JP3174155U - Hybrid lighting device - Google Patents

Abstract

A hybrid illumination device that achieves high light emission and high-efficiency light distribution by combining LED illumination and electrodeless illumination.
An electrodeless illumination unit comprising a fluorescent tube in which fluorescent powder is applied to an inner peripheral wall and mercury gas is enclosed and an induction coil wound around a ferrite core, and a surface-mount type comprising one or a plurality of LED elements A bullet-shaped LED illuminating unit is provided, and the LED illuminating unit is arranged at a position behind the fluorescent tube so as not to overlap the electrodeless illuminating unit when viewed from below.
[Selection] Figure 1

Description

  The present invention relates to a hybrid lighting device that achieves high light emission and high-efficiency light distribution by combining LED lighting and electrodeless lighting.

  The LED lighting device has the greatest advantage of reducing power consumption in that its price is reduced by mass production and a ballast and an inverter are not required compared to a fluorescent lamp. Also, incandescent bulbs have a lower luminous efficiency and a shorter lifespan than fluorescent lamps, even without problems such as mercury and inverters. The LED lighting device has been widely used for illumination and the like since the development of red to blue diodes, and the invention of blue light emitting diodes has enabled pure white light emission. At present, many LED lighting devices are developed and mass-produced and marketed. As the sales volume greatly expands, the existing filament lamp is gradually replaced by replacing the old filament with the fluorescent lamp. It's getting on. White LEDs tend to further expand the product base with the granting of patents by specialized manufacturers.

  LED lighting devices are generally those in which an LED element is mounted on a part of a substrate formed of plastic or ceramic, and examples thereof include JP-A Nos. 2003-281909 and 2008-21561. The LED lighting device generally has a strong directivity of light and can deliver light far away in one direction, but the front surface of the LED element is bright and the surrounding portion tends to be dark. In addition, LED lighting devices were originally intended for cold light such as firefly and firefly squid light, using 90% or more of the total energy as light energy, and aiming for a device that generates less heat, It does not extend to the invention.

  On the other hand, the electrodeless illumination device uses the principle of electrodeless discharge in which gas inside the tube is discharged by electromagnetic induction from the outside to emit light. For this reason, the electrodeless illumination device does not have a lifetime due to the consumption of the electrode material applied to the electrode inside the lamp unlike a conventional lamp, and can realize a light source with a significantly long lifetime. Known electrodeless lighting devices are being put to practical use in energy saving and light sources that are difficult to maintain, such as gas stations, street lighting and traffic lighting such as street lights and tunnel lights. JP-A-10-12195 and the like exist.

JP 2003-281909 A JP 2008-21561 A Japanese Patent Laid-Open No. 10-12195

  The LED illumination device has a strong directivity of light, and has a light distribution such as A in the graph of FIG. Even if the LED lighting device has improved the problem that the surrounding area of the LED element becomes dark, it cannot be said that it has been sufficiently solved. In addition, the LED lighting device has a circuit configuration as shown in FIG. 5, for example, and has a low heat generation using 90% or more of the total energy as light energy. As a result, the drive circuit of the LED lighting device is complicated, the heat generation of the drive circuit itself is increased, and the heat generation of the power LED itself is also increased, thereby complicating the heat dissipation mechanism and the heat sink.

  On the other hand, the electrodeless illumination device has a general light distribution, and has a light distribution as indicated by B in the graph of FIG. The electrodeless lighting device has a circuit configuration as illustrated in FIG. 6, and even a light source with a long life is likely to generate electromagnetic noise because the driving frequency is about 13 MHz, and the driving circuit also has the frequency. The price of the oscillation circuit to be generated is increased and the size is increased. For this reason, electrodeless illumination is a general light distribution even if the replacement from incandescent bulbs, halogen lamps and LED bulbs is expected due to improvements from megahertz (MHz) to kilohertz (kHz) bodies at the same high frequency. Even if a reflector is used, it is difficult to extremely narrow the light distribution area, and it is difficult to deliver light far away.

