Element board for printhead, and printhead having the same
AssigneeCanon Kabushiki Kaisha
InventorsNobuyuki Hirayama, Ryo Kasai, Masataka Sakurai
Life of this patent
Estimating the term…
Abstract
In a printhead element board including a plurality of printing elements which align in a predetermined direction, driving circuits which drive the printing elements, and an element selection circuit which selects printing elements within each group for each group having a predetermined number of adjacent printing elements, a plurality of element selection circuits are laid out adjacent to the driving circuits of the respective groups. With this layout, even if the number of printing elements increases, only the length in the printing element array direction increases without increasing the length in a direction perpendicular to the printing element array direction.
Claims21
An element board for a printhead comprising:
- a plurality of printing elements which align in a predetermined direction;
- driving circuits which drive said printing elements;
- an element selection circuit which selects printing elements within each group for each group having a predetermined number of adjacent printing elements, on the basis of image data;
- and
- a driving selection circuit which selects one of said printing elements in each group,
- wherein at least one of said element selection circuit and said driving selection circuit is arranged adjacent to said driving circuit of each group.
A printhead comprising:
- an element board including
- a plurality of printing elements which align in a predetermined direction,
- driving circuits which drive said printing elements,
- an element selection circuit which selects printing elements within each group, each group having a predetermined number of adjacent printing elements, on the basis of image data, and
- a driving selection circuit which selects one of said printing elements in each group
- at least one of said element selection circuit and said driving selection circuit being arranged adjacent to said driving circuit of each group,
- wherein orifices which discharge ink are formed in correspondence with said printing elements, respectively.
A printhead cartridge comprising:
- a printhead including an element board, said element board including
- a plurality of printing elements which align in a predetermined direction,
- driving circuits which drive said printing elements,
- an element selection circuit which selects printing elements within each group, each group having a predetermined number of adjacent printing elements, on the basis of image data, and
- a driving selection circuit which selects one of said printing elements in each group,
- at least one of said element selection circuit and said driving selection circuit being arranged adjacent to said driving circuit of each group, and
- said printhead including orifices which discharge ink and are formed in correspondence with said printing elements, respectively;
- and
- an ink container which holds ink to be supplied to said printhead.
A printing apparatus comprising:
- a printhead including an element board, said element board including
- a plurality of printing elements which align in a predetermined direction,
- driving circuits which drive said printing elements,
- an element selection circuit which selects printing elements within each group for each group having a predetermined number of adjacent printing elements, on the basis of image data, and
- a driving selection circuit which selects one of said printing elements in each group,
- at least one of said element selection circuit and said driving selection circuit being arranged adjacent to said driving circuit of each group, and
- said printhead including orifices which discharge ink and are formed in correspondence with said printing elements, respectively;
- and
- control means for transmitting the image data to said printhead.
An element board for a printhead comprising:
- a plurality of thermal transducers aligned in a longitudinal direction of an elongated ink supply port which supplies ink for generating thermal energy for discharging ink;
- driving circuits which drive said thermal transducers;
- a shift register which selects thermal transducers within each group for each group having a predetermined number of adjacent thermal transducers, on the basis of image data;
- and
- a decoder or a circuit composing a part of a decoder which selects one of said thermal transducers in each group,
- wherein at least one of said shift register and said decoder or said circuit is arranged adjacent to said driving circuit of each group, and
- said thermal transducers and said driving circuits are sequentially arranged, respectively, on both longitudinal sides of the ink supply port of the element board.
Dependencies are inferred from the claim text.