CN107316884A - A kind of display panel and display device - Google Patents
A kind of display panel and display device Download PDFInfo
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- CN107316884A CN107316884A CN201710464029.9A CN201710464029A CN107316884A CN 107316884 A CN107316884 A CN 107316884A CN 201710464029 A CN201710464029 A CN 201710464029A CN 107316884 A CN107316884 A CN 107316884A
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- display panel
- photodiode
- recognition module
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- Microelectronics & Electronic Packaging (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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- Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a kind of display panel and display device, display panel includes array base palte, multiple organic light-emitting structures and multiple fingerprint recognition modules on array base palte viewing area；Each fingerprint recognition module is located between adjacent two organic light-emitting structure；Each fingerprint recognition module includes photodiode and storage capacitance；Along the direction away from array base palte, fingerprint recognition module includes first electrode, second electrode and the 3rd electrode；Storage capacitance includes first electrode and second electrode；Photodiode includes second electrode, the 3rd electrode and the PN junction between second electrode and the 3rd electrode；Along the direction away from array base palte, organic light-emitting structure includes anode, negative electrode and the light emitting functional layer between anode and negative electrode；Negative electrode is electrically connected with first electrode and the 3rd electrode respectively.By technical scheme, the processing procedure number of display panel is reduced, the cost of manufacture of display panel is reduced.
Description
Technical field
The present embodiments relate to display technology field, more particularly to a kind of display panel and display device.
Background technology
Fingerprint is all come with body for everyone, with the development of science and technology, in the market occurs in that a variety of carry
The display device of fingerprint identification function, such as mobile phone, tablet personal computer and intelligent wearable device.User carries fingerprint in operation
Before the display device of identification function, it is only necessary to can be carried out Authority Verification with finger touch display unit, simplify authority and test
Card process.
In the existing display device with fingerprint identification function, it can be referred to using the fingerprint recognition module of external hanging type
Line is recognized, i.e., fingerprint recognition module is arranged on into side of the array base palte away from display unit, but the fingerprint of this external hanging type
Unit can influence display device to the development in narrow frame direction.
Fingerprint recognition module can also be integrated in display panel, at present, fingerprint recognition module generally comprises photoelectricity two
Pole pipe and storage capacitance, i.e., along away from array base palte direction, fingerprint recognition module generally comprise first electrode, second electrode,
3rd electrode and the 4th electrode, constitute storage capacitor construction, second electrode and the 3rd electrode between first electrode and second electrode
Photodiode is constituted, the 3rd electrode is electrically connected by the 4th electrode with first electrode, so that fingerprint recognition module is included
More electrode, and because fingerprint recognition module need to be integrated in display panel, adds the processing procedure number of display panel, improve
The cost of manufacture of display panel.
The content of the invention
The present invention provides a kind of display panel and display device, and photoelectricity is realized by the negative electrode for being multiplexed organic light-emitting structure
The electrical connection of 3rd electrode of diode and the first electrode of storage capacitance so that photodiode in fingerprint recognition module and
Storage capacitance forms complete loop, i.e., while display panel fingerprint identification function is realized, reduce display panel
Processing procedure number, reduce the cost of manufacture of display panel.
In a first aspect, the embodiments of the invention provide a kind of display panel, including：
Array base palte, the array base palte includes viewing area and the non-display area around the viewing area；
Multiple organic light-emitting structures and multiple fingerprint recognition modules on the array base palte viewing area；
Each fingerprint recognition module is located between organic light-emitting structure described in adjacent two, for being led according to via touch
The light that body reflexes to the fingerprint recognition module carries out fingerprint recognition；
Each fingerprint recognition module includes photodiode and storage capacitance；Along the side away from the array base palte
To the fingerprint recognition module includes first electrode, second electrode and the 3rd electrode；The storage capacitance includes the described first electricity
Pole and the second electrode；The photodiode includes the second electrode, the 3rd electrode and positioned at described second
PN junction between electrode and the 3rd electrode；
Along the direction away from the array base palte, the organic light-emitting structure includes anode, negative electrode and positioned at the sun
Light emitting functional layer between pole and the negative electrode；The negative electrode is electrically connected with the first electrode and the 3rd electrode respectively.
Second aspect, the embodiment of the present invention additionally provides a kind of display device, including the display panel described in first aspect.
