Light homogenizing device and biometric identifying device

Patent metadata

Field	Value
Publication number	US-10055636-B2
Application number	US-201715468130-A
Country	US
Kind code	B2
Filing date	Mar 24, 2017
Priority date	Jan 17, 2017
Publication date	Aug 21, 2018
Grant date	Aug 21, 2018

Abstract

The present disclosure provides a light homogenizing device and a biometric identifying device. The light homogenizing device includes a light homogenizing member and light-emitting units. The light homogenizing member includes a hole and protrusion structures. The protrusion structures are disposed on a first surface of the light homogenizing member and surrounding an outside of the hole. A circular inclined-plane is disposed between the hole and the protrusion structures and connected to the hole. The light-emitting units are disposed opposite to the first surface, and each light-emitting units transmits a light to one of the protrusion structures. The protrusion structures homogenize the light and outwardly transmit the homogenized light through a second surface of the light homogenizing member.

First claim

What is claimed is:

1. A light homogenizing device, comprising:
a light homogenizing member having a hole and a plurality of protrusion structures disposed on a first surface of the light homogenizing member and surrounding outside of the hole, wherein a circular inclined-plane is disposed between the hole and the protrusion structures, and the circular inclined-plane is connected to the hole; and
a plurality of light-emitting units disposed opposite to the first surface, each of the light-emitting units emits a light to one of the protrusion structures, and the protrusion structures homogenizes the light and outwardly transmits the homogenized light through a second surface of the light homogenizing member.

2. The light homogenizing device of claim 1 , wherein each of the protrusion structures has a curved convex surface.

3. The light homogenizing device of claim 1 , wherein the protrusion structures comprises a first protrusion structure and a second protrusion structure, and a first distance between the circular inclined-plane and the first protrusion structure is equal to a second distance between the circular inclined-plane and the second protrusion structure.

4. The light homogenizing device of claim 1 , wherein the circular inclined-plane extends from the first surface to the second surface, and a thickness of the light homogenizing member decreases along with an extension direction of the circular inclined-plane.

5. The light homogenizing device of claim 1 , wherein a plurality of positions of the light-emitting units are one-to-one corresponding to a plurality of positions of the protrusion structures.

6. A biometric identifying device, comprising:
a press sheet configured to contact with an organism;
a light homogenizing device, comprising:
a light homogenizing member having a hole and a plurality of protrusion structures disposed on a first surface of the light homogenizing member and surrounding outside of the hole, wherein a circular inclined-plane is disposed between the hole and the protrusion structures, and the circular inclined-plane is connected to the hole; and

a plurality of light-emitting units disposed opposite to the first surface, each of the light-emitting units emits a light to one of the protrusion structures, and the protrusion structures homogenizes the light and outwardly transmits the homogenized light through a second surface of the light homogenizing member to irradiate the organism through the press sheet; and
an imaging unit identifying a biometric of the organism based on the light reflected by the organism.

7. The biometric identifying device of claim 6 , wherein each of the protrusion structures has a curved convex surface.

8. The biometric identifying device of claim 6 , wherein the protrusion structures comprises a first protrusion structure and a second protrusion structure, and a first distance between the circular inclined-plane and the first protrusion structure is equal to a second distance between the circular inclined-plane and the second protrusion structure.

9. The biometric identifying device of claim 6 , wherein the circular inclined-plane extends from the first surface to the second surface, and a thickness of the light homogenizing member decreases along with an extension direction of the circular inclined-plane.

10. The biometric identifying device of claim 6 , wherein a plurality of positions of the light-emitting units are one-to-one corresponding to a plurality of positions of the protrusion structures.

11. The biometric identifying device of claim 6 , wherein the imaging unit comprises a sensor capturing an image formed by the light reflected by the organism.

12. The biometric identifying device of claim 11 , wherein the imaging unit further comprises a processor identifying the biometric of the organism based on the image.

13. The biometric identifying device of claim 6 , wherein the organism is a finger, and the biometric is a fingerprint.

Assignees

• Gingy Technology Inc

Inventors

• Hung Chun-Lang
• Wu Chien-Hsing

Classifications

• G02B5/0278

  used in transmission · CPC title

• G06K9/0004 Primary

  Physics · mapped topic

• G06K9/00087

  Physics · mapped topic

• G02B5/0205

  characterised by the diffusing properties · CPC title

• G02B19/0014 Primary

  at least one surface having optical power · CPC title