JPH03133225A - Data transmission system - Google Patents

Abstract

PURPOSE:To expand the data transmission range by providing a repeating section between a transmission section and a reception section using infrared rays as a transmission medium. CONSTITUTION:In addition to a data transmission section 1 of nearly the same constitution as that of a conventional system, a reception section 2 displaying a data sent from the transmission section 1, the repeating section 3 applying data transfer resident between the transmission section 1 and the reception section 2 is provided. The repeating section 3 is constituted of a 1st repeater 10 and a 2nd repeater 11 and the 2nd repeater 11 is arranged in the vicinity of the reception section 2 and the 1st repeater 10 is installed to a position in which an infrared-ray signal A sent from the transmission section 1 do not reach directly the reception section 2 such as an adjacent room and both repeaters 10, 11 are connected in the wired state by using the transmission line 12.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field 1] The present invention relates to a system for transmitting data using infrared rays, and particularly relates to a system provided with signal relay means between transmitting and receiving sections.

[Prior Art] Conventionally, when transmitting control data or display data to various devices, infrared rays are often used as a transmission medium, and infrared signals obtained by modulating the infrared rays with predetermined data are often used.

[Problem to be solved by the invention] However, the distance that can be transmitted using infrared rays is at most l.
In addition, there are disadvantages in that the data transmission range is limited to an extremely narrow fixed range, such as within the same room, and the transmission is easily interrupted if there is an obstacle.

The present invention was made in view of such disadvantages, and
It is an object of the present invention to provide a data transmission system in which the mutual positions of the transmitting and receiving sections are suppressed as much as possible by providing a relay section between the transmitting and receiving sections.

A further object of the present invention is to provide a data transmission system suitable for implementation in a data display device.

[Means for Solving the Problems] The data transmission system according to the present invention, as shown in its schematic configuration in FIG. The receiving section 1 includes one or more receiving sections 2 that perform operations corresponding to data sent from the section 1, and a relay section 3 that is located between the transmitting section 1 and the receiving section 2 and exchanges data.

Further, in the relay section 3 described above, a transmitting section l is located at an arbitrary position.
one or more light receiving means for converting the infrared light signal A sent from the light receiving means into an electrical signal, and a light emitting device located opposite the receiving section 2 and converting the electrical signal converted by the light receiving means into a predetermined infrared signal B. and relay means for transmitting the signal input to the light receiving means to the corresponding light emitting means.

[Function] With the above configuration, the infrared signal A sent from the transmitter 1
is once converted into an electrical signal by the light receiving means of the relay section 3, and then sent to a predetermined light emitting means via the relay means.

The light emitting means converts the input signal back into an infrared signal B and sends it to the receiving section 2 located at the opposite position, so that the receiving section 2 performs an operation corresponding to the received data.

[Example] An example in which the present invention is applied to a display data transmission system in a display device is shown below, but the present invention is not limited to this, but can also be applied to a data transmission system in various devices that perform remote control using infrared rays as a data transmission medium. Of course, it can be implemented.

FIG. 2 shows a display device that transmits data only in one direction between two distant points, including a data transmitter 1 having a configuration similar to that of the conventional one, and a receiver that displays data sent from the transmitter 1. In addition to the section 2, the relay section 3 is provided between the transmitting section 1 and the receiving section 2 to exchange data.

The transmitter 1 is housed together with a battery as a power source in a small case, and is configured to be easily carried and operated. The case surface is equipped with a keypad 4 consisting of, for example, a numeric keypad or a function key, and
By housing the predetermined transmission circuit 5 inside the case,
The infrared rays are modulated with the data and carrier signal input via the keypad 4, and a predetermined infrared signal A can be output.

The receiving unit 2 includes a receiving circuit 6 that extracts data from the infrared signal B sent from the relay unit 3, and a display circuit 7 that uses an ECD element as a display means and displays a display corresponding to the extracted data. The device is housed together with the battery in a panel-shaped case, and is attached to the top of a wall or the like.

The present invention is characterized by the configuration of the relay section 3 described above.

The relay unit 3 is composed of a first relay 10 and a second relay 511, and the second relay 1811 is placed near the receiving unit 2, while the first relay 4110 is placed near the transmitting unit 1, such as in an adjacent room.
Infrared signal A sent from the receiving section 2! The rain #I devices 10 and 11 are installed in a location where they cannot be directly reached, and the #I devices 10 and 11 are connected to each other in a wired state using a transmission line 12.

The first relay 510 converts the infrared signal A output from the transmitter 1 into an electrical signal and sends it to the second repeater 11 side, and the light receiving circuit 13 converts the infrared signal A into an electrical signal. Then, it is amplified by the amplifier circuit 14,
Furthermore, by shaping the waveform by the waveform shaping circuit 15,
The signal output from the transmitter 1 is regenerated and amplified. This signal is further matched with the transmission line 12 by the I/F circuit 16, and then sent to the second repeater 11 through the transmission line 12.

