CN110045534A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN110045534A CN110045534A CN201910362075.7A CN201910362075A CN110045534A CN 110045534 A CN110045534 A CN 110045534A CN 201910362075 A CN201910362075 A CN 201910362075A CN 110045534 A CN110045534 A CN 110045534A
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- display panel
- light
- light sensing
- sensing device
- film transistor
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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
-
- 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
-
- 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
- G02F1/133308—Support structures for LCD panels, e.g. frames or bezels
- G02F1/133331—Cover glasses
Abstract
The embodiment of the present application provides a kind of display panel and display device, by going out photosphere what light sensation identification layer was fitted in display panel, so as to promote the sensitivity of light sensation identification layer.Meanwhile it can further promote the freedom degree of light sensation identification region setting.The display panel, comprising: the array substrate and counter substrate being oppositely arranged；Glass cover-plate fits in the side that the counter substrate deviates from the array substrate；Light sensation fingerprint recognition layer, between the counter substrate and the glass cover-plate, for detecting and identifying biological fingerprint.
Description
[technical field]
This application involves field of display technology more particularly to a kind of display panel and display devices.
[background technique]
Currently, display technology has penetrated into the various aspects of people's daily life, and correspondingly, more and more materials and skill
Art is used for display screen.Now, fingerprint identification technology is in field of display screen, as carried out very extensive make on mobile phone terminal
With.Wherein, in the classification of fingerprint identification technology there are a variety of, such as capacitance type fingerprint identification technology, light sensation fingerprint identification technology
Deng.
And for using light sensation fingerprint identification technology, usually: when carrying out fingerprint recognition, the light of light source sending
It reflects, is injected in the fingerprint identification unit of specific region via finger, fingerprint identification unit is in turn according to the received reflected light of institute
Line identifies the paddy coning row of the corresponding fingerprint in the region.The design of major part main product at present, in order to prevent to display screen
Light extraction efficiency influence, fingerprint recognition mould group can be integrated in the side of the non-light-emitting surface of display screen in the related technology.So
For how to put on the function of light sensation fingerprint recognition mould group, become a more popular class in current biological fingerprint identification technology
Topic.
[application content]
In view of this, the embodiment of the present application provides a kind of display panel and display device, by by light sensation identification layer
Be fitted in display panel goes out photosphere, so as to promote the sensitivity of light sensation identification layer.Meanwhile it can further promote light
Feel the freedom degree of identification region setting.
On the one hand, the embodiment of the invention provides a kind of display panels, comprising:
The array substrate and counter substrate being oppositely arranged,
Glass cover-plate fits in the side that the counter substrate deviates from the array substrate；
Light sensation fingerprint recognition layer, between the counter substrate and the glass cover-plate, for detecting and identifying biology
Fingerprint.
In one specific embodiment of the application, the display panel further includes the first polaroid, first polarisation
Piece fits between the counter substrate and the light sensation fingerprint recognition layer.
In one specific embodiment of the application, the light sensation fingerprint recognition layer includes multiple light being arranged in array
Sensing unit, for incuding and being fed into the optical signal of the display panel；Wherein, the light sensing unit is light transmission knot
Structure.
In one specific embodiment of the application, the display panel further includes multiple pixel units, wherein an institute
State the corresponding multiple pixel units of covering of light sensing unit.
In one specific embodiment of the application, the light sensing unit includes the light sensor being electrically connected to each other
Part and feed circuit, wherein the feed circuit, for the changing value of the photosignal in the light sensing device to be transmitted
Chip is handled to fingerprint recognition.
In one specific embodiment of the application, the light sensation fingerprint recognition layer further includes gating signal line, for
The feed circuit provides enable signal；Signal transmssion line, for electric signal in the feed circuit to be transferred to the fingerprint
Identifying processing chip；Wherein, the gating signal line intersects with signal transmssion line insulation, defines the light sensing list
Member.
In one specific embodiment of the application, the feed circuit includes the first feed circuit comprising first is thin
Film transistor and the first storage capacitance；The anode of the light sensing device is connected to the first end of first storage capacitance；
The cathode of the light sensing device be connected to the first film transistor source electrode and first storage capacitance second
End.
