Compact infrared touch screen apparatus
First Claim
1. An infrared touch screen apparatus, comprising:
- a display screen mounted within a frame;
a circuit board disposed behind a back side of said display screen;
an infrared transmitting device mounted on said circuit board and an infrared receiving device mounted on said circuit board;
a first reflective device in optical communication with said infrared transmitting device, said first reflective device configured to redirect an infrared beam originating from said infrared transmitting device behind said display screen, over a front side of said display screen; and
a second reflective device in optical communication with said first reflective device, said second reflective device configured to redirect said infrared beam from said front side of said display screen to said infrared detecting device behind said display screen.
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Accused Products
Abstract
An infrared touch screen apparatus includes a display screen mounted within a frame, a circuit board disposed behind a back side of the display screen, an infrared transmitting device mounted on the circuit board and an infrared receiving device mounted on the circuit board. A first reflective device is in optical communication with the infrared transmitting device, said first reflective device configured to redirect an infrared beam originating from the infrared transmitting device behind the display screen, over a front side of said display screen. A second reflective device is in optical communication with the first reflective device, the second reflective device configured to redirect the infrared beam from the front side of said display screen to the infrared detecting device behind the display screen.
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Citations
11 Claims
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1. An infrared touch screen apparatus, comprising:
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a display screen mounted within a frame;
a circuit board disposed behind a back side of said display screen;
an infrared transmitting device mounted on said circuit board and an infrared receiving device mounted on said circuit board;
a first reflective device in optical communication with said infrared transmitting device, said first reflective device configured to redirect an infrared beam originating from said infrared transmitting device behind said display screen, over a front side of said display screen; and
a second reflective device in optical communication with said first reflective device, said second reflective device configured to redirect said infrared beam from said front side of said display screen to said infrared detecting device behind said display screen. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An infrared touch screen apparatus, comprising:
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a display screen mounted within a frame;
a circuit board disposed behind a back side of said display screen;
an array of infrared transmitting devices mounted on said circuit board and a corresponding array of infrared receiving devices mounted on said circuit board;
an array of first periscope devices in optical communication with said infrared transmitting devices, said first periscope devices each configured to redirect an infrared beam originating from one of said infrared transmitting devices behind said display screen, over a front side of said display screen; and
an array of second periscope devices in optical communication with said first periscope devices, said second periscope devices each configured to redirect said infrared beam from said front side of said display screen to said infrared detecting devices behind said display screen, thereby resulting in a grid of infrared light projected over said front side of said display screen. - View Dependent Claims (8, 9, 10, 11)
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Specification