CN110187544A - Display device, liquid crystal display panel and its driving method - Google Patents
Display device, liquid crystal display panel and its driving method Download PDFInfo
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- CN110187544A CN110187544A CN201910580368.2A CN201910580368A CN110187544A CN 110187544 A CN110187544 A CN 110187544A CN 201910580368 A CN201910580368 A CN 201910580368A CN 110187544 A CN110187544 A CN 110187544A
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- 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
- G02F1/13306—Circuit arrangements or driving methods for the control of single liquid crystal cells
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- 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
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
-
- 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
- G02F1/133528—Polarisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Mathematical Physics (AREA)
- Engineering & Computer Science (AREA)
- Liquid Crystal (AREA)
- Human Computer Interaction (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Image Input (AREA)
Abstract
The disclosure provides a kind of display device, liquid crystal display panel and its driving method, is related to field of display technology.The liquid crystal display panel includes display module, backlight module, the first polaroid, the second polaroid, optical waveguide layer, identification light source and identification light sensing circuit.Display module includes liquid crystal layer and the color film layer positioned at liquid crystal layer side, and color film layer includes the multiple filter areas corresponded in each sub-pixel, and liquid crystal layer is used to form cog region, and cog region includes multiple transparent areas corresponding with sub-pixel；Backlight module is set to the backlight side of display module；First polaroid is set to the incident side of liquid crystal layer；Second polaroid is set to the side opposite with the first polaroid of liquid crystal layer；The back side of optical waveguide layer and display module face are arranged, and contact surface with finger for contacting；The light for being at least partially into optical waveguide layer of identification light source transmitting can be overleaf totally reflected between contact surface；Identify that light sensing circuit is set to the side opposite with the second polaroid of the first polaroid.
Description
Technical field
This disclosure relates to field of display technology, in particular to a kind of display device, liquid crystal display panel and liquid crystal
Show the driving method of panel.
Background technique
Currently, realizing that the technology of fingerprint recognition has been widely used on a display panel, wherein have fingerprint recognition
The display panel of function is usually OLED (Organic Light-Emitting Diode, Organic Light Emitting Diode) display surface
Plate, the light that organic luminous layer issues is after fingerprint reflects, then penetrates the screening for being located at side of the organic luminous layer far from finger
Aperture on photosphere and reach fingerprint identification device, to obtain finger print information.But if tool is set in liquid crystal display panel
Foraminate light shield layer, then light shield layer can generate the light of backlight module and block, to be difficult to show image, this makes fingerprint
Identification technology is dfficult to apply to liquid crystal display panel.
It should be noted that information is only used for reinforcing the reason to the background of the disclosure disclosed in above-mentioned background technology part
Solution, therefore may include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
The disclosure aims to overcome that above-mentioned the deficiencies in the prior art, provides a kind of display device, liquid crystal display panel
And the driving method of liquid crystal display panel, the fingerprint recognition based on pinhole imaging system can be realized in liquid crystal mesogens display panel.
According to one aspect of the disclosure, a kind of liquid crystal display panel, including multiple sub-pixels, the liquid crystal display are provided
Panel includes:
Display module, the color film layer including liquid crystal layer and positioned at the liquid crystal layer side, the coloured silk film layer include one a pair of
Multiple filter areas of each sub-pixel described in Ying Yu, the liquid crystal layer are used to form cog region, and the cog region includes multiple and institute
State the corresponding transparent area of sub-pixel；
Backlight module, set on the backlight side of the display module；
First polaroid, set on the incident side of the liquid crystal layer；
Second polaroid, set on the side opposite with first polaroid of the liquid crystal layer；
Optical waveguide layer has opposite contact surface and the back side, and the back side and the display module face are arranged, the contact
Face with finger for contacting；
Identify light source, for emitting light to the optical waveguide layer, and the light for being at least partially into the optical waveguide layer can be
It is totally reflected between the back side and the contact surface；
Identification light sensing circuit is used for set on the side opposite with second polaroid of first polaroid
Incude the light of the identification light source and generate fingerprint signal, the identification light sensing circuit is transparent configuration；
At least partly light that the identification light source issues can be passed through the coloured silk film layer, described after finger reflection
Light area and first polaroid reach the identification light sensing circuit, are referred to being formed on the identification light sensing circuit
Print image.
In a kind of exemplary embodiment of the disclosure, the profile of the corresponding sub-pixel of the transparent area is square
Or it is round, and area is less than the area of the sub-pixel not corresponding with the transparent area.
In a kind of exemplary embodiment of the disclosure, the corresponding sub-pixel of the transparent area with it in row or column
The sub-pixel that direct neighbor connects on direction is same color, and corresponding with the transparent area sub-pixel direct neighbor connects
The area of the sub-pixel is greater than the area for the sub-pixel that indirectly adjacent connects.
In a kind of exemplary embodiment of the disclosure, the sub-pixel corresponding with the transparent area is white for emitting
Light.
In a kind of exemplary embodiment of the disclosure, the received finger reflection light of the adjacent two transparent area institute
Correspondence range on the contact surface is at least partly overlapped；The light that adjacent two transparent area penetrates is in the identification light
Range on sensor circuit is not overlapped.
