JPH0619265Y2 - Remote control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of use] The present invention relates to a remote control device having a receiving function in addition to a transmitting function by infrared rays, such as a remote control device with a learning function.

[Conventional technology]

 Conventionally, there is an apparatus of this type shown in FIG.

In the figure, reference numeral 1 is an infrared light receiving diode, which receives a remote control signal I to be learned transmitted by infrared light from any remote control device.
Reference numeral 2 is a RAM in the CPU 4 for indicating the signal element of the remote control signal to be learned which is received by the infrared light receiving diode 1.
4a designates a storage area to be stored, and the signal element of the remote control signal stored in the RAM 4a is set to R.
The key operation unit 3a, 3b, which is composed of a large number of keys arranged in a matrix to form a cross point that is operated when being called from a predetermined storage area of the AM 4a, is interlocked with each other to switch the operation mode of the apparatus to a transmission mode and a reception mode. It is a mode switch.

4 operates according to a predetermined control program, analyzes the remote control signal received by the infrared light receiving diode 1, and determines the signal element of the remote control signal R designated by the key operation unit 2.
A CPU which stores in a predetermined storage area of the AM 4b and which reads out a signal element from a predetermined storage area of the RAM 4a by a key operation of the key operation unit 2 to form a remote control signal.
Is. 6 is an infrared light emitting diode, which is CP
The remote control signal constituted by U4 is transmitted by infrared rays to the device to be controlled.

The infrared light receiving diode 1 has its cathode connected to the positive terminal of the DC power supply 7 via the mode changeover switch 3a, its anode connected to the ground via the load resistor 8 and the input of the CPU 4 via the receiving amplifier 9. Port I ₁
It is connected to the. The mode changeover switch 3a is turned on in the reception mode and turned off in the modes other than the reception mode. Further, the changeover switch 3b is turned off in the reception mode and turned on in the transmission mode to set the operation mode of the CPU 4. The infrared light emitting diode 6 has its anode connected to the positive terminal of the DC power supply 7 via the current control resistor 10 and its cathode connected to the transmission transistor 11.
Is grounded through. The transmission transistor 11 is
It is turned on by the remote control signal applied to the base from the output port O ₁ of the CPU 4 in the transmission mode.
Turned off.

In the above configuration, the CPU 4 enters the reception mode operation state when the reception mode is set by the mode changeover switches 3a and 3b. In this state, when an arbitrary key of the key operation unit 2 is operated and a remote control signal to be learned which is transmitted by infrared rays from another remote control device is received by the infrared light receiving diode 1, the remote control signal is an electric signal. After being converted into, the signal is amplified by the reception amplifier 9 and input to the input port I ₁ . The CPU 4 extracts a signal element from the remote control signal input to the input port I ₁ , and stores it in a predetermined area of the RAM 4a corresponding to the operated key of the key operation unit 2.

Next, when the transmission mode is set by the mode changeover switches 3a and 3b, the CPU 4 enters the transmission mode operation state, and when a predetermined key of the key operation unit 2 learned by the above operation is operated, the CPU 4 operates The signal element corresponding to the predetermined key is read from the RAM 4a, the read signal element constitutes a remote control signal, and the remote control signal is output from the output port O ₁ . The remote control signal output from the output port O ₁ is supplied to the base of the transmission transistor 11 to turn on / off the transistor 11, so that the infrared light emitting diode 6 is turned on / off in response to the remote control signal by infrared rays. Send.

[Problems to be solved by the device]

As described above, the conventional remote control device only stores the learned remote control signal in a predetermined area of the RAM as it is, so that a large area in the RAM is used every time one remote control signal is learned. Therefore, when trying to learn many remote control signals, it is necessary to prepare a RAM having a large capacity, which causes a problem of increasing the cost of the device.

Therefore, the present invention has been made in view of the above-mentioned problems of the conventional ones.
An object of the present invention is to provide a remote control device capable of learning a larger number of remote control signals without increasing costs.

