| US 7,559,626 B2 | ||
| Inkjet recording head substrate and drive control method, inkjet recording head, inkjet recording head cartridge and inkjet recording apparatus | ||
| Masataka Sakurai, Kawasaki (Japan); Tatsuo Furukawa, Zama (Japan); Hidenori Watanabe, Zama (Japan); Nobuyuki Hirayama, Fujisawa (Japan); and Ryo Kasai, Setagaya-ku (Japan) | ||
| Assigned to Canon Kabushiki Kaisha, Tokyo (Japan) | ||
| Filed on Nov. 30, 2005, as Appl. No. 11/289,697. | ||
| Claims priority of application No. 2004-357182 (JP), filed on Dec. 09, 2004; and application No. 2004-357184 (JP), filed on Dec. 09, 2004. | ||
| Prior Publication US 2006/0139412 A1, Jun. 29, 2006 | ||
| Int. Cl. B41J 2/14 (2006.01) | ||
| U.S. Cl. 347—50 [347/9; 347/10; 347/11; 347/12] | 13 Claims |
| 1. An inkjet recording head substrate having a plurality of electrothermal transducers for generating thermal energy used
to discharge one color ink and a plurality of drive elements for respectively driving the plurality of electrothermal transducers
mounted thereon comprising:
one ink supply port;
a first circuit portion which receives an input signal of a first voltage amplitude level and which outputs block selection
signals and device driving signals at a second voltage amplitude level higher than the first voltage; and
a second circuit portion which receives the block selection signals and the device driving signals output from the first circuit
portion and which outputs control signals for controlling drive elements corresponding to electrothermal transducers to be
driven,
wherein the block selection signals are signals for selecting a block to be driven from a plurality of blocks each including
electrothermal transducers installed with respect to the one ink supply port,
wherein the device driving signals are signals for driving each of the electrothermal transducers included in the block selected
by the block selection signals in accordance with image data regarding the one ink supply port, and
wherein said second circuit portion comprises a NOR circuit corresponding to each of the plurality of electrothermal transducers.
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