In a kind of exemplary embodiment of the disclosure, the range of the cog region is identical as the range of the liquid crystal layer,
And each transparent area is uniformly distributed in the cog region, the projection of the identification light sensing circuit on the liquid crystal layer with
The cog region face.
In a kind of exemplary embodiment of the disclosure, the backlight module is down straight aphototropism mode set or side entrance back
Mould group；
If the backlight module is down straight aphototropism mode set, the backlight module includes multiple towards the display module
Backlight, at least partly described backlight are corresponding with the cog region；Backlight corresponding with the cog region shines with first
Intensity shines, and backlight corresponding with the region other than the cog region is shone with the second luminous intensity；First strong light
The product of degree and the light transmittance of the identification light sensing circuit is equal to second luminous intensity；
If the backlight module is side entrance back module, the backlight module includes light guide plate, and the light guide plate has
Opposite light-emitting surface and shady face, the light-emitting surface have reflective site towards the display module, the shady face；It is described
The density that shady face corresponds to the site in the region of the cog region is the first density, and the shady face corresponds to the cog region
The density of the site in region in addition is the second density；First density is greater than second density.
In a kind of exemplary embodiment of the disclosure, further includes:
Touch module is set to the optical waveguide layer towards between the display module, for judging the touch-control position of the finger
It sets, when the position of touch is located at the cog region, to control the identification light sensing circuit according to the light received
Generate fingerprint signal.
According to one aspect of the disclosure, a kind of driving method of liquid crystal display panel is provided, above-mentioned any one is used for
The liquid crystal display panel, comprising:
In the fingerprint recognition period:
Emit light, and the light source for the correspondence cog region at least closing the backlight module to the optical waveguide layer；
The cog region for controlling the liquid crystal layer forms multiple transparent areas；
It controls the identification light sensing circuit and fingerprint signal is generated according to the light received；
In display time interval:
Open the backlight module；
The cog region for controlling the liquid crystal layer is in conventional display state.
In a kind of exemplary embodiment of the disclosure, the liquid crystal display panel further include:
Touch module, set on the optical waveguide layer towards the side of the backlight module；
The driving method further include:
The position of touch of the finger is judged, and when the position of touch is located at the cog region, into the fingerprint
Identify the period.
According to one aspect of the disclosure, a kind of display device is provided, including liquid crystal display described in above-mentioned any one
Panel.
In a kind of exemplary embodiment of the disclosure, the display module is equipped with along the direction perpendicular to the contact surface
Perforative mounting hole, the identification light source are set in the mounting hole；
The display device further include:
Camera module is set in the mounting hole.
The driving method of disclosure display device, liquid crystal display panel and liquid crystal display panel, when carrying out fingerprint recognition,
Backlight module light source corresponding with cog region can be at least closed, and emits identification light into optical waveguide layer from identification light source, meanwhile,
The cog region of liquid crystal layer can form multiple transparent areas that light can be made to penetrate the first polaroid；Do not correspond to contact layer in finger
When the region contact of cog region, the light in optical waveguide layer is totally reflected in contact surface and the back side；When finger is corresponding with contact layer
When the region of cog region contacts, the total reflection condition of the contact area is corrupted such that light can be incident upon hand from contact area
It on finger, and is reflected by finger, when being irradiated to the back side of optical waveguide layer by the light that finger reflects, at least partly the incidence angle of light is not
Meet total reflection condition, so as to after through filter area and the first polaroid, expose to identification light sensing circuit, according to small
Borescopic imaging principle forms fingerprint image on identification light sensing circuit, to identify finger print information.
When displaying an image, backlight module can be opened, and the cog region of controllable liquid crystal layer is in conventional display state, this
When there is no above-mentioned transparent area, can normally show image, the light that identification light sensing circuit will not issue backlight module
It causes to block.It may be implemented in as a result, and carry out fingerprint recognition on liquid crystal display panel.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not
The disclosure can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the disclosure
Example, and together with specification for explaining the principles of this disclosure.It should be evident that the accompanying drawings in the following description is only the disclosure
Some embodiments for those of ordinary skill in the art without creative efforts, can also basis
These attached drawings obtain other attached drawings.
Fig. 1 is signal of the liquid crystal display panel of disclosure embodiment when not contacting with finger the fingerprint recognition period
Figure.
Fig. 2 is schematic diagram of the liquid crystal display panel of disclosure embodiment when contacting fingerprint recognition period and finger.
Fig. 3 is schematic diagram of the liquid crystal display panel of disclosure embodiment in display time interval.
Fig. 4 is the local distribution schematic diagram of the filter area of the liquid crystal display panel of disclosure embodiment.
Fig. 5 is that the display module of the liquid crystal display panel of disclosure embodiment offers the schematic diagram of mounting hole.
Fig. 6 is that the network point distribution of the light guide plate of the side entrance back module of the liquid crystal display panel of disclosure embodiment is shown
It is intended to.
Fig. 7 is the distribution signal of the backlight of the down straight aphototropism mode set of the liquid crystal display panel of disclosure embodiment
Figure.
