A remote control system for use in remote controlling a television receiver is provided in which a light signal is used as the remote control signal.
An electroluminescent diode is used to emit the remote control light signal which is amplitude-modulated by a modulating frequency in the ultrasonic frequency range and has a very narrow band of wave lengths. The remote control system is relatively big in compact in size and completely free from the erratic operations caused by the noise.
In the wireless remote control systems for television receivers, it is very important to prevent erratic remote control operations due to noise. In conventional remote control systems for television receivers, the remote control signals of a frequency in the ultrasonic frequency range have been generally used so that erratic operations tend to occur very often due to the ambient noise in the ultrasonic frequency range produced for example when coins, keys or the like strike against each other. Therefore the conventional remote control systems using the ultrasonic frequency signals were not reliable in operation.
The primary object of the present invention is therefore to provide a novel remote control system best suited for use with a television receiver which is highly reliable in operation and is free from any erratic operation due to the noise. A transmitter which is very compact in size and light in weight transmits the light signal which is emitted from an electroluminescent diode and is amplitude-modulated by a modulating frequency in the ultrasonic frequency range. The resulting encoded pulses are converted into a form suitable for modulating a high-frequency chain of pulses from the same oscillator so that the infra-red transmitter emits intelligence in extremely short-duration bursts of energy.
The set has a HOUSE for the remote control TELE- PILOT 160 E which is designed to put the remote to avoid floor dropping after use of it.
Thus the present invention may provide a remote control system which is compact in size, very reliable in operation and free from the erratic operations caused by noise signals.
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