JP5420118B1 - Light bulb shaped lamp and lighting device - Google Patents

Abstract

  A light bulb shaped lamp (1) having a globe (10) and a base (30), a metal column (40) provided to extend inward of the globe (10), and a globe (10 ) And the LED module (20) fixed to the support column (40). The LED module (20) is mounted on the translucent base (21) and the base (21). The LED chip (22) and the support (40) have a fixing surface (42a) for fixing the base (21) of the LED module (20), and the LED module (20) and the support ( 40) is arranged so that the fixed surface (42a) and the LED chip (22) do not overlap when viewed in plan.

Description

  The present invention relates to a light bulb shaped lamp and a lighting device, for example, a light bulb shaped LED lamp using a light emitting diode (LED: Light Emitting Diode) and a lighting device using the same.

  Semiconductor light emitting devices such as LEDs are expected to be a new light source in various lamps such as fluorescent lamps and incandescent lamps, since they are small, highly efficient, and have a long lifetime. R & D is underway.

  As an LED lamp, replace it with a bulb-type fluorescent lamp with a light bulb in a glass bulb, a bulb-type LED lamp (bulb-shaped LED lamp) that replaces an incandescent bulb with a filament coil, or a straight-tube fluorescent lamp There is a straight tube type LED lamp (straight tube type LED lamp).

  For example, Patent Document 1 discloses a conventional bulb-type LED lamp. FIG. 13 is a cross-sectional view of a conventional bulb-type LED lamp disclosed in Patent Document 1. As shown in FIG.

  As shown in FIG. 13, the conventional bulb-type LED lamp 100 includes a translucent cover 110 that is a hemispherical globe, a base 130, and an outer member 190 that is a metal casing.

  The outer member 190 includes a peripheral portion 191 exposed to the outside, a disk-shaped light source mounting portion 192 formed integrally with the peripheral portion 191, and a concave portion 193 formed inside the peripheral portion 191. An LED module 120 composed of a plurality of LEDs mounted on a base is attached to the upper surface of the light source attachment portion 192. An insulating member 160 formed along the shape of the inner surface is provided on the inner surface of the recess 193, and a lighting circuit 180 for lighting the LED is accommodated inside the insulating member 160.

  According to the conventional bulb-type LED lamp 100 configured as described above, the outer member 190 (metal casing) in which the light source mounting portion 192 and the peripheral portion 191 are integrally formed is used. 190 functions as a heat sink for releasing heat generated in the LED to the outside. Thereby, the heat generated in the LED can be efficiently conducted from the light source mounting portion 192 toward the peripheral portion 191. As a result, since the temperature rise of the LED is suppressed, it is possible to suppress a decrease in the light output of the LED.

JP 2006-313717 A

  However, in the conventional light bulb-shaped LED lamp 100 shown in FIG. 13, the LED module 120 is provided on the disc-shaped light source mounting portion 192, so that the light toward the base 130 is blocked by the outer member 190. For this reason, the conventional bulb-type LED lamp 100 differs from the incandescent bulb in the way the light spreads. That is, with the structure of the conventional light bulb shaped LED lamp 100, it is difficult to obtain the same light distribution characteristic as that of the incandescent light bulb, and it is difficult to realize a wide light distribution angle.

  Therefore, as shown in FIG. 14, in order to make the light of the LED module 220 reach the base 230 side as much as possible, the globe 210 having the same shape as the globe (bulb) of the incandescent light bulb is used. A light-bulb-shaped LED lamp 200 having a structure in which the LED module 220 is held on the support column 240 is considered. In this case, as compared with the conventional light bulb shaped LED lamp 100 shown in FIG. 13, the amount of light of the LED module 220 toward the base side can be increased, so that the light distribution angle can be increased.

  Further, in the light bulb shaped LED lamp 200 shown in FIG. 14, a metal column is used as the support column 240 for holding the LED module 220 in order to dissipate heat generated from the LED module 220. For this reason, the light which transmits the translucent board | substrate among the light which LED module 220 emits, and goes to a nozzle | cap | die side will be absorbed by the metal support | pillars 240. Therefore, the light bulb shaped LED lamp 200 shown in FIG. 14 has a problem that the light extraction efficiency in the direction of the base (back surface) of the LED module 220 is low.

  The present invention has been made to solve such a problem, and an object thereof is to provide a light bulb shaped lamp and an illuminating device capable of improving the light extraction efficiency to the base of the LED module. .

  In order to solve the above-mentioned problem, one aspect of a light bulb shaped lamp according to the present invention is a light bulb shaped lamp having a globe and a base, and is made of a metal provided so as to extend inward of the globe. A light-emitting module disposed in the globe and fixed to the column; the light-emitting module includes a translucent base and a light-emitting element mounted on the base; The support column has a fixed surface fixed to the base of the light emitting module, and the light emitting module and the support column are arranged so that the fixed surface and the light emitting element do not overlap when viewed in plan. It is characterized by.

  Furthermore, in an aspect of the light bulb shaped lamp according to the present invention, the light emitting module further includes a sealing member for sealing the light emitting element, and the sealing member converts a wavelength of light emitted by the light emitting element. The sealing member is formed so as not to overlap the fixed surface when seen in a plan view.

  Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, the light emitting module is elongated when viewed in plan, and the support column is between the main shaft portion, the main shaft portion, and the light emitting module. A fixing portion having the fixing surface, and the length of the fixing surface in the longitudinal direction of the light emitting module is longer than the length of the main shaft portion in the longitudinal direction of the light emitting module. The length of the light emitting module in the short direction may be configured to be shorter than the length of the main shaft portion in the short direction of the light emitting module.

  Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, a side surface of the fixed portion is connected to the light emitting module, connected to a straight surface parallel to the axis of the support column, and a lower portion of the straight surface, A curved surface that curves away from the axis of the column toward the side may be included.

  Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, the side surface of the fixed portion may be configured to include an inclined surface that inclines away from the axis of the support column toward the base side.

Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, the base may be a ceramic substrate made of Al ₂ O ₃ , AlN, or MgO.

  Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, the support column may be made of aluminum.

  Furthermore, in one aspect of the light bulb shaped lamp according to the present invention, a configuration is provided that includes a lead wire for supplying power to the light emitting element, and an insulating case that houses a lighting circuit for lighting the light emitting element. can do.

  One embodiment of the lighting device according to the present invention is a lighting device including any one of the above-described light bulb shaped lamps.

  ADVANTAGE OF THE INVENTION According to this invention, the lightbulb-shaped lamp and illuminating device which can improve the extraction efficiency of the light to the nozzle | cap | die side of a light emitting module are realizable.

FIG. 1 is a side view of a light bulb shaped lamp according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the light bulb shaped lamp according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the light bulb shaped lamp according to the embodiment of the present invention. Fig.4 (a) is a top view of the LED module in the lightbulb-shaped lamp which concerns on embodiment of this invention, FIG.4 (b) cut | disconnected along the AA 'line of Fig.4 (a). It is sectional drawing of the LED module. FIG. 5 is an enlarged cross-sectional view around the LED chip in the LED module of the light bulb shaped lamp according to the embodiment of the present invention. FIG. 6 is a perspective view showing a configuration of a column and a support base in the light bulb shaped lamp according to the embodiment of the present invention. FIGS. 7A and 7B show the configuration of the support and the support in the light bulb shaped lamp according to the embodiment of the present invention. FIG. 7A is a top view, FIG. 7B is a front view, and FIG. FIG. 8 is a diagram for explaining a connection relationship between the LED module and the support in the light bulb shaped lamp according to the embodiment of the present invention. FIG. 9 is a diagram showing a state when the light bulb shaped lamp according to the embodiment of the present invention is turned on. FIG. 10 is a diagram for explaining the relationship between the length of the fixed portion and the luminous flux in the light bulb shaped lamp according to the embodiment of the present invention. FIG. 11A is a diagram illustrating a configuration of an LED module and a column in a light bulb shaped lamp according to a first modification of the present invention. FIG. 11B is a diagram showing a configuration of the LED module and the support in the light bulb shaped lamp according to the second modification of the present invention. FIG. 11C is a diagram showing a configuration of the LED module and the support in the light bulb shaped lamp according to the third modification of the present invention. FIG. 11D is a diagram showing a configuration of an LED module and a column in a light bulb shaped lamp according to a fourth modification of the present invention. FIG. 12 is a schematic cross-sectional view of a lighting device according to the present invention. FIG. 13 is a cross-sectional view of a conventional bulb-type LED lamp disclosed in Patent Document 1. As shown in FIG. FIG. 14 is a cross-sectional view showing a configuration of an example of a bulb-type LED lamp.

  Hereinafter, a light bulb shaped lamp and an illumination device according to an embodiment of the present invention will be described with reference to the drawings. Note that each of the embodiments described below shows a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, components, arrangement positions and connection forms of the components shown in the following embodiments are merely examples, and are not intended to limit the present invention. Therefore, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept of the present invention are not necessarily required to achieve the object of the present invention. It will be described as constituting a preferred form. Each figure is a schematic diagram and is not necessarily illustrated exactly.

(Overall configuration of bulb-type lamp)
First, the whole structure of the light bulb shaped lamp 1 according to the present embodiment will be described with reference to FIGS.

  FIG. 1 is a side view of a light bulb shaped lamp according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the light bulb shaped lamp according to the embodiment of the present invention. FIG. 3 is a cross-sectional view of the light bulb shaped lamp according to the embodiment of the present invention.

  As shown in FIGS. 1 to 3, a light bulb shaped lamp 1 according to an embodiment of the present invention is a light bulb shaped LED lamp that is a substitute for a light bulb shaped fluorescent light or an incandescent light bulb, and a translucent globe 10. And an LED module 20 that is a light source, a base 30 that receives power, and a metal support 40. Furthermore, the light bulb shaped lamp 1 according to the present embodiment includes a support base 50, a resin case 60, a lead wire 70, and a lighting circuit 80. In the light bulb shaped lamp 1 in the present embodiment, an envelope is constituted by the globe 10, the resin case 60 (first case portion 61), and the base 30.

  Hereinafter, each component of the light bulb shaped lamp 1 according to the embodiment of the present invention will be described in detail with reference to FIGS.

(Glove)
As shown in FIGS. 1 to 3, the globe 10 houses the LED module 20 and transmits light from the LED module 20 to the outside of the lamp. In the present embodiment, the globe 10 is a glass bulb (clear bulb) made of silica glass that is transparent to visible light. Therefore, the LED module 20 housed in the globe 10 can be viewed from the outside of the globe 10.

  In the present embodiment, the shape of the globe 10 is a shape in which one end is closed in a spherical shape and the opening 11 is provided at the other end. In other words, the shape of the globe 10 is such that a part of the hollow sphere narrows while extending away from the center of the sphere, and the opening 11 is formed at a position away from the center of the sphere. ing. As the globe 10 having such a shape, a glass bulb having the same shape as a general incandescent bulb can be used. For example, a glass bulb such as an A shape, a G shape, or an E shape can be used as the globe 10.

  The globe 10 is not necessarily transparent to visible light, and the globe 10 may have a light diffusion function. For example, a milky white light diffusing film may be formed by applying a resin containing a light diffusing material such as silica or calcium carbonate, a white pigment, or the like to the entire inner surface or outer surface of the globe 10. Moreover, the globe 10 does not need to be made of silica glass. For example, a globe 10 made of a resin material such as acrylic may be used.

(LED module)
The LED module 20 is a light emitting module having a light emitting element, and is housed in the globe 10. The LED module 20 is preferably disposed at a spherical center position formed by the globe 10 (for example, inside the large diameter portion where the inner diameter of the globe 10 is large). Thus, by arranging the LED module 20 at the center position of the globe 10, the light distribution characteristic of the light bulb shaped lamp 1 becomes a light distribution characteristic approximate to that of a general incandescent light bulb using a conventional filament coil.

  The LED module 20 is held hollow in the globe 10 by the support column 40, and emits light when electric power is supplied from the lead wire 70.

  Here, each component of the LED module 20 which concerns on embodiment of this invention is demonstrated using FIG. 4A is a plan view of the LED module in the light bulb shaped lamp according to the embodiment of the present invention, and FIG. 4B is cut along the line AA ′ in FIG. It is sectional drawing of the LED module.

  As shown in FIGS. 4A and 4B, the LED module 20 includes a translucent base 21, an LED chip 22, a sealing member 23, and a metal wiring 24. LED module 20 in the present embodiment has a COB (Chip On Board) structure in which a bare chip is directly mounted on base 21. Hereinafter, each component of the LED module 20 will be described in detail.

  First, the base 21 will be described. In the present embodiment, the base 21 is an LED mounting substrate for mounting the LED chip 22, and is composed of a member having a light-transmitting property with respect to visible light.

Note that the base 21 is preferably made of a member having a high transmittance. Thereby, the light of LED chip 22 permeate | transmits the inside of the base 21, and is radiate | emitted also from the surface (back surface) in which LED chip 22 is not mounted. Therefore, even when the LED chip 22 is mounted only on one surface (front surface) of the base 21, light is emitted from the other surface (back surface), and light distribution characteristics similar to an incandescent bulb are obtained. It becomes possible. In the present embodiment, a ceramic substrate made of alumina (Al ₂ O ₃ ) having a transmittance of 90% or more is used as the base 21. As the base 21, a ceramic substrate made of AlN or MgO can be used. Further, as the base 21, a rectangular substrate having a long shape in plan view (when viewed from the top of the globe 10) is used. Thereby, the shape of the planar view of the LED module 20 is also long.

  The base 21 is provided with through holes 21a and 21b. The through hole 21 a is provided to fit the base 21 and the support column 40. In the present embodiment, the through hole 21 a is formed in a rectangular shape in plan view at a position shifted in the longitudinal direction from the center of the base 21. On the other hand, two through holes 21b are provided for electrical connection with the two lead wires 70. In the present embodiment, the through holes 21b are provided at both ends of the base 21 in the longitudinal direction.

  Next, the LED chip 22 will be described. The LED chip 22 is an example of a semiconductor light emitting element, and is a bare chip that emits monochromatic visible light. In the present embodiment, a blue LED chip that emits blue light when energized is used. In the present embodiment, the LED chip 22 is mounted only on one surface (front surface) of the base 21, and four element rows each including a plurality of (for example, twelve) LED chips 22 are arranged in a straight line. Arranged in columns.

  In the present embodiment, a plurality of LED chips 22 are mounted. However, the number of LED chips 22 may be appropriately changed according to the use of the light bulb shaped lamp. For example, in a light bulb replacement application, the number of LED chips 22 mounted on the base 21 may be one. In the present embodiment, the plurality of LED chips 22 are mounted in four rows on the base 21, but may be one row or may be a plurality of rows other than the four rows. However, the present invention is suitable for a high output LED module having a large number of LED chips 22.

  Here, the LED chip 22 used in the present embodiment will be described with reference to FIG. FIG. 5 is an enlarged cross-sectional view around the LED chip in the LED module of the light bulb shaped lamp according to the embodiment of the present invention.

  As shown in FIG. 5, the LED chip 22 includes a sapphire substrate 22a and a plurality of nitride semiconductor layers 22b having different compositions stacked on the sapphire substrate 22a.

  A cathode electrode 22c and an anode electrode 22d are provided at the end of the upper surface of the nitride semiconductor layer 22b. Further, wire bond portions 22e and 22f are provided on the cathode electrode 22c and the anode electrode 22d, respectively.

  In the LED chips 22 adjacent to each other, the cathode electrode 22c of one LED chip 22 and the anode electrode 22d of the other LED chip 22 are electrically connected in series by a gold wire 25 through wire bond portions 22e and 22f. ing. Each LED chip 22 is mounted on the base 21 with a translucent chip bonding material 26 so that the surface on the sapphire substrate 22 a side faces the mounting surface of the base 21. For the chip bonding material 26, a silicone resin containing a filler made of metal oxide can be used. By using a translucent material for the chip bonding material 26, loss of light emitted from the surface of the LED chip 22 on the sapphire substrate 22a side and the side surface of the LED chip 22 can be reduced. Generation of shadows can be prevented.

  Returning to FIG. 4, the sealing member 23 will be described next. The sealing member 23 is linearly formed so as to collectively seal one row of the plurality of LED chips 22. In the present embodiment, since the LED chips 22 are mounted in four rows, four sealing members 23 are formed. The sealing member 23 includes a phosphor that is a light wavelength conversion material, and also functions as a wavelength conversion layer that converts the wavelength of light from the LED chip 22. As the sealing member 23, a phosphor-containing resin in which predetermined phosphor particles (not shown) and a light diffusing material (not shown) are dispersed in a silicone resin can be used.

  As the phosphor particles, when the LED chip 22 is a blue LED chip that emits blue light, for example, YAG-based yellow phosphor particles can be used to obtain white light. Thereby, a part of the blue light emitted from the LED chip 22 is wavelength-converted to yellow light by the yellow phosphor particles contained in the sealing member 23. Then, the blue light that has not been absorbed by the yellow phosphor particles and the yellow light that has been wavelength-converted by the yellow phosphor particles are diffused and mixed in the sealing member 23, so that white light is emitted from the sealing member 23. And emitted. In addition, particles such as silica are used as the light diffusing material. In addition, in this Embodiment, since the base 21 which has translucency is used, the white light radiate | emitted from the sealing member 23 permeate | transmits the inside of the base 21, and also from the back surface of the base 21 Emitted.

  The sealing member 23 configured as described above can be formed, for example, by applying and curing an uncured paste-like sealing member 23 containing a wavelength conversion material with a dispenser.

  The sealing member 23 is not necessarily formed of a silicone resin, and may be formed of an inorganic material such as a low-melting glass or a sol-gel glass in addition to an organic material such as a fluorine-based resin. Further, in order to convert the wavelength of the light traveling toward the back side of the base 21, phosphor particles and glass or the like are used as the second wavelength conversion material between the LED chip 22 and the base 21 or on the back side of the base 21. A sintered body film (phosphor film) made of an inorganic binder (binder) may be further formed. In this way, white light can be emitted from both surfaces of the base 21 by further forming the phosphor film (second wavelength conversion material).

  Next, the metal wiring 24 will be described. The metal wiring 24 is a wiring made of a metal such as Ag patterned on the LED mounting surface (front surface), and supplies power supplied from the lead wire 70 to the LED module 20 to each LED chip 22. Each LED chip 22 is electrically connected to the metal wiring 24 via a gold wire 25.

  The metal wiring 24 formed around the through hole 21b serves as a power feeding unit. The leading ends of the two lead wires 70 are inserted into the through holes 21b, and are electrically and physically connected to the metal wiring 24 by solder.

(Base)
As shown in FIGS. 1-3, the nozzle | cap | die 30 is a power receiving part which receives the electric power for light-emitting LED of the LED module 20 from the exterior, Comprising: For example, it is attached to the socket of a lighting fixture. When the light bulb shaped lamp 1 is turned on, the base 30 receives power from the socket of the lighting fixture. The base 30 in the present embodiment receives AC power through two contact points, and the power received by the base 30 is input to the power input unit of the lighting circuit 80 via a lead wire.

  The base 30 is E-shaped, and a screwing portion for screwing into a socket of the lighting device is formed on the outer peripheral surface thereof. Further, a screwing portion for screwing into the resin case 60 is formed on the inner peripheral surface of the base 30. The base 30 has a metal bottomed cylindrical shape.

  The type of the base 30 is not particularly limited. For example, a screw-type Edison type (E type) base can be used, and examples thereof include E26 type and E17 type.

(Support)
As shown in FIGS. 1 to 3, the support column 40 is a metal stem provided so as to extend from the vicinity of the opening 11 of the globe 10 toward the inside of the globe 10.

  The support column 40 functions as a holding member that holds the LED module 20. One end of the support column 40 is connected to the LED module 20, and the other end of the support column 40 is connected to the support base 50.

  Moreover, the support | pillar 40 is comprised with the metal material and functions also as a heat radiating member for radiating the heat which generate | occur | produces in the LED module 20. FIG. In this embodiment, the support column 40 is made of aluminum having a thermal conductivity of 237 [W / m · K]. Thus, since the support | pillar 40 is comprised with the metal material, the heat | fever of the LED module 20 is efficiently conducted to the support | pillar 40 via the base 21. FIG. Thereby, the heat of the LED module 20 can be released to the base 30 side. As a result, it is possible to suppress a decrease in light emission efficiency and a decrease in lifetime of the LED chip 22 due to a temperature rise. The detailed configuration of the support column 40 will be described later.

(Support stand)
The support base (support plate) 50 is a support member that supports the support column 40 and is connected to the opening end of the opening 11 of the globe 10 as shown in FIG. 3. The support base 50 is configured to close the opening 11 of the globe 10. In the present embodiment, the support base 50 is fixed to the resin case 60.

  The support base 50 is made of a metal material, and in the present embodiment, like the support column 40, it is made of aluminum. Thereby, the heat of the LED module 20 thermally conducted to the support column 40 is efficiently conducted to the support base 50. As a result, it is possible to suppress a decrease in light emission efficiency and a decrease in lifetime of the LED chip 22 due to a temperature rise.

  Moreover, in this Embodiment, the support stand 50 is comprised with the disk shaped member which has a level | step difference part. The opening end of the opening portion 11 of the globe 10 is in contact with the stepped portion, thereby closing the opening portion 11 of the globe 10. Further, in the stepped portion, the support base 50, the resin case 60, and the opening end of the opening 11 of the globe 10 are fixed by an adhesive.

(Resin case)
The resin case 60 is an insulating case (circuit holder) that insulates the support column 40 and the base 30 and houses and holds the lighting circuit 80. As shown in FIGS. 2 and 3, the resin case 60 includes a large-diameter cylindrical first case portion 61 and a small-diameter cylindrical second case portion 62. Since the outer surface of the first case portion 61 is exposed to the outside air, the heat conducted to the resin case 60 is mainly radiated from the first case portion 61. The second case portion 62 is configured such that the outer peripheral surface is in contact with the inner peripheral surface of the base 30. In the present embodiment, the second case portion 62 is screwed into the outer peripheral surface of the second case portion 62. A threaded portion is formed. The resin case 60 can be molded by, for example, polybutylene terephthalate (PBT).

(Lead)
The two lead wires 70 are electric wires for supplying power for lighting the LED module 20 from the lighting circuit 80 to the LED module 20. As shown in FIG. 3, one end of each lead wire 70 is electrically connected to the power supply unit of the LED module 20, and the other end of each lead wire 70 is electrically connected to the power output unit of the lighting circuit 80. It is connected.

(Lighting circuit)
The lighting circuit 80 is a circuit unit for lighting the LED module 20 (LED chip 22), and is housed in a resin case 60 as shown in FIG. Specifically, the lighting circuit 80 includes a plurality of circuit elements and a circuit board on which each circuit element is mounted. In the present embodiment, the lighting circuit 80 converts AC power fed from the base 30 into DC power, and supplies the DC power to the LED module 20 (LED chip 22) via the two lead wires 70. .

  The light bulb shaped lamp 1 does not necessarily need to include the lighting circuit 80. For example, when direct-current power is directly supplied from a lighting fixture or a battery, the light bulb shaped lamp 1 may not include the lighting circuit 80. The lighting circuit 80 is not limited to a smoothing circuit, and a dimming circuit, a booster circuit, and the like can be appropriately selected and combined.

  The light bulb shaped lamp 1 is configured as described above. Next, the detailed structure of the support | pillar 40 and the support stand 50 in the lightbulb-shaped lamp 1 which concerns on this Embodiment is demonstrated using FIG.6 and FIG.7. FIG. 6 is a perspective view showing a configuration of a column and a support base in the light bulb shaped lamp according to the embodiment of the present invention. FIG. 7A is a top view showing the configuration of the support column and the support base, and FIG. 7B is a front view showing the configuration of the support column and the support stand. c) is a side view showing the configuration of the column and the support.

  As shown in FIGS. 6 and 7, the support column 40 includes a main shaft portion (first stem portion) 41 and a fixing portion (second stem portion) 42. In the present embodiment, the main shaft portion 41 and the fixed portion 42 are integrally molded.

  The main shaft portion 41 is a cylindrical member having a constant cross-sectional area. One end portion of the main shaft portion 41 is connected to the fixed portion 42, and the other end portion of the main shaft portion 41 is connected to the support base 50.

  The fixed portion 42 is located between the main shaft portion 41 and the LED module 20 and is connected to the main shaft portion 41 and to the LED module 20.

  The fixing portion 42 has a fixing surface 42 a that is fixed to the base 21 of the LED module 20. The fixed surface 42a is a contact surface between the fixed portion 42 (the support column 40) and the back surface of the base 21 (the LED module 20).

  Furthermore, the fixing part 42 has a protruding part 42 b for fitting with a through hole 21 a provided in the base 21 of the LED module 20. The protrusion 42b is provided so as to protrude from the fixed surface 42a. The protruding portion 42b functions as a position restricting portion that restricts the position of the LED module 20. That is, the protrusion 42 b is configured to determine the arrangement direction of the LED module 20, and in the present embodiment, the planar view shape of the protrusion 42 b coincides with the longitudinal direction of the base 21. The short direction is a rectangle that matches the width direction of the base 21.

  In the present embodiment, as shown in FIG. 7A, the length W1 of the fixing surface 42a in the longitudinal direction of the LED module 20 is the length of the main shaft portion 41 in the longitudinal direction of the LED module 20 (main shaft portion 41). The length W2 of the fixing surface 42a in the short direction of the LED module 20 is the length of the main shaft portion 41 in the short direction of the LED module 20 (of the main shaft portion 41). It is configured to be shorter than the diameter φ). For example, W1 = 15 mm, W2 = 4.5 mm, and φ = 8 mm.

  Thereby, even if it reduces the cross-sectional area of the part of the support | pillar 40 directly under the LED module 20 in order to suppress the light shielding by the support | pillar 40, the fall of the envelope volume of the support | pillar 40 can be suppressed. That is, even if the length W2 of the fixed surface 42a is shortened in order to suppress the light blocking of the LED module 20 by the support column 40, the contact area with the LED module 20 is increased by increasing the length W1 of the fixed surface 42a. Can be secured. Thereby, it can suppress that the thermal radiation effect of LED module 20 falls.

  Further, in the present embodiment, as shown in FIG. 7C, in the present embodiment, both side surfaces of the LED module in the short direction of the fixing portion 42 are straight surfaces 42c connected to the LED module 20. And a curved surface 42d connected to the straight surface 42c.

  The straight surface 42 c is a surface on the LED module 20 side of one side surface of the fixing portion 42, and is a surface parallel to the axis of the support column 40 (the axis of the main shaft portion 41). That is, the distance between the straight surface 42c and the axis of the support column 40 is constant toward the base side. As described above, by providing the straight surface 42c in a portion of the fixing portion 42 that is directly under the LED module 20, the light emitted from the LED module 20 toward the support column 40 side (the base 30 side) is transmitted to the support column 40 (fixed portion). It can suppress that it reflects by the part 42).

  The curved surface 42d is a surface (surface on the main shaft portion 41 side) opposite to the LED module 20 side of the one side surface of the fixed portion 42, and is an axis of the support column 40 toward the base side (lower side). It is a surface that curves away from the surface. That is, the distance between the curved surface 42d and the axis of the support column 40 is gradually increased toward the base side. Thus, by providing the curved surface 42d in the portion of the fixed portion 42 away from the LED module 20, the envelope volume of the support column 40 (fixed portion 42) is improved as compared with the case where the fixed portion is configured by only the straight surface. Can be made. Further, by providing the curved surface 42d, the light of the LED module 20 can be dropped to the base side, so that the light of the LED module 20 reflected by the support column 40 and incident on the LED module 20 again can be reduced. .

  Thus, since the side surface of the fixed portion 42 is constituted by the straight surface 42c and the curved surface 42d, the heat radiation effect of the LED module 20 is suppressed while suppressing the light of the LED module 20 from being blocked by the support column 40. Can be maintained. In this embodiment, the axial length L1 of the support column 40 of the straight surface 42c is about 0.7 mm, the axial length L2 of the support column 40 of the curved surface 42d is about 5.4 mm, and the curvature radius of the curved surface 42d is set. R was 10 mm.

  Note that the direction of the reflected light reflected by the fixed portion 42 can be adjusted as desired by appropriately changing the radius of curvature R of the curved surface 42d. Thereby, since the light which goes to the nozzle | cap | die 30 side among the light which LED module 20 emits can be adjusted, a desired light distribution characteristic is realizable. In particular, a wide light distribution angle can be realized by reflecting the side surface of the globe 10 toward the base side. Further, if the axial length L (L1 + L2) of the support column 40 of the fixed portion 42 is increased so that the light from the LED module 20 is not re-incident, it is not necessary to provide the curved surface 42d.

  The support column 40 configured as described above is fixed to the upper surface of the support base 50. Specifically, the main shaft portion 41 of the support column 40 and the upper surface of the support base 50 are fixed by bonding or screws. The support base 50 is provided with a through hole 51 through which the lead wire 70 passes.

  Next, the connection relationship between the LED module 20 and the support column 40 in the light bulb shaped lamp 1 according to the present embodiment will be described in detail with reference to FIG. FIG. 8 is a diagram for explaining a connection relationship between the LED module and the support in the light bulb shaped lamp according to the embodiment of the present invention. 8A is a top view of the LED module in a state of being fixed to the support column, and FIG. 8B is a cross-sectional view taken along the line BB ′ of FIG. ) Is a cross-sectional view taken along the line CC ′ in FIG. In FIG. 8, the metal wiring 24 is not shown.

  As shown to (a) of FIG. 8, the LED module 20 and the support | pillar 40 are arrange | positioned so that the fixed surface 42a of the fixing | fixed part 42 in the support | pillar 40 may not overlap with the LED chip 22 when planarly viewed. In the present embodiment, the fixing surface 42 a of the fixing portion 42 is configured not to overlap the sealing member 23 that is the light emitting portion of the LED module 20. That is, the support column 40 is arranged so that the fixing surface 42 a of the fixing portion 42 is not positioned below the LED chip 22 and the sealing member 23. In other words, the support column 40 is disposed so that the fixing surface 42 a of the fixing unit 42 overlaps the non-light emitting unit of the LED module 20.

  As shown in FIGS. 8B and 8C, the LED module 20 is arranged with the surface of the base 21 (the surface on which the sealing member 23 is formed) facing the top of the globe 10. In the present embodiment, the LED module 20 brings the base 21 into contact with the back surface of the base 21 (the surface on which the sealing member 23 is not formed) and the fixing surface 42 a of the fixing portion 42 of the support column 40. It is directly fixed to the column 40. In addition, the protrusion part 42b of the support | pillar 40 and the through-hole 21b of the base 21 are fitted, and, thereby, the position of the LED module 20 is regulated and the attitude | position of the LED module 20 is fixed.

  Although not shown, an adhesive is applied between the back surface of the base 21 and the fixing surface 42a of the fixing portion 42, whereby the support column 40 and the base 21 are fixed. As the adhesive, for example, an adhesive made of a silicone resin can be used. In order to efficiently conduct the heat of the LED module 20 to the support column 40, it is preferable to use an adhesive having a high thermal conductivity. For example, the thermal conductivity can be increased by dispersing metal fine particles in a silicone resin.

  Next, the effect of the light bulb shaped lamp 1 according to the present embodiment will be described with reference to FIG. FIG. 9 is a diagram showing a state when the light bulb shaped lamp according to the embodiment of the present invention is turned on.

  As shown in FIG. 9, when the light bulb shaped lamp 1 is turned on, the LED chip 22 of the LED module 20 emits light, and the LED module 20 emits light to the surroundings. Specifically, the light emitted from the LED chip 22 is emitted toward the upper side, the side, and the lower side of the LED chip 22, and becomes white light by the sealing member 23 and radiates around the LED module 20. Is done. Among these, a part of the light emitted from the back side of the base 21 is reflected and blocked by the support column 40. That is, a shadow is generated by the column 40.

  In the present embodiment, the fixing surface 42a of the fixing portion 42 of the support column 40 is configured not to overlap the LED chip 22 in a plan view (when viewed from the top of the globe 10 toward the base 30). . That is, the support column 40 does not exist immediately below the LED chip 22 having the strongest light output among the LED modules 20. Thereby, since it can suppress that the light of the LED module 20 is interrupted by the support | pillar 40, the extraction efficiency of the light to the nozzle | cap | die side of the LED module 20 can be improved.

  In particular, in the present embodiment, the fixed surface 42a of the support column 40 is configured not to overlap with the sealing member 23 serving as a light emitting unit in plan view. Thereby, since it can suppress further that the light of the LED module 20 is interrupted by the support | pillar 40, the taking-out efficiency of the light to the nozzle | cap | die side of the LED module 20 can further be improved.

  In the present embodiment, the side surface immediately below the LED module 20 of the fixing portion 42 is the straight surface 42c, and the side surface following the straight surface 42c of the fixing portion 42 is the curved surface 42d. Thereby, the envelope surface can be secured by the curved surface 42d and the heat radiation effect of the LED module 20 can be secured while the light shielding of the LED module 20 by the support column 40 is suppressed by the straight surface 42c.

  Furthermore, by providing the curved surface 42d, it is possible to reduce the light of the LED module 20 reflected by the support column 40 and entering the LED module 20 again. That is, when the fixed portion 42 does not have the curved surface 42d and is composed of only the straight surface 42c, a step having a surface parallel to the base 21 is formed between the fixed portion 42 and the main shaft portion 41. The light of the LED module 20 is reflected by the stepped surface (the exposed upper surface of the main shaft portion 41) and reenters the LED module 20. On the other hand, as in the present embodiment, by providing the curved surface 42d, the light of the LED module 20 can be reflected by the curved surface 42d and dropped below the support column 40. It is possible to suppress re-incident light of the module 20. Thereby, the color shift etc. by light re-incident can be suppressed.

  Here, in the light bulb shaped lamp 1 according to the embodiment of the present invention, the relationship between the length L of the fixing portion 42 and the luminous flux will be described with reference to FIG. FIG. 10 is a diagram for explaining the relationship between the length of the fixed portion and the luminous flux in the light bulb shaped lamp according to the embodiment of the present invention. In FIG. 10, the length L of the fixing portion on the horizontal axis is the axial length L (L1 + L2) of the support column 40 of the fixing portion 42 in FIG. Further, the luminous flux on the vertical axis indicates the luminous flux toward the base side of the LED module 20 and is 100% when L = 0.

  As shown in FIG. 10, when the length L of the fixing portion 42 is increased, the light flux increases as compared with the case where L = 0 (in the case of no fixing portion). On the other hand, when the length L of the fixed portion 42 exceeds 6 mm, it can be seen that the luminous flux does not increase. This means that in order to increase the luminous flux, it is only necessary to configure so that the support column 40 does not exist within a predetermined range immediately below the LED module 20, and within 6 mm below the base 21 as shown in FIG. It is preferable to configure so that the column 40 does not exist.

(Modification)
Next, modifications of the light bulb shaped lamp according to the above embodiment will be described below with reference to the drawings. The light bulb shaped lamp according to each modification described below and the light bulb shaped lamp 1 according to the above-described embodiment are different in the shape of the fixing portion of the column. Since the other configuration is the same as that of the above-described embodiment, detailed description is omitted.

(Modification 1)
First, Modification 1 of the present invention will be described with reference to FIG. 11A. FIG. 11A is a diagram illustrating a configuration of an LED module and a column in a light bulb shaped lamp according to a first modification of the present invention.

  As shown in FIG. 11A, in the light bulb shaped lamp according to the first modification of the present invention, the fixed portion 42A of the support column 40A has a truncated cone shape, and the side surface is separated from the axis of the support column 40A toward the base side of the fixed portion 42A. Thus, the inclined surface (tapered surface) is inclined. That is, the distance between the surface of the fixing portion 42A and the axis of the support column 40A gradually increases toward the base side.

  Also in this modification, since the support column 40A does not exist below the LED chip 22 and the sealing member 23, the light extraction efficiency to the base side of the LED module 20 can be improved as in the above embodiment. it can.

  However, in the present modification, the area of the fixing surface 42a of the fixing portion 42A is smaller than the area of the fixing surface 42a of the fixing portion 42 in the above embodiment, so that the LED module 20 is compared with the above embodiment. The heat dissipation is slightly reduced.

(Modification 2)
Next, Modification 2 of the present invention will be described with reference to FIG. 11B. FIG. 11B is a diagram showing a configuration of the LED module and the support in the light bulb shaped lamp according to the second modification of the present invention.

  As shown in FIG. 11B, in the light bulb shaped lamp according to the second modification of the present invention, the fixing portion 42B of the support column 40B is constituted by a columnar portion 42B1 and a truncated cone portion 42B2. The diameter of the cylindrical part 42B1 is the same as the diameter of the upper surface of the truncated cone part 42B2, and is smaller than the diameter of the lower surface of the truncated cone part 42B2. The diameter of the lower surface of the truncated cone part 42B2 is the same as the diameter of the main shaft part 41. The side surface of the truncated cone portion is an inclined surface (tapered surface) that is inclined so as to be away from the axis of the support column 40B.

  Also in this modification, since the support column 40B does not exist below the LED chip 22 and the sealing member 23, the light extraction efficiency to the base side of the LED module 20 can be improved. In addition, in the present modification, the portion fixed to the LED module 20 in the support column 40B is the small-diameter cylindrical portion 42B1, and therefore, the light extraction efficiency to the base side of the LED module 20 is further improved as compared with the modification 1. Can be made.

