CN106951815A - Optical fingerprint sensor module - Google Patents
Optical fingerprint sensor module Download PDFInfo
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- CN106951815A CN106951815A CN201610006676.0A CN201610006676A CN106951815A CN 106951815 A CN106951815 A CN 106951815A CN 201610006676 A CN201610006676 A CN 201610006676A CN 106951815 A CN106951815 A CN 106951815A
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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
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S8/00—Lighting devices intended for fixed installation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V19/00—Fastening of light sources or lamp holders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
A kind of optical fingerprint sensor module, including：Optical fingerprint sensor, the optical fingerprint sensor has transparent substrates and the device layer positioned at the transparent substrates surface, the device layer has multiple pixels, each pixel has transmission region and alternatively non-transparent region, the alternatively non-transparent region has photo-sensitive cell, and the transmission region enables light to pass through the device layer；Also include：Self-emission panel light source, the self-emission panel light source is set directly at below the optical fingerprint sensor.The backlight light-emitting uniformity of the optical fingerprint sensor module is improved, and is on the one hand improved performance, is on the other hand simplified structure.
Description
Technical field
The present invention relates to fingerprint sensing field, more particularly to a kind of optical fingerprint sensor module.
Background technology
Fingerprint imaging identification technology, is the fingerprint image that human body is collected by optical fingerprint sensor, so
It is compared afterwards with the existing fingerprint imaging information in system, whether carrys out correct judgment, and then realize identity
The technology of identification.Due to the uniqueness of the convenience that it is used, and somatic fingerprint, fingerprint imaging identification
Technology has been widely used in every field.The gate inhibition of the field of safety check such as such as public security bureau and customs, building
Consumer product area such as system and PC and mobile phone etc..The realization side of fingerprint imaging identification technology
Formula has the multiple technologies such as optical imagery, capacitance imaging, ultrasonic imaging.Comparatively, optical finger print is imaged
Identification technology imaging effect is relatively preferable, and equipment cost is relatively low.
As shown in figure 1, existing optical fingerprint sensor module is sensed by back light system 110, optical finger print
The structure compositions such as device 120, protective layer 130 and shell (not shown).When gathering fingerprint image, human body
Finger 140 is positioned on protective layer 130；The emergent light 111 of back light system 110 is (each upward in Fig. 1
Arrow all represent to surround whole arrows with dotted line circle in emergent light 111, figure marked with unified) pass through optics
Fingerprint sensor 120 and protective layer 130, occur in the contact interface of human body finger 140 and protective layer 130
Reflection and transmission；(each downward arrow represents to use in reflected light 112, figure reflected light 112 in Fig. 1
Dotted line circle is surrounded all downward arrow and marked with unified) protective layer 130 is passed through, it is irradiated to optical finger print biography
On sensor 120；Chip (not shown) inside optical fingerprint sensor 120 carries out opto-electronic conversion and letter
Number processing, realize the collection of fingerprint image.Due to the contact portion of human body finger 140 and protective layer 130
Feature reflects the fingerprint characteristic of human body, and the feature of this contact portion can directly affect reflected light 112
Feature, therefore, the image that optical fingerprint sensor 120 is collected directly reflects the spy of somatic fingerprint
Levy.
More contents about optical fingerprint sensor refer to Publication No. CN204759454U China
Utility model patent.
The structure of existing optical fingerprint sensor module has much room for improvement, and performance has much room for improvement.
The content of the invention
The problem of present invention is solved is to provide a kind of optical fingerprint sensor module, to simplify optical finger print biography
The structure of sensor module, improves the performance of optical fingerprint sensor module.
To solve the above problems, the present invention provides a kind of optical fingerprint sensor module, optical finger print sensing
Device module includes：
Optical fingerprint sensor, the optical fingerprint sensor has transparent substrates and positioned at the printing opacity base
The device layer of plate surface, the device layer has multiple pixels, each pixel have transmission region and
Alternatively non-transparent region, the alternatively non-transparent region has photo-sensitive cell, and the transmission region enables light to pass through
The device layer；
Self-emission panel light source, the self-emission panel light source is set directly at the optical fingerprint sensor
Lower section.
Optionally, the self-emission panel light source is a whole face formula light source, and the whole face formula light source is whole
Face formula OLED light source or whole face formula EL light sources.
Optionally, the first electrode of the whole face formula light source is located at the first surface of the whole face formula light source；
The second electrode of the whole face formula light source is located at the second surface of the whole face formula light source, the first surface
Fitted with the transparent substrates.
Optionally, the material of the first electrode is transparent conductive material, and the first electrode is located at described
The exiting surface of self-emission panel light source；The material of the second electrode is silver, silver-colored magnesium alloy, aluminium, lithium,
Magnesium, calcium, indium or aluminium lithium alloy, and the one side of the second electrode towards the first electrode is anti-
Smooth surface.
