CN104318204A - Fingerprint imaging system and method, fingerprint identification system, electronic apparatus - Google Patents
Fingerprint imaging system and method, fingerprint identification system, electronic apparatus Download PDFInfo
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- CN104318204A CN104318204A CN201410514060.5A CN201410514060A CN104318204A CN 104318204 A CN104318204 A CN 104318204A CN 201410514060 A CN201410514060 A CN 201410514060A CN 104318204 A CN104318204 A CN 104318204A
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- fingerprint
- light
- protective seam
- imaging
- window protective
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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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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/147—Details of sensors, e.g. sensor lenses
Abstract
The invention provides a fingerprint imaging system, a fingerprint imaging method, a fingerprint identification system and an electronic apparatus. The fingerprint imaging system includes an imaging window protective layer which is used for providing a contact surface of a human finger, a side light source which surrounds the imaging window protective layer and is used for emitting emergent light; the emergent light irradiates the contact surface and the human finger and then enters the imaging window protective layer, and then passes through the imaging window protective layer so as to form incident light, and an optical area array sensor which is located in a surface of the imaging window protective layer and is used for receiving the incident light, and obtaining fingerprint imaging information corresponding to the fingerprint of the human finger, wherein the surface of the imaging window protective layer is opposite to the contact surface. The fingerprint identification system and the electronic apparatus respectively comprise the fingerprint imaging system. The fingerprint imaging system, the fingerprint identification system and the electronic apparatus of the invention have the advantages of improved shock resistance and decreased size.
Description
Technical field
The present invention relates to fingerprint recognition field, particularly relating to a kind of fingerprint imaging system for realizing fingerprint recognition and method, fingerprint recognition system and electronic equipment.
Background technology
Fingerprint imaging recognition technology a kind ofly gathers the fingerprint image of human body by fingerprint sensor, then with system in existing fingerprint imaging information compare whether carry out correct judgment, and then realize the technology of identification.
The convenience of fingerprint imaging recognition technology due to use and the uniqueness of somatic fingerprint, be widely used in every field.The such as field of safety check such as public security bureau, customs, the gate control system and the consumer product area such as PC and mobile phone etc. of building.
The implementation of fingerprint imaging recognition technology has the multiple technologies such as optical imagery, capacitance imaging, ultrasonic imaging.Comparatively speaking, the imaging effect of optical image technology is relatively good, and equipment cost is relatively low, is thus widely applied.
With reference to figure 1, show the structural representation of a kind of optical fingerprint imaging system of prior art.Described optical fingerprint imaging system comprises:
Light source 10, for sending emergent light 11;
Identification window glass 12, for providing fingerprint recognition surface of contact, also for providing the reflecting surface making described emergent light 11 reflect.Particularly, when carrying out fingerprint recognition, human body finger 13 is positioned on identification window glass 12, and described emergent light 11 is irradiated on identification window glass 12, occurs to reflect and transmission at the surface of contact of human body finger 13 with identification window glass 12;
Optical focusing lens 15, for assembling the reflected light 16 that described emergent light 11 is formed on described identification window glass 12, makes described reflected light 16 focus on.
Optical surface array sensor assembly 14, for receiving the light after the convergence of described optical focusing lens 15, and carrying out opto-electronic conversion and signal transacting to the light after assembling, realizing the collection of fingerprint image.
Human body finger 13 reflects the fingerprint characteristic of human body with the surface of contact feature of identification window glass 12, and the feature of this surface of contact directly can affect the feature of reflected light 12, therefore, the image that optical surface array sensor assembly 14 collects directly reflects the feature of somatic fingerprint, thus can realize fingerprint recognition.
But, in optical fingerprint imaging system shown in Fig. 1, in order to obtain fingerprint image clearly, need strict control both optical condenser lens 15, relative position between optical surface array sensor assembly 14 and identification window glass 13, so that the image making optical surface array sensor assembly 14 collect is the picture that human body finger 13 is formed with the surface of contact of identification window glass 12, extraneous vibrations easily change optical focusing lens 15 (such as: external shock makes described optical focusing lens 15 move to dotted line position place), relative position between optical surface array sensor assembly 14 and identification window glass 3, therefore considerable influence is had to whole fingerprint imaging system.
