WO2011079434A1 - 场致发射白光的装置 - Google Patents

场致发射白光的装置 Download PDF

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Publication number
WO2011079434A1
WO2011079434A1 PCT/CN2009/076191 CN2009076191W WO2011079434A1 WO 2011079434 A1 WO2011079434 A1 WO 2011079434A1 CN 2009076191 W CN2009076191 W CN 2009076191W WO 2011079434 A1 WO2011079434 A1 WO 2011079434A1
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Prior art keywords
blue
plate assembly
cathode ray
light
luminescent material
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PCT/CN2009/076191
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English (en)
French (fr)
Inventor
周明杰
马文波
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海洋王照明科技股份有限公司
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Priority to PCT/CN2009/076191 priority Critical patent/WO2011079434A1/zh
Priority to US13/514,951 priority patent/US8446088B2/en
Priority to CN200980161525.0A priority patent/CN102549710B/zh
Priority to EP09852719.5A priority patent/EP2521160B1/en
Priority to JP2012546303A priority patent/JP5775880B2/ja
Publication of WO2011079434A1 publication Critical patent/WO2011079434A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J63/00—Cathode-ray or electron-stream lamps
    • H01J63/06—Lamps with luminescent screen excited by the ray or stream
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/0883—Arsenides; Nitrides; Phosphides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/56—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing sulfur
    • C09K11/562—Chalcogenides
    • C09K11/565—Chalcogenides with zinc cadmium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/58—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing copper, silver or gold
    • C09K11/582—Chalcogenides
    • C09K11/584—Chalcogenides with zinc or cadmium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7701—Chalogenides
    • C09K11/7702—Chalogenides with zinc or cadmium
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7715—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing cerium
    • C09K11/7716—Chalcogenides
    • C09K11/7718—Chalcogenides with alkaline earth metals
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7767—Chalcogenides
    • C09K11/7769—Oxides
    • C09K11/7771—Oxysulfides
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7774—Aluminates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J29/00—Details of cathode-ray tubes or of electron-beam tubes of the types covered by group H01J31/00
    • H01J29/02—Electrodes; Screens; Mounting, supporting, spacing or insulating thereof
    • H01J29/10—Screens on or from which an image or pattern is formed, picked up, converted or stored
    • H01J29/18—Luminescent screens
    • H01J29/20—Luminescent screens characterised by the luminescent material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J63/00—Cathode-ray or electron-stream lamps
    • H01J63/02—Details, e.g. electrode, gas filling, shape of vessel
    • H01J63/04—Vessels provided with luminescent coatings; Selection of materials for the coatings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention belongs to the technical field of microelectronics, and relates to a device for emitting white light, in particular to a device for emitting white light based on field emission devices. Background technique
  • the field emission light source device works by: in a vacuum environment, the anode is applied with a forward voltage to form an accelerating electric field with respect to field emissive arrays (FEAs), and the electrons emitted by the cathode accelerate to illuminate the luminescent material on the anode plate to emit light. .
  • the device has a wide operating temperature range (-40°C ⁇ 80°C), short response time ( ⁇ lms), simple structure, power saving, and meets environmental protection requirements.
  • the field emission light source is a green energy-saving illumination source while maintaining the advantages of high efficiency and energy saving of the fluorescent tube while avoiding the environmental pollution of the fluorescent tube and the visual fatigue caused by the pulse light flash.
  • field emission cathodes can be fabricated over a large area, field emission sources have advantages in high-power, large-area illumination, and are likely to become strong competitors for LEDs in high-power light sources.
  • an illumination light source device that utilizes a blue light field emission device to excite a yellow phosphor to achieve white light emission, which completely separates the blue light emitting portion from the yellow light emitting portion, and the two parts have completely different light emitting principles, and in this device only A blue light material is directly irradiated by an electron beam.
  • the technical problem to be solved by the present invention is that in the light-emitting device of the prior art, it is required to disperse the yellow light-emitting material in a transparent epoxy resin and coat it on the outer surface of the glass substrate, which increases the manufacturing process of the light source device. And for a long time of use, the resin of the outer layer of the light source is prone to problems such as poor aging stability, and a device capable of greatly simplifying the fabrication process of the field emission light source device and capable of greatly improving the stability of the device as a field emission white light device .
