JPH0592620A - Outputting system for reduced data - Google Patents

Abstract

PURPOSE:To make printing or display available with reduced dot data without employing a specific dot density conversion circuit by utilizing difference in density of dots between output control apparatuses such as a printing control device or a display control device and output apparatuses such as a printing device or a display device. CONSTITUTION:In a printing control apparatus 20, printing data sent from an upper unit are expanded in the density of 240dpi with a control section 21 and are stored in a full dot memory section 22. Contents of the full dot memory section 22 are then sent out to a printing device 30 on its printing cycle. Dot data sent from the printing control apparatus 20 are printed with the printing device 30 in the density of 480dpi. Therefore, the printing data for a full four-page expanded in dot expansion with the printing control apparatus 20 can be printed with the printing device 30 into one page with the area of the expanded data reduced to one fourth.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data reduction output system, and more specifically, it reduces data of a plurality of pages or a plurality of screens from a host device into one page or one screen and prints it on a printing device or a display device. Regarding the display method.

[0002]

2. Description of the Related Art Conventionally, in a printing system or a display system, when print data or display data is reduced and outputted, a dot density is applied to a print control device or a display control device which develops dots of print data or display data from a host device. This has been realized by using a conversion circuit or by changing the data size to a smaller one by software in an information processing device which is a higher-level device. The dot density conversion circuit is described, for example, in "Data Density Conversion Circuit" of Japanese Patent Laid-Open No. 1-259963.

The above-mentioned prior art requires a complicated dot density conversion circuit in the print control device or the display control device when printing or displaying data in a reduced size, or a higher-level device. The problem is that it puts extra strain on the software.

In recent years, the printing dot density of printing apparatuses has tended to increase, and high-definition printing has become possible. For example, a printing apparatus capable of printing 480 dpi has come to be provided in comparison with a device which conventionally prints 240 dots / inch (hereinafter referred to as “dpi”). In this case, the 240
The print data of dpi is 480 without changing the density.
When printed with a dpi printing device, it is reduced to 1/4 and printed. The same applies to the relationship between the display control device and the display device.

The object of the present invention is to utilize the dot density difference between the print control device and the printing device or the display control device and the display device without the need for a complicated dot density conversion circuit, and for the upper device. An object of the present invention is to provide a method for reducing data for a plurality of pages or a plurality of screens to one page or one screen and outputting the data without burdening the software.

[0006]

In order to achieve the above object, the invention of claim 1 is an output control device of a print control device or a display control device for dot-developing data from a higher-level device, and the output control device. In a data output system comprising a printing device and an output device of a display device for outputting dot-developed data, the output control device is configured such that the output dot density of the output device is N times the dot development density of the output control device. That is, the dot expanded data is reduced by 1 / N × N and output from the output device.

According to a second aspect of the present invention, in the output control device,
Equipped with one full-dot memory with a capacity to store dot expanded data for N × N pages or N × N screens,
Data of N × N pages or N × N screens which are dot-developed in the full dot memory are stored and sent to the output device, and the output device reduces and outputs to one page or one screen. Is.

According to a third aspect of the present invention, in the output control device,
The full dot memory having a capacity capable of storing dot expanded data for one page or one screen is provided in N × N, and the dot expanded data for one page or one screen is stored in each full dot memory to the output device. Send out,
The output device reduces the data of N × N pages or N × N screens to one page or one screen and outputs it.

[0009]

According to the present invention, an output device of a printing device or a display device having a dot density N times higher than the dot expansion density of the output control device of the print control device or the display control device is used. By sending the above data to the output device as it is in the dot output cycle, the data for N × N pages or N × N screens is reduced to one page or one screen and output from the output device.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings using a printing system as an example.

FIG. 1 is a block diagram of a printing system according to an embodiment of the present invention. In FIG. 1, 10 is a host device as an information processing device, 20 is a print control device, 30 is a printing device, and the print control device 20 comprises a control unit 21 and a full dot memory unit (FDM unit) 22. Print control device 20
Print data sent from the higher-level device 10 is expanded into a dot pattern by the control unit 21 at a predetermined dot density (hereinafter, 240 dpi) and stored in the FDM unit 22. Send to 30. The printing apparatus 30 uses the dot pattern data sent from the print control apparatus 20 as its dot density (hereinafter, 480 dpi).
And) to print on printing paper.

