CN108898073A - Display panel and preparation method thereof and display device - Google Patents
Display panel and preparation method thereof and display device Download PDFInfo
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- CN108898073A CN108898073A CN201810601597.3A CN201810601597A CN108898073A CN 108898073 A CN108898073 A CN 108898073A CN 201810601597 A CN201810601597 A CN 201810601597A CN 108898073 A CN108898073 A CN 108898073A
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- 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
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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
- H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
- H10K59/65—OLEDs integrated with inorganic image sensors
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Abstract
The application discloses a kind of display panel and preparation method thereof and display device, is related to field of display technology, display panel includes the display module being stacked and fingerprint recognition mould group；The display module includes first substrate and multiple organic light-emitting structures on the first substrate, and the fingerprint recognition mould group is located at side of the first substrate far from the organic light-emitting structure；The fingerprint recognition mould group includes at least one fingerprint Identification sensor, and the wave band for the light that the fingerprint Identification sensor can incude includes wave band λ 1,1≤780nm of 380nm≤λ；The first substrate is K, K < 5x10 in the absorptivity of the wave band λ 1‑4.It so, it is possible to ensure that fingerprint Identification sensor can be transferred to via the more light for touching main body reflection, guarantee the sensitivity for also advantageously improving fingerprint recognition while realizing fingerprint identification function.
Description
Technical field
This application involves field of display technology, specifically, being related to a kind of display panel and preparation method thereof and display dress
It sets.
Background technique
Body fingerprint has uniqueness and indeformable, so that the safety of fingerprint recognition is stronger, simultaneously because its is easy to operate,
It is therefore widely used in every field, for example, field of display technology.In field of display technology, take the mobile phone as an example, unlock or
When opening some specific application program, it can be completed by fingerprint recognition.
With the development of science and technology, occurring a variety of display devices with fingerprint identification function in the market, such as mobile phone, plate
Computer and intelligent wearable device etc..In this way, user is before operating the display device with fingerprint identification function, it is only necessary to use
The fingerprint recognition mould group of finger touch display unit, so that it may carry out Authority Verification, simplify Authority Verification process.
The existing display device with fingerprint identification function, a kind of form are presented as the lower fingerprint recognition of screen, i.e. fingerprint is known
Other mould group is located at side of the display module far from light-emitting surface, during fingerprint recognition, via the light for touching main body reflection
It can enter therefore how fingerprint recognition mould group it is enough ensures that fingerprint recognition mould group can recognize by all multiple film layers
Light is to realize that fingerprint identification function becomes technical problem urgently to be resolved at this stage.
Summary of the invention
In view of this, the technical problem to be solved by the application is to provide a kind of display panels and preparation method thereof and display
Device, the first substrate between organic light-emitting structure and fingerprint Identification sensor use lesser first base of absorptivity
Plate guarantees to realize fingerprint recognition to ensure that fingerprint Identification sensor can be transferred to via the more light for touching main body reflection
The sensitivity of fingerprint recognition is also advantageously improved while function.
In order to solve the above-mentioned technical problem, the application has following technical solution：
In a first aspect, the application provides a kind of display panel, the display module including being stacked and fingerprint recognition mould group；
The display module includes first substrate and multiple organic light-emitting structures on the first substrate, described
Fingerprint recognition mould group is located at side of the first substrate far from the organic light-emitting structure；
The fingerprint recognition mould group includes at least one fingerprint Identification sensor, and the fingerprint Identification sensor can incude
The wave band of light include wave band λ 1,1≤780nm of 380nm≤λ；Absorptivity of the first substrate in the wave band λ 1 be
K, K < 5x10-4。
Second aspect, the application provide a kind of preparation method of display panel, including：
First substrate is formed on the rigid substrate, and forms organic light-emitting structure on the first substrate, to be formed
Display module with the rigid substrates, wherein the first substrate is K, K < 5x10 in the absorptivity of wave band λ 1-4；
The display module with rigid substrates is placed on microscope carrier, puts the rigid substrates far from the microscope carrier
It sets, removes the rigid substrates；
Fingerprint recognition mould group is made, and the fingerprint recognition mould group is attached at the first substrate far from organic hair
The side of photo structure, wherein the fingerprint recognition mould group includes at least one fingerprint Identification sensor, the fingerprint recognition sensing
The wave band for the light that device can incude includes the wave band λ 1,1≤780nm of 380nm≤λ.
The third aspect, the application provide a kind of display device, including display panel, which is provided herein
Display panel.
Compared with prior art, display panel described herein and preparation method thereof and display device have reached as follows
Effect：
In display panel provided herein and preparation method thereof and display device, first substrate is located at organic light emission knot
Between structure and fingerprint Identification sensor, needs to reach fingerprint by first substrate rear via the light for touching main body reflection and know
The wave band of individual sensor, the light that fingerprint Identification sensor can sense is 1≤780nm of 380nm≤λ, in particular, the first base
Plate is K, K < 5x10 in the absorptivity of wave band λ 1-4.As K < 5x10-4When, illustrate that first substrate is complete in 380nm-780nm
Wave band does not absorb light substantially, that is to say, that reaches first substrate via the light for touching main body reflection
Afterwards, first substrate will not carry out light to absorb or uptake is negligible, most of light will high efficiency of transmission to fingerprint recognition
Sensor refers to so that fingerprint Identification sensor can sense more via the light for touching main body reflection in realization
Line also advantageously improves the sensitivity of fingerprint recognition while identification.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings：
Fig. 1 show a kind of top view of display panel provided by the embodiment of the present application；
Fig. 2 show a kind of AA ' sectional view of display panel provided by Fig. 1；
Fig. 3 show the absorptivity pair of first substrate provided by the embodiment of the present application with conventional base plate in the prior art
Than figure；
Fig. 4 show another AA ' sectional view of display panel provided by Fig. 1；
Fig. 5 show a kind of film layer structure figure of display module provided by the embodiment of the present application；
Fig. 6 show a kind of equivalent composition figure of fingerprint recognition mould group provided by the embodiment of the present application；
Fig. 7 show a kind of film layer structure figure of fingerprint recognition mould group provided by the embodiment of the present application；
Fig. 8 show a kind of a kind of flow chart of the preparation method of display panel provided by the embodiment of the present application；
Fig. 9 show produced with rigid base using the preparation method of display panel provided by the embodiment of the present application
A kind of structural schematic diagram of the display module of plate；
Figure 10 show a kind of structural schematic diagram being placed in the display module with rigid substrates on microscope carrier；
Figure 11 show a kind of structural schematic diagram after removal rigid substrates；
Figure 12 show a kind of structural schematic diagram that fingerprint recognition mould group is made on microscope carrier；
Figure 13 show a kind of structural schematic diagram of display device provided by the embodiment of the present application.
Specific embodiment
The light that organic light-emitting structure is issued in conventional display panel is usually only necessary to the light-emitting surface of directive display panel
To realize display function, without emitting to the back side of display panel (side i.e. far from display panel light-emitting surface), there is no need to
Consider absorbing state of the underlay substrate to light for being located at display panel reverse side, for flexible display panels, substrate
Yellow is generally presented in substrate.When display panel needs to realize fingerprint identification function, especially fingerprint recognition mould group is located at display
Mould group far from light-emitting surface side when, light needs to first pass through substrate base of the fingerprint Identification sensor close to display module side
Plate can reach fingerprint Identification sensor, if still use yellow underlay substrate, due to yellow underlay substrate for except yellow with
The absorptivity of outer light is higher, this results in fingerprint Identification sensor that can not normally be identified to light, thus nothing
Method realizes fingerprint identification function.
In view of this, the application provides a kind of display panel and preparation method thereof and display device, it is located at organic light emission knot
First substrate between structure and fingerprint Identification sensor uses the lesser first substrate of absorptivity, i.e. absorptivity K < 5x10-4, to ensure that fingerprint Identification sensor can be transferred to via the more light for touching main body reflection, guarantee to realize fingerprint recognition function
The sensitivity of fingerprint recognition is also advantageously improved while energy.
The principle of optical finger print identification is briefly described first.The light irradiation that light source issues in display panel is in one's hands
On finger, handles digital reflex and form transmitting light, be formed by reflected light pass into fingerprint Identification sensor, fingerprint Identification sensor
Optical signal incident thereon is acquired.Since there are specific lines on fingerprint, the ridge and paddy position in finger
The intensity for forming reflected light is different, finally makes the collected optical signal of each fingerprint Identification sensor institute different, and then realize and refer to
Line identification function can determine user real identification accordingly.
