| 发明名称 |
INKJET PRINTING APPARATUS AND DETECTION METHOD |
| 摘要 |
An inkjet printing apparatus includes a current source configured to be able to supply, to a resistance sensor, a constant current of the first constant current value and a constant current of the second constant current value larger than the first constant current value. A change of the resistance value of the resistance sensor is detected by switching the value of the constant current to be supplied to the resistance sensor between the first constant current value and the second constant current value a predetermined time after driving a heater to discharge an ink droplet. |
| 申请公布号 |
US2014292891(A1) |
申请公布日期 |
2014.10.02 |
| 申请号 |
US201414224496 |
申请日期 |
2014.03.25 |
| 申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
Ike Takeshi |
| 分类号 |
B41J29/38;G01K7/16 |
主分类号 |
B41J29/38 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. An inkjet printing apparatus comprising:
a printhead including a heater configured to discharge an ink droplet from a nozzle, and a resistance sensor whose resistance value changes upon a temperature change of the heater; a current source configured to be able to supply, to the resistance sensor, a constant current of a first constant current value and a constant current of a second constant current value larger than the first constant current value; and a detection unit configured to detect a change of the resistance value of the resistance sensor by switching a value of the constant current to be supplied to the resistance sensor between the first constant current value and the second constant current value a predetermined time after driving the heater to discharge the ink droplet. |
| 地址 |
Tokyo JP |
