Koordinaten-Ferneinstelleinrichtung

摘要

A remote coordinate designating device has a remote control 1 with a light (infra-red) emitting device, and a controller 3 for detecting a designated position by receiving light from the remote control. One cycle of the light signal is composed of switch data and a coordinate detection timing header at the head using the normal remote control frequency band, and a coordinate detection carrier at a lower frequency. The switch data contains on-off information about a switch for pointing, and coordinate detection is started when a predetermined time has passed from the rise of a burst portion at the head. The remote control 1 has a number of light emitters energised in various groups in turn, and the controller 3 detects x and y coordinates of the remote control 1 (or corresponding angles) from relative light intensities, to control position of a cursor 5. <IMAGE>