Here, FIGS. 2A and 2B respectively show examples in which print data of vertical 4 dots × horizontal 4 dots is printed at 240 dpi and 240 dpi. Comparing FIG. 2A and FIG. 2B, the same print data printed at 480 dpi as shown in FIG. 2B has an area ratio higher than that at 240 dpi shown in FIG. 2A. At 1/4
It will be reduced. Therefore, the print data for four sheets of A4 size paper at 240 dpi shown in FIG. 2C can be printed on one sheet of A4 size paper at 480 dpi as shown in FIG. 2D.

In FIG. 1, print data for four pages of A4 size paper sent from the higher-level device 10 is dot-developed with a dot density of 240 dpi by the print control device 20, and A4 with a dot density of 480 dpi by the printing device 30. When printing on one page of size paper, the following two methods can be considered as the configuration of the FDM unit 22 in the print control device 20. The first method is A4 size 4 at 240 dpi.
Prepare one full dot memory (FDM) capable of storing dot-developed print data for each page, divide the FDM into four, and store each dot-expanded data of pages 1 to 4 in each divided area. Then, the contents of the FDM are sequentially read from the top row and sent to the printing apparatus. This is the first embodiment. The second method is A at 240 dpi.
Prepare four FDMs (four sides) capable of storing dot-developed print data for one page of 4-size paper, store each dot-developed data of pages 1 to 4 in each FDM, and This is a method of continuously reading the contents in two FDMs and sending them to the printing apparatus. This is a second embodiment. Hereinafter, the first and second embodiments will be described in detail.

First, the first embodiment will be described. FIG. 3 shows the configuration of the FDM unit 22 of this embodiment. In FIG. 3, the FDM 110 can store the dot-developed print data for 4 pages of A4 size paper at 240 dpi, and the four divided areas 111 to 114 in the FDM 110 can be stored.
Stores print data in which dots are expanded for one page of A4 size paper at 240 dpi. In this example,
The paper should be in landscape orientation. FDM11
Writing to 0 and reading are performed in word units (1 word = 4 bytes). The size of A4 size paper is 1
It is 1.7 inches by 8.3 inches, and each divided area 111 to
The memory size of 4 is 88 words in the X direction (= [11.7
Inch x 240 dpi] / [rounded up value of [8 bit x 4 Byte]), Y direction is 1992 bit (= 8.3 inch x)
240 dpi). That is, the X direction address of the divided area (1) is 0 to 87 words, and the Y direction address is 0 to 1
921, the X-direction address of the divided area (2) is 88 to 175.
The word and Y-direction addresses are 0 to 0 as in the divided area 111.
1921, divided area (3) has an X-direction address of 0 to 87 words, a Y-direction address of 1922 to 3983, and a divided area
The X-direction address of (4) is 88 to 175 words, and the Y-direction address is 1922 to 3983. In the entire FDM 110, the address in the X direction is 0 to 175 words, and the address in the Y direction is 0.
~ 3983.

The print data for four pages sent from the higher-level device 10 in page order is sequentially 240 by the control unit 21.
The dots are rasterized in dpi and stored in each of the divided areas 111 to 4 in the FDM 110. Dot expansion of print data in the control unit 21 and FDM1 of dot expanded print data
Writing to 10 is performed by a microprogram (hereinafter abbreviated as μP) of the control unit 21. When writing the dot-developed print data into the FDM 110, the μP writes each page into the divided areas 111 to 4, respectively. Where μ
P sets a write address to the X address register 140 and the Y address register 150 in the FDM section 22 by a circuit not shown, and then writes the dot expanded print data to the FDM 110. When writing the print data, both the clock signals CLKA and CLKB are stopped.

FIG. 4 shows a flow chart of setting the write address by the μP to the X address register 140 and the Y address register 150. For μP, the print data write destination is FDM1
Any of the divided areas 111 to 114 of (1) to (4) in 10 is determined. In this embodiment, it is assumed that pages 1 to 4 of print data are sequentially written in the divided areas 111 to 4. Divided area (1)
For writing to 111, μP is X base address, Y
The base address is 40, the X-direction address of the FDM 110 is 0 to 87 words, and the Y-direction address is 0 to 19 words.
The write address is set in the range of 91 and the print data of the first page is written. Next, for writing to the divided area (2) 112, the μP sets the X base address to 88 and the Y base address to 0, and the X direction address of the FDM 110 is 88 to 175 which is obtained by adding 0 to 87 to the X base address value 88. The write address is set by setting the word in the X direction range and the Y direction address by setting the write address in the Y direction range of 0 to 1991 obtained by adding 0 to 1991 to the Y base address value 0, and the print data of the second page is written. Next, for writing to the divided area (3) 113, the μP sets the X base address to 0 and the Y base address to 1992, and the X direction address of the FDM 110 is X.
The range of 0 to 88 words obtained by adding 0 to 87 to the base address value 0 is set as the range in the X direction, and the Y direction address is 1992 to 398 obtained by adding 0 to 1991 to the Y base address value 1992.
The write address is set with the range of 3 in the Y direction, and the print data of the third page is written. Last division area (4) 11
4 writes the X base address to 88,
The Y base address is 1992, the X direction address of the FDM 110 is 88 to 175 words obtained by adding 0 to 87 to the X base address value 88 in the X direction range, and the Y direction address is 0 to 1991 for the Y base address value 1992. A write address is set with the added 1992 to 3983 as a range in the Y direction, and the print data of the fourth page is written.

When all dots of the print data for four pages are expanded and stored in the divided areas 111 to 114 of the FDM 110, the control unit 21 instructs the FDM unit 22 to perform the FDM 11 operation.
It is instructed to read the dot data in 0 and send it to the printing device 30. The FDM 110 is read out in units of 4 Bytes in the raster scanning direction of the printing apparatus 30 (X direction of the FDM 110).

When reading the FDM 110, it is assumed that the X address register 140 and the Y address register 150 are all initially cleared to zero. Since both the X address register 140 and the Y address register 150 are zero, the address circuit 160 outputs (0, 0) (= contents of the X address register 140, contents of the Y address register 150). This gives (0,0) of FDM110
4 bytes starting from the address read register 120
And is sent to the printing device 30 as serial dot data by the parallel-serial conversion circuit 130. Here, the X address register 140 and the Y address register 150 respectively use the clock signal CLKA as the update timing, and further, the X address delay register 141 which is the delay register of the X address register 140 and the Y address delay register which is the delay register of the Y address register 150. 151 are clock signals CL
KB is used as a trigger signal. The phase relationship between CLKA and CLKB is shown in FIG. The read timing of the FDM 110 and the read timing of the read register 120 are CLKB.

4 from the (0,0) address of the FDM 110
After reading Byte data, X address register 1
Only 40 is sequentially updated, and the first raster data of the FDM 110 is read out. X-MAX register 143, Y-M
The AX register 153 stores A4 size paper at 240 dpi.
Shows the paper size when dots are expanded. In this embodiment, the paper is in the landscape direction (landscape), and the X direction is X-MAX = 175 words (= {[(11.7 inches ×
Roundup value of 2 ×× 240 dpi) / (8 dpi × 4 Bytes)} − 1), and Y-direction is Y-MAX = 3983 raster (= [8.3 inches × 2 ×× 240 dpi] -1).

The FDM 110 has an X address register 140.
Are sequentially updated by +1 by the +1 circuit 142, and reading is performed in the X direction. X address delay register 1
The contents of 41 are compared with the contents of the X-MAX register 143 by the X comparison circuit 144, and the X address delay register 1
The FDM 110 is continuously read in the X direction until the contents of 41 match the contents of the X-MAX register 143. X
When the contents of the address delay register 141 match the contents of the X-MAX register 143, the X match signal 145 becomes a logic "1", and the AND circuit 147 causes the CLKA and AN to operate.
Then, the X address register 140 is zero cleared. As a result, all the data of the first raster stored in the FDM 110 is read out and sent from the parallel-serial conversion circuit 130 as parallel-serial dot data to the printing device 30 via the read register 120. At this time, the Y address delay register 15
Since the content of 1 is 0 and does not match the content of the Y-MAX register 153, the Y match signal 155 which is the output of the Y comparison circuit 154 is logic "0" and the X match signal 145 is logic "1". Yes, AND circuit 156 is AN with CLKA
The D condition is satisfied, and the Y address register 150 is updated by +1. When the content of the Y address register 150 becomes 1,
Similar to the case where the content of the Y address register 150 is 0, the X address register 140 is sequentially updated, and the reading in the X direction is performed by the FDM 110. Further, when the X address register 140 becomes X-MAX, the second address of the FDM 110 is
All the raster data is read and sent from the parallel-serial conversion circuit 130 to the printing device 240 as serial dot data.

