CN106773319B - Display device and preparation method thereof - Google Patents

Display device and preparation method thereof Download PDF

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Publication number
CN106773319B
CN106773319B CN201710055171.8A CN201710055171A CN106773319B CN 106773319 B CN106773319 B CN 106773319B CN 201710055171 A CN201710055171 A CN 201710055171A CN 106773319 B CN106773319 B CN 106773319B
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blue
layer
blue light
display device
glass substrate
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CN106773319A (en
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陈兴武
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TCL Huaxing Photoelectric Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08FMACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F122/00Homopolymers of compounds having one or more unsaturated aliphatic radicals each having only one carbon-to-carbon double bond, and at least one being terminated by a carboxyl radical and containing at least one other carboxyl radical in the molecule; Salts, anhydrides, esters, amides, imides or nitriles thereof
    • C08F122/10Esters
    • C08F122/12Esters of phenols or saturated alcohols
    • C08F122/20Esters containing oxygen in addition to the carboxy oxygen
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • GPHYSICS
    • G02OPTICS
    • G02FOPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333Constructional arrangements; Manufacturing methods
    • G02F1/1335Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336Illuminating devices
    • G02F1/133614Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Abstract

This application provides a kind of display devices, including glass substrate, blue absorption layer and backlight module;The blue absorption layer is coated on the glass substrate, and is set between the glass substrate and the backlight module, the blue light issued for absorbing the backlight module, to reduce injury of the blue light to eyes.Present invention also provides a kind of preparation methods of display device.The application by being arranged blue absorption layer in a display device, to absorb the blue light that backlight module is issued, to reduce injury of the blue light to eyes.

Description

Display device and preparation method thereof
Technical field
This application involves technical field of liquid crystal display, and in particular to a kind of display device that may filter that blue light and its preparation side Method.
Background technique
As high color gamut liquid crystal display develops, quantum dot liquid crystal display (QD LCD) is becoming increasingly popular.QD LCD It needs to carry out luminescence generated by light to QD LCD using Blue backlight system, is just able to achieve high colour gamut and shows.However Blue backlight system It include to the great blue light of human injury in the light of sending.Blue light is the high-energy light that wavelength is 380nm~480nm, can Retina is reached to penetrate crystalline lens, so that the epithelial cell of retinal pigment is become feeble and die, photaesthesia cell is caused to lack nutrient, thus Cause irreversible vision impairment.
Therefore, how effective filter blue light, protection eyes be display screen industry one of project urgently to be resolved.
Summary of the invention
For above problem, the purpose of the application is to provide a kind of display device and preparation method thereof, by showing Blue absorption layer is set on substrate, absorbs the blue light that backlight module is issued, to reduce the injury to eyes.
In order to solve the problems, such as background technique, this application provides a kind of display devices, including glass substrate, indigo plant Light absorbing layer and backlight module;The blue absorption layer is coated on the glass substrate, and is set to the glass substrate and institute It states between backlight module, the blue light issued for absorbing the backlight module, to reduce injury of the blue light to eyes.
The blue absorption layer includes azo dyes and polymerisable monomer, and the azo dyes are used to absorb blue light, Its mass percent is 10~40%, and for making azo dyes cohesion film forming, mass percent is the polymerisable monomer 10~40%.
The general formula of the azo dyes is
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, can be OH, CnH2n+1、 OCnH2n+1、CnH2n、OCnH2n, the groups such as COOH it is one such or a variety of etc.;R2Can for substituted or unsubstituted alkyl or Hydroxyl or azo molecules group, wherein alkyl or hydroxyl can be OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, the bases such as COOH It rolls into a ball one such or a variety of etc.;R6、R7It can be SO3Na or other groups.
The display device further includes liquid crystal layer and lower polarizing film;The liquid crystal layer be set to the blue absorption layer with it is described Between backlight module, the lower polarizing film be set between the liquid crystal layer and the backlight module, and with the blue absorption layer Relatively;The azo dyes are sulfonic acid ice color, so that the blue absorption layer carries out orientation under ultraviolet light;Institute Lower polarizing film is stated to be matched with the blue absorption layer to carry out orientation to the liquid crystal layer.
