FINGERPRINT IDENTIFICATION MODULE

• US 20180025205A1
• Filed: 09/29/2017
• Published: 01/25/2018
• Est. Priority Date: 07/09/2015
• Status: Active Grant

• Current Assignee: Gingy Technology Inc.
• Original Assignee: Gingy Technology Inc.
• Inventors: Wu, Jen-Chieh, Chung, Chuck
• Granted Patent: US 10,049,257 B2
• Time in Patent Office: Days
• CPC Class Codes: G02B 6/06 the relative position of the fibres being the same at both ends, e.g. for transporting images
• CPC Class Codes: G02B 6/4203 Optical features
• CPC Class Codes: G06V 40/1324 by using geometrical optics, e.g. using prisms G06V40/1312 takes precedence

Abstract

A fingerprint identification module includes a cover plate, a fingerprint identification sensor, at least one light source, a plurality of fibers, and a display device. The cover plate has an inner surface and an outer surface opposite to the inner surface. The fingerprint identification sensor and the at least one light source are located under the inner surface, and the at least one light source is located adjacent to the fingerprint identification sensor. The fibers are arranged in an array and are located between the cover plate and the fingerprint identification sensor. Each of the fibers has a light incident surface facing the inner surface and inclined relative to the inner surface. An optical axis of each of the fibers is perpendicular to the inner surface of the cover plate. The display device is located between the cover plate and the plurality of fibers.

Claims

1. A fingerprint identification module, comprising:

a cover plate, having an inner surface and an outer surface opposite to the inner surface;

a fingerprint identification sensor, located under the inner surface;

at least one light source, located under the inner surface and adjacent to the fingerprint identification sensor;

a plurality of fibers, arranged in an array and located between the cover plate and the fingerprint identification sensor, wherein each of the fibers has a light incident surface, and the light incident surface faces the inner surface of the cover plate and is inclined relative to the inner surface of the cover plate, wherein an optical axis of each of the fibers is perpendicular to the inner surface of the cover plate; and

a display device, located between the cover plate and the plurality of fibers.

2. The fingerprint identification module as claimed in claim 1, wherein the display device is an organic light emitting diode display device, and the fingerprint identification module further comprises:

a bandpass filter layer, located between the display device and the fingerprint identification sensor.

3. The fingerprint identification module as claimed in claim 2, wherein the bandpass filter layer allows a light beam having a wavelength within a range between 800 nm and 940 nm to pass through and filters a light beam having a wavelength outside the range between 800 nm and 940 nm.

4. The fingerprint identification module as claimed in claim 1, wherein the fingerprint identification sensor is an optical fingerprint identification sensor or an optical electrical fingerprint identification sensor.

5. The fingerprint identification module as claimed in claim 1, wherein the at least one light source is a plurality of light sources, and the light sources are respectively disposed on each side, each corner, or a combination of each side and each corner of the array.

6. The fingerprint identification module as claimed in claim 1, wherein an extension direction of each fiber is perpendicular to the fingerprint identification sensor.

7. The fingerprint identification module as claimed in claim 1, wherein an angle is between each light incident surface and the inner surface, and the angle is within a range of 43 degrees to 60 degrees.

8. The fingerprint identification module as claimed in claim 1, wherein each of the fibers includes a core and a core casing surrounding the core, wherein a refractive index of the core is greater than 1.81, and a refractive index of the core casing is greater than 1 and less than or equal to 1.48.

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

a first adhesive layer and a second adhesive layer, wherein the fibers are connected to the cover plate through the first adhesive layer, and the fibers are connected to the fingerprint identification sensor through the second adhesive layer.

10. The fingerprint identification module as claimed in claim 8, wherein the first adhesive layer and the second adhesive layer are light cured adhesive layers.