Fig. 1 show a kind of top view of display panel provided by the embodiment of the present application, and Fig. 2 show Fig. 1 and provided
Display panel a kind of AA ' sectional view, referring to Fig. 1 and Fig. 2, a kind of display panel 100, including the display module being stacked
101 and fingerprint recognition mould group 102；
Display module 101 includes first substrate 10 and multiple organic light-emitting structures 12 on first substrate 10, is referred to
Line identification mould group 102 is located at side of the first substrate 10 far from organic light-emitting structure 12；
Fingerprint recognition mould group 102 includes at least one fingerprint Identification sensor 13, and fingerprint Identification sensor 13 can incude
The wave band of light include wave band λ 1,1≤780nm of 380nm≤λ；First substrate 10 is K, K < in the absorptivity of wave band λ 1
5x10-4。
Specifically, display panel 100 provided by the present application includes the display module being cascading combined with Figure 1 and Figure 2,
101 and fingerprint recognition mould group 102, fingerprint recognition mould group 102 be located at side of the display module 101 far from light-emitting surface, that is to say, that
Fingerprint Identification sensor 13 in fingerprint recognition mould group 102 is located in display module 101 first substrate 10 far from organic light emission knot
The side of structure 12.In fingerprint identification process, needing via the light for touching the reflection of main body 20 can after first substrate 10
Reach fingerprint Identification sensor 13.The light wave band that fingerprint Identification sensor 13 can incude includes 1≤780nm of 380nm≤λ,
That is, the light of wave band λ 1 can be identified by fingerprint Identification sensor 13, when fingerprint Identification sensor 13 is experienced
Fingerprint identification function, the amount light that fingerprint Identification sensor 13 receives can be realized when a certain amount of light in wave band λ 1
More, fingerprint recognition sensitivity is then higher.In the embodiment of the present application, suction of the first substrate 10 in 1≤780nm of wave band 380nm≤λ
Backscatter extinction logarithmic ratio is K < 5x10-4.Absorptivity is measurement of the substance to the absorbability of the light of certain wavelength, is one kind of substance itself
Physical parameter, at certain condition (monochromatic wavelength, solvent, temperature etc.), absorptivity is the characteristic constant of substance, be can be used as
The qualitative foundation of substance.As K < 5x10-4When, illustrate that first substrate 10 does not have light substantially in 380nm-780nm all band
It is absorbed, that is to say, that for the light reflected via touch main body 20 after reaching first substrate 10, first substrate 10 will not
To light carry out absorb or uptake it is seldom, most of light will high efficiency of transmission to fingerprint Identification sensor 13 so that
Fingerprint Identification sensor 13 can sense the light more reflected via main body 20 is touched, while realizing fingerprint recognition
Also advantageously improve the sensitivity of fingerprint recognition.Optionally, in addition, organic in display panel provided by the embodiment of the present application
Light emitting structure 12 is that fingerprint Identification sensor 13 provides light source；The luminescence band of organic light-emitting structure 12 be λ 2,380nm≤λ 2≤
780nm.In general, wave band is that penetrability of the light of 380nm~780nm in display panel is preferable, it is not easy to be absorbed, therefore
The luminescence band of luminescent material corresponding to organic light-emitting structure 12 is usually 380nm~780nm, and the application passes fingerprint recognition
When the wave band of light that sensor 13 can incude is set as matching with the luminescence band of luminescent material, organic light emission knot can be used
Light source of the light that structure 12 is issued as fingerprint Identification sensor, it is therefore not necessary to be individually added into again for fingerprint Identification sensor outer
Light source is set, to be conducive to save production cost.
Suction below in conjunction with Fig. 3 to first substrate 10 and conventional base plate in the prior art provided by the embodiment of the present application
Backscatter extinction logarithmic ratio compares explanation, and Fig. 3 show first substrate provided by the embodiment of the present application and conventional base plate in the prior art
Absorptivity comparison diagram, test first substrate 10 and conventional base plate respectively under the same conditions 1≤780nm's of 380nm≤λ
Absorptivity can be calculated from Fig. 3, and conventional base plate is only 4.16* in 380nm-780nm all band average absorbance COEFFICIENT K 0
10-3, it is greater than 1.00*10 in the absorptivity K0 of 380-524nm wave band-3, and absorptivity value K0 is greater than 1.00*10-3When, nothing
Effective transmission of method realization fingerprint signal light.This shows that conventional base plate is only capable of normally penetrating the light of 525nm-780nm wave band,
And 380-524nm band signal light will wholly or largely be absorbed, it can not be transferred to fingerprint Identification sensor, because
This cannot achieve signal light normal transmission, also cannot achieve normal fingerprint identification function.And provided by the embodiment of the present application
First substrate 10 is in the basicly stable no absorption of 380nm-780nm all band, absorptivity K < 5x10-4, the embodiment of the present application mentioned
The K value of the first substrate of confession at least an order of magnitude smaller than the K0 value of conventional base plate, therefore be more conducive to more light
It is transferred to fingerprint Identification sensor, is conducive to the sensitivity for greatly promoting fingerprint recognition.