Summary of the invention
The problem that the present invention solves is to provide a kind of fingerprint imaging system and method, fingerprint recognition system and electronic equipment, to improve the shock resistance of fingerprint imaging system.
In order to solve the technical problem, the invention provides a kind of fingerprint imaging system, for carrying out imaging to obtain fingerprint imaging information to the fingerprint of human body finger, described fingerprint imaging system comprises: imaging window protective seam, for providing the surface of contact placing human body finger; Side light source, arrange around described imaging window protective seam, for sending emergent light, described emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms incident light afterwards through described imaging window protective seam; Optical surface array sensor, is positioned on the opposite face of surface of contact described in described imaging window protective seam, for receiving described incident light, and obtains the fingerprint imaging information corresponding with the fingerprint of described human body finger based on described incident light.
Alternatively, described side light source is side emitting optical fiber.
Alternatively, described side light source comprises: light-transmission substrate; Be arranged at the light emitting diode in described light-transmission substrate.
Alternatively, described light-transmission substrate is quartz, glass or light-passing plastic.
Alternatively, the emergent light that described side light source sends is white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light, red light or near infrared light.
Alternatively, the mating shapes of described side light source and described imaging window protective seam.
Alternatively, described side light source is around the sphere shape light of described imaging window protective seam, elliptical light source, runway annular light source or polygon light source.
Alternatively, described side light source comprises a bright dipping position, for making described emergent light outgoing; Described bright dipping position is higher than the upper surface of described imaging window protective seam; Or, the upper surface flush of described bright dipping position and described imaging window protective seam; Or described bright dipping position is lower than the upper surface of described imaging window protective seam.
Alternatively, described bright dipping position is rectangular in shape on the cross section perpendicular to described imaging window protective seam, or described bright dipping position is circular arc on the cross section perpendicular to described imaging window protective seam.
Alternatively, described bright dipping position comprises an exiting surface, and described emergent light sends from described exiting surface; The exiting surface at described bright dipping position is arranged to the surface of contact smooth excessiveness with described imaging window protective seam.
Alternatively, the angle between described exiting surface and described surface of contact is in the scope of 100 ° ~ 170 °.
Alternatively, described bright dipping position is higher than the upper surface of described imaging window protective seam, and other positions that described side light source removes described exiting surface are all light tight.
Alternatively, described fingerprint imaging system also comprises: backlight, is arranged at the side that described optical surface array sensor is not provided with described imaging window protective seam; The emergent light that described side light source sends is that light outgoing after guiding that backlight sends is formed.
Alternatively, described imaging window protective seam is glass, sapphire or light-passing plastic.
Alternatively, the thickness of described imaging window protective seam is less than or equal to 0.5 millimeter.
Alternatively, described imaging window protective seam is optical fiber guide plate.
Alternatively, described optical surface array sensor is the cmos sensor be produced on wafer, or described optical surface array sensor is the amorphous silicon detector be produced on glass substrate, plastic base or stainless steel substrate, oxide-semiconductor sensor or low-temperature polysilicon silicon sensor.
Correspondingly, the invention provides a kind of fingerprint recognition system, comprising: fingerprint imaging system provided by the invention; Storage unit, for prestoring user fingerprints image-forming information; Judging unit, compare for fingerprint imaging information that described fingerprint imaging system is obtained and described user fingerprints image-forming information, judge whether the fingerprint imaging information that described fingerprint imaging system obtains mates with described user fingerprints information, to realize fingerprint recognition.
Correspondingly, the invention provides a kind of electronic equipment, comprise fingerprint imaging system provided by the invention.
Alternatively, described electronic equipment is mobile phone, panel computer, PC, access control equipment or rays safety detection apparatus.
Correspondingly, the invention provides a kind of fingerprint imaging method adopting fingerprint imaging system of the present invention, described fingerprint imaging method comprises: described side light source sends the first emergent light, and described first emergent light comprises at least one of white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light; Described first emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms the first incident light afterwards through described imaging window protective seam; Described optical surface array sensor receives described first incident light and to go forward side by side row relax, forms the fingerprint image of human body finger epidermis or shallow-layer skin.
