Fingerprint identification apparatus and manufacturing method thereof

• US 10,019,615 B2
• Filed: 09/13/2016
• Issued: 07/10/2018
• Est. Priority Date: 07/17/2016
• Status: Active Grant

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Wu, Jen-Chieh
• Primary Examiner(s): Werner, Brian P
• Application Number:
  US15/264,582
• Publication Number:
  US 20180018494A1
• Time in Patent Office: 665 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;

an adhesive, wrapping the at least one light-emitting device;

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;

a reflecting device, disposed above the at least one light-emitting device, wherein the light guide device is located between the reflecting device and the adhesive, and the reflecting device covers a portion of the light guide device, shields the at least one light-emitting device, and at least exposes the side wall of the light guide device and the light reception surface of the image capturing device; and

a protection layer, covering the light reception surface of the image capturing device and having an edge portion extending to a non-active region outside the light reception surface, wherein the light guide device and the reflecting device cover the edge portion of the protection layer together.

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, 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.

6. 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.

7. The fingerprint identification apparatus as claimed in claim 1, wherein the light guide device directly covers the adhesive.

8. The fingerprint identification apparatus as claimed in claim 1, wherein the protection layer is a coating layer or a transparent pressing board.

9. 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 an adhesive, wherein the adhesive is used to wrap the at least one light-emitting device;

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;

providing a reflecting device pressed on the light guide device and fixed relative to the circuit board, wherein the light guide device is located between the reflecting device and the adhesive; and

providing a protection layer to cover 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 when the reflecting device is pressed on the light guide device.

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

11. The manufacturing method of the fingerprint identification apparatus as claimed in claim 9, 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.

12. 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;

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 first side wall of the light guide device, the first side wall of the light guide device is tilted relative to the light reception surface of the image capturing device, and the light guide device has a second side wall opposite to the first side wall and a top surface connected between the first side wall and the second side wall; and

a reflecting device, having a first reflective surface and a second reflective surface, wherein the first reflective surface covers the top surface of the light guide device, the second reflective surface covers the second side surface of the light guide device and is disposed perpendicularly to the first reflective surface, and a part of a light emitted by the at least one light-emitting device is reflected by the second reflective surface toward the first side wall of the light guide device.

13. The fingerprint identification apparatus as claimed in claim 12, 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.

14. The fingerprint identification apparatus as claimed in claim 12, 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.

15. The fingerprint identification apparatus as claimed in claim 12, 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.

16. The fingerprint identification apparatus as claimed in claim 12, further comprising:

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

17. The fingerprint identification apparatus as claimed in claim 12, further comprising:

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

18. The fingerprint identification apparatus as claimed in claim 17, wherein the reflecting device covers a portion of the light guide device, shields the at least one light-emitting device, and at least exposes the side wall of the light guide device and the light reception surface of the image capturing device, 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.