JP3221581B2 - Image display control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a display device such as a CRT, a plasma display, an EL element, etc., and displays graphics, graphs, characters, images, etc. on a display screen according to information inputted from the outside or internal processing information. The present invention relates to an image display control device capable of changing a part or all of a display image, and more particularly, to a technique for enabling high-speed and efficient image change.

[0002]

2. Description of the Related Art Recently, CRTs, plasma displays,
An intelligent operation panel equipped with a display function using a display such as an EL display, a communication function with a host computer, and an input function using a touch panel or the like has been put into practical use. Used in the field.

One of these intelligent operation panels is
One of the features is a function of easily changing the whole or a part of the graphic once drawn by the data input by the communication function or the operation of the touch panel by the operator, and further the calculation by the CPU in the apparatus. For example, JP-A-61-148489).

[0004]

In the prior art, after a part of the initially displayed screen is changed,
In order to display the first screen again, it is necessary to redraw the entire first screen from the beginning.

[0005] Further, after drawing the whole screen as a base first, the display of the small area is changed, and the whole screen is redrawn in order to return a part of the small area to the first base screen. There is a need to.

[0006] Furthermore, after drawing the entire screen as a base first, and then performing display change twice on a part of the small area, and returning to the state where the change was made once,
The entire screen must be redrawn, and thereafter, the first display change must be performed again. Here, since the drawing speed is generally proportional to the area of the drawing unit, according to the above-described conventional method, it is necessary to redraw the first base screen when the display is changed. There is a problem that does not improve. Further, since the display change usually consisting of the above-mentioned plurality of processing steps must be performed by the host computer to which the operation panel is connected, the program of the host computer becomes complicated, and in addition, the change between the host computer and the operation panel is difficult. There is a problem that the number of times of communication increases.

[0007] The present invention has been made in view of such circumstances, and has as its object to provide an image display control device capable of performing high-speed and efficient display changes by a simple processing procedure.

[0008]

According to the present invention,
An image display control device that superimposes and displays a sub-screen on a base screen displayed on a display, has a capacity capable of storing display data to be displayed on the display for one screen, and the storage data is stored in the display. The first that is output and displayed
A display memory including a memory plane, a second memory plane having a capacity capable of storing display data to be displayed on the display unit for one screen, and a display for the base screen when display on the base screen is performed Display control means for storing data in the first and second memory planes and storing display data for the sub-screen in the first memory plane when display on the sub-screen is performed; When erasing the sub-screen after displaying the sub-screen on the screen, the storage data of the second memory plane corresponding to the erasure area of the sub-screen is stored in the storage area corresponding to the erasure area of the first memory plane. And erasing control means for performing the erasing process by transferring and storing.

According to this invention, in addition to the first memory plane corresponding to the display contents of the display on a one-to-one basis, a second memory plane for storing only display data relating to the base screen is provided, and the erasing side relating to the sub-screen is provided. Is changed, the storage data of the second memory plane corresponding to the erasure area of the sub-screen is transferred and stored in the storage area of the first memory plane corresponding to the erasure area. To do. That is,
The erasing process is performed not by redrawing the base screen from scratch as in the prior art, but by copying a required area of the base screen stored in the second memory plane to the first memory plane.

Further, according to the present invention, a display including a base screen, a sub-screen superimposed on the base screen, and a sub-sub-screen superimposed on the base screen or the sub-screen is displayed. In the image display control device performed above, a first memory plane having a capacity capable of storing display data to be displayed on the display unit for one screen and having the storage data output to the display unit for display, A display memory including three memory planes, i.e., a second memory plane and a third memory plane having a capacity capable of storing display data to be displayed on the display unit for one screen; and a base for displaying the base screen. Display data for a screen is stored in the first, second, and third memory planes, and when display on the sub-screen is performed, the display data for the sub-screen is stored in the first memory plane. And stored in the second memory plane,
Display control means for storing the display data of the sub-sub-screen in the first memory plane when display is performed on the sub-sub-screen, and erasing the sub-screen after displaying the sub-screen on the base screen Means for performing the erasing operation by transferring storage data of the third plane corresponding to the erasing area of the sub-screen to a storage area of the first memory plane corresponding to the display area. Displaying a sub-screen on the base screen, displaying a sub-sub-screen on the sub-screen, and then erasing the sub-sub-screen, the second sub-screen corresponding to the erasure area of the sub-sub-screen. Second erase control means for performing the erase process by transferring and storing the storage data of the plane to a storage area corresponding to the erase area of the first plane.