  As can be seen from the light distribution diagram of the high power LED illumination device and the electrodeless illumination device shown in FIG. 4, the light distribution A of the LED illumination device spreads almost linearly and the reaching light extends. On the other hand, the light distribution B of the electrodeless lighting device has a large spread, but the extension of the reaching light is sweet. When both the LED lighting device and the electrodeless lighting device are integrated and projected, as shown in FIG. 4, the light distributions A and B have an overall spread, and light distribution is also generated. There is a possibility that illumination having characteristics can be performed, and many application expansions can be expected for the illumination device.

  The present invention has been proposed in order to improve the problems of conventional LED lighting devices and electrodeless lighting devices, effectively combining the advantages of LED lighting and electrodeless lighting, and integrating them together. The object is to provide a hybrid lighting device that complements the shortcomings of individual lighting. Another object of the present invention is to provide a hybrid illuminating device that is highly luminous and highly efficient even at a relatively low price by sharing a part of the reflection plate and the circuit mechanism.

  A hybrid lighting device according to the present invention includes an electrodeless lighting unit including a fluorescent tube in which fluorescent powder is applied to an inner peripheral wall and mercury gas is sealed, and an induction coil wound around a ferrite core, and one or a plurality of LED elements. A surface mount type or bullet-shaped LED illumination unit, and the LED illumination unit is disposed at a position behind the fluorescent tube so as not to overlap the electrodeless illumination unit as viewed from below. If the fluorescent tube is donut-shaped and the LED illumination unit is surface-mounted, the outer diameter of the substrate connected to the LED element is smaller than the inner diameter of the fluorescent tube of the electrodeless illumination unit, and the substrate is located behind the fluorescent tube. It is preferable to arrange it concentrically with the fluorescent tube.

  A hybrid illumination device according to the present invention includes an electrodeless illumination unit comprising a donut-shaped fluorescent tube coated with fluorescent powder on an inner peripheral wall and sealed with mercury gas, and an induction coil wound around a ferrite core, and one or more You may have a surface mount type LED illumination part which consists of a board | substrate which connected the LED element, and a reflecting plate larger than the outer diameter of a donut-shaped fluorescent tube in the back of an electrodeless illumination part. The reflection plate reflects light emitted from the electrodeless illumination unit forward, and functions as a heat radiating plate for the LED illumination unit and the drive circuits of both illumination units. Preferably, the metallic glossy reflection plate has a frustoconical inner peripheral surface.

  In the hybrid illumination device according to the present invention, the electrodeless illumination unit is connected to the induction circuit, the drive circuit, and the power supply circuit, and the LED illumination unit is connected to the drive circuit and the power supply circuit, and these circuits are housed in the device. The electrodeless illumination unit and the LED illumination unit share at least a power supply circuit. The electrodeless illumination unit and the LED illumination unit preferably share a protection circuit and a high-frequency inverter circuit.

  The hybrid illumination device according to the present invention can deliver light far from one direction by an LED illumination unit having strong directivity of light by combining LED illumination and electrodeless illumination, and has a general light distribution. Light can be emitted in all directions by electrodeless illumination. Therefore, the hybrid illumination device of the present invention can enhance the light irradiation effect by integrating LED illumination and electrodeless illumination without using an expensive prism, Fresnel lens or light diffusion plastic layer.

  The hybrid lighting device according to the present invention includes a power supply circuit, an inverter circuit, a protection circuit, a drive circuit, an induction circuit, and the like inside the device, and a power supply circuit that is a part of a necessary circuit for the LED lighting unit and the electrodeless lighting unit, The protection circuit and the high-frequency inverter circuit are shared. The hybrid lighting device of the present invention can reduce the manufacturing cost of the entire device by simply sharing part of the circuit functions necessary for the LED lighting unit and the electrodeless lighting unit, rather than simply installing the LED lighting device and the electrodeless lighting device. We are trying to reduce prices.

  The hybrid lighting device according to the present invention secures a desired light distribution and brightness by a multichip in which one high power LED or a plurality of LED elements are mounted in LED lighting in addition to electrodeless lighting. In the hybrid lighting device of the present invention, energy that has not been converted to light is released as self-generated heat, so the reflection plate of the electrodeless lighting unit is used as a heat sink for high-power LEDs, and not only the circuit function is shared. In addition, the simple mechanism enables the high power LED diffusion mechanism.

