CN107273874B - Filter coating, iris recognition module and electronic device - Google Patents
Filter coating, iris recognition module and electronic device Download PDFInfo
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- CN107273874B CN107273874B CN201710575131.6A CN201710575131A CN107273874B CN 107273874 B CN107273874 B CN 107273874B CN 201710575131 A CN201710575131 A CN 201710575131A CN 107273874 B CN107273874 B CN 107273874B
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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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Abstract
The invention discloses a light filtering film, an iris recognition module and an electronic device. The filter film is used for filtering visible light and transmitting infrared light, and the transmittance of the electromagnetic wave with the wavelength less than or equal to 780nm transmitting the filter film is less than or equal to 5%. The filter membrane provided by the embodiment of the invention can filter more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm, so that a user can hardly see red light, and the user experience is improved.
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
In order to assist in collecting the infrared image, the iris identification module comprises an infrared light source. The ideal operating wavelength of the infrared light source is 810nm, however, because the spectrum of the infrared light source is difficult to narrow, the infrared light emitted by the infrared light source often includes visible light with a wavelength of 780nm, and a user can see red light, which affects user experience.
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 filtering visible light and transmitting infrared light, and the transmittance of electromagnetic waves with the wavelength less than or equal to 780nm transmitting the filter film is less than or equal to 5%.
The filter membrane provided by the embodiment of the invention can filter more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm, so that a user can hardly see red light, and the user experience is improved.
In some embodiments, the transmittance of the electromagnetic wave with a wavelength greater than or equal to 810nm through the filter is higher than 80%.
An iris recognition module according to an embodiment of the present invention includes:
an infrared light source for emitting infrared light; and
the filter film according to any one of the above embodiments, which is disposed on an optical path of the infrared light source.
According to the iris identification module, the filter film can filter out more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm, so that a user can hardly see red light, and the user experience is improved.
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 filter out more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm, so that a user can hardly see red light, and the user experience is improved.
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 wavelength-transmittance graph of an electromagnetic wave passing through the filter film according to the 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 2, a filter 10 according to an embodiment of the invention is used for filtering visible light and transmitting infrared light, and a transmittance of an electromagnetic wave with a wavelength of 780nm or less through the filter 10 is 5% or less.
According to the filter film 10 provided by the embodiment of the invention, more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm can be filtered, so that a user can hardly see red light, and the user experience is improved.
It is understood that when the wavelength is 780nm or less, it is visible light and visible to the human eye. Thus, the filter film 10 can be disposed in the optical path of the infrared light emitted from the infrared light source 20 to filter out most of the visible light emitted with the infrared light.
In some embodiments, the transmittance of electromagnetic waves with a wavelength greater than or equal to 810nm through the filter film 10 is greater than 80%.
Thus, when the filter 10 is disposed on the optical path of the infrared light, the filter 10 has a small influence on the transmission of the infrared light, and most of the infrared light can pass through the filter.
An iris recognition module 100 according to an embodiment of the present invention includes an infrared light source 20 and the 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.
According to the iris identification module 100 provided by the embodiment of the invention, more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm can be filtered by the filter film 10, so that a user can hardly see red light, and the user experience is improved.
It can be understood that the infrared light source 20 emits infrared light, but because the infrared light spectrum is difficult to narrow, electromagnetic waves with a wavelength less than or equal to 780nm can be emitted, and the infrared light with a wavelength less than or equal to 780nm is visible light and can be seen by human eyes, therefore, the filter film 10 is disposed on the optical path of the infrared light emitted by the infrared light source 20, and most of the electromagnetic waves with a wavelength less than 780nm are filtered.
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.
An electronic device 1000 according to an embodiment of the present invention includes a housing 200 and the iris recognition module 100 according to the above-described 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.
According to the electronic device 1000 of the embodiment of the invention, the filter film 10 can filter out more than 95% of electromagnetic waves with the wavelength less than or equal to 780nm, so that a user can hardly see red light, and the user experience is improved.
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.
Thus, when the infrared camera 30 collects the iris image, the filter film 10 filters out most visible light, which is helpful for the infrared camera 30 to collect a clearer iris image.
