CN108399392A - Fingerprint recognition structure and display device - Google Patents
Fingerprint recognition structure and display device Download PDFInfo
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- CN108399392A CN108399392A CN201810188447.4A CN201810188447A CN108399392A CN 108399392 A CN108399392 A CN 108399392A CN 201810188447 A CN201810188447 A CN 201810188447A CN 108399392 A CN108399392 A CN 108399392A
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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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- 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
- G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
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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
- 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
- G06V40/1347—Preprocessing; Feature extraction
- G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
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- Computer Vision & Pattern Recognition (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
Abstract
The present invention proposes a kind of fingerprint recognition structure.The fingerprint recognition structure includes：Light source, filtering device and photodetector；Light source is used to provide light for fingerprint, and fingerprint can reflect light；Filtering device is used to filter the reflection light of fingerprint reflection, so that the reflection light of set angle is passed through and is incident upon the setting regions of photodetector, and filtering device has the incidence surface and light-emitting surface being oppositely arranged；Photodetector is set to light-emitting surface, and photodetector is used to detect the light distribution of the reflection light by filtering device, identifies the wave crest and trough of fingerprint.The fingerprint recognition structure can improve the accuracy of fingerprint recognition.
Description
Technical field
Fingerprint identification technology field of the present invention more particularly to a kind of fingerprint recognition structure and the fingerprint recognition structure is installed
Display device.
Background technology
With the development of fingerprint identification technology, it is made to be used widely in numerous areas, in electronic device terminal
Mobile phone, tablet computer and TV etc.；Gate inhibition and safety cabinet in security protection system etc..The realization method of fingerprint collecting mainly has
The technologies such as optical profile type, condenser type and ultrasonic imaging formula, the identification range of wherein optical fingerprint identification technology is relatively large, and at
This is relatively low.
Currently, liquid crystal display (Liquid Crystal Display, abbreviation LCD), organic light emitting diode display
The optical fingerprint identification technology that displays such as (Organic Light-Emitting Diode, abbreviation OLED) use still not at
It is ripe, diffusing reflection fingerprint imaging is mostly usually carried out with backlight, optical imaging device, principle is that backlight illuminates finger as light source
Afterwards, light diffusing reflection is returned imaging detector and is imaged.But since the transmitance of display is relatively low, the photoelectricity in display can be made
Pass that the light energy that receives of detection is relatively low, and there are light interference between trough and wave wave crest in addition so that detecting system is difficult
Fingerprint is identified, causes the accuracy of fingerprint recognition low.
Therefore, it is necessary to study a kind of fingerprint recognition structures and the display device for being equipped with the fingerprint recognition structure.
Above- mentioned information disclosed in the background technology part is only used for reinforcing the understanding of the background to the present invention, therefore it can
With including not constituted the information to the prior art known to persons of ordinary skill in the art.
Invention content
It is an object of the invention to overcome the shortcomings of that the accuracy of the fingerprint recognition of the above-mentioned prior art is low, one kind is provided
The higher fingerprint recognition structure of accuracy and the display device of the fingerprint recognition structure is installed.
The additional aspect and advantage of the present invention will be set forth in part in the description, and partly will be from description
Be apparent from, or can be through the invention practice and acquistion.
According to one aspect of the disclosure, a kind of fingerprint recognition structure is provided, including：Light source, filtering device and photoelectricity
Detector；Wherein,
The light source is used to provide light for fingerprint, and the fingerprint can reflect the light；
The filtering device is used to filter the reflection light of the fingerprint reflection, and the reflection light of set angle is made to pass through simultaneously
It is incident upon the setting regions of the photodetector, the filtering device has the incidence surface and light-emitting surface being oppositely arranged；
The photodetector is set to the light-emitting surface, and the photodetector is used to detect through the filtering device
The light distribution of reflection light identifies the wave crest and trough of the fingerprint.
In a kind of exemplary embodiment of the disclosure, the filtering device includes：
Light blocking ontology；
Multiple transparent areas, array arrangement make the reflection light of set angle pass through in the light blocking ontology, the transparent area
It is incident upon the setting regions of the photodetector.
In a kind of exemplary embodiment of the disclosure, the geometric dimension relationship of the filtering device is：
In formula, W is the aperture of transparent area, and T is the cycle length of transparent area, and d is the thickness of filtering device, and t is fingerprint face
To the distance of the incidence surface.
In a kind of exemplary embodiment of the disclosure, the fingerprint recognition structure further includes：
Optical transport plate is set to the side far from the photodetector of the filtering device, for sending out the light source
The light gone out carries out total reflection conduction, and is contacted with the optical transport plate by the wave crest of fingerprint and export light.
In a kind of exemplary embodiment of the disclosure, the light source is set on the optical transport plate and the incidence surface phase
The one side of friendship.
In a kind of exemplary embodiment of the disclosure, air is provided between the optical transport plate and the filtering device
Gap.
In a kind of exemplary embodiment of the disclosure, the fingerprint recognition structure further includes：
Optical adhesive layer is set between the optical transport plate and the filtering device, and the refractive index of the optical adhesive layer is less than
The refractive index of the optical transport plate.
In a kind of exemplary embodiment of the disclosure, the light source be infrared light supply or visible light source, it is corresponding, it is described
Photodetector is infrared photoelectric detector or visible photodetector.
In a kind of exemplary embodiment of the disclosure, the fingerprint recognition structure further includes：
Display device is liquid crystal display or organic light emitting diode display, and the light source is display device, described
Display device is set to the side far from the photodetector of the filtering device.
According to one aspect of the disclosure, a kind of display device is provided, including：
Fingerprint recognition structure described in above-mentioned any one.
As shown from the above technical solution, the present invention has at least one of following advantages and good effect：
The fingerprint recognition structure of the present invention, including light source, filtering device and photodetector, filtering device can filter
The reflection light of fingerprint reflection, makes the reflection light of set angle pass through and is incident upon the setting regions of photodetector.On the one hand,
The case where filtering device can avoid the reflected light between trough and wave wave crest from interfering with each other, improves the standard of fingerprint recognition
Exactness；On the other hand, the setting regions of photodetector can only be incident upon through the light of filtering device, to further avoid wave
Reflected light interfering with each other on photodetector between peak and trough, further improves the accuracy of fingerprint recognition.
Description of the drawings
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the structural schematic diagram of one example embodiment of fingerprint recognition structure of the present invention；
Fig. 2 is the part-structure schematic diagram of the filtering device in Fig. 1；
Fig. 3 is the structural schematic diagram of the fingerprint true field of the filtering device in Fig. 2；
Fig. 4 is the structural schematic diagram of the fingerprint image space of the filtering device in Fig. 2；
Fig. 5 is the structural schematic diagram of another example embodiment of fingerprint recognition structure of the present invention；
Fig. 6 is the structural schematic diagram of the another example embodiment of fingerprint recognition structure of the present invention.
The reference numerals are as follows for main element in figure：
1, optical transport plate；2, face paste glue；3, frame rubberizing；4, display device；
5, filtering device；51, light blocking ontology；52, transparent area；
6, photodetector；7, frame；8, optical cement；9, infrared light supply；10, fingerprint.
Specific implementation mode
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus will omit their detailed description.
Present invention firstly provides a kind of fingerprint recognition structure, which may include：Light source, filtering device
5 and photodetector 6 etc.；Wherein, the light source is used to provide light for fingerprint 10, and the fingerprint 10 can be by the light
Line is reflected；The filtering device 5 is used to filter the reflection light of the reflection of the fingerprint 10, makes the reflection light of set angle
By and be incident upon the setting regions of the photodetector 6, the filtering device 5 has the incidence surface being oppositely arranged and light extraction
Face；The photodetector 6 is set to the light-emitting surface, and the photodetector 6 is used to detect through the anti-of the filtering device 5
The light distribution for penetrating light identifies the wave crest and trough of fingerprint 10.
The fingerprint recognition structure of the present invention is described in detail below by three example embodiments.
Example embodiment one：
The structural schematic diagram of one example embodiment of fingerprint recognition structure shown in referring to Fig.1.
Fingerprint recognition structure may include the photodetector 6, filtering device 5 and display set gradually from top to bottom
Part 4 etc..
