Optical touch detection
First Claim
Patent Images
1. An interactive display device, comprising:
- an elastomer layer;
a reflector configured to transmit light having a first characteristic and to reflect light having less than a critical angle of incidence on the reflector and having a second characteristic;
a display positioned to output modulated light having the first characteristic through the elastomer layer and the reflector as a display image;
a test light source positioned to output light having the second characteristic through the elastomer layer for reflection off of the reflector;
a sensor configured to receive light having the second characteristic reflected from the reflector;
a logic subsystem configured to execute instructions; and
a data-holding subsystem holding instructions executable by the logic subsystem to interpret a pattern of light having the second characteristic received by the sensor as a touch input deforming the reflector.
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Abstract
Optical touch detection is provided by an interactive display device including an elastomer layer, a reflector configured to transmit light having a first characteristic and to reflect light having a second characteristic, and a display positioned to output modulated light having the first characteristic through the elastomer layer and the reflector as a display image. The interactive display device further comprises a test light source positioned to output light having the second characteristic through the elastomer layer for reflection off of the reflector, and a sensor configured to receive light having the second characteristic reflected from the reflector.
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Citations
20 Claims
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1. An interactive display device, comprising:
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an elastomer layer; a reflector configured to transmit light having a first characteristic and to reflect light having less than a critical angle of incidence on the reflector and having a second characteristic; a display positioned to output modulated light having the first characteristic through the elastomer layer and the reflector as a display image; a test light source positioned to output light having the second characteristic through the elastomer layer for reflection off of the reflector; a sensor configured to receive light having the second characteristic reflected from the reflector; a logic subsystem configured to execute instructions; and a data-holding subsystem holding instructions executable by the logic subsystem to interpret a pattern of light having the second characteristic received by the sensor as a touch input deforming the reflector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An interactive display device, comprising:
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an elastomer layer; a dichroic reflector configured to transmit visible light and to reflect infrared light having less than a critical angle of incidence on the reflector; a display positioned to output modulated visible light through the elastomer layer and the dichroic reflector as a display image; a test light source positioned to output infrared light through the display and the elastomer layer for reflection off of the dichroic reflector; a sensor configured to receive infrared light reflected from the dichroic reflector; and an optic configured to focus, at the sensor, infrared light received from one or more regions of the dichroic reflector deformed by one or more touch inputs, the optic being further configured to focus, at a location proximal to the sensor, infrared light received from one or more regions of the dichroic reflector not deformed by one or more touch inputs. - View Dependent Claims (18, 19)
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20. An imaging system for detecting touch inputs to an interactive display device via surface deformation, comprising:
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an elastomer layer; a dichroic reflector configured to transmit light having a first characteristic and to reflect light having less than a critical angle of incidence on the reflector and having a second characteristic; a display positioned to output modulated light having the first characteristic through the elastomer layer and the dichroic reflector as a display image; a test light source positioned to output light having the second characteristic through the display and the elastomer layer for reflection off of the dichroic reflector; a sensor configured to receive light having the second characteristic reflected from the dichroic reflector; a logic subsystem configured to execute instructions; and a data-holding subsystem holding instructions executable by the logic subsystem to; store a pattern of light having the second characteristic received by the sensor; and map one or more selected portions of the pattern of light to one or more particular regions of the dichroic reflector, the one or more particular regions of the dichroic reflector indicating one or more touch inputs deforming the dichroic reflector.
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Specification