公开(公告)号：US09033452B2

公开(公告)日：2015-05-19

申请号：US14193511

申请日：2014-02-28

Applicant: CANON FINETECH INC.

Inventor： Shingo Takada

IPC: B41J29/393 ,  B41J29/00 ,  B41J2/165 ,  B41J2/125 ,  B41J2/21

CPC classification number: B41J29/00 ,  B41J2/125 ,  B41J2/16579 ,  B41J2/2142

Abstract: The objective of the present invention is to provide an ejection detection device with an inexpensive and simple structure that can appropriately detect conditions of nozzles, without the control of the quantity of liquid ejected from the nozzles being required. Therefore, for the ejection detection device of the present invention, a light-emitting unit emits light to a light-receiving unit in a direction in which a plurality of nozzles is arranged in a print head. The ejection detection device detects the condition of a nozzle to be detected, which ejects the liquid droplet. At this time, the emission intensity of the light-emitting unit or the responsivity of the light-receiving unit is controlled by the print head in accordance with the location of the nozzle to be detected.

Abstract translation: 本发明的目的是提供一种具有便宜且简单的结构的喷射检测装置，其可以适当地检测喷嘴的状况，而不需要控制从喷嘴喷射的液体的量。 因此，对于本发明的喷射检测装置，发光单元沿着打印头中布置多个喷嘴的方向向光接收单元发光。 喷射检测装置检测喷射液滴的待检测喷嘴的状态。 此时，根据要检测的喷嘴的位置，由打印头控制发光单元的发光强度或光接收单元的响应度。