Touchscreen for detecting multiple touches
First Claim
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1. An infrared optoelectronic device configured to propagate an infrared beam of radiation, and comprising:
- a lens having a front curved surface and a back surface, wherein the back surface is configured to receive the infrared beam of radiation and the front surface is configured to split the infrared beam of radiation into a first sub-beam and a second sub-beam, wherein the lens is positioned such that the infrared beam of radiation propagates from the back surface to the front surface.
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Abstract
A touchscreen system comprises a touch area. At least one transmitter is positioned proximate to outer edges of the touch area for transmitting first beams in a first direction. At least one beam splitter is positioned proximate to the outer edges of the touch area for splitting the first beams into at least second and third beams that travel through the touch area in at least second and third directions, respectively. The at least one beam splitter comprises a plurality of deflecting elements. Receivers are positioned proximate to the outer edges of the touch area for receiving the at least second and third beams.
37 Citations
14 Claims
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1. An infrared optoelectronic device configured to propagate an infrared beam of radiation, and comprising:
a lens having a front curved surface and a back surface, wherein the back surface is configured to receive the infrared beam of radiation and the front surface is configured to split the infrared beam of radiation into a first sub-beam and a second sub-beam, wherein the lens is positioned such that the infrared beam of radiation propagates from the back surface to the front surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification