Navigation and fingerprint sensor
First Claim
1. A device comprising:
- a mobile embedded device having a cursor manipulator including, the cursor manipulator including, a sensing surface operative to sense contact by the human finger, the contact corresponding to applied pressure, a pressure sensor array disposed on the sensing surface, wherein a measurement of the plurality of pressure sensors corresponds to an image, and an image detector, receiving images from the pressure sensor array, generating cursor manipulation corresponding to changes between the images.
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0 Petitions
Accused Products
Abstract
A pressure sensitive cursor control suitable for applications that include cellular phones and personal data assistants includes a pressure sensor array suitable to detect a human fingerprint. Cursor control is provided by subtle finger movement. Sequential images of the finger are captured and compared to determine planar movement or data entry. Performance may be improved by sampling zones within the captured image and comparing the zones with those in an earlier image. Performance could also be improved by subsampling the array. While the full resolution of the pressure-sensing array is needed to capture ones fingerprint and execute an authentication function only a subsampled image from the array is needed to derive meaningful navigation data. The pressure sensor array is designed on a glass substrate in order to drive down the unit cost. The silicon companion chip where the data is interpreted also drives the array and can therefore sub-sample the array when navigating and/or get a full resolution image when authenticating.
43 Citations
15 Claims
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1. A device comprising:
a mobile embedded device having a cursor manipulator including, the cursor manipulator including, a sensing surface operative to sense contact by the human finger, the contact corresponding to applied pressure, a pressure sensor array disposed on the sensing surface, wherein a measurement of the plurality of pressure sensors corresponds to an image, and an image detector, receiving images from the pressure sensor array, generating cursor manipulation corresponding to changes between the images. - View Dependent Claims (2, 3, 4, 5)
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6. A system for providing cursor manipulation when using a human finger comprising:
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sensing surface operative to sense contact by the human finger, the contact corresponding to applied pressure;
a pressure sensor array disposed on the sensing surface, wherein a measurement of the plurality of pressure sensors corresponds to an image; and
an image detector, receiving images from the pressure sensor array, generating cursor manipulation corresponding to changes between the images. - View Dependent Claims (7, 8, 9)
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10. A method for finger navigation comprising:
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sampling a portion of an array of pressure sensors to generate a first sample;
re-sampling the portion of the array to generate a second sample; and
comparing the first and second samples to determine navigational movement. - View Dependent Claims (11, 12, 13, 14, 15)
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Specification