program causing a computer to function as: a display processing unit that displays a plurality of pages included in a document in a first state on a display unit, based on original image data, and displays a plurality of pages included in a document in a second state on the display unit, based on reduced image data of each page; and a data management unit that, when a document present in a storage unit shifts from the first state to the second state, deletes the original image data of the shifted document from the storage unit while leaving the reduced image data of each page of the shifted document, and when the document present in the storage unit shifts from the second state to the first state, acquires the original image data of the shifted document from an external device.