JPH0460740A - Network system - Google Patents

Abstract

PURPOSE:To share plural pieces of display data by providing a storage means storing plural pieces of display data and a control means controlling access for work stations on a display controller controlling the display of plural work stations. CONSTITUTION:The display controller 21 is provided with a video memory 23, the control part 22 and a communication control part 24. The display controller 21 is connected to the work stations 25 and 26 through a network 27. The video memory 23 stores display data on the size of a window displayed in the displays of the work stations 25 and 26, the names of the work stations and a display content. The control part 22 judges display data to be accessed as against the access request of reading and writing from the work stations 25 and 26 through the communication control part 24, and executes a processing. When the access request is newly generated, a necessary storage area is secured in the video memory 23.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a network system comprised of a plurality of workstations connected via a network and capable of exchanging data with each other.

[Conventional technology]

One of the ways to use a network system in which multiple workstations are connected via a network is to use the workstation display like a blackboard to collaborate during meetings via the network. has been done. In this case, the same common screen is displayed on each workstation, and information input from each workstation is displayed on this common screen. In this case, even if the workstations are located far apart from each other, the attendees can use it as if they were writing directly on the blackboard and other attendees could see their writing.

FIG. 4 shows an example of the configuration of a conventional network system, in which a plurality of workstations 11, 12, 13 are connected via a network 14. and a workstation consisting of, for example, workstation 1
One control system controls multiple other workstations 12
．． It receives input from 13 and displays the same information on the displays of each workstation 11, 12, and 13.

That is, when there is a display request from another workstation, the display data of the image displayed on the display window of one workstation is sent to the other workstation via the network 14, and the display data is sent to each display. displayed in the window.

[Problem to be solved by the invention]

However, in this case, the contents of the window displayed on one workstation's display are the same as the contents of the window displayed on the other workstation.
Since there is a one-to-one correspondence, there is only one display data that can be shared. In order to share multiple display data, each workstation must prepare multiple display control programs for window control according to the number of display data, which causes the problem of complicated program configuration. there were.

The present invention was devised to solve the above-mentioned problems, and an object of the present invention is to enable a plurality of display data to be shared by a simple display control program.

[Means to solve the problem]

In a network system in which a plurality of workstations are connected via a network, the present invention provides a storage means for storing a plurality of types of display data to be displayed on a display of the workstation, and a storage means that stores a plurality of types of display data to be displayed on a display of the workstation, and a storage means that responds to an access request from the workstation. and control means for controlling access to the display data in the storage means to the workstation.

[Effect]

In the present invention, the storage means stores a plurality of types of display data to be displayed on the display of the workstation. When an access request is made from a workstation, predetermined display data is transmitted from the storage means to a plurality of workstations in response to this request, and the same image is displayed on the display of each workstation.

〔Example〕

DETAILED DESCRIPTION OF THE INVENTION Hereinafter, features of the present invention will be specifically described based on examples with reference to the drawings.

FIG. 1 is a block diagram showing an example of the configuration of a display control device according to the present invention.

In the figure, reference numeral 21 indicates a display control device as a whole, and a control section 22. Video memory 23. i! ! ! It is equipped with a communication control section 24 and the like. This display control device 21 connects to a plurality of workstations 25°2 via a network 27.
6. The video memory 23 of the display control device 21 stores display data etc. displayed on the display of the workstation 25.25. The video memory 23 stores, for example, the size of the window displayed on the display of each workstation, the display contents of the workstation name 1 to be displayed, etc., as shown in Table 1.

Note that WSl is the name of the workstation 25, and 111s2 is the name of the workstation 26.

The first table control unit 22 performs reading, writing, new creation, etc. from the workstations 25 and 26 through the communication control unit 24.
A plurality of pieces of display data are shared by determining display data to be accessed in response to an access request such as deletion and executing processing. The video memory 23 can also be constructed by combining a relatively low-speed, large-capacity memory such as a magnetic disk with a high-speed memory such as a RAM (random access memory).

Next, the operation of the above-mentioned display control device 21 will be explained with reference to the flowchart of FIG. 2.

Upon receiving the access request, the control unit 22 examines the contents of the access request (step 31). If the access request is for reading, writing, or deletion, the requested display data is processed (step 32). For example, when there is a read request from the workstation 2526, the display data Δ can be displayed on the displays of both workstations 25 and 26, as shown in Table 1, so the communication control 3(a), (
As shown in b), display data A is displayed on the windows 25a and 25b of each workstation. Also,
Since the display data B can be displayed only on the display of the workstation 25, the display data B is sent only to the workstation 25, and as shown in FIG.
Display data B is displayed simultaneously with display data 8.

If the access request is a new creation, the free space in the video memory 23 is checked (step 33), and if there is sufficient free space, the necessary storage space is secured (step 34). Otherwise, the access request is canceled (step 35).

In the above embodiment, the display control device 21 is provided independently, but the display control device 21 can also be incorporated into the workstation 25 or 26.

〔Effect of the invention〕

As described above, according to the present invention, the display data of multiple types of displays is stored in the storage device and is transmitted to each workstation in response to a request from each workstation. Multiple display data can be shared without having to reserve a display control system.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of the configuration of a display control device according to the present invention, FIG. 2 is a flowchart showing an example of the flow of processing in the display control device, and FIGS. 3(a) and (b) are each workstation. FIG. 4 is a block diagram illustrating an outline of a conventional display control method. 11, 12.13.25.26: Workstation 14.27: Network 21: Display control device 23: Video memory 22; Control unit 24: 1fffffl line control a, 25b: Rai 7 Tow

Claims (1)

[Claims] 1. In a network system in which a plurality of workstations are connected via a network, a storage means for storing a plurality of types of display data to be displayed on the display of the workstation; and control means for controlling access to the workstation of display data of the means.