CN209625231U - Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment - Google Patents
Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment Download PDFInfo
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- CN209625231U CN209625231U CN201822111566.8U CN201822111566U CN209625231U CN 209625231 U CN209625231 U CN 209625231U CN 201822111566 U CN201822111566 U CN 201822111566U CN 209625231 U CN209625231 U CN 209625231U
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Abstract
The application provides a kind of liquid crystal display fingerprint mould group, shields lower fingerprint recognition system and electronic equipment.The liquid crystal display fingerprint mould group includes display module, fingerprint light source and fingerprint sensor；Display module includes prism structure, and prism structure is located at light guide plate towards the side of liquid crystal display panel；There are reversed prism structures between light guide plate and the photosurface of fingerprint sensor；Prism structure is opposite with the direction of the prism angle of reversed prism structure.The accuracy of fingerprint recognition can be improved in the application.
Description
Technical field
The invention relates to identification technology more particularly to a kind of liquid crystal display fingerprint mould group, shield lower fingerprint recognition system
System and electronic equipment.
Background technique
With the development of electronic technology, the display screen of electronic equipment gradually develops to comprehensive screen, higher and higher screen accounting,
This places the capacitance type fingerprint mould group of current mainstream nowhere, shields lower optical finger print and comes into being.
Currently, for Organic Light Emitting Diode (Organic Light-Emitting Diode, abbreviation OLED) display screen,
The application for shielding lower optical finger print identifying schemes is more and more.For liquid crystal display (Liquid Crystal Display, letter
Claim LCD) screen under optical finger print identify that the light that fingerprint sensor can be arranged in an lcd to reflect according to finger generates fingerprint
Image then carries out fingerprint recognition.
However, usually there is prism film in the backlight module of LCD to improve the display brightness of LCD, and the prism film makes
The effective viewing field of fingerprint sensor is reduced, and can also make fingerprint sensor fingerprint image generated generate distortion, thus unfavorable
In fingerprint recognition.
Utility model content
The embodiment of the present application provides a kind of liquid crystal display fingerprint mould group, shields lower fingerprint recognition system and electronic equipment, to mention
The effective viewing field of high fingerprint sensor avoids the distortion of fingerprint sensor fingerprint image generated, improves the standard of fingerprint recognition
Exactness.
The embodiment of the present application provides a kind of liquid crystal display fingerprint mould group, comprising: display module, fingerprint light source and fingerprint sensing
Device；Wherein, the display module includes liquid crystal display panel and backlight module；
The liquid crystal display panel is located above the backlight module；The fingerprint sensor is located under the backlight module
Side；The backlight module includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；
The prism structure is located at the light guide plate towards the side of the liquid crystal display panel；The light guide plate and the fingerprint sensor
There are reversed prism structures between photosurface；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；
The light that the fingerprint light source issues passes sequentially through the prism structure, the light guide plate and described inverse after reflection
Prism structure is incident to the photosurface of the fingerprint sensor.
Optionally, the backlight module includes: composite membrane；The composite membrane is located at the light guide plate towards the liquid crystal surface
The side of plate；The prism structure includes: the first prism structure, and first prism structure is located at the composite membrane described in
The side of liquid crystal display panel；
The reversed prism structure includes: the first reversed prism structure；First prism structure and the first reversed prism knot
The direction of the prism angle of structure is opposite.
Optionally, the backlight module further include: bright enhancement film；The bright enhancement film is located at the composite membrane and the light guide plate
Between；
The prism structure further include: the second prism structure, second prism structure are located at the bright enhancement film towards institute
State the side of composite membrane；The crest line of first prism structure is vertical with the crest line of second prism structure；
The reversed prism structure further include: the second reversed prism structure；Second prism structure and second reversed prism
The direction of the prism angle of structure is opposite.
Optionally, the fingerprint light source is infrared light supply；The backlight is visible light source；
The backlight module further include: diffusion barrier；The diffusion barrier is between the bright enhancement film and the light guide plate；
The diffusion barrier is less than the diffusion barrier to the mist degree of visible light to the mist degree of infrared light.
Optionally, the fingerprint light source is infrared light supply；The backlight is visible light source；The backlight module also wraps
Include: reflectance coating, the reflectance coating are located at the side that the light guide plate deviates from the liquid crystal display panel；
The reflectance coating is greater than transmitance of the reflectance coating to visible light, the reflectance coating pair to the transmitance of infrared light
The reflectivity of infrared light is less than the reflectance coating to the reflectivity of visible light.
Optionally, the reversed prism structure is located at the side of photosurface of the reflectance coating towards the fingerprint sensor.
Optionally, the backlight module further include: support plate；The support plate is located at the reflectance coating away from the liquid crystal
The side of panel；
The support plate has through-hole, with so that the fingerprint light source in the field range of the fingerprint sensor
The light of sending is passed through from the through-hole after reflection.
Optionally, the liquid crystal display fingerprint mould group further include: optical filter；The optical filter be located at the backlight module with
Between the photosurface of the fingerprint sensor.
Optionally, the reversed prism structure is located at the side of photosurface of the optical filter towards the fingerprint sensor.
Optionally, the reversed prism structure is located at the upper surface of the photosurface of the fingerprint sensor.
Optionally, the display module further includes cover board, and the cover board is located at the top of the liquid crystal display panel；The fingerprint
Light source is located at vacant locations of the cover board towards the liquid crystal display panel side.
Optionally, the fingerprint light source passes through the following table face paste at the vacant locations in smooth mode and the cover board
It closes, so that the light-emitting surface of the fingerprint light source is parallel with the lower surface of the cover board.
Optionally, the fingerprint light source passes through the following table face paste at the vacant locations in bias laid mode and the cover board
It closes, so that there are preset angles for the lower surface of the light-emitting surface of the fingerprint light source and the cover board.
Optionally, the fingerprint light source is located at the side of the light guide plate.
The embodiment of the present application provides fingerprint recognition system under a kind of screen, comprising: suitable for the liquid crystal with backlight module
Show that fingerprint recognition system includes fingerprint light source and fingerprint sensing under the screen shield lower optical finger print detection below mould group
Device；
The fingerprint light source is for providing the light of fingerprint detection, and the fingerprint sensor is for detecting pressing in the liquid
The fingerprint image of finger above brilliant display module, and the field range of the fingerprint sensor is located at the liquid crystal display die set
Display area；
Wherein, the liquid crystal display die set includes liquid crystal display panel and the backlight module that the liquid crystal display panel back side is arranged in,
The backlight module includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；Institute
It states prism structure and is located at the light guide plate towards the side of the liquid crystal display panel；The sense of the light guide plate and the fingerprint sensor
There are reversed prism structures between smooth surface；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；
The light that the fingerprint light source issues passes sequentially through the prism film, the light guide plate and the inverse edge after reflection
Mirror structure is incident to the photosurface of the fingerprint sensor.
Optionally, the backlight module further include: composite membrane；The composite membrane is located at the light guide plate towards the liquid crystal
The side of panel；The prism structure includes: the first prism structure, and first prism structure is located at the composite membrane towards institute
State the side of liquid crystal display panel；
The reversed prism structure includes: the first reversed prism structure；First prism structure and the first reversed prism knot
The direction of the prism angle of structure is opposite.
Optionally, the backlight module further include: bright enhancement film；The bright enhancement film is located at the composite membrane and the light guide plate
Between；
The prism structure further include: the second prism structure, second prism structure are located at the bright enhancement film towards institute
State the side of composite membrane；The crest line of first prism structure is vertical with the crest line of second prism structure；
The reversed prism structure further include: the second reversed prism structure；Second prism structure and second reversed prism
The direction of the prism angle of structure is opposite.
Optionally, the fingerprint light source is infrared light supply；The backlight is visible light source；
The backlight module further include: diffusion barrier；The diffusion barrier is between the bright enhancement film and the light guide plate；
The diffusion barrier is less than the diffusion barrier to the mist degree of visible light to the mist degree of infrared light.
Optionally, the fingerprint light source is infrared light supply；The backlight is visible light source；
The backlight module further include: reflectance coating, the reflectance coating are located at the light guide plate away from the liquid crystal display panel
Side；
The reflectance coating is greater than transmitance of the reflectance coating to visible light, the reflectance coating pair to the transmitance of infrared light
The reflectivity of infrared light is less than the reflectance coating to the reflectivity of visible light.
Optionally, the reversed prism structure is located at the side of photosurface of the reflectance coating towards the fingerprint sensor.
Optionally, the backlight module further include: support plate；The support plate is located at the reflectance coating away from the liquid crystal
The side of panel；
The support plate has through-hole, with so that the fingerprint light source in the field range of the fingerprint sensor
The light of sending is passed through from the through-hole after reflection.
Optionally, fingerprint recognition system under the screen further include: optical filter；The optical filter be located at the backlight module with
Between the photosurface of the fingerprint sensor.
Optionally, the reversed prism structure is located at the side of photosurface of the optical filter towards the fingerprint sensor.
Optionally, the reversed prism structure is located at the upper surface of the photosurface of the fingerprint sensor.
Optionally, the liquid crystal display die set further includes cover board, and the cover board is located at the top of the liquid crystal display panel；
Wherein, the fingerprint light source is bonded by smooth mode with the lower surface at the vacant locations on the cover board,
So that the light-emitting surface of the fingerprint light source is parallel with the lower surface of the cover board；Alternatively,
The fingerprint light source is bonded by bias laid mode with the lower surface at the vacant locations on the cover board, so that institute
There are preset angles for the light-emitting surface for stating fingerprint light source and the lower surface of the cover board.
Optionally, the fingerprint light source is located at the side of the light guide plate.
The embodiment of the present application also provides a kind of electronic equipment, comprising: above-mentioned liquid crystal display fingerprint mould group.
The embodiment of the present application provides a kind of liquid crystal display fingerprint mould group, shields lower fingerprint recognition system and electronic equipment, wherein
Liquid crystal display fingerprint mould group can include: display module, fingerprint light source and fingerprint sensor；Wherein, which includes liquid crystal
Panel and backlight module；The liquid crystal display panel is located above the backlight module；The fingerprint sensor is located at the lower section of the backlight module；
The backlight module includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；The prism knot
Structure is located at side of the light guide plate towards the liquid crystal display panel；There are inverse edges between the light guide plate and the photosurface of the fingerprint sensor
Mirror structure；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；The light that the fingerprint light source issues is through reflecting
The photosurface that the prism structure, the light guide plate and the reversed prism structure are incident to the fingerprint sensor is passed sequentially through afterwards.The liquid crystal
Show that fingerprint mould group can be by being arranged reversed prism structure, by the reversed prism knot between light guide plate and the photosurface of fingerprint sensor
Structure carries out the fingerprint light progress light combination process after light-splitting processing to prism structure, ensure that the effective viewing field of fingerprint sensor,
The fission of fingerprint image is also avoided, to ensure that the accuracy of the fingerprint recognition of LCD.
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 lamination schematic diagram one of liquid crystal display fingerprint mould group provided by the embodiments of the present application；
Fig. 2 is that the image of liquid crystal display fingerprint mould group provided by the embodiments of the present application restores schematic diagram；
Fig. 3 is a kind of lamination schematic diagram two of liquid crystal display fingerprint mould group provided by the embodiments of the present application；
Fig. 4 is a kind of lamination schematic diagram three of liquid crystal display fingerprint mould group provided by the embodiments of the present application；
Fig. 5 is a kind of lamination schematic diagram four of liquid crystal display fingerprint mould group provided by the embodiments of the present application；
Fig. 6 is a kind of lamination schematic diagram five of liquid crystal display fingerprint mould group provided by the embodiments of the present application；
Fig. 7 is the location diagram of a kind of backlight and fingerprint light source and light guide plate that the embodiment of the present application passes through；
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Fig. 8 passes through for the embodiment of the present application
Schematic layout pattern one；
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Fig. 9 passes through for the embodiment of the present application
Schematic layout pattern two；
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Figure 10 passes through for the embodiment of the present application
Schematic layout pattern three；
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Figure 11 passes through for the embodiment of the present application
Schematic layout pattern four；
Figure 12 is the structural schematic diagram of a kind of electronic equipment provided by the embodiments of the present application.
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.
Unless otherwise defined, all technical and scientific terms used herein and the technical field for belonging to the application
The normally understood meaning of technical staff is identical.The term used in the description of the present application is intended merely to description tool herein
The purpose of the embodiment of body, it is not intended that in limitation the application.Term as used herein "and/or" includes one or more phases
Any and all combinations of the listed item of pass.With reference to the accompanying drawing, some embodiments of the application are made specifically
It is bright.In the absence of conflict, the feature in following embodiment and embodiment can be combined with each other.
The following each embodiments of the application provide liquid crystal display fingerprint mould group, fingerprint identification method, electronic equipment and storage and are situated between
Matter can be applied to optical finger print under any screen with LCD such as smart phone, laptop, wearable device, household appliance
In the electronic equipment of identification function.Optical finger print preset regional area can be realized in an lcd under the screen of LCD.
