JPS604069A - Printer - Google Patents

Abstract

PURPOSE:To make both the high speed printing of low printing quality and the high quality printing of slow printing speed possible, by properly using two letter generators having different matrix densities. CONSTITUTION:The letter generator 8 stored with letter pattern of coarse density (hereinafter, referred to as rough copy (G1) and the letter generator 9 stored with letter pattern of fine density (hereinafter, referred to as fair copy (G2) are housed in memory 5. When the printer 10 is supplied with the information and printing code of rough copy mode, the microprocessor 1 selects the rough copy CG8 in memory 5 and at the same time the carrier control part 2 carry out two- way printing. Under this condition the microprocessor 1 edits the data output in succession from rough copy CG8 for two-way printing, drives the printing head 6 and the high speed printing of low quality printing is carried out. When fair copy information is supplied, the fair copy CG9 is selected and at the same time, the carrier control part 2 is settled to one-way printing and the high quality printing is caried out.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a printer device, and in particular, a first printing mode in which printing quality is low but high-speed printing is possible, and a first printing mode in which printing speed is slow but high-quality printing is possible. The present invention relates to a printer device which has a second printing mode and can switch between these modes.

[Background of the invention]

In serial dot matrix printer devices,
It is well known that printing quality improves by increasing the dot density, and for this reason, improvements such as increasing the number of vertical dots have been attempted. In addition, in order to achieve higher speeds in the above-mentioned dot printer, it is basically necessary to improve the responsiveness of the print head, but there is also a method that prints while moving the print head in both directions. be. The method of printing while moving the print head in both directions has the problem that the print position shifts depending on the printing direction, especially over time, due to play in the belt for moving the print head and the mechanism that drives the belt. is also well known.

As is clear from the above explanation, it has high printing quality,
Moreover, it is an extremely difficult problem to realize a printer device capable of high-speed printing.

However, when a person creates a text, he or she first drafts it (the writing speed is fast, but the handwriting is generally bad), and after checking the content, the so-called "clean copy" (the handwriting is clean, but
(In general, the printing speed is slow), so in printers, when you want to print at high speed even if the print quality is a little low, for example to check the content, or conversely, even if the print speed is a little slow, There are cases where it is desired to print with high print quality. Conventionally, a printer device that satisfies these demands has not been known.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and its purpose is, as mentioned above, to enable high-speed printing as long as some deterioration in print quality is allowed, and to avoid the slight decrease in printing speed. The object of the present invention is to provide a printing device capable of printing with high print quality if possible.

[Summary of the Invention] The main point of the present invention is to provide a dot matrix type serial printer device that prints a character pattern by moving a print head in a predetermined direction, in which two character generators with different matrix densities are provided, and the print head a first mode in which printing is performed only in one direction of movement, and a second mode in which printing is performed in both directions;
In the first mode, a character generator with a high matrix density is used, and in the second mode, a character generator with a low matrix density is used.

[Embodiments of the invention]

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1o is a microprocessor l.

Carrier control unit 2. Driver 3. Operation panel 4. 2 described later
Memory with two character generators5. It is a printer device consisting of a printing head 6, a head driver 7, etc.
is an external controller.

The memory 5 includes a first character generator 8 (hereinafter referred to as "R draft CG") which stores coarse density character patterns, and a second character generator 8 which stores fine density character patterns. A generator 9 (hereinafter referred to as "r-cutting CG") is stored. Which of the two character generators 8 and 9 is used is determined by the external controller 20 or the operation panel 4.
shall follow the instructions from.

The carrier control section 2 has the function of driving, stopping, and controlling the running speed of a motor for moving the carrier (not shown), and thereby allows the print head 6 to be moved to an arbitrary position via the driver 3. I can do it. Further, whether printing by the print head 6 is performed only in one direction of movement or in both directions is determined according to instructions from the external controller 20 or the operation panel 4 in combination with the selection of the character generators 8 and 9. do. Note that the microprocessor 1 has a function of detecting or outputting the state of the operation panel 4.

The operation of this embodiment configured as described above will be explained below.

In the following explanation, the case where the draft CG 8 is used and printing is performed in both directions of movement of the print head 6 is referred to as the draft mode, and -1; when the draft CG 9 is used and the print head 6 is moved The case where printing is performed only in one direction is called fair copy mode. Printer device 111
0 is supplied with either the draft mode or fair copy mode information along with the print code etc. from the external controller 20 or the operation panel 4.

Now, when the printer device [10 is supplied with draft mode information and a print code from the external controller 20 or the operation panel 4, the microprocessor l specifies the draft CG 8 in the memory 5, and the The carrier control section 2 is set to perform bidirectional printing. In this state, the microprocessor 1 uses the draft CG8
The data read from the printer is edited for bidirectional printing, and the print head 6 is driven via the head driver 7 to perform high-speed printing although the print quality is low.

In the above description, the case where a print code is supplied together with the draft mode information is given as an example, but when a coarse density character pattern is supplied from the external controller 20, the draft code in the printer device 10 Needless to say, the CG 8 is not used, and only the processing after editing the print code supplied from the external controller 20 is performed.

When information on the fair copy mode is supplied to the printer device 10 from the external controller 20 or the operation panel 4, the fair copy CG 9 is selected and the carrier control unit 2 is set to perform unidirectional printing, resulting in high quality printing. Printing is performed. In this case as well, it goes without saying that if a fine-density character pattern is supplied from the external controller 2o, the CG 9 for copying in the printer device 10 is not used.

〔Effect of the invention〕

As described above, according to the present invention, in a dot matrix type serial printer device that prints a character pattern by moving a print head in a predetermined direction, two character generators with different matrix densities are provided, and the print head A first mode in which printing is performed only in one direction of movement of the character and a second mode in which printing is performed in both directions, and in the first mode, a high matrix density character generator is used; In the second mode we use a low matrix density character generator! All <
With this configuration, a printing device that can select between a printing operation that has low printing quality but high printing speed that can be used for so-called drafts, and a printing operation that has slow printing speed but high printing quality that is suitable for use in fine-printing. This has the remarkable effect of realizing the following.

[Brief explanation of the drawing]

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

Claims (1)

[Claims] (1) In a dot matrix type serial printer device that prints a character pattern by moving the print head in a predetermined direction, two character generators with different matrix densities are provided, and only one character generator is used in one direction of the print head movement. A first mode in which printing occurs and a second mode in which printing occurs in both directions, a high matrix density character generator in the first mode and a low matrix density character generator in the second mode. 1. A printer device configured to use a high-density character generator.