Optionally, the self-emission panel light source is lattice light source, and the lattice light source includes array
Multiple point source of lights of arrangement, the point source of light is point-like OLED light source or point-like EL light sources；Institute
The first electrode for stating point source of light is located at the first surface of the point source of light；The second of the point source of light
Electrode is located at the second surface of the point source of light.
Optionally, the first surface is fitted with the transparent substrates, and the material of the first electrode is
Bright conductive material, the first electrode is located at the exiting surface of the point source of light；The material of the second electrode
Expect for silver, silver-colored magnesium alloy, aluminium, lithium, magnesium, calcium, indium or aluminium lithium alloy.
Optionally, in multiple point source of lights of array arrangement, described the of each point source of light
Two electrodes interconnect to form whole face electrode, the first electrode of point source of light described in per a line
Interconnect, and the first electrode for the point source of light of not going together mutually separates；Or,
In multiple point source of lights of array arrangement, the second electrode of each point source of light is mutually interconnected
It is connected together to form whole face electrode, the first electrode of each row point source of light is interconnected on one
Rise, and the first electrode of point source of light described in different lines mutually separates.
Optionally, in multiple point source of lights of array arrangement, described the of each point source of light
Two electrodes interconnect to form whole face electrode, the first electrode phase of each point source of light
Mutually separate.
Optionally, the first electrode of a point source of light electrically connects another point source of light
The second electrode, until all point source of lights series connection.
Optionally, the first electrode is anode, and the second electrode is negative electrode；Or, described first
Electrode is negative electrode, and the second electrode is anode.
Compared with prior art, technical scheme has advantages below：
In technical scheme, using a kind of self-emission panel light source as backlight, spontaneous smooth surface
Plate light source can provide uniform light, the problem of solving optical fingerprint sensor backlight source uniform, carry
The uniformity of high backlight.Also, self-emission panel light source is set directly at below optical fingerprint sensor,
It therefore, it can omit corresponding light guide plate, so as to simplify structure, simplify design.Also, optical finger print
When sensor module carries out fingerprint image acquisition, except the gray scale difference that fingerprint itself (such as valley and a ridge) is caused,
Uniform gray level in the range of whole fingerprint image, i.e., whole optical fingerprint sensor module can form gray scale
Uniform fingerprint image, overcomes the problem of existing fingerprint image gray scale is uneven.Self-emission panel light source is
It is corresponding simple for assembly process, it is easy to operate when whole face formula OLED light source is as backlight, and also
The utilization rate for improving backlight is low, reduces the energy consumption of backlight.
Brief description of the drawings
Fig. 1 is existing optical fingerprint sensor module schematic diagram；
Fig. 2 is back light system and optical fingerprint sensor lamination schematic diagram in Fig. 1；
Fig. 3 is the optical fingerprint sensor module schematic diagram that first embodiment of the invention is provided；
Fig. 4 is the whole face formula OLED light source schematic diagram in optical fingerprint sensor mould shown in Fig. 3；
Fig. 5 is the part signal of optical fingerprint sensor device layer in optical fingerprint sensor mould shown in Fig. 3
Figure；
Fig. 6 is the optical fingerprint sensor module schematic diagram that second embodiment of the invention is provided；
Fig. 7 is point-like EL light-source structure schematic diagrames in optical fingerprint sensor module shown in Fig. 6；
Fig. 8 is self-emission panel light source in the optical fingerprint sensor module that third embodiment of the invention is provided
Schematic diagram；
Fig. 9 is self-emission panel light source in the optical fingerprint sensor module that fourth embodiment of the invention is provided
Schematic diagram；
Figure 10 is self-emission panel light source in the optical fingerprint sensor module that fifth embodiment of the invention is provided
Schematic diagram；
Figure 11 is self-emission panel light source in the optical fingerprint sensor module that sixth embodiment of the invention is provided
Schematic diagram.
Embodiment
Existing optical fingerprint sensor module as shown in Figure 1, its back light system 110 used (please join
Examine Fig. 1) concrete structure as shown in Fig. 2 back light system 110 is typically (including the LED of LED 111
Luminous point 1111) and light guide plate 112 combination.Light guide plate 112 is placed in optical fingerprint sensor 120
Immediately below pel array (not shown), the face of the area of light guide plate 112 at least with the pixel array region
Product is equally big.LED 111 is usually located at the one side or the multi-lateral of light guide plate 112.LED 111 is sent
Light, the direction of propagation and homogenization are changed through the effect of light guide plate 112.Because light guide plate 112 is placed in light
Learn below the pixel array region of fingerprint sensor 120, so LED 111 emits beam by light guide plate 112
The light up propagated is changed over, and optical finger print is injected from the bottom direction of optical fingerprint sensor 120
Sensor 120.
