Iris recognition device, manufacturing method therefor and application thereof

Patent metadata

Field	Value
Publication number	US-10169651-B2
Application number	US-201515313083-A
Country	US
Kind code	B2
Filing date	May 20, 2015
Priority date	May 22, 2014
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

The iris recognition device includes an iris camera module used for collecting iris characteristics of a user, and at least one fill light component used for providing a supplementary light source for the iris camera module. When the iris recognition device is used for collecting the iris characteristics of the user, the supplementary light source provided by the fill light component reduces reflective spots on the iris or make reflective spots in areas other than iris such as sclera and pupil, thereby improving precision of the collected iris characteristics of the user.

First claim

What is claimed is:

1. A fill light method of an iris recognition application by an iris recognition device which comprises:
an iris camera module, and
at least one fill light component provided on said iris camera module, wherein said at least one fill light component comprises at least one light emitting element,
wherein the fill light method comprises the steps of:
(a) collecting user iris characteristics of a user by capturing an iris region of said user by said iris camera module and using at least a pupil of said user as an focal point by said iris camera module, wherein the step (a) further comprises the steps of:
(a.1) defining a first face region covered by said iris camera module as an interior region of said user and a pupil region inside said interior region, said focal point and said iris region being located in said pupil region;
(a.2) defining a second face region covered by said at least one fill light component as an exterior region outside of said first face region of said user; and
(a.3) shooting said iris region of said user by said iris camera module to collect said user iris characteristics of said user while said fill light component providing a supplementary light source for said iris camera module; and
(b) providing said supplementary light source for an eye region of said user by said at least one light emitting element of said at least one fill light component to form a uniform brightness on said iris region of said user, wherein a light emitting angle of said at least one light emitting element is greater than a horizontal field angle and a vertical field angle of said iris camera module so as to ensure said fill light component and said iris camera module simultaneously acting on said iris region, wherein a distance of said iris recognition device and an iris of said user is defined as z, a distance between axles of said iris camera module and said at least one light emitting element of said at least one fill light component is defined as x, and an inclination angle of said at least one light emitting element is defined as θ, wherein a formulas relationship of said values of z, x and θ is tan θ=z/x, wherein when z is in a determinate state, x and θ have a changing rule of tangent function, wherein said value of x is determined by adjusting said value of θ and said value of θ is determined by adjusting said value of x.

2. A manufacturing method for an iris recognition device adapted for collecting user iris characteristics of a user, comprising the steps of:
(A) mounting an iris camera module on a printed circuit board adapted to shoot an iris region of said user to collect said user iris characteristics of said user by capturing said iris region located in a pupil region of said user; and
(B) providing at least one fill light component positioned with respect to said iris camera module, wherein said fill light component comprises at least one light emitting element to provide a supplementary light source for an eye region of said user to form a uniform brightness on said iris region of said user when said iris camera module is collecting said user iris characteristics of said user, wherein a light-emitting angle of said at least one light emitting element is greater than a horizontal field angle and a vertical filed angle of said iris camera module to ensure said fill light component and said iris camera module simultaneously acting on said iris region, wherein a distance of said iris recognition device and an iris of said user is defined as z, a distance between axles of said iris camera module and said at least one light emitting element of said at least one fill light component is defined as x, and an inclination angle of said at least one light emitting element is defined as θ, wherein a formulas relationship of said values of z, x and θ is tan θ=z/x, wherein when z is in a determinate state, x and θ have a changing rule of tangent function, wherein said value of x is determined by adjusting said value of θ and said value of θ is determined by adjusting said value of x.

3. The manufacturing method, as recited in claim 2 , further comprising a step of providing a human face camera module and mount said human face camera module on said printed circuit board, wherein a horizontal field angle of said human face camera module is greater than a horizontal field angle of said iris camera module and a vertical field angle of said human face camera module is greater than a vertical field angle of said iris camera module.

4. An iris recognition device, comprising:
an iris camera module mounted on a printed circuit board and arranged to shoot an iris region of a user to collect user iris characteristics of said user by capturing said iris region located in a pupil region of said user,
at least one fill light component comprising at least one light emitting element to provide a supplementary light source for an eye region of said user to form a uniform brightness on said iris region of said user when said iris camera module is collecting said user iris characteristics of said user, wherein said fill light component is positioned with respect to said iris camera module that a light-emitting angle of said at least one light emitting element is greater than a horizontal field angle and a vertical filed angle of said iris camera module to ensure said fill light component and said iris camera module simultaneously acting on said iris region; and
a human face camera module mounted on said printed circuit board, wherein a horizontal field angle of said human face camera module is greater than a horizontal field angle of said iris camera module and a vertical field angle of said human face camera module is greater than a vertical field angle of said iris camera module.

5. An iris recognition device, comprising:
an iris camera module mounted on a printed circuit board and arranged to shoot an iris region of a user to collect user iris characteristics of said user by capturing said iris region located in a pupil region of said user,
at least one fill light component comprising at least one light emitting element to provide a supplementary light source for an eye region of said user to form a uniform brightness on said iris region of said user when said iris camera module is collecting said user iris characteristics of said user, wherein said fill light component is positioned with respect to said iris camera module that a light-emitting angle of said at least one light emitting element is greater than a horizontal field angle and a vertical filed angle of said iris camera module to ensure said fill light component and said iris camera module simultaneously acting on said iris region, wherein a distance of said iris recognition device and an iris of said user is defined as z, a distance between axles of said iris camera module and said at least one light emitting element of said at least one fill light component is defined as x, and an inclination angle of said at least one light emitting element is defined as θ, wherein a formulas relationship of said values of z, x and θ is tan θ=z/x, wherein when z is in a determinate state, x and θ have a changing rule of tangent function, wherein said value of x is determined by adjusting said value of θ and said value of θ is determined by adjusting said value of x.

Assignees

• Ningbo Sunny Opotech Co Ltd

Inventors

• Gu Yiwu
• Luo Mengjie
• Tang Xinke
• Xu Jiewei
• Xu Shixin
• Huang Lin

Classifications

• G02B13/18 Primary

  with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration {(G02B13/002 takes precedence)} · CPC title

• G06V40/197

  Matching; Classification · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title

• H04N23/56

  provided with illuminating means · CPC title

• G06V10/147

  Details of sensors, e.g. sensor lenses (fingerprint or palmprint sensors G06V40/13; vascular sensors G06V40/145; eye sensors G06V40/19) · CPC title