FINGERPRINT IDENTIFICATION APPARATUS AND MANUFACTURING METHOD THEREOF

• US 20180018494A1
• Filed: 09/13/2016
• Published: 01/18/2018
• Est. Priority Date: 07/17/2016
• Status: Active Grant

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Wu, Jen-Chieh
• Granted Patent: US 10,019,615 B2
• Time in Patent Office: Days
• CPC Class Codes: G06F 18/00 Pattern recognition
• CPC Class Codes: G06V 40/1318 using electro-optical elements or layers, e.g. electroluminescent sensing
• CPC Class Codes: G06V 40/1324 by using geometrical optics, e.g. using prisms G06V40/1312 takes precedence
• CPC Class Codes: G06V 40/1359 Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
• CPC Class Codes: G06V 40/1365 Matching; Classification
• CPC Class Codes: G06V 40/14 Vascular patterns
• CPC Class Codes: G06V 40/40 Spoof detection, e.g. liveness detection

Abstract

A fingerprint identification apparatus including an image capture device, at least one light emitting device and a light guide device is provided. The image capture device has a light reception surface. The at least one light emitting device is disposed beside the image capture device. The light guide device shields the at least one light emitting device and has an opening. The opening of the light guide device exposes the light reception surface of the image capture device. The opening of the light guide device is defined by a side wall of the light guide device. The side wall of the light guide device is tilted relative to the light reception surface of the image capture device. Moreover, a manufacturing method of the fingerprint identification apparatus is also provided.

Claims

1. A fingerprint identification apparatus, comprising:

an image capturing device, having a light reception surface;

at least one light-emitting device, disposed beside the image capturing device; and

a light guide device, shielding the at least one light-emitting device and having an opening, wherein the opening of the light guide device exposes the light reception surface of the image capturing device, the opening of the light guide device is defined by a side wall of the light guide device, and the side wall of the light guide device is tilted relative to the light reception surface of the image capturing device.

2. The fingerprint identification apparatus as claimed in claim 1, wherein the fingerprint identification apparatus is adapted to be pressed by a finger, the at least one light-emitting device is adapted to emit a light, and at least a part of the light is refracted by the side wall of the light guide device for propagating to the finger.

3. The fingerprint identification apparatus as claimed in claim 1, wherein an included angle between the side wall of the light guide device and the light reception surface of the image capturing device is an obtuse angle.

4. The fingerprint identification apparatus as claimed in claim 1, wherein the light guide device has a top surface and a bottom surface opposite to each other, a portion of the bottom surface of the light guide device leans against the image capturing device, and the side wall of the light guide device is connected between the top surface and the bottom surface.

5. The fingerprint identification apparatus as claimed in claim 1, further comprising:

a reflecting device, covering a portion of the light guide device, shielding the at least one light-emitting device, and at least exposing the side wall of the light guide device and the light reception surface of the image capturing device.

6. The fingerprint identification apparatus as claimed in claim 5, wherein the at least one light-emitting device is adapted to emit a light, and a part of the light is reflected by the reflecting device for propagating to the side wall of the light guide device.

7. The fingerprint identification apparatus as claimed in claim 1, further comprising:

a circuit board, wherein the image capturing device and the at least one light-emitting device are disposed on the circuit board and electrically connected to the circuit board.

8. The fingerprint identification apparatus as claimed in claim 1, further comprising:

an adhesive, wrapping the at least one light-emitting device, and the light guide device covering the adhesive.

9. The fingerprint identification apparatus as claimed in claim 1, further comprising:

a protection layer, covering the light reception surface of the image capturing device.

10. The fingerprint identification apparatus as claimed in claim 9, further comprising:

a reflecting device, covering a portion of the light guide device, shielding the at least one light-emitting device, and at least exposing the side wall of the light guide device and the light reception surface of the image capturing device, wherein the protection layer has an edge portion extending to a non-active region outside the light reception surface, and the light guide device and the reflecting device cover the edge portion of the protection layer together.

11. The fingerprint identification apparatus as claimed in claim 9, wherein the protection layer is a coating layer or a transparent pressing board.

12. A manufacturing method of a fingerprint identification apparatus, comprising:

providing a circuit board, and disposing an image capturing device and at least one light-emitting device on the circuit board to electrically connect the circuit board, wherein the image capturing device has a light reception surface;

providing a light guide device, wherein the light guide device is disposed on the circuit board and shields the at least one light-emitting device, and the light guide device has an opening exposing the light reception surface of the image capturing device; and

providing a reflecting device pressed on the light guide device and fixed relative to the circuit board.

13. The manufacturing method of the fingerprint identification apparatus as claimed in claim 12, further comprising:

providing a protection layer to cover the light reception surface of the image capturing device.

14. The manufacturing method of the fingerprint identification apparatus as claimed in claim 13, wherein the protection layer has an edge portion extending to a non-active region outside the light reception surface, and the light guide device and the reflecting device cover the edge portion of the protection layer together when the reflecting device is pressed on the light guide device.

15. The manufacturing method of the fingerprint identification apparatus as claimed in claim 13, wherein the protection layer is a coating layer or a transparent pressing board.

16. The manufacturing method of the fingerprint identification apparatus as claimed in claim 12, wherein the opening of the light guide device is defined by a side wall of the light guide device, and the side wall of the light guide device is tilted relative to the light reception surface of the image capturing device.