JPH09181673A - Infrared ray communication equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the communication equipment making accurate communication independently of a receiver of an opposite party. SOLUTION: The equipment is provided with a high speed LED 5 and a low speed LED 6 whose wavelength differs from each other. A CPU 2 is provided with a high speed signal generating section 2a and a low speed signal generating section 2b generating an information signal in matching the stimulated wavelength of the high speed LED 5 and the low speed LED 6 and an information signal changeover section 2c selecting an output of each information signal in matching the stimulated wavelength of the high speed LED 5 and the low speed LED 6 to the high speed LED 5 or the low speed LED 6, a data confirmation input line 7 detecting a signal lighted from the low speed LED 6 and the CPU 2 stops the light emission from the low speed LED 6 based on a change in a communication waveform or an error rate of communication data detected by the data confirmation input line 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an infrared communication device which makes a light emitting diode emit light based on an information signal from an information generating means to perform infrared communication.

[0002]

2. Description of the Related Art Infrared communication is roughly classified into low speed communication performed at low speed and high speed communication performed at high speed. Further, different wavelength bands are used in the low speed communication and the high speed communication.

The wavelength range used for the low speed communication is 900 nm to 1000 nm, and the wavelength range used for the high speed communication is 800 nm to 900 nm.

Infrared communication performed by the above-mentioned low speed communication is
For example, there is a remote controller typified by a TV or VTR (hereinafter, referred to as "remote control"), and this remote control enables simple data communication such as channel and volume.

An infrared communication device 50 for performing the above-mentioned low speed communication is, for example, as shown in FIG. 6, a key matrix 51, a CPU 52, an LED (Light Emitting Diode).
Drive circuit 54 having 53, and PD (Photo Diod
e) A receiver circuit 56 having 55 is provided.

In the above infrared communication device 50, the CPU 5 outputs the modulation signal corresponding to the signal from the key matrix 51.
2 to the drive circuit 54, the LE
D53 emits light.

Next, a light emission signal emitted from another remote control transmitter is input from the PD 55 of the receiving circuit 56,
The signal is amplified by the AMP 57, converted into a demodulated signal by the demodulation circuit 58, and then recognized by the CPU 52.

It should be noted that in remote controllers such as TVs and VTRs,
Since only one-way communication is performed, the remote control transmission unit does not have the receiving circuit 56, and the TV body receiving unit and the VTR body receiving unit do not have the drive circuit 56 and the key matrix 51.

Further, in a simple remote controller, the receiving circuit 56
The demodulation circuit 58 is not used for
Some of them are directly recognized by the PU 52.

On the other hand, the infrared communication performed by high speed communication is
For example, it is used for large-capacity data communication between computers, between a computer and a terminal device such as a printer, or between a computer and an information terminal device such as an electronic notebook.

In the infrared communication device 60 for performing the above high-speed communication, as shown in FIG. 7, a signal input from the CPU 62 of the information device 61 such as a computer, a printer or an information terminal device is sent to the gate array 63. Modulated, L
It is converted into infrared rays by the ED 64 and transmitted.

The signal transmitted from another device is PD65.
Is received by, is amplified by AMP 66, is demodulated by gate array 63, and is recognized by CPU 62.

[0013]

In the above-mentioned conventional infrared communication device, the LEDs 53 and 64 of different wavelength bands are used in low speed communication or high speed communication as described above.

Therefore, using a computer, the T
There is a problem that V and VTR can hardly be operated.

That is, the infrared communication device 6 for high speed communication
LED6 for high speed communication when performing high speed communication at 0
If the LED 53 for low speed communication is used instead of 4, LE
D53 emission speed, that is, LED53 ON, OF
F operation cannot keep up with the speed of high-speed communication. Specifically, as shown in FIG. 8A, the signal output from the gate array 63 is the LED 53 as shown in FIG.
Since the signal does not return to 0V when the signal is turned off when the light is emitted at, the received signal is determined to be HIGH (5V). In this way, the communication data is destroyed.

Here, the LED 64 for high speed communication is O
Aluminum has been added to the chip material gallium arsenide in order to speed up N, OFF operation, and as a result,
Since the emission wavelength is only as short as 800 nm to 900 nm, it is possible to perform low-speed communication with the LED 64.