The display device further includes quantum dot three primary colours array layer, and the quantum dot three primary colours array layer is set to the glass Between glass substrate and the backlight module;The backlight module is blue light backlight module, for issuing blue excitation light, so that institute It is colored to state the display of quantum dot three primary colours array layer.
The quantum dot three primary colours array layer is coated on the blue absorption layer, and deviates from the one of the glass substrate Side, the quantum dot three primary colours array layer are to form red, green, blue chromatic filter layer, the quanta point material by quanta point material One or more mixtures including CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
The quantum dot three primary colours array layer, which is set to, to be coated on the blue absorption layer, and is set to the blue light backlight mould Between group and the blue absorption layer, the quantum dot three primary colours array layer is to form red, green, blue liquid crystal by quanta point material Layer, the quanta point material includes one or more mixtures of CdX, PbX, ZnX, HgX, GaX, InX, and wherein X is S, Se Or Te.
Present invention also provides a kind of preparation methods of display device, including
Take the azo dyes that mass percent is 10~40% and the polymerisable monomer that mass percent is 10~40% It is uniformly mixed, and is dissolved in organic solvent, blue light absorption mixed liquor is made;Wherein, the general formula of the azo dyes is
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, can be OH, CnH2n+1、 OCnH2n+1、CnH2n、OCnH2n, the groups such as COOH it is one such or a variety of etc.;R2Can for substituted or unsubstituted alkyl or Hydroxyl or azo molecules group, wherein alkyl or hydroxyl can be OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, the bases such as COOH It rolls into a ball one such or a variety of etc.;R6、R7It can be SO3Na or other groups;
It the use of wavelength is 300 by blue light absorption mixed liquor coating on the glass substrate blue light absorption coating is made Blue light absorption coating surface described in the ultraviolet light of~400nm, then the glass substrate is heat-treated, must be made blue Light absorbing layer;And
It combines the glass substrate, the blue absorption layer, with liquid crystal layer, TFT substrate, backlight module display is made Device.
Wherein, prepare red, green, blue chromatic filter layer using quanta point material, the quanta point material include CdX, PbX, One or more mixtures of ZnX, HgX, GaX, InX, wherein X is S, Se or Te;" blue light absorption is mixed in step Liquid coating is on the glass substrate to be made blue light absorption coating " before, the red, green, blue chromatic filter layer is coated on the glass On glass substrate.
Wherein, in step " by blue light absorption mixed liquor coating on the glass substrate blue light absorption coating is made " Afterwards, chromatic filter layer is coated on the blue light absorption coating;The liquid crystal layer is the red, green, blue prepared with quanta point material Liquid crystal layer, the quanta point material include one or more mixtures of CdX, PbX, ZnX, HgX, GaX, InX, and wherein X is S, Se or Te.
The embodiment of the present application is for backlight module, especially blue light backlight module in display device, and the blue light of sending is to eye Eyeball injures larger problem, and blue absorption layer is arranged in proposition on the glass substrate, to absorb the blue light of backlight module sending, In, blue absorption layer includes azo dyes, and molecular structure is
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, can be OH, CnH2n+1、 OCnH2n+1、CnH2n、OCnH2n, the groups such as COOH it is one such or a variety of etc.;R2Can for substituted or unsubstituted alkyl or Hydroxyl or azo molecules group, wherein alkyl or hydroxyl can be OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, the bases such as COOH It rolls into a ball one such or a variety of etc.;R6、R7It can be SO3Na or other groups.The azo dyes of the molecular structure can be effective Ground absorbing wavelength is the blue light of 400~480nm, to significantly reduce injury of the display device to human eye.Using sulfonic acid idol Blue absorption layer made of nitrogen fuel is set between chromatic filter layer and liquid crystal layer, can be used as liquid crystal alignment layer, so that display dress It sets while effectively absorbing blue light, reduces the preparation section of both alignment layers, saved manufacturing cost.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application, below will be to needed in the embodiment attached Figure is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for this field For those of ordinary skill, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram for the display device that the first embodiment of the application provides;
Fig. 2 is trap curve graph of the ice color that provides of the first embodiment of the application for different wave length;
Fig. 3 is the structural schematic diagram for the display device that second of embodiment of the application provides;
Fig. 4 is the preparation method schematic diagram for the display device that the first embodiment of the application provides;
Fig. 5 is the structural schematic diagram for the display device that the third embodiment of the application provides;
Fig. 6 is the preparation method schematic diagram for the display device that the third embodiment of the application provides.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, the technical solution of the embodiment of the present application is carried out clear, complete Ground description.
