CN104463107A - Backlight plate, optical imaging device and identification equipment - Google Patents
Backlight plate, optical imaging device and identification equipment Download PDFInfo
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- CN104463107A CN104463107A CN201410674651.9A CN201410674651A CN104463107A CN 104463107 A CN104463107 A CN 104463107A CN 201410674651 A CN201410674651 A CN 201410674651A CN 104463107 A CN104463107 A CN 104463107A
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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
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
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Abstract
The invention provides a backlight plate, an optical imaging device and identification equipment. The backlight plate comprises a substrate and a light source which is arranged on the substrate and used for emitting emergent light, and the light source comprises a first light source which emits visible light and a second light source which emits near-infrared light. The emergent light emitted by the light source on the backlight plate can penetrate through an optical area array sensor and then penetrates through an imaging window protection layer, the emergent light penetrating through the imaging window protection layer can be reflected by a contact interface which is in contact with the imaging window protection layer, the reflected emergent light forms incident light which irradiates to the optical area array sensor, and the optical area array sensor performs photovoltaic conversion and signal processing to emitted light: when the emergent light is visible light, sampling of a fingerprint image is realized; when the emergent light is near-infrared light, collection of a vein image is realized. The backlight plate integrates the collection function of the fingerprint image and the collection function of the vein image, the security classification is high, and the safety is good.
Description
Technical field
The present invention relates to identification field, be specifically related to a kind of backlight, optical imaging device and identification apparatus.
Background technology
Fingerprint imaging recognition technology is the fingerprint image being collected human body by fingerprint sensor, then compares with the existing fingerprint imaging information in system, whether carrys out correct judgment, and then realize the technology of identification.
Due to the convenience that it uses, and the uniqueness of somatic fingerprint, fingerprint identification technology is widely used in every field.The such as field of safety check such as public security bureau, customs, the gate control system of building, and the consumer product area such as PC and mobile phone etc.
The implementation of fingerprint imaging technique has the multiple technologies such as optical imagery, capacitance imaging, ultrasonic imaging.Comparatively speaking, optical image technology, its imaging effect is relatively better, and equipment cost is relatively low.
As shown in Figure 1, optical fingerprint imaging system mainly comprises: backlight 10, optical surface array sensor 20, imaging window protective seam 30; The substrate 50 of backlight 10 is provided with light source, for launching emergent light 11; Imaging window protective seam 30 for providing fingerprint recognition surface of contact, also for providing the reflecting surface making described emergent light 11 reflect; Optical surface array sensor 20 is for receiving incident light 12, and opto-electronic conversion and signal transacting are carried out to incident light 12, realize the collection of fingerprint image, optical surface array sensor 20 is made up of pixel unit array, drive wire, signal sense wire etc., when carrying out fingerprint sensing, light signal with image information directly projects each pixel cell of sensor imaging surface, is absorbed and imaging by the pixel cell of sensor.
When gathering fingerprint image, human body finger 40 is positioned on the surface of contact on imaging window protective seam 30; The emergent light 11 that light source in backlight 10 is launched, through optical surface array sensor 20 and imaging window protective seam 30, reflects at the contact interface of human body finger 40 with imaging window protective seam 30, forms incident light 12; Incident light 12, through imaging window protective seam 30, is irradiated on optical surface array sensor 20; Incident light 12 is converted into electronic signal by optical surface array sensor 20, then stores for signal transacting, realizes the collection of fingerprint image.
Human body finger 40 reflects the fingerprint characteristic of human body with the surface of contact feature of imaging window protective seam 30; and the feature of this surface of contact directly can affect the feature of incident light 12; therefore; the image that optical surface array sensor 20 collects directly reflects the feature of somatic fingerprint, thus can realize fingerprint recognition.
Existing fingerprint imaging system just only gathers fingerprint image, function singleness, and finger print information is easily stolen, and security is low.
