WO2015055007A1 - 照明装置及其制作方法 - Google Patents

照明装置及其制作方法 Download PDF

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Publication number
WO2015055007A1
WO2015055007A1 PCT/CN2014/078355 CN2014078355W WO2015055007A1 WO 2015055007 A1 WO2015055007 A1 WO 2015055007A1 CN 2014078355 W CN2014078355 W CN 2014078355W WO 2015055007 A1 WO2015055007 A1 WO 2015055007A1
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Prior art keywords
luminescent coating
light source
light
lighting device
substrate
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PCT/CN2014/078355
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English (en)
French (fr)
Inventor
孙力
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京东方科技集团股份有限公司
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Priority to US14/416,348 priority Critical patent/US20160005796A1/en
Publication of WO2015055007A1 publication Critical patent/WO2015055007A1/zh

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    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/30Devices specially adapted for multicolour light emission
    • H10K59/38Devices specially adapted for multicolour light emission comprising colour filters or colour changing media [CCM]
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • H10K50/125OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers specially adapted for multicolour light emission, e.g. for emitting white light
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/80Constructional details
    • H10K50/84Passivation; Containers; Encapsulations
    • H10K50/844Encapsulations
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K71/00Manufacture or treatment specially adapted for the organic devices covered by this subclass
    • H10K71/10Deposition of organic active material
    • H10K71/12Deposition of organic active material using liquid deposition, e.g. spin coating
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00Constructional details relating to the organic devices covered by this subclass
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K2102/00Constructional details relating to the organic devices covered by this subclass
    • H10K2102/301Details of OLEDs
    • H10K2102/351Thickness

Definitions

  • Embodiments of the present invention relate to a lighting device and a method of fabricating the same. Background technique
  • the organic light emitting diode can easily form a planar or curved light source on a planar substrate and a flexible substrate, and has the advantages of low energy consumption, and can replace the point source, the line source, the light guide plate, and the diffusion film to form a surface light source.
  • Ways to achieve a white surface light source include mixing red, green, and blue light (RGB) or mixing yellow and blue light (YB) to obtain white light.
  • RGB red, green, and blue light
  • YB yellow and blue light
  • an OLED unit that emits these color lights can be used, and the light emitted by each OLED unit is mixed to generate white light. It is also possible to use an OLED unit that emits short-wavelength light to cause light of a short wavelength to excite the light-emitting layer, so that the light-emitting layer emits light of a long wavelength, and the long-wavelength light is remixed to form white light.
  • the blue light emitted by the blue OLED excites the red light emitting coating and the green light emitting coating to respectively generate red light and green light, and the red light and the green light are mixed with the blue light to generate white light; or the blue light emitted by the blue OLED
  • the yellow light emitting coating is excited to produce yellow light which is then mixed with the blue light to produce white light.
  • High-energy short-wavelength light excites lower-energy, longer-wavelength light, and photons are used to generate photons.
  • At least one embodiment of the present invention provides a lighting device and a method of fabricating the same that enable emergency lighting without power.
  • At least one embodiment of the present invention provides an illumination device comprising: a substrate, a light source on the substrate, and a luminescent coating.
  • the light source emits light having a wavelength less than a wavelength at which the luminescent coating is excited to emit light, and the light emitted by the light source excites the luminescent coating to emit light, and the luminescent coating is a material having a long afterglow characteristic.
  • the light source is located above the substrate, and the luminescent coating is located Above the light source, the light exiting surface of the light source faces the luminescent coating.
  • the illumination device further includes a transparent encapsulation layer over the luminescent coating.
  • the luminescent coating is on the substrate, and the substrate is a transparent substrate, the light source is located on the luminescent coating, and a light emitting surface of the light source faces the Luminous coating.
  • the illumination device further includes an encapsulation layer over the luminescent coating.
  • At least one embodiment of the present invention also provides a method of fabricating a lighting device, the method comprising forming a light source and a luminescent coating on a substrate.
  • the light source emits light having a wavelength less than a wavelength at which the luminescent coating is excited to emit light, and the light emitted by the light source excites the luminescent coating to emit light, and the luminescent coating is a material having a long afterglow characteristic.
  • the light source is formed on the substrate such that a light exiting surface of the light source faces away from the substrate; and the light emitting coating is formed on a light exiting surface of the light source.
  • a transparent encapsulation layer is formed.