According to the present invention, in addition to the first memory plane corresponding to the display content of the display on a one-to-one basis, display data relating to the base screen and the sub-screen are stored, and display data relating to the base screen are stored. A third memory plane for storing only the sub-screen, and when the display change on the erasure side with respect to the sub-screen is performed, the storage data of the third plane corresponding to the erasure area of the sub-screen is stored in the first memory plane. The erasing operation is performed by transferring and storing the data in a storage area corresponding to the display area, and when the display change on the erasing side with respect to the sub-sub-screen is performed, the erasing operation of the second plane corresponding to the erasing area of the sub-sub-screen is performed. The erasing process is performed by transferring and storing storage data in a storage area of the first plane corresponding to the erasure area.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the embodiments shown in the accompanying drawings.

FIG. 1 shows a configuration example when the present invention is applied to an intelligent type operation panel. The intelligent operation panel 1 is connected to an external device 2 that performs control / monitoring of a production line, control / monitoring of a physical distribution, control / monitoring of a disaster prevention / security system, process monitoring of a plant, etc. It functions as an operation terminal for performing switch input.

The display unit 3 includes a CRT, a liquid crystal display,
Plasma display, EL display, etc.
The display unit 3 displays a display screen in which screen elements for displaying various states and inputting signals are arbitrarily combined. The display screen is composed of various graphics such as characters, figures, numerical values, and graphs.

The display memory 4 stores display data to be displayed on the display unit 3 in a bit map format. In this case, the display memory 4 includes a first plane 4a, a second plane 4b, and a third plane. 4c has a memory capacity for three display screens.

These first to third planes have the following features.

(1) Each of the first to third planes has a memory capacity corresponding to each pixel of the display unit 3 on a one-to-one basis, and stores bitmap dot data in each memory.

(2) The first to third planes are independent of each other and do not share a screen area. Also, the role of each screen described later does not change.

(3) The data stored in the first plane among the first to third planes is displayed on the display unit 3. That is, the storage content of the first plane and the display content of the display unit 3 are 1
It corresponds to one to one.

The image data displayed on the display unit 3 is classified into the following three categories.・ Category A: Base screen ‥: Screen displayed first to perform a series of display operations, generally displayed on the entire screen ・ Category B: Sub-screen ‥: ‥ ... Display coordinates after base screen display Are reserved or displayed so that the whole or a part of the base screen is changed at some timing in a form in which the display coordinates are instructed at the time of display. What is displayed so that a part of it is changed after the sub-screen is displayed. When the display content of the display unit 3 is changed, if the display or the display of the base screen of the category A is changed, the display data is It is stored in all of the first to third planes.

When a display or a display change is made on the sub-screen of the category B, the display data is changed to the first data.
And stored in the second plane.

Further, when a display or a display change is performed on the display device of the category C, the display data is stored only in the first plane.

That is, the storage contents of the first plane are updated with the display data after the display change, regardless of which of the categories A, B, and C is changed.

When the display of the category A or B is changed, the stored content of the second plane is updated with the display data after the display is changed.

Only when the display of the category A is changed, the storage contents of the third plane are updated with the display data after the display is changed.

Next, a touch panel switch 5 is stacked on the display 3. The touch panel switch 5 has a plurality of small membrane-like switches responsive to pressure arranged in a matrix within a switch effective surface, and calculates input position information indicating which switch is designated by the operator in the arithmetic processing unit 6. Output to

The interface 7 includes RS232C, RS
It has a communication interface such as 422, RS485, Ethernet, GP-IB, parallel I / O, etc., and executes data transmission / reception with the external device 2.

The control memory 8 stores user screen data created by a user, an operation program for performing a required display operation, and the like.

The arithmetic processing unit 6 receives an operation request from the external device 2 or a request from the operator via the touch switch 5 and executes an arithmetic processing corresponding to the request by referring to data stored in the control memory 8. In response to the execution result, a command is issued to the graphic control unit 9 to control the display of the display unit 3 or a command is issued to the external device 2 via the interface 7.

