Fingerprint detection apparatus and electronic device

1. A fingerprint detection apparatus, wherein the fingerprint detection apparatus is applied under a display screen to implement under-screen optical fingerprint identification, and the apparatus comprises: a fingerprint sensor;

the fingerprint sensor comprises: N groups of sub-pixels, wherein N is a positive integer greater than 1; and

different groups of sub-pixels in the N groups of sub-pixels respectively receive light signals in different directions in light signals returned by reflection or scattering via a finger, and light signals in the same direction received by each group of sub-pixels in the N groups of sub-pixels are used to form one pixel in a fingerprint image of the finger;

wherein the N groups of sub-pixels comprise a first group of sub-pixels, a plurality of first sub-pixels in the first group of sub-pixels are not adjacent to each other, and the plurality of first sub-pixels in the first group of sub-pixels are adjacent to other sub-pixels in the N groups of sub-pixels other than the first group of sub-pixels.

2. The fingerprint detection apparatus according to claim 1 , wherein the fingerprint sensor comprises: M*N groups of sub-pixels, wherein M is a positive integer; and

light signals received by the N groups of sub-pixels are used to form N fingerprint images of the finger, and each of the N fingerprint images of the finger has M pixels.

3. The fingerprint detection apparatus according to claim 2 , wherein the N fingerprint images are superimposed to obtain one fingerprint image with high resolution for fingerprint identification.

4. The fingerprint detection apparatus according to claim 1 , wherein each group of sub-pixels in the N groups of sub-pixels comprises a plurality of sub-pixels, and a sum of a plurality of light signals received by the plurality of sub-pixels is used to form one pixel in the fingerprint image of the finger.

5. The fingerprint detection apparatus according to claim 1 , wherein each group of sub-pixels in the N groups of sub-pixels comprises one sub-pixel, and light signal received by the one sub-pixel is used to form one pixel in the fingerprint image of the finger.

6. The fingerprint detection apparatus according to claim 1 , wherein the number of sub-pixels in each group of sub-pixels in the N groups of sub-pixels is equal.

7. The fingerprint detection apparatus according to claim 1 , wherein the N groups of sub-pixels comprise a first group of sub-pixels, and a plurality of first sub-pixels in the first group of sub-pixels are adjacent to each other.

8. The fingerprint detection apparatus according to claim 1 , wherein each group of sub-pixels in the N groups of sub-pixels is arranged in the same manner in the N groups of sub-pixels.

9. The fingerprint detection apparatus according to claim 1 , wherein each sub-pixel in the N groups of sub-pixels has the same shape and size, and is arranged in an array.

10. The fingerprint detection apparatus according to claim 1 , wherein N=4.

11. The fingerprint detection apparatus according to claim 10 , the N groups of sub-pixels comprises a first group of sub-pixels, a second group of sub-pixels, a third group of sub-pixels and a fourth group of sub-pixels;

wherein the first group of sub-pixels comprises four first sub-pixels, the second group of sub-pixels comprises four second sub-pixels, the third group of sub-pixels comprises four third sub-pixels, and the fourth group of sub-pixels comprises four fourth sub-pixels;

the four first sub-pixels are not adjacent to each other, the four second sub-pixels are not adjacent to each other, the four third sub-pixels are not adjacent to each other and the four fourth sub-pixels are not adjacent to each other; and

a first sub-pixel, a second sub-pixel, a third sub-pixel, and a fourth sub-pixel are adjacent to each other.

12. The fingerprint detection apparatus according to claim 1 , wherein each group of sub-pixels in the N groups of sub-pixels comprises K sub-pixels, wherein K is an integer greater than 1, and the fingerprint detection apparatus further comprises: a processing unit;

the K sub-pixels are configured to convert received light signals into K electrical signals; and

the processing unit is configured to sum the K electrical signals to obtain one pixel in the fingerprint image of the finger.

13. The fingerprint detection apparatus according to claim 12 , wherein the processing unit comprises N sub-processing units, and one of the N sub-processing units is configured to sum one group of sub-pixels in the N groups of sub-pixels.

14. The fingerprint detection apparatus according to claim 12 , wherein the processing unit comprises a first sub-processing unit, the N groups of sub-pixels comprise a first group of sub-pixels, and the first sub-processing unit is connected to K sub-pixels in the first group of sub-pixels through K signal lines.

15. The fingerprint detection apparatus according to claim 14 , wherein the first sub-processing unit is configured to receive K first electrical signals of the K sub-pixels in the first group of sub-pixels at the same time, and perform a summing calculation on the K first electrical signals.

16. The fingerprint detection apparatus according to claim 1 , wherein the fingerprint detection apparatus further comprises: an optical component, the optional component is configured to be passed through by light signals in different directions;

wherein the optional component comprises: a micro-lens array and at least one light shielding layer;

the micro-lens array is configured to be disposed under the display screen and comprises a plurality of micro-lenses;

the at least one light shielding layer is disposed under the micro-lens array and provided with a plurality of light directing channels corresponding to each micro-lens of the plurality of micro-lenses; and

the N groups of sub-pixels and is disposed under the at least one light shielding layer, and one sub-pixel is disposed under each of the plurality of light directing channels corresponding to the each micro-lens.

17. The fingerprint detection apparatus according to claim 16 , light directing channels corresponding to different groups of sub-pixels in the N groups of sub-pixels have different directions, and light directing channels corresponding to the same group of sub-pixels in the N groups of sub-pixels have the same direction.

18. The fingerprint detection apparatus according to claim 16 , the plurality of light directing channels corresponding to each micro-lens are all located under the current micro-lens and do not extend under an adjacent micro-lens, and a plurality of sub-pixels corresponding to the plurality of light directing channels are all located under the current micro-lens.

19. An electronic device, comprising:

a display screen and a fingerprint detection apparatus, wherein the fingerprint detection apparatus is disposed under the display screen, and the fingerprint detection apparatus comprises:

a fingerprint sensor;

the fingerprint sensor comprises: N groups of sub-pixels, wherein N is a positive integer greater than 1; and

different groups of sub-pixels in the N groups of sub-pixels respectively receive light signals in different directions in light signals returned by reflection or scattering via a finger, and light signals in the same direction received by each group of sub-pixels in the N groups of sub-pixels are used to form one pixel in a fingerprint image of the finger;

wherein the N groups of sub-pixels comprise a first group of sub-pixels, a plurality of first sub-pixels in the first group of sub-pixels are not adjacent to each other, and the plurality of first sub-pixels in the first group of sub-pixels are adjacent to other sub-pixels in the N groups of sub-pixels other than the first group of sub-pixels.