A kind of display device provided by the embodiments of the present application, the application field of the display device include but is not limited to liquid crystal TV, mobile phone, personal digital assistant (PDA), digital camera, computer screen or laptop screen etc..The application Embodiment is illustrated the application by taking liquid crystal display as an example.
Referring to Fig. 1, Fig. 1 is a kind of display device 10 provided by the embodiments of the present application, including display base plate 11, TFT be (thin Film transistor) substrate 13, backlight module 14.The display base plate 11 includes glass substrate 110 and blue absorption layer 111.It is described Blue absorption layer 111 is coated on the glass substrate 110, and be set to the glass substrate 110 and the backlight module 14 it Between, the blue light issued for absorbing the backlight module 14, to reduce injury of the blue light to eyes.
In a kind of embodiment, display device 10 is quantum dot liquid crystal display, and the quantum dot liquid crystal display includes Quantum dot three primary colours array layer, the quantum dot three primary colours array layer form three primary colours pixel battle array by various sizes of quantum dot It arranges (such as rgb pixels dot matrix).The backlight module 14 is blue light backlight module, and the blue light backlight module 14 includes LED light Source 140, the LED light source 140 is for providing blue excitation light, i.e. blue light.TFT substrate 13 is used to adjust going out for blue excitation light Penetrate light intensity.The quantum dot three primary colours array layer makes display device display colored under the action of blue excitation light.The quantum Point three primary colours array layer is set between display base plate 11 and blue light backlight module 14, can be the forming amount in conjunction with chromatic filter layer Son point chromatic filter layer, perhaps forms quantum dot liquid crystal layer in conjunction with liquid crystal layer or forms quantum in conjunction with other structures layer Point three primary colours pel array layer, under blue excitation light action, realizing that display device colour is shown.
The blue excitation light that blue light backlight module is issued is the high-energy light that wave-length coverage is 380~480nm, and blue light can Cornea and the through retina of crystalline lens and macular area are penetrated, so that eyes is generated a large amount of free radicals, macular area is caused to be degenerated, thus Cause damage of fundus.For this problem, display base plate 11 provided in this embodiment includes glass substrate 110 and is coated on described Blue absorption layer 111 on glass substrate 110, the blue absorption layer 111 are issued for absorbing the blue light backlight module 14 Blue light, to reduce injury of the blue light to human eye.
Wherein, the blue absorption layer 111 includes azo dyes.Azo dyes are a kind of with excellent photo orientated With the material of thermal stability.The basic structure of ice color is A-N=N-B, wherein A and B represents different molecular structures. It, can be in biggish light absorption model according to the difference of the number for the azo group being embedded into ice color molecule and the structure of A, B Enclose the interior maximum absorption wavelength for adjusting ice color.The application uses general structure for the ice color conduct of (1) and/or (2) Blue absorption layer.