But, by Fig. 2 it can be appreciated that under the conditions of this back light system 110, optical fingerprint sensor
The incident light light quantity of 120 lower section diverse locations is inconsistent.The local light quantity near from LED 111 is more,
The local light quantity remote from LED 111 is few.The amount of light inhomogeneities of back light system 110 can enter one and not lead
Cause the light quantity from pel array transparent area transmission uneven, then to incide finger and the light of protection bed boundary
Amount also can be uneven, finally result in the light quantity that pel array different zones sense be also it is uneven, i.e., from
The light quantity of the near pixel sensing of LED 111 is more, and the light quantity that the pixel remote from LED 111 is sensed is few.
As in Fig. 2, the light quantity that dotted line frame 110a surrounds position is more, and the light quantity that dotted line frame 110b surrounds position is few.
These inhomogeneities are reacted on corresponding fingerprint image, are exactly the local fingerprint image near from LED 111
As brighter, remote from LED 111 local fingerprint image is more relatively dark, so as to have impact on fingerprint recognition light
Learn the image quality of fingerprint sensor 120.
Solve the problem of light source is uneven at present to optimize generally by light guide plate, such as to leaded light
Site density on plate carries out design, production and test repeatedly etc., will until meeting corresponding uniformity
Ask.However, light guide plate is optimized anyway, due to the limitation of this backlight system construction in itself,
The light substantially uniformity that back light system each position can not all the time sent.And back light system after this optimization
It is increasingly complex, made troubles to structure design and production.In addition, before no matter optimizing or after optimization, this
Planting the light of back light system offer may miss from light guide plate bottom, therefore the utilization rate of light source is low.For
Clearly image is obtained, this back light system needs that more effectively light quantity (how much need of light quantity provided
Depending on will be according to specific optical fingerprint sensor), therefore usually require the power supply electricity by improving LED
Press to realize, and utilization rate is lower, voltage needed for LED will improve more, cause whole system to need
The power consumption wanted is bigger.
From the foregoing, the shortcoming of current back light system is：The light that back light system is provided is uneven,
Backlight system construction and design are all more complicated, are not easy to assemble and produce, and influence sensor to be imaged matter
Amount.Meanwhile, the light source utilization rate of back light system is low, increases fingerprint recognition system energy consumption.Also, it is existing
Solution not only increase cost, solution is cumbersome, and the design cycle is long, and accordingly solve set
Meter framework is not easy to production, also results in the further raising of energy consumption.
Therefore, the present invention provides a kind of new optical fingerprint sensor module, the optical fingerprint sensor
Module is using a kind of self-emission panel light source as backlight, and self-emission panel light source can provide uniform light
Line, the problem of solving optical fingerprint sensor backlight source uniform improves the uniformity of backlight, from
And the performance of optical fingerprint sensor module is on the one hand improved, on the other hand simplify optical finger print sensing
The structure of device module.
It is understandable to enable the above objects, features and advantages of the present invention to become apparent, below in conjunction with the accompanying drawings
The specific embodiment of the present invention is described in detail.
First embodiment of the invention provides a kind of optical fingerprint sensor module, incorporated by reference to reference to Fig. 3 to Fig. 5.
Fig. 3 is refer to, the optical fingerprint sensor module includes optical fingerprint sensor 220 and self-luminous
Panel light source 210, self-emission panel light source 210 is set directly at the lower section of optical fingerprint sensor 220.This
In embodiment, self-emission panel light source 210 is set directly at the lower section of optical fingerprint sensor 220 and referred to：
Self-emission panel light source 210 is bearing directly against the lower section of optical fingerprint sensor 220, and both surfaces are unlimited
Close to (being now not excluded for may having minim gap between the two), or both directly contact (now not
Exclusion may have minim gap between both some positions).But it should be strongly noted that spontaneous smooth surface
Plate light source 210, which is set directly at the lower section of optical fingerprint sensor 220, also includes another situation, is exactly certainly
Optical cement, the optics can be included between luminescent panel light source 210 and optical fingerprint sensor 220
Both are pasted together by glue.
In the present embodiment, self-emission panel light source 210 is a whole face formula light source, i.e., whole spontaneous smooth surface
Plate light source 210 is the light source of a whole face structure.Also, in the present embodiment, the whole face formula light source is
Whole face formula OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) light source.
Whole face formula OLED light source described in one of which is as shown in figure 4, it includes being located at (the substrate of substrate 211
211 normally transparents) on anode 212 and negative electrode 218.It is light emitting machine between anode 212 and negative electrode 218
Structure lamination.The ray structure lamination includes hole injection layer 213 (HIL), hole transmission layer (HTL)
214th, luminescent layer 215 (EML), electron transfer layer (ETL) 216 and electron injecting layer 217 (EIL).
The principle of luminosity of the whole face formula OLED light source is：In certain voltage, (power supply in Fig. 4 represents described
Voltage) driving under, electronics and hole are injected into electron transfer layer 216 from negative electrode 218 and anode 212 respectively
With hole transmission layer 214, electronics and hole are moved respectively through electron transfer layer 216 and hole transmission layer 214
Luminescent layer 215 is moved on to, and is met in luminescent layer 215, exciton is formed and excites light emitting molecule, light
Molecule sends visible ray (or other light) by radiative relaxation.
