Virtual magnifying glass system architecture
US7949955B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 4, 2005 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Feb 19, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04805
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display screen magnifier is controllable by a user to magnify selected portions of a desktop including windows open on the screen. A magnified image is presented within a moveable magnifier frame. The magnified image corresponds to screen content located within a magnification region underlying the magnifier frame, magnified to a set level of magnification. The magnifier is configured to remain on top of the display screen desktop, including open windows, while it is activated. It also passes events of a user input device to windows located beneath the magnifier, and dynamically updates the magnified image to reflect changes in underlying screen content. The display screen magnifier is configured to operate this way through a leveraging of resources made available by application programming interfaces (APIs) of an operating system, namely a windows style, and a second stage screen content compositing engine associated with the windows style.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.