JP2005276658A - Lighting system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting system utilizing discharge plasma that emits light in all directions, easy to achieve a predetermined spacing between a wire material and a fluorescent material, and excellent in productivity. <P>SOLUTION: The lighting system comprises: a metal rod 11; a fluorescent material 12 formed in the shape of a cylinder around the metal rod 11; a wire material 13 provided around the fluorescent material 12 with a predetermined spacing between itself and the fluorescent material surface and with a carbon film formed on the entire perimeter thereof; and a vacuum sealing body 10 in which the metal rod 11, the fluorescent material 12 and the wire material 13 are enclosed. By applying a voltage between the metal rod 11 and the wire material 13, electrons emitted from the wire material 13 collide with the fluorescent material 12 to cause light emission. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lighting device using discharge plasma.

  Conventionally, for example, an illumination device described in Patent Document 1 has been proposed as an illumination device using a field emission type electron emission source. In this illumination device, a pair of glass substrates are installed in a vacuum sealed body, an electron emission source (cathode) is provided on one glass substrate, and a phosphor is provided on the other glass substrate via a transparent electrode film (anode). The electrons emitted from the electron emission source collide with the planar phosphor, the phosphor is excited and emits light, and is diffused and reflected in the vacuum sealed body to be emitted as visible light. ing.

  However, in such a lighting device, since the electrons emitted from the electron emission source collide with the planar phosphor to emit light, light emission is limited to a certain direction. For this reason, an illuminating device that emits light from the entire surface of the vacuum sealing body is desired.

In addition, there is a problem that it is difficult to make the distance between the glass substrate provided with the electron emission source and the glass substrate provided with the phosphor a predetermined size, resulting in poor productivity.
JP-A-10-255699

  Accordingly, an object of the present invention is to solve the problem that light can be emitted to the entire surface and the distance between the wire and the phosphor can be easily set to a predetermined size.

  The lighting device of the present invention is provided with a predetermined interval between a metal rod, a phosphor formed in a cylindrical shape on the outer periphery of the metal rod, and a surface of the phosphor on the outer periphery of the phosphor. A wire rod having a carbon film formed on the periphery and a vacuum sealing body in which these metal rods, phosphors, and wire rods are enclosed, and a voltage is applied between the metal rod and the wire rod, and the wire rod is released from the wire rod. The emitted electrons collide with the phosphor and emit light.

  Examples of the wire include those extending in the axial direction and those formed in a spiral shape with a predetermined interval from the phosphor surface.

  According to the illumination device of the present invention, by applying a voltage between the metal rod and the wire, electrons emitted from the wire collide with the surface of the cylindrical phosphor, the phosphor is excited and emits light, and is vacuum sealed. Light is emitted from the entire surface of the stationary body.

  Moreover, it is the structure which has arrange | positioned the wire to the outer periphery of the cylindrical fluorescent substance, and when installing a wire, the space | interval with the outer peripheral surface of a fluorescent substance can be easily made into a predetermined magnitude | size.

  According to the present invention, light can be emitted to the entire surface, the distance between the wire and the phosphor can be easily set to a predetermined size, and the productivity is excellent.

  The best mode for carrying out the present invention will be described with reference to FIGS.

  1 is a partially broken perspective view of the lighting device, FIG. 2 is a sectional view of the lighting device, and FIG. 3 is a front view of the lighting device.

  The illuminating device is configured by enclosing a metal rod 11, a phosphor 12, and a wire 13 in a vacuum sealed body 10.

The vacuum sealing body 10 is formed of a cylindrical glass tube, and the inside is formed in a vacuum (10 ⁻⁶ Torr).

  The metal rod 11 may be a solid rod or a hollow metal tube. The material is made of aluminum, copper, Ni, SUS or the like, and the surface has an adhesiveness of the phosphor 12 and a mirror finish suitable for reflecting the light emission of the phosphor 12, for example.

  The phosphor 12 is formed in a cylindrical shape on the entire outer periphery of the metal rod 11.

  The wire 13 is made of Ni, stainless steel, Fe, or the like and has a diameter of 1 mm. Carbon nanowalls (carbon films) are formed on the entire circumference of the wire 13. Four wires 13 are extended in the axial direction, and four wires 13 are provided at equal intervals in the circumferential direction of the phosphor 12. In addition, the diameter of the wire 13 is an example and is not limited to 1 mm.

  In addition, in order to make the entire surface of the phosphor 12 emit light, the gap between the wire 13 and the phosphor 12 is increased and a high electric potential is applied, or the number of the wires 13 is increased to reduce the distance between them. Preferably, electrons are emitted.

