JPH03178299A - Remote control system - Google Patents

Abstract

PURPOSE:To attain remote control with a correct remote control signal even when a signal by an external interference light is inputted by providing a decoder comparing an output of a photodetection circuit with a remote control code stored in a memory and outputting the remote control signal to a signal transmission line only when they are coincident. CONSTITUTION:A decoder 52 has a memory 52a storing a remote control code for optical communication or a remote control code for wired communication and compares outputs of photodetector circuits 36, 38, 40 with a remote control code stored in the memory 52a and outputs a remote control signal in terms of the remote control code for optical communication or the remote control code for wired communication to a signal transmission line 34 only when they are coincident. Thus, even when an external interference light is projected to the photodetector circuits 36, 38, 40 and a signal by the external interference light is inputted from the photodetector circuit to the decoder 52, no noise signal is outputted from the decoder 52 to the signal transmission line 34 and no noise signal is superimposed on the remote control signal. Thus, the remote control is attained with the correct remote control signal.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a remote control system.

[Conventional technology] FIG. 4 shows a conventional remote control system.

From a given area (for example, a room) to another given area (
For example, you may want to remotely control equipment in another room.

The remote control transmitter 8.10.12.14 is operated from the room 2, 4.6 which is the area to be controlled by remote control, and the audio amplifier 18 placed in the room 16, which is the area to be controlled by remote control, is transmitted to the room 20. It is assumed that a video tape recorder 22 and a room cooler 26 placed in a room 24 are operated by remote control.

A remote control transmitter 10 located in the room 4 is for a video tape recorder 22. Further, the remote control transmitter 12 placed in the room 4 is for the room cooler 26. A remote control transmitter 14 placed in the room 6 is for the audio amplifier 18. The remote control transmitter 14 is capable of outputting a wired remote control signal for electrically controlling the audio amplifier 18 by wire, and an optical remote control signal for controlling the audio amplifier 18 using light. The remote control transmitter 8 placed in the room 2 is a so-called learning remote control transmitter, and can output remote control signals for the audio amplifier 18, the video tape recorder 22, and the room cooler 26 in the form of light. For example, the audio amplifier 18 and room cooler 26 are products of one company, and the video tape recorder 22 is a product of another company.

The audio amplifier 18 electrically receives a remote control signal from a remote control signal input/output terminal to control the remote control 8. Note that it is also possible to receive remote control signals with light and be controlled by remote control, but here, it is operated as an electric remote control device that receives remote control signals electrically. This audio amplifier 13 includes a CD player, a tuner, and the like. Speakers 28 and 30 connected to audio amplifier 18 are arranged in room 2 and room 6, respectively.

The video tape recorder 22 and the room cooler 26 are
This is an optical remote control device that receives remote control signals using light and is controlled by a remote control. The video tape recorder 22 has
A monitor 32 placed in the room 4 is connected.

The signal transmission line 34 is connected to the room 2. 4. 6. 16.
Wired across 20°24. Light receiving circuit 36.38
．． 40 are placed in rooms 2, 4.6, respectively. The light receiving circuit 36 includes a light receiving element 42, an amplifier circuit 44 that amplifies the output of the light receiving element 42, and a waveform shaping circuit 46 that shapes the waveform of the output output from the amplifier circuit 44. In the waveform shaping circuit 46, the carrier wave is removed. Light receiving circuit 38. The light receiving circuit 40 is also configured similarly to the light receiving circuit 36. Waveform shaping circuit 46 of light receiving circuit 36, 38, 40
The outputs of are respectively connected to signal transmission lines 34.

In the room 20.24, an optical remote control transmitter 48 is connected to the signal transmission line 34, modulates the signal received from the signal transmission line 34 as it is with a carrier wave, and outputs it as light.
．． 50 are provided respectively.

When the remote control transmitter 8 is operated to output a remote control signal for the audio amplifier 18 as light to the light receiving circuit 36, the remote control signal is output from the light receiving circuit 36 to the signal transmission line 34. The audio amplifier 18 is controlled according to a remote control signal from a signal transmission line 34, and, for example, an audio signal reproduced from a CD player, tuner, etc. is transmitted from the audio amplifier 18 to a speaker 28 or a speaker 30.
is sent to and played.

