JPS6327953A - Display control system - Google Patents

Abstract

PURPOSE:To accurately recognize the image of the whole of a document with pictures, into which a page is divided, as units by dividing a document page as the printing object into plural pictures and displaying the layout of an optional screen in a compressed display form. CONSTITUTION:When the printing image display mode is set, character information in a designated screen is successively converted to character patterns with rows as units and is developed on a line buffer LB 141. Thereafter, they are converted to character patterns reduced in prescribed dot matrix units and are written in an image buffer V-RAM 140 for display, and the layout of the optional screen in the printing object document page is faithfully displayed in a compressed display form. If the preceding picture is designated when a first picture in the same page is displayed by designating the preceding picture, the last picture of the preceding page is selected, and the layout of this screen is displayed in the compressed display form.

Description

DETAILED DESCRIPTION OF THE INVENTION [Purpose of the Invention (Industrial Application Field) The present invention relates to a display control method for a document creation device, and particularly in a personal type document creation device, it is possible to effectively use the line buffer of a printing mechanism. The present invention relates to a display control method that can be used to faithfully display a Seal III image in layout.

(Prior Art) In recent years, document creation devices have become smaller, lighter, and less expensive by using an LCD (liquid crystal display) for the display mechanism, a micro-floppy disk drive for the document file mechanism, and a thermal transfer printer for the printing mechanism. A document creation device called a personal word processor has now been realized.

In this type of personal word processor, the number of lines and digits that can be displayed at one time on the display screen is significantly limited compared to the number of lines and digits on the printed page. cannot be displayed. Therefore, conventionally, a layout display mechanism is provided which displays a document image of one page in layout by replacing one character with a symbol mark of about one to four dots.

However, with such conventional print image display means, it is not only impossible to distinguish between the characters that make up the document, but also when displaying the layout necessary for document proofreading, etc. Since values, etc. are not reflected, the exact layout cannot be recognized, and the document must be actually typed out to recognize the correct layout.

(Problems to be Solved by the Invention) As mentioned above, in conventional personal word processors, character types are simply displayed as symbol marks, and it is of course impossible to distinguish between the characters that make up a document. Size, character spacing, line feed values, etc. are not reflected, so you can get an accurate document print image! ! ! There was a problem that I couldn't use Xli.

The present invention provides a personal word processor that divides a page to be printed into a plurality of screens by effectively using a display mechanism having a small dot matrix structure with a relatively small number of display line digits and a printing line buffer. To provide a print image display control system configured to faithfully display the layout in units and accurately grasp the image of the entire document in units of divided screens within the page.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides means for dividing and managing document pages to be printed into a plurality of screens when setting a print image display mode, and means for specifying an initial screen, a previous screen, and a subsequent screen for specifying any one constituent screen of the above; page top screen detection means for detecting that the screen specified by the above specifying means is the last screen of the page; page top screen detection means for detecting that the screen specified by the specification means is the page top screen;
means for selecting the last screen of the previous page when the screen before switching is the first screen in a page when switching the screen by the above-mentioned previous screen specification means; means for selecting the first screen of the next page when the screen is the last screen in the page; and a means for reading character type information in the screen specified by the specifying means or selected by the selecting means line by line, forming a pattern, and storing the pattern on the line buffer. means for converting the character type pattern developed on the same line buffer into a reduced pattern in predetermined dot matrix units, and means for developing the converted reduced pattern in a display buffer and displaying it in units of screens. Equipped with
The document page to be printed is divided into a plurality of screens, and any screen is displayed in a faithful layout in a compressed display format.

(Function) When the print image display mode is set, the character information on the screen specified by the above-mentioned specifying means is sequentially converted into a character pattern line by line and developed on the line buffer, and then is converted into a predetermined dot matrix. The unit is converted into a reduced character pattern and written into a display buffer, and an arbitrary screen within the document page to be printed is faithfully displayed in a layout in a compressed display form. Here, when the first screen on the same page is displayed by specifying the previous screen, if the previous screen is further specified, the last screen of the previous page is selected, and the same screen is displayed in a layout in a compressed display format as above. Ru.

