JP2592431B2 - Information display system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information display system using a broadband transmission line which can collectively display the state of each section such as a building and an apartment house by terminal devices installed in each section and the like. For example, the present invention can be applied to an executive withdrawal information display system in which the withdrawal information of all executives of a company can be displayed in each executive room.

[0002]

2. Description of the Related Art Heretofore, since a company executive is assigned a personal room, it is difficult to grasp the leaving / leaving status of other executives. However, the withdrawal status of other executives is extremely important information for business execution, such as when it is necessary to hold a management meeting urgently. In such a case, in order to confirm the withdrawal status of other executives, it is common to call each executive office one by one via a secretary and make an inquiry.

[0003] In addition, a method of displaying the exit / ingress by switching the front / back of the exit / indication display board of each executive at a predetermined location,
Only the method of turning on and off the lamp of the electric display board of the executive by operating each single signal line from each room has been used. As described above, in the related art, there is no information display system in which the state of each room is collectively displayed by a television receiver installed in each room in a building, an apartment house, or the like.

[0004]

The above-mentioned system for confirming the resignation of each executive by telephone has a problem that as the number of executives increases, the amount of confirmation work increases accordingly, and it is not possible to carry out business smoothly. . In addition, the leaving / indicating sign board method requires that a person go to a predetermined location and make a leaving / indicating sign. And this was another major obstacle to business execution. Also, the display panel method is
There is a problem that every time there is a personnel change, it is necessary to recreate the display board or change the display order of the display board.
Similarly, the lamp method has a problem that every time there is a personnel movement, the wiring relationship between each executive room and the lamp must be checked and reset. The present invention has been made to solve the above-described problem, and an object of the present invention is to collectively display the state of each section as an image in each section.

[0005]

Means for Solving the Problems The configuration of the information display system of the present invention for solving the above problems can be roughly divided into:
It comprises a broadband transmission line, a terminal device, and a center device. The broadband transmission path is a transmission path for transmitting a frequency-multiplexed signal, and a plurality of channels are set by frequency division. One of the channels is provided with a data channel for transmitting data in the form of an RF signal and a video channel for transmitting a video signal. Also, the terminal device is connected to a broadband transmission line and is installed in each of a plurality of sections. The terminal device includes an input unit, a transmission unit, and a video display unit. The input means is means for inputting state data indicating the state of each section. The transmitting means is means for modulating the control data composed of the status data input by the input means and the data specifying each section, and transmitting the modulated control data to the data channel of the broadband transmission path. The video display means is a means for receiving, from a video channel of the broadband transmission path, a video signal including collective display information collectively displaying the state of each section, and displaying the collective display information on the television receiver as a video. The center device is connected to a broadband transmission line, and includes a demodulating unit, a state updating unit, and a video transmitting unit. The demodulation unit is a device that receives a signal transmitted from each terminal from a data channel and converts the signal into control data. The state updating means is means for updating and storing the current state of each section according to the control data output from the demodulating means. The video transmission means is means for converting the collective display information, which collectively displays the current state of each section provided by the state updating means, into a video signal and transmitting the video signal to the video channel of the broadband transmission path.

[0006]

The state data indicating the state of each section, for example, the state data indicating that a person has left or occupied, is input from the input means of the terminal device provided in each section. The state data is input from, for example, a switch having a room exit button, a room presence button, and the like. Control data is composed of the state data and data specifying each section. This control data is converted into an RF signal and transmitted to the data channel of the broadband transmission path.

[0007] The center device inputs the control data transmitted from each section and updates the current state of each section for each section. For example, the information on the exit and occupancy of a person in a certain section is updated in real time. The aggregated display information that aggregates the current state of all these sections is transmitted as a video signal to the video channel of the broadband transmission path. For example, image information indicating all the exits and occupancy of the persons in each section is transmitted.

[0008] The terminal device receives the collective display information from the video channel of the broadband transmission path and displays it on the television receiver. For example, the group display information allows a person who is present in each section to recognize the exit and occupancy status of all persons in other rooms as a visual display.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a specific embodiment. This information display system is configured as shown in FIG. In the building, a broadband transmission line 1 is laid, and the transmission line 1 is connected to terminal devices T1 to Tn and a center device M. The broadband transmission line 1 is a transmission line for transmitting a signal by a frequency division multiplexing (FDM) method.
A data channel for transmitting F-modulated control data and a video channel for transmitting a video signal are provided.

