CN102192442A - Plasma lamp - Google Patents

Abstract

The present invention provides a plasma lamp, which includes: a radio frequency driving unit connected to a direct current power supply and used to generate radio frequency electromagnetic waves; a transmitting unit connected to the radio frequency driving unit and used to transmit the radio frequency electromagnetic waves generated by the radio frequency driving unit; an electrodeless plasma bulb coupled to the transmitting unit; a radio frequency cable, through which the radio frequency driving unit and the transmitting unit are connected; a lampshade, in which the electrodeless plasma bulb is fixed, and the interior of the lampshade is a reflective layer; a light-transmitting cover connected to the lower part of the lampshade, and the light-transmitting cover is provided with a reflective or refractive pattern layer, and is used to reflect or refract the light irradiated on the reflective pattern layer. The plasma lamp provided by the present invention achieves the effects of energy saving and uniform light intensity by using a plasma bulb and providing a reflective pattern layer.

Description

Plasma lamps

technical field

The invention relates to a lamp, especially a plasma lamp. Compared with ordinary incandescent lamps or HID street lamps, this plasma lamp has lower power consumption, and this plasma lamp can achieve more brightness than LED street lamps composed of 20 to 30 LEDs through only one plasma bulb.

Background technique

Street lighting for urban roads is an important public facility, and roads of different levels have corresponding illuminance standards according to international regulations. In order to effectively illuminate the road at night, street lights are required to have sufficient power and brightness. As the grade and width of the road increase, the power and brightness of the street light source are required to be higher and higher. Therefore, people have been working hard to improve the light source and increase its brightness, and the power of the light source is also increasing accordingly. At present, the light sources of street lights have gradually developed from incandescent lamps to various new light sources such as halogen tungsten lamps, high-pressure mercury lamps, high-pressure sodium lamps, and metal halide lamps. Although these new light sources have high brightness, they also have high power and greatly increase power consumption. Recently, light-emitting diode (LED) is an electroluminescent light source. Its basic working principle is to use a solid semiconductor chip as a light-emitting material. When a voltage is applied to both ends, the carriers in the semiconductor recombine to cause photon emission to generate light. Good temperature characteristics, low power consumption and other advantages. But at present, the single power of LED is very limited. Mature products can only achieve a few watts. When it is applied to road lighting, more than 20 to 30 LEDs need to be assembled together to form a street lamp, which makes the circuit structure more complex and increases the occurrence of possibility of failure.

Contents of the invention

The object of the present invention is to provide a plasma lamp, which can achieve practical low energy consumption and achieve better lighting effects.

The present invention provides a plasma lamp, which includes: a radio frequency drive unit connected to a DC power supply for generating radio frequency electromagnetic waves; a transmitting unit connected to the radio frequency drive unit for emitting radio frequency electromagnetic wave; electrodeless plasma bulb, coupled to the transmitting unit; radio frequency cable, the radio frequency drive unit and transmitting unit are connected through the radio frequency cable; lampshade, fix the electrodeless plasma bulb to the lampshade Inside, the inside of the lampshade is a reflective layer; the light-transmitting cover is connected to the lower part of the lampshade, and the light-transmitting cover is provided with a reflection or refraction pattern layer for reflecting or refracting the light irradiated on the reflection pattern layer.

The plasma lamp provided by the invention achieves the characteristics of energy saving and uniform light intensity by using a plasma bulb and setting a reflective pattern layer.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is a circuit structure diagram of a plasma lamp in an embodiment of the present invention;

Fig. 2 is a sectional view of a partial structure of a lamp head of a plasma lamp in an embodiment of the present invention;

Fig. 3 is an enlarged view of part A in Fig. 2;

Fig. 4 is a cross-sectional view of a partial structure of a lamp cap of a plasma lamp in an embodiment of the present invention;

Fig. 5 is an enlarged view of part B in Fig. 4;

6 is a structural diagram of a radio frequency drive unit in an embodiment of the present invention;

Fig. 7 is a circuit structure diagram of a plasma lamp in an embodiment of the present invention;

Fig. 8 is a sectional view of the overall structure of the plasma lamp in the embodiment of the present invention;

9A and 9B are structural diagrams of a waterproof connection device in an embodiment of the present invention;

Fig. 10 is a cross-sectional view of a partial structure of a lamp head of a plasma lamp in an embodiment of the present invention;

Fig. 11 is a cross-sectional view of a partial structure of a lamp head of a plasma lamp in an embodiment of the present invention.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

The invention provides a plasma lamp using a plasma bulb as a light source. The plasma lamp can be applied to a standard street lamp base and adopts the latest electrodeless plasma bulb, which is powered by radio frequency electromagnetic waves. Compared with existing incandescent lamps and HID lamps, the plasma street lamp explained by the present invention has better color performance and lower energy consumption. The brightness produced by 1 plasma bulb is the same as that produced by 20 to 30 LEDs, which makes the failure of plasma street lights less likely than LED street lights composed of a large number of LED bulbs. Plasma street lights that only need one light bulb to produce strong light have the advantages of easy maintenance and energy saving.

