| 摘要 |
<p>A point-type radio controller eliminates a time interval between infrared signals transmitted from a plurality of transmitting diodes, and eliminates influences caused by a noise and an external interference. The point-type radio controller employs a frequency division transmitting method using a different carrier frequency. Otherwise, the present invention attaches horizontal and vertical polarization filters to the transmitting diodes, arranges a pair of polarization filters being the horizontal and vertical polarization filters at a constant distance in the receiving sensor, and transmits the infrared rays wherein horizontal and vertical polarization components are separated while transmitting. Otherwise, the present invention includes the infrared transmitting diodes having a different characteristic wavelength; includes a pair of the receiving sensors capable of receiving the infrared signals transmitted with having a different characteristic wavelength; basically separates the plurality of infrared signals from a plurality of transmitting diodes; and transmits the infrared signals. Accordingly, the infrared signals are simultaneously transmitted to outside without a time interval. As a result, the present invention prevents or minimizes a signal distortion and a mutual interference between the infrared rays in transmitting/receiving the infrared rays, accurately calculates coordinates-position indicated by the user, and thus accurately controls a pointing operation. Furthermore, since there are no influences caused by a noise and an external interference, a transmission error ratio decreases and a transmission ratio enhances. <IMAGE></p> |