Video tape recorder 22 by operating remote control transmitter 8
When a remote control signal is output as light, the remote control signal is output from the light receiving circuit 36 to the signal transmission line 34. This remote control signal is returned to an optical remote control signal by the optical remote control transmitter 48. The video tape recorder 22 is
It is controlled in accordance with the optical remote control signal output from the optical remote control transmitter 48, and for example, the video tape recorder 2
The video signal played in 2 is displayed on a monitor 3 placed in room 4.
It is played in 2.

When the remote control transmitter 8 is operated to output a remote control signal for the room cooler 261rl in the form of light, the remote control signal is output from the light receiving circuit 36 to the signal transmission line 34.

This remote control signal is returned to an optical remote control signal by the optical remote control transmitter 50. The room cooler 26 is controlled in accordance with an optical remote control signal output from the optical remote control transmitter 50, for example, by turning on the power source to bring the temperature of the room 24 to a set temperature.

In room 4, remote control transmitter 10 and remote control transmitter 1
2 or when remote control transmitter 1 is operated in room 6.
4, a remote control signal is similarly output from the light receiving circuits 38 and 40 to the signal transmission line 34, and the audio amplifier 18, video tape recorder 22, and room cooler 26 can be controlled by remote control.

[Problems to be Solved by the Invention] However, in this conventional remote control system, for example, if there is a light noise source (for example, a strong fluorescent light) in the room 4,
As shown in FIG. 5(1), a noise signal is output from the light receiving circuit 38 provided in the room 4 to the signal transmission line 34. Therefore, even if the remote control signal shown in FIG. 5(2) is output from the light receiving circuit 36, 38, 40, the signal transmission line 34 does not output the remote control signal from the light receiving circuit 38 as shown in FIG. 5(3). noise signals will be superimposed.

Therefore, the correct remote control signal is
8, video tape recorder 22, room cooler 26
This resulted in the remote control not being properly controlled.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned technical problems and to provide a remote control system in which a noise signal due to disturbance light or the like does not flow through a signal transmission line even if there is disturbance light or the like.

[Means for Solving the Problems] In order to solve the above-mentioned technical problems, the present invention has the following configuration.

That is, the remote control system according to claim (1) has a memory for storing a remote control code for optical communication, or a remote control code for optical communication and a remote control code for wired communication, and the remote control code is stored in the output of the light receiving circuit and the memory. Claim (2) further comprising: a decoder that outputs a remote control signal to the signal transmission line as a remote control code for optical communication or a remote control code for wired communication only when the remote control code is compared with the remote control code for optical communication or the remote control code for wired communication. The remote control system according to claim (1) has a memory for storing a remote control code for optical communication and a remote control code for wired communication, is arranged in an area where the optical remote control control device is arranged, and is arranged in an area where the optical remote control control device is arranged, and Claim (3) further comprising: an encoder that receives a remote control code for optical communication from a signal transmission line, encodes it into a remote control code for optical communication, and outputs the remote control signal by light from a light emitting element to an optical remote control control device. In the remote control system according to claim (1) or (2), the signal transmission line includes an optical signal transmission line that transmits a remote control signal using a remote control code for optical communication, and a remote control system that transmits a remote control signal using a remote control code for wired communication. It is characterized by being separated into a wired signal transmission line for transmitting signals.

[Function] In the remote control system of claim (1), the decoder has a remote control code for optical communication or a memory for storing a remote control code for optical communication and a remote control code for wired communication, and and the remote control code stored in the memory, and only if they match, a remote control signal is output to the signal transmission line using the remote control code for optical communication or the remote control code for wired communication.

Therefore, even if disturbance light, etc. is projected onto the light receiving circuit, and a signal due to the disturbance light, etc. is input from the light receiving circuit to the decoder, no noise signal will be output from the decoder to the signal transmission line, and the noise signal will not be transmitted to the remote control signal. There will be no overlap. As a result, the optical remote control device and the electric remote control device can be remotely controlled using the correct remote control signal.

In the remote control system according to claim (2), the encoder has a memory for storing a remote control code for optical communication and a remote control code for wired communication, and is arranged in an area where the optical remote control control device is arranged, and the encoder has a memory for storing a remote control code for optical communication and a remote control code for wired communication. A remote control code for optical communication is received from the signal transmission line and encoded into a remote control code for optical communication, and the light emitting element outputs a remote control signal by light to an optical remote control control device.