Summary of the invention
The problem that the present invention solves is that existing fingerprint imaging system just only gathers fingerprint image, function singleness, and finger print information is easily stolen, and security is low.
For solving the problem, the invention provides a kind of backlight for optical imaging system, comprising:
Substrate;
Be located at the light source on described substrate, for launching emergent light, described light source comprises the first light source launching visible ray and the secondary light source launching near infrared light.
Optionally, described light source is side light source, is located at least one side of described substrate.
Optionally, described light source is backlight, is laid on described substrate.
Optionally, in described first light source and secondary light source, one of them is located at least one side of described substrate, and another is laid on described substrate.
Optionally, the visible ray that described first light source is launched is: the one in white light, purple light, cyan light, blue light, green light, sodium yellow, orange-colored light.
Optionally, also comprise: be positioned at the reflection mating plate on described substrate;
Be positioned at the light guide plate on described reflection mating plate;
Be located at the diffusion barrier in described light guide plate, for diffused light source.
Optionally, also comprise diffusion barrier or diffuser plate, be located on described backlight.
Optionally, described backlight is LCD display panel or LED display panel or OLED display panel;
Described first light source, described secondary light source are located on the substrate of described LCD display panel or LED display panel or OLED display panel.
The present invention also provides a kind of optical imaging device, comprising:
Backlight described in any one;
Imaging window protective seam, for providing the surface of contact placing object;
Optical surface array sensor, the emergent light that the first light source in described backlight or secondary light source are launched is through after described optical surface array sensor and described imaging window protective seam, after irradiating the object be affixed on described imaging window protective seam, reflect to form incident light;
Described optical surface array sensor receives described incident light, and obtains the image-forming information corresponding with described object based on described incident light.
Optionally, the described object that described first light source or secondary light source irradiate is human body finger;
Described image-forming information is human body fingerprint imaging information or human body finger Arterography venography information;
Described first light source launches emergent light, and described image-forming information is human body fingerprint imaging information;
Described secondary light source launches emergent light, and described image-forming information is human body finger Arterography venography information.
Optionally, the described object that described first light source or secondary light source irradiate is human body palm;
Described image-forming information is human body palmmprint image-forming information or human body palm vein blood vessel imaging information;
Described first light source launches emergent light, and described image-forming information is human body palmmprint image-forming information;
Described secondary light source launches emergent light, and described image-forming information is human body palm vein blood vessel imaging information.
The present invention also provides a kind of identification apparatus, comprising: the optical imaging device described in any one.
Optionally, also comprise: optical imagery recognition system, described optical imagery recognition system comprises:
Storage unit, for prestoring user's image-forming information, described user's image-forming information comprises user fingerprints image-forming information and user's Arterography venography information;
Judging unit, compares with described user's image-forming information of storage for the image-forming information obtained by described optical imaging device, judges whether the image-forming information that optical imaging device obtains mates with described user's image-forming information of storage.
Optionally, described identification apparatus is gate control system or mobile terminal or safe examination system.
Compared with prior art, technical scheme of the present invention has the following advantages:
Light source in backlight of the present invention can launch emergent light, light source comprises the first light source launching visible ray and the secondary light source launching near infrared light, the emergent light that light source in backlight sends can through optical surface array sensor, can be reflected by the contact interface contacted with imaging window protective seam with the emergent light of imaging window protective seam through optical surface array sensor, the emergent light of reflection forms incident light, incident illumination is mapped on optical surface array sensor, optical surface array sensor carries out opto-electronic conversion and signal transacting to utilizing emitted light: when emergent light is visible ray, realize the collection of fingerprint image, when emergent light is near infrared light, realize the collection of vein blood vessel image, the present invention has the acquisition function of fingerprint image and the acquisition function of vein blood vessel image concurrently, and security classification is high, and security is good.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art optical finger print imaging system;
Fig. 2 is first embodiment of the invention side light emitting type backlight plate structure schematic diagram;
Fig. 3 is second embodiment of the invention downward back light plate structure schematic diagram;
The structural representation of Fig. 4 to be third embodiment of the invention backlight be LCD;
The structural representation of Fig. 5 to be fourth embodiment of the invention backlight be OLED;
The structural representation of Fig. 6 to be fifth embodiment of the invention backlight be LED;
Fig. 7 is the structural representation of optical surface array sensor of the present invention.