The embodiments of the invention provide a kind of display panel and display device, by setting each fingerprint recognition module to be located at
Between adjacent two organic light-emitting structure, for carrying out fingerprint knowledge according to the light that fingerprint recognition module is reflexed to via touch main body
Not, while display panel fingerprint identification function is realized, fingerprint recognition module has been integrated in display panel.In addition, logical
Crossing each fingerprint recognition module in setting display panel includes photodiode and storage capacitance, along the side away from array base palte
To setting fingerprint recognition module includes first electrode, second electrode and the 3rd electrode, and storage capacitance includes first electrode and second
Electrode, photodiode includes second electrode and the 3rd electrode, is especially provided with the negative electrode of machine ray structure respectively with first
Electrode and the electrical connection of the 3rd electrode, the 3rd electrode and storage electricity of photodiode are realized using the negative electrode of organic light-emitting structure
The electrical connection of the first electrode of appearance so that photodiode and storage capacitance form complete loop, that is, ensure that fingerprint
Recognize that the negative electrode for being multiplexed organic light-emitting structure instead of in module on the premise of photodiode and storage capacitance annexation
4th electrode of the prior art, so carries out fingerprint recognition realizing fingerprint recognition module being integrated in display panel
Meanwhile, the processing procedure number of display panel is reduced, the cost of manufacture of display panel is reduced.
Brief description of the drawings
By reading the detailed description made to non-limiting example made with reference to the following drawings, the application's is other
Feature, objects and advantages will become more apparent upon：
Fig. 1 is a kind of overlooking the structure diagram of display panel provided in an embodiment of the present invention；
Fig. 2 is the cross-sectional view in the BB ' directions along along Fig. 1；
Fig. 3 is a kind of corresponding electrical block diagram of fingerprint recognition module provided in an embodiment of the present invention；
Fig. 4 carries out the fundamental diagram of fingerprint recognition for a kind of fingerprint recognition module provided in an embodiment of the present invention；
Fig. 5 carries out the fundamental diagram of fingerprint recognition for another fingerprint recognition module provided in an embodiment of the present invention；
Fig. 6 is a kind of structural representation of display device provided in an embodiment of the present invention.
Embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched
The specific embodiment stated is used only for explaining the present invention, rather than limitation of the invention.It also should be noted that, in order to just
Part related to the present invention rather than entire infrastructure are illustrate only in description, accompanying drawing.It is same or similar in this specification
Drawing reference numeral represent same or analogous structure, element or flow.It should be noted that in the case where not conflicting, this Shen
Please in embodiment and the feature in embodiment can be mutually combined.
The embodiments of the invention provide a kind of display panel, including array base palte, array base palte includes viewing area and surrounded
The non-display area of viewing area；Multiple organic light-emitting structures and multiple fingerprint recognition modules on array base palte viewing area；Often
Individual fingerprint recognition module is located between adjacent two organic light-emitting structure, for reflexing to fingerprint recognition mould according to via touch main body
The light of group carries out fingerprint recognition；Each fingerprint recognition module includes photodiode and storage capacitance；Along away from array base palte
Direction, fingerprint recognition module include first electrode, second electrode and the 3rd electrode；Storage capacitance includes first electrode and second
Electrode；Photodiode includes second electrode, the 3rd electrode and the PN junction between second electrode and the 3rd electrode；Along far
From the direction of array base palte, organic light-emitting structure includes anode, negative electrode and the light emitting functional layer between anode and negative electrode；
Negative electrode is electrically connected with first electrode and the 3rd electrode respectively.
Everyone including the skin lines including fingerprint on pattern, breakpoint and crosspoint it is different, present uniqueness
And it is constant throughout one's life.Accordingly, we can be mapped a people with his fingerprint, by by his fingerprint and pre-saving
Finger print data is compared, to verify his true identity, here it is fingerprint identification technology.Have benefited from electronics Integrated-manufacturing Techniques
With it is quick and optical finger print identification technology has begun to enter into our daily life in reliable algorithm research, fingerprint identification technology
It is living, it is most deep as being studied in current biological detection, it is most widely used, develop most ripe technology.Optical finger print recognizes skill
The operation principle of art is that the light that light source is sent in display panel is irradiated in touch main body (such as finger), handles digital reflex shape
Into reflected light, the reflected light formed (i.e. fingerprint signal light) is transmitted into fingerprint identification unit, and fingerprint identification unit is to incidence
It is acquired to optical signal thereon.Due to there is specific lines on fingerprint, intensity of reflected light is formed in finger position
Difference, finally causes each fingerprint identification unit that the optical signal collected is different, user real identification can be determined accordingly.
