Display device
AssigneeSmartlight Ltd.
InventorsDan Inbar, Alex Natanzon, Hanan Wolf, Ben-zion Levi, Eran Shaffir
Life of this patent
Estimating the term…
Abstract
A viewing device for viewing transparencies comprising a display surface; a source of backlighting that backlights the display surface with linearly polarization axis; member for holding a transparency on the display surface;an optical sensor positioned so that it views the display surface; and polarizer, having a polarizer axis, and suituated between the display surface and the optical sensor. The viewing device is configured such that the polarizer axis is functionallu related to the polarization axis of the polarized light; and the polarized is smaller than the display surface.
Claims114
A viewing device for viewing transparencies comprising:
- a display surface;
- a source of backlighting that backlights the display surface with linearly polarized light having a polarization axis;
- means for holding a transparency on the display surface;
- an optical sensor positioned so that it views the display surface;
- and
- a polarizer, having a polarizer axis, and situated between the display surface and the optical sensor, wherein the viewing device is configured such that the polarizer axis is functionally related to the polarization axis of the polarized light;
- wherein said polarizer is smaller than said display surface.
A method of determining edges of a film in viewing film transparencies comprising:
- placing a film transparency having edges on a display surface which is backlit with polarized light having a polarization axis;
- acquiring at least one image of the surface, through a polarizer having a polarizer axis, with a sensor, wherein the sensor is a camera;
- and
- processing the at least one image, with a controller, to locate the edges of the transparency.
A method of determining edges of a film in viewing film transparencies comprising:
- acquiring at least one light measurement of a film transparency having edges backlit by polarized light having a polarization axis;
- and
- acquiring at least a second light measurement of the film transparency through a polarizer having a polarizer axis, wherein the polarizer axis of the polarizer is functionally related to the polarization axis of the polarized light;
- and
- processing the light measurements to determine the position of the edge.
A viewing device comprising:
- (a) a display surface adapted for mounting a film thereon;
- (b) a backlighting source for backlighting said display surface;
- (c) a camera which views said surface;
- and
- (d) a processor which receives image data from said camera and communicates with a second viewing device comprising at least a display surface adapted for mounting a film thereon and a backlighting source for backlighting said display surface.
A viewing device comprising:
- a display surface adapted for mounting a film thereon;
- a border surrounding said display surface;
- an optical trip-wire at at least a portion of said border;
- a backlighting source for backlighting said display surface;
- and
- a camera which views said surface and said border.
A viewing device comprising:
- a display surface;
- means for mounting a film on the display surface;
- a backlighting source for backlighting said display surface to produce a brightened display surface;
- a camera which views said display surface;
- and
- a memory containing a plurality of uniformity correction maps wherein each map corrects for uniformity variations in the brightness of the display surface produced by a different cause.
A method of identifying changes in occlusion of a backlit display surface by an object using a camera which acquires images at a plurality of pixel points, comprising:
- acquiring an image of the display surface with said camera;
- and
- comparing brightness levels of the image associated with a plurality of locations to stored values of brightness levels associated with said locations, wherein the plurality of locations is substantially smaller than the plurality of pixel points.
A viewing device comprising:
- a display surface adapted for mounting a film thereon;
- a backlighting source for backlighting said display surface;
- a camera which views said surface;
- and
- a separate local polarized light source which illustrates said display surface with polarized light.
A method of viewing transparencies, comprising:
- mounting a transparency on a display surface;
- backlighting the display surface with linearly polarized light having a polarization axis;
- viewing the display surface and the transparency by an optical sensor through a polarizer, having a polarizer axis, wherein the polarizer axis is oriented in a direction, functionally related to the polarization axis of the polarized light;
- and
- directly viewing the transparency, not through said polarizer, by an observer.
A viewing device for viewing transparencies comprising:
- a display surface;
- a source of backlighting that backlights the display surface with linearly polarized light having a polarization axis;
- means for holding a transparency on the display surface;
- an optical sensor positioned so that it views the display surface;
- and
- a polarizer, having a polarizer axis, mounted on the optical sensor such that it is situated between the display surface and the optical sensor, wherein the viewing device is configured such that the polarizer axis is functionally related to the polarization axis of the polarized light.
A viewing device for viewing transparencies comprising:
- a display surface;
- a source of backlighting that backlights the display surface with linearly polarized light having a polarization axis;
- means for holding a transparency on the display surface;
- an optical sensor positioned so that it views the display surface;
- a polarizer, having a polarizer axis, and situated between the display surface and the optical sensor, wherein the viewing device is configured such that the polarizer axis is functionally related to the polarization axis of the polarized light;
- and
- a brightness controller which selectively varies the backlighting of portions of the surface in response to brightness signals generated by the sensor.
Dependencies are inferred from the claim text.