JP2004247867A - Optical multi-caster, light transmission system and picture display system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical multi-caster and a light transmission system which can branch an optical signal without deteriorating signal strength, and to provide a picture display system which can control display of a large picture by using the optical multi-caster. <P>SOLUTION: When an optical multi-caster 2 receives the optical signal, it converts the optical signal into an electric signal, distributes it, converts a plurality of the electric signals into the optical signals and transmits them. Thus, the optical signal can be branched without deteriorating signal strength, which differs from direct branching of the optical signal. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an optical multicaster for duplicating the same optical signal a plurality of times, an optical transmission system for transmitting a plurality of optical signals, and a screen display system for controlling a large-screen display.
[0002]
[Prior art]
In a conventional optical transmission system, an optical signal transmitted from a transmitting device is split into a plurality of paths using an optical star coupler, and the same optical signal is transmitted to a plurality of receiving devices. reference).
[0003]
[Patent Document 1]
JP 2001-217773 A (paragraph numbers [0019] to [0022], FIG. 1)
[0004]
[Problems to be solved by the invention]
Since the conventional optical transmission system is configured as described above, the optical signal transmitted from the transmitting device can be transmitted to a plurality of receiving devices. However, since the optical signal transmitted from the transmitting device is branched into a plurality of paths using an optical star coupler, if the number of branches increases, the signal strength of the optical signal after branching deteriorates. Was.
[0005]
The present invention has been made to solve the above-described problems, and has as its object to provide an optical multicaster and an optical transmission system capable of splitting an optical signal without deteriorating signal strength.
Another object of the present invention is to provide a screen display system capable of controlling a display on a large screen by using an optical multicaster capable of splitting an optical signal without deteriorating signal strength.
[0006]
[Means for Solving the Problems]
An optical multicaster according to the present invention is configured such that, when an optical signal is received, the optical signal is converted into an electric signal and distributed, and a plurality of electric signals are converted into optical signals and transmitted.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a configuration diagram showing a screen display system according to a first embodiment of the present invention. In the figure, an optical signal transmission device 1 is composed of, for example, a personal computer, Send. However, the display data itself may be generated by the optical signal transmission device 1 or may be received from another computer or the like.
The optical multicaster 2 is connected to the optical signal transmitting device 1 via an optical fiber, and upon receiving an optical signal transmitted from the optical signal transmitting device 1, duplicates the same optical signal as the optical signal and duplicates the same optical signal. The signal is transmitted to the display control devices 3A to 3F. The display control devices 3A to 3F, which are optical signal receiving devices, are composed of, for example, personal computers. The corresponding display data is extracted, and the display on the displays A to F is controlled according to the display data. The large screen display 4 includes a plurality of displays A to F.
[0008]
FIG. 2 is a configuration diagram showing the optical multicaster 2 of FIG. 1. In the figure, when the optical signal receiving unit 11 receives an optical signal transmitted from the optical signal transmitting device 1, it converts the optical signal into an electric signal. This constitutes a photoelectric conversion unit that outputs the data. The signal distribution unit 12 constitutes an electric signal distribution unit that distributes the electric signal output from the optical signal reception unit 11. The optical signal transmission units 13A to 13F constitute an optical signal transmission unit that receives the electric signal distributed by the signal distribution unit 12, converts the electric signal into an optical signal, and transmits the optical signal.
[0009]
Next, the operation will be described.
First, when generating the display data of the large-screen display 4 or receiving the display data from another computer or the like, the optical signal transmitting apparatus 1 converts the display data into an optical signal using a built-in optical transmitting module. The optical signal is modulated and transmitted to the optical multicaster 2.
[0010]
When receiving the optical signal transmitted from the optical signal transmitting apparatus 1, the optical multicaster 2 duplicates a plurality of optical signals identical to the optical signal and transmits the same optical signal to the display control apparatuses 3A to 3F.
That is, when receiving the optical signal transmitted from the optical signal transmitting device 1, the optical signal receiving unit 11 of the optical multicaster 2 converts the optical signal into an electric signal and outputs the electric signal to the signal distribution unit 12.
When receiving the electric signal from the optical signal receiving unit 11, the signal distribution unit 12 of the optical multicaster 2 distributes the electric signal and outputs the electric signal to the optical signal transmitting units 13A to 13F.
Upon receiving the electric signals distributed from the signal distribution unit 12, the optical signal transmission units 13A to 13F of the optical multicaster 2 convert the electric signals into optical signals and transmit them to the display control devices 3A to 3F.
[0011]
The display control devices 3A to 3F receive the optical signals transmitted from the optical signal transmitting units 13A to 13F of the optical multicaster 2 using, for example, a built-in optical receiving module, and convert the optical signals into display data. Demodulate. Then, display data corresponding to a display area assigned in advance is extracted from the display data, and the display on the displays A to F is controlled according to the display data.
For example, the display control device 3A receives the optical signal transmitted from the optical signal transmitting unit 13A of the optical multicaster 2 and displays display data (this display data is the entire display information of the large screen display 4). Is demodulated, only the display data corresponding to the display A is extracted from the display data, and the display of the display A is controlled according to the display data.
[0012]
Similarly, the display control device 3B receives the optical signal transmitted from the optical signal transmission unit 13B of the optical multicaster 2 and displays display data (this display data is displayed on the entire large screen display 4). (Including information), only display data corresponding to the display B is extracted from the display data, and the display of the display B is controlled according to the display data.
Further, the display control device 3F receives the optical signal transmitted from the optical signal transmission unit 13F of the optical multicaster 2 and displays display data (this display data is the entire display information of the large screen display 4). Is demodulated, only the display data corresponding to the display F is extracted from the display data, and the display of the display F is controlled according to the display data.
[0013]
As is clear from the above, according to the first embodiment, when the optical multicaster 2 receives an optical signal, the optical multicaster 2 converts the optical signal into an electric signal and distributes it, and converts a plurality of electric signals into an optical signal. Since the transmission is performed by transmitting the optical signal, the optical signal can be branched without deteriorating the signal strength, unlike the one in which the optical signal is directly branched.
In addition, according to the first embodiment, the screen display system is configured using the optical multicaster 2 that can branch the optical signal without deteriorating the signal strength. In addition, there is an effect that the control can be performed quickly.
[0014]
In the first embodiment, an example in which the optical transmission system is applied to a screen display system is described. However, the present invention is not limited to this, and is applied to, for example, a relay device for performing long-distance data transmission. You may do so.
Further, in the first embodiment, the optical multicaster 2 divides the optical signal into six. However, the present invention is not limited to this. For example, the optical signal may be branched into seven or more.
[0015]
Embodiment 2 FIG.
In the first embodiment, the optical signal transmitting apparatus 1 and the optical multicaster 2 are connected in a one-to-one manner. However, as shown in FIG. 3, the optical signal transmitting apparatus 1 and the optical multicaster 2 are connected to each other. They may be connected in a 1: N relationship.
In this case, there is an effect that more optical signals can be branched.
[0016]
【The invention's effect】
As described above, according to the present invention, when an optical signal is received, the optical signal is converted into an electric signal and distributed, and a plurality of electric signals are converted into optical signals and transmitted. There is an effect that the optical signal can be branched without causing the deterioration of the intensity.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing a screen display system according to Embodiment 1 of the present invention.
FIG. 2 is a configuration diagram illustrating the optical multicaster of FIG. 1;
FIG. 3 is a configuration diagram showing a screen display system according to a second embodiment of the present invention.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 optical signal transmitting device, 2 optical multicaster, 3A to 3F display control device (optical signal receiving device), 4 large screen display, 11 optical signal receiving unit (photoelectric conversion unit), 12 signal distribution unit (electric signal distribution unit) , 13A to 13F Optical signal transmitting section (optical signal transmitting means).

