WO2014176848A1 - 背光源、液晶显示装置以及红外材料表面改性方法 - Google Patents

背光源、液晶显示装置以及红外材料表面改性方法 Download PDF

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WO2014176848A1
WO2014176848A1 PCT/CN2013/082478 CN2013082478W WO2014176848A1 WO 2014176848 A1 WO2014176848 A1 WO 2014176848A1 CN 2013082478 W CN2013082478 W CN 2013082478W WO 2014176848 A1 WO2014176848 A1 WO 2014176848A1
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Prior art keywords
infrared
backlight
infrared material
sheet
prism sheet
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PCT/CN2013/082478
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English (en)
French (fr)
Inventor
杨久霞
白峰
赵一鸣
孙晓
白冰
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北京京东方光电科技有限公司
京东方科技集团股份有限公司
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Priority to US14/236,167 priority Critical patent/US20160083646A1/en
Publication of WO2014176848A1 publication Critical patent/WO2014176848A1/zh

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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/02Use of particular materials as binders, particle coatings or suspension media therefor
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0025Diffusing sheet or layer; Prismatic sheet or layer
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0023Means for improving the coupling-in of light from the light source into the light guide provided by one optical element, or plurality thereof, placed between the light guide and the light source, or around the light source
    • G02B6/0031Reflecting element, sheet or layer
    • 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
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61NELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
    • A61N5/00Radiation therapy
    • A61N5/06Radiation therapy using light
    • A61N2005/0658Radiation therapy using light characterised by the wavelength of light used
    • A61N2005/0659Radiation therapy using light characterised by the wavelength of light used infrared
    • A61N2005/066Radiation therapy using light characterised by the wavelength of light used infrared far infrared
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0033Means for improving the coupling-out of light from the light guide
    • G02B6/005Means for improving the coupling-out of light from the light guide provided by one optical element, or plurality thereof, placed on the light output side of the light guide
    • 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
    • G02F2203/00Function characteristic
    • G02F2203/11Function characteristic involving infrared radiation

Definitions

  • Embodiments of the present invention relate to the field of liquid crystal technology, and in particular, to a backlight, a liquid crystal display device, a method for modifying an infrared material surface, and a backlight provided with an assembly including an infrared material obtained by the surface modification method.
  • Background technique
  • Embodiments of the present invention provide a backlight, a liquid crystal display device, a method of modifying an infrared material surface, and a backlight provided with an assembly including an infrared material obtained by the surface modification method to emit infrared rays under irradiation of light.
  • a backlight wherein an assembly comprising an infrared material is disposed in the backlight.
  • the component comprising the infrared material is an infrared layer made of an infrared material.
  • the backlight includes an illuminator, a package for encapsulating the illuminator, and a light guide plate on one side of the package, wherein
  • the infrared layer is disposed between the package and the light guide plate; and/or,
  • the infrared layer is disposed on the light guide plate.
  • the backlight further includes a reflective sheet under the illuminant and a diffusion sheet and a prism sheet located on the light guide plate, and the infrared layer is disposed on at least one of the reflective sheet, the diffusion sheet, and the prism sheet.
  • the infrared layer is disposed on at least one of the reflective sheet, the diffusion sheet, and the prism sheet.
  • a brightness enhancing sheet is included, and the infrared layer is disposed on one or both sides of the brightness enhancing sheet.
  • the prism sheet includes an upper prism sheet and a lower prism sheet
  • the infrared layer is disposed on one or both sides of the upper prism sheet and/or the lower prism sheet.
  • the component comprising the infrared material comprises at least one of the following components: a reflective sheet, an illuminant, a light guide, a diffuser, a prism sheet, a brightness enhancement sheet, and an illuminant package.
  • an infrared layer made of an infrared material is disposed over the entire area i or a portion of the area i or on one or both sides of the at least one component.
  • the backlight includes the following components: a reflective sheet, an encapsulant of the illuminator, a light guide plate, a diffusion sheet, a prism sheet, a brightness enhancement sheet, wherein at least one of the components is made of a material containing an infrared material.
  • the infrared material is: a mixture of one or more of biochar, tourmaline, far infrared ceramic, jade powder, aluminum oxide, copper oxide, silver oxide, and silicon carbide.
  • the infrared material has a particle size on the order of nanometers to micrometers.
  • the infrared material is surface modified such that it emits infrared light when illuminated by light.
  • a liquid crystal display device comprising the above-described backlight is provided.
