Electronic apparatus comprising fingerprint sensing devices
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United States of America Patent
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-
Dec 4, 2001
Grant Date -
N/A
app pub date -
Dec 3, 1998
filing date -
Dec 4, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An electronic apparatus comprising a fingerprint sensing device (10) having an array of sensing elements (12) carried on a transparent substrate (35) for sensing capacitively the ridge pattern of a fingerprint placed over the array, in which the transparency of the device is utilised to provide additional capabilities. Thus, an optical sensing device (60) may be disposed beneath the device (10) to sense optically through the device a further biometric characteristic, or the presence, of the finger overlying the sensing element array. Substantial transparency can be afforded to the device by forming the sense electrodes (30) of the array from transparent conductive material. In products like mobile telephones, notebook computers, PDAs, smart cards or like portable electronic products of small size such as fingerprint sensing device can then advantageously be arranged overlying a display device with the display output being visible through the device.
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