CN109690372A - Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal - Google Patents
Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal Download PDFInfo
- Publication number
- CN109690372A CN109690372A CN201880002695.3A CN201880002695A CN109690372A CN 109690372 A CN109690372 A CN 109690372A CN 201880002695 A CN201880002695 A CN 201880002695A CN 109690372 A CN109690372 A CN 109690372A
- Authority
- CN
- China
- Prior art keywords
- light
- panel
- backlight module
- liquid crystal
- light source
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/005—Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
- G02B6/0053—Prismatic sheet or layer; Brightness enhancement element, sheet or layer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0056—Means for improving the coupling-out of light from the light guide for producing polarisation effects, e.g. by a surface with polarizing properties or by an additional polarizing elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
- G02F1/133607—Direct backlight including a specially adapted diffusing, scattering or light controlling members the light controlling member including light directing or refracting elements, e.g. prisms or lenses
Abstract
The application provides a kind of backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal.Backlight module, it include: light-permeable structure, the fingerprint recognition mould group that light-permeable structure is used to that the light of the close panel side of backlight module to be made to be through to the backlight module other side, light-permeable structure includes the light guide plate, diffusion barrier and reflectance coating being stacked, and diffusion barrier is between light guide plate and reflectance coating and is located at away from the side of panel.The backlight module of the application, liquid crystal module, fingerprint identification device and mould group, mobile terminal can improve the clarity of fingerprint image when carrying out fingerprint recognition.
Description
Technical field
The invention relates to touch detection technical more particularly to a kind of backlight module, liquid crystal module, fingerprint recognition dresses
It sets and mould group, mobile terminal.
Background technique
As the electronic devices such as mobile phone shield the arrival in epoch comprehensively, shield lower fingerprint (also referred to as light sensation screen fingerprint recognition) technology
Using more and more extensive, wherein the most universal with fingerprint under optical profile type screen.Shield the principle of lower fingerprint technique are as follows: when finger contacts
When screen, the light that screen issues penetrates cover board and illuminates fingerprint texture, and fingerprint reflection light penetrates screen Returning sensor, most
End form is identified at fingerprint image.
LCD Panel (Liquid Crystal Display, LCD) includes liquid crystal module and backlight module.Liquid crystal mould
The working principle of group is to place liquid crystal molecule in the parallel glass substrate of two panels, is controlled whether by being powered to glass substrate
Liquid crystal molecule processed changes direction, and the light refraction of backlight module is come out and generates picture.LCD screen does fingerprint recognition or face is known
Not, it needs that excitation light source is arranged, is distinguished for the visible light needed for being shown with screen.
Diffusion barrier is usually impermeable infrared, and still, diffusion barrier needs thoroughly infrared material, the material when LCD screen does fingerprint recognition
Material is larger to the signal mist degree of excitation light source, and when LCD screen application being made to shield lower fingerprint technique, the fingerprint image of identification is obscured.
Summary of the invention
The embodiment of the present application provides a kind of backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal, with
When solving fingerprint technique under LCD screen application screen in the prior art, the fuzzy technical problem of the fingerprint image of identification.
In a first aspect, the embodiment of the present application provides a kind of backlight module, comprising: light-permeable structure, the light-permeable structure
For making the light of the close panel side of the backlight module be through to the fingerprint recognition mould group of the backlight module other side,
The light-permeable structure includes the light guide plate, diffusion barrier and reflectance coating being stacked, the diffusion barrier be located at the light guide plate and
Between the reflectance coating and it is located at away from the side of the panel.
As a kind of optional mode, backlight module provided by the embodiments of the present application further includes and the light-permeable structure
Be stacked can not translucent construction, it is described to have loophole on translucent construction.
As a kind of optional mode, backlight module provided by the embodiments of the present application, it is described can not translucent construction include mending
Strong plate, the stiffening plate are located at the side away from the panel of the reflectance coating.
As a kind of optional mode, backlight module provided by the embodiments of the present application further includes prism film, the prism film
On the light guide plate, the prism film and the diffusion barrier are located at the opposite sides of the light guide plate.
As a kind of optional mode, backlight module provided by the embodiments of the present application has multiple ribs on the prism film
Mirror body, the wedge angle of the prism towards the panel are obtuse angle.
As a kind of optional mode, backlight module provided by the embodiments of the present application, the prism is towards the panel
Wedge angle angle be 91~175 °.
As a kind of optional mode, backlight module provided by the embodiments of the present application, the angle of the wedge angle is 100 °,
110 ° or 120 °.