Therefore, it is no longer necessary to wire an optical communication signal transmission line in the area where the optical signal control equipment is arranged, increasing the degree of freedom in wiring.

In the remote control system according to claim (3), the signal transmission line includes an optical signal transmission line that transmits remote control signals using a remote control code for optical communication, and a wired signal transmission line that transmits remote control signals using a remote control code for wired communication. It is divided into lines.

Therefore, there is no need to extend wired signal transmission lines or optical signal transmission lines to all areas, and the effort required for wiring is reduced. Furthermore, it becomes possible to use an optical signal transmission line for general use and a wired signal transmission line for exclusive use by one company, increasing the degree of freedom of the system. Moreover, a remote control signal is no longer outputted using an optical communication remote control code to a wired signal transmission line, and the control equipment does not malfunction due to matching of remote control signals.

[Example] Hereinafter, the present invention will be described in detail based on the drawings.

FIG. 1 is a circuit diagram of one embodiment of the present invention, and parts corresponding to those in the prior art are given the same reference numerals and redundant explanation will be omitted.

In this embodiment, the signal transmission line 34 includes an optical signal transmission line 34a that transmits a remote control signal using an optical remote control code for an optical remote control device, and an optical signal transmission line 34a that uses a wired remote control code to transmit a remote control signal for an electrical remote control device. It is divided into a wired signal transmission line 34b for transmitting signals. The optical signal transmission line 34a is connected to rooms 2, 4, 6.20
Wired across. The wired signal transmission line 34b is
Wired across rooms 2,4°6, 22,24.

By separating the signal transmission lines in this way, it is not necessary to wire both signal transmission lines 34 a and 34 b in every room, and the effort of wiring can be saved. Furthermore, it becomes possible to use the optical signal transmission line for general use and the wired signal transmission line for exclusive use by the company, and the degree of freedom in the arrangement of remote control control equipment is increased.

Between the light receiving circuits 36, 38, 40 and the signal transmission line 34, a microcomputer 52, a microcomputer 54. A microcomputer 56 is provided respectively.

The microcomputer 52 internally includes a ROM 52a and a RAM 52b. Microcomputer 52
The output of the amplifier circuit 44 of the light receiving circuit 36 is given to input port 8 of the light receiving circuit 36 . The output of the waveform shaping circuit 46 of the light receiving circuit 36 is applied to the human power port B.

An operation board 58 is connected to the microcomputer 52 . The output port A of the microcomputer 52 is
It is connected to the optical signal transmission line 34a. Output port B of the microcomputer 52 is connected to the wired signal transmission line 34
connected to b.

The ROM 52a contains a remote control code for optical communication of the audio amplifier 16, a remote control code for wired communication,
A remote control code for optical communication and a remote control code for wired communication of the room cooler 26, a program shown in FIG. 2, etc. are stored in advance. A remote control code for the video tape recorder 22 is stored in the RAM 52b. This storage is performed by outputting a remote control signal for the video tape recorder 22 from the remote control transmitter 8, and operating keys on the operation board 58 to store it in the RAM 52b. Therefore, in addition to the audio amplifier 18 and room cooler 26, which are the equipment of the company, it is also possible to remotely control the video tape recorder 22, which is equipment of another company.

In addition, remote control codes for optical communication include, for example, a reader code that informs the receiving side that remote control data will be sent, a custom code determined for each manufacturer and device, and a key pressed on the remote control transmitter. It consists of data codes, etc. The remote control code for wired communication corresponds to the remote control code for optical communication, for example,
The manufacturer's code is removed from the custom code and additional information is added to the data code. This additional information is, for example, the name of the room in which the remote control transmitter was operated.

Note that the remote control code for wired communication is created so that there is no remote control code that is important. As a result, the remote control codes for wired communication will not match, and the audio amplifier 18 and room cooler 26 controlled from the wired signal transmission line 34b will not malfunction.

The microcomputer 52 sees the output of the amplifier circuit 44 through the manual port A and learns the frequency of the carrier wave of the remote control signal output from the remote control transmitter 8.