Description of symbols:
1, display module；11, liquid crystal layer；111, transparent area；101, mounting hole；12, color film layer；121, filter area；122,
Black matrix；13, array substrate；14, color membrane substrates；141, the second substrate；15, pixel electrode；16, public electrode；2, backlight mould
Group；21, light guide plate；22, backlight；3, optical waveguide layer；31, contact surface；32, incidence surface；4, light source is identified；5, light sensing is identified
Circuit；6, the first polaroid；7, the second polaroid；8, touch module；100, camera module.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the disclosure will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.In addition, attached drawing is only the schematic of the disclosure
Diagram, is not necessarily drawn to scale.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures
On, or refer to that certain structure is " direct " and be arranged in other structures, or refer to that certain structure is arranged by the way that another structure is " indirect " in other knots
On structure.
Term "one", " one ", "the", " described " and "at least one" be to indicate that there are one or more elements/groups
At part/etc.；Term " comprising " and " having " is to indicate the open meaning being included and refer in addition to listing
Element/component part/also may be present except waiting other element/component part/etc.；Term " first ", " second " are only as mark
Note uses, and is not the quantity limitation to its object.
Disclosure embodiment provides a kind of liquid crystal display panel, including multiple sub-pixels, as shown in Figure 1-Figure 3, should
Liquid crystal display panel includes display module 1, backlight module 2, optical waveguide layer 3, identification light source 4 and identification light sensing circuit 5, first
Polaroid 6 and the second polaroid 7, in which:
Display module 1 includes liquid crystal layer 11 and the color film layer 12 positioned at 11 side of liquid crystal layer, and color film layer 12 includes one a pair of
It should be used to form cog region in multiple filter areas 121 of each sub-pixel, liquid crystal layer 11, which includes multiple and sub-pixel pair
The transparent area 111 answered, and the corresponding sub-pixel of each transparent area 111.Backlight module 2 is set to the backlight side of display module 1.It leads
Photosphere 3 has opposite contact surface 31 and the back side, and the back side and 1 face of display module are arranged, and contact surface 31 with finger for contacting.
First polaroid 6 is set to the incident side of liquid crystal layer 11；Second polaroid 7 is set to the opposite with the first polaroid 6 of liquid crystal layer 11
Side.
It identifies that light source 4 is arranged towards optical waveguide layer 3, for emitting light to optical waveguide layer 3, and enters at least portion of optical waveguide layer 3
Light splitter can be totally reflected between the back side and contact surface 31 of optical waveguide layer 3.Identify that light sensing circuit 5 is set to the first polarisation
The side opposite with the second polaroid 7 of piece 6, identification light sensing circuit 5 is used to incude the light of identification light source 4 and generation refers to
Line signal, and identify that light sensing circuit 5 is transparent configuration.12 He of light-transmissive coloured silk film layer at least partly reflected by finger
Transparent area 111, and through the first polaroid of light-transmissive 6 of transparent area 111, identification light sensing circuit 5 is reached, to know
Fingerprint image is formed on other light sensing circuit 5.
Disclosure liquid crystal display panel, as shown in figure 3, when carrying out fingerprint recognition backlight module 2 can be closed, by identifying
Light source 4 emits light into optical waveguide layer 3, and the cog region for controlling liquid crystal layer 11 forms multiple transparent areas 111；As shown in Figure 1,
When the region that finger does not correspond to cog region with contact surface 31 contacts, the light in optical waveguide layer 3 occurs in contact surface 31 and the back side
Total reflection；As shown in Fig. 2, when the region that finger and contact surface 31 correspond to cog region contacts, the total reflection of the contact area
Condition is corrupted such that light can be incident upon on finger from the contact area and be reflected by finger, since being reflected into for finger is unrestrained anti-
When penetrating, thus being irradiated to the back side of optical waveguide layer 3 by the light that finger reflects, the incidence angle of at least partly light is unsatisfactory for being totally reflected
Condition, so as to expose to identification light by transparent area 111 and the first polaroid 6 after the filter area 121 through color film layer 12
Line sensor circuit 5 forms fingerprint image on identification light sensing circuit 5 according to pinhole imaging system principle, to identify that fingerprint is believed
Breath.And penetrate the light in the region of liquid crystal layer 11 being located at other than transparent area 111, then the first polaroid 6 can not be penetrated, thus may be used
Pinhole imaging system is realized in modulation by liquid crystal layer 11 to light.
When displaying an image, backlight module 2 can be opened, and controllable liquid crystal layer 11 is in conventional display state, eliminates saturating
Light area 111, to show image to the modulation of light using liquid crystal layer 11, identification light sensing circuit 5 will not be to backlight mould
The light that group 2 issues causes to block.Wherein, if the light that identification light source 4 issues is visible light, can make to identify that light source 4 is not sent out
Light, if the light that identification light source 4 issues is non-visible light, does not have to close identification light source 4 to guarantee display effect.
