Touch control method integrating fingerprint recognition and touch operation modes

1. A touch control method, configured to control a touch operation mode and a fingerprint recognition mode, the method comprising:

providing a touch device, wherein the touch device comprises a plurality of sensing electrodes;

determining whether an object is located in a sensing distance of the sensing electrodes;

when result of the determining is yes, detecting a sensing group of the sensing electrodes sensing the object;

determining whether a sensing area of the sensing group is greater than or equal to a first area and less than or equal to a second area;

determining whether a sensing time of a predetermined proportion of the sensing electrodes in the sensing group is greater than or equal to a predetermined time;

if the sensing area is greater than or equal to the first area and less than or equal to the second area, and if the sensing time is greater than or equal to the predetermined time, executing the fingerprint recognition mode; and

if the sensing area is less than the first area or greater than the second area, or if the sensing time is less than the predetermined time, executing the touch operation mode.

2. The touch control method according to claim 1 , wherein the fingerprint recognition mode comprising:

detecting at least a portion of the sensing electrodes of the touch electrodes in the sensing group;

obtaining a fingerprint image; and

detecting a fingerprint feature of the fingerprint image and generating a determination result.

3. The touch control method according to claim 2 , further comprising:

executing a fingerprint authentication action according to the determination result, wherein the fingerprint authentication action comprises an unlock action, an authentication action, and an open action.

4. The touch control method according to claim 3 , wherein the authentication action comprises an identity authentication action, a file encryption/decryption action, and an online payment action.

5. The touch control method according to claim 3 , wherein the open action comprises a file open authorization action and an application open authorization action.

6. The touch control method according to claim 1 , wherein an area of each sensing electrode is less than or equal to 40000 μm2.

7. The touch control method according to claim 1 , wherein the touch device further comprises a display screen, the sensing electrodes are located on a display region of the display screen.

8. The touch control method according to claim 7 , further comprising:

determining whether a sensing area of the sensing group is greater than a predetermined area when the touch operation mode is executed; and

when result of the determining is yes, executing a standby procedure.

9. The touch control method according to claim 8 , wherein the predetermined area is greater than or equal to ⅘ or ⅔ of a total area of the display region.

10. The touch control method according to claim 8 , wherein the standby procedure comprises:

turning off the display screen; and

after a predetermined standby time, re-executing the determining of whether the object is located in the sensing distance of the touch electrodes.