The microcomputer 52 also includes a waveform shaping circuit 46.
The remote control signal output from the remote control transmitter 8 is known by looking at the output from the human power port B. The carrier wave frequency data obtained from the input port A and the remote control signal data obtained from the input port B are temporarily stored in the RAM 52b (step m). The ROM 52a and RAM 52b are searched for a remote control code for optical communication that matches the stored data (step m2).

In step m3, it is determined whether there is a matching remote control code. If there is a matching remote control code, it is determined whether the remote control code is to be output as a remote control code for optical communication or as a remote control code for wired communication (step m).

This determination is made, for example, by looking at the manufacturer's name from the custom code of a remote control coat for optical communication, and if the code is from another company, it is determined that the remote control code for optical communication is to be output.

If it is a company code, it is determined that it will be output as a remote control code for wired communication.

If the remote control code is for optical communication, the remote control signal is output from the output port A to the optical signal transmission line 34a using the remote control code for optical communication (step ms). If it is a remote control code for wired communication, find the corresponding remote control code for wired communication from the remote control code for optical communication, and output the remote control signal with the remote control code for wired communication from output port B to the wired signal transmission line 34b. (step m6).

In step m3, if there is no matching remote control code, it is determined that it is not a remote control signal, and nothing is output from the output port A.
, exits without outputting from B. Therefore, even if light such as disturbance light is incident on the light receiving circuit 36, the signal due to the disturbance light is transmitted to the optical signal transmission line 34a and the wired signal transmission line 3.
It does not flow to 4b.

Microcomputer 54. , 56 are configured similarly to the microcomputer 52, and the ROMs 52a, 54a, and 56a of the microcomputers 54 and 56 contain a remote control code for optical communication and a remote control code for wired communication for the audio amplifier 16, and a room cooler. 26 remote control codes for optical communication, remote control codes for wired communication, and the program shown in FIG. 2 are stored in advance. RAM 54 of microcomputer 54
The remote control code for the video tape recorder 22 is stored in b by the above storage operation. The above-described storage operation is not performed in the RAM 56b of the microcomputer 56, and nothing is stored therein. This is because the remote control code for the audio amplifier 16 is stored in the ROM 56a.

Therefore, even if light such as external 8L light is incident on the light receiving circuit 38, 40, a signal due to this disturbance light will not flow to the optical signal transmission line 34a and the wired signal transmission line 34b.

In the room 24, an optical remote control optical transmitter 62 used in place of the optical remote control transmitter 50 is connected to the wired signal transmission line 34b, and includes a microcomputer 64 as an encoder and a light emitting element 66. This optical remote control optical transmitter 62 receives a remote control signal of a remote control code for wired communication from the signal transmission line 34 and encodes it into a remote control code for optical communication.

The microcomputer 64 has an internal ROM 64a.

It is equipped with a RAM 64b. This R0M64a, RA~
164b stores a remote control code for wired communication and a remote control code for optical communication corresponding to the remote control code for wired communication.

These remote control codes can be stored in the ROM64, for example.
It may be stored in advance in a.

Also, for example, when setting, the microcomputer 52
When storing data in the RAM 52a, take this microcomputer 64 to room 2 and store it in the microcomputer 6.
It may also be stored in the RAM 64b of No. 4. Also, for example, when setting, the microcomputer 5
2 to send a remote control code for wired communication and a remote control code for optical communication via the wired signal transmission line 34b,
It may also be stored in the RAM of the microcomputer 64. Also, for example, each time the microcomputer 52 transmits a remote control signal, the wired signal transmission line 34
A remote control code for wired communication and a remote control code for optical communication are sent via R of the microcomputer 64.
It may also be stored in AM.

The microcomputer 64 connects to the wired signal transmission line 34
When a remote control signal of a remote control code for wired communication is received via b, a remote control code for optical communication corresponding to the remote control code for wired communication is searched. Add a transmission wave to the searched remote control code for optical communication, and light emitting element 6
Drive 6.

As a result, the room cooler 26 can be controlled by remote control using the remote control signal of the optical communication remote control code. I'J SatL
Ru.