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, can be OH, CnH2n+1、 OCnH2n+1、CnH2n、OCnH2n, the groups such as COOH it is one such or a variety of etc.;R2Can for substituted or unsubstituted alkyl or Hydroxyl or azo molecules group, wherein alkyl or hydroxyl can be OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, the bases such as COOH It rolls into a ball one such or a variety of etc.;R6、R7It can be SO3Na or other groups.Referring to Fig. 2, Fig. 2 is general structure (2) Trap of the ice color for different wave length.As shown in Fig. 2, the ice color of the general formula is for 400~480nm wavelength Light has biggish trap, i.e., the ice color of the described general formula can absorb the blue light of a length of 400~480nm of reflection,many.With this The film layer of the ice color preparation of class general formula also can absorb the blue light of 400~480nm, so as to intercept part from backlight module The blue light of sending reduces injury of the display device to human eye.
The blue light that the embodiment of the present application is issued for blue light backlight module in the display device problem larger to eye injury, It proposes and blue absorption layer is set in display base plate, blue absorption layer is set to glass substrate and quantum dot three primary colours array layer Between, it not only will not influence the colored display of display device, moreover, blue absorption layer includes azo dyes, molecular structure For general formula (1) and/or (2), the wavelength that such azo dyes can effectively absorb the sending of blue light backlight module is 400~480nm Blue light protect eye health to effectively prevent injury of the blue light to human eye.
The first embodiment:
The embodiment of the present application explains present invention content by taking quantum dot liquid crystal display (QD LCD) as an example It states.
Referring to Fig. 1, Fig. 1 is the structural schematic diagram for the display device 10 that the first embodiment of the application provides.The packet Include display base plate 11, quantum dot three primary colours array layer, liquid crystal layer 12, TFT (thin film transistor (TFT)) substrate 13 and blue light backlight module 14.Wherein, display base plate 11 includes glass substrate 110, coated on the blue absorption layer 111 and coloured silk on the glass substrate 110 Color filtering optical layer 112, chromatic filter layer 112 are coated on blue absorption layer 111, and deviate from the side of the glass substrate 110, institute Quantum dot three primary colours array layer is stated to be combined to form quantum stippling color filtering optical layer with chromatic filter layer 112.
The quantum dot chromatic filter layer mainly forms red-green-blue pixel array by quanta point material, by using Quanta point material and Blue backlight are arranged in pairs or groups, and realize that the red, green, blue of quantum dot chromatic filter layer, white sub-pixel region issue respectively Red, green, blue, white light.Quantum dot (Quantum Dots, QD), is made of nano particle of the partial size between 1~20nm.By In electrons and holes by quantum confinement, the continuous band structure of QD can emit by discrete independent level structure, therefore after being excited Fluorescence.The luminescent spectrum of QD is mainly controlled by the particle size of QD, therefore can realize transmitting by changing the partial size of QD The adjusting of spectrum.Meanwhile QD light conversion efficiency is very high, and the utilization rate of light can be improved, the emission spectrum half-wave of QD is wide very narrow, temperature It is good to spend stability.Using quantum dot as luminescent material compared with pigment or fluorescent powder, NTSC (National Television Selection) Colour gamut can be about higher by 30%~70% than liquid crystal display panel NTSC currently on the market greater than 100%.The quanta point material can be with Are as follows: the mixture of CdX, PbX, ZnX, HgX, GaX, InX (X=S, Se, Te) and any of the above material.With traditional by colourama The chromatic filter layer of resistance composition is compared, and the quantum dot chromatic filter layer can widen colour gamut, improves the utilization rate of light, is promoted aobvious Show brightness and transmitance.
The display device that the first embodiment of the application provides passes through setting quantum stippling color filtering optical layer and blue light backlight mould Group can widen colour gamut, improve the utilization rate of light, promote display brightness and transmitance;It is inhaled in addition, blue light is arranged in display base plate Layer is received, blue absorption layer includes that molecular structure is general formula (1) and/or (2), the indigo plant that absorbable part is issued from display device Light, to reduce injury of the blue light to eyes.
Referring to Fig. 3, the first embodiment of the application provides a kind of preparation method of display device, including
S101, azo dyes and the mass percent for taking mass percent to be 10~40% be 10~40% it is polymerizable Monomer is uniformly mixed, and is dissolved in organic solvent, blue absorption layer mixed liquor is made.Wherein, mixing and course of dissolution can To be realized by mechanical stirring.The azo dyes are for absorbing blue light.