In one specific embodiment of the application, the grid of the first film transistor is mentioned by the gating signal line
For the enable signal；The drain electrode of the first film transistor is connected to the signal transmssion line；When the light sensor
When light received by part sends variation, the first current signal can be generated；Wherein, first current signal is by through described
The drain electrode of one thin film transistor (TFT) is transmitted to the signal transmssion line.
In one specific embodiment of the application, the anode of the light sensing device and first storage capacitance
First end is connected to the first constant fixed current potential.
In one specific embodiment of the application, the feed circuit includes the second feed circuit comprising second is thin
Film transistor, third thin film transistor (TFT) and the second storage capacitance；Wherein, the grid of second thin film transistor (TFT) is connected to described
The cathode of light sensing device；The source electrode of second thin film transistor (TFT) is connected to the second constant fixed current potential；The third is thin
The grid of film transistor is connected to the gating signal line.
In one specific embodiment of the application, the drain electrode of second thin film transistor (TFT) is connected to the third film
The source electrode of transistor；The drain electrode of the third thin film transistor (TFT) is connected to the signal transmssion line；Second storage capacitance
First end is connected to the cathode of the light sensing device；The second end of second storage capacitance is connected to the constant fixation of third
Current potential；The anode of the light sensing device is connected to pulsed reset signal.
In one specific embodiment of the application, the light received by the light sensing device sends variation
When, first voltage signal is transferred to the signal transmssion line by the feed circuit.
In one specific embodiment of the application, the light sensing device includes photosensitive structure, is located at the light
Between the anode of sensing device and the cathode of the light sensing device；The photosensitive structure is made of polysilicon and amorphous silicon
P-I-N structure.
In one specific embodiment of the application, the cathode of multiple light sensing devices is electrically connected to each other；It is described
The cathode of light sensing device including transparent metal material by being made.
In one specific embodiment of the application, the display panel further includes the second polaroid, second polarisation
Piece is affixed on the side that the array substrate deviates from the counter substrate；The counter substrate includes color membrane substrates, the coloured silk film base
Plate includes black matrix layer and multiple colored light-filtering units in matrix arrangements.
In one specific embodiment of the application, the light sensation fingerprint recognition layer is formed on flexible base board；By turning
Technique is printed by the light sensation fingerprint recognition layer, is transferred to side of the counter substrate far from the array substrate.
On the other hand, the embodiment of the present application provides a kind of display device, and the display device includes above-mentioned display panel.
A kind of display panel provided by the embodiments of the present application and display device, by the way that light sensation identification layer is fitted in display surface
Plate goes out photosphere, and light sensing device in light sensation identification layer is made of transparent translucent material.To avoid to display surface
The influence of plate light emission rate, by that can guarantee the light inlet by light sensation identification layer, so as to promote its sensitivity.
In addition, the whole face to display panel may be implemented by the photosphere out that light sensation identification layer is fitted in display panel
Attaching light sensation identification layer also may be implemented local attaching, to improve the freedom degree of light sensation identification region design.It can basis
The design requirement of display device or display terminal realizes that the light sensation identification region of low cost customizes design.Furthermore due to this Shen
Please in by by light sensation identification layer be fitted in display panel go out photosphere, so as to save light colimated light system, to save
The thicknesses of layers of light sensation identification layer saves process costs.
[Detailed description of the invention]
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached
Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field
For those of ordinary skill, without creative efforts, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the structural schematic diagram of display panel in the related technology；
Fig. 2 is the structural schematic diagram of display panel 10 provided by the embodiment of the present application；
Fig. 3 is the another structural schematic diagram of display panel 10 in Fig. 2；
Fig. 4 is another structural schematic diagram of display panel 10 in Fig. 2；
Fig. 5 is the part perspective view of the explosion of display panel in Fig. 2；
Fig. 6 is the structural schematic diagram of light sensation fingerprint recognition layer 14 in Fig. 2；
Fig. 7 is feed circuit 141b equivalent circuit diagram in Fig. 6；
Fig. 8 is the another equivalent circuit diagram of feed circuit 141b in Fig. 6；
Fig. 9 be in Fig. 6 light sensing device 144a along the cross section structure schematic diagram of aa ' line；
Figure 10 is the production process schematic diagram of display panel 10 provided by the embodiment of the present application；
Figure 11 is the course of work schematic diagram of the application light sensation fingerprint recognition layer 14；
Figure 12 is the structural schematic diagram of display device provided by the embodiment of the present application.