Embodiment
Existing fingerprint imaging system belongs to the one in identity recognizing technology, and it only can gather fingerprint image, function singleness, and finger print information is easily stolen, and security is low.
Identity recognizing technology also comprises vein blood vessel recognition technology, it is a kind of bio-assay technique Rapid identification and the method identifying people's identity, collected vascular site is irradiated with near infrared ray fill-in light, gather vascular lake figure, then compare with the existing blood vessel imaging information in system, whether carry out correct judgment, and then realize the technology of identification.Because it is difficult to the property stolen and can not being forged property and the uniqueness of shape of blood vessel, vein blood vessel recognition technology is applied to every field.Such as senior security protection, as bank, traffic, E-Government etc.
Vein blood vessel recognition technology is integrated in fingerprint recognition imaging system by the present invention, existing optical finger print imaging system is made to increase Arterography venography function, optical finger print imaging system is made to have the acquisition function of fingerprint image and the acquisition function of vein blood vessel image concurrently, security classification is high, and security is good.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
Continue with reference to figure 1, the invention provides a kind of optical imaging device, for the fingerprint of human body finger is carried out imaging with obtain fingerprint imaging information and to human vein blood vessel imaging to obtain Arterography venography information, comprising:
Backlight 10, comprise substrate 50, substrate 50 is provided with light source, for launching emergent light 11, light source comprises the first light source launching visible ray and the secondary light source launching near infrared light, and the visible ray that the first light source is launched is: the one in white light, purple light, cyan light, blue light, green light, sodium yellow, orange-colored light;
Imaging window protective seam 30, for providing the surface of contact placing human body finger 40; Imaging window protective seam 30 is glass, and the upper surface of described glass is surface of contact, and when carrying out fingerprint imaging, human body finger 40 is positioned on the upper surface of described glass; The material of imaging window protective seam 30 does not limit, and imaging window protective seam 30 material can also be optical fiber guide plate, sapphire, or can the plastics of printing opacity;
Optical surface array sensor 20, between imaging window protective seam 30 and backlight 10.
When carrying out fingerprint imaging, human body finger 40 is placed on the surface of contact on imaging window protective seam 30, the emergent light 11 that the first light source in backlight 10 is launched is through after optical surface array sensor 20, enter to imaging window protective seam 30 after exposing to surface of contact on imaging window protective seam 30 and human body finger 40, form incident light 12 through imaging window protective seam 30 afterwards; The corresponding incident light 12 formed is directly related with the feature of human body finger 40 fingerprint, and incident light 12 embodies the finger print information of human body finger 40, provides possibility for realizing fingerprint imaging.Optical surface array sensor 20 receives incident light 12, and optical surface array sensor 20 pairs of incident lights 12 carry out opto-electronic conversion and signal transacting, and obtains the image-forming information corresponding with human body finger 40 based on incident light 12; It is visible ray that first light source launches emergent light 11, and image-forming information is human body fingerprint imaging information, realizes the collection of fingerprint image.
When carrying out Arterography venography, human body finger 40 is placed on the surface of contact on imaging window protective seam 30, the emergent light 11 that secondary light source in backlight 10 is launched is through after optical surface array sensor 20, imaging window protective seam 30 is entered to after exposing to surface of contact on imaging window protective seam 30 and human body finger 40, incident light 12 is formed afterwards through imaging window protective seam 30, optical surface array sensor 20 receives incident light 12, optical surface array sensor 20 pairs of incident lights 12 carry out opto-electronic conversion and signal transacting, and obtain the image-forming information corresponding with human body finger 40 based on incident light 12, it is near infrared light that secondary light source launches emergent light 11, and image-forming information is human body finger Arterography venography information, realizes the collection of vein blood vessel image, the present invention has the acquisition function of fingerprint image and the acquisition function of vein blood vessel image concurrently, and security classification is high, and security is good.