  The hybrid lighting device according to the present invention intends to expand the application as a lighting device by integrating LED lighting and electrodeless lighting. The hybrid lighting device of the present invention is not only used as a spotlight or downlight with LED bulbs, but is also relatively inexpensive and suitable for night lighting in amusement fields and stadiums, outdoor lighting, garden lighting, event lighting, ceiling lights, etc. Deployment becomes possible.

It is a schematic explanatory drawing which shows a part of circuit block with the cross section of the hybrid illuminating device which concerns on this invention. It is a schematic plan view which shows the hybrid illuminating device of FIG. 1 from the lower side. It is a block diagram of the circuit applied to the hybrid illuminating device of this invention. It is a graph which shows the light distribution diagram of a high power LED lighting apparatus and an electrodeless lighting apparatus. It is a block diagram of the circuit applied to the conventional LED lighting apparatus. It is a block diagram of the circuit applied to the conventional electrodeless illumination apparatus.

  1 and 2 illustrate a hybrid lighting device 1 according to the present invention. The hybrid illumination device 1 includes an electrodeless illumination unit 5 including a fluorescent tube 2 and an induction coil 3, and an LED illumination unit 8 including one or a plurality of LED elements 6. The LED illumination unit 8 is a surface-mount type or a bullet-type, and has a substrate 7 to which one or a plurality of LED elements 6 are connected if the surface is a surface-mount type. The induction coil 3 is wound around the ferrite core 11 and is adjacent to the fluorescent tube 2. As shown in FIG. 3, the hybrid lighting device 1 has a power supply unit 14 installed in the rear portion 10 of the device.

  In the electrodeless illumination unit 5, the fluorescent tube 2 has a donut shape having a circular cross section, an elongated straight tube shape, or a bulb shape. If the fluorescent tube 2 has a donut shape, the substrate 7 of the LED illumination unit 8 can be arranged in the center. If the fluorescent tube is a straight tube type, the substrate of the LED illumination unit 8 may be distributed to one side or both sides. If the fluorescent tube is a bulb type, the annular substrate of the LED illumination unit 8 is arranged outside the bulb. do it.

  In general, the induction coil 3 has a structure in which a cylindrical ferrite core 11 fitted to the fluorescent tube 2 is wound many times, and it is preferable that the two cores 11 are arranged in correspondence with each other in the diameter direction of the fluorescent tube 2. When a high-frequency current is passed through the induction coil 3, a high-frequency electromagnetic field is applied to the tube from the outside of the fluorescent tube 2 filled with mercury gas, and an induction electric field generated by the high-frequency electromagnetic field forms a discharge path, and mercury vapor is generated in the tube. Excites and generates ultraviolet light.

  When the induction coil 3 is an internal coil system using the ferrite core 11 as in the hybrid lighting device 1, the drive frequency is reduced to about 1 / from the conventional air-core external coil system with a drive frequency of 13.56 MHz. It is possible to lower the frequency to 100, which is 135 kHz, and by reducing the frequency, the loss of the lighting system can be greatly reduced. The electrodeless illumination unit 5 includes a 50 W type having a light output of 4550 lm.

  The LED illuminating unit 8 is generally a surface mount type that connects the LED element 6 to the substrate 7, and may be a bullet type like a pin insertion type depending on the application. The electrodeless illumination unit 5 is disposed at a position that does not overlap. In order to ensure a predetermined brightness, the LED illumination unit 8 generally uses one high power LED of 0.5 to 1 W or more, or a light emitting surface is enlarged by a multichip on which a large number of LED elements are mounted. Thus, a high power LED may be configured. In the LED illumination unit 8, the substrate 7 has a planar shape such as a circle or a square. When the substrate 7 is a circle, the annular shape of the substrate 7 is substantially the back of the fluorescent tube 2 when the device 1 is viewed from below as shown in FIG. It is preferable to arrange them in the center, that is, concentrically.