Claims (4)

When the optical signal is received, the optical signal is converted into an electric signal and output by the photoelectric conversion means, the electric signal distribution means which distributes the electric signal output from the photoelectric conversion means, and the electric signal distribution means distributes the electric signal. An optical multicaster comprising: a plurality of optical signal transmitting means for receiving the electrical signal, converting the electrical signal into an optical signal, and transmitting the optical signal. An optical signal transmitting apparatus for transmitting an optical signal, and an optical multicaster for receiving the optical signal transmitted from the optical signal transmitting apparatus, duplicating a plurality of optical signals identical to the optical signal, and transmitting a plurality of optical signals And, in an optical transmission system including a plurality of optical signal receiving devices that receive the optical signal transmitted from the optical multicaster, the optical multicaster receives the optical signal transmitted from the optical signal transmitting device A photoelectric conversion unit that converts the optical signal into an electric signal and outputs the electric signal, an electric signal distribution unit that distributes the electric signal output from the photoelectric conversion unit, and receives the electric signal distributed by the electric signal distribution unit. And a plurality of optical signal transmitting means for converting the electric signal into an optical signal and transmitting the optical signal. An optical signal transmitting device that transmits an optical signal that constitutes display data, and an optical signal transmitted from the optical signal transmitting device is received, and a plurality of optical signals identical to the optical signal are duplicated. Receiving an optical signal transmitted from the optical multicaster and extracting display data corresponding to a display area allocated in advance from the optical signal; In a screen display system comprising a plurality of display control devices for controlling the display of a display constituting the unit, the optical multicaster, when receiving an optical signal transmitted from the optical signal transmitting device, converts the optical signal to an electric signal. A photoelectric conversion unit that converts the signal into a signal and outputs the signal; an electric signal distribution unit that distributes the electric signal output from the photoelectric conversion unit; Screen display system receiving the electrical signal, characterized in that it is composed of a plurality of optical signal transmitting means for transmitting and converts the electrical signal into an optical signal. 4. The screen display system according to claim 3, wherein a plurality of optical multicasters are connected to the optical signal transmitting device.

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