  A spacer 14 is used to set the distance between the phosphor 12 and the wire 13 to a predetermined size. The spacer 14 is formed by bending four projecting pieces 14 b outwardly on an annular body 14 a that is externally fitted to the phosphor 12. The spacers 14 are provided on the outer peripheral surfaces of both ends of the phosphor 12, and the wire 13 is installed between the projecting pieces 14 b of the spacers 14 at both ends. Thereby, the wire 13 is arrange | positioned at predetermined intervals between fluorescent substance surfaces. The ring body 14a may be bonded to the phosphor 12.

  Further, at one end of the phosphor 12, the respective wire rods 13 are electrically connected by the conductor 15.

  The lighting device connects a pulse power supply 17 between the metal rod 11 and one end of one wire 13 via an electric wire 16, whereby a voltage is applied between the metal rod 11 and the wire 13, The emitted electrons collide with the phosphor 12 to emit light.

The emission luminance is 200,000 Cd when the pulse voltage is increased until a current of 1 mA / cm ² flows. As a condition in this case, a metal anode with a phosphor with a diameter of 2 cm and a diameter of 10 cm is formed at a distance of 3 mm on a cathode having a diameter of 10 mm and a diameter of 10 mm, and a pulse voltage of 6 kV (1 KHz) is applied under a vacuum of 10 ⁻⁶ Torr. As a result, a current of 1 mA / cm ² flowed.

  According to the illuminating device thus configured, the wire rod 13 is provided on the outer periphery of the cylindrical phosphor 12 fitted around the metal rod 11 with a predetermined gap between the phosphor surface and the metal rod. When a voltage is applied between 11 and the wire 13 and electrons emitted from the wire 13 collide with the cylindrical phosphor surface, the phosphor 12 is excited and emits light, and light is emitted from the entire surface of the vacuum sealing body. The

  Further, the wire 13 is arranged on the outer periphery of the cylindrical phosphor 12, and when the wire 13 is installed, the spacer 14 or the like is used so that the distance from the outer periphery of the phosphor 12 can be easily set to a predetermined size. Can be.

  In a light source using a field emitter, the voltage can be lowered (the emitter characteristic is 1 to 4 V / μm) as the distance between the emitter (cathode) and the phosphor side anode is narrowed accurately. Therefore, in this structure, the spacing between the cathode and the anode can be accurately controlled by inserting the spacer 14, and an efficiency of 300 lm / W was obtained at a voltage of 800 V at a spacing of 0.5 mm.

  Note that the number of the wires 13 is not limited to four, but may be one or any number of two or more.

  Further, the shape of the spacer 14 is not limited to the above structure.

  Another embodiment of the present invention will be described with reference to FIG.

  The present embodiment is characterized in that the wire 20 is formed in a spiral shape and is wound with a predetermined gap between the wire 20 and the phosphor surface. Other configurations are the same as those of the embodiment shown in FIGS. 1 to 3, and the same portions are denoted by the same reference numerals and description thereof is omitted.

  That is, the spacer 14 formed by bending one protruding piece 14b outwardly on the ring body 14a is externally fitted to both ends of the phosphor 12. A spiral wire 20 having carbon nanowalls formed on the entire circumference is wound around the phosphor 12, and both ends of the wire 20 are fixed to the protruding pieces 14 b of the spacers 14. Thereby, the wire 13 is arrange | positioned at predetermined intervals between fluorescent substance surfaces. Then, a voltage is applied between one end of the wire 20 and the metal rod 11, and electrons emitted from the wire 20 collide with the phosphor 12 to emit light.

  Even in the illumination device configured as described above, light can be emitted to the entire surface, and the distance between the wire and the phosphor can be easily set to a predetermined size.

  In addition, since the wire 20 is formed in a spiral shape and the wire 20 is arranged on the entire circumference of the phosphor 12, it is suitable for easily emitting light over the entire 360 ° range of the phosphor 12.

  The present invention is useful as a high-intensity lamp (HID lamp) such as a high-pressure mercury lamp, a metal halide lamp, or a high-pressure sodium lamp.

The partially broken perspective view of the illuminating device in embodiment of this invention Sectional drawing of the illuminating device in embodiment of this invention The front view of the illuminating device in embodiment of this invention The partially broken perspective view of the illuminating device in other embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Vacuum sealing body 11 Metal rod 12 Phosphor 13,20 Wire material

Claims (4)

A carbon film is formed all around the metal rod, a phosphor formed in a cylindrical shape on the outer periphery of the metal rod, and a predetermined interval between the phosphor surface and the phosphor surface. A lighting device comprising a wire rod and a vacuum seal that encloses the metal rod, phosphor, and wire,
A lighting device, wherein a voltage is applied between the metal rod and the wire, and electrons emitted from the wire collide with a phosphor to emit light.   The lighting device according to claim 1, wherein the wire is extended in the axial direction.   The lighting device according to claim 2, wherein a plurality of the wire rods are provided at equal intervals in the circumferential direction of the phosphor. The lighting device according to claim 1, wherein the wire is formed in a spiral shape and wound around the phosphor surface at a predetermined interval.

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