Each section of disclosure embodiment liquid crystal display panel is described in detail below:
As shown in Figure 1-Figure 3, display module 1 includes liquid crystal layer 11 and color film layer 12, and liquid crystal layer 11 can be used for light
Polarization direction is adjusted, to adjust the degree of light transmission of the first polaroid 6 and the second polaroid 7, concrete principle is herein no longer
It is described in detail.Liquid crystal layer 11 can form cog region, which includes multiple transparent areas 111 corresponding with sub-pixel, and each light transmission
Area 111 corresponds to a sub-pixel, and any sub-pixel at most corresponds to a transparent area 111.It can be penetrated through the light of transparent area 111
First polaroid 6, and the light for penetrating the region other than transparent area 111 cannot then penetrate the first polaroid 6, so as to using respectively
The light that transparent area 111 reflects finger realizes pinhole imaging system on identification light sensing circuit 5.Wherein, liquid crystal layer 11 is driven
The mode for forming transparent area 111 does not do particular determination herein.It can be in the cog region of display time interval, the liquid crystal layer 11 of cog region
Conventional display state, at this point, without transparent area 111, to show that image, cog region can not carry out fingerprint recognition.
It should be noted that cog region is not entity structure, but by pixel electrode 15 and public electrode 16 to liquid crystal
The liquid crystal molecule that transparent area 111 and alternatively non-transparent district are corresponded in layer 11 carries out different controls, and inclined by the first polaroid 6 and second
Region obtained from mating plate 7, only the light of the corresponding partial region of transparent area 111 can be by the first polaroid 6, and other regions
Light then can not penetrate the first polaroid 6, thus, by pixel electrode 15 to the control of liquid crystal layer 11, it can be achieved that cog region
Appearance and elimination.Preferably, only the corresponding partial region light transmission of transparent area 111 and when the lighttight region in other regions, thoroughly
The maximum transmission state of the corresponding liquid crystal display panel of the liquid crystal layer 11 in light area 111, i.e., can be completely through the light of transparent area 111
Through the first polaroid 6, without being stopped by the first polaroid 6, the corresponding liquid crystal of the liquid crystal layer 11 in the other regions of cog region
The minimum transmitance state of display panel can be stopped completely through the light of transparent area 111 by the first polaroid 6.
Color film layer 12 is located at the light emission side or incident side of liquid crystal layer 11, and color film layer 12 includes corresponding in each sub-pixel
Multiple filter areas 121, filter area 121 are only capable of the light through specified wavelength, can limit sub-pixel for emitting light color.Meanwhile color film
Layer 12 further includes lighttight black matrix 122, and black matrix 122 can be separated out multiple filter areas 121 in color film layer 12, wherein
Liquid crystal display panel has multiple pixels, and each pixel includes the identical multiple sub-pixels of quantity, corresponds to same pixel
Each sub-pixel each filter area 121 color it is different.For example: four of four sub-pixels corresponding to same pixel
The color of filter area 121 is respectively that red (R), green (G) and blue (B) and white (W), white can penetrate various visible lights
All-transparent.
Above-mentioned cog region can be the part of liquid crystal layer 11, can also be identical as the range of liquid crystal layer 11.Any light transmission
Area 111 is corresponding with the filter area 121 within the scope of cog region, and each filter area 121 is at most corresponding with a transparent area 111,
The i.e. different corresponding filter areas 121 of transparent area 111 is different.The color of the corresponding filter area 121 of each transparent area 111 is identical；Together
When, identification light source 4 issue light can for white light, different colours light mixed light (such as mixed light of redgreenblue light) or
Person is the light of the same color of filter area 121 corresponding with each transparent area 111, and the light for guaranteeing that identification light source 4 issues can pass through
Color film layer 12, and penetrate transparent area 111.For example, the corresponding filter area 121 of each transparent area 111 is all-transparent, correspond to each light transmission
The sub-pixel in area 111 is for emitting white light.Certainly, the light that identification light source 4 issues is also possible to the non-visible lights such as infrared ray, leads to
The control for crossing transparent area 111 makes the light through transparent area 111 could be electric in identification light sensing through the first polaroid 6
It is imaged on road 5, realizes fingerprint recognition, correspondingly, the inductive layer that can incude non-visible light can be used in identification light sensing circuit 5.
In two filter areas 121 of arbitrary neighborhood be up to one it is corresponding with a transparent area 111, to avoid two transparent areas
111 hypotelorism, and fingerprint image is made crosstalk occur.Any transparent area 111 above-mentioned cog region orthographic projection with it is corresponding
Filter area 121 is completely coincident, that is to say, that the shape and size of the cross section of any transparent area 111 are corresponding with the transparent area 111
Filter area 121 shape and size it is identical.The profile of the corresponding sub-pixel of transparent area 111 is square or circle etc., and its
Area is less than the area of sub-pixel not corresponding with transparent area 111.
In one embodiment, as shown in Figure 1-Figure 3, display module 1 includes the array substrate 13 to box setting and color film
Substrate 14, between array substrate 13 and color membrane substrates 14, array substrate 13 includes the first substrate and is located at the liquid crystal layer 11
For one substrate close to the driving layer of 11 side of liquid crystal layer, driving layer includes the thin film transistor (TFT) of array distribution.Color membrane substrates 14 include
Above-mentioned color film layer 12 and the second substrate 141, color film layer 12 are laminated in the second substrate 141 close to the side of liquid crystal layer 11.
