KR102054759B1 - SSPA Driven Plasma Lamp System - Google Patents

Abstract

The present invention relates to a plasma lamp system and, more specifically, to a semiconductor drive plasma lamp system, which realizes miniaturization and efficiency improvement of a device by generating RF energy using a semiconductor device of a 2.4 GHz band and by applying the generated RF energy to a resonator through a coaxial structure. According to the present invention, the semiconductor drive plasma lamp system (100) comprises: a semiconductor oscillation unit (110) consisting of semiconductor elements and generating microwaves of the 2.4 GHz band; a coaxial cable (120) to transmit the microwaves generated by the semiconductor oscillation unit (110); a resonator (130) resonating the microwaves transmitted from the semiconductor oscillation unit (110); and a plasma lamp (140) provided outside the resonator (130) to emit light by resonated microwaves. The system further includes: a coaxial connector (150) which is provided outside the resonator (130) and to which the coaxial cable (120) is connected; a feeder (160) supplying the microwaves transmitted through the coaxial connector (150) into the resonator (130); a lamp holder (170) provided inside the resonator (130) and extending to the plasma lamp (140) outside the resonator (130) to apply the resonated microwaves to the plasma lamp (140); a reflector (180) reflecting the light emitted from the plasma lamp (140) and transmitting the same forward; and a grill (190) focusing an electric field on the plasma lamp (140).

Description

Semiconductor Driven Plasma Lamp System {SSPA Driven Plasma Lamp System}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a semiconductor driving plasma lamp system, which generates RF energy using a 2.4 GHz band semiconductor device and applies the generated RF energy to the resonator in a coaxial structure. A drive plasma lamp system.

In general, a plasma lamp uses microwaves as an energy source, and a buffer gas filled in an electrodeless lamp by an electric field formed by microwaves generated from a magnetron ( It is a device that can provide excellent light quantity without electrode by making metal gas continuously emit light while making buffer gas) into plasma state. It has longer lamp life and better lighting effect than incandescent and fluorescent lamps. In addition to large buildings such as buildings, as well as residential buildings, such as ordinary houses or apartments, and street lamps on the road, wherever the lighting needs to be applied to a variety of applications, the frequency of their use has recently increased.

Korean Patent No. 10-0831210 discloses a case having a reflection plate and a high voltage generator provided at one side of the case space to apply a high voltage, and a microwave having a high frequency at a high voltage applied by the high voltage generator. A magnetron, a waveguide connected to one side of the magnetron to guide the microwaves generated from the magnetron, a resonator configured to form a resonance mode by the guided microwaves in communication with the waveguide, and installed inside the resonator It comprises a lamp module consisting of an electrodeless light bulb for generating a, wherein one side of the case is formed with a through hole communicating the reflecting plate and the case, the resonator of the lamp module is coupled to the through hole coupled to the high voltage generator And the magnetron is located outside of the case Are described with respect to an electrodeless lighting system street lamp is applied, characterized in that.

In case of using a magnetron that oscillates in the 2.4GHz band, the waveguide should be used to deliver RF energy to the resonator. .

Therefore, if the frequency used is low or high power system of 2.4 GHz band, the structure of feeding microwaves to the resonator using waveguides uses the same frequency even though the output is lowered, so that the physical frequency of the system is independent of the output. There is little change in phosphorus size. As a result, there is a problem that the weight and size are much larger than other structures showing the same output, and there are many difficulties in implementing the miniaturization system required in the low power system.

In addition, the magnetron oscillating the frequency of the 2.4GHz band is optimized for high power, when the RF energy of less than 300W, the RF conversion efficiency is much lowered when the oscillation of the overall system is a major cause of degradation.

The present invention has been made to solve the problems of the prior art, there is an object to generate RF energy using a 2.4GHz band semiconductor device and to apply the generated RF energy to the resonator in the coaxial form.

In addition, the present invention has another object to improve the RF conversion efficiency and easier system control than the conventional magnetron oscillation method.

In addition, the present invention has a further object that can be applied to applications such as street lights, plant growth, etc. by configuring a semiconductor driving plasma lamp system on a compact scale.

The semiconductor driving plasma lamp system of the present invention for achieving the above object is a semiconductor oscillation unit consisting of a semiconductor element for generating a microwave in the 2.4GHz band; A coaxial cable for transmitting microwaves generated by the semiconductor oscillator; A resonator resonating the microwaves transmitted from the semiconductor oscillator; And a plasma lamp provided outside the resonator and emitting light by resonant microwaves, the coaxial connector being provided outside the resonator and to which the coaxial cable is connected. A feeder for supplying microwaves transmitted through the coaxial connector into the resonator; A lamp holder provided inside the resonator and extending to the plasma lamp outside the resonator to apply resonant microwaves to the plasma lamp; A reflector for reflecting the light emitted from the plasma lamp and forwarding the light; And a grill for focusing an electric field on the plasma lamp. It characterized in that it further comprises.

