JPS62276588A - Image control system for 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 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to an image control system for a display device that performs superimposed display of a plurality of dot memories corresponding to a display screen.

[Conventional technology]

As this type of display device, one having the configuration shown in FIG. 8 is conventionally known. In FIG. 8, 1 is a processor, 2 is a memory, 3 is a processor bus, 4 is a dot memory, 5 is a display bus, 6 is a display conversion unit, and 7 is a CR.
It is a T display. However, such display devices do not have a device for superimposed display, so in order to display superimposed images, multiple pieces of image data are input into the memory 2, and the processor 1 prioritizes each dot data. It was necessary to determine the order and transfer the dot data with a higher priority to the dot memory 4. For this reason, there was a drawback that superimposed display could not be performed at high speed.

[Problem that the invention seeks to solve]

As mentioned above, conventional display devices have a problem in that they cannot perform superimposed display at high speed.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide an apparatus that is capable of displaying a plurality of dot memories in a superimposed manner at high speed, and also capable of scrolling the superimposed area at high speed.

[Means for solving problems]

In a display device having a plurality of dot memories, the present invention provides a display control memory which is provided corresponding to each of these dot memories and stores display control data for each dot, and uses information in the display control memory to control the display control data of the plurality of dot memories. The display control is performed simultaneously for each dot, thereby producing an overlapping display.

[Effect]

According to the above configuration of the present invention, since a plurality of dot memories and corresponding display control memories are provided, display control with display priority for each dot can be performed without using a processor, and high-speed display of priority images can be performed. Superposition becomes possible.

In addition, since multiple dot memories are connected to the display bus, by changing the areas corresponding to each display in the dot memory and display control memory, the area corresponding to image overlay can be changed, and the overlay area can be quickly moved. You can perform scrolling.

〔Example〕

FIG. 1 shows an embodiment of the present invention, and the present invention will be explained in more detail below with reference to the drawings.

In FIG. 1, the same parts as in the previous FIG. It is a CRT display. Further, 8 is an overlay control device, 9 is a display control memory A, 10 is a display control memo IJB, 11 is an output control unit, 12 is a dot memory A,
13 is a dot memory B, 14 is a display control line A, and 15 is a display control line B. In Figure 1, processor bus 3
Processor 1. Memory 2. Dot memory A12.
Dot memory B13. An overlay control device 8 is connected. The inside of the superimposition control device 8 includes a display control memory A9. Display control memory B10. It is composed of an output control section 11.

Further, the dot memory A12 and the dot memory B13 are connected to the display bus 5, and the output control to each display bus is performed via the display control line A from the output control section 11 of the control device 8.
14 and display control line B15. The output control section 11 includes a display control memory A9. A logical operation is performed based on the display control data output from the display control memo U B 10, and the display control line A14 or display control line B15 is activated based on the result and the dot memory A12 or dot memory B is activated.
13 dot data is output to the display bus 5. A display conversion unit 6 is connected to the display bus 5, and a display is performed on a CRT display 7.

FIG. 2 is a specific example of the block diagram shown in FIG. 1, in which the output control section 11 is a comparator. Dot memory A1
2 corresponds to display control memory A9, and dot memory B1
3 corresponds to the display control memory B10. As for the superimposed image, a triangle and a circle are input into the dot memory A12, and a square is input into the dot memory B13.

The display control data currently input to the display control memory A9 is "1" for the triangle, "3" for 9 yen, and "O" for the remaining area.
”.On the other hand, the display control data input to the display control memory B10 is “2” for the square and “0” for the remaining area.
” is.

Also, display control memory A9. Display control memory B10, dot memory A12. Each area of the dot memory B13 surrounded by a broken line corresponds to the display image 16. (Hereinafter, this area will be described as a display compatible area.) In such a configuration, dot memory A12 and dot memory B13 transmit data to the head of display bus 5 when the respective display control lines A14 and B15 are activated. Output. When displaying, display control memory A9. The display control memo U B 10 is read at the same time and the respective data are sent to the comparator. As a result, if (display control data of display control memo IJ A 9)> (display control data of display control memo IJ B 10) is established, display control line A14 is activated and dot data of dot memory A12 is displayed. Output to bus 5. Furthermore, if (display control data in display control memory A9) < (display control data in display control memory BIO) is established, display control line B15 is activated and dot data in dot memory B13 is output to display bus 5. do. In this way, a superimposed display image f@16 is obtained.

FIG. 3 shows the overlapping area of FIG. 2 scrolled, and by deflecting the display corresponding areas of the dot memory B13 and the display control memory BIO, it is possible to scroll images with priority.

Figure 4 shows display control memory A9 and display control memo IJB.
10 display images @! 16.

A and B of the display image 16 in the figure correspond to the dots of the dot memory A12 and dot memory B13, respectively. Such superposition is possible dot by dot.

FIG. 5 shows dot memory A12. Dot data in dot memory B13 and display control memory A9. Display control memory B
This is an example where the graphics of display control data written to IO are different. In this way, the shapes of the dot memory and the display control memory do not have to be the same as shown in FIG. Further, in this example, the activation condition of the display control line A14 output from the comparator of the output control unit 11 is set as (display control data of display control memory A9)≧(display control data of display control memory BIO).

FIGS. 6 and 7 are examples of realizing superimposed images using only the display control memory A9. FIG. 7 shows a case where the B input of the comparator in the display control section 11 is fixed at "1", and FIG. 8 shows a case where the B input of the comparator in the display control section 11 is fixed at "0". As shown in the display images 16 of FIGS. 6 and 7, the superimposition priority order can be changed by changing the input value of the comparator.

〔Effect of the invention〕

As described above, according to the present invention, since a plurality of dot memories and a corresponding display control memory storing display control data for each dot are provided, display of each dot can be controlled without using a processor. Display control with priorities becomes possible, and images with priorities can be superimposed at high speed.

In addition, since multiple dot memories are connected to the display bus, changing the area corresponding to each display in the dot memory and display control memory will change the corresponding area for image overlay. High-speed scrolling of the area becomes possible.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a detailed diagram of an embodiment of the invention. FIG. 3 is a diagram of scrolling of the overlapping area.
Correspondence diagram between display control memory and display image Figure 6 below shows an example of application of the embodiment of this invention. Figure 7 shows a different embodiment of this invention. Figure 8 shows an example of changing the priority order of superimposition. , block diagram of a conventional display device 1 Processor 2 Memory 3 Processor bus 4 Dot memory 5 Display bus 6 Display conversion unit 7 CRT display 8 ... Overlay control device 9 ... Display control memory A 10 ... Display control memory B 11 ... Output control section 12 ... Dot memory A 13 ... Dot memory B 14 ... Display control line A 15...Display control line B 16...Display image patent applicant Fuji Electric Co., Ltd. (1 other person) Agent Patent attorney Tools Kugobe (2 others) 8゛Overlay control device 9゛Display control Memory A 10 Display control memory B 11 Output control unit 12 Dot memory 13; Dot memory B 14 Display control aA 15 Display control line B Block diagram of an embodiment of the present invention Fig. 1 Correspondence between display control memory and display image Drawing 4 Figure 1: Block diagram of conventional processor example Figure 8

Claims (1)

[Scope of Claims] In a display device having a plurality of dot memories for displaying images, a display control memory provided corresponding to each dot with the plurality of dot memories and storing display control data for each dot. An image control method for a display device, comprising: controlling image display in each dot memory based on display control data in the display control memory.