In the present embodiment, the material of anode 212 can be transparent conductive material, and such as anode 212 can be with
Made using transparent indium tin oxide (ITO), anode 212 is located at the exiting surface of self-emission panel light source 210
(direction of arrow in Fig. 4 represents light light direction).Negative electrode 218 can use metal or metal oxygen
Compound makes.Negative electrode 218 is as metal electrode film, while also play the effect in reflecting layer, it is to avoid light from
Lose in this face.Specifically, negative electrode 218, because the reflecting effect of silver is good, can improve light source from silver
Utilization rate, but the not limited to this material of negative electrode 218, the material of negative electrode 218 can also for silver-colored magnesium alloy,
Aluminium, lithium, magnesium, calcium, indium or aluminium lithium alloy etc., and in the present embodiment, negative electrode 218 is towards anode
212 one side is reflective surface.
It should be noted that in other embodiments, self-emission panel light source 210 can also be whole face formula EL
(Electroluminescence, electroluminescent panel) light source.
Though it should be noted that not shown in figure, in the present embodiment, optical fingerprint sensor module is also
Including protective layer, the protective layer is located at the top of optical fingerprint sensor 220.The protective layer energy
Enough printing opacities (the usual protective layer is pellucidity), the protective layer can be by glass, plastics, Lan Bao
The material such as stone or fibre faceplate, refers to Fig. 1 and Fig. 2 corresponding contents.
In the present embodiment, optical fingerprint sensor 220 has transparent substrates (not shown) and positioned at described
The device layer (not shown) on transparent substrates surface, the device layer has multiple pixels (not marking), often
The individual pixel has transmission region and alternatively non-transparent region, and the alternatively non-transparent region has photo-sensitive cell, institute
Stating transmission region enables light to pass through the device layer.The device layer also includes scanning circuit and reading
Circuit etc..It is many that a plurality of data lines and second of the device layer also including the first axial direction arrangement are axially arranged
Bar scan line, the data wire and the scan line limit net region, and the pixel is located at the net
In lattice region.The pel array is to include multiple pixels, and multiple pixels can be ranks arrangement.
Wherein, Fig. 5 shows the part-structure of above-mentioned device layer, specifically, Fig. 5 shows wherein two
A part for a part for bar adjacent data line 222 and two adjacent scanning lines 221, they, which intersect, limits
Go out a latticed pixel region (not marking), and a pixel is located at grid as shown in Figure 5
In region.The pixel include a TFT switch element (not marking), a photo-sensitive cell 223 and
Transmission region 224, the TFT switch element and the region of photo-sensitive cell 223 are all light tight, and its
Its region is all transmission region 224.
In the present embodiment, for detecting optical signal, (optical signal is finger to optical fingerprint sensor 220
The light signal that fingerprint is reflected), the optical signal detected is converted into charge signal, then passes through letter
Number reading chip (Read out IC, not shown) converts the charge to corresponding data signal, finally reflects
It is the width gray scale image relevant with finger print information on corresponding Product Terminal.Specifically, injecting
The light of optical fingerprint sensor 220 is passed through from the transmission region 224 of the pixel, is then passed through the protection
Layer, then can occur refraction and reflex at the interface of finger and the protective layer.The paddy of finger print
It is uneven with ridge, the interface pair that the interface that paddy and the protective layer are constituted is constituted with ridge and protective layer
The refraction of light is different with reflex effect, causes the light for being reflected back optical fingerprint sensor 220 will not
As many, then the light that photo-sensitive cell 223 senses and changed is different, therefore the optical charge signal formed is not
Equally, so as to form the width gray-scale figure consistent with finger print information.
In the optical fingerprint sensor module that the present embodiment is provided, using a kind of self-emission panel light source 210
As backlight, self-emission panel light source 210 is whole face formula OLED light source, self-emission panel light source 210
Uniform light can be provided, the problem of solving 220 backlight source uniform of optical fingerprint sensor is improved
The uniformity of backlight.Meanwhile, self-emission panel light source 210 is set directly at optical fingerprint sensor 220
Lower section, therefore, it can omit corresponding light guide plate, so as to simplify structure, simplify design.Also, make
When the optical fingerprint sensor module provided with the present embodiment carries out fingerprint image acquisition, except fingerprint certainly
Uniform gray level in the range of the gray scale difference that body (such as valley and a ridge) is caused, whole fingerprint image, i.e., whole light
The fingerprint image of uniform gray level can be formed by learning fingerprint sensor module, overcome existing fingerprint image gray scale
Uneven the problem of.Meanwhile, self-emission panel light source 210 be whole face formula OLED light source as backlight when,
It is corresponding simple for assembly process, it is easy to operate, and it is low to also improve the utilization rate of backlight, the reduction back of the body
The energy consumption of light source.
