International Business Machines Corporation

Istvan Lovas

Russell Alan Budd

Derek Brian Dove

Robert Stephen Olyha, Jr

Carl G Powell

Kevin K Chan

Minhua Lu

Shawn Anthony Hall

Kei-Hsiung Yang

Ronald Wayne Nunes

Ernest Bassous

Joseph M Blum

William Joseph Surovic

Alan D Wilson

Constantino Lapadula

Angela C Lamberti

Robert Scott Emmans

Robert H Fair

Russel A Budd

Robert S Olyha

A head mounted virtual image display unit is provided which is compact in size and weight, and incorporates a high performance optical system offering a clear see-through capability. A sliding light shield may be incorporated for those instances when see-through capability is not desired. A focus adjustment may be incorporated to permit the focusing of the image, for example, at a distance of approximately 18 inches to infinity. An adjustable headband may be incorporated that adapts to fit the users head. A flexible boom structure may be incorporated to facilitate fine positional adjustment of the optical assembly. A slider and ball joint mechanism may also be incorporated to facilitate positional adjustment of the optical assembly. A built-in microphone may be incorporated to enable speech input by the user. The head mounted virtual image display unit may be used comfortably in conjunction with eye or safety glasses, and provides a useful image to the user without blocking his view of the surrounding environment. The unit is designed to have a pleasing appearance so as to greatly enhance user acceptability.

Compact optical system and packaging for head mounted display

Method and apparatus for accurate, micro-contact printing

A method of assembling a liquid crystal display device including a pair of substrates combined together with a sealing member and a liquid crystal interposed between the substrates, includes the steps of disposing a plurality of spacers in the area of the sealing member between the substrates, positioning a frame on an outside surface of each substrate, the frame being aligned with the sealing member, and applying pressure to each frame so that a region corresponding to a display area is substantially pressure-free and a uniform cell gap is obtained.

Stress-free liquid crystal cell assembly

The method of fabrication of a monolithic silicon membrane structure in which the membrane and its supporting framework are constructed from a single ultra thick body of silicon. The fabrication sequence includes the steps of providing a doped membrane layer on the silicon body, forming an apertured mask on the silicon body, and removal of an unwanted silicon region by mechanical grinding and chemical etching to provide a well opening in the silicon body terminating in the doped membrane.

Monolithic silicon membrane device fabrication process

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Mahopac, NY, United States of America

Istvan Lovas