In another embodiment, display module further includes the first substrate and the second substrate to box setting, liquid crystal layer position
Between first substrate and the second substrate, wherein first substrate includes array substrate and above-mentioned color film layer, and color film layer is set to battle array
Between column substrate and liquid crystal layer.
For example, the quantity of pixel electrode 15 is multiple, and can array distribution in liquid crystal layer 11 and array substrate 13 it
Between, pixel electrode 15 is arranged in a one-to-one correspondence with each filter area 121, and is corresponded in each sub-pixel, that is to say, that Mei Getou
Light area 111 is corresponding with a pixel electrode 15；Meanwhile with corresponding relationship filter area 121 and pixel electrode 15 shape and
Size is consistent.
Public electrode 16 is located between color film layer 12 and liquid crystal layer 11, passes through the electricity between pixel electrode 15 and public electrode 16
The rotation direction of the liquid crystal of liquid crystal layer 11 can be adjusted in field, so as to form or eliminate above-mentioned transparent area 111, so that cog region
In the state with transparent area 111 or without the conventional display state of transparent area 111.The size of the cross section of transparent area 111
It is limited with shape by its corresponding pixel electrode 15.
The corresponding sub-pixel of transparent area 111 with its be expert at or column direction on the sub-pixel that connects of direct neighbor be face of the same race
Color, and the area of sub-pixel that sub-pixel direct neighbor corresponding with transparent area 111 connects is greater than the sub-pixel that indirectly adjacent connects
Area, to meet the requirement of pinhole imaging system.
For example, as shown in Figure 1, any filter area 121 corresponding with transparent area 111 is not less than right with transparent area 111
The filter area 121 answered, for example, as shown in figure 4, each filter area 121 is rectangle, wherein filter area 121a be with one thoroughly
The corresponding filter area in light area 111, with around filter area 121a filter area 121b and filter area 121c not with transparent area 111
It is corresponding, and filter area 121b and filter area 121c are all larger than filter area 121a；Meanwhile two filter area 121b in Fig. 4 and filter
Light area 121a is located at same a line, and is located at the two sides filter area 121a, and size and the filter area 121a of filter area 121b matches, because
And filter area 121b can become larger because of the diminution of filter area 121a, that is, be greater than the filter area 121c not gone together with filter area 121a.
Meanwhile the corresponding pixel electrode 15 of any and transparent area 111 is less than pixel electrode not corresponding with transparent area 111
15, to reduce the size of transparent area 111.
As shown in figure 3, backlight module 2 is set to the backlight side of display module 1, such as array substrate 13 is far from color membrane substrates 14
Side.Backlight module 2 can emit light to display module 1, to show image.Backlight module 2 can be side entering type structure,
Certainly, backlight module 2 is also possible to straight-down negative structure, does not do particular determination herein.
As shown in Figure 1-Figure 3, optical waveguide layer 3 can be the slab construction of transparent material, with opposite contact surface 31 and back
Face, the back side and 1 face of display module are arranged, and contact surface 31 is located at side of the back side far from display module 1, for connecing with finger
Touching.
Optical waveguide layer 3 may also include the incidence surface 32 between contact surface 31 and the back side, and incidence surface 32 can be plane,
It is also possible to curved surface, does not do particular determination herein.
As depicted in figs. 1 and 2, identification light source 4 is arranged towards optical waveguide layer 3, such as sets with 32 face of incidence surface of optical waveguide layer 3
It sets, light can be emitted to incidence surface 32, and identify the face of the luminescent color and the filter area 121 for corresponding to transparent area 111 of light source 4
Color is identical, that is, and it is identical as the luminescent color of sub-pixel of transparent area 111 is corresponded to, to enable the light for identifying that light source 4 issues
Through corresponding to 111 filter area 121 of transparent area.Certainly, it is non-visible that the light that identification light source 4 issues is also possible to infrared ray etc.
Light makes the light through transparent area 111 that could identify light through the first polaroid 6 by the control of transparent area 111
It is imaged on sensor circuit 5, realizes fingerprint recognition, correspondingly, the sense that can incude non-visible light can be used in identification light sensing circuit 5
Answer layer.
Meanwhile identifying at least partly light into optical waveguide layer 3 that light source 4 issues, it can be overleaf between contact surface 31
It is totally reflected, in the case where not destroying total reflection condition, such as the case where the media of 3 two sides of optical waveguide layer does not change
Under, the light of identification light source 4 can be prevented to be emitted from contact surface 31 or the back side.In order to meet total reflection condition, contact surface 31 can be with
Air contact, and the refractive index of optical waveguide layer 3 is greater than the refractive index of air；Display module 1 or other and optical waveguide layer 3 rear-face contact
Film layer refractive index be less than optical waveguide layer 3 refractive index.As shown in Fig. 2, when user's finger and contact surface 31 contact, contact zone
The air of domain A is discharged, and the total reflection condition of contact area A is destroyed, thus light can be emitted and expose to from contact area A
On finger.