  • a field emission white light device comprising a cathode plate assembly, an anode plate assembly disposed at a distance from the cathode plate assembly, and a support body for sealingly connecting the two together;
  • the anode plate assembly includes a transparent substrate excited by blue light to emit yellow light, and an anode and a blue cathode ray emitting material layer are disposed on a surface of the transparent substrate facing the cathode plate assembly, the blue cathode ray emitting material layer containing blue Cathode ray luminescent material.
  • One solution is to sequentially provide a transparent anode and a blue cathode ray luminescent material layer on the surface of the transparent substrate facing the cathode plate assembly.
  • a blue cathode ray luminescent material layer and a metal anode are sequentially disposed on the surface of the transparent substrate facing the cathode plate assembly.
  • the transparent substrate is a glass ceramic that absorbs 420 to 490 nm of blue light and emits yellow light having an emission spectrum peak in the range of 520 to 590 nm.
  • the transparent substrate is preferably a ytterbium ion doped YAG glass ceramic.
  • the blue cathode ray luminescent material is a blue luminescent material that generates a spectral peak at 420 to 490 nm under excitation of a cathode ray.
  • the blue cathode ray luminescent material is preferably Y 2 Si0 5 :Ce, SrGa 2 S 4 :Ce, ZnS:Ag, ZnS:Tm, ZnS:Zn or AlN:Eu ;
  • La ⁇ Ga ⁇ Aly0 3 xTm of La is partially or completely replaced by Y, Gd, Lu, Sc, where 0 ⁇ x ⁇ 0.1, 0 ⁇ y ⁇ lo
  • the ytterbium ion doped YAG glass ceramics is prepared by: cerium oxide, silicon dioxide, aluminum oxide and cerium oxide as main raw materials, and the raw materials are uniformly mixed into a platinum crucible at 1500 ° C to 1650 °. C was heat treated for 5 hours, and then cast molding. Finally, the formed glass was crystallized under a reducing atmosphere at a temperature of 1200 to 1500 ° C to obtain a ytterbium ion doped YAG glass ceramic.
  • the anode plate assembly is provided with an anode and a light emitting layer on the surface of the transparent substrate facing the cathode plate, and the anode is divided into Two kinds, one is a transparent anode, and the other is a metal anode.
  • a transparent anode is selected, the surface of the transparent substrate is first adhered to the transparent anode, and then the blue cathode ray luminescent material layer is coated.
  • the metal anode is selected, the surface of the transparent substrate is selected. A layer of blue cathode ray luminescent material is applied first, followed by a metal anode.
  • the transparent substrate of the present invention is a transparent substrate capable of emitting yellow light after being excited by blue light.
  • the blue cathode ray luminescent material emits blue light, and the blue light excites the transparent substrate to emit yellow light, and the yellow light and the remaining blue light are combined to form.
  • White light The device of the invention directly changes the structure and composition of the luminescent layer of the anode plate module of the conventional field emission light source, and directly forms the transparent substrate to emit yellow light after being excited by the blue light, which greatly simplifies the manufacturing process of the field emission light source device, and can greatly improve The overall stability of the device.
  • the blue cathode ray luminescent material layer of the invention emits only blue light having a spectral peak in the range of 420 to 490 nm under electron beam excitation; meanwhile, the transparent substrate is a glass ceramic, which can effectively absorb blue light of 420 to 490 nm and emit a spectral peak. In the yellow light in the range of 520 to 590 nm, the remaining blue light and the emitted yellow light combine to form white light.
  • the transparent substrate used in the present invention is a glass ceramic which partially absorbs 420 to 490 nm blue light and emits yellow light having an emission spectrum peak in the range of 520 to 590 nm. Specifically, the glass ceramic is a ytterbium ion doped YAG glass ceramic. There is no need to separately disperse the yellow light-emitting material in the transparent epoxy resin and apply it on the outer surface of the glass substrate, which saves the process.
