CN108629253A - Fingeprint distinguisher - Google Patents
Fingeprint distinguisher Download PDFInfo
- Publication number
- CN108629253A CN108629253A CN201710183302.0A CN201710183302A CN108629253A CN 108629253 A CN108629253 A CN 108629253A CN 201710183302 A CN201710183302 A CN 201710183302A CN 108629253 A CN108629253 A CN 108629253A
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- CN
- China
- Prior art keywords
- light
- image sensing
- sensing chip
- fingeprint distinguisher
- refractive power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
-
- 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
- G06V40/1341—Sensing with light passing through the finger
Abstract
The present invention discloses a kind of fingeprint distinguisher, including a cover board, an image sensing chip, a light guide, at least an illuminating part, a collimation part and a refractive power part.Image sensing chip is located at the side of cover board；Light guide is provide with image sensing chip and includes an incidence surface and a light-emitting surface, which is provided with a micro-structure；Illuminating part is arranged adjacently to incidence surface.Part is collimated between light-emitting surface and image sensing chip, refractive power part is located between collimation part and image sensing chip and includes multiple light refractive structures；The outer diameter of light refractive structures is gradually increased with the angle far from collimation part one wedge angle of tapered formation, these wedge angles with the center line far from refractive power part.
Description
Technical field
The present invention relates to the devices for reading or recognizing pattern, and more particularly to a kind of fingeprint distinguisher.
Background technology
Identification of fingerprint technology is widely used in various electronics because having good antitheft and individual privacy defencive function
In device, to prevent electronic device from being usurped.
The size Main Basiss of image sensing chip in the past, fingeprint distinguisher by sensing region size and
It is fixed.More specifically, smaller by sensing region, then the size of image sensing chip is also smaller；Conversely, it is bigger by sensing region,
Then the size of image sensing chip is also bigger, and the size of image sensing chip can be identical to the size by sensing region, use
Improve the analytic ability of image sensing chip.However, large-sized image sensing chip has the shortcomings that high cost and large volume.
Invention content
The purpose of the present invention is to provide a kind of fingeprint distinguisher, can reduce the size of image sensing chip to reach
To the effect for reducing cost.
A kind of fingeprint distinguisher provided by the invention has a finger sensing area and includes a cover board, an image sense
Survey chip, a light guide, at least an illuminating part, a collimation part and a refractive power part.Image sensing chip is located at the side of cover board；It leads
Light part is provide with image sensing chip and includes an incidence surface and a light-emitting surface, and light-emitting surface is provided with a micro-structure；Illuminating part is arranged
It is adjacent to incidence surface.Part is collimated between light-emitting surface and image sensing chip, refractive power part is located at collimation part and image sensing core
Between piece and include multiple light refractive structures；The outer diameter of the light refractive structures collimates part one wedge angle of tapered formation, and institute with separate
The angle for stating the wedge angle of light refractive structures is gradually increased with the center line far from refractive power part.
In one embodiment of the present invention, image sensing chip include multiple sensor pixels, when image sensing chip in
The length on cross section that the optical axis of the sensor pixel is constituted is a, and finger sensing area is b in the length on cross section
When, meet following condition：b≥2a.
In one embodiment of the present invention, the quantity of the sensor pixel is identical to the quantity of the light refractive structures
In one embodiment of the present invention, the sensor pixel is less than the quantity of the light refractive structures.
In one embodiment of the present invention, fingeprint distinguisher further includes multiple lenticules, lenticule difference
On the sensor pixel.
In one embodiment of the present invention, collimation part includes multiple light shielding parts and multiple transmittance sections, the light shielding part
And the transmittance section is in be staggered, and the transmittance section corresponds to the light refractive structures and is arranged.
In one embodiment of the present invention, refractive power part further includes a base portion, and the light refractive structures are set on base portion, and
The outer diameter of the light refractive structures is pointed at far from base portion is tapered.
In one embodiment of the present invention, the outer surface of light refractive structures is a flat surface or a curved surface.
In one embodiment of the present invention, fingeprint distinguisher further includes a finishing type part, is set to light-emitting surface and collimation
Between part.
In one embodiment of the present invention, fingeprint distinguisher further includes one first adhesion part and the second adhesion part, the
One adhesion part is set between cover board and light-emitting surface, and the second adhesion part is set between light-emitting surface and collimation part.