By dividing the document page to be printed into multiple screens and faithfully displaying the layout of any screen in a compressed display format, it is possible to display a small number of dots with a relatively small number of display lines in a personal word processor. Matrix configuration display line groove and printing line buffer? It is possible to divide the page to be printed into multiple screens and faithfully display the layout by effectively using the .

(Example) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an apparatus according to an embodiment of the present invention.

In FIG. 1, 10 is a large-scale integrated circuit device made into one chip, and a processing unit (CPU) that controls the entire device.
Furthermore, an internal storage section consisting of ROM and RAM having a dictionary area, character font area, program area, work area, etc. is built-in. This integrated circuit device 10 is actually constructed with a terminal structure of about 100 bins.
This is realized based on the semiconductor integrated circuit technology disclosed in Japanese Patent Application No. 59-204462. Hereinafter, this large-scale integrated circuit device will be referred to as superintegration or SI.

11 to 19 are internal components of the above 5110, respectively. Of these, 11 is the CPU that controls the entire device, and in addition to processing such as manual key recognition, kana-kanji conversion, document editing and proofreading, it also performs line-by-line character decoration according to line attribute information and print stop control. In addition to executing the line modification process including the above, the print image display system a process as shown in FIGS. 2 to 6 is executed. In addition, in the actual machine, this CP
The U il has a logical structure equivalent to 280. Additionally, in the figure, external buses connected to the system bus inside the 5110, connection terminals, and logic such as counters/timers provided inside the 5110 are omitted.

12 to 18 are internal components of 5110 connected to the internal system bus of the CPU 11, respectively.

Of these, 12 are peripheral control circuits (bidirectional interface circuits), and one of the three ports is used to output keyboard scan data (4 bits).
Another boat inputs the keyboard return signal (8
bit).

This peripheral control circuit is hereinafter referred to as PPI.

13 is a decoder (DC) that receives the keyboard scan data output (4 pits) from the PP 112, decodes the data, and sends it to the keyboard as 9 types of scan signals.
E).

14 is a RAM, in which, in addition to a document buffer area, a non-standard character pattern area, a provisional dictionary area, etc., there is also a display image back 7 (hereinafter referred to as V-RAM) 140, a print line buffer (LB) 141, and a print line buffer (LB) 141. Areas such as a work register area 142 including a print control register area (RO to R19) as shown in FIG. 7, and a line modification buffer 143 in which line modification information with a 3-byte/line structure as shown in FIG. 8 is stored. is ensured.

15 is a ROM, in which a kanji pattern storage unit (hereinafter K
PM) is provided, and also stores system programs, a kana-kanji conversion dictionary, messages on multiple screens, and the like.

Reference numeral 16 denotes a line interface unit (C-rNTF) for transmitting document information (character code strings) to and from external equipment under the control of the CPU 11.

17 is an L CD ill 111 circuit (LCDC), and 1.17 in RA'M14. ::lt V-RAM14
0 is accessed and LCD display data is output.

18 is a printer controller (PRTC); c
Print image data is output via the RAM 14 under the control of the p u il.

A clock generator (CG) 19 receives a basic clock output from an external oscillator (O20) 20 and outputs a predetermined frequency-divided clock, timing signal, etc.

20 is an oscillator (O20) that generates a basic clock and supplies it to one clock generator inside 5110, and 30 is a keyboard (KB) connected to PPI+2 and decoder 13 inside the same <5ilo. 50 is the L inside 5110 via the LCD driver (LCD-DRV) 51.
This is a liquid crystal display (hereinafter referred to as LCD) connected to the CD control circuit 17, and here, as shown in FIG. 10, it displays 10 lines x 40 characters (20 lines x 80 characters in N small mode) It has a possible 640 x 200 dot configuration. 60 is a serial printer connected to the printer controller 18 inside the 5IIO. 70 is a 3.5 inch micro floppy disk drive (F[)D), which is connected to the internal system bus of CP [J 11 inside 5IIO via a floppy disk controller (FDC) 71. This floppy disk drive 70
A document floppy disk for storing documents, a custom character floppy disk for storing custom characters, a second level floppy disk storing each second level kanji pattern, etc. are selectively inserted into the floppy disk.

2 to 6 are O-charts each showing the print image display processing flow executed under the control of the CP Ll 11, and FIG. 2 shows the processing flow of the entire print image display processing system. It is a flowchart.

FIG. 3 is a flowchart showing the paper width scale display process (step 33) in the process shown in FIG.

FIG. 4 is a flowchart showing the process (step 86) of calculating the number of display lines from the clipping range in the process shown in FIG.

FIG. 5 is a flowchart showing the display process on the CD 50 (step 510) in the process shown in FIG.

FIG. 6 is a flowchart showing the write process to the V-RAM 140 (step C25) in FIG. 5 above.

FIG. 7 shows the work collection register area 14 in the RAM 14.
Registers (R
In addition to those shown here, there are also several working registers (IXl'eg.

Brell, DEreg, BCrefll, etc.)
is used for print image display processing.

FIG. 8 shows the structure of the row modification information stored in the row modification buffer 143 in the RAM 14.
Consists of bytes/row.

FIG. 9 shows the configuration of the printing line buffer (LB) 141. Here, during normal use, that is, during printing, it is configured with a width of 1,536 dots, but the print image During display processing, the width is expanded to 2.280 dots (see FIG. 11).

FIG. 10 shows the configuration of the V-RAM 140, which here includes 640×200 dots.

FIG. 11 is a diagram showing the displayable range on the LCD 50 and dotted lines of paper width when displaying a print image. Here, the left edge of the paper, the right edge of B5 portrait, the right edge of A4 portrait, and the right edge of B4 portrait , and the right edge of B4 are each displayed as a guide with a one-dot dotted line.

Figure 12 shows the clipping range of the LCD 50 (here 2
00 dot), and FIG. 13 is a diagram showing the relationship between the document and the screen when displaying the print image.
Screens can be switched by operating the cursor in the up and down directions.

Here, the operation of one embodiment will be explained with reference to the above figures.

When inputting a sentence containing kanji, the key input signal from the keyboard 30 is sent to the CPU 11 in the 5IIO.
The data is converted into kana-kanji under the control of , and stored in the document buffer 141 in the RAM 14. At this time, the CPU 11 outputs a scan signal to the keyboard 30 via the PP 112 and the decoder 13, and sends the return signal to the P
P112 is input to perform key discrimination and generate a key code. Furthermore, regarding the designated part of the kanji that was manually inputted using the same key code, (7) KPM (
Kana-kanji conversion dictionary! >, and further indexes a temporary dictionary in the RAM 14, performs kana-kanji conversion processing, and stores an input character code string including the converted kanji code in the document buffer 141.

During the above-described document input, the input characters stored in the document buffer 141 are sequentially stored in the V-
The pattern is developed on the RAM 140 and the LCD control circuit 1
7 and the display drive of the LCD driver 51 to output the data to be displayed on the LCD 50.

The already input document input in this way is arbitrarily displayed on the LCD 50 in a character arrangement of up to 40 columns x 10 lines (80 columns x 20 lines in the reduced display mode) according to the line/column specification using the cursor keys. It can be used for document editing, proofreading, etc.

For example, if you want to modify characters on a line-by-line basis or specify to stop printing for the above input document, select and display the character string at the line position you want to modify using the cursor keys,
[Line I by combination of function key and other specific keys
I] Specify line modification by key operation. The detailed line modification means at this time is shown in Japanese Patent Application No. 129237/1988 (Document Creation Apparatus), so the explanation thereof will be omitted here.

The print image display processing operation will be explained below.

Here, during print image display processing, the normal printing result of a document in which multiple types of characters are mixed in line units is displayed as [1
The layout is displayed on the LCD 50 as an image reduced to 4x1/4].

First, line modifications such as character size, character spacing, line feed value, and paper exchange are specified for each line of a document input from the keyboard.

When the "print image display" key on the keyboard 30 is pressed here, the CPU 11 detects the line number of the line where the cursor is located, and then starts executing a print image display execution routine.

The display processing operation of the print image at this time is shown in Figures 2 to 1.
This will be explained with reference to FIG.

