Remote control system for electric apparatus
AssigneeSony Corporation
InventorsTakao Mogi, Hisao Okada
Life of this patent
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Abstract
A remote control system for selectively controlling plural functions of electric apparatus comprising a combination of an improved transmitter for generating a command signal of a single frequency which is transmitted intermittently for a plurality of intervals of time, the length of each of which is determined in response to selection of one of the plural functions, and a receiver for receiving the command signal and producing a control signal for controlling the selected function in response to the length of each of the intervals and to the number of the intervals of the received command signal.
Claims10
A remote control system wherein plural functions of electric apparatus are selectively controlled in accordance with a received command signal having a single frequency and repetitive transmission periods, the duration of a transmission period being determinative of a particular function, comprising:
- receiving means for receiving said command signal;
- detecting means coupled to said receiving means for producing pulses having durations corresponding to the durations of the received transmission periods of said received command signal;
- measuring means coupled to said detecting means for measuring the duration of each produced pulse and for selectively producing one of a plurality of output pulses in accordance with the measured duration of said produced pulse;
- counter means coupled to said measuring means for counting the consecutive number of each of said output pulses produced by said measuring means to thereby provide a count of the number of consecutive repetitions of transmission periods having the same duration which are received by said receiving means;
- and
- control signal generating means coupled to said counter means for generating one of a plurality of control signals depending upon the output pulses produced by said measuring means and only if said counter means counts at least a predetermined number of said output pulse representing that at least said predetermined number of consecutive repetitions of a command signal having a selected transmission period has been received, said generated control signal being adpated to control a selected function.
Dependencies are inferred from the claim text.