Color thermal printer
AssigneeFuji Photo Film Co., Ltd.
InventorsShinji Hayashi, Hisashi Enomoto
Life of this patent
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Abstract
A color thermal printer has thermal heads for recording yellow, magenta and cyan mono-color image, respectively. An mono-color image data of each mono-color image is processed in image data processing section, and thereafter sent to the thermal head. A correction CPU for each mono-color image reads out mono-color image data at each line to calculate a transport friction fluctuation at the thermal head between recording line and a first previous line thereto. Further, the correction CPU calculates a correction of heat energy of the thermal head on the basis of all of the transport friction fluctuation of the thermal heads.
Claims11
A color thermal printer for printing full-color images in a continuous color thermosensitive recording paper in which first-Nth coloring layers are formed on a base for respectively coloring, N mono-color images being recorded in different print areas of said color thermosensitive recording paper almost simultaneously to print said full-color images sequentially, said color thermal printer comprising:
- first-Nth thermal heads provided for said respective first-Nth coloring layers, each of said first-Nth thermal heads having plural heat elements which are arranged in a main-scanning direction, each heat element contacting to said color thermosensitive recording paper, and being driven on a basis of corrected mono-color image data to apply a heat energy for coloring to said coloring layer, and to record said mono-color image line by line;
- first-Nth platen roller confronting to said first-Nth thermal heads respectively for supporting said color thermosensitive recording paper pressed by said first-Nth thermal heads;
- and
- a calculation means to calculate for each line a friction between each thermal head and said color thermosensitive recording paper on basis of a heat energy corresponding to a mono-color image data at each thermal head, and to calculate a transport friction fluctuation according to said frictions between a recording line and a first previous line, said mono-color image data of said Kth thermal head being adjusted on the basis of all of said transport friction fluctuations of first-Nth thermal heads to become said corrected mono-color image data of said Kth thermal head, while K satisfies 1≦K≦N.
A color thermal printer for printing full-color images in a continuous recording paper of which first-Nth mono-color images are recorded in different print areas almost simultaneously to print said full-color images sequentially, said color thermal printer comprising:
- first-Nth thermal heads provided for said respective first-Nth color images, each of said first-Nth thermal heads having plural heat elements which are arranged in a main-scanning direction, and being driven on a basis of corrected mono-color image data to apply a heat energy to record said mono-color image line by line;
- first-Nth platen roller confronting to said first-Nth thermal heads respectively for supporting said recording paper pressed by said first-Nth thermal heads;
- and
- a calculation means to calculate for each line a friction between each thermal head and said recording paper on basis of a heat energy corresponding to a mono-color image data at each thermal head, and to calculate a transport friction fluctuation according to said frictions between a recording line and a first previous line, said mono-color image data of said Kth thermal head being adjusted on the basis of all of said transport friction fluctuations of first-Nth thermal heads to become said corrected mono-color image data of said Kth thermal head, while K satisfies 1≦K≦N.
Dependencies are inferred from the claim text.