JPH02301452A - Printing system - Google Patents

Abstract

PURPOSE:To conduct required printing under simple control by providing a shift register capable of shifting rightward or leftward with respect to an output from a memory. CONSTITUTION:Data read from a memory 10 is inputted in a shift register 11 capable of right-shifting or left-shifting per bit. The data is fetched from a position corresponding to an inclined pin arrangement. In the memory 10, data '1' or '0' (null) are stored in bits b1-b8 of each address (A1-A5). The data in the memory 10 are read in the order of A1 A5 as a printing head moves rightward and sequentially shifted from the left shift input side of the shift register 11. When data '1' is shifted to a position where the output line of the shift register 11 is led out, a driver circuit 13 is driven by a gate circuit 12 in synchronism with a printing timing pulse, whereby a magnet 14 is excited, a pin 15 is actuated, and a dot is impact printed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a printing method for a dot serial printer [Prior Art] Conventionally, this type of dot serial printer stores data in a memory 1 as shown in FIG. The vertically pin-aligned print head can print the pattern to the right or left! As the print head moves, one column is read out vertically for each address of the memory, inputted to the register circuit 2, and the output gate circuit 3 is opened in accordance with the print timing pulse generated when the print head comes to the print position. By driving the drive circuit 4 and energizing the magnet 5, the vertically arranged pins 6 are actuated to form dots like a print pattern 7. In this case, since the memory pattern and the pin arrangement correspond vertically, the print pattern can be obtained by simple control of reading out the pattern one column at each memory address.

[Problem to be solved by the invention]

Incidentally, arranging the pins diagonally rather than arranging them vertically may be more advantageous in terms of print head design and manufacturing. Fourth
When pins 8 arranged diagonally as shown in the figure are used to make dots under the control shown in Figure 3, the characters will also be tilted diagonally as shown in the print pattern 9. This is corrected and controlled by the microprocessor. In this case, the data read out from the memory one column at each address must be processed bit by bit in order to correspond to each pin, which requires a long processing time and is difficult to achieve in order to realize a high-speed dot serial printer. It was a drawback.

[Means to solve the problem]

In the present invention, in a dot matrix serial printer having diagonally arranged pins, when a pattern stored in memory is read and printed vertically one column at a time for each memory address, the printed characters are also diagonally arranged. Since the data is tilted, the data read from the memory is input to a shift register that can be shifted right and left bit by bit, and the output is taken out from the position corresponding to the diagonal pin arrangement.

〔Example〕

Next, an embodiment of the present invention will be described with reference to FIG.

From the position corresponding to the memory 10 storing the pattern and the shift register 11 capable of right shift and left shift, whose output for each bit is connected to the right shift input and the left shift input, and the pins 15 arranged diagonally. It includes a gate circuit 12 to which the output of the shift register 11 taken out is connected, a driver circuit 13 connected to the output, and a magnet 14 connected thereto.

In this embodiment, a case will be described in which a print head whose pins are arranged diagonally one dot at a time prints while moving rightward.

In the memory 10, data of "1" or "O"(0" is blank in this figure) is stored in b1 to b8 of each address (At-As in this figure).The data in the memory 10 is as follows.
Address A1 → A5 as the print head moves to the right
are read out in this order and shifted sequentially from the left shift input side of the shift register 11. When '1' is shifted to the position where the output line of the shift register 11 is taken out, the gate circuit 12 drives the driver circuit 13 in synchronization with the print timing pulse, and the magnet 14 is excited. The pin 15 is actuated by the dot 15, and a dot is struck.

FIG. 2 shows the relationship between the shift register and diagonally arranged pins, and shows the process of dotting. 1
6 is a simulation of a shift register, showing that the output is taken out from the position of the white circle; 17 is a pin position arranged diagonally corresponding to the white circle of the shift register 16; The black circles indicate dots. In the shift register 16, when the data of “1” or “0” (“0” is blank in this figure) is shifted to the left and “1” comes to the position of the white circle, that position is The pin corresponding to the point is activated and a point is struck.

FIG. 2(A) shows that when the print head reaches the first dot position, the data at address A1 in the memory 11 is input to the first stage on the right side, which is the left shift input side of the shift register 16, and The presence of "1" at the top white circle position indicates that a point was placed at the corresponding top pin position.

Figure 2 (B) shows that when the print head moves to the next position,
The position of the white circle where "1" is shifted, similar to (1), shows that the data at address A2 of memory 10 is input to the first stage of the shift register, and the previous data is shifted to the left. A dot is placed at the pin position corresponding to .

In the following Figures 2 (C) to (L), the data in the memory 1° is similarly input to the shift register 11 and is shifted to the left, and when "1'' comes to the position of the white circle, it is printed. show.

In this embodiment, the case where the print head moves to the right has been explained, but when the print head moves to the left, data is read from the memory 10 in the order of addresses A5 → A1, and the write head is transferred to the write shift input side of the shift register 11. The required printing is possible by inputting from the left side and shifting to the right side in the order of L) to (A>.

Also, in this embodiment, only the case where the pins are arranged diagonally has been explained, but even in the case of other arrangements, the shift register can be configured to match the pin arrangement, and the output can be output from the position corresponding to the pin arrangement. By taking it out, it is possible to print as desired.

〔Effect of the invention〕

As described above, in the present invention, by providing a shift register capable of write, shift, and left shift at the output of the memory, desired printing can be performed with simple control.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a block diagram showing the printing method according to the present invention, and Figures 2 (A) to (L) show the process of shifting data in a shift register and the dots formed by diagonally arranged pins. FIG. 3 is a block diagram showing a conventional printing method, and FIG. 4 is a diagram showing diagonally arranged pins and printing results.

Claims (1)

[Claims] In a dot matrix serial printer that has a print head in which wire pins are arranged diagonally, a shift register that can shift right and left is provided corresponding to each pin, and the pattern stored in memory is transferred vertically for each memory address. A printing method characterized by reading out columns one by one, sequentially inputting them to a shift register, and then taking out and printing the output from a position corresponding to a diagonal pin arrangement.