WO2018137262A1 - 显示装置及其制备方法 - Google Patents

显示装置及其制备方法 Download PDF

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Publication number
WO2018137262A1
WO2018137262A1 PCT/CN2017/073708 CN2017073708W WO2018137262A1 WO 2018137262 A1 WO2018137262 A1 WO 2018137262A1 CN 2017073708 W CN2017073708 W CN 2017073708W WO 2018137262 A1 WO2018137262 A1 WO 2018137262A1
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Prior art keywords
blue
layer
blue light
display device
quantum dot
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PCT/CN2017/073708
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English (en)
French (fr)
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陈兴武
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深圳市华星光电技术有限公司
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Publication of WO2018137262A1 publication Critical patent/WO2018137262A1/zh

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F122/00—Homopolymers 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
    • C08F122/10—Esters
    • C08F122/12—Esters of phenols or saturated alcohols
    • C08F122/20—Esters containing oxygen in addition to the carboxy oxygen
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • G02F1/133614—Illuminating devices using photoluminescence, e.g. phosphors illuminated by UV or blue light

Definitions

  • the present application relates to the field of liquid crystal display technology, and in particular, to a display device capable of filtering blue light and a preparation method thereof.
  • QD LCDs quantum dot liquid crystal displays
  • QD LCDs require a blue backlight system to photoluminate the QD LCD for high color gamut display.
  • the light emitted by the blue backlight system contains blue light that is extremely harmful to the human body.
  • Blue light is a high-energy light with a wavelength of 380 nm to 480 nm, which can penetrate the lens to reach the retina, causing the epithelial cells of the retinal pigment to decay, resulting in the lack of nutrients in the light-sensitive cells, thereby causing irreversible visual impairment.
  • the technical problem to be solved by the embodiments of the present application is to provide an infrared light emitting device with strong remote control capability, and a mobile terminal applying the infrared light emitting device.
  • the present application provides a display device including a glass substrate, a blue light absorbing layer, and a backlight module.
  • the blue light absorbing layer is coated on the glass substrate and disposed on the glass.
  • the substrate and the backlight module are configured to absorb blue light emitted by the backlight module to reduce damage of the blue light to the eyes.
  • the blue light absorbing layer comprises an azo dye and a polymerizable monomer
  • the azo dye is used
  • the polymerizable monomer is used to agglomerate the azo dye into a film.
  • the mass percentage of the azo dye is 10 to 40%, and the mass percentage of the polymerizable monomer is 10 to 40%.
  • R 1 , R 3 , R 4 , R 5 , R 8 , and R 9 are a substituted or unsubstituted hydrocarbon group or a hydroxyl group or the like, and may be OH, C n H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH or the like, one or more of the groups;
  • R 2 may be a substituted or unsubstituted hydrocarbon group or a hydroxyl group or an azo molecule group, wherein the hydrocarbon group or the hydroxyl group may be OH, C n One or more of H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH, etc.; and
  • R 6 and R 7 may be SO 3 Na or other groups.
  • the display device further includes a liquid crystal layer and a lower polarizing plate; the liquid crystal layer is disposed between the blue light absorbing layer and the backlight module, and the lower polarizing plate is disposed on the liquid crystal layer and the backlight Between the modules, and opposite to the blue absorbing layer; the azo dye is a sulfonic acid azo fuel, such that the blue absorbing layer is aligned under ultraviolet light; the lower polarizing plate and the blue light The absorbing layers cooperate to align the liquid crystal layer.
  • the display device further includes a quantum dot three primary color array layer, the quantum dot three primary color array layer is disposed between the glass substrate and the backlight module; and the backlight module is a blue backlight module.
  • the blue excitation light is emitted to cause the quantum dot three primary color array layer to display color.
  • the quantum dot three primary color array layer is coated on the blue light absorbing layer and faces away from the side of the glass substrate, and the quantum dot three primary color array layer is composed of a quantum dot material to form a color filter layer.
  • the quantum dot material comprises a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
  • the quantum dot three primary color array layer is disposed on the blue light absorbing layer, and is disposed between the blue light backlight module and the blue light absorbing layer, wherein the quantum dot three primary color array layer is
  • the quantum dot material constitutes a red, green, and blue liquid crystal layer.
  • the quantum dot material comprises a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
  • the application also provides a method for preparing a display device, including
  • the azo dye having a mass percentage of 10 to 40% is uniformly mixed with the polymerizable monomer having a mass percentage of 10 to 40%, and is dissolved in an organic solvent to obtain a blue light absorbing mixture;
  • the glass substrate and the blue light absorbing layer are combined with a liquid crystal layer, a TFT substrate, and a backlight module to obtain a display device.
  • R 1 , R 3 , R 4 , R 5 , R 8 , and R 9 are a substituted or unsubstituted hydrocarbon group or a hydroxyl group or the like, and may be OH, C n H 2n+1 , OC n H 2n+1 , C n H One or more of 2n , OC n H 2n , COOH and the like;
  • R 2 may be a substituted or unsubstituted hydrocarbon group or a hydroxyl group or an azo molecule group, wherein the hydrocarbon group or hydroxyl group may be OH, C n One or more of H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH, etc.; and
  • R 6 and R 7 may be SO 3 Na or other groups.
  • the red, green and blue color filter layers are prepared using a quantum dot material, the quantum dot material comprising a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te;
  • the red, green, and blue color filter layers are coated on the glass substrate before the step of "coating the blue light absorbing mixture on a glass substrate to produce a blue light absorbing coating.”
  • a color filter layer is coated on the blue absorbing coating for displaying color.
  • the liquid crystal layer is a red, green and blue liquid crystal layer prepared by using a quantum dot material
  • the quantum dot material comprises a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
  • the azo dye is a sulfonic acid azo fuel, so that the blue light absorbing layer can be aligned under ultraviolet light irradiation.
  • the surface of the blue absorbing coating layer is irradiated with ultraviolet light having a wavelength of 400 to 500 nm for alignment.
  • the embodiment of the present application is directed to a backlight module, particularly a blue backlight module, in which a blue light emitted by a backlight device is relatively harmful to the eyes, and a blue light absorbing layer is disposed on the glass substrate to absorb blue light emitted by the backlight module.
