公开(公告)号：EP0887186B1

公开(公告)日：2001-11-07

申请号：EP97830321.2

申请日：1997-06-27

Applicant: STMicroelectronics S.r.l.

Inventor： Vigna, Benedetto ,  Maggi, Riccardo

IPC: B41J2/125 ,  B41J2/14 ,  B41J2/16

CPC classification number: B41J2/1603 ,  B41J2/125 ,  B41J2/14129 ,  B41J2/14153 ,  B41J2/164 ,  B41J2002/14354 ,  B41J2202/13

公开(公告)号：EP1079519B1

公开(公告)日：2008-07-09

申请号：EP00202920.5

申请日：2000-08-21

Applicant: STMicroelectronics S.r.l. ,  Hewlett-Packard Company (a Delaware Corporation)

Inventor： Maggi, Riccardo ,  Ghozeil, Adam

IPC: H03F3/345 ,  G05F3/26

CPC classification number: H03F3/345 ,  G05F3/267

公开(公告)号：EP0887186A1

公开(公告)日：1998-12-30

申请号：EP97830321.2

申请日：1997-06-27

Applicant: STMicroelectronics S.r.l.

Inventor： Vigna, Benedetto ,  Maggi, Riccardo

IPC: B41J2/125 ,  B41J2/14 ,  B41J2/16

CPC classification number: B41J2/1603 ,  B41J2/125 ,  B41J2/14129 ,  B41J2/14153 ,  B41J2/164 ,  B41J2002/14354 ,  B41J2202/13

Abstract: The inkjet print head comprises an ink drop emission mini-gun (30) and a drop emission sensor (4) integrated in a chip of semiconductor material. The mini-gun is formed by an ink chamber (21) and a nozzle (23) in communication with the ink chamber and the drop emission sensor includes a resistive element (4) arranged in a position adjacent to the ink chamber (21). The resistance of the resistive element (4) depends on the pressure exerted thereon, so that when the mini-gun emits an ink drop, it is subjected to a recoil movement which causes a change of pressure and hence of resistance in the resistive element; this change in resistance may be detected through a suitable circuitry (29) to identify whether and when a drop of ink has been emitted.

Abstract translation: 喷墨打印头包括集成在半导体材料芯片中的墨滴发射微型枪（30）和液滴发射传感器（4）。 微型枪由与墨水室连通的墨水室（21）和喷嘴（23）形成，并且液滴发射传感器包括布置在与墨水室（21）相邻的位置的电阻元件（4）。 电阻元件（4）的电阻取决于施加在其上的压力，使得当微型枪发射墨滴时，其受到反冲运动，其导致电阻元件中的压力变化，从而导致电阻的变化; 可以通过合适的电路（29）来检测电阻的这种变化，以识别是否以及何时已经发射一滴墨水。