| 发明名称 | Capacitive fingerprint sensor | ||
| 摘要 | The capacitive fingerprint sensor according to the exemplary embodiments of the present invention includes: a fingerprint sensing electrode Cfp for sensing a human fingerprint; a first transistor T1 in which the amount of currents flowing therethrough changes depending on an output voltage of the fingerprint sensing electrode Cfp; a second transistor T2 in which the amount of currents flowing therethrough changes due to a difference between the currents flowing through the first transistor T1; and a third transistor T3 which resets a gate electrode of the first transistor T1 and provides capacitive coupling with the gate electrode of the first transistor T1 via a pulse signal. | ||
| 申请公布号 | US8766651(B2) | 申请公布日期 | 2014.07.01 |
| 申请号 | US201213556551 | 申请日期 | 2012.07.24 |
| 申请人 | Silicon Display Technology | 发明人 | Kang Moon Hyo;Hur Ji Ho |
| 分类号 | G01R27/26 | 主分类号 | G01R27/26 |
| 代理机构 | Stevens & Showalter, LLP | 代理人 | Stevens & Showalter, LLP |
| 主权项 | 1. A capacitive fingerprint sensor comprising: a fingerprint sensing electrode Cfp for sensing a human fingerprint; a first transistor T1 electrically coupled with the fingerprint sensing electrode Cfp such that a first amount of current flowing through the first transistor varies based on an output voltage of the fingerprint sensing electrode; a second transistor T2 electrically coupled with the first transistor T1 such that a second amount of current flowing through the second transistor T2 varies based on the first amount of current flowing through the first transistor T1; and a third transistor T3 electrically coupled with the first transistor T1 which resets a gate electrode of the first transistor T1 and provides capacitive coupling with the gate electrode of the first transistor T1 via a pulse signal. | ||
| 地址 | KR | ||