Liquid ejecting head and liquid ejecting apparatus
US11845278B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 31, 2022 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Mar 10, 2042 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/12
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A liquid ejecting head includes piezoelectric elements for ejecting liquid from nozzles, pressure chambers in communication with the nozzles, individual supply flow passages for supplying the liquid to the nozzles, individual collection flow passages for collecting the liquid not ejected from the nozzles, a diaphragm that defines a wall surface of the pressure chambers and deforms by driving the piezoelectric element, a flexible substrate having a drive circuit electrically coupled to the piezoelectric elements, and a heat release member that is either in contact with an surface of the flexible substrate that faces away from the drive circuit, or in contact with the drive circuit, and conducts heat of the drive circuit to the diaphragm. The heat release member is disposed closer to the individual supply flow passage than to the individual collection flow passage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.