Fingerprint identification apparatus and electronic device

Patent metadata

Field	Value
Publication number	US-11335129-B2
Application number	US-202017025840-A
Country	US
Kind code	B2
Filing date	Sep 18, 2020
Priority date	Mar 18, 2020
Publication date	May 17, 2022
Grant date	May 17, 2022

Abstract

Embodiments of the present application disclose a fingerprint identification apparatus and an electronic device. The fingerprint identification apparatus is used to be disposed under a display screen and includes a first filter layer and a fingerprint sensor, and the first filter layer is disposed above the fingerprint sensor, the first filter layer includes a plurality of first filter units, and the plurality of first filter units are disposed in a region of the first filter layer corresponding to an edge region of the fingerprint sensor; sensing units of the edge region of the fingerprint sensor are configured to receive a light signal returned by a finger above the display screen and filtered by the plurality of first filter units; and sensing units of a middle region of the fingerprint sensor are configured to receive a light signal returned by the finger, to generate a fingerprint image of the finger.

First claim

What is claimed is:

1. A fingerprint identification apparatus, wherein the fingerprint identification apparatus is used to be disposed under a display screen, the fingerprint identification apparatus comprising:
a first filter layer and a fingerprint sensor,
wherein:
the first filter layer is disposed above the fingerprint sensor,
the first filter layer comprises a plurality of first filter units, and the plurality of first filter units are disposed in a region of the first filter layer corresponding to an edge region of the fingerprint sensor;
sensing units of the edge region of the fingerprint sensor are configured to receive a light signal returned by a finger above the display screen and filtered by the plurality of first filter units, to detect whether the finger is a real finger; and
sensing units of a middle region of the fingerprint sensor are configured to receive a light signal returned by the finger, to generate a fingerprint image of the finger;
wherein the fingerprint identification apparatus further comprises:
a micro-lens array being disposed above the first filter layer and is configured to converge the light signal returned by the finger to sensing units of the fingerprint sensor; and
at least one light shielding layer being disposed between the micro-lens array and the fingerprint sensor, each of the at least one light shielding layer is provided with an array of small holes, and the array of small holes is configured to guide the light signal converged by the micro-lens array to sensing units of the fingerprint sensor.

2. The fingerprint identification apparatus according to claim 1 , wherein the first filter units comprise filter units in at least one color, the at least one color comprise a red filter unit, a green filter unit, a blue filter unit, a cyan filter unit and a yellow filter unit.

3. The fingerprint identification apparatus according to claim 1 , wherein the first filter units at least comprise a red filter unit.

4. The fingerprint identification apparatus according to claim 3 , wherein the first filter units comprise a red filter unit, a green filter unit and a blue filter unit and two adjacent first filter units are different in color.

5. The fingerprint identification apparatus according to claim 1 , wherein the first filter units comprise at least one red filter unit, at least one green filter unit and at least one blue filter unit, and the plurality of first filter units are sequentially arranged in an order of a red filter unit, a green filter unit and a blue filter unit; or in an order of a red filter unit, a red filter unit, a green filter unit, a green filter unit, a blue filter unit and a blue filter unit; or in an order of a red filter unit, a green filter unit, a red filter unit, a green filter unit, a blue filter unit and a blue filter unit.

6. The fingerprint identification apparatus according to claim 1 , wherein the edge region of the fingerprint sensor is a region where at least one circle of sensing units of an outermost side of the fingerprint sensor is located.

7. The fingerprint identification apparatus according to claim 1 , wherein the first filter layer further comprises a transparent region, and the transparent layer is a region of the first filter layer corresponding to the middle region of the fingerprint sensor, and
the sensing units of the middle region of the fingerprint sensor are configured to receive a light signal returned by the finger and passing through the transparent region to generate a fingerprint image of the finger.

8. The fingerprint identification apparatus according to claim 1 , wherein the first filter layer further comprises a plurality of second filter units, and the plurality of second filter units are disposed in a region of the first filter layer corresponding to the middle region of the fingerprint sensor, wherein the plurality of second filter units and the plurality of first filter units are different in color, and
the sensing units of the middle region of the fingerprint sensor are configured to receive a light signal returned by the finger and filtered by the plurality of second filter units to generate a fingerprint image of the finger.

9. The fingerprint identification apparatus according to claim 8 , wherein the second filter units are monochromatic filter units and configured to filter out an infrared light signal.

10. The fingerprint identification apparatus according to claim 8 , wherein the second filter units are green filter units.

11. The fingerprint identification apparatus according to claim 1 , wherein one filter unit in the first filter layer corresponds to one sensing unit in the fingerprint sensor, and the one sensing unit is configured to receive a light signal returned by the finger and filtered by the corresponding one filter unit.

12. The fingerprint identification apparatus according to claim 1 , further comprising a second filter layer, wherein the second filter layer is disposed between the first filter layer and the fingerprint sensor and is configured to filter out an infrared light signal.

13. The fingerprint identification apparatus according to claim 1 , wherein a metal wiring layer is disposed inside the fingerprint sensor, and the metal wiring layer is one of the at least one light shielding layer.

14. An electronic device, comprising:
a display screen; and
the fingerprint identification apparatus according to claim 1 , wherein the fingerprint identification apparatus is disposed under the display screen.

15. A fingerprint identification apparatus, wherein the fingerprint identification apparatus is used to be disposed under a display screen, the fingerprint identification apparatus comprising:
a first filter layer and a fingerprint sensor,
wherein:
the first filter layer is disposed above the fingerprint sensor,
the first filter layer comprises a plurality of first filter units and a second optical unit, the plurality of first filter units are disposed in a region of the first filter layer corresponding to an edge region of the fingerprint sensor, the second optical unit is disposed in a region of the first filter layer corresponding to the middle region of the fingerprint sensor, the second optical unit comprise a transparent region or a plurality of second filter units;
sensing units of the edge region of the fingerprint sensor are configured to receive a light signal returned by a finger above the display screen and filtered by the plurality of first filter units, and sensing units of the middle region of the fingerprint sensor are configured to receive a light signal returned by the finger and passing through the transparent region to generate a fingerprint image of the finger;
wherein the fingerprint identification apparatus further comprises:
a micro-lens array being disposed above the first filter layer and is configured to converge the light signal returned by the finger to sensing units of the fingerprint sensor; and
at least one light shielding layer being disposed between the micro-lens array and the fingerprint sensor, each of the at least one light shielding layer is provided with an array of small holes, and the array of small holes is configured to guide the light signal converged by the micro-lens array to sensing units of the fingerprint sensor.

16. The fingerprint identification apparatus according to claim 15 , wherein the first filter units comprise filter units in at least one color, the at least one color comprise a red filter unit, a green filter unit, a blue filter unit, a cyan filter unit and a yellow filter unit.

17.

Assignees

• Shenzhen Goodix Tech Co Ltd

Inventors

• Li Huafei

Classifications

• G06V40/1394 Primary

  using acquisition arrangements · CPC title

• G06V10/143

  Sensing or illuminating at different wavelengths · CPC title

• G06V40/40 Primary

  Spoof detection, e.g. liveness detection · CPC title

• G06V40/1318 Primary

  using electro-optical elements or layers, e.g. electroluminescent sensing · CPC title

• G02B3/0006

  Arrays (G02B3/02, G02B5/188 take precedence) · CPC title