Alternatively, described fingerprint imaging detection method also comprises: after formation epidermis or shallow-layer skin fingerprint image, described side light source sends the second emergent light, and described second emergent light comprises at least one of ruddiness or near infrared light; Described second emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms the second incident light afterwards through described imaging window protective seam; Described optical surface array sensor receives described second incident light and to go forward side by side row relax, forms the image of human finger deep skin or vein blood vessel; Based on the image of described finger deep skin or vein blood vessel and described epidermis or shallow-layer skin fingerprint image, obtain final deep skin or the image of vein blood vessel.
Compared with prior art, technical scheme of the present invention has the following advantages:
Fingerprint imaging system of the present invention is without the need to arranging optical focusing lens, therefore, without the need to arranging optical focusing lens, relative position between optical surface array sensor assembly and identification window glass in fingerprint imaging system, the object distance and image distance relation that meet required for sharply defined image is become to meet optical focusing lens, therefore, fingerprint imaging system shock resistance of the present invention is stronger.
In addition; in fingerprint imaging system of the present invention; optical surface array sensor is positioned on the opposite face of surface of contact described in described imaging window protective seam; that is; described optical surface array sensor and described imaging window protective seam fit; compared with an optical focusing lens of being also separated by between prior art optical surface array sensor with described imaging window protective seam, fingerprint imaging system structure of the present invention is compacter, volume reduce, more frivolous, be convenient to be applied in portable electronic equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of optical fingerprint imaging system of prior art;
Fig. 2 is the schematic diagram of fingerprint imaging system first embodiment of the present invention;
Fig. 3 is the vertical view of fingerprint imaging system shown in Fig. 2;
Fig. 4 is the schematic diagram of fingerprint imaging system second embodiment of the present invention;
Fig. 5 is the schematic diagram of fingerprint imaging system of the present invention 3rd embodiment;
Fig. 6 is the schematic diagram of fingerprint imaging system of the present invention 4th embodiment;
Fig. 7 is the schematic diagram of fingerprint recognition system one embodiment of the present invention.
Embodiment
In the fingerprint imaging system of prior art, optical focusing lens, optical surface array sensor assembly and the specific relative position relation of identification window glass demand fulfillment, extraneous vibrations easily change optical focusing lens, relative position between optical surface array sensor assembly and identification window glass, easily have an impact to whole fingerprint imaging system, shock resistance is excellent not.In addition, existing fingerprint imaging system volume ratio is larger.
In order to solve the technical problem, the invention provides a kind of fingerprint imaging system, for carrying out imaging to obtain fingerprint imaging information to the fingerprint of human body finger, described fingerprint imaging system comprises: imaging window protective seam, for providing the surface of contact placing human body finger; Side light source, arrange around described imaging window protective seam, for sending emergent light, described emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms incident light afterwards through described imaging window protective seam; Optical surface array sensor, is positioned on the opposite face of surface of contact described in described imaging window protective seam, for receiving described incident light, and obtains the fingerprint imaging information corresponding with the fingerprint of described human body finger based on described incident light.
Fingerprint imaging system of the present invention is without the need to arranging optical focusing lens, therefore, the specific relative position without the need to arranging optical focusing lens in fingerprint imaging system, between optical surface array sensor assembly and identification window glass, the object distance and image distance relation that meet required for sharply defined image is become to meet optical focusing lens, therefore, fingerprint imaging system shock resistance of the present invention is stronger.
In addition; in fingerprint imaging system of the present invention; optical surface array sensor is positioned on the opposite face of surface of contact described in described imaging window protective seam; that is; described optical surface array sensor and described imaging window protective seam fit; compared with an optical focusing lens of being also separated by between prior art optical surface array sensor with described imaging window protective seam, fingerprint imaging system structure of the present invention is compacter, volume reduce, more frivolous so that be applied in portable electronic equipment.
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.
