JPH0749671A - Control system for display device - Google Patents

Abstract

PURPOSE:To control two sets of display device from the same information processor by providing first, second memories storing respective data of images of first, second display devices and switching over information from a display device control part between the update of the first memory and that of the second memory. CONSTITUTION:When the image data are inputted, the desired information is read out from a data base according to a signal inputted from an interactive input device 8, and the image data of the information are written in an image memory 3a through the display device control part 5 to be displayed on the first display device 2a. Then, when an output of a switching circuit 4 is switched to the image memory 3b, a text is read out from an external storage belonging to the information processor 1 according to the signal inputted from the interactive input device 8 to be written in the image memory 3b, and to be displayed on the second display device 2b. In such a manner, since the displays of two sets of display devices 2a, 2b connected to one information processor are controlled individually, the number of information processors 1 is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device control system, and more particularly to a display device control system in the case where two display devices are connected to the same information processing device.

[0002]

2. Description of the Related Art In a conventional system, when a plurality of display devices are connected to one information processing device, the same image is generally displayed on the display screens of the plurality of display devices. In the patent application of the invention disclosed in Japanese Patent Laid-Open No. 61-264430 entitled "Video information display device" (hereinafter referred to as prior application), two main cathode ray tubes are provided in one information processing device. Main cathode ray tubes (11L, 11
R) shows different images related to each other. However, in this prior application, two image sources (13L, 13R) are provided corresponding to each of the two cathode ray tubes, and the image from the image source 13L is the main cathode ray tube 11.
The information from the image source 13R is displayed on L and the image from the image source 13R is displayed on the main cathode ray tube 11R, and the operator arbitrarily distributes the information processed and displayed by one information processing device. It cannot be used for the purpose of displaying on either of the two display devices.

[0003]

As described above, in the conventional display device control system, two information processing devices are required for two display devices which display different images, which is a problem in the prior application. Even when displaying from one information processing device to two display devices as in the invention, the image sources to be displayed on the two display devices are pre-distributed and one information processing device is displayed. Is equipped with two display devices, and the information to be displayed is arbitrarily distributed according to the operator's selection.
The control of displaying on one display device was not performed. Therefore, the conventional system has a problem that an information processing device is required for each display device and a large number of information processing devices must be provided when it is necessary to observe a large number of display devices at the same time.

An object of the present invention is to solve the above-mentioned problems in the conventional system and to provide a control system of a display device which can freely control two display devices from the same information processing device. I am trying.

[0005]

In a display device control system according to the present invention, a first image memory for storing image data of an image to be displayed on the first display device and a second display device for displaying the image data are displayed. Second to store image data
Image memory is provided and the information from the display device controller is switched by the switching circuit to switch between the first image memory and the second image memory. Therefore, according to the information from the display device control unit, new information from the display device control unit is displayed on the display device that displays the updated contents of the image memory.

[0006]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention. One information processing device 1 is provided with a first display device 2a and a second display device 2b and is displayed on the first display device 2a. The image data to be stored is stored in the image memory 3a, is read at a predetermined frame period, and is displayed on the display device 2a. The image data displayed on the second display device 2b is stored in the image memory 3b,
It is configured to be read at a predetermined frame period and displayed on the display device 2b. The contents of the first and second image memories 3a and 3b are updated by the data from the display device controller 5 whenever necessary, and which image memory is updated is switched by the switching circuit 4.

The information processing apparatus 1 is provided with an interactive input device 8 and a pointing device 9 such as a mouse, and the image data displayed on the display device of the interactive input device 8 is stored in the third image memory. Stored in 7. Further, the cursor position controlled by the pointing device 9 and the cursor position of the cursor that displays the input point from the keyboard of the interactive input device 8 are configured to be recognized by the cursor position recognition unit 6. .

FIG. 2 is an explanatory diagram showing an example of an image displayed on the first display device 2a and an image displayed on the second display device 2b. Reference numeral 21 is a cursor of the interactive input device 8.
Reference numeral 22 is a cursor of the pointing device 9, and 23 is a graph showing changes in the stock price of the selected issue. It is assumed that the switching circuit 4 is switched so that the image memory corresponding to the display device (2b in the example of FIG. 2) where the cursors 21 and 22 are displayed is updated.

The operation of the system shown in FIG. 1 will be described below. Although various methods can be considered for the switching control of the switching circuit 4, for example, when the first command is input from the interactive input device 8, the first image memory 3 is input.
It can be set so that it can be switched to the second image memory 3b by switching to a and inputting the second command. First, the first image memory 3a is switched to and the image data shown in the upper part of FIG. 2 is input.
Although not shown in the figure, since the information processing device 1 is connected so as to be able to access the database via a LAN or the like, according to a signal input from the interactive input device 8,
The price information of the desired stock is read from the database in which the latest price information regarding each stock issue is stored, and the image data of the information is first passed through the display device control unit 5.
Image memory 3a. The display shown in the upper part of FIG. 2 is performed on the display device 2a.

Next, a description will be given of a display when a trade of a stock of a certain brand is completed, and this trade is registered in an external storage device (not shown, for example, a floppy disk) of the information processing apparatus 1. First switching circuit 4
The output of is switched to the second image memory 3b. In accordance with a signal input from the interactive input device 8, the text shown in the lower part of FIG. 2 is read from the external storage device attached to the information processing device 1 and converted into image data by the display device control unit 5. Second image memory 3a
Written in. The display shown in the lower part of FIG. 2 is displayed on the display device 2b. The operator inputs the data of the established transaction while observing the position of the cursor 21. The entered transaction data is displayed on the display device 2b. The parties to the transaction confirm the transaction by observing the displays on the two display devices 2a and 2b, and the content of the transaction displayed on the display device 2b is stored in the external storage device by a signal from the interactive input device 8. .

It is also possible to control the switching circuit 4 by moving the display position of the cursor 22 by a signal from the pointing device (mouse) 9. When the pointing device 9 is moved, the amount of movement of the cursor display position (for each of the X-direction and Y-direction components) is input. The cursor position recognition unit 6 recognizes the display position of the cursor by adding the moving amount to the initial value of the display position of the cursor,
The display position of the cursor 22 of the mouse 9 is the first
The output of the switching circuit 4 is connected to the first image memory 3a when it is in the second display device 2a, and the output of the switching circuit 4 is set to the second image when the display position is in the second display device 2b. It is controlled to connect to the memory 3b. Regarding the cursor 21 of the interactive input device 8, the position in the first display device 2a and the position in the second display device 2b are separately stored and controlled in the cursor position recognition unit 6. In the example shown in FIG. 2, the cursor 21 is displayed only on the display surface on which the cursor 22 is displayed.

[0012]

As described above, according to the present invention, 1
Since two display devices can be connected to one information processing device and the display of these two display devices can be controlled separately,
An economic effect that the number of information processing devices can be reduced can be obtained.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 shows an example of display images displayed on the first display device and the second display device of FIG.

[Explanation of symbols]

 1 Information Processing Device 2a First Display Device 2b Second Display Device 3a First Image Memory 3b Second Image Memory 4 Switching Circuit 5 Display Device Control Section 6 Cursor Position Recognition Section 8 Interactive Input Device 9 Pointing Device

Claims (2)

[Claims] 1. A first display device and a second display device in which information processed by one information processing device is distributed and displayed, and information displayed in the first display device is stored and cycled. A first image memory that is read out and displayed periodically, a second image memory that stores information that is displayed on the second display device and that is read out and displayed periodically, An interactive input device for inputting commands and data relating to information to be processed and displayed, the first display device or the second display generated by the processing of the information processing device in response to input from the interactive input device. A display device control unit for controlling information to be displayed on the device, and a cursor indicating a notation position when inputting information to be displayed on the first display device or the second display device from the interactive input device. A cursor position recognition unit that stores a position in the first display device or the second display device, the contents of the first image memory by the output of the display device control unit and the output of the cursor position recognition unit. A control system for a display device, comprising: a switching circuit for switching between updating and updating the contents of the second image memory. 2. The cursor position recognizing unit has a function of recognizing a cursor position defined by a pointing device such as a mouse, and when the recognized cursor position is in the first display device, the display device. The contents of the first image memory are updated by the output of the control unit and the cursor position recognition unit, and when the recognized cursor position is in the second display device, the display device control unit and the cursor position. A control system for a display device, wherein the switching circuit is controlled so as to update the contents of the second image memory according to the output of the recognition unit.