[Means and Actions for Solving the Problems]

In order to solve the above problems, a remote control device according to the present invention has a function of transmitting and receiving a remote control signal by infrared rays, and receives the received data of the remote control signal by a predetermined operation designated by a key operation unit in a storage means. In the remote control device for storing the received data in the storage unit, reading the received data from the predetermined storage unit by the key operation of the key operation unit, forming a remote control signal from the read received data, and converting the infrared data into infrared rays for transmission. Comparing a parameter storage means in which a signal element that may constitute the received remote control signal is stored in advance, a signal element in the parameter storage means, and each signal element of the received remote control signal To detect whether they match or are close to each other. The storage means stores the signal element as it is when the detection means detects that they do not match or approximate, and the detection means matches or approximates both. Position information indicating the storage location of the signal element stored in the signal element storage section when not detected, and the parameter storage when the detection means detects that the two match or approximate In the means, the signal configuration storage unit sequentially stores position information indicating a storage location where the signal element is stored, and the signal configuration storage unit.

The remote control device according to the present invention also includes a transmission / reception mode selection means for selecting one of a transmission mode and a reception mode, an electric-infrared conversion element for forward biasing to convert a remote control signal into infrared rays for transmission, and an externally biased external control element. A single infrared light emitting / receiving diode that functions as an infrared-electrical conversion element that receives the infrared light from the device as an electric signal and receives it as a remote control signal, and the infrared light emitting / receiving diode that is connected in series and should be transmitted during forward bias And a switching means for turning on / off according to the remote control signal to cause a current to flow through the infrared light emitting / receiving diode to emit infrared light, and the transmission / reception mode selection means includes the infrared light emitting / receiving light in the transmission mode. Connect a DC power supply to the diode anode It is characterized by having a changeover switch for switching to connect DC power to the cathode of the infrared light emitting and light receiving diode in the reception mode.

With the above configuration, when the remote control signal is received, the signal element in the parameter storage means is compared with each signal element of the received remote control signal, and it is detected whether the two match or approximate. When it is detected that the two do not match or approximate to each other, the signal element is directly stored in the signal element storage unit, and the position information indicating the storage location of the signal element stored in the signal element storage unit is stored in the signal configuration storage unit. Remember. Further, when it is detected that the both match or approximate to each other, the parameter storage unit stores the position information indicating the storage location storing the signal element in the signal configuration storage unit.

Therefore, in the case of a remote control signal composed of a signal element in the parameter storage means, it suffices to store the position information storing the signal element in the storage means, and in the case of storing the signal element itself. Compared to,
It is possible to store the received remote control signal with a small capacity.

Further, with the above configuration, when the transmission mode is selected by the transmission / reception mode selection means, the changeover switch of the selection means connects the DC power supply to the anode of the infrared light emitting / receiving diode and forward biases. At the time of this forward bias, the switching means turns on / off by a remote control signal to be transmitted, and a current is passed through the infrared light emitting / receiving diode to generate infrared light according to the remote control signal.

On the other hand, when the reception mode is selected by the transmission / reception mode selection means, the changeover switch of the selection means connects the DC power source to the cathode of the infrared light emitting / receiving diode and reverse biases it. At the time of this reverse bias, infrared rays from the outside are converted into electric signals and received as remote control signals.

Therefore, since the infrared remote control signal is transmitted and received by switching the bias of the single infrared light emitting / receiving diode, only one diode element is required.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit diagram showing an embodiment of a remote control device according to the present invention. In the figure, those parts that are the same as those of the conventional example described with reference to FIG. 5 are designated by the same reference numerals, and a detailed description thereof will be omitted.

