Dual-Screen Visual Aid With Global Preview And Local Zoom
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Solution Overview
Problem
Existing dual-screen visual aids for people with low vision cannot simultaneously expand the field of view and provide global preview and local zoom, limiting their functionality and user experience.
Innovation Solution
A dual-screen visual aid method and apparatus that determines the position of a microscopic area virtual frame on a main screen, maps it to a highlight frame, scans its movement, and performs reverse mapping to extract and zoom the image content on a secondary screen, allowing for global preview and local zoom, with optional extended display and synchronous replication modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing dual-screen visual aids display different scenes or synchronous replication on two screens, then each screen can show its designated content, but the maximum field of view of each display image is limited to a single display region and cannot expand the field of view or realize global preview and local zoom simultaneously
Solution Approach 1:
The display content is segmented into two functional parts: a main screen displaying the global overview scene and a secondary screen displaying the local zoomed-in area. This segmentation allows each screen to serve a specific purpose while together providing both global preview and local detail view, resolving the limitation of single-screen display.
Solution Approach 2:
The secondary screen's zoomed-in view is nested within the context of the main screen's global view. The system allows users to select a region from the main screen and nest the zoomed view on the secondary screen, creating a hierarchical display structure where the detailed view is contained within the broader context, enabling simultaneous global and local visualization.
2Ease of operation
If existing dual-screen visual aids use synchronous replication display, then both screens show the same content, but this approach is simplex in function and cannot meet user requirements for varied display modes
Solution Approach 1:
The system implements dynamic display modes that can switch between synchronous replication, extended display, and microscopic zoom modes. The display configuration is not fixed but can be dynamically adjusted based on user needs, allowing the system to adapt between simplicity and versatility as required by different usage scenarios.
Solution Approach 2:
The dual-screen visual aid system is designed to perform multiple functions: it can operate in synchronous replication mode for simple use cases, extended display mode for broader field of view, and microscopic zoom mode for detailed inspection. This multi-functionality allows a single device to serve diverse user needs without requiring separate specialized devices.
3Device complexity
If existing visual aids limit each screen to single-screen zoom operations, then the system structure is simple, but the system cannot expand the field of view or provide coordinated global-local zoom functionality
Solution Approach 1:
The system introduces a coordinate mapping mechanism as an intermediary between the main screen and secondary screen. This mediator translates coordinate systems and enables real-time synchronized zoom operations across both screens, allowing the secondary screen to zoom into specific regions while the main screen maintains the global view, effectively expanding the usable display area without excessive complexity.
Data Source
AI summary
The present disclosure provides a dual-screen visual aid display method and apparatus for people with low vision, and a device. The method includes: determining, on a main screen based on a current microscopic control zoom level selected by a user, position information of a microscopic area virtual frame with a display image as a reference; mapping, according to display parameters of the main screen and a resolution of a current display image on the main screen, the position information of the microscopic area virtual frame to position information of a microscopic highlight frame in a main screen coordinate system; scanning a moving state of the microscopic highlight frame under the main screen coordinate system to obtain starting point coordinates of the moved microscopic highlight frame; reversely mapping the starting point coordinates of the moved microscopic highlight frame to obtain starting point coordinates of the moved microscopic area virtual frame; and extracting, based on the width and height of the microscopic area virtual frame and the starting point coordinates of the moved microscopic area virtual frame, image content in the microscopic area virtual frame, and performing microscopic zooming, on a secondary screen, on the image content.