However, the emission wavelength is 800 nm to 900 nm.
Even if low speed communication is performed at
Usually has a wavelength of about 950 nm,
As a result, since the corresponding wavelengths are different, the communication distance becomes extremely short, for example, 6 cm to 10 cm, and communication cannot be performed from a place several meters away like the current TV remote controller and VTR remote controller.

On the other hand, apart from the above problems, the wavelength range of 900 nm to 1000 nm is used in the old high-speed communication such as the ASK system, while the wavelength range of 800 nm to 900 nm is used in the current DASK and IrDA high-speed communication. It is used. Therefore, when high-speed communication is performed between the current infrared communication device and the old infrared communication device, the LED 64
Since the light emission peak gain of 1 and the reception peak gain of PD 65 are deviated from each other, the communication distance is shortened similarly to the above.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide an infrared communication device capable of reliable communication regardless of the receiver of the other party. .

[0020]

In order to solve the above-mentioned problems, an infrared communication device of the invention according to claim 1 is an infrared communication device which causes a light emitting diode to emit light based on an information signal from an information generating means to perform infrared communication. In the communication device, two or more types of light emitting diodes having different emission wavelengths are provided, and the information generating means includes an adaptive wavelength signal generating means for generating an information signal adapted to the emission wavelength of each of the light emitting diodes, and an adaptive wavelength. Information signal switching means for switching the output to the light emitting diodes of the respective information signals generated by the signal generating means and adapted to the light emission wavelength of the light emitting diodes is provided, while detecting the signal emitted from the light emitting diodes. Detecting means for detecting the change in the communication waveform or the error rate of the communication data detected by the detecting means. And stopping means for stopping the light emission from the light-emitting diode is characterized by being provided.

According to the above configuration, the information signal (hereinafter, referred to as "low speed") adapted to the emission wavelength of the light emitting diode for low speed communication (hereinafter, referred to as "low speed light emitting diode") by the adapted wavelength signal generation means of the information generation means. Information signal) and a high-speed communication light emitting diode (hereinafter, referred to as “high-speed light emitting diode”) emitting wavelengths (hereinafter, referred to as “high-speed information signal”).

Now, for example, it is assumed that the information signal switching means has switched to the low speed information signal.

As a result, the low speed information signal is simultaneously output to the low speed light emitting diode and the high speed light emitting diode, and the low speed light emitting diode and the high speed light emitting diode respectively emit light at the same time.

In this case, when the other party is a receiver for low speed communication, communication can be performed by the light emission signal from the light emitting diode for low speed. At this time, the low speed information signal is also output to the high speed light emitting diode, and is also transmitted from the high speed light emitting diode.

However, even if the low-speed information signal is transmitted by the high-speed light-emitting diode, when the other party is the low-speed communication receiver, the other party has the low-speed communication receiving photodiode. The range is different and the communication distance is reduced. Therefore, the light emission signal from the high speed light emitting diode is not transmitted to the receiver for low speed communication.
Therefore, as described above, the light emission signal from the light emitting diode for low speed enables communication without any problem.

Here, in the low speed information signal, communication cannot be performed when the other party is a receiver for high speed communication.

At this time, the information signal switching means switches to the high-speed information signal. As a result, the high speed information signal is simultaneously output to the low speed light emitting diode and the high speed light emitting diode, and simultaneously transmitted from the low speed light emitting diode and the high speed light emitting diode.

In this case, since the other party is the receiver for high speed communication, communication can be performed by the light emission signal from the high speed light emitting diode. At this time, the high speed information signal is also output to the low speed light emitting diode, and the low speed light emitting diode is also transmitting. However, even if the high speed information signal is output to the low speed light emitting diode and transmitted by the low speed light emitting diode, the ON / OFF operation of the low speed light emitting diode cannot keep up with the speed of the high speed information signal. Therefore, the communication data is destroyed.

At this time, since the detecting means detects the transmission signal emitted from the light emitting diode, the low speed light emitting diode of the low speed light emitting diode is detected based on the change of the communication waveform detected by the detecting means or the error rate of the communication data. Stop the flash.

This prevents interference due to simultaneous communication between the high speed light emitting diode and the low speed light emitting diode,
As described above, the light emission from the high speed light emitting diode according to the high speed information signal enables communication to the high speed communication receiver without any problem.

In the case of communication using a high-speed information signal, the other party may be an old type high-speed communication receiver or low-speed communication receiver. At this time, the other party receives it by the photodiode for low speed communication.