The present invention provides a plasma lamp, which includes: a radio frequency drive unit connected to a DC power supply for generating radio frequency electromagnetic waves; a transmitting unit connected to the radio frequency drive unit for emitting radio frequency electromagnetic wave; electrodeless plasma bulb, coupled to the transmitting unit; radio frequency cable, the radio frequency drive unit and transmitting unit are connected through the radio frequency cable; lampshade, fix the electrodeless plasma bulb to the lampshade Inside, the inside of the lampshade is a reflective layer; the light-transmitting cover is connected to the lower part of the lampshade, and the light-transmitting cover is provided with a reflection or refraction pattern layer for reflecting or refracting the light irradiated on the reflection pattern layer.

Please refer to Fig. 1 and Fig. 2, the plasma lamp provided by the embodiment of the present invention includes: a radio frequency driving unit 101, connected to a DC power supply, for generating radio frequency electromagnetic waves; a transmitting unit 102, connected to the radio frequency driving unit, for emitting the The radio frequency electromagnetic wave generated by the radio frequency driving unit; the electrodeless plasma bulb 103, coupled to the transmitting unit; the radio frequency cable 104, the radio frequency driving unit and the transmitting unit are connected through the radio frequency cable; the lampshade 105, the The plasma bulb 103 is fixed in the lampshade. The plasma bulb 103 is an electrodeless plasma bulb. The emitting unit 102 may include an insulating material lamp holder, and the electrodeless plasma bulb 103 is embedded in the insulating material lamp holder for fixing. The inside of the lampshade is a reflective layer; the transparent cover 106 is connected to the lower part of the lampshade, and a reflective pattern layer 160 is arranged on the inside of the transparent cover, which is used to reflect the light irradiated on the reflective pattern layer 160 back to the lampshade 105 , and then the lampshade 105 reflects the above-mentioned light from the position passing through the edge of the light-transmitting cover 106 ; the heat sink 107 is connected to the emitting unit 102 .

The surface of the reflective pattern layer 160 is provided with a total reflection coating, or a semi-reflective and translucent coating. The reflective pattern layer 160 may include a plurality of conical structures disposed in the middle of the light-transmitting cover 106 without being connected. As shown in FIG. 3 , a total reflection coating 161 is provided on the surface of the conical structures. The reflective pattern layer 161 can be arranged in the middle of the light-transmitting cover 106, so that when the light in the middle of the light-transmitting cover 106 passes through the reflective pattern layer 160, a part is reflected back to the lampshade 105, and then reflected by the lampshade 105 to the edge near the light-transmitting cover 106. Position, so that the light intensity distribution curve approximates the shape of a batwing, so that the light intensity in the middle of the illumination is small, and the light intensity in the two side oblique angles is large. When the light hits the ground, the middle and edge of the emitted light pattern can be obtained relatively Uniform light intensity.

As shown in Figures 4 and 5, the reflective pattern layer 260 on the light-transmitting cover 206 can also be a cone structure, and the surface of the cone structure is provided with a semi-reflective and translucent coating 261, which reflects part of the light irradiated on it to Shade 105 .

As shown in Fig. 10 and Fig. 11, in another embodiment of the present invention, the upper surface or the lower surface of the transparent cover 106 is provided with a refraction pattern layer 270, and the refraction pattern layer 270 is a hemispherical light scattered through it.

The length of the radio frequency cable 104 is 1, 2, 4, 8, 16, 32, 64, 1/2, 1/4, 1/8, 1/16, 1/32 or 1/64 of C/f times, where C is the speed of light, and f is the frequency of the radio frequency electromagnetic wave. Take 1, 2, 4, 8, 16, 32, 64, 1/2, 1/4, 1/8, 1/16, 1/32 or 1/64 times of C/f as the length of the cable. Make the transmission efficiency of the cable higher.

As shown in Figure 6, the radio frequency driving unit 101 may include:

The oscillator 1011 is used to generate an oscillating signal.

The pre-amplifier 1012 is used to preliminarily amplify the weak oscillation signal generated by the oscillator, so as to drive the lower-stage amplifier.

The amplifier 1013 is used to further amplify the signal from the preamplifier to the required power.

The frequency of the radio frequency electromagnetic wave generated by the oscillator 1011 may be 900×10 ⁶ Hz or 450×10 ⁶ Hz or 2400×10 ⁶ Hz.

As shown in FIG. 7 , the plasma lamp further includes: an AC-DC transformer 108 connected to the RF drive unit for providing DC voltage.

Please refer to FIG. 8 and FIG. 2 , the plasma lamp further includes: a cooling fin 800 connected to the RF drive unit 101 ; a cooling fin 107 connected to the emitting unit 102 .