  • the blue absorbing layer includes an azo dye, and its molecular structure is
  • R 1 , R 3 , R 4 , R 5 , R 8 , and R 9 are a substituted or unsubstituted hydrocarbon group or a hydroxyl group or the like, and may be OH, C n H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH or the like, one or more of the groups;
  • R 2 may be a substituted or unsubstituted hydrocarbon group or a hydroxyl group or an azo molecule group, wherein the hydrocarbon group or the hydroxyl group may be OH, C n One or more of H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH, etc.; and
  • R 6 and R 7 may be SO 3 Na or other groups.
  • the azo dye of the molecular structure can effectively absorb blue light having a wavelength of 400 to 480 nm, thereby greatly reducing the damage of the display device to the human eye.
  • the blue light absorbing layer made of sulfonic acid azo fuel is disposed between the color filter layer and the liquid crystal layer, and can be used as a liquid crystal alignment layer, so that the display device can effectively absorb blue light and reduce the preparation process of the alignment layer, thereby saving manufacturing cost.
  • FIG. 1 is a schematic structural diagram of a display device according to a first embodiment of the present application.
  • FIG. 2 is a graph showing the absorbance of azo fuels for different wavelengths according to the first embodiment of the present application
  • FIG. 3 is a schematic structural diagram of a display device according to a second embodiment of the present application.
  • FIG. 4 is a schematic diagram of a method of fabricating a display device according to a first embodiment of the present application
  • FIG. 5 is a schematic structural diagram of a display device according to a third embodiment of the present application.
  • FIG. 6 is a schematic diagram of a method of fabricating a display device according to a third embodiment of the present application.
  • a display device provided by an embodiment of the present application includes, but is not limited to, a liquid crystal television, a mobile phone, a personal digital assistant (PDA), a digital camera, a computer screen, or a notebook computer screen.
  • PDA personal digital assistant
  • the embodiment of the present application takes a liquid crystal display as an example to explain the present application.
  • FIG. 1 is a display device 10 according to an embodiment of the present disclosure, which includes a display substrate 11 , a TFT (thin film transistor) substrate 13 , and a backlight module 14 .
  • the display substrate 11 includes a glass substrate 110 and a blue light absorbing layer 111.
  • the blue light absorbing layer 111 is coated on the glass substrate 110 and disposed between the glass substrate 110 and the backlight module 14 for absorbing blue light emitted by the backlight module 14 to reduce blue light. Damage to the eyes.
  • the display device 10 is a quantum dot liquid crystal display
  • the quantum dot liquid crystal display comprises a quantum dot three primary color array layer, wherein the quantum dot three primary color array layer is a three primary color pixel array composed of quantum dots of different sizes (such as red, green and blue pixel lattice).
  • the backlight module 14 is a blue backlight module, and the blue backlight module 14 includes an LED light source 140 for providing blue excitation light, that is, blue light.
  • the TFT substrate 13 is for adjusting the outgoing light intensity of the blue excitation light.
  • the quantum dot three primary color array layer causes the display device to display color under the action of blue excitation light.
  • the quantum dot three primary color array layer is disposed between the display substrate 11 and the blue backlight module 14 , and may be combined with the color filter layer to form a quantum dot color filter layer, or combined with the liquid crystal layer to form a quantum dot liquid crystal layer, or Combining with other structural layers to form a quantum dot three primary color pixel array layer for realizing color display of the display device under the action of blue excitation light.
  • the blue excitation light emitted by the blue backlight module is high-energy light with a wavelength range of 380-480 nm.
  • the blue light can penetrate the cornea and the lens to reach the retina and the macular area, causing a large amount of free radicals in the eye, causing degradation of the macular area. Causes damage to the fundus.
  • the display substrate 11 of the present embodiment includes a glass substrate 110 and a blue light absorbing layer 111 coated on the glass substrate 110.
  • the blue light absorbing layer 111 is used to absorb the blue light backlight module 14 Blu-ray to reduce the damage of blue light to the human eye.
  • the blue light absorbing layer 111 includes an azo dye.
  • An azo dye is a material with excellent photo-alignment and thermal stability.
  • the present application employs an azo fuel of the formula (1) and/or (2) as a blue light absorbing layer.
  • R 1 , R 3 , R 4 , R 5 , R 8 , and R 9 are a substituted or unsubstituted hydrocarbon group or a hydroxyl group or the like, and may be OH, C n H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH or the like, one or more of the groups;
  • R 2 may be a substituted or unsubstituted hydrocarbon group or a hydroxyl group or an azo molecule group, wherein the hydrocarbon group or the hydroxyl group may be OH, C n One or more of H 2n+1 , OC n H 2n+1 , C n H 2n , OC n H 2n , COOH, etc.; and
  • R 6 and R 7 may be SO 3 Na or other groups.
  • FIG. 2 is the absorbance of the azo fuel of the structural formula (2) for different wavelengths.
  • the azo fuel of the above formula has a large absorption for light having a wavelength of 400 to 480 nm, that is, the azo fuel of the above formula can absorb more blue light having a wavelength of 400 to 480 nm.
  • the film prepared by the azo fuel of the general formula can also absorb blue light of 400 to 480 nm, thereby intercepting part of the blue light emitted from the backlight module, and reducing the damage of the display device to the human eye.
  • the blue light emitted by the blue backlight module in the display device is harmful to the eye
  • the color absorption layer of the display device is not affected, and the blue light absorbing layer includes an azo dye having a molecular structure of the general formula (1) and/or (2), and the azo dye can effectively absorb the blue backlight.
  • the module emits blue light with a wavelength of 400 to 480 nm, thereby effectively preventing blue light from harming the human eye and protecting eye health.
  • the embodiment of the present application exemplifies the invention of the present application by taking a quantum dot liquid crystal display (QD LCD) as an example.
  • QD LCD quantum dot liquid crystal display
  • FIG. 1 is a schematic structural diagram of a display device 10 according to a first embodiment of the present application.
  • the display substrate 11 includes a glass substrate 110, a blue light absorbing layer 111 coated on the glass substrate 110, and a color filter layer 112.
  • the color filter layer 112 is coated on the blue light absorbing layer 111 and faces away from the glass.
  • the quantum dot three primary color array layer is combined with the color filter layer 112 to form a quantum dot color filter layer.
  • the quantum dot color filter layer mainly comprises a red, green and blue primary color pixel array composed of quantum dot materials, and the red, green, blue and white sub-pixel regions of the quantum dot color filter layer are realized by using a quantum dot material and a blue backlight. Red, green, blue, and white light are emitted separately.
  • Quantum Dots consist of nanoparticles with a particle size between 1 and 20 nm. Since electrons and holes are quantum confined, QD is continuous The band structure is separated by an independent level structure, so that it can emit fluorescence after being excited.
  • the luminescence spectrum of QD is mainly controlled by the particle size of QD, so the adjustment of the emission spectrum can be achieved by changing the particle size of QD.
  • the QD light conversion efficiency is very high, which can improve the utilization of light.
  • the half-wave width of the emission spectrum of QD is narrow and the temperature stability is good.
  • the NTSC National Television Standard
  • the quantum dot color filter layer can widen the color gamut, improve the utilization of light, and improve display brightness and transmittance.
  • the display device provided by the first embodiment of the present invention can widen the color gamut, improve the light utilization rate, and improve the display brightness and transmittance by providing a quantum dot color filter layer and a blue backlight module. Further, the display substrate is displayed on the display substrate. A blue light absorbing layer is disposed, and the blue light absorbing layer comprises a molecular structure of the general formula (1) and/or (2), and the blue light emitted from the display device can be absorbed to reduce the damage of the blue light to the eyes.
  • a first embodiment of the present application provides a method for preparing a display device, including
  • the azo dye having a mass percentage of 10 to 40% is uniformly mixed with the polymerizable monomer having a mass percentage of 10 to 40%, and dissolved in an organic solvent to obtain a blue light absorbing layer mixture.
  • the mixing and dissolving process can be achieved by mechanical stirring.
  • the azo dye is used to absorb blue light.
  • the azo dye may be of the formula (1) and/or (2).
  • the molecular structure of the azo dye is:
  • the polymerizable monomer is used to agglomerate the azo dye to facilitate film formation.
  • the polymerizable monomer includes a combination of one or more of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, a styrene, a styrene derivative, and an epoxy resin.
  • the molecular structure of the polymerizable monomer is:
  • the organic solvent is used for sufficiently dispersing the azo dye molecules in the polymerizable monomer, and may be methanol, ethanol, N,N-dimethylformamide (DMF), dimethyl sulfoxide, acetonitrile or sulfolane. At least one of acetone, dimethylacetamide, and hexamethylphosphoramide.
  • the blue light absorbing layer mixture is applied to the surface of the substrate by vapor deposition or spin coating to form a film, and the film thickness may be 50 to 300 nm; preferably, the mixture is coated by evaporation. On the surface of the substrate, the thickness of the film formation is made more uniform.
  • An ultraviolet photoinitiator may be added to the blue light absorbing layer mixture before coating, and the surface of the substrate may be irradiated with ultraviolet light having a wavelength of 300 to 400 nm (preferably 365 nm) to coat the substrate.
  • the substrate is placed in a heating furnace for heat treatment to sufficiently cure the coating layer on the substrate to obtain a blue light absorbing layer.
  • a quantum dot color filter layer and a column spacer (PS spacer) are coated on the blue light absorbing layer, wherein the PS is used to support the cell thickness.
  • the quantum dot color filter layer comprises red, green, and blue color filter layers prepared from quantum dot materials for color display.
  • the red, green and blue color filter layers are mainly composed of quantum dots and photoresists of different sizes
  • the red filter layer is composed of photo-induced red light-emitting quantum dots and photoresist
  • the green filter layer is composed of photo-induced green light-emitting quantum dots.
  • the photoresist composition is composed of photo-induced blue light-emitting quantum dots and photoresist.
  • the photoresist may be a positive photoresist or a negative photoresist, and may be composed of an epoxy resin, an acrylate, a dispersant, a photoinitiator, a solvent, and the like.
  • FIG. 4 is a schematic structural diagram of a display device 10 according to a second embodiment of the present application.
  • the display substrate 11 the quantum dot three primary color array layer, the liquid crystal layer 12 , the TFT (thin film transistor) substrate 13 , and the blue backlight module 14 .
  • the liquid crystal layer 12 is disposed between the blue backlight module 14 and the display substrate 11 .
  • the liquid crystal layer 12 may include a blue phase liquid crystal.
  • the quantum dot three primary color array layer is combined with the liquid crystal layer 12 to form a quantum dot liquid crystal layer.
  • the quantum dot liquid crystal layer 12 is a three primary color array composed of a red quantum dot liquid crystal layer, a green quantum dot liquid crystal layer, and a blue quantum dot liquid crystal layer.
  • the quantum dot material may be a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
  • the quantum dot liquid crystal layer 12 emits light under blue light excitation, and the color display layer of the display device can be realized without a color filter layer. Compared with the conventional liquid crystal layer, the quantum dot liquid crystal layer can widen the color gamut, improve the utilization of light, and improve display brightness and transmittance.
  • the display device provided by the second embodiment of the present invention can widen the color gamut by increasing the color gamut by using the quantum dot liquid crystal layer and the blue light backlight module, thereby improving the light utilization rate and the transmittance; and setting the blue light absorption in the display substrate.
  • the layer, the blue absorbing layer comprises a molecular structure of the general formula (1) and / or (2), the absorbable portion of the blue light emitted from the display device to reduce the damage of the blue light to the eye; the quantum dot liquid crystal layer and the liquid crystal layer are combined
  • the color display can be realized without preparing a color filter layer, the preparation process of the display device is reduced, and the manufacturing cost is saved.
  • the present application also provides a method for fabricating the display device provided by the second embodiment, which is similar to the method for preparing the display device provided by the first embodiment, except that the quantum dot color coated on the blue light absorbing layer in S102 is not included.
  • a filter layer, and the liquid crystal layer is a quantum dot liquid crystal layer prepared from a quantum dot material.
  • the quantum dot liquid crystal layer comprises red, green, and blue quantum dot liquid crystal layers prepared from quantum dot materials for color display.
  • the red, green and blue quantum dot liquid crystal layers are mainly composed of quantum dots and blue phase liquid crystal molecules of different sizes, the red filter layer is composed of photoinduced red light emitting quantum dots and blue phase liquid crystal molecules, and the green filter layer is illuminated by light green light.
  • the quantum dots and the blue phase liquid crystal molecules are composed, and the blue filter layer is composed of photoluminescence blue light-emitting quantum dots and blue phase liquid crystal molecules.
  • the quantum dot material may be a mixture of one or more of CdX, PbX, ZnX, HgX, GaX, InX, wherein X is S, Se or Te.
  • the liquid crystal display is taken as an example, but is not limited to a liquid crystal display.