Second embodiment of the invention provides another optical fingerprint sensor module, incorporated by reference to reference to Fig. 6 and
Fig. 7.
Fig. 6 is refer to, the optical fingerprint sensor module includes optical fingerprint sensor 320 and self-luminous
Panel light source, self-emission panel light source is set directly at the lower section of optical fingerprint sensor 320.
In the present embodiment, self-emission panel light source is lattice light source (not marking), the lattice light source
Multiple point source of lights 310 including array arrangement, point source of light 310 is point-like EL light sources.Show in Fig. 6
Example shows out several point source of lights 310 therein.
In other embodiments, the point source of light can also be point-like OLED light source.
Point-like EL light sources described in one of which are as shown in fig. 7, it includes being located at (the substrate 311 of substrate 311
Normally transparent) on anode 312 and negative electrode 316.It is that lighting means are folded between anode 312 and negative electrode 316
Layer.The ray structure lamination includes dielectric film 313, luminescent layer 314 and dielectric film 315.Institute
The principle of luminosity for stating point-like EL light sources is：Making alive is (in Fig. 7 between anode 312 and negative electrode 316
Power supply represents the voltage) to produce electric field, the electronics percussion luminescent layer 314 excited by the electric field
The centre of luminescence, and be led to electronics in transition between energy level, change and be combined, so that luminous.The present embodiment
Middle setting light can only be sent from the side of anode 312, to avoid the loss of light.In other embodiments, also may be used
So that light is simultaneously emitted by from anode 312 and the both sides of negative electrode 316 (i.e. the upper side and lower side shown in Fig. 7).
In the present embodiment, the material of anode 312 can be transparent conductive material, and such as anode 312 can be with
Made using transparent indium tin oxide, anode 312 is located at the exiting surface of self-emission panel light source (in Fig. 7
The direction of arrow represents light light direction).Negative electrode 316 can be made using metal or metal oxide.
Negative electrode 316 is as metal electrode film, while also play the effect in reflecting layer, it is to avoid light loses from this face.
Specifically, negative electrode 316 can improve light source utilization rate from silver, because the reflecting effect of silver is good, but
The not limited to this material of negative electrode 316, the material of negative electrode 316 can also for silver-colored magnesium alloy, aluminium, lithium, magnesium,
Calcium, indium or aluminium lithium alloy etc., and in the present embodiment, the one side of negative electrode 316 towards anode 312 is
Reflective surface.
Though it should be noted that not shown in figure, in the present embodiment, optical fingerprint sensor module is also
Including protective layer, the protective layer is located at the top of optical fingerprint sensor 320.The protective layer energy
Enough printing opacities (the usual protective layer is pellucidity), the protective layer can be by glass, plastics, Lan Bao
The material such as stone or fibre faceplate, refers to Fig. 1 and Fig. 2 corresponding contents.
Other NM structures and content may be referred to this theory in the present embodiment optical fingerprint sensor module
Bright book previous embodiment corresponding contents.
In the optical fingerprint sensor module that the present embodiment is provided, made using a kind of self-emission panel light source
For backlight, self-emission panel light source includes multiple point source of lights 310 that lattice array is arranged, the self-luminous
Panel light source can provide uniform light, solve asking for the backlight source uniform of optical fingerprint sensor 320
Topic, improves the uniformity of backlight.Also, self-emission panel light source is set directly at optical finger print sensing
The lower section of device 320, therefore, it can omit corresponding light guide plate, so as to simplify structure, simplify design.And
And, when the optical fingerprint sensor module provided using the present embodiment carries out fingerprint image acquisition, except
Uniform gray level in the range of the gray scale difference that fingerprint itself (such as valley and a ridge) is caused, whole fingerprint image, i.e.,
Whole optical fingerprint sensor module can form the fingerprint image of uniform gray level, overcome existing fingerprint image
As the problem of gray scale inequality.Also, it is corresponding simple for assembly process, it is easy to operate, and also improve
The utilization rate of backlight is low, reduces the energy consumption of backlight.
Third embodiment of the invention provides another optical fingerprint sensor module, refer to Fig. 8, the light
Learning fingerprint sensor module includes optical fingerprint sensor (not shown) and self-emission panel light source 410, from
Luminescent panel light source 410 is set directly at below the optical fingerprint sensor.
In the present embodiment, self-emission panel light source 410 is whole face formula light source, and the whole face formula light source is whole
Face formula OLED light source or whole face formula EL light sources.
In the present embodiment, self-emission panel light source 410 includes first electrode 412 and second electrode 413, with
And the lighting means lamination 411 between first electrode 412 and second electrode 413.In the present embodiment,
The first electrode 412 of self-emission panel light source 410 and the electrode extraction location of second electrode 413 are located at whole
The same side of individual light source, to facilitate corresponding structure to be electrically connected.
In the present embodiment, the first electrode is anode, and the second electrode is negative electrode.Other embodiments
In or the first electrode be negative electrode, the second electrode be anode.
