JPS63178054A - Dot serial printer - Google Patents

Abstract

PURPOSE:To prevent a processing speed from lowering more than a necessary extent, by performing low noise printing only when the printing dot density of one line is higher than preset dot density. CONSTITUTION:When a low noise printing order 21 is inputted, a dot density calculation part 2 calculates the dot density in one line from printing data 12 to output dot density data 22. When low noise printing may not be performed according to the dot density data 22, a low noise printing control part 3 does not output a low noise printing practice signal 31, and usual printing is performed. In the case of dot density having to perform low noise printing, the low noise printing practice signal 31 is outputted to perform low noise printing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a dot serial printer, and more particularly to control of low-noise printing execution.

[Conventional technology]

Conventionally, this type of dot serial printer has always performed a low-noise printing operation, regardless of the actual printing dot density, when the low-noise printing operation is specified by an operation by a host device or an operator.

[Problem that the invention seeks to solve]

In the conventional dot serial printer described above, when low-noise printing operation is specified by a host device or an operator, one line is always divided into multiple prints or printed at a speed lower than the normal printing speed. However, since the dot density is low and therefore the noise is not very high, lines are printed using divided printing or low-speed printing, which lowers the processing speed more than necessary.

[Means for solving problems]

The dot serial printer of the present invention has a calculation unit that calculates the printing dot density of one line, and compares a preset dot density with the dot density calculated by the calculation unit, and calculates a dot density higher than the preset dot density. and a control unit that performs control to perform low-noise printing when the noise level is high.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of one embodiment of the present invention. The print pattern development unit 1 receives the print data 1 from the host device.
1 is input, and print pattern data 12 is output. When the low noise printing command 21 is input, the dot density calculation section 2 calculates the dot density in one line according to the print pattern data 12 and outputs dot density information 22. The low noise printing control unit 3 compares the dot density information 22 with a preset low noise printing start dot density and outputs the dot density information 22.
When the dot density is higher than the low noise printing start dot density, a low noise printing execution signal 31 is output. The print control unit 4 sends driving conditions and a print pattern to the drive unit 5 so as to perform normal printing or low-noise printing in accordance with the low-noise printing execution signal 31.

When the low-noise printing command 21 is not input, the dot density information 22 and the low-noise printing execution signal 31 are not output, and the print control unit 4 instructs the drive unit 5 to perform driving conditions and a print pattern for normal printing. Send.

On the other hand, when the low noise printing command 21 is input, the dot density calculation section 2 calculates the dot density in the - line from the printing pattern data 12, outputs dot density information 22, and the low noise printing control section 3 calculates the dot density in the - line. If the dot density does not require low-noise printing according to the dot density information 22, the low-noise printing execution signal 31 is not output and normal printing is performed. A noise printing execution signal 31 is output, and low noise printing is executed.1 FIG. 2 shows another embodiment of the present invention. This embodiment is the same as the embodiment shown in FIG. 1, except that dot density setting means 6 and dot density storage section 7 are added.

〔Effect of the invention〕

As explained above, in the present invention, when low-noise printing is commanded, a calculation section calculates the printing dot density of one line, and a preset dot density is compared with the dot density calculated by the calculation section. By having a control unit that performs low-noise printing only when the dot density is higher than a preset dot density, even when low-noise printing is commanded, the dot density is low and the dots are not originally intended for low-noise printing. Low-noise printing is not performed on lines that do not need to be executed, which has the effect of preventing the processing speed from lowering more than necessary.

[Brief explanation of the drawing]

1 and 2 are block diagrams of embodiments of the present invention. 1...Print pattern development section, 2...Dot density calculation section, 3...Low noise printing control section, 4
...Print control section, 5...Drive section, 11
...Print data, 12...Print pattern data, 21...Low noise printing command, 22...
...Dot density information, 31...Low noise printing execution signal.

Claims (2)

[Claims] (1) In a dot serial printer that has a function of switching between normal printing and low-noise printing by a command from a host device or an operator's operation, there is a calculation unit that calculates the printing dot density of one line, and a preset dot density and the 1. A dot serial printer comprising: a control section that compares the dot density calculated by the calculation section with the dot density calculated by the calculation section and performs control to perform low-noise printing only when the dot density is higher than a preset dot density. (2) further comprising a dot density setting means for setting a dot density at which low-noise printing should be performed, and a storage section for storing the dot density set by the setting means, the dot density stored in the storage section; The dot serial printer according to claim 1, wherein: is the preset dot density.