CN109791613A - Optical finger print identifies mould group and electronic equipment - Google Patents
Optical finger print identifies mould group and electronic equipment Download PDFInfo
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- CN109791613A CN109791613A CN201880003185.8A CN201880003185A CN109791613A CN 109791613 A CN109791613 A CN 109791613A CN 201880003185 A CN201880003185 A CN 201880003185A CN 109791613 A CN109791613 A CN 109791613A
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Abstract
The application provides a kind of optical finger print identification mould group and electronic equipment, the optical finger print identifies that mould group includes: optical sensor (302) and optical element (301), and multiple optical apertures (3011) being parallel to each other are opened up on optical element (301), so that handling the light of the digital reflex part refracted light after the prism structure refraction of backlight module (10) passes through the sensitive zones that optical aperture (3011) enter optical sensor (302), the application increases imaging viewing field, improve the quality of fingerprint imaging, so that fingerprint recognition precision is higher.
Description
Technical field
This application involves the optical finger prints under biological identification technology more particularly to a kind of LCD screen to identify that mould group and electronics are set
It is standby.
Background technique
With the development of biological identification technology, bio-identification mould group is equipped in more and more terminals, and (such as optics refers to
Line identifies mould group, iris recognition mould group or recognition of face mould group), wherein the concrete operating principle of bio-identification mould group are as follows: biology
Inductor in identification mould group receives light after organism is reflected and forms skin characteristic image, by skin characteristic image and
The image of storage compares, and completes the functions such as fingerprint recognition, In vivo detection, bio-identification mould group is in the terminal in application, past
It is aobvious in Organic Light Emitting Diode (Organic Light-Emitting Diode, abbreviation OLED) display screen or LCD toward setting
Under display screen.
Currently, optical finger print identification mould group is located at LCD and shows when optical finger print identification mould group is arranged in LCD display
Under screen, specifically, LCD display includes liquid crystal display panel and backlight module, backlight module for liquid crystal display panel for mentioning
For light source, optical finger print identification mould group is located at the side that backlight module deviates from liquid crystal display panel, i.e. backlight module is located at optics
Between fingerprint recognition mould group and liquid crystal display panel, wherein backlight module includes prism film, has prism structure on prism film,
The prism structure is used to collapse the light of centre visual angle, increases the display brightness of positive angle, and optical finger print identifies the work of mould group
Make process are as follows: the light after handling digital reflex is transferred to prism structure, prism structure lateral position through superrefraction and by optics
The inductor of fingerprint recognition mould group receives, formation fingerprint image, and the fingerprint image of fingerprint image and storage compares completion and refers to
Line identification.
However, the light after handling digital reflex passes through prism since the backlight module in LCD display has prism structure
The effective viewing field's reduction and fingerprint image generated that optical finger print identification mould group is easily caused after structure distort, thus not
Conducive to fingerprint recognition.
Summary of the invention
The application provides a kind of optical finger print identification mould group and electronic equipment, increases imaging viewing field, improve fingerprint at
Image quality amount improves the accuracy of fingerprint recognition, and the effective viewing field for solving optical finger print identification mould group under existing LCD screen is reduced
And fingerprint image generated the problem of distorting.
The application provides a kind of optical finger print identification mould group, carries out fingerprint knowledge for being arranged under the backlight module of LCD screen
Not, wherein optical finger print identifies that mould group includes:
Optical sensor and the optical element on the optical sensor, and opened up on the optical element
Multiple optical apertures being parallel to each other, so that the light for handling digital reflex is partially rolled over after the prism structure refraction of the backlight module
Penetrate the sensitive zones that light enters the optical sensor across the optical aperture.
In the specific embodiment of the application, specifically, one of them in the optical element and the optical aperture is in
Heeling condition, and the prism angle phase of the tilt angle of the optical element or the optical aperture and the prism structure
Match.
In the specific embodiment of the application, specifically, the optical element is horizontally set on the optical sensor
On, the optical aperture is the angling hole to match with the prism angle of the prism structure.
In the specific embodiment of the application, specifically, the optical aperture on the optical element is vertical holes, and institute
It states optical element to be obliquely installed on the optical sensor, so that the vertical holes on the optical element is inclined
Shape.
In the specific embodiment of the application, specifically, the optical sensor is oblique, and the optical sensing
Element is parallel with the optical element.
In the specific embodiment of the application, specifically, when the optical aperture or the optical element tilt, the optics
Angle between hole and vertical direction is between 10 ° -50 °.
In the specific embodiment of the application, specifically, the optical element is made of lighttight material.
In the specific embodiment of the application, specifically, the optical aperture on the optical element is vertical holes, it is described
Optical element level is located on the optical sensor, and the inner wall of the optical aperture can be to the refracted light of predetermined angle
It is totally reflected, so that the part refracted light enters the optical sensor after the reflection of the inner wall of the optical aperture
Sensitive zones.
In the specific embodiment of the application, specifically, the optical element is made of optical fiber, so that the optical aperture
Inner wall the refracted light of predetermined angle can be totally reflected.
In the specific embodiment of the application, specifically, the region for opening up the optical aperture on the optical element is greater than
Or the sensitive zones equal to the optical sensor.
In the specific embodiment of the application, specifically, the optical element is located on the optical sensor, and
There is interval between the optical element and the optical sensor.
The application also provides a kind of electronic equipment, includes at least: liquid crystal display panel, backlight module and any of the above-described described
Optical finger print identify mould group, wherein the backlight module is located at the liquid crystal display panel and the optical finger print and identifies mould
Between group.
The backlight module includes prism film, has prism structure, and the prism structure or institute on the prism film
Stating on prism film has for handling the surface that the vertical light after digital reflex vertically penetrates the prism film.
In the specific embodiment of the application, specifically, being set between the two neighboring prism structure on the prism film
Set interval, the interval vertically penetrates the prism film for will handle the vertical light after digital reflex.
