JP2001345767A - Information display system and display terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an information display system and a display terminal capable of erasing information such as advertisements, materials for meeting, and the like displayed on a plurality of display terminals by simple control process. SOLUTION: The information display system is composed of a host station server 1 for storing a plurality of information of advertisement and the like, and a plurality of the display terminals 3 for receiving and displaying information from the host station server 1. The information such as advertisement and the like adds its placing condition and the information displayed on the display terminal 3 is erased by an instruction from the host station server 1 in case of time expiration of placing condition and the like. The display terminals 3 may be categorized into some terminal stations and servers may be provided to each terminal station. The terminal station servers take charge of the managing function of the host station server on the display terminal 3 under control of the terminal station server. When a confidential conference record is displayed from the server to each display terminal, every display on each terminal will be erased in case of elapsed predetermined time.

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 and a display terminal, and more particularly, to an information display system for selectively displaying various kinds of information such as advertisements on a plurality of display terminals or as a so-called electronic conference system. And a display terminal used in the system.

[0002]

2. Description of the Related Art Conventionally, in general public transportation, printed matter is posted as an advertisement on a vehicle, in an airplane, or on a ship. In this case, an operator updates the inside of a vehicle or the like to update the advertisement. It was necessary to go around and replace each time, which was bothersome and caused a resource problem of discarding the printed matter.
This kind of problem is not limited to advertisements in public transportation, but also exists widely in stores, movie theaters, parks, stations, parks, and the like.

On the other hand, in recent years, various display elements using liquid crystal or the like have been developed, and such display elements range from a small one that can be mounted on a portable communication terminal to a paper-like one that is thin and has a wide display area. Various types have been developed. Therefore, an advertisement display system that combines this display element with information communication technology such as the Internet and satellite communication that has been rapidly developed and spread in recent years has attracted attention as an alternative to an advertisement using printed matter. For example, it is a system that distributes advertisement information to a display device such as a personal computer, a mobile phone, or a cash register at a super convenience store.

In this type of advertisement display system, it is important to manage the advertisement information. In particular, after the advertisement information is distributed to the display terminal, the advertisement information to be deleted is specified, and when to delete the advertisement information is managed. Doing so is complicated.

In recent years, at conferences and seminars,
There has been proposed an information display (electronic conference) system including a plurality of display terminals used by participants and a server on the organizer side that transmits information to these display terminals. If the distribution information is confidential, the organizer will need to restrict the take-out. When the display terminal is brought by the participant, the necessity is particularly high.

An object of the present invention is to provide an information display system capable of deleting information such as advertisements displayed on a plurality of display terminals with a simple control.

It is another object of the present invention to provide an information display system which can effectively prevent information such as conference materials displayed on a display terminal from being taken out.

It is another object of the present invention to provide a display terminal capable of deleting information such as conference materials from a display unit as needed.

[0009]

To achieve the above object, an information display system according to a first aspect of the present invention comprises a host station server for storing a plurality of pieces of information and a display terminal for receiving and displaying the information. The information displayed on the display terminal is erased based on an instruction from the host station server when the posting condition becomes inappropriate.

Further, an information display system according to a second aspect of the present invention provides a host station server for storing a plurality of pieces of information, a terminal station server for receiving information from the host station server, and receiving and displaying information from the terminal station server. A display terminal that deletes the information displayed on the display terminal based on an instruction from the terminal station server when the posting condition becomes inappropriate.

The posting conditions are predetermined posting deadlines and conditions contracted between the publisher and the system administrator, and include the cancellation of the contract.

In the information display system according to the first and second inventions, if the posting condition becomes incompatible,
The information displayed on the display terminal is automatically deleted based on an instruction from the host station server or the terminal station server.
That is, the search and deletion instruction of information to be deleted are collectively performed by the server, and the display terminal does not need to perform such management, and can display and delete information with simple control.

In the information display systems according to the first and second aspects, the information stored in the host station server is, for example, advertisement information. By displaying other advertisement information on the display terminal from which the advertisement information has been deleted, it is possible to prevent a decrease in advertisement fee income.