The graphic control section 9 executes display control on the display section 3 in accordance with an operation command from the arithmetic processing section 6.

That is, in the apparatus of the embodiment shown in FIG. 1, basic display control is managed by the arithmetic processing unit 6, and data input from the external device 2, operation of the touch switch 5, and arithmetic processing of the arithmetic processing unit 6 are performed. When the contents and timing of the screen change are given by the result, the arithmetic processing unit 6 reads out the data for screen display stored from, for example, the control memory 8 and displays the display data to be displayed by the cooperative operation with the graphic control unit 9. Is stored in the display memory 4 including the first to third planes. The first of the stored data of the first to third planes
The data stored in the plane is read by the graphic control unit 9, and the read data is supplied to the display unit 3 so that the display data is displayed on the display unit 3.

When the display is changed, the arithmetic processing unit 6
As shown in the flowchart of FIG. 2, when performing a display change belonging to category A, the generated display data is first to first.
The same is stored for all the third planes (step 100).
130), when the display change belonging to category B is performed, the generated display data is similarly stored in the first and second planes (step 140), and when the display change belonging to category C is performed, the generated display data is stored. Is stored only in the first plane (step 15).
0).

Next, the operation of erasing the changed portion will be described.

(1) Erasing operation of display part belonging to category A When such an erasing operation is instructed, the arithmetic processing unit 6 refers to a corresponding area of the control memory 8 to execute a coordinate area requiring an erasing operation. Then, in cooperation with the graphic control unit 9, all the planes of the display memory 4, that is, the memory contents of the first to third planes are erased. By this processing, the corresponding area of the display unit 3 is deleted.

(2) Erasing Operation of Display Change Portion belonging to Category B (Step 170) When such an erasing operation is instructed, the arithmetic processing unit 6 refers to a corresponding area of the control memory 8 to perform an erasing operation. After confirming the required coordinate area, the memory contents of the corresponding coordinate area of the third plane of the display memory 4 are copied to the same area of the first plane in cooperation with the graphic control unit 9.

That is, since the display contents of category A (the state before displaying the display data of category B) are stored in the third plane, the memory contents of the corresponding coordinate area of the third plane are stored in the first plane. Is copied to the same area, the display portion of category B is erased in the corresponding area, and the display data of category A is restored.

(3) Erasing operation of display-changed portion belonging to category C (step 180) When such an erasing operation is instructed, the arithmetic processing unit 6 refers to a corresponding area of the control memory 8 to perform the erasing operation. After confirming the required coordinate area, the memory contents of the corresponding coordinate area of the second plane of the display memory 4 are copied to the same area of the first plane in cooperation with the graphic control unit 9.

That is, since the display contents of category A or the display contents of category A and category B (when the display change processing belonging to category B is being performed) are stored in the second plane, the second plane is displayed. By copying the memory contents of the corresponding coordinate area to the same area of the first plane, the display portion of the category C is deleted in the corresponding area, and the display contents of the category A or the composite display contents of the categories A and B are restored.

Next, a specific operation for displaying a sub-screen on the base screen and thereafter erasing the sub-screen will be described with reference to FIG.

FIG. 3 shows an operation management screen of the unmanned transport vehicle in the factory. FIG. 3 (a) shows an example of a base screen showing the operation route of the unmanned transport vehicle, and FIG. 3 (b) shows the transport vehicle. FIG. 3C shows an example of a sub-screen in which a figure of a carrier is overwritten on a base screen showing an operation route, and FIG. 3D shows a fixed figure of FIG. 3C. This is a display after the lapse of time (the transport vehicle is moving).

Here, FIG. 3 (c) to FIG. 3 (d)
In order to change the display to, the transport vehicle displayed in FIG. 3C is deleted, the operation route hidden under the transport vehicle is restored, and the position shown in FIG. The transport trolley must be displayed on the display. In addition, FIG.
In (d), the dashed line on the square around the carriage indicates the figure size and is not actually displayed.

The display change control is performed as follows.