The transmitting unit 102 also includes a waterproof connection device, and the transmitting unit 102 is connected to the radio frequency cable 104 through the waterproof connection device. As shown in Figure 9A, the waterproof connection device includes a male head 502 and a female seat 501:

The female seat 501 has a first annular connection structure 5011 fixed to the first base 5013, the inner wall of the annular connection structure has a first thread structure 5012, and the first base 5013 is provided with an annular waterproof structure 5014, The annular waterproof structure 5014 is also in close contact with the bottom inner wall of the first annular connection structure 5011; the male head 502 has a second annular connection structure 5021, and the outer wall of the second annular connection structure has a The second thread structure 5022 corresponds to the first thread structure 5012 on the inner wall of the first annular connection structure 5011 of the female base. Wherein the distance from the upper surface of the waterproof structure 5014 to the bottommost thread of the first threaded structure 5012 is smaller than the distance from the top of the second annular connection structure 5021 to the topmost thread of the second threaded structure 5022 . As shown in FIG. 9B , when the female seat 501 is engaged with the male head 502 , the top of the second thread structure 5022 of the male head 502 will withstand the ring-shaped waterproof structure 5014 and compress it to a certain thickness.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (13)

1. A plasma lamp, characterized in that the plasma lamp comprises: A radio frequency drive unit, connected to a DC power supply, is used to generate radio frequency electromagnetic waves; A transmitting unit, connected to the radio frequency driving unit, for transmitting radio frequency electromagnetic waves generated by the radio frequency driving unit; an electrodeless plasma bulb, coupled to the emitting unit; A radio frequency cable, the radio frequency driving unit and the transmitting unit are connected through the radio frequency cable; A lampshade, fixing the electrodeless plasma bulb in the lampshade, and the inside of the lampshade is a reflective layer; The light-transmitting cover is connected to the lower part of the lampshade, and the light-transmitting cover is provided with a reflection or refraction pattern layer for reflecting or refracting light irradiated on the reflection pattern layer. 2. The plasma lamp according to claim 1, wherein a reflective pattern layer is provided inside the light-transmitting cover to reflect the light irradiated thereon back to the lampshade, and then the above-mentioned light is reflected by the lampshade Reflected from the position past the edge of the translucent mask. 3. The plasma lamp according to claim 2, wherein the surface of the reflective pattern layer is provided with a total reflection coating or a semi-reflective and translucent coating. 4. The plasma lamp according to claim 2, wherein the reflective pattern layer comprises at least one conical structure disposed in the middle of the light-transmitting cover, and the at least one conical structure is not connected. 5 . The ion lamp according to claim 1 , wherein the refraction pattern layer is a hemisphere, and is arranged on the upper surface or the lower surface of the light-transmitting cover. 6 . 6. The plasma lamp according to claim 1, wherein the length of the radio frequency cable is 1, 2, 4, 8, 16, 32, 64, 1/2, 1/4, 1/8, 1/16, 1/32 or 1/64 times, where C is the speed of light, and f is the frequency of the radio frequency electromagnetic wave. 7. The plasma lamp according to claim 1, wherein the frequency of the radio frequency electromagnetic wave is 900×10 ⁶ Hz. 8. The plasma lamp according to claim 1, wherein the frequency of the radio frequency electromagnetic wave is 450×10 ⁶ Hz. 9. The plasma lamp according to claim 1, wherein the frequency of the radio frequency electromagnetic wave is 2400×10 ⁶ Hz. 10. The plasma lamp according to claim 1, wherein the plasma lamp further comprises: The heat sink is connected to the radio frequency drive unit. 11. The plasma lamp according to claim 1, wherein the plasma lamp further comprises: An AC-DC transformer, connected to the radio frequency drive unit, for providing DC voltage. 12. The plasma lamp according to claim 1, wherein the transmitting unit comprises a waterproof connection device, the transmitting unit is connected to the radio frequency cable through the waterproof connection device, and the waterproof connection device comprises a male connector and female seat: The female base has a first ring-shaped connection structure fixed to the first base, the inner wall of the ring-shaped connection structure has a first thread structure, and the first base is provided with a ring-shaped waterproof structure, and the ring-shaped waterproof structure Also in close contact with the bottom inner wall of the first annular connection structure; The male head has a second annular connection structure, and the outer wall of the second annular connection structure has a second thread structure corresponding to the first thread structure on the inner wall of the first annular connection structure of the female seat; Wherein the distance from the upper surface of the waterproof structure to the bottommost thread of the first thread structure is smaller than the distance from the top of the second annular connection structure to the topmost thread of the second thread structure. 13. The plasma lamp according to claim 1, wherein the radio frequency drive unit further comprises: an oscillator for generating an oscillating signal; A preamplifier, connected to the oscillator, is used to preliminarily amplify the weak oscillation signal generated by the oscillator, so as to drive the lower amplifier; An amplifier, connected to the preamplifier, is used to further amplify the signal from the preamplifier to the required power.

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