JPS61267789A - 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 applies to electric power and gas installed over a wide area.

A graphical display device consisting of a graphic CRT display device connected to the terminal side of a business processing device used in the field of operational work using equipment such as water supply lines and communication lines, and particularly suitable for displaying equipment targeted for operational work. This invention relates to a graphic display device with special features.

Summary of B6 invention The present invention applies to electric power and gas installed over a wide area.

In a graphic display device consisting of 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 lines, communication lines, etc., necessary for displaying the screen area 1 of the CRT monitor. By providing a display memory that can bit-expand a much wider range of display figures compared to the size of the display memory, and by bit-expanding peripheral figures within the range to be displayed on the screen, the screen frame of the monitor can be expanded. It is possible to change the display by scrolling in response to a display request that exceeds the editing range, and furthermore, in response to a display request that exceeds the edit range to the display memory, bit expansion to the display memory using a new display center is performed, and regional This enables continuous display, and enables display of a wide area, including the surrounding area of the screen, when performing operational tasks.

The present invention will be described below using an example of application to a power system, particularly a power distribution system.

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

(2) Support for wide areas: Online systems operate over a wide area (i.e., installed equipment, so they support a wide display area and can 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 1 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 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 f1 side and host A centralized monitoring control system is realized by a configuration in which control information automatically processed by the stone 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.

Graphic CRT display device 11fl, CRT monitor 3 that performs refresh drawing using the Custascan display method
, with the display processor 4 as the control center,
Shape information to be displayed (line segment).

V7d<ru, t[) of letter S is segment buffer 5
Store it in 1.

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. This cutting process includes a matrix calculation processing section s2 that performs parallel translation and rotational transformation of the displayed figure. Clipping processing FB5a for removing portions of the CRT monitor 3 that protrude from the displayable screen frame
etc. are prepared, and the line segment of the cut out graphic information is further transferred from the display position (coordinate position) to the corresponding frame buffer 6.
A digital differential analysis (DDA) processing unit 54 is provided which develops on/off information of the upper bit.

The frame buffer 6 physically has bits that correspond one-to-one to each pixel on the screen of the CRT monitor 3. For color display, the frame buffer 6 has multiple bit planes, and uses the lookup table 7. to determine the display color. This will be explained with reference to FIG. The figure shows frame buffer 6
shows the case where has three bits 1-"j1/-/-il, 12, sweet 3, and the on/off of the bit corresponding to the segment buffer 5/10 graphic information is a combination of bit plane valves 1 to 3. Expanded and CRT
The display on the screen of the monitor 3 is performed by raster scanning the frame buffer 6, and using the combination value of the bits on of each bit plane 1 to 3 as an address, the display color table defined in the lookup table 7 is displayed. Followed R (red),
G (green) and B (blue) beam outputs are given to the CRT monitor 3.

Returning to FIG. 2, the host ambiator system 2 uses the host computer 8 as the control center, and divides data processed into graphical information as one of the processing functions of online processing into an appropriate format and stores it in auxiliary storage such as a magnetic disk. Graphical information in the range requested by the graphic CRT display device 1 is stored in the device 9 and sent to the interfaces 10 and 11.
The data is transmitted to the graphic CRT display device 11 through the transmission line communication line, and the received data is stored in the segment buffer 51 in the graphic CRT display device 1.

D1 Problems to be Solved by the Invention When a graphic CRT display device is used as a terminal device for a centralized monitoring and control system for electric power system equipment, among the above-mentioned (1) high-speed display and C) wide-area support, wide-area support is required. Regarding the need for support, for equipment spread over a wide area, for example, as shown in Figure 4, a part of the power distribution system is required due to the physical size of the CRT monitor screen. Since only the required range is displayed, a function is provided that can 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 cuts out the graphic information of the required display range from the segment buffer 5φ1 and performs bit expansion into the frame buffer 6.

For this reason, in the conventional processing method, each time there is a request to change the display range, data is transferred from the segment buffer 51 to the frame buffer 6.
This requires processing up to bit expansion at , which prevents prompt display switching, and after the previous display screen is once erased, an updated display screen is 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 with operational work, such as the need for skill to recognize positional relationships.

Means and Function for Solving Problem E2 In view of the above problems, the present invention provides a frame buffer that has a memory size width larger than the screen size of the CRT monitor and stores display figures expanded in bits. When there is a request to change the range that exceeds the display area of the frame buffer, the display is changed by scrolling the displayed figure within the memory frame of the frame buffer.When there is a request to change the display range that exceeds the memory frame of the frame buffer, The host computer system queries the display processor about the screen display area at that time, determines the new screen display center from the result, and issues a display request to the display processor.
Based on the results, a display processor is provided to newly cut out the graphical information in the display area from the segment buffer and display it on the frame buffer. For a display area that exceeds the memory frame of the buffer, the screen display processor extracts graphic information and changes the display screen according to instructions from the host computer.