Next, the configuration of the terminal devices T1 to Tn will be described with reference to FIG. A keyboard 21 is connected to a data input terminal of a one-chip microcomputer (hereinafter, referred to as “MPU”) 20 as a main device. The keyboard 21 has matrix and row contacts and column contacts. When any key is pressed, the signal lines in the row and column where the key exists are grounded and input to the MPU 20. The MPU 20 can determine the pressed key based on the position of the low-level, ie, “0”, bit of the input 8-bit data.

The MPU 20 has a DTMF signal generation LS.
I22 (MSM 6234) is connected. This LS
I22 provides DTMF (Dual Tone Multi-Touch) which is the same as the output of the push-button telephone by giving the code data.
LSI with a function to output a signal
It is.

The DTMF signal generating LSI 22 has an RF
A modem 23 is connected. The carrier of the data channel of the transmission line 1 is modulated by the DTMF signal by the RF modem 23, and the modulated RF signal is transmitted to the data channel of the transmission line 1.

On the other hand, an adapter 24 is connected to the transmission line 1, and a video signal received from a video channel of the transmission line 1 is frequency-converted and output to a television receiver 25.

Next, a data processing procedure by the MPU 20 will be described with reference to a flowchart of FIG. Step 10
At 0, it is determined whether or not the state data in the code format has been input as a result of the keyboard 21 being pressed. If state data has been input, at step 102, the state data is decrypted. The state data includes a “*” key indicating presence of a room and code data corresponding to a “#” key indicating exit. "*" If a person is in the room
Press the key, and press the “#” key when leaving.

The MPU 20 transmits this status data to the step 1
Decrypt at 02. If the code data of the "*" key indicating the occupancy is input, in step 104, as shown in FIG. 5, the control data composed of the source ID data and the data indicating the occupancy is the DTMF signal generation LSI.
22.

On the other hand, if it is determined that the "#" key indicating that the user has left the room has been pressed, control data including the source ID data and the data indicating that the user has left the room is output to the DTMF signal generation LSI 22 in step 106. .

As a result, the control data is converted into a series of DTMF signals by the DTMF signal generation LSI 22. Further, the series of DTMF signals is transmitted to the RF modem 23.
The data is converted into the frequency of the data channel and transmitted to the transmission path 1.

Next, the configuration of the center device M will be described with reference to FIG. An RF modem 32 is connected to the transmission line 1, and the RF modem 32 receives an RF signal from a data channel and converts the RF signal into a baseband DTMF signal. DTMF converted to its baseband
The signal is input to the PB receiver LSI31.

The PB receiver LSI 31 has a function of converting a PB signal composed of four low-frequency groups and four high-frequency groups into corresponding 4-bit code data. Such a PB receiver LSI 31 is MSM6920 / 6945B / 684.
3 is known as LSI. The code data converted by the LSI 31 is input to the CPU 30.

The CPU 30 is provided with a ROM 34 in which a control program is stored, and a status data memory 330 for storing status data of each room such as occupancy and exit. or,
The CPU 30 receives an RF signal via the video interface 36.
A modem 35 is connected.

Next, the data processing procedure of the CPU 30 will be described with reference to FIG.
This will be described according to the flowchart of FIG. In step 200, it is determined whether control data has been received from the PB receiver LSI31. If the control data is received, in step 202, control data in a code format is input, and in the next step 204, source ID data is selected from the control data.

Then, in step 206, the status data list as shown in FIG. 7 stored in the status data memory 330 is searched using the received ID data. Then, the received status data, that is, the data indicating the exit or occupancy, is written at the position corresponding to the ID data on the list. In this way, the status data list stores the exit or occupancy of all persons at the current moment.

Next, the process proceeds to step 210, where image data as shown in FIG. 8 is generated based on the state list data. The image data shown in FIG. 8 is the group display information. The image data is displayed by color coding for the chairman, president, vice president A, vice president B and managing director Z, and the exit and occupancy are displayed.

This image data is output to the video interface 36 in step 212 and is modulated by the RF modem 35 into a video signal having a predetermined frequency of the video channel as a carrier. Then, this video signal is transmitted to the transmission path 1. The image of FIG. 8 is displayed on the video signal transmitted on the video channel of the transmission path 1 by the television receivers 25 of all the terminal devices T1 to Tn. By seeing this display in each room, it is possible to easily and easily determine who is in the room and who is leaving the room.

