JPH02258356A - Thermal transfer recorder - Google Patents

Abstract

PURPOSE:To realize an accurate recording control by providing a correction circuit which reads correction data outputted from a decoder and reference pulse width data corresponding to printing cycle data and thermal head temperature data, which are outputted from a memory, and outputs correction pulse width data. CONSTITUTION:Environment temperature data 2 read by an environment temperature sensor 1 is decoded by a decoder 3 and outputted to a correction circuit 5 as correction data 4. On the other hand, thermal head temperature data 8 read from a thermal head temperature sensor 7 for measuring the temperature of a thermal head 6 and printing cycle data 9 are inputted to a memory 10. In the memory 10, reference pulse width data is prestored, and reference pulse width data 11 is read from an address assigned by the inputted thermal head temperature data 8 and the printing cycle data 9 to be outputted to the correction circuit 5. In accordance with the reference pulse width data 11 and the correction data 4, the correction circuit 5 outputs correction pulse width data 12 to the thermal head 6, and printing is conducted.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a thermal transfer recording device, and more particularly to a thermal transfer recording device that determines a printing pulse width based on temperature data of a thermal head and environmental temperature data.

Conventional technology Conventionally, this type of thermal transfer recording device stores data on the printing pulse width, which is determined only by the printing cycle and the temperature data of the thermal head, in a table format in memory, and transfers the data from the thermal transfer film to the recording paper. The printing density was controlled to be constant at each printing period and at each temperature.

Problems to be Solved by the Invention The conventional thermal transfer recording device described above does not control the environmental temperature of the thermal transfer film and recording paper, so the density during recording is not constant and continuous recording is performed. The drawback is that it is not possible to control the effects of reverse transcription that occur at times.

The present invention has been made in view of the above-mentioned conventional situation,
Accordingly, an object of the present invention is to provide a novel thermal transfer recording apparatus that eliminates the above-mentioned drawbacks inherent in the conventional technology and makes it possible to realize more accurate recording control.

Means for Solving the Problems In order to achieve the above object, a thermal transfer recording device according to the present invention prints from a thermal transfer film onto a recording paper by driving a thermal head having heating resistors arranged in a line. In a thermal transfer recording device that performs a memory for storing reference pulse width data corresponding to print cycle data and thermal head temperature data for the head in a table format; correction data output from the decoder; print cycle data output from the memory; and a correction circuit that reads reference pulse width data corresponding to the temperature data and outputs corrected pulse width data.

Embodiment Next, a preferred embodiment of the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, environmental temperature data 2 read from an environmental temperature sensor 1 is decoded by a decoder 3.

It is output to the correction circuit 5 as correction data 4. Further, thermal head temperature data 8 and print cycle data 9 read from a thermal head temperature sensor 7 that measures the temperature of the thermal head 6 are input to a memory 10. memory 10
The reference pulse width data is stored in the memory 10.
Reference pulse width data 11 is read from the address specified by the input thermal head temperature data 8 and print cycle data 9 and is output to the correction circuit 5. The correction circuit 5 outputs corrected pulse width data 12 from the reference pulse width data 11 and correction data 4 to the thermal head 6 for printing.

As described in detail, according to the present invention, by correcting the reference pulse width data not only from the temperature data of the thermal head but also from the environmental temperature data of the thermal transfer film and recording paper, - The effect of being able to perform layer-reliable recording control is obtained.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a thermal recording apparatus according to the present invention. 1... Environmental temperature sensor, 2... Environmental temperature data, 3
... Decoder, 4... Correction data, 5... Correction circuit, 6... Thermal head, 7... Thermal head temperature sensor, 8... Thermal head temperature data, 9...
...Print cycle data, lO...memory, 11...standard pulse width data 12...corrected pulse width data Patent applicant: NEC Corporation Representative, Patent attorney: Yutabe Kumagai

Claims (1)

[Claims] In a thermal transfer recording device that prints from a thermal transfer film onto recording paper by driving a thermal head having heating resistors arranged in a line, an environmental temperature sensor for measuring environmental conditions of the thermal recording device; A decoder that decodes temperature data read from the environmental temperature sensor and outputs correction data, and stores reference pulse width data corresponding to print cycle data and thermal head temperature data for the thermal head in a table format. memory and
The apparatus is characterized in that it includes a correction circuit that reads reference pulse width data corresponding to the correction data output from the decoder, the print cycle data and the thermal head temperature data output from the memory, and outputs the correction pulse width data. Thermal transfer recording device.