CN105631438A - Optical fingerprint recognition device - Google Patents
Optical fingerprint recognition device Download PDFInfo
- Publication number
- CN105631438A CN105631438A CN201610086908.8A CN201610086908A CN105631438A CN 105631438 A CN105631438 A CN 105631438A CN 201610086908 A CN201610086908 A CN 201610086908A CN 105631438 A CN105631438 A CN 105631438A
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- China
- Prior art keywords
- light
- identification device
- fingerprint identification
- optical fingerprint
- transparent member
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- 230000003287 optical effect Effects 0.000 title claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims description 26
- 238000000576 coating method Methods 0.000 claims description 26
- 239000000463 material Substances 0.000 claims description 9
- 239000005304 optical glass Substances 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 6
- 229920003023 plastic Polymers 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 238000002834 transmittance Methods 0.000 claims description 6
- 229910052732 germanium Inorganic materials 0.000 claims description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000002052 molecular layer Substances 0.000 claims description 2
- 238000001914 filtration Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000003796 beauty Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000001795 light effect Effects 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000005315 stained glass Substances 0.000 description 1
Classifications
-
- 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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The invention provides an optical fingerprint recognition device, and the device comprises a light source which is used for generating light; a light transmission part which comprises a first surface used for contacting a fingerprint and a second surface equipped with a light filtering film, wherein the light filtering film only allows infrared light in the light to enter the light transmission part; and an image sensor which is used for receiving the infrared light from the light transmission part and forming a fingerprint image. The device filters the visible light in the light through the light filtering film, and only allows the infrared light in the light to enter the light transmission part. The image sensor receives the infrared light from the light transmission part and forms the fingerprint image. The device can change the color of the light filtering film, and enables the color of the light filtering film to be consistent with the color of a portable electronic equipment panel, thereby facilitating the integration of the light filtering film and portable electronic equipment, and guaranteeing the overall beauty of the equipment panel.
Description
Technical field
The present invention relates to image processing field, particularly relate to a kind of optical fingerprint identification device.
Background technology
As shown in Figure 1, existing optical fingerprint identification device is generally adopted transparent light transparent member 10(such as transparent prism), it includes first surface 11 and second surface 12, when finger print 40 is contacted with first surface 11, the visible ray 21 that light source 20 sends enters light transparent member 10 and is irradiated on finger print 40, it is irradiated to the visible ray in fingerprint mountain valley 41 at first surface 11, second surface 12 is totally reflected, the visible ray being irradiated to fingerprint ridgeline 42 transmits from second surface 12 after diffuse-reflectance occurs first surface 11, by imageing sensor 30(such as cmos image sensor) receive and form fingerprint image.
Owing to light transparent member 10 is generally transparent, when existing optical fingerprint identification device is integrated in the coloured glass panel of portable electric appts (such as main flow smart mobile phone), the color of light transparent member 10 is inconsistent with the color of mobile phone faceplate about, and light transparent member 10 can be passed through and see structures below, mobile phone faceplate overall appearance will necessarily be destroyed.
Summary of the invention
It is an object of the invention to provide a kind of optical fingerprint identification device, it is simple to integrated with portable electric appts, it is ensured that device panel overall appearance.
Based on considerations above, the present invention provides a kind of optical fingerprint identification device, comprising: light source, is used for producing light; Light transparent member, including for contacting the first surface of finger print and being provided with the second surface of filter coating, described filter coating only allows the infrared light in described light to enter light transparent member; Imageing sensor, forms fingerprint image for receiving the infrared light transmitted from light transparent member.
Preferably, described filter coating to the light transmittance of visible ray less than 10%, to the light transmittance of infrared light more than 90%.
Preferably, the material of described filter coating is silicon, germanium or organic high molecular layer.
Preferably, described filter coating is monofilm or multilayer film.
Preferably, the wave-length coverage of described infrared light is 0.75 ��m-8 ��m.
Preferably, described light source is LED light source or LASER Light Source.
Preferably, described infrared light refractive index in light transparent member is n1, and aerial refractive index is n2, and the angular range of the first surface of described infrared light and described light transparent member is 0 ~ 90-arcsin(n2/n1).
Preferably, the material of described light transparent member is optical glass, resin or plastics.
Preferably, described optical fingerprint identification device also includes the light guide member being arranged on the second surface of described light transparent member, is used for guiding described infrared light to enter described light transparent member.
Preferably, the material of described light guide member is optical glass, resin or plastics.
The optical fingerprint identification device of the present invention, the visible ray in light is filtered by filter coating, infrared light therein is only made to enter light transparent member, imageing sensor receives the infrared light transmitted from light transparent member and forms fingerprint image, the present invention can pass through to change the color of filter coating, it is made to keep consistent with the color of portable electric appts panel, consequently facilitating integrated with portable electric appts, it is ensured that device panel overall appearance.