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. Since the iris color of yellow people in asia is usually brown or black, it is difficult to acquire clear iris images by using a common camera. Therefore, in the process of acquiring the iris image, a special infrared camera 30 and an infrared light source 20 are required to be matched for acquisition so as to acquire a clear 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 (3)
1. An electronic device, comprising:
a housing formed with an emission window; and
iris identification module, iris identification module includes: an infrared light source for emitting infrared light; and a filter film arranged on the light path of the infrared light source; wherein the light emitted by the infrared light source comprises electromagnetic waves with a wavelength less than or equal to 780 nm;
the filter film is used for filtering visible light and transmitting infrared light, the transmittance of electromagnetic waves with the wavelength less than or equal to 780nm transmitting the filter film is less than or equal to 5%, and the filter film is applied to the iris recognition module;
the infrared light source is arranged in the shell and emits the infrared light through the emission window;
the filter film is arranged on the emission window;
the shell is also provided with a collection window, the iris identification module comprises an infrared camera which is arranged in the shell and is exposed out of the collection window, and the filter film is arranged on the collection window;
the light supplement range of the infrared light source covers the view field of the infrared camera, and the infrared light source and the infrared camera are arranged at intervals;
the shell comprises a shell and a cover plate arranged on the shell, the filter film is formed on the lower surface of the cover plate in an electroplating mode, the orthographic projection of the filter film towards the infrared light source direction covers the infrared light source, and the filter film is arranged between the cover plate and the infrared light source;
the cover plate comprises a light-transmitting area, and the light-transmitting area of the cover plate forms the emission window and the collection window.
2. The electronic device according to claim 1, wherein the transmittance of the electromagnetic wave with a wavelength greater than or equal to 810nm through the filter is higher than 80%.
3. The electronic device of claim 1, further comprising a motherboard, wherein the infrared light source is disposed on the motherboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710575131.6A CN107273874B (en) | 2017-07-14 | 2017-07-14 | Filter coating, iris recognition module and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710575131.6A CN107273874B (en) | 2017-07-14 | 2017-07-14 | Filter coating, iris recognition module and electronic device |
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| CN107273874A CN107273874A (en) | 2017-10-20 |
| CN107273874B true CN107273874B (en) | 2020-05-22 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN207780800U (en) * | 2017-12-13 | 2018-08-28 | 广东欧珀移动通信有限公司 | For the iris recognition component of electronic device and with its electronic device |
| CN207780802U (en) * | 2017-12-13 | 2018-08-28 | 广东欧珀移动通信有限公司 | For the iris recognition component of electronic device and with its electronic device |
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| 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 |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105137567B (en) * | 2015-08-12 | 2017-09-12 | 北京天诚盛业科技有限公司 | Imaging lens, iris imaging module and iris identification device |
| CN106548115A (en) * | 2015-09-18 | 2017-03-29 | 比亚迪股份有限公司 | CCD camera assembly and the mobile device with which |
| CN205304936U (en) * | 2015-12-01 | 2016-06-08 | 惠州凯尔光电有限公司 | Shoot and multiplexing camera module of iris discernment |
| CN205195819U (en) * | 2015-12-02 | 2016-04-27 | 江阴新晟电子有限公司 | Two megapixel cell -phone cameras with iris recognition function |
| CN106094088A (en) * | 2016-08-24 | 2016-11-09 | 上海光和光学制造大丰有限公司 | A kind of have the optical filter taken pictures with iris identification concurrently |
| CN106210477A (en) * | 2016-08-24 | 2016-12-07 | 上海光和光学制造大丰有限公司 | A kind of camera module compatible with iris identification of taking pictures |
| CN106709434A (en) * | 2016-12-07 | 2017-05-24 | 上海集成电路研发中心有限公司 | Iris identification module group and iris identification system |
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Patent Citations (2)
| 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 |
| 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 |
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Address after: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant after: OPPO Guangdong Mobile Communications Co., Ltd. Address before: 523860 No. 18, Wu Sha Beach Road, Changan Town, Dongguan, Guangdong Applicant before: Guangdong OPPO Mobile Communications Co., Ltd. |
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