In conjunction with referring to figs. 2 and 3, respectively illustrate side schematic view and the vertical view of fingerprint imaging system one embodiment of the present invention.Fingerprint imaging system of the present invention is used for carrying out imaging to obtain fingerprint imaging information to the fingerprint of human body finger, and described fingerprint imaging system comprises:
Imaging window protective seam 102, for providing the surface of contact placing human body finger 103.
In the present embodiment, described imaging window protective seam 102 is glass, and the upper surface of described glass is surface of contact, and when carrying out fingerprint imaging, human body finger 103 is positioned on the upper surface of described glass.
In addition; as shown in Figure 3, the protective seam of imaging window described in the present embodiment 102 is circular glass, and the shape of circular glass and human body finger 103 is comparatively close; can while realizing fingerprint imaging during fingerprint imaging the utilization factor of surface of contact higher, larger volume can not be occupied.But the present invention is not restricted this, in other embodiments, described imaging window protective seam 102 can also be square or other shapes.Such as, described imaging window protective seam 102 can also be oval, comparatively close with the shape of human body finger 102.
The material of the present invention to imaging window protective seam 102 does not also limit, and in other embodiments, the material of described imaging window protective seam 102 can also be optical fiber guide plate, sapphire, or can the plastics of printing opacity.
It should be noted that, because if imaging window protective seam 102 is too thick, imaging effect is poor, and imaging effect is difficult to meet design specification.Such as, the thickness of glass being used as imaging window protective seam 102 in the present embodiment is less than or equal to 0.5 millimeter, so that make the imaging effect of fingerprint imaging system reach acceptable level.Similarly, for the imaging window protective seam 102 of sapphire or plastic material, the thickness of described imaging window protective seam 102 is less than or equal to 0.5 millimeter, so that make the imaging effect of fingerprint imaging system meet design specification.And optical fiber guide plate being used as to the embodiment of imaging window protective seam 102, the thickness of the present invention to optical fiber guide plate is not restricted.
Fingerprint imaging system of the present invention also comprises: side light source 100; arrange around described imaging window protective seam 102; for sending emergent light 101; described emergent light 101 exposes to after on described surface of contact and described human body finger 103 and enters to described imaging window protective seam 102, forms incident light afterwards through described imaging window protective seam.
Particularly, when carrying out fingerprint imaging, being irradiated to the emergent light 101 of human body finger 103, by some light directive imaging window protective seam 102 of scattering after being incident upon human body finger 103, becoming incident light through imaging window protective seam 102 afterwards.
In addition, because human body finger 103 surface has rough fingerprint, also gap is formed with between the surface of contact of human body finger 103 and imaging window glass 102, emergent light 101 can also expose to human body finger 103 and imaging window glass 102 gap, afterwards by reflecting and reflecting directive imaging window glass 102, also become incident light through imaging window glass 102 afterwards.
The incident light that described two-part light correspondence is formed is with all directly related with the feature of human body finger 103 fingerprint, and described incident light embodies the finger print information of human body finger 103, provides possibility for realizing fingerprint imaging.
As shown in Figure 2, described side light source 100 comprises a bright dipping position 105, for making described emergent light outgoing; In the present embodiment; described bright dipping position is higher than the upper surface of described imaging window protective seam 102; the light out part protruding from described imaging window protective seam 102 upper surface can make most of outgoing luminous energy expose on human body finger 103; decrease the loss of emergent light, improve side light source send the utilization factor of light.
Alternatively, described side light source 100 except other positions at described bright dipping position 105 all light tight, to reduce the interference that other position bright dippings cause fingerprint imaging.
Described bright dipping position 105 comprises an exiting surface, and described emergent light sends from described exiting surface.In the present embodiment, the angle of described exiting surface and described surface of contact is in the scope of 100 ° ~ 170 °.Described angle is greater than 90 °; the surface of contact smooth excessiveness of the exiting surface at described bright dipping position 105 and described imaging window protective seam 102 can be made; when such human body finger 103 is placed on described surface of contact, the feel contacted with the exiting surface of described side light source 100 is better.
It should be noted that; in other embodiments; the exiting surface at described bright dipping position 105 can also adopt other mode to realize the surface of contact smooth excessiveness with described imaging window protective seam 102; thus the sense of touch of human body finger 103 when optimizing fingerprint detection, and then the use sense improving fingerprint imaging system user is subject to.Such as, the exiting surface at described bright dipping position 105 can be arranged to the arc-shaped with finger end mating shapes.
