JPS58211185A - Slit screen display control system - 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 Technical Field of the Invention The present invention divides the entire display screen into several partially overlapping partial screens, and displays independent information (characters, images, etc.) about the screen for each partial screen. The present invention relates to a display control method for a split screen that displays images, etc.), and is particularly aimed at simplifying the handling of overlapping portions between partial screens.

Technical Background When editing using a word processor, etc., it is easier to edit by displaying the text to be edited on the screen in addition to the text currently being input. When attempting to display a plurality of partial screens on the screen of one display device in this way, some of the adjacent partial screens may overlap depending on how the settings are made. In this case, it is necessary to display only the information on the upper partial screen in the overlapping area, and to prohibit the display of the information on the lower partial screen so that it is hidden from view.

Conventional technology and problems Conventionally, the information for controlling partial screen display considering the overlapped portions mentioned above was not independently stored, so it had to be processed by software, and the control was complex and the processing time was long. was there.

OBJECTS OF THE INVENTION The present invention aims to make split screen display easy and quick. By providing an instruction buffer and displaying while referring to this t-travel information, simple and high-speed display control is possible.

Structure of the Invention The present invention provides a control method for a display device that divides the entire display screen into a number of independent partial screens for display, which includes: a partial screen buffer that holds information to be displayed on each partial screen;
and a partial screen instruction buffer that stores a partial screen that is allowed to be displayed for the position of each unit area on the display screen, and when displaying the contents of each partial screen buffer on the screen, the partial screen is specified for each unit area. The display is characterized by referring to the contents of the instruction buffer and displaying only when display is permitted, and this will be explained in detail below with reference to the drawings.

Embodiment of the Invention Fig. 1 is a block diagram showing an embodiment of the present invention, where 1 is a console for inputting data, 2-1 to 1-N are each a maximum of one screen worth of data (at this stage, the code is ), and 3 is the input of data to these buffers.

4 is a partial screen instruction buffer added according to the present invention; 5 is the number #1 to N of the partial screen buffer outputted by the display control section 3 and one character read at that time; A comparison method that compares the numbers #1 to N of partial screen buffers that are accessed using the data display position as an address and outputted by the instruction buffer 4. 6 is a comparison method in which the display data is transferred to the screen buffer 7 only when the comparator 5 produces a matching output. 8 is a screen such as a CRT that displays the output (two-dimensional pattern) of the screen buffer 7.

Partial screen instruction buffer 4 and screen buffer 7 are both 1
It has the capacity of a screen, and is accessed using the character display position on the screen 8 given by the display control section 3 as an address. Note that since screen management is performed in units of characters, the area occupied by each character is the unit or unit area. FIG. 2 is an explanatory diagram of the partial screen instruction buffer 4, where 200 is an instruction information storage area corresponding to the entire screen 8, 201 to 203 are the thickness, display position, and priority (if they overlap on the screen, which one is on top). This is an instruction information storage area for partial screens 2-1 to 2-3 in which the order in which the screen is displayed is arbitrarily set.

In this example, three partial screens are set, and partial screen 2-
3 (number #3) is a partial screen 2-1 (number #l)
It is assumed that the partial screen 2-2 (number #2) is overlapped with the partial screen 2-2 (number #2). In this case, it is necessary to display parts of the partial screens 2-1 and 2-2 so that they are hidden in the shadow of the partial screen 2-3, so each unit area 213 of the area 203
(Only one is shown in the figure, but of course there are many.) Write the number #3 of partial screen 2-3 on all of them, and write the number #3 of partial screen 2-3 in the field @2 that does not overlap with this.
Each unit area 211 of 01 has number #1 of partial screen 2-1.
Similarly, the number #2 of the partial screen 2-2 is written in each unit area 212 of the area 202 that does not overlap with the area @203. These unit areas 211 to 213 correspond to the minimum display unit (character) on the screen 8. Note that a number #0 indicating unused is written in each of the remaining unit areas 214 of the area 200. Therefore, 0.1, 3.2.0 are written as the memory contents for a certain row l of the buffer 4. This applies to other lines as well.

Next, the overall operation will be explained. The display data input from the operation console 1 is first stored in a partial screen buffer corresponding to the partial screen on which work is currently being performed among 2-1 to 2-N, and then the display data is stored in the partial screen buffer corresponding to the partial screen on which work is currently being performed by the display control unit 3. It is read out along with the screen number and display position on the screen. At this time, the instruction buffer 4 outputs the partial screen number related to the output display position and sends it to the comparator 5. The comparator 5 compares the displayable partial screen number output from the partial screen instruction buffer 4 with the partial screen number output from the display control unit 3, and outputs 1 when they match, and outputs 1 when they do not match. outputs 0. Gate 6 is connected to display control unit 3 when the output of comparison m5 is 1.
The display data sent from the screen buffer 7 is directly sent to the screen buffer 7. However, when the output of comparator 5 is O, nothing is sent.

The screen buffer 7 stores all the display data sent from the gate 6 at an address corresponding to a designated display position, and displays the contents on the screen 8. As a result of such an operation, for example, if the partial screen currently being worked on is 2-1, the input data is simply displayed in the upper part of area 201, but it is moved downward and displayed on the line p, for example. When the display reaches the area 203, the display continues until the area 203 is reached, and after that, the data in the area 203 (if any) is displayed as is without being displayed. Although not displayed, all input data is stored in the partial screen buffer 2-1, so that if partial screen #3 is deleted or its position is changed, the entire partial screen #1 can be displayed.

The storage contents of the screens 7 for the areas 202 and 203 are controlled in the same way, and when the input for the partial screens 2-1.2-2.2-3 is completed, the screen on the display 8 corresponds to that shown in FIG. becomes.

The contents of the screen buffer 7 may be a code or a dot pattern corresponding to the pixels of the display screen. Naturally, in the latter case, the brightness of the CRT display 8 can be controlled immediately with the readout output of the screen buffer 7, but in the former case, the character generator (CG) is accessed and its output controls the brightness. . In the former case, it is necessary to use CG at the stage of storing data on the screen. Displayable partial screen numbers are stored in the partial screen designation buffer 4 when creating or changing a partial screen.

Effects of the Invention In the split screen control method of the present invention described above, a partial screen instruction buffer is provided and the screen is laid out using this buffer, so when displaying the contents of a partial screen on the display screen, it is necessary to judge whether or not it can be displayed. Since it is only necessary to determine whether the output matches the buffer output, there is an advantage that the control is simple and can be performed at high speed.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of a partial screen instruction sofa. In the figure, 1 is an operator console, 2-1 to 2-N are partial screen sofas, 3 is a display control unit, 4 is a partial screen instruction buffer, and 8 is a display screen. Applicant Fujitsu Limited Representative Patent Attorney Minoru Aoyagi

Claims (1)

[Claims] In a control method for a display device that divides the entire display screen into several independent partial screens and displays them, a partial screen buffer that holds information to be displayed on each partial screen and the position of each unit area on the display screen are displayed. and a partial screen instruction buffer that stores partial screens that allow the display, and when displaying the contents of each partial screen buffer on the screen, refer to the contents of the partial screen instruction buffer for each unit area to allow display. A split screen display control method characterized by displaying the screen only when the screen is displayed.