Thereafter, in the same manner as described above, when the reading of the FDM 110 in the X direction is completed, the Y address register 150 is sequentially updated by +1 and the Y address delay register 1 is updated.
The reading of the FDM 110 is continued until the contents of 51 match the Y-MAX register 153. The content of the Y address delay register 151 is the Y-MAX register 15
3 and the contents of the X address register 141 match the contents of the X-MAX register 143,
The Y coincidence signal 145 and the X coincidence signal 155 are logic "1" respectively.
Then, the completion of reading of the FDM 110 is sent to the control unit 21 by a signal line (not shown), and the control unit 21 causes the FDM 110 to operate.
The reading end instruction of 110 is sent to the FDM unit 22 to finish the reading.

The printing device 30 prints the serial dot data sent from the print control device 20 on paper. Here, when the printing device 30 finishes printing all the dot data of the FDM 110, as shown in FIG. 2D, the print data for four pages is reduced by 1/4 at 240 dpi, and the print data is printed on one page of A4 size paper. To be done.

According to the present embodiment, the print data for four pages can be printed within one page, so that there is an effect that the paper is saved and the printing time for four pages is shortened to 1/4. .. Also, only one FDM is required.

Next, a second embodiment will be described. FIG. 6 shows the configuration of the FDM unit 22 of this embodiment. In FIG. 6, each FDM 401 to 404 is 240 dpi, and A
Stores dot-developed print data for one page of 4 size paper. The X address register 420 is used for each FDM 401.
Address circuit common to the address circuits 4 to 404.
The read addresses of the FDMs 401 to 404 in the X and Y directions are designated by 50. FDM address register (0)
430 and FDM address register (1) 440 are 1-bit registers each, and the total of 2 bits is FDM 401-4.
Specify 04. Where FDM address register (0)
430 is the upper bit, FDM address register (1) 44
0 is the lower bit, and the FDM designation circuit 460
One of the FDMs 401 to 404 is designated as the read FDM. The data read from each of the FDMs 401 to 404 is stored in the 4-byte read register 470.
The parallel-serial conversion circuit 480 is the read register 4
The data of 70 is converted into serial data.

The print data for four pages sent from the higher-level device 10 in page order is dot-developed at 240 dpi by the control unit 21 of the print control device 20 in sequence, and the FDM4 is written in page order by the FDM writing circuit (not shown).
01 to 404 are stored. When the print data for four pages are all dot-developed and stored in all the FDMs 401 to 404, the control unit 21 instructs the FDM unit 22 to perform the FDM 40
It is instructed to send the dot data in 1 to 404 to the printing device 30. First, Y address register 420, FDM
Address register (0) 430, FDM address register
(1) It is assumed that all 440 are cleared to zero. F
Since both the DM address register (0) 430 and the FDM address register (1) 440 are zero, the contents of the FDM designation circuit 460 are (0, 0) (= (contents of the FDM address register 430, contents of the FDM address register 440. )), And designates FDM (1) 401 as a read FDM. Since both the X address register 410 and the Y address register 420 are zero, the address circuit 450
Is (0,0) (= (contents of the X address register 410,
The contents of the Y address register 420)) are output. As a result, 4 bytes starting from the (0,0) address of the FDM (1) 401 are stored in the read register 470, and are sent to the printing device 30 as serial dot data by the parallel-serial conversion circuit 480. Here, X address register 410, Y address register 420, F
The DM address register (0) 430 and the FDM address register (1) 440 each use the clock signal CLKA as the update timing, and further, an X address delay register 411 which is a delay register of the X address register 410,
The Y address delay register 421 of the Y address register 420 and the FDM address delay register 1 which is the delay register of the FDM address register (1) 440.
In 441, the birds use the clock signal CLKB as a signal. The phase relationship between CLKA and CLKB is as shown in FIG. The read timing of each FDM and the fetch timing of the read register 470 are CLKB.

