JPS6177090A - 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 [Technical Field] The present invention relates to a display device that displays characters and graphics, and more particularly to a display device that formats and displays data page by page.

[Prior Art] Display devices in conventional word processors symbolize information related to formatting and make it visible, making it impossible to perform formatted input or editing.

Furthermore, since it does not have a display area for the entire page, a separate display screen is required to display the layout.

In order to solve the above drawbacks, a display device called a bitmap display that can display one page's worth of data at high resolution has appeared in recent years. This had the disadvantage that sufficient display response time could not be obtained because it may affect the entire currently displayed page. For example, processing of floating blocks in typesetting depends on the flow of one sentence, and Being pushed into a corner or pushed out to the next page. Therefore, when the position of the floating block is moved to the next or previous page by an editing operation called deletion or insertion, the format and layout of the currently displayed page will be completely different, and the display response time will be slow. There was a drawback.

[Purpose] The present invention has been made in view of the conventional drawbacks, and it temporarily prevents the influence of other pages on the data of the currently displayed page for operations that affect the display, such as adding and inserting. It is an object of the present invention to provide a display device that has a sufficient display response time by suppressing the display time to a maximum of 100% or by displaying the display area beyond the display area.

An object of the present invention is to provide a display device that displays data formatted on a page-by-page basis, which has means for suppressing data movement between pages by adding to, deleting, etc. from the data formatted on a page-by-page basis. .

[Embodiment] An embodiment of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a system block diagram of a personal computer equipped with a display device according to an embodiment of the present invention. In the figure, ■ is a CRT display unit used in the rask scan display method, and 2 is a video RAM (VRA) that stores display pattern information for one screen in a dot matrix.
M), 3 is a display control unit that controls writing of pattern information to the VRAM 2 and reading of pattern information to the CRT.

4 is a microprocessor (MPU) having a main memory 5, which performs main control of the personal computer system and main control of the display device of the embodiment;
, 5 is the main memory, for example, the control procedure shown in FIG. 4 is stored in PMEM, the document is stored in BMEM, and the formatting is stored in FM.
EM, store the cursor position in Cc. Connected to the MPU 4 are a pointing device (FD) 8 for movably specifying a position on the CRT display section 1, and a keyboard 9 for inputting data and commanding typesetting. 6 is a disk device in which a set of character patterns, symbols, and graphic patterns called a font file is stored. And each of these building blocks is MP
It is connected by I10 bus 7 of U4.

FIGS. 2A, B, and C are explanatory diagrams showing the display mode of the embodiment. FIG. 2 shows a one-page formatted document. 10b is a logical display frame called a hanmen.

Now, if the data in the shaded area of 10a is deleted, the result will be as shown in FIG. 2B. This does not typesetting the data on the entire page, but performs font filling and prohibition processing only on the lines that have been edited, resulting in a format like 10c.

Figure 2C shows that a diagonal line of 10d has been inserted into the document in Figure 2A. When inserting data, if the data can be absorbed by one line of typesetting processing, typesetting is performed only on the inserted line. Only. However, when it is no longer possible to absorb it in one line, it is lowered by the last line of the display page, starting from the bottom line.
The character string overflowing into the empty line is displayed with 10e filled in. At this time, 10f is displayed beyond the printing surface lOb. 1
The display of 0f is performed as long as it is physically possible.

FIG. 4 is a block diagram showing the control concept of the display device of the embodiment. Control is mainly performed by the MPU 4, and FIG. 5 is a flowchart showing the execution procedure of the MPU 4.

The operation of the embodiment shown above will be explained with reference to FIGS. 4 and 5.

In step 50, code data consisting of character codes and command codes is read into the memory BMEM in the main memory 5. In some cases).

Step 51 is executed by the page formatting system m4b to display the contents of the memory BMEM for one page according to the format information stored in the formatting FMEM. Specifically, the page typesetting control 4b sequentially retrieves the contents of the memory BMEM, and the line typesetting control 4c performs font filling and cursive processing for each line, while adjusting the balance of the number of characters for each line, page top, page bottom cursing, pillars, and non-pulls. Processing, etc. are performed, the composition format for - pages is adjusted, and the image for one page is transferred to VRAM using the display control 4d.
Expand to. At this time, the display control 4d receives information regarding the code, font, size, and expansion position of each character, and based on that, obtains the character pattern from the font file in the disk device 6 and stores it in the VRAM. Expand to.