In the specific embodiment of the application, specifically, the prism structure includes side and is connected with the side
Top surface, and the top surface is used to handle the vertical light after digital reflex and vertically penetrates the prism film.
In the specific embodiment of the application, specifically, the top surface is plane, alternatively, the top surface outwardly convex
Arc surface.
In the specific embodiment of the application, specifically, the electronic equipment, which has, identifies mould group with the optical finger print
Corresponding finger scan region, the finger scan region are located at the display area or position of the display screen of the electronic equipment
In the non-display area of the electronic equipment.
Optical finger print identification mould group provided by the present application and electronic equipment identify that mould group includes that optics passes by optical finger print
Sensing unit and the optical element on the optical sensor, and multiple be parallel to each other is opened up on the optical element
Optical aperture, the light for handling digital reflex in this way divide the refraction light of special angle at the prism structure refraction rear portion of the backlight module
Line passes through the sensitive zones that the optical aperture enters the optical sensor, fingerprint image is formed, due to opening on optical element
If multiple optical apertures being parallel to each other may be implemented to select the refracted light of special angle, so that optical finger print
It identifies that the fingerprint image that mould group is formed is complete fingerprint image, the shadow region of unglazed line imaging is avoided, to prevent
There is the problem of filaments of sun in the center of fingerprint image, therefore, in the present embodiment, by the way that multiple be parallel to each other is arranged on optical element
Optical aperture, optical aperture realizes the selection of the refracted light to the special angle after prism structure refraction, so that optical sensing is first
Part forms complete fingerprint image according to the light that optical aperture selects, and compared with prior art, increases imaging viewing field, improves
The quality of fingerprint imaging solves optical finger print under LCD screen and knows so that the fingerprint recognition precision of optical finger print identification mould group is higher
The problem of effective viewing field's reduction and fingerprint image generated distort when other mould group generates fingerprint image.
Detailed description of the invention
In order to illustrate the technical solutions in the embodiments of the present application or in the prior art more clearly, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this Shen
Some embodiments please for those of ordinary skill in the art without any creative labor, can be with
It obtains other drawings based on these drawings.
Figure 1A is structural schematic diagram when existing optical finger print identification mould group is arranged in LCD display；
Figure 1B is the schematic diagram that optical finger print identifies the filaments of sun formed in fingerprint imaging in mould group in Figure 1A；
Fig. 1 C is the schematic diagram of the reflection light of fingerprint central area and prism film and prism structure in Figure 1A；
Fig. 1 D is another structural schematic diagram when existing optical finger print identification mould group is arranged in LCD display；
Fig. 1 E is the schematic diagram that optical finger print identifies the filaments of sun formed in fingerprint imaging in mould group in Fig. 1 D；
Fig. 1 F is the schematic diagram of the reflection light of fingerprint central area and two prism films and prism structure in Fig. 1 D；
Fig. 2A is the signal when optical finger print identification mould group that the embodiment of the present application one provides is arranged under LCD display
Figure；
Fig. 2 B is that optical finger print identifies the optical element of mould group and the overlooking structure diagram of prism knot in Fig. 2A；
Light between optical element and prism structure in the optical finger print identification mould group that Fig. 2 C provides for the embodiment of the present application one
The schematic diagram of line refraction；
Fig. 2 D is the another knot when optical finger print identification mould group that the embodiment of the present application one provides is arranged under LCD display
Structure schematic diagram；
Fig. 2 E is the schematic diagram that optical finger print identifies between the optical element and prism structure of mould group in Fig. 2 D；
Fig. 3 is the schematic diagram when optical finger print identification mould group that the embodiment of the present application two provides is arranged under LCD display；
Fig. 4 is the schematic diagram when optical finger print identification mould group that the embodiment of the present application three provides is arranged under LCD display；
Fig. 5 A is the structural schematic diagram for the electronic equipment that the embodiment of the present application four provides；
Fig. 5 B be in the electronic equipment that provides of the embodiment of the present application four optical finger print identify mould group and liquid crystal display panel and
The structural schematic diagram of backlight module；
The prism structure of backlight module and the structure of prism film in the electronic equipment that Fig. 6 A provides for the embodiment of the present application four
Schematic diagram；
Fig. 6 B is the another of the prism structure of backlight module and prism film in the electronic equipment that provides of the embodiment of the present application four
Structural schematic diagram；
Fig. 6 C is the another of the prism structure of backlight module and prism film in the electronic equipment that provides of the embodiment of the present application four
Structural schematic diagram.
Description of symbols:
10- backlight module；11,13- prism film；The flattened region 111-；12,14- prism knot
Structure；
The side 121-；The top surface 122-；101- light；
The vertical reflection light of 101a-；102- refracted light；The shadow region 103-；
20- liquid crystal display panel；30- optical finger print identifies mould group；301- optical element；
3011- optical aperture；302- optical sensor；40- finger.
Specific embodiment
To keep the purposes, technical schemes and advantages of the embodiment of the present application clearer, below in conjunction with the embodiment of the present application
In attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is
Some embodiments of the present application, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall in the protection scope of this application.
As described in background, in the prior art, under LCD display be arranged optical finger print identify mould group 30 when there are
The problem of effect visual field is reduced and fingerprint image generated distorts, through inventor the study found that there is this problem
Reason is: as shown in figs. 1A-1 c, existing optical finger print identification mould group 30 includes optical sensor 31, with diaphragm 33
Lens 32, LCD display include liquid crystal display panel 20 and backlight module 10, and backlight module 10 includes an at least prism film,
Prism film is equipped with prism structure, and wherein in Figure 1A, backlight module 10 includes a prism film 11, has prism on prism film 11
Structure 12 is sent out when the light 101 reflected from 40 fingerprint interface of finger is transferred to prism structure 12 in the side of prism structure 12
The diaphragm 33 that refracted light 102 enters lens 32 after life refraction reaches optical sensor 31 and participates in being imaged, but fingerprint center
The low-angle reflection light (vertical reflection light 101a as is shown in fig. 1C) in domain can be reflected in the not ipsilateral of prism
And the refracted light 102 after the refraction of inclined direction identical side is dissipated outward in a manner of being parallel to each other, the part light in this way
Line cannot be introduced into the diaphragm 33 of lens 32, and eventually leading to the fingerprint image center detected of optical sensor 31 will form one secretly
Item 311 (i.e. dash area in Figure 1B) leads to serious visual field loss and the distortion of fingerprint image, moreover, prism structure 12
The bigger fingerprint imaging center filaments of sun of prism angle it is wider, research it has also been found that, when backlight module 10 include two prism films when,
As shown in Fig. 1 D-1F, respectively prism film 11 and when prism film 13, prism film 13 is equipped with prism structure 14, and prism structure
12 is orthogonal with prism structure 14, at this point, the fingerprint image center detected of optical sensor 31 will form two filaments of sun 311 (such as
Shown in Fig. 1 E) so that visual field loss and the distortion of fingerprint image are more serious.
Based on the above reasons, the present invention provides a kind of optical finger prints to identify mould group 30, combines multiple examples to this as follows
What application embodiment provided is illustrated, and example is as follows:
The optical finger print identification mould group 30 that the following each embodiments of the application provide can be applied to smart phone, notebook electricity
The electronics of optical finger print identification function is set under any screen with LCD such as brain, wearable device, household appliance and access control system
In standby.Optical finger print identification preset regional area can be realized in an lcd under the screen of LCD.
Embodiment one
Fig. 2A is the signal when optical finger print identification mould group that the embodiment of the present application one provides is arranged under LCD display
Figure, Fig. 2 B are that optical finger print identifies that the optical element of mould group and the overlooking structure diagram of prism knot, Fig. 2 C are this Shen in Fig. 2A
Please embodiment one provide optical finger print identification mould group between optical element and prism structure light refraction schematic diagram, Fig. 2 D
Another structural schematic diagram when identifying that mould group is arranged under LCD display for the optical finger print that the embodiment of the present application one provides, figure
2E is the schematic diagram that optical finger print identifies between the optical element and prism structure of mould group in Fig. 2 D.
Referring to fig. 2 shown in A-2C, optical finger print identification mould group 30 is located under LCD display, wherein LCD display includes
Liquid crystal display panel 20 and backlight module 10, wherein the backlight module 10 in Fig. 2A includes a prism film, i.e. prism film 11,
Prism structure 12 is set on prism film 11, and optical finger print identification mould group 30 is particularly located under backlight module 10, the optical finger print
Identify mould group 30 can include: optical sensor 302 and the optical element 301 on optical sensor 302, and optics
Multiple optical apertures 3011 being parallel to each other are opened up on element 301, optical aperture 3011, which can be realized, selects special angle light, in this way
The light 101 reflected through finger 40 reflects the refracted light 102 for dividing special angle in rear portion in the prism structure 12 of backlight module 10
Enter the sensitive zones of optical sensor 302 across optical aperture 3011, optical sensor 302 is according to the light shape received
At fingerprint image.
Wherein, in the present embodiment, the light 101 after the reflection of finger 40 is after the incidence of two sides of prism structure 12, root
Will form two kinds of refracted lights 102 according to incident side difference, and optical aperture 3011 specifically prism structure 12 is reflected after wherein
A kind of refracted light 102 of special angle is selected, and fingerprint image is ultimately formed, and in the prior art, optical sensor 3 connects
When receipts form fingerprint image from the light that the diaphragm 33 of lens 32 enters, a portion fingerprint image is same by prism structure 12
The reflection light of side (such as left side) incidence in direction reaches optical sensor into the diaphragm 33 of lens 32 after reflecting
31 induction zone is formed, and another part fingerprint image is incident by the side (such as right side) of the other direction of prism structure 12
Reflection light is formed after reflecting into the induction zone that the diaphragm 33 of lens 32 reaches optical sensor 31, and fingerprint central area
The filaments of sun 311 are formed since reflection light cannot be introduced into the diaphragm 33 of lens 32 after the refraction of prism structure 12, cause effectively to regard
It reduces and fingerprint image is distorted, and in the present embodiment, two from prism structure 12 of the light 101 that is reflected through finger 40
When side incidence forms two kinds of refracted lights 102, multiple optical apertures 3011 of optical element 301 select one of special angle
Refracted light 102 pass through (as shown in Figure 3), remaining light can not from optical aperture 3011 pass through participate in be imaged, refracted light
102 sensitive zones for entering optical sensor 302 directly form complete fingerprint image, that is, pass through the light of optical element 301
It learns hole 3011 to select the refracted light 102 of the special angle after 12 broken line of prism structure, so that fingerprint image is by prism
The reflection light of 12 one of side incidence of structure is directly formed, and the reflection light of such fingerprint central area is also assisted in into
Picture avoids the shadow region 103 of unglazed line imaging in this way, so as to avoid fingerprint image by 12 two side foldings of prism structure
There is the problem of filaments of sun 311 in the center of fingerprint image when two kinds of refracted lights 102 after penetrating are formed.Wherein, the present embodiment, optics
When hole 3011 selects the refracted light 102 of special angle, special angle refers specifically to some angle, do not include it is a variety of not
Same angle, i.e., in the present embodiment, a kind of refracted light 102 of 3011 pairs of optical aperture unified angles is selected, not existing
There is the refracted light 102 of different angle as shown in Figure 1A in technology to be selected.
So, by the way that optical aperture 3011 is arranged on optical element 301, optical aperture 3011 is realized to rib in the present embodiment
The selection of the refracted light 102 of special angle after the refraction of mirror structure 12, so that optical sensor 302 is according to optical aperture 3011
The light of selection forms complete fingerprint image, compared with prior art, increases imaging viewing field, improves the matter of fingerprint imaging
Amount, so that the fingerprint recognition precision of optical finger print identification mould group 30 is higher.
Wherein, in the present embodiment, the positional relationship between prism structure 12 and optical element 301 is as shown in Figure 2 B, prism
The extending direction (arrow direction in such as Fig. 2 B) and 301 long side extending direction of the optical element (dotted line in such as Fig. 2 B of structure 12
Direction) it is mutually perpendicular to.
Wherein, in the present embodiment, optical element 301 on optical sensor 302 when being arranged, optical element 301 and light
Learning has interval between sensing element 302, i.e. the top that is located at optical sensor 302 of optical element 301, can be with when setting
Optical element 301 is erected at the top of optical sensor 302 by support or optical element 301 passes through optics gluing
On optical sensor 302, it is spaced between optical element 301 and optical sensor 302 by optical cement at this time.
Wherein, the sensitive zones of optical sensor 302 are often consistent with the finger-print region of finger 40, in order to guarantee to refer to
The integrality that line is shown, in the present embodiment, optical element 301 on optical sensor 302 when being arranged, specifically, optics is first
The region that optical aperture 3011 is opened up on part 301 is greater than or equal to the sensitive zones of optical sensor 302, i.e. optical element 301
On for open up optical aperture 3011 area be greater than optical sensor 302 sensitive zones area, may insure light in this way
It learns the light that hole 3011 passes through and enters the fingerprint image that the sensitive zones formation of optical sensor 302 is completed.
Wherein, in the present embodiment, optical sensor 302 is specially optical sensor, and optical sensor implement body can wrap
Optical filter and optical sensor are included, alternatively, optical sensor 31 is specially optical sensor in the present embodiment.
Wherein, in the present embodiment, the light 101 reflected through finger 40 specifically can be by the backlight in backlight module 10
The light of sending project reflected on finger 40 or the present embodiment in, light emitting device can also be separately provided, this shine
Device is for providing the light of fingerprint detection, the reflection of finger 40 of the light that light emitting device issues by pressing on a display screen
Afterwards, it successively is incident to optical sensor 302 by liquid crystal display panel 20, backlight module 10 and optical element 301, in light
The sensitive zones for learning sensing element 302 generate the fingerprint image data for being used for fingerprint recognition, wherein light emitting device is specifically as follows
Infrared light supply interferes fingerprint detection using the visible light that the infrared light supply can avoid display screen as fingerprint light source, guarantees to refer to
The accuracy of line detection.Also, infrared light supply is invisible, will not impact to the display of display screen, that is, is guaranteeing fingerprint inspection
In the case where surveying accuracy, it is also ensured that the display effect of display screen.The infrared light supply can be for example infrared LED light source, red
It is outer vertical cavity surface emitting laser (Vertical Cavity Surface Emitting Laser, abbreviation VCSEL), infrared
Laser diode (Laser Diode) etc..
Optical finger print provided in this embodiment identifies mould group 30, by including optical sensor 302 and passing positioned at optics
Optical element 301 on sensing unit 302, and multiple optical apertures 3011 being parallel to each other are opened up on optical element 301, it passes through in this way
The light 101 that finger 40 reflects reflects rear portion in the prism structure 12 of backlight module 10 and the refracted light 102 of special angle is divided to wear
The sensitive zones that optical aperture 3011 enters optical sensor 302 are crossed, fingerprint image are formed, due to opening up on optical element 301
Multiple optical apertures 3011 being parallel to each other may be implemented to select the refracted light 102 of special angle, so that light
Learning the fingerprint image that fingerprint recognition mould group 30 is formed is complete fingerprint image, avoids the shadow region of unglazed line imaging, from
And the center of fingerprint image is prevented the problem of filaments of sun occur, it is therefore, more by being arranged on optical element 301 in the present embodiment
A optical aperture 3011 being parallel to each other, optical aperture 3011 realize the refracted light of the special angle after reflecting to prism structure 12
102 selection, it is and existing so that optical sensor 302 forms complete fingerprint image according to the light that optical aperture 3011 selects
There is technology to compare, increase imaging viewing field, improve the quality of fingerprint imaging, so that the fingerprint of optical finger print identification mould group 30 is known
Other precision is higher, solves effective viewing field when optical finger print identification mould group 30 generates fingerprint image under LCD screen and reduces and give birth to
At fingerprint image distort the problem of.
Wherein, in the present embodiment, due to the structure qualification of prism structure 12, so that the light 101 after the reflection of finger 40
After the refraction of prism structure 12, refracted light 102 is emitted with certain tilt angle outward, so in the present embodiment, for reality
Now the refracted light of special angle 102 is selected, in the present embodiment, in optical element 301 and optical aperture 3011 wherein
One inclined, and the prism angle phase of the tilt angle of optical element 301 or optical aperture 3011 and prism structure 12
Matching, the refracted light to certain tilt angle may be implemented in optical element 301 inclined in this way or optical aperture 3011
102 are selected, wherein in the present embodiment, due to optical aperture 3011 be to prism structure 12 reflect after refracted light 102 into
Row selection, and the refraction angle of refracted light 102 is related to the prism angle theta of prism structure 12, so, in the present embodiment, it is
Realize that the refracted light 102 after reflecting to prism structure 12 selects, in the present embodiment, optical element 301 or optical aperture
3011 inclined angles will match with the prism angle theta of prism structure 12, and which ensures that reflection lights in prism structure 12
Side refraction after the refracted light 102 of special angle can pass through optical aperture 3011, wherein, can be by optics in the present embodiment
Element 301 is set as skewed, so that optical aperture 3011 is inclined, or directly can be set as inclining by optical aperture 3011
Inclined hole.
In the present embodiment, as shown in Figure 2 A, optical element 301 is horizontally set on optical sensor 302, optical aperture
3011 angling hole to match with the prism angle theta of prism structure 12, i.e., in the present embodiment, optical aperture 3011 is in optical element
When being arranged on 301, angling hole is set by optical aperture 3011, i.e. the inside of optical element 301 is unified inclination fixed angle
Optical aperture 3011, multiple optical apertures 3011 can realize the selection to special angle light, wherein optical aperture 3011 and vertical direction
Between angle β and the prism angle theta of prism structure 12 match, in this way through finger 40 reflection after light 101 in prism knot
After the side refraction of structure 12, the refracted light 102 of special angle can pass through inclined optical aperture 3011.
Wherein, in the present embodiment, when optical aperture 3011 is obliquely installed in optical element 301, specifically, optical aperture 3011
Angle β between vertical direction can be between 10 ° -50 °, for example, in the present embodiment, between optical aperture 3011 and vertical direction
Angle β can be 30 ° or 25 ° etc., wherein in the present embodiment, when in backlight module 10 include single prismatic film 11 when (such as
Shown in Fig. 2A), at this point, the angle β between optical aperture 3011 and vertical direction can be between 10 ° -40 °, wherein prism structure 12
Prism angle theta be generally 90 °, according to refraction principle, as shown in Figure 2 C, vertical incidence light after backlight module 10 go out
Firing angle is 26 °, so, the angle β between optical aperture 3011 and vertical direction can be 26 °, i.e., in the present embodiment, backlight module
When including single prismatic film 11 in 10, the angle β between optical aperture 3011 and vertical direction is preferably 26 °, and works as backlight module
It include prism film 11 and prism film 13 in 10, and prism structure 12 and prism structure 14 are orthogonal, at this moment, at this point, optical aperture 3011
Angle β between vertical direction can be between 20 ° -50 °, and the prism angle theta for working as prism structure 12 and prism structure 14 is equal
When being 90 °, at this point, the angle of emergence of the vertical incidence light after the prism film structured refractive of two films is 36.7 °, so, this
In embodiment, when backlight module 10 includes two prism films, at this point, the angle β between optical aperture 3011 and vertical direction is excellent
It is selected as 36.7 °.
Wherein, in the present embodiment, when backlight module 10 includes prism structure 12 and prism structure 14, at this point, such as Fig. 2 E
Shown, prism structure 12 and prism structure 14 are mutually perpendicular to, and the extending direction of prism structure 14 is (in such as Fig. 2 E on prism structure 14
Arrow shown in) and the long side extending direction (as shown in the dotted line in Fig. 2 E) of optical element 301 between included angle be 30 °~
60 °, such as in the present embodiment, φ can be 45 °.
Wherein, in order to ensure in optical element 301 only have optical aperture 3011 be passed into optical sensor for light
302 sensitive zones, in the present embodiment, optical element 301 is made of lighttight material, is removed on such optical element 301
Zonal ray except optical aperture 3011 can not penetrate, wherein lighttight material is specifically as follows to the absorbable suction of light
Profile material is received, such light, which projects, to be absorbed when not opening up 3011 region of optical aperture on optical element 301 by optical element 301,
It can not be from optical element 301 through the sensitive zones for entering optical sensor 302.
Embodiment two
Fig. 3 is the schematic diagram when optical finger print identification mould group that the embodiment of the present application two provides is arranged under LCD display.
The difference of the present embodiment and above-described embodiment are as follows: shown in Figure 3 in the present embodiment, the light on optical element 301
Hole 3011 is vertical holes, i.e. for optical aperture 3011 when opening up on optical element 301, optical aperture 3011 is vertical with horizontal direction
Straight hole, however, to ensure that optical aperture 3011 selects the refracted light 102 of special angle, in the present embodiment, by light
It learns element 301 to be obliquely installed, the vertical optical aperture 3011 on such optical element 301 tilts specific together with optical element 301
Angle, at this point, the prism angle theta phase of angle β and prism structure 12 between oblique optical aperture 3011 and vertical direction
Matching.
Wherein, in the present embodiment, when by the way that optical element 301 being obliquely installed, as long as optical element 301 is obliquely installed
It can guarantee that multiple vertical optical apertures 3011 tilt together, setting is convenient and can realize to 12 special angle of prism structure
The selection of emergent ray.
Wherein, in the present embodiment, when optical element 301 is obliquely installed, and optical sensor 302 is horizontally disposed with, light
Interval between element 301 and optical sensor 302, which passes through, to be gradually increased, such optical sensor
Sensitive zones on 302 often need to guarantee that the light that optical aperture 3011 passes through enters sensitive zones to optical element 301
Position between optical sensor 302 carries out special consideration, in the present embodiment, in order to facilitate optical element 301 and optics
Sensing element 302 is configured, specifically, as shown in figure 3, optical sensor 302 is also configured as skewed, wherein light
Element 301 is identical as the tilt angle of optical sensor 302, and such optical sensor 302 and optical element 301 are flat
Row, the sensitive zones and 3011 face of optical aperture of optical sensor 302 are arranged, and the light being pierced by from optical aperture 3011 is directly thrown
Be mapped to the sensitive zones of optical sensor 302, be less prone to light that optical aperture 3011 is pierced by due to optical sensor
The distance between 302 is different and light occur and project on the non-sensitive zones of optical sensor 302.
Wherein, in the present embodiment, after vertical optical aperture 3011 tilts special angle setting with optical element 301 together,
Angle β between optical aperture 3011 and vertical direction need to guarantee optical aperture when that is, optical element 301 tilts between 10 ° -50 °
Angle β between 3011 and vertical direction is between 10 ° -50 °, wherein in the present embodiment, between optical aperture 3011 and vertical direction
Angle β can be 26 ° or 36.7 ° etc..
Embodiment three
Fig. 4 is the schematic diagram when optical finger print identification mould group that the embodiment of the present application three provides is arranged under LCD display.
The difference of the present embodiment and above-described embodiment are as follows: shown in Figure 4 in the present embodiment, the light on optical element 301
Hole 3011 is vertical holes, i.e., optical aperture 3011 is straight hole in optical element 301, and 301 level of optical element is located at optics biography
On sensing unit 302, in order to realize that the refracted light 102 to special angle selects, in the present embodiment, optical aperture 3011
Inner wall be configured to can the refracted light 102 to predetermined angle be totally reflected, i.e., in the present embodiment, the inner wall of optical aperture 3011
Have the characteristic of total reflection to the refracted light 102 of special angle, can targetedly select incident ray in this way, only meet
The light of total reflection condition could reach the sensitive zones of optical sensor 302 through optical element 301, form fingerprint image
Picture.
In the present embodiment, by the way that the inner wall of optical aperture 3011 is had total reflection characteristic, it is achieved and prism film 11 is gone out
The selection of light is penetrated, to avoid the shadow region of unglazed line imaging, improves fingerprint imaging quality, is conducive to increase imaging view
?.
Wherein, in the present embodiment, the angle of total reflection of optical aperture 3011 matches with the prism angle theta of prism structure 12, this
The refracted light 102 of special angle after the refraction of sample prism structure 12 can be totally reflected into optical sensing by optical aperture 3011
The sensitive zones of element 302.
Wherein, in order to realize the characteristic of 3011 inner wall of optical aperture total reflection, in the present embodiment, optical element 301 is specifically adopted
It is made of optical fiber, since fiber optic materials have the performance of total reflection, so when opening up optical aperture 3011 on optical element 301, light
The inner wall for learning hole 3011 can realize total reflection characteristic, i.e., in the present embodiment, material and upper embodiment one that optical element 301 is selected
It is different with the material of embodiment two, it should be noted that in the present embodiment, the material of optical element 301 includes but is not limited to light
Fibre, the material that can also can be totally reflected using other.
Example IV
Fig. 5 A is the structural schematic diagram for the electronic equipment that the embodiment of the present application four provides, and Fig. 5 B is that the embodiment of the present application four mentions
The structural schematic diagram of optical finger print identification mould group and liquid crystal display panel and backlight module, Fig. 6 A are this Shen in the electronic equipment of confession
Please example IV provide electronic equipment in the prism structure of backlight module and the structural schematic diagram of prism film, Fig. 6 B be the application
The prism structure of backlight module and the another structural schematic diagram of prism film in the electronic equipment that example IV provides, Fig. 6 C are this Shen
Please example IV provide electronic equipment in the prism structure of backlight module and another structural schematic diagram of prism film.
The present embodiment provides a kind of electronic equipment 100, the electronic equipment 100 be specially smart phone, laptop, can
Any electronic equipment 100 with LCD display such as wearable device, household appliance and access control system, wherein the present embodiment
In, it as indicated by figures 5 a-5b, includes at least: the optical finger print of liquid crystal display panel 20, backlight module 10 and any of the above-described embodiment
Identify mould group 30, wherein backlight module 10 is located between liquid crystal display panel 20 and optical finger print identification mould group 30, wherein this
In embodiment, optical finger print identifies that the structure of mould group 30 with specific reference to above-described embodiment, repeats no more in the present embodiment.
Wherein, in the present embodiment, backlight module 10 includes single prismatic film 11, alternatively, backlight module 10 includes two ribs
Mirror film, respectively prism film 11 and prism film 13, prism film 11 are equipped with prism structure 12, and prism film 13 is equipped with prism structure
14, prism structure 12 is orthogonal with prism structure 14, wherein a prism film 11 and prism are only shown in the present embodiment, in Fig. 5 B
The structure of structure 12, two prism films and two prism structures can be with reference to shown in Fig. 2 D and Fig. 2 E, wherein backlight module 10 is also
Including the other structures such as light guide plate and backlight, the other structures of backlight module 10 can refer to the prior art, in the present embodiment
It repeats no more.
Electronic equipment 100 provided in this embodiment is realized by including that above-mentioned optical finger print identifies mould group 30 to prism
The selection of the refracted light 102 of special angle after the refraction of structure 12, so that optical sensor 302 is selected according to optical aperture 3011
The light selected forms complete fingerprint image, compared with prior art, increases imaging viewing field, improves the matter of fingerprint imaging
Amount, so that the fingerprint recognition precision of optical finger print identification mould group 30 is higher, therefore, electronic equipment 100 provided in this embodiment is real
High-precision fingerprint recognition is showed, has solved effective viewing field when optical finger print identification mould group 30 generates fingerprint image under LCD screen and subtract
The problem of less and fingerprint image generated distorts.
Wherein, in the prior art, due to the structure qualification of prism structure 12, so that the vertical reflected light reflected through finger 40
Line 101a the side of prism structure 12 can not vertically into prism structure 12, so, when optical finger print identification mould group 30
When structure is as shown in Figure 4, optical element 301 need to be made of optical fiber, the inner wall of such optical aperture 3011 has total reflection
Characteristic, when still selecting fiber optic materials to the refracted light 102 of special angle, higher cost, so in order to realize in optics member
Part 301 does not use optical fiber to be made, and optical finger print as shown in Figure 4 is still selected to identify that mould group 30 carries out the mesh of selection to light
, in the present embodiment, prism structure 12 is changed, specifically, having on prism structure 12 or prism film 11 for warp
Vertical light after the reflection of finger 40 vertically penetrates the surface of prism film 11, i.e., in the present embodiment, prism structure 12 or prism film
11 may be implemented the purpose of vertical reflection light 101a vertical incidence on prism structure 12 or prism film 11, in this way from prism film
The vertical light of 11 outgoing can be passed into sensitive zones from vertical optical aperture 3011, so, in the present embodiment, by right
The change of prism film 11 or prism structure 12, so that optical finger print identifies that mould group 30 does not use optical fiber to be made in optical element 301
And optical element 301 and optical aperture 3011 be not obliquely installed under the premise of still realize and increase imaging viewing field and raising
The purpose of fingerprint imaging quality.
In the present embodiment, as shown in Figure 6A, interval is set, interval is used on prism film 11 between two neighboring prism structure 12
In the vertical light after the reflection of finger 40 is vertically penetrated prism film 11, i.e., in the present embodiment, portion is reserved between prism array
The vertical transmission for dividing flattened region 111 to realize vertical incidence light, light vertical in this way can be from portions reserved between prism array
111 vertical incidence of flattened region divided, at this point, optical element 301 and optical aperture 3011 in optical finger print identification mould group 30 are not
With being obliquely installed, while the optical aperture 3011 of optical element 301 does not need the characteristic for having total reflection, so, in the present embodiment,
Optical element 301 can be made of light-proof material, and 301 level of optical element is located on optical sensor 302, optical aperture
3011 be straight hole.
Alternatively, as shown in figures 6 b-6 c, prism structure 12 includes side 121 and is connected with side 121 in the present embodiment
Top surface 122, and top surface 122 is used to the vertical light after the reflection of finger 40 vertically penetrating prism film 11, i.e., in the present embodiment,
Prism structure 12 includes side 121 and top surface 122, and the vertical reflection light 101a after the reflection of finger 40 can at top surface 122
To realize vertical incidence, vertical reflection light 101a enters optical sensing from vertical 3011 place of wearing of optical aperture by prism film 11
The sensitive zones of element 302 carry out fingerprint imaging.
Wherein, in the present embodiment, as shown in Figure 6B, top surface 122 is plane, the vertical reflected light reflected in this way through finger 40
Line 101a vertical incidence at the plane of prism structure 12, alternatively, as shown in Figure 6 C, the arc surface of 122 outwardly convex of top surface, warp
The vertical reflection light 101a that finger 40 reflects vertical incidence at the arc top surface 122 of prism structure 12.
Wherein, in the present embodiment, as shown in Figure 5A, electronic equipment 100 has corresponding with optical finger print identification mould group 30
Finger scan region 120, in use, user's finger 40, which can be placed on finger scan region 120, identifies mould group by optical finger print
30 are identified.
Wherein, fingerprint scanning area 120 can be located at the display for showing screen 110 of electronic equipment 100 in the present embodiment
On region (as shown in Figure 5A), for example, finger scan region 120 can be set in the bottom end of display screen 110, such user can
Directly to carry out fingerprint input in the display area of display screen 110；Alternatively, finger scan region 120 may be located on electronics
On the non-display area of device, for example, finger scan region 120 can be located on the shell front or the back side of electronic equipment 100,
Or electronic equipment 100 be mobile phone when, finger scan region 120 is located on Home key, in the present embodiment, finger scan region
120 can be independent button area.
Wherein, in the present embodiment, the shape in finger scan region 120 include but is not limited to it is round, rectangular, oval or
Irregular figure.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should broadly understood, for example, it may be being fixedly connected, be also possible to indirectly connected through an intermediary, can be with
It is the interaction relationship of the connection or two elements inside two elements.For the ordinary skill in the art,
The specific meanings of the above terms in the present invention can be understood according to specific conditions.
In the description of the present invention, it is to be understood that, term " on ", "lower", "front", "rear", "vertical", "horizontal",
The orientation or positional relationship of the instructions such as "top", "bottom", "inner", "outside" are to be based on the orientation or positional relationship shown in the drawings, only
It is for the convenience of describing the present invention and simplifying the description, rather than to indicate or imply that signified device or element must have spy
Fixed orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In description of the invention
In, the meaning of " plurality " is two or more, accurately specifically provide unless otherwise.
The description and claims of this application and term " first ", " second ", " third ", " in above-mentioned attached drawing
The (if present)s such as four " are to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should manage
The data that solution uses in this way are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be to remove
Sequence other than those of illustrating or describe herein is implemented.In addition, term " includes " and " having " and theirs is any
Deformation, it is intended that cover it is non-exclusive include, for example, containing the process, method of a series of steps or units, system, production
Product or equipment those of are not necessarily limited to be clearly listed step or unit, but may include be not clearly listed or for this
A little process, methods, the other step or units of product or equipment inherently.
Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention., rather than its limitations；To the greatest extent
Pipe present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: its according to
So be possible to modify the technical solutions described in the foregoing embodiments, or to some or all of the technical features into
Row equivalent replacement；And these are modified or replaceed, various embodiments of the present invention technology that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (17)
1. a kind of optical finger print identifies mould group, fingerprint recognition, feature are carried out for being arranged under the backlight module (10) of LCD screen
It is, comprising:
Optical sensor (302) and the optical element (301) being located on the optical sensor (302), and the light
It learns and opens up multiple optical apertures (3011) being parallel to each other on element (301), so as to handle the light of digital reflex in the backlight mould
Part refracted light passes through the optical aperture (3011) into the optical sensor after the prism structure refraction of group (10)
(302) sensitive zones.
2. optical finger print according to claim 1 identifies mould group, which is characterized in that the optical element (301) and described
One of them in optical aperture (3011) is inclined, and the optical element (301) or the optical aperture (3011)
Tilt angle and the prism angle of the prism structure match.
3. optical finger print according to claim 2 identifies mould group, which is characterized in that optical element (301) level is set
It sets on the optical sensor (302), the optical aperture (3011) is the prism angle phase with the prism structure
The angling hole matched.
4. optical finger print according to claim 2 identifies mould group, which is characterized in that the institute on the optical element (301)
Stating optical aperture (3011) is vertical holes, and the optical element (301) is tilted on the optical sensor (302) and set
It sets, so that the vertical holes on the optical element (301) is oblique.
5. optical finger print according to claim 4 identifies mould group, which is characterized in that the optical sensor (302) is in
It is skewed, and the optical sensor (302) is parallel with the optical element (301).
6. identifying mould group according to any optical finger print of claim 2-5, which is characterized in that the optical aperture (3011) or
When the optical element (301) is obliquely installed, the angle between the optical aperture (3011) and vertical direction is between 10 ° -50 °.
7. -6 any optical finger prints identify mould group according to claim 1, which is characterized in that the optical element (301)
It is made of lighttight material.