[specific embodiment]
In order to better understand the technical solution of the application, the embodiment of the present application is retouched in detail with reference to the accompanying drawing
It states.
It will be appreciated that described embodiments are only a part of embodiments of the present application, instead of all the embodiments.Base
Embodiment in the application, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
Its embodiment, shall fall in the protection scope of this application.
The term used in the embodiment of the present application is only to be not intended to be limiting merely for for the purpose of describing particular embodiments
The application.In the embodiment of the present application and the "an" of singular used in the attached claims, " described " and "the"
It is also intended to including most forms, unless the context clearly indicates other meaning.
It should be appreciated that term "and/or" used herein is only a kind of incidence relation for describing affiliated partner, indicate
There may be three kinds of relationships, for example, A and/or B, can indicate: individualism A, exist simultaneously A and B, individualism B these three
Situation.In addition, character "/" herein, typicallys represent the relationship that forward-backward correlation object is a kind of "or".
In the description of this specification, it is to be understood that described in the claim of this application and embodiment " substantially ",
The words such as " approximation ", " about ", " about ", " substantially " " generally ", refer within the scope of reasonable technological operation or tolerance model
In enclosing, can generally it accept, rather than an exact value.
It will be appreciated that though film crystalline substance may be described using term first, second, third, etc. in the embodiment of the present application
Body pipe, but these thin film transistor (TFT)s should not necessarily be limited by these terms.These terms are only used to for thin film transistor (TFT) being distinguished from each other out.Example
Such as, in the case where not departing from the embodiment of the present application range, first film transistor can also be referred to as the second thin film transistor (TFT),
Similarly, the second thin film transistor (TFT) can also be referred to as thin film transistor (TFT).
Applicant in this case is by careful further investigation, for the problems in existing the relevant technologies, as shown in Figure 1, with liquid crystal
For display panel, including the drive array substrate 1 and color membrane substrates 2 being oppositely arranged, and the liquid crystal of clamping therebetween
Layer 3, additionally includes and provides the backlight module 5 of light source for liquid crystal display panel.In order to realize light sensation identification function, when previous
In the design scheme of a more mainstream, by the way that light sensation fingerprint recognition layer 4 is integrated on drive array substrate 1, that is to say, that collection
At in liquid crystal display.So in carrying out light sensation fingerprint identification process, the light L that light source issues is reflected via finger, then
Light sensation fingerprint recognition layer 4 is reached by liquid crystal layer 3, the fingerprint identification unit in light sensation fingerprint recognition layer 4 and then according to being received
Reflection light the corresponding fingerprint valley in the region and fingerprint ridge are identified.But since reflection light have passed through liquid crystal layer 3,
In, part reflection light can be absorbed or be reflected by liquid crystal layer 3, so that the amount light for actually entering light sensation fingerprint recognition layer 4 is reduced,
Largely decline so that the light sensation sensitivity of light sensation fingerprint recognition layer 4 has.In order to solve problem above, in the application
In provide a kind of display panel, by by light sensation identification layer be fitted in display panel go out photosphere, so as to promote light
Feel the sensitivity of identification layer.Meanwhile it can further promote the freedom degree of light sensation identification region setting.The specifically display
Panel, comprising: the array substrate and counter substrate being oppositely arranged, glass cover-plate fit in the counter substrate away from the battle array
The side of column substrate；Light sensation fingerprint recognition layer, between the counter substrate and the glass cover-plate, for detecting and identifying
Biological fingerprint.
Specifically as shown in Fig. 1~10, the embodiment of the present application provides a kind of display panel 10, in present embodiment
In, by taking liquid crystal display panel as an example.The display panel includes the array substrate 11 and counter substrate 12 being oppositely arranged, and clamping
Liquid crystal layer 13 therebetween.It additionally includes to the display panel and the backlight module BL of backlight is provided, wherein backlight mould
The side that array substrate 11 deviates from counter substrate 12 is arranged in group BL.It is specific at the application one for array substrate 11
In embodiment, multiple film crystals in matrix arrangements can be formed in array substrate 11 by low temperature polysilicon process
It manages (TFT), and the multiple metal layers of deposition form corresponding signal transmssion line and electrode, such as data signal transmission wire, scanning letter
Number transmission line, public electrode and multiple pixel electrodes being arranged independently of each other, to form the drive array layer of display panel 10.
