Electronic pen input device and coordinate detecting method therefor
First Claim
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1. An electronic pen input comprising:
- an optical 3-dimensional detecting device that radiates light and detects reflections of the radiated light for detecting orientation angles of a centerline of the pen relative to a ground and a height of the pen over a writing surface;
a 3-axis accelerometer for detecting a movement of the pen; and
a communication means for sending the detected information to a post processing device.
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Abstract
A electronic pen input device and a coordinate determining method are provided. The electronic pen input device includes an optical 3-dimensional detecting device for detecting orientation angles of a centerline of the pen relative to a ground and a height of the pen over a writing surface, a 3-axis accelerometer for detecting a movement of the pen, and a communication means for sending the detected information to a post processing device.
189 Citations
24 Claims
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1. An electronic pen input comprising:
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an optical 3-dimensional detecting device that radiates light and detects reflections of the radiated light for detecting orientation angles of a centerline of the pen relative to a ground and a height of the pen over a writing surface;
a 3-axis accelerometer for detecting a movement of the pen; and
a communication means for sending the detected information to a post processing device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A coordinate detecting method comprising:
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(a) detecting three-directional orientation angles of a pen with respect to a writing surface and a height therebetween and detecting a movement of the pen, based on light reflected off the writing surface;
(b) transmitting the orientation angles, the height and the movement information to a signal processor so as to determining a position of a tip portion of the pen; and
(c) sending the position information to a terminal device by using a communication means. - View Dependent Claims (15, 16, 17, 18, 19)
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20. A coordinate determining method comprising:
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(a) measuring orientation angles of a pen relative to a writing surface and a height thereof over the writing surface and measuring acceleration signals of the pen, based on light reflected off the writing surface;
(b) sending the measured signals to a terminal through a communication means; and
(c) transforming the orientation angle, the height and the acceleration signals by a processor in the terminal so as to determine a position of the pen. - View Dependent Claims (21, 22, 23, 24)
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Specification