KR20100075312A

KR20100075312A - Electrodeless lighting system

Info

Publication number: KR20100075312A
Application number: KR1020080133964A
Authority: KR
Inventors: 김정원
Original assignee: 엘지전자 주식회사
Priority date: 2008-12-24
Filing date: 2008-12-24
Publication date: 2010-07-02

Abstract

PURPOSE: An electrodeless lighting system is provided to collect light which is emitted in rear part of an electrodeless bulb by forming the outer surface to be bent. CONSTITUTION: A magnetron(300) generates microwave. A waveguide(400) has a waveguide space for transmitting the microwave generated by the magnetron. A resonator(500) is communicated with the waveguide space to resonate the microwave. An electrodeless bulb(600) is arranged in the resonator and has a luminescent material which is emitted by the microwave. A reflector(700) accommodates the resonator to reflect the light light-emitted from the electrodeless bulb.

Description

Electrodeless Lighting Equipment {ELECTRODELESS LIGHTING SYSTEM}

The present invention relates to an electrodeless lighting device that generates light using microwaves.

In general, an electrodeless lighting device transmits microwave energy generated from a microwave generator, such as a magnetron, to a resonator through a waveguide, and excites the filling material of the electrodeless bulb provided in the resonator. Is a device in which the filling gas of the electrodeless bulb is converted into a plasma state to generate light.

The electrodeless lighting device is an electrodeless bulb having no electrode or filament inside the bulb, and has a very long or semi-permanent lifespan, and emits light as natural light becomes charged by the filling material charged inside the electrodeless bulb. Will be generated.

The electrodeless lighting device is provided with a reflector made of a dielectric material so that microwaves can pass while light is reflected in the opening of the resonator as microwaves are supplied to the resonance space of the resonator. The reflector reflects light emitted to the rear side from the electrodeless bulb toward the front to improve the light efficiency of the electrodeless lighting device.

The conventional reflector as described above is manufactured by coating a reflective material on the surface of the base material of quartz. However, inside the resonator, microwaves resonate, and the light emitting material is excited in the electrodeless bulb, thereby generating considerably high heat. Therefore, when the electrodeless illuminator is used for a long time, the coating layer of the reflector may be peeled off, and thus the light efficiency of the electrodeless illuminator may be greatly reduced. In addition, there is a problem that an increase in manufacturing cost for the reflector occurs.

The present invention solves the problems of the conventional electrodeless lighting device as described above, and can reduce the manufacturing cost by eliminating the reflector and at the same time prevent the degradation of the light efficiency of the lighting device due to damage of the reflector when used for a long time. It is an object of the present invention to provide an electrodeless illumination device.

In order to achieve the object of the present invention, a magnetron for generating a microwave; A waveguide having a waveguide space for transmitting microwaves generated by the magnetron; A resonator having a resonance space in communication with the waveguide space of the waveguide to resonate the microwaves; An electrodeless bulb provided inside the resonator and having a light emitting material to emit light by microwaves; And a reflector configured to receive the resonator and reflect light emitted from the electrodeless light bulb, wherein the resonator fixing part is formed in the waveguide to fix the resonator, and the inside of the resonator fixing part emits light from the electrodeless light bulb. Provided is an electrodeless illuminator in which a reflective surface portion is formed to reflect light.

Electrodeless lighting device according to the present invention, by forming the outer surface of the waveguide facing the rear side of the electrodeless bulb to be curved, without having a separate reflector for reflecting light emitted from the electrodeless bulb to the rear side The light emitted toward the rear of the electrodeless bulb may be focused toward the front. This not only reduces the cost required to manufacture and install the reflector, but also prevents the coating surface of the reflector from being damaged due to its weakness due to the nature of the reflector when it is installed, preventing damage to the surface of the reflector. The maintenance cost of the equipment can be reduced.

Hereinafter, the electrodeless lighting device according to the present invention will be described in detail based on the embodiment shown in the accompanying drawings.