As described above, in this embodiment, only by depressing the keys indicating exit and occupancy, unique ID data stored in advance in the terminal device is generated to indicate exit or occupancy. Since the data is transmitted together with the data, the operation in each room is extremely simple. Whether or not the key has been accepted by the center device can be confirmed by checking the exit display or the presence display immediately displayed on the television receiver.

In the above embodiment, the input means is constituted by a keyboard having 16 keys. However, the input means may be an input means having only two keys corresponding to exit and occupancy.

[0027]

According to the present invention, the state of each section is input by a key input device or the like, and control data including the state data and data specifying each section is converted into an RF signal.
It is transmitted to the data channel of the broadband transmission path. Then, in the center device, R
The F signal is demodulated and converted into control data, and the current state data for each section is updated and stored. In the center device, based on the current state data of each section, image data in which the state of each section is collectively displayed is created, and the image data is transmitted as a video signal to a video channel of a broadband transmission path. This video signal is received by each terminal device, and the set information of the state of each section is displayed as an image by the video display means of the terminal device.

Since the present invention is an apparatus as described above, there is an effect that recognition of the state of all sections is extremely easy in each section. Further, there is an effect that the change of the data specifying each section can be dealt with by changing the memory, and the order of collective display of the state of each section can be easily dealt with by changing the memory of the center device.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a terminal device of an information display system according to a specific embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a center device of the system of the embodiment.

FIG. 3 is a block diagram showing the overall configuration of the system of the embodiment.

FIG. 4 is an exemplary flowchart showing a processing procedure of a CPU of the terminal device of the system of the embodiment.

FIG. 5 is a structural diagram showing a structure of control data of the system of the embodiment.

FIG. 6 is an exemplary flowchart showing the processing procedure of the CPU of the center device of the system of the embodiment.

FIG. 7 is an explanatory diagram showing a data configuration of a status data list managed by the center device of the system of the embodiment.

FIG. 8 is an explanatory diagram showing a group display image of the state of each room displayed on the television receiver of the system of the embodiment.

[Explanation of symbols]

1 Broadband transmission line T1-Tn Terminal equipment M Center equipment

 ──────────────────────────────────────────────────続 き Continuing from the front page (73) Patent holder 000004226 Nippon Telegraph and Telephone Corporation 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo (72) Inventor Shinzo Mizuno 5-37-8 Shiba 5-chome, Minato-ku, Tokyo Hibiya Sogo Equipment Co., Ltd. (72) Inventor Togoro Abe 2--24-18 Chiyoda, Naka-ku, Nagoya City, Aichi Prefecture Inside Aichi Electronics Co., Ltd. (72) Inventor Yoshinori Kano 3--20, Marunouchi, Naka-ku, Nagoya City, Aichi Prefecture No. 6 Inside the cast Co., Ltd. (72) Inventor Nobuo Toriyao 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nippon Telegraph and Telephone Corporation (56) References JP-A-59-191953 (JP, A) JP-A Sho 63-127631 (JP, A)

Claims (3)

(57) [Claims] 1. A data channel for transmitting data,
A broadband transmission line in which a video channel for transmitting a video signal is frequency-multiplexed, and an input unit connected to the broadband transmission line, installed in each of a plurality of sections, and inputting state data indicating a state of each section; and Transmitting means for transmitting control data including the status data and data specifying a transmission source input by the input means to the data channel of the broadband transmission path; and transmitting the video channel of the broadband transmission path. A video display unit that receives the video signal including the collective display information in which the states of the sections are collectively displayed, and that displays the collective display information on a television receiver; and the broadband transmission path. Demodulation means for demodulating a signal of the data channel and converting the signal to the control data. State updating means for updating and storing the current state of each section according to the control data output from the demodulating means; and collective display information collectively displaying the current state of each section provided by the state updating means. And a video transmitting means for converting the video signal into a video signal and transmitting the video signal to the video channel of the broadband transmission path. 2. The transmitting unit of the terminal device generates a PB signal specified by a frequency having the same configuration as a dial signal output to a push phone line in accordance with the control data, and generates the PB signal. 2. The information display system according to claim 1, wherein the information display system is means for converting a frequency of the signal and transmitting the converted signal to the data channel of the broadband transmission path. 3. The demodulation means of the center device is means for frequency-converting the RF signal of the data channel into the baseband PB signal and converting the PB signal into the control data of code data. The information display system according to claim 2, wherein