  The LED element 6 should just select an appropriate thing in consideration of luminescent color, cost, etc. For example, as the LED element 6, a white LED element, a blue LED element, a green LED element, a yellow-green LED element, an orange LED element, a red LED element, a purple LED element, an ultraviolet LED element, and the like can be listed. As described above, a single LED element 6 usually has a small amount of light, so a plurality of LED elements 6 are attached. In this case, the positional relationship between the LED elements 6 is fixed by a flat substrate 7, and each LED element 6 is placed in a desired position. To place. The board | substrate 7 should just be a printed circuit board, a metal, glass, ceramics, the molded object made from resin.

  When arranging the plurality of LED elements 6 on the substrate 7, the arrangement form on the surface thereof may be either regular or irregular such as square lattice, hexagonal lattice, concentric circle, radial, etc. 6 is connected to a power source via an electric wire and applied with a voltage. In the LED illumination unit 8, for example, the lens 13 is moderately distributed in the front of the substrate 7 by reducing the directivity of light. The lens 13 is preferably a cup lens with high light collection efficiency, and performs light distribution control so that the light emitted from the LED element 6 is reflected by the paraboloid of the cup lens and emitted in one direction.

  In the LED illumination unit 8, it is also possible to make a light distribution characteristic uniform by arranging a Fresnel lens made of a concentric lens body for each LED element 6. Although this Fresnel lens has an effect of condensing light in a certain direction, it does not spread around the periphery, and it is impossible to eliminate unevenness in the brightness of illumination light. Instead of such a lens, a sheet-like prism sheet that allows light emitted from each LED element 6 to enter and then exit may be used, and is in contact with the prism sheet and filled with light diffusing particles. It is also possible to arrange a light diffusion layer or the like.

  The hybrid illuminating device 1 has a substantially cylindrical device rear portion 10, and a reflection plate 12 having a frustoconical inner peripheral surface is attached from the center of the peripheral wall of the rear portion. The reflection plate 12 is a square or circular plane as shown in FIG. 2, and the lower outer diameter thereof is larger than the outer diameter of the doughnut-shaped fluorescent tube 2, and the lower end periphery thereof is lower than the lower peripheral end of the fluorescent tube 2. It is preferable that it is located in. The reflection plate 12 may be formed of an aluminum plate having an inner circumferential surface having a corrugated cross section, and may be covered with a translucent hood (not shown) or a lighting cover.

  In the hybrid lighting device 1, as schematically shown in FIG. 3, the electrodeless lighting unit 5 and the LED lighting unit 8 can share the power supply circuit 16, the protection circuit 24, the high-frequency inverter circuit 22, and the like. The hybrid lighting device 1 is smaller in size as a whole than the LED lighting device and the electrodeless lighting device are individually installed by sharing the circuits 16, 22, 24, etc. with respect to the electrodeless lighting unit 5 and the LED lighting unit 8. And lower manufacturing costs.

  The hybrid lighting device 1 has a light emitting surface that is enlarged by a multichip in which a large number of LED elements 6 are mounted in the LED lighting unit 8, while the electrodeless lighting unit 5 is formed by the reflection plate 12 even in general light distribution. Suppresses upward light distribution. In the hybrid lighting device 1, the light distribution A of the LED illumination unit 8 spreads almost linearly and the reaching light extends long, while the light distribution B of the electrodeless lighting unit 5 extends even if the light distribution B has a large spread. Is relatively short. In the hybrid illumination device 1, the LED illumination unit 8 and the electrodeless illumination unit 5 are integrated and projected, and as shown in FIG. 4, the combined light distributions A and B have an overall spread, Illumination having a light distribution characteristic that also causes elongation of the light can be performed.

  In the hybrid lighting device 1, energy that has not been converted to light is emitted as self-generated heat from a large number of LED elements 6, and the induction circuit 26 and the drive circuits 18, 20, 28, etc. also generate heat. Heat is dissipated using a heat sink. In addition, it is desirable that the entire peripheral surface of the lighting device 1 be configured to be able to emit heat. The hybrid lighting device 1 not only shares the circuit functions of the LED lighting unit 8 and the electrodeless lighting unit 5 but also shares the reflection plate 12 for the diffusion of high-power LEDs and the like.

