JPH01249364A - Thermal recording system - Google Patents

Abstract

PURPOSE:To prevent not only the generation of transmission irregularity due to the transmission delay of a driving system but also that of the density irregularity between printing blocks accompanied by the load fluctuation of a power supply, by dividing a heat generating resistor into N heat generating elements and setting M heat generating elements positioned at an equal interval to one block to perform printing. CONSTITUTION:A data register 12 accumulating the image data 10 corresponding to one line, a heat generating resistor 14 wherein many heat generating elements performing printing to recording paper are parallelly arranged in one row, a driving part 13 for driving said heat generating resistor 14 and a control part 11 are provided to the title system. The image data 10 corresponding to one line to be recorded is inputted to the data register 12 under the control of a printing control part 11 and, thereafter, the driving part 13 divides the heat generating resistor 14, for example, into blocks (1)-(4) when the first block printing signal from the control part 11 becomes an enabling state and, with respect to the respective dots positioned at an equal interval of the first block (1), printing is performed according to the content of the data register 12. Hereinafter, the driving part 13 successively performs printing with respect to the second-fourth blocks in the same way to complete the printing of the image data for one line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal recording system, and more particularly to a thermal recording system for a thermal head used in a facsimile machine or the like.

[Conventional technology]

Conventionally, this type of thermal recording method divides the heating resistor for thermal printing into multiple groups and prints sequentially for each group, and when printing black, each resistor is energized. Printing was performed using In this case, the power consumption in each group is maximum during continuous black printing.

[Problem to be solved by the invention]

The conventional heat-sensitive recording method described above has 1
Because the line is divided into blocks composed of adjacent heating resistors and each block is printed sequentially, unevenness in feeding caused by transmission delays in the drive system and density between printing blocks due to power supply load fluctuations occur. There is a drawback that unevenness appears conspicuously between the leading edge and the trailing edge of the line in the recorded image.

[Means to solve the problem]

The thermal recording method of the present invention includes a data register that stores one line of image data, a heating resistor in which a plurality of heating elements are arranged in a line to print on recording paper, and a heating resistor that drives the heating resistor. and a control section that divides the heat generating resistor into N parts and prints the M heat generating elements positioned at equal intervals as one block.

〔Example〕

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

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of a printing block for explaining this embodiment.

The embodiment shown in FIG. 1 includes a data register 12 for storing one line of image data 10, a heating element for printing on recording paper, a plurality of heating resistors 14 arranged in parallel in a row, and a heating resistor for printing on recording paper. The heating resistor 1
4 is divided into four parts and M number of heat generating elements (432 pieces when there are 1728 heat generating elements) located at equal intervals are printed as one block.

In this way, both data for one line to be recorded
0 is input to the data register 12 under the control of the print control unit 11, and when the first block print signal from the control unit 11 is enabled, the drive unit 13 divides the heating resistor 14 into four parts from ■ to ■. Then, printing is performed according to the contents of the data register 12 for each dot in the first block (2) in FIG.

Thereafter, under the control of the control section 11, the driving section 13 can sequentially print the second to fourth blocks in the same manner, and finish printing one line of image data.

〔Effect of the invention〕

As explained above, the present invention divides a heat generating resistor into N parts and prints M heat generating elements located at equal intervals as one block. This has the effect that density unevenness between print blocks does not occur between the leading edge and the trailing edge of the line of the recorded image.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is a configuration diagram of a print block for explaining this embodiment, and Fig. 3 is a print block diagram for explaining an example of a conventional angry heat recording method. It is a block diagram. 11...control unit, 12...data register, 13.
... Drive unit, 14... Heat generating resistor.

Claims (1)

[Claims] a data register for storing image data for one line; a heating resistor having a plurality of heating elements arranged in parallel in a row for printing on recording paper; a driving section for driving the heating resistor; and the heating resistor. 1. A heat-sensitive recording method, comprising: a control unit that divides the body into N parts and prints the M heat-generating elements positioned at equal intervals as one block.