In FIG. 1, 20 is a GaA shared for transmission and reception.
Infrared light emitting / receiving diodes 3a ₁ , 3a ₂ and 3b made of s, GaA1As are mode changeover switches as transmission / reception mode selection means which are switches interlocking with each other. In particular, the switches 3a ₁ and 3a ₂ perform switching such that the DC power supply 7 is connected to the anode of the infrared light emitting and receiving diode 20 in the transmission mode and the DC power supply 7 is connected to the cathode of the infrared light emitting and receiving diode 20 in the reception mode. It works as a changeover switch. Specifically, the switches 3a ₁ and 3a ₂ have their common terminals connected to the anode and cathode of the diode 20, respectively, and in the transmission mode, the anode of the diode 20 is connected to the positive electrode of the DC power supply 7 via the current limiting resistor 10. To the terminal, the cathode is connected to the collector of the transmission transistor 11 as switching means, and in the reception mode, the anode is connected to the ground and the input of the reception amplifier 9 via the load resistor 8, and the cathode is connected to the positive terminal of the DC power supply 7. To do. Due to the connection by switching the mode changeover switches 3a ₁ and 3a ₂ as described above, the infrared light emitting diode 20 is forward biased by the DC power source 7 in the transmission mode and functions as an original infrared light emitting diode, and is switched by the DC power source in the receiving mode. It is biased in the direction and acts as an infrared light receiving diode.

In this embodiment, the CPU 4 has a ROM 4b in addition to the RAM 4a.
In the ROM 4b, an element for analyzing a remote control signal received by the CPU 4 from another remote control device is stored in advance.
The M4a and the ROM 4b have the configuration shown in FIG.

That is, the RAM 4a includes a parameter storage unit 4a ₁ and a signal configuration storage unit 4a _2, and the parameter storage unit 4a ₁
As shown in FIG. 3, a ₁ stores a signal element of a remote control signal in the form of T _{1 to} T _{4 having} different ON periods and OFF periods, and the signal configuration storage unit 4
The a ₂ configuration of the remote control signal is stored.

In the above configuration, the mode changeover switch 3a ₁ ,
When 3a ₂ and 3b are switched to the reception mode side, the infrared light emitting diode 20 functions as an infrared light receiving diode, and the remote control signal received by the diode 20 is converted into an electric signal and input to the CPU 4. The CPU 4 compares the signal element of the input remote control signal with the parameter stored in advance in the ROM 4b before storing it in the parameter storage unit 4a ₁ of the RAM 4a, and matches or approximates the parameter in the ROM 4b. If there is, the signal element is not stored in the parameter storage unit, and only the address of the ROM 4b storing the parameter is stored in the signal configuration storage unit 4a of the RAM 4a.
Store in ₂ . If there is no match or approximation parameters, stores the signal elements in the parameter storage unit 4a _1, stores the address of the parameter storage unit 4a ₁ to the signal configuration storage unit 4a _2.

More specifically, as shown in FIG. 2, parameters a to d are stored in advance in the addresses a to d of the ROM 4b.
The values of the respective signal elements T _{1 to} T ₄ of the remote control signal of FIG.
Compared to.

Then, when the value of the signal element for T ₁ matches or approximates the parameter, only the address a of the ROM 4b in which the parameter is stored is stored in the signal configuration storage unit 4a ₂ of the RAM 4a. In this example, the same applies to T ₂ and T ₄ . Also, as in the case of T _3, if the value of the signal component does not match or approximate to any parameter-stored in ROM4b the parameter signal elements for the T ₃ in the parameter storage unit 4a ₁ of the RAM 4a ( The address A of the parameter storage unit 4a ₁ in which the parameter (1) is stored in the signal configuration storage unit 4a ₂ is also stored.

It should be noted that the reception data learned from other remote control devices in this manner is fixedly stored in association with each key of the key operation unit 2 as described above. When transmitting the data learned as described above to control the operation of the target device, the mode changeover switches 3a ₁ , 3a ₂ , 3b are set to the transmission mode, and the CPU 4
RAM 4a (parameter storage unit 4a ₁
And the signal configuration storage unit 4a ₂ ) and the data stored in the ROM 4b to reconfigure, output to the output port O ₁ , turn on / off the transmission transistor 11 and drive the diode 20 to convert to infrared rays or the like. Send.

FIG. 4 shows another embodiment, in which switches 3a ₁ ′ and 3a ₂ ′ that are turned on and off in different states in conjunction with each other are used instead of the mode changeover switches 3a ₁ and 3a ₂ and the switch 3a ₁ ′ is used. and between the anode and the resistor 10 of the infrared diode 20, an infrared diode 2 switches 3a ₂ '
The infrared light emitting diode 20 is directly connected to the ground via the load resistor 8 and the cathode is directly connected to the collector of the transmission transistor while being inserted between the cathode of 0 and the DC power supply 7.