Though it should be noted that not shown in figure, in the present embodiment, optical fingerprint sensor module is also
Including protective layer, the protective layer is located above the optical fingerprint sensor.The protective layer can be saturating
Light (usual the protective layer be pellucidity), the protective layer can by glass, plastics, sapphire or
The materials such as person's fibre faceplate.
In the present embodiment, the first electrode of the whole face formula light source is located at the first table of the whole face formula light source
Face.The second electrode of the whole face formula light source is located at the second surface of the whole face formula light source, described first
Fitted with the transparent substrates on surface.
In the present embodiment, the first surface is exiting surface, and the second surface both can be exiting surface,
Can also be reflective surface, and (second electrode is towards first electrode for second surface when being reflective surface
Surface be reflective surface), advantageously in light from first surface enter corresponding optical fingerprint sensor,
So as to improve the luminous utilization rate of self-emission panel light source 410.
Other NM structures and content may be referred to this theory in the present embodiment optical fingerprint sensor module
Bright book previous embodiment corresponding contents.
In the optical fingerprint sensor module that the present embodiment is provided, using a kind of self-emission panel light source 410
As backlight, self-emission panel light source 410 is whole face formula light source, the self-emission panel light source 410
Uniform light can be provided, the problem of solving the optical fingerprint sensor backlight source uniform is improved
The uniformity of backlight, simplifies structure, simplifies design, and the utilization rate for improving backlight is low, the reduction back of the body
The energy consumption of light source.
Fourth embodiment of the invention provides another optical fingerprint sensor module, refer to Fig. 9, the light
Learning fingerprint sensor module includes optical fingerprint sensor (not shown) and self-emission panel light source 510, from
Luminescent panel light source 510 is set directly at below the optical fingerprint sensor.
In the present embodiment, self-emission panel light source 510 is lattice light source, and the lattice light source includes
Multiple point source of lights of array arrangement, the point source of light is point-like OLED light source or point-like EL light sources.
Example shows out several point source of lights therein in Fig. 9.
In the present embodiment, in multiple point source of lights of array arrangement, the institute of each point source of light
State second electrode to interconnect to form whole face electrode 512, described the first of each point source of light
Electrode mutually separates, such as shows that first electrode 513 and first electrode 514 all mutually separate in Fig. 9.
It is each lighting means lamination 511 between each first electrode and whole face electrode 512.
In the present embodiment, each first electrode of self-emission panel light source 510 and the electrode of second electrode 512
Extraction location is located at the same side of whole light source, to facilitate corresponding structure to be electrically connected.Described first
Electrode is anode, and the second electrode is negative electrode.In other embodiments or the first electrode
For negative electrode, the second electrode is anode.
In the present embodiment, the first electrode of each point source of light is located at the first table of the point source of light
Face；The second electrode of the point source of light is located at the second surface of the point source of light.In the present embodiment,
The first surface is fitted with the transparent substrates, and the first surface is exiting surface, and second table
Face both can be exiting surface or reflective surface, and second surface when being reflective surface (the
Two electrodes towards the surface of first electrode be reflective surface), advantageously enter corresponding from first surface in light
Optical fingerprint sensor, so as to improve the luminous utilization rate of self-emission panel light source 510.
Though it should be noted that not shown in figure, in the present embodiment, optical fingerprint sensor module is also
Including protective layer, the protective layer is located above the optical fingerprint sensor.The protective layer can be saturating
Light (usual the protective layer be pellucidity), the protective layer can by glass, plastics, sapphire or
The materials such as person's fibre faceplate.
Other NM structures and content may be referred to this theory in the present embodiment optical fingerprint sensor module
Bright book previous embodiment corresponding contents.
In the optical fingerprint sensor module that the present embodiment is provided, using a kind of self-emission panel light source 510
As backlight, self-emission panel light source 510 is lattice light source, the self-emission panel light source 510
Uniform light can be provided, the problem of solving the optical fingerprint sensor backlight source uniform is improved
The uniformity of backlight, simplifies structure, simplifies design, and the utilization rate for improving backlight is low, the reduction back of the body
The energy consumption of light source.
Fifth embodiment of the invention provides another optical fingerprint sensor module, refer to Figure 10, described
Optical fingerprint sensor module includes optical fingerprint sensor (not shown) and self-emission panel light source 610,
Self-emission panel light source 610 is set directly at below the optical fingerprint sensor.
In the present embodiment, self-emission panel light source 610 is lattice light source, and the lattice light source includes
Multiple point source of lights of array arrangement, the point source of light is point-like OLED light source or point-like EL light sources.
Example shows out several point source of lights therein in Figure 10.
In the present embodiment, in multiple point source of lights of array arrangement, the of each point source of light
Two electrodes interconnect to form whole face electrode 612, first electricity of each row point source of light
Pole 613 is interconnected, and the first electrode 613 of point source of light described in different lines is mutually divided
Every.Have between one row first electrode 613 and whole face electrode 612 corresponding to the multiple luminous of line number number
Mechanism lamination 611.
It should be noted that in other embodiments or in multiple point-like light of array arrangement
In source, the second electrode of each point source of light interconnects to form whole face electrode, often
The first electrode of point source of light described in a line interconnects, and the point source of light of not going together
The first electrode mutually separate.
In the present embodiment, the first electrode of each point source of light is located at the first table of the point source of light
Face；The second electrode of the point source of light is located at the second surface of the point source of light.In the present embodiment,
The first surface is fitted with the transparent substrates, and the first surface is exiting surface, and second table
Face both can be exiting surface or reflective surface, and second surface when being reflective surface (the
Two electrodes towards the surface of first electrode be reflective surface), advantageously enter corresponding from first surface in light
Optical fingerprint sensor, so as to improve the luminous utilization rate of self-emission panel light source 610.
Though it should be noted that not shown in figure, in the present embodiment, optical fingerprint sensor module is also
Including protective layer, the protective layer is located above the optical fingerprint sensor.The protective layer can be saturating
Light (usual the protective layer be pellucidity), the protective layer can by glass, plastics, sapphire or
The materials such as person's fibre faceplate.
Other NM structures and content may be referred to this theory in the present embodiment optical fingerprint sensor module
Bright book previous embodiment corresponding contents.
In the optical fingerprint sensor module that the present embodiment is provided, using a kind of self-emission panel light source 610
As backlight, self-emission panel light source 610 is lattice light source, the self-emission panel light source 610
Uniform light can be provided, the problem of solving the optical fingerprint sensor backlight source uniform is improved
The uniformity of backlight, simplifies structure, simplifies design, and the utilization rate for improving backlight is low, the reduction back of the body
The energy consumption of light source.
Sixth embodiment of the invention provides another optical fingerprint sensor module, the optical finger print sensing
Device module includes optical fingerprint sensor (not shown) and self-emission panel light source, self-emission panel light source
It is set directly at below the optical fingerprint sensor.Figure 11 is refer to, shows that the optical finger print is passed
The self-emission panel light source 710 of sensor module, self-emission panel light source 710 is set directly at the optics and referred to
Below line sensor.
In the present embodiment, self-emission panel light source 710 is lattice light source, and the lattice light source includes
Multiple point source of lights (not marking) of array arrangement, the point source of light is point-like OLED light source or point
Shape EL light sources.
In the present embodiment, in multiple point source of lights of array arrangement, the of each point source of light
One electrode (not shown) is located at the first surface of the point source of light；The second electrode of the point source of light
(not shown) is located at the second surface of the point source of light.First electricity of one point source of light
Pole electrically connects the second electrode of another point source of light, until all point source of light series connection.
Specifically, as shown in Figure 11, be connected with each other between the adjacent point source of light with wire 711, so that
The first electrode of a point source of light is set to electrically connect described the second of another point source of light
Electrode.
In the present embodiment, the first surface is fitted with the transparent substrates (not shown), and described first
Surface is exiting surface, and the second surface both can be exiting surface or reflective surface, and institute
State second surface when being reflective surface (i.e. second electrode towards the surface of first electrode be reflective surface), more added with
Enter corresponding optical fingerprint sensor from first surface beneficial to light, so as to improve self-emission panel light source
Luminous utilization rate.
In the present embodiment, the optical fingerprint sensor module also includes protective layer (not shown), the guarantor
Sheath is located above the optical fingerprint sensor.The protective layer being capable of printing opacity (the usual protective layer
For pellucidity), the protective layer can be by materials such as glass, plastics, sapphire or fibre faceplates.
Other NM structures and content may be referred to this theory in the present embodiment optical fingerprint sensor module
Bright book previous embodiment corresponding contents.
In the optical fingerprint sensor module that the present embodiment is provided, using a kind of self-emission panel light source 710
As backlight, self-emission panel light source 710 is lattice light source, and self-emission panel light source 710 can
Uniform light is provided, the problem of solving the optical fingerprint sensor backlight source uniform improves backlight
The uniformity in source, simplifies structure, simplifies design, and the utilization rate for improving backlight is low, reduces backlight
Energy consumption.
Although present disclosure is as above, the present invention is not limited to this.Any those skilled in the art,
Without departing from the spirit and scope of the present invention, it can make various changes or modifications, therefore the guarantor of the present invention
Shield scope should be defined by claim limited range.
Claims (10)
1. a kind of optical fingerprint sensor module, including：
Optical fingerprint sensor, the optical fingerprint sensor has transparent substrates and positioned at the transparent substrates
The device layer on surface, the device layer has multiple pixels, each pixel have transmission region and
Alternatively non-transparent region, the alternatively non-transparent region has photo-sensitive cell, and the transmission region enables light saturating
Cross the device layer；
Characterized in that, also including：Self-emission panel light source, the self-emission panel light source is set directly at
Below the optical fingerprint sensor.