In this example embodiment, photodetector 6 can be touch-control sensing glass (sensor glass), i.e., in glass
Photodetector 6 is set on glass substrate.It can be bonded by optical cement 8 between photodetector 6 and filtering device 5.
In this example embodiment, display device 4 can be used as light source, i.e., fingerprint 10 can be by display device
4 light sent out are reflected.It can be bonded by optical cement 8 between filtering device 5 and display device 4.Display device 4 can be
Self-emitting display for example, display device 4 can be organic light emitting diode display, such as can be micro- light emitting diode
Display (MicroLED), micro- organic light emitting diode display (MicroOLED) etc..
With reference to the part-structure schematic diagram of filtering device 5 shown in Fig. 2.
Filtering device 5 may include light blocking ontology 51 and multiple transparent areas 52.52 array arrangement of multiple transparent areas is in institute
Light blocking ontology 51 is stated, the transparent area 52 makes the reflection light of set angle pass through the setting area for being incident upon the photodetector 6
Domain.
In this example embodiment, light blocking ontology 51 is set as plate, is made of light blocking material.Transparent area 52 is arranged
For through the cylinder of the incidence surface of filtering device 5 and light-emitting surface.Light transmission medium, which can be arranged, in transparent area 52 to set
Light transmission medium is set, and achievees the purpose that light transmission only by the form that through-hole is arranged on light blocking ontology 51.Multiple transparent areas 52
It is arranged in light blocking ontology 51 according to setting periodic array.
It should be noted that not doing excessive restriction to the material of filtering device and production method in the present embodiment, only need
Want can to realize the function of light-blocking part and light transmission part.
Since the aperture of transparent area 52 is smaller, there can only be the reflected light of set angle that could pass through, remaining angle
Reflected light, which is blocked, to be passed through.So as to be sent out the case where avoiding the reflected light between the wave crest of fingerprint and trough from interfering with each other
It is raw.The distance between filtering device 5 and photodetector 6 are certain, and the angle through the light of filtering device 5 is also certain
, therefore, the setting regions of photodetector 6 can only be incident upon through the light of each transparent area 52, to further avoid wave
Reflected light interfering with each other on photodetector 6 between peak and trough.
Structural schematic diagram with reference to the fingerprint true field of filtering device 5 shown in Fig. 3 and optical filter shown in Fig. 4
The structural schematic diagram of the fingerprint image space of part 5.Complete finger print information and the filtering device of relatively small thickness 5 in order to obtain, then
True field size corresponding to each transparent area 52 of filtering device 5 can beImage space size can be：
The geometric dimension relationship of filtering device 5 can be：
In formula, W is the aperture of transparent area 52, and T is the cycle length of transparent area 52, and d is the thickness of filtering device 5, and t is to refer to
To the distance of the incidence surface, h is distance of the light-emitting surface to 5 one side of close filtering device of photodetector 6 in line face.
Such parameter designing principle can guarantee the light beam of the reflection of finger print 10 by 6 corresponding position of photodetector
It receives, and effectively prevents the interference of other fingerprint light beams, improve the accuracy of fingerprint recognition.
Preferably, above-mentioned design parameter t is about 900 μm, W is about 10 μm, T is about 50.92 μm, d is about 300
μm, h be about 50 μm to 100 μm.
Further, fingerprint recognition structure can also include optical transport plate 1, and optical transport plate 1 is set to the separate of filtering device 5
The side of photodetector 6.
In this example embodiment, optical transport plate 1 is transparency glass plate.Optical transport plate 1 is set on display device 4,
It is be bonded by optical cement 8 between optical transport plate 1 and display device 4.The one side of the separate display device 4 of optical transport plate 1 is to refer to
Line contact surface, i.e. finger can press the one side in the separate display device 4 of optical transport plate 1.
Further, fingerprint recognition structure can also include frame 7, and frame 7 can be by optical transport plate 1, light source, optical filter
The side of part 5 and photodetector 6 can prevent optical transport plate 1, light source, filtering device 5 and photodetection in being wrapped in
Device 6 is impaired.