It should be noted that Fig. 2 has been only shown schematically display module 101 and one kind of fingerprint recognition mould group 102 is big
Film layer structure figure is caused, it will be into subsequent content about the detailed film layer structure of display module 101 and fingerprint recognition mould group 102
Row is bright.In addition, the touch main body 20 mentioned in the embodiment of the present application is usually finger, the fingerprint of finger is by being located at finger tip skin
The series of ridges on surface and paddy composition, since the ridge and glass of fingerprint are close to and refractive index is similar with glass, and light is not easy referring to
The ridge of line and the interface of glass are reflected, and between the paddy of fingerprint and glass and not in contact with medium is air, and refractive index is low.
Light reaches glass and the interface of air is easy to happen reflection.Therefore, the ridge of fingerprint and paddy are different for the reflectivity of light,
So that the intensity for the light that fingerprint Identification sensor 13 is experienced is different, the image of fingerprint is generated.In the position place shape of ridge
At the current signal size that is converted into of the reflected light that is formed at the position of paddy of reflected light it is different and then big according to current signal
It is small to carry out fingerprint recognition.It should be noted that touching main body 20 or palm etc., it also can use palmmprint and realize spy
Survey and identification function.
Optionally, first substrate 10 provided by the embodiment of the present application includes polyimides.Polyimides is comprehensive performance
One of optimal high-molecular organic material, -200~300 DEG C of long-term use temperature range, no sharp melting point, and have preferable
Insulation performance, when the first substrate 10 in the embodiment of the present application includes polyimides, so that provided by the embodiment of the present application
First substrate 10 also has the advantages that high temperature resistant, good insulation preformance.
Optionally, the thermal decomposition temperature of first substrate 10 provided by the embodiment of the present application be T0,400 DEG C of T0 >.Also
It is to say, the first substrate 10 of the application has preferable high temperature resistance, the display panel as provided by the embodiment of the present application
In 100, thin film transistor array layer can be generated on first substrate 10, this process needs under high temperature environment (less than 400 °)
It carries out, when thermal decomposition temperature is 400 DEG C of T0 >, it is advantageously ensured that will not be to first substrate 10 in subsequent high temperature production process
Performance impact.
Optionally, the Young's modulus of first substrate 10 provided by the embodiment of the present application is P0,7GPa≤P0≤11GPa.
Young's modulus (Young's modulus (GPa)), also known as stretch modulus (tensile modulus), are elasticity modulus
One of the most common type in (elastic modulus or modulus of elasticity).What Young's modulus was measured is one
The rigidity (stiffness) of isotropic elastic body is defined as in the range that Hooke's law is applicable in, simple stress and uniaxial shape
Ratio between change.Research shows that as Young's modulus > 5GPa there is preferable elasticity.The embodiment of the present application is by first substrate
10 Young's modulus is arranged in 7GPa-11GPa, so that first substrate 10 has good elasticity, can be applied to flexibility
Display panel field.In addition, it is contemplated that first substrate 10 needs to keep certain flexibility can make to show in flexible display panels
Panel realizes flexibility, due to needing to attach far from the side of organic light-emitting structure in first substrate in the display module in the application
Fingerprint recognition mould group, and excessively soft first substrate 10 is detrimental to attach therefore can be soft in order to balance first substrate
Property and the attaching with fingerprint Identification sensor, the application the Young's modulus of first substrate 10 is arranged in 7GPa-11GPa.
Optionally, first substrate 10 provided by the embodiment of the present application with a thickness of D1, wherein 10 μm≤D1≤15 μm.
It is >=10 μm by the thickness design of first substrate 10, first substrate 10 can be made to have preferable water oxygen resistant performance, Neng Gouyou
Effect prevents moisture and oxygen from entering 100 inside of display panel and impacting to organic light-emitting structure 12.Simultaneously, it is contemplated that first
The the thickness of substrate 10 is thicker will be the not pliable, therefore when being≤15 μm by the thickness design of first substrate 10, moreover it is possible to guarantee the
One substrate 10 has preferable bending performance, can be suitable for flexible display panels 100.
Optionally, Fig. 4 show another AA ' sectional view of display panel provided by Fig. 1, in the embodiment, display
Panel 100 further includes light collimation mould group 14, and light collimation mould group 14 is located between display module 101 and fingerprint recognition mould group 102, light
Collimation mould group 14 is used to being converted to the light reflected via touch main body 20 into the light perpendicular to 10 place plane of first substrate
And it is transferred to fingerprint recognition mould group 102.Light collimates the introducing of mould group 14, effectively prevents anti-via 20 different location of main body is touched
The light penetrated exposes to crosstalk phenomenon caused by same fingerprint Identification sensor 13, to be conducive to improve the accurate of fingerprint recognition
Property and precision.The construction of light collimation mould group 14 can refer to the construction of the prior art, such as fibre faceplate production, the application can be used
To this without specifically limiting.