  • the method comprises: forming the luminescent coating on the substrate, the substrate being a transparent substrate; forming a light source over the luminescent coating to illuminate the illuminating surface of the light source Facing the luminescent coating.
  • the method forms light over the luminescent coating
  • An encapsulation layer is formed over the light source.
  • FIG. 1 is a schematic structural view of a lighting device according to an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a lighting device according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a lighting device according to another embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a lighting device according to another embodiment of the present invention. detailed description
  • At least one embodiment of the present invention provides a lighting device comprising: a substrate, a light source on the substrate, and a luminescent coating having long afterglow characteristics.
  • the wavelength at which the light source emits light is less than the wavelength at which the light-emitting coating is excited to emit light, and the light emitted by the light source excites the luminescent coating to emit light. Since the luminescent coating is a long afterglow material, it can emit light in an emergency without power.
  • a white light illumination device that emits light can be used as an example, and a blue light source (which may be a blue OLED with a blue wavelength of less than 450 nm) can be used to excite green light.
  • a coating and a red light-emitting coating to emit green light (wavelengths of 530 to 580 nm) and red light (wavelength of 600 to 650 nm), respectively, and the excited green and red light is mixed with the blue light emitted by the blue light source.
  • the illumination device includes a substrate 110, and includes a blue light source 120 over the substrate 110 and a luminescent coating over the blue light source 120.
  • the luminescent coating is: a green luminescent coating 131 and a red luminescent coating 132.
  • the light-emitting surface of the blue light source 120 faces the green light-emitting coating 131 and the red light-emitting coating 132.
  • the green light-emitting coating 131 and the red light-emitting coating 132 do not completely cover the light-emitting surface of the blue light source 120.
  • the green light-emitting coating 131 and the red light-emitting coating 132 are excited, and the green light-emitting coating 131 and the red light-emitting coating 132 can completely cover the light-emitting surface of the blue light source 120.
  • a transparent encapsulation layer 140 over the green light-emitting coating 131 and the red light-emitting coating 132 is also included.
  • the transparent encapsulation layer 140 is capable of allowing light to pass through.
  • a plurality of structures for uniformly mixing the light may be disposed in the transparent encapsulation layer 140, and the structure for uniformly mixing the light may be a light mixing structure in the light guide plate similar to the backlight of the liquid crystal display device.
  • a single light mixing may be separately formed on the side of the transparent encapsulation layer 140 facing the luminescent coating or facing away from the luminescent coating. Floor.
  • the luminescent coating may also replace the green luminescent coating 131 and the red luminescent coating 132 with a yellow luminescent coating 133.
  • the luminescent coating is a material having a long afterglow characteristic, and may be, for example, a silicic acid including a doped rare earth (e.g., Eu, Sm or Ce, etc.) ions. a salt, an aluminate or a carbonate; or a silicate, aluminate or carbonate doped with a transition metal (Cu or Mn, etc.), or any combination thereof.
  • a silicic acid including a doped rare earth (e.g., Eu, Sm or Ce, etc.) ions.
  • the luminescent coating is too thin, the red-green light (or yellow light) is excited, the red-green light is too weak, and if the luminescent coating is too thick, the red-green light (or yellow light) penetrates. The path is too long and the light that is ultimately penetrated is also weak.
  • the luminescent coating may have a thickness of 0.5 to 100 ⁇ m.
  • the luminescence during this period is generated without external photoelectric excitation, which is often said afterglow.
  • the long afterglow material has a high trap concentration and a moderate trap depth, so that the electrons trapped by the electron trap after excitation can escape the trap back-excitation light with a certain probability, and the afterglow illumination can be made to last for several hours.
  • At least one embodiment of the present invention provides a method of fabricating a lighting device, forming a light source and a corresponding luminescent coating on a substrate, and causing the light source to emit light having a wavelength less than a wavelength at which the luminescent coating is excited to emit light.
  • the light emitted by the light source excites the luminescent coating to emit light.
  • a light source is formed on the substrate, and since the illumination device of the present embodiment emits light, the light-emitting surface of the light source is directed away from the substrate.
  • the light source may be a blue OLED light source, and the blue OLED may be fluorescent light or phosphorescent light emitting, and may be a single light emitting layer structure of a common structure, a multi light emitting layer structure, or a stacked structure in which a plurality of cells are connected in series.