  • the present application provides a display device 10 including a display substrate 11 , a backlight module 14 , and a liquid crystal layer 12 , a lower polarizing plate 113 , and a TFT substrate 13 disposed therebetween.
  • the display substrate 11 includes a glass substrate 110 and a color filter layer 112 disposed on the glass substrate 110.
  • the display substrate 11 further includes a blue light absorbing layer 111.
  • the blue light absorbing layer 111 is coated on the color filter layer 112 and disposed between the color filter layer 112 and the liquid crystal layer 12.
  • the blue light emitted by the backlight module 14 is absorbed to reduce the damage of the blue light to the eyes.
  • the lower polarizing plate 113 is disposed on the liquid crystal layer 12 and
  • the backlight modules 14 are opposite to the blue light absorbing layer 111.
  • the blue light absorbing layer 111 includes an azo dye for absorbing blue light.
  • the azo dye is a sulfonic acid azo dye, and its molecular structural formula can be:
  • the blue light absorbing layer 111 is disposed between the color filter layer 112 and the liquid crystal layer 12, and the sulfonic acid azo dye causes the blue light absorbing layer 111 to be aligned under the action of ultraviolet light.
  • the blue absorbing layer 111 is caused to cooperate with the lower polarizing plate 113 to align the liquid crystal layer.
  • the third embodiment of the present application proposes to provide a blue light absorbing layer in the display substrate, wherein the blue light absorbing layer comprises a sulfonic acid azo dye, and on the one hand, can effectively absorb blue light having a wavelength of 400 to 480 nm, thereby greatly reducing
  • the display device damages the human eye; on the other hand, the sulfonic acid azo dye can be aligned under the action of ultraviolet light, and the blue light absorbing layer is disposed between the color filter layer and the liquid crystal layer, and can cooperate with the lower polarizing plate.
  • the display device can effectively absorb blue light, reduce the preparation process of the alignment layer, and save manufacturing costs.
  • the present application provides a method for preparing a display device, including
  • S201 preparing a color filter layer on a glass substrate; mixing an azo dye having a mass percentage of 10 to 40% with a polymerizable monomer having a mass percentage of 10 to 40%, and dissolving in an organic solvent to prepare A mixture of blue light absorbing layers is obtained.
  • the mixing and dissolving process can be achieved by mechanical stirring.
  • the azo dye is used to absorb blue light.
  • the azo dye is a sulfonic acid azo dye, and its molecular structural formula can be:
  • the polymerizable monomer is used to agglomerate the azo dye to facilitate film formation.
  • the polymerizable monomer includes a combination of one or more of an acrylate, an acrylate derivative, a methacrylate, a methacrylate derivative, a styrene, a styrene derivative, and an epoxy resin.
  • the molecular structure of the polymerizable monomer is:
  • the organic solvent is used for sufficiently dispersing the azo dye molecules in the polymerizable monomer, and may be methanol, ethanol, N,N-dimethylformamide (DMF), dimethyl sulfoxide, acetonitrile or sulfolane. At least one of acetone, dimethylacetamide, and hexamethylphosphoramide.
  • the blue light absorbing layer mixture is applied to the surface of the color filter layer by vapor deposition or spin coating to form a film having a film thickness of 50 to 300 nm.
  • the above mixture is applied to the surface of the substrate by spin coating to ensure that the blue absorbing layer is formed into a flat film.
  • An ultraviolet photoinitiator may be added to the blue light absorbing layer mixture before coating, and the blue light absorbing layer may be irradiated with ultraviolet light having a wavelength of 400 to 500 nm (preferably 450 nm) for alignment, using a wavelength of 300 to 400 nm.
  • Ultraviolet light (preferably 365 nm) is irradiated onto the surface of the substrate to pre-cure the blue absorbing layer, and the substrate is placed in a heating furnace for heat treatment to sufficiently cure the blue absorbing layer on the substrate.
  • a display substrate is obtained.
  • the embodiment of the present application is directed to the problem that the blue light emitted by the blue backlight module in the display device is harmful to the eyes, and a blue light absorbing layer is disposed in the display substrate, wherein the blue light absorbing layer includes an azo dye, and the absorption wavelength thereof can be Need to choose different azo materials to achieve.
  • the present application proposes to prepare a blue light absorbing layer by using an azo dye of the general formula (1) and/or (2), which can effectively absorb blue light having a wavelength of 400 to 480 nm, thereby greatly reducing the damage of the display device to the human eye;
  • the blue light absorbing layer prepared from the sulfonic acid azo dye is disposed between the color filter layer and the liquid crystal layer, and cooperates with the lower polarizing plate to serve as a liquid crystal alignment layer, so that the display device can effectively absorb blue light while reducing the alignment.
  • the layer preparation process saves manufacturing costs.

