Ultrasonic fingerprint sensor and ultrasonic fingerprint sensing method using the same
AssigneeSamsung Display Co., Ltd.
InventorsKyoung Hun BEEN, Jin Woo KIM, Byeong Kyu JEON, Soon Gyu LEE
Life of this patent
Estimating the term…
Abstract
An ultrasonic fingerprint sensing method includes: generating a first ultrasonic wave using a first frequency; receiving a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint; generating a first image based on the first signal; comparing the first image with a registered reference image to generate a matching score; and in response to the matching score being less than a threshold value, generating a second image using a second frequency.
Claims23
An ultrasonic fingerprint sensing method comprising:
- generating a first ultrasonic wave using a first frequency;
- receiving a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint;
- generating a first image based on the first signal;
- comparing the first image with a registered reference image to generate a matching score;
- and
- in response to the matching score being less than a threshold value, generating a second image using a second frequency.
An ultrasonic fingerprint sensing method comprising:
- generating a first ultrasonic wave using a first frequency;
- receiving a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint;
- generating a first image based on the first signal;
- comparing the first image and a registered reference image to generate a matching score;
- and
- in response to the matching score being less than a threshold value, measuring a temperature of the fingerprint.
An ultrasonic fingerprint sensor comprising:
- an ultrasonic wave generator configured to generate a first ultrasonic wave using a first frequency;
- a reception unit configured to receive a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint;
- an image generator configured to generate a first image based on the first signal;
- and
- a comparison/determination unit configured to perform comparison/determination on the first image and a registered reference image;
- and
- wherein the image generator is configured to generate a second image using a second frequency in response to a determination by the comparison/determination unit that a matching score as a result of comparison between the first image and the registered reference image is less than a threshold value.
An ultrasonic fingerprint sensor comprising:
- an ultrasonic wave generator configured to generate a first ultrasonic wave using a first frequency;
- a reception unit configured to receive a first signal generated by reflection of the first ultrasonic wave from each of a ridge and a valley of a fingerprint;
- an image generator configured to generate a first image based on the first signal;
- and
- a comparison/determination unit configured to perform comparison/determination on the first image and a registered reference image;
- a temperature measurement/determination unit configured to perform measurement/determination on a temperature of the fingerprint,
- wherein the temperature measurement/determination unit is configured to perform measurement/determination on the temperature of the fingerprint in response to a determination by the comparison/determination unit that a matching score as a result of comparison between the first image and the registered reference image is less than a threshold value.
Dependencies are inferred from the claim text.