It is illustrated as follows in conjunction with multiple examples to provided by the embodiments of the present application.Fig. 1 is provided by the embodiments of the present application
A kind of lamination schematic diagram one of liquid crystal display fingerprint mould group.As shown in Figure 1, the liquid crystal display fingerprint mould group can include: display mould
Group 1, fingerprint light source 2 and fingerprint sensor 3；Wherein, display module 1 includes: liquid crystal display panel 12 and backlight module 13.
Liquid crystal display panel 12 is located at the top of backlight module 13.Display module 1 may also include that cover board 11, and liquid crystal display panel 12 is just
It can be between cover board 11 and backlight module 13.Backlight module 13 includes: prism structure 5, light guide plate 131 and backlight 132.It leads
The side of tabula rasa 131 is provided with backlight 132.
Prism structure 5 is located at light guide plate 131 towards the side of liquid crystal display panel 12；The sense of light guide plate 131 and fingerprint sensor 3
There are reversed prism structures 6 between smooth surface；Prism structure 5 is opposite with the direction of the prism angle of reversed prism structure 6；Fingerprint light source 2 is sent out
Light out passes sequentially through the sense that prism structure 5, light guide plate 131 and reversed prism structure 6 are incident to fingerprint sensor 3 after reflection
Smooth surface.
In this example it is shown that mould group 1 can be described as the display module of LCD, cover board 11 can be glass cover-plate.Backlight mould
Backlight 132 in group 13 can provide light for liquid crystal display panel 12, and liquid crystal display panel 12 can be in the light irradiation that backlight 132 issues
Under, realize display function.Backlight 132 is located at the side of light guide plate 131, to be incident to liquid by light guide plate 131 for light
Crystal panel 12.Backlight 132 can be the light emitting diode (Light Emitting Diode, abbreviation LED) of white light.
Fingerprint light source 2 is for providing the light of fingerprint detection, and the light that fingerprint light source 2 issues is by pressing in cover board 11
On finger reflection after, cover board 11, liquid crystal display panel 12, prism structure 5, light guide plate 131 and reversed prism structure can be passed sequentially through
6, it is incident to the photosurface for being set to the fingerprint sensor 3 of 1 lower section of backlight module, to generate in the photosurface of fingerprint sensor 3
Fingerprint image data for fingerprint recognition.Wherein, fingerprint sensor 3 is properly termed as optical sensor, imaging sensor, optics
Fingerprint sensor, optical sensor or fingerprint detection inductor etc..
Prism structure 5 and reversed prism structure 6 can be located separately the side of light guide plate 131, and the prism angle of prism structure 5 can court
To light guide plate 131, and the prism angle of reversed prism structure 6 can also be towards light guide plate 131, in this way, prism structure 5 and reversed prism structure
The direction of 6 prism angle is opposite.
Prism structure 5 can emit beam in backlight 132 and successively carry out light combination after light guide plate 131 and each film layer 5
Processing, and the light after light combination process is incident to liquid crystal display panel 12, to improve the display brightness of display module.
The light of fingerprint light source 2 forms fingerprint light after finger reflects, which can pass sequentially through lid
Plate 11, liquid crystal display panel 12 are incident to prism structure 5.After the prism structure 5 can carry out light-splitting processing to the incident fingerprint light,
Reversed prism structure 6 is incident to by light guide plate 131.
Reversed prism structure 6 can be located at any position in the photosurface of light guide plate 131 and fingerprint sensor 3.To avoid shadow
The appearance for ringing liquid crystal display fingerprint mould group shows that reversed prism structure 6 can be located at the photosurface of light guide plate 131 and fingerprint sensor 3
In, the lower surface of reflecting surface.Reversed prism structure 6 can carry out light combination process to incident fingerprint light, and will be after light combination process
Fingerprint light is emitted to the photosurface of fingerprint sensor 3, so that the photosurface of fingerprint sensor 3 can be based on incident light
Generate the fingerprint image to carry out fingerprint recognition.
It is illustrated as follows in conjunction with example.Fig. 2 is that the image of liquid crystal display fingerprint mould group provided by the embodiments of the present application is extensive
Multiple schematic diagram.The fingerprint of finger is indicated in Fig. 2 with A.The light of fingerprint light source 2 forms fingerprint light after fingerprint A reflection
Line, which can pass sequentially through cover board 11, liquid crystal display panel 12 is incident to prism structure 5.The prism structure 5 can be to incidence
After the fingerprint light carries out light-splitting processing, reversed prism structure 6 is incident to by light guide plate 131.At the light splitting of prism structure 5
Reason, so that fingerprint light is separated, fissions.Reversed prism structure 6 can carry out light combination process to incident fingerprint light, and will
Fingerprint light after light combination process, is emitted to the photosurface of fingerprint sensor 3, so that the photosurface of fingerprint sensor 3 can base
The image of fingerprint A is generated in incident light.Reversed prism structure 6 is to the light combination process of fingerprint light, so that by prism structure 5
Fission image restored, form the image of complete fingerprint A.
Optionally, in above-mentioned liquid crystal display fingerprint mould group, the size of the prism angle of prism structure 5 and reversed prism structure 6 can
It is identical, alternatively, the difference of prism angle is within a preset range.For example, the prism angle of prism structure 5 and reversed prism structure 6 can be with
It is 90 °, that is, is right-angled edge pitch-angle.
Optionally, the crest line parallel alignment of prism structure 5 and reversed prism structure 6.
It is aligned under prism structure 5 and the crest line screen of reversed prism structure 6, may make that reversed prism structure 6 is most by light combination process
Possibly restore the light separated by prism structure 5, ensure that the effective viewing field of fingerprint sensor as much as possible, avoid fingerprint
The fission of image realizes the recovery of fingerprint image.
Liquid crystal display fingerprint mould group provided by the embodiments of the present application, it may include: display module, fingerprint light source and fingerprint sensing
Device；Wherein, which includes liquid crystal display panel and backlight module；The liquid crystal display panel is located above the backlight module；The fingerprint
Sensor is located at the lower section of the backlight module；The backlight module includes: prism structure, light guide plate and backlight；The light guide plate
Side is provided with the backlight；The prism structure is located at side of the light guide plate towards the liquid crystal display panel；The light guide plate refers to this
There are reversed prism structures between the photosurface of line sensor；The prism structure and the prism angle of the reversed prism structure towards phase
Instead；It is incident that the light that the fingerprint light source issues passes sequentially through the prism structure, the light guide plate and the reversed prism structure after reflection
To the photosurface of the fingerprint sensor.The liquid crystal display fingerprint mould group can by light guide plate and fingerprint sensor photosurface it
Between be arranged reversed prism structure, by the reversed prism structure to prism structure carry out light-splitting processing after fingerprint light carry out light combination
Reason, ensure that the effective viewing field of fingerprint sensor, it is thus also avoided that the fission of fingerprint image, to ensure that the fingerprint recognition of LCD
Accuracy.