An information display system according to a third aspect of the present invention comprises a server for transmitting information, and a display terminal for receiving and displaying the information transmitted from the server. The display is erased. Further, it is preferable that the reception information stored in the memory of the display terminal be deleted at the same time that the display of the display terminal is deleted due to the occurrence of the predetermined condition.

The predetermined conditions include, for example, an instruction from a server, the lapse of a predetermined time, the lapse of a predetermined time, the separation of the display terminal from the communication unit, the shutoff of the power of the display terminal, or a decrease in the remaining power of the display terminal. At least one of the times.

In the information display system according to the third aspect, when the predetermined condition occurs, the display on the display terminal is deleted. Therefore, when the system is operated in a conference or seminar, it is possible to effectively prevent information to be kept secret as a server user (organizer) from being taken out while being displayed on the display terminal. In particular, when the display terminal is formed of a display medium having a memory property, the display is maintained even when the power is turned off, so that the information erasing process is effective.

Further, in the information display system according to the third invention, the server attaches, to the transmission information, data for identifying that the information to be transmitted is to be erased when a predetermined condition occurs. Preferably, the information is transmitted to the terminal. In this case, when the identification information is attached to the transmitted information, the display terminal erases the display when the predetermined condition occurs.

Further, the display terminal according to the fourth invention erases the display based on the erase instruction transmitted from the server. The display terminal according to the fifth invention deletes the display when the predetermined display continuation condition becomes incompatible. The display terminal according to a sixth aspect of the present invention includes means for automatically deleting the display under predetermined conditions, and prohibits or extends the automatic deletion based on an instruction transmitted from the server. And these fourth, fifth,
A display terminal according to a sixth aspect of the present invention provides a display unit for displaying information, a first display control unit for displaying on the display unit based on the received display data, and a display unit for erasing display contents of the display unit. And two display control means.

[0019]

Embodiments of an information display system and a display terminal according to the present invention will be described below with reference to the accompanying drawings.

(Overall Configuration of Information Display System, FIGS. 1 and 2)
FIG. 1 shows an information display system according to a first embodiment, which is roughly composed of a server 1 installed in a host station and a plurality of display terminals 3. This information display system handles an advertisement as main display information.

The host station server 1 is installed in an advertising agency or a business entity that is an operator of the present system, for example, a railway company, and receives advertisement contents and its posting conditions from an unspecified number of advertisers via the Internet. To receive. Further, the host station server 1 transfers and displays the advertisement content to each display terminal 3, and instructs the display terminal 3 to delete the advertisement content.

The host station server 1 includes a CPU 11, a wired communication interface 12, and a satellite communication interface 13. A RAM 14, a large storage device 15, and a data processing device 16 are connected to the CPU 11. Furthermore, the server 1 includes an image display device 17 and a control device 18 such as a keyboard.

The display terminal 3 is connected to the host station server 1 via a network. The display terminal 3 is located at an arbitrary position such as a front entrance for a building, an elevator hall on each floor, a hanging bulletin board or a wall bulletin board for a train. It is installed in.
As a display medium, a TFT liquid crystal, a nematic liquid crystal, a chiral nematic liquid crystal, an LED, an EL light emitting element, or the like is used. In particular, when a display medium having a memory property such as a chiral nematic liquid crystal is used, the display can be maintained even when the power supply is stopped, which contributes to energy saving.

Each display terminal 3 preferably has an ID, and this ID is used when communicating with the host station server 1. Further, the display terminals 3 may be grouped according to their installation locations.

The advertisement content to be displayed on each display terminal 3 is distributed from the host station server 1. In addition, of the advertising content that has already been published, the one whose contract was concluded at the time of ad posting has expired, the publication has been canceled even during the contract period, or the contents of the advertisement are incomplete or changed In the case where there is a need to replace the ad in the middle of posting, that is, in the case where the advertisement posting condition is inconsistent, the registration number of the nonconforming advertisement content is designated by the server 1 and transmitted to each display terminal 3, and the display terminal The display in 3 is deleted.

After deleting the advertisement content, if there is a new contract advertisement, it is displayed immediately. If there is no new contract advertisement, nothing is displayed or an image such as a landscape is temporarily displayed. Alternatively, an advertisement of the information display system itself may be displayed. If there is any error in the advertising content posted so far, it may be possible to newly charge and display the corrected advertisement.

FIG. 2 shows an information display system according to a second embodiment, which is basically the same as the first embodiment.
The difference is, the display terminal 3 grouped by a particular group constitute a plurality of terminal stations T _1, T ₂ ..., and each terminal station T _1, T ₂
Are managed collectively by the terminal station server 2.

Each terminal station server 2 is connected to the host station server 1 via a network, and the server 1 described in the first embodiment has a function of controlling the display terminal 3.

For example, in the case of a railway company, the display terminals 3 are classified by route or region, or are classified as a group of hanging bulletin boards and a group of wall bulletin boards in one vehicle. As long as they are organized in a state, the grouping itself is arbitrary.

In the second embodiment, a posting contract with an advertiser is made by the host station server 1, and the advertising content and its posting conditions are transferred to the terminal station server 2. The terminal station server 2 distributes the advertising content to the display terminal 3 under its own control, and also issues an instruction for deletion. As described above, since the terminal station server 2 manages the display schedule on each display terminal 3, the management burden on the host station server 1 is reduced.

For example, when the advertiser B applies for an advertisement in the hope of posting on the terminal station T ₁ , the advertising content of the advertiser B is managed by the server 2 of the terminal station T ₁ .

When a large number of display terminals 3 are installed, the terminal station server 2 may have a plurality of stages in order to organize the management system. For example, the first-stage terminal station server can be arranged in the management room of one building, and a plurality of second-stage terminal station servers can be arranged on each floor of the building. In this case, the display terminals 3 arranged on each floor are connected to each second-stage terminal station server. Alternatively, the first-stage terminal server may be arranged in a train compartment, and the second-stage terminal server may be arranged in each vehicle. In this case, a display terminal 3 arranged in each vehicle is connected to the second-stage terminal server.

(Example of installation of display terminal, see FIG. 3) FIG.
An example is shown in which paper-like display terminals 3a and 3b are installed as hanging advertisements in a train car. The advertisement content requested by the advertiser is displayed on the left display terminal 3a, and guidance such as a train line is displayed on the right display terminal 3b.

(Access to Host Station Server, FIGS. 4 to 8)
When the advertiser accesses the advertisement receiving homepage of the host server 1 via the Internet using a personal computer, an advertisement system contract / setting screen shown in FIG. 4 is displayed on the advertiser's personal computer.

The advertiser displays on the screen various desired publication conditions (advertisement category, presence / absence of photo, advertisement size, publication vehicle, period /
Time zone, etc.) and click on the "OK" display on the next screen shown in FIG.
Sent to

Various conditions are selected by selecting from a pull-down list. At this time, it is not always necessary to input all conditions. If there is a blank condition column, the vacancy status of the condition is sent from the host station server 1 with explanation and displayed as shown in the screen shown in FIG. 5, so that additional input can be made in accordance therewith.

FIG. 6 shows a screen when the posting conditions are determined. Here, the contract fee transmitted from the host station server 1 is displayed, and the advertiser inputs the account number. When the display of "Contract Y" is clicked, the screen is switched to the advertisement content setting screen shown in FIG. The advertiser uses this screen to paste necessary pictures and write the contents to be displayed. After the advertisement content is determined, if the display of "determination" is clicked, the display returns to the posting condition determination screen shown in FIG. 6, and if the display of "determination" is clicked here, the advertisement content is transmitted to the host station server 1 together with the publication condition. Is done.

By the way, when the contract term set in the “period / time zone” column shown on the advertising system contract / setting screen of FIG. 4 arrives, in the first embodiment, the host station server From 1 in the second embodiment, erasure is instructed from each terminal station server 2 together with the expired advertisement number, and the display of the advertisement content is erased from the corresponding display terminal 3. Also, when the advertiser offers to cancel the posting contract, the display of the advertising content is similarly erased.

The schedule / charge column shown on the advertisement content setting screen in FIG. 7 is updated, for example, every six months. Therefore, if an advertiser wants to continue running,
It is necessary to replace with a new posting schedule before the update.
However, if the deadline has arrived without updating, the display of the advertisement content itself is continued, only the information in the schedule / charge column is temporarily deleted, and when the new schedule is set up, the display management is started again. With such processing, there is an advantage that the display of the advertisement content is not interrupted.

(Process at Host Station Server, see FIGS. 8 and 9) An example of a processing procedure at the host station server 1 will be described with reference to flowcharts shown in FIGS. The processing procedure described here is based on the premise that each display terminal 2 is provided as an advertising bulletin board in a train.

When the host station server 1 receives the desired publication condition from the advertiser, it executes the publication condition accepting process shown in FIG.

First, conditions are input to the host computer (step S101), and it is determined whether all conditions have been input (step S102). If all the conditions have not been input (NO in step S102), it is checked whether or not the input conditions can be posted, and an empty condition is searched (step S106). If there is no empty condition, it is determined that the posting is "impossible" (step S1).
07), and that effect is transmitted to the advertiser (step S10)
8). If there are free conditions, the free conditions are listed and transmitted to the advertiser (step S109).

Also, after the processing in step S109, the processing from step S101 is executed also when the advertiser refers to the empty condition list and inputs in the condition column and transmits again.

On the other hand, if all the conditions have been input (YES in step S102), it is checked whether or not publication is possible (step S103), and if not, the fact is transmitted to the advertiser (YES in step S104). , Step S10
8). If the situation is permissible, a publication fee under the publication conditions is calculated and transmitted to the advertiser (step S10
5).

If the advertiser sees the returned fee and is OK, he clicks the "OK" display (see FIG. 6). This click signal is notified to the host station server 1, and at the same time, the advertisement content and the posting conditions are also transmitted to the host station server 1.

When the "charge determination" is notified, the host station server 1 executes a charge determination input process shown in FIG.

First, the publishing conditions and advertisement contents are input to the host computer and stored (step S20).
1) Record the publishing conditions in the advertisement publishing management table (step S202). The recorded contents are stored in the above-mentioned steps S103, 1
It is used for the judgment at 06.

Next, the advertisement content and the posting condition are transmitted to the corresponding terminal station server 2 based on the posting condition.
For example, the corresponding terminal station server 2 is determined and transmitted based on the type of vehicle and the condition of the section (step S20).
3). In the first embodiment, the data is directly transmitted from the host station server 1 to the corresponding display terminal 3.

It should be noted that the host station server 1 can perform various processes other than the above-described processes or modifications thereof.

For example, advertisement contents to be posted for each month may be stored, and in step S203, the next month's worth of the next month may be collectively transmitted to the corresponding terminal station server 2.

The advertisement insertion management table is stored in each terminal station server 2.
May be stored. In this case, the host station server 1
Means that each terminal station server 2 is inquired as to whether or not it is possible to publish in response to the publishing conditions transmitted from the advertiser. If such processing is performed, it is possible to cope with the case where a plurality of advertisement receiving servers are installed.

Further, the host station server 1 may add the ID of the terminal station server 2 corresponding to the advertising content and transmit it to each terminal station server 2. In this case, the terminal station server 2 only has to selectively receive the transmitted advertising content with its own ID, and the host station server 1 selects the corresponding terminal station server 2 in advance and transmits it. Steps to perform can be omitted.

(Electronic conference system, see FIG. 10) FIG.
Denotes an information display system according to the third embodiment, which is configured as an electronic conference system, and is hereinafter referred to as an electronic conference system. This system generally includes a large display device 50 for presentation, an electronic document server 52 functioning as a host device, and a plurality of display terminals 60.