In the present embodiment, the mating shapes of described side light source 100 and described imaging window protective seam 102.Such side light source 100 can make full use of the space around imaging window protective seam 102, to provide abundant emergent light 101 to imaging window protective seam 102.Particularly, described side light source 100 is the sphere shape light around described imaging window protective seam 102.
In other embodiments; based on the change of described imaging window protective seam 102 shape; described side light source 100 can be the elliptical light source (situation corresponding to oval imaging window protective seam 102) around described imaging window protective seam 102; or described side light source 100 can also be the square light source (situation corresponding to square imaging window protective seam 102) around described imaging window protective seam 102.
In addition, described side light source 100 can also be the runway annular light source around described imaging window protective seam 102, or described side light source 100 can also be other polygon light sources of the rectangle light source etc. around described imaging window protective seam 102.
Please continue to refer to Fig. 2, side light source 100 described in the present embodiment is side emitting optical fiber, optical fiber small volume, can reduce the volume of fingerprint imaging system further.
But the present invention is not restricted this, in other embodiments, described side light source 100 can comprise: light-transmission substrate, is arranged at the light emitting diode in described light-transmission substrate.Wherein, described light-transmission substrate is quartz, glass or light-passing plastic.
In the present embodiment, the emergent light 101 that described side light source 100 sends is visible ray, and such as, the emergent light that described side light source sends is white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light, red light.Described optical surface array sensor 104 pairs of visible absorption effects are better, fingerprint imaging effect can be improved, but the present invention is not restricted this, described side light source 100 can also be the light source that can send near infrared light, the longer energy of near-infrared wavelength is lower, human eye is invisible, is not easy to cause too much impact to human eye.
Fingerprint imaging system of the present invention also comprises: optical surface array sensor 104; be positioned on the opposite face of surface of contact described in described imaging window protective seam 102; for receiving described incident light, and obtain the fingerprint imaging information corresponding with the fingerprint of described human body finger 103 based on described incident light.Particularly, be the situation of imageing sensor for optical surface array sensor 104, after the described fingerprint imaging information of acquisition, can also based on described fingerprint imaging information acquisition fingerprint image.
Optical surface array sensor 104 receives described incident light, and opto-electronic conversion is carried out to incident light, because described incident light embodies the finger print information of human body finger 103, after therefore incident light is converted to electric signal by described optical surface array sensor 104, fingerprint imaging information can be obtained.
Particularly, described optical surface array sensor 104 can be the cmos sensor be produced on wafer, or described optical surface array sensor 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.
With reference to figure 4, show the schematic diagram of fingerprint imaging system second embodiment of the present invention.The present embodiment part that is basically the same as those in the first embodiment repeats no more, and the difference of the present embodiment and the first embodiment is:
The light out part position of the side light source 200 of the present embodiment fingerprint imaging system is rectangular in shape structure on the cross section perpendicular to described imaging window protective seam.Because when fingerprint imaging system is integrated in fingerprint recognition system, described fingerprint recognition system is sandwich construction stacking from level to level, and the light out part surfacing of structure of right angle tyoe is convenient to realize the integrated of fingerprint imaging system.
As shown in Figure 4, the bright dipping position described in structure of right angle tyoe can send emergent light by top surface and side surface.
It should be noted that, the shape of the present invention to the light out part position of side light source in fingerprint imaging system 200 is not restricted, in other embodiments, in described fingerprint imaging system, the light out part position of side light source 200 can also be arc-shaped structure, the surface of arc-shaped structure is comparatively mellow and full, is not easy to sustain damage on the one hand when carrying out integrated assembling; Also can give the surface of contact that human body finger provides sense of touch good on the other hand, and then can optimizing user use sense be subject to.
With reference to figure 5, show the schematic diagram of fingerprint imaging system of the present invention 3rd embodiment.The something in common of the present embodiment and the second embodiment repeats no more, and the difference of the present embodiment and the second embodiment is:
In the present embodiment, the bright dipping position of side light source 300 and the upper surface flush of imaging window protective seam 301, in described side light source 300, the top surface at bright dipping position sends emergent light, to realize fingerprint imaging.The height of side light source 300 described in the present embodiment is less, and the space occupied is less, can reduce the volume of fingerprint imaging system further.
