Patent ID: 6509991
Filing Date: 2003-01-21
Classification: H04B

Abstract:
A two-way communication device comprising:an infrared transmitting element; a plurality of infrared receiving elements; a first processing circuit responsive to data to be transmitted by the communication device to provide an outgoing data signal to said infrared transmitting element; a second processing circuit responsive to data received from a remote data source; a first control circuit operative to generate a control signal at a predetermined time relative to transmission of an outgoing signal by the infrared transmitting element; a comparison circuit, the comparison circuit being comprised of: a plurality of third processing circuits respectively connected to the infrared receiving elements, each of the third processing circuits being operative simultaneously in response to the control signal to generate outputs representative of the intensity of signal received by one of the receiving elements at the predetermined time; a fourth processing circuit operative to identify from the outputs of the third processing circuits, the receiving element having the lowest received IR intensity at the predetermined time relative to transmission of the signal by the infrared transmitting element; and a selection device responsive to an output of the third processing circuit to connect the identified receiving element to the second processing circuit for reception of data transmitted by the remote data source.