First, the entire processing operation for displaying a print image will be explained with reference to the flowchart shown in FIG.

Here, first, in step S1, the contents of the line modification above the cursor line detected upon pressing the "print image display" key are checked, and the line number of the line in which paper replacement is specified is detected; Register R with the accompanying number as the first line number of the page
Set to O.

Next, in step S2, "○" is set in the print control register R1 as a clipping dot indicating the clipping range.
(Hereinafter, each of the print control registers (RO to R19) will be simply referred to as a register). Thereafter, in step $3, the paper width scale is displayed on the LCD 50 as shown in FIG. This detailed processing flow is shown in FIG.

Next, in step S4, the character position for displaying the image is "4" (specifically, a margin of 4 dot slices to prevent side lines etc. during portrait/horizontal conversion printing).
is set in register R2, and then in step S5, the contents of register RO are set in register R3 as the search line number. Then, in step S6, the number of display lines is determined from the clipping range. This detailed processing flow is shown in FIG.

Next, in step S7, if the number of display lines is "0", then in step S13, the next screen and one screen after another are designated as the clipping range, and it is determined whether there are any display lines.

If it is determined in step 813 that there is no display line, then in step 822 a page end mark as shown in screen 3 in FIG. 13 is displayed at the lower left of the screen.

Further, in step S7, if the number of displayed lines is other than "○", in step S8, the number of displayed lines (R17
) is set in the work register 8 Crea, and the display start line number (R7) is set in the work register DE in step S9.
Display the print image on the CD 50. This detailed display flow is shown in FIGS. 5 and 6.

Next, in step S11, the contents of register R17 (
The value obtained by adding the display line number) and the contents of register R7 (display start line number) is set in register R3 as the next search line number.

Next, in step 812, the search end flag (R4
) is “1” or not, and if it is not “1”,
The process returns to step 6 again to calculate the number of display lines.

Also, in step S12 above, the search end flag (
If R4 is "1H", in step 313, the same page end check as above is performed.

In this step 313, if there is no line to be displayed, in step S22, a page end mark as described above is displayed at the lower left of the screen, and in step S23, the key is displayed.

Also, if there is a display line in step $13 above,
Becomes a key force in Slap S14.

Here, if there is key power, the key is determined in steps 815 to 817, and if it is the upper cursor key, the process of step 318 is executed, and if the lower blade - cursor key is the key, the process of step 821 is executed. , when the cancel key is pressed, the print image display is ended.

If it is any other key, the key waits again in step S14.

When the input of the up cursor key is determined in step 815, it is determined in step 818 whether or not the clipping dot (R1) is rOJ (displaying on the first screen), and if it is "0", Then, in step 819, it is determined whether the page top row number (RO) is "1" (the first page is being displayed), and if it is "1", then in step 814, the key manually There will be a wait.

Also, in step S19 above, the page top line number (RO
) is not "1", the previous page final screen display process is performed in step 832.

If the clipping dot is not "0" in step 818, r700J is subtracted from the clipping dot (R1) in step 820, and the process in step S3 is performed to display the previous screen.

Also, when waiting for key personnel in step 823 above,
If the key is pressed manually, the key is determined in steps 324 to 826. If the cancel key is pressed, the print image display is ended, if the up cursor key is pressed, the process of step S29 is executed, and if the down cursor key is pressed, the process of step S29 is executed. is step 827
At step 823, it is determined whether or not it is the end of the sentence, and if it is the end of the sentence, the process returns to step 823 where the key is activated. If it is not the end of the sentence, the first line number of the next page is set in the page first line number (RO), and the process of step S2 is performed to display the first screen of the next page.

In step S29, it is determined whether or not the clipping dot (R1) is rOJ. If rOJ, then in step S30, the first row number of the page (RO) is determined.
It is determined whether or not is "1", and if it is "1" here, the key manpower is determined again in step 323.

Further, in step 829, if the clipping dot (R1) is not rOJ, in step S31, subtract r700J from the clipping dot (R1),
In order to display the previous screen, the process of step S3 is performed.

