Printing apparatus, control method of the apparatus, and computer-readable memory
AssigneeCanon Kabushiki Kaisha
InventorsHiroyuki Niimura, Hiroshi Tajika, Norihiro Kawatoko
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Abstract
A head unit detects the temperature of its internal printhead a plurality of number of times, and generates a plurality of digital signals corresponding to respective temperatures. The head unit determines a digital signal used as the temperature of the printhead on the basis of the generated digital signals. The head unit transmits the determined digital signal to a main unit having a main PCB. The main unit receives the digital signal transmitted from the head unit. The main unit executes printing control of the printhead based on the received digital signal.
Claims34
A printing apparatus for executing printing control of a printhead on the basis of a temperature of the printhead, comprising:
- generation means for detecting a temperature of the printhead a plural number of times and generating a plurality of digital values corresponding to respective temperatures;
- determination means for determining a digital value representing the temperature of the printhead on the basis of the plurality of digital values generated by said generation means;
- and
- execution means for executing printing control of the printhead on the basis of the digital value determined by said determination means,
- wherein said generation means is provided in a head unit that includes the printhead.
A control method of a printing apparatus having a head unit with a printhead and a main unit with a control circuit for executing printing control of the printhead, comprising:
- a generation step of detecting a temperature of the printhead a plural number of times and generating a plurality of digital values corresponding to respective temperatures;
- a determination step of determining a digital value representing the temperature of the printhead on the basis of the plurality of digital values generated in the generation step;
- and
- an execution step of executing printing control of the printhead on the basis of the digital value determined in the determination step,
- wherein the generation step is performed in the head unit.
A computer-readable memory storing program codes of control of a printing apparatus having a head unit with a printhead and a main unit with a control circuit for executing printing control of the printhead, comprising:
- a program code of a generation step of detecting a temperature of the printhead a plural number of times and generating a plurality of digital values corresponding to respective temperatures;
- a program code of a determination step of determining a digital value representing the temperature of the printhead on the basis of the plurality of digital values generated in the generation step;
- and
- a program code of an execution step of executing printing control of the printhead on the basis of the digital value determined in the determination step,
- wherein the generation step is performed in the head unit.
A printing apparatus for receiving temperature information output as a digital value from a printhead, changing a driving condition of the printhead in accordance with the temperature information, and performing printing,
- wherein, depending on a temperature range, a temperature width for switching the driving condition of the printhead is changed in accordance with the output temperature information.
A printing apparatus for executing printing control of a printhead on the basis of a temperature of the printhead, comprising:
- generation means for detecting a temperature of the printhead a plurality of number of times and generating a plurality of digital values corresponding to respective temperatures;
- determination means for determining a digital value representing the temperature of the printhead on the basis of the plurality of digital values generated by said generation means;
- and
- execution means for executing printing control of the printhead on the basis of the digital value determined by said determination means,
- wherein said determination means has discrimination means for, when said generation means detects the temperature of the printhead an odd number of times and generates an odd number of digital values corresponding to respective temperatures, discriminating kinds of digital values constituting the odd number of digital values, and
- said determination means determines a digital value representing the temperature of the printhead from the odd number of digital values on the basis of a discrimination result of said discrimination means.
Dependencies are inferred from the claim text.