  • a method for surface modification of an infrared material comprising: performing nanocrystallization treatment on an infrared material to obtain nanoparticles of an infrared material;
  • the surface characteristics of the nanoparticles subjected to the nanocrystallization treatment are changed to be compatible with the corresponding parts of the backlight, and performance matching is achieved, and infrared rays are emitted when irradiated with light.
  • the nano-processing of the infrared material comprises: grinding and dispersing the infrared material to obtain a dispersion solution of the infrared material having an average particle diameter of 1 nm to 200 nm.
  • the changing the surface characteristics of the nanoparticles after the nanocrystallization treatment comprises:
  • the molar ratio of the methyl methacrylate, styrene, maleimide is 1:1 ⁇ 2:1 ⁇ 2; the infrared material accounts for 8 ⁇ 25% of the total weight of the mixture;
  • the azo initiator solution is added dropwise in an amount of from 1 to 5% based on the total weight of the monomers.
  • the environmental strip that changes the surface characteristics of the nanoparticle after the nano-treatment is changed
  • the piece is at a temperature of 35 ° C ⁇ 60 ° C, while under a nitrogen atmosphere;
  • the duration of the reaction is from 30 minutes to 90 minutes;
  • the temperature of the organic solvent for cooling is 5 to 10 ° C;
  • the cooling is to cool to room temperature
  • the number of times the filtering is performed is three times;
  • the drying is carried out at 70 to 100 ° C for 5 minutes to 20 minutes.
  • a backlight provided with an assembly comprising an infrared material obtained by the surface modification method described above.
  • FIG. 1 is a schematic structural view of a backlight according to an embodiment of the present invention.
  • a backlight in which an assembly comprising an infrared material is disposed.
  • the component comprising the infrared material may be an infrared layer made of an infrared material. The details will be described below with reference to Fig. 1 .
  • the illuminant 2 is usually an illuminant strip, such as an LED illuminator strip or the like. Usually set outside the component illuminator 2 for each hair
  • the light body 2 is packaged with an illuminant package such as an encapsulation layer, and the light guide plate 3 is located on one side of the package (for example, the upper side of FIG. 1).
  • a brightness enhancement sheet for improving the brightness of the screen may be located on the upper surface of the upper prism sheet, such as the upper prism sheet 6 and the infrared layer in FIG. Between 7.
  • the lower prism sheet 5 and the upper prism sheet 6 may be collectively referred to as a prism sheet.
  • the relationship between the components in the backlight in the actual application is not necessarily as shown in FIG. 1. The present invention is described by taking FIG. 1 as an example.
  • the infrared layer 7 comprises a material capable of generating infrared light by heat exchange (the tube is called an infrared material), and the infrared material can generate infrared light by absorbing energy during illumination, and the wavelength of the infrared light generated. Usually 0.77 m ⁇ lmm; and, the intensity of infrared light can be controlled by the particle size, surface morphology and content of the active ingredients of the infrared material.
  • the above infrared material may be: biochar, tourmaline ([Na, K, Ca] [Mg, F, Mn, Li, Al] 3 [Al, Cr, Fe, V] 6 [B0 3 ] 3 [Si 6 0 18 ][OH,F] 4 ), a mixture of one or more of far infrared ceramics, jade powder, aluminum oxide, copper oxide, silver oxide, and silicon carbide.
  • the particle size of the infrared material can be, for example, on the order of nanometers to micrometers.
  • the infrared layer 7 is disposed (e.g., coated, etc., hereinafter) on the surface of the upper prism sheet 6 opposite to the lower prism sheet 5 (i.e., the upper surface of the upper prism sheet 6).
  • the red outer layer 7 on the surface of the upper prism sheet 6 facing the lower prism sheet 5 (i.e., under the upper prism sheet 6).
  • the infrared layer 7 can be disposed on one or both sides of the upper prism sheet 6.
  • the infrared layer 7 may be disposed on one or both sides of the lower prism sheet 5. It can be seen that the infrared layer 7 can be disposed on one or both sides of the prism sheet.
  • the infrared layer 7 may be disposed on one or both sides of at least one of the reflection sheet 1, the diffusion sheet 4, and the brightness enhancement sheet.
  • the infrared layer 7 may be disposed on one or both sides of the reflection sheet 1, or the infrared layer 7 may be disposed on one or both sides of the diffusion sheet 4, or the red outer layer 7 may be disposed on one or both sides of the brightness enhancement sheet.
  • the infrared layer 7 may be disposed outside the aforementioned illuminant package.
  • the infrared layer 7 may be disposed on the surface of the light guide plate 3 opposite to the reflection sheet 1 (i.e., the upper surface of the light guide plate 3).
  • the infrared layer 7 may be disposed between the light guide plate 3 and the package (ie, under the light guide plate 3). It can be seen that the infrared layer 7 can be disposed on one or both sides of the light guide plate 3.
  • the infrared layer 7 is provided in any one or more On one or both sides of the assembly, the infrared layer 7 can be applied to the entire area i or part of the area i or on one or both sides of the respective component.
  • a backlight whether the backlight is provided with the infrared layer 7, or the infrared material contained in the infrared layer 7 can be doped in the production of each component of the backlight.
  • the infrared material contained in the infrared layer 7 is doped in the raw material of at least one of the following components: the reflective sheet 1, the illuminant 2, the light guide plate 3, the diffusion sheet 4, the lower prism Sheet 5, upper prism sheet 6, brightening sheet, and illuminant package.
  • the infrared material in the infrared layer 7 described above may be surface-modified, so that the infrared material can achieve the best compatibility with the corresponding components of the backlight and the performance, without affecting the backlight performance.
  • the surface-modified infrared material emits far-infrared rays of a specific wavelength at a high specific radiance.
  • the purpose of the surface modification treatment is to change the surface morphology and grain boundary structure of the infrared material, thereby achieving compatibility with the corresponding structure of the backlight without affecting the performance of the backlight; and the purpose of the surface modification treatment is also By changing the surface morphology and grain boundary structure of the infrared material, the activity of the infrared material is changed, the heat exchange capacity is improved, and the far-infrared rays of a specific wavelength are emitted at a high specific emissivity.
  • a method of surface modification of an infrared material comprising the steps of:
  • the main purpose of this step 1) is to nano-process the infrared material to obtain nanoparticles of the infrared material.
  • the grinding and dispersing method can be carried out by a usual method for preparing a nano material, for example, by using a conventional grinding apparatus (e.g., a ball mill, a sand mill, etc.) and a dispersing agent in an organic solvent.
  • the infrared material in the nano-dispersion solution may have a weight percentage of 10 to 15%.
  • the step 1) comprises: grinding and dispersing the infrared material to obtain a nano-dispersion solution of the infrared material having an average particle diameter of 1 nm to 200 nm.
  • step 2) is to change the surface characteristics of the dispersed nanoparticles in step 1) so as to be compatible with the corresponding structure of the liquid crystal cell, without affecting the performance of the display device;
  • the nano-treated infrared material is further subjected to surface modification to change the activity of the infrared material, improve heat exchange capability, and emit far-infrared rays of a specific wavelength at a high specific emissivity.
  • the step 2) includes:
  • the step 2) includes:
  • An azo initiator such as azobisisovaleronitrile, azobisisobutyronitrile, azobisisohexonitrile, azobisisoheptanenitrile or the like is dissolved in an organic solvent for use;
  • the nano-dispersion of the infrared material is dissolved in a four-necked bottle, and the mixture is stirred, oscillated (frequency is higher than 50 Hz) or shaken;
  • the monomer methyl methacrylate, styrene, maleimide (l:1 ⁇ 2:l ⁇ 2/mol) is dissolved in an organic solvent (monomer and organic solvent by volume ratio 1:1 ⁇ 1:3) And adding the obtained solution to the above four-necked bottle, wherein the infrared material accounts for 8 to 25%, preferably 10 to 20%, more preferably 12 to 17%, based on the total weight of the mixed solution in the four-necked bottle;
  • the environmental conditions for the surface characteristics of the nanoparticles after the nano-treatment is changed are at 35 ° C-60 .
  • the azo initiator solution is added dropwise to the above four bottles in an amount of 1 to 5% of the initiator based on the total weight of the above monomers, stirring, shaking or shaking
  • the reaction is carried out for 30 minutes to 90 minutes under the same treatment;
  • the filtered solid was washed with the above organic solvent for dissolving the monomer, and dried at 70 to 100 ° C for 5 minutes to 20 minutes to obtain a surface-modified infrared material.
  • the organic solvent used in the above method may be a fatty alcohol, a glycol ether, ethyl acetate, methyl ethyl ketone, methyl isobutyl ketone, monomethyl ether glycol ester, ⁇ - butyrolactone, propionic acid-3-ethyl ether.
  • the dispersing agent used in the above method is a usual dispersing agent such as cesium 410, ⁇ 110, ⁇ 163, ⁇ 161, ⁇ 2000 and the like. Dispersant accounts for nanometers: the weight percentage of the solution is 5% ⁇ 15%, preferably 7-12%.