  The hybrid lighting device 1 achieves expansion of applications as a lighting device by integrating the LED lighting unit 8 and the electrodeless lighting unit 5. The hybrid lighting device 1 can be used for landscape lighting such as street lights and tunnel lights, traffic lighting, night lighting for game halls and stadiums, garden lighting, event lighting, etc. Spotlights, downlights, ceiling lights, It can also be used on floor stands.

  Next, this invention is demonstrated based on an Example. 1 and 2 show a hybrid lighting device 1 according to the present invention. The hybrid illumination device includes an electrodeless illumination unit 5 including a donut-shaped fluorescent tube 2 and an induction coil 3, and an LED illumination unit 8 including a circular substrate 7 to which a plurality of LED elements 6 are connected. The fluorescent tube 2 is coated with fluorescent powder on its inner peripheral wall and sealed with mercury gas.

  The hybrid illuminating device 1 has a substantially cylindrical device rear portion 10, and a reflection plate 12 having a frustoconical inner peripheral surface is attached from the center of the peripheral wall of the rear portion. The reflection plate 12 is a square or circular plane as shown in FIG. 2, and the lower outer diameter thereof is larger than the outer diameter of the doughnut-shaped fluorescent tube 2, and the lower end periphery thereof is lower than the lower peripheral end of the fluorescent tube 2. It is preferable that it is located in. The reflection plate 12 may be formed of an aluminum plate having an inner circumferential surface having a corrugated cross section, and may further cover the entire plate with a translucent hood (not shown).

  A donut-shaped fluorescent tube 2 having a circular cross section is horizontally arranged at the center in front of the apparatus and attached to the apparatus rear part 10. The induction coil 3 has a structure in which a cylindrical ferrite core 11 fitted to the fluorescent tube 2 is wound many times, and two cores 11 are arranged in correspondence with each other in the diameter direction of the fluorescent tube 2. When a high-frequency current is passed through the induction coil 3, a high-frequency electromagnetic field is applied to the tube from the outside of the fluorescent tube 2 filled with mercury gas, and an induction electric field generated by the high-frequency electromagnetic field forms a discharge path, and mercury vapor is generated in the tube. Excites and generates ultraviolet light.

  In the LED illumination unit 8, the circular substrate 7 is arranged and fixed concentrically behind the fluorescent tube 2 when the apparatus 1 is viewed from below as shown in FIG. 2. When the plurality of LED elements 6 are arranged on the substrate 7, the arrangement form on the surface thereof is a square lattice shape, and each LED element 6 is connected to a power source via an electric wire and applied with a voltage. In the LED illumination unit 8, a lens 13 is installed in front of the substrate 7 to moderate the light directivity and appropriately distribute light.

  As shown in FIG. 3, the hybrid lighting device 1 has a power supply unit 14 installed in the rear portion 10 of the device. The power supply unit 14 includes a power supply circuit 16, drive circuits 18 and 20, a high frequency inverter circuit 22, and a protection circuit 24. An induction circuit 26 is connected to the electrodeless illumination unit 5, and the AC power source is connected to the induction circuit 26 via the drive circuit 18, and from the AC power source to the induction circuit 26 via the power supply circuit 16, the inverter circuit 22, and the protection circuit 24. Connecting. On the other hand, a drive circuit 28 is connected to the LED illumination unit 8 and connected to the drive circuit 28 from the AC power source through the drive circuit 20, and from the AC power source to the drive circuit 28 through the power supply circuit 16, the inverter circuit 22, and the protection circuit 24. Connect to.

  The electrodeless illumination unit 5 and the LED illumination unit 8 share the power supply circuit 16, the protection circuit 24, and the high-frequency inverter circuit 22. The hybrid lighting device 1 can reduce the manufacturing cost of the entire device rather than individually installing the LED lighting device and the electrodeless lighting device by sharing the circuits 16, 22, and 24 for the electrodeless lighting unit 5 and the LED lighting unit 8. We are trying to reduce prices.

  In the LED lighting unit 8, the hybrid lighting device 1 configures a high-power LED by enlarging a light emitting surface by a multichip on which a large number of LED elements 6 are mounted, and ensures a predetermined light intensity. On the other hand, the electrodeless illumination unit 5 suppresses upward light distribution by the reflection plate 12 even in general light distribution. The hybrid illumination device 1 has a light distribution characteristic in which the electrodeless illumination unit 5 and the LED illumination unit 8 are in a light distribution state that combines A and B in FIG. .

