Method for forming a bipolar integrated ink jet printhead driver
US5681764A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1996 |
| Grant date | Oct 28, 1997 |
| Priority date | — |
| Expiry date | Oct 10, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB41J2202/13
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A bipolar ink jet driver circuit includes a plurality of individual driver cells having a common collector and a resistive heater element. A common collector obviates the need for any isolation between adjacent driver cells. The driver cells each include two bipolar transistors configured as a Darlington pair, which drive an associated resistive heater element. The cells are grouped together to form individual driver circuits each having a control line for enabling each driver circuit. The cells within each driver circuit are individually addressable via address lines which are coupled to each of the driver elements. The resistive heater elements are actuated by enabling a driver circuit and addressing a driver cell within the enabled driver circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.