  • liquid crystal cell in which an assembly comprising an infrared material is provided, the infrared material being obtained according to the above surface modification method.
  • a liquid crystal display device comprising a backlight, and further comprising any of the above liquid crystal cells.
  • the liquid crystal display device may be a display of a portable electronic device such as a portable computer, a mobile phone, an electronic book or the like.
  • the backlight of the above embodiment of the present invention is provided with an infrared material-containing component, the backlight can emit infrared light having strong penetrating power and radiation force.
  • the water molecules in the human body can resonate. Activates water molecules, enhances the binding force between water molecules, and activates biological macromolecules such as proteins, so that biological cells are at high vibrational levels. Due to the resonance effect of biological cells, the far-infrared heat energy can be transmitted to the deeper part of the human skin. Therefore, the deep temperature rises, the generated heat is emitted from the inside to the outside, the blood vessels are dilated, the blood circulation is promoted, and the metabolism between tissues is enhanced.
  • the backlight can emit infrared light to the outside of the liquid crystal display device, and thus the liquid crystal display device is advantageous for health.
  • the surface-modified infrared material can achieve the best compatibility with the corresponding components of the backlight and the best performance of the performance, and improve the heat exchange capability of the infrared material with the backlight and the external light without affecting the comprehensive performance of the backlight.
  • the surface-modified infrared material emits far-infrared rays of a specific wavelength at a high specific radiance.

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Abstract