Therefore, the transmission signal from the high speed light emitting diode is not transmitted to the old type high speed communication receiver or the low speed communication receiver on the other side due to the decrease of the communication distance.

On the other hand, in the light emission signal from the low speed light emitting diode based on the high speed information signal, the communication data is destroyed as described above.

At this time, since the detecting means detects the transmission signal emitted from the light emitting diode, the stopping means is
The light emission of the low speed light emitting diode is stopped based on the change in the communication waveform or the error rate of the communication data detected by the detecting means. This makes it possible to prevent communication with destroyed communication data.

In the above, in order to enable communication, the information signal switching means may switch to the low speed information signal.

Therefore, it is possible to provide an infrared communication device capable of reliable communication regardless of the receiver of the other party, and to reliably and accurately communicate from a high speed communication device such as a computer to a low speed communication device such as a TV. It can be carried out.

The infrared communication device of the invention according to claim 2 is
In order to solve the above problems, in the infrared communication device according to claim 1, the detecting means is connected to the light emitting diode, and extracts and detects a light emission signal from the light emitting diode.

According to the above arrangement, the detecting means extracts and detects the light emission signal from the light emitting diode. Therefore, the design can be changed only for the transmitter, and the structure can be simplified.

The infrared communication device of the invention according to claim 3 is
In order to solve the above problems, in the infrared communication device according to claim 1, a photodiode is provided for receiving a light emission signal from the light emitting diode, and the detection means is connected to the photodiode and the detection means is connected to the photodiode. It is characterized by receiving and detecting a light emission signal from the light emitting diode.

With the above arrangement, the light emitting signal from the light emitting diode is received by the photodiode, and the detecting means detects the light emitting signal from the light emitting diode in the photodiode.

Therefore, the infrared communication device having the transmitter equipped with the receiving part can be used, which can be easily carried out and the cost increase can be prevented.

[0042]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] The following will describe one embodiment of the present invention with reference to FIGS.

The infrared communication device of this embodiment has a CPU 2 provided in a computer 1, as shown in FIG. Although the CPU 2 is used in the present embodiment, the present invention is not limited to this, and it is also possible to use, for example, a gate array.

The CPU 2 has a high speed LE which will be described later.
A high-speed signal generator 2a as a compatible wavelength signal generating means for generating an information signal compatible with the emission wavelength of D5 and an LE for low speed.
There is provided a low-speed signal generating section 2b as a suitable wavelength signal generating means for generating an information signal suitable for the emission wavelength of D6.

The high-speed signal generator 2a generates a high-speed information signal, while the low-speed signal generator 2b generates a low-speed information signal.

Further, the CPU 2 has an information signal switching means for switching to output either the information signal generated by the high speed signal generating section 2a or the low speed signal generating section 2b to the high speed LED 5 and the low speed LED 6. The information signal switching unit 2c is provided.

Further, the CPU 2 calculates the change of the communication waveform or the error rate of the communication data based on the detected value by the data confirmation input line 7 as the detecting means which will be described later, and performs the above detection based on the calculated value. Low speed LED 6
It has a function as a stopping means for stopping the light emission from the.

Further, in the present embodiment, the above C
Two drive circuits 3 and 4 are connected to PU2.

The drive circuit 3 includes a light emitting diode (hereinafter, referred to as "LED (Light Emit) for high speed communication.
(referred to as a “Ting Diode”) is provided.

The high-speed LED 5 is made of gallium arsenide, which is a chip material, with aluminum added, and emits light having a wavelength of 800 nm to 900 nm.

On the other hand, the drive circuit 4 has a low speed LED 6 as a light emitting diode for low speed communication.
Is provided.

The low-speed LED 6 is made of gallium arsenide as a chip material, and has a light emitting region of 900 nm to 100 nm.
It emits light with a wavelength of 0 nm.

Therefore, in this embodiment, two kinds of light emitting diodes having different emission wavelengths, that is, the high speed LED 5 and the low speed LED 6 are provided.

On the other hand, in the drive circuit 4 provided with the low speed LED 6, as shown in FIG.
A data confirmation input line 7 as a detecting means is provided between the CPU 6 and the CPU 2, and the data confirmation input line 7 is composed of a capacitor 8 and an amplifier (AMP) 9.