The fingerprint recognition module applied in the prior art generally comprises photodiode and storage capacitance, and photodiode
Loop need to be connected into storage capacitance, along the direction away from array base palte, fingerprint recognition module includes first electrode, the second electricity
Pole, the 3rd electrode and the 4th electrode, first electrode constitute storage capacitance with second electrode, and second electrode and the 3rd electrode constitute light
Electric diode, and the 3rd electrode of photodiode electrically connected by the 4th electrode with the first electrode of storage capacitance.So make
Include more electrode in the fingerprint recognition module that must be integrated in display panel, add the processing procedure number of display panel, carry
The high cost of manufacture of display panel.
The embodiment of the present invention is by setting each fingerprint recognition module to be located between adjacent two organic light-emitting structure, for root
Fingerprint recognition is carried out according to the light that fingerprint recognition module is reflexed to via touch main body, display panel fingerprint identification function is being realized
While, fingerprint recognition module has been integrated in display panel.In addition, by setting each fingerprint recognition mould in display panel
Group includes photodiode and storage capacitance, along the direction away from array base palte, set fingerprint recognition module including first electrode,
Second electrode and the 3rd electrode, storage capacitance include first electrode and second electrode, and photodiode includes second electrode and the
Three electrodes, the negative electrode for being especially provided with machine ray structure is electrically connected with first electrode and the 3rd electrode respectively, utilizes organic hair
The negative electrode of photo structure realizes the electrical connection of the 3rd electrode of photodiode and the first electrode of storage capacitance so that photoelectricity two
Pole pipe and storage capacitance form complete loop, i.e., photodiode and storage capacitance connect in it ensure that fingerprint recognition module
On the premise of connecing relation, the negative electrode for being multiplexed organic light-emitting structure instead of the 4th electrode of the prior art, so realize
Fingerprint recognition module is integrated in while carry out fingerprint recognition in display panel, reduces the processing procedure number of display panel, drop
The low cost of manufacture of display panel.
Above is the core concept of the present invention, below in conjunction with the accompanying drawing in the embodiment of the present invention, to the embodiment of the present invention
In technical scheme be clearly and completely described.Based on the embodiment in the present invention, those of ordinary skill in the art are not having
Make under the premise of creative work, the every other embodiment obtained belongs to the scope of protection of the invention.
Fig. 1 is a kind of overlooking the structure diagram of display panel provided in an embodiment of the present invention, and Fig. 2 is the BB ' sides along along Fig. 1
To cross-sectional view, Fig. 3 is a kind of corresponding circuit structure signal of fingerprint recognition module provided in an embodiment of the present invention
Figure.With reference to Fig. 1, Fig. 2 and Fig. 3, display panel includes array base palte 1, and array base palte 1 includes viewing area AA and around viewing area AA
Non-display area NAA, in addition to multiple organic light-emitting structures 2 and multiple fingerprint recognitions on the viewing area AA of array base palte 1
Module 3, each fingerprint recognition module 3 is located between adjacent two organic light-emitting structure 2, for being reflexed to according to via touch main body
The light of fingerprint recognition module 3 carries out fingerprint recognition.
Wherein, each fingerprint recognition module 3 includes photodiode 31 and storage capacitance 32；Along remote array base palte 1
Direction, fingerprint recognition module 3 includes first electrode 301, the electrode 303 of second electrode 302 and the 3rd, and storage capacitance 32 includes first
Electrode 301 and second electrode 302, photodiode 31 include second electrode 302, the 3rd electrode 303 and positioned at second electrode
302 and the 3rd PN junction 304 between electrode 303.Along away from array base palte 1 direction, organic light-emitting structure 2 include anode 21,
Negative electrode 22 and the light emitting functional layer 23 between anode 21 and negative electrode 22, negative electrode 22 respectively with first electrode 301 and the 3rd
Electrode 303 is electrically connected.So realized using the negative electrode 22 of organic light-emitting structure 2 the 3rd electrode 303 of photodiode 31 with
The electrical connection of the first electrode 301 of storage capacitance 32, makes the photodiode 31 and the shape of storage capacitance 32 in fingerprint recognition module 3
Into complete loop, that is, the circuit structure shown in Fig. 3 is formd, realizing the premise of display panel fingerprint identification function
Under, the negative electrode 22 for being multiplexed organic light-emitting structure 2 instead of the 4th electrode of the prior art, reduce the processing procedure of display panel
Number, reduces the cost of manufacture of display panel.