As a kind of optional mode, backlight module provided by the embodiments of the present application also has polarisation on the prism film
Layer, the polarizing layer and the prism are located at the opposite two sides of the prism film.
Second aspect, the embodiment of the present application provide a kind of liquid crystal module, including panel and above-mentioned backlight module；
The panel includes first substrate, the second substrate, layer of liquid crystal molecule；
The first substrate is parallel with the second substrate, and the layer of liquid crystal molecule is located at the first substrate and described
Between two substrates, the backlight module is located at below the second substrate.
As a kind of optional mode, liquid crystal module provided by the embodiments of the present application further includes first light source, and described first
Light source is for illuminating the panel.
The third aspect, the embodiment of the present application provide a kind of fingerprint identification device, including fingerprint recognition mould group and above-mentioned liquid
Brilliant mould group, the fingerprint recognition mould group include fingerprint recognition chip, optical lens, and the optical lens is located at the fingerprint recognition
Between chip and the liquid crystal module.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application further includes second light source, described
Second light source is for making the panel reflection fingerprint image.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, described in the liquid crystal module
The distance between diffusion barrier and the first substrate are 1.63~1.68mm.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, the second light source light source
The panel of incident direction and the liquid crystal module has angle.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, second light source light source position
In the side of the panel.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, second light source light source position
In the lower section of the panel.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, the panel it is opposite first
The distance between side and second side are greater than opposite the distance between the first side and second side of the backlight module, the panel
First side is concordant with the first side of the backlight module.
As a kind of optional mode, fingerprint identification device provided by the embodiments of the present application, the second light source is infrared
Light source.
Fourth aspect, the embodiment of the present application provide a kind of mobile terminal, including above-mentioned fingerprint identification device.
5th aspect, the embodiment of the present application provides a kind of fingerprint recognition mould group, applied to above-mentioned liquid crystal module
Mobile terminal, wherein the fingerprint recognition mould group includes fingerprint recognition chip and optical lens, and the optical lens is located at described
Between fingerprint recognition chip and the liquid crystal module.
Backlight module provided by the embodiments of the present application, liquid crystal module, fingerprint identification device and mould group, mobile terminal, backlight
Mould group is by setting light-permeable structure, and light-permeable structure is for making the light of the close panel side of backlight module be through to backlight
The fingerprint recognition mould group of the mould group other side.Light-permeable structure includes the light guide plate, diffusion barrier and reflectance coating being stacked, and will be spread
Film is arranged in away from the side of panel, i.e. diffusion barrier is close to fingerprint recognition mould group, in this way, can improve when carrying out fingerprint recognition
The clarity of 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.
Fig. 1 is a kind of structural schematic diagram of backlight module provided by the embodiments of the present application；
Fig. 2 is the position view one of diffusion barrier and fingerprint recognition mould group；
Fig. 3 is the position view two of diffusion barrier and fingerprint recognition mould group；
Fig. 4 is the structural schematic diagram of prism film in a kind of backlight module provided by the embodiments of the present application；
Fig. 5 is refraction diagram of a kind of prism film to light in the prior art；
Fig. 6 be in a kind of backlight module provided by the embodiments of the present application prism film to the refraction diagram of light；
Fig. 7 is a kind of structural schematic diagram of liquid crystal module provided by the embodiments of the present application；
Fig. 8 is a kind of structural schematic diagram of fingerprint identification device provided by the embodiments of the present application；
Fig. 9 is a kind of structural schematic diagram of mobile terminal provided by the embodiments of the present application；
Figure 10 is a kind of structural schematic diagram of fingerprint recognition mould group provided by the embodiments of the present application.
Description of symbols:
10-backlight modules；101-light guide plates；102-diffusion barriers；103-reflectance coatings；104-stiffening plates；105-ribs
Mirror film；1051-prisms；1052-wedge angles；1053-incidence angles；1054- incident light；
20-liquid crystal modules；201-panels；202-first substrates；203-the second substrates；204-layer of liquid crystal molecule；
30-fingerprint identification devices；301,60-fingerprint recognition mould group；3011-fingerprint recognition chips；3012-optical frames
Head；302-second light sources；
40,50-mobile terminal.
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.
The description and claims of this application and term " first ", " second ", " third " and " 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 as to embodiments herein described herein can in addition to
Here the sequence other than those of diagram or description is implemented.
In addition, term " includes " and " having " and their any deformation, it is intended that covering non-exclusive includes example
Such as, the process, method, system, product or equipment for containing a series of steps or units those of are not necessarily limited to be clearly listed
Step or unit, but may include being not clearly listed or intrinsic for these process, methods, product or equipment other
Step or unit.
The principle of luminosity of LCD screen are as follows: the filling liquid crystal material between two blocks of parallel-plates changes liquid crystal material by voltage
The arrangement situation of interior molecules, image deep mixed to show to achieve the purpose that shading and light transmission, in picturesque disorder, two
The filter layer of three-primary colours is added between block plate, so that it may realize display chromatic image.
Shield the principle of lower fingerprint technique are as follows: when finger contact screen, the light that screen issues, which will penetrate screen surface, to be referred to
Line texture illuminates, and fingerprint reflection light penetrates screen Returning sensor, ultimately forms fingerprint image to be identified.
LCD Panel (Liquid Crystal Display, LCD) includes liquid crystal module and backlight module.Liquid crystal mould
The working principle of group is to place liquid crystal molecule in the parallel glass substrate of two panels, is controlled whether by being powered to glass substrate
Liquid crystal molecule processed changes direction, and the light refraction of backlight module is come out and generates picture.LCD screen does fingerprint recognition or face is known
Not, it needs that excitation light source is arranged, is distinguished for the visible light needed for being shown with screen.But diffusion barrier is usually impermeable infrared, but
Diffusion barrier is needed using thoroughly infrared material when LCD screen does fingerprint recognition, and the material is larger to the signal mist degree of excitation light source, is made
When lower fingerprint technique is shielded in LCD screen application, the fingerprint image of identification is fuzzy.
Wherein, mist degree (haze) is the percentage for deviateing the transmitted light conversion total transmission light intensity at 2.5 ° of angles of incident light or more,
Mist degree means that more greatly film gloss and transparency especially imaging degree decline.
So backlight module provided by the present application, it is intended to solve the technical problem as above of the prior art.
Backlight module provided by the embodiments of the present application is described in detail in conjunction with multiple examples as follows.
Fig. 1 is a kind of structural schematic diagram of backlight module provided by the embodiments of the present application.As shown in Figure 1, the application is implemented
Example provides a kind of backlight module 10, comprising: light-permeable structure, light-permeable structure are used to make the close panel 201 of backlight module 10
The light of side is through to the fingerprint recognition mould group 30 of 10 other side of backlight module, and light-permeable structure includes the leaded light being stacked
Plate 101, diffusion barrier 102 and reflectance coating 103, diffusion barrier 102 is between light guide plate 101 and reflectance coating 103 and is located at away from face
The side of plate 201.
Specifically, the relative position between light-permeable structure and panel 201 and fingerprint recognition mould group 30 are as follows: panel 201, can
Translucent construction and fingerprint recognition mould group 30 in Fig. 2 according to successively arranging under upper, and diffusion barrier 102 is close to fingerprint recognition mould group
30, light guide plate 101 is close to panel 201.
Wherein, light guide plate 101 is used to guide the scattering direction of light, for improving the brightness of panel 201, and makes panel 201
Brightness it is more uniform.Light guide plate 101 is using the production of the method for printing-type and non-printing formula (ejection formation).For example, light guide plate
Propylene is pressed into the smooth plate in surface using the method for ejection formation by 101, and then using has high reflection and the not material of extinction
Material, in the bottom surface of light guide plate 101, the mode of screen painting stamps diffusion point.Specifically, the printing-type of light guide plate 101 and non-print
Brush to be referred in the prior art, the present embodiment is not limited thereto.
Light guide plate 101 with a thickness of 0.34~0.36mm.Specifically, light guide plate 101 with a thickness of 0.35mm.
Reflectance coating 103 is used to the light that 101 bottom surface of light guide plate leaks out being reflected back light guide plate 101, prevents light source from leaking outside, to mention
The utilization rate of high light source.Reflectance coating 103 can use PET or PC substrate.
Reflectance coating 103 with a thickness of 0.09~0.11mm.Specifically, reflectance coating 103 with a thickness of 0.1mm.
Diffusion barrier 102 provides uniform, soft for correcting from the irradiant direction of propagation of light guide plate 101 for panel 201
Light.Diffusion barrier 102 can use PET or PC substrate.
Diffusion barrier 102 with a thickness of 0.04~0.06mm.Specifically, diffusion barrier 102 with a thickness of 0.05mm.
It should be noted that the light source for illuminating panel 201 is different from the light source of fingerprint recognition is carried out, that is to say, that description
Light be light that light source when carrying out fingerprint recognition issues, described in light guide plate 101, diffusion barrier 102 and reflectance coating 103
Light is the light for illuminating the light source of panel 201 and issuing.
Below for shielding lower fingerprint imaging, be described in detail the optical signals of 102 pairs of diffusion barrier light sources when carrying out fingerprint recognition at
The influence of picture.Fig. 2 is the position view one of diffusion barrier and fingerprint recognition mould group；Fig. 3 is diffusion barrier and fingerprint recognition mould group
Position view two.As shown in Figures 2 and 3, Fig. 2 and Fig. 3 respectively illustrate diffusion barrier 102 and fingerprint recognition mould group 301 not
The direction of same position optical signal, when finger touch panel 201, the fingerprint image on panel 201 runs through backlight module 10
To fingerprint recognition mould group 30, identified in fingerprint recognition mould group 30.Wherein, in backlight module 10, panel 201 and fingerprint recognition
When position between mould group 30 is fixed, the distance between diffusion barrier 102 and fingerprint recognition mould group 301 are greater than in Fig. 3 in Fig. 2
The distance between diffusion barrier 102 and fingerprint recognition mould group 301.From Fig. 2 and Fig. 3 as can be seen that when diffusion barrier 102 and fingerprint are known
When the distance between other mould group 301 shortens, diffusion barrier 102 can reduce the range of optical signal diffusion, reduce and overlap between signal
Influence, be more clear fingerprint image.Therefore, in fingerprint recognition, light guide plate 101,102 and of diffusion barrier in backlight module 10
Relative position between reflectance coating 103 determines the clarity of fingerprint image, and in backlight module 10, diffusion barrier 102 is arranged
In the side for deviating from panel 201, i.e. diffusion barrier 102 can improve fingerprint when carrying out fingerprint recognition close to fingerprint recognition mould group 30
The clarity of image.
When finger touch panel 201, the light for carrying out the light source of fingerprint recognition is reflected towards the surface of panel 201, comes from
The optical signal of the fingerprint image on the surface of panel 201 sequentially passes through light guide plate 101, diffusion barrier 102 and reflectance coating 103, into referring to
Line identifies in mould group 30, ultimately forms fingerprint image to be identified.
Backlight module provided by the embodiments of the present application, by the way that light-permeable structure is arranged, light-permeable structure is for making backlight mould
The light of 201 side of close panel of group 10 is through to the fingerprint recognition mould group 30 of 10 other side of backlight module.Light-permeable structure
Including the light guide plate 101, diffusion barrier 102 and reflectance coating 103 being stacked, diffusion barrier 102 is arranged in one away from panel 201
Side, i.e. diffusion barrier 102 are close to fingerprint recognition mould group 30, in this way, can improve the clear of fingerprint image when carrying out fingerprint recognition
Degree.
Further, backlight module provided by the embodiments of the present application, further include be stacked with light-permeable structure can not
Translucent construction can not have loophole on translucent construction.Specifically, light enters fingerprint recognition mould group 30 by loophole.?
When specific implementation, the area of loophole is equal to or more than the area of fingerprint identification region in fingerprint recognition mould group 30, so that face
Fingerprint image can completely on plate 201 is in backlight module 10 to the fingerprint identification region of fingerprint recognition mould group 30.
In specific implementation, can not translucent construction include stiffening plate 104, stiffening plate 104 be located at reflectance coating 103 away from face
The side of plate 201.
Specifically, stiffening plate 104 is alternatively referred to as barn door, loophole is set on stiffening plate 104, and light passes through loophole
Into fingerprint recognition mould group 30, remaining lightproof part of stiffening plate 104 is used for shading or reflection light.Optionally, stiffening plate 104
Using steel plate, stiffening plate 104 with a thickness of 0.09~0.11mm.Specifically, stiffening plate 104 with a thickness of 0.1mm.
Stiffening plate 104 can also use other materials for shading, for example, black and white glue.The present embodiment does not limit herein
It is fixed.
Fig. 4 is the structural schematic diagram of prism film in a kind of backlight module provided by the embodiments of the present application.As shown in figure 4, this
Apply for the backlight module that embodiment provides, further includes prism film 105, prism film 105 is located on light guide plate 101,104 He of prism film
Diffusion barrier 102 is located at the opposite sides of light guide plate 101.
Prism film 105 is used to increase the brightness of panel 201, specifically, prism film 105 improves the angle distribution of light, it will be from expansion
Dissipate equably converging on axial angle to the light that all angles dissipate for the injection of film 102, that is, the positive angle of panel 201
On, axial brightness is improved in the case where not increasing outgoing total light flux.
Prism film 105 with a thickness of 0.09~0.11mm.Specifically, prism film 105 with a thickness of 0.1mm.
Fig. 5 is refraction diagram of a kind of prism film to light in the prior art.As shown in figure 5, in the prior art, prism film
There are multiple prisms 1051, the wedge angle 1052 of prism 1051 towards panel 201 is 90 ° on 105.In fingerprint recognition, use
In fingerprint recognition light through in 201 entry of backlight mould group 10 of panel, the incidence angle 1053 of incident light 1054, which is greater than 90 °, can just make
The light of low-angle is by prism film 105, and therefore, the light of low-angle cannot pass through prism film 105 and enter fingerprint recognition mould group 30
In, cause fingerprint image central area that the divided imaging results of image are presented.That is, being needed when wedge angle 1052 is 90 °
Incident light 1054 basically reaches 90 °, and the light that through superrefraction (optically thinner medium enters optically denser medium), could form low-angle is (vertical
In the lower surface of prism 1051, larger refraction is not generated, so that low-angle be kept to reach fingerprint recognition mould group 30).In wedge angle
1052 be 90 ° of prism film, without in 90 ° of light emissions to the lower surface of prism 1051.
Fig. 6 be in a kind of backlight module provided by the embodiments of the present application prism film to the refraction diagram of light.Such as Fig. 6 institute
Show specifically, backlight module provided by the embodiments of the present application, there is multiple prisms 1051, prism 1051 on prism film 105
Wedge angle 1052 towards panel 201 is obtuse angle.Obtuse angle is set by the wedge angle 1052 of prism 1051 towards panel 201.In this way,
The incidence angle 1053 of incident light 1054 can also make the light of low-angle by prism film 105 less than 90 °, not generate larger refraction.?
When fingerprint recognition, can imaging region is more in fingerprint recognition mould group 30, bigger available fields range can be obtained, promotion refers to
The performance of line identification.
Further, the angle of prism 1051 towards the wedge angle 1052 of panel 201 is 100~160 °.
Optionally, the angle of prism 1051 towards the wedge angle 1052 of panel 201 is 120 °, and fingerprint imaging quality is most at this time
It is good.
As a kind of optional mode, backlight module provided by the embodiments of the present application also has polarizing layer on prism film 105
1053, polarizing layer 1053 and prism 1051 are located at the opposite two sides of prism film 105.
Specifically, polarizing layer 1053 is used to form polarised light, increase the brightness of panel 201.The material of polarizing layer 1053 can
Think polyvinyl alcohol (PVA)；Also the protective layer for protecting polarizing layer 1053, the material of protective layer can be set on polarizing layer 1053
Matter is Triafol T (TAC).Certainly, other materials with the same function, protective layer also can be selected in polarizing layer 1053
Other suitable materials with defencive function can be selected.
Backlight module provided by the embodiments of the present application can also be used in recognition of face, recognition of face principle and above-mentioned reality
The principle for applying fingerprint recognition in example is identical, and the present embodiment is not limited thereto.
Fig. 7 is a kind of structural schematic diagram of liquid crystal module provided by the embodiments of the present application.As shown in fig. 7, the application is implemented
Example also provides a kind of liquid crystal module 20, wherein liquid crystal module 20 includes panel 201 and above-mentioned backlight module 10.
Specifically, panel 201 includes first substrate 202, the second substrate 203, layer of liquid crystal molecule 204；
First substrate 202 is parallel with the second substrate 203, and layer of liquid crystal molecule 204 is located at first substrate 202 and the second substrate
Between 203, backlight module 10 is located at 203 lower section of the second substrate.
Wherein, the structure of backlight module 10 is described in detail in the above-described embodiments, will not repeat them here.
Panel 201 with a thickness of 1.1~1.3mm, optionally, panel 201 with a thickness of 1.2mm.
Further, liquid crystal module 20 provided by the embodiments of the present application, further includes first light source (not shown), and first
Light source is for illuminating panel 201.
Specifically, first light source can be LED backlight, the long service life of LED backlight.Specifically, LED backlight
LED light bar can be used.First light source can be located at the side of backlight module 10, and panel 201 is illuminated in the form of side incident,
That is side-edge type backlight.First light source can also be located on stiffening plate 104, panel 201 be illuminated in the form of vertically entering light, i.e., directly
Backlight.For the position of first light source, the present embodiment is not limited thereto.
Fig. 8 is a kind of structural schematic diagram of fingerprint identification device provided by the embodiments of the present application.As shown in figure 8, the application
Embodiment provides a kind of fingerprint identification device 30, and fingerprint identification device 30 includes fingerprint recognition mould group 301 and above-mentioned liquid crystal mould
Group 20, fingerprint recognition mould group 301 include fingerprint recognition chip 3011, optical lens 3012, and optical lens 3012 is located at fingerprint knowledge
Between other chip 3011 and liquid crystal module 20.
Wherein, the structure of liquid crystal module 20 is described in detail in the above-described embodiments, will not repeat them here.
Specifically, the optical signal of the fingerprint image on surface of the fingerprint recognition chip 3011 for identification from panel 201.
When finger touch panel 201, the light for carrying out the light source of fingerprint recognition is reflected towards the surface of panel 201, comes from
The optical signal of the fingerprint image on the surface of panel 201 sequentially passes through light guide plate 101, diffusion barrier 102 and reflectance coating 103, through light
It learns camera lens 3012 to enter on the line identification chip 3011 in fingerprint recognition mould group 30, be come from by the identification of fingerprint recognition chip 3011
The optical signal of the fingerprint image on the surface of panel 201.
Further, fingerprint identification device 30 provided by the embodiments of the present application further includes second light source 302, second light source
302 for making 201 reflection fingerprint image of panel.
Optionally, second light source 302 is infrared light supply.
Further, fingerprint identification device provided by the embodiments of the present application, the incident direction and liquid of 302 light source of second light source
The panel 201 of brilliant mould group 20 has angle.That is, 302 light source incline of second light source enters panel 201, in this way, increasing
The area for the fingerprint image that second light source 302 reflects panel 201.
The position of second light source 302 can be following two implementation:
In one possible implementation, fingerprint identification device provided by the embodiments of the present application, 302 light source of second light source
Positioned at the side of panel 201.
In alternatively possible implementation, fingerprint identification device provided by the embodiments of the present application, second light source 302
In the lower section of panel 201.In specific implementation, the first side of panel 201 and the first side of backlight module 10 are concordant, panel 201
The distance between the first opposite side and second side are greater than opposite the distance between the first side and second side of backlight module.Exist
In Fig. 8, in one direction, the length of panel 201 is greater than the length of backlight module 10, i.e. 201 part of panel and backlight module
10 overlappings, second light source 302 are located at the not lower section Chong Die with backlight module 10 of panel 201.
Specifically, the distance between diffusion barrier 102 and first substrate 202 are 1.63~1.68mm in liquid crystal module 20.It should
In distance range, when carrying out fingerprint recognition, the clarity of fingerprint image can be improved.
Fig. 9 is a kind of structural schematic diagram of mobile terminal provided by the embodiments of the present application.As shown in figure 9, in above-mentioned each reality
On the basis of applying example, the embodiment of the present application provides a kind of mobile terminal 40, and mobile terminal 40 includes above-mentioned fingerprint identification device
30。
Wherein, the structure of fingerprint identification device 30 is described in detail in the above-described embodiments, will not repeat them here.
Wherein, which can be liquid crystal module, Electronic Paper, Organic Light Emitting Diode (Organic Light-
Emitting Diode, OLED) panel, mobile phone, tablet computer, television set, display, laptop, Digital Frame, navigation
Any products or components having a display function such as instrument, wearable device or household appliance.
Figure 10 is a kind of structural schematic diagram of fingerprint recognition mould group provided by the embodiments of the present application.As shown in Figure 10, upper
On the basis of stating 20 embodiment of liquid crystal module, the embodiment of the present application provides a kind of fingerprint recognition mould group 60, is applied to have above-mentioned
Liquid crystal module 20 mobile terminal 50, wherein fingerprint recognition mould group 60 include fingerprint recognition chip 3011 and optical lens
3012, optical lens 3012 is between fingerprint recognition chip 3011 and liquid crystal module 20.
Finally, it should be noted that the above various embodiments is only to illustrate the technical solution of the application, rather than its limitations；To the greatest extent
Pipe is described in detail the application referring to foregoing 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, each embodiment technology of the application that it does not separate the essence of the corresponding technical solution
The range of scheme.
Claims (20)
1. a kind of backlight module characterized by comprising light-permeable structure, the light-permeable structure is for making the backlight mould
The light of the close panel side of group is through to the fingerprint recognition mould group of the backlight module other side, the light-permeable structure packet
Include the light guide plate, diffusion barrier and reflectance coating being stacked, the diffusion barrier between the light guide plate and the reflectance coating and
Positioned at the side for deviating from the panel.
2. backlight module according to claim 1, which is characterized in that further include being stacked with the light-permeable structure
Can not translucent construction, it is described to have loophole on translucent construction.
3. backlight module according to claim 2, which is characterized in that it is described can not translucent construction include stiffening plate, it is described
Stiffening plate is located at the side away from the panel of the reflectance coating.
4. backlight module according to claim 1, which is characterized in that further include prism film, the prism film is located at described
On light guide plate, the prism film and the diffusion barrier are located at the opposite sides of the light guide plate.
5. backlight module according to claim 4, which is characterized in that there are multiple prisms on the prism film, it is described
The wedge angle of prism towards the panel is obtuse angle.
6. backlight module according to claim 5, which is characterized in that the prism towards the panel wedge angle angle
Degree is 91~175 °.
7. backlight module according to claim 5, which is characterized in that the angle of the wedge angle is 100 °, 110 ° or 120 °.
8. backlight module according to claim 4, which is characterized in that also there is polarizing layer on the prism film, it is described inclined
Photosphere and the prism are located at the opposite two sides of the prism film.
9. a kind of liquid crystal module, which is characterized in that including panel and the described in any item backlight modules of claim 1-8；
The panel includes first substrate, the second substrate, layer of liquid crystal molecule；
The first substrate is parallel with the second substrate, and the layer of liquid crystal molecule is located at the first substrate and second base
Between plate, the backlight module is located at below the second substrate.
10. liquid crystal module according to claim 9, which is characterized in that further include first light source, the first light source is used for
Illuminate the panel.
11. a kind of fingerprint identification device, which is characterized in that including liquid crystal described in fingerprint recognition mould group and claim 9 or 10
Mould group, the fingerprint recognition mould group include fingerprint recognition chip, optical lens, and the optical lens is located at the fingerprint recognition core
Between piece and the liquid crystal module.
12. fingerprint identification device according to claim 11, which is characterized in that it further include second light source, second light
Source is for making the panel reflection fingerprint image.
13. fingerprint identification device according to claim 11, which is characterized in that diffusion barrier described in the liquid crystal module with
The distance between described first substrate is 1.63~1.68mm.
14. fingerprint identification device according to claim 12, which is characterized in that the incident direction of the second light source light source
There is angle with the panel of the liquid crystal module.
15. fingerprint identification device according to claim 12, which is characterized in that the second light source light source is located at the face
The side of plate.
16. fingerprint identification device according to claim 12, which is characterized in that the second light source light source is located at the face
The lower section of plate.
17. fingerprint identification device according to claim 16, which is characterized in that opposite the first side and second of the panel
The distance between side is greater than opposite the distance between the first side and second side of the backlight module, the first side of the panel with
First side of the backlight module is concordant.
18. fingerprint identification device according to claim 12, which is characterized in that the second light source is infrared light supply.
19. a kind of mobile terminal, which is characterized in that including the described in any item fingerprint identification devices of claim 11-18.
20. a kind of fingerprint recognition mould group, which is characterized in that applied to the shifting with liquid crystal module described in claim 9 or 10
Dynamic terminal, wherein the fingerprint recognition mould group includes fingerprint recognition chip and optical lens, and the optical lens is located at the finger
Between line identification chip and the liquid crystal module.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2018/119149 WO2020113415A1 (en) | 2018-12-04 | 2018-12-04 | Backlight module, liquid crystal module, fingerprint recognition device and module, and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109690372A true CN109690372A (en) | 2019-04-26 |
Family
ID=66191832
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880002695.3A Pending CN109690372A (en) | 2018-12-04 | 2018-12-04 | Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109690372A (en) |
| WO (1) | WO2020113415A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111062017A (en) * | 2019-11-04 | 2020-04-24 | Oppo广东移动通信有限公司 | Fingerprint module and terminal |
| CN111860065A (en) * | 2019-04-30 | 2020-10-30 | 深圳市隆利科技股份有限公司 | Fingerprint identification module |
| WO2020258766A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市隆利科技股份有限公司 | Backlight module and electronic device |
| US10936847B1 (en) | 2019-09-20 | 2021-03-02 | Shenzhen GOODIX Technology Co., Ltd. | Under-display optical sensor with compensated light paths |
