JPS62164175A - Picture display device - Google Patents

Abstract

PURPOSE:To perform smooth scrolls for plural windows without making a device large in size by providing a display control means which displays the window, and scroll of a window on a display picture scrolls the content of the said window memory. CONSTITUTION:When the scroll of a window 5' is indicated from an operation part 13, the bit of information of a window memory 1' is displayed at the window 5' on a display screen 4. When a requested area within the window 5' is displayed at the window 5 with the following operation, the scroll is terminated. On completing the scroll, a control 14 writes the content at an area within a window 1 set in a scroll memory 11 on a window area 3' within a display memory 2, and also, it stores an address within the memory 1' at the window 5. And the correspondence of the area 3' and its content to the area in the memory 1' is performed. Following that, the control 14 clears the content of the scroll memory 11, and a signal switching means 12 transmits the content of the display memory 2 to the display screen 4.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an image display device having a plurality of windows on a display screen.

(b) Prior Art In recent years, there have been computers called workstations that have excellent user interfaces and are highly interactive. Inside this workstation, a number of logical screens called windows are displayed on the screen, one window corresponds to one task, and multiple tasks can be performed simultaneously in each window, or one task can be performed simultaneously. There is a function that allows you to interrupt the process, move to another window, and when the work in that window is finished, return to the original window and resume the work (for example, ApolJoDomain).

This feature is commonly called multi-window.

In order to realize this function, it has an image memory larger than the display screen, and by specifying the area where the screen is to be displayed as the start address in the image memory, the background screen and the area within the screen can be
There is an LSI for image display control devices that can display two rectangular windows (e.g. Hitachi HD63484:Advan
cedCR'rController etc.).

It is understood that having multiple windows like this can simply realize multi-windows, but in reality, the more the number of windows increases, the more a display address generator is required, and in some cases, the display readability may be reduced. It is necessary to divide the starting cycle into multiple parts, and a high readout speed of the image memory is required, which is expensive and impractical.

Therefore, due to these circumstances, the following method is sometimes taken to display a plurality of windows on the screen.

First, a display memory of a size that can be displayed on the screen is associated with it, and this is set as a background screen, and this portion is always displayed on the screen. Apart from that, allocate window memory for each window. Then, the data from the image memory corresponding to the window is displayed on the background screen, and the window at that time is
Transfers information based on where it is displayed on the screen and realizes multi-window (e.g. concurrent C
(P/M, etc.) Let's now consider a case where a window is scrolled to display on the screen a part that is in the window memory but is not displayed on the screen. At this time, it is easier to read the screen while scrolling by smooth scrolling, which scrolls one dot line at a time. In raster scan type display devices, this is generally achieved by rewriting the display start address and dot address during the vertical retrace period.

(C) Problems to be Solved by the Invention At this time, an image display control device that can display one rectangular window on the screen can smoothly scroll one window, but cannot support multi-windows.

In addition, in the multi-window implementation method described above, data transfer processing is required when scrolling, but since the vertical synchronization period is very short, it is true that the contents of the image memory cannot be changed during this period. Each has its own drawbacks, such as being impossible to scroll smoothly and not being able to perform smooth scrolling.

2) Means for Solving the Problems The present invention solves the above-mentioned situation by providing smooth scrolling in each window in a system with multiple windows.
The present invention proposes a method for realizing this by providing a display control means that displays the window based on information from the corresponding window memory when a window and scroll are specified, and controlling the scrolling of the window on the display screen to the corresponding window. This is done by scrolling the contents of the window memory.

(e) Function Since one display control means can handle smooth scrolling of a plurality of windows, smooth scrolling of a plurality of windows can be performed without increasing the size of the device.

