JP3409890B2 - Remote control device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote control device capable of receiving and decoding two types of remote control signals.

[0002]

2. Description of the Related Art Conventionally, a remote control device operated from a remote place has been used for household appliances such as a television receiver and a video tape recorder. As a remote control method (hereinafter referred to as a remote control), an infrared remote control using infrared rays is often adopted.

A carrier burst (CW) modulation method for intermittently outputting a carrier (for example, 38 kHz) by a coded pulse of a digital signal is used for transmitting a remote control signal by infrared rays. This system basically emits a carrier when the digital signal is at "H" level, and the carrier itself corresponds to a signal pulse.

On the receiving side, the infrared signal generated by the intermittently oscillated carrier is received, the pulses of the digital signal are decoded, and control signals for the controlled portion such as power on / off, channel selection, and volume are created.

In general, the format of the remote control signal includes a reader code for determining the start of transmission, a custom code for determining the target device, and then a data code indicating the control content. .

Therefore, conventionally, when the target device is different, the custom code is changed and transmitted.

By allowing a plurality of custom codes to be accommodated in household equipment, it is possible to receive and decode remote control signals having different custom codes.

However, it has been impossible to receive and decode remote control signals having different signal formats, such as a format in which the custom code area is omitted and a format in which the code string has a high transfer rate.

Further, in the remote control signal format used by the user, in order to reliably transfer the remote control signal to the receiving side device, there are considerable redundant parts such as custom codes and parity bits, and a large amount of data can be transmitted at high speed. I didn't want to transfer it.

For example, if an electronic device can receive and decode a format having a high transfer rate of a code string, a system for transmitting the adjustment result of a serviceman in a manufacturing process or a market to a remote control signal and transmitting it to the electronic device is constructed. Easier to do.

[0011]

As described above, the conventional device receives and decodes remote control signals having different signal formats, such as a format in which the custom code area is omitted and a format in which the code string has a high transfer rate. I couldn't do that.

In view of the above problems, the present invention enables remote control signals of different formats to be received and decoded, and easily switches which format of remote control signal to receive and decode. An object of the present invention is to provide a remote control device capable of performing the above.

[0013]

A remote control device according to the present invention according to claim 1 is a first remote control device .
Signal and the first selection instruction signal in the first format.
Forceable first transmission means and for remote control
The second signal and the second selection instruction signal are transferred to the second format.
The second transmitting means capable of outputting the first and second transmitting means.
A reception processing circuit for receiving and processing the output signal from the receiving means.
And the first signal received and processed by the reception processing circuit
And a first decoder capable of decoding the first selection instruction signal.
And a second means that has been subjected to reception processing by the reception processing circuit.
Signal and the second selection instruction signal capable of decoding the second data.
The code means and the signal processed by the reception processing circuit
A first state supplied to the first decoding means, or
Selective to the second state supplied to the second decoding means
And a switch means switchable to the first deco
Decoding means decodes the first selection instruction signal.
Switch the switch means to the second state.
Instead, the second selection is performed by the second decoding means.
When the instruction signal is decoded, the switch means is turned on.
It is provided with a selection means for switching to the first state and a utilization means for utilizing the signals processed by the first and second decoding means.

According to a second aspect of the present invention, there is provided a remote control device according to the first aspect of the present invention, wherein the selecting means is a receiving unit.
When turning on the power of the side device, turn on the switch means.
Switch to a predetermined state of the first or second state
It is characterized by the fact that it has been set up.

[0015]

[0016]

[0017]

According to the invention of claim 1, wherein, in selected to decode the second remote control signal by giving a selection instruction in the first full O over <br/> mat, the second The format of the remote control signal can be switched so that it can be decoded. Conversely, to choose to decode the first remote-control signal, by giving an instruction to select the second formats, it can be switched to allow decoding the format of the first remote control signal.

According to the second aspect of the invention, when the power of the electronic device is turned on, the decoding can be started in the predetermined remote control format.

[0019]

EXAMPLES Examples will be described with reference to the drawings. FIG. 1 is a block diagram showing a remote controller according to an embodiment of the present invention.

In FIG. 1, the remote control transmitter 11 is the first
It is possible to output the first remote control signal 1 in the above format and the selection instruction signal instructing to select the remote control signal 2 in the second format in the first format. Also, the remote control transmitter 1
2 outputs the second remote control signal 2 in the second format, and at the same time, can output the selection instruction signal instructing to select the remote control signal 1 in the first format in the second format. There is. The remote control transmitter 11 or 12 is composed of a transmission circuit including an encoder that creates a transmission signal and an amplification unit, and a light emitting unit such as a light emitting diode that photoelectrically converts the transmission signal and sends it out.

Remote control signal 1 from remote control transmitter 11
Alternatively, the remote control signal 2 from the remote control transmitter 12 is received by the remote control signal receiving unit 14 provided in the receiving side device 13. The remote control signal receiving section 14 is composed of a light receiving section such as a photodiode for photoelectrically converting the remote control signal and an amplifying section for amplifying the converted received signal.

The signal from the remote control signal receiving section 14 is input to the logic circuit section 15 composed of a microcomputer. The logic circuit section 15 includes a signal selection switch 16 and
Remote control signal decoders 17 and 18, and data processing unit 19
It is configured to include. The signal from the remote control signal receiving section 14 is input to the signal selection switch 16, where the output terminals 1 and 2 are selectively switched by a switching signal. The signal output from one output end 1 of the switch 16 is input to the first remote control signal decoder 17, and the signal output from the other output end 2 is input to the second remote control signal decoder 18. ing. The switching signal is output from the data processing unit 19 when a selection instruction signal for switching the decoding side is output as a remote control signal from the remote control transmitter 11 or 12.

