JPS58109982A - Character position controlling system - Google Patents

Abstract

PURPOSE:To simplify the instruction from a host and to attain easy head control of the printer side, by providing image buffers for plural lines' share (for plural lateral movements of head) at the printer side. CONSTITUTION:Two lines' share of data are fetched in image buffers 3, 3', and a line feed pitch is fetched to a register REG3, then a print control section 21 is started. The 1st print designation is executed at the print control section 21, the upper half data is read out from the image buffer 3 and the 1st print is started. As the print head moves laterally, the present head position Pi of the register REG1 is added with +1 sequentially, and the position is sequentially increased as P1, P2-, and the output of a comparison circuit 24 is Pi>P1. When the print for one line's share (1st time) is finished, the print control section 21 starts a paper feed control section 22 and a head returning control section 23 without waiting the instruction from a host CPU.

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical division of the invention The present invention divides characters, etc. with a number of dots greater than the number of bins of a print head into multiple passes in the horizontal direction, that is, in the direction perpendicular to the paper feeding direction. This invention relates to a printing control method for a dot printer that prints.

(In No-Technology's snowscape dot printer, the structure of kanji is more complicated than that of alphanumeric characters, so one alphanumeric character is divided into, for example, 8 to 9 dots. If it were to be printed (divided in the same way), then K, which prints one kanji character with the same level of clarity as this, would be 16 to 24 do in the vertical direction,
It needs to be divided into two parts. However, dot printers developed for alphanumeric characters do not have the 8 to 9 bins required to print alphanumeric characters, so if you want to print, for example, 16 vertical kanji characters, 1 character up and down 2
Control is required to print 8 dots at a time. 1
Figure 11 is an example of this, with 16 x 16 do, g and one kanji character (
``Country'') ゲ゛ character.

To print, HD has 8 bins, and when it is moved from the solid line position to the right direction R, the lower half of "1" is printed in the 1st printing. When the first printing is completed, it moves 8 dots in the direction of the recording paper HA and starts printing.

HD returns to the left. And print head HD
In the second printing when moving from the broken line position to the right direction R, "
The lower half of "Country" is printed. If one kanji character has 24 dots in the vertical direction, it is printed in the same manner six times at the top, middle, and bottom.

When printing one character multiple times, the first time prints while moving the print head (IDt) rightward RK, and the second time prints while moving it back to the left, alternating the printing direction. This method can eliminate unnecessary movement of the print head HD, but since the print head drive mechanism is mechanical, there is backlash, and it is difficult to match the first and second prints. It's easy to get bumps in your eyes. Therefore, when printing one character by dividing it in the vertical direction, it is advantageous to use a printing control method that aligns the printing direction each time as described above.

(5) Prior art and problems By the way, even with the above-mentioned nine same direction printing methods, the print head H
There are two ways to return to the D-meeting position. End part p of one-shot printer
o, and the other 01 is the 1st printing start position PI. Which position can be selected depends on how instructions are given from the central processing unit. For example, in the system shown in diagram N2,
When the CI'U1 instructs the alphanumeric printer 2 to start printing the first @th print data [transmission 9] from point t P1, the printer 2 imports the corresponding print data into the image bar 7a5, To print, move HD k, a Pt K and then move in a predetermined direction. In this example, the first print is in the right direction.
ts start. Then, when the first printing is completed,
If the CPU 1 simply instructs to return the head HD, the wrinkled head returns to the end P. On the other hand, to.

If the head is instructed to return to the first printing start position P1, the head returns to point P1. To start the second printing, the host CPU sends the second printing data and printing start position information. Then, a print command is given.Of course, a paper feed command is also required before starting the second printing.

The reason why the instructions from the host CPU 1 are complicated in this way is that the printer 2 can print by moving 11gI of the image buffer 3? It corresponds to the character string 2@
For kanji that are printed separately, it is the upper or lower half), and the printer 211 cannot process the print data taken into buffer 3 by correlating it with the previous line of print data. It's for a reason. In addition, if we call the 8 dots and t1 digits that can be printed in one operation of the HD, the above-mentioned line consists of a large number of these digits arranged horizontally.
c4b, so To9, and if one line is a digit, one line (
The capacity of the image buffer 3 for one row of the head is 8X
m bi, g.

(4) Purpose of the Invention The present invention II simplifies instructions from the host side and controls head control on the printer side by providing an image buffer for multiple characters (for multiple horizontal lines) on the printer side. I'm just trying to make it easier.

(51 Structure of the Invention The basic structure of the present invention is a paper feed control section that drives a paper feed mechanism to feed paper in the vertical direction, and an interface control section that exchanges data between the central processing unit and the central processing unit. and,
The image buffer that stores the print pattern data from the central processing unit and the print that is transferred in the horizontal direction by the do drive mechanism, one line of characters is transferred in the axillary direction by one six horizontal movements of do. In the print control method of a dot printer, the print control unit divides the image into a plurality of parts along a line along the line and prints using the data stored in one of nine t% image buffers. The image buffer is designed to have a capacity that can store one line of O print data printed by horizontal movement of the print head, and the print data of the print head is continuously sent from the central processing unit to the image buffer by horizontal movement of the print head multiple times. , specify the first print position and store it, and use the data in the image buffer to print 1
The second printing is performed from the first printing position, and the second and subsequent lines are also printed from the stored printing start position in the same direction as the first printing.