In a kind of embodiment, the molecular structural formula of the azo dyes are as follows:
Polymerisable monomer is for agglomerating azo dyes, in order to form a film.The polymerisable monomer include acrylate, Acrylate derivative, methacrylate, methacrylate derivative, styrene, styrene derivative and epoxy resin One of or a variety of combinations.
In a kind of embodiment, the molecular structural formula of the polymerisable monomer are as follows:
The organic solvent can be methanol, second for being well-dispersed in azo dyes molecule in polymerisable monomer Alcohol, n,N-Dimethylformamide (DMF), dimethyl sulfoxide, acetonitrile, sulfolane, acetone, dimethyl acetamide, hexamethyl phosphinylidyne At least one of amine.
S102, the mixed liquor is coated in the substrate surface, the ultraviolet light for the use of wavelength being 300~400nm The substrate surface is heat-treated the substrate, to obtain blue absorption layer.Specifically, by above-mentioned blue absorption layer Mixed liquor is formed a film by modes such as vapor deposition or spin coatings coated on the substrate surface, and film thickness can be 50~300nm;Preferably, Above-mentioned mixed liquor is coated on the substrate surface by way of vapor deposition, so that the thickness of film forming is more uniform.Before coating may be used Ultraviolet initiator is added in the blue absorption layer mixed liquor, the use of wavelength is 300~400nm (preferably 365nm) Substrate surface described in ultraviolet light, so that the coat precuring on the substrate, then the substrate is put into heating furnace Heat treatment, so that the coat on the substrate sufficiently solidifies, to obtain blue absorption layer.Then, it is applied on blue absorption layer Cover quantum dot chromatic filter layer and cylindrical spacer (Photo spacer, PS), wherein PS is used to support box thickness.The quantum Point chromatic filter layer includes the red, green, blue chromatic filter layer prepared by quanta point material, for colored display.Red, green, blue is color Color filtering optical layer is mainly made of various sizes of quantum dot and photoresist, and red filter layer is by photic red-emitting quantum point and light Photoresist composition, green color filter are made of photic green emitting quantum dot and photoresist, and blue color filter layer is by photic blue-light-emitting Quantum dot and photoresist composition.Photoresist can be positive photoresist or negative photoresist, can by epoxy resin, acrylate, The composition such as dispersing agent, photoinitiator and solvent.Quanta point material can be with are as follows: CdX, PbX, ZnX, HgX, GaX, InX (X=S, Se, Te) and the mixture of any of the above material, quanta point material concentration can be 0.01%~3%.
S103, it combines the display base plate with liquid crystal layer, TFT substrate, blue light backlight module, display device is made.
Second of embodiment:
Referring to Fig. 4, Fig. 4 is the structural schematic diagram for the display device 10 that second of embodiment of the application provides.The packet Include display base plate 11, quantum dot three primary colours array layer, liquid crystal layer 12, TFT (thin film transistor (TFT)) substrate 13 and blue light backlight module 14.The liquid crystal layer 12 is set between the blue light backlight module 14 and the display base plate 11.The liquid crystal layer 12 can wrap Include blue phase liquid crystal.The quantum dot three primary colours array layer is combined to form quantum dot liquid crystal layer with liquid crystal layer 12.
The quantum dot liquid crystal layer 12 is by red quantum dot liquid crystal layer, green quantum dot liquid crystal layer, blue quantum dot liquid crystal The three primary colours array of layer composition.Quanta point material can be with are as follows: one or more mixing of CdX, PbX, ZnX, HgX, GaX, InX Object, wherein X is S, Se or Te.12 blue light of the quantum dot liquid crystal layer excitation is lower to shine, and is not necessarily to chromatic filter layer, can be realized aobvious Showing device colour is shown.Compared with traditional liquid crystal layer, the quantum dot liquid crystal layer can widen colour gamut, improve the utilization of light Rate promotes display brightness and transmitance.