Example embodiment two：
Fig. 5 is the structural schematic diagram of another example embodiment of fingerprint recognition structure of the present invention.
The main distinction of this example embodiment and example embodiment one has at 2 points：First, display device 4 is not as light
Source uses, but is additionally provided with special light source；Second, 1 role of optical transport plate is different.
In this example embodiment, the one side intersected with incidence surface in optical transport plate 1 is arranged in light source.Incidence surface can
Think the upper surface of optical transport plate 1, light-emitting surface can be the lower surface of optical transport plate 1, then, optical transport plate 1 and incidence surface
The one side of intersection can be left side, right side, leading flank or the trailing flank of optical transport plate 1.Therefore, light source can be arranged
In the left side of optical transport plate 1, right side, leading flank or trailing flank.Light source can be visible light source, or infrared light supply
9.Correspondingly, photodetector 6 can be visible light electric explorer, or infrared photoelectric detector.Infrared light supply 9 can be with
To send out the infrared LED light source of near-infrared light beam, since infrared light human eye is invisible, select infrared light supply 9 that can refer to
Line does not influence the normal display of display device 4 when identifying.
In this example embodiment, fingerprint recognition structure further includes optical adhesive layer, optical adhesive layer be set to optical transport plate 1 with
Between display device 4, optical adhesive layer is face paste glue 2, i.e., is bonded in 4 two adjacent surfaces of optical transport plate 1 and display device completely
Together.The refractive index of optical adhesive layer is less than the refractive index of optical transport plate 1, and the refractive index of optical adhesive layer can be about 1.3, when
So, can also be 1.1,1.2, the refractive index of optical adhesive layer needs to coordinate with the refractive index of optical transport plate 1, as long as being less than optical transport plate
1 refractive index.
In this example embodiment, optical transport plate 1 passes through for carrying out total reflection conduction to the light that light source is sent out
The wave crest of fingerprint 10 contacts with optical transport plate 1 and exports light.The light incident light transmission board 1 that light source is sent out.Optical transport plate 1 it is upper
Face is air, and the refractive index of air is less than the refractive index of optical transport plate 1；It is optical adhesive layer, optical adhesive layer below optical transport plate 1
Refractive index be less than optical transport plate 1 refractive index.In the case, as long as the incidence angle of light is more than critical angle, light is meeting
It is totally reflected in optical transport plate 1.
The total reflection that the wave crest of fingerprint can destroy light is propagated.After finger is contacted with optical transport plate 1, at the wave crest of fingerprint 10
It contacts with optical transport plate 1, is not contacted with optical transport plate 1 at the trough of fingerprint 10.Since the refractive index of human skin can be about
It is 1.55, the refractive index of optical transport plate 1 can be about 1.5, and the refractive index of human skin is more than the refractive index of optical transport plate 1,
Therefore, the total reflection requirement in optical transport plate 1 can be destroyed after finger is contacted with optical transport plate 1, at the wave crest of fingerprint 10, be incident upon light
The light contacted at transmission board 1 and the wave crest of fingerprint not will produce total reflection, but project to the wave crest of fingerprint 10, fingerprint 10
Wave crest at can to light reflect generate reflected light.
It should be noted that the refractive index of optical transport plate 1 can also be 1.7, as long as ensure refractive index 1.7 and 1.3 it
Between the incidence angle that can be totally reflected, cannot be totally reflected between refractive index 1.7 and 1.55.If the refraction of optical transport plate 1
Rate takes 1.5, and the refractive index difference of refractive index 1.5 and 1.3 is too small, and the light of most of incident angles can be made all to be unsatisfactory for being totally reflected
Angle, and then the energy that fingerprint takes light can be influenced.Furthermore it is also possible to which the refractive index of human body is less than the refractive index of transmission board 1, very important person
Body skin and the refractive index difference of optical transport plate 1 are smaller, make the medium in refractive index 1.7 (optical transport plate) and refractive index originally
Medium (optical transport plate) and refractive index 1.55 of the angle that can be totally reflected between 1.3 medium (glue-line) in refractive index 1.7
Medium (skin) between total reflection be destroyed.