In addition, the surface of contact on imaging window protective seam 30 can also place human body palm, and the image-forming information gathered is human body palmmprint image-forming information or human body palm vein blood vessel imaging information.When carrying out fingerprint imaging and Arterography venography, the object that described imaging window protective seam 30 surface of contact is placed is not limited only to human body palm and human finger.
Particularly, with reference to figure 2, backlight 10 can be side light emitting type backlight plate, comprising: side light source 10a, and side light source 10a is located at least one side of substrate 50, and in the illustrated embodiment in which, side light source 10a is located at a side of substrate 50.Side light source 10a comprises: light-transmission substrate, is arranged at the light emitting diode in described light-transmission substrate, and wherein, described light-transmission substrate is quartz, glass or light-passing plastic.
Wherein, the first light source, secondary light source can also be located at substrate 50 two sides respectively, or one of them light source is located at the side of substrate 50, and another light source is located at the below of substrate 50.
With reference to figure 2, in the present embodiment, substrate 50 comprises: for the reflection mating plate 10b of reflection source, for line source being changed into the light guide plate 10c of area source and being used for the diffusion barrier 10d of diffused light source, reflection mating plate 10b, light guide plate 10c and diffusion barrier 10d arrange successively, and the light that side light source 10a launches forms emergent light 11 successively after reflection mating plate 10b, light guide plate 10c and diffusion barrier 10d.
With reference to figure 3, backlight 10 can also be downward back tabula rasa, comprise: backlight 10e, backlight 10e is laid on the substrate 50 of backlight 10, above backlight 10e, be provided with the diffuser plate 10f (can also be diffusion barrier) for diffused light source, the light that backlight 10e launches forms emergent light 11 after diffuser plate 10f or diffusion barrier.
Backlight 10 can be served as by LCD display panel, LED display panel or OLED display panel in the present invention, first light source and secondary light source are set in the substrate side surfaces of LCD display panel, LED display panel or OLED display panel or below, object of the present invention can be realized.
With reference to figure 4, backlight 10 is LCD (liquid crystal display) display panel, comprises the backlight 10g be located on substrate 50, lower polaroid 10h, lower baseplate glass 10i, liquid crystal layer 10j, upper substrate glass 10k and upper polaroid 10m etc.;
With reference to figure 5, backlight 10 is OLED (Organic Light Emitting Diode) display panel, comprising: base plate glass 10n and oled layer 10p etc.;
With reference to figure 6, backlight 10 is LED (light emitting diode) display panel, comprising: PCB substrate 10q, LED array 10r etc.;
LCD display panel or LED display panel or OLED display panel are equipped with the first light source can launching visible ray and the secondary light source launching near infrared light, can launch emergent light 11.Wherein, the substrate of LCD display panel is provided with the first light source, secondary light source; The PCB substrate 10q of LED display panel is provided with the first light source, secondary light source, and the base plate glass 10n of OLED display panel is provided with the first light source, secondary light source.
In addition, optical surface array sensor 20 in embodiment of the present invention optical imaging device can be the cmos sensor be produced on wafer, or optical surface array sensor 20 can be the amorphous silicon detector be produced on glass substrate, plastic base or stainless steel substrate, oxide-semiconductor sensor or low-temperature polysilicon silicon sensor.