In addition, the plasma lamp has a spherical or cylindrical shape, it is characterized in that it is fixed to be located between the lower lamp holder and the upper grill.

In addition, the plasma lamp is supported on the lower side by the lamp holder, it is characterized in that fixed to the upper side of the lamp holder using a ceramic adhesive.

In order to prevent deformation even in a high temperature plasma state, a ceramic adhesive is used, and also serves to favor the initial lighting of the plasma lamp.

At this time, the thickness of the ceramic adhesive is to be 1mm or less.

In addition, in order to disperse heat generated in the plasma lamp and minimize heat transfer to the feeder, the feeder and the lamp holder are separated from each other.

The feeder may be physically connected to an internal conductor of the coaxial connector to receive microwaves.

Accordingly, the semiconductor driving plasma lamp system of the present invention generates RF energy using a 2.4 GHz band semiconductor device and applies the generated RF energy to the resonator in a coaxial form, thereby reducing the size of the entire lighting system. Compared to the magnetron oscillation method, the RF conversion efficiency is higher and the system is easier to control.

In addition, the present invention has an effect that can be applied to applications such as street lights, plant growth, etc. by configuring a plasma lamp system on a compact scale.

1 is a view schematically showing the configuration of a semiconductor driving plasma lamp system according to an embodiment of the present invention,
FIG. 2 is a diagram illustrating a detailed cross section of a part of a semiconductor driving plasma lamp system according to an exemplary embodiment of the present invention.

The terms or words used in this specification and claims are not to be construed as limiting in their usual or dictionary meanings, and the inventors may appropriately define the concept of terms in order to best explain their invention in the best way possible. Based on the principle that the present invention should be interpreted as meaning and concept corresponding to the technical idea of the present invention.

Therefore, the embodiments described in the specification and the drawings shown in the drawings are only the most preferred embodiment of the present invention and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view schematically showing the configuration of a semiconductor driving plasma lamp system according to an embodiment of the present invention, Figure 2 (a), (b) is a semiconductor driving plasma lamp system according to an embodiment of the present invention A diagram showing detailed cross sections for some configurations, where (a) is a top plan view of the plasma lamp system and (b) is a side cross sectional view of the plasma lamp system with respect to cross section A-A 'of (a).

As shown in Figs. 1 and 2, the semiconductor driving plasma lamp system 100 of the present invention comprises a semiconductor oscillation unit 1010 composed of semiconductor elements and generating microwaves in the 2.4 GHz band; A coaxial cable 120 for transmitting microwaves generated by the semiconductor oscillator 110; A resonator 130 which resonates the microwaves transmitted from the semiconductor oscillator 110; And a plasma lamp 140 provided outside the resonator 130 and emitting light by the resonant microwaves.

In addition, the coaxial connector 150 is provided on the outside of the resonator 130 is connected to the coaxial cable 120; A feeder 160 for supplying microwaves transmitted through the coaxial connector 150 into the resonator 130; A lamp holder 170 provided inside the resonator 130 and extending to the plasma lamp 140 outside the resonator 130 to apply resonant microwaves to the plasma lamp 140; A reflector 180 which reflects the light emitted from the plasma lamp 140 and sends it to the front; And a grill 190 for focusing the electric field on the plasma lamp 140. It is configured to further include.

 The semiconductor oscillator 110 includes a semiconductor device (SSPA) and generates microwaves in the 2.4 GHz band to be transmitted to the resonator 130 through the coaxial cable 120.

The semiconductor oscillator 110 may include a low power amplifier such as a solid state power amplifier (SSPA), and the SSPA is formed of an integrated circuit (IC) or a transistor instead of a vacuum tube (TWT).

The coaxial cable 120 serves as a transmission path for transmitting microwaves oscillated by the semiconductor oscillator 110 to the resonator 130, and is connected to the coaxial connector 150 provided outside the resonator 130.

In the case of using a conventional magnetron as an oscillation device, a waveguide must be used to transmit RF energy to the resonator, but in the present invention, since the microwave is transmitted to the resonator 130 through the semiconductor oscillator l10 and the coaxial cable 120 The lamp system 100 including the resonator 130 may be configured as a semiconductor driving plasma lamp system on a compact scale.

