JPH02305228A - infrared remote control device - Google Patents

Abstract

PURPOSE:To prevent malfunction or inoperation due to the interference between two signals by using the remote controller as a wired remote controller when plural devices at edit or the like are controlled and inhibiting an infrared ray signal output when the remote controller is connected by a wire. CONSTITUTION:When plural devices are operated simultaneously, an infrared ray remote control transmitter and the devices are connected respectively by connectors and jacks. A detection section 7 (15) detects the wired connection by using a microcomputer 4 (12) and the microcomputer 4 at the infrared ray remote control transmitter stops transmission of an electric signal to an infrared ray LED drive circuit 5. Moreover, the microcomputer 12 at the infrared ray remote control reception section disregards the signal inputted from an infrared ray reception circuit 11. Thus, there is no possibility of sending a signal in error to other device. Since the device side inhibits the reception of an infrared ray signal, the possibility of malfunction by other infrared ray remote control transmitter is precluded.

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an infrared remote control device that does not cause malfunction of each device even when controlling multiple devices at the same time. .

2. Description of the Related Art Recently, various devices have become capable of being controlled by infrared remote control, and there are cases where a plurality of devices located at the same location are controlled by infrared remote control. For example, it is inconvenient for system components such as a stereo or video tape recorder (hereinafter abbreviated as V"I"R) and a television to be placed together, and they are generally installed at the same location. In this case, for example, if there are two devices from the same manufacturer, if you try to operate one device with the remote control, the other device may also operate at the same time. Therefore, in recent equipment, an identification code is provided for each equipment, and the remote controller can control the equipment by switching the equipment 2 according to the equipment using a switch or the like.

Problems to be Solved by the Invention However, the Mfn6 infrared remote control device with the conventional configuration has the following problems when, for example, there are two VTRs from the same manufacturer in almost the same location. .

In other words, there is a problem when editing operations are performed between two VTRs. This editing operation is normally performed as follows. First, put the first VTR (hereinafter referred to as VTRI) into playback mode, play the part you want to edit, and at the same time press the record button on the second VTR (hereinafter referred to as VTR2), and start playback on VTR-1. The signal is recorded on a VTR2 and edited. In this case, if the operation is performed using the operation button on the device, there will be no problem and editing can be done very smoothly. However, video manipulators that use multiple V'rRs to perform operations such as editing are generally very slow.
In overwhelming cases, a single-screen video monitor is used, and the VTR is often placed near the video monitor. Therefore, if you want to operate the equipment while monitoring images on a video monitor, you will have to operate from a position a little far away from the equipment, and you will have to control the equipment using a remote control. In this case, if you pay attention to the duration of the signal from the infrared remote control, depending on the control mode of the device, when you press the control button on the infrared remote control, the signal may be output for a very short period of time, or while the control button is pressed. There are two types that output signals continuously. A case will be described in which the operation performed for the above editing is similarly performed using a remote control. When you press the playback button on the VTRI remote control, you also press the record button on the V'FR2 remote control. When two buttons are pressed at the same time, signals with two different infrared codes propagate through space and reach two VTRs. In such a case, the transmitted infrared signals interfere with each other and do not reach the device as correct signals. In other words, if you press two types of remote control buttons at the same time, neither device may work, or only one may work. When recording or playing back, you can prevent malfunctions by slightly shifting the operations of the two devices, but when editing screen frames (one frame of the screen), it is almost impossible to use the remote control. Since a continuous infrared code signal is output, operation cannot be performed considering the time delay.

An object of the present invention is to provide an infrared remote control device that solves the conventional problems as described above.

Means for Solving the Problems In order to achieve the above object, the present invention comprises an infrared remote control transmitter and an infrared remote control receiver, and the infrared remote control transmitter receives a coded signal from a microcomputer by infrared. An infrared LED drive circuit that amplifies the power to the level that can drive the LED, a code signal output circuit that outputs the aforementioned coded signal as an electrical signal, and a jack or jack that outputs this signal to the outside. The Mi+ infrared remote control receiving section includes a connector or a jack connected by the aforementioned connection wire, a code signal input section/detection section, Equipped with a photodiode, an infrared receiving circuit, and a microcomputer, when this infrared remote control transmitter is electrically connected to the infrared remote control receiver through a connection line, the infrared rays of the infrared remote control transmitter
The infrared remote control device is configured to prohibit the output of the D drive circuit and further prohibit the input of the infrared receiving circuit of the infrared remote control receiving section.

By configuring it as shown in the operation description, it can be used as a wireless remote control using infrared rays for normal device operation, and as a wired remote control when controlling multiple devices such as during editing.
Furthermore, by prohibiting infrared signal output when a wired connection is made, malfunction or non-operation due to interference between the two signals can be prevented.