First, in order to perform the display of FIG. 3 (c), the arithmetic processing unit 6 converts the data on the display screen stored in the control memory 8 to display the base screen of FIG. 3 (a). The display dot data corresponding to the display screen is created by reading and linking with the graphic control unit 9. Since the created display dot data is a base screen, it is stored in the first to third planes of the display memory 4. Next, the arithmetic processing unit 6 generates the sub-screen data of FIG. 3B in the same manner as described above, and stores it in the required coordinate area of the first and second planes of the display memory 4. Of course, the storage coordinates of the first plane and the storage coordinates of the second plane are the same. In this way, the screen shown in FIG. 3C in which the carrier is overwritten at a predetermined position on the operation route is displayed.

To change such a display to the display of FIG. 3D, first, if an instruction to delete the carriage shown in FIG. 3C is input, the arithmetic processing unit 6 communicates with the graphic control unit 9. By the cooperative operation, the storage data corresponding to the coordinate area K of the transport trolley among the storage contents of the third plane of the display memory 4 is read and transferred to the same coordinate area of the first plane as the above. As a result, the transport vehicle is deleted from the display screen of the display unit 3 and FIG.
An image of only the operation route as shown in (a) is displayed.
Then, assuming that a command to display the transport vehicle at the position shown in FIG. 3D is input thereafter, the arithmetic processing unit 6 reads data relating to the transport vehicle from the control memory 8 in the same manner as described above. Display dot data displayed at the position shown in FIG. 3C is created, and this is stored in the display memory 4.
In the first and second planes. As a result, as shown in FIG. 3D, the transport vehicle is displayed on the display screen of the display unit 3 at a required position on the operation route.

If the above-described erasing and displaying operations are continuously and promptly performed, the transporting trolley can display as if it were a moving image. As described above, according to this embodiment, it is not necessary to redraw the entire display when the display is changed, so that it is possible to minimize display flicker and to perform a series of display change operations at high speed. be able to. Next, an operation of displaying a sub-screen on the base screen, displaying the sub-sub-screen on the display screen, and then erasing a part of the sub-sub-screen will be described with reference to a specific example of FIG.

The screen shown in FIG. 4 is an example of a numerical table display of the production status at the production site in the factory. (A) shows the base screen, and (b) shows the inside colored red (substituted by hatching). (C) shows a sub-sub-screen of a bar graph, and (d) shows a composite display state of these base screen, sub-screen and sub-sub-screen. (E) shows a display state (a part of the bar graph is shortened) of the figure of (c) after a predetermined time, and (f) shows a display device on the base screen without displaying the sub-screen. Is displayed.

First, in order to perform the display of FIG. 4D, the arithmetic processing unit 6 converts the data related to the display screen stored in the control memory 8 to display the base screen of FIG. 4A. The display dot data corresponding to the display screen is created by reading and linking with the graphic control unit 9. Since the created display dot data is a base screen, it is stored in the first to third planes of the display memory 4. Next, the arithmetic processing unit 6 generates the sub-screen data shown in FIG. 4B in the same manner as described above, and stores it in the required coordinate area of the first and second planes of the display memory 4. Further, the arithmetic processing unit 6 operates as shown in FIG.
After the sub-sub-screen data of (c) is generated, it is stored in a required coordinate area of the first plane of the display memory 4. In this way, as shown in FIG. 4 (d), the bar graph with the background highlighted in red is superimposed on the base screen of the number table display. In the case of FIG. 4D, the sub-screen data is made to enter the background area other than the bar graph in the bar graph display area P. Whether or not to perform this processing can be selected.

Next, in order to make the display shown in FIG. 4 (d) shorter and display the bar graph as shown in FIG. 4 (e), the display area of the shortened portion J is changed to the display area shown in FIG. )
May be replaced with the sub-screen data.

Therefore, when a command relating to the display change of the bar graph is input, the arithmetic processing unit 6 operates in cooperation with the graphic control unit 9 to shorten the part of the bar graph and to restore the coordinates. The sub-screen data of the area J is read from the same area of the second plane of the display memory 4, and is transferred and stored in the same coordinate area of the first plane. That is, since the image composed of the base screen and the sub-screen before displaying the sub-sub-screen is stored in the second plane, the storage data of the area of the second plane is stored in the first plane. By transferring and storing in the same area, the display can be changed as shown in FIG.

At this time, in this embodiment, it is not necessary to redraw the base screen and the sub-screen as the base, so that
High-speed processing can be performed, and display flicker can be minimized.