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Abstract

一种显示装置，包括玻璃基板、蓝光吸收层及背光模组；所述蓝光吸收层涂覆于所述玻璃基板上，且设于所述玻璃基板与所述背光模组之间，用于吸收所述背光模组发出的蓝光，以减少蓝光对眼睛的伤害。还提供了一种显示装置的制备方法。通过在显示装置中设置蓝光吸收层，以吸收背光模组所发出的蓝光，从而减少蓝光对眼睛的伤害。

Description

显示装置及其制备方法
本申请要求于2017年01月24日提交中国专利局、申请号为201710055171.8、发明名称为“显示装置及其制备方法”的中国专利申请的优先权，上述在先申请的内容以引入的方式并入本文本中。
技术领域
本申请涉及液晶显示技术领域，具体涉及一种可过滤蓝光的显示装置及其制备方法。
背景技术
随着高色域液晶显示器发展，量子点液晶显示器(QD LCD)越来越受欢迎。QD LCD需要采用蓝色背光系统对QD LCD进行光致发光，才能实现高色域显示。然而蓝色背光系统发出的光中包含有对人体伤害极大的蓝光。蓝光是波长为380nm～480nm的高能量光，其可以穿透晶状体到达视网膜，使视网膜色素的上皮细胞衰亡，导致光敏感细胞缺少养分，从而引起不可逆的视力损伤。
因此，如何有效过滤蓝光，保护眼睛是显示屏行业亟待解决的课题之一。
发明内容
本申请实施方式所要解决的技术问题在于提供一种遥控能力强的红外光发射装置，以及一种应用所述红外光发射装置的移动终端。
为了实现上述目的，本申请实施方式采用如下技术方案：
为了解决背景技术中存在的问题，本申请提供了一种显示装置，包括玻璃基板、蓝光吸收层及背光模组；所述蓝光吸收层涂覆于所述玻璃基板上，且设于所述玻璃基板与所述背光模组之间，用于吸收所述背光模组发出的蓝光，以减少蓝光对眼睛的伤害。
其中，所述蓝光吸收层包括偶氮类染料和可聚合单体，所述偶氮类染料用 于吸收蓝光，所述可聚合单体用于使偶氮类染料凝聚成膜。
其中，所述偶氮类染料的质量百分数为10～40％，所述可聚合单体的质量百分数为10～40％。
其中，所述偶氮类染料的通式为
Figure PCTCN2017073708-appb-000001
和/或
Figure PCTCN2017073708-appb-000002
R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。
其中，所述显示装置还包括液晶层和下偏振片；所述液晶层设于所述蓝光吸收层与所述背光模组之间，所述下偏振片设于所述液晶层与所述背光模组之间，且与所述蓝光吸收层相对；所述偶氮类染料为磺酸偶氮燃料，使得所述蓝光吸收层在紫外光照射下进行配向；所述下偏振片与所述蓝光吸收层相配合以对所述液晶层进行配向。
其中，所述显示装置还包括量子点三基色阵列层，所述量子点三基色阵列层设于所述玻璃基板与所述背光模组之间；所述背光模组为蓝光背光模组，用于发出蓝色激发光，以使所述量子点三基色阵列层显示彩色。
其中，所述量子点三基色阵列层涂覆于所述蓝光吸收层上，且背离所述玻璃基板的一侧，所述量子点三基色阵列层为由量子点材料组成彩色滤光层。
其中，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
其中，所述量子点三基色阵列层设于涂覆于所述蓝光吸收层上，且设于所述蓝光背光模组与所述蓝光吸收层之间，所述量子点三基色阵列层为由量子点材料组成红、绿、蓝液晶层。
其中，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
本申请还提供了一种显示装置的制备方法，包括
取质量百分比为10～40％的偶氮类染料与质量百分比为10～40％的可聚合单体混合均匀，并溶解于有机溶剂中，以制得蓝光吸收混合液；
将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层，使用波长为300～400nm的紫外光照射所述蓝光吸收涂层表面，再对所述玻璃基板进行热处理，以得制得蓝光吸收层；及
将所述玻璃基板、所述蓝光吸收层与液晶层、TFT基板、背光模组组合，以制得显示装置。
其中，所述偶氮类染料的通式为
Figure PCTCN2017073708-appb-000003
和/或
Figure PCTCN2017073708-appb-000004
R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可 以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。
其中，使用量子点材料制备红、绿、蓝彩色滤光层，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te；
在步骤“将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层”前，将所述红、绿、蓝彩色滤光层涂覆于所述玻璃基板上。
其中，在步骤“将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层”后，在所述蓝光吸收涂层上涂覆彩色滤光层，用于显示彩色。
其中，所述液晶层是用量子点材料制备的红、绿、蓝液晶层，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
其中，所述偶氮类染料为磺酸偶氮燃料，以使所述蓝光吸收层在紫外光照射下可配向。
其中，在步骤“使用波长为300～400nm的紫外光照射所述蓝光吸收涂层表面”前，使用波长为400～500nm的紫外光照射所述蓝光吸收涂层表面以进行配向。本申请实施例针对显示装置中背光模组，特别是蓝光背光模组，发出的蓝光对眼睛伤害较大的问题，提出在玻璃基板上设置蓝光吸收层，以吸收背光模组发出的蓝光，其中，蓝光吸收层包括偶氮类染料，其分子结构为
Figure PCTCN2017073708-appb-000005
和/或
Figure PCTCN2017073708-appb-000006
R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。该分子结构的偶氮类染料可有效 地吸收波长为400～480nm的蓝光，从而极大地降低了显示装置对人眼的伤害。采用磺酸偶氮燃料制成的蓝光吸收层设于彩色滤光层与液晶层之间，可作为液晶配向层，使得显示装置在有效吸收蓝光的同时，减少了配向层的制备工序，节约了制造成本。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施方式中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施方式，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以如这些附图获得其他的附图。
