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US 6,474,764 B2Granted
Control circuit for driving a print head of a printing apparatus
AssigneeBenq Corporation
InventorsChih-Hung Kao, Yu-Fan Fang
Life of this patent
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AssigneeBenq Corporation
InventorsChih-Hung Kao, Yu-Fan Fang
Estimating the term…
A control circuit for driving a print head of a printing apparatus is disclosed. The print head has a plurality of heating elements and a plurality of ink chambers. Each ink chamber stores ink and has a nozzle. The control circuit includes a thermometer for measuring a temperature of the ink chambers, and a processor for generating a heating signal according to printing data transmitted from the printing apparatus to drive heating elements to heat ink chambers corresponding to nozzles which will jet ink. The processor also generates a pre-heating signal to drive the heating elements according to the temperature measured by the thermometer. When necessary, the processor will generate the pre-heating signal in addition to generating the heating signal so as to provide additional energy to drive the heating elements corresponding to the nozzles which will jet ink.
A control circuit for driving a print head of a printing apparatus, the print head comprising a plurality of heating elements and a plurality of corresponding ink chambers, each ink chamber being used for storing ink and having a nozzle, the control circuit comprising:
A method for providing a pre-heating signal to a heating element of a nozzle on a print head in a printing process so as to compensate energy accumulation differences between different nozzles on the print head, the method comprising:
A method for providing a pre-heating signal to a heating element of a nozzle on a print head in a printing process so as to compensate energy accumulation differences between different nozzles on the print head, the method comprising:
Dependencies are inferred from the claim text.