OPTICAL TOUCH SCREEN SYSTEMS USING WIDE LIGHT BEAMS
First Claim
Patent Images
1. A touch screen system, comprising:
- a display screen for displaying a plurality of buttons at designated horizontal and vertical screen coordinates thereon;
a plurality of photo diodes coupled with said display screen, for detecting received light; and
a plurality of lenses coupled with said display screen,wherein the designated horizontal and vertical screen coordinates span a touch sensitive sub-area of said display screen, wherein said photo diodes and lenses are positioned so as to detect a touch of said display screen at the touch sensitive sub-area, and wherein the remainder of said display screen is non-functional for detecting screen coordinates of a touch thereof.
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Abstract
A touch screen system, including a screen, a plurality of light sources coupled with the screen, for emitting light, a plurality of photo diodes coupled with the screen, for detecting the light emitted by the light sources, and for identifying the location of a touch on the screen when an absence of the emitted light is detected, and a plurality of lenses coupled respectively with the plurality of light sources to generate wide beams of light over a portion of the screen wherein substantially connected areas of the screen are covered by neighboring wide beams.
230 Citations
42 Claims
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1. A touch screen system, comprising:
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a display screen for displaying a plurality of buttons at designated horizontal and vertical screen coordinates thereon; a plurality of photo diodes coupled with said display screen, for detecting received light; and a plurality of lenses coupled with said display screen, wherein the designated horizontal and vertical screen coordinates span a touch sensitive sub-area of said display screen, wherein said photo diodes and lenses are positioned so as to detect a touch of said display screen at the touch sensitive sub-area, and wherein the remainder of said display screen is non-functional for detecting screen coordinates of a touch thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A touch screen system, comprising:
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a display screen comprising a touch sensitive sub-area; a plurality of photo diodes coupled with said display screen, for detecting received light; and a plurality of lenses coupled with said display screen, wherein said photo diodes and said lenses are positioned so as to detect the position of a touch of said display screen within said touch sensitive sub-area, and wherein the remainder of said display screen is non-functional for detecting the location of a touch thereof. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 33, 34)
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24. A touch screen system, comprising:
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a screen; a plurality of light sources coupled with said screen, for emitting light; a plurality of photo diodes coupled with said screen, for detecting the light emitted by said light sources, and for identifying the location of a touch on said screen when an absence of the emitted light is detected; and a plurality of lenses coupled respectively with said plurality of light sources to generate wide beams of light over a portion of said screen wherein substantially connected areas of said screen are covered by neighboring wide beams. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 35, 36, 37, 38, 39, 40, 41, 42)
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Specification