It is not contacted with optical transport plate 1 at the trough of fingerprint 10, trough has air with optical transport plate 1, is equivalent to light by light
Close medium glass is incident on optically thinner medium air, will not destroy the total reflection requirement in optical transport plate 1, therefore will not generate anti-
Penetrate light.So after using optical transport plate 1, the reflected light that is generated at the wave crest of fingerprint 10 at the trough of fingerprint 10 generation it is anti-
Differing greatly for light is penetrated, the light and shade of the light distribution of the reflection light received and identified by photodetector 6 is more apparent, more holds
It is easy to identify go out fingerprint 10 wave crest and trough.
Example embodiment three：
Fig. 6 is the structural schematic diagram of the another example embodiment of fingerprint recognition structure of the present invention.
The main distinction of this example embodiment and example embodiment two is：Set on optical transport plate 1 and filtering device 5
Between optical adhesive layer be frame rubberizing.
In this example embodiment, frame rubberizing is only bonded the periphery of optical transport plate 1 and filtering device 5, without in bonding
Portion, frame rubberizing be have it is certain thickness, to make to form the air gap between optical transport plate 1 and filtering device 5.The refraction of air
Rate is less than the refractive index of optical transport plate 1, as long as the incidence angle of light is more than critical angle, light can carry out in optical transport plate 1
Total reflection.All light that wherein side enters to optical transport plate 1 will produce total reflection, because by the refraction of side, can make institute
There is the light of incident angle to be all higher than the cirtical angle of total reflection.
The specific identification process of example embodiment three is described in detail below：
Light source is infrared light supply.The upper surface of optical transport plate 1 is touched by finger, human skin refractive index is about 1.55,
More than the refractive index (being about 1.5) of optical transport plate 1, when light is incident on the wave crest of fingerprint 10 by optical transport plate 1, it is equivalent to
Optically denser medium skin is incident on by optically thinner medium glass, so infrared light in optical transport plate 1 can be destroyed at the wave crest of fingerprint 10
The total reflection of beam, makes infrared beam take out and generate reflection by the wave crest of fingerprint 10, and the infrared beam of reflection passes through display
Part 4 and filtering device 5 are received by the corresponding position of photodetector 6.And light is incident on the trough of fingerprint 10 by optical transport plate 1
When, due to having air between the trough and optical transport plate 1 of fingerprint 10, it is equivalent to and optically thinner medium sky is incident on by optically denser medium glass
Gas, so the total reflection of infrared beam in optical transport plate 1 will not be destroyed at the trough of fingerprint 10, therefore no reflected light, by
The difference of reflected light is received and identified the light and shade distribution of light intensity by photodetector 6 between this peaks and troughs generated, in turn
Realize the identification of fingerprint.
Further, the present invention also provides a kind of display device, which includes above-mentioned fingerprint recognition structure.Refer to
The concrete structure of line identification structure is above-mentioned to have been carried out detailed description, and details are not described herein again.
The fingerprint recognition structure of the present invention, including light source, filtering device 5 and photodetector 6, filtering device 5 can
The reflection light that fingerprint 10 reflects is filtered, so that the reflection light of set angle is passed through and is incident upon the setting regions of photodetector 6.
On the one hand, the case where filtering device 5 can avoid the reflected light between the trough of fingerprint and wave crest from interfering with each other, improves
The accuracy of fingerprint recognition；On the other hand, the setting regions of photodetector can only be incident upon through the light of filtering device 5, from
And the interfering with each other on photodetector 6 of the reflected light between wave crest and trough is further avoided, further improve fingerprint
The accuracy of identification.
Above-mentioned described feature, structure or characteristic can be incorporated in one or more embodiment party in any suitable manner
In formula, if possible, it is characterized in discussed in each embodiment interchangeable.In the above description, it provides many specific thin
Section fully understands embodiments of the present invention to provide.It will be appreciated, however, by one skilled in the art that this can be put into practice
The technical solution of invention is without one or more in the specific detail, or other methods, component, material may be used
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid each side of the fuzzy present invention
Face.