Particularly, with reference to figure 7, optical surface array sensor 20 comprises:
Substrate 24;
Be positioned at the pixel cell 21 be arranged in array on substrate 24, the photoelectric device (scheming not shown) that pixel cell 21 comprises sensor devices 21b, switching device 21a and is connected with switching device 21a, photoelectric device is used for the light signal with image-forming information to be converted to electric signal;
Be positioned at the drive wire 22 in the row direction on substrate 24, corresponding with the switching device 21a of pixel cell 21 connected;
Be positioned at the driving patchcord along column direction (scheming not shown) on substrate 24, correspondingly with drive wire 22 connect, for can make the start signal of switching device 21a conducting to drive wire 22 transmission;
Be positioned at the signal wire 23 along column direction on substrate, corresponding with the photoelectric device of pixel cell connected, for the described electric signal that transmission light electrical part is formed.
Described battle array fingerprint sensor 20 also comprises controller (scheming not shown), for the drive wire 22 on control both optical area array sensor 20, and then controls the unlatching line by line of pixel cell 21 array; Simultaneously, controller carrys out the electronic signal of that a line be unlocked in read pixel unit 21 array by the signal wire 23 on face battle array fingerprint sensor 20, then carry out amplifying, analog to digital conversion, storage, finally obtain a digital grey scale image directly related with illuminated object surface structure.
Wherein, pixel cell 21, drive wire 22, driving patchcord and signal wire 23 constitute the light tight region of optical surface array sensor 20, and the region outside light tight region is the transmission region of optical surface array sensor 20.
With reference to figure 1, the emergent light 11 that in backlight 10, light source is launched can penetrate transmission region on optics area array sensor 20 to human body finger 40 and imaging window protective seam 30.
Correspondingly, the present invention also provides a kind of identification apparatus, comprises described optical imaging device.
Be integrated with optical imagery recognition system in optical imaging device, described optical imagery recognition system comprises:
Storage unit, for prestoring user's image-forming information, described user's image-forming information comprises user fingerprints image-forming information and user's Arterography venography information;
Judging unit, compares with described user's image-forming information of storage for the image-forming information obtained by described optical imaging device, judges whether the image-forming information that optical imaging device obtains mates with described user's image-forming information of storage.
Particularly, if fingerprint imaging information is not mated with described user fingerprints information or Arterography venography information is not mated with described user's Arterography venography information, then represent user when the current user carrying out fingerprint detection or vein blood vessel monitoring is not initial setting up; If image-forming information and user's image-forming information match, then represent user when the current user carrying out fingerprint detection or vein blood vessel retrieval is initial setting up.
With reference to figure 1, adopt identification apparatus of the present invention to carry out identification, image-forming information gatherer process is as follows:
First light source sends the first emergent light, and described first emergent light comprises the one in white light, purple light, cyan light, blue light, green light, sodium yellow, orange-colored light;
Described first emergent light is through after the transmission region on optical surface array sensor 20, expose to surface of contact on imaging window protective seam 30 and human body finger 40 or human body palm (scheming not shown) upper after enter to imaging window protective seam 30, form the first incident light through imaging window protective seam 30 afterwards;
Optical surface array sensor 20 receives the first incident light, row relax of going forward side by side, and forms human body finger 40 fingerprint image or human body palmprint image.Particularly, can after the described incident light of reception, the light signal with image-forming information is converted to electric signal by photoelectric device, then processes described electric signal, obtains the fingerprint image corresponding with described human body finger 40 or human body palm.
In identification procedure, image-forming information collection can also be following implementation:
Secondary light source sends the second emergent light, and described second emergent light is near infrared light;
Described second emergent light is through after the transmission region on optical surface array sensor 20, expose to after on surface of contact on imaging window protective seam 30 and human body finger 40 or human body palm and enter to described imaging window protective seam 30, form the second incident light through described imaging window protective seam 30 afterwards;
Described optical surface array sensor 20 receives described second incident light, row relax of going forward side by side, and forms human body finger 40 vein blood vessel image or human body palm vein blood-vessel image.Particularly, can after the described incident light of reception, the light signal with image-forming information is converted to electric signal by photoelectric device, then processes described electric signal, obtains the vein blood vessel image corresponding with vein blood vessel, can realize better antifalse effect.
