| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an optical coordinate input device improving operability by suppressing a malfunction due to disturbance light. <P>SOLUTION: This device is provided with a filter means which discriminates whether the detected coordinate value is due to the disturbance light to filter it. To use a radio wave instead of infrared light for transmitting a control signal, an indicating device is provided with a radio wave transmitting means and a detector is provided with a radio wave demodulation means. <P>COPYRIGHT: (C)2004,JPO</p> |