The display device that second of embodiment of the application provides passes through setting quantum dot liquid crystal layer and blue light backlight module, energy Widen colour gamut, improve the utilization rate of light, promotes display brightness and transmitance;Blue absorption layer, blue light are set in display base plate Absorbed layer includes that molecular structure is general formula (1) and/or (2), the blue light that absorbable part is issued from display device, to reduce indigo plant Injury of the light to eyes;Quantum dot liquid crystal layer is combined with liquid crystal layer, without preparing chromatic filter layer, can be realized colored aobvious Show, reduce the preparation process of display device, saves manufacturing cost.
Present invention also provides the preparation methods for the display device that second of embodiment provides, and provide with the first embodiment Display device preparation method it is similar, difference is: do not include in S102 on blue absorption layer coat quantum stippling color filter Photosphere, and liquid crystal layer is the quantum dot liquid crystal layer prepared by quanta point material.
The quantum dot liquid crystal layer includes the red, green, blue quantum dot liquid crystal layer prepared by quanta point material, for colored aobvious Show.Red, green, blue quantum dot liquid crystal layer mainly by various sizes of quantum dot and blue phase liquid crystal molecular composition, red filter layer by Photic red-emitting quantum point and blue phase liquid crystal molecular composition, green color filter is by photic green emitting quantum dot and blue phase liquid crystal Molecular composition, blue color filter layer is by photic blue-light-emitting quantum dot and blue phase liquid crystal molecular composition.Quanta point material can be One or more mixtures of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
The third embodiment:
Referring to Fig. 5, the present embodiment is by taking liquid crystal display as an example, but it is not limited to liquid crystal display.
This application provides a kind of display device 10, including display base plate 11, backlight module 14 and set between the two Liquid crystal layer 12, lower polarizing film 113, TFT substrate 13.The display base plate 11 is including glass substrate 110 and is set to the glass base Chromatic filter layer 112 on plate 110.The display base plate 11 further includes blue absorption layer 111, and the blue absorption layer 111 applies It is overlying on the chromatic filter layer 112, and is set between the chromatic filter layer 112 and the liquid crystal layer 12, for absorbing The blue light of the sending of backlight module 14 is stated, to reduce injury of the blue light to eyes.The lower polarizing film 113 is set to the liquid crystal layer 12 Between the backlight module 14, and it is opposite with the blue absorption layer 111.Wherein, the blue absorption layer 111 includes azo Class dyestuff, for absorbing blue light.
Preferably, the azo dyes are sulfonic acid azo dyes, and molecular structural formula can be with are as follows:
In the present embodiment, the blue absorption layer 111 is set between the chromatic filter layer 112 and the liquid crystal layer 12, Sulfonic acid azo dyes make the blue absorption layer 111 carry out orientation under action of ultraviolet light, so that the blue absorption layer 111 match with lower polarizing film 113 to carry out orientation to the liquid crystal layer.
The third embodiment of the application is proposed is arranged blue absorption layer in display base plate, wherein blue absorption layer packet Include sulfonic acid azo dyes, on the one hand, the blue light that wavelength is 400~480nm can be effectively absorbed, to significantly reduce aobvious Injury of the showing device to human eye;On the other hand, sulfonic acid azo dyes can carry out orientation, blue absorption layer under action of ultraviolet light Between chromatic filter layer and liquid crystal layer, matching with lower polarizing film can be used as liquid crystal alignment layer, so that display device is having While effect absorbs blue light, reduces the preparation section of both alignment layers, saved manufacturing cost.
Referring to Fig. 6, this application provides a kind of preparation methods of display device, including
S201, chromatic filter layer is prepared on the glass substrate;Take mass percent be 10~40% azo dyes with The polymerisable monomer that mass percent is 10~40% is uniformly mixed, and is dissolved in organic solvent, blue absorption layer is made Mixed liquor.Wherein, mixing and course of dissolution can be realized by mechanical stirring.The azo dyes are for absorbing blue light.