  • the organic layer material in the light source may be a small molecule or a polymer; the way of fabricating the OLED structure is, for example, vacuum thermal evaporation, inkjet printing, spin coating or
  • the electrode of the OLED structure may be one of metals such as Ag, Mg, and A1, or an alloy thereof, or may be a conductive metal oxide such as indium tin oxide or tin oxide.
  • the luminescent coating does not completely cover the light exiting surface of the light source.
  • the luminescent coating is formed by spin coating, jet printing or screen printing in a corresponding area of the light exit surface of the light source.
  • At least another embodiment of the present invention also provides a structure of an illumination device that emits light, as in the case of white light.
  • the illumination device includes a substrate 210, a luminescent coating over the substrate 210, and a blue light source 220 over the luminescent coating.
  • the luminescent coating is: a green luminescent coating 231 and a red luminescent coating 232.
  • the light-emitting surface of the blue light source 220 faces the green light-emitting coating 231 and the red light-emitting coating 232, and the green light-emitting coating 231 and the red light-emitting coating 232 are incomplete.
  • the light emitting surface of the blue light source 220 is covered. If it is not necessary to emit white light, only the green light-emitting coating 231 and the red light-emitting coating 232 are illuminated, and the green light-emitting coating 231 and the red light-emitting coating 232 can completely cover the light-emitting surface of the blue light source 220. Since the luminescent coating is between the substrate and the light source, i.e., the illumination device is bottom-emitting, the substrate 210 is a transparent substrate. The transparent substrate is capable of permeable to light.
  • a plurality of structures for uniformly mixing the light may be disposed in the transparent substrate, and the structure for uniformly mixing the light may be similar to the liquid crystal display device.
  • a light mixing layer may also be separately formed on the side of the transparent substrate facing the luminescent coating or facing away from the luminescent coating.
  • an encapsulation layer 240 may also be provided over the blue light source 220.
  • 4 is a schematic structural view of a lighting device according to at least one embodiment of the present invention. As shown in Fig. 4, in order to emit white light, the luminescent coating may also replace the green luminescent coating 231 and the red luminescent coating 232 with a yellow luminescent coating 233.
  • the luminescent coating in order to continue to provide a light source after the breakpoint, has a long afterglow property, and may be, for example, a silicate or an alumina which includes ions doped with rare earth (such as Eu, Sm or Ce). a salt or carbonate; or a silicate, aluminate or carbonate doped with a transition metal (Cu or Mn, etc.), or any combination thereof.
  • the luminescent coating may have a thickness of 0.5 to 100 ⁇ m.
  • the real The principle of illumination of the embodiment is the same as that of the above embodiment of the present invention, and details are not described herein again.
  • At least another embodiment of the present invention provides a method of fabricating a lighting device, forming a light source and a corresponding luminescent coating on a substrate, and causing the light source to emit light at a wavelength less than that emitted by the luminescent coating. At a wavelength, the light emitted by the light source excites the luminescent coating to emit light.
  • a luminescent coating having a long afterglow characteristic is formed on a transparent substrate, for example, by spin coating, jet printing or screen printing in a corresponding region of the transparent substrate.
  • a light source is formed over the luminescent coating such that the light exiting surface of the light source faces the luminescent coating.
  • the light source may be a blue OLED light source, and the blue OLED may be a fluorescent light emitting device or a phosphorescent light emitting device, and may be a single light emitting layer structure of a common structure, a multi light emitting layer structure, or a stacked structure in which a plurality of cells are connected in series;
  • the organic layer material may be a small molecule or a polymer; the method for fabricating the OLED structure is, for example, vacuum thermal evaporation, inkjet printing, spin coating or mixing in the above manner; the electrodes of the OLED structure may be Ag, Mg, A1, etc.
  • One type of metal, or an alloy thereof, may also be a conductive metal oxide such as indium tin oxide or tin oxide.
  • High-energy short-wavelength light excites light with a longer energy wavelength, photons are generated by photons, because the wavelength becomes longer, so called down-conversion), and the light source that emits short-wavelength light emits light to emit long-wavelength light.
  • the long afterglow luminescent coating emits light, and the luminescent coating that is excited in the absence of a power source can continue to illuminate for a period of time, achieving emergency lighting in the event of a power failure.
  • the illumination device provided by some embodiments of the present invention is a white light illumination device, but the invention is not limited to a white light illumination device.
  • Other embodiments can be obtained by changing the illuminating coating of the source and the long afterglow characteristics to mix the two to produce different chromatic colors, or to illuminate the luminescent coating by the source to produce different chromatic colors.

