JPH01106694A - Remote control device - Google Patents

Abstract

PURPOSE:To save a wasteful power in the sound signal transmission of a main body by providing a second power switch to control the supply of a power source to a sound signal transmitting part, simultaneously, transmitting and receiving the signal of a first power switch through a remote control signal transmitting and receiving part, and controlling the second power switch. CONSTITUTION:When an earphone 3 is connected to a remote control receiver 2 and a voice switch 205 is turned on, a current flows to a voice receiving circuit 20, an one signal is converted to a remote control signal by a remote control signal transmitting part 21, and the signal is transmitted. The on signal demodulated by a receiving part 11 of a main boyd 1 turns on a power switch 104, and supplies the power source to a sound signal transmitting part 10. Consequently, the voice can be listened to by the earphone 3. On the other hand, when a voice switch 205 is turned off by a remote control transmitter 2 at the time of not listening to the voice, an off signal turns off the power switch 104 in the same way, the transmitting part 10 is made into a non-operation, and a wasteful energy consumption is not executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial use The present invention is a remote control device for TV receivers, VTRs, etc., especially for remote control equipment that allows you to listen to audio on the remote control transmitter side! J
1g.

(b) Conventional technology In a remote control device that controls the main body of an electronic device such as a TV receiver or VTR using a remote control signal from a remote control (hereinafter referred to as a remote control) transmitter, the audio signal from the device itself is transmitted by infrared rays. Transmitted by hunting, remote control transmission (e
[A method of receiving audio and listening to it using earphones connected to a remote control transmitter is disclosed in Japanese Patent Application Laid-Open No. 60-19252.
There is a method described in Publication No. H04B9100. An example of this method will be explained with reference to FIG.

In the same figure, 2 and 11) are the main body of the 1a device such as a VTR, the audio signal transmitter 11111 and the remote controller 1d capital CI.
+). The audio signal transmitter (in the l), the H stereo sound signal is large, the carrier is 300KHz,
and FMf adjuster (101) set to 700KHz (
After being FM modulated by a mixer (102), the signals are mixed by a mixer (103) and applied to a driving transistor (Ql).

This drive transistor drives an infrared light emitting diode (D I ) (1) I ) connected to its emitter. A plurality of these external light emitting diodes are connected in series in consideration of directivity and reach. In addition, the remote control signal Chibabeto (111 is the photodiode (D2) for the writer of the remote control number 1d, which will be described later, @Kouki (111)
and a decoder (112).

On the other hand, (2) is a remote control transmitter, which includes an audio signal transmitter and a remote control signal transmitter CI! Provide υ. Audio signal reception fls If1 the infrared light emitting diode (1)+
) (DI)... A photodiode (DS) that receives infrared rays from..., this photodiode output mustard and R
Extract the FMf voice signal of the channel and set it to 0OKH, respectively.
Band pulse filters (201) (202) with cutoff frequencies of z and 700 KHz, their outputs are respectively
An FM demodulator C205) (204) that demodulates M to obtain L'& R channel audio signals, and a power supply e? to these circuits. ! It has an audio switch (205)'' for IJ control, and the earphones (0) are activated by external earphones (3) only when the audio switch (205) is on.

In addition, the remote control number 1d sends icon 12D is a key matrix (211) that is operated by an operation key (not shown).
, an encoder (212) that reads the key matrix and generates a code signal according to the operation of the operation key;
What do you do with the modulator (213) that modulates this encode output to the sumo control number 1-, the drive transistor (Q2) that is controlled by this remote control signal, and the infrared green light emitting diode (D4) that is driven by this drive transistor? ing.

In the above-mentioned remote control device, *g is always supplied to the audio signal transmitter 11Q, and multiple infrared light emitting diodes (DI) connected in series are constantly driven, so remote control transmission is not possible. Voice switch (20) of the device (2)
Even when 5) is off, a large amount of current is consumed.

For this reason, there is an audio signal transmission circuit in the device body (1)! 111
It is possible to install a power switch before controlling the power supply to the I, but since it is independent from the power switch on the device itself, it is difficult to operate and it is often forgotten to turn it off, which is not very desirable. .

(c) Problems that the invention attempts to solve The present invention has been made in view of the above points.

The present invention provides a remote control device that prevents wasteful power consumption in the audio signal transmitter of the device body when the audio switch of the remote control transmitter is off.

ni) Between! Means for Solving the Problems The present invention provides a second power switch for controlling the power supply to the audio signal transmitter, and also turns on the first power switch.
The second power switch is controlled by transmitting and receiving an off signal via a remote control signal transmitting and receiving section.

(e) Operation By the means described above, the second power switch is automatically controlled by the on/off signal of the first power switch.

(f) Example An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a schematic circuit diagram of the apparatus of this embodiment, and the same parts as in FIG. 2 are given the same reference numerals, and their explanation will be omitted.

In this embodiment, the output of the audio switch (205) of the remote control transmitter (2) is also supplied to the encoder (212). Therefore, the on/off status of the voice switch! I! The signal representing At- is encoded and further passed through a modulator (2
13) into a remote control signal, and similar to the remote control signal from the operation keys, the infrared light emitting diode photodiode (
A remote control signal is received at D2), demodulated into a code signal by a demodulator (111), and then decoded by an encoder (112). Among these decoded signals, the signals corresponding to the operation keys are used to control the main body of the device. On the other hand, a signal representing the on/off state of the audio switch controls a power switch (104) that controls power supply to the audio signal transmitting circuit 112.

Therefore, when listening to audio by connecting the earphones (3) to the remote control receiver (2), when the audio switch (205) is turned on, the audio signal transmission is energized and the on signal is sent to the remote control signal transmitter (company). ) is converted into a remote control signal and sent. Then, the ON signal J8t/i power switch (
-104) to supply power to the audio signal transmitter ulj. Therefore, it becomes possible to listen to audio using the earphones (3).

On the other hand, when audio is not to be heard using the remote control transmitter (2), when the audio switch (205) is turned off, an off signal is transmitted in the same manner as described above, and the t4 source switch (104) is turned off. Therefore, in this case, the audio signal transmitter 11G becomes inactive on its own, so that no power is wasted.

Note that the audio switch (205) may not be a front switch, but may be one that is linked to the connection of earphones.

Further, the method of transmitting the audio signal may also be a method using FM=ton wave, ultrasonic waves, or the like.

(G) Effects of the Invention According to the present invention as described above, the audio signal transmission S
Since the power supply is automatically controlled depending on whether the audio switch on the remote control unit 1 is turned on or off, unnecessary power consumption* when the earphones are not in use can be prevented.

[Brief explanation of the drawing]

FIG. 1 is a schematic circuit diagram of a remote control device according to an embodiment of the present invention, and FIG. 2 is a schematic circuit diagram of a conventional remote control device. (1)...Equipment main body, (10...Audio signal transmitter,
(104)...Power switch, ■...Remote control signal receiving section, (2)...Remote control transmitter, ■...Audio signal receiving section, (205)...Audio switch, +211.
...Remote control ('4' + transmission capital, (3)... earphones.

Claims (1)

[Claims] (1) A device body comprising an audio signal transmitter for wirelessly transmitting an audio signal and a remote control signal receiver for receiving a remote control signal, and an audio receiver for receiving the audio signal from the audio signal transmitter. a first power switch that controls power supply to the audio receiving section; and a remote control signal transmitting section that creates a remote control signal in response to a key operation and transmits it to the remote control receiving section. A remote control device comprising: a second power switch for controlling power supply to the audio signal transmitter;
A remote control device that transmits and receives an off signal via the remote control signal transmitter and receiver to control the second power switch.