JPH03258569A - Device for printer - Google Patents

Abstract

PURPOSE:To enable memory for one page to retain printing data for one page or more by retaining the printing data as one page unit in the memory and constituting the title device so as to print the data in one page unit. CONSTITUTION:A printer device 2 is constituted of a data receiving block 3, a printing data development block 4, a bit image transfer block 5 and a printing process 6. Character and control codes and pattern data, which are sent from a host computer 1, are received by the data receiving block 3 and sent to the printing data development block 4 in sequence. In the printing data development block 4, the character code and the pattern data are developed and compressed into a memory to be retained therein. When the development of the data for one page is finished, all the compressed data are sent to the bit image transfer block 5. In the bit image transfer block 5, the compressed data are sent to the printing process 6 to be printed while being extended.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printer device that prints characters, control codes, and graphic data sent from a host computer in units of one page.

[Prior Art] In a conventional printer device that prints in units of one page, characters, control codes, and graphic data sent from a host computer are printed in one page [Problems to be Solved by the Invention] However, the above-mentioned In the prior art, one page of memory is required to hold a bit image in memory. Furthermore, when holding the intermediate code, the development of the intermediate code may not be able to keep up with the printing speed of the printing process in complicated printing.

The present invention is intended to solve these problems.The purpose of the present invention is to compress data developed in memory as a bit image using software or hardware, store it in memory, and then print it using software or hardware. This is a method of decompression using hardware.

[Means for Solving the Problems] The printer device of the present invention expands character/control code and graphic data sent from a host computer into a memory in possible units, compresses it, holds it in the memory, and decompresses it. It is characterized by printing while

[Operations] According to the above means of the present invention, print data can be held in a small amount of memory by compressing the bit image once developed in the memory.

[Examples] Hereinafter, the present invention will be described in detail based on Examples.

FIG. 1 shows the configuration of a printer device (2) according to the present invention, and
Shows the flow of data.

The printer device (2) is composed of a data reception block (3), a print data development block (4), a bit image transfer block (5), and a print process (6).

Characters, control codes, and graphic data sent from the host computer (1) are received by a data reception block (3) and sequentially passed to a print data development block (4).

The print data expansion block (4) expands, compresses, and holds character codes and graphic data in memory.

When one page of data has been expanded, all the compressed data is passed to the bit image transfer block (5).

The bit image transfer block (5) decompresses the compressed data and sends it to the printing process (6) for printing.

FIG. 2 is a flowchart of the print data development block (4).

The data passed from the data receiving block (3) is distinguished into characters, graphics, and control codes, and the characters and graphics data are developed in memory every line or several lines.

If the expansion line changes due to the execution of the control code,
The currently expanded line is compressed, and if the changed line is a previously expanded line, it is expanded and expanded.

When one page of data has been expanded, the compressed data is passed to the bit image transfer block (4) and the next page begins to be expanded.

FIG. 3 is a flowchart of the bit image transfer block (5).

The data passed from the print data development block (4) is
It expands one line or several lines and passes the data to the printing process (6) for printing.

It should be noted that the embodiment mentioned here is just one embodiment.

[Effects of the Invention] As described above, the present invention compresses the print data developed in the memory, thereby making it possible to hold one page's worth of print data with a small amount of memory. This has the effect that print data can be retained.

Diagram showing the configuration and data flow. FIG. 2 is a flowchart of the print data development block (4). FIG. 3 is a flowchart of the bit image transfer block (5).

that's all

Claims (1)

[Claims] Print data in units of 1 page is held in memory, and 1
A printer device that prints page by page.