WO2019007304A1

WO2019007304A1 - Infrared light source, iris recognition module, and mobile terminal

Info

Publication number: WO2019007304A1
Application number: PCT/CN2018/094010
Authority: WO
Inventors: 周意保
Original assignee: Oppo广东移动通信有限公司
Priority date: 2017-07-07
Filing date: 2018-07-02
Publication date: 2019-01-10
Also published as: CN107437065A; CN107437065B

Abstract

Disclosed in the present invention are an infrared light source (100), an iris recognition module (1000), and a mobile terminal. The infrared light source (100) comprises: a substrate (10), multiple infrared light source wafer chips (20), and a package (30). The multiple infrared light source wafer chips (20) are disposed on the substrate (10), and at least two of the infrared light source wafer chips (20) have different operating wavelengths. The package (30) is configured to package the infrared light source wafer chips (20) on the substrate (30).

Description

Infrared light source, iris recognition module and mobile terminal

Cross-reference to related applications

The present application claims priority to and the benefit of the patent application No. PCT Application No.

Technical field

The present invention relates to the field of electronic devices, and in particular, to an infrared light source, an iris recognition module, and a mobile terminal.

Background technique

Iris recognition generally requires an infrared source to assist in obtaining a clear iris image. However, the iris color of different people is different, and the wavelength of the applicable infrared light source is different. The infrared light source using a single wavelength is less suitable.

Summary of the invention

Embodiments of the present invention provide an infrared light source, an iris recognition module, and a mobile terminal.

The infrared light source of the embodiment of the invention is used for iris recognition, and the infrared light source comprises:

Substrate

a plurality of infrared light source wafer chips disposed on the substrate, at least two of the infrared light source wafer chips having different operating wavelengths; and

The infrared light source wafer chip is packaged on a package on the substrate.

In some embodiments, the substrate is annular, the plurality of infrared light source wafer chips are distributed along a circumferential direction of the substrate, and the package is in a ring shape corresponding to the substrate to enable the infrared The light source is annular.

In certain embodiments, the substrate is in the form of a circular or rectangular ring.

In some embodiments, the infrared source wafer chip comprises an infrared LED wafer chip.

In some embodiments, each of the infrared light source wafer chips has an operating wavelength of 780 nm, 850 nm, or 940 nm.

In some embodiments, the number of the infrared source wafer chips per each of the operating wavelengths comprises a plurality.

In some embodiments, the infrared source further includes a drive element for selectively driving at least one of the infrared source wafer chip illumination.

In some embodiments, the drive element includes a switch that connects each of the infrared source wafer chips to a corresponding drive source and a control circuit that controls the switch to communicate and shut down.

An iris recognition module according to an embodiment of the present invention includes an infrared light source as described above and an infrared camera for receiving reflected light of the infrared light emitted by the infrared light source in the iris to form an iris image.

In some embodiments, the substrate is annular, the plurality of infrared light source wafer chips are distributed along a circumferential direction of the substrate, and the package is in a ring shape corresponding to the substrate to enable the infrared The light source is annular, and the infrared camera is disposed inside the infrared light source.

The mobile terminal according to the embodiment of the present invention includes the above-described iris recognition module.

In some embodiments, the mobile terminal comprises a cell phone or a tablet.

The infrared light source, the iris recognition module and the mobile terminal of the embodiment of the invention can be applied to different users of different iris color differences by setting a plurality of wafers with different working wavelengths in the infrared light source, and can even be applied to different scenes in different regions and Different setting requirements increase the applicability of the infrared light source and improve the efficiency of iris recognition.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

The above and/or additional aspects and advantages of the present invention will become apparent and readily understood from

1 is a schematic structural view of an infrared light source according to an embodiment of the present invention.

2 is a schematic structural view of an infrared light source according to some embodiments of the present invention.

3 is a schematic structural view of an infrared light source according to some embodiments of the present invention.

4 is a schematic structural diagram of a mobile terminal according to some embodiments of the present invention.

Detailed ways

The embodiments of the present invention are described in detail below, and the examples of the embodiments are illustrated in the drawings, wherein the same or similar reference numerals are used to refer to the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " Orientations of "post", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. The positional relationship is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the present invention and the simplified description, and is not intended to indicate or imply that the device or component referred to has a specific orientation, and is constructed and operated in a specific orientation. Therefore, it should not be construed as limiting the invention. Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include one or more of the described features either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is two or more unless specifically and specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "installation", "connected", and "connected" are to be understood broadly, and may be fixed or detachable, for example, unless otherwise explicitly defined and defined. Connected, or integrally connected; may be mechanically connected, may be electrically connected or may communicate with each other; may be directly connected, or may be indirectly connected through an intermediate medium, may be internal communication of two elements or interaction of two elements relationship. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the present invention, the first feature "on" or "under" the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them. Moreover, the first feature "above", "above" and "above" the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature. The first feature "below", "below" and "below" the second feature includes the first feature directly below and below the second feature, or merely the first feature level being less than the second feature.

The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and arrangements of the specific examples are described below. Of course, they are merely examples and are not intended to limit the invention. In addition, the present invention may be repeated with reference to the numerals and/or reference numerals in the various examples, which are for the purpose of simplicity and clarity, and do not indicate the relationship between the various embodiments and/or arrangements discussed. Moreover, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the use of other processes and/or the use of other materials.

Referring to FIG. 1 to FIG. 4 , the infrared light source 100 of the embodiment of the present invention is used for the iris recognition module 1000 , and the iris recognition module 1000 includes an infrared light source 100 and an infrared camera 200 . The infrared camera 200 is configured to receive reflected light of the infrared light emitted by the infrared light source 100 as an effective light source in the iris to form an iris image. The infrared light source 100 includes a substrate 10, an infrared light source wafer chip 20, and a package body 30.

The infrared light source wafer chip 20 includes a plurality of, and at least two infrared light source wafer chips have different working wavelengths, and the package body 30 is used for packaging the infrared light source wafer chip 20 on the basic 10 .

With the increasing importance of information security, more and more consumer mobile terminals encrypt information to protect the user's personal information security, and obtain the corresponding information and operation authority through the corresponding verification method. The authentication method usually includes a character pattern password such as a character password or a pattern password. However, such a password is usually easy to crack, thereby invalidating the encryption. In addition, some mobile terminals, such as mobile phones and tablet computers, also provide fingerprints as an encryption method. Users use fingerprint recognition for verification. Although fingerprints have strong differences, they are easily stolen by others and made into fake fingerprints such as fingerprints. It is also not conducive to the security of information. In this case, iris recognition technology has begun to be adopted by some mobile terminals as a more secure verification method.

Iris recognition is to determine the identity of the user by comparing the similarities between the features of the iris image. The iris information is unique and difficult to copy and has high security.

Iris recognition generally requires a process of iris image acquisition, iris image processing, and iris image recognition.

In the process of iris image acquisition, it needs to be collected by a special iris recognition module. Generally, the iris recognition module includes a camera and a light source. In order to protect the human eye and obtain a rich iris image, the light source selects infrared light. Accordingly, the camera selects an infrared camera.

The color of the iris that is not used by people is usually different. For example, the iris color of European and American white people is usually blue-green, while the iris color of Asian yellow people is usually black. The irises of different colors have different response efficiencies and effects at the same working wavelength. For example, for the cyan iris, the iris image can be obtained by using visible light of 700 nm wavelength, but for the black iris, it cannot be imaged.

It can be understood that when only the infrared light source of a single working wavelength is set in the iris recognition module, it is usually a compromise selection, which is not the best choice for an iris of a specific color.

The infrared light source 100 of the embodiment of the present invention includes a plurality of infrared light source wafer chips 20, and at least two infrared light source wafer chips 20 have different working wavelengths. Thus, the color of the iris can be selected according to the actual situation of the user's iris. The matched optimal operating wavelength of the infrared source wafer chip 20 emits infrared light to obtain a better iris image.

The substrate 10 is used to provide support for the infrared light source 100. The infrared light source wafer chip 20 is disposed on the substrate 10 in a predetermined manner. It can be understood that the wafer determines the operating wavelength of the infrared source. The infrared light source wafer chip 20 disposed on the substrate 10 provides at least two different operating wavelengths. Of course, the infrared light source wafer chip 20 of two or more working wavelengths can be provided according to actual needs, which is not limited herein. In this way, the needs of different users' iris characteristics can be met. For example, in some examples, the operating wavelengths of the infrared source wafer chip 20 include 780 nm, 850 nm, and 940 nm. Among them, the infrared light with a working wavelength of 780 nm is better for the blue-green iris in the iris recognition process. The 850 nm infrared light is better for the iris recognition process in the iris recognition process. The 940nm infrared light is effective in providing effective light source for iris imaging without being visible to the human eye, and the user experience is better. The working state of the wafers of various working wavelengths is also turned on or off. According to the specific conditions of the user or the use environment during the actual use, the user can select or set the selective opening by the mobile terminal control.

The package body 30 may be a material such as a colloid or a resin, and the upper surface thereof is flush with the upper surface of the wafer. The package body 30 further includes a transparent cover plate covering the upper surface of the wafer to serve as an emission window for infrared light, and the cover plate may be generally used. Plastic, glass and other materials with good transmission properties, can also use a lens that can scatter infrared light, thereby increasing the working range of infrared light.

The infrared light source wafer chip 20 is encapsulated by the package body 30 to form an infrared light source 100. The infrared light source 100 can be connected to the main board of the mobile terminal through a board-to-board connector, and is powered by the main power source of the mobile terminal. The plurality of infrared light source wafer chips 20 are collectively packaged in the same package 30, that is, the infrared light source 100 is a single module light source. The optical axes of the plurality of infrared light source wafer chips 20 may be parallel to the optical axis of the infrared camera 200 or may be at an angle to the optical axis of the infrared camera 200.

The iris recognition module 1000 is generally used to identify the identity of the user currently using the mobile terminal. Therefore, the iris recognition module 1000 is generally pre-positioned, that is, disposed on the front panel of the mobile terminal, for example, at the top of the front panel.

In summary, the infrared light source 100 and the iris recognition module 1000 of the embodiment of the present invention can be applied to different users of different iris color differences by providing a plurality of wafers having different working wavelengths in the infrared light source 100, and can even be applied to Different scenes and different setting requirements in different regions have increased the applicability of the infrared light source 100, and secondly, improved the efficiency of iris recognition.

In some embodiments, the mobile terminal includes a mobile phone, a tablet, a smart wearable device, and the like. In addition, the iris recognition module 1000 can also be used for devices such as smart home devices and consumer-grade drones, and is not limited herein.

In some embodiments, the substrate 10 is annular, and the plurality of infrared light source wafer chips 20 are distributed along the circumferential direction of the substrate 10, and the package 30 has an annular shape corresponding to the substrate 10 to make the infrared light source 100 annular.

In such an embodiment, the infrared camera 200 is disposed inside the infrared source 100.

Specifically, the substrate 10 may have a ring shape or a rectangular ring shape. Generally, for the safety of the user, the power of the infrared light source 100 is limited to a certain extent, so the effective working distance of the wafer is usually 10-30 cm, and the infrared camera 200 can obtain the iris image more clearly within the effective working range. . When the infrared camera 200 is located inside the infrared light source 100, the distance from each of the plurality of infrared light source wafer chips 20 distributed in a ring shape to the sensors of the infrared camera 200 is substantially the same, and the working distances of the respective wafers are also substantially the same.

The rectangular ring is easy to manufacture but only allows a limited number of wafers to be substantially the same distance from the sensors of the infrared camera 200. The working distances of different wafers may be different. Therefore, in operation, the infrared light source wafer chip 20 at different working wavelengths is activated. The user may adjust the working distance as appropriate.

The package body 30 corresponds to the shape of the substrate 10, that is, in an annular or ring-shaped structure, so that the structure is compact and the position of the infrared camera 200 can be reserved.

In some embodiments, the infrared source wafer chip 20 includes an infrared LED wafer.

LED wafers have better thermal, electrical, optical and mechanical properties, are easy to manufacture, and are inexpensive.

A plurality of infrared LED wafers are packaged by the package 30 to form an LED infrared light source component, or an LED infrared light package includes a plurality of infrared LED wafers instead of multiple LED infrared light source components or multiple LED infrared light packages. .

In some embodiments, the number of infrared light source wafer chips 20 per operating wavelength includes a plurality.

Specifically, the number of the infrared light source wafer chips 20 corresponding to one working wavelength includes a plurality of, so that one or more wafers of the same working wavelength can be turned on according to relevant conditions such as the use environment to provide different infrared light intensities. For example, when the ambient light environment is relatively strong, multiple wafers can be turned on to increase the emission intensity, so that the infrared camera 200 can obtain a clear iris image, but the power consumption of turning on multiple wafers is high, and the heat generation of the components is also large. Therefore, it is only necessary to turn on one wafer operation when the conditions such as the light environment are good.

In some embodiments, the number of infrared source wafer chips per operating wavelength is the same or different.

Specifically, when the working wavelength is short, for example, 780 nm, the blue-green iris effect is better, and for the blue-green iris, the visible light supplement light can also be an effective light source, even using longer wavelength infrared light. It can be an effective light source, and a black iris corresponding to a longer wavelength, for example, 850 nm, can only image the iris at the current wavelength or longer, and is susceptible to the environment. Therefore, the longer the wavelength of the infrared wafer is set, the more the infrared light source wafer chip 20 can be opened to meet the different working conditions, and the multi-level power consumption can be satisfied.

In some embodiments, the infrared source 100 further includes a drive element for selectively driving at least one infrared source wafer chip illumination.

In such an embodiment, the drive element includes a switch and a control circuit, wherein the switch is used to connect each of the infrared source wafer chips 20 with a corresponding drive source for controlling the switch to communicate and close.

It can be understood that the operating wavelengths of the plurality of infrared light source wafer chips 20 are different, and part of the wafers are selected to emit infrared light according to user selection or use, and the corresponding wafer and the driving source are controlled to be turned on and off by controlling the switching of the switches. Control of the wafer is possible.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example", or "some examples", etc. The specific features, structures, materials or characteristics described in the embodiments or examples are included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms does not necessarily mean the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

While the embodiments of the present invention have been shown and described, the embodiments of the invention may The scope of the invention is defined by the claims and their equivalents.

Claims

An infrared light source for iris recognition, characterized in that the infrared light source comprises:

Substrate

a plurality of infrared light source wafer chips disposed on the substrate, at least two of the infrared light source wafer chips having different operating wavelengths; and

The infrared light source wafer chip is packaged on a package on the substrate.
The infrared light source according to claim 1, wherein the substrate is annular, the plurality of infrared light source wafer chips are distributed along a circumferential direction of the substrate, and the package body corresponds to the substrate The ring shape is such that the infrared light source is annular.
The infrared light source according to claim 2, wherein said substrate has a circular or rectangular ring shape.
The infrared light source of claim 1 wherein said infrared source wafer chip comprises an infrared LED wafer chip.
The infrared light source of claim 1 wherein each of said infrared source wafer chips has an operating wavelength of 780 nm, 850 nm or 940 nm.
The infrared light source of claim 1 wherein the number of said infrared source wafer chips per operating wavelength comprises a plurality.
The infrared light source of claim 1 wherein said infrared source further comprises a drive element for selectively driving at least one of said infrared source wafer chip illumination.
The infrared light source of claim 7 wherein said drive element comprises a switch connecting each of said infrared source wafer chips to a corresponding drive source and a control circuit for controlling said switch to communicate and deactivate.
An iris recognition module, wherein the iris recognition module comprises:

An infrared light source, the infrared light source comprising: a substrate, a plurality of infrared light source wafer chips and a package;

The plurality of infrared light source wafer chips are disposed on the substrate, and at least two of the infrared light source wafer chips have different operating wavelengths; and

a package for encapsulating the infrared light source wafer chip on the substrate; and

The infrared camera is configured to receive the reflected light of the infrared light emitted by the infrared light source in the iris to form an iris image.
The iris recognition module according to claim 9, wherein the substrate is annular, the plurality of infrared light source wafer chips are distributed along a circumferential direction of the substrate, and the package is formed with the substrate A corresponding ring shape is used to make the infrared light source annular, and the infrared camera is disposed inside the infrared light source.
The iris recognition module according to claim 10, wherein the substrate has a circular or rectangular ring shape.
The iris recognition module of claim 9, wherein the infrared light source wafer chip comprises an infrared LED wafer chip.
The iris recognition module according to claim 9, wherein each of said infrared light source wafer chips has an operating wavelength of 780 nm, 850 nm or 940 nm.
The iris recognition module of claim 9, wherein the number of the infrared light source wafer chips of each of the working wavelengths comprises a plurality.
The iris recognition module of claim 9 wherein said infrared source further comprises a drive element for selectively driving at least one of said infrared source wafer chip illumination.
The iris recognition module according to claim 15, wherein said driving element comprises a switch connecting each of said infrared light source wafer chips and a corresponding driving source, and a control circuit for controlling said switch to communicate and close .
A mobile terminal, comprising:

An iris recognition module, the iris recognition module includes: an infrared light source, the infrared light source includes: a substrate, a plurality of infrared light source wafer chips, and a package;

The plurality of infrared light source wafer chips are disposed on the substrate, and at least two of the infrared light source wafer chips have different operating wavelengths; and

a package for encapsulating the infrared light source wafer chip on the substrate; and

The infrared camera is configured to receive the reflected light of the infrared light emitted by the infrared light source in the iris to form an iris image.
The mobile terminal of claim 17, wherein the mobile terminal comprises a mobile phone or a tablet.