JPH02106363A - Graphic information rotating circuit of printer - Google Patents

Abstract

PURPOSE:To shorten time for converting the direction of characters to be printed from lateral writing to vertical writing and to accelerate a printing time by processing the rotation of graphic information of a printer by the use of hardware. CONSTITUTION:8-bit information of a first column is sequentially read from above from a memory 1 to a graphic information selector 5 by a position information signal 10 from an address generator 3, input one by one bit to a shift register 6, and so transferred to an external printer that 8 bits to be transferred are disposed at the 8 bits of a lowest part of the graphic information. When the first column is finished, the read bits of a second column are similarly so transferred that 8 bits of second row from the lowest part of the information. Thus, when the bits of the eighth column are read and transferred, the information written in the memory 1 is rotated counterclockwise at 90 deg..

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a figure-information rotation circuit of a printing device, and in particular expresses brightness information of pixels obtained by decomposing a figure as binary data, and converts this data into binary data. The present invention relates to a graphic information rotation circuit for a printing device that rotates a graphic by 90 degrees left and right.

[Conventional technology]

Conventionally, characters or numbers printed by a printing device are divided into pixels, and then the brightness information of each pixel is converted into a binary number (0
, 1>, and the graphic information expressed in binary numbers is stored in the character generator. When printing these figures, the graphic information of the corresponding letters or numbers is read out from the character generator as necessary, and the letters or numbers are printed.

Normally, the character string printed by the printing device is printed in such a way that the character string is horizontally written, but when printing vertically written text, the direction of the characters to be printed is changed from the horizontal writing direction. You need to change the orientation for vertical writing. Therefore, after reading the graphic information for horizontal writing from the storage device, the program can write the graphic information 90' to the right or 90' to the left.
It is rotated and rearranged into graphic information for vertical writing.

[Problem to be solved by the invention]

The method of rotating graphic information in the conventional printing device described above uses a program to rotate the graphic information when printing vertically, so the process takes time and the printing speed is slower than when printing horizontally. The problem is that the speed is slow.

An object of the present invention is to provide a printing device that can obtain graphical information of vertically written characters from graphical information of horizontally written characters in a short time and increase printing speed when printing vertically written text. An object of the present invention is to provide a graphic information rotation circuit.

[Means to solve the problem]

A graphic information rotation circuit of a printing device according to the present invention includes: a storage section that stores graphic information; an address generation section that generates a successive address signal for reading graphic information from the storage section;
an address signal selection unit that selects a write address signal for writing graphic information to the storage unit and the read address signal; and a shift register unit that stores the graphic information read by the successive address signal. It is configured with.

[Example 1] Next, a first example of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of a first embodiment of the present invention.

The graphic information rotation circuit of the printing device shown in FIG. 1 includes a storage section 1 that stores graphic information, and an address generation section 3 that generates a read address signal for reading graphic information from the storage section 1.
, an address signal selection section 2 that selects a write address signal and a read address signal for writing graphic information to the storage section 1, and a shift register section 4 that stores bits of the graphic information read from the storage section 1. It consists of

Further, the shift register section 4 includes a graphic information selection circuit 5 that selects bits of graphic information outputted from the storage section 1, and a shift register 6 that stores bits of graphic information outputted from the graphic information selection circuit 5. ing.

Next, the operation will be explained.

When a character or number is printed in a vertically written text by a printing device, the bits of the graphic information are read out from a character generator in which the graphic of the character or number is decomposed into pixels and stored as bits. The read graphic information bits are written into the storage section 1 using the data bus 8, and at this time, they are written to a designated location in the storage section 1 by a write address signal. This address signal is input to the storage section 1 via the address bus 7 and the address signal selection section 2.

FIG. 3 is a layout diagram of graphic information.

The graphic information stored in the storage unit 1 is the character "I" in katakana as shown in FIG. Explain.

The graphic information in FIG. 3 is 8 dots x 8 dots, and the storage unit 1 also uses a RAM with an 8 bit x 8 bit configuration, so the address generator 3 uses a 3 bit counter and the conversion position information The shift register 6 consists of 8 bits.

When a figure rotation command signal is applied from the outside, the address signal selection section 2 is driven, and the successive address signal generated from the address generation section 3 is selected and supplied to the storage section 1. The address generator 3 is driven by a clock signal 9, outputs a converted position information signal 10, and outputs an address signal in which the address sequentially advances from "1" to "8". At this time, the converted position information signal 1o output from the address generator 3 and initially set to "1" is transferred to the storage section 1.
It instructs the storage unit 1 that the bit read from the first column is the bit of the first column, and the third
The 8 bits in the first column shown in FIG. 1A are sequentially read out from the top to the graphic information selection circuit 5 and input to the shift register 6 one bit at a time.