After reading 4 bytes of data from the (0,0) address of the FDM (1) 401, only the X address register 410 is sequentially updated to read the data of the FDM (1) 401. X-MAX register 413, Y-MA
Each of the X registers 423 has 240 dp of A4 size paper.
The paper size when dots are expanded by i is shown. In this embodiment, the paper is in the landscape direction (landscape), and X
The direction is X-MAX = 87 words (= {[(11.7 inches × 240 dpi) / (8 bits × 4 Bytes) rounded up value} -1), and the Y direction is Y-MAX = 1991 raster (=
[8.3 inches × 240 dpi] -1).
The FDM sequentially adds the X address register 410 to the +1 circuit 41.
It is updated while incrementing by 1 at 2, and reading is performed in the X direction. The contents of the X address delay register 411 are X-M
The contents of the AX register 413 are compared with the X comparison circuit 414, and the contents of the X address delay register 411 are X-M.
Until the contents of AX register 413 match, FDM (1)
The reading of 401 in the X direction is continued. When the contents of the X address delay register 411 match the contents of the X-MAX register 413, the X match signal 415 becomes a logic "1", the AND circuit 416 ANDs CLKA, and the X address register 410 is cleared to zero. Further, the X coincidence signal 415 is input to the AND circuit 442, the FDM address register (1) 440 is updated at the timing of CLKA, and the content of the FDM address register (1) 440 is set to logic "1". As a result, the contents of the FDM designation circuit 460 become (0, 1), the FDM (2) 420 is read, and the FD is read.
Specify to M. Like the FDM (1) 401, the FDM (2) 402 has a Y address of 0 and is read from 0 to X-MAX in the X direction. As a result, the first raster of the print data of the first page stored in the FDM (1) 401 and the FD
The first raster of the print data of the second page stored in M (2) 402 is continuously read, and the read register 4
The data is sent from the parallel-serial conversion circuit 480 to the printing device 30 as serial dot data via 70 and is printed.

Next, when the reading of the FDM (2) 420 in the X direction reaches X-MAX, the X-match signal 415 becomes a logic "1" again, the X address register is cleared to zero, and F
The DM110 address register (1) 440 is updated to be logical "0", the FDM designating circuit 460 becomes (0, 0), and the FDM (1) 401 is read again and designated as the FDM.
At this time, as for the input signal of the AND circuit 426, the content of the Y address delay register 421 is “0”,
-Because the contents of the MAX register 423 do not match, the Y match signal 425 output from the Y comparison circuit 424 is a logical "0", the X match signal 415 is a logical "1",
The content of the FDM address delay register 441 is still 1
Therefore, the output signal 443 of the FDM address delay register (1) 441 is logical “1”, and the AND circuit 426
Satisfies the AND condition with CLKA, and the Y address register 420 is updated by +1. When the content of the Y address register 420 becomes 1, the X address register 410 is sequentially updated as in the case of 0, and the reading in the X direction is performed by the FDM (1) 4.
01, when the reading of the FDM (1) 401 in the X direction reaches X-MAX, the X address register 410 is cleared to zero, the FDM address register (1) 410 is also updated, and the FDM (2) 402 in the X direction. Is read by X-MA
Perform up to X. As a result, the second raster of the print data of the first page and the second page is continuously read, and the parallel-serial conversion circuit 48 is read via the read register 470.
Serial dot data from 0 is sent to the printing device 30 and printed. Then, in the same manner as above, FDM (1)
When the X direction reading of 401 is completed, FDM (1) 4 continues.
Data of the same Y address of 02 are sequentially read in the X direction. Hereafter, this FDM (1) 401 and DFM (2) 40
The two readings are alternately continued, and each raster of the print data of the first page and the second page is read.

The above FDM (1) 401 and FDM (2) 40
2 is continued to be read, the content of the Y address register 420 becomes Y-MAX, and the reading of FDM (2) 402
When the content of the X address register 410 becomes X-MAX, the X address register 410 is cleared to zero and the FD
The M address register (2) 440 is updated. Furthermore A
The input signal of the ND circuit 427 is the Y-MAX register 42.
3 and the contents of the Y address delay register 421 match, the Y match signal output from the Y comparison circuit 424 is logical "1", the X match signal 415 is also logical "1", and the FDM address delay register 441 has Output signal 4
Since 43 is also a logic "1", the AND circuit 4 is used with CLKA.
The AND condition is satisfied for No. 27, and the output signal 428 of the AND circuit 427 becomes the logic "1". The Y address register 420 is cleared to zero by the signal 428, the FDM address register (0) 430 is also updated, and the content of the FDM address register (0) 430 becomes logical "1". As a result, the content of the FDM designating circuit 460 becomes (1, 0), and the FDM (3) 403 is designated as the read FDM.