Optionally, Fig. 5 show a kind of film layer structure figure of display module provided by the embodiment of the present application, the embodiment
In, display module 101 include include first substrate 10 and the first film transistor battle array set gradually on first substrate 10
Column layer 15 and organic light-emitting structure 12, first film transistor array layer 15 include the gate metal layer 151 being stacked and source
Drain metal layer 152, organic light-emitting structure 12 include the set gradually along the direction perpendicular to 10 place plane of first substrate
One anode layer 105, pixel defining layer 106, luminous organic material 107 and the first cathode layer 108.First film transistor array layer
15 are provided with driving thin film transistor (TFT) 150, the drain electrode for driving thin film transistor (TFT) 150 and the first anode in organic light-emitting structure 12
Layer 105 is electrically connected.After driving thin film transistor (TFT) 150 in the application is connected, outside under alive driving, hole and electronics point
It is not injected into luminous organic material 107 from first anode layer 105 and the first cathode layer 107, hole and electronics are in organic light emission
It meets in material 107, is compound, giving off energy, then transferring energy to organic luminescent substance in luminous organic material 107
Molecule makes it from ground state transition to excitation state.Excitation state is very unstable, and excited molecule returns to ground state from excitation state, radiation transistion
Luminescence phenomenon is generated, this luminescence phenomenon is based on, the display of picture can be realized by Organic Light Emitting Diode.It should be noted that
On first substrate 10, be additionally provided with gate insulating layer 154, the first semiconductor active layer 153, metallic spacer 155 (for every
From gate metal layer 151 and source-drain electrode metal layer 152), planarization layer 156 (for be isolated source-drain electrode metal layer 152 and first sun
105) and the encapsulated layer 16 positioned at organic light-emitting structure 12 far from 10 side of first substrate pole layer.
Optionally, Fig. 6 show a kind of equivalent composition figure of fingerprint recognition mould group provided by the embodiment of the present application, Fig. 7
It is shown a kind of film layer structure figure of fingerprint recognition mould group provided by the embodiment of the present application, in conjunction with Fig. 6 and Fig. 7, fingerprint recognition
Mould group includes the second substrate 30, the second thin film transistor array layer 320 being arranged in the second substrate 30, fingerprint Identification sensor
13 and storage capacitance 31, multiple switch thin film transistor (TFT) 32, fingerprint recognition sensing are set in the second thin film transistor array layer 320
Device 13 can be presented as light sensitive diode 31.The anode of light sensitive diode 31 is electrically connected with the first electrode of storage capacitance 35, photosensitive
The cathode of diode 31 is electrically connected with the first pole 321 of the second electrode of storage capacitance 35 and switching thin-film transistor 32；Position
Same grid line 33 is connected in the grid of the switching thin-film transistor 32 of same a line, positioned at the switching thin-film transistor 32 of same row
The second pole 322 connect same data signal line 34.PIN layer 312, anode layer 311 and yin in 31 corresponding diagram 7 of light sensitive diode
Pole layer 313, storage capacitance 35 include first electrode layer 351 and the second electrode lay 352, and the second electrode lay 352 and cathode layer 313 are multiple
With；The source-drain electrode metal layer same layer setting of the second electrode lay 352 and switching thin-film transistor 32 and with switching thin-film transistor 32
The first pole 321 and PIN layer 312 be electrically connected, PIN layer 312 and anode layer 311 electrical connection and be stacked in the second electrode lay
352 sides far from gate metal layer, first electrode layer 351 and 323 same layer of gate metal layer are arranged；Anode layer 311 and first
Electrode layer 351 is electrically connected by the first via hole 501, forms capacitor between the second electrode lay 352 and first electrode layer 351.
It should be noted that Fig. 7 it is merely exemplary give a kind of film layer structure figure of fingerprint recognition mould group 102, fingerprint
Identify that the film layer structure of mould group 102 is without being limited thereto, the application is to this without specifically limiting.
In addition, fingerprint recognition mould group 102 can in the orthographic projection of 10 place plane of first substrate to realize full frame fingerprint recognition
It is distributed in the entire viewing area of display panel 100.
Optionally, in display panel 100 provided by the embodiment of the present application, organic light-emitting structure 12 includes emitting red light list
Member, green emitting unit and blue-light-emitting unit；Fingerprint Identification sensor 13 is right in the light institute that emitting red light unit is issued
The absorptivity for answering wave band is K1, and the absorptivity of the wave band corresponding to the light that green emitting unit is issued is K2,
The absorptivity of wave band corresponding to the light that blue-light-emitting unit is issued is K3, wherein K3 > K1, K3 > K2.