(F) Embodiment FIG. 1 shows a block diagram of an embodiment of the image display device of the present invention, in which fil(11 (11 is a window memory, (2) is each window memo IJ (11+IJ(11) of the contents of 11). Window area for storing each part (31 (display memory with 31 (31), (4) is display memo January 2) (to)
A display screen such as C:RT that displays the contents of the window area (31 (31 (31) is displayed in the window +51 (5
) (displayed in 51. (6) is the display memory (2) above.
and the display screen (4), each window (51 (one of 5H51) on the display screen (4)
Scroll memory 01 for setting and storing the arbitrary start address (8), number of vertical lines (9), and number of horizontal bytes α■ in the window memo January 11+11 (1) (!:
, the window memory 11) tl specified by the start address (8), the number of vertical lines (9), and the number of horizontal bytes α■ in the window (5) on the display screen (4) set in this scroll memory (company). ) +11, and a signal switching means port for displaying the contents of the other display screen (41 is the display memo January 2). OJ changes the contents of the scroll memory tt1 by operating from the above window (51 (operation section for specifying 51 and scrolling operations, Q41 is this operation section 03), and changes the contents of the display memo January 2). The window area +3031 (31) is a control section that changes the contents of window memory according to the contents of J (1 bar 1 j), and the display memo January 21 corresponds to the contents of any area in li (li). A table (15) is attached to store the number of animals.

Hereinafter, the operation of the apparatus of the present invention will be explained using the schematic diagrams of FIGS. 2 to 6. Normally, a window that scrolls into the scroll memory (6) is not set, and the signal switching device supplies only the signal from the display memo (January 2) to the display screen (4). displays only the contents of the display memory (2).
When you instruct to scroll window (5) from 13j,
The position information (7) of the window (5) on the display screen (4) is given to the control unit 0 mass scroll memo IJ (11), and the window area ( The contents stored in 3) are retrieved from the area information table □□□ which indicates which area in the corresponding window memo January 1) is given. Note that this area information includes table (1
It is given by setting the start address (8), the number of vertical lines (9), and the number of horizontal bytes σα in the window memo January 1) based on the memory of 5). As a result, as shown in Figure 2, the window (5) on the display screen (4) is
The information on the other display screens (4) will be displayed based on the display memo January 2), but the display on the display screen (4) will not change at all. . Next, by scrolling from the operation section diagram, the window memory (11) stored in the scroll memory (11) is displayed.
By changing the start address (8) of 1) sequentially, for example, by one dot or several dots during the vertical retrace period of the CRT,
Window memory (11 to display screen (4) window (
The image information given by 51f is shifted little by little,
When the desired area in the window memory (5J) is displayed, scrolling is stopped (Fig. 3).At this time, the contents of the window area (3) of the display memory (2) are transferred to the display screen (4). does not match the display in window (5).

After that, by operating the scroll end from the operation panel,
The control part α clause displays the contents of the area in the window memo specified by the start address (8), number of vertical lines (9), and number of horizontal bytes α set in the scroll memory memory. (2), and store the address in the tape (window memo January 1 stored in the scroll memory aD corresponding to the window area (3) in 51). the window area (
3) and its contents are stored in nine areas of the window memory (li (Fig. 4)).Next, the controller/l/section clears the contents of the scroll memory (11) and sends a signal. The switching means transmits the contents of the display memo (January 2) directly to the display screen (4). moreover,
Next, when scrolling the window (5) is instructed from the operation unit αJ, the corresponding window memo IJ is displayed as described above.
(The contents of 11 can be directly displayed on the display screen (4) and scrolled (Fig. 5).

(G) Effects of the Invention As described above, the image display device of the present invention is provided with a display control means for displaying a window based on information from the corresponding window memory when a window and scrolling are specified. Since the scrolling of the upper window is performed by scrolling the contents of the corresponding window memory, one display control means can support smooth scrolling of multiple windows without increasing the size of the device. An image display device that can perform smooth scrolling is provided.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the image display device of the present invention, and FIGS. 2 to 5 are schematic diagrams showing the operation of the image display device of the present invention. /# (31 (31... window area, (4)... display screen, (51 (51 (51... window, (6)...
Display control unit, (11)...scroll memory, ■...
・Signal switching means, day...operation unit, (141...control unit, shout...table.

Claims (1)

[Claims] 1) A plurality of window memories, a display memory that stores a plurality of arbitrarily set parts from each of these window memories, a display screen that displays the contents of this display memory for each window, and a display screen that displays the contents of the display memory for each window. It consists of a specifying means for specifying the specification and scroll mode, and a display control means for displaying the window based on information from the corresponding window memory when the specifying means specifies the window and scrolling. An image display device characterized in that a window on a display screen is scrolled by scrolling the contents of a corresponding window memory.