Method for fingerprint collection and related products

1. A terminal device comprising an application processor (AP), a touch display screen, and an optical fingerprint sensor disposed under the touch display screen, wherein:

the touch display screen comprises N areas for fingerprint collection, wherein N is a positive integer;

the AP is configured to:

control light-emitting units of the touch display screen to emit monochromatic light, wherein the monochromatic light is configured to illuminate a fingerprint of a user and each kind of monochromatic light corresponds to at least one light-emitting material;

control light-emitting units in one of the N areas to emit the monochromatic light;

determine, for the touch display screen or one of the N areas, service life of at least one light-emitting material corresponding to red light, blue light, and green light respectively; and

control the light-emitting units of the touch display screen or the light-emitting units in one of the N areas to emit light of a target color as the monochromatic light, wherein the light of target color has a longest service life; and

the optical fingerprint sensor is configured to collect the fingerprint of the user illuminated by the monochromatic light.

2. The terminal device of claim 1 , wherein the touch display screen is one of:

a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, and a light-emitting diode (LED) display.

3. The terminal device of claim 1 , wherein the monochromatic light is green light, red light, or blue light.

4. The terminal device of claim 1 , wherein the N areas do not overlap with each other.

5. The terminal device of claim 1 , wherein the N areas correspond to N sets of time periods; and the AP is configured to control light-emitting units in an area i corresponding to a current system time to emit the monochromatic light, wherein the area i is one of the N areas.

6. The terminal device of claim 5 , wherein each set of time periods contains at least one time period and each time period corresponds to one kind of monochromatic light; and the AP is configured to control light-emitting units in the area i to emit monochromatic light corresponding to the current system time.

7. A method for fingerprint collection of a terminal device, comprising:

controlling, with an application processor (AP) of the terminal device: light-emitting units of a touch display screen of the terminal device, that comprises of N areas for fingerprint collections, to emit monochromatic light, wherein the monochromatic light is configured to illuminate a fingerprint of a user, wherein N is a positive integer, and wherein each kind of monochromatic light corresponds to at least one light-emitting material;

controlling, with the AP of the terminal device, light-emitting units in one of the N areas to emit the monochromatic light;

determining for the touch display screen or one of the N areas, with the AP of the terminal device, service life of at least one light-emitting material corresponding to red light, blue light, and green light respectively;

controlling, with the AP of the terminal device, the light-emitting units of the touch display screen or the light-emitting units in one of the N areas to emit light of a target color as the monochromatic light, wherein the light of the target color has a longest service life; and

collecting, with an optical fingerprint sensor of the terminal device, the fingerprint of the user illuminated by the monochromatic light, wherein the optical fingerprint sensor is disposed under the touch display screen.

8. The method of claim 7 , wherein the touch display screen is one of: a liquid crystal display (LCD), an organic light-emitting diode (OLED) display, and a light-emitting diode (LED) display.

9. The method of claim 7 , wherein the monochromatic light is green light, red light, or blue light.

10. The method of claim 7 , wherein the N areas do not overlap with each other.

11. The method of claim 7 , wherein the N areas correspond to N sets of time periods; and controlling the light-emitting units in one of the N areas to emit the monochromatic light comprises: controlling light-emitting units in an area i corresponding to a current system time to emit the monochromatic light, wherein the area i is one of the N areas.

12. The method of claim 11 , wherein each set of time periods contains at least one time period and each time period corresponds to one kind of monochromatic light;

and controlling the light-emitting units in the area i corresponding to the current system time to emit the monochromatic light comprises: controlling the light-emitting units in the area i to emit monochromatic light corresponding to the current system time.

13. A non-transitory computer readable storage medium storing a computer program which, when executed by a terminal device, causes the terminal device to carry out actions, comprising:

controlling, with an application processor (AP) of the terminal device: light-emitting units of a touch display screen of the terminal device, that comprises of N areas for fingerprint collections, to emit monochromatic light, wherein the monochromatic light is configured to illuminate a fingerprint of a user, wherein N is a positive integer, and wherein each kind of monochromatic light corresponds to at least one light-emitting material;

controlling, with the AP of the terminal device, light-emitting units in one of the N areas to emit the monochromatic light;

determining for the touch display screen or one of the N areas, with the AP of the terminal device, service life of at least one light-emitting material corresponding to red light, blue light, and green light respectively;

controlling, with the AP of the terminal device, the light-emitting units of the touch display screen or the light-emitting units in one of the N areas to emit light of a target color as the monochromatic light, wherein the light of the target color has a longest service life; and

collecting, with an optical fingerprint sensor of the terminal device, the fingerprint of the user illuminated by the monochromatic light, wherein the optical fingerprint sensor is disposed under the touch display screen.

14. The non-transitory computer readable storage medium of claim 13 , wherein the N areas do not overlap with each other.

15. The non-transitory computer readable storage medium of claim 14 , wherein the N areas correspond to N sets of time periods; and the computer program executed by the terminal device to carry out the action of controlling the light-emitting units in one of the N areas to emit the monochromatic light is executed by the terminal device to carry out actions, comprising: controlling light-emitting units in an area i corresponding to a current system time to emit the monochromatic light, wherein the area i is one of the N areas.