It should be noted that; in other embodiments; the upper surface at the bright dipping position in described side light source 300 can also lower than the upper surface of described imaging window protective seam 301; similarly; the top surface at described bright dipping position sends emergent light; to realize fingerprint imaging, the volume of fingerprint imaging system can be reduced so further.
With reference to figure 6, show the schematic diagram of fingerprint imaging system of the present invention 3rd embodiment.The present embodiment part that is basically the same as those in the first embodiment repeats no more; the difference of the present embodiment and the first embodiment is: the present embodiment fingerprint imaging system also comprises a backlight 401; be arranged at the side that described optical surface array sensor 402 is not provided with described imaging window protective seam 403, the emergent light that described side light source 400 sends is that light outgoing after guiding that backlight 401 sends is formed.
As shown in Figure 6, described side light source 400 is the light-transmission substrate in wedge shape on the cross section of vertical imaging window protective seam 403, and particularly, described light-transmission substrate can be quartz, glass or light-passing plastic.
Described side light source 400 can also arrange around described optical surface array sensor 402 and be positioned on backlight 401, wherein, described optical surface array sensor 402 is a light tight device, backlight 401 sends a part of light and is blocked by optical surface array sensor 402, in the region that backlight 401 contacts with described side light source 400, the light that backlight 401 sends can arrive the bright dipping position at side light source 400 top by described light-transmission substrate, and then realizes the outgoing of light.
In the present embodiment, side light source 400 can realize the outgoing of light by backlight 401, without the need to arranging separately a luminous component again, has good integration.
Correspondingly, the present invention also provides a kind of fingerprint recognition system, and with reference to figure 7, show the schematic diagram of fingerprint recognition system one embodiment of the present invention, described fingerprint recognition system comprises:
Fingerprint imaging system 501, for carrying out imaging to obtain fingerprint imaging information to the fingerprint of human body finger; Concrete scheme with reference to the content of each embodiment of fingerprint imaging system of the present invention, can not repeat them here.
Storage unit 502, for prestoring user fingerprints image-forming information; Particularly, fingerprint recognition system user can carry out fingerprint recognition when carrying out initial setting up, obtains user fingerprints image-forming information, the user fingerprints image-forming information obtained when described storage unit 502 is arranged for storing initial.
Judging unit 503, user fingerprints image-forming information for storing in the fingerprint imaging information that obtained by described fingerprint imaging system 501 and storage unit 502 compares, judge whether the fingerprint imaging information that described fingerprint imaging system obtains mates, to realize fingerprint recognition mutually with described user fingerprints information.Particularly, if fingerprint imaging information is not mated with described user fingerprints information, then represent user when the current user carrying out fingerprint detection not carries out initial setting up; If fingerprint imaging information and described user fingerprints information match, then represent that the current user carrying out fingerprint detection is user when carrying out initial setting up.
Fingerprint recognition system of the present invention comprises described fingerprint imaging system, and the shock resistance due to fingerprint imaging system of the present invention is strong and volume is little, and therefore fingerprint recognition system of the present invention also has the strong and advantage that volume is little of shock resistance.
Correspondingly, the present invention also provides a kind of electronic equipment, comprises fingerprint imaging system provided by the invention.The concrete scheme of fingerprint imaging system with reference to the content of each embodiment of fingerprint imaging system of the present invention, can not repeat them here.Described fingerprint imaging system is in the electronic device integrated, and because the shock resistance of fingerprint imaging system of the present invention is strong, therefore electronic equipment of the present invention also has the strong advantage of shock resistance when carrying out fingerprint recognition.In addition, the fingerprint imaging system small volume in electronic equipment of the present invention, therefore electronic equipment of the present invention is comparatively frivolous.
Particularly, described electronic equipment is mobile phone, panel computer, PC, access control equipment or rays safety detection apparatus etc.