The operation of the infrared communication device having the above configuration will be described. In the infrared communication device of the present embodiment, FIG.
As shown in, the high speed signal generator 2a in the CPU 2 of the computer 1 generates a high speed information signal, and the low speed signal generator 2b generates a low speed information signal.

The above-mentioned high-speed information signal is suitable for the high-speed LED 5 and the low-speed information signal is suitable for the low-speed LED 6.

Now, for example, it is assumed that the information signal switching section 2c switches to the low speed information signal. This gives 2
The two drive circuits 3 and 4 are simultaneously driven, the low speed information signal is simultaneously output to the low speed LED 6 and the high speed LED 5, and the low speed LED 6 and the high speed LED 5 emit light at the same time.

At this time, the wavelength of 90
Infrared light of 0 nm to 1000 nm is emitted, and LE for high speed is used.
Infrared light having a wavelength of 800 nm to 900 nm is emitted from D5.

In this case, when the other party is the receiver for low speed communication, the light emission signal from the low speed LED 6 enables communication. At this time, the low-speed information signal is the high-speed LE.
It is also output to D5, and the high speed LED 5 emits light at the same time. However, even if the low-speed information signal is emitted by the high-speed LED 5, when the other party is a receiver for low-speed communication such as a TV or VTR, the other party usually has a wavelength of about 9
Since it has a PD (Photo Diode) of 50 nm, the communication wavelength range is different and the communication distance is reduced.

That is, the infrared light having a wavelength of 800 nm to 900 nm emitted from the high speed LED 5 has a wavelength of about 9 above.
When inputting to a PD of 50 nm, the communication peak becomes extremely short, for example, 6 cm to 10 cm because the reception peak gain and the LED light emission peak gain deviate from each other.

Therefore, the signal cannot be transmitted to the receiver for low speed communication on the other side, which is a normal distance, for example, several meters away.
Therefore, as described above, since the infrared light having a wavelength of 900 nm to 1000 nm is output from the low speed LED 6, the information from the CPU 2 of the computer 1 can be input to the PD having a wavelength of about 950 nm. The light emission signal from the LED 6 for communication enables communication without problems.

Here, in the low-speed information signal, communication cannot be performed when the other party is a receiver for high-speed communication such as a printer.

At this time, the information signal switching section 2c switches to the high-speed information signal. Although this switching is performed manually, it can also be performed automatically.

As a result, the high-speed information signal is changed to the low-speed L signal.
Simultaneously output to ED6 and LED5 for high speed, L for low speed
The signals are simultaneously transmitted from the ED 6 and the high speed LED 5.

In this case, since the other party is the receiver for high speed communication, communication can be performed by the light emission signal from the high speed LED 5. At this time, the high speed information signal is transmitted to the low speed LED 6
Is also output, and the transmission is also performed from the low speed LED 6. However, even if the high speed information signal is output to the low speed LED 6 and transmitted by the low speed LED 6, the ON / OFF operation of the low speed LED 6 cannot keep up with the speed of the high speed information signal. Therefore, the communication data is destroyed.

However, in the infrared communication device of the present embodiment, the low speed LED 6 emits infrared light, and the low speed LED 6 is connected to the data confirmation input line 7.
The light emission signal of the
Is being entered. Then, the CPU 2 compares the output signal with this light emission signal to confirm whether or not the data is destroyed. If the data is destroyed based on the change in the communication waveform detected by the data confirmation input line 7 or the error rate of the communication data, the CPU 2 turns off the light emission of the low speed LED 6 and stops the drive circuit 4. Let

This prevents data destruction when the high speed LED 6 emits infrared light, and prevents interference due to simultaneous communication between the high speed LED 5 and the low speed LED 6, and as described above, the high speed information signal is used. Light emission from the LED 5 enables communication to the high-speed communication receiver.

Here, a method of confirming whether or not the data is destroyed will be described in detail. In this embodiment, as a method for confirming whether or not the data is destroyed, as shown in FIG. 3, the time from the rising edge a to the falling edge b of the data signal is confirmed to confirm that the data is normal data. It employs a method of judging whether or not it is, that is, a method of catching a change in the communication waveform.

The confirmation as to whether or not the data has been destroyed is not limited to this. For example, as shown in FIG. 4 (a), after confirming the rising edge a, as shown in FIG. 4 (b). In addition, a method of determining whether it is HIGH or LOW at edges b to g at a fixed timing, that is, a method of catching an error rate of communication data is also possible. For example, in FIG. 7B, four edges b, c, d, and e are HI.
If it is GH, it is judged to be the normal data, while the edge d
When only the following is HIGH, that is, when the edges b.c.d are HIGH, and the edges b.c or edge b are HIGH, or the edges f and above are H
IGH, that is, edges b to f are HI
If GH or edges b to g are HIGH, it is possible to determine that the data has been destroyed.