8. optical finger print according to claim 1 identifies mould group, which is characterized in that the institute on the optical element (301)
Stating optical aperture (3011) is vertical holes, and optical element (301) level is located on the optical sensor (302), and
The inner wall of the optical aperture (3011) be configured to can the broken line light to predetermined angle be totally reflected so that the part roll over
Linear light line enters the sensitive zones of the optical sensor (302) after the reflection of the inner wall of the optical aperture (3011).
9. optical finger print according to claim 8 identifies mould group, which is characterized in that the optical element (301) uses light
Fibre is made so that the inner wall of the optical aperture (3011) can to predetermined angle broken line light total reflection.
10. -9 any optical finger prints identify mould group according to claim 1, which is characterized in that the optical element (301)
On open up the optical aperture (3011) region be greater than or equal to the optical sensor (302) sensitive zones.
11. -9 any optical finger prints identify mould group according to claim 1, which is characterized in that the optical element (301)
On the optical sensor (302), and between the optical element (301) and the optical sensor (302)
With interval.
12. a kind of electronic equipment, which is characterized in that the electronics setting includes at least: liquid crystal display panel (20), backlight module
(10) and the described in any item optical finger prints of the claims 1-11 identify mould group (30), wherein the backlight module (10)
Between the liquid crystal display panel (20) and optical finger print identification mould group (30).
13. electronic equipment according to claim 12, which is characterized in that the backlight module (10) includes prism film
(11), there are prism structure (12) on the prism film (11), and on the prism structure (12) or the prism film (11)
With for handling the surface that the vertical light after digital reflex vertically penetrates the prism film (11).
14. electronic equipment according to claim 13, which is characterized in that the two neighboring rib on the prism film (11)
Interval is set between mirror structure (12), and the interval vertically penetrates the prism film for will handle the vertical light after digital reflex
(11)。
15. electronic equipment according to claim 13, which is characterized in that the prism structure (12) includes side (121)
The top surface (122) being connected with the side (121), and the top surface (122) are used to that the vertical light after digital reflex will to be handled
Vertically penetrate the prism film (11).
16. electronic equipment according to claim 15, which is characterized in that the top surface (122) is plane, alternatively, described
The arc surface of top surface (122) outwardly convex.
17. any electronic equipment of 2-16 according to claim 1, which is characterized in that the electronic equipment have with it is described
Optical finger print identifies that mould group (30) corresponding finger scan region (120), the finger scan region (120) are located at the electronics
The display area of the display screen (110) of equipment or non-display area positioned at the electronic equipment.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/125788 WO2020133479A1 (en) | 2018-12-29 | 2018-12-29 | Optical fingerprint identification module and electronic device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109791613A true CN109791613A (en) | 2019-05-21 |
Family
ID=66500798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880003185.8A Pending CN109791613A (en) | 2018-12-29 | 2018-12-29 | Optical finger print identifies mould group and electronic equipment |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109791613A (en) |
| WO (1) | WO2020133479A1 (en) |
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| CN110175592A (en) * | 2019-05-31 | 2019-08-27 | 上海天马微电子有限公司 | A kind of display panel and its driving method and display device |
| CN110441946A (en) * | 2019-08-16 | 2019-11-12 | 京东方科技集团股份有限公司 | A kind of display panel and its driving method and display device |
| CN111095287A (en) * | 2019-08-08 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
| CN111144385A (en) * | 2020-01-21 | 2020-05-12 | 上海思立微电子科技有限公司 | Fingerprint imaging unit and electronic equipment |
| CN111837130A (en) * | 2019-09-20 | 2020-10-27 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, backlight unit, liquid crystal display and electronic equipment |
| WO2021022560A1 (en) * | 2019-08-08 | 2021-02-11 | 深圳市汇顶科技股份有限公司 | Fingerprint detection apparatus and electronic device |
| CN112399040A (en) * | 2019-08-16 | 2021-02-23 | 印象认知（北京）科技有限公司 | Divide visual field imaging module and terminal equipment |
| WO2021103888A1 (en) * | 2019-11-25 | 2021-06-03 | 华为技术有限公司 | Liquid crystal display apparatus |
| WO2022016445A1 (en) * | 2020-07-23 | 2022-01-27 | 3M Innovative Properties Company | Electronic device with optical sensor module |
| US11531430B2 (en) | 2019-07-12 | 2022-12-20 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint detection apparatus and electronic device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110175592A (en) * | 2019-05-31 | 2019-08-27 | 上海天马微电子有限公司 | A kind of display panel and its driving method and display device |
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| CN111095287B (en) * | 2019-08-08 | 2023-09-12 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
| CN111095287A (en) * | 2019-08-08 | 2020-05-01 | 深圳市汇顶科技股份有限公司 | Optical fingerprint device and electronic equipment |
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| CN110441946A (en) * | 2019-08-16 | 2019-11-12 | 京东方科技集团股份有限公司 | A kind of display panel and its driving method and display device |
| CN111837130A (en) * | 2019-09-20 | 2020-10-27 | 深圳市汇顶科技股份有限公司 | Fingerprint identification device, backlight unit, liquid crystal display and electronic equipment |
| WO2021103888A1 (en) * | 2019-11-25 | 2021-06-03 | 华为技术有限公司 | Liquid crystal display apparatus |
| CN111144385A (en) * | 2020-01-21 | 2020-05-12 | 上海思立微电子科技有限公司 | Fingerprint imaging unit and electronic equipment |
| CN111144385B (en) * | 2020-01-21 | 2023-06-20 | 上海思立微电子科技有限公司 | Fingerprint imaging unit and electronic equipment |
| WO2022016445A1 (en) * | 2020-07-23 | 2022-01-27 | 3M Innovative Properties Company | Electronic device with optical sensor module |
| US11954939B2 (en) | 2020-07-23 | 2024-04-09 | 3M Innovative Properties Company | Electronic device with optical sensor module |
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| WO2020133479A1 (en) | 2020-07-02 |
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