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US 6,742,874 B2Granted
Printhead substrate inputting a data signal and a clock signal, printhead, printhead cartridge, and printer thereof
AssigneeCanon Kabushiki Kaisha
InventorsNobuyuki Hirayama, Tatsuo Furukawa, Yoshiyuki Imanaka
Life of this patent
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Abstract
Printhead substrate for inputting a data signal (DATA) in synchronization with a clock signal (CLK). The printhead substrate comprises: input terminals inputting the clock signal and data signal; shift registers inputting and maintaining the data signal in synchronization with the clock signal inputted from the input terminals; and a time lag adjuster arranged between an input terminal and the shift register to adjust a time lag of at least one of the clock signal or data signal. By virtue of adjusting the time lag by the time lag adjuster, setup time and hold time between the clock signal and the data signal inputted to the shift register is ensured.
Claims20
A printhead substrate inputting a data signal in synchronization with a clock signal, comprising:
- a plurality of printing elements;
- input terminals adapted to input the clock signal and the data signal;
- a register adapted to input the clock signal and the data signal inputted from said input terminals, and latch the data signal in synchronization with the clock signal;
- a time lag adjusting circuit adapted to be arranged between at least one of said input terminals and an input of said register to adjust a relative relation of transitional timings of the clock signal and the data signal by adjusting a time lag of at least one of the clock signal or the data signal;
- and
- a driver circuit adapted to drive said plurality of printing elements based on the data signal latched in said register.
3 more elements
A printhead comprising:
- a plurality of printing elements;
- input terminals adapted to input a clock signal and a data signal;
- a register adapted to input the clock signal and the data signal inputted from said input terminals, and latch the data signal in synchronization with the clock signal;
- a time lag adjusting circuit adapted to be arranged between at least one of the input terminals and an input of said register to adjust a relative relation of transitional timings of the clock signal and the data signal by adjusting a time lag of at least one of the clock signal or the data signal;
- and
- a driver circuit adapted to drive said plurality of printing elements based on the data signal latched in said register.
3 more elements
A printhead cartridge comprising:
- a plurality of printing elements;
- input terminals adapted to input a clock signal and a data signal;
- a register adapted to input the clock signal and the data signal inputted from said input terminals, and latch the data signal in synchronization with the clock signal;
- a time lag adjusting circuit adapted to be arranged between at least one of the input terminals and an input of said register to adjust a relative relation of transitional timings of the clock signal and the data signal by adjusting a time lag of at least one of the clock signal or the data signal;
- a driver circuit adapted to drive said plurality of printing elements based on the data signal latched in said register;
- and
- an ink tank adapted to contain ink to be supplied to said plurality of printing elements.
4 more elements
A printer comprising:
- a printhead including:
- a plurality of printing elements;
- input terminals adapted to input a clock signal and a data signal;
- a register adapted to input the clock signal and the data signal inputted from the input terminals, and latch the data signal in synchronization with the clock signal;
- a time lag adjusting circuit adapted to be arranged between at least one of the input terminals and an input of the register to adjust a relative relation of transitional timings of the clock signal and the data signal by adjusting a time lag of at least one of the clock signal or the data signal;
- and
- a driver circuit adapted to drive the plurality of printing elements based on the data signal latched in said register;
- an ink tank adapted to contain ink to be supplied to the plurality of printing elements;
- input means for inputting image data from an external apparatus;
- and
- data supply means for generating the data signal based on image data inputted by said input means, and supply the data signal to said printhead.
8 more elements
A printer comprising
- a head cartridge including:
- a plurality of printing elements;
- input terminals adapted to input a clock signal and a data signal;
- a register adapted to input the clock signal and data inputted from the input terminals and latch the data signal in synchronization with the clock signal;
- a time lag adjusting circuit adapted to be arranged between at least one of the input terminals and an input of the register to adjust a relative relation of transitional timings of the clock signal and the data signal by adjusting a time lag of at least one of the clock signal or the data signal;
- a driver circuit adapted to drive the plurality of printing elements based on the data signal latched in said register;
- and
- an ink tank adapted to contain ink to be supplied to the plurality of printing elements;
- input means for inputting image data from an external apparatus;
- and
- data supply means for generating the data signal based on image data inputted by said input means, and supply the data signal to signal head cartridge.
8 more elements
Dependencies are inferred from the claim text.