Also, in step S30 above, the page top row number (RO
) is not "1", in step 832, the line number of the first line of the previous page is set in register RO, and in steps 833-S25, register R1 is set to "0", register R2 is set to "4", The values of register RO are set in register R3. Then, in step 336, the number of displayed lines is deleted.

This detailed processing flow is shown in FIG.

Next, in step 837, the search end flag (R
4) is "1".

When the search end flag (R4) is "1", it is determined in step 341 whether or not this is the last screen of the previous page, and if it is the last screen, the process of step S3 is performed. Also, if it is not the final screen, steps 842 to 84
In the process of step 4, r700J is added to register R1 (clipping dot), the contents of register R6 (display start character position) are set to register S2, and register R
The contents of register R7 (display start line number) are set to 3, and the process returns to step 336 again.

Further, in step 837, if the contents of register R4 (search line number) are not "1", step 83
In step 8, it is determined whether the number of display lines (R17) is rOJ or not, and if it is rOJ, the process of step 842 is performed. Also, if the number of display lines (R17) is not "0",
In step 839, it is determined whether or not it is the last screen of the previous page. If it is the last screen, r700J is subtracted from the contents of register R1 and the process of step S3 is performed again. Also, if there is no Hiiragi screen, set r70 to register R1.
0'' is added and the process of step S34 is performed.

Next, steps 33.86 and 336. The details of SIO will be explained according to the flowcharts of FIGS. 3 to 5.

FIG. 3 is a detailed flowchart of the [paper width scale display process] in step S3 in FIG. 2 above.

Here, first, in step A1, all the display screens of the LCD 50 are cleared, in step A2, NOOJ, which is the number of dots on the dotted line, is set in the work register 3reg, and in slap A3, the work register IXreg is set to V - Odd number start address of RAM 140 (here 80
0H).

Next, steps A4, A5, A6, A7
, execute each process of A8 to create V-RAM 140
1 for each dotted line address shown in Figure 11 above.
Or write Pitsuto.

After that, in step A9, the working register I
``80'' is added to reg, and ``1'' is subtracted from the work register 3 reg. If the result is not rOJ, the process from step A4 onwards is repeated, and if it is ``0'', the process is terminated.

As a result of such processing, the dotted lines on the LCD 50 as shown in FIG.
1 right edge, 84 m right edge, and B4 horizontal right edge.'' A scale display of each paper width is performed.

FIG. 4 shows step 86 in FIG. 2 above. This is a detailed flowchart of the process of determining the number of display lines from the clipping range in step S36.

First, in step B1, the contents of register R4 are set to "O", and in step B2, the contents of register R3 (search line number) are set in register R5.

Next, in step B3, the value of register R2 is set to 1/1.
Convert from 20 inch units to dot units and register R18
Set to .

And step B4. In the BS, the value of register 818 (character position dot) is the clipping dot (R1).
to determine whether it is within the range of [R1+800],
If it is within that range, the process of step B10 is performed.

If the line is outside the range in step B5, it is determined in step B6 whether or not the line is a paper exchange line, and if it is a paper exchange line, the display line is changed in step SB7. The number (R17) is set to "0" and the process ends. If it is not the paper exchange line, "1" is added to register R5 in step B8, a line feed value is added to register R2 in step B9, and the process returns to step B3.

If the clipping range is determined to be outside the clipping range in step B5, the clipping range is set in register R2 in step B10.
The content (character position) is set in register R6 as the display start character position, "1" is set in register R17 as the number of display characters in step 311, and the content of register R1 (clipping dot) is set in step B12. Convert to 1/120 inch unit and register R
2 from the contents (character position) and set the value in register R8 as the line feed position. Further step [313
At this point, the contents of register R5 are set in register R7 as the display start line number.

Next, in step B14, a line feed value is added to register R2, and in step 815, the contents of register R2 are changed to 1/
Convert from 120 inch units to dot units and set in register R18. And step B16. B17
In this case, the value of register R18 becomes the clipping dot (
R1) to mouth R1+800], and if it is within the range, "1" is added to register R17, and then the process returns to step 314. Also, in step B17 above, if it is outside the range, step B18
At step B19, it is determined whether or not it is a paper exchange line, and if it is a paper exchange line, "1pa" is set in the search end flag (R4), and the process is terminated.