It should be noted that electricity can also be formed between the electrode 303 of second electrode 302 and the 3rd of fingerprint recognition module 3
Hold structure, the similar storage capacitance formed between first electrode 301 and second electrode 302 of its function.
Optionally, the second electrode of the first voltage signal on the negative electrode 22 of organic light-emitting structure 2 and photodiode 31
The difference of second voltage signal on 302 can be equal to preset voltage value, and photodiode 31 is turned under preset voltage value.Can
Choosing, with reference to Fig. 2 and Fig. 3, display panel can also include multiple thin film transistor (TFT)s 5, one fingerprint of each correspondence of thin film transistor (TFT) 5
Identification module 3 set, each thin film transistor (TFT) 5 include grid 52, source electrode 53 and drain electrode 51, the drain electrode 51 of thin film transistor (TFT) 5 with
The second electrode 302 of corresponding photodiode 31 is electrically connected, for providing second to the second electrode 302 of photodiode 31
Voltage signal.Specifically, photodiode 31 is equal in its second electrode 302 and the voltage signal difference on the 3rd electrode 303
Turned on during preset voltage value, and the 3rd electrode 303 of photodiode 31 is electrically connected with the negative electrode 22 of organic light-emitting structure 2, because
This, when film is brilliant in the second electrode 302 of the first voltage signal on the negative electrode 22 of organic light-emitting structure 2 and photodiode 31
The difference for the second voltage signal that body pipe 5 is provided is turned on when being equal to preset voltage value.Exemplary, photodiode 31 can be turned on
Preset voltage value can be 6.5V, then the size of the first voltage signal on the negative electrode 22 of organic light-emitting structure 2 can for-
Second voltage signal in 5V, the second electrode 302 of photodiode 31 can be 1.5V, and now photodiode 31 is turned on.
Exemplary, as shown in Fig. 2 display panel can also include multiple first film transistors 7, each the first film
One organic light-emitting structure 2 of correspondence of transistor 7 is set, and each first film transistor 7 includes grid 72, source electrode 73 and drain electrode 71,
The drain electrode 71 of first film transistor 7 is electrically connected with the anode 21 of organic light-emitting structure 2, with to the anode of organic light-emitting structure 2
21 conveying data-signals.Organic light-emitting structure 2 also includes the light emitting functional layer 23 being located between anode 21 and negative electrode 22, and light work(
Ergosphere 23 lights to realize the display function of display panel in the presence of the anode 21 and negative electrode 22 of organic light-emitting structure 2.
Optionally, the second electrode 302 of photodiode 31 can be the positive pole of photodiode 31, photodiode 31
The 3rd electrode 303 be photodiode 31 negative pole；Or the second electrode 302 of photodiode 31 can be the pole of photoelectricity two
The negative pole of pipe 31, the 3rd electrode 303 of photodiode 31 is the positive pole of photodiode 31；PN junction 304 can include p-type half
Conductor and N-type semiconductor, photodiode 31, which can also include being located at intrinsic between P-type semiconductor and N-type semiconductor, partly leads
Body.Specifically, when the positive pole that the second electrode 302 of photodiode 31 is photodiode 31, the 3rd of photodiode 31 the
When electrode 303 is the negative pole of photodiode 31, then P-type semiconductor between the electrode 303 of second electrode 302 and the 3rd
In the side for closing on second electrode 302, N-type semiconductor is located at the side for closing on the 3rd electrode 303.Accordingly, when the pole of photoelectricity two
The second electrode 302 of pipe 31 is the negative pole of photodiode 31, and the 3rd electrode 303 of photodiode 31 is photodiode 31
Positive pole when, P-type semiconductor between the electrode 303 of second electrode 302 and the 3rd, which is located at, closes on the one of the 3rd electrode 303
Side, N-type semiconductor is located at the side for closing on second electrode 302.Photodiode 31 can also include being located at P-type semiconductor and N
Intrinsic semiconductor between type semiconductor, i.e. photodiode 31 can be PIN junction diode, by positioned at P-type semiconductor and N
The setting of intrinsic semiconductor between type semiconductor, effectively increases the photosensitive sensitivity of photodiode 31, and then can carry
High display panel carries out the sensitivity of fingerprint recognition.
Below with the negative pole that the second electrode 302 of photodiode 31 is photodiode 31, the 3rd electrode 303 is photoelectricity
Exemplified by the positive pole of diode 31, the fingerprint recognition principle to fingerprint recognition module 3 is illustrated.