The large display device 50 includes an operation / drive unit 51 and is controlled by an electronic document server 52.
The server 52 includes a communication module 53, and transmits electronic document information, which is a conference material, to each display terminal 60 by wireless or the like.

The display terminal 60 includes a liquid crystal display panel 61 having a touch panel on its surface and an operation unit 62.
2 is displayed on the display panel 61. Basically, the same screen is displayed on the large-sized display device 50 and each display terminal 60. However, in each display terminal 60, a participant can display an arbitrary screen by an operation such as page turning. You can also.

FIG. 11 shows a first example of a control unit of the display terminal 60, which is constituted mainly by a CPU 71. In addition to a liquid crystal display panel 61 and an operation unit 62, a communication unit 72, an image memory 73, a power supply 74, a power supply A control unit 75 and the like are provided.
The data transmitted from the server 52 is stored in the image memory 73 and displayed on the display panel 61 one screen at a time. The power supply 74 supplies power to each circuit portion of the control unit, and is controlled by the power supply control unit 75 and detects the remaining power.

The liquid crystal display panel 61 is formed of a display medium having a memory property, for example, a chiral nematic liquid crystal obtained by adding a chiral material to a nematic liquid crystal, a ferroelectric liquid crystal, or the like. If a display medium with memory properties is used,
Once the display is performed, the display is maintained even if the power to the display panel 61 is cut off, contributing to energy saving.

FIG. 12 shows a second example of the control unit of the display terminal 60, in which a communication unit 72 'is provided independently. The other configuration is the same as that of the control unit shown in FIG. The communication unit 72 'is fixed to a predetermined place in the conference room.
By setting the display terminal 60 in 2 ′, the display terminal 60
Will be incorporated into the electronic conference system.

The conference participant has a mode of browsing a document in accordance with a display instruction of electronic document information transmitted sequentially or collectively as a display schedule from the server 52, and has presentation history information of already announced materials and electronic document. According to the hyperlink information and the page moving command of the display software, a mode in which the conference participant can freely view the electronic document can be selected.

(Erase display, see FIGS. 13 to 18) In the electronic conference system, when a predetermined condition occurs, the display of the display terminal is erased and at the same time, the transmitted data is also erased from the image memory 73. . Such processing is performed when the transmission information is information that the conference organizer wants to keep secret. In the following description, "display deletion" means that data itself is also deleted.

The display erasing process is performed, for example, when a deletion instruction is transmitted from the server 52, when a predetermined time has elapsed from the data transmission, or when a predetermined time has elapsed, when the display terminal 60
Is disconnected from the communication unit 72 ′ (see FIG. 12), when the power of the display terminal 60 is cut off, or when the power supply
4 is executed when the remaining power is low. Less than,
The procedure of the first to fifth erasing processes will be described.

(First erasing process, see FIG. 13) In the first erasing process, erasing is performed based on an instruction from the server 52. That is, when determining that it is the timing of the erasing process, the operator inputs an erasing instruction to the server 52. Then, in the transmission process of the server 52, as shown in FIG. 13A, it is determined in step S1 whether the transmission information is display data or an erasure instruction. If it is display data, step S2
Transmits the display data to each display terminal 60. On the other hand, if it is an erasure instruction, the erasure instruction is sent to each display terminal 6 in step S3.
Send to 0.

In each display terminal 60, FIG.
As shown in the flowchart of FIG.
To determine whether the received information is display data or an erasure instruction. If it is display data, the display on the display panel 61 is updated in step S6. On the other hand, if it is a deletion instruction, the display is deleted in step S7.

(Second erasing process, see FIG. 14) In the second erasing process, the erasing is performed when a predetermined time or a predetermined time has elapsed since the data was transmitted from the server 52. When the display data requires “secret”, the operator transmits the data from the server 52 when the display data shown in FIG.
As shown in (1), in step S11, "secrecy" is input, and a time or time to be deleted is input. The time or time entered here will generally match the scheduled end of the meeting.

Next, the display data is transmitted to each display terminal 60 in step S12. Thereafter, if it is determined in step S13 that the display data is "secret", the process proceeds to step S14.
To set the time or time on the timer. If the data does not require “secret”, the above-described step S1
1, S14 is not executed.

The timer interrupt processing in the server 52 is executed when an interrupt is generated when the timer set in step S14 has finished counting the set time or when the set time has come. You.
That is, as shown in FIG. 14B, an erasing instruction is transmitted to each display terminal 60 in step S17. The processing in the display terminal 60 that has received the erasure instruction is the same as that in FIG. 13B, and the display is erased by executing the step S7.

(Third erasing process, see FIGS. 15 and 16) In the third erasing process, the erasing is set to a relatively short time and can be extended as appropriate. Perform erasure after hours.

That is, as shown in FIG. 15A, in step S21, the user inputs "secret" and inputs the time or time to be erased. Next, in step S22, the fact that the display data is secret is attached to the display data, and the display data is transmitted to each display terminal 60 in step S23.

Thereafter, if it is determined in step S24 that the display data is "secret", the timer T1 is started in step S25. The timer T1 is set to, for example, one minute.

The timer interrupt process is executed by generating an interrupt when the timer T1 has finished counting the set time. That is, as shown in FIG.
If it is determined in step S27 that the time or time input in step S21 has not elapsed, the process proceeds to step S2.
At 8, the display extension signal is transmitted to each display terminal 60, and at step S29, the timer T1 is restarted.

In each display terminal 60, FIG.
As shown in the figure, in the receiving routine, first, in step S3
In step 1, it is determined whether the received information is display data or an erasure extension signal. If it is display data, the display panel 6 is displayed in step S32.
Update the display of 1. If it is determined in step S33 that the display data is "secret", the timer T2 is started in step S34. The timer T2 is set to a longer time than the timer T1. For example, timer T
If one is one minute, timer T2 is set to ten minutes. If the determination in step S31 is an erasure extension signal, the timer T2 is restarted in step S35.

The timer interrupt process in the display terminal 60 is executed by generating an interrupt when the timer T2 has finished counting the set time. That is, FIG.
As shown in (5), the display is deleted in step S37.

That is, in the third erasing process, a display extension signal is normally issued each time the timer T1 counts up, and the timer T2 repeats restart. When the set time elapses or exceeds the set time (for example, the end of the conference), the display extension signal is not transmitted, and after that, when the set time (10 minutes) of the timer T2 elapses, the display is continued. Even if the display is left on the terminal 60, the display is automatically deleted. If the display terminal 60 is taken out of the conference hall during the conference, the server 52
Is interrupted, and the display is deleted after the set time of the timer T2.

(Fourth erasing process, see FIG. 17) In the fourth erasing process, the erasing timing is managed in each display terminal 60, and the erasing is executed when a predetermined time or time has elapsed. Therefore, in this fourth erasing process, the server 52
Processing load is reduced.

More specifically, as shown in FIG.
In step S41, the user inputs "secret" and
Enter the time or time to erase. Next, step S
At 42, the fact that the display data is secret and the set time or time are attached to the display data, and the display data is transmitted to each display terminal 60 at step S43.

In each display terminal 60, FIG.
As shown in the figure, in the reception routine, first, in step S4
In step 5, the display on the display panel 61 is updated. If it is determined in step S46 that the display data is "secret",
In step S47, the time or time is set in the timer based on the time or time sent together with the display data.

The timer interrupt process in the display terminal 60 is executed when the timer set in step S47 has finished counting the set time or when the set time has come, an interrupt occurs. Is done. That is,
As shown in FIG. 17C, the display is deleted in step S49.

(Fifth erasing process, see FIG. 18)
In the erasing process, when the predetermined display continuation condition is not satisfied, the display is erased. Here, the predetermined display continuation condition is that the display terminal 60 is connected to the communication unit 72 ′ (see FIG. 12), the power of the display terminal 60 is not cut off, or the power of the power supply unit 74 is required. That is the amount left. Of course, other display continuation conditions may be set.

That is, as shown in FIG.
If it is determined in step 1 that the predetermined display continuation condition has become inconsistent, in other words, if any of the erasure conditions has occurred, the display data is determined to be "secret" in step S52, and the display data is displayed in step S53. To delete.

Since the liquid crystal display panel 61 of the display terminal 60 has a memory property, once the display is performed, the display is maintained even if the power supply is stopped, and there is a possibility that the secret information is displayed as it is. . Therefore, the display is erased when the power is cut off or the remaining power is low. Also, the display terminal 60 separated from the communication unit 72 'may be taken out of the display terminal 60, so that the display is similarly erased.

(Display Erase Operation) Here, the display is erased by
This may be performed by overwriting predetermined image data (for example, data for making all pixels black) in the image memory 73 and updating the display. Alternatively, as described below, display erase drive control different from that for display may be performed.

That is, the liquid crystal display panel 61 normally resets the liquid crystal by applying a predetermined pulse signal from a plurality of scanning electrodes and a plurality of signal electrodes which are opposed to each other in a state orthogonal to each other with the liquid crystal layer interposed therebetween. (Write). In such a liquid crystal display panel 61, first, at the time of display, a reset pulse signal is applied to all the scanning electrodes to reset all the pixels once. After that, the scanning electrodes are sequentially selected, and a pulse signal corresponding to the display data is applied to the signal electrodes at the same timing as the selection while applying the selection pulse signal. Rewriting of all pixels is performed by sequentially shifting the scanning electrodes to which the selection pulse signal is applied.

On the other hand, at the time of erasing, a reset pulse signal is applied to all the scanning electrodes to reset all the pixels once. Thereafter, all the scanning electrodes are simultaneously selected and a selection pulse signal is applied, and at the same time, a predetermined pulse signal (0 for erasing black) is applied to all the signal electrodes.
V).

(Other Embodiments) The information display system and the display terminal according to the present invention are not limited to the above embodiments, but can be variously modified within the scope of the invention.

In particular, the configurations of the host station server, terminal station server, electronic document server, and display terminal are arbitrary. Also,
The place of installation and the grouping of display terminals are also arbitrary. Also, the content to be displayed may be other than advertisements and meeting materials, and can be managed together with these contents.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an information display system according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram showing an information display system according to a second embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating an example of installation of a display terminal.

FIG. 4 is an explanatory diagram showing a personal computer screen (advertisement system contract / setting screen) accessing a host station server.

FIG. 5 is an explanatory diagram showing a screen (reservation status screen) of a personal computer accessing a host station server.

FIG. 6 is an explanatory diagram showing a screen (posting condition determination screen) of a personal computer accessing a host station server.

FIG. 7 is an explanatory view showing a screen (advertisement content setting screen) of the personal computer accessing the host station server.

FIG. 8 is a flowchart showing a processing procedure at the time of reception in the host station server.

FIG. 9 is a flowchart showing a processing procedure at the time of inputting a fee determination in the host station server.

FIG. 10 is a schematic configuration diagram showing an information display system (electronic conference system) according to a third embodiment of the present invention.

FIG. 11 is a block diagram showing a first example of a control unit of the display terminal.

FIG. 12 is a block diagram showing a second example of the control unit of the display terminal.

FIGS. 13A and 13B are flowcharts showing a control procedure of a first erasing process, wherein FIG. 13A shows a transmitting process in a server, and FIG. 13B shows a receiving process in a terminal.

FIGS. 14A and 14B are flowcharts showing a control procedure of a second erasing process, wherein FIG. 14A shows a transmission process in a server, and FIG. 14B shows an interrupt process in the server.

FIGS. 15A and 15B are flowcharts showing a control procedure of a third erasing process, in which FIG. 15A shows a transmission process in a server, and FIG. 15B shows an interrupt process in the server.

16A and 16B are flowcharts showing a control procedure of a third erasing process, wherein FIG. 16A shows a receiving process in a terminal, and FIG. 16B shows an interrupt process in a terminal.

FIG. 17 is a flowchart showing a control procedure of a fourth erasing process, wherein (A) shows a transmitting process in a server, (B) shows a receiving process in a terminal, and (C) shows an interrupting process in a terminal. .

FIG. 18 is a flowchart showing a control procedure of a fifth erasing process.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Host station server 2 ... Terminal station server 3 ... Display terminal 11 ... CPU 52 ... Electronic document server 60 ... Display terminal 61 ... Liquid crystal display panel 71 ... CPU 72 ... Communication part 73 ... Image memory 74 ... Power supply

Continued on the front page (72) Inventor Katsuhiko Asai 2-3-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka Inside Osaka International Building Minolta Co., Ltd. (72) Inventor Masaaki Nakai 2-3-3 Azuchicho, Chuo-ku, Osaka-shi, Osaka No. 13 Osaka International Building Minolta Co., Ltd. (72) Koichi Koriyama 2-13-13 Azuchicho, Chuo-ku, Osaka City, Osaka Prefecture Osaka International Building Minolta Co., Ltd. (72) Inventor Kazuaki Okumura Osaka, Osaka 2-13-13 Azuchicho, Chuo-ku, Osaka Osaka International Building Minolta Co., Ltd. F-term (reference) 5B069 AA01 CA05 FA01 KA04 5B075 KK13 KK34 KK44 KK50 PQ02 UU06 5B085 BE07 CA04 CA07 CC17

Claims (16)

[Claims] 1. A host station server for storing a plurality of pieces of information, and a display terminal for receiving and displaying the information, wherein the host station is adapted to display the information displayed on the display terminal when the posting condition becomes incompatible. An information display system, wherein the information is deleted based on an instruction from a server. 2. A host station server for storing a plurality of information, a terminal station server for receiving information from the host station server, and a display terminal for receiving and displaying information from the terminal station server. And deleting the displayed information on the basis of an instruction from the terminal station server when the posting condition becomes inappropriate. 3. The information display system according to claim 1, wherein the information stored in the host station server is advertisement information. 4. The information display system according to claim 1, wherein the publication condition is a publication period. 5. The information display system according to claim 1, wherein said posting condition is a condition previously contracted between a publisher and a system administrator. 6. For a display terminal from which information has been deleted,
6. The information display system according to claim 1, wherein another information is displayed. 7. A server comprising: a server for transmitting information; and a display terminal for receiving and displaying the information transmitted from the server, wherein when a predetermined condition occurs, the display of the display terminal is deleted. Display system. 8. The information display system according to claim 7, wherein the display information on the display terminal is erased when a predetermined condition occurs, and the reception information stored in the memory of the display terminal is erased at the same time. 9. The predetermined condition includes an instruction from a server,
Claims: At least one of elapse of a predetermined time, elapse of a predetermined time, separation of the display terminal from the communication unit, power-off of the display terminal, or when the remaining power of the display terminal is reduced. The information display system according to claim 7 or 8. 10. The server according to claim 7, wherein the server attaches, to the display information, data for identifying that the information to be transmitted is a target for erasing the display when a predetermined condition occurs, and transmits the data to the display terminal. The information display system according to claim 8 or claim 9. 11. The information display system according to claim 10, wherein, when the identification information is attached to the transmitted information, the display terminal deletes the display when the predetermined condition occurs. 12. The information display system according to claim 7, wherein said display terminal comprises a display medium having a memory property. 13. Receiving information transmitted from a server,
A display terminal for displaying the reception information, wherein the display is deleted based on a deletion instruction transmitted from the server. 14. Receiving information transmitted from the server,
A display terminal for displaying the received information, wherein the display is deleted when a predetermined display continuation condition is not satisfied. 15. Receiving information transmitted from the server,
A display terminal for displaying the received information, comprising: means for automatically deleting the display under predetermined conditions, wherein the automatic deletion is prohibited or extended based on an instruction transmitted from the server. Terminal. 16. A display unit for displaying information, first display control means for displaying on the display unit based on received display data, and second display control means for erasing the display on the display unit. The display terminal according to claim 13, wherein the display terminal comprises: