JP2008135359A - Lighting apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting apparatus using a solid light-emitting element as a light source, which can reduce a generated heat and a power consumption. <P>SOLUTION: The lighting apparatus is provided with a voltage supplying part to supply voltage and a plurality of solid light-emitting elements 31 which emit light by a voltage supplied from the voltage supplying part, and the plurality of the solid light-emitting elements 31 are connected in series and a supplied voltage from the voltage supplying part is impressed on the plurality of solid light-emitting elements connected in series. The supplied voltage is set up so that a current flowing in each of the plurality of solid light-emitting elements 31 may become 1/N (wherein N is a number of 2 or more) or less of the maximum rated current. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an illuminating device, and more particularly to an illuminating device using a solid light emitting element such as a light emitting diode as a light source.

  Conventionally, a fluorescent lamp has been used as a lighting device. Fluorescent lamps are superior to incandescent bulbs in terms of efficiency and lifetime. Therefore, it is widely used.

  However, mercury is used in fluorescent lamps, though in a very small amount. Mercury is a harmful substance that causes neurological disorders such as Minamata disease when ordinary people ingest mercury. Therefore, on the basis of the recent improvement in environmental awareness, in Europe, the Restriction of the use of ceramics, Hazardous Substituting in electrical and electrical equipment (EHS) directive has come into effect, and the use of mercury has begun to be restricted.

  Moreover, although the life of the fluorescent lamp is longer than that of the incandescent lamp, its life is not always sufficient at about 6000 hours. In addition, the life characteristics vary greatly. This often requires replacement of lamps that have expired.

  In view of such a situation, in recent years, an illuminating device using a light-emitting diode having a long life as a light source has attracted attention. The light emitting diode has a very long time of 40,000 hours or more until the emission intensity is reduced to 80% or less of the initial value. In addition, mercury is not included, and this is a great advantage.

  However, the light-emitting diode used for illumination is a high-power diode with a power consumption of 1 W or more per one. In the light emitting diode, most of the input energy (about 80%) becomes heat as a loss, but in the high power light emitting diode, the amount of heat generated increases as the power consumption increases. If this heat is accumulated in the vicinity of the light emitting diode, the luminous intensity of the light emitting diode is reduced, the life characteristics are deteriorated, and the like. In the worst case, the light emitting diode does not light up.

On the other hand, there has been proposed a lighting device that efficiently reduces heat generated from a light emitting diode and prevents deterioration of the light emitting diode due to heat, thereby preventing a decrease in luminous intensity and deterioration of life characteristics of the light emitting diode (for example, , See Patent Document 1).
JP 2001-305970 A

  However, the illuminating device described in Patent Document 1 only prevents heat from being accumulated in the vicinity of the light emitting diode by efficiently dissipating heat generated by the light emitting diode used in the illuminating device. The total amount of heat generated from the light emitting diodes constituting the is not reduced. That is, the power consumption of the light emitting diode remains large. The present invention has been made to solve the above-described problems, and an object of the present invention is to provide an illumination device using a solid light-emitting element as a light source, which can reduce generated heat and reduce power consumption. .

  In order to achieve the above object, an illumination device according to the present invention includes a voltage supply unit that supplies a voltage, and a plurality of solid-state light-emitting elements that generate light by the voltage supplied from the voltage supply unit. The solid-state light emitting elements are connected in series, and a supply voltage from the voltage supply means is applied to the plurality of solid-state light emitting elements connected in series, and the supply voltage is applied to each of the plurality of solid-state light emitting elements. Is set to a voltage that is 1 / N (N is a number of 2 or more) of the maximum rated current.

Here, 1 / N of the maximum rated current may be 1/3.
By the way, the luminous efficiency of the solid-state light emitting element changes according to the applied voltage and the applied current. In addition, when the maximum current at the rated current of the solid state light emitting device is the maximum rated current, it is desirable to emit light at a current value lower than the maximum rated current in consideration of light emission efficiency and suppression of heat generation. . Therefore, according to this structure, since each solid light emitting element which comprises an illuminating device can be used by the low electric current value which can reduce the heat | fever generate | occur | produced as a loss, it can implement | achieve reduction of generation | occurrence | production of a heat | fever. . Further, at a low current value at which each solid state light emitting element is used, the light emitting efficiency of the solid state light emitting element is good, so that power consumption of each solid state light emitting element can be reduced. Therefore, it is possible to reduce the power consumption of the lighting device including the solid light emitting elements.

  Here, the illuminating device further includes one or more solid light emitting element rows in which the same number of solid light emitting elements as the plurality of solid light emitting elements are connected in series, the plurality of solid light emitting elements and the one or more solid light emitting elements. The solid light emitting element array may be connected in parallel.

  According to this configuration, it is possible to realize the light emission amount required for the lighting device while reducing the heat and power consumption of each solid-state light emitting element constituting the lighting device.

  Here, a plurality of solid state light emitting elements, a holding means for holding the plurality of solid state light emitting elements, a housing part in which the holding means is disposed inside, and a first part disposed at one end in the longitudinal direction of the housing part. AC power supplied from the outside to 1 terminal and 2nd terminal, 3rd terminal and 4th terminal arrange | positioned at the other end of the longitudinal direction of the said housing | casing part, and said 1st terminal and said 3rd terminal The first rectifying means for converting to DC power and supplying the plurality of solid state light emitting devices, AC power supplied from the outside to the second terminal and the fourth terminal are converted to DC power, and the plurality of solid states You may provide the 2nd rectification | straightening means supplied to a light emitting element.

  According to this configuration, the solid state light emitting device can be driven by the DC power converted by the first rectifying means or the second rectifying means. Furthermore, the first rectifying means and the second rectifying means are in accordance with which of the first terminal, the second terminal, the third terminal, and the fourth terminal is supplied with AC power from the outside. Operates selectively. Thereby, the influence of the alternating current power supplied from the outside does not appear in two terminals to which the alternating current power is not supplied from the outside among the first terminal, the second terminal, the third terminal, and the fourth terminal. Therefore, the lighting device according to the present invention operates stably because the glow lamp or the like does not operate at the time of lighting in any of the glow lamp lighting system, the inverter system, and the rapid start system fluorescent lamp support. be able to. That is, the illumination device according to the present invention can be used in place of fluorescent lamps for various types of fluorescent lamp support.

  The first rectifying means has an anode connected to the first terminal, a cathode connected to the anode of the solid state light emitting device, an anode connected to the cathode of the solid state light emitting device, and the cathode A second diode connected to the first terminal, an anode connected to the third terminal, a cathode connected to the anode of the solid state light emitting device, and an anode connected to the cathode of the solid state light emitting device And a fourth diode having a cathode connected to the third terminal, and the second rectifying means includes a fifth rectifier having an anode connected to the second terminal and a cathode connected to the anode of the solid state light emitting device. A diode, an anode connected to the cathode of the solid state light emitting device, a cathode connected to the second terminal, and an anode connected to the second terminal; A seventh diode having a cathode connected to the anode of the solid state light emitting device and an anode having an anode connected to the cathode of the solid state light emitting device and a cathode connected to the fourth terminal; You may prepare.

  According to this configuration, even if AC power is supplied from the outside to any one of the first terminal, the second terminal, the third terminal, and the fourth terminal, the first terminal, the second terminal, and the third terminal Two terminals to which no AC power is supplied from outside are not affected by the AC power supplied from outside. Therefore, the lighting device according to the present invention operates stably because the glow lamp, the inverter circuit, and the like do not operate during lighting in any of the glow lamp lighting method, the inverter method, and the rapid start method. Can do.

  The first diode, the second diode, the third diode, the fourth diode, the fifth diode, the sixth diode, the seventh diode, and the eighth diode follow a frequency of at least 20 kHz. It may be a diode that can operate.

  According to this configuration, the first rectifying means and the second rectifying means can efficiently operate with respect to a frequency of 20 kHz or higher that is generally used in an inverter-type support. Therefore, the illuminating device according to the present invention can operate efficiently in the support for the inverter type fluorescent lamp.

  The casing is made of metal, and the casing has a hollow structure, the first space in which the holding means is disposed, the second space having a hollow structure, and the first Two or more first openings that are holes extending from the space part to the outside of the housing part and serving as air inlets to the inside of the second space part, and from the second space part to the housing. One or more second openings that are holes reaching the outside of the body part and serving as outlets of air from the inside of the second space part may be formed.

  According to this configuration, the thermal conductivity of the casing is increased. Thereby, the heat generated as a loss in the solid state light emitting device can be efficiently radiated. Furthermore, the surface area of a housing | casing part can be increased by forming a 2nd space part. Furthermore, the air that has flowed into the second space from the first opening flows out from the second opening. Therefore, the illuminating device according to the present invention can efficiently release heat generated in the illuminating device into the air by using the convection of the surrounding air. Thereby, the illuminating device which concerns on this invention can improve the thermal radiation effect.

  Further, the second space portion may be formed on the opposite side to the light emitting direction of the plurality of solid state light emitting elements with respect to the position where the holding means is disposed in the housing portion.

  According to this configuration, the second space is formed above the holding unit in which the solid light emitting element is arranged in a state where the lighting device is installed on the support. Therefore, air can be efficiently flowed into the second space portion using convection caused by heat. Thereby, the illuminating device which concerns on this invention can improve the thermal radiation effect.

  The second opening may be formed on the opposite side of the light emitting direction of the plurality of solid state light emitting elements of the casing.

  According to this structure, in the state which installed the illuminating device in the support tool, the 2nd opening part is formed above. Thereby, the air heated in the 2nd space part can be efficiently flowed outside from the 2nd opening. Therefore, the lighting device according to the present invention can improve the heat dissipation effect.

  The first opening may be formed on a side surface with respect to the light emitting direction of the plurality of solid state light emitting elements of the casing.

  According to this structure, in the state which installed the illuminating device in the support tool, the 1st opening part is formed in a side surface. Thereby, air can be efficiently flowed into the second space portion using convection generated by heat. Therefore, the lighting device according to the present invention can improve the heat dissipation effect.

  Further, the shape of the surface of the second space portion on the side opposite to the light emitting direction of the plurality of solid state light emitting devices may be streamlined.

  According to this configuration, since air flows smoothly in the second space portion, it is possible to efficiently dissipate heat from the housing portion into the air. Therefore, the lighting device according to the present invention can improve the heat dissipation effect.

  The distance between the first opening and the solid state light emitting device may be closer than the distance between the second opening and the solid state light emitting device.

  According to this configuration, the distance between the solid state light emitting device and the first opening is shortened. Thereby, the heat generated from the solid state light emitting device can be intensively released into the air from the vicinity of the solid state light emitting device. Therefore, the lighting device according to the present invention can improve the heat dissipation effect.

  Further, the direction of the first opening from the second space part side to the surface side of the housing part, and the direction of the second opening part from the surface side of the housing part to the second space part side May be in the range of 0 degrees to 90 degrees.

  According to this configuration, the warmed air around the lighting device can efficiently flow from the first opening to the second space. Moreover, the air that has flowed into the second space can be efficiently discharged to the outside. Therefore, the lighting device according to the present invention can improve the heat dissipation effect.

  Moreover, the said housing | casing part has translucency, You may provide the translucent part formed in the light emission direction of these solid light emitting elements.

According to this configuration, the solid light emitting element can be protected by the light transmitting portion.
In addition, the translucent part may be provided with irregularities on the front surface or the back surface.

  According to this configuration, the light emitted from the solid light emitting element is diffused by the unevenness formed on the front surface or the back surface of the light transmitting portion. Therefore, the illuminating device according to the present invention can weaken the directivity of light emitted from the solid state light emitting device and illuminate a wide range.

  The plurality of convex and concave portions may be formed on the light emitting optical axes of the plurality of solid state light emitting devices.

  According to this configuration, the light on the light emission optical axis of the solid light emitting element with a large amount of light is diffused by the convex portions formed on the front surface or the back surface of the light transmitting portion. Thereby, the illuminating device which concerns on this invention can weaken the directivity of the light light-emitted from the solid light emitting element, and can illuminate a wide range.

  Note that the present invention is not only realized as a device, but also realized as a design support method including steps of design processing for configuring the device, or realized as a program for causing a computer to execute the steps, or the program. It can also be realized as information, data or a signal indicating the above. These programs, information, data, and signals may be distributed via a recording medium such as a CD-ROM or a communication medium such as the Internet.

  As described above, the present invention can provide an illuminating device that aims to provide an illuminating device using a solid light-emitting element as a light source, which can reduce generated heat and reduce power consumption.

  Hereinafter, embodiments of a lighting device according to the present invention will be described in detail with reference to the drawings.

(Embodiment 1)
First, the configuration of the illumination device according to Embodiment 1 of the present invention will be described.

  FIG. 1 is a perspective view showing an appearance of lighting apparatus 1 according to Embodiment 1 of the present invention. FIG. 2 is a plan view from the side of lighting apparatus 1 according to Embodiment 1 of the present invention. FIG. 3 is a plan view from the top surface (direction A shown in FIG. 1) of lighting apparatus 1 according to Embodiment 1 of the present invention. FIG. 4 is a cross-sectional view showing the structure of the illumination device 1 on the B1-B2 plane shown in FIG. FIG. 5 is a diagram illustrating a state in which the lighting device 1 is attached to the support 41 for a straight tube fluorescent lamp. FIG. 6 is a cross-sectional view illustrating the structure of the illumination device 1 and the support 41 on the C1-C2 plane illustrated in FIG.

  As shown in FIGS. 1, 2, and 3, the lighting device 1 includes a housing 2, a terminal 3, a terminal pin 4, and a protective translucent plate 33. Further, the lighting device 1 includes a solid light emitting element 31 and a substrate 32 inside the housing unit 2.

  The illumination device 1 has the same dimensions as a general straight tube fluorescent lamp. For example, the lighting device 1 has the same dimensions as any of the straight tube fluorescent lamps defined in 33.1 “List of data sheets” of JIS C7917-2 “Straight tube fluorescent lamps—Part 2: Performance specification”.

  The casing 2 includes a solid light emitting element 31 and a substrate 32 therein, and a plurality of inflow ports 5, a plurality of outflow ports 21, and a hollow portion 51 are formed. The cross section on the upper side (upper side in FIG. 4) of the housing part 2 is substantially semicircular.

The casing 2 is made of a material having a high thermal conductivity (preferably, a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). For example, the housing | casing part 2 is comprised with aluminum. The reason why aluminum is used for the housing part 2 is that it is inexpensive, easy to mold, has good recyclability, has a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more, and heat dissipation characteristics. Is good.

  Moreover, after the housing | casing part 2 is comprised with aluminum, it is desirable to carry out an alumite process. Alumite treatment increases the surface area and enhances the heat dissipation effect.

  Here, the housing | casing part 2 is comprised by the two components 34 and 35, as shown in FIG. The reason why the casing 2 is composed of two parts is that the two parts 34 and 35 are compared with the case where the casing 2 is manufactured and configured in a lump (in the case of a single component). It can be mentioned that the manufacturing is easier when each is manufactured (configured with two parts). For example, the two parts 34 and 35 are formed by a drawing method or press working, respectively, and then configured to form the housing 2. In addition, the housing | casing part 2 does not necessarily need to be comprised by the two components 34 and 35, and may be comprised by a single component or three or more components. What is necessary is just to determine the number of components which comprise the housing | casing part 2 in consideration of the cost concerning manufacture, and the cost concerning assembly.

  The protective translucent plate 33 has translucency and is disposed in the light emitting direction of the solid state light emitting element 31 of the housing unit 2. The protective translucent plate 33 is formed in a flat plate shape. By integrally combining the housing portion 2 and the protective translucent plate 33, the cross section becomes a substantially square shape.

  The protective translucent plate 33 is formed of transparent glass, acrylic resin, polycarbonate, or the like. On the front or back surface of the protective translucent plate 33, fine irregularities are unevenly formed by the surface treatment. This surface treatment can be easily performed, for example, by applying a sandblast method. A light diffusing sheet may be attached to the front surface or the back surface of the protective translucent plate 33, and a light diffusing agent may be added to the transparent glass or acrylic resin of the protective translucent plate 33. .

  The protective translucent plate 33 protects the solid-state light emitting element 31 and the like disposed inside the lighting device 1. In addition, the protective translucent plate 33 plays a role of diffusing light emitted from the solid state light emitting device 31. The light emitted from the solid state light emitting element 31 has a strong directivity and tends to be irradiated locally. By diffusing the light emitted from the solid state light emitting element 31 with the surface-treated protective translucent plate 33, the directivity of the light can be weakened and the light can be uniformly irradiated over a wide area.

  The terminal pin 4 is formed on the terminal portion 3. The terminal pin 4 has the same mechanism and dimensions as the terminal pin 4 used in a general straight tube fluorescent lamp. The terminal pin 4 introduces electric power from the outside to the inside of the lighting device 1. Moreover, the terminal pin 4 functions also as a nozzle | cap | die at the time of fixing the illuminating device 1 to the support tool 41 as shown in FIG. That is, as shown in FIG. 5, the illuminating device 1 can be used as it is attached to a general support 41 for a straight tube fluorescent lamp.

The substrate 32 is disposed inside a hollow structure formed by the casing unit 2 and the protective translucent plate 33. The substrate 32 is formed on the surface of the surface facing the protective translucent plate 33 inside the hollow structure. The substrate 32 is made of a metal having a high thermal conductivity (preferably, a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). Preferably, the casing 2 is made of the same material. For example, the substrate 32 is made of aluminum.

  The plurality of solid state light emitting devices 31 are disposed on the substrate 32. The plurality of solid state light emitting elements 31 are, for example, light emitting diodes. The solid state light emitting device 31 is a so-called high power light emitting diode with a power consumption per unit of 1 W or more, and is a surface mount type light emitting diode. A high power light emitting diode has high luminous intensity and is suitable for lighting device applications. When the illumination device 1 is used as general illumination, the emission color of the solid-state light emitting element 31 to be used is preferably daylight, daylight white, white, warm white, or light bulb color. Specifically, for example, the plurality of solid-state light emitting elements 31 include a daylight color, a daylight white color, a white color, and a warm white color defined in 4.2 “Chromaticity range” of JISZ9112 “Classification by light source color and color rendering of fluorescent lamp”. Or it emits light bulb-colored light.

  The plurality of solid state light emitting devices 31 may emit blue light having a peak wavelength of 380 to 500 nm. Blue is said to have an effect of suppressing mental excitement. Therefore, the illumination device 1 that emits blue light is suitable as a security light.

  By the way, the high power light emitting diode used for the solid state light emitting device 31 has a large power consumption, and accordingly, the energy released as heat is also large. Therefore, if this heat is accumulated in the vicinity of the high-power light emitting diode, it causes a decrease in luminous intensity, deterioration of life characteristics, and the like. Therefore, it is important to handle this heat appropriately.

  Therefore, the high power light emitting diode used for the solid state light emitting device 31 is a surface mount type light emitting diode. The reason why the surface-mount type light emitting diode is used is that the electrode area of the light emitting diode itself is large, and therefore the area in contact with the substrate 32 is large. That is, in the surface mount type light emitting diode, the generated heat can be efficiently conducted to the substrate 32.

  However, if the substrate 32 is not formed of a material having good thermal conductivity, heat will accumulate in the vicinity of the high power light emitting diode. Therefore, in the lighting device 1, the casing 2 and the substrate 32 are made of aluminum having good thermal conductivity as described above. Thereby, the heat generated by the high-power light-emitting diode used for the solid-state light-emitting element 31 can be diffused throughout the housing 2 via the substrate 32.

  In addition, it is important that the housing unit 2 and the substrate 32 are closely attached as much as possible so that air does not enter between the housing unit 2 and the substrate 32. This is because, if a large amount of air enters between the casing unit 2 and the substrate 32, the heat conduction from the substrate 32 to the casing unit 2 is hindered by the air. For this reason, it is preferable to sandwich an adhesive material (for example, an adhesive or a double-sided tape without a base material) between the casing 2 and the substrate 32 to improve the adhesion between them. Furthermore, it is more preferable to perform press work in a state where an adhesive material is sandwiched between the housing portion 2 and the substrate 32 to further improve the adhesion between the two.

  It is also preferable to divide the substrate 32 into a plurality of parts. This is because, when the linear expansion coefficients of the casing unit 2 and the substrate 32 are different, the adhesion between the casing unit 2 and the substrate 32 is prevented from deteriorating when the temperature of the lighting device 1 rises. By dividing the substrate 32 and shortening the length in the longitudinal direction, the amount of expansion per sheet can be reduced. Thereby, it becomes easy to absorb the difference in expansion between the housing portion 2 and the substrate 32 with an adhesive material, and the adhesion between the housing portion 2 and the substrate 32 is easily maintained. This method of dividing the substrate 32 is particularly effective when the length of the lighting device 1 in the longitudinal direction is long.

  As described above, the heat generated in the high-power light-emitting diode used for the solid-state light-emitting element 31 can be efficiently diffused throughout the casing 2.

  Further, by forming a hollow structure (hollow part 51, outlet 21 and inlet 5) in the housing part 2 of the lighting device 1, the convection of the surrounding air is utilized, and the interior of the lighting device 1 can be efficiently performed. The generated heat can be released into the air. This will be described below with reference to the drawings.

  As shown in FIG. 6, the lighting device 1 supports the light emission toward the ground surface direction (here, the ground surface direction means the floor surface direction when indoors and the ground direction when outdoors). It is attached to the tool 41.

  The hollow part 51 is a hollow structure formed in a columnar shape in the longitudinal direction of the housing part 2. The hollow portion 51 is formed at two locations on the opposite side to the light emitting direction of the solid light emitting element 31 with respect to the position where the substrate 32 is disposed inside the housing portion 2. That is, the hollow portion 51 is formed on the upper side of the solid light emitting element 31 and the substrate 32 when the light emitting direction of the lighting device 1 (the lower direction in FIG. 6) is the lower side. The lower surface of each of the hollow portions 51 is substantially planar, and the upper surface of the hollow portion 51 has a substantially planar cross-sectional shape. The hollow portion 51 is connected to the outside of the lighting device 1 through the inflow port 5 and the outflow port 21.

  The outlet 21 is a through-hole that extends from the upper surface of the hollow portion 51 to the outside of the upper surface of the housing portion 2. The outlet 21 is a hole serving as an outlet for fluid (air) from the inside of the hollow portion 51. The plurality of outlets 21 are formed along the longitudinal direction of the housing part 2. The plurality of outlets 21 are formed at equal intervals in series at positions on the opposite side of the light emitting direction of the solid state light emitting element 31 of the housing unit 2. The lighting device 1 is attached to the support tool 41 so that the outlet 21 faces the support tool 41. That is, in the state where the lighting device 1 is attached to the support 41, the outlet 21 is substantially in the upward direction (preferably within the range of 0 degrees to 30 degrees with respect to the upward direction. If it is, it means the ceiling direction, and if it is outdoors, it means the sky direction.)

  The inflow port 5 is a through hole that extends from the hollow portion 51 to the outside of both side surfaces of the housing portion 2. The inflow port 5 is a hole serving as an inlet for fluid (air) into the hollow portion 51. The plurality of inflow ports 5 are formed on both side surfaces with respect to the light emitting direction of the solid state light emitting element 31 of the housing unit 2. The plurality of inflow ports 5 formed on each side surface of the housing part 2 are arranged in series in the longitudinal direction of the housing part 2. Further, the position of the inflow port 5 on the side surface of the housing portion 2 is formed below the hollow portion 51 (light emission direction of the solid light emitting element 31). That is, the direction from the surface of the housing part 2 of the inflow port 5 to the hollow part 51 is an obliquely upward direction (an obliquely upward direction in FIG. 6). For example, the angle between the direction from the hollow part 51 side of the inlet 5 to the surface side of the housing part 2 and the direction from the surface side of the housing part 2 to the hollow part 51 side of the outlet 21 is 45 degrees. .

  In addition, the cross-sectional shape of the hollow part 51 is not limited to the above-mentioned shape, The partial shape should just be a streamline type. Preferably, the shape of the surface (upward direction in FIG. 6) opposite to the light emitting direction of the solid light emitting element 31 in the hollow portion 51 may be a streamline type. The streamlined type here refers to a shape in which air can move smoothly on its surface. By making the shape of the surface of the hollow portion 51 opposite to the light emitting direction of the solid light emitting element 31 a streamlined shape, air flows smoothly in the hollow portion 51, so that heat can be efficiently dissipated from the housing portion 2 into the air. It can be carried out.

  Moreover, the shape of the lower surface of the hollow part 51 does not need to be planar. In addition, the distance from the solid light emitting element 31 to the hollow part 51 can be made uniform by making the shape of the lower surface of the hollow part 51 planar. Moreover, the hollow part 51 can be formed easily.

  Moreover, one hollow part 51 may be formed in the housing | casing part 2, and the several hollow part 51 arrange | positioned in the longitudinal direction of the housing | casing part 2 at a line form may be formed.

  Further, the outer shape of the housing portion 2 is not limited to the above-described cross-sectional shape. For example, the housing part 2 and the protective translucent plate 33 each have a substantially half-pipe shape, and the cross section becomes a cylindrical shape by combining the housing part 2 and the protective translucent plate 33 integrally. May be. The upper surface shape of the housing part 2 is similar to the shape of the upper surface of the hollow part 51, but may be a different shape.

  In addition, it is preferable that the upper surface shape of the housing | casing part 2 is a streamline type. Thereby, since air flows smoothly in the upper surface of the housing | casing part 2, the thermal radiation from the housing | casing part 2 in the air can be performed efficiently.

  Moreover, the shape and number of the inflow port 5 and the outflow port 21 are one example, and are not limited thereto. The shape and number of the inflow port 5 and the outflow port 21 may be arbitrarily determined in consideration of processing costs and the like.

  For example, in the outlet 21, one gap is formed along the longitudinal direction of the casing 2, but a plurality of gaps may be arranged in a row in the longitudinal direction of the casing 2. The shape of the outlet 21 is not limited to a rectangle, and may be any shape such as a circle and an ellipse.

  Further, the number of the inflow ports 5 may be an arbitrary number. For example, the inflow ports 5 having the same shape as the outflow ports 21 may be formed on both side surfaces of the housing portion 2. Moreover, the shape of the inflow port 5 is not limited to the above, and may be any shape such as an ellipse or a rectangle.

  Further, the angle between the direction from the hollow part 51 side of the inlet 5 to the surface side of the casing part 2 and the direction from the surface side of the casing part 2 to the hollow part 51 side of the outlet 21 is limited to 45 degrees. Is not to be done. The angle between the direction from the hollow portion 51 side of the inlet 5 to the surface side of the housing portion 2 and the direction from the surface side of the housing portion 2 to the hollow portion 51 side of the outlet port 21 is 0 to 90 degrees. The range may be arbitrarily set in accordance with the shape of the lighting device 1 or the like. Thereby, the warmed air around the lighting device can efficiently flow into the hollow portion 51 from the inflow port 5. Further, the air that has flowed into the hollow portion 51 can be efficiently discharged to the outside.

Next, the heat dissipation mechanism of the lighting device 1 will be described.
FIG. 7 is a diagram illustrating the flow of air in a state where the lighting device 1 is energized. FIG. 7 is a cross-sectional view showing the structure of the illumination device 1 and the support tool 41 in the C1-C2 diagram of FIG.

  The heat generated in the solid state light emitting device 31 is diffused throughout the housing 2 via the substrate 32. The heat diffused in the housing part 2 is released into the air using convection effectively.

  Specifically, first, the air around the casing 2 is heated by the heat diffused in the casing 2 and becomes an ascending current. A part of the air that has become the updraft flows on the surface of the outer surface 61 of the housing 2. This air rises while receiving the heat of the outer surface 61. That is, heat is released from the outer surface 61 to the air.

  Further, another part of the air that has become the updraft flows into the hollow portion 51 from the inflow port 5. The inflowing air flows out of the hollow portion 51 again from the outlet 21 while receiving the heat of the inner surface 62. This air rises while receiving the heat of the internal surface 62. That is, heat is released from the inner surface 62 to the air. At this time, air flows more smoothly because a part of the shape of the hollow portion 51 is streamlined. Therefore, the efficiency related to heat release is further increased.

  Thus, the illuminating device 1 can efficiently utilize the effect of ascending airflow by heating the air, that is, convection. Further, the lighting device 1 can dissipate heat not only from the outer surface 61 but also from the inner surface 62. Moreover, since the illuminating device 1 can dissipate heat over a wide area, the heat generated by the solid light emitting element 31 and diffused throughout the housing 2 can be effectively released into the air.

  Even when the lighting device 1 is mounted on the support 41 so that light is emitted in a direction other than the ground surface, ascending airflow is naturally generated by heating the air, and heat dissipation corresponding to the mounting state is generated. It goes without saying that it is done.

Next, the circuit configuration of the illumination device 1 of the present invention will be described below.
FIG. 8 is a circuit configuration diagram of the illumination device 1 of the device of the present invention.

The AC power supply 71 is an external AC power supply that supplies power to the lighting device 1.
The conversion circuit 72 is a circuit that converts AC power into DC power, and is configured by, for example, a diode bridge circuit. The conversion circuit 72 converts AC power supplied from the AC power supply 71 into DC power, and supplies a voltage V ₇₁ of 100 V, for example.

  The solid state light emitting device 31 corresponds to the solid state light emitting device according to the present invention, and generates light by the voltage supplied from the voltage supply means. Specifically, the solid-state light emitting element 31 is a so-called high power light emitting diode whose power consumption per unit is 1 W or more, and is a surface mount type light emitting diode that generates light by a supplied voltage.

The solid light emitting element array 73 corresponds to the plurality of solid state light emitting elements connected in series according to the present invention, and is supplied with a voltage from the voltage supply means. Specifically, the solid light emitting element array 73 is formed by connecting a plurality of solid light emitting elements 31 (M solid light emitting elements) in series. A voltage V ₇₁ from an AC power supply ₇₁ is applied to the solid light emitting element array 73.

The forward voltage V _f applied to each of the M solid light emitting elements 31 of the solid light emitting element array 73 is a voltage having a magnitude 1 / M of the voltage V ₇₁ from the AC power supply 71.

In other words, the number M of the solid state light emitting elements 31 constituting the solid state light emitting element array 73 is obtained by dividing the voltage V ₇₁ supplied from the AC power source 71 and output by the conversion circuit 72 by the forward voltage V _f of the solid state light emitting element 31. Is approximately equal to

Further, it is preferable that a voltage V ₃₁ is applied to each of the M solid light emitting elements 31 of the solid light emitting element array 73 so as to have a current equal to or less than 1/3 of the maximum rated current of the solid light emitting elements 31.

The reason will be explained. FIG. 9 is an example of characteristic information in which the forward voltage V _f with respect to the operating point P of the solid state light emitting device 31 is plotted. Here, the operating point P is calculated by the product of the current I and the forward voltage V _f based on the forward voltage V _f generated when the current I flows through the solid state light emitting device 31. In addition, the operating point P at the maximum rated current I _max of the solid state light emitting device 31 is particularly referred to as a maximum operating point P _max . Here, the maximum rated current I _max of the solid state light emitting device 31 is the maximum current at the rated current determined by the standard that can be applied to the solid state light emitting device 31. In FIG. 9, the operating point P is displayed as an arbitrary unit, and each maximum operating point P _max is normalized to 1. As can be seen from FIG. 9, the forward voltage V _f increases as the operating point P increases.

FIG. 10 is characteristic information showing the characteristic of the luminous efficiency η with respect to the operating point P of the solid state light emitting device 31 in FIG. Here, the luminous efficiency η is calculated from the operating point P and the ratio of the amount of emitted light at the operating point, that is, (the amount of emitted light / the operating point). In FIG. 10, the luminous efficiency η at the maximum operating point P _max is normalized as 1. FIG. 10 shows that the luminous efficiency η takes a minimum value at the maximum operating point P _max and increases as the operating point P decreases.

From the above, in order to operate the solid light emitting element 31 efficiently, in other words, to reduce the heat generated as a loss, it is important to operate the solid light emitting element 31 at a low operating point P. Further, the light emitting efficiency is better when the solid state light emitting element 31 is operated at the lower operating point P. From the above, it is preferable to operate the solid state light emitting device 31 at a position lower than the maximum operating point _Pmax (preferably a position equal to or less than 1/3 of the maximum operating point _Pmax ). This is represented by the following relational expression.

V _f = 1 / M × V ₇₁ ≦ V ₃₁
V ₃₁ ≦ P _max / (1/3 × I _max )

The illuminating device 1 includes a plurality of solid light emitting element rows 73, and the plurality of solid light emitting element rows 73 are connected in parallel. In FIG. 9, five solid light emitting element arrays 73 are connected in parallel, but the present invention is not limited to this. The parallel number of the plurality of solid-state light emitting element arrays 73 connected in parallel constituting the lighting device 1 (hereinafter referred to as “S”) is a light emission amount required by the lighting device 1 (hereinafter referred to as a light emission amount LT). )). That is, M times the amount of emitted light when the forward voltage V _f is applied to each of the solid state light emitting elements 31 (hereinafter referred to as the amount of emitted light L1) is the amount of emitted light per row (hereinafter referred to as the amount of emitted light). L2). The parallel number of the plurality of solid-state light emitting element rows 73 connected in parallel constituting the illumination device 1 is a value obtained by dividing the light emission amount LT required by the illumination device 1 by the light emission amount L2 per row of the solid light-emitting element rows. Is approximately equal.

This is represented by the following relational expression.
L2 = L1 x M
LT = L2 × S

  Next, the number of solid-state light-emitting elements 31 constituting each solid-state light-emitting element array 73 connected in parallel to the illumination apparatus 1 is determined from the performance required of the illumination apparatus 1 and the characteristic information of the solid-state light-emitting elements 31. Processing will be described below.

  FIG. 11 is a flowchart for explaining a process of determining the number of solid-state light emitting elements 31 constituting each solid-state light-emitting element array 73 connected in parallel in the lighting device 1 according to Embodiment 1 of the present invention.

  First, the voltage applied to the illuminating device 1 as a performance requested | required of the illuminating device 1 is determined (S101).

Next, the characteristic information of the solid light emitting element 31 is acquired (S102). For example, information such as the forward voltage V _f of the solid state light emitting element 31 at the operating point shown in FIGS. 9 and 10 and the light emission efficiency of the solid state light emitting element 31 at the operating point is acquired.

  Next, the voltage to be applied to the solid state light emitting element 31 is determined from the acquired characteristic information of the solid state light emitting element 31 (S103).

Next, the number of solid state light emitting elements 31 connected in series is determined (S104).
According to the above processing procedure, the number of solid state light emitting elements 31 constituting each solid state light emitting element array 73 connected in parallel in the lighting device 1 can be determined.

Hereinafter, the first embodiment of the present invention will be described in more detail with reference to specific examples.
As an example, the voltage V output from the conversion circuit 72 is 100 [V], and the operating point is 0.3 [a. u. ], The number of solid state light emitting elements 31 constituting the solid state light emitting element array 73 is calculated. Here, the operating point is 0.3 [a. u. As described above, the forward voltage V _f applied to the solid state light emitting element 31 is such that the current flowing through the solid state light emitting element 31 is not more than 1/3 of the maximum rated current of the solid state light emitting element 31. It is for setting to become.

  FIG. 12A is a diagram showing the performance required for the lighting device 1 according to Embodiment 1 of the present invention.

  In FIG. 12B, the characteristic information of the solid-state light emitting element 31 used in the configuration of the lighting device 1 according to Embodiment 1 of the present invention and the number of the solid-state light emitting elements 31 used in the lighting device 1 are determined using the characteristic information. It is a figure explaining this.

  First, the voltage applied to the lighting device 1 as the performance required for the lighting device 1 is determined as 100 [V] from FIG. 12A.

  Next, characteristic information of the solid state light emitting device 31 is acquired. Here, the acquired characteristic information of the solid state light emitting device 31 is shown on the left side of FIG. 12B.

Next, a voltage to be applied to the solid light emitting element is determined from the acquired characteristic information of the solid light emitting element 31. Here, as described above, the forward voltage V _f applied to the solid state light emitting device 31 is such that the current flowing through the solid state light emitting device 31 is equal to or less than 1/3 of the maximum rated current of the solid state light emitting device 31. decide. The operating point P at the maximum rated current I _max of the solid state light emitting device 31 is the maximum operating point P _max 1 [a. u. ] Is shown. Therefore, the operating point of the solid state light emitting device 31 is 0.3 [a. u. ], The value of the forward voltage V _f of the solid state light emitting device 31 is 3.2 [V] based on FIG. 12B.

Next, the number of solid state light emitting elements 31 connected in series is determined. Here, from 31.3, which is a value obtained by dividing the voltage V = 100 [V] by the forward voltage V _f = 3.2 [V], the number of the solid state light emitting elements 31 constituting the solid state light emitting element array 73 is It is calculated as 31 pieces.

  As described above, it is possible to determine the number of solid-state light-emitting elements 31 constituting each solid-state light-emitting element array 73 connected in parallel in the lighting device 1.

  In addition, the parallel number S of the plurality of solid-state light emitting element rows 73 that are connected in parallel to configure the lighting device 1 is calculated. As described above, the lighting device 1 is determined according to the required light emission amount LT. Specifically, the parallel number S of the plurality of solid-state light emitting element rows 73 that are connected in parallel to configure the lighting device 1 determines the light emission amount LT required by the lighting device 1 to emit light per row of the solid-state light emitting element rows. It is substantially equal to the value divided by the light quantity L2.

  First, the light emission amount LT is determined as the performance required for the illumination device 1. Here, as shown in FIG. u. ] Is determined.

  Next, from the number of solid light emitting elements 31 included in one row of solid light emitting element rows 73, a light emission amount L2 per one row of solid light emitting element rows 73 is calculated. Here, from FIG. 12B, the light emission quantity L2 is 14.4 [a. u. ] Is calculated. Specifically, the total energy consumption per one row of the solid light emitting element rows 73 is 31 [a. u. ] Is multiplied by 9.3 [a. u. ] Is calculated. The total amount of emitted light per one row of the solid light emitting element rows 73 is 0.3 [a. u. ] And a total energy consumption of 9.3 [a. u. ] To obtain 14.4 [a. u. ] Is calculated.

  Next, the number of parallel solid-state light emitting element rows 73 connected in parallel necessary for the lighting device 1 is determined. The total amount of emitted light per one row of the solid light emitting element rows 73 is 14.4 [a. u. Therefore, the parallel number of the solid-state light emitting element rows 73 connected in parallel necessary for the lighting device 1 is determined to be 14.

  Here, the total energy consumption of the lighting device 1 is 129 [a. u. ]. The total energy consumption of the lighting device 1 is the total energy consumption 9.3 [a. u. ] Is multiplied by the number of solid light emitting element arrays 73 connected in parallel necessary for the lighting device 1.

  From the above, it is possible to calculate the parallel number S of the plurality of solid state light emitting element rows 73 provided in parallel in the lighting device 1.

On the other hand, the voltage V output from the conversion circuit 72 is 100 [V] under the same conditions, and the operating point of the solid state light emitting device 31 is 0.8 [a. u. ], The forward voltage of the solid-state light emitting device is V _f = 3.8 [V] based on FIG. 12B. Therefore, the number of solid light emitting elements 31 constituting the solid light emitting element array 73 is calculated as 26. Accordingly, the total energy consumption per one row of the solid light emitting element rows 73 in this case is 26 operating points of 0.8 [a. u. ] To obtain 20.8 [a. u. ] Is calculated. The total amount of emitted light per one row of the solid light emitting element rows 73 is 0.8 [a. u. ] And the total energy consumption 20.8 [a. u. ] 23.5 [a. u. ] Is calculated. The total amount of emitted light per one row of the solid light emitting element rows 73 is 23.5 [a. u. Therefore, the number of the solid light emitting element arrays 73 necessary for the lighting device 1 is determined to be 8.5. At this time, the total energy consumption of the lighting device 1 is 176.8 [a. u. ].

  As described above, in the lighting device 1, the operating point of the solid state light emitting element 31 is 0.8 [a. u. ] In the case of total energy consumption 129 [a. u. ] And the operating point of the solid state light emitting device 31 is 0.3 [a. u. ], The total energy consumption 176.8 [a. u. ], It is possible to reduce the total energy consumption by about 30% while maintaining the same total light emission amount. That is, by lowering the operating point of the solid state light emitting element 31, not only the heat generated from the solid state light emitting element 31 constituting the lighting device 1 can be reduced, but also the total energy consumption of the lighting device 1 can be reduced. Furthermore, as described above, heat generated from the solid state light emitting elements 31 constituting the lighting device 1 can be reduced by the heat dissipation mechanism using convection in the lighting device 1. As a result, the long lifetime characteristic of the solid state light emitting device 31 can be enjoyed to the maximum. Therefore, it can be said that there is no cost demerit in the lighting device 1 using a large number of the solid state light emitting elements 31.

  The luminous efficiency of the high-power light-emitting diode used as the solid-state light-emitting element 31 in Embodiment 1 of the present invention has been improved year by year, and at present, almost the same efficiency as that of a fluorescent lamp has been achieved.

  However, the reduction of the total energy consumption that can be realized by the present invention realizes so-called energy saving, and according to the present invention, it is possible to further increase the light emission efficiency of the high power light emitting diode used as the solid state light emitting element 31. In addition, it is possible to provide the lighting device 1 that can achieve real energy saving compared to a fluorescent lamp.

In the first embodiment of the present invention, the forward voltage V _f applied to the solid state light emitting element 31 is such that the current flowing through the solid state light emitting element 31 is not more than 1/3 of the maximum rated current of the solid state light emitting element 31. Although the example of determining so as to be described has been described, the current flowing through the solid-state light emitting element 31 may be 1/2 or less than the maximum rated current of the solid-state light emitting element 31, or the current flowing through the solid-state light emitting element 31 may be The forward voltage V _f applied to the solid light emitting element 31 may be determined so that the current is 1 / N (N is a number of 2 or more) of the maximum rated current of the solid light emitting element 31.

  Moreover, the illuminating device 1 of this invention is not limited to the said Example, It can deform | transform and implement freely in the range which does not deviate from the meaning of this invention. In the present embodiment, the illumination device 1 is of a type that can be applied to a general fluorescent lamp support 41. However, the illumination device 1 is of a type that uses a dedicated instrument, or directly receives commercial power supply without using an instrument. It may be realized as a type.

  Moreover, it is good also considering the illuminating device 1 as a cyclic | annular form by forming the housing | casing part 2 and the translucent board 33 for protection in a ring shape.

(Modification)
Next, the number of solid-state light-emitting elements 31 constituting each solid-state light-emitting element array 73 connected in parallel to the illumination apparatus 1 is determined from the performance required for the illumination apparatus 1 and the characteristic information of the solid-state light-emitting elements 31. A modified example of the processing will be described.

  In the first embodiment, the voltage to be applied to the solid state light emitting elements 31 is determined from the characteristic information of the solid state light emitting elements 31, and the number of the solid state light emitting element arrays 73 is efficiently calculated. In this modification, by using a design support apparatus such as a computer, the number and amount of energy of the solid light emitting element array 73 are calculated based on the characteristic information of the solid light emitting element 31, and the optimum result is obtained from the calculation result. The number of solid light emitting element rows 73 is determined.

  FIG. 13 is a flowchart for explaining processing for determining the number of solid-state light-emitting elements 31 constituting each solid-state light-emitting element array 73 connected in parallel in the illumination device 1 according to the modification of the first embodiment of the present invention. .

  First, the performance required for the lighting device 1 is determined (S201). Here, the performance required for the lighting device 1 is, for example, a voltage applied to the lighting device 1, a total light emission amount required for the lighting device 1, that is, brightness, and the like.

  Next, the maximum number of solid-state light emitting elements 31 that can be used in the lighting device 1 is calculated (S202). Here, it is calculated how many solid state light emitting elements 31 are physically included in the lighting device 1. For example, the maximum number of solid-state light-emitting elements 31 that can be used in the lighting device 1 is determined from the size of the solid-state light-emitting elements 31 and the size of the lighting device 1.

Next, the characteristic information of the solid light emitting element 31 is acquired (S203). For example, as shown in FIG. 9 and FIG. 10, information on the forward voltage V _f of the solid state light emitting element 31 at the operating point and the luminous efficiency of the solid state light emitting element 31 at the operating point are acquired.

  Next, based on the acquired characteristic information of the solid state light emitting element 31, the number of solid state light emitting elements 31 included in the solid state light emitting element array 73 and the total light emission amount of the solid state light emitting element array 73 corresponding to the number of solid state light emitting elements 31 are calculated. The created table is created (S204). Here, the total energy consumption amount of emitted light of the solid light emitting element row 73 according to the number of solid light emitting elements 31 constituting the solid light emitting element row 73 may be calculated.

  Next, a table in which the number of solid light emitting element rows 73 connected in parallel (hereinafter referred to as the parallel number) and the total number of solid light emitting elements 31 corresponding to the parallel number of the solid light emitting element rows 73 is created. (S205). Here, you may calculate the energy consumption of the illuminating device 1 corresponding to the parallel number of the solid light emitting element row | line | column 73. FIG.

  Next, from the table in which the total number of solid state light emitting elements 31 corresponding to the number of parallel solid state light emitting element arrays 73 is calculated, the solid state light emitting element arrays are within a range equal to or less than the maximum number of solid state light emitting elements 31 that can be used in the lighting device 1. The largest total number of solid state light emitting elements 31 corresponding to the parallel number of 73 is determined (S206).

  According to the above processing procedure, the number of solid state light emitting elements 31 constituting each solid state light emitting element array 73 connected in parallel in the lighting device 1 can be determined.

  FIG. 14A is a diagram showing the performance required for the lighting device 1 in the modification of the first embodiment of the present invention.

  FIG. 14B illustrates the characteristic information of the solid state light emitting element 31 and the number of solid state light emitting elements 31 used in the lighting device 1 determined using the characteristic information in the modification of the first embodiment of the present invention. It is a figure to do.

  First, the performance required for the lighting device 1 is determined from FIG. 14A. Here, the voltage applied to the lighting device 1 is 100 [V], and the total amount of emitted light required for the lighting device 1 is 200 [a. u. ] Is determined.

  Next, the maximum number of solid state light emitting elements 31 that can be used in the lighting device 1 is calculated. Here, it is assumed that the upper limit is calculated as 500.

  Next, characteristic information of the solid state light emitting device 31 is acquired. Here, the acquired characteristic information of the solid state light emitting device 31 is shown on the left side of FIG. 14B.

  Next, based on the acquired characteristic information of the solid state light emitting element 31, the number of solid state light emitting elements 31 included in the solid state light emitting element array 73 and the total light emission amount of the solid state light emitting element array 73 corresponding to the number of solid state light emitting elements 31 are calculated. Create the table. Here, as shown in the item table for the solid light emitting element array 73 in FIG. 14B, the total energy consumption amount of light emission of the solid light emitting element array 73 corresponding to the number of solid light emitting elements 31 included in the solid light emitting element array 73 is also simultaneously performed. Calculated.

  Next, a table in which the number of solid light emitting element rows 73 connected in parallel and the total number of solid light emitting elements 31 corresponding to the number of parallel solid light emitting element rows 73 is calculated is created. Here, as shown in the item table for the lighting device 1 in FIG. 14B, the energy consumption amount of the lighting device 1 corresponding to the parallel number of the solid light emitting element rows 73 is also calculated at the same time.

  Next, the table of FIG. 14B shows the largest total number of the solid state light emitting elements 31 corresponding to the parallel number of the solid state light emitting element arrays 73 within the range of the maximum number of the solid state light emitting elements 31 that can be used in the lighting device 1 calculated. Use to determine. As a result, the operating point of the solid state light emitting device 31 is 0.3 [a. u. ] The number of solid light emitting elements 31 constituting the solid light emitting element array 73 is determined to be 31, and the number of solid light emitting element arrays 73 is determined to be 14.

  According to the processing procedure as described above, the parallel number 14 of the solid light emitting element rows 73 connected in parallel of the lighting device 1 and 430 which is the number of solid light emitting elements 31 constituting the lighting device 1 can be determined. .

  From the above, by using the table of FIG. 14B, in the lighting device 1, for example, the operating point of the solid state light emitting element 31 is 0.3 [a. u. ] In the case of total energy consumption 129 [a. u. ] And the operating point of the solid state light emitting device 31 is 0.8 [a. u. ], The total energy consumption 176.8 [a. u. ] Can be compared. As a result, it can be seen that the total energy consumption can be reduced by about 30% while maintaining the same total light emission amount. Therefore, by lowering the operating point of the solid state light emitting element 31, not only the heat generated from the solid state light emitting element 31 constituting the lighting device 1 can be reduced, but also the total energy consumption of the lighting device 1 can be reduced. Furthermore, as described above, heat generated from the solid state light emitting elements 31 constituting the lighting device 1 can be reduced by the heat dissipation mechanism using convection in the lighting device 1.

(Embodiment 2)
The lighting device according to Embodiment 2 of the present invention includes two diode bridge circuits, so that the terminal pair to which AC power is not supplied from the outside is not affected by AC power supplied from the outside. Thereby, the illuminating device according to Embodiment 2 of the present invention can be used in place of fluorescent lamps for various types of fluorescent lamp support.

First, the configuration of the lighting apparatus according to Embodiment 2 of the present invention will be described.
FIG. 15 is a perspective view showing an appearance of lighting apparatus 101 according to Embodiment 2 of the present invention. FIG. 16 is a plan view from the side surface (direction A shown in FIG. 15) of lighting apparatus 101 according to Embodiment 2 of the present invention. FIG. 17 is a plan view from the top surface (direction B shown in FIG. 15) of lighting apparatus 101 according to Embodiment 2 of the present invention. FIG. 18 is a cross-sectional view showing the structure of the lighting device 101 on the C1-C2 plane shown in FIG. FIG. 19 is a diagram showing a state in which the illumination device 101 is attached to a support 141 for a straight tube fluorescent lamp.

  As shown in FIGS. 15, 16, and 17, the lighting device 101 includes a housing portion 102, a terminal portion 103, terminal pins 104 a, 4 b, 4 c, and 4 d, and a protective translucent plate 133. Note that the terminal pins 104a, 4b, 4c, and 4d are referred to as terminal pins 104 unless otherwise distinguished.

  As shown in FIG. 18, the lighting device 101 further includes a plurality of solid state light emitting devices 131, a substrate 132, an input circuit 134, a DC conversion circuit 135, an adjustment circuit 136, A protection circuit 137.

  The illumination device 101 has the same dimensions as a general straight tube fluorescent lamp. For example, the lighting device 101 has the same dimensions as any of the straight tube fluorescent lamps defined in 2.3.1 “List of data sheets” of JISC7617-2 “Straight tube fluorescent lamps—Part 2: Performance specification”. .

The casing 102 has a substantially U-shaped cross section. The casing 102 is made of a metal having a high thermal conductivity (preferably, a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). For example, the casing 102 is made of aluminum. The reason why aluminum is used for the housing 102 is that it is inexpensive, easy to mold, has good recyclability, has a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more, and heat dissipation characteristics. Is high.

  Further, it is desirable that the housing portion 102 be made of aluminum and then anodized. Alumite treatment increases the surface area and enhances the heat dissipation effect.

  The protective translucent plate 133 has translucency and is disposed in the light emitting direction of the solid light emitting element 131. The protective translucent plate 133 is formed in a flat plate shape. By integrally combining the housing 102 and the protective translucent plate 133, the cross section becomes a substantially square shape.

  The protective translucent plate 133 is made of transparent glass, acrylic resin, polycarbonate, or the like. Fine irregularities are unevenly formed on the front or back surface of the protective translucent plate 133 by surface treatment. This surface treatment can be easily performed, for example, by applying a sandblast method. The protective translucent plate 133 protects the solid light emitting element 131 and the like disposed inside the lighting device 101. Further, the protective translucent plate 133 plays a role of diffusing light emitted from the solid state light emitting device 131. The light emitted from the solid state light emitting element 131 has a strong directivity and tends to be irradiated locally. By diffusing the light emitted from the solid state light emitting element 131 by the protective translucent plate 133 that has been surface-treated, the directivity of the light can be weakened and the light can be uniformly irradiated over a wide area.

The terminal portion 103 is formed at both ends in the longitudinal direction of the housing portion 102.
The terminal pin 104 is formed on the terminal portion 103. The terminal pin 104 has the same mechanism and dimensions as the terminal pin used in a general straight tube fluorescent lamp. The terminal pin 104 introduces electric power from the outside to the inside of the lighting device 101. The terminal pin 104 also functions as a base when the lighting device 101 is fixed to a support 141 or the like as shown in FIG. That is, as shown in FIG. 5, the illumination device 101 can be used as it is attached to a general support 141 for a straight tube fluorescent lamp.

  The terminal pin 104 a and the terminal pin 104 b are formed at one end in the longitudinal direction of the housing unit 102. The terminal pin 104c and the terminal pin 104d are formed at the other end in the longitudinal direction of the housing portion 102.

The substrate 132 is disposed inside a hollow structure formed by the casing unit 102 and the protective translucent plate 133. The substrate 132 is formed on the surface of the surface facing the protective translucent plate 133 inside the hollow structure. The substrate 132 is made of a metal having a high thermal conductivity (preferably a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). Preferably, it is comprised with the same material as the housing | casing part 102. FIG. For example, the substrate 132 is made of aluminum.

  The plurality of solid state light emitting devices 131 are disposed on the substrate 132. The plurality of solid state light emitting devices 131 are, for example, light emitting diodes. The solid state light emitting device 131 is a so-called high power light emitting diode with a power consumption per unit of 1 W or more, and is a surface mount type light emitting diode. A high power light emitting diode has high luminous intensity and is suitable for lighting device applications. When the illuminating device 101 is used as general illumination, the emission color of the solid-state light emitting element 131 to be used is preferably daylight, daylight white, white, warm white, or light bulb color. Specifically, for example, the plurality of solid-state light emitting elements 131 include daylight colors, daylight whites, whites, warm whites defined in 4.2 “Chromaticity range” of JISZ9112 “Classification by light source color and color rendering of fluorescent lamps”. Or it emits light bulb-colored light.

  The plurality of solid state light emitting devices 131 may emit blue light having a peak wavelength of 380 to 500 nm. Blue is said to have an effect of suppressing mental excitement. Therefore, the illumination device 101 that emits blue light is suitable as a security light.

  The plurality of solid state light emitting devices 131 are connected in series. At this time, the total number of the solid-state light emitting elements 131 used is approximately equal to the sum (ΣVf) of the forward voltage (Vf) of each solid-state light emitting element 131 and the voltage (V) supplied from the DC conversion circuit 135. Selected as The conditions under which the inventors conducted experiments were that the voltage (V) supplied from the DC conversion circuit 135 was 100 V, and the forward voltage (Vf) of the solid state light emitting device 131 was 3.8 V. Therefore, in the second embodiment, the number of solid state light emitting elements 131 is 26. By doing so, the voltage (V) supplied from the DC conversion circuit 135 and the total forward voltage (ΣVf) of each solid state light emitting element 131 are balanced, and it is not necessary to provide a separate DC power source or the like. . Thereby, the cost of the illuminating device 101 can be reduced.

  In order to further increase the luminous intensity of the lighting device 101, a plurality of solid light emitting elements 131 connected in series as described above may be provided, and the solid light emitting elements 131 connected in series may be connected in parallel to each other. In view of this, the inventors provided two rows of solid light emitting elements 131 connected in series and connected the solid light emitting elements 131 connected in series to each other in parallel.

  The input circuit 134 is configured by a fixed resistor or the like. The input circuit 134 only needs to have a resistance component, and may be a thermistor, for example. The resistance value of the input circuit 134 is preferably about 1 kΩ to 100 kΩ.

  Here, among the supports for inverter type fluorescent lamps, there is a type that checks the continuity between the terminal pin 104a and the terminal pin 104b. A heater is provided between the terminal pin 104a and the terminal pin 104b of the fluorescent lamp. The support for the inverter type fluorescent lamp performs a continuity check to confirm whether or not the heater is normal. If this continuity check is not passed, the inverter fluorescent lamp supporter performs processing such as not supplying power to the fluorescent lamp.

  In response to this continuity check, an input circuit 134 is provided. By providing the input circuit 134, it is possible to pass a continuity check using a support for an inverter type fluorescent lamp. Thereby, the illuminating device 101 can be turned on also in a support for a fluorescent lamp lamp of a type for checking continuity. That is, the illuminating device 101 which concerns on Embodiment 2 of this invention can be used for the support tool for the fluorescent lamp lamps of the type which checks continuity. Note that the input circuit 134 may be provided between the terminal pin 104c and the terminal pin 104d, or between the terminal pin 104a and the terminal pin 104b and between the terminal pin 104c and the terminal pin 104d. May be provided.

  The DC conversion circuit 135 performs full-wave rectification on the AC power supplied from the terminal pin 104 and converts it to DC power. Since the solid state light emitting element 131 is a direct current drive element, it is necessary to convert alternating current power into direct current power.

  The adjustment circuit 136 includes a variable resistance element (not shown). The adjustment circuit 136 is a circuit for absorbing variations in the forward voltage (Vf) of the solid state light emitting device 131. Specifically, the forward voltage (Vf) of the solid state light emitting element 131 inevitably varies when the solid state light emitting element 131 is manufactured. For this reason, the total sum (ΣVf) of the forward voltage (Vf) of the solid state light emitting device 131 varies. Therefore, the balance between the sum (ΣVf) and the voltage (V) supplied from the DC conversion circuit 135 is lost. In order to avoid this, the adjustment circuit 136 performs correction.

  The protection circuit 137 is a protection circuit when an instantaneous high voltage is applied from the outside of the lighting apparatus 101 due to a disturbance. The protection circuit 137 is configured by a circuit including a capacitor element (not shown). The protection circuit 137 is provided for the purpose of protecting the solid state light emitting device 131.

  Here, as the solid state light emitting element 131, it is preferable to use a high power element for the lighting device, and a high power light emitting diode is used as described above. A high power light emitting diode consumes a large amount of power, and accordingly, a large amount of energy is released as heat. If this heat is accumulated in the vicinity of the light emitting diode, the luminous intensity of the light emitting diode is reduced and the life characteristics are deteriorated. Therefore, it is important to handle this heat appropriately.

  In view of the above, the surface-mount type light emitting diode is used. The surface-mount type light emitting diode has a large electrode area, and thus an area in contact with the substrate 132 becomes large. Therefore, the heat generated in the light emitting diode can be efficiently diffused to the substrate 132. However, if the substrate 132 is not formed of a material having good thermal conductivity, heat is accumulated in the vicinity of the light emitting diode. Accordingly, the lighting device 101 employs aluminum as the material of the substrate 132. Further, the casing 102 is also formed of aluminum. Aluminum has good thermal conductivity, and thus heat generated in the light emitting diode can be efficiently radiated from the housing portion 102 to the atmosphere via the substrate 132.

  Here, it is important that the housing portion 102 and the substrate 132 are brought into contact with each other. This is because, when air enters between the housing portion 102 and the substrate 132, heat conduction from the housing portion 102 to the substrate 132 is inhibited, and efficient heat treatment can be performed by inhibiting heat conduction. This is because it disappears. That is, it is preferable to increase the adhesion between the casing 102 and the substrate 132 by configuring the casing 102 and the substrate 132 with the same material. Furthermore, it is preferable to perform press working to further improve the adhesion between the casing 102 and the substrate 132.

  When performing the press work, an adhesive material (for example, a double-sided tape without an adhesive or a base material) (not shown) is sandwiched between the housing portion 102 and the substrate 132, and the two are in close contact with each other. It is preferable to improve the property.

  When using a double-sided tape, it is important to select one that does not contain a substrate. This is because the base material has low thermal conductivity, and thus heat conduction from the housing portion 102 to the substrate 132 is hindered.

  It is also preferable to divide the substrate 132 into a plurality of parts. This is to prevent deterioration of the adhesion between the casing 102 and the substrate 32 when the temperature of the lighting device 101 rises when the linear expansion coefficients of the casing 102 and the substrate 132 are different. is there. By dividing the substrate 132, the length in the longitudinal direction of each substrate 132 is shortened. Thereby, the expansion amount per one board | substrate 132 becomes small. Accordingly, the difference in expansion between the housing portion 102 and the substrate 132 can be easily absorbed by the adhesive material, and thus the adhesion between the housing portion 102 and the substrate 132 can be easily maintained. This method of dividing the substrate 132 is particularly effective when the length of the lighting device 101 in the longitudinal direction is long.

  In the above description, an example in which the casing unit 102 and the protective translucent plate 133 are integrally combined so that the lighting device 101 has a substantially square cross section has been described. However, the present invention is not limited to this. For example, each of the housing portion 102 and the protective translucent plate 133 has a substantially half-pipe shape. By combining the housing portion 102 and the protective translucent plate 133 integrally, the cross section of the lighting device 101 can be reduced. It may be cylindrical.

FIG. 20 is a diagram illustrating a circuit configuration of the lighting apparatus 101.
The input circuit 134 is connected between the terminal pin 104a and the terminal pin 104b. Note that the input circuit 134 may be connected between the terminal pin 104c and the terminal pin 104d. Further, two input circuits, that is, an input circuit connected between the terminal pin 104a and the terminal pin 104b and an input circuit connected between the terminal pin 104c and the terminal pin 104d may be formed.

  The DC conversion circuit 135 includes diode bridge circuits 155 and 156. The diode bridge circuits 155 and 156 convert AC power into DC power. The diode bridge circuits 155 and 156 are so-called full-wave rectifier circuits having a full-wave rectification function.

  The diode bridge circuit 155 is connected between the terminal pin 104a and the terminal pin 104c. That is, the terminal pin 104a and the terminal pin 104b are connected to the input terminal of the diode bridge circuit 155. The diode bridge circuit 155 converts AC power supplied from the outside to the terminal pins 104 a and 104 c into DC power and supplies the DC power to the plurality of solid state light emitting devices 131.

  The diode bridge circuit 156 is connected between the terminal pin 104b and the terminal pin 104d. That is, the terminal pin 104b and the terminal pin 104d are connected to the input terminal of the diode bridge circuit 155. The diode bridge circuit 156 converts AC power supplied from the outside to the terminal pins 104 b and 104 d into DC power and supplies the DC power to the plurality of solid state light emitting devices 131.

  Terminals 157 and 158 are output terminals of the DC conversion circuit 135, and the outputs of the diode bridge circuits 155 and 156 are connected in parallel.

  The diode bridge circuit 155 includes diodes D1, D2, D3, and D4. The anode of the diode D1 is connected to the terminal pin 104a, and the cathode is connected to the terminal 157. The anode of the diode D2 is connected to the terminal 158, and the cathode is connected to the terminal pin 104a. The anode of the diode D3 is connected to the terminal pin 104c, and the cathode is connected to the terminal 157. The anode of the diode D4 is connected to the terminal 158, and the cathode is connected to the terminal pin 104c.

  The diode bridge circuit 155 includes diodes D5, D6, D7, and D8. The anode of the diode D5 is connected to the terminal pin 104b, and the cathode is connected to the terminal 157. The anode of the diode D6 is connected to the terminal 158, and the cathode is connected to the terminal pin 104b. The anode of the diode D7 is connected to the terminal pin 104d, and the cathode is connected to the terminal 157. The anode of the diode D8 is connected to the terminal 158, and the cathode is connected to the terminal pin 104d.

  On the substrate 132, 26 solid light emitting elements 131 are mounted in series (not shown). The anode of the solid state light emitting devices 131 connected in series is connected to the terminal 157 via the adjustment circuit 136. The cathode of the solid state light emitting devices 131 connected in series is connected to the terminal 158.

  The adjustment circuit 136 is connected between the terminal 157 and the anode of the solid state light emitting device 131 connected in series.

  The protection circuit 137 is connected in parallel between the anode and cathode of the solid state light emitting devices 131 connected in series.

  Note that the connection between the terminal 157 and the terminal 158 and the substrate 132 may be a direct connection or a substantial connection through the adjustment circuit 136 or the like. That is, the outputs of the diode bridge circuits 155 and 156 and the substrate 132 may be directly connected, or may be connected via a resistor, a switch, or the like.

Next, the operation of the lighting device 101 will be described.
FIG. 21 is a diagram illustrating an example of a circuit configuration in a state where the illumination device 101 is attached to the support 141 as illustrated in FIG.

  The support 141 includes a plug 161, a switch 162, a ballast 163, and a glow lamp 164. The support tool 41 supplies AC power to the lighting device 101 via the terminal pin 104a and the terminal pin 104c.

  The plug 161 is, for example, a plug to which commercial power is supplied. The switch 162 is connected in series between the plug 161 and the ballast 163.

  The ballast 163 generates a high voltage pulse by the operation of the glow lamp 164. The ballast 163 is connected in series between the switch 162 and the terminal pin 104c.

The glow lamp 164 is connected between the terminal pin 104b and the terminal pin 104d.
When the switch 162 is turned on while commercial power is supplied to the plug 161, an alternating voltage is applied between the terminal pin 104 a and the terminal pin 104 c via the ballast 163.

  First, an operation when a positive voltage is applied to the terminal pin 104a and a negative voltage is applied to the terminal pin 104c will be described. When a positive voltage is applied to the terminal pin 104a and a negative voltage is applied to the terminal pin 104c, current flows in sequence from the terminal pin 104a through the diode D1, the terminal 157, the adjustment circuit 136, the substrate 132, the terminal 158, and the diode D4. It flows into 104c. At this time, no current flows through the path of the terminal pin 104b, the glow lamp 164, and the terminal pin 104d by the diode bridge circuit 156. Therefore, the glow lamp 164 does not operate.

  When a normal fluorescent lamp is used, the ballast 163 generates a high voltage pulse by the operation of the glow lamp 164. On the other hand, when the lighting apparatus 101 according to Embodiment 2 of the present invention is used, the glow lamp 164 does not operate, and the ballast 163 does not generate a high voltage pulse. When the ballast 163 generates a high voltage pulse, the solid state light emitting device 131 is damaged. When the lighting device 101 according to the second embodiment of the present invention is used, the ballast 163 does not generate a high voltage pulse, so that the solid state light emitting device 131 can be driven stably.

  Next, an operation when a negative voltage is applied to the terminal pin 104a and a positive voltage is applied to the terminal pin 104c will be described. When a negative voltage is applied to the terminal pin 104a and a positive voltage is applied to the terminal pin 104c, the current sequentially flows from the terminal pin 104c through the diode D3, the terminal 157, the adjustment circuit 136, the substrate 132, the terminal 158, and the diode D2. It flows into 104a. At this time, no current flows through the path of the terminal pin 104b, the glow lamp 164, and the terminal pin 104d by the diode bridge circuit 156. Therefore, the glow lamp 164 does not operate.

  As described above, since the glow lamp 164 does not operate when the illumination device 101 is attached to the support 141 as shown in FIG. 21, the illumination device 101 can operate stably. In the lighting device 101, a plug 161, a switch 162, and a ballast 163 are connected between the terminal pin 104b and the terminal pin 104d, and a glow lamp 164 is connected between the terminal pin 104a and the terminal pin 104c. Even in this case, it can operate stably as described above.

  Next, the case where an alternating voltage is applied to the terminal pin 104a and the terminal pin 104d in a state where the lighting device 101 is attached to the support 141 will be described.

  FIG. 22 is a diagram illustrating an example of a circuit configuration in a state where the lighting device 101 is attached to the support 141. In addition, the same code | symbol is attached | subjected to the element similar to FIG.

  The support 141 supplies AC power to the lighting device 101 via the terminal pin 104a and the terminal pin 104d.

  When the switch 162 is turned on while commercial power is supplied to the plug 161, an AC voltage is applied between the terminal pin 104a and the terminal pin 104d via the ballast 163.

  First, an operation when a positive voltage is applied to the terminal pin 104a and a negative voltage is applied to the terminal pin 104d will be described. When a positive voltage is applied to the terminal pin 104a and a negative voltage is applied to the terminal pin 104d, the current flows sequentially from the terminal pin 104a through the diode D1, the terminal 157, the adjustment circuit 136, the substrate 132, the terminal 158, and the diode D8. It flows into 104d. At this time, no current flows through the path of the terminal pin 104c, the glow lamp 164, and the terminal pin 104b by the diode bridge circuits 155 and 156. Therefore, the glow lamp 164 does not operate.

  Next, an operation when a negative voltage is applied to the terminal pin 104a and a positive voltage is applied to the terminal pin 104d will be described. When a negative voltage is applied to the terminal pin 104a and a positive voltage is applied to the terminal pin 104d, the current flows sequentially from the terminal pin 104d through the diode D7, the terminal 157, the adjustment circuit 136, the substrate 132, the terminal 158, and the diode D2. It flows into 104a. At this time, due to the diode bridge circuits 155 and 156, no current flows through the path of the terminal pin 104b, the glow lamp 164, and the terminal pin 104c. Therefore, the glow lamp 164 does not operate. Therefore, the solid state light emitting device 131 can be stably operated.

  As described above, since the glow lamp 164 does not operate when the lighting device 101 is attached to the support 141 as shown in FIG. 22, the lighting device 101 can operate stably. In the lighting device 101, a plug 161, a switch 162, and a ballast 163 are connected between the terminal pin 104b and the terminal pin 104c, and a glow lamp 164 is connected between the terminal pin 104a and the terminal pin 104d. Even in this case, it can operate stably as described above.

  As described above, the illumination device 101 according to Embodiment 2 of the present invention can be used without any modification to a general fluorescent lamp support 141. Therefore, since the lighting apparatus 101 according to the second embodiment of the present invention can be used without modifying the support 141, there is no incidental cost, and the feature of the light-emitting diode that is simply used as the solid-state light-emitting element 131 is obtained. You can use lighting that takes advantage of

  In the above description, the support 141 is a glow lamp lighting support, but the illumination device 101 is an inverter-type and rapid start-type support, as well as the illumination device 101 and the support. It can be used without any modification. As described above, in lighting device 101 according to Embodiment 2 of the present invention, one terminal set (for example, terminal pin 104b and terminal pin 104d in FIG. 20) is connected to the other terminal set (terminal pin). This is because the influence of the power supplied to 104a and the terminal pin 104c) does not appear.

  Here, in a conventional lighting device using a solid state light emitting device, a glow lamp lighting type support can be stably operated by physically removing the glow lamp from the support. However, the conventional lighting device using the solid light emitting element has a problem that it is necessary to physically remove the glow lamp, which is troublesome. In addition, the inverter type and rapid start type supports have a built-in circuit for driving the fluorescent lamp, and cannot be easily removed like a glow lamp. When a conventional lighting device using a solid light emitting element is used for an inverter type and rapid start type support, a high voltage or the like is applied to the lighting device, causing deterioration or damage of the solid light emitting element or the like. That is, a conventional lighting device using a solid state light emitting device cannot be used for an inverter type and rapid start type support.

  On the other hand, in the lighting device 101 according to the second embodiment of the present invention, the influence of the power supplied to the other terminal set does not appear in the one terminal set, so only the lamp for the glow lamp lighting method is used. In addition, the fluorescent lamp for the inverter type or rapid start type can also be used in place of the conventional fluorescent lamp.

  In addition, when operating the illuminating device 101 using an inverter-type support tool, it is preferable to use a high-speed response type diode for the diodes D1 to D8 included in the diode bridge circuits 155 and 156. Accordingly, the diode bridge circuits 155 and 156 can operate following the frequency of the voltage output from the inverter used in the inverter-type support.

  Specifically, the inverter used for the inverter-type support is designed to generate a frequency of 100 kHz or more in order to avoid frequencies in the audible region (20 kHz or less) and considering efficiency and the like. Therefore, the diodes D1 to D8 included in the diode bridge circuits 155 and 156 are preferably diodes that can operate following a frequency of at least 20 kHz or more, preferably 200 kHz or more. By doing so, the DC conversion circuit 135 can efficiently convert high-frequency AC power into DC power.

  Moreover, the illuminating device 101 which concerns on Embodiment 2 of this invention can be used also for the support tool for the type of fluorescent lamp which performs a continuity check by providing the input circuit 134. FIG.

  Moreover, the illumination device 101 according to Embodiment 2 of the present invention uses a high-power light-emitting diode with power consumption of 1 W or more for the solid-state light-emitting element 131. Thereby, practical illuminance as a lighting device can be obtained.

  Moreover, the illuminating device 101 which concerns on Embodiment 2 of this invention does not use the constant current control circuit and lighting control circuit which are used for the illuminating device of patent document 2, for example. Thereby, a structure can be simplified and cost reduction can be realized.

  Moreover, the illuminating device 101 which concerns on Embodiment 2 of this invention can perform conversion with little loss by converting alternating current power into direct current power using a full wave rectifier circuit.

  In addition, the lighting device 101 according to the second embodiment of the present invention includes the diode bridge circuits 155 and 156, so that any two of the terminal pin 104a, the terminal pin 104b, the terminal pin 104c, and the terminal pin 104d are AC. When power is supplied, the influence of AC power supplied to two terminal pins to which AC power is not supplied does not appear. In other words, the lighting device 101 can operate normally when the lighting device 101 is connected to the support 141 in any direction. Furthermore, the lighting device 101 can operate normally when AC power is supplied to the terminal pins 104a and 104b and when AC power is supplied to the terminal pins 104c and 104d. .

  In addition, the light emitting diode used as the solid state light emitting device 131 has a very long time of 40,000 hours or more until the emission intensity is reduced to 70% or less of the initial value. The lighting apparatus 101 according to Embodiment 2 of the present invention can achieve a longer life than the life of the fluorescent lamp 181 (6000 hours) by using the solid light emitting element 131 as a light source. The illuminating device 101 can achieve a longer life than the fluorescent lamp 181 (life time of 6000 hours) by using the solid light emitting element 131 as a light source. Therefore, by using the lighting device 101 according to the present invention, the frequency of replacing the lighting device can be reduced. In particular, in an industrial use facility such as a factory, the ceiling to which the support tool 141 is attached is generally very high. That is, the cost for replacing the lighting device and the work risk are high. That is, in an industrial use facility such as a factory, the use of the lighting device 101 according to the present invention can reduce the cost for replacing the lighting device and the risk associated with the work.

  In addition, since the solid light-emitting element 131 does not use mercury, the lighting device 101 with less environmental load can be provided as compared with the fluorescent lamp 181 containing mercury. This is because mercury has a serious adverse effect on the fetal and adult nervous system.

  Moreover, since the dimension of the illuminating device 101 which concerns on Embodiment 2 of this invention is the same dimension as a general straight tube | pipe fluorescent lamp, it can be attached to the support tool for a general fluorescent lamp. Therefore, the illuminating device 101 according to Embodiment 2 of the present invention can improve practicality because it does not require a special support.

  Hereinafter, the result of comparing the performance of the illumination device 101 according to the second embodiment of the present invention and the performance of the fluorescent lamp will be shown.

  FIG. 23 is a diagram schematically illustrating a measurement state of the performance of the fluorescent lamp. FIG. 24 is a diagram schematically illustrating a measurement state of the performance of the illumination device 101 according to the second embodiment of the present invention.

  As shown in FIG. 23, the fluorescent lamp 181 was attached to the support 141, and the illuminance at points P1 to P4 immediately below the fluorescent lamp 181 was measured. Similarly, the illuminating device 101 was attached to the support 141 as shown in FIG. 24, and the illuminance at points P1 to P4 immediately below the illuminating device 101 was measured. Here, the distance from the fluorescent lamp 181 and the illumination device 101 to the point P1 is 50 cm, the distance from the fluorescent lamp 181 and the illumination device 101 to the point P2 is 100 cm, and from the fluorescent lamp 181 and the illumination device 101 to the point P3. The distance from the fluorescent lamp 181 and the illumination device 101 to the point P4 is 200 cm. Moreover, the support 141 to which the fluorescent lamp 181 and the lighting device 101 are attached has the same performance, and the power consumption of the fluorescent lamp 181 and the lighting device 101 is the same.

  Table 1 is a table showing the results of measuring the illuminance of light emitted from the illumination device 101 and the fluorescent lamp 181 at the points P1 to P4 in the state shown in FIGS. Each value in Table 1 is normalized by assuming that the illuminance of light emitted from the fluorescent lamp 181 at the point P4 is 1.0.

  As shown in Table 1, the illumination device 101 according to Embodiment 2 of the present invention can obtain an illuminance 1.6 times that of the fluorescent lamp 181 at a point P4 that is 200 cm away. Moreover, it turns out that the illuminance of about 1.7 to 2.3 times that of the fluorescent lamp 181 can be obtained at the points P1 to P3. Thus, the illumination device 101 according to Embodiment 2 of the present invention can obtain sufficient illuminance as an alternative light source for the fluorescent lamp 181.

(Embodiment 3)
The lighting device according to Embodiment 3 of the present invention forms a hollow structure in the casing, thereby efficiently utilizing the convection of the surrounding air and efficiently releasing heat generated in the lighting device into the air. be able to. Thereby, the illuminating device which concerns on this invention can improve the thermal radiation effect.

  As described above, in the illumination device 101 according to Embodiment 2 of the present invention, a high power light emitting diode is used as the solid state light emitting element 131 in order to obtain sufficient illuminance. In the light emitting diode, most of the input energy (about 80%) becomes heat as a loss. A high power light emitting diode consumes a large amount of power, and accordingly, a large amount of energy is released as heat. If this heat is accumulated in the vicinity of the light emitting diode, the luminous intensity of the light emitting diode is reduced and the life characteristics are deteriorated. In the worst case, the light emitting diode does not light up. Therefore, it is important to handle this heat appropriately.

First, the structure of the illumination device according to Embodiment 3 of the present invention will be described.
FIG. 25 is a perspective view showing an appearance of lighting apparatus 201 according to Embodiment 3 of the present invention. FIG. 26 is a plan view from the side surface (direction D shown in FIG. 25) of lighting apparatus 201 according to Embodiment 3 of the present invention. FIG. 27 is a plan view from the top surface (E direction shown in FIG. 25) of lighting apparatus 201 according to Embodiment 3 of the present invention. FIG. 28 is a cross-sectional view showing the structure of the illumination device 201 on the F1-F2 plane shown in FIG. FIG. 29 is a diagram illustrating a state in which the illumination device 201 is attached to the support 141 for a straight tube fluorescent lamp. FIG. 30 is a cross-sectional view showing the structure of the illumination device 201 and the support 141 on the G1-G2 plane shown in FIG.

Elements similar to those in FIGS. 15 to 19 are denoted by the same reference numerals, and description thereof is omitted.
The illumination device 201 according to Embodiment 3 is different from the illumination device 101 according to Embodiment 2 described above only in that the housing unit 102 is changed to the housing unit 202.

  The cross section on the upper side (upper side in FIG. 28) of the housing part 202 is substantially semicircular. A plurality of inflow ports 203, outflow ports 211, and hollow portions 231 are formed in the housing unit 202.

The casing 202 is made of a metal having a high thermal conductivity (preferably, a metal having a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more). For example, the casing 102 is made of aluminum. The reason why aluminum is used for the housing 102 is that it is inexpensive, easy to mold, has good recyclability, has a thermal conductivity of 200 W · m ⁻¹ · K ⁻¹ or more, and heat dissipation characteristics. Is high. For example, the housing unit 202 can be created using a drawing method.

  Moreover, it is desirable that the housing 202 is made of aluminum and then anodized. Alumite treatment increases the surface area and enhances the heat dissipation effect.

  As shown in FIG. 29, the lighting device 201 supports the light emission toward the ground surface direction (here, the ground surface direction means the floor surface direction when indoors and the ground direction when outdoors). It is attached to the tool 141.

  The hollow part 231 is a hollow structure formed in a columnar shape in the longitudinal direction of the housing part 202. The columnar cross section of the hollow portion 231 has a substantially semicircular shape. The hollow portion 231 is formed on the opposite side to the light emitting direction of the solid state light emitting element 131 with respect to the position inside the housing portion 202 where the substrate 132 is disposed. That is, the hollow portion 231 is formed on the upper side of the solid light emitting element 131 and the substrate 132 when the light emitting direction of the lighting device 201 (the lower direction in FIG. 30) is the lower side. The lower surface of the hollow portion 231 is planar, and the upper surface of the hollow portion 231 has a substantially semicircular cross-sectional shape. The hollow portion 231 is connected to the outside of the lighting device 201 via the inflow port 203 and the outflow port 211.

  The outlet 211 is a through-hole that extends from the upper surface of the hollow portion 231 to the outside of the upper surface of the housing unit 202. The outlet 211 is a hole serving as an outlet for fluid (air) from the inside of the hollow portion 231. The outlet 211 is formed along the longitudinal direction of the casing 202. The outlet 211 is formed at a position on the opposite side of the light emitting direction of the solid state light emitting element 131 of the housing unit 102. The lighting device 201 is attached to the support 141 such that the outlet 211 faces the support 141. That is, in the state where the lighting device 201 is attached to the support 141, the outlet 211 is substantially in the upward direction (preferably within the range of 0 to 30 degrees with respect to the upward direction. If it is, it means the ceiling direction, and if it is outdoors, it means the sky direction.)

  The inflow port 203 is a through hole that extends from the hollow portion 231 to the outside of both side surfaces of the housing portion 202. The inflow port 203 is a hole that serves as an inlet for fluid (air) into the hollow portion 231. The plurality of inflow ports 203 are formed on both side surfaces with respect to the light emitting direction of the solid state light emitting device 131 of the housing unit 202. The plurality of inflow ports 203 formed on each side surface of the casing unit 202 are arranged in series in the longitudinal direction of the casing unit 202 at equal intervals. Further, the position of the inflow port 203 on the side surface of the housing portion 202 is formed below the hollow portion 231 (light emission direction of the solid state light emitting element 131). That is, the direction from the surface of the housing portion 202 of the inflow port 203 to the hollow portion 231 is an obliquely upward direction (an obliquely upward direction in FIG. 30). For example, the angle between the direction from the hollow portion 231 side of the inflow port 203 to the surface side of the housing portion 202 and the direction of the outflow port 211 from the surface side of the housing portion 202 to the hollow portion 231 side is 45 degrees. .

  In addition, the cross-sectional shape of the hollow part 231 is not limited to a substantially semicircular shape, The partial shape should just be a streamline type. Preferably, the shape of the surface of the hollow portion 231 opposite to the light emitting direction of the solid light emitting element 131 (upward direction in FIG. 28) may be a streamline type. The streamlined type here refers to a shape in which air can move smoothly on its surface. Since the shape of the surface of the hollow portion 231 opposite to the light emitting direction of the solid light emitting element 131 is streamlined, air flows smoothly in the hollow portion 231, so heat can be efficiently dissipated from the housing portion 202 into the air. It can be carried out.

  Moreover, the shape of the lower surface of the hollow part 231 does not need to be planar. In addition, the distance from the solid light emitting element 131 to the hollow part 231 can be made uniform by making the shape of the lower surface of the hollow part 231 flat. Moreover, the hollow part 231 can be formed easily.

  Further, one hollow portion 231 may be formed in the housing portion 202, or a plurality of hollow portions 231 arranged in a row in the longitudinal direction of the housing portion 202 may be formed.

  Further, the outer shape of the housing unit 202 is not limited to the cross-sectional shape described above. For example, the casing 202 and the protective translucent plate 133 each have a substantially half-pipe shape, and the cross section becomes a cylindrical shape by combining the casing 202 and the protective translucent plate 133 integrally. May be. Moreover, although the upper surface shape of the housing | casing part 202 is the same as that of the upper surface of the hollow part 231, a different shape may be sufficient.

  Note that the upper surface shape of the housing 202 is preferably a streamlined shape. Thereby, since air flows smoothly on the upper surface of the housing | casing part 202, the thermal radiation from the housing | casing part 202 in the air can be performed efficiently.

  Moreover, the shape and the number of the inflow port 203 and the outflow port 211 are examples, and are not limited thereto. The shape and number of the inflow port 203 and the outflow port 211 may be arbitrarily determined in consideration of processing costs and the like.

  For example, in the outlet 211, one gap is formed along the longitudinal direction of the casing 202, but a plurality of gaps may be arranged in a row in the longitudinal direction of the casing 202. Further, the shape of the outlet 211 is not limited to a rectangle, and may be any shape such as a circle and an ellipse.

  Further, the number of inflow ports 203 may be an arbitrary number. For example, inflow ports 203 having the same shape as the outflow port 211 may be formed on both side surfaces of the housing unit 202. The shape of the inflow port 203 is not limited to an ellipse, and may be an arbitrary shape such as a rectangle.

  Further, the angle between the direction from the hollow portion 231 side of the inflow port 203 to the surface side of the housing portion 202 and the direction from the surface side of the housing portion 202 to the hollow portion 231 side of the outflow port 211 is limited to 45 degrees. Is not to be done. The angle between the direction from the hollow portion 231 side of the inflow port 203 to the surface side of the housing portion 202 and the direction of the outflow port 211 from the surface side of the housing portion 202 to the hollow portion 231 side is 0 degree to 90 degrees. The range may be arbitrarily set in accordance with the shape of the lighting device 201 or the like. Thereby, the warmed air around the lighting device can efficiently flow into the hollow portion 231 from the inflow port 203. Further, the air that has flowed into the hollow portion 231 can be efficiently discharged to the outside.

Next, the heat dissipation mechanism of the illumination device 201 will be described.
FIG. 31 is a diagram illustrating an air flow in a state where the lighting device 201 is energized. FIG. 31 is a cross-sectional view showing the structure of the illumination device 201 and the support 141 on the G1-G2 plane shown in FIG. 29, as in FIG.

  The heat generated in the solid state light emitting device 131 is diffused throughout the housing unit 202 through the substrate 132. The heat diffused in the casing 202 is released into the air using convection effectively.

  Specifically, first, the air around the casing unit 202 is heated by the heat diffused in the casing unit 202 to become an updraft. A part of the air that has become the updraft flows on the outer surface 241 of the casing 202. This air rises while receiving heat from the outer surface 241. That is, heat is released from the outer surface 241 to the air.

  Further, another part of the air that has become the updraft flows into the hollow portion 231 from the inflow port 203. This inflowing air flows out of the hollow portion 231 again from the outlet 211 while receiving the heat of the inner surface 242 of the casing portion 202. This air rises while receiving the heat of the inner surface 242. That is, heat is released from the inner surface 242 to the air. At this time, since a part of the shape of the hollow portion 231 is streamlined, air flows more smoothly. Therefore, the efficiency related to heat release is further increased.

  Thus, the illuminating device 201 according to Embodiment 3 of the present invention can efficiently use the effect of ascending airflow by heating the air, that is, convection. Further, the lighting device 201 can radiate heat not only from the outer surface 241 but also from the inner surface 242. That is, since the lighting device 201 can dissipate heat over a wide area, the heat generated by the solid light emitting element 131 and diffused throughout the housing 202 can be effectively released into the air.

  Here, it is desirable that the inflow port 203 and the solid-state light emitting element 131 are arranged at close positions within a possible range (preferably, a linear distance of 20 mm or less). For example, the inflow port 203 is formed so that the distance between the inflow port 203 and the solid light emitting element 131 is closer than the distance between the outflow port 211 and the solid light emitting element 131. This is because although the heat generated in the solid light emitting element 131 is diffused throughout the casing 202, there is a slight temperature gradient, and therefore the vicinity of the solid light emitting element 131 is at a high temperature. By disposing the inflow port 203 and the solid-state light emitting element 131 close to each other, it becomes possible to promote the release of heat to the air from the portion of the housing unit 202 that is at a high temperature.

  Even when the lighting device 201 is attached to the support 141 so that light is emitted in a direction other than the ground surface, ascending airflow due to heating of air is naturally generated, and heat dissipation corresponding to the attachment state is performed. Needless to say, is done.

  Here, there is a technique described in Japanese Patent Laid-Open No. 2001-305970 as a technique for improving the conventional heat dissipation effect. Japanese Patent Application Laid-Open No. 2001-305970 discloses an advertising device using a light emitting diode having a convection hole to generate an air flow (convection). This is to create convection by providing holes in the upper and lower parts of the advertising device, thereby removing heat generated by the light emitting diode.

  However, in the advertising device, heat is released to the air by directly contacting the convection air with the light emitting diode. However, in the disclosed method, whether or not convection actually occurs. The question remains. Even if convection occurs, the surface of the light emitting diode does not have a sufficient area, so there is no guarantee that heat is efficiently released into the air. Furthermore, the substrate to which the light emitting diode is attached is also made of plastic or glass. These materials have low thermal conductivity and cannot diffuse the heat generated by the light emitting diode. That is, it is considered that heat dissipation through the substrate cannot be expected.

  Hereinafter, the result of comparing the heat dissipation performance of the lighting device 201 according to Embodiment 3 of the present invention and the heat dissipation performance of the conventional lighting device will be shown. As an example, the heat radiation performance of the lighting device 101 according to the second embodiment described above, the lighting device 501 in which the heat radiation fins are attached to the lighting device 101, and the lighting device 201 according to the third embodiment are compared.

  FIG. 32 is a plan view from the side of the illuminating device 501 in which the radiating fins are attached to the illuminating device 101. FIG. 33 is a cross-sectional view showing the structure of lighting device 501 on the H1-H2 plane shown in FIG.

  As illustrated in FIGS. 32 and 33, the lighting device 501 includes heat dissipating fins 502 formed above the casing unit 102 (above when the light emission direction is a downward direction). The radiation fin 502 has a cross-sectional shape having a plurality of irregularities. The heat radiating fin 502 has a plurality of irregularities, thereby increasing the surface area. Thereby, the heat dissipation effect to the air can be improved.

  Table 2 is a table showing a comparison result of the heat radiation performance of the lighting device 101 according to the second embodiment, the lighting device 501 including the heat radiation fins 502, and the lighting device 201 according to the third embodiment. Note that the amount of temperature decrease shown in Table 2 is a value calculated by computer simulation software. Further, the amount of heat given to the lighting device 101, the lighting device 501, and the lighting device 201 is constant. Moreover, the temperature fall amount shown in Table 2 uses the temperature of the highest temperature point in the illuminating device 101 as the reference temperature. And the temperature fall amount shown in Table 2 has shown how many times the temperature of the highest temperature point in the illuminating device 501 and the illuminating device 201 became low with respect to the reference temperature.

  As shown in Table 2, the lighting device 201 can achieve a large temperature drop with respect to the lighting device 101 and the lighting device 501. The inventors have also confirmed that a similar temperature drop appears in experiments using actual devices.

  Therefore, it became clear that the illuminating device 201 which concerns on Embodiment 3 of this invention has a big heat dissipation effect. That is, it can be said that the illumination device 201 according to Embodiment 3 of the present invention can fully exhibit the characteristics of the solid-state light emitting element 131.

  In addition, the illuminating device 201 of this invention is not limited to the said Example, It can deform | transform and implement freely in the range which does not deviate from the meaning of this invention.

  For example, in the above description, the lighting device 101 and the lighting device 201 are of a type that can be applied to a general fluorescent lamp support, but a type that uses a dedicated support or a direct commercial power source that does not use a support. You may implement | achieve as a type which receives supply and operate | moves.

  In the above description, the directivity of light emitted from the solid state light emitting element 131 is weakened by forming fine uneven unevenness on the protective translucent plate 133. Instead of forming the unevenness, any of the following three methods may be used.

  As a first method, a diffusion sheet that diffuses light may be attached to the protective translucent plate 133. That is, the illuminating device 101 and the illuminating device 201 may include a diffusion sheet that is formed on the front surface or the back surface of the protective translucent plate 133 and diffuses the light emitted by the solid light emitting element 131. The diffusion sheet diffuses the light emitted from the solid state light emitting device 131. Therefore, the illuminating devices 101 and 201 according to the present invention can weaken the directivity of the light emitted from the solid light emitting element 131 and illuminate a wide range.

  As a second method, an additive for diffusing the light emitted from the solid light emitting element 131 may be added to the protective translucent plate 133. The light emitted from the solid state light emitting device is diffused by the additive. Therefore, the illuminating devices 101 and 201 according to the present invention can weaken the directivity of the light emitted from the solid light emitting element 131 and illuminate a wide range.

As a third method, unevenness may be formed on the protective translucent plate 133 as follows.
FIG. 34 is a diagram illustrating an external appearance and a cross-sectional configuration of a lighting device 301 that is a modification of the lighting device 201 according to the third embodiment. FIG. 35 is a cross-sectional view showing the structure of the illumination device 301 on the I1-I2 plane shown in FIG. In addition, the same code | symbol is attached | subjected to the element similar to FIGS.

  The illumination device 301 differs from the illumination device 201 in the configuration of the protective translucent plate 133. The lighting device 301 includes a protective translucent plate 333. The other components are the same as those of the lighting device 201, and detailed description thereof is omitted.

  As shown in FIGS. 34 and 35, the protective translucent plate 333 is provided with a concavo-convex shape corresponding to the solid light emitting element 131 on the back surface (the upper surface in FIG. 34). Specifically, a convex shape is formed on the light emission optical axis of each solid state light emitting element 131 of the housing unit 202. On the optical axis of the solid light emitting element 131, the amount of light reaching the protective translucent plate 333 from the solid light emitting element 131 increases. Therefore, light is diffused from the convex shape, and the amount of light is reduced.

  On the other hand, the amount of light reaching the protective translucent plate 333 from the solid light-emitting element 131 is reduced in the portion off the optical axis of the solid light-emitting element 131. Accordingly, the amount of light diffusion is minimized by the concave shape.

  As described above, the uniformity of the light intensity distribution in the longitudinal direction (lateral direction in FIG. 34) and the direction perpendicular to the longitudinal direction (lateral direction in FIG. 35) in the lighting device 301 can be improved. Thereby, the illuminating device 301 which concerns on this invention can weaken the directivity of the light light-emitted from the solid light emitting element, and can illuminate a wide range. The uneven shape may be formed on the surface of the protective translucent plate 333 (the lower surface in FIG. 34).

  Further, the directivity of light emitted from the solid state light emitting device 131 is weakened by using two or more of the first to third methods and the method of forming fine uneven unevenness on the protective translucent plate 133. May be.

  Further, electroluminescence may be used as the solid light emitting element 131. Electroluminescence is a direct current drive element, and the present invention can be applied thereto. Electroluminescence is mercury-free, like light-emitting diodes, and is one of the light sources attracting attention.

  Further, by forming the casing 202 and the protective translucent plate 133 in an annular shape, the lighting device 201 can be used as an alternative light source for the annular fluorescent lamp.

  The present invention can be applied to an illuminating device, and particularly applicable to an illuminating device using a solid light emitting element such as a light emitting diode as a light source.

It is a perspective view which shows the external appearance of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a top view from the side surface of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a top view from the upper surface of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is sectional drawing of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the state which attached the illuminating device 1 which concerns on Embodiment 1 of this invention to the support tool 41 for straight tube | pipe fluorescent lamps. It is sectional drawing which shows the state which attached the illuminating device 1 which concerns on Embodiment 1 of this invention to the support tool 41 for straight tube | pipe fluorescent lamps. It is a figure which shows the flow of the air in the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the circuit structure of the illuminating device 1 which concerns on Embodiment 1 of this invention. It is a figure which shows the change of the forward voltage Vf with respect to the operating point P of the solid light emitting element 31 which concerns on Embodiment 1 of this invention. It is a figure which shows the change of the luminous efficiency (eta) with respect to the operating point P of the solid light emitting element 31 which concerns on Embodiment 1 of this invention. It is a flowchart in order to demonstrate the process which determines the number of the solid light emitting elements 31 which comprise each solid light emitting element row | line | column 73 connected in parallel of the illuminating device 1 in Embodiment 1 of this invention. It is a figure which shows the performance requested | required of the illuminating device 1 in Embodiment 1 of this invention. Explaining that the characteristic information of the solid-state light-emitting element 31 used in the configuration of the lighting device 1 in Embodiment 1 of the present invention and the number of the solid-state light-emitting elements 31 used in the lighting device 1 are determined using the characteristic information. It is a figure to do. It is a flowchart for demonstrating the process which determines the number of the solid light emitting elements 31 which comprise each solid light emitting element row | line | column 73 connected in parallel of the illuminating device 1 in the modification of Embodiment 1 of this invention. It is a figure which shows the performance requested | required of the illuminating device 1 in the modification of Embodiment 1 of this invention. The characteristic information of the solid state light emitting elements 31 used in the configuration of the lighting device 1 in the modification of the first embodiment of the present invention and the number of the solid state light emitting elements 31 used in the lighting device 1 are determined using the characteristic information. It is a figure explaining this. It is a perspective view which shows the external appearance of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is a top view from the side surface of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is a top view from the upper surface of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is sectional drawing of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is a figure which shows the state which attached the illuminating device 101 which concerns on Embodiment 2 of this invention to the support 141 for straight tube | pipe fluorescent lamps. It is a figure which shows the circuit structure of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is a figure which shows an example of the circuit structure of the state which attached the illuminating device 101 which concerns on Embodiment 2 of this invention to the support tool. It is a figure which shows an example of the circuit structure of the state which attached the illuminating device 101 which concerns on Embodiment 2 of this invention to the support tool. It is a figure which shows typically the measurement condition of the performance of a fluorescent lamp. It is a figure which shows typically the measurement condition of the performance of the illuminating device 101 which concerns on Embodiment 2 of this invention. It is a perspective view which shows the external appearance of the illuminating device 201 which concerns on Embodiment 3 of this invention. It is a top view from the side of the illuminating device 201 which concerns on Embodiment 3 of this invention. It is a top view from the upper surface of the illuminating device 201 which concerns on Embodiment 3 of this invention. It is sectional drawing of the illuminating device 201 which concerns on Embodiment 3 of this invention. It is a figure which shows the state which attached the illuminating device 201 which concerns on Embodiment 3 of this invention to the support 141 for straight tube | pipe fluorescent lamps. It is sectional drawing of the state which attached the illuminating device 201 which concerns on Embodiment 3 of this invention to the support 141 for straight tube | pipe fluorescent lamps. It is a figure which shows the flow of the air in the illuminating device 201 which concerns on Embodiment 3 of this invention. It is a top view from the side surface of the illuminating device 501 provided with a radiation fin. It is sectional drawing of the illuminating device 501 provided with a radiation fin. It is a figure which shows the external appearance and sectional structure of the illuminating device 301 which is a modification of the illuminating device 201 which concerns on Embodiment 3 of this invention. It is sectional drawing of the illuminating device 301 which is a modification of the illuminating device 201 which concerns on Embodiment 3 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Illuminating device 2 Housing | casing part 3 Terminal part 4 Terminal pin 5 Inflow port 21 Outlet 31 Solid light emitting element 32 Substrate 33 Protective translucent board 34, 35 Parts 41 Support tool 51 Hollow part 61 External surface 62 Internal surface 71 AC power supply 72 Conversion Circuit 73 Solid State Light Emitting Element Array 101, 201, 301, 501 Illumination Device 102, 202 Case Part 103 Terminal Part 104, 104a, 104b, 104c, 104d Terminal Pin 131 Solid State Light Emitting Element 132 Substrate 133, 333 Protective Translucent Plate 134 Input circuit 135 DC conversion circuit 136 Adjustment circuit 137 Protection circuit 141 Support 157, 158 Terminal 155, 156 Diode bridge circuit 161 Plug 162 Switch 163 Stabilizer 164 Glow lamp 181 Fluorescent lamp 203 Inlet 211 Outlet 231 Hollow part 241 Outside Surface 242 Internal surface 502 Radiation fin D1, D2, D3, D4, D5, D6, D7, D8 Diode

Claims (6)

An illumination device that illuminates by emitting light from a plurality of solid state light emitting elements,
Holding means made of metal and holding the plurality of solid state light emitting elements in one or more rows;
It is made of metal, and has a horizontally long three-dimensional housing with the holding means inside,
The housing portion is
A first space located at a lower part of the casing and having a hollow structure in which the holding means is disposed;
A columnar shape that is positioned at the upper part of the casing portion that is opposite to the light emitting direction of the plurality of solid state light emitting elements with respect to the position at which the holding means is disposed, has a hollow structure, and is arranged in parallel in the longitudinal direction. A plurality of second space parts,
Each of the second space portions communicates with the outside of the housing portion and serves as an air inlet, and is formed along the longitudinal direction from the side surface of the housing portion.
An opening formed along the longitudinal direction on the upper surface of the housing portion, communicating with the outside of the housing portion and serving as an air outlet;
The illuminating device characterized in that the holding means is in close contact with the casing portion directly or through a material having thermal conductivity. 2. The lighting device according to claim 1, wherein the shape of the surface in the light emitting direction of the plurality of solid state light emitting elements and the surface on the opposite side of the second space portion are streamlined. The lighting device according to claim 1, wherein a distance between the hole and the solid state light emitting element is shorter than a distance between the opening and the solid state light emitting element. The angle between the direction of the hole from the second space part side to the surface side of the housing part and the direction of the opening from the surface side of the housing part to the second space part side is from 0 degree. It is a range of 90 degree | times. The illuminating device of any one of Claims 1-3 characterized by the above-mentioned. The lighting device according to any one of claims 1 to 4, wherein a shape of an upper outer surface of the housing portion from the opening to the hole is a streamlined shape. In the state where the lighting device is energized to the plurality of solid state light emitting elements,
Conducting a part of the heat generated in the plurality of solid state light emitting devices to the casing through a holding means,
The heat conducted to the housing part is discharged by the airflow passing through the second space part through the opening and the hole and the rising airflow generated along the side surface of the housing part. Item 6. The lighting device according to any one of Items 1 to 5.

Images