一种液晶显示装置及其背光源以及一种红外材料表面改性方法。背光源中设置有包含红外材料的组件,红外材料通过表面改性方法获得。由于背光源可以发出红外线,因此有利于健康,以及,经过表面改性的红外材料能够实现与背光源相应部件的相容以及性能的最佳匹配,在不影响背光源综合性能的情况下提高红外材料与背光及外界光的热交换能力,经过表面改性的红外材料以高的比辐射率放射特定波长的远红外线。

Description

背光源、 液晶显示装置以及红外材料表面改性方法 技术领域
本发明实施例涉及液晶技术领域,具体涉及一种背光源、液晶显示装置、 红外材料表面改性方法, 以及设置有包含由该表面改性方法获得的红外材料 的组件的背光源。 背景技术
随着显示技术的快速发展, 人们不仅要求显示器件能实现高清晰、 高对 比度和高的亮度等显示效果, 同时还对显示器件的功能多元化有了进一步要 求, 例如显示器件的娱乐性和保健性。 发明内容
本发明的实施例提供一种背光源、 液晶显示装置、 红外材料表面改性方 法以及设置有包含由该表面改性方法获得的红外材料的组件的背光源, 以在 光的照射下发出红外线。
根据本发明的第一方面, 提供一种背光源, 其中该背光源中设置有包含 红外材料的组件。
在一个示例中, 所述包含红外材料的组件是由红外材料制成的红外层。 在一个示例中, 该背光源包括发光体、 用于封装该发光体的封装物和位 于封装物一侧的导光板, 其中
所述红外层设置于所述封装物和导光板之间; 和 /或,
所述红外层设置于所述导光板上。
在一个示例中, 该背光源还包括位于发光体下的反射片和位于导光板之 上的扩散片、 棱镜片, 所述红外层设置于所述反射片、 扩散片和棱镜片中的 至少一个的一面或两面上。
在一个示例中, 包括增亮片, 所述红外层设置于所述增亮片的一面或两 面上。
在一个示例中, 所述棱镜片包括上棱镜片、 下棱镜片, 所述红外层设置 于所述上棱镜片和 /或下棱镜片的一面或两面上。 在一个示例中, 所述包含红外材料的组件包括以下组件中至少之一: 反 射片、 发光体、 导光板、 扩散片、 棱镜片、 增亮片、 发光体的封装物。
在一个示例中, 由红外材料制成的红外层设置于所述至少一个组件的一 面或两面的整个区 i或或部分区 i或。
在一个示例中, 背光源包括以下组件: 反射片、 发光体的封装物、 导光 板、 扩散片、 棱镜片、 增亮片, 其中这些组件中的至少之一者由包含红外材 料的材料制成。
在一个示例中, 所述红外材料为: 生物炭、 电气石、 远红外陶瓷、 玉石 粉、 氧化铝、 氧化铜、 氧化银以及碳化硅中的一种或一种以上的混合物。
在一个示例中, 所述红外材料的粒径在纳米级至微米级。
在一个示例中, 所述红外材料是经过表面改性以使其在被光照射时发射 出红外光线。
根据本发明的第二方面, 提供一种液晶显示装置, 包括上述的背光源。 根据本发明的第三方面, 提供一种红外材料表面改性方法, 包括: 对红外材料进行纳米化处理, 获得红外材料的纳米粒子;
改变进行纳米化处理后的纳米粒子的表面特性, 使其与背光源的相应部 件相容、 并且实现性能匹配, 并在被光照射时发射出红外光线。
在一个示例中, 所述对红外材料进行纳米化处理, 包括: 将红外材料研 磨、 分散, 获得平均粒径为 lnm~200nm的红外材料的分散溶液。
在一个示例中, 所述改变进行纳米化处理后的纳米粒子的表面特性, 包 括:
将所述红外材料的^:溶液与含有甲基丙烯酸甲酯、 苯乙烯、 马来酰亚 胺的有机溶液混合, 然后将偶氮类引发剂溶液加入上述混合物中; 以及
待反应结束后, 加入冷却用有机溶剂进行冷却并搅拌, 直至反应产物冷 却后过滤、 干燥, 得到表面改性的红外材料。
在一个示例中, 所述甲基丙烯酸甲酯、 苯乙烯、 马来酰亚胺的摩尔比例 为 1:1~2:1~2; 所述红外材料占混合物总重量的 8~25%; 以及加入所述偶氮 类引发剂溶液时, 偶氮类引发剂溶液以基于单体总重量的 1~5%的量逐滴加 入。
在一个示例中, 所述改变进行纳米化处理后纳米粒子表面特性的环境条 件是在 35° C~60° C温度下、 同时在氮气气氛下;
所述反应的时长为 30分钟 ~90分钟;
所述冷却用有机溶剂的温度为 5~10°C ;
所述冷却为冷却至室温;
进行所述过滤的次数为三次; 以及
所述干燥为在 70~ 100°C下干燥 5分钟 ~20分钟。
根据本发明的第四方面, 提供一种背光源, 该背光源中设置有包含红外 材料的组件, 所述红外材料是根据上述的表面改性方法得到。 附图说明
