Fingerprint sensing device and fingerprint sensing method

1. A fingerprint sensing device, comprising:

a transparent panel;

an illumination source, configured to sequentially provide a plurality of illuminating patterns during one exposure period to sequentially illuminate a finger object placed on the transparent panel;

a fingerprint sensor, comprising a plurality of image sensing units, wherein the image sensing units sense the finger object illuminated by the illuminating patterns provided by the illumination source during the one exposure period to output a plurality of pixel data; and

a processor, coupled to the illumination source and the fingerprint sensor, and configured to receive the pixel data to generate a fingerprint image according to the pixel data,

wherein each of the illuminating patterns comprises a plurality of bright regions and a plurality of dark regions arranged in sequence, the bright regions and the dark regions are dynamically displaced in the illuminating patterns,

wherein each of the pixel data comprises a fingerprint information parameter and a noise parameter, the fingerprint information parameter is a sum of a plurality of sub-fingerprint parameters, and the noise parameter is a sum of sub-noise parameters,

the number of the sub-fingerprint parameters and the number of the sub-noise parameters are equal to the number of the illuminating patterns,

wherein a value of one of the sub-noise parameters is higher than a value of one of the corresponding sub-fingerprint parameters, and values of the other sub-noise parameters are respectively lower than values of the other corresponding sub-fingerprint parameters.

2. The fingerprint sensing device according to claim 1 , wherein the bright regions and the dark regions are dynamically displaced in the illuminating patterns in a first direction.

3. The fingerprint sensing device according to claim 2 , wherein the illumination source is a plurality of pixels of a self-illuminating panel,

the bright regions corresponding to one illuminated pixel of the self-illuminating panel, and the dark regions corresponding to a plurality of consecutive unilluminated pixels of the self-illuminating panel.

4. The fingerprint sensing device according to claim 3 , wherein a total number of the one pixel of the self-illuminating panel illuminated in the first direction and the plurality of consecutive unilluminated pixels is equal to the number of the illuminating patterns sequentially provided by the illumination source during the one exposure period.

5. The fingerprint sensing device according to claim 1 , wherein a switching frequency of the illuminating patterns is equal to a display refresh frequency.

6. The fingerprint sensing device according to claim 1 , wherein the illumination source provides the illuminating patterns in cycles to illuminate the finger object during the one exposure period.

7. A fingerprint sensing method, comprising:

sequentially providing a plurality of illuminating patterns during one exposure period by an illumination source to sequentially illuminate a finger object placed on a transparent panel, wherein each of the illuminating patterns comprises a plurality of bright regions and a plurality of dark regions arranged in sequence, the bright regions and the dark regions are dynamically displaced in the illuminating patterns;

sensing the finger object illuminated by the illuminating patterns provided by the illumination source during the one exposure period to output a plurality of pixel data by a plurality of image sensing units of a fingerprint sensor; and

receiving the pixel data by a processor, and generating a fingerprint image according to the pixel data,

wherein each of the pixel data comprises a fingerprint information parameter and a noise parameter, the fingerprint information parameter is a sum of a plurality of sub-fingerprint parameters, and the noise parameter is a sum of sub-noise parameters,

the number of the sub-fingerprint parameters and the number of the sub-noise parameters are equal to the number of the illuminating patterns,

wherein a value of one of the sub-noise parameters is higher than a value of one of the corresponding sub-fingerprint parameters, and values of the other sub-noise parameters are respectively lower than values of the other corresponding sub-fingerprint parameters.

8. The fingerprint sensing method according to claim 7 , wherein the bright regions and the dark regions are dynamically displaced in the illuminating patterns in a first direction.

9. The fingerprint sensing method according to claim 8 , wherein the illumination source is a plurality of pixels of a self-illuminating panel,

the bright regions corresponding to one illuminated pixel on the self-illuminating panel, and the dark regions corresponding to a plurality of consecutive unilluminated pixels on the self-illuminating panel.

10. The fingerprint sensing method according to claim 9 , wherein a total number of the one pixel of the self-illuminating panel illuminated in the first direction and the plurality of consecutive unilluminated pixels is equal to the number of the illuminating patterns sequentially provided by the illumination source during the one exposure period.

11. The fingerprint sensing method according to claim 7 , wherein a switching frequency of the illuminating patterns is equal to a display refresh frequency.

12. The fingerprint sensing method according to claim 7 , wherein the illumination source provides the illuminating patterns in cycles to illuminate the finger object during the one exposure period.