Hereinafter, FDM (1) 401 and FDM (2) 40
When the reading of the FDM (3) 403 in the X direction is completed in the same manner as the reading of 2, the data of the same address of the FDM (4) 404 is successively read in the X direction. The content of the Y address register 420 goes from 0 to Y-MAX,
When the reading up to X-MAX of FDM (4) 404 is completed,
This means that all the print data of the FDMs (1) to (4) 401 to 404 have been read. The printing result in this case is the same as that of the first embodiment. As shown in FIG. 2D, the first page is the upper left of the printing paper, the second page is the upper right, the third page is the lower left, and the fourth page. Is at the bottom right.

According to the present embodiment, the print data for four pages is reduced by 1/4 and can be printed within one page of A4 size paper, so that the paper is saved and the print time for four pages is saved. Has the effect of shortening to 1/4.

In both the first and second embodiments, 1 to
The printing position of four pages is as shown in FIG. 2D, but when the control unit 21 of the print control device 20 writes the result of dot development of print data to the FDM unit 22, the page layout on the FDM is set. By changing the layout, it is possible to change the layout of the pages printed in reduced size within one page of the paper as the printing result.

Further, in the above two embodiments, the print data for four pages is reduced and printed in one page of paper, but any number of print data may be used as long as the print data is four pages or less, for example, printing for two pages. If you want to print out reduced data,
The remaining two pages can be blank printed by clearing the two pages of the FDM to zero. At this time, the page layout in the paper should be arranged when writing to the FDM, as described above. It can be arbitrarily changed by changing it.

Further, in the embodiment, the case of landscape printing is shown, but the X-MAX register and the Y-register are used.
By changing the setting values of the MAX register, portrait printing (portrait) can be supported.

Further, with the same configuration as that of the embodiment, it is possible to reduce the display data of four screens which are dot expanded into one screen and display them on the display device in the display system. Generally, in a printing system or a display system, data of N × N pages (N ≧ 2) is 1 / N ×
It is possible to reduce to N and print or display one page or one screen.

[0035]

As is apparent from the above description, claim 1
According to the invention, the existing high-definition printing device or display device is used without providing a complicated dot density conversion circuit in the printing control device or the display control device and without burdening the software of the host device. Then, it is possible to reduce or print the data of a plurality of pages or a plurality of screens, which have been dot expanded, into one page or one screen.

According to the second aspect of the invention, by preparing one full dot memory in the print control device or the display control device, the dot expanded data of N × N pages or N × N screens can be stored in one. A page or one screen can be reduced and printed or displayed by a printing device or a display device.

According to the third aspect of the present invention, the print control device or the display control device has N × N pages or N × N screens of N × N screens.
It requires N full-dot memories, but each full-dot memory has enough capacity to store the data for one page or one screen that has been dot-expanded, and this kind of conventional full-dot memory can be used as it is. There are advantages.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment when the present invention is applied to a printing system.

FIG. 2 is a diagram showing an example of printing at 240 dpi and 480 dpi for explaining the principle of the present invention.

FIG. 3 is a diagram showing a first embodiment of a full dot memory section in FIG.

FIG. 4 is a flow chart of address setting of the full dot memory in FIG.

5 is a diagram showing a phase relationship between clocks CLKA and CLKB in FIG.

FIG. 6 is a diagram showing a second embodiment of the full dot memory section in FIG.

[Explanation of symbols]

 10 Higher-level device 20 Print control device 21 Control unit 22 Full dot memory unit 30 Printing device

Claims (3)

[Claims] 1. A data output system comprising an output control device for dot-expanding data from a host device and an output device for outputting data dot-expanded by the output control device, wherein the output dot density of the output device is A data reduction output method, wherein the data subjected to dot development by the output control device is reduced by 1 / N × N and output as N times the dot development density of the output control device. 2. The output control device comprises one full dot memory having a capacity capable of storing dot expanded data for N × N pages or N × N screens, and the dot expanded N × N for the full dot memory. 2. The data reduction output system according to claim 1, wherein data of a page or N.times.N screens is stored and sent to the output device, and the output device reduces and outputs to one page or one screen. 3. The output control device is provided with N × N full dot memories having a capacity capable of storing dot expanded data for one page or one screen, and each full dot memory for one page or one screen expanded. 7. Each of the data is stored and sent to the output device, and the output device reduces data for N × N pages or N × N screens to one page or one screen and outputs the reduced data. Data reduction output method described in 1.