Pixel preheat system for an automated thermal transfer device

Details Pixel preheat system for an automated thermal transfer device Pixel preheat system for an automated thermal transfer device

Filed on

1988-03-21

Date issued

1989-08-22

Examiner

Eickholt, Eugene H.

Patent Class

Typewriting machines

SubClass

Typing by other than type-face or type-die

SubSubClass

Thermal

Other Related Categories

346 76PH, 219216, B41J 302, G01D 1510

Type

Patent

Status

active

Patent number

048590932

Description

ABSTRACT:
A pixel preheat system for a thermal transfer device in which a selected image is transferred from a strip of color carrying ribbon to a strip of image carrying tape achieves precise control of the temperature of the individual pixel heating elements in a thermal printhead by combining the pixel data values just printed with the pixel data values to be printed to generate a pixel preheat value whenever either of the pixel data values is off or white. The present invention maintains the temperature of the individual pixel heating elements closer to the transition temperature of the thermal transfer ribbon and uses fewer circuit components.

REFERENCES:
patent: 4674895 (1987-06-01), Tanaka et al.
patent: 4699531 (1987-10-01), Ulinski et al.
patent: 4724446 (1988-02-01), Hirahara
patent: 4758966 (1988-07-01), Brooks et al.

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