Optical fingerprint sensing module and electronic device

• US 11,144,745 B2
• Filed: 04/14/2019
• Issued: 10/12/2021
• Est. Priority Date: 07/23/2018
• Status: Active Grant

• Current Assignee: Egis Technology Inc.
• Original Assignee: Egis Technology Inc.
• Inventors: Chen, Pin-Yu
• Primary Examiner(s): Geisel, Kara E.
• Assistant Examiner(s): Merlino, Amanda
• Application Number:
  US16/383,620
• Publication Number:
  US 20200026901A1
• Time in Patent Office: 912 Days
• CPC Class Codes: G06F 3/0421 by interrupting or reflecting a light beam, e.g. optical touch-screen
• 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: H05K 1/189 characterised by the use of a flexible or folded printed circuit H05K3/326 takes precedence
• CPC Class Codes: H05K 2201/10121 Optical component, e.g. opto-electronic component

Abstract

An optical fingerprint sensing module attached to a base is provided. The base includes a first surface, a second surface and an opening extending through the first surface and the second surface. The optical fingerprint sensing module includes a fixing frame and a sensor integrated circuit (IC). The fixing frame is disposed in the opening of the base. The sensor IC is disposed in a receiving groove of the fixing frame and includes a plurality of photo sensors. The photo sensors receive light reflected from a user'"'"'s finger through the opening of the base.

Claims

1. An optical fingerprint sensing module attached to a base, wherein the base comprises a first surface, a second surface and an opening extending through the first surface and the second surface, the optical fingerprint sensing module comprising:

a fixing frame disposed in the opening of the base; and

a sensor integrated circuit (IC) disposed in a receiving groove of the fixing frame, comprising a plurality of photo sensors,

wherein the photo sensors receive light reflected from a user'"'"'s finger through the opening of the base;

wherein the first surface and the second surface are an upper surface and a lower surface of the base, respectively.

2. The optical fingerprint sensing module as claimed in claim 1, wherein the receiving groove of the fixing frame is a U-shaped structure, and the receiving groove is disposed in the opening of the base.

3. The optical fingerprint sensing module as claimed in claim 1, wherein a depth of the receiving groove of the fixing frame is greater than a thickness of the base.

4. The optical fingerprint sensing module as claimed in claim 1, wherein a first plate-shaped structure and a second plate-shaped structure of the fixing frame are disposed on the first surface of the base and disposed on two opposite sides of the opening of the base.

5. The optical fingerprint sensing module as claimed in claim 4, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base through an adhesive.

6. The optical fingerprint sensing module as claimed in claim 4, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base via a screw or a positioning column.

7. The optical fingerprint sensing module as claimed in claim 4, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base through a third plate-shaped structure and a fourth plate-shaped structure of the fixing frame, wherein the first plate-shaped structure is connected and perpendicular to the third plate-shaped structure, and the second plate-shaped structure is connected and perpendicular to the fourth plate-shaped structure.

8. The optical fingerprint sensing module as claimed in claim 1, further comprising:

a flexible printed circuit board electrically connected to the sensor IC and disposed on the second surface of the base.

9. An electronic device, comprising:

a base comprising a first surface, a second surface and an opening extending through the first surface and the second surface;

an optical fingerprint sensing module, comprising;

a fixing frame disposed in the opening of the base; and

a sensing integrated circuit (IC) disposed in a receiving groove of the fixing frame, comprising a plurality of photo sensors; and

a panel module, comprising;

a cover glass; and

a light-emitting panel disposed under the cover glass and between the cover glass and the optical fingerprint sensing module, providing light to illuminate a user'"'"'s finger placed on the cover glass,

wherein the photo sensors receive light reflected from the user'"'"'s finger through the opening of the base;

wherein the first surface and the second surface are an upper surface and a lower surface of the base, respectively.

10. The electronic device as claimed in claim 9, wherein the light-emitting panel comprises a plurality of organic light-emitting diodes.

11. The electronic device as claimed in claim 9, wherein the receiving groove of the fixing frame is a U-shaped structure, and the receiving groove is disposed in the opening of the base.

12. The electronic device as claimed in claim 9, wherein depth of the receiving groove of the fixing frame is greater than thickness of the base.

13. The electronic device as claimed in claim 9, wherein in the optical fingerprint sensing module, a first plate-shaped structure and a second plate-shaped structure of the fixing frame are disposed on the first surface of the base, and the first plate-shaped structure and the second plate-shaped structure of the fixing frame are disposed on two opposite sides of the opening of the base.

14. The electronic device as claimed in claim 13, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base through an adhesive.

15. The electronic device as claimed in claim 13, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base via a screw or a positioning column.

16. The electronic device as claimed in claim 13, wherein the first plate-shaped structure and the second plate-shaped structure of the fixing frame are respectively affixed to the first surface of the base through a third plate-shaped structure and a fourth plate-shaped structure of the fixing frame, wherein the first plate-shaped structure is connected and perpendicular to the third plate-shaped structure, and the second plate-shaped structure is connected and perpendicular to the fourth plate-shaped structure.

17. The electronic device as claimed in claim 13, further comprising:

a flexible printed circuit board electrically connected to the sensor IC and disposed on the second surface of the base.