JPS59190867A - Printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a printing apparatus using a thermal dot printing method.

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Mr. [Technical background of the invention and its problems] Currently, printing devices based on the thermal dot printing method are used in many fields. In addition, various printing methods have been devised for the printing apparatus, not only for printing in one color but also for printing in multiple colors. For example, to take advantage of the difference in color development due to heating temperature, it is possible to create iJ colors by providing a low-temperature printing section and a high-temperature printing section, or by changing the temperature applied to different transfer ribbons in thermal transfer. Even if it is known that printing in multiple colors can be performed simultaneously using the same head, it has not yet been realized.

[Purpose of the invention]

The present invention has been made in view of the above circumstances, and an object thereof is to provide a printing device that can simultaneously print in multiple colors using a thermal dot printing method.

[Summary of the invention]

^ -2- This invention divides the printing of at least one dot line into different printing times for each color, transfers the print data to the thermal head in accordance with the divided time width, and after this transfer, prints the print data for each color. By driving the heating element of the thermal head according to the printing type in the printing time width, printing is performed by melting the luminescent elements of different colors at different temperatures.

[Embodiments of the invention]

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

FIG. 1 schematically shows an internal mechanism '(il), in which a sheet P is conveyed along a conveyance path l and conveyed to a transfer section 2. As shown in FIG.

The paper P conveyed to the transfer section 2 is conveyed without being pressed by the transfer paper 4 and the thermal head 5 by the platen 3.

Thereby, the ink on the transfer paper 4 is transferred onto the paper P by the action of the thermal head 5.

The platen 3 is driven by a motor 6. Then, the transfer paper 4 wound on the reel 7
is transferred via a roller (not shown) and the transfer unit 2.
Guidance to IJ-le 8! 1. It is designed to be wound up by the end-of-life reel 8. The paper P is conveyed on the conveyance path 1 and then discharged to a paper discharge tray. The thermal head 5d is arranged in a line (not shown) and is composed of heat generating resistors, 1-+, etc., and can be driven by a driver (not shown) when the thermal resistor is inactive.

As shown in FIG. 2, the transfer paper 4 has a red fill ink layer 43 laminated thereon. The black ink layer 42 is composed mainly of resin and gold, and the ink layer 42 has a high melting temperature.
By heating the opposite side of the ink surface with a heating resistor (not shown), the ink M corresponding to the heated temperature is divided and transferred onto the paper P. ing.

FIG. 3 shows the main parts of the electric circuit.

That is, the CPTJ 11 controls the whole, and its nutat signal and stop signal are respectively supplied to the set input terminal and reset input terminal of the (FF circuit) 12. The set output of the circuit 12 is supplied to one input terminal of an AND circuit 13, and is also supplied to the reset input terminal of an oscillation circuit 14. This oscillation circuit 14 generates chronographs and pulses of two different periods. Tomorrow, the clock pulse of
6 to the input terminal of the timing generation circuit 17. The timing generation circuit 15 is configured to output a logic "1" signal, that is, the print request signal A, for a predetermined period of time in response to the rise of the clock pulse, and the timing generation circuit 17 is configured to output a logic "1" signal, that is, the print request signal A, in response to the fall of the clock pulse. For a predetermined period of time, a logic "1" signal is output, and the print request signal B is output. The above timing generation circuit 15.
The output of 17 is sent to the AND circuit 13 via the NOR circuit 18.
is supplied to the other input terminal of the CPU II. The CPU 11 is the timing generation circuit 1.
Determine the print requester based on the output of 5, and select 1 corresponding to red.
Either a line's worth of print data is output from the data output terminal I11, or print request B is determined based on the output of the timing generation circuit 17, and one line's worth of print data corresponding to black is output from the data output terminal 111. It has become. Print data from the output terminal 111 of the CPU 11 and clock pulses from the output terminal 112 are supplied to the shift register 19. The outputs from the output terminals Q1 to Qn of the shift register 19 are each output to a NAND circuit 201.
20n, and the AND circuit 1 is supplied to the other input terminal of these NAND circuits 201 to 20n.
3 output redrive r-) signal (logic "1" signal) is provided. The upper six NAND circuits 2θl to 20n open their gates in response to the drive dirt signal, and open the corresponding heating resistor (heating element) in response to the output signal from the output terminals Q1 to Qn of the corresponding shift register 19. )211-21
The button is arranged so that the nVC power supply voltage ■cc is applied.

Here, the shift register 19, NAND circuit 201~
20n and the heating resistors 21 to 21n constitute the thermal head 5.

Further, the CPU 1 outputs a drive signal to the transport motor drive circuit 22 when printing for print requests A and B is completed. The transport motor drive circuit 22
The paper is conveyed by the distance of the pil line tod by driving the mokuro according to the drive signal.

Next, the operation in such a configuration will be explained with reference to the flowchart-q shown in FIG.

For example, assume that the CPU I1 outputs a start signal. Then, the F/R circuit 12 is turned 7-L, and the oscillation circuit 14 is reset by this set output, and the dart of the AND circuit 13 is opened.