The present invention, come the angle for the reflected beams generated in finger sensing area of transferring, makes by the light refractive structures of refractive power part
The size of image sensing chip is reduced, and achievees the effect that reduce cost.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Description of the drawings
Fig. 1 is painted the vertical view of the digital electron device according to first embodiment of the invention；
Fig. 2 is painted the sectional view of the fingeprint distinguisher according to first embodiment of the invention；
Fig. 3 is painted according to the collimation part of first embodiment of the invention and the sectional view of refractive power part；
Fig. 4 is painted the sectional view of the fingeprint distinguisher according to second embodiment of the invention；And
Fig. 5 is painted according to the collimation part of second embodiment of the invention and the sectional view of refractive power part.
Reference numeral
1 digital electron device
10 shells
11 screens
12 fingeprint distinguishers
123 finger sensing areas
124 substrates
1240 upper surfaces
126 cover boards
1260 inner surfaces
1262 outer surfaces
128 image sensing chips
1280 sensor pixels
1282 electrodes
130 illuminating parts
132 light guides
1320 light in part
1321 incidence surfaces
1322 light guide sections
1323 light-emitting surfaces
1324 micro-structures
1326 grooves
133 accommodating spaces
134 collimation parts
1340 light shielding parts
1342 transmittance sections
136 refractive power parts
1360 base portions
1362 light refractive structures
137 conducting wires
138 finishing type parts
139 adhesive agents
140 first adhesion parts
142 second adhesion parts
144 lenticules
C center lines
I optical axises
Specific implementation mode
Fig. 1 is referred to, the vertical view of the digital electron device according to first embodiment of the invention is painted.Digital and electronic
Device 1 can be an intelligent telephone, a plate computer, PC, personal digital assistant, media player and other static
And portable electronic device；Digital electron device 1 includes a shell 10, a screen 11 and a fingeprint distinguisher 12；Screen 11
And fingeprint distinguisher 12 is exposed to respectively outside shell 10, screen 11 to display information to user viewing and for user with
The mode of touch-control operates；Fingeprint distinguisher 12 uses increase number to execute finger print identifying function to the identity of user
The safety in utilization of electronic device 1.
Fig. 2 is referred to, the sectional view of the fingeprint distinguisher according to first embodiment of the invention, section view position are painted
It is set to along line segment 2 shown in FIG. 1.Fingeprint distinguisher 12 have a finger sensing area 123, finger sensing area 123 it is big
The small fingerprint for being set to capture fingers of single hand.In fig. 2, fingeprint distinguisher 12 includes a cover board 126, an image sensing
Chip 128, at least an illuminating part 130, a light guide 132, one collimation part 134 and a refractive power part 136, wait cooperations pickup to use
The finger print information of person is simultaneously authenticated finger print information.
Cover board 126 has an inner surface 1260 and an outer surface 1262, and inner surface 1260 is opposite with outer surface 1262, and outer
Surface 1262 is the touch operation surface of fingeprint distinguisher 12；In other words, user touches the outer surface of cover board 126 with its finger
1262, to carry out fingerprint pickup and certification.Cover board 126 can be with high mechanical properties and high-penetration rate substrate (such as：Glass
Substrate), high mechanical properties because of the pressing of finger or other external impacts mainly with to avoid damageeing positioned at the lower section of cover board 126
Element, high-penetration rate then can avoid masking come self-luminous piece 130 light beam.
Image sensing chip 128 is located at the side of cover board 126, is adapted to be received in finger sensing area 123 and is reflected by finger
Light beam produced by finger print information and finger print information is authenticated.Image sensing chip 128 can be mounted on the upper table of substrate 124
Face 1240, and by being connected across the electrode 1282 (as shown in Figure 3) of image sensing chip 128 and the conducting wire 137 of upper surface 1240
And it is electrically connected with the wiring (not shown) on substrate 124；Finger print information authentication result can be by being formed in base
Wiring on plate 124 is transferred to screen 11 to be shown.Image sensing chip 128 may include a charge coupled cell
(Charge-Coupled Device；Abbreviation CCD) or a complementary metal oxide semiconductor (Complementary Metal
Oxide Semiconductor；Abbreviation CMOS) element.
As shown in Figure 1, image sensing chip 128 can be rectangular, and may include lining up an array spaced apart to each other thereon
Multiple sensor pixels 1280 (as shown in Figure 3)；Wherein, sensor pixel 1280 is suitable for receiving is referred to by light beam that finger reflects and generation
Line information.
