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US 6,279,253 B1Granted
Self-masking transparency viewing apparatus
AssigneeSmartlight Ltd.
InventorsDan Inbar, Giora Teltsch
Life of this patent
Estimating the term…
Abstract
A viewing apparatus (11) for transparencies or the like masks any display areas (20) not covered by transparencies (505-508) by generating masks without moving parts, and adapts the luminance level of the image under study and of other display areas to the optimal viewing conditions required by the observer.
Claims20
A method of facilitating viewing a transparency by an observer comprising:
- mounting a transparency, having a display area, in front of a display surface;
- providing backlighting toward said display surface;
- indicating, by an observer, of a portion of the transparency that is smaller than the area of the transparency;
- selecting a pattern of relative back illumination for the transparency in response to said indication;
- and
- masking the backlighting, prior to its illuminating the transparency, utilizing a plurality of addressable liquid crystal elements, to provide different relative illumination in said portion of the transparency relative to other portions of the display area whereby visual perception of the transparency in said portion of the transparency is improved.
3 more elements
A method of facilitating viewing a transparency mounted on a viewbox, the viewbox including apparatus for determining loci of a transparency mounted on a display area thereof, by an observer comprising:
- mounting a transparency, having an area in front of said display area;
- determining, by the apparatus of at least one loci of a transparency when a transparency is mounted in front of said display area;
- providing backlighting toward said display area;
- indicating, by an observer, of a region of interest of the transparency that is smaller then the area of the transparency;
- selecting a pattern of relative back illumination for the transparency in response to said indication;
- and
- masking the backlighting, prior to its illuminating the transparency utilizing a mask generator having no moving parts, to provide different relative illumination in said region of interest of the transparency relative to other portions of the display area whereby visual perception of the transparency in said portion of the transparency is improved.
4 more elements
Dependencies are inferred from the claim text.