Accompanying drawing explanation
Reading the following detailed description to non-limiting example by referring to accompanying drawing, the other features, objects and advantages of the present invention will become more apparent upon.
Fig. 1 is the structural representation of existing optical fingerprint identification device;
Fig. 2 is the structural representation of the optical fingerprint identification device of one embodiment of the invention;
Fig. 3 is the structural representation of the optical fingerprint identification device of another embodiment of the present invention.
In the drawings, running through different diagrams, same or similar accompanying drawing labelling represents same or analogous device (module) or step.
Detailed description of the invention
For solving above-mentioned the problems of the prior art, the present invention provides a kind of optical fingerprint identification device, the visible ray in light is filtered by filter coating, infrared light therein is only made to enter light transparent member, imageing sensor receives the infrared light transmitted from light transparent member and forms fingerprint image, and the present invention can pass through to change the color of filter coating so that it is keeps consistent with the color of portable electric appts panel, consequently facilitating integrated with portable electric appts, it is ensured that device panel overall appearance.
In the specific descriptions of following preferred embodiment, reference is constituted the accompanying drawing appended by a present invention part. Appended accompanying drawing has been illustrated by way of example and has been capable of specific embodiment. The embodiment of example is not intended as the limit all embodiments according to the present invention. It is appreciated that under the premise not necessarily departing from the scope of the present invention, it is possible to use other embodiments, it is also possible to carry out structural or logicality amendment. Therefore, following specific descriptions are also nonrestrictive, and the scope of the present invention is defined by the claims appended hereto.
Fig. 2 illustrates an embodiment of the optical fingerprint identification device of the present invention. This optical fingerprint identification device includes: light source 120, is used for producing light 121; Light transparent member 110, it includes for contacting the first surface 111 of finger print 140 and being provided with the second surface 112 of filter coating 113, and described filter coating 112 only allows the infrared light 122 in described light 121 to enter light transparent member 110; Imageing sensor 130, forms fingerprint image for receiving the infrared light 122 transmitted from light transparent member 110.
Wherein, the material of described light transparent member 110 is optical glass, resin or plastics, and it includes first surface 111 and second surface 112, and first surface 111 is used for contacting finger print, and second surface is provided with filter coating 113. The optical characteristics of described filter coating 113 is that spectrum has bandpass filtering character, visible ray is had very strong absorption (such as to the light transmittance of visible ray less than 10%), the infrared light that wave-length coverage is 0.75 ��m-8 ��m is had more weak absorption (such as to the light transmittance of infrared light more than 90%). Described filter coating 113 can be coat or plate one layer and select absorbing film or the monolayer formed by dielectric material or multilayer film, utilizes interference of light effect in film, it is thus achieved that only allow the optical characteristics of infrared transmission. The material of filter coating 113 can be the inorganic matter coating such as silicon, germanium or other organic high molecular layers. The color of filter coating 113 can be the white consistent with main flow portable electric appts panel, black, gold, pink colour etc., to ensure device panel overall appearance.
Wherein, described light source 120 is LED light source or LASER Light Source, is used for producing light 121(and includes visible ray and infrared light), after the filtered film 113 of this light 121 filters, only infrared light 122 therein enters light transparent member 110. Assume that the described infrared light 122 refractive index in light transparent member 110 is n1, aerial refractive index is n2, when the angular range of described infrared light 122 with the first surface 111 of described light transparent member 110 is 0 ~ 90-arcsin(n2/n1) time, the infrared light 122 being irradiated to first surface 111 is totally reflected. When finger print 140 is contacted with first surface 111, the infrared light being irradiated to fingerprint mountain valley 141 is totally reflected at first surface 111, second surface 112, and the total reflection condition being irradiated to the infrared light of fingerprint ridgeline 142 is destroyed, then there is diffuse-reflectance at first surface 111, then transmit from second surface 112, by imageing sensor 130(such as cmos image sensor) receive and form fingerprint image.
Fig. 3 illustrates another embodiment of the optical fingerprint identification device of the present invention. With the embodiment shown in Fig. 2 similarly, the optical fingerprint identification device in the present embodiment includes: light source 220, is used for producing light 221; Light transparent member 210, it includes for contacting the first surface 211 of finger print 240 and being provided with the second surface 212 of filter coating 213, and described filter coating 212 only allows the infrared light 222 in described light 221 to enter light transparent member 210; Imageing sensor 230, forms fingerprint image for receiving the infrared light 222 transmitted from light transparent member 210. With the embodiment shown in Fig. 2 differently, the optical fingerprint identification device in the present embodiment also includes the light guide member 250 being arranged on the second surface 212 of described light transparent member 210, is used for guiding described infrared light 222 to enter described light transparent member 210. Preferably, the material of described light guide member 250 is optical glass, resin or plastics.