为了更清楚地说明本发明实施例的技术方案, 下面将对实施例的附图作 筒单地介绍,显而易见地,下面描述中的附图仅仅涉及本发明的一些实施例, 而非对本发明的限制。
图 1为本发明实施例的背光源的结构示意图。
附图标记说明:
1、 反射片; 2、 发光体; 3、 导光板; 4、 扩散片; 5、 下棱镜片; 6、 上 棱镜片; 7、 红外层。 具体实施方式
为使本发明实施例的目的、 技术方案和优点更加清楚, 下面将结合本发 明实施例的附图,对本发明实施例的技术方案进行清楚、 完整地描述。显然, 所描述的实施例是本发明的一部分实施例, 而不是全部的实施例。 基于所描 述的本发明的实施例, 本领域普通技术人员在无需创造性劳动的前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
根据本发明一实施例, 提供一种背光源, 该背光源中设置有包含红外材 料的组件。 例如, 该包含红外材料的组件可以是由红外材料制成的红外层。 以下参照图 1进行详细说明。
图 1是根据本发明一示例的液晶盒, 包括反射片 1、发光体 2、导光板 3、 扩散片 4、 下棱镜片 5、 上棱镜片 6、 红外层 7。 发光体 2的形式通常为发光 体条, 如: LED发光体条等。 通常在组成发光体 2的外部设置用于将每个发 光体 2封装起来的诸如封装层等发光体封装物, 导光板 3位于该封装物的一 侧(例如图 1的上侧)。 图 1所示的背光源中还可包括增亮片等组件, 所述增 量片用来提高屏幕的亮度, 其可位于上棱镜片的上表面, 例如图 1中的上棱 镜片 6和红外层 7之间。本文中,下棱镜片 5与上棱镜片 6可统称为棱镜片。 当然, 实际应用中的背光源中各组件关系不一定如图 1所示, 本发明只是以 图 1为例进行描述。
在图 1所示背光源中, 红外层 7包含能够通过热交换产生红外光线的材 料(筒称红外材料),该红外材料可以在光照时通过吸收能量从而产生红外光 线, 产生的红外光线的波长通常为 0.77 m~lmm; 并且, 红外光线的强弱可 以通过红外材料的有效成分的粒径、 表面形态和含量来控制。
上 述 的 该 红 外 材 料 可 以 是 : 生 物 炭 、 电 气 石 ( [Na,K,Ca][Mg,F,Mn,Li,Al]3[Al,Cr,Fe,V]6[B03]3[Si6018][OH,F]4 )、 远红外陶 瓷、 玉石粉、 氧化铝、 氧化铜、 氧化银以及碳化硅中的一种或一种以上的混 合物。 红外材料的粒径例如可在纳米级至微米级。
如图 1所示, 红外层 7设置(如: 涂布等, 以下亦同)于上棱镜片 6的 与下棱镜片 5相反侧的表面 (即上棱镜片 6的上面)上。 当然, 也可以将红 外层 7设置于上棱镜片 6面向下棱镜片 5的表面(即上棱镜片 6的下面)上。 可见, 可以将红外层 7设置于上棱镜片 6的一面或两面上。 同理, 也可以将 红外层 7设置于下棱镜片 5的一面或两面上。 可见, 可以将红外层 7设置于 棱镜片的一面或两面上。
在本发明的其他示例中, 还可以将红外层 7设置于反射片 1、 扩散片 4、 增亮片中的至少一个的一面或两面上。 例如, 可以将红外层 7设置于反射片 1的一面或两面上, 或将红外层 7设置于扩散片 4的一面或两面上, 或将红 外层 7设置于增亮片的一面或两面上。
除了图 1所示的将红外层 7设置于上棱镜片 6的上面这种方式以外, 在 本发明的其他示例中,还可以将红外层 7设置于前述的发光体封装物的外部。
在本发明的其他示例中, 也可以将红外层 7设置于导光板 3的与反射片 1相反侧的表面 (即导光板 3的上面)上。 当然, 还可以将红外层 7设置于 导光板 3和封装物之间(即导光板 3的下面)。 可见, 可以将红外层 7设置于 导光板 3的一面或两面上。 再有, 针对背光源的反射片 1、 发光体 2、 导光板 3、 扩散片 4、 下棱镜 片 5、上棱镜片 6、增光片等组件, 无论将红外层 7设置于任一个或多个组件 的一面还是两面上, 均可以将红外层 7涂布在相应组件的一面或两面的整个 区 i或或部分区 i或。
根据本发明的另一个实施例, 还提供一种背光源, 无论该背光源是否设 置有红外层 7, 均可在生产背光源的各组件时, 将红外层 7所包含的红外材 料掺杂在至少一个组件的原材料中, 如: 将红外层 7所包含的红外材料掺杂 在以下组件中至少之一组件的原材料中: 反射片 1、 发光体 2、 导光板 3、 扩 散片 4、 下棱镜片 5、 上棱镜片 6、 增亮片、 发光体封装物。