Next, in the case of communication using a high speed information signal, the other party may be an old type high speed communication receiver or low speed communication receiver. At this time, the other party receives it by the photodiode for low speed communication.

Therefore, the light emission signal from the high-speed LED 5 is not transmitted to the old type high-speed communication receiver or the low-speed communication receiver of the other party due to the reduction of the communication distance.

Further, a low speed LED based on a high speed information signal
In the light emission signal from 6, the communication data is destroyed as described above.

At this time, since the data confirmation input line 7 detects the transmission signal emitted from the low speed LED 6, it is based on the change in the communication waveform detected by the data confirmation input line 7 or the error rate of the communication data. Then, the light emission of the low speed LED 6 is stopped. This makes it possible to prevent communication with destroyed communication data.

In order to enable communication in the above, the information signal switching section 2c may switch to the low speed information signal.

As described above, in the infrared communication device of this embodiment, two types of high-speed LEDs having different emission wavelengths are used.
5 and the low speed LED 6 are provided, and the CPU 2 as the information generating means is provided with a high speed signal generating section 2a and a low speed signal generating section 2b for generating information signals matching the emission wavelengths of the high speed LED 5 and the low speed LED 6, respectively. It is provided.

The CPU 2 also includes a high-speed signal generator 2a.
And each high-speed LED generated by the low-speed signal generator 2b
5 or an information signal switching unit 2c for switching the output of each information signal matching the emission wavelength of the low speed LED 6 to the high speed LED 5 or the low speed LED 6 is provided.

Further, based on the data confirmation input line 7 for detecting the signal emitted from the low speed LED 6 and the change in the communication waveform detected by the data confirmation input line 7 or the error rate of the communication data, the above detection is performed. The CPU 2 for stopping the light emission from the low speed LED 6 is provided.

As a result, covered infrared communication becomes possible from low-speed communication in VTRs and TVs to high-speed communication in computers, printers, information terminals, etc., without thereby connecting lines in information equipment such as computers. , VTR, TV, etc. can be controlled.

Further, it is possible to communicate with a device using an infrared communication device for early high-speed communication without shortening the communication distance.

As a result, it is possible to provide an infrared communication device capable of performing accurate communication regardless of the receiver of the other party, and reliable and accurate communication from a high speed communication device such as a computer to a low speed communication device such as a TV. Can be done.

Further, in this embodiment, the data confirmation input line 7 is connected to the low speed LED 6, and the light emission signal from the low speed LED 6 is taken out and detected.

Therefore, the design can be changed only in the transmitter, and the structure can be simplified.

The light emitting diodes in the present embodiment are only two types, that is, the high speed LED 5 and the low speed LED 6, but the light emitting diode is not necessarily limited to this, and two or more types can be used.

[Second Embodiment] The following will describe another embodiment of the present invention with reference to FIG. For convenience of explanation, members having the same functions as the members shown in the drawings of the first embodiment will be described.
The same reference numerals are given and the description is omitted.

In the infrared communication device according to the first embodiment, the data confirmation input line 7 as the detecting means is provided from the drive circuit 4 in the transmitting device to provide the low speed LED.
The light emission signal from 6 was detected.

However, in the present embodiment, the photodiode (P) of the receiving circuit 10 provided in the infrared communication device is
D) 11 is used to detect the light emission signal from the low speed LED 6 through the data confirmation input line 17.

That is, in this embodiment, the LE for low speed is used.
The light emission signal from D6 is received by the PD 11 of the receiving circuit 10, amplified by the amplifier 12, and returned to the CPU 2.

As a result, the CPU 2 compares the output signal with the light emission signal from the low speed LED 6 detected by the PD 11, and confirms whether the data is destroyed. Then, if the data is destroyed, the output signal from the CPU 2 is turned off, the drive circuit 4 is stopped, and the data destruction at the time of the infrared emission of the low speed LED 6 is prevented.

As described above, the infrared communication device of the present embodiment is provided with the PD 11 for receiving the light emission signal from the low speed LED 6, and the data confirmation input line 17 is connected to the PD 11. Low speed LED 6
It receives and detects the light emission signal from.