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  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
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  • Electroluminescent Light Sources (AREA)

Abstract

一种照明装置,包括:衬底(110,210)、位于所述衬底(110,210)上的光源(120,220)以及发光涂层(131,132,133,231,232,233)。所述光源(120,220)发出光的波长小于所述发光涂层(131,132,133,231,232,233)被激发后发出光的波长,所述光源(120,220)发出的光激发发光涂层(131,132,133,231,232,233)发光,所述发光涂层(131,132,133,231,232,233)为长余辉特性的材料。所述照明装置实现了在没有电源情况下的应急照明。

Description

照明装置及其制作方法 技术领域
本发明的实施例涉及一种照明装置及其制作方法。 背景技术
有机发光二极管 (OLED)可以容易地在平面衬底和柔性衬底上制成平面 或曲面光源, 具有低能耗等优点, 能够替代釆用点光源、 线光源以及导光板、 扩散膜来制作面光源的技术。
实现白色面光源的方式包括混合红光、 绿光及蓝光 (RGB)或者混合黄光 和蓝光 (YB)来得到白光。 为了产生 R、 G、 B或 Y、 B光, 可以釆用发出这 些颜色光的 OLED单元, 各 OLED单元发出的光混合后产生白光。还可以釆 用发出短波长光的 OLED单元, 使发出短波长的光激发发光层, 使发光层发 出长波长的光, 这些长波长的光再混合形成白光。 如蓝色的 OLED发出的蓝 光激发红光发光涂层和绿光发光涂层, 分别产生红光和绿光, 这些红光和绿 光再与蓝光混合产生白光; 或蓝色的 OLED发出的蓝光激发黄光发光涂层, 以产生黄光, 该黄光再与蓝光混合产生白光。 上述激发的工作原理为: 高能 量短波长的光激发出较低能量且波长较长的光, 用光子产生光子。
但是上述 OLED发光源在断电的情况下无法再继续发光, 因此无法实现 应急照明。 发明内容
本发明至少一个实施例提供一种照明装置及其制作方法, 能够实现在无 电源情况下的应急照明。
本发明至少一个实施例提供了一种照明装置, 包括: 衬底、 位于所述衬 底上的光源以及发光涂层。 所述光源发出光的波长小于所述发光涂层被激发 后发出光的波长, 所述光源发出的光激发发光涂层发光, 所述发光涂层为长 余辉特性的材料。
在一个实施例中, 所述光源位于所述衬底之上, 所述发光涂层位于所述 光源之上, 所述光源的出光面面向所述发光涂层。
在一个实施例中, 该照明装置还包括位于所述发光涂层之上的透明封装 层。
在一个实施例中, 所述发光涂层位于所述衬底之上, 且所述衬底为透明 衬底, 所述光源位于所述发光涂层之上, 所述光源的出光面面向所述发光涂 层。
在一个实施例中, 该照明装置还包括位于所述发光涂层之上的封装层。 本发明至少一个实施例还提供了一种照明装置制作方法, 所述方法包括 在衬底上形成光源及发光涂层。 所述光源发出光的波长小于所述发光涂层被 激发后发出光的波长, 所述光源发出的光激发发光涂层发光, 所述发光涂层 为长余辉特性的材料。
在一个实施例中, 在所述衬底上形成所述光源, 使所述光源的出光面背 离所述衬底; 在所述光源的出光面上形成所述发光涂层。 形成透明封装层。
在一个实施例中, 该方法包括: 在所述衬底上形成所述发光涂层, 所述 衬底为透明衬底; 在所述发光涂层之上形成光源, 使所述光源的出光面面向 所述发光涂层。
在一个实施例中, 该方法在所述发光涂层之上形成光
述光源之上形成封装层。 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 简单地介绍,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是本发明实施例的一种照明装置结构示意图;