Also, if it is not a paper exchange line, the process is immediately terminated.

Figure 5 shows the [LCD] of step SIO in Figure 2 above.
50] is a detailed flowchart of the display processing on the screen 50.

First, in steps CI and C2, the print image flag (R9) is set to "1", and the line buffer length (R10) is set to r2280J (see FIG. 9).

In the case of normal printing, in steps C3 and C4, register R9 (print image flag) is set to "0", register R
N536J (see Figure 9) is set in IO.

Next, in step C5, the contents of the work register D E rea are set in the row number (R5), and in step C6, the contents of the work register B E rea are set in the row number (R11).
Set the contents of. Then, in step C7, line break 11 (
R14) is set to "0". Furthermore, in step C8,
Line modification information corresponding to the line number in register R5 is set in the row modification area (R16), and in step C9, character size, character spacing, and line feed value are calculated from the values in register R16. Next, in steps C10 and C11, rOJ is set in register R12 and register R12, respectively.

Next, in step C12, the corresponding character code is loaded from the contents of register R5 and register R13.

Then, in step C13, it is determined whether the character code is a character type stored in external storage. Here, if the character type is not in the external memory, in step 016, the RO
A character pattern according to the code is read from the KPM of M15 and written to the character buffer (R19). Also, in step C13, if it is determined that the character is an externally stored character (in this case, an external character accessed by the microfloppy disk drive 70, or a character type stored in the second level dedicated floppy disk), In step C14, it is determined whether the print image flag (R9) is 1'°, and if it is "1", all bits of register R19 are set to "1'°" in step C15. .

In this way, during print image display processing, the pure black pattern is displayed in the character buffer (R1
9) and expanded onto the line buffer (18) 141.

A display example of this pure black pattern is shown in screen 1 of FIG. 13.

Further, when the print image flag (R9) is "0", a character pattern (external character/second level Chinese character, etc.) is read from an external storage (micro-floppy disk drive 70) and written to register R19.

Next, in step C18, character modification m<for example, enlargement processing is performed according to the contents of the line modification information in register R16.
Transfer the character pattern to the line buffer (LB) 14
Write to 1.

Then, in the next step C19, the character size value is added to the contents of register 12 (write pointer), and in step C20, the contents of register R12 (write pointer) exceeds the line buffer length (R10). If it is determined that the number of characters for one line has been written, or that writing of the number of characters for one line has been completed, the print image flag (
The contents of R9) are determined.

Also, in step C20, if the value of register R12 (write pointer) does not exceed the line buffer length (R10), in step C21, add the character spacing to register R12 (write pointer), and then In step C22, "1" is added to register R13 (digit number), and the process returns to step C12.

In step C23 above, the print image flag (R9)
It is determined whether or not is "1", and if it is "1", the value (line feed amount) of register R14 is added to the line feed position (R8>).

Then, in step C25, the line buffer (LB
) 141 data is written to ■-RAM 140.

Further, in step C23, if the contents of the register R9 (print image flag) are not "1", the printer (P
RT) 60, line feed and printing are performed.

Next, in step C26, the information in register R16 (
Find the line feed value from the line modification area), do this, and set the register R1
Set to 4. Then, in step C27, "1" is added to the contents (line number) of register R5, and in step C2
At step 9, "1" is subtracted from the contents (number of lines) of register R11. Furthermore, in step C30, it is determined whether the contents (number of lines) of register R11 is "○", and rOJ
If not, return to step C8, and press "○" again.
When this happens, the process ends.

FIG. 6 shows the [V-R
[Write processing to AM 140]] is a detailed flowchart.