In this embodiment, the switch 3 is used in the transmission mode.
The operations similar to those described above with reference to FIG. 1 are performed by turning on / off a ₁ ′ and 3a ₂ ′ and turning off / on the switches 3a ₁ ′ and 3a ₂ ′ in the reception mode.

When the remote control signal storage configuration shown in FIG. 2 is used, the RAM 4a for storing signal elements is provided.
The storage capacity of the parameter storage unit 4a ₁ can be significantly reduced, and a small capacity RAM 4a can be used, which is advantageous in terms of cost.

〔effect〕

As described above, according to the present invention, a plurality of parameters that may constitute the received remote control signal are stored in advance, and this parameter and each signal element of the received remote control signal are stored. By comparing, the information indicating the location where the parameters are stored when the two match, and the signal element is stored as it is when the two do not match,
The storage capacity for storing the learned remote control signal is small, and the cost can be reduced from this point as well.

Further, according to the present invention, the bias of a single infrared light emitting / receiving diode is switched so that it functions as an infrared-electric conversion element during reverse bias and as an electric-infrared conversion element during forward bias, which is expensive. Since only one infrared diode is required, the cost of the remote control device with a learning function can be reduced accordingly.

[Brief description of drawings]

1 is a circuit diagram showing an embodiment of a remote control device according to the present invention, FIG. 2 is a diagram showing a detailed concrete example of a part of FIG. 1, and FIG. 3 is a waveform showing an example of a remote control signal. FIG. 4 is a circuit diagram showing a modified example of a part of FIG. 1, and FIG. 5 is a circuit diagram showing a conventional device example. 2 ... Key operation part, 3a ₁ , 3a ₂ , 3b ... Mode changeover switch (transmission / reception mode selection means, changeover switch),
4 ...... CPU (detecting means), 4a ...... RAM (storage means), 4a ₁ ...... parameter storage unit (signal element storage unit), 4a ₂ ...... signal configuration storage unit, 4b ...... ROM (parameter storing unit) , 7 ... DC power supply, 11 ... Transmitting transistor (switching means), 20 ... Infrared emitting / receiving diode.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI technical display location H04B 10/04 10/06

Claims (2)

[Scope of utility model registration request] 1. A function of transmitting and receiving a remote control signal by infrared rays, storing received data of a received remote control signal in a predetermined storage section designated by a key operation section in a storage means, Received data is read from the predetermined storage unit by a key operation, and a remote control signal is formed by the read received data.
In a remote control device for converting into infrared rays and transmitting the infrared rays, a parameter storage means that stores in advance a signal element that may constitute the remote control signal to be received, a signal element in the parameter storage means, and a reception Comparing with each signal element of the remote control signal, and a means for detecting whether or not both match or approximate, the storage means, the detection means, the two do not match or approximate When the signal element is detected, the signal element storage section stores the signal element as it is, and when the detecting means detects that the two do not match or approximate to each other, the signal element storage section stores the signal element. When it is detected by the detecting means that the position information indicating the place and the both match or approximate, the parameter description Remote control apparatus characterized by the position information indicating the storage location to which the signal element is stored has a successively stored the signal configuration storage unit in section. 2. A transmission / reception mode selection means for selecting one of a transmission mode and a reception mode, an electric-infrared conversion element which is forward biased and converts a remote control signal into infrared rays and transmits the infrared rays, and a reverse biased infrared ray from the outside. A single infrared light emitting / receiving diode that functions as an infrared-electrical conversion element that receives the remote control signal after being converted into an electric signal; and the remote control signal that is connected in series with the infrared light emitting / receiving diode and should be transmitted when forward biased. Switching means for turning on and off according to the above, and causing a current to flow to the infrared light emitting and receiving diode to emit infrared light, the transmission / reception mode selecting means, in the transmission mode, to the anode of the infrared light emitting and receiving diode. Connect the DC power supply, and also receive the infrared light emission in the reception mode. Remote control device as in claim (1) above, wherein characterized in that it comprises a changeover switch for switching to connect DC power to the cathode of the diode.