Using the optical remote control transmitter 62 eliminates the need to wire the optical signal transmission line 34a in the room 24, increasing the degree of freedom in wiring. Furthermore, by sending a remote control signal using a remote control code for optical communication from the optical remote control optical transmitter 62 via the wired signal transmission line 34b, it is possible to remotely control optical remote control equipment of our company or other companies that does not have a remote control signal input terminal. In addition, when there are two optical remote control devices that are important to the remote control code for optical communication, if at least one is remotely controlled from the optical remote control transmitter 62, these optical remote control devices will not malfunction, and each of them will be controlled. Can be controlled by remote control.

When the remote control transmitter 8 is operated to output a remote control signal for the audio amplifier 18 as light to the light receiving circuit 36, the remote control signal is output from the light receiving circuit 36 to the microcomputer 52. The above-described check is performed in the microcomputer 52, and a remote control signal is output from the microcomputer 52 to the wired signal transmission line 34b. The audio amplifier 18 is controlled by receiving and receiving remote control signals from the wired signal transmission line 34b, and for example, audio signals reproduced from a CD player, tuner, etc. are sent from the audio amplifier 18 to the room where the remote control transmitter 8 is operated. The signal is sent to the speaker 28 located at 2 and played.

Video tape recorder 22 by operating remote control transmitter 8
When a remote control signal is output as light, the light receiving circuit 36 outputs the remote control signal to the microcomputer 52. The above-described check is performed in the microcomputer 52, and a remote control signal is output from the microcomputer 52 to the optical signal transmission line 34a. This remote control signal is returned to an optical remote control signal by the optical remote control transmitter 48. The video tape recorder 22 is controlled according to an optical remote control signal output from an optical remote control transmitter 48, and, for example, the video signal reproduced by the video tape recorder 22 is reproduced on a monitor 32 placed in the room 4. .

When the remote control transmitter 8 is operated to output a remote control signal for the room cooler 26 in the form of light, the remote control signal is output from the light receiving circuit 36 to the microcomputer 52. The above-described check is performed in the microcomputer 52, and the wired signal transmission line 34b is transmitted from the microcomputer 52 to the wired signal transmission line 34b.
The remote control signal is output. microcomputer 6
4 receives a remote control signal of a remote control code for wired communication from the wired signal transmission line 34b, encodes it into a remote control code for optical communication, and returns it to an optical remote control signal from the light emitting element 66. The room cooler 26 is controlled in accordance with an optical remote control signal output from the optical remote control transmitter 62, for example, by turning on the power and bringing the temperature of the room 24 to a set temperature.

In room 4, remote control transmitter 10 and remote control transmitter 1
2 or when remote control transmitter 1 is operated in room 6.
4, a remote control signal is similarly output from the light receiving circuits 38 and 40 to the signal transmission line 34, and the audio amplifier 18, video tape recorder 22, and room cooler 26 can be controlled by remote control.

Such remote control is performed without being affected by ambient light in the rooms 2, 4, and 6.

FIG. 3 is a circuit diagram of another embodiment of the present invention, and parts corresponding to those in the embodiment of FIG. 1 are given the same reference numerals.

What should be noted in this embodiment is that it is not divided into an optical signal transmission line 34a and a wired signal transmission line 34b, and in the signal transmission line 34, a remote control signal is transmitted using an optical remote control code for an optical remote control control device. and transmitting remote control signals using wired remote control codes for electrical remote control devices.

This signal transmission line 34 is connected to rooms 2, 4, 6, 16°2
Wired across 0 and 24. If there is a remote control code that matches the signal received from the light receiving circuit 36, the microcomputer 52 determines whether to output the remote control code as a remote control code for optical communication or as a remote control code for wired communication, and outputs the remote control code as an optical communication remote control code. If the remote control code is for communication, the remote control signal is output from the output port C to the signal transmission line 34 as a remote control code for optical communication. If it is a remote control code for wired communication, look up the corresponding remote control code for wired communication from the remote control code for optical communication, and output a remote control signal with the remote control code for wired communication from output port C to the signal transmission line 34. .

In this embodiment, there is no need to separate the optical signal transmission line and the wired signal transmission line, and only the signal transmission line 34 is required, thereby simplifying the signal transmission line.

In the above embodiment, the decoder and encoder are constructed using a microcomputer, but they may also be constructed using a digital circuit or the like.

Matco, ROM52a, 54a, 56a, 64a 5 self ↑ remote control code RAM52b, 54b, 5
6b64b may be stored respectively.