Specifically, as shown in Figure 2 and Figure 5, multiple pixel unit PX being arranged in array are formed.For counter substrate 12,
In one specific embodiment of the application, which is color membrane substrates, includes black matrix layer on the color membrane substrates and more
A colored light-filtering units (not shown) in matrix arrangements.Specifically, colored light-filtering units may include red filter
Layer, blue color filter layer and green color filter and white filter layer, so that light L is emitted to the external world by liquid crystal layer 13
When, corresponding color is presented, to realize color display mode.
With continued reference to shown in Fig. 2, in one specific embodiment of the application, which further includes the first polarisation
Piece 151 and the second polaroid 152.Wherein, the first polaroid 151 is attached at the outside of counter substrate 12, i.e. display panel goes out
Light side；Second polaroid 152 is set between array substrate 11 and backlight module BL, used to realize to issuing in backlight module BL
Light L converted, and enter liquid crystal layer 13 in.In addition, in another embodiment of the application, the display panel
Can with organic light emission (OLED) display panel, since OLED display panel may be implemented from light, then then be not necessarily to backlight module BL,
It is located at the polaroid that array substrate 11 deviates from luminescent layer without setting simultaneously.It can simply be interpreted as, when the display panel is
When OLED display panel, then it only need to go out photosphere in the display panel and one polaroid is set.In addition, continue as shown in Fig. 2,
In one specific embodiment of the application, in order to realize that the protection to display panel 10 can be inclined such as to the protection of polaroid
Glass cover-plate 16 is set again on the outside of mating plate.In general, glass cover-plate 16 is attached at display panel most by transparent optical cement
Outer layer.
In order to realize detection and identification biological fingerprint, in one specific embodiment of the application, by display panel
Light sensation fingerprint identification function is integrated on 10.With continued reference to shown in Fig. 2, specifically, by the way that light sensation fingerprint recognition layer 14 is arranged
Between counter substrate 12 and glass cover-plate 16.In order to not influence the beam projecting quality of display panel 10, while can save
Light colimated light system in light sensation fingerprint recognition layer 14.In one specific embodiment of the application, by the way that light sensation fingerprint is known
Other layer 14 is arranged between the first polaroid 151 and glass cover-plate 16, that is to say, that the first polaroid 151 fits in opposed base
Between plate 12 and light sensation fingerprint recognition layer 14.Wherein, it should be noted that the light sensation fingerprint recognition layer 14 is translucent construction, tool
For body, as shown in figure 5, light sensation fingerprint recognition layer 14 includes multiple light sensing units 141 being arranged in array, for incuding
With the optical signal for being fed into display panel.Wherein, light sensing unit 141 is translucent construction, to guarantee not influence to show
The light extraction efficiency of panel.
As shown in Figure 2 and Figure 5, for light sensation fingerprint recognition layer 14, the realization process of light sensation fingerprint identification function
Substantially are as follows: when carrying out fingerprint recognition, the light L that light source issues, which is reached, touches main body (such as finger), and light is through touching main body (such as
Finger) it reflects, the light L of reflection is irradiated to the light sensing list in the light sensation fingerprint recognition layer 14 being arranged in display panel 10
Member 141, light sensation fingerprint recognition layer 14 judges fingerprint valley and fingerprint ridge according to the light received, to realize that biological fingerprint identifies
And detection.
As shown in figure 11, Figure 11 is the schematic diagram of the course of work of light sensation fingerprint recognition layer 14 provided in this embodiment；Light
Feeling fingerprint recognition layer 14 includes that (its hardware is corresponding can be with are as follows: light sensing unit shown in Fig. 5 for light sensing module 001
141), identification module 002 and feedback module 003 (the two is integrated in fingerprint recognition processing chip 144, as shown in figs. 3 4).
When carrying out fingerprint recognition, light source issue light L be irradiated to touch main body (by taking finger as an example), touch main body to light L into
Reflection light is formed after row reflection, reflection light is incident on light sensing module 001, and light sensing module 001 connects for incuding
The light received, identification module 002 are electrically connected with light sensing module 001, for what is received according to light sensing module 001
Light identifies the valley and a ridge of fingerprint；Feedback module 003 is used to the fingerprint results that identification module 002 identifies feeding back to processing
Device (is integrated in fingerprint recognition processing chip 144), to execute corresponding operation.
