Microsoft Technology Licensing, LLC

David V Esposito

Michael Winser

Scott Mail

Kevin John Smith

Jacob Fleisher

Joseph Kagume Ngari

Samuel A Mann

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.

Virtual magnifying glass system architecture

A display screen magnifier is controllable by a user to magnify selected portions of a desktop including windows open on the screen. A moveable magnifier frame is provided, within which a magnified image is presented. The magnified image corresponds to screen content located within a magnification region underlying the magnifier frame, magnified to a set level of magnification. In one embodiment, the magnification region is moveable relative to the magnifier frame, in relation to movement of the magnifier frame on the display screen. Such relative movement can be used to avoid a potentially disorienting edge condition that arises when a magnifier frame reaches an edge of the display screen and stops, while its associated magnification region continues to pan. In another embodiment, the cursor of a user input device is moveable across the screen display into and out of the magnification region. When the position of the cursor falls within the magnification region, the cursor appears within the magnified image presented within the magnifier frame. A related feature avoids the potentially disconcerting effect of cursor disappearance as a pointing device cursor passes into a 'lens shadow' defined between the magnification region and the magnifier frame.

Virtual magnifying glass with intuitive use enhancements

A display screen magnifier is controllable by a user to magnify selected portions of a desktop including windows open on the screen. A moveable magnifier frame is provided, within which a magnified image is presented. 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 controllable through use of a user input device. At least one operational parameter of the magnifier can be adjusted, without interaction with on-screen objects and without taking focus away from the desktop or any windows open on the screen. In a particular embodiment of the invention, on-the-fly controllability of the magnifier includes its activation and deactivation, adjustment of the magnification level, and adjustment of the size of the magnifier frame.

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North Haven, CT, United States of America

David V Esposito