There is each sensor pixel 1280 an optical axis I, the optical axis I of all sensor pixels 1280 to be arranged on a cross section
(such as section view along line segment 2 shown in FIG. 1)；When length of the image sensing chip 128 on aforementioned cross-sectional is a, finger sense
Region 123 is surveyed when the length on aforementioned cross-sectional is b, meets following condition：
b≥2a。
Illuminating part 130 is set to the upper surface 1240 of substrate 124, and by image sensing chip 128.Fig. 2 is schematically
Two illuminating parts 130 are painted, and two illuminating parts 130 are arranged respectively at the left and right sides of image sensing chip 128；In practical reality
Shi Shi, the quantity of illuminating part 130 and its waits the relative configuration relationship with image sensing chip 128 to be not limited to Fig. 2 illustrated,
And fingeprint distinguisher 1 includes multiple illuminating parts 130, these illuminating parts 130, which can be for example, is angularly located at image sensing core
By piece 128.Illuminating part 130 is suitable for sending out light beam towards an incidence surface 1321 of light guide 132.Illuminating part 130 may be, for example, luminous
Diode, and for generating non-visible light beam (such as infrared beam).
132 light-permeable of light guide is set between substrate 124 and cover board 126 and is provide with image sensing chip 128；It is guide-lighting
Part 132 can also direct and be reflected by finger other than it can guide the light beam that illuminating part 130 generates to finger sensing area 123
Light beam (hereinafter referred to as reflection light), so that the reflected beams is transferred to image sensing chip by collimating part 134 and refractive power part 136
128。
In fig. 2, light guide 132 is made using the material of high-penetration rate, and includes that a light in part 1320, one is guide-lighting
Portion 1322 and multiple micro-structures 1324.Light in part 1320 can be in ring-like, and one end is connected to light guide section 1322, and the other end is set to base
The upper surface 1240 of plate 124.As shown in Fig. 2, the incidence surface 1321 of light in part 1320 can be formed with the side towards light guide section 1322
To multiple grooves 1326 of recess, so that illuminating part 130 is located in the light beam entrance for wherein using and increasing illuminating part 130 and sending out
The probability of light in part 1320.The quantity of groove 1326 is identical to the quantity of illuminating part 130.Light in part 1320 is set on substrate 124,
It is stood on substrate 124 to support light guide section 1322 with certain distance, image sensing chip 128, collimation part 134 and refractive power
Part 136 is located at substrate 124, light in part 1320 and light guide section 1322 and coordinates in the accommodating space 133 defined.
Further, the outer diameter of light in part 1320 makes leaded light with being gradually reduced from substrate 124 toward the direction of cover board 126
The side section view of part 132 is substantially in ladder type；Thereby, the light beam for allowing illuminating part 130 to send out can be enable to be transferred to finger sensing area
Domain 123.In the present invention, light in part 1320 and light guide section 1322 can be integrally formed；The top surface of light guide section 1322 can pass through one
First adhesion part 140 and the inner surface 1260 for being attached at cover board 126.First adhesion part 140 is transparent, and its refractive index can example
Such as it is the same as the refractive index of cover board 126.
Light guide 132 further includes a light-emitting surface 1323, is surface of the light guide section 1322 far from cover board 126；In this implementation
In mode, the normal direction of light-emitting surface 1323 is parallel to the normal direction of incidence surface 1321.Micro-structure 1324 is set to light-emitting surface
1323, and micro-structure 1324 can be one of the forming with light guide section 1322.As shown in Fig. 2, micro-structure 1324 can be by light-emitting surface
The laciniation of 1323 recessed light guide sections 1322；In actual implementation, micro-structure 1324 is also not excluded for protrude from out
Laciniation, column structure or the prism structure of smooth surface 1323.
Illuminating part 130 and the cooperation of light guide 132 generate the light beam for being transferred to finger sensing area 132；Illuminating part 130 generates
Light beam mainly via incidence surface 1321 enter light in part 1320, then be transferred to light guide section 1322；Wherein, into light guide section
1322 light propagation path has two：One is directly transferred to by cover board 126 positioned at finger sense after the refraction of light guide section 1322
User's finger in region 123 is surveyed, it is another, in being transmitted back and forth in light guide section 1322 in a manner of total internal reflection, until micro- knot
Structure 1324 makes the angle of propagation of light beam less than the critical angle of total internal reflection, and light beam is just able to be transferred to positioned at finger by cover board 126
User's finger in sensing region 123.It is professed, micro-structure 1324 is inhibiting light beam constantly being led in a manner of total internal reflection
It is transmitted in light portion 1322.It is emitted by light-emitting surface 123 by the light beam (i.e. the reflected beams) that finger reflects, and sequentially by collimating part
134 and refractive power part 136 be transferred to image sensing chip 128.
Collimation part 134 is located between the light-emitting surface 1323 and image sensing chip 128 of light guide 132, and can pass through one the
Two adhesion parts 142 and be attached at light guide 132.The length of finger sensing area 123 can be approximately identical to the length of collimation part 134
Degree.Collimation part 134 can touch the bottom end of micro-structure 1324 just, to avoid the reflected beams after by light guide section 1322, directly
It connects and is transferred to substrate 124 (imply that and be not transferred to substrate 124 by collimating part 134 and refractive power part 136), cause image sensing core
The bad problem of the contrast and image quality of piece 128.In addition, when the second adhesion part 142 is attached to micro-structure 1324, in addition to
Allow micro-structure 1324 that light beam can not be inhibited to be transmitted in light guide section 1322 in a manner of total internal reflection, it is also possible to allow part without
The light beam of finger reflection reflects downwards and is transferred to image sensing chip 128, and image sensing chip 128 is allowed to generate wrong finger
Line information.Therefore, it in assembling, should avoid attached the second adhesion part 142 that part 134 is fixed on light guide 132 will be collimated
It in micro-structure 1324；In fig. 2, the second adhesion part 1324 is set to the position that light in part 1320 is adjacent to light-emitting surface 1323.The
Two adhesion parts 142 can be for example in optic-solidified adhesive (such as ultraviolet cured adhesive).
Collimation part 134 is for limiting the light incident area that the reflected beams being emitted by light-emitting surface 1323 are transmitted to refractive power part 136.
Fig. 3 is referred to, collimation part 134 includes multiple light shielding parts 1340 and multiple transmittance sections 1342, and transmittance section 1342 is arranged in adjacent two
Between light shielding part 1340；In other words, light shielding part 1340 and transmittance section 1342 are in be staggered.
In the reflected beams, it can be stopped by the light shielding part 1340 for being arranged in 1342 both sides of transmittance section with large angle incidence person
And it can not be transferred to refractive power part 136, and refractive power part 136 directly can be transferred to by transmittance section 1342 with low-angle incidence person.
This, definition is collimated light beam by collimating the light beam of part 134.In addition, the quantity of transmittance section 1342 makes to be identical to sensing through design
The quantity of pixel 1280 implies that the collimated light beam by single transmittance section 1342 with so that single sensor pixel 1280 generates fingerprint
Information；Furthermore the length L of the adjustment collimation part 134 and bore ψ of transmittance section 1342, can adjust collimated light beam and be transmitted to refractive power
The light incident area of part 136.
Refractive power part 136 is set between collimation part 134 and image sensing chip 128, and is spaced on image sense with one
Survey 128 top of chip.Refractive power part 136 receives collimated light beam, and to will be by the collimated beam of transmittance section 1342 in shadow
As the sensor pixel 1280 of sensor chip 128.The thickness T of refractive power part 136 can be 50~200 microns.
In figure 3, refractive power part 136 includes a base portion 1360 and multiple light refractive structures 1362；Base portion 1360 is a light transmission piece,
It can be attached at collimation part 134 by adhesive agent 139, and can be for example with polyethylene terephthalate (polyethylene
terephthalate；Abbreviation PET) etc. high molecular materials be made.Light refractive structures 1362 are set on substrate 1360, and outside it
Diameter is with one wedge angle of tapered formation far from base portion 1360；Light refractive structures 1362 can be for example made by optic-solidified adhesive.Refractive power
The outer surface of structure 1362 is plane.
The quantity of light refractive structures 1362 is identical to the quantity of sensor pixel 1280, the angle of the wedge angle of light refractive structures 136 with
It the center line C far from refractive power part 136 and gradually increases, to make the collimated light beam turnover of the center line C far from refractive power part 136 big
Angle post-concentration is in corresponding sensor pixel 1280, and the collimated light beam turnover low-angle of the center line C of close refractive power part 136
Post-concentration is in corresponding sensor pixel 1280.
Synthesis is aforementioned, and in the fingeprint distinguisher of the present invention, the light beam that illuminating part 130 generates is entered by incidence surface 1321
Light guide 132 is simultaneously transferred to finger sensing area 123；The reflected beams caused by aforementioned light are reflected by user's finger sequentially to lead to
Light-emitting surface 1323, collimation part 134 and the focusing of refractive power part 136 are crossed in the sensor pixel 1280 of image sensing chip 128.Wherein, lead to
The present invention is crossed by the light refractive structures 1362 on refractive power part 136, thus it is possible to vary the collimated light beam by collimating part 134 is incident on sense
The angle for surveying pixel 1280 achievees the effect that the length for reducing image sensing chip 128.
Fig. 4 is referred to, the sectional view of the fingeprint distinguisher according to second embodiment of the invention is painted.Fig. 4 is painted
The fingeprint distinguisher 12 shown is applied in digital electron device 1 as shown in Figure 1, to execute fingerprint to the identity of user
Authentication function achievees the effect that increase by 1 safety in utilization of digital electron device.
Fingeprint distinguisher 12 is set to a upper surface 1240 of a substrate 124, and finger print information to pick up and to referring to
Line information is authenticated.Fingeprint distinguisher 12 includes a cover board 126, an image sensing chip 128, multiple illuminating parts 130, one
Light guide 132, one collimates part 134 and a refractive power part 136.
One outer surface 1262 of cover board 126 is the touch operation surface of fingeprint distinguisher 12；User is touched with its finger
Outer surface 1262, to carry out fingerprint pickup and certification.
Image sensing chip 128 is located at the side of cover board 126, suitable for being received in a finger sensing area 123 by finger
The light beam (hereinafter referred to as the reflected beams) of reflection is to generate finger print information and be authenticated.Image sensing chip 128 is mounted on substrate
124 1 upper surfaces 1240.
Image sensing chip 128 is rectangular (as shown in Figure 1), and may include lining up the more of an array spaced apart to each other thereon
A sensor pixel 1280, as shown in Figure 5；Sensor pixel 1280 is suitable for receiving by light beam that fingerprint reflects and generates finger print information.
Each sensor pixel 1280 has an optical axis I, and the optical axis I of all sensor pixels 1280 is arranged on a cross section (such as along Fig. 1
Shown in line segment 2 section view)；When length of the image sensing chip 128 in cross section above-mentioned is a, finger sensing area 123 exists
When the length of cross section above-mentioned is b, meet following condition：
b≥2a。
Illuminating part 130 is set on substrate 124, and by the image sensing chip 128, equal to be suitable for towards light guide 132
An incidence surface 1321 send out non-visible light beam.
132 light-permeable of light guide is set between substrate 124 and cover board 126 and is provide with image sensing chip 128；It is guide-lighting
Part 132 includes a light in part 1320, a light guide section 1322 and multiple micro-structures 1324.Light in part 1320 is in ring-like, and its outer diameter
With being gradually reduced from substrate 124 toward the direction of cover board 126, to allow the light beam that illuminating part 130 is sent out to be able to be transferred to finger
Sensing region 123.One end of light in part 1320 is connected to light guide section 1322, and the other end is set to the upper surface 1240 of substrate 124 simultaneously
Including incidence surface 1321；Multiple grooves 1326 can be formed in incidence surface 1321 so that illuminating part 130 is located in wherein, and using makes hair
The light beam that light part 130 generates is able to be transferred to light guide section 1322.Substrate 124, light in part 1320 and the cooperation of light guide section 1322 are defined
An accommodating space 133 for image sensing chip 128, collimation part 134 and refractive power part 136 be located in wherein.Light guide section 1322
Top surface an inner surface 1260 of cover board 126 can be attached at by one first adhesion part 140.
Micro-structure 1324 is formed in light-emitting surface 1323, and to inhibit the light for being transferred to light guide section 1322 by light in part 1320
Beam is constantly in a manner of total internal reflection in transmission in light guide section 1322；Micro-structure 1324 can be the zigzag of recessed light-emitting surface 1323
Structure.
Illuminating part 130 and the cooperation of light guide 132 generate the light beam for being transferred to finger sensing area 132；Illuminating part 130 generates
Light beam light guide section 1322 is entered by incidence surface 1321, wherein having two into the light propagation path of light guide section 1322：It is always
The finger that user is transferred to by cover board 126 after the refraction of light guide section 1322 is connect, it is another, in leading in a manner of total internal reflection
It is transmitted back and forth in light portion 1322, until micro-structure 1324 makes the angle of propagation of light beam less than the critical angle of total internal reflection, light beam just obtains
To be transferred to the finger of user by cover board 126.It is emitted by light-emitting surface 123 by the light beam (i.e. the reflected beams) that finger reflects,
And sequentially image sensing chip 128 is transferred to by collimating part 134 and refractive power part 136.
Herein it should be particularly noted that, the angle of the micro-structure 1324 depicted in Fig. 5 is less than the micro-structure depicted in Fig. 2
1324 angle, it is available so that the reflected beams of large angle incidence get enter into collimation part 134.
Collimation part 134 is located between the light-emitting surface 1323 and image sensing chip 128 of light guide 132, and can pass through one the
Two adhesion parts 142 and be attached at light guide 132；Wherein, the second adhesion part 142 is set to micro- knot of collimation part 134 and light guide 132
Between structure 1324, the second adhesion part 142 can be for example in optic-solidified adhesive.
Collimation part 134 may include staggered for limiting the light incident area that the reflected beams are transmitted to refractive power part 136
Multiple light shielding parts 1340 and multiple transmittance sections 1342 (as shown in Figure 5).Light shielding part 1340 is therein to prevent wide-angle from injecting
The reflected beams are transferred to refractive power part 136, transmittance section 1342 then for low-angle be incident in the reflected beams therein by by be transferred to
Refractive power part 136.Here, definition is collimated light beam by collimating the light beam of part 134.
Refractive power part 136 is located between collimation part 134 and image sensing chip 128, and is spaced on image sense with one
Survey 128 top of chip；Refractive power part 136 receives collimated light beam, and assembles collimated light beam in each sensing of image sensing chip 128
Pixel 1280.
Refractive power part 136 includes a base portion 1360 and multiple light refractive structures 1362；Base portion 1360 is a light transmission piece, can be passed through
Adhesive agent 139 and be attached at collimation part 134 bottom.Light refractive structures 1362 are set on substrate 1360, and its outer diameter is with separate
One wedge angle of tapered formation of base portion 1360.In Figure 5, the outer surface of light refractive structures 1362 is a curved surface；Wherein, curved design can be into
Expand to one step it and is directed at the turning angle of collimated optical beam.
The quantity of light refractive structures 1362 is identical to the quantity of transmittance section 1342, and light refractive structures 1362 correspond to transmittance section
1342 settings, to receive the collimated light beam by transmittance section 1342.The angle of the wedge angle of light refractive structures 136 is with far from refractive power part
136 center line C and gradually increase, with allow the center line C far from refractive power part 136 collimated light beam turnover wide-angle post-concentration in
Sensor pixel 1280, and low-angle post-concentration is transferred in sensor pixel close to the collimated light beam of the center line C of refractive power part 136
1280, to achieve the effect that reduce the length of image sensing chip 128.In the present embodiment, the quantity of sensor pixel 1280
Less than the quantity of light refractive structures 1362；In other words, single a sensor pixel 1280 is acceptable from multiple light refractive structures 1362
Light beam.For example, in Figure 5, each sensor pixel 1280 is subjected to the light beam from three light refractive structures 1362 and generation
Finger print information is to be authenticated.
In addition, fingeprint distinguisher 12 can also include a finishing type part 138 and multiple lenticules 144；Finishing type part 138
Between the second adhesion part 142 and collimation part 134, the reflected beams will enter collimation part 134 carry out integer, such as allow
Enter the reflected beams of light shaping part 138 with wide-angle and collimation part 134 is emitted to low-angle.Lenticule 144 is set to each sense
It surveys in pixel 1280, will further focus on sensor pixel 1280 by the light beam of refractive power part 136, to improve sensing effect
Fruit.