In liquid crystal display fingerprint mould group provided by the embodiments of the present application, the number of prism structure 5 can be multiple, correspondence
, the number of reversed prism structure 6 may be multiple.The number of prism structure 5 and reversed prism structure 6 can be identical.Fig. 3 is this Shen
Please embodiment provide a kind of liquid crystal display fingerprint mould group lamination schematic diagram two.On the basis of above-mentioned Fig. 1, backlight module 13
Further include: composite membrane 133.Composite membrane 133 is located at the light guide plate 131 towards the side of liquid crystal display panel 12.
Prism structure 5 includes: the first prism structure, which is located at composite membrane 133 towards liquid crystal display panel 12
Side；Reversed prism structure 6 includes: the first reversed prism structure；The prism of first prism structure and the first reversed prism structure
The direction at angle is opposite.It should be pointed out that prism structure 5 shown in Fig. 3 is the first prism structure.
First prism structure can be the prism structure independently of composite membrane 133, that is, be located at composite membrane 133 towards liquid crystal
In the one side of panel 12；First prism structure also can integrate is used as composite membrane 133 towards liquid crystal display panel on composite membrane 133
12 superficial film.
The first reversed prism structure can be described as the corresponding reversed prism structure of first prism structure.
Optionally, the size of the prism angle of the first prism structure and the first reversed prism structure can be identical, alternatively, prism angle
Difference is within a preset range.For example, the prism angle of 5 reversed prism structures 6 of prism structure all can be 90 °, that is, it is right-angled edge
Pitch-angle.
Optionally, the crest line parallel alignment of the first prism structure and the first reversed prism structure.
First reversed prism structure included by reversed prism structure 6 can be restored as much as possible by light combination process by the first rib
The separated light of mirror structure, ensure that the effective viewing field of fingerprint sensor as much as possible, avoid the fission of fingerprint image.
With continued reference to Fig. 3, optionally, backlight module 13 further include: bright enhancement film 134；Bright enhancement film 134 is located at composite membrane 133
Between light guide plate 131.
Prism structure further include: the second prism structure, second prism structure are located at bright enhancement film 134 towards composite membrane 133
Side；The crest line of first prism structure is vertical with the crest line of second prism structure.It should be pointed out that shown in Fig. 3
Prism structure 5 is by taking the first prism structure as an example, for the second prism structure, due to the crest line and first rib of the second prism structure
The crest line of mirror structure is vertical, is temporarily not shown with the visual angle of Fig. 3.
Second prism structure can be the prism structure independently of bright enhancement film 134, that is, be located at bright enhancement film 134 towards liquid crystal
The one side of panel 12；Second prism structure also can integrate is used as bright enhancement film 134 towards liquid crystal display panel 12 on bright enhancement film 134
Superficial film.
The reversed prism structure further include: the second reversed prism structure；Second prism structure and the second reversed prism structure
The direction of prism angle is opposite.The crest line of the first reversed prism structure is vertical with the crest line of the second reversed prism structure.
The second reversed prism structure can be described as the corresponding reversed prism structure of second prism structure.
Optionally, the size of the prism angle of the second prism structure and the second reversed prism structure can be identical, alternatively, prism angle
Difference is within a preset range.For example, the prism angle of 5 reversed prism structures 6 of prism structure all can be 90 °, that is, it is right-angled edge
Pitch-angle.
Optionally, the crest line parallel alignment of the second prism structure and the second reversed prism structure.
Second reversed prism structure included by reversed prism structure 6 can be restored as much as possible by light combination process by the second rib
The separated light of mirror structure, ensure that the effective viewing field of fingerprint sensor as much as possible, avoid the fission of fingerprint image.
The fingerprint light source 2 as shown above is infrared light supply, can avoid display as fingerprint light source 2 using the infrared light supply
The visible light of screen interferes fingerprint detection, guarantees the accuracy of fingerprint detection.Also, infrared light supply is invisible, will not be to display
The display of screen impacts, i.e., in the case where guaranteeing fingerprint detection accuracy, it is also ensured that the display effect of display screen.
The infrared light supply for example can be infrared LED light source, infrared vertical cavity surface emitting laser (Vertical
Cavity Surface Emitting Laser, abbreviation VCSEL), infrared laser diode (Laser Diode) etc..
Backlight 132 is visible light source, such as can be white LED light source.
With continued reference to above-mentioned Fig. 3, optionally, backlight module further include: diffusion barrier 135；Diffusion barrier 135 is located at bright enhancement film
Between 134 and light guide plate 131.
Diffusion barrier 135 is less than diffusion barrier 135 to the mist degree of visible light to the mist degree of infrared light.That is, diffusion barrier 135 is to infrared
Light has good translucent effect, in order to the transmission of fingerprint light, ensure that the brightness of fingerprint image, guarantees the standard of fingerprint recognition
Exactness.Diffusion barrier 135 is larger to the mist degree of visible light, it is ensured that the display of liquid crystal display panel.
With continued reference to above-mentioned Fig. 3, optionally, backlight module 13 further include: reflectance coating 136.Reflectance coating 136 is located at light guide plate
131 deviate from the side of liquid crystal display panel 12.
Reflectance coating 136 is greater than reflectance coating 136 to the transmitance of visible light to the transmitance of infrared light, and reflectance coating 136 is to red
The reflectivity of outer light is less than reflectance coating 136 to the reflectivity of visible light.
In the embodiment, reflectance coating 136 is higher to the transmitance of infrared light, that is, has good translucent effect, in order to
The transmission of fingerprint light ensure that the brightness of fingerprint image, lower to the reflectivity of infrared light, anti-to avoid fingerprint light
It penetrates, ensure that the brightness of fingerprint image.Reflectance coating 136 is smaller to the transmitance of visible light, and reflectivity is higher, to guarantee liquid crystal surface
The display of plate guarantees display effect.
Optionally, the reversed prism structure 6 be located at reflectance coating 136 towards fingerprint sensor 3 photosurface side.Reversed prism
Structure 6 can for independently of reflectance coating 136 prism structure, positioned at reflectance coating 136 towards fingerprint sensor 3 photosurface one
Face；Reversed prism structure 6, which can also be integrated on reflectance coating 136 by the integrated technique of chip, is used as reflectance coating 136 towards fingerprint
The superficial film of the photosurface of sensor 3.
Fig. 3 be reversed prism structure 6 be located at reflectance coating 136 towards fingerprint sensor 3 photosurface side example.
In the embodiment, by reversed prism structure setting between reflectance coating 136 and the photosurface of fingerprint sensor 3, both may be used
The optical characteristics for guaranteeing backlight module, guarantees the display effect of liquid crystal display panel, it is also ensured that the effective viewing field of fingerprint sensor,
The fission of fingerprint image is also avoided, to ensure that the accuracy of the fingerprint recognition of LCD.