As a result, clock pulses with different periods are output from the oscillation circuit 14. The rise of this clock pulse causes
A print request code A is output from the timing generation circuit 15 and supplied to the CPU 11 . This signal causes the CPU
11 determines the print requester and outputs the mark 81.1 data for one line for low-temperature coloring round red to the output terminal 111.
Output from. Then, the print data is stored in the shift register 23, and signals are output from the corresponding output terminals Ql-Qn. Then, when the timing generation circuit 15 no longer outputs the print request code A, the NOR circuit 18 outputs the logic It I I + times signal. Then, the AND circuit 13 is established, and the drive dirt signal from the AND circuit 13 is output to the NAND circuits 201-20n.

As a result, the NAND circuits 201 to 20n connect the heating resistors 211 to 21n corresponding to the outputs of the output terminals Q1 to Qn of the shift register 23 to the power supply voltage V. Press C to drive for a short heat generation time T. As a result, the head generates heat at a low temperature, so that the red ink layer 43 of the transfer paper 4 corresponding to the heat generating resistors 211 to 21n is melted and dot-transferred onto the paper P.

Then, as the clock pulse falls υ, the timing generation circuit 17 outputs the print request signal B, and the CPU 11 outputs the print request signal B.
supplied to Based on this signal, the CPU I 1 determines the print request B and outputs print data for 1 line tod for high-temperature coloring, that is, black, from the output terminal 11 s.

Then, this print data is stored in the shift register 23, and a signal is output from the corresponding output terminal Qt-Q41. Next, when the print request signal B is no longer output from the timing generation circuit 17, the logic "1'" is output from the NOR circuit 18.
'' signal is output. Then, the AND circuit 13 is established, and the drive dirt signal from the AND circuit 13 is output to the NAND circuits 201 to 2on. Output end Q of
Each heating resistor 211 to 21n corresponding to the output of 1 to Qn
is the power supply voltage V. , and is driven for a long heat generation time TH.

As a result, the henodal temperature is high and heat is generated, so the heating resistor 211 to 21nK corresponds to transcription introduction 4.
The black and red ink layers 42 and 43 are melted and dot-transferred onto the paper P. At this time, since the black ink is superior to the red ink by 9, it is as if black dot transfer had not been performed.

Thereafter, each time the sheet Pf is conveyed by one dot, the red and black colors are transferred in the same manner as described above. As a result,
As shown in FIG. 6, red printed characters 31 and black printed characters 32 are printed on the introduction P.

Note that the signal waveforms of each part to explain the above operation are shown in the fourth section.
It is as shown in the figure.

In the above embodiments, the case where transfer paper printing is performed using transfer paper has been described, but the present invention is not limited to this, and the same effect can be applied when direct printing is performed without using transfer paper. This place,
In this case, as shown in FIG. 7, the paper has a black coloring layer 42 with a high melting temperature and a red coloring layer 43 with a low melting temperature laminated on the base 4, and the thermal head 44 is heated at a low temperature. When heat is generated, only the red color forming layer 42 is melted,
When the red color is developed and heat is generated at a high temperature, the black and red coloring layers 43 and 42 are melted, and the black and red colors are mixed.
Aha monkey black is emitted. It looks like this. In addition, coloring layers with different melting temperatures were laminated on a film as a transfer paper, but this was not limited to this, as shown in Figure 8.
A coloring layer containing a mixture of dyes having different melting temperatures may be provided on the film. In this case, the red dye is melted at a low temperature and transferred onto the paper, and the red and black dyes are melted at a high temperature and a black color, which is superior to red, is transferred onto the paper.

Furthermore, although the case of two-color printing has been described, the present invention is not limited to this.
It is also possible to print in more than one color. Furthermore, since the ambient temperature also changes the heat generation temperature, the supplied power may be subjected to temperature correction to obtain rough and clear printing.

〔Effect of the invention〕

As described in detail above, the present invention can provide a printing device that can print in multiple colors at the same time using the thermal printing method, and can reduce the size of the device, shorten printing time, and reduce costs.

[Brief explanation of the drawing]

Figures 1 to 6 show an example of this invention.
Figure 1 is a diagram schematically showing the internal structure, Figure 2 is a diagram showing the ink layer of the transfer paper, Figure 3 is a diagram showing the configuration of the main parts of the electric circuit, Figure 4 is FIG. 5 is a flowchart for explaining the entire operation; FIG. 6 is a diagram showing a printing example; FIG. 7 is a diagram showing paper of another embodiment; FIG. 8 is a diagram showing an example of the structure of a transfer paper according to another embodiment. - Mul head, 11... CPU, 12... FF circuit, 14... Oscillation circuit, 15.17... Timing occurrence Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 3 Figure 14 Figure 4 Figure 5 Figure 6 Figure 1 2 Figure 7 Figure 8

Claims (1)

[Claims] Coloring bodies of different colors melt according to the difference in the heat generation temperature of the thermal head, so that the printing device that performs printing divides printing for at least one dot line into different printing times for each color. a dividing means; a transfer means for transmitting the print data to the thermal head in accordance with the time widths divided by the means; a printing device for printing by melting the coloring bodies of different colors at different temperatures by driving a heating element of a thermal head in accordance with the temperature of the heating element of the thermal head.