Apparatus for recognizing pressure and electronic apparatus including the same

1. A pressure recognition apparatus comprising:

a fingerprint sensor comprising a touch surface touchable by a user, the fingerprint sensor being configured to sense information about a fingerprint of the user input to the touch surface; and

a processor configured to;

extract, from sensed fingerprint information, a feature profile of the fingerprint;

extract, from a reference fingerprint information, a reference profile representing a feature of the fingerprint of the user; and

determine an intensity of pressure applied to the touch surface based on a comparison of the feature profile with the reference profile.

2. The pressure recognition apparatus of claim 1 , further comprising a memory,

wherein the reference fingerprint information of the user is stored in the memory.

3. The pressure recognition apparatus of claim 1 , wherein the reference profile is a reference height profile comprising a reference ridge/valley height distribution of the fingerprint of the user.

4. The pressure recognition apparatus of claim 3 , wherein the processor is further configured to extract, from the reference fingerprint information, a plurality of reference height profiles respectively matched with touch states.

5. The pressure recognition apparatus of claim 3 , wherein the feature profile is a height profile comprising a sensed ridge/valley height distribution of the fingerprint of the user.

6. The pressure recognition apparatus of claim 5 , wherein the processor is configured to calculate the intensity of the pressure applied to the touch surface based on a comparison of the reference height profile and the height profile.

7. The pressure recognition apparatus of claim 1 , wherein the reference profile is a reference contrast profile comprising a contrast, representing a ratio between black and white, of a fingerprint image of the fingerprint of the user.

8. The pressure recognition apparatus of claim 7 , wherein the processor is further configured to extract, from the reference fingerprint information, a plurality of reference contrast profiles respectively matched with touch states.

9. The pressure recognition apparatus of claim 7 , wherein the feature profile is a contrast profile of the fingerprint image.

10. The pressure recognition apparatus of claim 9 , wherein the processor is configured to calculate the intensity of the pressure applied to the touch surface based on a comparison of the reference contrast profile and the contrast profile.

11. The pressure recognition apparatus of claim 1 , wherein the fingerprint sensor is a capacitance-type sensor.

12. The pressure recognition apparatus of claim 1 , wherein the fingerprint sensor is an optical sensor.

13. The pressure recognition apparatus of claim 1 , wherein the processor is further configured to determine the intensity of pressure applied to the touch surface based on a comparison of the feature profile with the reference profile, and

wherein, based on one of a plurality of preset conditions of the intensity of pressure being satisfied, the plurality of preset conditions being allocated with respective commands, the processor is further configured to execute a command allocated to the one of the plurality of preset conditions of the intensity of pressure.

14. An electronic apparatus comprising:

a fingerprint sensor comprising a touch surface touchable by a user, the fingerprint sensor being configured to sense information about a fingerprint of the user input to the touch surface;

a memory configured to store an application module that uses an intensity of a pressure input by the user as a parameter, and a pressure calculation module that extracts, from sensed fingerprint information, a feature profile of an image of the fingerprint; extracts, from a reference fingerprint information, a reference profile representing a feature of the fingerprint of the user; and calculates the intensity of a pressure applied to the touch surface based on a comparison of the feature profile with the reference profile; and

a processor configured to execute the application module and the pressure calculation module.

15. The electronic apparatus of claim 14 , further comprising a display panel controlled by the processor and configured to provide an execution screen of the application module.

16. The electronic apparatus of claim 15 , wherein the touch surface of the fingerprint sensor is disposed on a display surface of the display panel.

17. The electronic apparatus of claim 14 , wherein the reference fingerprint information of the user is stored in the memory.

18. The electronic apparatus of claim 17 , wherein the memory further stores a reference height profile comprising a reference ridge/valley height distribution of the fingerprint of the user.

19. The electronic apparatus of claim 18 , wherein the pressure calculation module comprises command for extracting, from the sensed fingerprint information, a height profile comprising a sensed ridge/valley height distribution of the fingerprint of the user and comparing the reference height profile with the height profile.

20. The electronic apparatus of claim 17 , wherein the memory is further configured to store a reference contrast profile comprising a contrast of a fingerprint image.

21. The electronic apparatus of claim 20 , wherein the pressure calculation module comprises command for extracting, from the sensed fingerprint information, a contrast profile of the fingerprint image and comparing the reference contrast profile with the contrast profile.