Exemplary, with reference to Fig. 2 and Fig. 3, the 3rd electrode 303 and the first electrode of storage capacitance 32 of photodiode 31
301 electrical connections, the drain electrode 51 of thin film transistor (TFT) 5 is electrically connected with second electrode 302, and grid 52 is electrically connected with thread switching control Gate
Connect, source electrode 53 is electrically connected with signal wire Data.Photodiode 31 also include be located at the electrode 303 of second electrode 302 and the 3rd it
Between PN junction 304, PN junction 304 has light sensitive characteristic, and with unilateral conduction.When display panel is in non-illuminated conditions
When, PN junction 304 has the saturation reverse leakage current of very little, i.e. dark current, and now photodiode 31 ends.When display panel by
During illumination, the saturation reverse leakage current of PN junction 304 is greatly increased, and forms photoelectric current.Because the ridge in finger print and paddy are to referring to
The distance of line identification module 3 is different so that the reflected light formed at the position of ridge that fingerprint recognition module 3 is received and in paddy
Position at the intensity of reflected light that is formed it is different, the photoelectric current size being converted into is also just different, and being achieved in that will be via touching
Touch main body and reflex to the light of fingerprint recognition module 3 and be converted into current signal, carry out the identification of fingerprint.
Specifically, in the fingerprint recognition stage, node H1 inputs low voltage signal (such as -5V constant voltage believe by size
Number), signal wire Data high input voltages signal (constant voltage signal that such as size is 1.5V).The whole fingerprint recognition stage can
With including preparatory stage, fingerprint signal acquisition phase and fingerprint signal detection-phase.In the preparatory stage, with fingerprint recognition module 3
The driving chip (not shown) of electrical connection controls thin film transistor (TFT) 5 to turn on by thread switching control Gate, and storage capacitance 32 charges,
Until the charging complete of storage capacitance 32.In the fingerprint recognition stage, closed using thread switching control Gate control thin film transistor (TFT)s 5；
When user presses display panel, the illumination that organic light-emitting structure 2 is sent is incident upon finger, and is reflected to form instead on the surface of finger
Penetrate the photodiode 31 that illumination is incident upon in fingerprint recognition module 3, fingerprint recognition module 3 and receive the reflected light, form photoelectric current,
The direction of photoelectric current is to point to node H1 by node H2, and then H2 current potential is changed.In fingerprint signal detection-phase,
Can direct detection node H2 potential change amount, and then the size of photoelectric current is determined, to realize the fingerprint recognition of display panel
Function.Exemplary, in fingerprint signal detection-phase, it can also be opened using thread switching control Gate control thin film transistor (TFT)s 5,
There is potential difference between the first electrode 301 and second electrode 302 of storage capacitance 32, storage capacitance 32 is in charged state, leads to
The quantity of electric charge that detection storage capacitance 32 is filled with is crossed, and then determines the size of photoelectric current, the finger of display panel can also be equally realized
Line identification function.
Optionally, with reference to Fig. 1 and Fig. 2, the negative electrode 22 of organic light-emitting structure 2 and the electricity of first electrode 301 of storage capacitance 32
The negative electrode 22 that the position of connection can be located at non-display area NAA, i.e. organic light-emitting structure 2 can be realized by the 3rd via 641
With the electrical connection of the first electrode 301 of storage capacitance 32.Optionally, with reference to Fig. 1 and Fig. 2, display panel can also include being located at
The first insulating barrier 61 between first electrode 301 and second electrode 302, second between second electrode 302 and PN junction 304
Insulating barrier 62 and the 3rd insulating barrier 63 between the 3rd electrode 303 and negative electrode 22.Exemplary, as shown in figure 4, second
The 4th insulating barrier 64 can also be included between the insulating barrier 63 of insulating barrier 62 and the 3rd.Wherein, PN junction 304 passes through positioned at the second insulation
First via 621 of layer 62 is electrically connected with second electrode 302, and negative electrode 22 passes through the second via 631 positioned at the 3rd insulating barrier 63
Electrically connected with the 3rd electrode 303.Optionally, with reference to Fig. 2 and Fig. 3, in order that shape between photodiode 31 and storage capacitance 32
Into complete loop, the 3rd electrode 303 of photodiode 31 needs the negative electrode 22 and storage capacitance by organic light-emitting structure 2
32 first electrode 301 is electrically connected, due between the negative electrode 22 of organic light-emitting structure 2 and the first electrode 301 of storage capacitance 32
Also include the first insulating barrier 61, the second insulating barrier 62, the 3rd insulating barrier 63 and the 4th insulating barrier 64, therefore organic light-emitting structure 2
Negative electrode 22 need to electrically connect with the first electrode 301 of storage capacitance 32 by a deep hole, i.e. the negative electrode 22 of organic light-emitting structure 2
The 3rd via 641 through the first insulating barrier 61, the second insulating barrier 62, the 3rd insulating barrier 63 and the 4th insulating barrier 64 can be passed through
Electrically connected with the first electrode 301 of storage capacitance 32.