Wherein, identification apparatus is gate control system or mobile terminal or safe examination system or panel computer or PC etc., and optical imaging device of the present invention can apply on various identification apparatus, does not repeat at this.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (14)
1. for a backlight for optical imaging system, it is characterized in that, comprising:
Substrate;
Be located at the light source on described substrate, for launching emergent light, described light source comprises the first light source launching visible ray and the secondary light source launching near infrared light.
2. backlight as claimed in claim 1, it is characterized in that, described light source is side light source, is located at least one side of described substrate.
3. backlight as claimed in claim 1, it is characterized in that, described light source is backlight, is laid on described substrate.
4. backlight as claimed in claim 1, is characterized in that, in described first light source and secondary light source, one of them is located at least one side of described substrate, and another is laid on described substrate.
5. backlight as claimed in claim 1, is characterized in that, the visible ray that described first light source is launched is: the one in white light, purple light, cyan light, blue light, green light, sodium yellow, orange-colored light.
6. backlight as claimed in claim 2, is characterized in that, also comprise: be positioned at the reflection mating plate on described substrate;
Be positioned at the light guide plate on described reflection mating plate;
Be located at the diffusion barrier in described light guide plate, for diffused light source.
7. backlight as claimed in claim 3, is characterized in that, also comprise diffusion barrier or diffuser plate, be located on described backlight.
8. backlight as claimed in claim 1, is characterized in that, described backlight is LCD display panel or LED display panel or OLED display panel;
Described first light source, described secondary light source are located on the substrate of described LCD display panel or LED display panel or OLED display panel.
9. an optical imaging device, is characterized in that, comprising:
Backlight described in any one of claim 1-8;
Imaging window protective seam, for providing the surface of contact placing object;
Optical surface array sensor, the emergent light that the first light source in described backlight or secondary light source are launched is through after described optical surface array sensor and described imaging window protective seam, after irradiating the object be affixed on described imaging window protective seam, reflect to form incident light;
Described optical surface array sensor receives described incident light, and obtains the image-forming information corresponding with described object based on described incident light.
10. optical imaging device as claimed in claim 9, is characterized in that, the described object that described first light source or secondary light source irradiate is human body finger;
Described image-forming information is human body fingerprint imaging information or human body finger Arterography venography information;
Described first light source launches emergent light, and described image-forming information is human body fingerprint imaging information;
Described secondary light source launches emergent light, and described image-forming information is human body finger Arterography venography information.
11. optical imaging devices as claimed in claim 9, is characterized in that, the described object that described first light source or secondary light source irradiate is human body palm;
Described image-forming information is human body palmmprint image-forming information or human body palm vein blood vessel imaging information;
Described first light source launches emergent light, and described image-forming information is human body palmmprint image-forming information;
Described secondary light source launches emergent light, and described image-forming information is human body palm vein blood vessel imaging information.
12. 1 kinds of identification apparatus, is characterized in that, comprising: the optical imaging device described in any one of claim 9-11.
13. identification apparatus as claimed in claim 12, it is characterized in that, also comprise: optical imagery recognition system, described optical imagery recognition system comprises:
Storage unit, for prestoring user's image-forming information, described user's image-forming information comprises user fingerprints image-forming information and user's Arterography venography information;
Judging unit, compares with described user's image-forming information of storage for the image-forming information obtained by described optical imaging device, judges whether the image-forming information that optical imaging device obtains mates with described user's image-forming information of storage.
14. identification apparatus as claimed in claim 12, is characterized in that, described identification apparatus is gate control system or mobile terminal or safe examination system.
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| CN201410674651.9A CN104463107A (en) | 2014-11-21 | 2014-11-21 | Backlight plate, optical imaging device and identification equipment |
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| CN201410674651.9A CN104463107A (en) | 2014-11-21 | 2014-11-21 | Backlight plate, optical imaging device and identification equipment |
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| CN104463107A true CN104463107A (en) | 2015-03-25 |
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