Embodiment FIG. 1 shows a block diagram of an infrared remote control transmitter according to an embodiment of the present invention, and FIG. 2 shows a block diagram of the same infrared remote control receiver. In FIG. 1, ] is a push button switch operated by the user, 2 is a key scan circuit for detecting which button of the 7-button switch 1 is pressed,
3 is a memory circuit that stores the remote control's infrared code;
4- is a microcomputer that reads out a code signal stored in the storage circuit 3 based on an input signal from the key scan circuit 2, and performs control to send out an electric signal based on the code signal. 5 is an infrared LED drive circuit that amplifies the electrical signal from the microcomputer 4 to the point where it can drive the infrared LED 6; 7 is a detection unit that detects whether a connector or jack is connected; 8 is a jack or connector; 9 is This is a code signal output circuit that outputs a coded remote control signal as an electrical signal. In FIG. 2, 10 is a photodiode that receives an infrared signal emitted from the infrared LED 6, 11 is an infrared receiving circuit that amplifies and decodes the infrared signal received by the photodiode 10, and 2 is an infrared receiving circuit. a microcomputer that controls the equipment by signals from 11;
3 is a shack or a connector; 14 is a code signal input circuit into which a coded electrical signal from the code signal output circuit 9 of the infrared remote control transmitter is input via a jack or connector 13; and 15 is a connector or a connector to which the shack is connected. This is a detection unit that detects whether the

The operation and effect of this embodiment will be explained below. When a user uses an infrared remote control transmitter to remote control a device using infrared signals, the user operates as follows. When the push button 1 is operated, the key scan circuit 2 detects which key has been pressed and notifies the microcomputer 4 of this information.

The microcomputer 4 reads an infrared code corresponding to the key input from the memory circuit 3 and sends an electric signal corresponding to the infrared code to the infrared LED drive circuit 5. Infrared L Y! : The D drive circuit 5 drives the infrared LED 6 and outputs an infrared line signal. This infrared signal reaches the photodiode 11 of the infrared remote control receiver through spatial propagation, is amplified by the infrared receiver circuit 11, and is sent to the microcomputer 12. The microcomputer 12 is
This signal is decoded and the device is controlled according to the button on the infrared remote control transmitter.

Next, a case will be described in which the infrared remote control transmitter and the device are connected by wire. For example, as explained in the conventional example, this usage is particularly effective when a plurality of devices are operated at the same time. When the infrared remote control transmitter and the device are connected using connectors and jacks, the detection units 7 and 15 connect to each microcomputer 4.
12 to inform that it is connected by wire. When the microcombi 4 on the infrared remote control transmitter side receives this signal, it stops sending the electric signal to the infrared LED drive circuit 5. Furthermore, the microcomputer 12 on the side of the infrared remote control receiving section ignores the signal input from the infrared receiving circuit 11. In this way, the infrared remote control transmitter can reliably control the target device, and since it does not transmit infrared signals at the same time, there is no possibility of erroneously sending signals to other devices. Furthermore, since the device side also prohibits reception of infrared signals, there is no risk of malfunction caused by another infrared remote control transmitter.

Effects of the Invention As explained above, the present invention can extremely easily prevent interference caused by the operation of multiple remote controllers by connecting the device and equipment by wire, without changing special circuits or procedures. It is extremely practical and useful, as it can be used as a wireless remote control that can be easily used during operations, or as a wired remote control when complex control is required to operate multiple devices in parallel, such as when editing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an infrared remote control transmitter according to an embodiment of the present invention, and FIG. 2 is a block diagram of an infrared remote control receiving section of the same. 4.12... Microcomputer, 5... Infrared LED drive circuit, 6... Infrared LED, 7.15...
Detection unit, 8.13... Jack or connector, 9.
... Code signal output circuit, 10... Photodiode, 11... Infrared receiving circuit, 13... Jack or connector, 14... Code signal input circuit.

Claims (1)

[Claims] The infrared remote control transmitter is composed of an infrared remote control transmitter and an infrared remote control receiver, and the infrared remote control transmitter includes an infrared LED drive circuit that amplifies the coded signal from the microcomputer to a power that can drive the infrared LED, and the aforementioned coded signal. The infrared remote control includes a code signal output circuit that outputs the signal as an electric signal, a jack or connector that outputs this signal to the outside, and a detection section that detects that a connection line is connected to the jack or connector. The receiving section includes a connector or jack connected by the above-mentioned connection line, a code signal input section, a detection section, a photodiode, an infrared receiving circuit, and a microcomputer.
When this infrared remote control transmitter is electrically connected to the infrared remote control receiver with a connection line, the output of the infrared LED drive circuit of the infrared remote control transmitter is prohibited, and furthermore the input of the infrared receiver circuit of the infrared remote control receiver is prohibited. An infrared remote control device configured to