Therefore, since the infrared communication device having the transmitter equipped with the receiver can be used, it can be carried out easily and the cost increase can be prevented.

[0091]

As described above, the infrared communication device of the invention according to claim 1 is provided with two or more types of light emitting diodes having different emission wavelengths, and the information generating means emits light from each of the light emitting diodes. An adaptive wavelength signal generating means for generating an information signal compatible with the wavelength, and an information signal for switching the output of each information signal compatible with the emission wavelength of each light emitting diode generated by the compatible wavelength signal generating means to each of the light emitting diodes. While the switching means is provided, the detecting means for detecting the signal emitted from the light emitting diode, and the light emitting diode for the detection based on the change of the communication waveform or the error rate of the communication data detected by the detecting means. And a stop means for stopping the light emission from the.

Therefore, it is possible to provide an infrared communication device capable of reliable communication regardless of the receiver of the other party, and reliable and accurate communication from a high speed communication device such as a computer to a low speed communication device such as a TV. There is an effect that can be performed.

The infrared communication device of the invention according to claim 2 is
As described above, in addition to the configuration of claim 1, the detection means is connected to the light emitting diode and is configured to extract and detect a light emission signal from the light emitting diode.

Therefore, since only the transmitter needs to be redesigned, the structure can be simplified.

The infrared communication device of the invention according to claim 3 is
As described above, in addition to the configuration of claim 1, a photodiode for receiving a light emission signal from the light emitting diode is provided, and the detecting means is connected to the photodiode and is connected to the photodiode. The configuration is such that a light emission signal is received and detected.

Therefore, the infrared communication device having the transmitter provided with the receiving part can be used, so that it can be carried out easily and the cost can be prevented from increasing.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an infrared communication device according to the present invention.

FIG. 2 is a circuit diagram showing in detail a drive circuit including a low speed LED of the infrared communication device.

FIG. 3 is a waveform diagram showing a data signal in the infrared communication device.

FIG. 4 is a waveform diagram showing a method of confirming whether or not the data has been destroyed in the infrared communication device, (a) shows a rising edge, and (b) is HIGH at an edge at a constant timing. It shows a state of determining whether it is LOW.

FIG. 5 is a block diagram showing an infrared communication device according to another embodiment of the present invention.

FIG. 6 is a block diagram showing a conventional infrared communication device.

FIG. 7 is a block diagram showing another conventional infrared communication device.

8A and 8B are waveform diagrams showing a state in which communication data is destroyed, where FIG. 8A shows a signal output from a gate array, and FIG. 8B shows a signal when the signal of FIG. Since the signal does not return to 0V when the signal is turned off, the received signal indicates a state where it is determined to be HIGH (5V).

[Explanation of symbols]

 2 CPU (information generating means, stopping means) 2a high speed signal generating section (adaptive wavelength signal generating means) 2b low speed signal generating section (adaptive wavelength signal generating means) 2c information signal switching section (information signal switching means) 5 high speed LED ( Light emitting diode) 6 Low speed LED (light emitting diode) 7 Data confirmation input line (detection means) 11 PD (photodiode) 17 Data confirmation input line (detection means)

Claims (3)

[Claims] 1. An infrared communication device for performing infrared communication by causing a light emitting diode to emit light based on an information signal from the information generating means, and at least two types of light emitting diodes having different emission wavelengths are provided and the information generating means is provided. And an adapted wavelength signal generation means for generating an information signal adapted to the emission wavelength of each of the light emitting diodes, and the above-mentioned respective light emission of each information signal adapted to the emission wavelength of each of the light emitting diodes generated by the adapted wavelength signal generation means. Information signal switching means for switching the output to the diode is provided, while detecting means for detecting the signal emitted from the light emitting diode, and based on the change of the communication waveform detected by the detecting means or the error rate of the communication data. In addition, stop means for stopping the light emission from the light emitting diode for the above detection is provided. Infrared communication device to collect. 2. The infrared communication device according to claim 1, wherein the detecting means is connected to the light emitting diode and extracts and detects a light emission signal from the light emitting diode. 3. A photodiode is provided for receiving a light emission signal from the light emitting diode, and the detecting means is connected to the photodiode and receives and detects a light emission signal from the light emitting diode. The infrared communication device according to claim 1, wherein: