JP2001042847A - Information processing system, display control method and storage medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make realizable a function that displays screens desired by each of people with a cost that is lower than the cost of plural notebook type computers. SOLUTION: A host computer has a frame buffer 9, which stores data for plural screen displays, and a graphic controller 8 which adds identification screen IDs to the data in the buffer 9 for display terminals 12 to 14 to successively output one screen at a time. Each of the terminals 12 to 14 has a graphic controller, which checks the IDs of the data transmitted from the host computer and displays the data if it is required, and a frame buffer which stores the data that are required.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information processing system, a display control method, and a storage medium, and more particularly, to a handwritten memo and the like, in which a plurality of listeners can easily see a screen for explanation at a business negotiation or the like. The present invention relates to an information processing system, a display control method, and a storage medium capable of inputting information of the same.

[0002]

2. Description of the Related Art Conventionally, when it is desired to give an explanation to a plurality of people at a place such as a business talk or a meeting, a whiteboard, an overhead projector (OHP), or the like has been used.
On the listener's side, the character that the presenter draws on the whiteboard, O
While listening to the image projected on the HP, I heard the story of the explainer. However, when a whiteboard is used, the area of the whiteboard is limited (small for drawing a complicated picture) and time constraints (explainer takes a long time to draw a complicated picture on the spot. If you want to show a picture, it takes time as well.) When using OHP, it is necessary to darken the room to ensure visibility,
The listener was dark and difficult to take notes, making it very inconvenient. In recent years, computer screens can be projected on a large screen or displayed on a large television for explanation, and the drawbacks of whiteboards and OHPs are being overcome.

[0003]

However, the above-mentioned prior art has the following problems. That is, when a computer screen is to be viewed by a plurality of people, the use of a large display such as a large screen or a large television as described above requires a large area because the display itself is large. There is also a restriction that a plurality of people must look at one display screen. For example, if one of the pages used to explain a page you want to see again and the presenter views the previous page that you requested,
Other people can only see the same screen. Since there are individual differences in the screens that one wants to see, there is a display device that can be individually referred to by each individual.

Such a function can be realized by distributing one notebook computer to each listener, connecting the computers to a local area network (LAN), and executing appropriate application software.
However, this method requires a complicated and expensive notebook computer for each person, and thus has a disadvantage that the whole system becomes very expensive.

[0005] The present invention has been made in view of the above points, and an information processing system capable of realizing a function of displaying a screen desired by each person at a lower cost than using a plurality of notebook computers. , A display control method, and a storage medium.

[0006]

According to one aspect of the present invention, there is provided an information processing system in which a plurality of display terminals and an information processing apparatus for managing each of the display terminals are communicably connected. Wherein the information processing apparatus includes a device-side storage unit that stores a plurality of screen display data, and a screen ID for screen identification added to the plurality of screen display data of the device-side storage unit for the display terminal. Output control means for sequentially feeding out and outputting one screen at a time, wherein each of the display terminals stores terminal display data determined to be necessary, and a screen display transmitted from the information processing apparatus. Display control means for displaying the screen display data determined to be necessary by checking the screen ID of the data.

In order to achieve the above object, according to a second aspect of the present invention, a screen to be displayed on each of the display terminals from the information processing device is specified from the device side input means of the information processing device. It is possible to specify a screen to be displayed on each of the display terminals from the terminal-side input means of each of the display terminals, and in the information processing device, It is characterized by receiving and managing information indicating which screen each display terminal is displaying.

According to a third aspect of the present invention, the information processing apparatus further comprises: a device-side communication unit that performs data communication with the display terminal; and a device-side display unit that performs display. Device-side input means for inputting commands and messages, and device-side temporary storage means for temporarily storing data,
Device-side fixed storage means for storing programs and data;
Device-side control means for performing program execution and calculation,
Each of the display terminals further includes a terminal-side communication unit that performs data communication with the information processing apparatus, a terminal-side display unit that performs display, a terminal-side input unit that inputs an instruction or a message, and a terminal that temporarily stores data. Side temporary storage means, a terminal-side fixed storage means for storing programs and data, and a terminal-side control means for executing programs and calculations, the output control means of the information processing device, the output control means of the information processing device The device-side display means, having a plurality of output ports for outputting to the display terminal, a one-way transmission line for outputting the screen display data from the information processing device to the display terminal, A bidirectional transmission path is provided for transmitting data other than the screen display data to the display terminal and for transmitting data from the display terminal to the information processing device.

In order to achieve the above object, according to the present invention, the display terminals are connected in a daisy chain to the information processing apparatus in a chain.
Each of the display terminals sequentially transfers the screen display data to the next display terminal.

In order to achieve the above object, according to a fifth aspect of the present invention, each of the display terminals is directly connected to the information processing device, and the information processing device connects the display terminals to each other. It is characterized by having display terminal connection means for connection.

[0011] In order to achieve the above object, the present invention according to claim 6 is a display control applied to an information processing system in which a plurality of display terminals and an information processing device for managing each of the display terminals are communicably connected. The information processing apparatus, wherein the information processing apparatus stores a plurality of screen display data in a device-side storage unit, and screen identification is performed on the plurality of screen display data in the device-side storage step with respect to the display terminal. A terminal-side storage step of storing screen display data determined to be necessary in a terminal-side storage means, the output control step including sequentially adding and outputting a screen ID for each screen and outputting the screen one by one. A display control step of checking a screen ID of the screen display data transmitted from the information processing apparatus and displaying the screen display data determined to be necessary.

In order to achieve the above object, according to a seventh aspect of the present invention, in the information processing apparatus, it is possible to designate a screen to be displayed on each of the display terminals from the information processing apparatus. In each of the display terminals, it is possible to specify a screen to be displayed on each of the display terminals, and in the information processing device, information indicating which screen each of the display terminals is displaying from each of the display terminals And receive and manage them.

In order to achieve the above object, according to the present invention as set forth in claim 8, the information processing device further includes a device-side communication step of performing data communication with the display terminal, and a display on the device-side display means. A device-side display step, a device-side input step of inputting an instruction or a message via the device-side input means, a device-side temporary storage step of temporarily storing data in the device-side temporary storage means, and a program or data fixed to the device side A device-side fixed storage step of storing in a storage means, and a device-side control step of executing a program or an arithmetic operation, wherein each of the display terminals further performs a terminal-side communication step of performing data communication with the information processing device; A terminal-side display step of displaying on the terminal-side display means, a terminal-side input step of inputting an instruction or a message via the terminal-side input means, A terminal-side temporary storage step of temporarily storing in a storage unit, a terminal-side fixed storage step of storing a program or data in a terminal-side fixed storage unit, and a terminal-side control step of executing a program or performing an operation. In the output control step of the device, the device-side display means of the information processing device, output to the display terminal via a plurality of output ports, from the information processing device to the display terminal via a one-way transmission path Outputting the screen display data, transmitting data other than the screen display data from the information processing apparatus to the display terminal via a bidirectional transmission path, and transmitting the data from the display terminal to the information processing apparatus via the bidirectional transmission path. And transmitting the data.

In order to achieve the above object, according to a ninth aspect of the present invention, the display terminals are connected to the information processing device in a daisy chain in a chain.
Each of the display terminals sequentially transfers the screen display data to the next display terminal.

In order to achieve the above object, according to a tenth aspect of the present invention, each of the display terminals is directly connected to the information processing device, and the information processing device is
The display terminals are connected via display terminal connection means.

In order to achieve the above object, according to the present invention, a display control applied to an information processing system in which a plurality of display terminals and an information processing device for managing each of the display terminals are communicably connected. A computer-readable storage medium storing a program for executing the method, the display control method comprising: a device-side storing step of storing a plurality of screen display data; and a device-side storing step for the display terminal. An output control step of adding a screen ID for screen identification to the plurality of screen display data and sequentially outputting one screen at a time; a terminal-side storing step of storing screen display data determined to be necessary; A display control step of checking the screen ID of the screen display data transmitted from the server and displaying the screen display data determined to be necessary. The features.

[0017]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 2 shows a first embodiment of the present invention.
It is an outline view showing an outline of an information processing system concerning an embodiment. The information processing system according to the first embodiment of the present invention includes a host computer 1, a display terminal 12, a display terminal 13, and a display terminal 14. FIG.
Is an example, and is not limited to the illustrated configuration.

The above configuration will be described in detail. The host computer 1 is used by an explainer at a business negotiation, for example.
Controls the entire information processing system. In this example, a notebook computer is used as an example. Material data and the like used for description are stored in the host computer 1.
The display terminals 12, 13, and 14 are for the listener to refer to the display screen while holding it at hand. Each display terminal 12 ~
14 are connected in a daisy chain format as shown in the figure. Each of the display terminals 12 to 14 is supplied with power from the host computer 1 through a cable.

In this example, it is generally assumed that there are a plurality of screens used by the presenter for explanation, and as shown in FIG.
The figure shows that three types of screens G2 and G3 are displayed on the respective display screens of the display terminals 12 to 14.
The G1 screen is commonly displayed on the host computer 1 and the display terminal 12, and different screens G2 and G3 are displayed on the other display terminals 13 and 14 according to a request instruction from a listener. Which screen the listener wants to see can be indicated by keys provided on the display terminal. When the listener wants to write a memo on the display screen, the user can write on the display screen through a touch screen provided on the display screen of the display terminal using an attached pen.

FIG. 1 is a block diagram showing a configuration example of an information processing system including a host computer and a display terminal according to the first embodiment of the present invention. The information processing system according to the first embodiment of the present invention includes a host computer 1, a host display device 11, a plurality of display terminals 12,
3 and 14 are connected. Further, the host computer 1 includes a CPU 2, a RAM 3, a ROM 4, an input device 5, a secondary storage device 6, an I / O controller 7, a graphic controller 8, a frame buffer 9, and a power supply device 10. It should be noted that the configuration shown in FIG. 1 is an example and is not limited to the illustrated configuration.

In detail, the host computer 1 serves as a host of the information processing system. In this example, unlike the above-described FIG. It shall be connected to the outside. In the host computer 1, a CPU
Reference numeral 2 denotes a central processing unit for performing calculations, which will be described later with reference to FIG.
The processing shown in the flowchart of FIG. RAM3 is
It is used to store programs and as a calculation area of the CPU 2. The ROM 4 stores programs, data, and the like. The input device 5 includes a keyboard, a mouse, and the like. The secondary storage device 6 is composed of a hard disk or the like that stores program files and data files. The I / O controller 7 receives an input from the input device 5, controls input / output with the secondary storage device 6,
It performs data input / output control with the display terminals 12 to 14.

The graphic controller 8 comprises a host display device 11 of the host computer 1 and display terminals 12 to
14, and has two display data output ports to the host display device 11 and the display terminals 12 to 14 as shown in the figure. Frame buffer 9
Is connected to the graphic controller 8 and is used as a work area for storing display screen data and performing display calculations. Graphic controller 8
Reads out display data from the frame buffer 9 and outputs it to the host display device 11 and the display terminals 12 to 14. The power supply 10 is built in the host computer 1 and supplies power to the inside of the host computer 1 and to the display terminals 12 to 14.

The host display device 11 displays a screen for a host computer. A presenter who provides an explanation to a plurality of persons at a place such as a negotiation or a meeting using the information processing system operates while looking at the screen of the host display device 11 or gives an explanation to a listener. In a notebook computer as shown in FIG.
(Liquid Crystal Display) corresponds to the host display device 11. For a computer without a built-in display device, an external display device such as a CRT or an LCD monitor corresponds to this. The display terminals 12, 13, and 14 are held by the listener, and the user can listen to the explanation while viewing the displayed screen. In addition, key input, pen input, and the like can be performed as needed.

In the figure, reference numeral 15 denotes a transmission line for transmitting display data from the host computer 1 to the host display device 11. Reference numeral 16 denotes the display terminals 12 to 1 from the host computer 1.
4 is a transmission line for transmitting the display data to 4. This is a one-way data transmission line from the host computer 1 to the display terminals 12 to 14. Reference numeral 17 denotes a bidirectional transmission line for exchanging data between the host computer 1 and the display terminals 12 to 14. The data handled here are the display terminals 12-1.
4 is input. Information indicating which screen the display terminals 12 to 14 are currently displaying, data written on the screens of the display terminals 12 to 14, the host computer 1
Is a relatively small amount of information such as a command such as "what number screen is to be displayed" sent to the display terminals 12 to 14 from.

Reference numeral 18 denotes a power cable for supplying power from the host computer 1 to the display terminals 12 to 14. still,
The transmission lines 16, 17, and 18 are bundled and used as one cable. A transmission line 19 transmits the same display data as the transmission line 16. Reference numeral 20 denotes a bidirectional transmission line similar to the transmission line 17. Reference numeral 21 denotes a power cable for supplying the same power as the power cable 18. This is power supplied from the host computer 1 and has no function of supplying power to the display terminals 12 to 14 themselves. Each transmission line 19, 2
Bundles 0 and 21 are used as one cable. 2
2, 23, and 24 are transmission lines similar to the transmission lines 19, 20, and 21, respectively.

In the present embodiment, the display data is displayed on the display terminal NO. 1 to the display terminal NO. 2, the display terminal NO. 2 to the display terminal NO. 3 and so on. The same display data received from the host computer 1 is transferred to the next display terminal as it is. In the present embodiment, since the display data is transmitted as digital data, it is transferred to the next display terminal through the buffer circuit. The reason is that if the input terminal and the output terminal of the display terminal are directly connected without passing through the buffer circuit, the signal waveform becomes dull and normal data transmission cannot be performed after the next stage.

FIG. 3 is a block diagram showing a configuration of a graphic controller peripheral circuit built in the host computer 1 of the information processing system according to the first embodiment of the present invention. The graphic controller peripheral circuit according to the first embodiment of the present invention includes a graphic controller main body 30, a display data output port (0) 32, and a display data output port (1) 33. In the figure, 11 is a host display device, 31 is a frame buffer, and 34 is a system bus. The graphic controller body 3
Peripheral circuits including “0” correspond to the graphic controller 8 in FIG. 1, and the frame buffer 31 corresponds to the frame buffer 9 in FIG.

The graphic controller main body 30 is connected to the system bus 34 of the host computer 1 and writes / reads display data to / from the frame buffer 31 and reads the display data from the frame buffer 31. The display data is output to the display data output ports 32 and 33. At this time, the display clock (dot clock) and the synchronization signal (Vs) are synchronized with the timing of the host display device 11 and the display terminals 12 to 14.
output (sync, Hsync) and display data. Also,
The feature of this embodiment is that it has two display data output ports. One is for the host display device 11 of the host computer 1, and the other is for the display terminals 12-14.

The frame buffer 31 is a memory device that stores display data to be displayed on a screen. FIG. 4 shows a memory address map in the frame buffer 31. 4 will be described later. Host display device 11
1 is a display device of the host computer 1, and FIG.
It is the same as 11. Display data output port (0)
32 is connected to the host display device 11. The display data output port (1) 33 is connected to the display terminals 12 to 14. The system bus 34 is connected to the host computer 1
It is equipped within.

FIG. 4 is an explanatory diagram showing a memory address map in the frame buffer of the host computer 1 of the information processing system according to the first embodiment of the present invention. Address 0, address 1,..., Address n are the head addresses of the respective areas in which the display screen data is stored. The area from address 0 to address 1-1 is the host computer (host PC) display display screen area, which stores the screen data to be displayed on the host display device 11 in FIG. Screen data that the speaker displays on the display terminal and is used for explanation is divided and stored for each screen in the area of address 1 or more.

The area from address 1 to (address 2-1) is the display screen 1, the area from address 2 to (address 3-1) is the display screen 2, and the following is repeated up to the display screen n. An off-screen area (non-display area) not used for display is secured. The non-display area is used as a work area for the graphic controller 30 to perform calculations for display preparation. In this embodiment, it is assumed that display screen data corresponding to the screen resolution of the display terminal is prepared for a plurality of screens.

The graphic controller 30 reads the display data from the frame buffer 31 mapped as described above and outputs the display data to the output port. For the host display device 11, the display data is sequentially read from the display screen area of the host PC display in synchronization with the screen refresh cycle of the host display device 11, and output to the display data output port (0) 32 in FIG. On the other hand, the display terminals 12 to 14 sequentially read and output the display data of the display screens 1 to n to the display data output port (1) 33 in FIG. Note that display screens 1 to n can be selected as data to be displayed on the host display device 11. Instead of reading the data to be output to the display data output port from the display screen area of the host PC display, the display data may be read from the head address of the display screen data to be output.

The host display device 11 and the display terminals 12 to 14
The display data output to the host device operates in parallel, and when viewed from the user, the screen of the host display device 11 is also displayed on the display terminals 12 to 12.
The screen 14 is always displayed normally. The memory address map shown in FIG. 4 may be arranged such that an off-screen area is provided for each display screen as shown in FIG.

FIG. 8 is a block diagram showing a configuration example of the display terminal 41 of the information processing system according to the first embodiment of the present invention. The display terminal 41 of the information processing system according to the first embodiment of the present invention includes a graphic controller 4
2, frame buffer 43, display device 44, control unit 4
5, RAM 46, ROM 47, communication interface 4
8, a key input device 49, a point input device 50, and a power supply device 51. The display terminal 41 corresponds to the display terminals 12 to 14 in FIG. Note that the configuration illustrated in FIG. 8 is an example, and the configuration is not limited to the illustrated configuration.

In detail, the graphic controller 42 controls the display on the display terminal 41, reads out the display data stored in the frame buffer 43, and sequentially outputs it to the display device 44. Screen display. The frame buffer 43 is a memory device that stores display data to be displayed on a screen. In the display terminal 41, unlike the host computer 1,
The frame buffer 43 stores only display data for one screen. The frame buffer 43 only has display data for one screen and an off-screen area. Therefore, to display a different screen, it is necessary to newly write display data to the frame buffer 43.

Since the display device 44 is a small and lightweight device in which the display terminal 41 is near the listener, it is configured as a thin display device such as an LCD. The graphic controller 42 reads the display data from the frame buffer 43 and outputs the display data to the display device 44.
The control unit 45 receives an input from a point input device 50 such as a key input device 49 or a touch screen, transmits the input to the outside through the communication interface 48, or receives data input from the outside. Also, the display terminal compares the screen ID transmitted from the host computer 1 with the screen ID that the display terminal itself is trying to display, and determines which display data is to be captured. In addition, a process shown in a flowchart of FIG. The control unit 45 is configured by a microcontroller or the like.

The RAM 46 is used by the control unit 45 for calculations and data storage. The ROM 47 stores a program for the control unit 45, a program for the graphic controller 42, and data. The programs for the control unit 45 and the graphic controller 42 do not necessarily need to be stored in the same ROM. The ROM in which the program for the graphic controller 42 is stored may be configured to be directly connected to the graphic controller 42.

The communication interface 48 has an interface for receiving a screen ID and display data and transferring the screen ID and display data to the next display terminal, and a transmission path interface for bidirectionally exchanging data different from the display data. Further, the display data is transferred to the graphic controller 42 as necessary, and the bidirectional transmission path is connected to the control unit 45, or the control unit 45 is connected to the graphic controller 42. The two-way transmission line handles a small amount of data, such as input data from the key input device 49 or the point input device 50, and does not require a very large data transfer band, and a pin of an interface connecting the host computer 1 and the display device 44. Use serial communication transmission lines to reduce the number and number of signals.

The key input device 49 is used when the user of the display terminal 41 inputs a screen number or the like to be displayed. For example, assuming that ten keys are used as the key input device 49 and the screen ID can be indicated by a decimal page number, when the fourth page is to be displayed, the page number can be input by pressing the “4” key. The point input device 50 is an input device such as a touch screen, and is installed so as to overlap the display device 44 of the display terminal 41. The user can trace a point on the screen with a finger or touch the point information, handwritten characters, You can input pictures and handwritten figures. The input information can be stored in the RAM 46 and transmitted to the outside of the display terminal. The input information is displayed on the display device 4.
4 to the corresponding pixel location on frame buffer 4
If the information is written in 3, the information input from the point input device 50 can be superimposed and displayed on the display screen.
The power supply device 51 receives power supply from the outside through a power supply line, and supplies power to the inside of the display terminal.

As described above, the display data transmission line 52 includes DOT CLOCK, Vertical Sync, and H.
Synchronization signal such as horizontal sync and Vid
This is a one-way digital transmission path composed of an eoData data bus and having the host computer 1 on the output side. As described in the communication interface 48, the serial communication transmission line 53 is connected to the key input device 49 and the point input device 5
Handles a small amount of data such as input data from 0. Power line 54
Supplies the power of the display terminal 41 from the host computer 1. Display data transmission line 52, serial communication transmission line 5
3. The power supply lines 54 are bundled and handled as one cable. The transmission lines 55, 56 and 57 are connected to the display data transmission line 5
2. These correspond to the serial communication transmission line 53 and the power supply line 54, and are similarly bundled and handled as one cable.

FIG. 14 is an explanatory diagram showing a conceptual example in which the program and related data of the present invention are supplied to the apparatus from a storage medium. The program and related data of the present invention are stored in a storage medium 141 such as a floppy disk or a CD-ROM in the device 1.
The recording medium is supplied by being inserted into the storage medium drive insertion port 143 provided in the storage medium drive 42. Thereafter, the program and related data of the present invention are temporarily installed on the hard disk from the storage medium 141 and loaded into the RAM from the storage medium 141, or directly loaded into the RAM without being installed on the hard disk, thereby obtaining the program and the related data of the present invention. Can be executed.

In this case, when executing the program of the present invention in the information processing system according to the first embodiment of the present invention and a second embodiment to be described later, for example, a procedure as shown in FIG. By supplying the program and related data of the present invention to the host computer and the display terminal of the information processing system, or by storing the program and related data of the present invention in advance in the host computer and the display terminal of the information processing system, Program execution becomes possible.

FIG. 13 is an explanatory diagram showing a configuration example of the storage contents of a storage medium storing the program and related data of the present invention. The storage medium of the present invention is, for example, volume information 1
31, directory information 132, a program execution file 133, a program-related data file 134, and the like. The program of the present invention is program-coded based on the flowcharts shown in FIGS.

Each component in the claims of the present invention, the first embodiment of the present invention, and the second
Correspondence with each unit in the information processing system according to the embodiment is as follows. The output control means corresponds to the graphic controllers 8 and 68 of the host computer, the device-side storage means corresponds to the frame buffers 9 and 69 of the host computer, and the device-side communication means corresponds to the I / O controllers 7 and 67 of the host computer. The device-side display means is a host display device 1 of the host computer.
1, 71, the device-side input means corresponds to the input devices 5, 65 of the host computer, the device-side temporary storage means corresponds to the RAMs 3, 63 of the host computer, and the device-side fixed storage means corresponds to the ROM 4 of the host computer. , 64, and the device-side control means is the CPU of the host computer.
2, 62.

The display control means corresponds to the graphic controllers 42 and 102 of the display terminal, the terminal storage means corresponds to the frame buffers 43 and 103 of the display terminal, and the terminal communication means corresponds to the communication interface 48 of the display terminal. 108, the terminal-side display means corresponds to the display devices 44, 104 of the display terminal, and the terminal-side input means corresponds to the key input devices 49, 109, the point input device 5 of the display terminal.
0, 110, the terminal-side temporary storage means corresponds to the RAM 46, 106 of the display terminal, the terminal-side fixed storage means corresponds to the ROM 47, 107 of the display terminal, and the terminal-side control means corresponds to the control unit 45 of the display terminal. , 105.

The one-way transmission lines are transmission lines 16, 76,
79, 82, and the bidirectional transmission path is the bidirectional transmission line 1
7, 77, 80, and 83, and the display terminal connection means corresponds to the display data output ports 92 to 96.

Next, the first embodiment of the present invention configured as described above
The operation of the information processing system according to the embodiment will be described with reference to FIGS.
Each case of the processing of the display terminal will be described in detail.

First, details of the display data output operation to the display data output port (1) 33 of the host computer 1 of the information processing system according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. . This process is a process of reading and outputting data from the frame buffer 31 mapped to the address shown in FIG. 4 or 5 to the display data output port (1) 33.

Step S1 is the start of the process. Step S2 is an initialization operation of the internal counter. Here, the counter is set to K, and K = 1 is initialized. Step S
Reference numeral 3 denotes a screen ID creation process. In the present embodiment, the display terminals 12 to 14 identify a plurality of screen data repeatedly sent from the host computer 1 by a screen ID added to the head of the screen data, and
Only the display data with the screen ID set to be displayed in step 4 is received, and the display data with other IDs is ignored. This step S3 is a process of creating a screen ID required for the above operation. For example, the processing is such that the screen ID of the display screen 1 in FIG. 4 is “1” and the screen ID of the display screen 2 is “2”.

Step S4 is a process for outputting the screen ID created in step S3 before outputting the screen display data. In the present embodiment, the screen ID is output on the Video Data Bus that outputs display data during the vertical retrace interval. Detailed timing is shown in FIG. Step S5 is a process for determining a display start address indicating from which address in the frame buffer 31 data should be read before starting screen display. Specifically, the content of the display start address register in the graphic controller 30 is changed to the head address where the display screen data to be displayed is stored, that is, any one of address 1, address 2,... Address n in FIG. This is the processing to be performed. Since the K-th screen is now to be displayed, "address K" is written to the display start address register.

Step S6 refers to the display start address register changed in step S5, and starts reading display data from the corresponding address. After the data is read, the data is output to the display data output port, the data is read from the next address, and output to the display data output port. While repeating this operation, data for one screen is displayed. Step S7 is processing to increase the value of the counter K by one. In step S8, the magnitudes of K and n (the number of display screens) are compared to determine whether all display screens to be displayed have been displayed. If K> n, that is, if all display screens to be displayed have been displayed, the process proceeds to step S9, and the present process ends. If K is equal to or less than n, there is still a screen to be displayed, so the flow returns to step S3 to start the operation for displaying the next screen. Step S9 is the end of this process.

Since the present process can be implemented by hardware, the above steps S3 and S4 do not necessarily have to be performed in the same order as in the present process. That is, in step S3, all screens may be created when the number of display screens is determined, and may be stored in a register in the graphic controller 30, an off-screen area in the frame buffer 31, or the like. The order of step S4 and step S5 may be reversed. What is important is the order in which the screen ID is output before the display data for one screen is output.

FIG. 7 shows the output signal timing for the display data output port (1) 33. Output signal is screen ID
There is no particular difference from a known general display device except for the output of. DOT CLOCK is a clock for synchronizing data transfer per display pixel. In the present embodiment, data transfer is performed in synchronization with the falling edge of the clock. Vertical Sync is a vertical synchronization signal. This is a negative logic signal indicating the start of one-screen display. Ho
horizontal Sync is a horizontal synchronization signal. 1
This is a negative logic signal indicating the start of a horizontal line. Video
Data is a digital signal for outputting display data. For example, each of R (red), G (green), and B (blue) is 5-6-5.
Bits are assigned, and the gradation of each dye is indicated by a digital value. In this case, the data is 16-bit data.

As for the transfer timing of the display screen data, a Vertical Sync signal is first output to indicate the start of one screen. The display terminals 12 to 14 are Vertical
By detecting the falling edge or the low level of the Sync signal, the start of display is known. The graphic controller 30 of the host computer 1 has a Vertical Sy
After enabling nc, the screen I is displayed on the Video Data.
D “A” is output. After the Vertical Sync signal is activated and invalidated, the data output of the screen ID “A” is stopped. The display terminals 12 to 14 are Vertical
The rising edge of Sync is detected, and V at this time is detected.
Data "A" on video Data Bus is displayed on screen I
D, and it can be determined whether or not it is necessary to capture the display data transmitted thereafter.

After the screen ID is transmitted, it is the same as the screen data transfer of a general display device. Horizontal Syn
The signal c becomes valid to indicate the start of a horizontal line, and then one line of display data is sequentially output in synchronization with DOT CLOCK. When the display data for one line has been output, the display data for one line is output after the next Horizontal Sync signal becomes valid. This operation is repeated, and when the display data for one screen has been output, the next screen ID “B” is output in the same manner as before, and the screen display is continued in the same procedure. The above is the screen display operation on the host computer side.

Next, an operation process of receiving display data at the display terminal of the information processing system according to the first embodiment of the present invention will be described with reference to the flowchart of FIG. This process is started when the display terminal detects the falling edge of the Vertical Sync signal.

Step S20 is the start of the process. Step S21 is to read the screen ID. More specifically, as shown in FIG. 7, the rising edge of the Vertical Sync signal is detected, and Video Da at that time is detected.
The data on the Ta Bus is sampled and the screen ID is read. In step S22, it is determined whether the screen ID read in step S21 matches the screen ID to be displayed on the display terminal. The screen ID to be displayed on the display terminal is stored in the RAM 46 in FIG. The read screen ID is compared with the screen ID stored in the RAM 46. If they match, the process proceeds to step S23, and if not, the process proceeds to step S25 to end the process.

In step S23, the screen ID to be displayed (here, the same as the read screen ID) and the screen I of the display data stored in the frame buffer 43 of the display terminal are displayed.
It is determined whether D is the same. If they are the same, there is no need to take in the display data, so the process proceeds to step S25 and ends. If not the same, the process proceeds to step S24.
The screen ID to be displayed can be instructed from the host computer 1 to the display terminal via the serial communication transmission line, or the user who is using the display terminal at hand can use the key input device 49 or the point input device 50 to input the screen ID. It can be changed by instruction.

Immediately after the screen ID to be displayed is changed in this way, the screen ID to be displayed is different from the screen ID of the display data stored in the frame buffer 43 in the display terminal. The buffer 43 needs to be updated. A flag bit indicating that the screen ID to be displayed has been changed is prepared in the RAM 46, and if it has been changed, "1" is set.
When the display data of the screen to be displayed has been written, the flag bit is cleared to "0". In step S23, this flag bit is checked to make a determination. When the flag bit is “0”, the screen ID to be displayed and the screen I stored in the frame buffer 43
D is the same, and the frame buffer 4
There is no need to update the display data in 3.

Step S24 is a process for taking in display data for one screen and storing it in the frame buffer 43. After the storage is completed, the flag bit is cleared to "0". Step S25 is the end of the process.

If data for one screen cannot be written to the frame buffer 43 within the display period of one screen, the next data is fetched and written to the frame buffer 43 at the next display of a screen having the same screen ID. Good. If the writing speed to the frame buffer 43 is sufficiently high, or if the writing buffer in the communication interface is large enough to capture the screen data within one screen display period, the screen display is performed a plurality of times as described above. There is no need to divide into periods.

In this embodiment, the display data transmission path is described as transmitting digital data. However, the display data transmission path may be realized by analog RGB signals used in a known analog CRT. However, in that case, a DA converter for converting digital display data into an analog signal is required on the host computer side, and an AD converter for converting received analog data into digital display data is required on the display terminal side.

The display data is a data line corresponding to the gradation allocated to RGB, in the above example, RGB: 5-6.
The parallel transmission method requiring 16 bits of −5 bits has been described. However, in order to reduce the number of transmission signals, the parallel signals may be converted into high-speed serial signals and then output from the host computer and transmitted. Since the number of signals is smaller than that of the parallel transmission method, the transmission cable becomes thinner,
There is an effect that the transmission cable length can be made longer for serial transmission. However, in this case, a serial-parallel conversion device for returning data received in serial format to data in parallel format on the display terminal side is required.

When the screen displayed on the display terminal is switched from the host computer, first, the screen ID to be displayed is transmitted from the host computer to each display terminal using serial communication. The display terminal receives the screen ID to be displayed sent from the host computer,
Thereafter, by executing the processing shown in FIG. 9, the screen switching processing of the display terminal can be performed from the host computer.

Next, data transmission processing from the display terminal to the host computer in the information processing system according to the first embodiment of the present invention will be described.

First, the case where the screen ID is transmitted will be described. If the screen ID to be displayed stored in the display terminal is changed by key input or the like, the changed screen ID
To the host computer. The host computer stores the transmitted screen ID in the RAM 3 and can know which display terminal is currently displaying which screen.

Next, a case where data such as handwritten characters input from the user via the point input device 50 on the display terminal will be described. Data input from the point input device 50 is coordinate data on the point input device 50. The coordinate data is first stored in the RAM 46 in the display terminal.
Is stored within. By converting the coordinate data to the corresponding pixel position on the display screen and writing it to the frame buffer 43,
Handwritten data can be superimposed and displayed on the display screen. The stored coordinate data is transmitted to the host computer via the serial communication transmission path. The host computer stores the transmitted coordinate data in the RAM 3. The host computer can know which coordinate data has been input on which display terminal. If the coordinate data is converted into pixel positions on the screen and written into the frame buffer 9, the handwritten data can be superimposed and displayed on the screen.

With the configuration and control as described above, the presenter and the listener can proceed while talking while looking at the display screen, and the listener can individually call the screen that he / she wants to see and write a handwritten memo or the like. it can. The presenter can take the initiative to switch the display screen, and can know which display terminal is referring to which screen and what data has been written.

As described above, according to the information processing system according to the first embodiment of the present invention, the host computer comprises: a frame buffer 9 for storing a plurality of screen display data; A graphic controller 8 for adding a screen ID for identification to a plurality of screen display data and sequentially feeding and outputting one screen at a time
Each display terminal has a graphic controller 42 for checking the screen ID of the screen display data transmitted from the host computer and displaying the screen display data determined to be necessary, and stores the screen display data determined to be necessary. Since the display terminal has the frame buffer 43 and the display terminals are connected to the host computer in a daisy chain, the following operations and effects are obtained.

Conventionally, when it is desired to explain to a plurality of people at a place such as a business talk or a meeting, the limitation of the area of the whiteboard and the time restriction which existed when the whiteboard was used are eliminated. Since the room does not need to be darkened, the problem that the listener has difficulty in taking notes and taking notes can be solved.

When a computer screen is to be viewed by a plurality of persons, a large screen or a large-sized display such as a large-sized television requires a large area because the display itself is large. According to this, a large space is not required because each of the listeners can hold the display terminal at hand.

Further, conventionally, since a plurality of persons have to look at one display screen, there is a page that one person wants to see again among pages used for the explanation so far, and the explainer has requested. When the previous page is displayed, there is a drawback that other people can see only the same screen uniformly. However, according to the present invention, since the screen desired by each person can be displayed on the display terminal, it is very difficult. It is convenient.

It is considered that such a function can be realized by distributing one notebook computer to each listener, connecting the computers via a LAN, and executing appropriate application software. However, this method is complicated. However, there is a disadvantage that the whole system becomes very expensive because the number of expensive notebook computers required for the number of people is increased, but according to the present invention, the display terminal is much simpler than the notebook computer. Since it can be realized by the structure, there is an economic effect that a system that is less expensive than using a plurality of notebook computers can be realized.

[Second Embodiment] In the first embodiment of the present invention described above, the display terminal is connected in a daisy chain from the host computer in a chain.
In the second embodiment of the present invention, a form in which all display terminals are directly connected to a host computer, that is, a so-called star-type connection form is employed.

FIG. 10 is a block diagram showing a configuration example of an information processing system including a host computer and a display terminal according to the second embodiment of the present invention. The information processing system according to the second embodiment of the present invention includes a host computer 61, a host display device 71, a plurality of display terminals 72,
73 and 74 are connected. Further, the host computer 61 includes a CPU 62, a RAM 63, a ROM
64, an input device 65, a secondary storage device 66, an I / O controller 67, a graphic controller 68, a frame buffer 69, and a power supply device 70. Note that FIG.
Is an example, and is not limited to the illustrated configuration.

The above configuration will be described in detail. The CPU 62 of the host computer 61 to the I / O controller 67, the frame buffer 69 to the power supply device 70, the host display device 71,
The transmission lines 75, 76, 77, and 78 are connected to the CPU 2 to the I / O controller 7, the frame buffer 9 to the power supply 10, and the host display 1 of the host computer 1 in FIG.
1, since they are the same as the transmission lines 15, 16, 17, and 18, the description is omitted.

The graphic controller 68 includes a host display device 71 of the host computer 61 and a display terminal 7.
2 to 74, and includes a host display device 71 and a plurality of display data output ports to each of the display terminals 72 to 74 as shown. In a system in which n display terminals are connected, the graphic controller needs to have n output ports. Since the signals output to the respective output ports to the display terminals 72 to 74 are all the same data, the output stage of the graphic controller 68 actually has n
It is possible to realize this simply by installing a plurality of output buffers and wiring the output signals from each output buffer to the ports connecting the display terminals 72 to 74.

The display terminals 72 to 74 are held by the listener, and the user can listen to the explanation while watching the displayed screen. The second embodiment of the present invention is different from the display terminals 12 to 14 of the first embodiment in that the display terminals 12 to 14 are not daisy-chained in the second embodiment of the present invention. In this case, there is no need for two cable connection ports, and only one cable connection port. Display data output ports 79 and 82 output the same data as 76. Serial data communication paths 80, 8
3 is the same as 77 and is connected to the I / O controller 67. The power supply lines 81 and 84 are the same as the power supply lines 78 and supply power from the power supply device 70 to each of the display terminals 72 to 74.

FIG. 11 is a block diagram showing a configuration example of a graphic controller peripheral circuit built in the host computer 61 of the information processing system according to the second embodiment of the present invention. The graphic controller peripheral circuit according to the second embodiment of the present invention includes a graphic controller main body 90, a display data output port (0) 9
2, display data output port (1) 93, display data output port (2) 94, display data output port (3) 95 ...
A display data output port (n) 96 is provided. 7 in the figure
1 is a host display device, 91 is a frame buffer, and 97 is a system bus. The peripheral circuit including the graphic controller main body 90 corresponds to the graphic controller 68 in FIG. 10, and the frame buffer 91 corresponds to the frame buffer 69 in FIG.

In detail, the frame buffer 91, the display data output port (0) 92, and the display data output port (1) 93 are composed of the frame buffer 31, the display data output port (0) 32 in FIG. , The display data output port (1) 33, the system bus 97 is the same as the system bus 34 in FIG. 3, and the host display device 71 is the same as the host display device 11 in FIG. Description is omitted.

The graphic controller main body 90 is connected to the system bus 97 of the host computer 61, writes / reads display data to / from the frame buffer 91, and sends the display data read from the frame buffer 91 to the display data output port. Output to At this time, the host display device 71 and the display terminals 72 to 7
The display clock (dot clock), the synchronization signals (Vsync, Hsync), and the display data are output at the timing adjusted to 4. There are logically two display data output ports. One is for the host display device 71 of the host computer 61, and the other is for the display terminals 72 to 74. However, since the same signal is output on the output ports for the display terminals 72 to 74, there are logically two output ports 92 and (93, 94, 95, 96).

FIG. 12 is a block diagram showing a configuration example of the display terminal 101 of the information processing system according to the second embodiment of the present invention. The display terminal 101 of the information processing system according to the second embodiment of the present invention includes a graphic controller 102, a frame buffer 103, and a display device 10.
4, a control unit 105, a RAM 106, a ROM 107, a communication interface 108, a key input device 109, a point input device 110, and a power supply device 111. The display terminal 101 corresponds to the display terminals 72 to 74 in FIG. Note that the configuration illustrated in FIG. 12 is an example, and the configuration is not limited to the illustrated configuration.

The above configuration will be described in detail. The graphic controller 102 to the ROM 107 of the display terminal 101, the key input device 109 to the power supply device 111, the display data transmission line 1
12 to the power supply line 114, the display terminal 41 in FIG.
Since they are the same as the graphic controller 42 to the ROM 47, the key input device 49 to the power supply device 51, the display data transmission path 52 to the power supply line 54, the description is omitted.

The communication interface 108 has a screen ID
And an interface for receiving display data, and a transmission path interface for bidirectionally exchanging data different from the display data. Further, the display data is transferred to the graphic controller 102 as necessary, and the bidirectional transmission path is connected to the control unit 105, and the control unit 105 is connected to the graphic controller 102. The bi-directional transmission path handles a small amount of data, such as input data from the key input device 109 or the point input device 110, and does not require a very large data transfer band, and a pin of an interface connecting the host computer 61 and the display device 104. Use serial communication transmission lines to reduce the number and number of signals.

The difference between the second embodiment of the present invention and the first embodiment is that daisy-chain connection is not performed in the second embodiment of the present invention. There is no means for transferring data to the next display terminal in the communication interface.

The operation of transmitting display data from the host computer 61 to the display terminals 72 to 74, the memory address map in the frame buffer 69 inside the host computer 61, the display data output by the graphic controller 68 of the host computer 61 The output timing and the operation when the display terminals 72 to 74 receive the display data are the same as those in the first embodiment, and a description thereof will be omitted.

As described above, according to the information processing system according to the second embodiment of the present invention, the host computer comprises: a frame buffer 69 for storing a plurality of screen display data; A screen ID for identification is added to a plurality of screen display data
A graphic controller 68 for sequentially outputting and outputting the screens one by one; each display terminal checks the screen ID of the screen display data transmitted from the host computer, and displays the screen display data determined to be necessary; It has a frame buffer 103 for storing the determined screen display data, and each display terminal is directly connected to the host computer.

Conventionally, when it is desired to give an explanation to a plurality of persons at a business talk or a meeting, the limitation of the area of the whiteboard and the time restriction which existed when the whiteboard was used are eliminated. Since the room does not need to be darkened, the problem that the listener has difficulty in taking notes and taking notes can be solved.

When a computer screen is to be viewed by a plurality of people, a large screen or a large-sized display such as a large-sized television requires a large area because the display itself is large. According to this, a large space is not required because each of the listeners can hold the display terminal at hand.

Further, conventionally, since a plurality of persons have to look at one display screen, there is a page that a certain person wants to see again among pages used for the explanation so far, and the explainer has requested. When the previous page is displayed, there is a drawback that other people can see only the same screen uniformly. However, according to the present invention, since the screen desired by each person can be displayed on the display terminal, it is very difficult. It is convenient.

It is considered that such a function can be realized by distributing one notebook computer to each listener, connecting the computers via a LAN, and executing appropriate application software. However, this method is complicated. However, there is a disadvantage that the whole system becomes very expensive because the number of expensive notebook computers required for the number of people is increased, but according to the present invention, the display terminal is much simpler than the notebook computer. Since it can be realized by the structure, there is an economic effect that a system that is less expensive than using a plurality of notebook computers can be realized.

As in the second embodiment, the host computer has a plurality of display terminal connection means (display data output ports 92 to 96), and each display terminal is directly connected to the host computer, a so-called star type. When the connection is made, only one connection port is required for the display terminal, so that the device configuration is simplified and the display terminal can be realized at low cost.

In the second embodiment, however, the host computer needs to provide a plurality of connection ports for connecting a plurality of display terminals. This leads to an increase in the price and size of the device as compared with the embodiment. However, since the maximum number of connections of the display terminal is the number of connection ports provided in the host computer, the power supply capacity supplied to the display terminal can be accurately predicted.

Therefore, when a system for connecting a small number of display terminals is constructed, adopting the second embodiment has the effect that the entire system can be realized at low cost.

[Other Embodiments] The first embodiment of the present invention described above.
In the second embodiment, an example has been described in which the power of each display terminal is supplied from the host computer. However, a configuration in which a battery and each AC power supply device are provided on each display terminal side may be employed. Needless to say.

Further, in the above-described first and second embodiments of the present invention, a case where a display terminal only performs display as a terminal possessed by a listener has been described as an example. It is also applicable to information terminals. In this case, the function (program) of the present invention described above is stored in the portable information terminal.
It becomes feasible by mounting. For example, a company that distributes personal digital assistants to salespeople and allows them to carry out sales activities can use existing personal digital assistants that are considerably cheaper than notebook computers with only minor modifications. There are advantages.

The present invention may be applied to a system composed of a plurality of devices or an apparatus composed of one device. A storage medium storing software program codes for realizing the functions of the above-described embodiments is supplied to a system or an apparatus, and a computer (or CPU or MPU) of the system or the apparatus executes the program code stored in the storage medium. Needless to say, this can also be achieved by executing the reading.

In this case, the program code itself read from the storage medium implements the functions of the above-described embodiment, and the storage medium storing the program code constitutes the present invention.

As a storage medium for supplying the program code, for example, a floppy disk, hard disk, optical disk, magneto-optical disk, CD-ROM, CD
-R, a magnetic tape, a nonvolatile memory card, a ROM, or the like can be used.

When the computer executes the readout program code, not only the functions of the above-described embodiment are realized, but also the OS and the like running on the computer are actually executed based on the instructions of the program code. It goes without saying that a part or all of the above-described processing is performed, and the functions of the above-described embodiments are realized by the processing.

Further, after the program code read from the storage medium is written into a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, based on the instructions of the program code, It goes without saying that the CPU provided in the function expansion board or the function expansion unit performs part or all of the actual processing, and the processing realizes the functions of the above-described embodiments.

[0103]

As described above, according to the information processing system according to claims 1 to 4, the display control method according to claims 6 to 9, and the storage medium according to claim 11, the following effects can be obtained. Play.

Conventionally, when it is desired to explain to a plurality of persons at a place such as a business talk or a meeting, there are no restrictions on the area of the whiteboard and restrictions on time when using the whiteboard. Since the room does not need to be darkened, the problem that the listener has difficulty in taking notes and taking notes can be solved.

In addition, when a computer screen is to be viewed by a plurality of persons, a large screen or a large-sized display such as a large-sized television requires a large area because the display itself is large. According to this, a large space is not required because each of the listeners can hold the display terminal at hand.

Conventionally, since a plurality of persons have to look at one display screen, there is a page that one person wants to see again among pages used for the explanation so far, and the explainer has requested. When the previous page is displayed, there is a drawback that other people can see only the same screen uniformly. However, according to the present invention, since the screen desired by each person can be displayed on the display terminal, it is very difficult. It is convenient.

It is thought that such a function can be realized by distributing one notebook computer to each listener, connecting the computers via a LAN, and executing appropriate application software. However, this method is complicated. However, there is a disadvantage that the whole system becomes very expensive because the number of expensive notebook computers required for the number of people is increased, but according to the present invention, the display terminal is much simpler than the notebook computer. Since it can be realized by the structure, there is an economic effect that a system that is less expensive than using a plurality of notebook computers can be realized.

An information processing system according to claim 5,
According to the display control method of the tenth aspect, the following effects can be obtained.

If the information processing apparatus has a plurality of display terminal connection means and each display terminal is directly connected to the information processing apparatus, that is, in a so-called star connection, only one connection port is required for the display terminal. And the display terminal can be realized at low cost.

However, on the information processing apparatus side, it is necessary to provide a plurality of connection ports for connecting a plurality of display terminals, and if a large number of display terminals are to be connected, an increase in the price and size of the equipment will be caused. become. However, since the maximum number of connections of the display terminal is the number of connection ports provided in the information processing device, the power supply capacity supplied to the display terminal can be accurately predicted.

Therefore, when a system for connecting a small number of display terminals is formed, the star-type connection system has an effect that the entire system can be realized at low cost.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration example of an information processing system according to a first embodiment of the present invention.

FIG. 2 is an external view showing an outline of an information processing system according to first and second embodiments of the present invention.

FIG. 3 is a block diagram illustrating a configuration example of a graphic controller peripheral circuit built in a host computer configuring the information processing system according to the first embodiment of the present invention;

FIG. 4 is an explanatory diagram showing an example of a memory address map in a frame buffer of a host computer constituting the information processing system according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram showing another example of the memory address map in the frame buffer of the host computer configuring the information processing system according to the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating an operation of outputting display data to a display data output port 1 of a host computer included in the information processing system according to the first embodiment of the present invention.

FIG. 7 is a timing chart showing an output signal timing to a display data output port 1 of a host computer constituting the information processing system according to the first embodiment of the present invention.

FIG. 8 is a block diagram illustrating a configuration example of a display terminal included in the information processing system according to the first embodiment of the present invention.

FIG. 9 is a flowchart illustrating a process of receiving display data at a display terminal included in the information processing system according to the first embodiment of the present invention.

FIG. 10 is a block diagram illustrating a configuration example of an information processing system according to a second embodiment of the present invention.

FIG. 11 is a block diagram illustrating a configuration example of a graphic controller peripheral circuit built in a host computer configuring an information processing system according to a second embodiment of the present invention.

FIG. 12 is a block diagram illustrating a configuration example of a display terminal configuring an information processing system according to a second embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a configuration example of storage contents of a storage medium storing a program and related data of the present invention.

FIG. 14 is an explanatory diagram showing a conceptual example in which a program and related data of the present invention are supplied from a storage medium to an apparatus.

[Explanation of symbols]

 1, 61 Host computer 2, 62 CPU 3, 63 RAM 4, 64 ROM 5, 65 Input device 7, 67 I / O controller 8, 68 Graphic controller 9, 69 Frame buffer 11, 71 Host display device 12-14, 41 Display terminal 16, 76, 79, 82 Transmission line 17, 77, 80, 83 Transmission line 42, 102 Graphic controller 43, 103 Frame buffer 44, 104 Display device 45, 105 Control unit 46, 106 RAM 47, 107 ROM 48, 108 Communication interface 49, 109 Key input device 50, 110 Point input device

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (11)

[Claims] 1. An information processing system in which a plurality of display terminals and an information processing device for managing each of the display terminals are communicably connected, wherein the information processing device stores a plurality of screen display data. Means, and a screen identification screen I for the display terminal in the plurality of screen display data of the device-side storage means.
Output control means for sequentially outputting one screen at a time with D added, wherein each of said display terminals is a terminal-side storage means for storing screen display data determined to be necessary, and transmitted from said information processing apparatus. A display control means for displaying the screen display data determined to be necessary by checking the screen ID of the displayed screen display data. 2. A screen to be displayed on each of said display terminals from said information processing device can be designated from said device-side input means of said information processing device, and said terminal of each of said display terminals can be specified. From the side input means, it is possible to specify a screen to be displayed for each of the display terminals, and in the information processing device, information indicating which screen is displayed by each of the display terminals from each of the display terminals is displayed. The information processing system according to claim 1, wherein the information is received and managed. 3. The information processing apparatus further includes: a device-side communication unit that performs data communication with the display terminal; a device-side display unit that performs a display; a device-side input unit that inputs a command or a message; The display terminal further includes a device-side temporary storage unit that temporarily stores, a device-side fixed storage unit that stores a program and data, and a device-side control unit that performs a program execution and an arithmetic operation. Terminal-side communication means for performing data communication with the terminal, terminal-side display means for displaying, terminal-side input means for inputting commands and messages, terminal-side temporary storage means for temporarily storing data, and storing programs and data. A terminal-side fixed storage unit, and a terminal-side control unit that executes a program or performs a calculation, wherein the output control unit of the information processing device is the device-side display unit of the information processing device. A plurality of output ports for outputting to the display terminal, a one-way transmission line for outputting the screen display data from the information processing device to the display terminal, and a one-way transmission path for outputting the screen display data from the information processing device to the display terminal. 3. A bidirectional transmission path for transmitting data other than screen display data and transmitting data from the display terminal to the information processing apparatus.
The information processing system as described. 4. Each of the display terminals is connected to the information processing device in a daisy chain in a chain, and each of the display terminals sequentially transmits the screen display data to a next-stage display terminal. 2. The method according to claim 1, wherein the transfer is performed.
An information processing system according to any one of claims 1 to 3. 5. Each of the display terminals is directly connected to the information processing device, and the information processing device
The information processing system according to claim 1, further comprising a display terminal connection unit that connects the display terminals. 6. A display control method applied to an information processing system in which a plurality of display terminals and an information processing device that manages each of the display terminals are communicably connected, wherein the information processing device includes a plurality of screen displays. A device-side storing step of storing data in a device-side storing means; and adding a screen ID for screen identification to the plurality of screen display data of the device-side storing step to the display terminal, and sequentially outputting and outputting one screen at a time. An output control step, wherein each of the display terminals has a terminal-side storing step of storing screen display data determined to be necessary in a terminal-side storage unit, and a screen ID of screen display data transmitted from the information processing apparatus.
And a display control step of displaying screen display data determined to be necessary. 7. The information processing apparatus can specify a screen to be displayed on each of the display terminals from the information processing apparatus, and each of the display terminals can display a screen on each of the display terminals. 7. The display according to claim 6, wherein a screen to be specified can be specified, and the information processing apparatus receives information indicating which screen is displayed by each of the display terminals from each of the display terminals and manages the information. Control method. 8. The information processing apparatus further includes: a device-side communication step for performing data communication with the display terminal; a device-side display step for displaying on the device-side display means; A device-side input step of inputting a message, a device-side temporary storage step of temporarily storing data in the device-side temporary storage means, and a device-side fixed storage step of storing a program or data in the device-side fixed storage means,
A device-side control step of executing a program or an arithmetic operation, wherein each of the display terminals further includes a terminal-side communication step of performing data communication with the information processing device, and a terminal-side display step of performing display on a terminal-side display unit. And a terminal-side input step of inputting an instruction or a message via the terminal-side input means, a terminal-side temporary storage step of temporarily storing data in the terminal-side temporary storage means, and a program or data stored in the terminal-side fixed storage means. A terminal-side fixed storage step, and a terminal-side control step of executing a program or performing an arithmetic operation. In the output control step of the information processing apparatus, the output control step of the information processing apparatus includes a plurality of display units, Performing an output through an output port of the information processing apparatus, outputting the screen display data from the information processing apparatus to the display terminal via a one-way transmission path, Transmitting data other than the screen display data from the information processing apparatus to the display terminal via the bidirectional transmission path, and transmitting data from the display terminal to the information processing apparatus via the bidirectional transmission path. The display control method according to claim 6 or 7, wherein 9. Each of the display terminals is connected to the information processing apparatus in a daisy chain in a chain, and each of the display terminals sequentially transmits the screen display data to a next-stage display terminal. 7. The method according to claim 6, wherein the transfer is performed.
9. The display control method according to any one of claims 1 to 8. 10. The display device according to claim 1, wherein each of the display terminals is directly connected to the information processing apparatus, and the information processing apparatus connects the display terminals via display terminal connection means. Item 9. The display control method according to any one of Items 6 to 8. 11. A storage medium readable by a computer storing a program for executing a display control method applied to an information processing system in which a plurality of display terminals and an information processing device managing the display terminals are communicably connected. In the display control method, the device-side storing step of storing a plurality of screen display data, and adding a screen ID for screen identification to the plurality of screen display data of the device-side storing step for the display terminal An output control step of sequentially feeding out and outputting one screen at a time, a terminal-side storing step of storing screen display data determined to be necessary, and determining that a screen ID of the screen display data transmitted from the information processing apparatus is required. A display control step of displaying the displayed screen display data.