图1是本申请第一种实施例提供的显示装置的结构示意图；
图2为本申请第一种实施例提供的偶氮燃料对于不同波长的吸收度曲线图；
图3是本申请第二种实施例提供的显示装置的结构示意图；
图4是本申请第一种实施例提供的显示装置的制备方法示意图；
图5是本申请第三种实施例提供的显示装置的结构示意图；
图6是本申请第三种实施例提供的显示装置的制备方法示意图。
具体实施方式
下面将结合本申请实施方式中的附图，对本申请实施方式中的技术方案进行清楚、完整地描述，显然，所描述的实施方式仅仅是本申请一部分实施方式，而不是全部的实施方式。基于本申请中的实施方式，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施方式，都属于本申请保护的范围。
本申请实施例提供的一种显示装置，所述显示装置的应用领域包括但不限于液晶电视、移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕等。本申请实施例以液晶显示屏为例，对本申请进行说明。
请参阅图1，图1为本申请实施例提供的一种显示装置10，包括显示基板11、TFT(薄膜晶体管)基板13、背光模组14。所述显示基板11包括玻璃基板 110和蓝光吸收层111。所述蓝光吸收层111涂覆于所述玻璃基板110上，且设于所述玻璃基板110与所述背光模组14之间，用于吸收所述背光模组14发出的蓝光，以减少蓝光对眼睛的伤害。
一种实施方式中，显示装置10为量子点液晶显示器，所述量子点液晶显示器包括量子点三基色阵列层，所述量子点三基色阵列层是由不同尺寸的量子点组成三基色像素阵列(如红绿蓝像素点阵)。所述背光模组14为蓝光背光模组，所述蓝光背光模组14包括LED光源140，所述LED光源140用于提供蓝色激发光，即蓝光。TFT基板13用于调节蓝色激发光的出射光强。所述量子点三基色阵列层在蓝色激发光的作用下使显示装置显示彩色。所述量子点三基色阵列层设于显示基板11和蓝光背光模组14之间，可以为与彩色滤光层结合形成量子点彩色滤光层，或者与液晶层结合形成量子点液晶层，或者与其他结构层结合形成量子点三基色像素阵列层，用于在蓝色激发光作用下，实现显示装置彩色显示。
蓝光背光模组所发出的蓝色激发光是波长范围为380～480nm的高能量光，蓝光可穿透眼角膜及晶状体直达视网膜及黄斑区，使眼睛产生大量自由基，引起黄斑区退化，从而造成眼底损伤。针对这一问题，本实施例提供的显示基板11包括玻璃基板110及涂覆于所述玻璃基板110上的蓝光吸收层111，所述蓝光吸收层111用于吸收所述蓝光背光模组14发出的蓝光，以减少蓝光对人眼的伤害。
其中，所述蓝光吸收层111包括偶氮类染料。偶氮类染料是一种具有优良光控取向和热稳定性的材料。偶氮燃料的基本结构为A-N＝N-B，其中，A和B代表不同的分子结构。根据偶氮燃料分子中被嵌入的偶氮基的数目和A、B的结构的不同，可以在较大的光吸收范围内调节偶氮燃料的最大吸收波长。本申请采用结构通式为(1)和/或(2)的偶氮燃料作为蓝光吸收层。
Figure PCTCN2017073708-appb-000007
Figure PCTCN2017073708-appb-000008
R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。
请参阅图2，图2为结构通式(2)的偶氮燃料对于不同波长的吸收度。如图2所示，所述通式的偶氮燃料对于400～480nm波长的光具有较大的吸收度，即所述通式的偶氮燃料可吸收较多波长为400～480nm的蓝光。以该类通式的偶氮燃料制备的膜层也可吸收400～480nm的蓝光，从而可拦截部分从背光模组中发出的蓝光，降低显示装置对人眼的伤害。
本申请实施例针对显示装置中蓝光背光模组发出的蓝光对眼睛伤害较大的问题，提出了在显示基板中设置蓝光吸收层，将蓝光吸收层设于玻璃基板与量子点三基色阵列层之间，不但不会影响显示装置的彩色显示，而且，蓝光吸收层包括偶氮类染料，其分子结构为通式(1)和/或(2)，该类偶氮染料可有效地吸收蓝光背光模组发出的波长为400～480nm的蓝光，从而有效防止蓝光对人眼的伤害，保护眼睛健康。
第一种实施例：
本申请实施例以量子点液晶显示器(QD LCD)为例，对本申请的发明内容进行阐述。
请参阅图1，图1是本申请第一种实施例提供的显示装置10的结构示意图。所述包括显示基板11、量子点三基色阵列层、液晶层12、TFT(薄膜晶体管)基板13及蓝光背光模组14。其中，显示基板11包括玻璃基板110、涂覆于所述玻璃基板110上的蓝光吸收层111和彩色滤光层112，彩色滤光层112涂覆于蓝光吸收层111上，且背离所述玻璃基板110的一侧，所述量子点三基色阵列层与彩色滤光层112结合形成量子点彩色滤光层。
所述量子点彩色滤光层主要由量子点材料组成红绿蓝三基色像素阵列，通过采用量子点材料与蓝色背光搭配，实现量子点彩色滤光层的红、绿、蓝、白子像素区域分别发出红、绿、蓝、白光。量子点(Quantum Dots，QD)，由粒径介于1～20nm之间的纳米颗粒组成。由于电子和空穴被量子限域，QD连续的 能带结构被分立独立能级结构，因此受激后可以发射荧光。QD的发光光谱主要由QD的粒径大小来控制，因此可以通过改变QD的粒径来实现发射光谱的调节。同时，QD光转换效率很高，可以提高光的利用率，QD的发射光谱半波宽很窄，温度稳定性好。将量子点作为发光材料与颜料或者荧光粉比较，其NTSC(美国国家电视标准)色域可大于100％，比目前市场上液晶显示面板NTSC约高30％～70％。所述量子点材料可以为：CdX，PbX，ZnX，HgX，GaX，InX(X＝S、Se或Te)及以上任意材料的一种或多种的混合物。与传统的由彩色光阻组成的彩色滤光层相比，所述量子点彩色滤光层能够加宽色域，提高光的利用率，提升显示亮度和透过率。
本申请第一种实施例提供的显示装置通过设置量子点彩色滤光层和蓝光背光模组，能加宽色域，提高光的利用率，提升显示亮度和透过率；此外，在显示基板中设置蓝光吸收层，蓝光吸收层包括分子结构为通式(1)和/或(2)，可吸收部分从显示装置中发出的蓝光，以减少蓝光对眼睛的伤害。
请参阅图3，本申请第一种实施例提供了一种显示装置的制备方法，包括
S101、取质量百分比为10～40％的偶氮类染料与质量百分比为10～40％的可聚合单体混合均匀，并溶解于有机溶剂中，以制得蓝光吸收层混合液。其中，混合和溶解过程可以通过机械搅拌实现。所述偶氮类染料用于吸收蓝光。所述偶氮类染料可为结构通式为(1)和/或(2)。
一种实施例中，所述偶氮类染料的分子结构式为：
Figure PCTCN2017073708-appb-000009
可聚合单体用于使偶氮类染料凝聚，以便于成膜。所述可聚合单体包括丙烯酸酯、丙烯酸酯衍生物、甲基丙烯酸酯、甲基丙烯酸酯衍生物、苯乙烯、苯乙烯衍生物、及环氧树脂中的一种或多种的组合。