The term of " about " " about " is used to be generally represented within the 20% of a given value or range in this specification, preferably
It is within 10%, and is more preferably within 5%.Given quantity is quantity about herein, implies that the feelings in not certain illustrated
Under condition, " about " " about " " substantially " meaning of " general " can be still implied.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As in the component of "lower".Term of other relativities, such as "top" "bottom" " preceding " " rear " " left side " " right side " etc. are also made to have similar
Meaning.When certain structure is in other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or refers to certain structure
It is " direct " to be arranged in other structures, or refer to certain structure and be arranged in other structures by the way that another structure is " indirect ".
In this specification, term "one", " one ", "the" and " described " be indicating that there are one or more elements/groups
At part/etc.；Term "comprising", " comprising " and " having " to indicate the open meaning being included and refer in addition to
The element/component part/listed also may be present except waiting other element/component part/etc..
It should be appreciated that the present invention is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The present invention can have other embodiment, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of the present invention.It should be appreciated that this disclosure and the present invention of restriction extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the present invention.Embodiment described in this specification illustrates to become known for realizing the present invention
Best mode, and will enable those skilled in the art using the present invention.
Claims (10)
1. a kind of fingerprint recognition structure, which is characterized in that including：Light source, filtering device and photodetector；Wherein,
The light source is used to provide light for fingerprint, and the fingerprint can reflect the light；
The filtering device is used to filter the reflection light of the fingerprint reflection, so that the reflection light of set angle is passed through and is incident upon
The setting regions of the photodetector, the filtering device have the incidence surface and light-emitting surface being oppositely arranged；
The photodetector is set to the light-emitting surface, and the photodetector is used to detect the reflection by the filtering device
The light distribution of light identifies the wave crest and trough of the fingerprint.
2. fingerprint recognition structure according to claim 1, which is characterized in that the filtering device includes：
Light blocking ontology；
Multiple transparent areas, in the light blocking ontology, the transparent area makes the reflection light of set angle pass through to be incident upon array arrangement
The setting regions of the photodetector.
3. fingerprint recognition structure according to claim 2, which is characterized in that the geometric dimension relationship of the filtering device
For：
In formula, W is the aperture of transparent area, and T is the cycle length of transparent area, and d is the thickness of filtering device, and t is fingerprint face to institute
State the distance of incidence surface.
4. fingerprint recognition structure according to claim 1, which is characterized in that the fingerprint recognition structure further includes：
Optical transport plate is set to the side far from the photodetector of the filtering device, for what is sent out to the light source
Light carries out total reflection conduction, and is contacted with the optical transport plate by the wave crest of fingerprint and export light.
5. fingerprint recognition structure according to claim 4, which is characterized in that the light source be set to the optical transport plate with
The one side of the incidence surface intersection.
6. fingerprint recognition structure according to claim 4, which is characterized in that the optical transport plate and the filtering device it
Between be provided with the air gap.
7. fingerprint recognition structure according to claim 4, which is characterized in that the fingerprint recognition structure further includes：
Optical adhesive layer is set between the optical transport plate and the filtering device, and the refractive index of the optical adhesive layer is less than described
The refractive index of optical transport plate.
8. fingerprint recognition structure according to claim 1, which is characterized in that the light source is infrared light supply or visible light
Source, corresponding, the photodetector is infrared photoelectric detector or visible photodetector.
9. fingerprint recognition structure according to claim 1, which is characterized in that the fingerprint recognition structure further includes：
Display device, is liquid crystal display or organic light emitting diode display, and the light source is display device, the display
Device is set to the side far from the photodetector of the filtering device.
10. a kind of display device, which is characterized in that including：
Fingerprint recognition structure as described in any one of claim 1 to 9.
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| CN201810188447.4A CN108399392B (en) | 2018-03-07 | 2018-03-07 | Fingerprint identification structure and display device |
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| CN201810188447.4A CN108399392B (en) | 2018-03-07 | 2018-03-07 | Fingerprint identification structure and display device |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109271943A (en) * | 2018-09-27 | 2019-01-25 | 联想(北京)有限公司 | A kind of electronic equipment and information processing method |
| CN110008869A (en) * | 2019-03-25 | 2019-07-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN110287920A (en) * | 2019-06-29 | 2019-09-27 | 厦门天马微电子有限公司 | A kind of display panel and display device |
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