Correspondingly, a kind of fingerprint imaging method adopting fingerprint imaging system of the present invention to carry out of the present invention, below in conjunction with the fingerprint imaging system shown in Fig. 2, be described fingerprint imaging method of the present invention, described fingerprint imaging method comprises:
Described side light source 100 sends the first emergent light, and described first emergent light comprises at least one of white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light;
Described first emergent light exposes to after on described surface of contact and described human body finger 103 and enters to described imaging window protective seam 102, forms the first incident light afterwards through described imaging window protective seam 102;
Described optical surface array sensor 104 receives described first incident light and to go forward side by side row relax, forms human body finger epidermis or shallow-layer skin fingerprint image.Particularly, after the described incident light of reception, light signal can be converted to electric signal, more described electric signal is processed, obtain the fingerprint image corresponding with described human body finger.
Because fingerprint imaging system of the present invention has good shock resistance, therefore, the fingerprint image that fingerprint imaging method of the present invention obtains can react the fingerprint of human body finger more truly, and the degree of accuracy of fingerprint sensing is higher.
In other embodiments of fingerprint imaging method, can also after described generation epidermis or shallow-layer skin fingerprint image, described side light source 100 sends the second emergent light, and described second emergent light comprises at least one of ruddiness or near infrared light;
Described second emergent light exposes to after on described surface of contact and described human body finger 103 and enters to described imaging window protective seam 102, forms the second incident light afterwards through described imaging window protective seam 102;
Described optical surface array sensor 104 receives described second incident light and to go forward side by side row relax, generates the image of finger deep skin or vein blood vessel;
Based on the image of described finger deep skin or vein blood vessel and described epidermis or shallow-layer skin fingerprint image, obtain final deep skin or the image of vein blood vessel.
The image adopting final deep skin or the vein blood vessel obtained in this way can get rid of the impact of epidermis or shallow-layer skin fingerprint, and then obtains the image of the higher deep skin of degree of accuracy or vein blood vessel, and can realize better antifalse effect.
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 (22)
1. a fingerprint imaging system, for carrying out imaging to obtain fingerprint imaging information to the fingerprint of human body finger, it is characterized in that, described fingerprint imaging system comprises:
Imaging window protective seam, for providing the surface of contact placing human body finger;
Side light source, arrange around described imaging window protective seam, for sending emergent light, described emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms incident light afterwards through described imaging window protective seam;
Optical surface array sensor, is positioned on the opposite face of surface of contact described in described imaging window protective seam, for receiving described incident light, and obtains the fingerprint imaging information corresponding with the fingerprint of described human body finger based on described incident light.
2. fingerprint imaging system as claimed in claim 1, it is characterized in that, described side light source is side emitting optical fiber.
3. fingerprint imaging system as claimed in claim 1, it is characterized in that, described side light source comprises:
Light-transmission substrate;
Be arranged at the light emitting diode in described light-transmission substrate.
4. fingerprint imaging system as claimed in claim 3, is characterized in that, described light-transmission substrate is quartz, glass or light-passing plastic.
5. fingerprint imaging system as claimed in claim 1, it is characterized in that, the emergent light that described side light source sends is white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light, red light or near infrared light.
6. fingerprint imaging system as claimed in claim 1, is characterized in that, the mating shapes of described side light source and described imaging window protective seam.
7. the fingerprint imaging system as described in claim 1 or 6, is characterized in that, described side light source is around the sphere shape light of described imaging window protective seam, elliptical light source, runway annular light source or polygon light source.
8. fingerprint imaging system as claimed in claim 1, it is characterized in that, described side light source comprises a bright dipping position, for making described emergent light outgoing;
Described bright dipping position is higher than the upper surface of described imaging window protective seam; Or,
The upper surface flush of described bright dipping position and described imaging window protective seam; Or,
Described bright dipping position is lower than the upper surface of described imaging window protective seam.
9. fingerprint imaging system as claimed in claim 8, it is characterized in that, described bright dipping position is rectangular in shape on the cross section perpendicular to described imaging window protective seam, or described bright dipping position is circular arc on the cross section perpendicular to described imaging window protective seam.