2. optical fingerprint sensor module as claimed in claim 1, it is characterised in that the self-emission panel
Light source is whole face formula light source, and the whole face formula light source is whole face formula OLED light source or whole face formula EL
Light source.
3. optical fingerprint sensor module as claimed in claim 2, it is characterised in that the whole face formula light source
First electrode be located at the whole face formula light source first surface；The second electrode of the whole face formula light source
Positioned at the second surface of the whole face formula light source, the first surface is fitted with the transparent substrates.
4. optical fingerprint sensor module as claimed in claim 3, it is characterised in that the first electrode
Material is transparent conductive material, and the first electrode is located at the exiting surface of the self-emission panel light source；
The material of the second electrode is silver, silver-colored magnesium alloy, aluminium, lithium, magnesium, calcium, indium or aluminium lithium alloy,
And the one side of the second electrode towards the first electrode is reflective surface.
5. optical fingerprint sensor module as claimed in claim 1, it is characterised in that the self-emission panel
Light source is lattice light source, and the lattice light source includes multiple point source of lights of array arrangement, described
Point source of light is point-like OLED light source or point-like EL light sources；The first electrode of the point source of light
Positioned at the first surface of the point source of light；The second electrode of the point source of light is located at the point-like light
The second surface in source.
6. optical fingerprint sensor module as claimed in claim 5, it is characterised in that the first surface with
The transparent substrates laminating, the material of the first electrode is transparent conductive material, the first electrode
Positioned at the exiting surface of the point source of light；The material of the second electrode is silver, silver-colored magnesium alloy, aluminium,
Lithium, magnesium, calcium, indium or aluminium lithium alloy.
7. optical fingerprint sensor module as claimed in claim 5, it is characterised in that array arrangement it is multiple
In the point source of light, the second electrode of each point source of light interconnects to be formed
Whole face electrode, the first electrode of point source of light interconnects described in per a line, and different
The first electrode of the row point source of light mutually separates；Or, multiple points of array arrangement
In shape light source, the second electrode of each point source of light interconnects to form whole face electricity
Pole, the first electrode of each row point source of light interconnects, and described in different lines
The first electrode of point source of light mutually separates.
8. optical fingerprint sensor module as claimed in claim 5, it is characterised in that array arrangement it is multiple
In the point source of light, the second electrode of each point source of light interconnects to be formed
Whole face electrode, the first electrode of each point source of light mutually separates.
9. optical fingerprint sensor module as claimed in claim 5, it is characterised in that the point-like light
The first electrode in source electrically connects the second electrode of another point source of light, until all
The point source of light series connection.
10. the optical fingerprint sensor module as described in claim 3 to 8 any one, it is characterised in that institute
First electrode is stated for anode, the second electrode is negative electrode；Or, the first electrode is negative electrode,
The second electrode is anode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006676.0A CN106951815A (en) | 2016-01-06 | 2016-01-06 | Optical fingerprint sensor module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610006676.0A CN106951815A (en) | 2016-01-06 | 2016-01-06 | Optical fingerprint sensor module |
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| CN106951815A true CN106951815A (en) | 2017-07-14 |
Family
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| CN201610006676.0A Pending CN106951815A (en) | 2016-01-06 | 2016-01-06 | Optical fingerprint sensor module |
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| CN107480661A (en) * | 2017-09-30 | 2017-12-15 | 苏州迈瑞微电子有限公司 | A kind of light path of optical fingerprint sensor and there is its optical fingerprint sensor |
| CN107657231A (en) * | 2017-09-27 | 2018-02-02 | 京东方科技集团股份有限公司 | Fingerprint Identification sensor and preparation method thereof and display device |
| CN109426766A (en) * | 2017-08-23 | 2019-03-05 | 上海箩箕技术有限公司 | Fingerprint imaging mould group and electronic equipment |
| WO2020177151A1 (en) * | 2019-03-01 | 2020-09-10 | 惠科股份有限公司 | Fingerprint input device and display device |
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| CN202584158U (en) * | 2012-03-06 | 2012-12-05 | 上海博云信息技术有限公司 | Secondary total reflection fingerprint collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109426766A (en) * | 2017-08-23 | 2019-03-05 | 上海箩箕技术有限公司 | Fingerprint imaging mould group and electronic equipment |
| CN107657231A (en) * | 2017-09-27 | 2018-02-02 | 京东方科技集团股份有限公司 | Fingerprint Identification sensor and preparation method thereof and display device |
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| CN107657231B (en) * | 2017-09-27 | 2020-08-11 | 京东方科技集团股份有限公司 | Fingerprint identification sensor, manufacturing method thereof and display device |
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| WO2020177151A1 (en) * | 2019-03-01 | 2020-09-10 | 惠科股份有限公司 | Fingerprint input device and display device |
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Application publication date: 20170714 |