The first remote control signal decoder 17 is capable of decoding the first remote control signal 1 of the first format from the remote control transmitter 11, and the second remote control signal decoder 18 is the first remote control signal decoder 18 from the remote control transmitter 11. It is possible to decode the second remote control signal 2 in the format of 2. The remote control signal decoded by the decoder 17 or 18 is sent to a data processing unit 19 including a D / A converter, where a control signal based on the decoding result is created, power on / off, channel selection, volume control. Various kinds of processing are performed.

FIG. 2 shows an example of the remote control signals 1 and 2. The first remote control signal 1 is, for example, a remote control signal of the first format shown in FIG. 2 (a), and has a format in which a leader code indicating the start of transmission is followed by an 8-bit custom code and an 8-bit data code. Has become. As shown in FIG. 2B, the second remote control signal 2 is a remote control signal of the second format different from that of FIG. 2A, and the 8-bit data code follows the leader code continuously. It is in the form. FIG. 2B shows a format in which the custom code area is omitted and the code string transfer speed is high.

Next, the operation of the logic circuit section 15 of FIG. 1 will be described with reference to FIG.
This will be explained with reference to (a) and (b). FIG. 3A shows the data processing operation when the power of the receiving side device 13 is turned on. First, when the power of the receiving side device 13 is turned on for the first time, the signal selection switch 1 is set so as to start decoding in a predetermined remote control format, for example, the first format.
6 is switched to the output terminal 1 (step S11). Next, after performing a process for turning on the other circuit operations in the device (step S12), the process shifts to a remote control signal input waiting state.

FIG. 3B shows a data processing operation when a remote control signal is input. When a remote control signal is input, first
It is determined whether or not the signal selection switch 16 is switched to the output end 1 (step S21). If the switch 16 is set to the output end 1, the first remote control signal decoder 17 outputs the remote control signal 1 Decode (step S
twenty two). Next, it is judged whether or not there is a switch switching signal (step S23), and if there is a switching signal, the switch 16 is switched to the output terminal 2 (step S24), and the remote control signal input waiting state is entered.

When the signal selecting switch 16 is not the output terminal 1 in step S21, the second remote controller signal decoder 18 decodes the remote controller signal 2 assuming that it is the output terminal 2 (step 25). Next, it is determined whether or not there is a switch switching signal (step S26), and if there is a switching signal, the switch 16 is switched to the output terminal 1 (step S27), and the remote control signal input waiting state is entered.

If there is no switch changeover signal in step S23, a process based on the decoding result of the remote control signal decoder 17 is performed (step S28), and then the state of waiting for remote control signal input is entered.

If there is no switch changeover signal in step S26, after the processing based on the decoding result of the remote control signal decoder 18 is performed (step S28), the remote control signal input waiting state is entered.

As described above, when the receiving side device 13 is powered on, it is determined whether to decode in the first format or the second format. In this embodiment, when the power is turned on, the signal selection switch 1
6 is switched to the output terminal 1, and decoding is automatically started in the first format, for example.

Further, when the remote control transmitter 11 outputs the selection instruction signal for receiving the remote control signal of the second format when the first remote control signal of the first format can be decoded, A switching signal for switching to the second format in the first format is received, and after receiving the switching signal, the switching is automatically performed so as to decode the format of the second remote control signal.

On the contrary, when the remote control transmitter 12 outputs the selection instruction signal for receiving the remote control signal of the first format when the second remote control signal of the second format can be decoded, A switching signal for switching to the first format in the second format is received, and after receiving the switching signal, the switching is automatically performed so as to decode the format of the first remote control signal.

In the above embodiment, the signal selection switch 16 is automatically switched by the selection instruction signal from the remote control transmitter 11 or 12, but it is manually switched by the setting of the receiving side device 13. Of course, it is okay to do so.

[0034]

As described above, according to the present invention, remote control signals of different formats can be received and decoded, and which format of remote control signal can be received and decoded can be easily switched. Become.

[Brief description of drawings]

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

2 is a diagram showing an example of a format of first and second remote control signals in FIG.

3 is a flowchart showing data processing of a logic circuit unit in FIG.

[Explanation of symbols]

11, 12 ... Remote control transmitter (first and second transmitting means) 14 ... Remote control signal receiving section (receiving means) 15 ... Logic circuit section 16 ... Signal selection switch (selecting means) 17, 18 ... Remote control signal decoder ( First and second decoding means) 19 ... Data processing unit (utilization means)

Claims (2)

(57) [Claims] 1. A first signal and a remote control signal.
And the first selection instruction signal can be output in the first format
First transmitting means, second signal for remote control, and second selecting finger
Second transmitter capable of outputting the indicator signal in the second format
And a receiving process of the output signals from the first and second transmitting means.
A reception processing circuit for receiving, and the first signal and the first signal processed by the reception processing circuit.
First decoding means capable of decoding the selection instruction signal of No. 1
And the second signal and the second signal processed by the reception processing circuit.
Second decoding means capable of decoding the second selection instruction signal
And a signal processed by the reception processing circuit for receiving the first decoupling signal.
The first state of supplying to the card means, or the second decoding
Can be selectively switched to the second state in which it is supplied to the driving means.
Switch means, and by the first decoding means.
When the first selection instruction signal is decoded,
The switch means is switched to the second state,
Of the second selection instruction signal by the decoding means of
The switch means is set to the first state.
2. A remote control device comprising: a selection unit for switching to the above and a utilization unit for utilizing a signal processed by the first and second decoding units. 2. The selecting means turns on the power supply of the receiving side device.
When the switch is turned on, the switch means is set to the first or second
The remote control device according to claim 1, wherein the remote control device is switched to a predetermined state among the above states .