# US 9,883,397 B2 · Mobile device, and method for releasing lock of the mobile device via handwriting recognition

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- Number: US 9,883,397 B2
- Document ID: US9883397B2
- Status: Granted
- Kind: B2
- Application number: 15/388,878
- Filed: 2016-12-22
- Published: 2017-04-13
- Granted: 2018-01-30
- Earliest claimed: 2012-08-01
- Assignees: Samsung Electronics Co., Ltd.
- Applicants: Samsung Electronics Co., Ltd.
- Inventors: Sangho Kim; Musik Kwon; Moorim Kim; Seongtaek Hwang
- Web page: https://patentgrep.com/patent/US9883397B2

## CPC

- H04W 12/06: Authentication
- G06F 3/04883: for inputting data by handwriting, e.g. gesture or text
- G06F 21/32: using biometric data, e.g. fingerprints, iris scans or voiceprints
- G06F 21/36: by graphic or iconic representation
- H04M 1/724631: {by limiting the access to the user interface, e.g. locking a touch-screen or a keypad}
- H04W 12/08: Access security
- H04W 12/68: Gesture-dependent or behaviour-dependent
- H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72)
- G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)

## Abstract

A method, and a mobile device adapted thereto, verifies a user and executes applications via handwriting recognition. The method of controlling a mobile device includes entering a lock state, detecting a user's input, verifying a user based on the input and searching for an instruction corresponding to the input, and performing at least one of maintaining or releasing the lock state and which performs an operation corresponding to the instruction, based on user verification result and the instruction search result.

## Claims

### Claim 1

A method of controlling an electronic device comprising:
displaying a lock screen user interface on a touch sensitive display of the electronic device, wherein the touch sensitive display is capable of detecting contact with a user body or a stylus pen;
detecting a user input through the touch sensitive display while displaying the lock screen user interface;
determining whether the detected user input is made with a stylus pen;
displaying, if the detected user input is made with the stylus pen, a drawing on the lock screen user interface, wherein the drawing comprises one or more marks corresponding to the user input made with the stylus pen;
determining whether the user input made with the stylus pen is a predefined input; and
replacing, if the user input made with the stylus pen is the predefined input, the lock screen user interface with an execution screen of an application, wherein the application corresponds to the user input made with the stylus pen.

### Claim 2 (depends on 1)

The method of claim 1, wherein replacing, if the user input made with the stylus pen is the predefined input, the lock screen user interface with an execution screen of an application comprises:
bypassing an unlock user interface, in response to a determination that the user input made with the stylus pen is the predefined input; and
displaying the execution screen of the application.

### Claim 3 (depends on 2)

The method of claim 2, wherein determining whether the detected user input is made with the stylus pen comprises:
ascertaining an area of the user input;
comparing the area of the user input with a predefined area; and
determining, if the area of the user input is less than or equal to the predefined area, the detected user input is made with the stylus pen.

### Claim 4 (depends on 2)

The method of claim 2, wherein determining whether the detected user input is made with the stylus pen comprises:
concluding, if the area of the user input is larger than the predefined area, the detected user input is made with a user's finger.

### Claim 5 (depends on 1)

The method of claim 1, wherein determining whether the user input made with the stylus pen is the predefined input comprises:
verifying a user based on the detected user input through the touch sensitive display, and
concluding that the verification of the user is successful based on a result of the verification of the user result.

### Claim 6 (depends on 5)

The method of claim 5, wherein verifying the user based on the detected user input through the touch sensitive display comprises:
extracting an input feature of the detected user input through the touch sensitive display,
comparing the input feature with predefined verification information,
determining whether a verification of user is successful based on a result of the comparison result.

### Claim 7 (depends on 6)

The method of claim 6, wherein determining whether a verification of user is successful based on a result of the comparison result comprises:
calculating a similarity between the input feature with predefined verification information; and
concluding that the verification of user is successful when the similarity is greater than or equal to a threshold value or that the user verification is unsuccessful when the similarity is less than the threshold value.

### Claim 8 (depends on 6)

The method of claim 6, wherein determining whether the user input made with the stylus pen is the predefined input further comprises:
searching for an instruction corresponding to the user input through the touch sensitive display, and
ascertaining whether information related to the execution for the application exists.

### Claim 9 (depends on 8)

The method of claim 8, wherein determining whether the user input made with the stylus pen is the predefined input further comprises:
if the verification of user is successful and ascertaining whether the information related to the execution for the application exists, concluding that the user input made with the stylus pen is a predefined input.

### Claim 10 (depends on 9)

The method of claim 9, wherein further comprising:
if the verification of user is successful and ascertaining whether the information related to the execution for the application does not exist, releasing the lock screen user interface; and
displaying an idle screen or a screen of a previously executed application.

### Claim 11

A mobile apparatus comprising:
a display;
at least one processor; and
a memory configured to store instructions to cause the processor to:
display a lock screen user interface on a touch sensitive display of the electronic device, wherein the touch sensitive display is capable of detecting a contact with a user body or a stylus pen;
detect a user input through the touch sensitive display while displaying the lock screen user interface;
determine whether the detected user input is made with a stylus pen;
display, if the detected user input is made with the stylus pen, a drawing on the lock screen user interface, wherein the drawing comprises one or more marks corresponding to the user input made with the stylus pen;
determine whether the user input made with the stylus pen is a predefined input; and
replace, if the user input made with the stylus pen is the predefined input, the lock screen user interface with an execution screen of an application, wherein the application corresponds to the user input made with the stylus pen.

### Claim 12 (depends on 11)

The apparatus of claim 11, wherein the processor is further configured to:
bypass an unlock user interface, in response to a determination that the user input made with the stylus pen is the predefined input; and
display the execution screen of the application.

### Claim 13 (depends on 11)

The apparatus of claim 11, wherein the processor is further configured to:
ascertain an area of the user input;
compare the area of the user input with a predefined area; and
determine, if the area of the user input is less than or equal to the predefined area, the detected user input is made with the stylus pen.

### Claim 14 (depends on 13)

The apparatus of claim 13, wherein the processor is further configured to:
conclude, if the area of the user input is larger than the predefined area, the detected user input is made with a user's finger.

### Claim 15 (depends on 11)

The apparatus of claim 11, wherein the processor is further configured to:
verify a user based on the detected user input through the touch sensitive display, and
conclude that the verification of user is successful based on a result of the verification of the user result.

### Claim 16 (depends on 15)

The apparatus of claim 15, wherein the processor is further configured to:
extract an input feature of the detected user input through the touch sensitive display,
compare the input feature with predefined verification information,
determine whether a verification of user is successful based on a result of the comparison result.

### Claim 17 (depends on 15)

The apparatus of claim 15, wherein the processor is further configured to:
calculate a similarity between the input feature with predefined verification information; and
conclude that the verification of user is successful when the similarity is greater than or equal to a threshold value or that the user verification is unsuccessful when the similarity is less than the threshold value.

### Claim 18 (depends on 16)

The apparatus of claim 16, wherein the processor is further configured to:
search for an instruction corresponding to the user input through the touch sensitive display, and
ascertain whether information related to the execution for the application exists.

### Claim 19 (depends on 18)

The apparatus of claim 18, wherein the processor is further configured to:
if the verification of user is successful and ascertaining whether the information related to the execution for the application exists, conclude that the user input made with the stylus pen is the predefined input.

### Claim 20 (depends on 18)

The apparatus of claim 18, wherein the processor is further configured to: if the verification of the user is successful and ascertaining whether the information related to the execution for the application does not exist, release the lock screen user interface; and display an idle screen or a screen of a previously executed application.