The resonator 130 resonates microwaves transmitted from the semiconductor oscillator 110 to concentrate energy.

Plasma lamp 140 is provided on the outside of the resonator 130, unlike the prior art, a lamp designed based on the RF input power is applied.

Plasma lamp 140 has a spherical or cylindrical shape, is located between the lower lamp holder 170 and the upper grill 190, the lower side is supported by the lamp holder 170, but the lamp holder using a ceramic adhesive It is fixed to the upper side of (170).

In order to prevent deformation even in a high temperature plasma state, a ceramic adhesive was used, and also serves to favor the initial lighting of the plasma lamp 140, wherein the thickness of the ceramic adhesive layer is preferably 1 mm or less.

The coaxial connector 150 is a terminal portion to which the coaxial cable 120 is connected and receives microwaves transmitted through the coaxial cable 120. The microwaves thus transmitted are transmitted to the feeder 160. In this case, the coaxial connector 150 is provided with an inner conductor 155 and the feeder 160 is physically connected to the inner conductor 155 to receive microwaves.

The feeder 160 is provided inside the resonator 130, and supplies microwaves transmitted through the coaxial connector 150 into the resonator 130.

The lamp holder 170 is provided inside the resonator 130 but extends to the lower side of the plasma lamp 140 outside the resonator 130 to be connected to the lower side of the plasma lamp 140, and is transmitted from the feeder 160. Acts as a coupling to deliver the RF energy (resonant microwave) to the plasma lamp 140.

The length and diameter of the lamp holder 170 may be appropriately adjusted to a predetermined value to concentrate the RF energy on the plasma lamp 140.

Meanwhile, in order to disperse heat generated in the plasma lamp 140 and minimize heat transfer to the feeder 160, the feeder 160 and the lamp holder 170 are separated from each other and provided.

The feeder 160 is introduced into the resonator 130 in parallel with the lamp holder 170 to apply microwaves to the lamp holder 170.

The feeder 160 may be made of brass, copper, or aluminum, and the lamp holder 170 may be made of brass or pure copper.

The feeder 160 and the lamp holder 170 may be fastened by screwing into one side of the resonator 130, respectively.

The reflector 180 serves as a reflector to reflect the light emitted from the plasma lamp 140 and send it to the front to form the shape of the desired light. The reflector 180 deposits aluminum or silver on the surface thereof, or has a reflectance of 95%. It is formed by attaching the above-mentioned high illuminance reflecting plate.

The grill 190 is grounded to the reflector 180 or the lamp holder 170 to focus the electric field on the plasma lamp 140.

Although the present invention has been shown and described with reference to the preferred embodiments as described above, it is not limited to the above embodiments and those skilled in the art without departing from the spirit of the present invention. Various changes and modifications will be possible.

110: semiconductor oscillation unit 120: coaxial cable
130: resonator 140: plasma lamp
150: coaxial connector 155: internal conductor
160: feeder 170: lamp holder
180: reflector 190: grill

Claims (5)

In the plasma lamp system,
A semiconductor oscillation unit (l10) consisting of semiconductor elements and generating microwaves in the 2.4 GHz band;
A coaxial cable (120) for transmitting microwaves generated by the semiconductor oscillator (110);
A resonator (130) for resonating microwaves transmitted from the semiconductor oscillator (110); And,
A plasma lamp 140 provided outside the resonator 130 to emit light by resonant microwaves;
A coaxial connector (150) provided outside the resonator (130) to which the coaxial cable (120) is connected;
A feeder 160 that is physically connected to the inner conductor 155 of the coaxial connector 150 and supplies microwaves transmitted through the coaxial cable 120 into the resonator 130;
A lamp holder (170) provided inside the resonator (130) and connected to a lower side of the plasma lamp (140) outside of the resonator (130);
A reflector 180 for reflecting the light emitted from the plasma lamp 140 and forwarding the light; And
A grill 190 connected to the lamp holder 170 or the reflector 180 to focus an electric field on the plasma lamp 140; Including;
The plasma lamp 140 is fixed to the upper side of the lamp holder 170 using a ceramic adhesive having a thickness of 1mm or less,
The feeder 160 is formed in a ring structure, and is formed to extend a predetermined length parallel to the length direction of the lamp holder 170 while enclosing the lamp holder 170 inwardly.
The lamp holder (170) is a semiconductor driving plasma lamp system (100), characterized in that for acting as a coupling to receive the microwave from the feeder (160) to transmit to the plasma lamp (140).


delete delete delete delete

Images