EP1691397A1 - Beleuchtungseinrichtung - Google Patents

Beleuchtungseinrichtung Download PDF

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Publication number
EP1691397A1
EP1691397A1 EP05003052A EP05003052A EP1691397A1 EP 1691397 A1 EP1691397 A1 EP 1691397A1 EP 05003052 A EP05003052 A EP 05003052A EP 05003052 A EP05003052 A EP 05003052A EP 1691397 A1 EP1691397 A1 EP 1691397A1
Authority
EP
European Patent Office
Prior art keywords
carbon fiber
anode
fiber
paper
lighting device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05003052A
Other languages
English (en)
French (fr)
Inventor
Akio Hiraki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dialight Japan Co Ltd
Original Assignee
Dialight Japan Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dialight Japan Co Ltd filed Critical Dialight Japan Co Ltd
Priority to EP05003052A priority Critical patent/EP1691397A1/de
Publication of EP1691397A1 publication Critical patent/EP1691397A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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

Definitions

  • the present invention relates to a lighting device, and more particularly to a lighting device using a field emission type electron emitter.
  • the anode is configured such that a transparent conductive film (ITO) and a phosphor are formed on a glass substrate.
  • ITO transparent conductive film
  • the present invention reduces the heat generation from the anode as much as possible and enables a uniform illumination without a diffusion plate.
  • a lighting device is provided with an electron emission cathode and an anode having a phosphor, wherein the material for the anode includes a carbon fiber.
  • the material for the anode includes a carbon fiber, whereby electrons emitted from the electron emission cathode radiate heat by the carbon fiber that is excellent in thermal conductivity, even if they collide with the anode to generate heat.
  • the carbon fiber can be used as an electrode without forming a transparent conductive film as conventionally, since the carbon fiber has conductivity.
  • the material for the anode is preferably a carbon fiber mixed paper obtained by mixing a carbon fiber into a paper material.
  • a carbon fiber mixed paper obtained by mixing a carbon fiber into a paper material as the material for the anode reduces a density compared to a conventional glass substrate and reduces the heat generation when the electrons collide with the anode, thereby being capable of reducing the heat generation at the anode.
  • a mixed paper i.e., a paper, so that it can diffuse light, which means a diffuser is not required to be provided.
  • the carbon fiber mixed paper has a glass fiber mixed therein in addition to the carbon fiber. Mixing the glass fiber allows light to uniformly be diffused. More preferably, the glass fiber knitted with or weaved with the carbon fiber is mixed into the paper material. More preferably, the phosphor is applied onto the carbon fiber mixed paper. The phosphor can easily be applied in case where the material for the anode is the mixed paper.
  • the phosphor is mixed into the paper material.
  • Mixing phosphor powders into the paper material can provide an anode material having a phosphor.
  • the tone of the light-emission can easily be adjusted by suitably selecting the mixing ratio.
  • the material for the anode is a fiber blend including the carbon fiber and the glass fiber.
  • a fiber blend including the carbon fiber and the glass fiber as the material for the anode reduces a density compared to a conventional glass substrate and reduces the heat generation when the electrons collide with the anode, thereby being capable of reducing the heat generation at the anode.
  • it is a fiber blend of the glass fiber, so that it can diffuse light, which means a diffuser is not required to be provided.
  • the fiber blend is obtained by knitting or weaving the carbon fiber and the glass fiber, whereby light-emission and heat radiation can be made uniform.
  • the phosphor is applied onto the fiber blend.
  • the phosphor can easily be applied in case where the material for the anode is the fiber blend.
  • a material including a carbon fiber, preferably a carbon fiber mixed paper is used as the material for an anode in the present invention. Therefore, electrons emitted from an electron emission cathode collide with the mixed paper having low density, whereby the heat generation is restrained. Even if the heat generation occurs, the generated heat is radiated by the carbon fiber excellent in thermal conductivity, with the result that the heat generation can be reduced at the anode.
  • the mixed paper is used, so that the emitted light is uniformly diffused.
  • the inclusion of the glass fiber further promotes the diffusion, whereby the diffuser can be omitted.
  • the carbon fiber has conductivity, so that the carbon fiber can be used as an electrode without forming a transparent conductive film as conventionally.
  • Fig. 1 is a schematic constructional view of the lighting device according to one embodiment of the present invention.
  • the lighting device 1 in this embodiment is vacuum-sealed by a glass substrate 2, side plates 3 and a sealing plate 4.
  • An electron emitter 5 made of, for example, carbon nano-tube is formed on the glass substrate 2 to compose an electron emission cathode.
  • This electron emitter 5 has a plane shape, but it may be linear as another embodiment of the present invention.
  • An anode 6 according to the present invention is arranged so as to be opposite to the glass substrate 2, keeping a predetermined space by the side plates 3.
  • the anode 6 is made of a carbon fiber mixed paper 8 obtained by mixing a fiber blend 7, which is obtained by knitting a carbon fiber and a glass fiber, into a paper material, as shown in Fig. 2. A phosphor is applied onto this carbon fiber mixed paper 8 and an electrode 9 is provided at its one end to form the anode.
  • Usable paper materials include, for example, wood pulp, non-wood pulp and wastepaper pulp.
  • the thickness of the carbon fiber and the glass fiber is preferably a micron-order, for example.
  • the mixing ratio of the carbon fiber and the glass fiber is suitably selected depending on the required nonflammability and light diffusivity.
  • phosphor powders are mixed into the paper material in advance and the fiber blend obtained by knitting the carbon fiber and the glass fiber may be mixed.
  • the tone of the light-emission can be adjusted by suitably adjusting the mixing ratio of the phosphor powders to the paper material.
  • the lighting device 1 electrons emitted from the electron emitter 5 by the application of voltage between the electron emission cathode and the anode collide with the phosphor applied onto the carbon fiber mixed paper 8, by which the phosphor emits light.
  • the anode 6 is made of the carbon fiber mixed paper 8. Therefore, it is easily formed, and further, the density is low compared to the conventional glass substrate as well as the heat generation is reduced when the electrons collide with the anode 6, thereby being capable of reducing the heat generation at the anode 6. Even if the heat generation occurs by the collision with the anode 6, the generated heat is radiated by the carbon fiber excellent in thermal conductivity, with the result that the heat generation can further be reduced.
  • a mixed paper i.e., a paper
  • it includes the glass fiber, whereby light is uniformly diffused. Consequently, it is unnecessary to provide a diffuser.
  • the carbon fiber has conductivity, thereby being used as an electrode without forming a transparent conductive film (ITO) as conventionally.
  • ITO transparent conductive film
  • the electrode density at the anode can be designed depending on the density of the carbon fiber included in the carbon fiber mixed paper 8.
  • the carbon fiber is mixed into the paper material in the aforesaid embodiment, it is not mixed into the paper material, but the carbon fiber and glass fiber are knitted or weaved to obtain a fiber blend, on which the phosphor is applied to form the anode, as another embodiment of the present invention.
  • conductive grains for example, metallic grains may be mixed into the paper material as another embodiment of the present invention. This can enhance the conductivity and thermal conductivity.

