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US 4,567,488 AGranted
Thermal head drive device
AssigneeFuji Xerox Co., Ltd.
InventorsHaruhiko Moriguchi, Toshiharu Inui, Masayuki Hisatake, Takashi Ohmori
Life of this patent
Estimating the term…
Abstract
A method and device for driving a thermal head taking into consideration not only picture data already recorded and picture data on the line containing the aimed data currently being recorded, but also picture data intended to be recorded.
Claims9
A thermal head drive device for applying to an aimed data heater element of a thermal head a pulse to record aimed data in one of several lines of picture data, said device comprising:
- first means for storing data representing lines of said picture data already recorded;
- second means for storing data representing lines of said picture data intended to be recorded after the line of said picture data containing said aimed data is printed, and
- means, coupled to said first and second storing means, for determining, from the line of said picture data containing said aimed data and from said data stored in said first and second storing means, the amount of energy in said pulse to be applied to said aimed data heater element to record said aimed data.
A method of driving a thermal head to control an aimed data heater element to record aimed data in picture data, said method comprising the steps of:
- storing first lines of said picture data that have already been recorded;
- storing second lines of said pictures of data intended to be recorded after a line of said picture data containing said aimed data is printed;
- and
- determining the amount of energy to be applied to said aimed data heater element from said first and second lines of stored data and from data in said line of picture data containing said aimed data.
1 more element
Dependencies are inferred from the claim text.