JPH01297266A - Thermal recorder - Google Patents

Abstract

PURPOSE:To keep coloring density constant even when thermal recording paper other than specified thermal recording paper is used, by a method wherein a preliminarily prepared reference pulse width data is corrected based on recording characteristics of thermal recording paper. CONSTITUTION:A senser 1 outputs a code data 2 for reading a bar code 13 expressing recording characteristics of thermal recording paper sticked onto an inner side of a recording paper winding frame 14 existing at a center of the thermal recording paper 12. A decoder 3 reads the code data 2 to be converted to a correction data 4 of the code date 2 together with the thermal recording paper. A correction circuit 9 reads a reference pulse width data 6 corresponding to a temperature data and a printing cycle data from a table of a memory 5 based on a temperature data 7 and a printing cycle data 8 of a heating resistor of a thermal head 11, performs correction by correction data 4, which is converted to a correction pulse with data 10 together with thermal recording paper, and printing is performed on the thermal recording paper 12 with the thermal head 11 by keeping constant coloring density.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a thermal recording device, and particularly to a thermal recording device that determines the pulse width of printing based on temperature data of a thermal head and printing cycle data.

[Conventional technology]

Conventionally, this type of thermal recording device stores printing pulse width data determined by the printing cycle and temperature in a table format in memory, and calculates the color density of a specific thermal recording paper at each printing cycle and temperature. It was controlled to remain constant.

[Problem to be solved by the invention]

The conventional thermal recording devices described above only have pulse width data for printing on the thermal recording paper specified by each device, so if a thermal recording paper other than the specified thermal recording paper is used, the pulse width data will be constant. The disadvantage is that the color density cannot be maintained.

[Means to solve the problem]

The present invention relates to a thermal recording device that prints on thermal recording paper by driving a thermal head having heating resistors arranged in a line, in which recording conditions of the thermal recording paper written on the thermal recording paper are indicated. A sensor that reads code data, a decoder that decodes the read code data and outputs correction data, and stores a plurality of reference pulse width data corresponding to temperature data and print cycle data for the thermal head in a table format. It is configured to include a memory, and a correction circuit that reads out corresponding reference pulse width data based on the temperature data and the printing cycle data and outputs corrected pulse width data corrected using the correction data.

〔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, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a perspective view of a thermal recording paper used in the illustrated embodiment.

In FIG. 1, sensor 1 is a barcode reader;
As shown in the figure, code data 2 is output by reading a bar code 13 representing the recording characteristics of the thermal recording paper 12, which is pasted with a sticker or the like on the inside of the recording paper roll frame 14 at the center of the thermal recording paper 12.

The decoder 3 decodes the code data 2 read by the sensor 1 and converts it into correction data 4 for each thermal recording paper.

The correction circuit 9 reads reference pulse width data 6 corresponding to the temperature data and printing cycle data from the table in the memory 5 based on the temperature data 7 of the heating resistor of the thermal bed 11 and the printing cycle data 8, and corrects it using the correction data 4. and convert it into corrected pulse width data 10 for each thermal recording paper,
Printing is performed on thermal recording paper 12 with a thermal head 11.

〔Effect of the invention〕

As explained above, the present invention corrects the reference pulse width data prepared in advance based on the recording characteristics of the thermal recording paper, thereby making it possible to use thermal recording paper other than the thermal recording paper specified for each device. This has the effect of maintaining a constant color density even when

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a perspective view of a thermal recording paper used in the illustrated embodiment. 1... Sensor, 2... Code data, 3... Decoder, 4... Correction data, 5... Memory, 6...
Reference pulse width data, 7... Temperature data, 8... Print cycle data, 9... Correction circuit, 10... Correction pulse width data, 11... Thermal head, 12... Thermal recording paper , 13... Barcode, 14... Recording paper roll frame.

Claims (1)

[Claims] In a thermal recording device that prints on thermal recording paper by driving a thermal head having heating resistors arranged in a line, code data written on the thermal recording paper indicating the recording conditions of the thermal recording paper is read. a sensor, a decoder that decodes the read code data and outputs correction data, a memory that stores a plurality of reference pulse width data in a table format corresponding to temperature data and print cycle data for the thermal head; A thermal recording device comprising: a correction circuit that reads out corresponding reference pulse width data based on temperature data and the printing cycle data, and outputs corrected pulse width data corrected using the correction data.