JPS6261474A - Printing device - Google Patents

Abstract

PURPOSE:To effectively enhance a representing reproduction by increasing the number of converting outputs. CONSTITUTION:For the number of gradations of the copying data inputted externally, the gradation partition number is increased by a converting table, and the partition number of an energizing time is increased. The conversion is performed by a general ROM, and the output pit number is always set at a larger number, for instance, when an input is the six bit data, an output is the seven bit data. After this conversion, A copying is carried out by a printer having an energy to output optical density, thereby the input data can be reproduced in an output printing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a color printing device for multi-gradation printing, which is equipped with a line head or a serial head.

[Conventional technology]

Conventionally, this type of printing device uses an external input device or
It is common to use internal analog-to-digital conversion processing to convert digital data with gradations into one time-division data using time-division conversion control, and to control one energization time to express gradations. be. The basic unit of one hour during this time division conversion is determined by the bit count of the input digital data. For example, in the case of 4 bits,
When the maximum solubility is 1, 1/16 is the basic unit time. For 6 bits, 1/64 is the basic unit time. By combining these basic times, there are 16 gradations or 6
It expresses 4 gradations.

[Invention b-Problems to be solved 5] The conventional method of expression is based on the number of data bits.

When the number ht of gradation expressions is determined and the gradation expressivity is corrected (r correction) by the expression medium, the number of gradation expressions is reduced. The purpose is to prevent this reduction and express rich gradations using the minimum number of input bits.

[Elaborate means of solving problems]

This printing apparatus is characterized in that the number of gradation divisions is increased using a conversion table with respect to the number of gradation levels of print data inputted from the outside, and the number of divisions of the energization time is increased.

[Effect]

According to the composition of the queen of the present invention, a full-color expression medium is provided.
Correction enables full color expression without reducing the number of gradations.

〔Example〕

Fig. 1 shows an embodiment of the present invention; 1 is a printing data input section input from the outside; a conversion table for 2-digit binary data; 3 is a nine-digit processing circuit that modulates the binary data into energization time. 5 is a processing circuit section such as a motor for 4-digit printing; 5 is a drive section such as a motor; and 5 is a 6-digit electric heat-sensitive head.

This embodiment is a system diagram of a printing device that obtains print output according to print data inputted from the outside (1), and its operation is based on the binary data conversion table (2) shown in the curve B in FIG. Performs value data conversion. This conversion is a general ROM (ReadOnly Mkasumig)
For example, when the input is 6-bit data and the output is 7-bit data, the number of output bits is always set to 5 to 5. After this conversion, the input data of the next straight line shown as A in FIG. 2 is reproduced into the output print of the straight line D in FIG. can do. At this time, by using 7 bits and 9 bits of converted output data for input data of 6 bits, the number of gradation divisions is increased, which makes it possible to increase the number of energization time divisions, increasing the ability to express gradation. can do. I will explain the details.

α, b, c, and d in A of FIG. 2 indicate 52/64, 487'64, and 64/64 gradations of input data, respectively. When data is converted using conversion table curve B, it becomes d-b' or b'-0 depending on the characteristics of the printer.
1, the interval of InputTCnray becomes narrower, and if the total number of divisions is divided into 64, the d-M or b'-do interval becomes less than the division number h'-16, and the number of gradations falling in these intervals decreases. I will do it. As in the present invention, since the number of gradations is increased from 64 to 128, even within the α'-b' or bl-CI classification, the gradation table bt exceeds 16.
It becomes possible.

In addition, although the bits in this explanation were converted using a 7-bit conversion table, 4 bits were converted to 5 bits, 5 bits were converted to 6 bits, and 7 bits were converted to 5 bits.
Conversions such as converting bits into 8 bits, converting 6 bits into 8 bits, etc. are similarly effective.

〔Effect of the invention〕

As described below, according to the present invention, by increasing the number of conversion outputs, it is possible to effectively improve assertion reproducibility.
; Becomes 5T ability.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the entire structure of the present invention. FIG. 2 is a diagram showing a method of expressing the present invention.

Claims (1)

[Claims] It is equipped with an energizing thermal head that controls the printing density according to the energizing time, a processing section for converting binary data for printing into the energizing time, and a motor and control section for printing, and a pre-conversion process. The conversion table increases the number of gradation divisions relative to the number of gradations of print data input from the outside
A full-color printing device characterized by increasing the number of divisions of energization time.