JP3178479B2 - Remote control transmitter and remote control system - 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 transmitter and a remote control system for controlling functions of a TV receiver, video equipment, audio equipment and the like.
On-time.

[0002]

2. Description of the Related Art In recent home audio / video equipment, a remote control (hereinafter referred to as a "remote control") device which can be remotely operated at a place remote from a main body has become so popular that it can be regarded as a necessity. In this remote control device, a start code for identifying the start of transmission, a category code for identifying the type of device such as a TV receiver, a video tape recorder, a compact disc player, and the like, and an operation key of the remote control transmitter, A key code is used to identify whether the key has been pressed.

[0003] The start code is composed of predetermined bits, for example, so that the state of data "1" is continuous. The category code is composed of, for example, 5 bits, and is determined so that data of “0” and data of “1” form a predetermined combination corresponding to the category. The key code is composed of, for example, 10 bits, and is determined so that “0” data and “1” data are in a predetermined combination corresponding to the key.

Each of these codes is arranged in a time series as shown in FIG. 5, pulse phase modulated, and transmitted using infrared rays or radio waves. The receiver analyzes each of these code signals and performs control as intended by the operator.

[0005]

However, such a remote controller usually uses a common signal for a category code, and may have a variation in consideration of the fact that a plurality of identical devices are provided. There are only two or three types, and since there is no endless variation for economical reasons, product management, and other reasons, one remote control is used when many identical devices are arranged on the receiving side. There is a problem that all devices or a plurality of devices operate by operating the transmitter.

Further, what to prepare as the operation keys of the remote control transmitter is limited by how many keys can be mounted on the operation panel of the transmitter, and it is necessary to remotely control all the operation keys of the main unit. However, there is a problem from the economic point of view, if not impossible, and since only the main items are remotely controlled, there is a problem that the remote control items do not always meet the wishes of all users.

The present invention allows a user to select a category code and a remote operation item in view of such circumstances.

[0008]

SUMMARY OF THE INVENTION In order to solve such a problem, a first aspect of the present invention is to provide a remote control transmitter for transmitting a code signal for controlling a function of a main unit of a receiver. A signal is randomly assigned to each key when a battery is inserted.

According to a second aspect of the present invention, a remote control
The transmitter sends the generated function control code signal when the battery is inserted.
Assigned randomly to each key in the
Control receiver is controlled by a remote control transmitter.
Received the transmitted function control code signal, and
The function control code signal is transmitted to the operation switch provided on the panel surface.
Memory to store the function of the switch and remote
Function control stored in memory from control transmitter
When the function code signal is received,
And a control unit that executes the function of the corresponding operation switch.
It is characterized by

[0010]

According to the first aspect of the present invention, a random code is assigned to each key when the battery is turned on, so that different codes are transmitted for different transmitters.

According to a second aspect of the present invention, the code transmitted from the transmitter of the first aspect is stored in correspondence with the operation key on the receiving side, and when the code corresponding to the stored code is received, The function of the key corresponding to the stored code is performed.

[0012]

FIG. 1 is a circuit diagram showing an embodiment of a remote control transmitter according to the present invention. In FIG. 1, an operation key 1 is an operation key for selecting various functions to be remotely controlled, such as recording start / stop, zoom-in, and zoom-out, and is provided on a panel of a remote control transmitter 8 as shown in FIG. Switch. One end of the operation key 1 is connected to terminals X0 to X3 of the remote control IC3, and the other end is connected to terminals Y0 to Y3 of the IC, thereby forming two key matrices.

When the battery 5 is inserted for the first time in the remote control transmitter 8, a random counter 6 provided in the remote control IC 3 is set to an unspecified value determined by the power-on condition, that is, set at random. The category code and the key code are determined according to the set value of the random counter 6. For this reason, the category code and the key code generated by the remote control transmitter 8 are determined by pure chance, and the possibility that the category code and the key code match if the transmitter is different is very low.

When the battery 5 of the remote control transmitter 8 is replaced, these random codes are held inside the IC by the backup capacitance 7, so that the operation key is pressed even after the battery 5 is replaced. When the battery 5 is inserted for the first time, a remote control code is generated from the infrared LED light emitting element 4 based on a unique random code assigned to an operation key, and operability is guaranteed. .