Specifically, it is contemplated that organic light-emitting structure 12 leads to brightness with the use meeting aging of time in display panel 100
Decaying, in general, comparing emitting red light unit and green emitting unit, the service life of blue-light-emitting unit is most short, that is to say, that blue
Brightness decay most easily occurs for luminescence unit, therefore, by fingerprint Identification sensor 13 in blue-light-emitting unit in the embodiment of the present application
When the absorptivity of wave band corresponding to the light issued is set as highest, i.e. K3 > K1, K3 > K2, that is, fingerprint recognition pass
Sensor 13 is best to the absorbing state for the light that blue-light-emitting unit is issued, so that even if blue-light-emitting unit brightness is sent out
When raw decaying, fingerprint Identification sensor 13 remains to preferably absorb the light that blue-light-emitting unit is emitted, so that fingerprint be made to know
Individual sensor 13 is able to maintain preferably sensitivity.
Optionally, the absorptivity of wave band corresponding to the light that fingerprint Identification sensor 13 issues each luminescence unit
Meet：K3 > K2 > K1.In view of with the degree of aging for using each luminescence unit of variation of time that can occur it is different, in general,
The service life of the service life > blue-light-emitting unit of the service life > green emitting unit of emitting red light unit, that is,
It says, with the variation for using the time, the brightness decay most serious of blue-light-emitting unit, green emitting unit take second place, red last.
Same material be for the absorptivity of different colours light it is different, in actual adjustment process, be difficult three kinds
The corresponding absorptivity of color is low as adjusting.Therefore, the embodiment of the present application is by fingerprint Identification sensor 13 to blue-light-emitting
The absorptivity of unit emitted light wave band is set as highest, and green emitting unit takes second place, and emitting red light unit is minimum, Ke Yibao
After demonstrate,proving long-time use, fingerprint Identification sensor still is able to preferably absorb blue-light-emitting unit and emitting red light unit institute
The light of sending, so that with using the variation fingerprint Identification sensor 13 of time still to be able to keep good sensitivity.
Optionally, fingerprint Identification sensor 13 provided by the embodiment of the present application includes amorphous silicon, that is, fingerprint recognition sensing
Device 13 is to be based on made of a-Si, high based on 13 high sensitivity of fingerprint Identification sensor made of a-Si, service life, and its energy
The light wave band of induction includes at least 1≤780nm of 380nm≤λ, cooperates with first substrate 10 provided by the embodiment of the present application,
It can preferably realize fingerprint identification function.
Based on the same inventive concept, the application also provides a kind of preparation method of display panel, show referring to Fig. 8, Fig. 8
A kind of a kind of flow chart of the preparation method of display panel, preparation method provided by the embodiment of the present application include：
Step 201 forms first substrate 10 on rigid substrates 400, and forms organic light-emitting junction on first substrate 10
Structure 12, to form the display module 101 for having rigid substrates 400, wherein absorptivity of the first substrate 10 in wave band λ 1 be
K, K < 5x10-4, it show referring to Fig. 9, Fig. 9 and is produced using the preparation method of display panel provided by the embodiment of the present application
The display module with rigid substrates a kind of structural schematic diagram；
Display module 101 with rigid substrates 400 is placed on microscope carrier 500 by step 202, keeps rigid substrates 400 separate
Microscope carrier 500 is placed, and is shown referring to Figure 10, Figure 10 and is shown a kind of structure that the display module with rigid substrates is placed on microscope carrier
It is intended to, removes rigid substrates 400, a kind of structural schematic diagram after removal rigid substrates are shown referring to Figure 11, Figure 11 needs
It is bright, rigid substrates 400 can be removed by way of laser herein；
Step 203, production fingerprint recognition mould group 102, and fingerprint recognition mould group 102 is attached at first substrate 10 far from having
The side of machine light emitting structure 12, wherein fingerprint recognition mould group 102 includes at least one fingerprint Identification sensor 13, fingerprint recognition
The wave band for the light that sensor 13 can incude includes wave band λ 1, and 1≤780nm of 380nm≤λ is shown referring to Figure 12, Figure 12
A kind of structural schematic diagram of fingerprint recognition mould group is made on microscope carrier.
