Device access control based on detected user state

1. A mobile device, comprising:

a display device to display visual content for viewing in one of a primary user mode or a secondary user mode of operation of the mobile device;

one or more sensors configured to obtain data associated with the secondary user mode; and

an access control module implemented at least partially in hardware, the access control module configured to:

determine that the mobile device is in the secondary user mode;

determine a user state of a user accessing the mobile device in the secondary user mode based at least in part on the data and the determination that the mobile device is in the secondary user mode; and at least one of:

restrict the display of the visual content on the display device based on the user state being a determined first state; or

enable the display of the visual content on the display device based on the user state being a determined second state.

2. The mobile device of claim 1 , further comprising:

a speaker to emit audio content for listening in the secondary user mode of operation of the mobile device; and wherein:

the access control module is configured to at least one of:

restrict the audio content emitted based on the user state being the determined first state; or

enable the audio content emitted based on the user state being the determined second state.

3. The mobile device of claim 1 , wherein the access control module is configured to determine the user state of the user as at least one of an emotion of the user, a physiological state of the user, or a body posture of the user.

4. The mobile device of claim 1 , wherein the access control module is configured to determine the user state of the user as associated with an emotion of the user, and wherein at least one of the determined first state of the user is a negative emotion, or the determined second state of the user is a positive emotion.

5. The mobile device of claim 4 , wherein the access control module is configured to:

detect a change in the user state of the user during the display of the visual content, the change in the user state from the positive emotion to the negative emotion; and

replace the display of the visual content with different visual content that is associated with the positive emotion.

6. The mobile device of claim 4 , wherein the access control module is configured to:

detect a change in the user state of the user during the display of the visual content, the change in the user state from the positive emotion to the negative emotion; and

restrict the display of the visual content based at least in part on the change in the user state.

7. The mobile device of claim 1 , wherein the access control module is configured to detect the user state of the user based at least in part on a facial expression of the user formed by one or more facial features detected in a captured image.

8. The mobile device of claim 1 , wherein the access control module is configured to detect the user state of the user based at least in part on detected audible speech from the user.

9. The mobile device of claim 1 , wherein the access control module is configured to detect the user state of the user based at least in part on biometric information about the user.

10. A method, comprising:

displaying visual content for viewing in a secondary user mode of device operation;

determining that a mobile device is in the secondary user mode based at least in part on displaying the visual content;

obtaining data associated with the secondary user mode using one or more sensors based at least in part on determining that the mobile device is in the secondary user mode;

determining one or more user states of a user reacting to the visual content for viewing in the secondary user mode based at least in part on the data; and at least one of:

restricting the displaying of the visual content based on a determined first state of the user; or

enabling the displaying of the visual content based on a determined second state of the user.

11. The method of claim 10 , further comprising:

emitting audio content for listening in the secondary user mode of the device operation;

determining the one or more user states of a user reacting to the audio content; and at least one of:

restricting the audio content emitted based on the determined first state of the user; or

enabling the audio content emitted based on the determined second state of the user.

12. The method of claim 10 , wherein the one or more user states of the user are at least one of an emotion of the user, a physiological state of the user, or a body posture of the user.

13. The method of claim 10 , wherein the one or more user states of the user are detected as associated with an emotion of the user, and wherein at least one of the determined first state of the user is a negative emotion, or the determined second state of the user is a positive emotion.

14. The method of claim 13 , further comprising:

detecting a change in a user state of the user during the displaying of the visual content, the change in the user state from the positive emotion to the negative emotion; and

replacing the displaying of the visual content with different visual content that is associated with the positive emotion.

15. The method of claim 13 , further comprising:

detecting a change in a user state of the user during the displaying of the visual content, the change in the user state from the positive emotion to the negative emotion; and

restricting the displaying of the visual content based at least in part on the change in the user state.

16. The method of claim 10 , wherein the one or more user states of the user are detected based at least in part on a facial expression of the user formed by one or more facial features detected in a captured image.

17. The method of claim 10 , wherein the one or more user states of the user are detected based at least in part on detected audible speech from the user.

18. The method of claim 10 , wherein the one or more user states of the user are detected based at least in part on biometric information about the user.

19. A system, comprising:

one or more device applications configured to at least one of display visual content or emit audio content in one of a primary user mode or a secondary user mode of operation of the system;

one or more sensors configured to obtain data associated with the secondary user mode; and

an access control module implemented at least partially in hardware, the access control module configured to:

determine that the system is in the secondary user mode;

categorize a determined user state as one of constructive or destructive based at least in part on the data and the determination that the system is in the secondary user mode;

enable use of a first device application associated with the determined user state being constructive; and

restrict use of a second device application associated with the determined user state being destructive.

20. The system of claim 19 , wherein the access control module is configured to categorize the determined user state based on at least one of an age of a user, biometric information of the user, an emotion of the user, a physiological state of the user, or a body posture of the user.