With continued reference to Fig. 3, optionally, backlight module 13 further include: support plate 137；Support plate 137 is located at reflectance coating 136
Away from the side of liquid crystal display panel 12.Support plate 137 can be steel plate, to backlight module 13 and cover board 11, liquid crystal display panel
12 are supported.
Support plate 137 has through-hole 1371 in the field range of fingerprint sensor 3, and use is so that fingerprint light source 2 issues
Light passed through after reflection from through-hole 1371.
In this embodiment, through-hole is opened up in support plate 137, so that fingerprint light-transmissive after reflection, then enters
It is incident upon the photosurface of fingerprint sensor 3, generates the fingerprint image to carry out fingerprint recognition；Support plate 137 is avoided to examine fingerprint
The influence of survey ensure that effectively fingerprint detection.
With continued reference to Fig. 3, optionally, liquid crystal display fingerprint mould group further include: optical filter (filter) 7；Optical filter 7 can position
Between backlight module 13 and the photosurface of fingerprint sensor 3.
In the embodiment, the optical filter 7 being arranged between backlight module 13 and the photosurface of fingerprint sensor 3 can be to visible
Light is filtered out, and to avoid the interference to fingerprint detection of visible light and ambient visible light of backlight module 13, guarantees fingerprint inspection
Survey accuracy.
In liquid crystal display fingerprint mould group provided by the embodiments of the present application, reversed prism structure 6 can light guide plate 131 and fingerprint sensing
Any position in the photosurface of device 3.Above-mentioned Fig. 1 and Fig. 3 is only a kind of possible example.Fig. 4 provides for the embodiment of the present application
A kind of liquid crystal display fingerprint mould group lamination schematic diagram three.It should be pointed out that the Fig. 4's and Fig. 1 is distinguished as reversed prism knot
The position of structure 6 is different, is illustrated as follows only for difference place, and same or similar place is referring specifically to above-mentioned, herein not
It repeats again.For liquid crystal display fingerprint mould group shown in Fig. 4, there can also be each lamination of backlight module 13 shown in Fig. 3,
Its specific structure position, effect description etc. can be found in above-mentioned, and details are not described herein.
As shown in figure 4, liquid crystal display fingerprint mould group further include: optical filter 7；Optical filter 7 is located at backlight module 13 and fingerprint
Between the photosurface of sensor 3.
Reversed prism structure 6 can be located at optical filter 7 towards fingerprint sensor 3 photosurface side.
Reversed prism structure 6 can be the prism structure independently of optical filter 7, positioned at optical filter 7 towards fingerprint sensor 3
The one side of photosurface；Reversed prism structure 6 can also be integrated on optical filter 7 as 7 court of optical filter by the integrated technique of chip
To the superficial film of the photosurface of fingerprint sensor 3.
In the embodiment, reversed prism structure 6 is set in the side of optical filter 7 towards the photosurface of fingerprint sensor 3, can be use up
It is likely to reduced the variation of backlight module, guarantees the optical characteristics of backlight module, guarantees the display effect of liquid crystal display panel, it is also ensured that
The effective viewing field of fingerprint sensor, it is thus also avoided that the fission of fingerprint image, to ensure that the accurate of the fingerprint recognition of LCD
Degree.
Fig. 5 is a kind of lamination schematic diagram four of liquid crystal display fingerprint mould group provided by the embodiments of the present application.It may be noted that
It is that the Fig. 5 is different from the position for being distinguished as reversed prism structure 6 of Fig. 1, is illustrated as follows only for difference place, it is identical
Or similarity, referring specifically to above-mentioned, details are not described herein.For liquid crystal display fingerprint mould group shown in fig. 5, can also have
Each lamination of backlight module 13 shown in Fig. 3, specific structure position, effect description etc. can be found in it is above-mentioned, it is no longer superfluous herein
It states.
As shown in figure 5, reversed prism structure 6 is located at the upper surface of the photosurface of fingerprint sensor 3.
Reversed prism structure 6 can be the prism structure independently of fingerprint sensor 3, positioned at the photosurface of fingerprint sensor 3；
Reversed prism structure 6 can also be integrated on the photosurface of fingerprint sensor 3 as fingerprint sensor 3 by the integrated technique of chip
Photosurface superficial film.
In the embodiment, reversed prism structure 6 is set in the upper surface of the photosurface of fingerprint sensor 3, can be reduced as far as possible
The variation of backlight module guarantees the optical characteristics of backlight module, guarantee the display effect of liquid crystal display panel, it is also ensured that fingerprint biography
The effective viewing field of sensor, it is thus also avoided that the fission of fingerprint image, to ensure that the accuracy of the fingerprint recognition of LCD.
In liquid crystal display fingerprint mould group provided by the embodiments of the present application, fingerprint light source 2 can be just arranged using either type, only
The light for wanting fingerprint light source 2 to issue can be incident to finger, and after being reflected by finger, can be incident to fingerprint by light guide plate 131
The photosurface of sensor 3.
The setting of fingerprint light source 2 is illustrated by example as follows.
In a kind of mode, which can be located at 11 lower section of cover board of the chin area of electronic equipment.That is the fingerprint
Light source 2 can be located at vacant locations of the cover board 11 towards 12 side of liquid crystal display panel.
Fingerprint light source 2 can be by optical cement in a manner of smooth or bias laid mode is fitted in cover board 11 towards liquid crystal display panel 12 1
The surface of the vacant locations of side, i.e. lower surface.
The refractive index of the optical cement can be identical as cover board 11, alternatively, the refractive index of optical cement and the refractive index of cover board 11
Difference within a preset range, can reduce the light accounting that the light of the sending of fingerprint light source 2 is reflected in the lower surface of cover board 11,
The utilization rate of fingerprint light source 2 is improved, in this way, the light that may make fingerprint light source 2 to issue exposes to finger as much as possible, is realized
Fingerprint recognition ensure that the accuracy of fingerprint recognition.
Above-mentioned Fig. 1, Fig. 3-Fig. 5 shows the smooth mode of fingerprint light source 2, referring to Fig.1, any in Fig. 3-Fig. 5, fingerprint
Light source 2 can be bonded in a manner of smooth with the lower surface at the vacant locations on cover board 11 by optical cement 4, the fingerprint light source 2
Light-emitting surface can be parallel with the lower surface of cover board 11.Fingerprint light source 2 is bonded using the smooth mode, assembly is more convenient, may make
The structure tolerance of liquid crystal display fingerprint mould group more preferably controls.
