Fingerprint verifying apparatus of small size and method of operating the same
First Claim
1. A fingerprint verifying apparatus comprising:
- a first light emitting device which emits first light of a first color;
a second light emitting device which emits second light of a second color;
an imaging unit which detects an image of a fingerprint of a finger from said first light reflected by a finger;
a fingerprint verifying circuit which has registered fingerprint images, and compares said detected fingerprint image and each of said registered fingerprint images to determine whether said detected fingerprint image is coincident with any of said registered fingerprint images, and outputs a match signal when said detected fingerprint image is coincident with any of said registered fingerprint images; and
a drive switch which turns on said second light emitting device in response to said match signal.
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Accused Products
Abstract
A fingerprint verifying apparatus includes first and second light emitting devices, an imaging unit, a fingerprint verifying circuit and a drive switch. The first light emitting device emits first light of a first color, and the second light emitting device emits second light of a second color. The imaging unit detects an image of a fingerprint of a finger from the first light reflected by a finger. The fingerprint verifying circuit has registered fingerprint images, and compares the detected fingerprint image and each of the registered fingerprint images to determine whether the detected fingerprint image is coincident with any of the registered fingerprint images, and outputs a match signal when the detected fingerprint image is coincident with any of the registered fingerprint images. The drive switch turns on the second light emitting device in response to the match signal.
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Citations
19 Claims
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1. A fingerprint verifying apparatus comprising:
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a first light emitting device which emits first light of a first color;
a second light emitting device which emits second light of a second color;
an imaging unit which detects an image of a fingerprint of a finger from said first light reflected by a finger;
a fingerprint verifying circuit which has registered fingerprint images, and compares said detected fingerprint image and each of said registered fingerprint images to determine whether said detected fingerprint image is coincident with any of said registered fingerprint images, and outputs a match signal when said detected fingerprint image is coincident with any of said registered fingerprint images; and
a drive switch which turns on said second light emitting device in response to said match signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19)
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12. A method of verifying a fingerprint of a finger, comprising the steps of:
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(a) turning on a first light emitting device such that first light of a first color is emitted to irradiate said finger;
(b) detecting an image of said fingerprint of said finger;
(c) comparing said detected fingerprint image and each of registered fingerprint images to determine whether said detected fingerprint image is coincident with any of said registered fingerprint images;
(d) generating a match signal when said detected fingerprint image is coincident with any of said registered fingerprint images; and
(e) in response to said match signal, turning off said first light emitting device and turning on said second light emitting device such that second light of a second color is emitted.
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Specification