The optical fingerprint identification device of the present invention, the visible ray in light is filtered by filter coating, infrared light therein is only made to enter light transparent member, imageing sensor receives the infrared light transmitted from light transparent member and forms fingerprint image, the present invention can pass through to change the color of filter coating, it is made to keep consistent with the color of portable electric appts panel, consequently facilitating integrated with portable electric appts, it is ensured that device panel overall appearance.
It is obvious to a person skilled in the art that the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when without departing substantially from the spirit of the present invention or basic feature, it is possible to realize the present invention in other specific forms. Therefore, in any case, embodiment all should be regarded as exemplary, and be nonrestrictive. Additionally, it will be evident that " including " word is not excluded for other elements and step, and wording " one " is not excluded for plural number. In device claim, multiple elements of statement can also be realized by an element. The first, the second word such as grade is used for representing title, and is not offered as any specific order.
Claims (10)
1. an optical fingerprint identification device, it is characterised in that including:
Light source, is used for producing light;
Light transparent member, including for contacting the first surface of finger print and being provided with the second surface of filter coating, described filter coating only allows the infrared light in described light to enter light transparent member;
Imageing sensor, forms fingerprint image for receiving the infrared light transmitted from light transparent member.
2. optical fingerprint identification device as claimed in claim 1, it is characterised in that described filter coating to the light transmittance of visible ray less than 10%, to the light transmittance of infrared light more than 90%.
3. optical fingerprint identification device as claimed in claim 1, it is characterised in that the material of described filter coating is silicon, germanium or organic high molecular layer.
4. optical fingerprint identification device as claimed in claim 1, it is characterised in that described filter coating is monofilm or multilayer film.
5. optical fingerprint identification device as claimed in claim 1, it is characterised in that the wave-length coverage of described infrared light is 0.75 ��m-8 ��m.
6. optical fingerprint identification device as claimed in claim 1, it is characterised in that described light source is LED light source or LASER Light Source.
7. optical fingerprint identification device as claimed in claim 1, it is characterized in that, described infrared light refractive index in light transparent member is n1, and aerial refractive index is n2, and the angular range of the first surface of described infrared light and described light transparent member is 0 ~ 90-arcsin(n2/n1).
8. optical fingerprint identification device as claimed in claim 1, it is characterised in that the material of described light transparent member is optical glass, resin or plastics.
9. optical fingerprint identification device as claimed in claim 1, it is characterised in that also include the light guide member being arranged on the second surface of described light transparent member, is used for guiding described infrared light to enter described light transparent member.
10. optical fingerprint identification device as claimed in claim 9, it is characterised in that the material of described light guide member is optical glass, resin or plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086908.8A CN105631438A (en) | 2016-02-16 | 2016-02-16 | Optical fingerprint recognition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610086908.8A CN105631438A (en) | 2016-02-16 | 2016-02-16 | Optical fingerprint recognition device |
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| Publication Number | Publication Date |
|---|---|
| CN105631438A true CN105631438A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610086908.8A Pending CN105631438A (en) | 2016-02-16 | 2016-02-16 | Optical fingerprint recognition device |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106372587A (en) * | 2016-08-29 | 2017-02-01 | 乐视控股（北京）有限公司 | Fingerprint identification method and device |