The second relay all returns the electric signal sent from the first repeater lO to an infrared signal B that is substantially similar to that output from the transmitter l, and enables it to be sent toward the receiver 2. After taking in the electric signal from the transmission line 12 by the I/F circuit 17, a predetermined modulation is applied to the infrared rays using the light emitting circuit 18, and an infrared signal B which is substantially the same as that output from the transmitter 1 is generated. can be output. The light emitting circuit 18 of the second repeater 11 and the receiving circuit 6 of the receiving section 2 are located at opposing positions. The data is sent as is to the receiving section 2 via the display circuit 7, and a display corresponding to the data is performed on the display circuit 7.

Note that if the operator is near the receiving section 2, the transmitting section 1
By directing the data to the receiving circuit 6 of the receiving section 2, data can be directly exchanged between the transmitting section 1 and the receiving section 2, as in the conventional case.

In FIG. 13, two sets of receiving units 2 and 2 are provided separately, and the first and second repeaters 20
- An example is shown in which data can be transmitted bidirectionally between 21.

In this embodiment, the first and second relay FFs 20 and 2
] have the same basic configuration, and in addition to the light receiving circuit 13 and the light emitting circuit 18 that exchange signals between the transmitting section 1 and the receiving section 2 in the above-described embodiment,
It is equipped with a control circuit 22 that regulates the operation of the entire relay line, and a transmission line in a wireless state is established between the first and second repeaters 20 and 21 using laser light or infrared rays that are more powerful than that output from the transmitter 1. They are joined by 12.

The control circuit 22 uses, for example, a "1-chip microcomputer" and its operation is regulated according to a program stored in advance in a ROM, and transmits data sent from the transmitting section l via the light receiving circuit 13. Once stored in RAM, identify the receiving section 2 to be transmitted and send the data to the corresponding light emitting circuit 18. For example, if there are four receiving sections 2,
By assigning a number (1 to 4) to each receiving section 2 and sending the number specifying the receiving section 2 and display data as a set of data from the transmitting section 1 to the light receiving circuit 13, the control circuit At step 22, the input data is decoded, the receiving section 2 to which the data should be displayed is specified, and the data is sent to the corresponding light emitting circuit 18. At this time, if the light emitting circuit 18 to which data should be sent is located on the other repeater side, the data is sent to the repeaters 20 and 2 through an I/F circuit 25 equipped with a light emitting element 23 and a light receiving element 24.
After data transmission between 1 and 1, the luminophore n on the corresponding repeater side
Send data to 18.

The light emitting circuit] 8 simultaneously sends out infrared signals B to a plurality of sets of receiving units 2 arranged at opposing positions. Here, each receiving unit 2 receives only the data for which its own number is specified.
It is configured so that it can be selected and imported using eight circuits 6, and the captured data is displayed in a display amount n7.

Note that in order to avoid interference between the various infrared signals output from the transmitting section 1 and the relay section 3, it is possible to change the emission wavelength or the carrier frequency of the signals.

Further, the number of repeaters constituting the relay section 3 may be increased to three or more, and the repeaters may be connected in a loop or star shape, etc., as appropriate.

Furthermore, one set of repeaters includes a light receiving circuit 13 and a light emitting circuit 18.
A plurality of light emitting circuits 1.8 may be provided, and the control circuit 22 may relay data to each light emitting circuit 1.8.

[Effects of the Invention] As described above, the present invention provides a transmitter 1 using infrared rays as a transmission medium.
Since the relay section 3 is provided between the transmitter/receiver section l and the receiver section 2,
Restrictions on mutual locations are significantly relaxed, and the range of data transmission is easily expanded.

Furthermore, the transmitter l and the receiver 2 are left with their conventional configurations,
Since it can be constructed by simply adding the relay section 3, it has many advantages, such as the ability to expand the system at low cost.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the basic configuration of the present invention. FIG. 2 is a brick diagram showing an example of the present invention, in which data is transmitted only in one direction. FIG. 3 is a brick diagram showing another embodiment in which data is transmitted bidirectionally between two points. DESCRIPTION OF SYMBOLS 1... Transmission section, 2... Receiving section, 3... Relay section, ]2... Transmission line, 13... Light receiving circuit, 18... Light emitting circuit, 22... control circuit. Inventor Someben Japanese style

Claims (1)

[Claims] 1. A transmitter (1) that uses infrared rays as a transmission medium and sends out an infrared signal (A) modulated with data, and an infrared signal (B
) and performs an operation corresponding to the data sent from the transmitter (1), and a receiver that is located between the transmitter (1) and the receiver (2) and that transfers data. A data transmission system comprising a relay section (3) for converting an infrared signal (A) sent from the transmitting section (1) into an electrical signal, the relay section (3) being located at an arbitrary position. one or more light-receiving means, which is located near the receiver (2) and returns the electric signal converted by the light-receiving means to a predetermined infrared signal (B); and the signal input to the light-receiving means. A data transmission system comprising: a relay means for transmitting a signal to a corresponding light emitting means. 2. There are two sets of the above-mentioned receiving sections (2), each receiving section (2).
) consists of a receiving circuit (6) that extracts data from the infrared signal B, and a display circuit (6) that displays data corresponding to the extracted data.
7), and the relay unit (3) includes a first repeater and a second repeater corresponding to the two sets of receiving units (2), and a transmission path (12) between both repeaters. 2. A data transmission system according to claim 1, wherein the data transmission system is coupled in a data communicable manner.