PRISM ILLUMINATION-OPTIC
First Claim
Patent Images
1. A vision-based interactive-display device comprising:
- a display configured to form images for viewing on a display surface of the vision-based interactive-display device;
an illumination-optic having an upper face positioned towards the display surface and a lower face positioned towards the display, the illumination-optic configured with prisms on the lower face that reflect light out of the upper face of the illumination optic to illuminate the display surface; and
an image detector configured to capture reflections of light from an object on or near the display surface when the display surface is illuminated.
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Abstract
This document describes techniques and apparatuses for implementing a prism illumination-optic for a vision-based interactive-display device. A vision-based interactive-display device includes a display to form images for viewing on a display surface of the device. The device further includes an illumination-optic having an upper face positioned towards the display surface and a lower face positioned towards the display. In accordance with various embodiments, the illumination-optic is configured with prisms on the lower face that reflect light out of the upper face of the illumination-optic to illuminate the display surface.
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Citations
20 Claims
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1. A vision-based interactive-display device comprising:
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a display configured to form images for viewing on a display surface of the vision-based interactive-display device; an illumination-optic having an upper face positioned towards the display surface and a lower face positioned towards the display, the illumination-optic configured with prisms on the lower face that reflect light out of the upper face of the illumination optic to illuminate the display surface; and an image detector configured to capture reflections of light from an object on or near the display surface when the display surface is illuminated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method comprising:
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controlling a light emitter to emit light into an illumination-optic so that the light reflects off of prisms on a lower face of the illumination-optic out of an upper face of the illumination-optic to illuminate a display surface of a vision-based interactive-display device; capturing reflections of light from an object on or near the display surface when the display surface is illuminated; processing the captured reflections of light to recognize the object on or near the display surface; and controlling a display to form one or more images for viewing on the display surface that correspond to the recognized object. - View Dependent Claims (18, 19)
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20. A vision-based interactive-display device comprising:
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a liquid crystal display configured to form images for viewing on a display surface of the vision-based interactive-display device; a lightguide comprising a lower face and an upper face, the lower face having small prisms that are sparsely populated across the lower face of the lightguide, each of the prisms having an included angle of approximately 120 degrees, and the lightguide configured to receive infrared light from one or more light-emitting diodes (LEDs) and to reflect the infrared light off of the prisms and out of the upper face of the lightguide at a wide range of angles to uniformly illuminate the display surface; a digital camera configured to capture reflections of light from an object on or near the display surface when the display surface is illuminated; and a computing device comprising at least a memory and a processor to implement a controller, the controller configured to receive the captured reflections of light, process the captured reflections of light to recognize the object, and control the liquid crystal display to form one or more images for viewing on the display surface that corresponds to the recognized object.
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Specification