| CN106873063A (en) * | 2017-02-23 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of display device |
| CN107092402A (en) * | 2017-04-19 | 2017-08-25 | 维沃移动通信有限公司 | A kind of display screen and electronic equipment |
| CN107423691A (en) * | 2017-06-28 | 2017-12-01 | 联想(北京)有限公司 | A kind of fingerprint sensor, electronic equipment and fingerprint sensor manufacture method |
| CN107862269A (en) * | 2017-10-31 | 2018-03-30 | 苏州科阳光电科技有限公司 | Optical finger print module, optical finger print module preparation method and mobile terminal |
| CN107944334A (en) * | 2017-08-17 | 2018-04-20 | 深圳信炜科技有限公司 | Photosensitive device and electronic equipment |
| CN107958196A (en) * | 2017-08-17 | 2018-04-24 | 深圳信炜科技有限公司 | Sensitive chip and electronic equipment |
| CN107978050A (en) * | 2017-12-15 | 2018-05-01 | 浙江钜士安防科技股份有限公司 | The finger-print puzzle lock and its method for unlocking that a kind of fingerprint is unlocked with crypto-sync verification |
| WO2019033358A1 (en) * | 2017-08-17 | 2019-02-21 | 深圳信炜科技有限公司 | Photosensitive chip and electronic device |
| WO2019033347A1 (en) * | 2017-08-17 | 2019-02-21 | 深圳信炜科技有限公司 | Photosensitive apparatus and electronic device |
| US10656764B2 (en) | 2017-02-23 | 2020-05-19 | Boe Technology Group Co., Ltd. | Touch device and display device |
| CN111209785A (en) * | 2018-11-22 | 2020-05-29 | 上海耕岩智能科技有限公司 | Fingerprint acquisition device and manufacturing method thereof |
| CN111310527A (en) * | 2018-12-12 | 2020-06-19 | 上海耕岩智能科技有限公司 | Under-screen image acquisition structure and electronic equipment |
| CN111832359A (en) * | 2019-04-19 | 2020-10-27 | 格科微电子（上海）有限公司 | Method for reducing height of optical fingerprint identification module |
| WO2021042248A1 (en) * | 2019-09-02 | 2021-03-11 | 深圳市汇顶科技股份有限公司 | Fingerprint detection method and apparatus, and electronic device |
| CN107480579B (en) * | 2016-06-08 | 2021-03-16 | 联咏科技股份有限公司 | Optical sensor element and fingerprint sensor device |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107480579B (en) * | 2016-06-08 | 2021-03-16 | 联咏科技股份有限公司 | Optical sensor element and fingerprint sensor device |
| CN106372587A (en) * | 2016-08-29 | 2017-02-01 | 乐视控股（北京）有限公司 | Fingerprint identification method and device |
| WO2018153065A1 (en) * | 2017-02-23 | 2018-08-30 | 京东方科技集团股份有限公司 | Display apparatus |
| CN106873063A (en) * | 2017-02-23 | 2017-06-20 | 京东方科技集团股份有限公司 | A kind of display device |
| US10656764B2 (en) | 2017-02-23 | 2020-05-19 | Boe Technology Group Co., Ltd. | Touch device and display device |
| CN106873063B (en) * | 2017-02-23 | 2018-09-18 | 京东方科技集团股份有限公司 | A kind of display device |
| CN107092402A (en) * | 2017-04-19 | 2017-08-25 | 维沃移动通信有限公司 | A kind of display screen and electronic equipment |
| CN107423691A (en) * | 2017-06-28 | 2017-12-01 | 联想(北京)有限公司 | A kind of fingerprint sensor, electronic equipment and fingerprint sensor manufacture method |
| WO2019033358A1 (en) * | 2017-08-17 | 2019-02-21 | 深圳信炜科技有限公司 | Photosensitive chip and electronic device |
| CN107958196A (en) * | 2017-08-17 | 2018-04-24 | 深圳信炜科技有限公司 | Sensitive chip and electronic equipment |
| WO2019033347A1 (en) * | 2017-08-17 | 2019-02-21 | 深圳信炜科技有限公司 | Photosensitive apparatus and electronic device |
| CN107944334A (en) * | 2017-08-17 | 2018-04-20 | 深圳信炜科技有限公司 | Photosensitive device and electronic equipment |
| CN107944334B (en) * | 2017-08-17 | 2021-03-02 | 深圳信炜科技有限公司 | Photosensitive device and electronic equipment |
| CN113158873A (en) * | 2017-08-17 | 2021-07-23 | 深圳信炜科技有限公司 | Photosensitive chip and electronic equipment |
| CN107862269A (en) * | 2017-10-31 | 2018-03-30 | 苏州科阳光电科技有限公司 | Optical finger print module, optical finger print module preparation method and mobile terminal |
| CN107978050A (en) * | 2017-12-15 | 2018-05-01 | 浙江钜士安防科技股份有限公司 | The finger-print puzzle lock and its method for unlocking that a kind of fingerprint is unlocked with crypto-sync verification |
| CN111209785A (en) * | 2018-11-22 | 2020-05-29 | 上海耕岩智能科技有限公司 | Fingerprint acquisition device and manufacturing method thereof |
| CN111310527A (en) * | 2018-12-12 | 2020-06-19 | 上海耕岩智能科技有限公司 | Under-screen image acquisition structure and electronic equipment |
| CN111832359A (en) * | 2019-04-19 | 2020-10-27 | 格科微电子（上海）有限公司 | Method for reducing height of optical fingerprint identification module |
| WO2021042248A1 (en) * | 2019-09-02 | 2021-03-11 | 深圳市汇顶科技股份有限公司 | Fingerprint detection method and apparatus, and electronic device |
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