图 2是本发明实施例的一种照明装置结构示意图;
图 3是本发明另一实施例的一种照明装置结构示意图;
图 4是本发明另一实施例的一种照明装置结构示意图。 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。
本发明的至少一个实施例提供的照明装置包括: 衬底、 位于所述衬底上 的光源以及具有长余辉特性的发光涂层。 所述光源发出光的波长小于所述发 光涂层被激发后发出光的波长, 所述光源发出的光激发发光涂层发光。 由于 发光涂层为长余辉材料, 因此在无电源情况下也能应急发光。 下面结合附图 和实施例, 对本发明的具体实施方式作进一步详细描述。 以下实施例用于说 明本发明, 但不用来限制本发明的范围。
图 1是本发明至少一实施例的一种照明装置结构示意图, 以顶出光的白 光照明装置为例, 可以釆用蓝色光源 (可以是蓝光 OLED, 其蓝光波长小于 450nm )来激发绿光发光涂层和红光发光涂层, 以分别发出绿光(波长为 530 〜 580nm )和红光(波长为 600〜 650nm ) , 被激发出的绿光和红光再与蓝色 光源发出的蓝光混合得到白光。 如图 1所示, 该照明装置包括衬底 110, 和 包括位于所述衬底 110之上的蓝色光源 120及位于蓝色光源 120之上的发光 涂层。 该发光涂层为: 绿光发光涂层 131和红光发光涂层 132。 为了激发红、 绿色光,蓝色光源 120的出光面面向绿光发光涂层 131和红光发光涂层 132。 为了能混合出白光, 绿光发光涂层 131和红光发光涂层 132不完全覆盖蓝色 光源 120的出光面。 若不需要发出白光, 只激发绿光发光涂层 131和红光发 光涂层 132发光, 绿光发光涂层 131和红光发光涂层 132也可以完全覆盖蓝 色光源 120的出光面。
为了保护绿光发光涂层 131和红光发光涂层 132并能够出光, 还包括位 于绿光发光涂层 131和红光发光涂层 132之上的透明封装层 140。 该透明封 装层 140能够使光能够透出。 在一个实施例中, 在透明封装层 140中还可以 设置若干使光均匀混合的结构, 该使光均匀混合的结构可以为类似于液晶显 示装置背光源的导光板中的混光结构。 在本发明的至少一个实施例中, 也可 以在透明封装层 140面向发光涂层或背离发光涂层的一侧单独制作一个混光 层。
图 2是本发明至少一实施例的一种照明装置结构示意图。 如图 2所示, 为发出白光, 发光涂层还可以将绿光发光涂层 131和红光发光涂层 132替换 为黄光发光涂层 133。
本发明的至少一个实施例中, 为了达到断点后能够继续提供光源, 发光 涂层为长余辉特性的材料,例如可以为包括掺杂稀土(如: Eu、 Sm或 Ce等) 离子的硅酸盐、 铝酸盐或碳酸盐; 或者为掺杂过渡金属(Cu或 Mn等) 离子 的硅酸盐、 铝酸盐或碳酸盐, 或它们的任意组合。
本发明的至少一个实施例中,发光涂层太薄, 激发出的红绿光(或黄光) 少, 红绿光太弱, 若发光涂层太厚, 红绿光(或黄光) 穿透路径太长, 最终 穿透的光也很弱。 例如, 发光涂层厚度可以为 0.5 ~ 100μηι。
在上述长余辉材料中, 由于在稀土或者在材料的能隙中形成低于导带的 浅电子陷阱,蓝色波段的光可将电子激发至导带,然后电子弛豫到陷阱能级, 并随后从陷阱能级弛豫到价带, 形成低于激发波长的长波长发光。 选择具有 不同能级的掺杂离子, 以及带隙的主体, 可形成红色、 绿色或黄色的受激发 光。对于掺杂离子能级形成的浅电子陷阱,受激后弛豫到该陷阱能级的电子, 需要一定的受激能量才能脱出陷阱并弛豫回能量较低的基态, 在无其它激发 能量的情况下, 靠热振动, 以一定的几率跃迁回基态, 因而形成持续一段时 间的发光, 这段时间的发光是在无外界光电激发的情况下产生的, 也就是常 说的余辉。 长余辉材料具有较高的陷阱浓度以及适中的陷阱深度, 使得激发 后被电子陷阱俘获的电子以一定的几率脱出陷阱退激发光, 可以使得的余辉 发光可持续数小时。
本发明至少一实施例提供一种制作照明装置的方法, 在衬底上形成光源 及相应的发光涂层, 并使所述光源发出光的波长小于所述发光涂层被激发后 发出光的波长, 所述光源发出的光激发发光涂层发光。
在衬底上形成光源, 由于本实施例的照明装置是顶出光, 因此使光源的 出光面背离衬底。 光源可以为蓝色的 OLED光源,蓝色的 OLED可以是荧光 发光或磷光发光,可以是普通结构的单发光层结构,也可以是多发光层结构, 或者是多个单元串接的堆叠结构。 该光源中的有机层材料可以是小分子, 或 者聚合物; 制作 OLED结构的方式例如是真空热蒸镀、 喷墨打印、 旋涂或者 上述方式的混合; OLED结构的电极可以为 Ag、 Mg、 A1等金属的一种, 或 其合金, 也可以是氧化铟锡, 氧化辞锡等导电金属氧化物。 发光涂层不完全覆盖光源的出光面。 例如, 通过在光源出光面相应的区域旋 涂、 喷印或丝网印刷方式形成发光涂层。 本发明的一些实施例提供的照明装置在无电源的情况下能够在一段时间 内持续发光, 实现了断电时的应急照明。
本发明至少再一实施例还提供了一种底出光的照明装置的结构, 同样以 发白光为例。 如图 3所示, 该照明装置包括衬底 210, 位于衬底 210之上的 发光涂层及位于发光涂层之上的蓝色光源 220。 该发光涂层为: 绿光发光涂 层 231和红光发光涂层 232。 为了激发红绿色光, 且能混合出白光, 蓝色光 源 220的出光面面向绿光发光涂层 231和红光发光涂层 232, 且绿光发光涂 层 231和红光发光涂层 232不完全覆盖蓝色光源 220的出光面。 若不需要发 出白光, 只激发绿光发光涂层 231和红光发光涂层 232发光, 绿光发光涂层 231和红光发光涂层 232也可以完全覆盖蓝色光源 220的出光面。 由于发光 涂层在衬底和光源之间, 即该照明装置是底部出光, 因此衬底 210为透明衬 底。 该透明衬底能够使光能够透出, 在本发明的至少一个实施例中在透明衬 底中还可以设置若干使光均匀混合的结构, 该使光均匀混合的结构可以为类 似于液晶显示装置背光源中的导光板中的混光结构。 在本发明的至少一个实 施例中, 也可以在透明衬底面向发光涂层或背离发光涂层的一侧单独制作一 个混光层。
为了保护蓝色光源 220, 蓝色光源 220之上还可以提供封装层 240。 图 4是本发明至少再一实施例的一种照明装置结构示意图。如图 4所示, 为发出白光, 该发光涂层还可以将绿光发光涂层 231和红光发光涂层 232替 换为黄光发光涂层 233。
本实施例中, 为了达到断点后能够继续提供光源, 发光涂层为长余辉特 性的材料, 例如可以为包括掺杂稀土(如: Eu、 Sm或 Ce等)离子的硅酸盐、 铝酸盐或碳酸盐; 或者为掺杂过渡金属(Cu或 Mn等) 离子的硅酸盐、 铝酸 盐或碳酸盐, 或它们的任意组合。 该发光涂层厚度可以为 0.5 ~ 100μπι。 该实 施例的发光原理和本发明的上述实施例相同, 此处不再赘述。
本发明至少再一实施例提供一种制作照明装置的方法, 在衬底上形成光 源及相应的发光涂层, 并使所述光源发出光的波长小于所述发光涂层被激发 后发出光的波长, 所述光源发出的光激发发光涂层发光。
在透明衬底上形成具有长余辉特性的发光涂层, 例如通过在透明衬底相 应的区域旋涂、 喷印或丝网印刷方式形成发光涂层。
在发光涂层之上形成光源, 使光源的出光面面向发光涂层。 光源可以为 蓝色的 OLED光源,蓝色的 OLED可以是荧光发光或磷光发光, 可以是普通 结构的单发光层结构, 也可以是多发光层结构, 或者是多个单元串接的堆叠 结构; 其中的有机层材料可以是小分子, 或者聚合物; 制作 OLED结构的方 式例如是真空热蒸镀、 喷墨打印、 旋涂或者上述方式的混合; OLED结构的 电极可以为 Ag、 Mg、 A1等金属的一种, 或其合金, 也可以是氧化铟锡, 氧 化辞锡等导电金属氧化物。 本发明的一些实施例提供的照明装置是利用长余辉材料的下转换特性
(用高能量短波长的光激发出较低能量波长较长的光, 用光子产生光子, 因 为波长变长, 因此称为下转换) , 釆用发出短波长光的光源发光激发发出长 波长光的长余辉发光涂层发光, 在无电源的情况下被激发的发光涂层能够在 一段时间内持续发光, 实现了断电时的应急照明。
