MOBILE TERMINAL AND METHOD FOR CONTROLLING THE SAME

• US 20160171281A1
• Filed: 04/02/2015
• Published: 06/16/2016
• Est. Priority Date: 12/12/2014
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: PARK, Junbum, KIM, Younghwan, PARK, Jungju
• Granted Patent: US 9,547,789 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 1/1643 the display being associated to a digitizer, e.g. laptops that can be used as penpads details related to the relative motion of the display enclosure with respect to the body enclosure, e.g. to move between laptop and tablet PC configuration G06F1/1615
• CPC Class Codes: G06F 21/32 using biometric data, e.g. fingerprints, iris scans or voiceprints
• CPC Class Codes: G06F 2203/0338 Fingerprint track pad, i.e. fingerprint sensor used as pointing device tracking the fingertip image
• CPC Class Codes: G06F 3/03547 Touch pads, in which fingers can move on a surface
• CPC Class Codes: G06F 3/041 Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
• CPC Class Codes: G06F 3/0416 Control or interface arrangements specially adapted for digitisers
• CPC Class Codes: G06F 3/044 by capacitive means
• CPC Class Codes: G06F 3/048 Interaction techniques based on graphical user interfaces [GUI]
• CPC Class Codes: G06F 3/0488 using a touch-screen or digitiser, e.g. input of commands through traced gestures
• CPC Class Codes: G06V 40/1306 non-optical, e.g. ultrasonic or capacitive sensing
• CPC Class Codes: G06V 40/1347 Preprocessing; Feature extraction
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: H04M 1/026 Details of the structure or mounting of specific components
• CPC Class Codes: H04M 1/0266 for a display module assembly
• CPC Class Codes: H04M 1/72403 with means for local support of applications that increase the functionality
• CPC Class Codes: H04M 2250/12 including a sensor for measuring a physical value, e.g. temperature or motion
• CPC Class Codes: H04M 2250/22 including a touch pad, a touch sensor or a touch detector

Abstract

A mobile terminal including a wireless communication unit configured to provide wireless communication; a display unit including a touch sensor and a fingerprint recognition sensor overlapped with the touch sensor; and a controller configured to deactivate the fingerprint recognition sensor, receive a finger touch input on the display unit, extract, from the touch sensor, touch information related to a touch region where the finger touch input has been applied on the display unit, activate the fingerprint recognition sensor when the extracted touch information indicates a sufficient finger touch input has been received, sense fingerprint information of the finger using the activated fingerprint recognition sensor, and perform fingerprint authentication with respect to the sensed fingerprint information based on the extracted touch information.

Claims

1. A mobile terminal, comprising:

a wireless communication unit configured to provide wireless communication;

a display unit including a touch sensor and a fingerprint recognition sensor overlapped with the touch sensor; and

a controller configured to;

deactivate the fingerprint recognition sensor,

receive a finger touch input on the display unit,

extract, from the touch sensor, touch information related to a touch region where the finger touch input has been applied on the display unit,

activate the fingerprint recognition sensor when the extracted touch information indicates a sufficient finger touch input has been received,

sense fingerprint information of the finger using the activated fingerprint recognition sensor, and

perform fingerprint authentication with respect to the sensed fingerprint information based on the extracted touch information.

2. The mobile terminal of claim 1, wherein the touch information includes at least one of coordinate information of the touch region where the finger touch input has been applied to the display unit, and angle information indicating a tilted degree of a longest axis of the touch region based on a preset axis.

3. The mobile terminal of claim 2, wherein the controller is further configured to determine a position on the display unit where the fingerprint information has been sensed, using the coordinates information of the touch region, when performing the fingerprint authentication.

4. The mobile terminal of claim 2, wherein the controller is further configured to:

perform the fingerprint authentication based on whether or not the sensed fingerprint information is consistent with pre-stored fingerprint information, and

determine a tilted degree of the sensed fingerprint information based on the pre-stored fingerprint information, using the angle information extracted from the touch sensor.

5. The mobile terminal of claim 4, wherein when the angle information has a specific size in one direction, the controller is further configured to:

rotate the sensed fingerprint information in another direction opposite to the one direction, by the specific size, and

determine whether the rotated fingerprint information is consistent with the pre-stored fingerprint information.