From steps 52 to 62, the control means 4a mainly performs the processing.When the data is received from the keypad 9 in step 52, it is tested in step 53 whether or not it is an instruction to end the processing, and if it is not completed, the step The type of input is tested in block 54. If the formatting instruction is for the entire page, the process returns to step 51 to perform formatting processing and display for the entire page. If it is data insertion or deletion, the process moves to step 55, where the line typesetting control 4C performs character filling prohibition processing for the corresponding line, and the display control 4d displays it. In step 56, the data is
A test is performed to see if everything can be displayed on the line, and if it can be displayed, return to input from the keyboard in step 52.
After that, the above-mentioned process is repeated. If it is not displayed,
Move down the next line from steps 60 to 62 one line at a time,
The process moves on to creating an empty row and displaying the overflow of the inserted data there, but if you do this immediately, the next row and subsequent rows will be lowered each time you insert into the same position, and the following rows will be lowered. Steps 57 to 59 are included because empty rows may be created consecutively. First, in step 57, a test is made to see if there is still room for one character sound in the next line, and if there is no room, the process goes to step 60. Whether there is free space or not depends on the number of lines on one page of formatting and the storage capacity of VRAM (
Determined by display capacity Jl). If there is space, in step 58, the overflow data and the data of the next line are combined, the line typesetting control 4C performs character filling prohibition processing for the next line, and the data is displayed on the display side i4d. After that, in step 59, a test is made to see if there is a rash, and if there is a rash, a step 60 is performed.
If not, the process returns to step 52, input processing from the keyboard. In step 60, the process of moving down the next line by one line is performed, and at this time, line number data that increases the number of lines of the page is stored in the formatting information of the memory FMEM.

Such processing can be performed at high speed because it can be performed only by operations on the VRAM without operating the page formatting system J4b. In step 61, the overflow is displayed in single-line typesetting on the empty line, and then in step 6
Step 6 until the overflow is exhausted by the test in step 2.
Repeat 0 and 61.

When the page is enlarged as described above, by moving the cursor to the overflowing line and operating the control key, the display screen can be returned to the screen based on the original format information.

As shown in the control procedure shown in FIG. 5, it is checked whether the control key has been operated. If so, the contents of the cursor memory CC (the cursor is moved on the screen with a pointing device and the contents of the cursor memory change accordingly) are read.

If it is an overflow line (you can tell by the format information)
The contents of the next page including the overflow lines are also stored in the VRAM and displayed. If there is no overflow line, the original -page data is transferred to VRAM and the overflow line is erased from the display.

In the above example, the explanation was about overflow lines, but when the number of lines on one page decreases due to deletion, part of the content of the primary page is transferred to that page.

When displaying an overflow line as described above, the line may be displayed in color. In that case, color information is added to the information to be inserted in the overflow line judgment in Figure 4. Identifies the display information of that page. In that case, it is assumed that the display device is color and has a color identification circuit.

As described above, according to the present invention, for operations that affect the display, such as adding or inserting, it is possible to temporarily suppress the influence on the currently displayed data from other pages, or to change the displayed line. By displaying data beyond the range, it becomes possible to limit the data to be manipulated, which has the effect of shortening the display response time. This has the effect of providing sufficient display response time even if the display speed of the display device is slow.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment according to the present invention.FIG. 2A
, B, and C are diagrams explaining the display mode of the display device. Figure 3 is a diagram explaining the operation of the microprocessor. Figure 4 is a diagram explaining the control procedure of the present invention. Figure 5 is a diagram explaining the control procedure. Memory BMEM Memory FMEM Memory No. 20 (A) (B) (C) Procedural amendment form) February 26, 1985 Patent Application No. 200072 of 1988 2, Invention title display device 3, Person making the amendment Relationship to the incident Patent applicant address 3-30-2 Shimomaruko, Ota-ku, Tokyo Name (100
)Representative of Canon Co., Ltd. Ryu Kaki Part 4, Agent address: 3-30-25 Shimomaruko, Ota-ku, Tokyo 146, Date of amendment order January 29, 1985 (shipment date) 6. Maps subject to amendment face (No change in content)

Claims (1)

[Claims] A display device that displays data formatted on a page-by-page basis, the display device having means for suppressing data movement between pages by adding to, deleting, etc. from the data formatted on a page-by-page basis.