JPS60216693A - Remote control device - Google Patents

Abstract

PURPOSE:To prevent malfunction even if receiving noise by providing a generator for producing signals different in prescribed frequency or code in a receiver to provide a means for inhibiting the reception processing of an operation command signal during the reception of theses signals. CONSTITUTION:A transmitter 1 is provided with a key input part 10, encoder 11, 1st outgoing circuit for outgoing a command signal 30 by the 1st frequency or codes and the 2nd outgoing circuit 13 for outgoing a suppression signal 31 by the 2nd frequency or codes. A receiver 2 is provided with a light-receiving circuit 20, tuning circuit for tuning the 1st frequency, 1st decoder 23, 2nd decoder 24, an AND gate 25 with an inhibition input terminal and a control circuit 26. When the key of the transmitter 1 is not in operation, the AND gate 25 is closed. Even if external noise enter and the 1st decoder 23 generates an erroneous output in this condition, the control circuit 26 does not operate.

Description

[Detailed description of the invention] Technical field> The present invention is used for remotely controlling electrical equipment.
Relating to a remote control device.

Problems to be solved〉 For remote control devices (hereinafter referred to as remote controls) that use infrared rays, etc., it is necessary to
The remote control receiving circuit often detects noise during F, signals from other similar remote controllers, etc., and causes erroneous control. In particular, if you turn off the power to an electrical device using a remote control and then turn it on when you are out, there is a major drawback that it may cause a fire. It is something.

<Objective of the Invention> Therefore, an object of the present invention is to provide a safe and highly reliable remote control device that does not malfunction even when the above-mentioned noise is received.

<Example> FIG. 1 shows an embodiment of the present invention.

The transmitter 1 includes a key power section 10, an encoder 11, a first transmitter circuit 12 that transmits a command signal 30 at a first frequency or code, and a second transmitter circuit that transmits a deterrent signal 31 at a second frequency or code. A circuit 13 is provided. Receiver 2 is
a light receiving circuit 20, a tuning circuit 21 tuned to the first frequency,
It includes a tuning circuit 22 tuned to the second frequency, a first decoder 23, a second decoder 24, an inhibit input terminal material AND gate 25, and a control circuit 26. When the key of the "transmitter" is not operated, a coded signal at the second frequency is transmitted from the second transmitting circuit 13 according to the control signal of the encoder 11, and the receiver 2 that receives this transmits the received signal. is detected by the second tuning circuit 22, an inhibit signal is obtained by the second decoder 24, and the AND gate 25 is closed.

In this state, if external noise enters the first decoder 23
Even if the output is incorrect, the AND gate 25 will not output the output.
The control circuit 26 is never activated. Transmitter 1
When the key is operated, the operation of the second transmitting circuit 13 is stopped, and an operation command signal is transmitted by the first transmitting circuit 12, the light receiver 20, the first open circuit 21, and the first decoder 23. The control circuit 26 is activated via the AND gate 25.

FIG. 2 shows a specific circuit diagram of the transmitter 1. keyboard 1
The key signal No. 4 is input to the microcomputer 15, and the microcomputer 15
The first and second transmitting circuits 12 and 13 are controlled by. 16 is a first frequency oscillation circuit, 17 is a second frequency oscillation circuit, 18 is a first light emitting diode, and 19 is a second light emitting diode.

FIG. 3 shows a specific circuit diagram of the receiver 2. A first transistor 27 for determining a threshold value is provided after the first tuning circuit.
A second transistor 28 for determining the threshold value is also provided at a subsequent stage of the second tuning circuit, and its output signal is input to the microcomputer 29. Microcomputer 29 No. 1. It includes second decoders 23 and 24, an AND gate 25, and a control circuit 26.

<Effects of the Invention> According to the present invention, as explained above, malfunctions due to external noise are prevented, and the reliability and safety of the device are improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the entire embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific example of the transmitter 1 in FIG. 1, and FIG. 3 is a specific example of the receiver 2 in FIG. 1. It is a circuit diagram. 12-First transmitting circuit 13-Second transmitting surface path 2〇-Light receiving circuit 21-・First tuning circuit 22-Second tuning circuit 25-Prohibition terminal material AND gate 26-Control circuit. Patent Applicant Sharp Corporation Agent Patent Attorney Arata Nishida---11---1-1-Ko-Shinmo 1-'J Ai-

Claims (1)

[Claims] A device comprising a transmitter that transmits a command signal at a predetermined frequency or code, and a receiver that is installed at a location away from the transmitter and receives the command signal, wherein the transmitter includes a transmitter that transmits a command signal at a predetermined frequency or code. 1. A remote control device comprising: a device for emitting a signal different from the above, and a prohibiting means for prohibiting reception processing of the operation command signal when the different signal is being received in the receiver.