JPS61267788A - Graphic display unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] A. Industrial application field The present invention can be installed in a wide range of areas including nine electric power and gas stations.

A graphical display device consisting of a graphic CRT display device connected to the terminal side of a business processing device in five fields in which operational work is carried out using equipment such as water supply 9 communication lines, etc., and in particular a display method for equipment targeted for operational work. This invention relates to a graphic display device having the following characteristics.

Summary of B1 invention The present invention applies to electric power and gas installed over a wide area.

In a graphic display device comprising a graphic CRT display device connected to the terminal side of a business processing device in the field of operating business using equipment such as water supply 2 communication lines, the CRT
A display memory is provided that allows bit expansion of a wider range of display figures compared to the size of display memory required to display the screen area of the monitor, and peripheral figures within the range displayed on the screen can also be bit expansion. By doing so, it is possible to change the display by scrolling in response to a display request that exceeds the screen frame of the monitor, and it is possible to display a wide area including the peripheral area of the screen when performing operational work. The present invention will be described below using an example of application to a power system, particularly a power distribution system.

C0 conventional technology Graphic CRT display devices have traditionally been CAD-based.

Mainly creating figures in fields such as CAM and CIE.

Although it is often used for offline work such as correction,
Recently, the field of use as a terminal device for online systems has been increasing.

For example, in a centralized power distribution system monitoring and control system, a central computer serving as a master station processes a lot of information from a group of slave stations, but this information processing requires human cognitive ability through visual perception.
A graphic CRT display device is provided that enables quick and accurate online processing using 4UWr power and creativity.

In this centralized monitoring and control system, the graphic CRT display device that serves as the terminal device is required to have the following two points in terms of functionality and performance compared to conventional devices.

(1) High-speed display: Good responsiveness is an essential condition for online systems, and the process from display request to display completion must be performed quickly, and various display updates must also be performed quickly.

(2) Wide area support: Since the online system operates on equipment installed in a wide area, it must support a wide display area and be able to display the necessary range according to display requests.

In order to meet these demands, a system configuration called an intelligent terminal type has been adopted as a graphic display system.

As shown in FIG. 2, in this system, a graphic CRT display device l having a computer is used as a terminal side, and a host computer system 2 is connected to this terminal side via a communication line. Using this host computer system 2 as a master station, the slave stations collect various types of monitoring information in real time, display necessary display information on the graphic CRT display device 1, and receive commands from the graphic CRT display device 1 side and the host A centralized monitoring control system is realized by a configuration in which control information automatically processed by the computer system 2 is transmitted from the host computer system 2 to the slave station side.

In this configuration, a distributed processing system is used in which the host computer system 2 performs a large amount of arithmetic processing or data processing, and the computer in the terminal-side graphic CRT display device 1 performs display processing, thereby improving responsiveness on the terminal side. The load on the host computer system 2 is also reduced. The graphic display process in the configuration shown in FIG. 2 will be described in detail below.

The graphic CR7 display device 1 has a refresh drawing-i-line 5c RT monitor 3 using a rask scan display method, uses a display processor 4 as a control center, and has graphical information (line segments) to be displayed.

information such as symbols, characters, etc.) t-segment buffer 51
Store it in .

From the graphic information stored in the segment buffer 51, graphic information in a range (rectangular area determined by coordinate values) requested to be displayed is cut out. For this cutting process, a matrix calculation processing unit 52 that performs parallel translation and rotational transformation of the displayed figure, a clipping processing unit 53 that removes the portion that protrudes from the displayable screen frame of the CRT monitor 3, etc. are prepared, and the cut out figure The information line segment is displayed at the display position (
A digital differential analysis (DDA) processing unit 54 is provided which develops the on/off information of the bit on the frame buffer 6 corresponding to the coordinate position).

The 7-frame buffer 6 is physically a memory that has bits that correspond one-to-one to each pixel between the tubes of the CRT monitor 3. For color display, it has multiple bit planes and uses a look-up table 7. q. In the figure, 7 frame crosses 776 are three bit planes #1. #2. #3 is shown, and the on/off of the bit corresponding to the segment balance 510 graphic information is bit plane #1 to #
It is developed as a combination of 3. The display between the tubes of the CRT monitor 3 is performed by raster scanning the 7 frames x 7 and 6, and using the combination value of the bits on of each bit plane #1 to #3 as an address, the display color is determined in the lookup table 7. Each beam output of R (red), G (green), and B (blue) according to the table is given to the CRT monitor 3.

Returning to FIG. 2, the host computer system 2 uses the host computer 8 as a control center and divides data subjected to graphical information processing into an appropriate format as one processing function of online processing, and divides the data into an auxiliary storage device such as a magnetic disk. The graphical information in the range requested by the graphic CR7 display device 1 is stored in the interfaces 10, 11 . The data is transmitted to the graphic CR7 display device 1 through the communication line of the transmission line 12, and the received data is stored in the segment buffer 51 in the graphic CR7 display device 1.

Q. Problems to be Solved by the Invention When using a graphic CRT display device as a terminal device for a centralized monitoring and control system for power systems and equipment, among the above (1) high-speed display and (2) wide area support, In response to the need to support a wide area, for example, as shown in Figure 4, which shows part of the power distribution system for equipment installed over a wide area, power distribution to CRT monitors is limited due to the physical size of the screen. Since only a part of the system is displayed, a function is provided to switch and display the necessary range according to the operator's request.

In order to switch and display the required range, the display processor 4 extracts the graphic information of the required display range from the segment buffer 51 and expands the bits into the frame puffer 6.

For this reason, in the conventional processing method, every time there is a request to change the display range, processing from the segment buffer 51 to the bit development in the 7-frame packer 6 is required, and the display cannot be switched quickly, and the After erasing the image once, an updated display screen will be obtained after processing time.

In such a display range switching display, there is a delay between the switching display request and the actual display, which delays system operation, and the correspondence between the previous screen and the update screen.

There were problems such as the need for skill to recognize positional relationships, which caused confusion in operational work.

Means and Function for Solving the E0 Problem In view of the above problems, the present invention provides a frame buffer for storing display figures expanded in bits and having a memory dimension width larger than the inter-plane dimension of the CRT monitor. A display processor is provided that changes the display of the display figure within the memory frame range of the frame buffer by scroll processing when there is a request to change the range exceeding the display area on the CRT monitor. The scanning input range from the camera to the CRT monitor is changed.

F. Embodiment FIG. 1 shows the processing method of the present invention applied to a power distribution system as a display figure t on one bit plane on a 7-frame pack. In the figure, the memory size widths Wx, Wy of the frame back arrow are made larger than the screen widths wz, wy of the CRT monitor, which are indicated by broken line blocks in the figure. The display figure that is bit-developed into the 7-frame cross 776 is, for example, a range approximately centered around the display figure (broken line block portion) requested by the operator and including peripheral figures of the display figure.

Bit expansion into the frame buffer 6 having such a display graphic range is achieved by the display processor 4 expanding the graphic information cutting frame to a level of widths Wx and Wy when extracting the graphic information from the segment buffer 51. Realized. Further, the clipping level of the clipping processing unit 53 is set to the widths Wx and Wτ, and the scanning input to the CRT monitor 3 is limited to the widths wz and wy.

In the configuration of 5, for example, in response to a display range change request from an operator, the display processor 4 changes the non-display range for a graphic part within the range of the frame buffer 6 by scrolling the displayed graphic.

For example, suppose that the screen frame before the display change in FIG. 1 is a broken line block, and the operator wants to move the screen to the dashed dot line block in response to a display range change request. At this time, the operator uses the joystiff % man-machine device to indicate the desired direction of movement. While instructing this direction, unit changes ΔX and ΔY in the X and Y directions are continuously input to the graphic processor from the man-machine device. The graphics processor changes the scanning area defined for the frame buffer according to the unit change amount, and as a result, the screen moves continuously. At this time, the processing may be performed to individually shift in the X and Y directions, or the processing may be performed to shift in both directions in parallel. When the operator stops instructing movement when the target range is displayed on the screen, the movement of the screen stops.

G0 Effects of the Invention As described above, according to the present invention, the memory frame of the frame buffer is expanded to an area that exceeds the screen frame of the CRT monitor to store display figures, and the memory frame of the frame buffer is expanded to an area that exceeds the screen frame of the CRT monitor. In order to display the display figure within the memory frame range of the 7-frame buffer in response to a change request by scrolling, as long as the figure is within the memory frame width range of the frame buffer, figure information from the segment buffer is sent in response to the operator's display range change request. The screen is moved by scrolling without the need for drawers and bit development, and the display screen can be quickly and continuously changed while easily recognizing the relative positional relationship and connection relationship with the previous screen.

[Brief explanation of drawings]

FIG. 1 is a diagram illustrating display graphics on a frame buffer in the processing method of the present invention, FIG. 2 is a configuration diagram of a power system/equipment monitoring device, and FIG. 3 is a bit expansion and color of the graphic information in FIG. 2. FIG. 4, an explanatory diagram of display processing, is a diagram illustrating display graphics on a CRT 72. DESCRIPTION OF SYMBOLS 1... Graphic CRT display device, 2... Host computer system, 3... CRT monitor, 4...
- Display processor, 51... Segment buffer, 52... Matrix operation filling unit, 53...
- Clipping processing section, 54...DDA processing section, 6.
... Frame buffer, 7... Lookup table, 8... Host computer, 9... Auxiliary storage device, 10° 11... Interface, 12... Transmission line. Figure 1 Frame bar, V each upper cloudy display circular form M/ - ot, m rising class return track, trunk soot accumulation, U1 intercalary closing mouth ρdL red intercalary closing 5 cape kipubine to 1 娑袈

Claims (1)

[Claims] A graphic CRT display device is connected to the terminal side of business processing equipment in fields where operations are performed using equipment such as electric power, gas, water, communication lines, etc. installed over a wide area, and display items corresponding to the equipment are displayed. Display information consisting of a group of display items corresponding to map information such as groups, streets, and place names is stored in the storage device, and by specifying an area to be cut out and displayed from the stored display information, it is possible to display information within that area. In a graphic display device that displays equipment on a graphic CRT display device in correspondence with a map, the display device can display a wider range than the size of the display memory required to display the screen range of the CRT monitor. Means for providing a display memory capable of bit-expanding graphics, and changing the display of the display graphics within the memory frame range of the display memory by scroll processing when there is a display request for a range exceeding the display area on the CRT monitor. A graphic display device characterized by being provided with.