(6) Embodiments of the Invention The present invention will be described in detail below with reference to illustrated embodiments. FIG. 5 is a block diagram of a printer device showing an embodiment of the present invention, in which 20 is an interface control section, 21 is a print control section, 22 is a paper feed control section, 23 is a head return control section, 24 is a comparison circuit, 25 is an addition/subtraction circuit, RI Gs
-RK Gm BL/Ji xp p1 image buffer 73 s 5' is provided for two lines.

If the print data is related to alphanumeric characters, the CPU transfers parallel data of 1 digit, 8 bits, and 8 bits, which are printed once in 8 bins, line by line. Therefore, in this case, it is sufficient to use only one image buffer 3. On the other hand, if the print data is 1 digit 16-bit kanji data, conventionally the upper half data is first printed, and after the upper half data is printed, the lower half data is printed twice, and so on. However, in this example, this is transferred in one go, and then the upper half of the data is imported into one image buffer 3, and the lower half of the data is imported into the other image buffer 3'. At this time, the host CPU instructs the line feed pitch (paper feed) for the first and second lines, and this is the register RIG.

is set to The line feed pitch of C is 8n in the example of FIG. 1, where the vertical dot spacing is 't-n.

There is also a method in which the second @ printing dot is placed between the first @ printing dots, but in this case the line feed pitch is v'
It is 2. Furthermore, the CPU instructs the position (11th Pt) Yc at which printing of the first line is to be started. This is taken into the register RICGI labeled "Current head position" in FIG. 3, but is also set in the register REG labeled "Evacuation, do position" immediately before printing starts. The register REG1 is eTh+1 (moved to the right) or Fi-1 (moved to the left) as the head HD moves, and always indicates the current head position it.

Two lines of data are loaded into the image buffer 3.3', and the line feed pitch is loaded into the ninth register RgGm.
When the print control unit 21 is activated, the print control unit 21 first specifies printing for the first time, and the image buffer 3
The upper half of the data is read out and the first printing is started. Register RICG with print head running rampant
To the current state of I, the do position Pi is sequentially incremented by 1 and becomes pi #
The number of songs pi I increases sequentially, and the output of the comparison circuit 24 becomes Pi>Ps. When the printing of one line (first@th) is completed, the print control section 21, while waiting for an instruction tube from the CPU (host), controls the paper feed control section 22 and the head return control l5.
Start 23. As a result, the paper feed control unit 22 feeds the paper by the line feed pitch of 8m stored in the register REG, and then the return control unit 23 moves the head to the left since Pi>Pt. . As the head is moved back one digit to the left, the contents of register REGI become -1, so %
When Pizh is reached, the return control 1123 stops the head transfer. This position is the same printing start position P1 as the first @th position. In this state, the print control 4121 issues a second print designation and prints one line of data from the image buffer 3''.

(7) Effects of the Invention With the print control method of the present invention as described above, the central processing unit only needs to send data once, and the printer side then prints the data, automatically printing the data according to the number of bins. Therefore, even when printing a kanji tube of 16 vertical lines in two lines, for example, there is no need to specify the two lines HK. In addition, since data can be similarly transferred to a printer that has a 16-bin printer, the number of types of programs on the central processing unit side can be reduced. Furthermore, since there is no need to accept the instruction on the second line on the printer side, there is no need to return to, for example, ED\c 11 II P@ and wait, which has the advantage of making head control easier.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of the printing control system of a dot printer, Figure 2
The figure shows a schematic configuration of a dot printer t-terminal binding system, and Figure H3 is a diagram showing an embodiment of the present invention. 2. 1, 2 is a dot printer, 3.3' is an image buffer, HD is a print head, 20 is an interface control section, 21 is a print control section, and 22 is a paper feeding section 111fIl1 section. Applicant: Fujitsu Kinsha, Patent Attorney, Minoru Yanagi

Claims (1)

[Claims] An image of a paper feed control unit that drives the paper feed mechanism to feed the paper in the vertical direction Ka, an interface control unit that exchanges data with a central processing unit, and a storage of print pattern data from the central processing unit. One of the characters divided into a plurality of lines along the line direction by one horizontal movement of the do is transferred to the image buffer and then to the print that is transferred in the horizontal direction by the head drive mechanism. In the print control method of a printer comprising a print control unit that prints using data stored in the image buffer, one line of print data printed by multiple horizontal movements of the print head is stored in the image buffer. The central processing unit continuously sends the print data for multiple horizontal movements from the central processing unit to the cough print, stores it in the image buffer, and specifies the first print position & to store it. Then, using the data in the image buffer, the first printing is from the first printing position of the wrinkle, and the second and subsequent lines are also printed from the stored printing start position in the same direction as the first printing. Printing control method.