Fingerprint detecting apparatus canceling offset and control method thereof
AssigneesCrucialtec Co., Ltd., Crucialchips Co., Ltd.
InventorsJoo Il Heo, June Shik Kim, Dong Ho Kim, Taek Moo Kim, Seong Ik Jeong
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Abstract
According to an embodiment of the present invention, an apparatus for detecting a fingerprint is provided, which includes a plurality of sensor pads receiving a response signal from a finger applied to a driving signal, a sensing circuit outputting a sensing signal based on the response signal, and a sensing signal adjusting unit sampling the sensing signal outputted from the sensing circuit maintaining the sensing signal, and adjusting an average voltage level of the sensing signal based on a reference voltage
Claims17
An apparatus for detecting a fingerprint, comprising:
- a plurality of sensor pads receiving a response signal from a finger applied to a driving signal;
- a sensing circuit outputting a sensing signal based on the response signal;
- and
- a sensing signal adjusting unit sampling the sensing signal outputted from the sensing circuit, maintaining the sensing signal, and adjusting an average voltage level of the sensing signal based on a reference voltage.
A method of operating an apparatus for detecting a fingerprint including a plurality of sensing pads sensing each response signal from a finger according to an application of a driving signal, comprising:
- detecting an offset from the response signal outputted from each sensor pad;
- and
- outputting a sensing signal reflecting the offset.
Dependencies are inferred from the claim text.