Landscapes

  • Discharge Lamps And Accessories Thereof (AREA)
EP05003052A 2005-02-14 2005-02-14 Beleuchtungseinrichtung Withdrawn EP1691397A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05003052A EP1691397A1 (de) 2005-02-14 2005-02-14 Beleuchtungseinrichtung

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP05003052A EP1691397A1 (de) 2005-02-14 2005-02-14 Beleuchtungseinrichtung

Publications (1)

Publication Number Publication Date
EP1691397A1 true EP1691397A1 (de) 2006-08-16

Family

ID=34933736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05003052A Withdrawn EP1691397A1 (de) 2005-02-14 2005-02-14 Beleuchtungseinrichtung

Country Status (1)

Country Link
EP (1) EP1691397A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479065C2 (ru) * 2010-03-29 2013-04-10 ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "Волга-Свет" (ООО "Волга-Свет") Источник света

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS609039A (ja) * 1983-06-28 1985-01-18 Ise Electronics Corp 螢光表示管
JPS60216431A (ja) * 1984-04-12 1985-10-29 Ise Electronics Corp 陽極基板およびその製造方法
EP1061554A1 (de) * 1999-06-15 2000-12-20 Iljin Nanotech Co., Ltd. Weisslichtquelle mit Kohlenstoffnanoröhren und Verfahren zur Herstellung
US20040191495A1 (en) * 2003-01-14 2004-09-30 Eberhard Lenz Composite product with a thermally stressable bond between a fiber reinforced material and a further material
EP1498931A1 (de) * 2002-04-17 2005-01-19 Alexandr Nikolaevich Obraztsov Kathodolumineszente lichtquelle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS609039A (ja) * 1983-06-28 1985-01-18 Ise Electronics Corp 螢光表示管
JPS60216431A (ja) * 1984-04-12 1985-10-29 Ise Electronics Corp 陽極基板およびその製造方法
EP1061554A1 (de) * 1999-06-15 2000-12-20 Iljin Nanotech Co., Ltd. Weisslichtquelle mit Kohlenstoffnanoröhren und Verfahren zur Herstellung
EP1498931A1 (de) * 2002-04-17 2005-01-19 Alexandr Nikolaevich Obraztsov Kathodolumineszente lichtquelle
US20040191495A1 (en) * 2003-01-14 2004-09-30 Eberhard Lenz Composite product with a thermally stressable bond between a fiber reinforced material and a further material

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 118 (E - 316) 23 May 1985 (1985-05-23) *
PATENT ABSTRACTS OF JAPAN vol. 010, no. 065 (E - 388) 14 March 1986 (1986-03-14) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 259 (E - 773) 15 June 1989 (1989-06-15) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2479065C2 (ru) * 2010-03-29 2013-04-10 ОБЩЕСТВО С ОГРАНИЧЕННОЙ ОТВЕТСТВЕННОСТЬЮ "Волга-Свет" (ООО "Волга-Свет") Источник света

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