Touch input system
First Claim
Patent Images
1. A touch input system, comprising:
- a frame having a first pair of opposed sides positioned parallel to a first axis and a second pair of opposed sides positioned parallel to a second axis, the second axis being perpendicular to the first axis, each of the second pair of sides connecting the first pair of sides, all four sides defining a generally rectangular touch input area;
a linear array of light emitting devices along each side; and
a light detection device positioned at each corner of the frame.
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Abstract
In one aspect, the present invention provides a touch input system for use with an information display system. The touch input system includes a frame have four sides defining a touch input area. On each side is positioned an array of light emitting devices. In a preferred embodiment, the light emitting devices are organic light emitting diodes. A light transmissive prism is positioned along each array of light emitting devices such that light emitted from the light emitting devices is directed across the touch input area. The system also includes light detection device positioned at each corner of the frame.
86 Citations
12 Claims
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1. A touch input system, comprising:
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a frame having a first pair of opposed sides positioned parallel to a first axis and a second pair of opposed sides positioned parallel to a second axis, the second axis being perpendicular to the first axis, each of the second pair of sides connecting the first pair of sides, all four sides defining a generally rectangular touch input area;
a linear array of light emitting devices along each side; and
a light detection device positioned at each corner of the frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A touch input system, comprising:
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a touch screen comprising a frame having a first pair of opposed sides positioned parallel to a first axis and a second pair of opposed sides positioned parallel to a second axis, the second axis being perpendicular to the first axis, each of the second pair of sides connecting the first pair of sides, all four sides defining a generally rectangular touch input area;
a linear array of light emitting devices along each side; and
a light detection device positioned at each corner of the frame; and
a controller coupled to the light emitting devices and the light detection devices, wherein the controller sequentially activates each linear array and activates the light detection devices positioned at corners of the frame opposed to the activated array of light emitting devices. - View Dependent Claims (10, 11, 12)
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Specification