It is by fitting in the first polaroid 151 in display panel 10 for the light sensation fingerprint recognition layer 14 in the application
Outside, and be translucent construction, thus in the freedom degree of product design for, be very free.Can according to product needs,
It realizes and the design of whole face fingerprint identification function is carried out to display panel 10, regional area setting fingerprint identification function can also be carried out.
Specifically, as shown in Figure 3 and Figure 4, in Fig. 3, light sensation fingerprint recognition floor 14 can be arranged in the part area of display panel
Domain, as dotted line outlines part in Fig. 3.It can also be as shown in figure 4, light sensation fingerprint recognition layer 14 to be arranged in the institute, portion of display panel
There is display area, to realize full frame fingerprint identification function.Wherein, it should be noted that the function of light sensation fingerprint recognition layer 14
Can control can independently carry out with the display control of display panel 10, it is of course possible to realize integrated control, that is to say, that logical
It crosses the same processing chip and realizes the control shown to light sensation fingerprint recognition layer 14 and display panel.Specifically, in the application
In one specific embodiment, as shown in Figure 3 and Figure 4, chip 144 is handled by fingerprint recognition and is realized to light sensation fingerprint recognition layer
14 control；It is realized by display processing chip 114 and the display function of display panel 10 is controlled.Wherein, fingerprint recognition is handled
Chip 144 is bundled on the first flexible circuit board (FPC) 145 by COF (chip on FPC) technique；Display processing chip 114
It is bundled on the second flexible circuit board (FPC) 115 by COF (chip on FPC) technique.It in simple terms, is exactly light sensation fingerprint
Identification layer 14 is that have independent control circuit and chip.
For the specific structure and implementation of light sensation fingerprint recognition layer 14, as shown in Fig. 5~Fig. 9, at the application one
In specific embodiment, light sensation fingerprint recognition layer 14 include multiple light sensing units 141 being arranged in array, for incude and
It is fed into the optical signal of display panel 10.Wherein, the area of light sensing unit 141 can be greater than or equal to display panel 10
On pixel unit PX area.In one concrete mode of the application, it is more that a light sensing unit 141 can correspond to covering
A pixel unit PX.That is, the distribution density of light sensing unit 141 is less than pixel unit PX's under same area
Distribution density.In the case of guaranteeing the sensitivity of light sensation identification, the appropriate unit distribution for reducing light sensing unit 141 is close
Degree, can reduce cost made of technique, while can also promote corresponding process yields.
With continued reference to shown in Fig. 6 and Fig. 9, light sensing unit 141 includes the light sensing device 141a being electrically connected to each other
With feed circuit 141b.Wherein, feed circuit 141b is used to pass the changing value of the photosignal in light sensing device 141a
It is handed to fingerprint recognition processing chip 144.That is, feed circuit 141b is for realizing to corresponding light sensing device
The control and transmission of the electric signal of 141a.In addition, in the light sensation fingerprint recognition layer 14 further include: the letter for the insulation set that intersects
Number transmission line 142 and gating signal line 143, the two define light sensing unit 141.Wherein, signal transmssion line 142 is along the side y
To be extended, and be electrically connected to fingerprint recognition processing chip 144, for electric signal in feed circuit 141b to be transferred to fingerprint
Identifying processing chip 144.Gating signal line 143, is extended in the x-direction, and is electrically connected to fingerprint recognition processing chip 144
(not shown), for providing enable signal to feed circuit 141b.In order to guarantee the high light transmission of light sensation fingerprint recognition layer 14
Rate, in one specific embodiment of the application, signal transmssion line 142 and gating signal line 143 can pass through electrically conducting transparent gold
Belong to pattern layers to be formed, such as by depositing indium tin oxide ITO layer, then performs etching technique and formed.Height both to guarantee
Translucency, the application are not specifically limited the material of signal transmssion line and gating signal line.