As depicted in figs. 1 and 2, identification light sensing circuit 5 is set to the opposite with the second polaroid 7 of the first polaroid 6
Side, for example, being set between the first polaroid 6 and backlight module 2.Each transparent area 111 of above-mentioned cog region with identification light
Sensor circuit 5 is corresponding, i.e. orthographic projection of the transparent area 111 in identification light sensing circuit 5 institute in the plane is located at and identifies light sense
It answers in circuit 5.Identification light sensing circuit 5 is transparent configuration, and the light that can avoid issuing backlight module 2 causes to block,
In, which is not limited to fully transparent, is also possible to translucent or local transparent, but if local transparent, then thoroughly
Needed for the range in bright region should be able to meet the identification to fingerprint image, for example, the range of transparent region is greater than identification light sense
80% etc. of 5 entire scope of circuit is answered, does not do particular determination herein.
It should be noted that if backlight module 2 is side entrance back module, and including light source and light guide plate, then identify light
As long as line sensor circuit 5 is located at the side opposite with the second polaroid 7 of the first polaroid 6, for example, be located at light guide plate and
Between display module 1, one or more layers also settable optical diaphragm between light sensing circuit 5 and display module 1 is identified.If back
Optical mode group 2 is down straight aphototropism mode set, the light source including multiple array distributions, if identification light sensing circuit 5 in light source and
Between display module 1, one or more layers also settable optical diaphragm between light sensing circuit 5 and display module 1 is identified.
Identification light sensing circuit 5 can be independent IC chip, be also possible to be integrated in display module 1
Circuit, for example, the pixel-driving circuit with the array substrate of display module 1 is integrated in same circuit board, alternatively, identification light sense
Circuit 5 is answered to be also possible to the circuit independently of display module 1.
As depicted in figs. 1 and 2, according to the principle of pinhole imaging system, the light reflected by finger that transparent area 111 penetrates,
Fingerprint image is formed on identification light sensing circuit 5, identification light sensing circuit 5 can carry out photoelectric conversion, so as to according to finger
The light of reflection obtains the electric signal that can reflect finger print information, and this will not be detailed here for specific principle of induction.For example, light is identified
Line sensor circuit 5 may include the sensing unit of multiple array distributions, to be received respectively through each transparent area 111 and through first
The light of polaroid 6.
Since identification light sensing circuit 5 may cause to be lost to light, in order to improve liquid crystal display panel brightness
Uniformity, therefore:
In one embodiment, backlight module 2 is side entrance back module comprising backlight and light guide plate 21, it is guide-lighting
Plate 21 has opposite light-emitting surface and shady face, and the light-emitting surface and 1 face of display module are arranged, and it is separate that shady face is located at light-emitting surface
The side of display module 1, and shady face has multiple reflective sites.
As shown in fig. 6, the shady face of light guide plate 21 region corresponding with identification light sensing circuit 5 is first area S1,
The density of the site of first area S1 is the first density, and the shady face is corresponding with the region other than identification light sensing circuit 5
Region is second area S2, and the density of the site of second area S2 is the second density.The first density can be made to be greater than the second density, from
And the brightness that light guide plate 21 corresponds to the region of identification light sensing circuit 5 is improved, it is damaged to caused by identification light sensing circuit 5
Consumption compensates, to improve the uniformity of liquid crystal display panel brightness.
In another embodiment, as shown in fig. 7, backlight module 2 is down straight aphototropism mode set, including it is multiple towards display
The backlight 22 of mould group 1, at least partly backlight 22 are corresponding with identification light sensing circuit 5.Just with identification light sensing circuit 5
Pair region be first area S1, the backlight 22 in the S1 of first area is shone with the first luminous intensity, with identification light sensing
The region of region face outside circuit 5 is second area S2, and the backlight 22 in second area S2 is shone with the second luminous intensity.
The product of the light transmittance of first luminous intensity and identification light sensing circuit 5 is equal to the second luminous intensity, thus to identification light sense
It answers loss caused by circuit 5 to compensate, improves the uniformity of liquid crystal display panel brightness.
As depicted in figs. 1 and 2, the accuracy of identification is improved in order to prevent, can make adjacent two transparent areas, the 111 received hand of institute
Range of the digital reflex light on contact surface 31 is at least partly overlapped, so that it is each to identify that light sensing circuit 5 can receive finger
The light of a region reflection, avoids drain sweep fingerprint.Meanwhile the light that adjacent two transparent area 111 penetrates is in identification light sensing electricity
Range on road 5 is spaced apart from each other, i.e., the light that adjacent two transparent area 111 penetrates is in identification light sensing circuit 5 close to color film layer
Range of exposures on 12 surface does not have overlapping region, to avoid finger print information, there are crosstalks, guarantees the accurate of fingerprint recognition
Property.
Further, any transparent area 111 range of the received finger reflection light on contact surface 31 area, greatly
S > L in the area of range of the light penetrated with transparent area 111 on identification light sensing circuit 5, i.e., in Fig. 1 and Fig. 2.
The distance of the intermediate cross-section of the contact surface 31 and transparent area 111 of optical waveguide layer 3, with identification light sensing circuit 5 and
The ratio of distances constant of the intermediate cross-section of transparent area 111 is not less thanThe intermediate cross-section of transparent area 111 is apart from transparent area
The equidistant cross section in 111 both ends.