Specifically, in the display panel 100 of the production of method provided by step 201- step 203, fingerprint Identification sensor
The 13 light wave bands that can be incuded include 1≤780nm of 380nm≤λ, that is to say, that the light of wave band λ 1 can be by fingerprint recognition
Sensor 13 is identified, fingerprint identification function can be realized when fingerprint Identification sensor 13 experiences a certain amount of light,
The amount light that fingerprint Identification sensor 13 receives is more, fingerprint recognition sensitivity is then higher.In the embodiment of the present application, the first base
Plate 10 is K < 5x10 in the absorptivity of 1≤780nm of wave band 380nm≤λ-4.As K < 5x10-4When, illustrate that first substrate 10 exists
380nm-780nm all band does not absorb light substantially, that is to say, that exists via the light for touching main body reflection
After reaching first substrate 10, first substrate 10 will not carry out absorbing to light or uptake is negligible, and most of light will be high
Effect is transferred to fingerprint Identification sensor 13, so that fingerprint Identification sensor 13 can sense more via touch main body
The light of reflection also advantageously improves the sensitivity of fingerprint recognition while realizing fingerprint recognition.
Optionally, in above-mentioned steps 201, on rigid substrates 400 formed first substrate 10, further for：
The mixed solution of polyamic acid and N-Methyl pyrrolidone is spread evenly across on rigid substrates 400, wherein polyamides
The weight percent of amino acid is A1, and the weight percent of N-Methyl pyrrolidone is A2,1wt%≤A1≤30wt%, 70wt%
≤ A2≤99wt%；
Heat cure processing is carried out to the mixed solution of polyamic acid and N-Methyl pyrrolidone at heat curing temperature T1, is made
Polymerization reaction occurs for the mixed solution of polyamic acid and N-Methyl pyrrolidone, forms first substrate 10, wherein 300 DEG C≤T1
≤500℃。
Specifically, certain thickness is formd on rigid substrates 400 by the above method with certain mechanical strength and good
The Kapton of good insulation performance, i.e., the first substrate 10 in the application, the first substrate 10 formed by such method,
Advantageously ensure that first substrate 10 1≤780nm of 380nm≤λ absorptivity be K < 5x10-4, in display panel 100 via
The light of main body reflection is touched after reaching first substrate 10, first substrate 10 will not carry out absorbing to light or uptake can neglect
Slightly, most of light will high efficiency of transmission to fingerprint Identification sensor, therefore it is also advantageous while realizing fingerprint identification function
In the sensitivity for improving fingerprint recognition.
Optionally, by the formed first substrate 10 of the above method with a thickness of D1, wherein 10 μm≤D1≤15 μm.It will
The thickness design of first substrate 10 is >=10 μm, and first substrate 10 can be made to have preferable water oxygen resistant performance, can be effective
Prevent moisture and oxygen from entering 100 inside of display panel and impacting to organic light-emitting structure 12.Simultaneously, it is contemplated that the first base
The the thickness of plate 10 is thicker will be the not pliable, thus by the thickness design of first substrate 10 be≤15 μm when, moreover it is possible to guarantee first
Substrate 10 has preferable bending performance, can be suitable for flexible display panels.
Based on the same inventive concept, the application also provides a kind of display device 200, show this Shen referring to Figure 13, Figure 13
Please display device provided by embodiment a kind of structural schematic diagram, which includes display panel 100, the display
Panel 100 is display panel provided by the embodiment of the present application.The embodiment of display device 200 can be found in above-mentioned battle array in the application
The embodiment of column substrate, repeating place, details are not described herein again.It should be noted that display device provided by the embodiment of the present application
200 can be：Mobile phone, tablet computer, television set, display, laptop, Digital Frame, navigator etc. are any with aobvious
Show the products or components of function.
As can be seen from the above embodiments beneficial effect existing for the application is：
In display panel provided herein and preparation method thereof and display device, first substrate is located at organic light emission knot
Between structure and fingerprint Identification sensor, needs to reach fingerprint by first substrate rear via the light for touching main body reflection and know
The wave band of individual sensor, the light that fingerprint Identification sensor can sense is 1≤780nm of 380nm≤λ, in particular, in the wave
The absorptivity of section 1 first substrate of λ is K, K < 5x10-4.As K < 5x10-4When, illustrate that first substrate is complete in 380nm-780nm
Wave band does not absorb light substantially, that is to say, that reaches first substrate via the light for touching main body reflection
Afterwards, first substrate will not carry out light to absorb or uptake is negligible, most of light will high efficiency of transmission to fingerprint recognition
Sensor refers to so that fingerprint Identification sensor can sense more via the light for touching main body reflection in realization
Line also advantageously improves the sensitivity of fingerprint recognition while identification.