再有, 上述的红外层 7中的红外材料可以是经过表面改性处理的, 这样 该红外材料就能够实现与背光源相应部件间的相容以及性能的最佳匹配, 在 不影响背光源性能的情况下提高红外材料与背光及外界光的热交换能力, 经 过表面改性的红外材料以高的比辐射率放射特定波长的远红外线。 所述表面 改性处理的目的在于改变所述红外材料的表面形态、 晶界结构, 从而实现使 其与背光源相应结构相容, 不影响背光源的性能; 同时表面改性处理的目的 还在于通过改变所述红外材料的表面形态、 晶界结构, 从而改变红外材料的 活性, 提高热交换能力, 以高的比辐射率放射特定波长的远红外线。
根据本发明的再一实施例, 提供一种对红外材料的表面改性的方法, 包 括以下步骤:
1 )对红外材料进行纳米化处理, 获得红外材料的纳米粒子; 以及
2 )改变进行纳米化处理后的纳米粒子的表面特性,以使其与液晶盒相应 结构层相容、 并与其性能匹配, 并在被光照射时发射出红外光线。
该步骤 1 ) 的主要目的是对红外材料进行纳米化处理, 以获得红外材料 的纳米粒子。 该研磨、 分散方法可用制备纳米材料的常用方法进行, 例如可 采用常规的研磨装置(例如球磨机、砂磨机等 )和分散剂在有机溶剂中进行。 该纳米分散溶液中的红外材料的重量百分比可为 10~15%。 在一个示例中, 所述步骤 1 )包括: 将红外材料研磨、 分散, 获得平均粒径为 lnm~200nm的 红外材料纳米分散溶液。
步骤 2 )的目的是改变步骤 1 )中分散后的纳米粒子的表面特性,使其与 液晶盒相应结构相容, 不影响显示器件的性能; 同时该步骤的目的还在于通 过将经过纳米化处理的红外材料进行进一步的表面改性, 从而改变红外材料 的活性, 提高热交换能力, 以高的比辐射率放射特定波长的远红外线。 在一 个示例中, 所述步骤 2 ) 包括:
将所述红外材料的^:溶液与含有甲基丙烯酸甲酯、 苯乙烯、 马来酰亚 胺的有机溶液混合, 然后将偶氮类引发剂溶液加入上述混合物中; 以及
待反应结束后, 加入冷却用有机溶剂进行冷却并搅拌, 直至反应产物冷 却后过滤、 干燥, 得到表面改性的红外材料。
在另一个示例中, 所述步骤 2 ) 包括:
将诸如偶氮二异戊腈、 偶氮二异丁腈、 偶氮二异己腈、 偶氮二异庚腈等 的偶氮类引发剂溶解在有机溶剂中待用;
将红外材料的纳米分散溶 '^ΙΤ 四口瓶内,同时对其进行搅拌、震荡(频 率高于 50Hz )或摇动等处理;
将单体甲基丙烯酸甲酯、 苯乙烯、 马来酰亚胺(l:l~2:l~2/mol )溶于有 机溶剂 (单体和有机溶剂按体积比例 1:1~1:3),并将所得到溶液加入上述四口 瓶内, 其中红外材料占四口瓶内混合溶液总重量的 8~25%, 优选 10~20%, 更优选 12~17%;
所述改变进行纳米化处理后纳米粒子表面特性的环境条件是在 35° C-60 。( 温度下、 同时在氮气气氛下,使偶氮类引发剂溶液以基于以上单体的总重 量的 1~5%的引发剂的量逐滴加入上述四口瓶内, 在搅拌、 震荡或摇动等处 理下进行反应 30分钟 ~90分钟;
反应结束后加入 5~10°C的冷却用有机溶剂进行冷却处理, 同时搅拌直至 反应产物冷却至室温;
过滤三次后, 用上述用于溶解单体的有机溶剂清洗滤出的固体, 在 70~100°C下干燥 5分钟 ~20分钟, 得到表面改性的红外材料。
以上方法中所用有机溶剂可为脂肪醇、 乙二醇醚、 乙酸乙酯、 甲乙酮、 甲基异丁基酮、 单甲基醚乙二醇酯、 γ -丁内酯、 丙酸 -3-乙醚乙酯、 丁基卡必 醇、 丁基卡必醇醋酸酯、 丙二醇单甲基醚、 丙二醇单甲基醚醋酸酯、 环己烷、 二甲苯、 异丙醇中的一种或多种。
以上方法中所用分散剂为常用分散剂, 例如 ΒΥΚ 410、 ΒΥΚ 110、 ΒΥΚ 163、 ΒΥΚ 161、 ΒΥΚ 2000等。分散剂占纳米^:溶液的重量百分比为 5% ~ 15%, 优选为 7 ~ 12%。
根据本发明的又一实施例, 还提供一种液晶盒, 该液晶盒中设置有包含 红外材料的组件, 所述红外材料根据以上表面改性方法得到。
根据本发明的再一实施例, 还提供一种液晶显示装置, 包括背光源, 还 包括以上任一种液晶盒。 该液晶显示装置可以为诸如便携式电脑、 手机、 电 子书等便携式电子设备的显示器。