Fig. 6 is a kind of lamination schematic diagram five of liquid crystal display fingerprint mould group provided by the embodiments of the present application.The Fig. 6 is shown
The bias laid mode of fingerprint light source 2.Referring to Fig. 6, fingerprint light source 2 can be by optical cement 4, the vacancy in a manner of bias laid and on cover board 11
Lower surface fitting at position, so that the light-emitting surface of fingerprint light source 2 is with cover board 11, there are preset angles.Using the bias laid mode
It is bonded fingerprint light source 2 and cover board 11, the light that may make fingerprint light source 2 to issue is emitted to cover board 11, is avoided with preset angle
Light improves light utilization to be emitted away from the direction of fingerprint sensor 3.
It should be pointed out that the position of reversed prism structure 6 is only a kind of example in liquid crystal display fingerprint mould group in Fig. 6, it is inverse
The position of prism structure 6 can also be any position above-mentioned Fig. 3-Fig. 5, and referring specifically to above-mentioned, details are not described herein.
In a further mode of operation, fingerprint light source 2 may be additionally located at the side of light guide plate 131.It is led since backlight 132 also is located at
The side of trimmed book body 1311, thus, in this example, fingerprint light source 2 can be emitted beam by light guide plate 131 to finger, to
Carry out fingerprint recognition.
Fig. 7 is the location diagram of a kind of backlight and fingerprint light source and light guide plate that the embodiment of the present application passes through.Such as Fig. 7
It is shown, in the embodiment, fingerprint light source 2 can be also disposed to the side of light guide plate 131, fingerprint light source 2 can be equal with backlight 132
The even side for being distributed in the light guide body 1311, so that fingerprint light source 2 can be by the light conductivity of light guide plate 131 by light incidence
To finger.For example, a fingerprint light source 2 is respectively set in the symmetric position in the side of the light guide plate 131, it is ensured that finger exists
Different angle is by the fingerprint detection effect depressed in LCD screen.
No matter fingerprint light source 2 is the side for being located at 11 lower section of cover board or light guide body 1311, is to guarantee finger in LCD
On screen different angle by pressure fingerprint detection effect, the embodiment of the present application also provides the layout example of a variety of fingerprint light sources 2,
So that fingerprint light source 2 can be symmetrical.The fingerprint light source 2 can be multiple independent light sources, can also be multiple light sources group
At band light source etc..
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Fig. 8 passes through for the embodiment of the present application
Schematic layout pattern one.If two independent fingerprint light sources 2 are arranged, as shown in figure 8, two fingerprint light sources 2 can be located separately cover board
11 towards two symmetric positions in the vacant locations of 12 side of liquid crystal display panel, centered on the corresponding position of fingerprint sensor 3.
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Fig. 9 passes through for the embodiment of the present application
Schematic layout pattern two.If three independent fingerprint light sources 2 are arranged, as shown in Figure 9, wherein a fingerprint light source 2 can be located at cover board
11 towards in the vacant locations of 12 side of liquid crystal display panel, the corresponding position of fingerprint sensor 3；Other two fingerprint light source 2 can divide
Not Wei Yu cover board 11 towards in the vacant locations of 12 side of liquid crystal display panel, centered on the corresponding position of fingerprint sensor 3 two
A symmetric position.
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Figure 10 passes through for the embodiment of the present application
Schematic layout pattern three.If four independent fingerprint light sources 2 are arranged, as shown in Figure 10, four fingerprint light sources 2 can be located separately lid
Plate 11 is towards four symmetrical positions in the vacant locations of 12 side of liquid crystal display panel, centered on the corresponding position of fingerprint sensor 3
It sets.
Fingerprint mould group in a kind of electronic equipment with liquid crystal display fingerprint mould group that Figure 11 passes through for the embodiment of the present application
Schematic layout pattern four.If the band-like fingerprint light source 2 of multiple light sources composition, as shown in figure 11, band-like fingerprint light source 2 is arranged
Cover board 11 can be located at towards in the vacant locations of 12 side of liquid crystal display panel, the center of the band-like fingerprint light source 2 can be fingerprint
The corresponding position of sensor 3.
It should be noted that in the present embodiment also fingerprint detection signal can be improved by increasing the number of fingerprint light source 2
Amount, improves the accuracy of fingerprint detection.
A kind of electronic equipment with above-mentioned liquid crystal display fingerprint mould group can also be provided in the embodiment of the present application.Figure 12 is this Shen
Please embodiment provide a kind of electronic equipment structural schematic diagram.As shown in figure 12, electronic equipment can include: 1201 He of shell
Liquid crystal display fingerprint mould group 1202.Liquid crystal display fingerprint mould group 1202 is located in shell 1201.
Liquid crystal display fingerprint mould group 1202 can be liquid crystal display fingerprint mould group shown in any in above-mentioned Fig. 1-Figure 11.
The electronic equipment may include any of the above-described liquid crystal display fingerprint mould group, since liquid crystal display fingerprint mould group is protected
The effective viewing field of fingerprint sensor is demonstrate,proved, it is thus also avoided that the fission of fingerprint image may make electronic equipment to realize light under the screen of LCD
Fingerprint is learned, ensure that the accuracy of the fingerprint recognition of LCD.
The embodiment of the present application also provides fingerprint recognition system under a kind of screen, is applicable to the liquid crystal display with backlight module
Shield lower optical finger print detection below mould group.Fingerprint recognition system includes fingerprint light source and fingerprint sensor under the screen；
The fingerprint light source is for providing the light of fingerprint detection, and the fingerprint sensor is for detecting pressing in the liquid crystal display
The fingerprint image of finger above mould group, and the field range of the fingerprint sensor is located at the viewing area of the liquid crystal display die set
Domain；
Wherein, which includes liquid crystal display panel and the backlight module that the liquid crystal display panel back side is arranged in, the back
Optical mode group includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；The prism structure position
In the light guide plate towards the side of the liquid crystal display panel；There are reversed prism knots between the light guide plate and the photosurface of the fingerprint sensor
Structure；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；
The light that the fingerprint light source issues passes sequentially through the prism film, the light guide plate and the reversed prism structure after reflection and enters
It is incident upon the photosurface of the fingerprint sensor.
In a kind of achievable mode, the backlight module further include: composite membrane；The composite membrane is located at light guide plate direction should
The side of liquid crystal display panel；The prism structure includes: the first prism structure, which is located at the composite membrane towards the liquid
The side of crystal panel；
The reversed prism structure includes: the first reversed prism structure；The rib of first prism structure and the first reversed prism structure
The direction of pitch-angle is opposite.
In the achievable mode of another kind, the backlight module further include: bright enhancement film；The bright enhancement film is located at the composite membrane and is somebody's turn to do
Between light guide plate；
The prism structure further include: the second prism structure, second prism structure are located at the bright enhancement film towards the composite membrane
Side；The crest line of first prism structure is vertical with the crest line of second prism structure；
The reversed prism structure further include: the second reversed prism structure；Second prism structure and the second reversed prism structure
The direction of prism angle is opposite.
Can be in realization mode at another, which is infrared light supply；The backlight is visible light source.
The backlight module further include: diffusion barrier；The diffusion barrier is located between the bright enhancement film and the light guide plate；
The diffusion barrier is less than the diffusion barrier to the mist degree of visible light to the mist degree of infrared light.
Can be in realization mode at another, which is infrared light supply；The backlight is visible light source；
The backlight module further include: reflectance coating, the reflectance coating are located at the side that the light guide plate deviates from the liquid crystal display panel；
The reflectance coating is greater than the reflectance coating to the transmitance of visible light to the transmitance of infrared light, and the reflectance coating is to infrared light
Reflectivity be less than the reflectance coating to the reflectivity of visible light.
Can be in realization mode at another, which is located at photosurface of the reflectance coating towards the fingerprint sensor
Side.
Another can be in realization mode, the backlight module further include: support plate；The support plate is located at the reflectance coating and deviates from
The side of the liquid crystal display panel；
The support plate has through-hole in the field range of the fingerprint sensor, with so that the fingerprint light source issued
Light is passed through from the through-hole after reflection.
Another can be in realization mode, fingerprint recognition system under the screen further include: optical filter；The optical filter is located at the back
Between optical mode group and the photosurface of the fingerprint sensor.
Can be in realization mode at another, which is located at photosurface of the optical filter towards the fingerprint sensor
Side.
Can be in realization mode at another, which is located at the upper surface of the photosurface of the fingerprint sensor.
Can be in realization mode at another, which further includes cover board, which is located at the liquid crystal display panel
Top；
Wherein, which is bonded by smooth mode with the lower surface at the vacant locations on the cover board, so that should
The light-emitting surface of fingerprint light source and the lower surface of the cover board are parallel；Alternatively,
The fingerprint light source is bonded by bias laid mode with the lower surface at the vacant locations on the cover board, so that the fingerprint light
There are preset angles for the lower surface of the light-emitting surface in source and the cover board.
Fingerprint recognition system under screen provided by the embodiments of the present application can pass through the photosurface in light guide plate and fingerprint sensor
Between be arranged reversed prism structure, by the reversed prism structure to prism structure carry out light-splitting processing after fingerprint light carry out light combination
Reason, ensure that the effective viewing field of fingerprint sensor, it is thus also avoided that the fission of fingerprint image, to ensure that the fingerprint recognition of LCD
Accuracy.
Those of ordinary skill in the art will appreciate that: realize that all or part of the steps of above method embodiment can pass through
The relevant hardware of program instruction is completed, and program above-mentioned can be stored in a computer readable storage medium, the program
When being executed, step including the steps of the foregoing method embodiments is executed；And storage medium above-mentioned includes: ROM, RAM, magnetic disk or light
The various media that can store program code such as disk.
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 (27)
1. a kind of liquid crystal display fingerprint mould group characterized by comprising display module, fingerprint light source and fingerprint sensor；Its
In, the display module includes liquid crystal display panel and backlight module；
The liquid crystal display panel is located above the backlight module；The fingerprint sensor is located at the lower section of the backlight module；Institute
Stating backlight module includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；It is described
Prism structure is located at the light guide plate towards the side of the liquid crystal display panel；The light guide plate is photosensitive with the fingerprint sensor
There are reversed prism structures between face；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；
The light that the fingerprint light source issues passes sequentially through the prism structure, the light guide plate and the reversed prism after reflection
Structure is incident to the photosurface of the fingerprint sensor.
2. liquid crystal display fingerprint mould group according to claim 1, which is characterized in that the backlight module includes: composite membrane；
The composite membrane is located at the light guide plate towards the side of the liquid crystal display panel；The prism structure includes: the first prism structure,
First prism structure is located at the composite membrane towards the side of the liquid crystal display panel；
The reversed prism structure includes: the first reversed prism structure；First prism structure and the first reversed prism structure
The direction of prism angle is opposite.
3. liquid crystal display fingerprint mould group according to claim 2, which is characterized in that the backlight module further include: add lustre to
Film；The bright enhancement film is between the composite membrane and the light guide plate；
The prism structure further include: the second prism structure, second prism structure are located at the bright enhancement film towards described multiple
Close the side of film；The crest line of first prism structure is vertical with the crest line of second prism structure；
The reversed prism structure further include: the second reversed prism structure；Second prism structure and the second reversed prism structure
Prism angle direction it is opposite.
4. liquid crystal display fingerprint mould group according to claim 3, which is characterized in that the fingerprint light source is infrared light supply；
The backlight is visible light source；
The backlight module further include: diffusion barrier；The diffusion barrier is between the bright enhancement film and the light guide plate；
The diffusion barrier is less than the diffusion barrier to the mist degree of visible light to the mist degree of infrared light.
5. liquid crystal display fingerprint mould group according to claim 1, which is characterized in that the fingerprint light source is infrared light supply；
The backlight is visible light source；The backlight module further include: reflectance coating, the reflectance coating are located at the light guide plate away from institute
State the side of liquid crystal display panel；
The reflectance coating is greater than the reflectance coating to the transmitance of visible light to the transmitance of infrared light, and the reflectance coating is to infrared
The reflectivity of light is less than the reflectance coating to the reflectivity of visible light.
6. liquid crystal display fingerprint mould group according to claim 5, which is characterized in that the reversed prism structure is located at described anti-
Penetrate film towards the fingerprint sensor photosurface side.
7. liquid crystal display fingerprint mould group according to claim 5, which is characterized in that the backlight module further include: support
Plate；The support plate is located at the side that the reflectance coating deviates from the liquid crystal display panel；
The support plate has through-hole in the field range of the fingerprint sensor, with so that the fingerprint light source issues
Light passed through after reflection from the through-hole.
8. liquid crystal display fingerprint mould group according to claim 1, which is characterized in that the liquid crystal display fingerprint mould group is also wrapped
It includes: optical filter；The optical filter is between the backlight module and the photosurface of the fingerprint sensor.
9. liquid crystal display fingerprint mould group according to claim 8, which is characterized in that the reversed prism structure is located at optical filter
Towards the side of the photosurface of the fingerprint sensor.
10. liquid crystal display fingerprint mould group described in any one of -5,7,8 according to claim 1, which is characterized in that the inverse edge
Mirror structure is located at the upper surface of the photosurface of the fingerprint sensor.
11. liquid crystal display fingerprint mould group according to claim 1 to 9, which is characterized in that the display module
It further include cover board, the cover board is located at the top of the liquid crystal display panel；The fingerprint light source is located at the cover board towards the liquid
The vacant locations of crystal panel side.
