Liquid discharge head and liquid discharge apparatus
AssigneeCanon Kabushiki Kaisha
InventorsYoshiyuki Imanaka, Hiroyuki Ishinaga, Akihiro Yamanaka, Masahiko Kubota, Ryoji Inoue
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Abstract
A liquid discharge head comprises first and second substrates which are to be mutually adjoined to form plural liquid paths respectively communicating with plural discharge apertures. The first substrate is provided with energy conversion elements, for converting electrical energy into energy for discharging liquid in the liquid paths, respectively corresponding to the liquid paths. The second substrate is provided with detection elements, for detecting a state of the liquid in said liquid paths, respectively corresponding to the liquid paths, and amplification means for respectively amplifying outputs of said detection elements.
Claims23
A liquid discharge head, comprising first and second substrates which are to be mutually adjoined to form plural liquid paths respectively communicating with plural discharge apertures,
- wherein said first substrate is provided with energy conversion elements, for converting electrical energy into energy for discharging liquid in the liquid paths, respectively corresponding to the liquid paths;
- and
- said second substrate is provided with detection elements, for detecting a state of the liquid in said liquid paths, respectively corresponding to the liquid paths, and amplification means for respectively amplifying outputs of said detection elements,
- wherein said second substrate further includes selector switch means for executing drive and detection of said detection elements in a serial manner.
A liquid discharge head, comprising first and second substrates which are to be mutually adjoined to form plural liquid paths respectively communicating with plural discharge apertures,
- wherein said first substrate is provided with energy conversion elements, for converting electrical energy into energy for discharging liquid in the liquid paths, respectively corresponding to the liquid paths,
- wherein said second substrate is provided with detection elements, for detecting a state of the liquid in said liquid paths, respectively corresponding to the liquid paths, and amplification means for respectively amplifying outputs of said detection elements,
- wherein either of said first and second substrates is provided with plural protruding electrical connecting portions for electrically connecting said detection elements with wirings provided on said first substrate, and the other of said first and second substrates is provided with plural recessed electrical connecting portions to respectively engage with said plural protruding electrical connecting portions and to be respectively connected electrically with said plural protruding electrical connecting portions when said first and second substrates are adjoined, and
- wherein a lateral wall portion of said recessed electrical connecting portion is composed of a part of a liquid path forming member constituting said liquid path, and said recessed electrical connecting portion is formed by eliminating a predetermined portion of said liquid path forming member, when a portion corresponding to said liquid path is eliminated from said liquid path forming member in order to form said liquid path.
Dependencies are inferred from the claim text.