10. fingerprint imaging system as claimed in claim 8, it is characterized in that, described bright dipping position comprises exiting surface, and described emergent light sends from described exiting surface; The exiting surface at described bright dipping position is arranged to the surface of contact smooth excessiveness with described imaging window protective seam.
11. fingerprint imaging systems as claimed in claim 10, is characterized in that, the angle between described exiting surface and described surface of contact is in the scope of 100 ° ~ 170 °.
12. fingerprint imaging systems as claimed in claim 8, it is characterized in that, described bright dipping position comprises exiting surface, and described emergent light sends from described exiting surface; Described bright dipping position is higher than the upper surface of described imaging window protective seam, and other positions that described side light source removes described exiting surface are all light tight.
13. fingerprint imaging systems as claimed in claim 1, it is characterized in that, described fingerprint imaging system also comprises: backlight, is arranged at the side that described optical surface array sensor is not provided with described imaging window protective seam;
The emergent light that described side light source sends is that light outgoing after guiding that backlight sends is formed.
14. fingerprint imaging systems as claimed in claim 1, it is characterized in that, described imaging window protective seam is glass, sapphire or light-passing plastic.
15. fingerprint imaging systems as described in claim 1 or 14, it is characterized in that, the thickness of described imaging window protective seam is less than or equal to 0.5 millimeter.
16. fingerprint imaging systems as claimed in claim 1, it is characterized in that, described imaging window protective seam is optical fiber guide plate.
17. fingerprint imaging systems as claimed in claim 1, it is characterized in that, described optical surface array sensor is the cmos sensor be produced on wafer, or described optical surface array sensor is the amorphous silicon detector be produced on glass substrate, plastic base or stainless steel substrate, oxide-semiconductor sensor or low-temperature polysilicon silicon sensor.
18. 1 kinds of fingerprint recognition systems, is characterized in that, comprising:
Fingerprint imaging system as described in any one of claim 1 ~ 17 claim;
Storage unit, for prestoring user fingerprints image-forming information;
Judging unit, compare for fingerprint imaging information that described fingerprint imaging system is obtained and described user fingerprints image-forming information, judge whether the fingerprint imaging information that described fingerprint imaging system obtains mates with described user fingerprints information, to realize fingerprint recognition.
19. 1 kinds of electronic equipments, is characterized in that, comprise the fingerprint imaging system as described in any one of claim 1 ~ 17 claim.
20. electronic equipments as claimed in claim 19, it is characterized in that, described electronic equipment is mobile phone, panel computer, PC, access control equipment or rays safety detection apparatus.
The fingerprint imaging method of the fingerprint imaging system of 21. 1 kinds of employings as described in claim 1 ~ 17, it is characterized in that, described fingerprint imaging method comprises:
Described side light source sends the first emergent light, and described first emergent light comprises at least one of white light, purple light, indigo coloured light, blue light, green light, sodium yellow, orange-colored light;
Described first emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms the first incident light afterwards through described imaging window protective seam;
Described optical surface array sensor receives described first incident light and to go forward side by side row relax, forms the fingerprint image of human body finger epidermis or shallow-layer skin.
22. fingerprint imaging methods as claimed in claim 21, it is characterized in that, described fingerprint imaging detection method also comprises:
After formation epidermis or shallow-layer skin fingerprint image, described side light source sends the second emergent light, and described second emergent light comprises at least one of ruddiness or near infrared light;
Described second emergent light exposes to after on described surface of contact and described human body finger and enters to described imaging window protective seam, forms the second incident light afterwards through described imaging window protective seam;
Described optical surface array sensor receives described second incident light and to go forward side by side row relax, forms the image of human finger deep skin or vein blood vessel;
Based on the image of described finger deep skin or vein blood vessel and described epidermis or shallow-layer skin fingerprint image, obtain final deep skin or the image of vein blood vessel.
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| CN201410514060.5A CN104318204A (en) | 2014-09-29 | 2014-09-29 | Fingerprint imaging system and method, fingerprint identification system, electronic apparatus |
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| CN201410514060.5A CN104318204A (en) | 2014-09-29 | 2014-09-29 | Fingerprint imaging system and method, fingerprint identification system, electronic apparatus |
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