  In the hybrid lighting device 1, energy that has not been converted to light is released as self-generated heat and heat is also generated from the circuit. Therefore, it is necessary to sufficiently dissipate the heat. Also used as a heat sink. The hybrid lighting device 1 enables not only the sharing of circuit functions but also the diffusion function of high-power LEDs in the reflection plate 12.

  The hybrid lighting device 1 achieves expansion of applications as a lighting device by integrating the LED lighting unit 8 and the electrodeless lighting unit 5. The hybrid lighting device 1 can be used as a spotlight or downlight by the LED lighting unit 8, and can be used for night lighting, outdoor lighting, garden lighting, event lighting, etc. at a relatively low cost. become.

DESCRIPTION OF SYMBOLS 1 Hybrid illumination apparatus 2 Fluorescent tube 3 Induction coil 5 Electrodeless illumination part 6 LED element 7 Board | substrate 8 LED illumination part

Claims (7)

  Electrodeless illumination unit consisting of a fluorescent tube coated with fluorescent powder on the inner peripheral wall and sealed with mercury gas, and an induction coil wound around a ferrite core, and a surface-mounted or bullet-shaped LED consisting of one or a plurality of LED elements A hybrid illumination device including an illumination unit, the LED illumination unit being disposed at a position behind the fluorescent tube so as not to overlap the electrodeless illumination unit when viewed from below.   If the fluorescent tube is donut-shaped and the LED illumination unit is surface-mounted, the outer diameter of the substrate connected to the LED element is smaller than the inner diameter of the fluorescent tube of the electrodeless illumination unit, and the substrate is located behind the fluorescent tube. The lighting device according to claim 1, wherein the lighting device is arranged concentrically with the fluorescent tube.   A surface composed of a substrate connected with one or more LED elements, and an electrodeless illumination section consisting of a doughnut-shaped fluorescent tube coated with fluorescent powder on the inner peripheral wall and sealed with mercury gas, and an induction coil wound around a ferrite core The mounting type LED illumination unit and a reflection plate larger than the outer diameter of the donut-shaped fluorescent tube behind the electrodeless illumination unit, and the reflection plate reflects light emitted from the electrodeless illumination unit forward A hybrid illumination device that functions as a heat sink for the LED illumination unit and the drive circuit for both illumination units.   The lighting device according to claim 1, wherein the metallic glossy reflection plate has a frustoconical inner peripheral surface.   It consists of a doughnut-shaped fluorescent tube coated with fluorescent powder on the inner peripheral wall and sealed with mercury gas, an electrodeless illumination part consisting of an induction coil wound around a ferrite core, and a circular package incorporating one or more LED elements The LED illumination unit, the electrodeless illumination unit is connected to the induction circuit, the drive circuit, and the power supply circuit, and the LED illumination unit is connected to the drive circuit and the power supply circuit, and these circuits are housed in the apparatus. A hybrid illumination device in which the electrodeless illumination unit and the LED illumination unit share at least a power supply circuit.   The illumination apparatus according to claim 5, wherein the electrodeless illumination unit and the LED illumination unit share a protection circuit and a high-frequency inverter circuit.   A surface composed of a substrate connected with one or more LED elements, and an electrodeless illumination section consisting of a doughnut-shaped fluorescent tube coated with fluorescent powder on the inner peripheral wall and sealed with mercury gas, and an induction coil wound around a ferrite core A mounting-type LED illuminating unit, and a reflection plate larger than the outer diameter of the donut-shaped fluorescent tube behind the electrodeless illuminating unit, and the substrate of the LED element has an annular shape behind the donut-shaped fluorescent tube The reflection plate is located at substantially the center and reflects the light emitted from the electrodeless illumination unit forward, and functions as a heat sink for the LED illumination unit and the drive circuit of both illumination units. The LED illumination unit is connected to the drive circuit and the power supply circuit, and the LED illumination unit is connected to the drive circuit and the power supply circuit. Hybrid illumination device ED illumination unit sharing the least power circuit.

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