As shown in Figure 1-Figure 3, the first polaroid 6 is set to the incident side set on liquid crystal layer 11, for example, being set to identification light sense
It answers between circuit 5 and display module 1, the second polaroid 7 is set to the side opposite with the first polaroid 6 of liquid crystal layer 11, for example,
Between display module 1 and optical waveguide layer 3.First polaroid 6 is used to the light beam that backlight module 2 generates being converted to polarised light,
Second polaroid 7 is for parsing through the modulated polarised light of liquid crystal layer 11, to show image and to form cog region, concrete principle
This will not be detailed here.In fingerprint recognition, the light that identification light source 4 issues after handling digital reflex, can pass sequentially through the second polarisation
Piece 7, the transparent area 111 of liquid crystal layer 11 and the first polaroid 6 eventually arrive at identification light sensing circuit 5, form fingerprint image,
In the process, the light that the transparent area 111 of liquid crystal layer 11 and the region other than transparent area 111 can be such that finger reflects is in difference
Polarization state, and fingerprint image could be formed according to pinhole imaging system principle by the first polaroid 6 through the light of transparent area 111
Picture, and the first polaroid 6 cannot then be penetrated with the light of exterior domain by penetrating transparent area 111, avoid impacting fingerprint image.
The liquid crystal display panel of disclosure embodiment may also include touch module 8, be set to optical waveguide layer 3 towards display module
1 side, such as between optical waveguide layer 3 and the second polaroid 7, for judging the position of touch of finger, and in position of touch
When corresponding to the region for identifying light sensing circuit 5, control identification light sensing circuit 5 is generated according to the identification light received
Fingerprint signal.Touch module 8 may include the first touch control electrode, insulating layer and the second touch control electrode stacked gradually, not right herein
Its specific structure makees particular determination.
Disclosure embodiment also provides a kind of driving method of liquid crystal display panel, the liquid crystal for above embodiment
Display panel, the driving method include:
In the fingerprint recognition period:
Emit light, and the light source for the correspondence cog region at least closing the backlight module to the incidence surface；
The cog region for controlling the liquid crystal layer forms the transparent area of multiple light transmissions；
It controls the identification light sensing circuit and fingerprint signal is generated according to the light received；
In display time interval:
Open the backlight module；
The cog region for controlling the liquid crystal layer is in conventional display state.
In the driving method of disclosure embodiment, as depicted in figs. 1 and 2, in the fingerprint recognition period, backlight module 2
In, the light source at least corresponding to the cog region does not shine, and identifies that light source 4 shines, and the transmission of transparent area 111 of liquid crystal layer 11
The light reflected by finger can pass through the first polaroid 6 and reach identification light sensing circuit 5, at this point, liquid crystal display panel is not
It shows image, and is only used for carrying out fingerprint recognition；As shown in figure 3, backlight module 2 shines, and liquid crystal layer 11 is not in display time interval
With transparent area 111, at this point, liquid crystal display panel displayable image, and without fingerprint recognition, wherein if identification light source 4 is sent out
Light out is visible light, then can make to identify that light source 4 does not shine, to guarantee display effect, if the light that identification light source 4 issues is
Non-visible light does not have to then close identification light source 4.Fingerprint recognition can be realized on liquid crystal display panel as a result,.
For the above-mentioned liquid crystal display panel with touch module 8, the structure of touch module 8 and position be can refer to above
Touch module 8, details are not described herein, be based on this, above-mentioned driving method further include:
The position of touch of the finger is judged, and when the position of touch is located at the cog region, into the fingerprint
Identify the period.
In addition, although describing each step of method in the disclosure in the accompanying drawings with particular order, this does not really want
These steps must be executed in this particular order by asking or implying, or having to carry out step shown in whole could realize
Desired result.Additional or alternative, it is convenient to omit multiple steps are merged into a step and executed by certain steps, and/
Or a step is decomposed into execution of multiple steps etc..
Disclosure embodiment also provides a kind of display device, the display device can be used for mobile phone, tablet computer or its
Its terminal device, will not enumerate herein.The display device includes the liquid crystal display panel of above embodiment simultaneously, herein
No longer elaborate to the beneficial effect of the structure of the liquid crystal display panel and the display device.
In addition, mounting hole 101 can be along vertical as shown in figure 5, display module 1 is equipped with the mounting hole 101 through display module 1
Directly extend in the direction of contact surface 31.Identification light source 4 is located in mounting hole 101, and settable camera module in mounting hole 101
100.And identification light source 4 and camera module 100 are not overlapped in the orthographic projection of contact surface 31, and identification light source 4 is avoided to stop camera shooting mould
100 shooting image of group.So as to place identification light source 4 using the space for placing camera module 100, space is saved.