Optionally, with reference to Fig. 1 and Fig. 2, the negative electrode 22 of organic light-emitting structure 2 can be plane-shape electrode, i.e. organic light emission knot
There are homogeneous voltage signal, i.e. first voltage signal on the negative electrode 22 of structure 2.Optionally, the of each fingerprint recognition module 3
One electrode 301 can be connected.Exemplary, due on the negative electrode 22 of organic light-emitting structure 2 there is homogeneous first voltage to believe
Number, and the negative electrode 22 of organic light-emitting structure 2 electrically connects with the first electrode 301 of each fingerprint recognition module 3, therefore each fingerprint
Recognize the voltage all same in the first electrode 301 of module 3.By setting the first electrode 301 in each fingerprint recognition module 3
It is connected, on the one hand can ensures the current potential all same in the first electrode 301 of each fingerprint recognition module 3.On the other hand, may be used
To realize the negative electrode 22 of the organic light-emitting structure 2 described in the last period by a 3rd deeper via 641 in non-display area NAA
Electrically connected with first electrode 301, that is, realize the negative electrode 22 of organic light-emitting structure 2 and first in all fingerprint recognition modules 3
The effect of the electrical connection of electrode 301.
Specifically, because deep hole technique needs to take greater area of region in display panel relative to shallow bore hole technique,
To a certain extent can fingerprint recognition module 3 occupy display panel area reduce, influence display panel fingerprint recognition detection essence
Degree.In addition, deep hole technique can be also limited positioned at the surrounding organic light-emitting structure 2 of fingerprint recognition module 3, the i.e. increasing of pixel cell area
Plus, limit the increase of display panel aperture opening ratio.The negative electrode 22 and the first of storage capacitance 32 of organic light-emitting structure 2 is so set
The position that electrode 301 is electrically connected is located at non-display area NAA, effectively prevent and beats deep hole to realize in the viewing area AA of display panel
The negative electrode 22 of organic light-emitting structure 2 is electrically connected with the first electrode 301 of storage capacitance 32, is added to a certain extent positioned at aobvious
Show the viewing area AA of panel fingerprint recognition module 3 or the area of organic light-emitting structure 2, effectively increase opening for display panel
Mouth rate, improves the accuracy of detection that display panel carries out fingerprint recognition.
Exemplary, the 3rd insulating barrier 63 can include pixel confining layers.Specifically, display panel can include matrix row
Pixel confining layers are provided between multiple organic light-emitting structures 2 of row, the adjacent organic light-emitting structure 2 of each two so that each
Organic light-emitting structure 2 forms independent dot structure.Exemplary, the first insulating barrier 61, the second insulating barrier 62 and the 3rd insulation
Layer 63 can include SiNxMaterial.Specifically, the first insulating barrier 61 can make the first electrode 301 and photoelectricity two of storage capacitance 32
Mutually insulated between the second electrode 302 of pole pipe 31, the second insulating barrier 62 can make the He of second electrode 302 of photodiode 31
Mutually insulated between 3rd electrode 303, the 3rd insulating barrier 63 can be with the 3rd electrode 303 and organic light emission knot of photodiode 31
Mutually insulated between the negative electrode 22 of structure 2.
Optionally, the material for constituting photodiode 31 can include amorphous silicon material.Exemplary, photodiode 31
P-type semiconductor, N-type semiconductor and the intrinsic semiconductor between P-type semiconductor and N-type semiconductor, wherein P can be included
Type semiconductor can be obtained by the VI races element that adulterated in amorphous silicon material, and N-type semiconductor can be by amorphous silicon material
Middle doping group-III element is obtained, and intrinsic semiconductor directly can be made of amorphous silicon material.Constituted using amorphous silicon material
Photodiode 31 has higher conductance, can effectively improve the accuracy of detection that display panel carries out fingerprint recognition.