FIG. 3 is a block diagram showing an embodiment of a main unit including a remote control receiver. The remote control signal transmitted from the infrared LED light emitting element 4 of the remote control transmitter 8 is shown in FIG.
Is supplied to a remote control receiver included in the main unit shown in FIG. The remote control signal is received by the light receiving element 15 and the amplifier 2
3, the data is amplified to a predetermined level, and the demodulator 22 demodulates the data sent from the remote control transmitter.

In the main unit, the microcomputer 11 detects whether or not an operation key 9 on a panel on the main unit has been pressed, similarly to the remote controller. The microcomputer 11 has a memory unit such as a nonvolatile memory 12.

By making the switch 16, the software is made so that the microcomputer 11 enters a special mode state in which learning is performed to make the random code correspond to the operation key. In this state, an arbitrary operation key of the above-mentioned remote controller transmitter 8 is pressed to transmit a random code assigned to the key to the main unit. At the same time, by pressing one of the operation keys of the main unit having a function that the user wants to select with the remote control, the received remote control data and the operation keys of the main unit are stored in the non-volatile memory in one-to-one correspondence.

FIG. 4 is a conceptual diagram showing this operation. After the switch 16 is pressed, the operation key of the remote control transmitter 8 is set to one.
The signal is received by the light receiving element 15 and supplied to the microcomputer 11. At this time, by pressing the operation key 9 on the main body side, the remote control transmitter 8 is stored in the nonvolatile memory 12.
The random code sent from is stored. When this operation is performed for all the operation keys of the remote control transmitter 8, the function selected by each key of the remote control transmitter 8 is determined to be suitable for the user, and
Is stored.

After the above operation, the switch 16 is turned off to release the special mode. In the normal state, the received remote control code is referred to the code stored in the internal non-volatile memory 12, and only when the codes match, is accepted in the same manner as the operation keys of the main body. Generally, at least about 16 bits of code data are used as the remote control code.
The remote control system can perform 5536 types of identification and can be remotely operated only by a specific remote controller without adding an ID code or the like.

Further, since the main body has a feature that the remote control code is stored in association with the main body operation keys, it is possible to operate the main body by performing the above-described learning operation using a remote control of a completely different category at hand. Become.

[0021]

As described above, in the remote control transmitter according to the first aspect of the present invention, since the code to be transmitted is determined by the chance when the battery is turned on, the possibility of transmitting the same code as other transmitters is very high. Therefore, even if many identical devices are arranged, there is an effect that a plurality of devices do not operate by operating one remote control transmitter.

According to a second aspect of the present invention, there is provided a remote control system , wherein a code received by a remote control receiver is stored in association with an operation key of an operation panel on a main body side, and when a code received thereafter matches the stored code. Since the function corresponding to the stored court is executed, there is an effect that the key of the transmitter can be set to the function intended by the user.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of an embodiment of a remote control transmitter according to the present invention.

FIG. 2 is a diagram showing an appearance of the remote control transmitter shown in FIG.

FIG. 3 is a block diagram showing a configuration of an embodiment of a remote control receiver included in the main device.

FIG. 4 is a conceptual diagram of an operation of storing a remote control signal based on a random code transmitted by a remote control transmitter in a memory inside the main unit in association with an operation key;

FIG. 5 is a configuration diagram of a general remote control code;

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 operation key 2, 10 key matrix 3 remote control IC 4 infrared LED light emitting element 5 battery 6 random counter 7 backup capacitance 8 remote control transmitter 9 operation keys on main unit 11 microcomputer 12 nonvolatile memory 15 light receiving element 16 switch 22 demodulation Vessel 23 amplifier

Claims (2)

(57) [Claims] 1. A remote control transmitter for transmitting a function control code signal of a main unit connected to a receiver, wherein a generated code signal is randomly assigned to each key when a battery is inserted. Control transmitter. 2. A remote control for transmitting a function control code signal.
Remote control transmitter , and the remote control transmitter
Receiving a function control code signal, the function control code
Executes control based on signals and is installed on the panel surface.
Remote control that executes control based on the operation of
Remote control with remote control receiver
The remote control transmitter , the remote control transmitter
When the control code signal is
Assigned to the remote control receiver and the remote control receiver transmits the remote control
Receiving the function control code signal and receiving the received function control
Code signal from the operation switch provided on the panel surface.
From the remote control transmitter to the memory for storing the function corresponding to the
When the remembered function control code signal is received,
The operation switch corresponding to the function control code signal.
And a control unit for executing the functions of
Mote control system.