发明名称 |
Capacitive fingerprint acquisition sensor |
摘要 |
An apparatus for detecting topographic variations on an object such as a finger includes an array of sensing elements disposed on a substrate which each have a parasitic capacitance. An insulating receiving surface is disposed over the array of sensing elements and is adapted to receive the object such that a sensing element and a portion of the object located thereabove creates a measurable change in capacitance with respect to the parasitic capacitance. An electronic circuit is coupled to the array of sensing elements for measuring the measurable change in capacitance.
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申请公布号 |
US6016355(A) |
申请公布日期 |
2000.01.18 |
申请号 |
US19950573100 |
申请日期 |
1995.12.15 |
申请人 |
VERIDICOM, INC. |
发明人 |
DICKINSON, ALEXANDER GEORGE;MCPHERSON, ROSS;MENDIS, SUNETRA;ROSS, PAUL C.;TYSON, JOHN A. |
分类号 |
G01B7/00;G01B7/004;G01B7/28;G01B7/34;G01R27/26;G06F3/033;G06F3/041;G06F3/044;G06K9/00;G07C9/00;(IPC1-7):G06K9/28;G01R29/24 |
主分类号 |
G01B7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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