Optionally, Fig. 4 carries out the operation principle of fingerprint recognition for a kind of fingerprint recognition module provided in an embodiment of the present invention
Figure.As shown in figure 4, organic light-emitting structure 2 can provide light source for fingerprint recognition module 3, fingerprint recognition module 3 can be according to having
The light that machine ray structure 2 is sent reflexes to fingerprint recognition module 3 to carry out fingerprint recognition via touch main body.Specifically, having
The light that machine ray structure 2 is sent is via the back reflection of main body 4 is touched to fingerprint recognition module 3, due to touching the finger of main body 4, i.e. people
Line has ridge 41 and paddy 42, and ridge 41 is different with the distance of paddy 42 to organic light-emitting structure 2, is touching the ridge 41 of main body 4 and paddy
42 positions form the optical signal difference that intensity of reflected light is different, finally causes each fingerprint recognition module 3 to collect, Jin Ershi
Existing fingerprint identification function, can determine user real identification accordingly.
Optionally, Fig. 5 is former for the work that another fingerprint recognition module provided in an embodiment of the present invention carries out fingerprint recognition
Reason figure.As shown in figure 5, fingerprint recognition module 3 can also include fingerprint recognition light source 8, fingerprint recognition light source 8 is located at array base palte
1 side away from fingerprint recognition module 3, the light that fingerprint recognition module 3 can be sent according to fingerprint recognition light source 8 is via touch
Main body 4 reflexes to fingerprint recognition module 3 to carry out fingerprint recognition, and it carries out the principle and organic light-emitting structure 2 of fingerprint recognition
It is similar as fingerprint recognition principle during light source, repeat no more here.
Exemplary, fingerprint recognition light source 8 can be collimated light source or area source.Compared with using area source, standard is used
Direct light source can weaken crosstalk of the light reflected to form through user's finger fingerprint between different fingerprint recognition modules 3, improve
The precision of fingerprint recognition.But it is due to that collimated light source is often bigger than area source thickness, display panel can be increased using collimated light source
Thickness.
Multiple organic light emissions that the embodiment of the present invention is located on the viewing area AA of array base palte 1 by setting display panel to include
Structure 2 and multiple fingerprint recognition modules 3, set each fingerprint recognition module 3 to include photodiode 31 and storage capacitance 32, edge
Direction away from array base palte 1, sets fingerprint recognition module 3 to include first electrode 301, the electrode of second electrode 302 and the 3rd
303, storage capacitance 32 includes first electrode 301 and second electrode 302, and photodiode 31 includes second electrode 302 and the 3rd
Electrode 303, the negative electrode 22 for being especially provided with machine ray structure 2 is electrically connected with the electrode 303 of first electrode 301 and the 3rd respectively,
The 3rd electrode 303 and the first electricity of storage capacitance 32 of photodiode 31 are realized using the negative electrode 22 of organic light-emitting structure 2
The electrical connection of pole 301, i.e., the premise of photodiode 31 and the annexation of storage capacitance 32 in it ensure that fingerprint recognition module 3
Under, the negative electrode 22 for being multiplexed organic light-emitting structure 2 instead of the 4th electrode of the prior art, so know fingerprint realizing
While other module 3 is integrated in progress fingerprint recognition in display panel, the processing procedure number of display panel is reduced, display surface is reduced
The cost of manufacture of plate.
A kind of display device that the embodiment of the present invention is also provided, Fig. 6 is a kind of display device provided in an embodiment of the present invention
Structural representation.As shown in fig. 6, display device 100 includes the display panel 101 in above-described embodiment, therefore the present invention is real
The display device 100 for applying example offer also possesses beneficial effect described in above-described embodiment, and here is omitted.
Note, above are only presently preferred embodiments of the present invention and institute's application technology principle.It will be appreciated by those skilled in the art that
The invention is not restricted to specific embodiment described here, can carry out for a person skilled in the art it is various it is obvious change,
Readjust and substitute without departing from protection scope of the present invention.Therefore, although the present invention is carried out by above example
It is described in further detail, but the present invention is not limited only to above example, without departing from the inventive concept, also
Other more equivalent embodiments can be included, and the scope of the present invention is determined by scope of the appended claims.