In addition, the high transparency in order to guarantee light sensation fingerprint recognition layer 14, light sensing device 141a are also required to be set as
Translucent construction.In one specific embodiment of the application, as shown in figure 9, light sensing device 141a includes photosensitive structure P
And it is located between the anode VDD of light sensing device and the cathode VEE of light sensing device.Wherein, photosensitive structure P is by including
The P-I-N nesting structural embedded control that polysilicon p-si and amorphous silicon a-si is constituted.As shown, the P-I-N nesting structural embedded control is successively wrapped
P-Si (n) layer being layered on top of each other, a-Si (i) layer and a-Si (p) layer are included, when light is radiated in the P-I-N nesting structural embedded control,
The current signal of respective intensities can be converted optical signal into.Certainly, due to using polysilicon p-si and amorphous silicon a-si material, therefore
Photosensitive structure P can guarantee high transparency, meet the requirement of translucent construction.In addition, for the anode VDD of light sensing device
For the cathode VEE of light sensing device, it can both be and be made up of transparent metal material, wherein light sensor
The anode VDD of part is directly electrically coupled to p-Si (n) layer；The cathode VEE of light sensing device is directly electrically coupled to a-Si (p) layer.
In one specific embodiment of the application, the anode VDD of light sensing device is formed by metallic film pattern layers；Pass through
The cathode VEE of transparent metal film pattern layers formation light sensing device.
For the control of light sensing device 141a be by being realized for feed circuit 141b.As shown in fig. 7, at this
Apply for a specific embodiment, the first feed circuit is specifically as follows for feed circuit 141b comprising the first film is brilliant
Body pipe T1 and the first storage capacitance Cst1.Specifically, the anode of light sensing device 141a is connected to the first storage capacitance
The first end of Cst1；The cathode VEE of light sensing device is connected to the source electrode and the first storage capacitance of first film transistor T1
The second end of Cst1.Wherein, the first end of the anode of light sensing device 141a and the first storage capacitance Cst1 are all connected with first
Constant fixed current potential Vcom.Meanwhile the grid of first film transistor T1 provides enable signal by gating signal line 143, also
It is to say that the grid of first film transistor T1 is electrically connected to gating signal line 143；The drain electrode of first film transistor T1 is connected to
Signal transmssion line 142.When the light received by the light sensing device 141a sends variation, the first current signal can be generated
I1.Wherein, the first current signal I1 is transmitted to signal transmssion line 142, is passed by signal by the drain electrode through first film transistor T1
Defeated line 142 feeds back to fingerprint recognition processing chip 144, to complete light sensation fingerprint identification process.
As shown in figure 8, being specifically as follows the second feedback for feed circuit 141b in one specific embodiment of the application
Circuit comprising the second thin film transistor (TFT) T2, third thin film transistor (TFT) T3 and the second storage capacitance Cst.Specifically, second is thin
The grid of film transistor T2 is connected to the cathode of light sensing device 141a；The source electrode of second thin film transistor (TFT) T2 is connected to second
Constant fixed current potential Vdd；The drain electrode of second thin film transistor (TFT) T2 is connected to the source electrode of third thin film transistor (TFT) T3；Third film is brilliant
The drain electrode of body pipe T3 is connected to signal transmssion line 142；The grid of third thin film transistor (TFT) T3 is connected to gating signal line 143；The
The first end of two storage capacitance Cst2 is connected to the cathode of light sensing device 141a；The second end of second storage capacitance Cst2 connects
It is connected to the constant fixed current potential Vcom1 of third；The anode of light sensing device 141a is connected to pulsed reset signal Reset.Its
In, when the light received by the light sensing device 141a sends variation, light sensing device 141a can generate current signal,
The current signal is converted into first voltage signal V1 by the second thin film transistor (TFT) T2 and third thin film transistor (TFT) T3.This
One voltage signal V1 is transmitted to signal transmssion line 142.Fingerprint recognition processing chip 144 is fed back to by signal transmssion line 142 again, from
And complete light sensation fingerprint recognition and detection process.
In embodiment of above, voltage can be fed back or passed through by current system to the realization of feed circuit 141b
Mode is fed back, and can be selected accordingly according to the needs of actual product.Wherein, Voltage Feedback mode can pass through choosing
Logical active mode, more seems stable in terms of control circuit.
