Granted Patent B2

US 12,412,359 · App. 18/007,636 · Granted Sep 9, 2025

Inventors: Wenzhao Liu (Shenzhen, CN); Xiaogang Feng (Shenzhen, CN); Kun Ma (Shenzhen, CN); Chao Chen (Shenzhen, CN)

Assignee: HONOR DEVICE CO., LTD.

G06V10/147G01B11/22G01B11/2441G06T7/521G06V40/16

Abstract

Claims (92)

1. A method for eliminating an interference pattern in an image, applicable to an electronic device, the electronic device comprising a display screen, a time of flight (ToF) sensor being arranged under the display screen, the ToF sensor comprising an emitting unit and a receiving unit, and the method comprising:

obtaining K interference patterns, wherein the K interference patterns correspond to K different values of a same parameter, and each of the interference patterns is a bright-dark concentric ring generated based on a laser emitted by the emitting unit passing through the display screen;

collecting, by the receiving unit, a first image;

measuring a first parameter value responsive to the receiving unit collecting the first image;

determining a first interference pattern in the K interference patterns, wherein the first interference pattern corresponds to a second parameter value, and wherein a difference between the second parameter value and the first parameter value is less than or equal to a first value; and

eliminating a second interference pattern in the first image, wherein the second interference pattern is determined according to the first interference pattern.

2. The method of claim 1 , wherein the parameter is one of a temperature, or a wavelength of the laser emitted by the emitting unit, or an exposure time for the receiving unit to collect an image, or an ambient light intensity.

3. The method of claim 1 , wherein the second interference pattern being determined according to the first interference pattern comprises the second interference pattern being the first interference pattern.

4. The method of claim 1 , wherein the second interference pattern being determined according to the first interference pattern comprises:

either a) the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

5. The method of claim 2 , wherein determining the second interference pattern according to the first interference pattern comprises:

either a) when the first parameter value is greater than the second parameter value, the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) when the first parameter value is less than the second parameter value, the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

6. The method of claim 2 , wherein when the parameter is the ambient light intensity in a case that the receiving unit collects the image, the second interference pattern is determined according to the first interference pattern comprises:

either a) when the first parameter value is less than the second parameter value, the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) when the first parameter value is greater than the second parameter value, the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

7. The method of claim 4 , wherein enlarging or decreasing the radius of each circular ring in the first interference pattern comprises an enlarged value or a decreased value of a radius of a circular ring of an m-th interference order in the first interference pattern being:

(

4

⁢

f

2

⁢

h

2

⁢

n

)

/

λ

2

⁢

m

i

2

⁢

4

⁢

f

2

⁢

h

2

⁢

n

2

λ

2

⁢

m

i

2

-

f

2

,

wherein λ is a wavelength of the laser emitted by the emitting unit, f is a focal length of a lens of the ToF sensor, n is a refractive index of a screen layer in which refraction occurs in the display screen, and h is a thickness of the screen layer in which refraction occurs in the display screen.

8. The method of claim 1 , wherein generating each of the interference patterns comprises each of the interference patterns being generated based on the receiving unit receiving a reflection from an object through the display screen of the laser emitted by the emitting unit, or being generated based on the receiving unit receiving a reflection from an object of the laser emitted by the emitting unit passing through the display screen.

9. The method of claim 1 , wherein in a case that a difference between a third parameter value and the first parameter value is equal to the difference between the second parameter value and the first parameter value, the second parameter value is greater than the third parameter value.

10. An electronic device, comprising:

one or more processors;

a display screen, wherein a time of flight (ToF) sensor is arranged under the display screen, wherein the ToF sensor comprises an emitting unit and a receiving unit; and

a memory coupled to the one or more processors and configured to store computer instructions that, when executed by the electronic device, cause the electronic device to be configured to:

obtain K interference patterns, wherein the K interference patterns correspond to K different values of a same parameter, and each of the interference patterns is a bright-dark concentric ring generated based on laser emitted by the emitting unit passing through the display screen;

collect, by the receiving unit, a first image;

measure a first parameter value responsive to the receiving unit collecting the first image;

determine a first interference pattern in the K interference patterns, wherein the first interference pattern corresponds to a second parameter value, and wherein a difference between the second parameter value and the first parameter value is less than or equal to a first value; and

eliminate a second interference pattern in the first image, wherein the second interference pattern is determined according to the first interference pattern.

11. The electronic device of claim 10 , wherein the parameter is one of a temperature, or a wavelength of the laser emitted by the emitting unit, or an exposure time for the receiving unit to collect an image, or ambient light intensity.

12. The electronic device of claim 10 , wherein the second interference pattern being determined according to the first interference pattern comprises the second interference pattern being the first interference pattern.

13. The electronic device of claim 10 , wherein the second interference pattern being determined according to the first interference pattern comprises:

either a) the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

14. The electronic device of claim 11 , wherein determining the second interference pattern according to the first interference pattern comprises:

either a) when the first parameter value is greater than the second parameter value, the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) when the first parameter value is less than the second parameter value, the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

15. The electronic device of claim 11 , wherein when the parameter is the ambient light intensity in a case that the receiving unit collects the image, the second interference pattern is determined according to the first interference pattern comprises:

either a) when the first parameter value is less than the second parameter value, the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) when the first parameter value is greater than the second parameter value, the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

16. The electronic device of claim 10 , wherein generating each of the interference patterns comprises each of the interference patterns being generated based on the receiving unit receiving a reflection from an object through the display screen of the laser emitted by the emitting unit, or being generated based on the receiving unit receiving a reflection from an object of the laser emitted by the emitting unit passing through the display screen.

17. A non-transitory computer-readable storage medium comprising instructions that, when executed by a processor, cause the processor to be configured to:

obtain K interference patterns, wherein the K interference patterns correspond to K different values of a same parameter, and each of the interference patterns is a bright-dark concentric ring generated based on a laser emitted by the an emitting unit of a sensor passing through a display screen;

collect, by a receiving unit of the sensor, a first image;

measure a first parameter value responsive to the receiving unit collecting the first image;

determine a first interference pattern in the K interference patterns, wherein the first interference pattern corresponds to a second parameter value, and wherein a difference between the second parameter value and the first parameter value is less than or equal to a first value; and

eliminate a second interference pattern in the first image, wherein the second interference pattern is determined according to the first interference pattern.

18. The non-transitory computer-readable storage medium of claim 17 , wherein the parameter is one of a temperature, or a wavelength of the laser emitted by the emitting unit, or an exposure time for the receiving unit to collect an image, or ambient light intensity.

19. The non-transitory computer-readable storage medium of claim 17 , wherein the second interference pattern being determined according to the first interference pattern comprises the second interference pattern being the first interference pattern.

20. The non-transitory computer-readable storage medium of claim 17 , wherein the second interference pattern being determined according to the first interference pattern comprises:

either a) the second interference pattern being generated by enlarging a radius of each circular ring in the first interference pattern; or

b) the second interference pattern being generated by decreasing a radius of each circular ring in the first interference pattern.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (28)