Here, first in step D1, the line break position (R8
) from 1/120 inch units to dot units. Next, in step D2, it is determined whether the value of register R8 (line feed position) is within the range from rOJ to r799J, and if it is outside the range, the process of step D5 is performed. If it is within the above range, the value of register R8 is 1/4 and set in the V-RAM Y position (R15). Then, in step D4, 4 dot data of ○ to 3 dots from the top on the line buffer (LB) 141 are 1/4 x 1/
4 (if any dot of 16 dots (4×4 dot matrix) is “1N,” the reduced data is “1”) and the X position r32J of the V-RAM 140 is
(unprintable range shown in Figure 2), y position is register R1
The reduced data is or-written from the position indicated by 5 (CV-RAM Y position).

Next, in step D5, "4" is added to the value of register R8 (line feed position), and in step D6, register R
It is determined whether the value of 8 is within the range from "0" to r799J, and if it is outside the range, the process of step D9 is performed.

Also, if it is within the above range, the value of register R8 (line break position)
is set to 1/4 in register 15. Then, in step D8, the data of 4 to 7 dots from the top on the line buffer (LB) 141 is reduced to 1/4 x 1/4, and the X position on the V-RAM 140 is r32J, and the Y position is in the register R15. Or write reduced data from the value.

Next, in step D9, I'4J is added to register R8, and in step D10, the value of register R8 becomes "0".
It is determined whether or not it is within the range of r799J. Here, if it is outside the range, the process of step [)13 is performed. If it is within the range, the value of register R8 is 1/4 and set in register R15.

Then, in step D12, the line buffer (L
B) Bootara 1 of 8 to 11 dots from the top on 141
/ '4

Next, in step 1)13, "4" is added to register R8, and in step [)14, the value of register R8 is "
It is determined whether or not it is within the range of r799J from "○", and if it is outside the range, the process of step D17 is performed. Also, when it is within the range, the value of register R8 is set to 1, /4 and set in register 15. Then, in step D16, the data of 12 to 15 dots from the top on the line buffer (LB) 141 are divided into 1/4 x i/4.
"X position r32" of RAM 140, Y position is register R1
Or-write the reduced data from the value of 5.

Next, in step [)17, "4" is added to register 8, and in step D18, the value of register R8 is set to rOJ.
It is determined whether or not it is within the range of r799J, and if it is outside the range, the process of step D21 is performed. Also, if it is within the range, the value of register R8 is 1/4 and the value of register R1 is
Set to 5. Then, in step D20, the data of 16 to 19 dots from the top on the line buffer (LB) 141 is reduced to 1/4 x 1/4 and stored in V-RA.
X position r32J on M140, Y position is register R1
Or-write the reduced data from step 5.

Next, in step D21, r4J is added to register R8, and in step D22, the contents of register R8 are changed to "0".
”, it is determined whether or not it is within the range of r799J, and if it is outside the range, the process is terminated. If it is within the range, the value of register R8 is 1/4 and set in register R15.

Then, in step 024, the line buffer (LB)
1/4 of the data of 20 to 23 dots from the top on 141
X Reduced to 1/4, V-RAM140f7)
At position r32J and Y position, reduced data is OR-written from the value of register R15, and the process ends.

In this way, the print image display process is executed sequentially,
The print image is displayed on the LCD 50 in a compressed character pattern display format that is faithful to the actual printed document.