Next, as shown in FIG. 4F, when the sub-screen (category C) is displayed directly on the base screen (category A) without displaying the sub-screen (category B), The screen is stored in all planes of the display memory 4, that is, in the first to third planes. The sub-sub-screen is stored only in the first plane of the display memory 4.
Therefore, when shortening the bar graph in this case, the base screen data corresponding to the coordinate area to be erased is read from the same area of the second plane of the display memory 4 and is read out from the same coordinate area of the first plane, as described above. May be transferred and stored.

In the embodiments shown in FIGS. 3 and 4, the base screen, the sub-screen and the sub-sub-screen are merely examples, and the present invention can be applied to any other screen. good. For example, examples of the sub-sub-screen include a digital meter, a line graph, a pie chart, a character string display, and a chart graph.

In the above embodiment, the data of the second or third plane is overwritten on the first plane when the data of the second or third plane is transferred and stored in the first plane during the erasing process. However, in addition to the above, the above processing is realized by performing a logical operation such as an OR operation, an XOR operation, an AND operation, and a bit inversion operation of the data of the first plane already stored and the data of the second or third plane. It is also possible.

In the above embodiment, the present invention is applied to an intelligent operation panel. However, the present invention can be applied to other devices having a display for displaying various statuses and a screen for inputting signals. You may make it apply.

[0055]

As explained above, according to the present invention,
When the display contents are changed or erased, these operations can be performed by performing data transfer between a plurality of display planes of the display memory, so that the above processing can be performed quickly and efficiently. . In the above transfer, only a part of the area that needs to be changed is transferred.
Display flicker can be minimized, and display quality can be improved.

[Brief description of the drawings]

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

FIG. 2 is a flowchart showing the configuration of an embodiment of the present invention.

FIG. 3 is a diagram showing a specific example of a screen change according to the present invention.

FIG. 4 is a diagram showing another specific example of a screen change according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Intelligent graphic operation panel 2 ... External equipment 3 ... Display part 4 ... Display memory 5 ... Touch switch 6 ... Calculation processing part 7 ... Interface 8 ... Control memory 9 ... Graphic control part

Claims (2)

(57) [Claims] 1. An image display control device for superimposing and displaying a sub-screen on a base screen displayed on a display device, wherein the display data to be displayed on the display device has a capacity capable of storing one screen. Is output to the display unit to perform display, and a second memory plane having a capacity capable of storing display data to be displayed on the display unit for one screen.
A display memory including a memory plane; and when the display regarding the base screen is performed, display data for the base screen is stored in the first and second memory planes, and a display regarding the sub-screen is performed. Display control means for storing the display data for the sub-screen in the first memory plane; and displaying the sub-screen on the base screen and then deleting the sub-screen. Image display control comprising: erasing control means for performing the erasing process by transferring and storing the corresponding storage data of the second memory plane to a storage area corresponding to the display area of the first memory plane. apparatus. 2. A display comprising a base screen, a sub-screen superimposed on the base screen, and a sub-sub-screen superimposed on the base screen or the sub-screen is displayed on a display. An image display control device, comprising: a first memory plane having a capacity capable of storing display data to be displayed on the display for one screen, the stored data being output to the display and being displayed; Having a capacity capable of storing display data to be displayed on one screen for one screen
And a display memory including three memory planes, i.e., a third memory plane, and a display screen for the base screen, wherein display data for the base screen is stored in the first, second, and third memory planes. When the display on the sub-screen is performed, the display data for the sub-screen is stored in the first and second memory planes. When the display on the sub-screen is performed, the display data of the sub-screen is displayed. Display control means for storing the sub-screen on the first memory plane; and displaying the sub-screen on the base screen and then deleting the sub-screen. First erasing control means for performing the erasing operation by transferring and storing the data in a storage area of the first memory plane corresponding to the display area; After the sub-screen is displayed, the sub-sub-screen is displayed on the sub-screen, and when the sub-sub-screen is to be erased next, the storage data of the second plane corresponding to the erasure area of the sub-sub-screen is stored in the sub-screen. A second erasure control means for performing the erasure processing by transferring and storing the data in a storage area corresponding to the erasure area of one plane.