Preferably, the azo dyes are sulfonic acid azo dyes, and molecular structural formula can be with are as follows:
Polymerisable monomer is for agglomerating azo dyes, in order to form a film.The polymerisable monomer include acrylate, Acrylate derivative, methacrylate, methacrylate derivative, styrene, styrene derivative and epoxy resin One of or a variety of combinations.
In a kind of embodiment, the molecular structural formula of the polymerisable monomer are as follows:
The organic solvent can be methanol, second for being well-dispersed in azo dyes molecule in polymerisable monomer Alcohol, n,N-Dimethylformamide (DMF), dimethyl sulfoxide, acetonitrile, sulfolane, acetone, dimethyl acetamide, hexamethyl phosphinylidyne At least one of amine.
S202, the mixed liquor is coated in the color filter surfaces so that blue absorption layer is made, is using wavelength Blue absorption layer described in the ultraviolet light of 400~500nm is to carry out orientation, the ultraviolet lighting for the use of wavelength being 300~400nm The blue light absorption layer surface is penetrated, then the glass substrate is heat-treated, to obtain display base plate.Specifically, by above-mentioned Blue absorption layer mixed liquor is formed a film by modes such as vapor deposition or spin coatings coated on the color filter surfaces, and film thickness can be 50 ~300nm.Preferably, by above-mentioned mixed liquor by spin coating mode be coated on the substrate surface, with ensure blue absorption layer at Film is more smooth.Ultraviolet initiator can be added in the blue absorption layer mixed liquor before coating, using wavelength be 400~ Blue absorption layer described in the ultraviolet light of 500nm (preferably 450nm) is 300~400nm using wavelength to carry out orientation Substrate surface described in the ultraviolet light of (preferably 365nm), so that the blue absorption layer precuring, then the substrate is put Enter in heating furnace and be heat-treated, so that the blue absorption layer on the substrate sufficiently solidifies, to obtain display base plate.
S203, it combines the display base plate with liquid crystal layer, TFT substrate, lower polarizing film, backlight module, display is made Device.
The blue light that the embodiment of the present application is issued for blue light backlight module in the display device problem larger to eye injury, It proposes and blue absorption layer is set in display base plate, wherein blue absorption layer includes azo dyes, and absorbing wavelength can root According to needing to select different azo materials to realize.The application proposes to prepare using the azo dyes of general formula (1) and/or (2) blue Light absorbing layer can effectively absorb the blue light that wavelength is 400~480nm, to significantly reduce display device to human eye Injury;The blue absorption layer as made from sulfonic acid azo dyes is set between chromatic filter layer and liquid crystal layer, with lower polarizing film phase Cooperation can be used as liquid crystal alignment layer, so that display device reduces the preparation section of both alignment layers while effectively absorbing blue light, Manufacturing cost is saved.
Although the preferred embodiment is not to limit in conclusion the application has been disclosed in a preferred embodiment above The application, those of ordinary skill in the art are not departing from spirit and scope, can make various changes and profit Decorations, therefore the protection scope of the application subjects to the scope of the claims.
The above is the preferred embodiment of the application, it is noted that for those skilled in the art For, under the premise of not departing from the application principle, several improvements and modifications can also be made, these improvements and modifications are also considered as The protection scope of the application.

Claims (9)

1. a kind of display device, which is characterized in that including glass substrate, blue absorption layer and backlight module;The blue light absorption Layer is coated on the glass substrate, and is set between the glass substrate and the backlight module, for absorbing the backlight The blue light that mould group issues, to reduce injury of the blue light to eyes;The blue absorption layer includes azo dyes, the azo For absorbing blue light, the general formula of the azo dyes is dyestuff
And/or
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, specially OH, CnH2n+1、OCnH2n+1、 CnH2n、OCnH2n, COOH group it is one such or a variety of;R2For substituted or unsubstituted alkyl or hydroxyl or azo molecules Group, wherein alkyl or hydroxyl are OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, COOH group it is one such or a variety of; R6、R7For SO3Na;Wherein, n is positive integer.