Claims (16)
1. a kind of display panel, it is characterised in that including：
Array base palte, the array base palte includes viewing area and the non-display area around the viewing area；
Multiple organic light-emitting structures and multiple fingerprint recognition modules on the array base palte viewing area；
Each fingerprint recognition module is located between organic light-emitting structure described in adjacent two, for according to anti-via main body is touched
The light for being mapped to the fingerprint recognition module carries out fingerprint recognition；
Each fingerprint recognition module includes photodiode and storage capacitance；Along the direction away from the array base palte, institute
Stating fingerprint recognition module includes first electrode, second electrode and the 3rd electrode；The storage capacitance include the first electrode and
The second electrode；The photodiode includes the second electrode, the 3rd electrode and positioned at the second electrode
PN junction between the 3rd electrode；
Along the direction away from the array base palte, the organic light-emitting structure include anode, negative electrode and positioned at the anode and
Light emitting functional layer between the negative electrode；The negative electrode is electrically connected with the first electrode and the 3rd electrode respectively.
2. display panel according to claim 1, it is characterised in that the negative electrode of the organic light-emitting structure and the storage
The position of the first electrode electrical connection of electric capacity is located at the non-display area.
3. display panel according to claim 1, it is characterised in that the first electricity on the negative electrode of the organic light-emitting structure
The difference of signal and the second voltage signal in the second electrode of the photodiode is pressed to be equal to preset voltage value, the photoelectricity
Diode is turned under the preset voltage value.
4. display panel according to claim 3, it is characterised in that also include：
Multiple thin film transistor (TFT)s, fingerprint recognition module described in each thin film transistor (TFT) correspondence one is set, each film crystal
The drain electrode of pipe is electrically connected with the second electrode of the corresponding photodiode, for the second electrode to the photodiode
The second voltage signal is provided.
5. display panel according to claim 1, it is characterised in that the second electrode of the photodiode is the light
The positive pole of electric diode, the 3rd electrode of the photodiode is the negative pole of the photodiode；Or the photoelectricity two
The second electrode of pole pipe is the negative pole of the photodiode, and the 3rd electrode of the photodiode is the photodiode
Positive pole；
The PN junction include P-type semiconductor and N-type semiconductor, the photodiode also include be located at the P-type semiconductor and
Intrinsic semiconductor between the N-type semiconductor.
6. display panel according to claim 1, it is characterised in that also include：
The first insulating barrier between the first electrode and the second electrode；
The second insulating barrier between the second electrode and the PN junction, the PN junction passes through positioned at second insulating barrier
The first via electrically connected with the second electrode；
The 3rd insulating barrier between the 3rd electrode and the negative electrode, the negative electrode passes through positioned at the 3rd insulating barrier
The second via electrically connected with the 3rd electrode.
7. display panel according to claim 6, it is characterised in that the negative electrode of the organic light-emitting structure passes through through institute
State the 3rd via of the first insulating barrier, second insulating barrier and the 3rd insulating barrier and the first electrode of the storage capacitance
Electrical connection.
8. display panel according to claim 6, it is characterised in that the 3rd insulating barrier includes pixel confining layers.
9. display panel according to claim 6, it is characterised in that first insulating barrier, second insulating barrier and
3rd insulating barrier includes SiNxMaterial.
10. display panel according to claim 1, it is characterised in that described the first of each fingerprint recognition module
Electrode is connected.
11. display panel according to claim 1, it is characterised in that the negative electrode of the organic light-emitting structure is planar electricity
Pole.
12. display panel according to claim 1, it is characterised in that constitute the material of the photodiode including non-
Crystal silicon material.
13. display panel according to claim 1, it is characterised in that the organic light-emitting structure is the fingerprint recognition
Module provides light source, and the light that the fingerprint recognition module is used to be sent according to the organic light-emitting structure is led via described touch
Body reflexes to the fingerprint recognition module to carry out fingerprint recognition.
14. display panel according to claim 1, it is characterised in that the fingerprint recognition module also includes fingerprint recognition
Light source, the fingerprint recognition light source is located at side of the array base palte away from the fingerprint recognition module；The fingerprint recognition
The light that module is used to be sent according to the fingerprint recognition light source reflexes to the fingerprint recognition module via the touch main body
To carry out fingerprint recognition.
15. display panel according to claim 14, it is characterised in that the fingerprint recognition light source is collimated light source or face
Light source.
16. a kind of display device, it is characterised in that including any display panels of claim 1-15.
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| CN201710464029.9A CN107316884B (en) | 2017-06-19 | 2017-06-19 | Display panel and display device |
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| CN201710464029.9A CN107316884B (en) | 2017-06-19 | 2017-06-19 | Display panel and display device |
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| CN107316884B CN107316884B (en) | 2020-08-14 |
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