6. The mobile terminal of claim 1, wherein the controller is further configured to:

extract pressure information of the touch input, using the touch information related to the touch region where the touch input has been applied, and

when the pressure information of the touch input is out of a reference range, output notification information requesting for a new touch input to the touch region, before sensing the fingerprint information.

7. The mobile terminal of claim 1, wherein the controller is further configured to:

deactivate the display unit, and

activate the display unit when the fingerprint information of the finger corresponds to pre-stored fingerprint information.

8. The mobile terminal of claim 7, wherein the finger touch input includes multiple touch inputs applied at least twice within a reference time.

9. The mobile terminal of claim 8, wherein the controller is further configured to perform the fingerprint authentication using fingerprint information of a finger which has applied a last touch input among the multiple touch inputs.

10. The mobile terminal of claim 9, wherein when a first touch input is applied to the display unit, the controller is further configured extract, from the touch sensor, touch information related to a touch region to which the first touch input has been applied,

wherein when a second touch input different from the first touch input is applied to the touch region to which the first touch input has been applied, the controller is further configured to sense fingerprint information of a finger which has applied the second touch input, using the fingerprint recognition sensor, and

wherein when performing fingerprint authentication with respect to fingerprint information of the finger which has applied the second touch input, the controller is further configured to use touch information related to the touch region to which the first touch input has been applied.

11. The mobile terminal of claim 10, wherein when the second touch input is applied to a touch region different from the touch region where the first touch input has been applied, the controller is further configured to extract touch information related to the touch region where the second touch input has been applied, and

wherein for fingerprint authentication, the controller is further configured to use the touch information related to the touch region where the second touch input has been applied, rather than the touch information related to the touch region where the first touch input has been applied.

12. The mobile terminal of claim 10, wherein the controller is further configured to activate the fingerprint recognition sensor when the first touch input is applied.

13. The mobile terminal of claim 1, wherein when a preset type of touch input is applied to the deactivated display unit, the controller is further configured to activate the display unit, and output different screen information based on whether the fingerprint authentication is successful.

14. The mobile terminal of claim 13, wherein the controller is further configured to:

enter the mobile terminal is in a locked state and display a lock screen,

release the locked state based on success of the fingerprint authentication, and output a home screen page to the activated display unit, and

when the fingerprint authentication fails when the mobile terminal is in the locked state, output a screen corresponding to the locked state on the activated display unit.

15. The mobile terminal of claim 14, wherein the controller is further configured to:

display a graphic object for guiding a touch region where of the finger touch input has been applied on the lock screen, and

if a new finger touch input is applied to the graphic object, sense new fingerprint information of a finger which has applied the new touch input, and use touch information related to the touch region where the finger touch input has been applied, when performing fingerprint authentication with respect to the sensed new fingerprint information.

16. A method of controlling a mobile terminal, the method comprising:

deactivating, via a controller of the mobile terminal, a fingerprint recognition sensor overlapped with a touch sensor included in a display unit of the mobile terminal;

receiving a finger touch input on the display unit;

extracting, from the touch sensor, touch information related to a touch region where the finger touch input has been applied on the display unit;

activating the fingerprint recognition sensor when the extracted touch information indicates a sufficient finger touch input has been received;

sensing fingerprint information of the finger using the activated fingerprint recognition sensor; and

performing fingerprint authentication with respect to the sensed fingerprint information based on the extracted touch information.

17. The method of claim 16, wherein the touch information includes at least one of coordinate information of the touch region where the finger touch input has been applied to the display unit, and angle information indicating a tilted degree of a longest axis of the touch region based on a preset axis.

18. The method of claim 17, further comprising:

determining a position on the display unit where the fingerprint information has been sensed, using the coordinates information of the touch region, when performing the fingerprint authentication.

19. The method of claim 17, further comprising:

performing the fingerprint authentication based on whether or not the sensed fingerprint information is consistent with pre-stored fingerprint information; and

determining a tilted degree of the sensed fingerprint information based on the pre-stored fingerprint information, using the angle information extracted from the touch sensor.

20. The method of claim 19, wherein when the angle information has a specific size in one direction, the method further comprises:

rotating the sensed fingerprint information in another direction opposite to the one direction, by the specific size; and

determining whether the rotated fingerprint information is consistent with the pre-stored fingerprint information.