| CN113569601A (en) * | 2020-04-28 | 2021-10-29 | 华为技术有限公司 | Under-screen fingerprint identification system and electronic equipment |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114792491A (en) * | 2021-01-26 | 2022-07-26 | 深圳市柔宇科技股份有限公司 | Foldable display module and foldable display equipment |
| CN113745391B (en) * | 2021-08-26 | 2022-10-14 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114442376A (en) * | 2022-02-22 | 2022-05-06 | 四川长虹电器股份有限公司 | Side-entering type ultra-narrow fourth side liquid crystal module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108683756A (en) * | 2018-04-20 | 2018-10-19 | Oppo广东移动通信有限公司 | Fingerprint recognition component, display device and electronic device |
| CN108877492A (en) * | 2017-05-02 | 2018-11-23 | 乐金显示有限公司 | It is embedded in the flat-panel monitor of optical imaging sensor |
| CN208173153U (en) * | 2018-05-11 | 2018-11-30 | 印象认知（北京）科技有限公司 | A kind of display screen and electronic equipment |
| CN209543017U (en) * | 2018-12-04 | 2019-10-25 | 深圳市汇顶科技股份有限公司 | Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5252428B2 (en) * | 2007-12-19 | 2013-07-31 | 株式会社ジャパンディスプレイウェスト | Display device and lighting device |
| TWI585655B (en) * | 2010-08-05 | 2017-06-01 | 友達光電股份有限公司 | Optical plate structure for a touch panel, and touch display panel and touch liquid crystal display panel including the same |
| CN107832752B (en) * | 2017-12-15 | 2021-04-27 | 京东方科技集团股份有限公司 | Fingerprint identification panel, full-screen fingerprint identification method and display device |
-
2018
- 2018-12-04 WO PCT/CN2018/119149 patent/WO2020113415A1/en active Application Filing
- 2018-12-04 CN CN201880002695.3A patent/CN109690372A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108877492A (en) * | 2017-05-02 | 2018-11-23 | 乐金显示有限公司 | It is embedded in the flat-panel monitor of optical imaging sensor |
| CN108683756A (en) * | 2018-04-20 | 2018-10-19 | Oppo广东移动通信有限公司 | Fingerprint recognition component, display device and electronic device |
| CN208173153U (en) * | 2018-05-11 | 2018-11-30 | 印象认知（北京）科技有限公司 | A kind of display screen and electronic equipment |
| CN209543017U (en) * | 2018-12-04 | 2019-10-25 | 深圳市汇顶科技股份有限公司 | Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111860065A (en) * | 2019-04-30 | 2020-10-30 | 深圳市隆利科技股份有限公司 | Fingerprint identification module |
| WO2020258766A1 (en) * | 2019-06-28 | 2020-12-30 | 深圳市隆利科技股份有限公司 | Backlight module and electronic device |
| US10936847B1 (en) | 2019-09-20 | 2021-03-02 | Shenzhen GOODIX Technology Co., Ltd. | Under-display optical sensor with compensated light paths |
| WO2021051735A1 (en) * | 2019-09-20 | 2021-03-25 | Shenzhen GOODIX Technology Co., Ltd. | Under-display optical sensor with compensated light paths |
| CN111062017A (en) * | 2019-11-04 | 2020-04-24 | Oppo广东移动通信有限公司 | Fingerprint module and terminal |
| CN113569601A (en) * | 2020-04-28 | 2021-10-29 | 华为技术有限公司 | Under-screen fingerprint identification system and electronic equipment |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020113415A1 (en) | 2020-06-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109690372A (en) | Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal | |
| CN100495133C (en) | Backlight unit and liquid crystal display comprising the same | |
| US9881562B2 (en) | Display apparatus | |
| US20080252818A1 (en) | Liquid crystal display and backlight module thereof | |
| US20070127260A1 (en) | Light guiding apparatus, backlight assembly and liquid crystal display device having the same | |
| CN104832827B (en) | Light source module and display device | |
| CN100454109C (en) | Liquid crystal display with improved display unevenness | |
| US20070147079A1 (en) | Backlight module with multiple light sources | |
| CN101142442A (en) | Lighting apparatus and LCD device | |
| US10627674B2 (en) | Backlight unit and liquid crystal display device including the same | |
| TW200817726A (en) | Light guide plate and back-lighted module having light guide plate | |
| US10564475B2 (en) | Backlight unit and liquid crystal display device including the same | |
| CN101680637A (en) | Lighting device and liquid crystal display | |
| CN101533166B (en) | Liquid crystal display device | |
| CN100552509C (en) | LCD and backlight module thereof | |
| CN209543017U (en) | Backlight module, liquid crystal module, fingerprint identification device and mould group, mobile terminal | |
| US9903997B2 (en) | Light transmission device, backlight module and display device | |
| US20110141401A1 (en) | Backlight unit and liquid crystal display device having the same | |
| KR20130133619A (en) | Image display device | |
| CN101311002A (en) | Writing board | |
| US20100118231A1 (en) | Liquid crystal display device | |
| CN1553259A (en) | Light negative module | |
| US20210396912A1 (en) | Optical film layer and display device | |
| KR20170080791A (en) | Electronic device including liquid crystal display device | |
| CN207895195U (en) | Sidelight type backlight module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190426 |