12. liquid crystal display fingerprint mould group according to claim 11, which is characterized in that the fingerprint light source passes through smooth side
Formula is bonded with the lower surface at the vacant locations on the cover board, so that the light-emitting surface of the fingerprint light source and the cover board
Lower surface is parallel.
13. liquid crystal display fingerprint mould group according to claim 11, which is characterized in that the fingerprint light source passes through bias laid side
Formula is bonded with the lower surface at the vacant locations on the cover board, so that the light-emitting surface of the fingerprint light source and the cover board
There are preset angles for lower surface.
14. liquid crystal display fingerprint mould group according to claim 1 to 9, which is characterized in that the fingerprint light source
Positioned at the side of the light guide plate.
15. fingerprint recognition system under a kind of screen, suitable for the liquid crystal display die set lower section with backlight module to carry out shielding lower light
Learn fingerprint detection, which is characterized in that fingerprint recognition system includes fingerprint light source and fingerprint sensor under the screen；
The fingerprint light source is for providing the light of fingerprint detection, and the fingerprint sensor is for detecting pressing in the liquid crystal
Show the fingerprint image of the finger above mould group, and the field range of the fingerprint sensor is located at the aobvious of the liquid crystal display die set
Show region；
Wherein, the liquid crystal display die set includes liquid crystal display panel and the backlight module that the liquid crystal display panel back side is arranged in, described
Backlight module includes: prism structure, light guide plate and backlight；The side of the light guide plate is provided with the backlight；The rib
Mirror structure is located at the light guide plate towards the side of the liquid crystal display panel；The photosurface of the light guide plate and the fingerprint sensor
Between there are reversed prism structures；The prism structure is opposite with the direction of the prism angle of the reversed prism structure；
The light that the fingerprint light source issues passes sequentially through prism film, the light guide plate and the reversed prism structure after reflection and enters
It is incident upon the photosurface of the fingerprint sensor.
16. fingerprint recognition system under screen according to claim 15, which is characterized in that the backlight module further include: multiple
Close film；The composite membrane is located at the light guide plate towards the side of the liquid crystal display panel；The prism structure includes: the first prism
Structure, first prism structure are located at the composite membrane towards the side of the liquid crystal display panel；
The reversed prism structure includes: the first reversed prism structure；First prism structure and the first reversed prism structure
The direction of prism angle is opposite.
17. fingerprint recognition system under screen according to claim 16, which is characterized in that the backlight module further include: increase
Light film；The bright enhancement film is between the composite membrane and the light guide plate；
The prism structure further include: the second prism structure, second prism structure are located at the bright enhancement film towards described multiple
Close the side of film；The crest line of first prism structure is vertical with the crest line of second prism structure；
The reversed prism structure further include: the second reversed prism structure；Second prism structure and the second reversed prism structure
Prism angle direction it is opposite.
18. fingerprint recognition system under screen according to claim 17, which is characterized in that the fingerprint light source is infrared light
Source；The backlight is visible light source；
The backlight module further include: diffusion barrier；The diffusion barrier is between the bright enhancement film and the light guide plate；
The diffusion barrier is less than the diffusion barrier to the mist degree of visible light to the mist degree of infrared light.
19. fingerprint recognition system under screen according to claim 15, which is characterized in that the fingerprint light source is infrared light
Source；The backlight is visible light source；
The backlight module further include: reflectance coating, the reflectance coating are located at the side that the light guide plate deviates from the liquid crystal display panel；
The reflectance coating is greater than the reflectance coating to the transmitance of visible light to the transmitance of infrared light, and the reflectance coating is to infrared
The reflectivity of light is less than the reflectance coating to the reflectivity of visible light.
20. fingerprint recognition system under screen according to claim 19, which is characterized in that the reversed prism structure is located at described
Reflectance coating towards the fingerprint sensor photosurface side.
21. fingerprint recognition system under screen according to claim 19, which is characterized in that the backlight module further include: branch
Fagging；The support plate is located at the side that the reflectance coating deviates from the liquid crystal display panel；
The support plate has through-hole in the field range of the fingerprint sensor, with so that the fingerprint light source issues
Light passed through after reflection from the through-hole.
22. fingerprint recognition system under screen according to claim 15, which is characterized in that fingerprint recognition system is also under the screen
It include: optical filter；The optical filter is between the backlight module and the photosurface of the fingerprint sensor.
23. fingerprint recognition system under screen according to claim 22, which is characterized in that the reversed prism structure is located at described
Optical filter towards the fingerprint sensor photosurface side.
24. fingerprint recognition system under screen described in any one of 5-19,21,22 according to claim 1, which is characterized in that described
Reversed prism structure is located at the upper surface of the photosurface of the fingerprint sensor.
25. fingerprint recognition system under screen described in any one of 5-21 according to claim 1, which is characterized in that the liquid crystal
Show that mould group further includes cover board, the cover board is located at the top of the liquid crystal display panel；
Wherein, the fingerprint light source is bonded by smooth mode with the lower surface at vacant locations on the cover board, so that described
The light-emitting surface of fingerprint light source is parallel with the lower surface of the cover board；Alternatively,
The fingerprint light source is bonded by bias laid mode with the lower surface at vacant locations on the cover board, so that the fingerprint light
There are preset angles for the lower surface of the light-emitting surface in source and the cover board.
26. fingerprint recognition system under screen described in any one of 5-21 according to claim 1, which is characterized in that the fingerprint light
Source is located at the side of the light guide plate.
27. a kind of electronic equipment characterized by comprising liquid crystal display described in any one of the claims 1-14 refers to
Line mould group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111566.8U CN209625231U (en) | 2018-12-17 | 2018-12-17 | Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822111566.8U CN209625231U (en) | 2018-12-17 | 2018-12-17 | Liquid crystal display fingerprint mould group shields lower fingerprint recognition system and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN209625231U true CN209625231U (en) | 2019-11-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111999935A (en) * | 2020-08-27 | 2020-11-27 | 厦门天马微电子有限公司 | Display module and display device |
| US11631272B2 (en) | 2020-04-22 | 2023-04-18 | Innolux Corporation | Fingerprint identification device |
-
2018
- 2018-12-17 CN CN201822111566.8U patent/CN209625231U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11631272B2 (en) | 2020-04-22 | 2023-04-18 | Innolux Corporation | Fingerprint identification device |
| CN111999935A (en) * | 2020-08-27 | 2020-11-27 | 厦门天马微电子有限公司 | Display module and display device |
| CN111999935B (en) * | 2020-08-27 | 2022-07-12 | 厦门天马微电子有限公司 | Display module and display device |
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