[Effects of the Invention] The remote control system of claim (1) has a memory for storing a remote control code for optical communication, or a remote control code for optical communication and a remote control code for wired communication, and It is equipped with a decoder that compares the remote control code stored in the memory and outputs a remote control signal to the signal transmission line as a remote control code for optical communication or a remote control code for wired communication only when they match.

Therefore, even if disturbance light is projected onto the light receiving circuit and a signal due to the disturbance light is manually input from the light receiving circuit to the decoder, no noise signal will be output from the decoder to the signal transmission line, and the noise signal will not be superimposed on the remote control signal. There will be no more trouble. As a result, the optical remote control device and the electric remote control device can be remotely controlled using the correct remote control signal.

The remote control system according to claim (2) includes a memory for storing a remote control code for optical communication and a remote control code for wired communication, and is arranged in an area where the optical remote control control device is arranged, and the remote control system for wired communication is arranged in an area where the optical remote control control device is arranged. It is equipped with an encoder that receives a code from a signal transmission line, encodes it into a remote control code for optical communication, and outputs a remote control signal by light from a light emitting element to an optical remote control control device.

Therefore, there is no need to wire an optical communication signal transmission line in the area where the optical signal control equipment is arranged, and the degree of freedom in wiring increases.

In the remote control system according to claim (3), the signal transmission line includes an optical signal transmission line that transmits remote control signals using a remote control code for optical communication, and a wired signal transmission line that transmits remote control signals using a remote control code for wired communication. It is divided into two lines.

Therefore, it is no longer necessary to extend the wired signal transmission line to all areas using light, and the effort required for wiring is reduced. In addition, optical signal transmission lines can be made for general use.
It becomes possible to use a wired signal transmission line exclusively for your company, increasing the degree of system freedom. In addition, remote control signals are no longer output using optical communication remote control codes to wired signal transmission lines, and the control equipment does not malfunction due to matching of remote control signals.

[Brief explanation of drawings]

The upper figure is a circuit diagram of one embodiment of the present invention, and the second figure is a ROM5
Flowchart 1 of the program stored in 2a,
FIG. 3 is a circuit diagram of another embodiment of the present invention, FIG. 4 is a conventional circuit diagram, and FIG. 5 is a waveform diagram for explaining a case where a noise signal is output to a signal transmission line. 2, 4. 6.16.20.24...Room 18...
Audio amplifier 22...Video tape recorder 26...Room cooler 34...Signal transmission line 34a...Optical signal transmission line 34b...Wired signal transmission line 36, 38.40...Light receiving circuit 52, 54 .56.64...Microcomputer 5
2a 54a, 56a, 64a・-ROM52b
, 54b, 56b, 64b...RAM diagram

Claims (3)

[Claims] (1) A light-receiving circuit that is placed in the area to be controlled by remote control, has a light-receiving element, amplifies the output of the light-receiving element, shapes the amplified output, and outputs it as a remote control signal, and from the area to be controlled by remote control. A signal transmission line that is wired across the area to be controlled by remote control and electrically transmits the remote control signal output from the light receiving circuit; An electric remote control device that is controlled by a remote control in response to a remote control signal, or a remote control signal that receives a remote control signal from a signal transmission line with light.
A remote control system comprising an optical remote control device that is remotely controlled in response to a remote control signal, comprising a memory for storing a remote control code for optical communication, or a remote control code for optical communication and a remote control code for wired communication, The present invention includes a decoder that compares the output of the light receiving circuit and the remote control code stored in the memory, and outputs a remote control signal to the signal transmission line as a remote control code for optical communication or a remote control code for wired communication only when they match. Features a remote control system. (2) It has a memory that stores the remote control code for optical communication and the remote control code for wired communication, is placed in the area where the optical remote control control equipment is placed, and receives the remote control code for wired communication from the signal transmission line. 2. The remote control system according to claim 1, further comprising an encoder that encodes the remote control signal into a remote control code for optical communication and outputs the remote control signal from the light emitting element to the optical remote control control device using light. (3) The signal transmission line is divided into an optical signal transmission line that transmits remote control signals using a remote control code for optical communication, and a wired signal transmission line that transmits remote control signals using a remote control code for wired communication. The remote control system according to claim (1) or (2).