Synthesis is aforementioned, and in the fingeprint distinguisher of the present invention, the light beam that illuminating part 130 generates is entered by incidence surface 1321
Light guide 132 is simultaneously transferred to finger sensing area 123；The reflected beams caused by aforementioned light are reflected by user's finger sequentially to lead to
Light-emitting surface 1323, light shaping part 138, collimation part 134 and the focusing of refractive power part 136 are crossed in the sensor pixel of image sensing chip 128
1280.Wherein, the light refractive structures 1362 on refractive power part 136 through the invention, thus it is possible to vary by the collimated light for collimating part 134
Beam is incident on the angle of sensor pixel 1280, thereby can reach the effect for the length for reducing image sensing chip 128.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (10)
1. a kind of fingeprint distinguisher, there is a finger sensing area, which is characterized in that the fingeprint distinguisher includes：
One cover board；
One image sensing chip is located at the side of the cover board；
One light guide is provide with the image sensing chip, which includes an incidence surface and a light-emitting surface, which is provided with
One micro-structure；
An at least illuminating part is arranged adjacently to the incidence surface；
One collimation part, between the light-emitting surface and the image sensing chip；And
One refractive power part is set between the collimation part and the image sensing chip, and includes multiple light refractive structures, multiple refractive power knot
The outer diameter of structure with far from the collimation part one wedge angle of tapered formation, and the angle of multiple wedge angle of multiple light refractive structures with
Far from the refractive power part center line and gradually increase.
2. fingeprint distinguisher as described in claim 1, which is characterized in that the image sensing chip includes multiple sensing pictures
Element, when the image sensing chip is a, finger sensing in the length on the cross section that the optical axis of multiple sensor pixel is constituted
Region meets following condition when the length of the cross section is b：
b≥2a。
3. fingeprint distinguisher as claimed in claim 2, which is characterized in that it is more that the quantity of multiple sensor pixel is identical to this
The quantity of a light refractive structures.
4. fingeprint distinguisher as claimed in claim 2, which is characterized in that the quantity of multiple sensor pixel is less than multiple
The quantity of light refractive structures.
5. fingeprint distinguisher as claimed in claim 2, which is characterized in that further include multiple lenticules, it is more to be respectively arranged on this
On a sensor pixel.
6. fingeprint distinguisher as described in claim 1, which is characterized in that the collimation part includes multiple light shielding parts and multiple
Light portion, multiple light shielding part and multiple transmittance section are staggered, and multiple transmittance section corresponds to multiple light refractive structures setting.
7. fingeprint distinguisher as described in claim 1, which is characterized in that the refractive power part further includes a base portion, multiple folding
Photo structure is set to the base portion, and respectively the outer diameter of the light refractive structures is with far from the tapered formation wedge angle of the base portion.
8. fingeprint distinguisher as described in claim 1, which is characterized in that the outer surface of multiple light refractive structures is a flat surface
An or curved surface.
9. fingeprint distinguisher as described in claim 1, which is characterized in that further include a finishing type part, be set to light extraction
Between face and collimation part.
10. fingeprint distinguisher as described in claim 1, which is characterized in that further include：
One first adhesion part is set between the cover board and the light-emitting surface；And
One second adhesion part is set between the light-emitting surface and the collimation part.
Priority Applications (1)
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| CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子（上海）有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
| US20160171271A1 (en) * | 2014-12-11 | 2016-06-16 | Fingerprint Cards Ab | Fingerprint sensing device |
| CN105844212A (en) * | 2015-02-02 | 2016-08-10 | 辛纳普蒂克斯公司 | Optical sensor using collimator |
| CN106339663A (en) * | 2015-07-09 | 2017-01-18 | 金佶科技股份有限公司 | Fingerprint identification module |
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| CN103699885A (en) * | 2013-12-18 | 2014-04-02 | 格科微电子（上海）有限公司 | Optical fingerprint collecting method, optical fingerprint collecting device and portable type electronic device |
| US20160171271A1 (en) * | 2014-12-11 | 2016-06-16 | Fingerprint Cards Ab | Fingerprint sensing device |
| CN105844212A (en) * | 2015-02-02 | 2016-08-10 | 辛纳普蒂克斯公司 | Optical sensor using collimator |
| CN106339663A (en) * | 2015-07-09 | 2017-01-18 | 金佶科技股份有限公司 | Fingerprint identification module |
| CN106339662A (en) * | 2015-07-09 | 2017-01-18 | 金佶科技股份有限公司 | Fingerprint identification module |
| CN105550664A (en) * | 2016-01-08 | 2016-05-04 | 上海箩箕技术有限公司 | Optical fingerprint sensor module |
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