Terminal and control method thereof

Patent metadata

Field	Value
Publication number	US-11475114-B2
Application number	US-201816613205-A
Country	US
Kind code	B2
Filing date	Jun 4, 2018
Priority date	Jun 12, 2017
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A terminal for checking a security request level of a fingerprint verification request is provided. The terminal includes a fingerprint recognition sensor configured to acquire a fingerprint image; and a controller configured to check a security request level of a fingerprint verification request when the fingerprint verification request is received, to determine an verification level depending on the security request level, and to perform fingerprint verification in a manner corresponding to the verification level by using the fingerprint image. The controller controls the fingerprint recognition sensor to acquire a fingerprint image of a first level when the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and an elapsed time from the previous verification request is within a threshold time.

First claim

What is claimed is:

1. A terminal comprising:
a fingerprint recognition sensor configured to acquire a fingerprint image; and
a controller configured to check a security request level of a fingerprint verification request when the fingerprint verification request is received, to determine a verification level depending on the security request level, and to perform fingerprint verification in a manner corresponding to the verification level by using the fingerprint image,
wherein
the controller controls the fingerprint recognition sensor to acquire a fingerprint image of a first level when the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and an elapsed time from the previous verification request is within a threshold time, and
the fingerprint image of the first level includes any one of a low resolution fingerprint image, a small area fingerprint image, and a small area low resolution fingerprint image.

2. The terminal of claim 1 , wherein
the fingerprint recognition sensor includes a touch driver configured to include a plurality of Tx channels extending in a first direction and arranged in a second direction crossing the first direction, a plurality of Rx channels extending in the second direction and arranged in the first direction, and a touch driver for receiving a sensing signal from at least one of the Rx channels, and
the touch driver supplies a driving signal to a Tx channel selected among the Tx channels to acquire the fingerprint image of the first level under control of the controller.

3. The terminal of claim 1 , wherein
the fingerprint recognition sensor includes a plurality of touch electrodes arranged in a matrix form, and a touch driver for supplying a driving signal to at least one of the touch electrodes, and receiving a sensing signal from at least one of the touch electrodes, and
the touch driver supplies a driving signal to a touch electrode selected among the touch electrode to acquire the fingerprint image of the first level under control of the controller.

4. The terminal of claim 1 , further comprising:
a display unit;
a touch sensor configured to detect a touch input; and
a pressure sensor configured to sense a touch pressure,
wherein the controller determines that the fingerprint verification request is received by using the touch input and the touch pressure.

5. The terminal of claim 1 , further comprising:
a display unit; and
a touch sensor configured to detect a touch input,
wherein the controller determines that a touch pressure with intensity that exceeds a threshold value is applied when an area of the touch input exceeds a predetermined area, and
determines that the fingerprint verification request is received by using the touch input and the touch pressure.

6. The terminal of claim 5 , wherein
the controller detects an object displayed on an area of the display unit corresponding to the touch input when the touch input is detected, and
determines that the fingerprint verification request is received when the intensity of the touch pressure exceeds the threshold value in the case where a process corresponding to the object requests fingerprint verification.

7. The terminal of claim 5 , wherein
the controller performs at least one of operations of: acquiring a low-resolution fingerprint image, acquiring characteristic information of some types among types of characteristic information that are obtainable from the fingerprint image; and determining that the fingerprint is verified when a first accuracy is satisfied when the touch input is detected, the intensity of the touch pressure exceeds a threshold value, and an elapsed time from a previous unlock is within a threshold time in the case where the terminal is locked.

8. A terminal comprising:
a fingerprint recognition sensor configured to acquire a fingerprint image; and
a controller configured to check a security request level of a fingerprint verification request when the fingerprint verification request is received, to determine a verification level depending on the security request level, and to perform fingerprint verification in a manner corresponding to the verification level by using the fingerprint image,
wherein
the controller acquires some types of feature information from types of feature information that are obtainable from the fingerprint image when the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and an elapsed time from the previous verification request is within a threshold time.

9. The terminal of claim 8 , wherein
the obtainable types of characteristic information include a bifurcation point, an end point, a core, a delta, a vector of ridges, and a vector of valleys.

10. A terminal comprising:
a fingerprint recognition sensor configured to acquire a fingerprint image; and
a controller configured to check a security request level of a fingerprint verification request when the fingerprint verification request is received, to determine a verification level depending on the security request level, and to perform fingerprint verification in a manner corresponding to the verification level by using the fingerprint image, wherein
the controller
determines that the fingerprint is verified when a first accuracy is satisfied in the case where the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and an elapsed time from the previous verification request is within a threshold time, or
determines that the fingerprint is verified when a second accuracy that is higher than the first accuracy is satisfied in the case where either the security request level exceeds the security request level of the previous verification request or the elapsed time exceeds the threshold time while the security request level is less than or equal to the security request level of the previous verification request.

11. A control method of a terminal, the control method comprising:
receiving a fingerprint verification request;
checking a security request level of the fingerprint verification request, and determining a verification level depending on the security request level; and
performing fingerprint verification in a manner corresponding to the verification level by using a fingerprint image acquired by a fingerprint recognition sensor;
wherein
the determining of the verification level includes:
determining whether the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request; and
determining whether an elapsed time from the previous verification request is within a threshold time.

12. The control method of claim 11 , wherein
the performing of the fingerprint verification includes controlling the fingerprint recognition sensor to acquire a fingerprint image of a first level when the security request level is less than or equal to the security request level of a previous verification request that has been completed before the fingerprint verification request, and the elapsed time is within the threshold time, and
the fingerprint image of the first level includes any one of a low resolution fingerprint image, a small area fingerprint image, and a small area low resolution fingerprint image.

13. The control method of claim 12 ,

Assignees

• Hideep Inc

Inventors

• Lee Sein
• Cho Youngho
• Kim Seyeob
• Cho Byung Duck

Classifications

• G06V40/13

  Sensors therefor · CPC title

• G06F21/45

  Structures or tools for the administration of authentication · CPC title

• G06F3/0446

  using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes · CPC title

• H04M2250/12

  including a sensor for measuring a physical value, e.g. temperature or motion · CPC title

• H04M2250/22

  including a touch pad, a touch sensor or a touch detector · CPC title