由于本发明上述实施例的背光源中设置有包含红外材料的组件, 因此背 光源可以发出较强渗透力和辐射力的红外光线, 红外光线被人体吸收后, 可 使人体内水分子产生共振, 使水分子活化, 增强水分子间的结合力, 从而活 化蛋白质等生物大分子, 使生物细胞处于高振动能级。 由于生物细胞产生共 振效应, 可将远红外热能传递到人体皮下较深的部分, 因此深层温度上升, 产生的热量由内向外散发, 使毛细血管扩张, 促进血液循环, 强化各组织之 间的新陈代谢, 增加组织的再生能力, 提高机体的免疫能力, 有利于健康, 也能尽量减轻电磁辐射对身体健康的影响。 同理, 在包含本发明的所述背光 源的液晶显示装置中, 背光源可以向液晶显示装置外部发出红外光线, 因此 所述液晶显示装置有利于健康。 再有, 经过表面改性的红外材料能够实现与 背光源相应部件间的相容以及性能的最佳匹配, 在不影响背光源综合性能的 情况下提高红外材料与背光及外界光的热交换能力, 经过表面改性的红外材 料以高的比辐射率放射特定波长的远红外线。
以上所述仅是本发明的示范性实施方式, 而非用于限制本发明的保护范 围, 本发明的保护范围由所附的权利要求确定。

Claims

权利要求书
1、 一种背光源, 其中该背光源中设置有包含红外材料的组件。
2、根据权利要求 1所述的背光源,其中所述包含红外材料的组件是由红 外材料制成的红外层。
3、根据权利要求 2所述的背光源, 包括发光体、用于封装该发光体的封 装物和位于封装物一侧的导光板, 其中
所述红外层设置于所述封装物和导光板之间; 和 /或,
所述红外层设置于所述导光板上。
4、根据权利要求 3所述的背光源,还包括位于发光体下的反射片和位于 导光板之上的扩散片、 棱镜片, 所述红外层设置于所述反射片、 扩散片和棱 镜片中的至少一个的一面或两面上。
5、根据权利要求 2所述的背光源, 包括增亮片, 所述红外层设置于所述 增亮片的一面或两面上。
6、根据权利要求 4所述的背光源, 其中所述棱镜片包括上棱镜片、 下棱 镜片, 所述红外层设置于所述上棱镜片和 /或下棱镜片的一面或两面上。
7、根据权利要求 1所述的背光源,其中所述包含红外材料的组件包括以 下组件中至少之一: 反射片、 发光体、 导光板、 扩散片、 棱镜片、 增亮片、 发光体的封装物。
8、根据权利要求 7所述的背光源,其中由红外材料制成的红外层设置于 所述至少一个组件的一面或两面的整个区 i或或部分区 i或。
9、 根据权利要求 1所述的背光源, 包括反射片、发光体的封装物、 导光 板、 扩散片、 棱镜片、 增亮片, 其中这些中的至少之一者由包含红外材料的 材料制成。
10、 根据权利要求 1所述的背光源, 其中所述红外材料为: 生物炭、 电 气石、 远红外陶瓷、 玉石粉、 氧化铝、 氧化铜、 氧化银以及碳化硅中的一种 或一种以上的混合物。
11、 根据权利要求 1所述的背光源, 其中所述红外材料的粒径在纳米级 至微米级。
12、 根据权利要求 1所述的背光源, 其中所述红外材料是经过表面改性 以使其在被光照射时发射出红外光线。
13、 一种液晶显示装置, 包括如权利要求 1至 12任一项所述的背光源。
14、 一种红外材料表面改性方法, 包括:
对红外材料进行纳米化处理, 获得红外材料的纳米粒子;
改变进行纳米化处理后的纳米粒子的表面特性, 使其与背光源的相应部 件相容、 并且实现性能匹配, 并在被光照射时发射出红外光线。
15、根据权利要求 14所述的方法,其中所述对红外材料进行纳米化处理, 包括: 将红外材料研磨、 分散, 获得平均粒径为 lnm~200nm的红外材料的 溶液。
16、根据权利要求 15所述的方法,其中所述改变进行纳米化处理后的纳 米粒子的表面特性, 包括:
将所述红外材料的^:溶液与含有甲基丙烯酸甲酯、 苯乙烯、 马来酰亚 胺的有机溶液混合, 然后将偶氮类引发剂溶液加入上述混合物中; 以及
待反应结束后, 加入冷却用有机溶剂进行冷却并搅拌, 直至反应产物冷 却后过滤、 干燥, 得到表面改性的红外材料。
17、 根据权利要求 16所述的方法, 其中所述甲基丙烯酸甲酯、 苯乙烯、 马来酰亚胺的摩尔比例为 1:1~2:1~2; 所述红外材料占混合物总重量的 8-25%; 以及加入所述偶氮类引发剂溶液时, 偶氮类引发剂溶液以基于单体 总重量的 1~5%的量逐滴加入。
18、根据权利要求 16所述的方法,其中所述改变进行纳米化处理后纳米 粒子表面特性的环境条件是在 35° C~60° C温度下、 同时在氮气气氛下;
所述反应的时长为 30分钟 ~90分钟;
所述冷却用有机溶剂的温度为 5~10°C ;
所述冷却为冷却至室温;
进行所述过滤的次数为三次; 以及
所述干燥为在 70~ 100°C下干燥 5分钟 ~20分钟。
19、 一种背光源, 该背光源中设置有包含红外材料的组件, 所述红外材 料是根据权利要求 14-18任一项所述的表面改性方法得到。
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