Recording-element substrate and liquid ejection apparatus
US9216575B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Apr 10, 2015 |
| Grant date | Dec 22, 2015 |
| Priority date | — |
| Expiry date | Apr 10, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/18
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A recording-element substrate includes an ejection port configured to eject liquid; a heating resistance element configured to generate thermal energy for ejecting the liquid from the ejection port; and a drive circuit configured to drive the heating resistance element. The heating resistance element includes a heating resistor layer and three pairs of electrodes provided for the heating resistor layer. The drive circuit forms a heating area that generates thermal energy in the heating resistor layer by selectively using two or more of the electrodes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.