F. Embodiment FIG. 1 shows a display graphic on a frame buffer as one bit plane in which the processing method of the present invention is applied to a power distribution system, and also shows the main part configuration for explaining the extraction of graphic information. In the figure, the memory size width WX, WY of the frame buffer 6 is made larger by -iA than the screen width WX, WY of the CRT monitor, which is indicated by the broken line block in the figure. The display figure that is bit-expanded in the frame buffer 6 is, for example, the display figure requested by the operator (the broken line block part).
The area is set approximately at the center and includes peripheral figures of the displayed 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 the level of widths WX and WY when cutting 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 WY, and the scanning input to the CRT monitor 3 is limited to the widths WX and WY.

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

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 indicates the desired direction of movement using a man-machine device such as a joystick. While instructing this direction, the unit change amount ΔX from the man-machine device in the X direction and the Y direction.

ΔY is continuously input to the graphics processor.

The graphics processor changes the scanning area determined for the frame buffer according to the unit change amount,
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.

In such a scrolling process, when the display change cost * exceeds the editing frame of the frame buffer 6, no graphic information is developed in the beyond range, and a black (background color) part is displayed on the screen. At this time, if the operator wishes to perform more continuous display, the operator issues this instruction to the host computer 8.

The host computer 8 requests the coordinate data of the display center from the display processor 4, receives the coordinate data from the display processor, combines it with internally stored display scale information, and expands the area to a new frame buffer 6. is calculated and requested to the display processor 4. Based on the request, the display processor 4 cuts out the graphic information of the new display range from the segment buffer 5φ and sends it to the frame buffer 6 as bit expansion information.
The frame buffer 6 is processed in cooperation with the A processing unit 54, etc.
Stores bit development data of figures centered on the display figure at the time of a display change request.

The display processor 4 then scans and displays the graphic based on the display change request by giving the CRT monitor 3 a display area of widths WX and WY corresponding to the screen frame of the CRT-i-monitor 3, centering on the graphic to be displayed. , enables scroll processing for this figure.

Accordingly, display changes in a range beyond the memory frame of the frame buffer 6 are performed by cutting out graphic information of the display processor in accordance with instructions from the host computer side. This process has the same change delay and temporary deletion of the screen as in the conventional method, but there is no need to clarify the connection relationship 2nd and 11th with the screen before the change when changing the display when the memory limit is exceeded. A scrolling display can be always prepared while displaying the entire area of the power distribution system without any trouble in changing the display.

G1 Effects of the Invention As described above, according to the present invention ζ:, the memory frame of the frame buffer is expanded to an area that exceeds the screen frame of a CRT monitor, and display figures are stored, and the area that exceeds the display area on the CRT monitor is stored. In response to a change request, the displayed figure within the memory frame range of the frame buffer is displayed by scroll processing, and in a change request that exceeds the memory frame range, the figure information of the new range is displayed in the center as it was at the time of the request based on instructions from the host computer side. In order to cut out the image from the segment buffer and display it in a scrollable manner, when a change request is made to a figure within the memory frame width range of the frame buffer, the screen is moved by instantaneous scrolling, and appropriate screen change processing is performed for all figure information. It can be performed.

[Brief explanation of drawings]

Figure 1 is a diagram showing the main parts for displaying graphics on the frame buffer and extracting graphic information in the processing method of the present invention, @2
3 is a diagram illustrating the configuration of an electric power system and an equipment monitoring device, FIG. 3 is an explanatory diagram of bit development and color display processing of graphic information in FIG. 2, and FIG. 4 is a diagram illustrating display graphics on a CRT monitor. DESCRIPTION OF SYMBOLS 1... Graphic CRT display device, 2... Host computer system, 3... CRT monitor, 4...
Display processor, 51... Segment buffer, 52... Matrix calculation processing unit, 53... Clipping processing unit, 54... DD person processing unit, 6...
Frame buffer, 7... Lookup table, 8
...Host computer, 9...Auxiliary storage device, 1
0, 11...Interface, n...Transmission path. Figure 1 7 Remba J now & non-solid

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 graphic has a wider range than the size of the display memory required to display the screen area of the CRT monitor. means for changing the display of a display figure within a 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; , when there is a display request in a range that exceeds the edit range to the display memory, the display information in the display area based on the new display center is cut out from the storage device and expanded to the display memory, regardless of the size and width of the display memory. A graphic display device characterized by being provided with a means for continuously displaying regionally.