Optics: image projectors – Projected image combined with real object
Patent
1997-02-12
1999-04-06
Dowling, William
Optics: image projectors
Projected image combined with real object
353 30, G03B 2114
Patent
active
058907874
ABSTRACT:
An improved desktop projection display system which effectively utilizes desktop space by producing a large image that appears to be at the rear edge of the desk. The display is compact because it uses a transparent-reflective panel (i.e., beamsplitter) to reflect a screen image through the same space occupied by the projection beam. This is achieved by projecting through a transparent-reflective panel onto a front projection screen located on the desk surface. An image formed on the front projection screen is then reflected by the transparent-reflective panel creating the appearance, to the observer, that the reflected front projection screen is positioned toward the rear of the desk surface. This invention greatly improves desktop display ergonomics for large display viewing by providing a sufficient distance between the observer seated at a desk and the display image. A key embodiment of the invention positions a camera behind the transparent-reflective panel at the apparent position of the reflected screen image thus ensuring teleconferencing eye contact. The invention resolves the presence of visible reflections of the projector lens and related visible artifacts to allow artifact-free image capturing through the transparent-reflective panel. The teleconferencing eye-contact configuration, though ideal for desk top use, may also be incorporated into devices such as laptop computers, configured in kiosks or used in a manner similar to big screen projection televisions.
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patent: 4928301 (1990-05-01), Smoot
patent: 5400069 (1995-03-01), Braun et al.
patent: 5612734 (1997-03-01), Nelson et al.
patent: 5619254 (1997-04-01), McNelley
patent: 5639151 (1997-06-01), McNelley et al.
patent: 5666153 (1997-09-01), Copeland
Machtig Jeffrey S.
McNelley Steve H.
Dowling William
Videotronic Systems
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