In addition, how light sensation fingerprint recognition layer 14 in the application is realized in technique it is integrated with display panel 10,
In one specific embodiment of the application, as shown in Figure 10, realized by way of transfer by light sensation fingerprint recognition layer 14 with
The fitting of display panel 10.Specifically, light sensation fingerprint recognition layer is formed on flexible base board；By transfer printing process by light sensation
Fingerprint recognition layer is transferred to side of the counter substrate far from array substrate.In one embodiment, by transfer substrate
It is initially formed light sensation fingerprint recognition layer 14, light sensation fingerprint recognition layer 14 is then fitted in the first polaroid 151 by transfer modes
Surface.
It continues to refer to figure 1 shown in 0, the manufacturing process of the display panel 10 mainly comprises the steps that
S1: transfer substrate is provided, the glass substrate 17, adhesive layer 18 and polymer resin substrate being layered on top of each other are specifically included
19 (flexible base boards)；
S2: light sensation fingerprint recognition layer 14 is made on polymer resin substrate 19；
S3: removing hard substrate, specifically, by stripping technology by glass substrate 17, the adhesive layer in transfer substrate
18, to form the light sensation fingerprint recognition layer 14 for only having polymer resin substrate 19；
S4: being transferred to glass cover-plate 16, specifically, by way of removing and transferring, passes through coated optical glue-line
161, by light sensation fingerprint recognition layer 14, it is pasted to the inside of glass cover-plate 16, and by stripping technology, by light sensation fingerprint recognition layer
The polymer resin substrate 19 at 14 back sides is removed.It is attached in glass cover-plate 16 from light sensation fingerprint recognition layer 14 is formed
Side；
S5: light sensation fingerprint recognition layer 14 and display panel are integrated, specifically, by such as using optics in laminating type
Glue carries out full laminating type, will be pasted with the glass cover-plate 16 of light sensation fingerprint recognition layer 14, conforms to going out for the first polaroid 151
Photosphere, to complete the preparation of display panel 10.
It is one specific embodiment of the application above, light sensation fingerprint recognition layer 14 and display surface is realized by transfer printing process
Plate is integrated, relatively simple easy in processing step, while process costs are lower.
In conclusion the scheme of the light sensation fingerprint recognition layer 14 in the application, also can integrate in OLED display panel,
Light sensation fingerprint recognition layer 14 is attached at the outside that OLED display panel goes out the polaroid of photosphere.In a specific embodiment
In, which can not include light colimated light system, to reduce the thickness of light sensation fingerprint recognition layer, reduce system
Make cost.
The embodiment of the present application also provides a kind of display devices, and as shown in figure 12, Figure 12 is provided by the embodiment of the present application
Display device structural schematic diagram, which includes above-mentioned display panel 10, is referred on the display panel 10 with light sensation
Line identification region 101.Wherein, the specific structure of display panel 10 is described in detail in the above-described embodiments, herein
It repeats no more.Certainly, display device shown in Figure 12 is only schematically illustrate, which can be such as mobile phone, plate
Computer, laptop, any electronic equipment having a display function of electric paper book or television set etc..
Display panel and display device as provided by the embodiment of the present application, by the way that light sensation identification layer is fitted in display
Panel goes out photosphere, and light sensing device in light sensation identification layer is made of transparent translucent material.To avoid to display
The influence of panel light emission rate, by that can guarantee the light inlet by light sensation identification layer, so as to promote its sensitivity.
In addition, passing through the whole face attaching light sensation for going out photosphere, may be implemented to display panel that light sensation identification layer is fitted in display panel
Local attaching also may be implemented in identification layer, to improve the freedom degree of light sensation identification region design.It can be according to the display device
Or the design requirement of display terminal, realize that the light sensation identification region of low cost customizes design.Furthermore due to passing through in the application
Light sensation identification layer is fitted in the photosphere out of display panel, so as to save light colimated light system, to save light sensation identification
The thicknesses of layers of layer saves process costs.
The foregoing is merely the preferred embodiments of the application, not to limit the application, all essences in the application
Within mind and principle, any modification, equivalent substitution, improvement and etc. done be should be included within the scope of the application protection.
Claims (17)
1. a kind of display panel, which is characterized in that including,
The array substrate and counter substrate being oppositely arranged,
Glass cover-plate fits in the side that the counter substrate deviates from the array substrate；
Light sensation fingerprint recognition layer, between the counter substrate and the glass cover-plate, for detecting and identifying biological fingerprint.
2. display panel according to claim 1, which is characterized in that the display panel further includes the first polaroid, institute
The first polaroid is stated to fit between the counter substrate and the light sensation fingerprint recognition layer.
