Apparatus for recognizing biometric information and method for activating a plurality of piezoelectric element individually
First Claim
1. A method for selectively activating, by a biological information recognition apparatus, piezoelectric elements, the method comprising steps of:
- (a) setting only one specific piezoelectric element among a plurality of piezoelectric elements as a first signal generation element;
(b) setting one or more of the piezoelectric elements approximate to the first signal generation element other than the first signal generation element as a first signal reception element;
(c) generating a first ultrasonic signal by activating the first signal generation element;
(d) receiving a first reflected wave signal by activating the first signal reception element, wherein the first reflected wave signal is generated by a reflection of the first ultrasonic signal from a biological tissue, which is generated by the first signal generation element;
(e) setting only one specific piezoelectric element among a plurality of piezoelectric elements approximate to the first signal generation element other than the first signal generation element as a second signal generation element;
(f) setting one or more piezoelectric elements approximate to the second signal generation element other than the second signal generation element as a second signal reception element;
(g) generating a second ultrasonic signal by activating the second signal generation element; and
(h) receiving a second reflected wave signal by activating the second signal reception element, wherein the second reflected wave signal is generated by a reflection of the second ultrasonic signal from the biological tissue, which is generated by the second signal generation element,wherein the plurality of piezoelectric elements is arranged to form a plurality of rows, and piezoelectric elements forming a specific row are cornerwise arranged with respect to piezoelectric elements forming a previous order row of the specific row or piezoelectric elements forming a next order row of the specific row,wherein the biological information recognition apparatus compares a size of the first reflected wave signal received in the step (d) with a size of the second reflected wave signal received in the step (h) and controls a size of a third ultrasonic signal generated by a third signal generation element newly set in a next round based on a result of the comparison of the first reflected wave signal and the second reflected wave signal.
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Abstract
The present invention relates to a biological information recognition apparatus and a method for selectively activating, by the biological information recognition apparatus, a plurality of piezoelectric elements. More particularly, the present invention relates to a biological information recognition apparatus which may be used to identify a user by recognizing biological information, such as the fingerprint, blood vessels, and bones of a finger of the user, and a method of driving the same. More specifically, the present invention relates to a methodology for individually activating a plurality of piezoelectric elements included in the biological information recognition apparatus and scanning biological information using a method different from a conventional method by selectively activating the plurality of piezoelectric elements. Furthermore, the present invention is directed to forming the piezoelectric elements on a substrate in a pattern of a form which is different from a conventional pattern of a matrix form and more efficiently identifying biological information.
40 Citations
8 Claims
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1. A method for selectively activating, by a biological information recognition apparatus, piezoelectric elements, the method comprising steps of:
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(a) setting only one specific piezoelectric element among a plurality of piezoelectric elements as a first signal generation element; (b) setting one or more of the piezoelectric elements approximate to the first signal generation element other than the first signal generation element as a first signal reception element; (c) generating a first ultrasonic signal by activating the first signal generation element; (d) receiving a first reflected wave signal by activating the first signal reception element, wherein the first reflected wave signal is generated by a reflection of the first ultrasonic signal from a biological tissue, which is generated by the first signal generation element; (e) setting only one specific piezoelectric element among a plurality of piezoelectric elements approximate to the first signal generation element other than the first signal generation element as a second signal generation element; (f) setting one or more piezoelectric elements approximate to the second signal generation element other than the second signal generation element as a second signal reception element; (g) generating a second ultrasonic signal by activating the second signal generation element; and (h) receiving a second reflected wave signal by activating the second signal reception element, wherein the second reflected wave signal is generated by a reflection of the second ultrasonic signal from the biological tissue, which is generated by the second signal generation element, wherein the plurality of piezoelectric elements is arranged to form a plurality of rows, and piezoelectric elements forming a specific row are cornerwise arranged with respect to piezoelectric elements forming a previous order row of the specific row or piezoelectric elements forming a next order row of the specific row, wherein the biological information recognition apparatus compares a size of the first reflected wave signal received in the step (d) with a size of the second reflected wave signal received in the step (h) and controls a size of a third ultrasonic signal generated by a third signal generation element newly set in a next round based on a result of the comparison of the first reflected wave signal and the second reflected wave signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A biological information recognition apparatus, comprising:
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a substrate; a plurality of piezoelectric elements arranged on the substrate to form a plurality of rows; a controller configured to selectively activate the plurality of piezoelectric elements, wherein piezoelectric elements forming a specific row are cornerwise arranged with respect to piezoelectric elements forming a previous order row of the specific row or piezoelectric elements forming a next order row of the specific row, the controller activates piezoelectric elements as following steps; (a) setting only one specific piezoelectric element among a plurality of piezoelectric elements as a first signal generation element; (b) setting one or more of the piezoelectric elements approximate to the first signal generation element other than the first signal generation element as a first signal reception element; (c) generating a first ultrasonic signal by activating the first signal generation element; (d) receiving a first reflected wave signal by activating the first signal reception element, wherein the first reflected wave signal is generated by a reflection of the first ultrasonic signal from a biological tissue, which is generated by the first signal generation element; (e) setting only one of a plurality of piezoelectric elements approximate to the first signal generation element as a second signal generation element after the step (d); (f) setting one or more piezoelectric elements approximate to the second signal generation element as a second signal reception element; (g) generating a second ultrasonic signal by activating the second signal generation element; and (h) receiving a second reflected wave signal by activating the second signal reception element, wherein the second reflected wave signal is generated by a reflection of the second ultrasonic signal from the biological tissue, which is generated by the second signal generation element, the plurality of piezoelectric elements is arranged to form a plurality of rows, and piezoelectric elements forming a specific row are cornerwise arranged with respect to piezoelectric elements forming a previous order row of the specific row or piezoelectric elements forming a next order row of the specific row, wherein the biological information recognition apparatus compares a size of the first reflected wave signal received in the step (d) with a size of the second reflected wave signal received in the step (h) and controls a size of a third ultrasonic signal generated by a third signal generation element newly set in a next round based on a result of the comparison of the first reflected wave signal and the second reflected wave signal.
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Specification