[Effects of the Invention] As described in detail above, according to the present invention, in a document creation device having an n-line x m-column display buffer, a printing line buffer, and a line modification function, it is possible to change the print image display mode. A mode setting means to be set, a means for dividing and managing a document page to be printed into a plurality of screens in a print image display mode set by the same means, and an arbitrary configuration screen within the document page. means for specifying an initial screen, means for specifying a previous screen, means for specifying a subsequent screen, means for detecting a page top screen for detecting that the screen specified by the above specifying means is the last screen of the page; A page top screen detection means for detecting that the specified screen is the page top screen, and when the screen before switching is the first screen in the page when the screen is switched by the previous screen designation means, the R Hiragi screen of the previous page is detected. means for selecting the first screen of the next page when the screen before switching is the last screen in the page when the screen is switched by the second screen specifying means; means for reading out the character type information on the screen selected line by line and developing it into a pattern on the line buffer; and means for converting the character type pattern developed on the line buffer into a reduced pattern in a predetermined dot matrix unit. , and means for expanding the converted reduced pattern into the display buffer and displaying it on a screen-by-screen basis,
By dividing the document page to be printed into multiple screens and faithfully displaying the layout of any screen in a compressed display format, a display mechanism with a small dot matrix configuration with a relatively small number of display lines and printing can be achieved. By effectively using the line buffer, the layout of the page to be printed can be faithfully displayed on multiple screens, and the image of the entire document can be accurately grasped in units of screens into which the page is divided.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of an apparatus in an embodiment of the present invention. 2 to 6 respectively show the print image display processing flow in the above embodiment. The second cause is a flowchart showing the processing flow of the entire print image display processing system, and FIG. FIG. 4 is a flowchart showing the paper width scale display process (step S3) in the process in FIG. 2, and FIG.
6), FIG. 5 is a flowchart showing the display process on the LCD (step 510) in the process in FIG. 2 above, and FIG. 6 is the V-R in FIG. 5 above.
It is a flowchart which shows the write process to AM (step C25). 7 to 13 are for explaining the operation of the above embodiment, and FIG. 7 shows the registers (RO-R19) of the print control register area provided in the working register area of RA-1. ), FIG. 8 is a diagram showing the configuration of line modification information stored in the row modification buffer in the RAM,
Figure 9 shows the configuration of the print line buffer (LB), Figure 10 shows the configuration of the V-RAM, and Figure 11 shows the displayable range on the LCD and paper width when displaying the print image. FIG. 12 is a diagram showing the dotted line, FIG. 12 is a diagram for explaining the clipping range on the LCD, and FIG. 13 is a diagram showing the relationship between the document and the screen when displaying a print image. 10...Sl, 11...CPU, 12...PPI
(peripheral control circuit), 13... decoder (DCE), 1
4...RAM, 15...ROM, 16...Line interface section (C-INTF) 17.LCDll
tll circuit (LCDC), 18... Printer controller (PRTC), 19... Clock generator (CG), 20... Oscillator (O20), 30... Keyboard (KB), 50...・LCD, 60... Serial printer (PRT), 70... Floppy disk drive (FDD), 71... Floppy disk controller (FDC>, 140... Display image buffer (V-RAM), 141 ...Line buffer (LB) for printing, 142...Register area for work, 143...Line modification buffer 143゜Applicant's agent, patent attorney Takehiko Suzue Print image display Paper width scale display Figure 3 Click/ Figure 4 (button) Figure 9 Figure 10 Figure 10 Unprintable area LCD horizontal direction O dot: indicates left edge of paper 1 dot dotted line 321 dot: indicates 8S vertical right edge Tl dot・Dotted line 373 dots 2 Indicates the vertical end of BSS! Dotted line 4s6
Dot: B4 1 dot indicating the vertical right edge 639 dots: 84 Horizontal right edge Tt dot dotted line Lc D'iii Surface format Figure 11 Clipping range on LCD Figure 12

Claims (2)

[Claims] (1) In a document creation device that has an n-line x m-digit display buffer, a printing line buffer, and a line modification function,
mode setting means for setting a print image display mode;
means for dividing and managing document pages to be printed into a plurality of screens in a print image display mode set by the means; and means for specifying an initial screen for specifying any constituent screen within the document page; a means for specifying a previous screen; a means for specifying a next screen; an end-of-page detecting means for detecting that the screen specified by the above-mentioned specifying means is the last screen of the page; page top screen detection means for detecting that the screen is the first screen of the page; means for selecting the last screen of the previous page when the screen before switching is the first screen in the page when the screen is switched by the previous screen specifying means; means for selecting the first screen of the next page when the screen before switching is the last screen in the page when switching screens by the screen designation means, and the character type in the screen designated by the designation means or selected by the selection means; means for reading and patterning information line by line and developing it on the line buffer; means for converting the character type pattern developed on the line buffer into a reduced pattern in units of a predetermined dot matrix; and the converted reduced pattern. A display control system comprising means for expanding the data into the display buffer and displaying it on a screen-by-screen basis. (2) The display control system according to claim 1, wherein a specific mark indicating the end of a page is displayed at a fixed position on the end of page screen detected by the end of page screen detection means.