The shape of mounting hole 101 can be round, rectangle or other close-shaped, lead alternatively, mounting hole 101 can also be opened in
The edge of photosphere 3, cross section can be the not closed shapes such as U-shaped, semicircle.Identify that light source 4 can shine towards optical waveguide layer 3.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to its of the disclosure
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the disclosure, these modifications, purposes or
Person's adaptive change follows the general principles of this disclosure and including the undocumented common knowledge in the art of the disclosure
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the disclosure are by appended
Claim is pointed out.
Claims (12)
1. a kind of liquid crystal display panel, including multiple sub-pixels, which is characterized in that the liquid crystal display panel includes:
Display module, the color film layer including liquid crystal layer and positioned at the liquid crystal layer side, it is described coloured silk film layer include correspond in
Multiple filter areas of each sub-pixel, the liquid crystal layer are used to form cog region, and the cog region includes multiple and the son
The corresponding transparent area of pixel；
Backlight module, set on the backlight side of the display module；
First polaroid, set on the incident side of the liquid crystal layer；
Second polaroid, set on the side opposite with first polaroid of the liquid crystal layer；
Optical waveguide layer has opposite contact surface and the back side, and the back side and the display module face are arranged, and the contact surface is used
It is contacted in finger；
Identify light source, for emitting light to the optical waveguide layer, and the light for being at least partially into the optical waveguide layer can be described
It is totally reflected between the back side and the contact surface；
Light sensing circuit is identified, set on the side opposite with second polaroid of first polaroid, for incuding
The light of the identification light source simultaneously generates fingerprint signal, and the identification light sensing circuit is transparent configuration；
At least partly light that the identification light source issues can be passed through the color film layer, the transparent area after finger reflection
The identification light sensing circuit is reached with first polaroid, to form fingerprint image on the identification light sensing circuit
Picture.
2. liquid crystal display panel according to claim 1, which is characterized in that the corresponding sub-pixel of the transparent area
Profile is square or circle, and area is less than the area of the sub-pixel not corresponding with the transparent area.
3. liquid crystal display panel according to claim 1, which is characterized in that the corresponding sub-pixel of the transparent area with
With its be expert at or column direction on the sub-pixel that connects of direct neighbor be same color, and the sub-pixel corresponding with the transparent area
The area for the sub-pixel that direct neighbor connects is greater than the area for the sub-pixel that indirectly adjacent connects.
4. liquid crystal display panel according to claim 1, which is characterized in that the sub-pixel corresponding with the transparent area
For emitting white light.
5. liquid crystal display panel according to claim 1, which is characterized in that the adjacent two transparent area institute is received described
Correspondence range of the finger reflection light on the contact surface is at least partly overlapped；The light that adjacent two transparent area penetrates exists
Range on the identification light sensing circuit is not overlapped.
6. liquid crystal display panel according to claim 1, which is characterized in that the range of the cog region and the liquid crystal layer
Range it is identical, and each transparent area is uniformly distributed in the cog region, and the identification light sensing circuit is in the liquid crystal
Projection and the cog region face on layer.
7. liquid crystal display panel according to claim 1, which is characterized in that the backlight module is down straight aphototropism mode set
Or side entrance back module；
If the backlight module is down straight aphototropism mode set, the backlight module includes multiple backlights towards the display module
Source, at least partly described backlight are corresponding with the cog region；Backlight corresponding with the cog region is with the first luminous intensity
It shines, backlight corresponding with the region other than the cog region is shone with the second luminous intensity；First luminous intensity with
The product of the light transmittance of the identification light sensing circuit is equal to second luminous intensity；
If the backlight module is side entrance back module, the backlight module includes light guide plate, and the light guide plate has opposite
Light-emitting surface and shady face, for the light-emitting surface towards the display module, the shady face has reflective site；The backlight
The density that face corresponds to the site in the region of the cog region is the first density, and the shady face corresponds to other than the cog region
Region site density be the second density；First density is greater than second density.
8. liquid crystal display panel according to claim 1, which is characterized in that further include:
Touch module, is set to the optical waveguide layer towards between the display module, for judging the position of touch of the finger, with
When the position of touch is located at the cog region, controls the identification light sensing circuit and referred to according to the light generation received
Line signal.
9. a kind of driving method of liquid crystal display panel is used for the described in any item liquid crystal display panels of claim 1-7, special
Sign is, comprising:
In the fingerprint recognition period:
Emit light, and the light source for the correspondence cog region at least closing the backlight module to the optical waveguide layer；
The cog region for controlling the liquid crystal layer forms multiple transparent areas；
It controls the identification light sensing circuit and fingerprint signal is generated according to the light received；
In display time interval:
Open the backlight module；
The cog region for controlling the liquid crystal layer is in conventional display state.
10. driving method according to claim 9, which is characterized in that the liquid crystal display panel further include:
Touch module, set on the optical waveguide layer towards the side of the backlight module；
The driving method further include:
The position of touch of the finger is judged, and when the position of touch is located at the cog region, into the fingerprint recognition
Period.
11. a kind of display device, which is characterized in that including the described in any item liquid crystal display panels of claim 1-8.
12. display device according to claim 11, which is characterized in that the display module is equipped with edge and connects perpendicular to described
The perforative mounting hole in the direction of contacting surface, the identification light source are set in the mounting hole；
The display device further include:
Camera module is set in the mounting hole.
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