3. display panel according to claim 1, which is characterized in that the light sensation fingerprint recognition layer includes multiple in array
The light sensing unit of arrangement, for incuding and being fed into the optical signal of the display panel；
Wherein, the light sensing unit is translucent construction.
4. display panel according to claim 3, which is characterized in that the display panel further includes multiple pixel units,
Wherein, a light sensing unit is corresponding covers multiple pixel units.
5. display panel according to claim 1 or 3, which is characterized in that the light sensing unit includes mutually being electrically connected
The light sensing device and feed circuit connect,
Wherein, the feed circuit is known for the changing value of the photosignal in the light sensing device to be transferred to fingerprint
Manage chip in other places.
6. display panel according to claim 5, which is characterized in that the light sensation fingerprint recognition layer further includes,
Gating signal line, for providing enable signal to the feed circuit；
Signal transmssion line handles chip for electric signal in the feed circuit to be transferred to the fingerprint recognition；
Wherein, the gating signal line intersects with signal transmssion line insulation, defines the light sensing unit.
7. display panel according to claim 6, which is characterized in that the feed circuit includes the first feed circuit,
Including first film transistor and the first storage capacitance；
The anode of the light sensing device is connected to the first end of first storage capacitance；
The cathode of the light sensing device be connected to the first film transistor source electrode and first storage capacitance
Second end.
8. display panel according to claim 7, which is characterized in that the grid of the first film transistor is by the choosing
Messenger line provides the enable signal；
The drain electrode of the first film transistor is connected to the signal transmssion line；
When the light received by the light sensing device sends variation, the first current signal can be generated；
Wherein, first current signal is transmitted to the signal transmssion line by the drain electrode through the first film transistor.
9. display panel according to claim 7, which is characterized in that the anode of the light sensing device and described first
The first end of storage capacitance is connected to the first constant fixed current potential.
10. display panel according to claim 6, which is characterized in that the feed circuit includes the second feed circuit,
Including the second thin film transistor (TFT), third thin film transistor (TFT) and the second storage capacitance；
Wherein, the grid of second thin film transistor (TFT) is connected to the cathode of the light sensing device；
The source electrode of second thin film transistor (TFT) is connected to the second constant fixed current potential；
The grid of the third thin film transistor (TFT) is connected to the gating signal line.
11. display panel according to claim 10, which is characterized in that the drain electrode of second film crystal is connected to institute
State the source electrode of third thin film transistor (TFT)；
The drain electrode of the third thin film transistor (TFT) is connected to the signal transmssion line；
The first end of second storage capacitance is connected to the cathode of the light sensing device；
The second end of second storage capacitance is connected to the constant fixed current potential of third；
The anode of the light sensing device is connected to pulsed reset signal.
12. display panel described in 0 or 11 according to claim 1, which is characterized in that received by the light sensing device
Light send variation when, first voltage signal is transferred to the signal transmssion line by the feed circuit.
13. display panel according to claim 5, which is characterized in that the light sensing device includes photosensitive structure, position
Between the anode of the light sensing device and the cathode of the light sensing device；
The photosensitive structure is by including the P-I-N structure that constitutes of polysilicon and amorphous silicon.
14. display panel according to claim 13, which is characterized in that the cathode of the light sensing device is by including saturating
Bright metal material is made.
15. display panel according to claim 2, which is characterized in that the display panel further includes the second polaroid, institute
It states the second polaroid and is affixed on the side that the array substrate deviates from the counter substrate；
The counter substrate includes color membrane substrates, and the color membrane substrates include black matrix layer and multiple colored filters in matrix arrangements
Light unit.
16. any display panel according to claim 1~15, which is characterized in that the light sensation fingerprint recognition layer is formed
In on flexible base board；
By transfer printing process by the light sensation fingerprint recognition layer, it is transferred to one of the counter substrate far from the array substrate
Side.
17. a kind of display device, which is characterized in that the display device includes the described in any item displays of claim 1~15
Panel.
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| CN201910362075.7A CN110045534B (en) | 2019-04-30 | 2019-04-30 | Display panel and display device |
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| CN201910362075.7A CN110045534B (en) | 2019-04-30 | 2019-04-30 | Display panel and display device |
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