As shown in FIG. 1, the electrodeless lighting device according to the present invention includes a casing 100, a high voltage generator 200 installed inside the casing 100 to generate a high voltage, and the high voltage generator 200. The magnetron 300 to generate a microwave having a high frequency by applying a high voltage generated in the, and is installed in the inner space of the casing 100 and coupled to the magnetron 300 has a high frequency oscillated from the magnetron 300 A waveguide 400 for guiding microwaves, a resonator 500 coupled to an outlet side of the waveguide 400 to shield the external emission of microwaves to form a resonant mode, and disposed inside the resonator 500 The electrodeless light bulb 600 is provided with a light emitting material to be excited by the light emitting device, and is installed in the casing 100 to accommodate the resonator 500 to emit light from the electrodeless light bulb 600. Include a reflector 700 for focusing the light in a forward direction.

The high voltage generator 200, the magnetron 300, and the waveguide 400 are installed in the inner space of the casing 100, and the resonator 500, the electrodeless light bulb 600, and the reflecting shade are disposed outside the inner space. 700) is installed.

2 and 3, the waveguide 400 has a hexahedral portion formed of a lower plate 410 and an upper plate 420 to have a waveguide space S1 therein, and on one side of the upper plate 420. An introduction hole 421 through which the antenna portion (unsigned) of the magnetron 300 is inserted is formed, and a microwave introduced from the magnetron 300 through the introduction hole 421 on one side of the lower plate 410. Derivation slots 421 for guiding the resonator space S2 of the resonator 500 are formed therethrough. In addition, the bottom surface of the lower plate 410, that is, a portion exposed to the outside of the casing 100, the resonator fixing part 412 to which the resonator 500 is inserted and fixed is formed to protrude to a predetermined height, and the resonator height The inner surface of the government portion 412 is formed with a reflecting surface portion 413 reflecting the light emitted from the electrodeless bulb 600 to the front.

The reflective surface portion 413 may be formed flat, but may be curved to have a predetermined curvature so that the light emitted from the electrodeless light bulb 600 can be focused forward. For example, as shown in FIG. 4, the curvature r1 of the reflecting surface portion 413 is formed to have the same curvature as the curvature r2 of the inner circumferential surface of the reflector 700 fixed to the outer circumferential surface of the resonator fixing part 412. It is preferable because it can be uniformly collected.

The surface roughness of the reflective surface portion 413 reflects the light emitted from the electrodeless light bulb 600 toward the front using the reflective surface portion 413. It is desirable to form smaller than the surface.

A bulb insertion hole 414 is formed in the center of the reflective surface portion 413 so that the shaft portion 620 of the electrodeless light bulb 600 can pass therethrough. The light bulb insertion hole 414 is preferably formed to be separated from the waveguide space (S1) because the microwave can leak when formed to communicate with the waveguide space (S1).

The lead-out slot 411 is formed around the bulb insertion hole 414, that is, the reflective surface 413. As shown in FIGS. 2 to 5, the lead-out slot 411 may be formed in an arc shape during planar projection and may be formed to be inclined at a predetermined angle α with respect to the normal line of the reflective surface during front projection. The induction slot 411 is formed to be inclined so that a part of light is derived as the light emitted from the light emitting part 610 of the electrodeless light bulb 600 is reflected by the reflecting surface part 413 of the waveguide 400. This is to prevent leakage to the waveguide space S1 through the slot 411.

The lead slot 411 is preferably formed so that the inlet end, that is, the end contacting the waveguide space S1 can be closer to the introduction hole 421, the microwave can be easily guided to the resonator 500. .

The reflection shade 700 is formed in a hemispherical shape in which the front side and the rear side are opened so that the narrow side is in close contact with the outer circumferential surface of the resonator fixing part 412 of the waveguide 400. In addition, the inner circumferential surface of the reflection shade 700 is preferably formed to have a predetermined curvature r2, that is, a curvature in which light emitted from the electrodeless light bulb 600 can be focused forward.

In the drawings, reference numeral M denotes a motor for rotating the electrodeless bulb.

The electrodeless illuminator as described above is operated as follows.

That is, when a driving signal is input to the high voltage generator 200, the high voltage generator 200 boosts AC power to supply the boosted high voltage to the magnetron 300, and the magnetron 300 oscillates by the high voltage. While generating a very high frequency microwave.

The microwaves are emitted to the outside of the magnetron 300 through the antenna of the magnetron 300, and the emitted microwaves are impedance-matched by the microwave matching member (not shown) of the magnetron 300. 400).

The microwave guided to the waveguide 400 is guided and radiated into the resonator 500 through the waveguide space S of the waveguide 400, and the resonant mode is inside the resonator 500 by the radiated microwaves. Is formed. The light emitting material charged in the electrodeless light bulb 600 is excited by the resonance mode formed in the resonator 500 to emit light having a unique emission spectrum while being continuously plasmaized.

Here, as shown in FIGS. 3 and 4, among the light emitted from the light emitting unit 610 of the electrodeless light bulb 600, the light emitted toward the front is emitted as it is, while the light emitted toward the side is the reflection shade 700. B) is reflected and focused forward. In addition, the light emitted from the rear side of the electrodeless light bulb 600, that is, the upper side of the electrodeless light bulb 600 is reflected by the reflective surface portion 413 of the waveguide 400 and is focused toward the front side. At this time, the reflecting surface portion 413 of the waveguide 400 is rearward and the light emitted to the side from the electrodeless bulb 600 as its inner peripheral surface is formed with a curvature (r1 = r2) approximately the same as the reflector 700 The light emitted can be uniformly collected to improve the light efficiency of the electrodeless lighting device.

In addition, as the guide slot 411 of the waveguide 400 is inclined, the light emitted from the electrodeless bulb 600 to the rear side is guided to the waveguide space S1 of the waveguide 400 through the guide slot 411. Since leakage can be prevented, the light efficiency of the electrodeless lighting device can be further improved.

In this way, the light emitted toward the rear side of the electrodeless bulb can be focused toward the front side without having a separate reflector for reflecting the light emitted toward the rear side from the electrodeless bulb. This not only reduces the cost required to manufacture and install the reflector, but also prevents the problem caused by weakness of heat due to the characteristics of the reflector when the reflector is installed, that is, the coating surface of the reflector deteriorates and is damaged during long-term use. The maintenance cost of the electrodeless lighting device can be reduced.

The electrodeless lighting device of the present invention can be used indoors, such as a factory lighting, as well as outdoors, such as street lamps.

1 is a longitudinal sectional view showing an electrodeless illuminator of the present invention;

2 is an exploded perspective view illustrating the waveguide according to FIG. 1;

3 is a longitudinal cross-sectional view showing a part assembled in the electrodeless lighting device according to FIG.

4 is a longitudinal sectional view showing an enlarged dotted line of FIG. 3;

Figure 5 is a bottom view of the waveguide according to Figure 1;

** Description of symbols for the main parts of the drawing **

200: high voltage generator 300: magnetron

400: waveguide 410: bottom plate

411: Derivation slot 412: Resonator fixing part

413: reflecting surface portion 414: bulb insertion hole

420: top plate 421: introduction hole

500: resonator 600: electrodeless bulb

700: reflection shade S1: waveguide space

Claims

Magnetrons that generate microwaves;

A waveguide having a waveguide space for transmitting microwaves generated by the magnetron;

A resonator having a resonance space in communication with the waveguide space of the waveguide to resonate the microwaves;

An electrodeless bulb provided inside the resonator and having a light emitting material to emit light by microwaves; And

And a reflector configured to receive the resonator and reflect light emitted from the electrodeless light bulb.

A resonator fixing part is formed in the waveguide so that the resonator is fixed, and the reflecting surface portion is formed inside the resonator fixing part to reflect the light emitted from the electrodeless bulb.

The method of claim 1,

And the reflective surface portion is curved to have the same curvature as that of the reflection shade.

The method of claim 1,

And a bulb insertion hole is formed in the center of the reflective surface to allow the electrodeless bulb to pass therethrough.

The method of claim 3,

The reflective surface portion is an electrodeless lighting device is formed to be curved from the upper end of the resonator fixing portion to the bulb insertion hole.

The method of claim 1,

And the reflecting surface portion is formed with a smaller surface roughness than the outer surface of the resonator fixing part.

The method according to any one of claims 1 to 5,

The reflective surface portion is formed with a slot to communicate with the resonator space of the resonator in the waveguide space of the waveguide,

And the slot is formed to be inclined with respect to the surface of the reflective surface portion.

The method of claim 6,

And the slot is formed to be inclined such that an end communicating with the waveguide space is located closer to the magnetron.