Object detection calibration system of an optical touch screen and method thereof
First Claim
1. An object detection calibration system comprising:
- a touch screen comprising;
a control panel comprising a first side, a second side, a third side, and a fourth side; and
at least one first image sensor positioned at a corner region joining the first side and the second side; and
an auxiliary reference device comprising a plurality of reference marks comprising at least a first set of reference marks, a second set of reference marks, and a first boundary mark, wherein the first set of reference marks is positioned on the third side, the second set of reference marks is positioned on the fourth side, and the first boundary mark is positioned at a corner region joining the third side and the fourth side;
wherein the first image sensor is utilized for capturing a first image of at least a first object and the plurality of reference marks, and the touch screen determines relative position relationships between the first image sensor, the first object, and the plurality of reference marks according to positions of the first object and the plurality of reference marks in the first image.
1 Assignment
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Accused Products
Abstract
A first image sensor captures a first image of a panel of a touch screen. The first image includes a first object, a second object, a first set of reference marks, a second set of reference marks, and a first boundary mark. The touch screen establishes relationships of relative positions among the first image sensor, the first object, the second object, and the reference marks according to positions of the first object, the second object, and the reference marks in the first image. And the touch screen calculates a relative position between the first image sensor and the panel according to the relationships of relative positions among the first image sensor, the first object, the second object, and the reference marks and relative positions among the first object, the second object, and the panel.
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Citations
11 Claims
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1. An object detection calibration system comprising:
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a touch screen comprising; a control panel comprising a first side, a second side, a third side, and a fourth side; and at least one first image sensor positioned at a corner region joining the first side and the second side; and an auxiliary reference device comprising a plurality of reference marks comprising at least a first set of reference marks, a second set of reference marks, and a first boundary mark, wherein the first set of reference marks is positioned on the third side, the second set of reference marks is positioned on the fourth side, and the first boundary mark is positioned at a corner region joining the third side and the fourth side; wherein the first image sensor is utilized for capturing a first image of at least a first object and the plurality of reference marks, and the touch screen determines relative position relationships between the first image sensor, the first object, and the plurality of reference marks according to positions of the first object and the plurality of reference marks in the first image. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of performing object detection calibration for a touch screen, the method comprising:
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a first image sensor capturing a first image of a first object, a second object, and a plurality of reference points comprising a first set of reference marks, a second set of reference marks, and a first boundary mark; the touch screen determining relative position relationships of the first image sensor, the first object, the second object, and the plurality of reference points according to position of the first object and the second object in the first image and position of the plurality of reference marks in the first image; and the touch screen calculating relative position relationship of the first image and the control panel according to the relative position relationships of the first image sensor, the first object, the second object, and the plurality of reference marks, and positions of the first object and the second object relative to the control panel; wherein the positions of the first object and the second object relative to the control panel are known. - View Dependent Claims (8, 9, 10, 11)
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Specification