一种实施例中，所述可聚合单体的分子结构式为：
Figure PCTCN2017073708-appb-000010
所述有机溶剂用于使偶氮类染料分子充分分散于可聚合单体中，可以为甲醇、乙醇、N，N-二甲基甲酰胺(DMF)、二甲基亚砜、乙腈、环丁砜、丙酮、二甲基乙酰胺、六甲基磷酰胺中至少一种。
S102、将所述混合液涂覆在所述基板表面，使用波长为300～400nm的紫外光照射所述基板表面，对所述基板进行热处理，以得到蓝光吸收层。具体而言，将上述蓝光吸收层混合液通过蒸镀或旋涂等方式涂覆于所述基板表面成膜，膜厚可以为50～300nm；优选地，将上述混合液通过蒸镀方式涂覆于所述基板表面，使得成膜的厚度更加均匀。在涂覆前可在所述蓝光吸收层混合液中加入紫外光引发剂，使用波长为300～400nm(优选为365nm)的紫外光照射所述基板表面，以使所述基板上的涂覆层预固化，再将所述基板放入加热炉中热处理，以使所述基板上的涂覆层充分固化，以得到蓝光吸收层。然后，在蓝光吸收层上涂覆量子点彩色滤光层和柱状隔垫物(Photo spacer，PS)，其中，PS用于支撑盒厚。所述量子点彩色滤光层包含由量子点材料制备的红、绿、蓝彩色滤光层，用于彩色显示。红、绿、蓝彩色滤光层主要由不同尺寸的量子点和光刻胶组成，红色滤光层由光致红色发光量子点和光刻胶组成，绿色滤光层由光致绿色发光量子点和光刻胶组成，蓝色滤光层由光致蓝色发光量子点和光刻胶组成。光刻胶可以为正性光刻胶或负性光刻胶，可由环氧树脂，丙烯酸酯，分散剂，光引发剂和溶剂等组成。量子点材料可以为：CdX，PbX，ZnX，HgX，GaX，InX(X＝S、Se或Te)及以上任意材料的一种或多种的混合物，量子点材料浓度可以为0.01％～3％。
S103、将所述显示基板与液晶层、TFT基板、蓝光背光模组组合，以制得显示装置。
第二种实施例：
请参阅图4，图4是本申请第二种实施例提供的显示装置10的结构示意图。所述包括显示基板11、量子点三基色阵列层、液晶层12、TFT(薄膜晶体管)基板13及蓝光背光模组14。所述液晶层12设于所述蓝光背光模组14与所述显示基板11之间。所述液晶层12可以包括蓝相液晶。所述量子点三基色阵列层与液晶层12结合形成量子点液晶层。
所述量子点液晶层12由红色量子点液晶层、绿色量子点液晶层、蓝色量子点液晶层组成的三基色阵列。量子点材料可以为：CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。所述量子点液晶层12蓝光激发下发光，无需彩色滤光层，即可实现显示装置彩色显示。与传统的液晶层相比，所述量子点液晶层能够加宽色域，提高光的利用率，提升显示亮度和透过率。
本申请第二种实施例提供的显示装置通过设置量子点液晶层和蓝光背光模组，能加宽色域，提高光的利用率，提升显示亮度和透过率；在显示基板中设置蓝光吸收层，蓝光吸收层包括分子结构为通式(1)和/或(2)，可吸收部分从显示装置中发出的蓝光，以减少蓝光对眼睛的伤害；将量子点液晶层与液晶层相结合，无需制备彩色滤光层，即可实现彩色显示，减少显示装置的制备工艺，节约制造成本。
本申请还提供了第二种实施例提供的显示装置的制备方法，与第一种实施例提供的显示装置的制备方法相似，区别在于：不包括S102中在蓝光吸收层上涂覆量子点彩色滤光层，且液晶层是由量子点材料制备的量子点液晶层。
所述量子点液晶层包含由量子点材料制备的红、绿、蓝量子点液晶层，用于彩色显示。红、绿、蓝量子点液晶层主要由不同尺寸的量子点和蓝相液晶分子组成，红色滤光层由光致红色发光量子点和蓝相液晶分子组成，绿色滤光层由光致绿色发光量子点和蓝相液晶分子组成，蓝色滤光层由光致蓝色发光量子点和蓝相液晶分子组成。量子点材料可以为CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
第三种实施例：
请参阅图5，本实施例以液晶显示器为例，但不限于液晶显示器。
本申请提供了一种显示装置10，包括显示基板11、背光模组14及设于两者之间的液晶层12、下偏振片113、TFT基板13。所述显示基板11包括玻璃基板110及设于所述玻璃基板110上的彩色滤光层112。所述显示基板11还包括蓝光吸收层111，所述蓝光吸收层111涂覆于所述彩色滤光层112上，且设于所述彩色滤光层112与所述液晶层12之间，用于吸收所述背光模组14发出的蓝光，以减少蓝光对眼睛的伤害。所述下偏振片113设于所述液晶层12与 所述背光模组14之间，且与所述蓝光吸收层111相对。其中，所述蓝光吸收层111包括偶氮类染料，用于吸收蓝光。
优选地，所述偶氮类染料为磺酸偶氮类染料，其分子结构式可以为：
本实施例中，所述蓝光吸收层111设于所述彩色滤光层112与所述液晶层12之间，磺酸偶氮类染料使得所述蓝光吸收层111在紫外光作用下进行配向，使得所述蓝光吸收层111与下偏振片113相配合以对所述液晶层进行配向。
本申请第三种实施例提出了在显示基板中设置蓝光吸收层，其中，蓝光吸收层包括磺酸偶氮类染料，一方面，可有效地吸收波长为400～480nm的蓝光，从而极大地降低了显示装置对人眼的伤害；另一方面，磺酸偶氮类染料可在紫外光作用下进行配向，蓝光吸收层设于彩色滤光层与液晶层之间，与下偏振片相配合可作为液晶配向层，使得显示装置在有效吸收蓝光的同时，减少了配向层的制备工序，节约了制造成本。
请参阅图6，本申请提供了一种显示装置的制备方法，包括
S201、在玻璃基板上制备彩色滤光层；取质量百分比为10～40％的偶氮类染料与质量百分比为10～40％的可聚合单体混合均匀，并溶解于有机溶剂中，以制得蓝光吸收层混合液。其中，混合和溶解过程可以通过机械搅拌实现。所述偶氮类染料用于吸收蓝光。
优选地，所述偶氮类染料为磺酸偶氮类染料，其分子结构式可以为：
Figure PCTCN2017073708-appb-000012
可聚合单体用于使偶氮类染料凝聚，以便于成膜。所述可聚合单体包括丙烯酸酯、丙烯酸酯衍生物、甲基丙烯酸酯、甲基丙烯酸酯衍生物、苯乙烯、苯乙烯衍生物、及环氧树脂中的一种或多种的组合。
一种实施例中，所述可聚合单体的分子结构式为：
Figure PCTCN2017073708-appb-000013
所述有机溶剂用于使偶氮类染料分子充分分散于可聚合单体中，可以为甲醇、乙醇、N，N-二甲基甲酰胺(DMF)、二甲基亚砜、乙腈、环丁砜、丙酮、二甲基乙酰胺、六甲基磷酰胺中至少一种。