Each bit input to the shift register 6 is transferred in parallel to an external printing section, but at this time, the transferred bits are
The bits are transferred to the bottom 8 bit positions of the graphic information shown in FIG. 3(b).

When the first column is completed, the conversion position information signal 10, which is then set to "2", instructs the storage unit 1 that the bit read from the storage unit 1 is the bit of the second column, and is read out. The bits in the second column are input to the shift register 6 in the same manner as described above. These 8 bits are transferred so as to become the 8 bits on the second row from the bottom of the graphic information shown in FIG. 3(b).

In this way, when the bits in the 8th column are read and transferred, the graphic information shown in FIG. ° Rotate.

As described above, in the printing device, the rotation processing of graphic information is performed by hardware, and the orientation of characters to be printed can be changed from horizontal writing to vertical writing, thereby increasing the printing speed.

In the above explanation, the 8 bits of the first column input to the shift register 5 are rotated 90 degrees to the left, but the 8 bits of the topmost 8 bits of the graphic information shown in FIG. If you transfer it so that it becomes, you can rotate it 90” to the right.

[Embodiment 2] Next, a second embodiment of the present invention will be described with reference to the drawings.

FIG. 2 is a block diagram of a second embodiment of the invention.

The graphic information rotation circuit of the printing apparatus shown in FIG. It is composed of an address signal selection section 2 that selects a write address signal and a successive address signal for writing graphic information, and a shift register section 14 that stores bits of the graphic information read from the storage section 11. .

Further, the shift register unit 14 includes a shift register 16 that stores bits of graphic information output from the storage unit 11.
It is composed of a to 16h.

Next, the operation will be explained. The operation until graphic information of characters or numbers to be printed is input into the storage section 11 is the same as in the first embodiment.

Also, as in the case of the first embodiment, the graphic information stored in the storage unit 11 is a katakana character "I" as shown in FIG. The following is an example of converting to written text.

The storage section 11 also uses an 8-bit by 8-bit RAM, the address generating section 13 is a 3-bit counter, and the shift registers 16a to 16h are each composed of 8 bits.

The process is the same as the first embodiment until a figure rotation command signal is applied from the outside and a read address signal is supplied to the storage section 11.

In response to the read address signal, 8 bits from the first column to the eighth column shown in FIG. 3(a) are read from the storage section 11. The bits in the first column are in shift register 16a
, and the bits in the eighth column are sequentially transferred to each shift register 16a from the top, such as shift register 16h.
~16h is input. Shift registers 16a to 16h
Each bit input to the printer is transferred in parallel to the external printing unit, but the 8 bits transferred from the shift register 16a become the lowest 8 bits of the graphic information shown in FIG. The 8 bits transferred from the register 16h are transferred so as to become the top 8 bits of the graphic information shown in FIG. 3(b).

By reading and transferring the bits of each column in this manner, the bits are rotated 90 degrees to the left as shown in FIG. 3(b).

In this embodiment, the bits of each column read from the storage section 11 are output in parallel to the shift registers 16a to 16h, so the conversion speed is eight times as fast as in the first embodiment.

〔Effect of the invention〕

As explained above, the present invention allows the rotation processing of graphic information of the printing device to be performed by the hardware unit, not by program processing, when performing vertical printing.
This has the effect of shortening the time required to convert the orientation of characters to be printed from horizontal writing to vertical writing, and increasing the printing speed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention, FIG. 2 is a block diagram of a second embodiment of the present invention, and FIG. 3 is a layout diagram of graphic information. 1...Storage section, 2...Address signal selection section, 3...Address generation section, 4...
Shift register section, 5...Graphic information selection circuit,
6...Shift register, 7...Address bus, 8...Data bus, 9...Clock signal, 10...Conversion position information signal, 11
... Storage section, 13 ... Address generation section, 14 ... Shift register section, 16a to 16h
...Shift register. 2 Near F System Signal 5 Autumn Section Wa 1 A P'L's Bass/3 Near Ayu Nuji Part 7f: 57) - L S'λ Translation is also p A H'b's complete life Ikushifu F-L scene 7 Ikuguchi or Josai station mouth name shift register No. 7 : Changing wolf 1 request for compensation (shi) porridge (C)

Claims (1)

[Claims] a storage section that stores graphic information; an address generation section that generates a read address signal for reading graphic information from the storage section; a write address signal for writing graphic information into the storage section; 1. A graphic information rotation circuit for a printing device, comprising: an address signal selection unit that selects a read address signal; and a shift register unit that stores graphic information read by the read address signal.