Patent ID: 6130662
Filing Date: 2000-10-10
Classification: G01S,G06F

Abstract:
An optical position detecting device comprising:a controlled type information processing device; andan input device,said controlled type information processing device comprising:a light emitting section;a display section; anda first light receiving section,said input device comprising having a housing:one second light receiving section composed of a plurality of light receiving elements receiving light from said light emitting section;a plurality of current/voltage converters for converting output current of said plurality of light receiving elements in said one second light receiving section into voltage;a changing circuit for selecting output voltages of plural channels obtained in said plurality of current/voltage converters in time division in response to channel changing signals, and for generating time-division output voltages;a signal processing unit for processing the time-division output voltages, and for generating relative angle data;a voltage level detecting section for detecting voltage level of each channel in the time-division output voltages; anda control unit for forming coordinate signals by operating and calculating the relative angle data, and for transmitting the coordinate signals to said first light receiving section,wherein said control unit supplies next channel changing signals to said changing circuit, so that channels are selected in the order of magnitude of voltage level of each channel detected in said voltage level detecting section.