本发明一些实施例提供的照明装置是白光照明装置, 但是本发明不限于 白光照明装置。 只要改变光源及长余辉特性的发光涂层使两者混合产生不同 的色光,或由光源激发发光涂层产生不同的色光,就可以得到其他的实施例。
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。
本申请要求于 2013年 10月 18日递交的中国专利申请第 201310492795.8 号的优先权, 在此全文引用上述中国专利申请公开的内容以作为本申请的一 部分。

Claims

权利要求书
1、 一种照明装置, 包括: 衬底、 位于所述衬底上的光源以及发光涂层, 其中,所述光源发出光的波长小于所述发光涂层被激发后发出光的波长, 所述光源发出的光激发发光涂层发光, 所述发光涂层为长余辉特性的材料。
2、 如权利要求 1所述的照明装置, 其中, 所述光源位于所述衬底之上, 所述发光涂层位于所述光源之上, 所述光源的出光面面向所述发光涂层。
3、如权利要求 2所述的照明装置,还包括位于所述发光涂层之上的透明 封装层。
4、如权利要求 1所述的照明装置, 其中, 所述发光涂层位于所述衬底之 上, 且所述衬底为透明衬底, 所述光源位于所述发光涂层之上, 所述光源的 出光面面向所述发光涂层。
5、如权利要求 4所述的照明装置,还包括位于所述发光涂层之上的封装 层。
6、 如权利要求 1~5 中任一项所述的照明装置, 其中, 所述发光涂层包 括掺杂稀土离子的硅酸盐、 铝酸盐或碳酸盐或它们的任意组合; 或者包括掺 杂过渡金属离子的硅酸盐、 铝酸盐或碳酸盐或它们的任意组合。
7、 如权利要求 1~6 中任一项所述的照明装置, 其中, 所述发光涂层的 厚度为 0.5 ~ 100μπι。
8、 如权利要求 \〜Ί 中任一项所述的照明装置, 其中, 所述光源为蓝色
OLED光源, 所述发光涂层包括红光发光涂层和绿光发光涂层。
9、 如权利要求 \〜Ί 中任一项所述的照明装置, 其中, 所述光源为蓝色 OLED光源, 所述发光涂层为黄光发光涂层。
10、 一种照明装置制作方法, 包括:
在衬底上形成光源及发光涂层,
其中使所述光源发出光的波长小于所述发光涂层被激发后发出光的波 长, 所述光源发出的光激发发光涂层发光, 所述发光涂层为长余辉特性的材 料。
11、 如权利要求 10所述的照明装置制作方法, 其中,
在所述衬底上形成所述光源, 使所述光源的出光面背离所述衬底; 在所述光源的出光面上形成所述发光涂层。
12、 如权利要求 11所述的照明装置制作方法, 其中, 通过旋涂、 喷印或 丝网印刷方式在所述光源的出光面上形成所述发光涂层。
13、如权利要求 11所述的照明装置制作方法, 形成发光涂层之后,还包 括在所述发光涂层之上形成透明封装层。
14、 如权利要求 10所述的照明装置制作方法, 其中,
在所述衬底上形成所述发光涂层, 所述衬底为透明衬底;
在所述发光涂层之上形成光源,使所述光源的出光面面向所述发光涂层。
15、 如权利要求 14所述的照明装置制作方法, 其中, 通过旋涂、 喷印或 丝网印刷方式在所述衬底上形成所述发光涂层。
16、如权利要求 14所述的照明装置制作方法,在所述发光涂层之上形成 光源之后还包括在所述光源之上形成封装层。
17、 如权利要求 10~16中任一项所述的照明装置制作方法, 其中, 所述 发光涂层包括掺杂稀土离子的硅酸盐、 铝酸盐或碳酸盐或它们的任意组合; 或者包括掺杂过渡金属离子的硅酸盐、 铝酸盐或碳酸盐或它们的任意组合。
18、 如权利要求 10~17中任一项所述的照明装置制作方法, 其中, 所述 发光涂层的厚度为 0.5〜 100μηι。
19、 如权利要求 10~18中任一项所述的照明装置制作方法, 其中, 所述 光源为蓝色光源, 所述发光涂层包括红光发光涂层和绿光发光涂层; 或者所 述光源为蓝色光源, 所述发光涂层为黄光发光涂层。
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