  • the blue cathode ray luminescent material selects a blue luminescent material capable of emitting light having an emission spectrum peak at 420 to 490 nm, for example: Y 2 Si0 5 : Ce, SrGa 2 S 4 : Ce, ZnS: Ag, ZnS: Tm, ZnS: Zn, A1N: Eu, La (1-x) Ga ( 1-y) Al y 0 3 : xTm (where 0 ⁇ x ⁇ 0.1, 0 ⁇ y ⁇ l, in addition, Y, Gd, Lu, Sc partially or completely replaces La), etc., such materials have better luminescence properties under the excitation of cathode ray.
  • Y 2 Si0 5 Ce
  • SrGa 2 S 4 Ce
  • ZnS Ag
  • ZnS Tm
  • ZnS Zn
  • A1N Eu
  • Figure 1 is a schematic view showing the structure of Embodiment 1;
  • Figure 2 is a schematic view showing the structure of Embodiment 2;
  • Figure 3 is an emission spectrum of YAG glass-ceramics excited by excitation light at a wavelength of 460 nm. detailed description
  • Embodiment 1 as shown in FIG. 1, a device for emitting white light, comprising a cathode plate assembly 1, an anode plate assembly 2 disposed opposite to a cathode plate assembly, and a support body 3 for sealingly connecting the two together,
  • the cathode plate assembly 1 includes a horizontally disposed cathode plate 101 disposed on the upper surface of the cathode plate 101 Conductive cathode and gate lead 102 and electron emission source 103.
  • the anode plate assembly 2 includes a transparent substrate 203 which is a ytterbium ion doped YAG glass ceramic capable of absorbing 420 to 490 nm blue light and emitting yellow light having an emission spectrum peak in the range of 520 to 590 nm, facing the cathode plate 101.
  • the surface of the transparent substrate 203 is provided with a transparent anode 202 and a blue cathode ray-emitting material layer 201 from top to bottom.
  • the transparent anode 202 is made of indium tin oxide ITO or zinc oxide ZnO, and is subjected to magnetron sputtering or vacuum evaporation.
  • the plating method is applied on the transparent substrate 203, and the blue cathode luminescent material layer 201 emits blue light having a spectral peak in the range of 420 to 490 nm under electron beam excitation.
  • the ZnS: Ag material is selected (activated by Ag).
  • the cathode ray luminescent material layer of the ZnS fluorescent material of the agent, the blue cathode ray luminescent material layer 201 is applied to the lower surface of the transparent anode 202 by screen printing, and the support body 3 separates the anode plate assembly 2 from the cathode plate assembly 1.
  • the potential difference between the cathode plate 101 and the transparent anode 202 can be selected to be between 1 and 20 KV, such as 2 4, 5, 7, 10, 12, 15, 17, 18, 20KV and so can, in preferred 4 ⁇ 15KV.
  • Embodiment 2 as shown in FIG. 2, a device for emitting white light, comprising a cathode plate assembly 1, an anode plate assembly 4 disposed opposite to the cathode plate assembly, and a support body 3 for sealingly connecting the two together,
  • the cathode plate assembly 1 has the same structure as the cathode plate assembly of the first embodiment, and will not be described again.
  • the anode plate structure 4 comprises a transparent substrate 403 which is a ytterbium ion doped YAG glass ceramic capable of partially absorbing 420 to 490 nm blue light and emitting yellow light having an emission spectrum peak in the range of 520 to 590 nm, on the lower surface of the transparent substrate 403.
  • a blue cathode ray luminescent material layer 402 blue cathode ray luminescent material selected LaGa0 3 : Tm
  • a metal aluminum layer is further evaporated on the blue cathode luminescent material layer 402 as a metal anode 401, blue
  • the color cathode luminescent material layer 402 is applied in the same manner as in the first embodiment.
  • the blue cathode ray luminescent material may also be selected from Y 2 Si0 5: Ce, SrGa 2 S 4 : Ce, ZnS: Ag, ZnS: Tm, Sr 2 Ce0 4 , ZnS: Zn, A1N: Eu;
  • the luminescence spectrum of YAG glass-ceramics excited by excitation light with a wavelength of 460 nm shows that YAG glass-ceramics are excited to emit yellow light with a wavelength of 530 nm, which is combined with blue light. White light is formed.

Description

场致发射白光的装置 技术领域
本发明属于微电子学技术领域，涉及一种发射白光的装置， 尤其涉及一种 基于场发射器件的场致发射白光的装置。 背景技术
随着照明科技的快速发展， 研究并开发传统光源的替代品， 即节能环保 的绿色照明光源成为目前各国竞相开展的重要课题，而真空微电子学领域出现 的场发射光源器件显示出了获得绿色生态照明的一条新途径。场发射光源器件 的工作原理是：在真空环境下，阳极相对场发射阴极阵列（field emissive arrays, FEAs ) 施加正向电压形成加速电场， 阴极发射的电子加速轰向阳极板上的发 光材料而发光。该种器件的工作温度范围宽（-40°C〜80°C )、响应时间短 (<lms)、 结构简单、 省电， 符合绿色环保要求。 和传统的荧光灯管相比， 场发射光源在 保持荧光灯管高效节能优点的同时， 又避免了荧光灯管的环境污染、脉冲光闪 导致人们视觉疲劳等缺点， 是一种绿色节能照明光源。 与 LED相比， 由于场 发射阴极可以大面积制备， 场发射光源在大功率、 大面积照明方面更具优势， 有可能在大功率光源方面成为 LED的强有力竞争者。
目前，有一种利用蓝光场发射器件激发黄色荧光粉实现白光发射的照明光 源装置， 该装置使蓝光发光部分与黄光发光部分完全分开， 并且两部分的发光 原理完全不同，在这种装置中只有一种蓝光材料被电子束直接辐照，通过选用 稳定性能较佳的一种蓝光材料就可以有效降低色坐标发生偏移和光源效率下 降等光源器件的老化问题。但是， 在这种装置中， 需要将黄光发光材料分散在 透明的环氧树脂中涂敷在玻璃基板的外表面上， 这增加了光源器件的制作工 艺， 并且在长时间的使用过程中， 光源外层的树脂容易出现老化等问题。 发明内容
本发明要解决的技术问题在于，针对现有技术的发光装置中， 需要将黄光 发光材料分散在透明的环氧树脂中涂敷在玻璃基板的外表面上，这增加了光源 器件的制作工艺， 并且长时间的使用， 光源外层的树脂容易出现老化稳定性差 等问题， 提供一种能够大大简化场发射光源器件的制作工艺， 并能够大大提高 器件整体的稳定性能的场致发射白光的装置。
本发明解决其技术问题所采用的技术方案是： 一种场致发射白光的装置， 包括阴极板组件、与阴极板组件相对间隔设置的阳极板组件，将二者密封连接 在一起的支撑体，所述阳极板组件包括被蓝光激发而发射黄光的透明基板， 在 面向阴极板组件的透明基板表面设有阳极和蓝色阴极射线发光材料层，所述蓝 色阴极射线发光材料层含有蓝色阴极射线发光材料。
一种方案是：在面向阴极板组件的透明基板表面依次设有透明阳极、蓝色 阴极射线发光材料层。
另一种方案是：在面向阴极板组件的透明基板表面依次设有蓝色阴极射线 发光材料层、 金属阳极。
所述透明基板为吸收 420〜490nm 蓝光并发射出发光光谱波峰在 520〜590nm范围内黄光的微晶玻璃。
所述透明基板优选为铈离子掺杂的 YAG微晶玻璃。
所述蓝色阴极射线发光材料为在阴极射线激发下产生光谱波峰在 420〜490nm的蓝色发光材料。 所述蓝色阴极射线发光材料优选为 Y2Si05:Ce、 SrGa2S4:Ce、 ZnS:Ag、 ZnS:Tm、 ZnS:Zn或 AlN:Eu;
或者 La -χ) Ga -y) Aly03:xTm， 其中 0< x≤0.1， 0<y<l ;
或者由 Y、 Gd、 Lu、 Sc部分或完全取代 La的 La ^ Ga ^ Aly03:xTm， 其中 0< x≤0.1， 0<y<l o
所述铈离子掺杂的 YAG微晶玻璃， 其制备方法为： 以氧化铈、二氧化硅、 氧化铝、 氧化钇为主要原材料， 将原材料混合均匀放入白金坩埚中在 1500°C 〜1650°C保温处理 5小时， 然后浇注成型， 最后在还原气氛下 1200〜1500 °C温 度条件下对成型的玻璃进行晶化处理， 获得铈离子掺杂的 YAG微晶玻璃。
本发明场致发射白光的装置中， 除了现有的阴极板组件之外， 设置了不同 的阳极板组件， 此阳极板组件在面向阴极板的透明基板表面设有阳极和发光 层， 阳极分为两种， 一种是透明阳极， 一种是金属阳极， 在选择透明阳极时， 透明基板表面先贴合透明阳极， 再涂布蓝色阴极射线发光材料层，在选择金属 阳极时， 透明基板表面先涂布蓝色阴极射线发光材料层， 再设置金属阳极。本 发明的透明基板是被蓝光激发后能发射黄光的透明基板， 在阴极射线激发下， 蓝色阴极射线发光材料发出蓝光， 蓝光激发透明基板发出黄光， 黄光与剩余的 蓝光进而复合形成白光。本发明装置通过改变传统场发射光源的阳极板模块的 发光层结构和组成，将透明基板直接制成可被蓝光激发后而发射黄光， 大大简 化场发射光源器件的制作工艺， 并能够大大提高器件整体的稳定性能。
本发明蓝色阴极射线发光材料层， 在电子束激发下只发射出光谱波峰在 420〜490nm范围的蓝光；同时，透明基板为微晶玻璃，能够有效吸收 420〜490nm 的蓝光， 并发射出光谱波峰在 520〜590nm范围内的黄光， 剩余的蓝光和发出 的黄光复合形成了白光。 本发明采用的透明基板为部分吸收 420〜490nm蓝光并发射出发光光谱波 峰在 520〜590nm范围内黄光的微晶玻璃。 具体这种微晶玻璃为铈离子掺杂的 YAG微晶玻璃。 无需另外将黄光发光材料分散在透明的环氧树脂中再涂敷在 玻璃基板的外表面上， 节省了工序。
其中，蓝色阴极射线发光材料选择能够发射出发光光谱波峰在 420〜490nm 光的蓝色发光材料， 例如： Y2Si05 : Ce， SrGa2S4: Ce， ZnS: Ag， ZnS: Tm， ZnS: Zn， A1N: Eu， La (1-x) Ga ( 1-y) Aly03: xTm (其中 0< x≤0.1， 0<y<l , 另 外， 可以用 Y， Gd、 Lu、 Sc部分或完全取代 La) 等， 这类材料在阴极射线激 发下有较好的发光性能。 附图说明
下面将结合附图及实施例对本发明作进一歩说明， 附图中：
图 1是实施例 1的结构示意图；
图 2是实施例 2的结构示意图；
图 3是 YAG微晶玻璃在波长为 460nm激发光的激发下的发射光谱。 具体实施方式
通过以下实施例和附图对本发明进一歩详述：
实施例中的原料都有市售商品或通过常规技术制备，在此不再详述它们的 制备方法。
实施例 1、 如图 1所示， 一种场致发射白光的装置， 包括阴极板组件 1、 与阴极板组件相对间隔设置的阳极板组件 2， 将二者密封连接在一起的支撑体 3， 其中阴极板组件 1包括水平设置的阴极板 101、 设置在阴极板 101上表面 的导电阴极和栅极导线 102以及电子发射源 103。所述阳极板组件 2包括透明 基板 203，透明基板 203为能够吸收 420〜490nm蓝光并发射出发光光谱波峰在 520〜590nm范围内黄光的铈离子掺杂的 YAG微晶玻璃， 面向阴极板 101的透 明基板 203 表面从上至下依次设有透明阳极 202、 蓝色阴极射线发光材料层 201， 透明阳极 202是以氧化铟锡 ITO或氧化锌 ZnO为主的原料， 采用磁控溅 射或真空蒸镀方式涂敷在透明基板 203 上形成的， 蓝色阴极射线发光材料层 201在电子束激发下发射出光谱波峰在 420〜490nm范围的蓝光，本实施例选择 ZnS: Ag材料（以 Ag为激活剂的 ZnS荧光材料） 的阴极射线发光材料层， 蓝 色阴极射线发光材料层 201采用丝网印刷方式涂布于透明阳极 202的下表面， 支撑体 3将阳极板组件 2与阴极板组件 1隔开一定距离并将其密封连接，从而 构成内部真空的空间， 阴极板 101 与透明阳极 202之间的电位差可以选择为 1〜20KV之间， 如 2、 4、 5、 7、 10、 12、 15、 17、 18、 20KV等都可以， 其中 优选在 4〜15KV。
实施例 2、 如图 2所示， 一种场致发射白光的装置， 包括阴极板组件 1、 与阴极板组件相对间隔设置的阳极板组件 4， 将二者密封连接在一起的支撑体 3， 阴极板组件 1与实施例 1中的阴极板组件结构相同， 不再赘述。
阳极板结构 4包含透明基板 403，透明基板 403为能够部分吸收 420〜490nm 蓝光并发射出发光光谱波峰在 520〜590nm范围内黄光的铈离子掺杂的 YAG微 晶玻璃， 在透明基板 403下表面直接涂布有蓝色阴极射线发光材料层 402 (蓝 色阴极射线发光材料选择 LaGa03 : Tm)， 在蓝色阴极射线发光材料层 402上 再蒸镀一层金属铝层作为金属阳极 401， 蓝色阴极射线发光材料层 402的涂布 方式同实施例 1。
蓝色阴极射线发光材料还可以选择 Y2Si05: Ce、 SrGa2S4: Ce、 ZnS: Ag、 ZnS: Tm、 Sr2Ce04、 ZnS: Zn、 A1N: Eu;
La0 99Ga0 5Al0 5O3:0.01Tm、 La0 9GaO3:0.1Tm、 La0 98AlO3:0.02Tm、 Lao.92Ga0.6Alo.403:0.08Tm, La0 6Y0.33Ga0.4Al0.6O3:( 07Tm、
Gd096Ga0 35Al0 65O3:0.04Tm、 La0 2Lu0 75 Ga0 8Al0 2O3:0.05Tm 等。
如图 3所示是 YAG微晶玻璃在波长为 460nm的激发光激发下的发 谱， 图中看出 YAG微晶玻璃受到激发后发射出波长为 530nm的黄光， 该 的黄光与蓝光复合形成白色发光。

Claims

1、 一种场致发射白光的装置， 包括阴极板组件、 与阴极板组件相对间隔 设置的阳极板组件， 将二者密封连接在一起的支撑体， 其特征在于， 所述阳 极板组件包括被蓝光激发而发射黄光的透明基板， 在面向阴极板组件的透明 基板表面设有阳极和蓝色阴极射线发光材料层， 所述蓝色阴极射线发光材料 层含有蓝色阴极射线发光材料。
2、 如权利要求 1所述场致发射白光的装置， 其特征在于， 在面向阴极板 组件的透明基板表面依次设有透明阳极、 蓝色阴极射线发光材料层。
3、 如权利要求 1所述场致发射白光的装置， 其特征在于， 在面向阴极板 组件的透明基板表面依次设有蓝色阴极射线发光材料层、 金属阳极。
4、 如权利要求 1〜3任意一项所述场致发射白光的装置， 其特征在于， 所 述透明基板为吸收 420〜490nm蓝光并发射出发光光谱波峰在 520〜590nm范围 内黄光的微晶玻璃。
5、 如权利要求 4所述的场致发射发光装置， 其特征在于， 所述透明基板 为铈离子掺杂的 YAG微晶玻璃。
6、 如权利要求 1〜3任意一项所述场致发射白光的装置， 其特征在于， 所 述蓝色阴极射线发光材料为在阴极射线激发下产生光谱波峰在 420〜490nm的 蓝色发光材料。
7、 如权利要求 6所述场致发射白光的装置， 其特征在于， 所述蓝色阴极 射线发光材料为 Y2Si05:Ce、 SrGa2S4:Ce、 ZnS:Ag、 ZnS:Tm、 ZnS:Zn或 AlN:Eu; 或者 La -χ) Ga -y) Aly03:xTm， 其中 0< x≤0.1， 0<y<l ;
或者由 Y、 Gd、 Lu、 Sc部分或完全取代 La的 La ^ Ga ^ Aly03:xTm， 其中 0< x≤0.1， 0<y<l o
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