Above description shows and describes several preferred embodiments of the present application, but as previously described, it should be understood that the application
Be not limited to forms disclosed herein, should not be regarded as an exclusion of other examples, and can be used for various other combinations,
Modification and environment, and the above teachings or related fields of technology or knowledge can be passed through within that scope of the inventive concept describe herein
It is modified.And changes and modifications made by those skilled in the art do not depart from spirit and scope, then it all should be in this Shen
It please be in the protection scope of appended claims.
Claims (14)
1. a kind of display panel, which is characterized in that including the display module and fingerprint recognition mould group being stacked；
The display module includes first substrate and multiple organic light-emitting structures on the first substrate, the fingerprint
Identification mould group is located at side of the first substrate far from the organic light-emitting structure；
The fingerprint recognition mould group includes at least one fingerprint Identification sensor, the light that the fingerprint Identification sensor can incude
The wave band of line includes wave band λ 1,1≤780nm of 380nm≤λ；The first substrate is K, K < in the absorptivity of the wave band λ 1
5x10-4。
2. display panel according to claim 1, which is characterized in that the first substrate includes polyimides.
3. display panel according to claim 1, which is characterized in that the thermal decomposition temperature of the first substrate is T0, T0
400 DEG C of >.
4. display panel according to claim 1, which is characterized in that the Young's modulus of the first substrate is P0,7GPa
≤P0≤11GPa。
5. display panel according to claim 1, which is characterized in that the first substrate with a thickness of D1, wherein 10 μm
≤D1≤15μm。
6. display panel according to claim 1, which is characterized in that the display panel further includes light collimation mould group, institute
Light collimation mould group is stated between the display module and the fingerprint recognition mould group, the light collimation mould group is used for will be via touching
The light for touching main body reflection is converted to perpendicular to the light of plane where the first substrate and is transferred to the fingerprint recognition mould
Group.
7. display panel according to claim 1, which is characterized in that the organic light-emitting structure is fingerprint recognition biography
Sensor provides light source；The luminescence band of the organic light-emitting structure is λ 2,2≤780nm of 380nm≤λ.
8. display panel according to claim 7, which is characterized in that the organic light-emitting structure includes emitting red light list
Member, green emitting unit and blue-light-emitting unit；The light that the fingerprint Identification sensor is issued in the emitting red light unit
The absorptivity of wave band corresponding to line is K1, the extinction system of the wave band corresponding to the light that the green emitting unit is issued
Number is K2, and the absorptivity of the wave band corresponding to the light that the blue-light-emitting unit is issued is K3, wherein K3 > K1,
K3 > K2.
9. display panel according to claim 8, which is characterized in that K3 > K2 > K1.
10. display panel according to claim 8, which is characterized in that the fingerprint Identification sensor includes amorphous silicon.
11. a kind of preparation method of display panel, which is characterized in that including：
First substrate is formed on the rigid substrate, and forms organic light-emitting structure on the first substrate, is had to be formed
The display module of the rigid substrates, wherein the first substrate is K, K < 5x10 in the absorptivity of wave band λ 1-4；
The display module with rigid substrates is placed on microscope carrier, the rigid substrates is placed far from the microscope carrier, goes
Except the rigid substrates；
Fingerprint recognition mould group is made, and the fingerprint recognition mould group is attached at the first substrate far from the organic light emission knot
The side of structure, wherein the fingerprint recognition mould group includes at least one fingerprint Identification sensor, the fingerprint Identification sensor institute
The wave band for the light that can be incuded includes the wave band λ 1,1≤780nm of 380nm≤λ.
12. the preparation method of display panel according to claim 11, which is characterized in that described to be formed on the rigid substrate
First substrate, further for：
The mixed solution of polyamic acid and N-Methyl pyrrolidone is spread evenly across on rigid substrates, wherein the polyamide
The weight percent of acid is A1, and the weight percent of the N-Methyl pyrrolidone is A2,1wt%≤A1≤30wt%,
70wt%≤A2≤99wt%；
Heat cure processing is carried out to the mixed solution of polyamic acid and N-Methyl pyrrolidone at heat curing temperature T1, makes polyamides
Polymerization reaction occurs for the mixed solution of amino acid and N-Methyl pyrrolidone, forms first substrate, wherein 300 DEG C≤T1≤500
℃。
13. the preparation method of display panel according to claim 12, which is characterized in that the first substrate with a thickness of
D1, wherein 10 μm≤D1≤15 μm.
14. a kind of display device, which is characterized in that any display panel including claims 1 to 10.
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| CN201810601597.3A CN108898073A (en) | 2018-06-12 | 2018-06-12 | Display panel and preparation method thereof and display device |
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| CN201810601597.3A CN108898073A (en) | 2018-06-12 | 2018-06-12 | Display panel and preparation method thereof and display device |
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ID=64344827
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