S202、将所述混合液涂覆在所述彩色滤光层表面以制得蓝光吸收层，使用波长为400～500nm的紫外光照射所述蓝光吸收层以进行配向，使用波长为300～400nm的紫外光照射所述蓝光吸收层表面，再对所述玻璃基板进行热处理，以得显示基板。具体而言，将上述蓝光吸收层混合液通过蒸镀或旋涂等方式涂覆于所述彩色滤光层表面成膜，膜厚可以为50～300nm。优选地，将上述混合液通过旋涂方式涂覆于所述基板表面，以确保蓝光吸收层成膜更为平整。在涂覆前可在所述蓝光吸收层混合液中加入紫外光引发剂，使用波长为400～500nm(优选为450nm)的紫外光照射所述蓝光吸收层以进行配向，使用波长为300～400nm(优选为365nm)的紫外光照射所述基板表面，以使所述蓝光吸收层预固化，再将所述基板放入加热炉中热处理，以使所述基板上的蓝光吸收层充分固化，以得到显示基板。
S203、将所述显示基板与液晶层、TFT基板、下偏振片、背光模组组合，以制得显示装置。
本申请实施例针对显示装置中蓝光背光模组发出的蓝光对眼睛伤害较大的问题，提出了在显示基板中设置蓝光吸收层，其中，蓝光吸收层包括偶氮类染料，其吸收波长可根据需要选择不同偶氮类材料实现。本申请提出采用通式(1)和/或(2)的偶氮类染料制备蓝光吸收层，可有效地吸收波长为400～480nm的蓝光，从而极大地降低了显示装置对人眼的伤害；由磺酸偶氮类染料制得的蓝光吸收层设于彩色滤光层与液晶层之间，与下偏振片相配合可作为液晶配向层，使得显示装置在有效吸收蓝光的同时，减少了配向层的制备工序，节约了制造成本。
以上对本申请实施方式进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施方式的说明只是用于帮助理解本申请 的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (17)

  1. 一种显示装置，其中，包括玻璃基板、蓝光吸收层及背光模组；所述蓝光吸收层涂覆于所述玻璃基板上，且设于所述玻璃基板与所述背光模组之间，用于吸收所述背光模组发出的蓝光，以减少蓝光对眼睛的伤害。
  2. 根据权利要求1所述的一种显示装置，其中，所述蓝光吸收层包括偶氮类染料和可聚合单体，所述偶氮类染料用于吸收蓝光，所述可聚合单体用于使偶氮类染料凝聚成膜。
  3. 根据权利要求2所述的一种显示装置，其中，所述偶氮类染料的质量百分数为10～40％，所述可聚合单体的质量百分数为10～40％。
  4. 根据权利要求3所述的一种显示装置，其中，所述偶氮类染料的通式为
    Figure PCTCN2017073708-appb-100001
    和/或
    Figure PCTCN2017073708-appb-100002
    ，其中，R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。
  5. 根据权利要求4所述的一种显示装置，其中，所述显示装置还包括液晶层和下偏振片；所述液晶层设于所述蓝光吸收层与所述背光模组之间，所述下偏振片设于所述液晶层与所述背光模组之间，且与所述蓝光吸收层相对；所述 偶氮类染料为磺酸偶氮燃料，使得所述蓝光吸收层在紫外光照射下进行配向；所述下偏振片与所述蓝光吸收层相配合以对所述液晶层进行配向。
  6. 根据权利要求4所述的一种显示装置，其中，所述显示装置还包括量子点三基色阵列层，所述量子点三基色阵列层设于所述玻璃基板与所述背光模组之间；所述背光模组为蓝光背光模组，用于发出蓝色激发光，以使所述量子点三基色阵列层显示彩色。
  7. 根据权利要求6所述的一种显示装置，其中，所述量子点三基色阵列层涂覆于所述蓝光吸收层上，且背离所述玻璃基板的一侧，所述量子点三基色阵列层为由量子点材料组成彩色滤光层。
  8. 根据权利要求7所述的一种显示装置，其中，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
  9. 根据权利要求6所述的一种显示装置，其中，所述量子点三基色阵列层设于涂覆于所述蓝光吸收层上，且设于所述蓝光背光模组与所述蓝光吸收层之间，所述量子点三基色阵列层为由量子点材料组成红、绿、蓝液晶层。
  10. 根据权利要求9所述的一种显示装置，其中，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
  11. 一种显示装置的制备方法，其中，包括
    取质量百分比为10～40％的偶氮类染料与质量百分比为10～40％的可聚合单体混合均匀，并溶解于有机溶剂中，以制得蓝光吸收混合液；
    将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层，使用波长为300～400nm的紫外光照射所述蓝光吸收涂层表面，再对所述玻璃基板进行热处理，以得制得蓝光吸收层；及
    将所述玻璃基板、所述蓝光吸收层与液晶层、TFT基板、背光模组组合， 以制得显示装置。
  12. 根据权利要求11所述的一种显示装置的制备方法，其中，所述偶氮类染料的通式为
    Figure PCTCN2017073708-appb-100003
    和/或
    Figure PCTCN2017073708-appb-100004
    ，其中，R1、R3、R4、R5、R8、R9为取代或未取代的烃基或羟基或其他，可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R2可以为取代或未取代的烃基或羟基或偶氮分子基团，其中，烃基或羟基可以为OH、CnH2n+1、OCnH2n+1、CnH2n、OCnH2n、COOH等基团其中的一种或者多种等；R6、R7可以为SO3Na或其他基团。
  13. 根据权利要求12所述的一种显示装置的制备方法，其中，使用量子点材料制备红、绿、蓝彩色滤光层，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te；
    在步骤“将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层”前，将所述红、绿、蓝彩色滤光层涂覆于所述玻璃基板上。
  14. 根据权利要求12所述的一种显示装置的制备方法，其中，在步骤“将所述蓝光吸收混合液涂覆在玻璃基板上以制得蓝光吸收涂层”后，在所述蓝光吸收涂层上涂覆彩色滤光层，用于显示彩色。
  15. 根据权利要求14所述的一种显示装置的制备方法，其中，所述液晶层是用量子点材料制备的红、绿、蓝液晶层，所述量子点材料包括CdX、PbX、ZnX、HgX、GaX、InX的一种或多种的混合物，其中X为S、Se或Te。
  16. 根据权利要求12所述的一种显示装置的制备方法，其中，所述偶氮类染料为磺酸偶氮燃料，以使所述蓝光吸收层在紫外光照射下可配向。
  17. 根据权利要求16所述的一种显示装置的制备方法，其中，在步骤“使 用波长为300～400nm的紫外光照射所述蓝光吸收涂层表面”前，使用波长为400～500nm的紫外光照射所述蓝光吸收涂层表面以进行配向。
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