JPH02186896A - Wired remote controller - Google Patents

Abstract

PURPOSE:To obtain a two-wire system remote controller for which a separate DC power source is unnecessary at a transmitting side by supplying DC power from a receiving side to the transmitting side with an electrical transmission cable and superimposing a remote control signal from the transmitting side on the direct current of the same electrical transmission cable. CONSTITUTION:A DC power source 1 is provided for the receiving side, and the DC component of the DC power source 1 is electrically transmitted through a transmission low-pass filter 5 to the transmitting side with a transmission cable 3. At the transmitting side, only the DC component is taken out through a reception low-pass filter 6, and the remote control signal is generated by a remote control transmission circuit 4 to be operated by the direct current. This remote control signal is superimposed through a transmission coupling capacitor 8 on the direct current of the transmission cable 3, and at the receiving side, the superimposed remote control signal is received through a reception coupling capacitor 7 to take out only the superimposed remote control signal in a remote control reception circuit 2 and decoded. Thus, the simplified two- wire system remote controller can be obtained, in which the separate DC power source at the transmission circuit side is unnecessary.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a two-wire wired remote control device, and particularly to improving its performance.

[Conventional technology]

In general, there are two ways to remotely control electronic devices such as televisions, VTRs, etc. (hereinafter referred to as remote controls): wireless remote control methods that use light, radio waves, sound, etc. as media, and wired remote control methods that use cables, and the transmitting side consists of an active circuit. There are two types: an active method, which is made up of a number of devices, and a passive method, which is made up of only passive elements such as resistors and capacitors.

Furthermore, in the wired remote control system, there is a multi-wire system that transmits control information on a one-to-one basis, and a two-wire system that transmits control information as a code and decodes it on the receiving side to obtain the original control information.
There is a wire system.

The remote control device according to the present invention relates to a two-wire wired remote control device, and a conventional two-wire wired remote control device is shown in FIG.

In the figure, (1) is a DC power source for a transmitting circuit, (2) is a remote control receiving circuit, (8) is a remote control signal transmission cable, and (4) is a remote control transmitting circuit.

Next, the operation will be explained. DC power is supplied from the DC power supply (1) to the remote control transmitting circuit (4), and then the remote control transmitting circuit (4) transmits a remote control signal corresponding to the transmission content to the receiving circuit through the transmission cable (8).

The transmitted remote control signal is received by the remote control receiving circuit (2) and the transmitted content is decoded.

[Problem to be solved by the invention]

Since the conventional two-wire wired remote control device was constructed as described above, if an active method was attempted, there was a problem in that a separate DC power source was required on the transmitting side if the two-wire method was used.

This invention was made to solve the above-mentioned problems, and it supplies DC power from the receiving side to the transmitting side via a transmission cable, and also transmits the remote control signal from the sending side to the DC power of the same transmission cable. By superimposing the two wires, the object is to obtain a two-wire wired remote control device that does not require a separate DC power source on the transmitting side.

[Means to solve the problem]

The wired remote control device according to the present invention has a DC power source on the receiving side, transmits this DC component to the transmitting side via a power transmission low-pass filter via a transmission cable, and extracts only the DC component through the power receiving low-pass filter on the transmitting side. , a reception coupling in which a remote control signal is generated by a remote control transmitting circuit that operates on direct current, this remote control signal is superimposed on the direct current of the transmission cable via a transmitting coupling capacitor, and only the superimposed remote control signal is extracted on the receiving side. The remote control signal is received by a remote control receiving circuit via a capacitor and then decoded.

[Effect]

The wired remote control device of this invention separates the DC signal from the remote control signal using the power transmission low-pass filter and reception coupling capacitor on the receiving F side, and superimposes the remote control signal on the υ DC using the power reception low-pass filter and the transmission coupling capacitor on the transmitting side. It is sent to the receiving side.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the figure, (1) is a DC power supply for operating the transmitting circuit, (2) is a remote control receiving circuit that decodes remote control signals from the transmitting side, (8) is a transmission cable between the transmitting side and the receiving side, (4) ) is a remote control transmitting circuit that generates a remote control signal corresponding to the transmission content, and (6) is a transmitting low-pass filter that passes only the DC component.The transmitting low-pass filter (6) passes only the DC component and supplies DC power to the remote control transmitting circuit (4). The reception low-pass filter (γ) passes only the remote control signal from the transmitting side superimposed on the DC component to the remote control reception circuit (2
), and (8) is a transmitting coupling capacitor that superimposes the coded remote control signal from the remote control transmitting circuit (4) on the direct current of the transmission cable (8) and transmits it to the receiving side.

Next, I will explain the operation 1. DC power supply (1) on the receiving side
The power is transmitted to the transmitting side via the transmission cable (8) via the transmission low-pass filter (6). On the transmitting side, a receiving low-pass filter (6) extracts only the DC component, and this DC is supplied as power to the transmitting circuit (4).

As a result, the transmitting circuit (4) outputs a remote control signal corresponding to arbitrary transmission contents. The output remote control signal is superimposed on the direct current transmitted by the transmission cable (8) by the transmission coupling capacitor (8) and transmitted to the receiving side. On the receiving side, a receiving coupling capacitor (γ
), the DC component is removed and only the remote control signal is transmitted to the remote control receiving circuit (2). Remote control receiving circuit (2)
Then, it is possible to decode this transmitted remote control signal and perform an operation corresponding to the transmitted content.

In addition, in the above embodiment, a case was shown in which a coil and a capacitor were used for the power transmission low-pass filter and the reception low-pass filter, but a resistor and a capacitor may also be used9.
The remote control transmitting circuit can also be made by generating a frequency, pulse width, pulse frequency or serial code according to the transmission content. [Effects of the Invention] As described above, according to the present invention, it is possible to use a two-wire system without changing the frequency, pulse width, pulse frequency, or serial code. Since the remote control signal is superimposed on the direct current of the transmission cable, a separate DC power supply is not required on the transmitting circuit side of the conventional two-wire wired remote control device, making it possible to obtain an extremely simplified wired remote control device. can.

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a wired remote control device according to an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional wired remote control device. In the figure, (1): DC power supply, (2): Remote control reception circuit, (8): Transmission cable, (4): Remote control transmission circuit, (6): Transmission low-pass filter, +6): Reception low-pass filter% (7 ): Receive coupling capacitor, (8): Transmit coupling capacitor. In addition, the same symbols in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] (1) A DC power source, a power transmission low-pass filter that transmits only the DC component from this DC power source to the outside, a transmission cable that transmits power to the outside via this power transmission low-pass filter, and the DC power transmitted by this transmission cable. A power reception low-pass filter that receives only the DC component from the power supply,
A remote control transmitting circuit that operates with the DC obtained by this power reception low-pass filter and generates a coded signal according to the transmission content, and a remote control signal generated by this remote control transmitting circuit that is transmitted using the DC power transmitted through the transmission cable. a transmitting coupling capacitor that is superimposed on the remote control signal, a receiving coupling capacitor that separates and receives the remote control signal transmitted by the transmission cable from the direct current, and a transmitting coupling capacitor that receives the remote control signal transmitted through the transmission cable by separating the remote control signal from the remote control signal obtained through the receiving coupling capacitor. A wired remote control device characterized by being equipped with a remote control receiving circuit that decodes transmitted content.