OPTICAL TOUCH SCREEN
First Claim
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1. An optical touch screen comprising:
- a main body configured to enclose edges of a touch area of a screen;
fine coordinate infrared light source generators configured to be arranged on each of two horizontal sides and two longitudinal sides of the main body and facing toward the touch area so as to generate a plurality of infrared light sources forming fine coordinates at a predefined spacing and to provide references for coordinates in a horizontal axis and a vertical axis of the touch area;
two or more infrared cameras configured to be installed in the main body to detect the infrared light sources forming fine coordinates generated by the fine coordinate infrared light source generators; and
a control unit configured to calculate coordinates of an object being touched in the touch area on the basis of detection data obtained by the infrared cameras.
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Abstract
The present invention relates to an optical touch screen which can recognize touch coordinates when the screen is touched by a finger, a touch pen, or the like. The optical touch screen comprises units for generating infrared light sources. A control unit calculates coordinates of an object being touched on the touch screen based on data detected by the infrared cameras.
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Citations
11 Claims
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1. An optical touch screen comprising:
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a main body configured to enclose edges of a touch area of a screen; fine coordinate infrared light source generators configured to be arranged on each of two horizontal sides and two longitudinal sides of the main body and facing toward the touch area so as to generate a plurality of infrared light sources forming fine coordinates at a predefined spacing and to provide references for coordinates in a horizontal axis and a vertical axis of the touch area; two or more infrared cameras configured to be installed in the main body to detect the infrared light sources forming fine coordinates generated by the fine coordinate infrared light source generators; and a control unit configured to calculate coordinates of an object being touched in the touch area on the basis of detection data obtained by the infrared cameras. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification