CN107451541B - Filter coating, iris recognition module and electronic device - Google Patents
Filter coating, iris recognition module and electronic device Download PDFInfo
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- CN107451541B CN107451541B CN201710575125.0A CN201710575125A CN107451541B CN 107451541 B CN107451541 B CN 107451541B CN 201710575125 A CN201710575125 A CN 201710575125A CN 107451541 B CN107451541 B CN 107451541B
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- infrared light
- light source
- filter
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- iris recognition
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/18—Eye characteristics, e.g. of the iris
- G06V40/19—Sensors therefor
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- Ophthalmology & Optometry (AREA)
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Abstract
The invention discloses a light filtering film, an iris recognition module and an electronic device. The filter film is used for enabling infrared light in at least two specific wavelength ranges to pass through and filtering electromagnetic waves except the at least two specific wavelength ranges when the electromagnetic waves pass through the filter film. The filter film provided by the embodiment of the invention can enable infrared light in various specific wavelength ranges to pass through, and during iris recognition, the infrared light in various wavelengths can meet the requirements of irises with different colors.
Description
Technical Field
The invention relates to the technical field of iris recognition, in particular to a filter film, an iris recognition module and an electronic device.
Background
The existing infrared filter can only allow infrared light with the wavelength of about 810nm to pass through, when the infrared filter is used for iris recognition, the recognition effect is better when the infrared filter is applied to blue-green irises of European and American people, and the effect is poor when the infrared filter is applied to black irises of Asian.
Disclosure of Invention
The embodiment of the invention provides a filter film, an iris recognition module and an electronic device.
The filter film is used for an iris identification module, and is used for enabling infrared light in at least two specific wavelength ranges to pass through and filtering electromagnetic waves except the at least two specific wavelength ranges when the electromagnetic waves pass through the filter film.
The filter film provided by the embodiment of the invention can enable infrared light in various specific wavelength ranges to pass through, and during iris recognition, the infrared light in various wavelengths can meet the requirements of irises with different colors.
In some embodiments, the filter is configured to pass infrared light having a wavelength greater than or equal to 790nm and less than or equal to 830nm, infrared light having a wavelength greater than or equal to 830nm and less than or equal to 870nm, and/or infrared light having a wavelength greater than or equal to 920nm and less than or equal to 960nm when electromagnetic waves pass through the filter.
An iris recognition module according to an embodiment of the present invention includes:
an infrared light source for emitting infrared light; and
a filter disposed in an optical path of the infrared light source and according to any of the above embodiments.
According to the iris identification module, the filter film can enable infrared light in various specific wavelength ranges to pass through, and the infrared light with various wavelengths can meet the requirements of irises with different colors during iris identification.
In some embodiments, the infrared light source comprises an LED lamp.
An electronic device according to an embodiment of the present invention includes:
a housing formed with an emission window; and
in the iris identification module of the above embodiment, the infrared light source is disposed in the housing and emits the infrared light through the emission window;
the filter film is arranged on the emission window.
According to the electronic device provided by the embodiment of the invention, the filter film can enable infrared light in various specific wavelength ranges to pass through, and the infrared light with various wavelengths can meet the requirements of irises with different colors during iris recognition.
In some embodiments, the housing further forms a collection window, the iris recognition module includes an infrared camera disposed in the housing and exposed from the collection window, and the filter is disposed on the collection window.
In some embodiments, the housing includes a casing and a cover plate disposed on the casing, the filter film is formed on the cover plate, and an orthographic projection of the filter film in a direction of the infrared light source covers the infrared light source.
In some embodiments, the filter film is formed on a lower surface of the cover plate and is disposed between the cover plate and the infrared light source.
In some embodiments, the filter film is formed on the cover plate by electroplating.
In some embodiments, the electronic device further comprises a motherboard, and the infrared light source is disposed on the motherboard.
Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic plan view of an electronic device according to an embodiment of the invention;
FIG. 2 is a graph of wavelength versus transmittance of electromagnetic waves through a filter according to an embodiment of the present invention;
FIG. 3 is a graph of wavelength versus transmittance of electromagnetic waves through a filter according to another embodiment of the present invention;
FIG. 4 is a graph of wavelength versus transmittance of electromagnetic waves through a filter according to yet another embodiment of the present invention;
fig. 5 is a wavelength-transmittance graph of an electromagnetic wave passing through a filter according to still another embodiment of the present invention.
Description of the main element symbols:
the infrared camera comprises an electronic device 1000, an iris recognition module 100, a filter film 10, an infrared light source 20, an infrared camera 30, a shell 200, an emission window 220, a collection window 240, a shell 260, a cover plate 280 and a mainboard 300.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 and 3, a filter 10 according to an embodiment of the present invention is used in an iris recognition module 100, and the filter 10 is used for passing infrared light in at least two specific wavelength ranges and filtering electromagnetic waves except the at least two specific wavelength ranges when the electromagnetic waves pass through the filter 10.
The filter film 10 of the embodiment of the invention can allow infrared light in various specific wavelength ranges to pass through, and the infrared light in various wavelengths can meet the requirements of irises with different colors during iris recognition.
The infrared camera 30 of the iris identification module 100 receives infrared light, and the common filter only allows infrared light of one wavelength to pass through, but the iris colors of different people are different, and the response efficiency and effect of the irises of different colors to the same working wavelength are different. Therefore, in iris recognition, infrared light of different wavelengths needs to be used in cooperation with irises of different colors.
In some embodiments, the filter 10 is configured to pass infrared light having a wavelength greater than or equal to 790nm and less than or equal to 830nm, infrared light having a wavelength greater than or equal to 830nm and less than or equal to 870nm, and/or infrared light having a wavelength greater than or equal to 920nm and less than or equal to 960nm when electromagnetic waves pass through the filter 10.
In this way, infrared light in multiple wavelength ranges is passed to facilitate iris recognition of different colored irises.
It is understood that the infrared light in the specific wavelength range may be infrared light having a wavelength of 790nm or more and 830nm or less, infrared light having a wavelength of 830nm or more and 870nm or less, infrared light having a wavelength of 920nm or more and 960nm or less.
Specifically, referring to fig. 2, when the electromagnetic waves pass through the filter 10, the filter 10 can pass the infrared light with the wavelength greater than or equal to 790nm and less than or equal to 830nm and the infrared light with the wavelength greater than or equal to 830nm and less than or equal to 870nm, and filter out the electromagnetic waves with the wavelength less than 790nm and the wavelength greater than 870 nm. Referring to fig. 3, or when the electromagnetic waves pass through the filter film 10, the filter film 10 can pass the infrared light with the wavelength greater than or equal to 830nm and less than or equal to 870nm and the infrared light with the wavelength greater than or equal to 920nm and less than or equal to 960nm, and filter out the electromagnetic waves with the wavelength less than 830nm, the wavelength greater than 870nm and less than 920nm and the wavelength greater than 960 nm. Referring to fig. 4, or when the electromagnetic waves pass through the filter film 10, the filter film 10 can pass the infrared light with the wavelength greater than or equal to 790nm and less than or equal to 830nm and the infrared light with the wavelength greater than or equal to 920nm and less than or equal to 960nm, and filter out the electromagnetic waves with the wavelength less than 790nm, the wavelength greater than 830nm and less than 920nm, and the wavelength greater than 960 nm. Referring to fig. 5, or when the electromagnetic wave passes through the filter film 10, the infrared light with a wavelength greater than or equal to 790nm and less than or equal to 830nm, the infrared light with a wavelength greater than or equal to 830nm and less than or equal to 870nm, and the infrared light with a wavelength greater than or equal to 920nm and less than or equal to 960nm pass through, and the electromagnetic wave with a wavelength less than 790nm, a wavelength greater than 870nm and less than 920nm, and a wavelength greater than 960nm is filtered.
Of course, the specific wavelength range is not limited to the above wavelength range, and may be in other ranges in other embodiments.
Referring to fig. 1, an iris identification module 100 according to an embodiment of the present invention includes an infrared light source 20 and a filter 10 according to any one of the above embodiments. The infrared light source 20 is for emitting infrared light; the filter film 10 is disposed on the optical path of the infrared light source 20.
In the iris recognition module 100 according to the embodiment of the present invention, the filter film 10 can allow infrared light within a plurality of specific wavelength ranges to pass through, and the infrared light with a plurality of wavelengths can satisfy the requirements of irises with different colors during iris recognition.
In some embodiments, the infrared light source 20 comprises an LED lamp.
Therefore, the LED lamp is low in power and heat productivity, the power consumption is low when the infrared light source 20 works, the generated heat is small, and the influence on other surrounding components is small.
Of course, the infrared light source 20 is not limited to an LED lamp, and in other embodiments, other components may be used as the infrared light source 20.
Referring to fig. 1, an electronic device 1000 according to an embodiment of the invention includes a housing 200 and an iris recognition module 100 according to the above embodiment. The housing 200 is formed with an emission window 220. The infrared light source 20 is disposed inside the housing 200 and emits infrared light through the emission window 220. The filter film 10 is disposed on the emission window 220.
In the electronic device 1000 according to the embodiment of the invention, the filter film 10 can allow infrared light in a plurality of specific wavelength ranges to pass through, and the infrared light in a plurality of wavelengths can meet the requirements of irises with different colors during iris recognition.
The electronic device 1000 includes, but is not limited to, a cell phone, a tablet computer, a smart watch, and the like.
In some embodiments, the housing 200 further forms a collection window 240, the iris recognition module 100 includes an infrared camera 30 disposed in the housing 200 and exposed from the collection window 240, and the filter film 10 is disposed on the collection window 240.
In this way, when the infrared camera 30 collects the iris image, the filter film 10 allows infrared light in a plurality of specific wavelength ranges to pass through, which helps the infrared camera 30 clearly collect iris images of irises of different colors.
The iris recognition module 100 determines the user identity by comparing the similarity between features of iris images, and generally requires processes of iris image acquisition, iris image processing, and iris image recognition. And comparing the acquired iris image with a prestored iris image, and if the comparison result is consistent, the verification is passed. In order to acquire a clear iris image, a special infrared camera 30 and an infrared light source 20 are required to be matched for acquisition in the process of acquiring the iris image.
Specifically, the fill light range of the infrared light source 20 covers the field of view of the infrared camera 30. Therefore, the light supplement effect of the infrared light source 20 is good, and the infrared camera 30 can further collect clearer iris images.
Further, the infrared light source 20 is disposed apart from the infrared camera 30. In this way, the influence of heat generated by the infrared light source 20 during operation on the infrared camera 30 can be reduced.
In some embodiments, the housing 200 includes a casing 260 and a cover 280 disposed on the casing 260, wherein the filter 10 is formed on the cover 280, and the orthographic projection of the filter 10 toward the infrared light source 20 covers the infrared light source 20.
In this way, the filter film 10 is disposed on the cover 280, and the infrared light source 20 is disposed in the housing 260, so that the iris recognition module 100 is preferably mounted on the housing 260.
It is understood that when the orthographic projection of the filter film 10 toward the infrared light source 20 covers the infrared light source 20, the optical path of the infrared light emitted from the infrared light source 20 passes through the filter film 10.
Specifically, the cover 280 includes light transmissive regions, and in one example, the light transmissive regions of the cover 280 form the emission window 220 and the collection window 240. The light-transmitting region may be a solid light-transmitting region or a through hole formed in the cover plate 280. In this way, the infrared light emitted by the infrared light source 20 can penetrate through the light-transmitting area of the cover 280 from the emission window 220 to the outside of the electronic device 1000, and the light outside the electronic device 1000 can also penetrate through the light-transmitting area of the cover 280 from the collection window 240 to enter the inside of the electronic device 1000 to be collected by the infrared camera 30.
In some embodiments, the filter film 10 is formed on the lower surface of the cover 280, and is disposed between the cover 280 and the infrared light source 20.
Thus, the upper surface of the cover 280 is smooth, and the electronic device 1000 is more beautiful.
Specifically, the cover 280 is disposed on the case 260, and the case 260 and the cover 280 form the housing 200 of the electronic device 1000. The upper surface of the cap plate 280 is exposed to the outside of the electronic device 1000, and the lower surface of the cap plate 280 is inside the electronic device 1000. The filter film 10 is formed on the lower surface of the cover 280, that is, the filter is disposed inside the electronic device 1000, so that the filter can be protected and the service life of the filter can be prolonged.
It is understood that the cover 280, the filter film 10 and the infrared light source 20 are sequentially disposed from the outside of the electronic device 1000 to the inside of the electronic device 1000 in a direction perpendicular to the cover 280.
In some embodiments, the filter film 10 is formed on the cover plate 280 by electroplating.
Therefore, the manufacturing is simple and convenient, the production efficiency of the electronic device 1000 is improved, and the production cost is reduced.
Of course, the filter film 10 is not limited to be formed on the cover plate 280 by plating, and other methods may be used in other embodiments.
In some embodiments, the electronic device 1000 further includes a main board 300, and the infrared light source 20 is disposed on the main board 300.
In this manner, the main board 300 provides mounting support for the infrared light source 20.
Specifically, the main board 300 is provided with a control circuit, the infrared light source 20 is connected to the control circuit, and the control circuit controls the infrared light source 20 to be turned on or off.
In one example, the infrared camera 30 is electrically connected to the control circuit, and the control circuit is further configured to control the infrared camera 30 to acquire an iris image.
In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (9)
1. A filter membrane is used for an iris recognition module, an electronic device comprises a shell and the iris recognition module, the shell is provided with a transmitting window and a collecting window, the iris recognition module comprises an infrared camera and an infrared light source which are arranged in the shell and exposed from the collecting window, the infrared light source is arranged in the shell and transmits infrared light through the transmitting window, the filter membrane is arranged on the transmitting window and the collecting window, the iris recognition module comprises an infrared light source, the filter membrane covers the infrared light source in the orthographic projection direction of the infrared light source, the iris recognition module determines the identity of a user by comparing the similarity between iris image characteristics, the iris recognition needs to be carried out through the processes of iris image acquisition, iris image processing and iris image recognition, and the infrared camera of the iris recognition module enters infrared light, the filter film is used for enabling infrared light in at least two specific wavelength ranges to pass through and filtering electromagnetic waves except the at least two specific wavelength ranges when the electromagnetic waves pass through the filter film, and the filter film is used for enabling infrared light with the wavelength being larger than or equal to 830nm and smaller than or equal to 870nm and infrared light with the wavelength being larger than or equal to 920nm and smaller than or equal to 960nm to pass through when the electromagnetic waves pass through the filter film, filtering out the electromagnetic waves with the wavelength being smaller than 830nm, the wavelength being larger than 870nm and smaller than 920nm and the wavelength being larger than 960nm, enabling the infrared light in multiple wavelength ranges to pass through, and enabling the infrared light with multiple wavelengths to meet the requirements of irises with different colors during iris recognition.
2. An iris identification module, its characterized in that includes:
an infrared light source for emitting infrared light; and
the filter film of claim 1 disposed in the optical path of the infrared light source.
3. An iris identification module as claimed in claim 2, wherein the infrared light source comprises an LED lamp.
4. An electronic device, comprising:
a housing formed with an emission window; and
the iris recognition module as claimed in claim 2, wherein the infrared light source is disposed within the housing and emits the infrared light through the emission window;
the filter film is arranged on the emission window.
5. The electronic device of claim 4, wherein the housing further forms a capture window, the iris recognition module comprises an infrared camera disposed in the housing and exposed from the capture window, and the filter is disposed on the capture window.
6. The electronic device according to claim 4, wherein the housing includes a casing and a cover plate disposed on the casing, the filter is formed on the cover plate, and an orthographic projection of the filter in a direction of the infrared light source covers the infrared light source.
7. The electronic device according to claim 6, wherein the filter film is formed on a lower surface of the cover plate interposed between the cover plate and the infrared light source.
8. The electronic device of claim 6, wherein the filter is formed on the cover plate by electroplating.
9. The electronic device of claim 4, further comprising a motherboard, wherein the infrared light source is disposed on the motherboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575125.0A CN107451541B (en) | 2017-07-14 | 2017-07-14 | Filter coating, iris recognition module and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575125.0A CN107451541B (en) | 2017-07-14 | 2017-07-14 | Filter coating, iris recognition module and electronic device |
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| Publication Number | Publication Date |
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| CN107451541A CN107451541A (en) | 2017-12-08 |
| CN107451541B true CN107451541B (en) | 2020-08-14 |
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| CN201710575125.0A Expired - Fee Related CN107451541B (en) | 2017-07-14 | 2017-07-14 | Filter coating, iris recognition module and electronic device |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105138996A (en) * | 2015-09-01 | 2015-12-09 | 北京上古视觉科技有限公司 | Iris identification system with living body detecting function |
| CN105874472A (en) * | 2014-02-21 | 2016-08-17 | 三星电子株式会社 | Multi-band biometric camera system having iris color recognition |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203433529U (en) * | 2013-07-31 | 2014-02-12 | 信利光电股份有限公司 | Miniature iris identification camera module and terminal device |
| CN105070728B (en) * | 2015-08-21 | 2018-07-10 | 京东方科技集团股份有限公司 | A kind of display base plate and preparation method thereof, transparent display |
| CN105353556B (en) * | 2015-12-09 | 2017-12-29 | 深圳市华星光电技术有限公司 | Display device |
| CN105678215A (en) * | 2015-12-28 | 2016-06-15 | 北京天诚盛业科技有限公司 | Imaging module, imaging device and mobile terminal |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105874472A (en) * | 2014-02-21 | 2016-08-17 | 三星电子株式会社 | Multi-band biometric camera system having iris color recognition |
| CN105138996A (en) * | 2015-09-01 | 2015-12-09 | 北京上古视觉科技有限公司 | Iris identification system with living body detecting function |
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