2. a kind of display device according to claim 1, which is characterized in that the blue absorption layer further includes polymerizable list Body, the azo dyes mass percent are 10~40%, and the polymerisable monomer forms a film for agglomerating azo dyes, Its mass percent is 10~40%.
3. a kind of display device according to claim 1, which is characterized in that the display device further includes liquid crystal layer under Polarizing film;The liquid crystal layer is set between the blue absorption layer and the backlight module, and the lower polarizing film is set to the liquid Between crystal layer and the backlight module, and it is opposite with the blue absorption layer;The azo dyes are sulfonic acid ice color, are made It obtains the blue absorption layer and carries out orientation under ultraviolet light;The lower polarizing film is matched with the blue absorption layer with right The liquid crystal layer carries out orientation.
4. a kind of display device according to claim 1, which is characterized in that the display device further includes three base of quantum dot Color array layer, the quantum dot three primary colours array layer are set between the glass substrate and the backlight module;The backlight mould Group is blue light backlight module, for issuing blue excitation light, so that quantum dot three primary colours array layer display is colored.
5. a kind of display device according to claim 4, which is characterized in that the quantum dot three primary colours array layer is coated on On the blue absorption layer, and deviate from the side of the glass substrate, the quantum dot three primary colours array layer is by quantum dot material Material composition red, green, blue chromatic filter layer, the quanta point material includes one kind or more of CdX, PbX, ZnX, HgX, GaX, InX The mixture of kind, wherein X is S, Se or Te.
6. a kind of display device according to claim 4, which is characterized in that the quantum dot three primary colours array layer, which is set to, to be applied It is overlying on the blue absorption layer, and is set between the blue light backlight module and the blue absorption layer, the quantum dot three Primary colours array layer is to form red, green, blue liquid crystal layer by quanta point material, the quanta point material include CdX, PbX, ZnX, HgX, One or more mixtures of GaX, InX, wherein X is S, Se or Te.
7. a kind of preparation method of display device, which is characterized in that including
The azo dyes that mass percent is 10~40% are taken to mix with the polymerisable monomer that mass percent is 10~40% Uniformly, it and is dissolved in organic solvent, blue light absorption mixed liquor is made;Wherein, the general formula of the azo dyes is
And/or
R1、R3、R4、R5、R8、R9For substituted or unsubstituted alkyl or hydroxyl or other, specially OH, CnH2n+1、OCnH2n+1、 CnH2n、OCnH2n, COOH group it is one such or a variety of;R2For substituted or unsubstituted alkyl or hydroxyl or azo molecules Group, wherein alkyl or hydroxyl are OH, CnH2n+1、OCnH2n+1、CnH2n、OCnH2n, COOH group it is one such or a variety of; R6、R7For SO3Na;Wherein, n is positive integer;
By the blue light absorption mixed liquor coating on the glass substrate be made blue light absorption coating, using wavelength be 300~ Blue light absorption coating surface described in the ultraviolet light of 400nm, then the glass substrate is heat-treated, it is inhaled so that blue light is made Receive layer;And
It combines the glass substrate, the blue absorption layer, with liquid crystal layer, TFT substrate, backlight module display dress is made It sets.
8. a kind of preparation method of display device according to claim 7, which is characterized in that prepared using quanta point material Red, green, blue chromatic filter layer, the quanta point material include that the one or more of CdX, PbX, ZnX, HgX, GaX, InX mix Object is closed, wherein X is S, Se or Te;
It, will be described before step " by blue light absorption mixed liquor coating on the glass substrate blue light absorption coating is made " Red, green, blue chromatic filter layer is coated on the glass substrate.
9. a kind of preparation method of display device according to claim 7, which is characterized in that in step " by the blue light Mixed liquor coating is absorbed on the glass substrate so that blue light absorption coating is made " after, it is coated on the blue light absorption coating colored Filter layer;The liquid crystal layer be with quanta point material prepare red, green, blue liquid crystal layer, the quanta point material include CdX, One or more mixtures of PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
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