  However, since the area of the fixing surface 42a of the fixing portion 42B is smaller than the area of the fixing surface 42a of the fixing portion 42 in the above embodiment in the present modification as well as the first modification, The heat dissipation of the LED module 20 is slightly reduced compared to the above embodiment.

(Modification 3)
Next, Modification 3 of the present invention will be described with reference to FIG. 11C. FIG. 11C is a diagram showing a configuration of the LED module and the support in the light bulb shaped lamp according to the third modification of the present invention.

  As shown in FIG. 11C, in the light bulb shaped lamp according to the third modification of the present invention, the entire fixing portion 42C of the support column 40C is configured by a small-diameter columnar member. Note that the diameter of the fixed portion 42C in the present modification is the same as the diameter of the cylindrical portion 42B1 in the second modification.

  Also in this modification, since the support column 40C does not exist below the LED chip 22 and the sealing member 23, the light extraction efficiency to the base side of the LED module 20 can be improved. In addition, in the present modification, the entire fixing portion 42C of the support column 40C has a small diameter, so that the light extraction efficiency to the base side of the LED module 20 can be further improved as compared with Modification 2.

  However, in the present modification, the volume of the fixing portion 42C is smaller than that in Modifications 1 and 2, and thus the heat dissipation of the LED module 20 is slightly reduced compared to Modifications 1 and 2.

(Modification 4)
Next, Modification 4 of the present invention will be described with reference to FIG. 11D. FIG. 11D is a diagram showing a configuration of an LED module and a column in a light bulb shaped lamp according to a fourth modification of the present invention.

  As shown in FIG. 11D, the light bulb shaped lamp according to the modified example 4 of the present invention is configured such that the length in the longitudinal direction of the LED module 20 of the fixing portion 42 </ b> D is longer than the diameter of the main shaft portion 41. That is, in the present modification, in the first modification, the fixing portion is configured to extend in the longitudinal direction of the LED module 20.

  Also in this modification, since the support column 40D does not exist below the LED chip 22 and the sealing member 23, the light extraction efficiency to the base side of the LED module 20 can be improved. In addition, in the present modification, since the fixing portion 42D is extended, the area of the fixing surface 42a is increased, so that it is possible to suppress a decrease in heat dissipation as in the first to third modifications. it can.

  As described above, in the present modification, as in the first embodiment, the heat radiation effect of the LED module 20 can be maintained while suppressing the light of the LED module 20 from being blocked by the support column 40D.

  As described above, the light bulb shaped lamp according to the present invention has been described based on the embodiments and the modified examples. However, the present invention is not limited to these embodiments and modified examples.

  For example, in the above-described embodiment and modification, the LED module 20 is configured to emit white light by the blue LED and the yellow phosphor, but is not limited thereto. For example, a phosphor-containing resin containing a red phosphor and a green phosphor may be used so that white light is emitted by combining this with a blue LED.

  The LED chip 22 may be an LED that emits a color other than blue. For example, when an ultraviolet light emitting LED chip is used as the LED chip 22, a combination of phosphor particles that emit light in three primary colors (red, green, and blue) can be used as the phosphor particles. Furthermore, a wavelength conversion material other than the phosphor particles may be used. For example, the wavelength conversion material absorbs light of a certain wavelength such as a semiconductor, a metal complex, an organic dye, or a pigment, and has a wavelength different from the absorbed light. A material containing a substance that emits light may be used.

  In the above embodiments and modifications, the LED is exemplified as the light emitting element. However, a semiconductor light emitting element such as a semiconductor laser, an EL element such as an organic EL (Electro Luminescence) or an inorganic EL, and other solid state light emitting elements. May be used.

  Moreover, in said embodiment and modification, although the LED module 20 was set as the COB type structure which mounted the LED chip directly on the base 21, it is not restricted to this. For example, a package type in which an LED chip is mounted in a resin-molded container (cavity) and the concave portion of the container is sealed with a phosphor-containing resin, that is, a surface mount type (SMD) LED element is used. It is also possible to use an LED module configured by mounting a plurality of SMD type LED elements on a substrate.

  Moreover, this invention can also be implement | achieved as an illuminating device provided with said bulb-type lamp. For example, as shown in FIG. 12, the lighting device 2 according to the present invention may be configured to include the light bulb shaped lamp 1 and a lighting fixture (lighting fixture) 3 to which the light bulb shaped lamp 1 is attached. Good. In this case, the lighting fixture 3 turns off and turns on the light bulb shaped lamp 1 and includes, for example, a fixture main body 4 attached to the ceiling and a lamp cover 5 that covers the light bulb shaped lamp 1. Among these, the appliance main body 4 has a socket 4 a for attaching the cap 30 of the light bulb shaped lamp 1 and supplying power to the light bulb shaped lamp 1. A translucent plate may be provided in the opening of the lamp cover 5.

  In addition, as long as it does not deviate from the gist of the present invention, various modifications conceived by those skilled in the art are applied to the present embodiment and the modified examples, or a form constructed by combining the constituent elements in the embodiments and modified examples, It is included within the scope of the present invention.

  INDUSTRIAL APPLICABILITY The present invention is useful as a light bulb shaped lamp that replaces a conventional incandescent light bulb and the like, and can be widely used in lighting devices and the like.

DESCRIPTION OF SYMBOLS 1 Light bulb-shaped lamp 2 Lighting device 3 Lighting fixture 4 Appliance main body 4a Socket 5 Lamp cover 10 Globe 11 Opening 20 LED module 21 Base 21a, 21b, 51 Through-hole 22 LED chip 22a Sapphire substrate 22b Nitride semiconductor layer 22c Cathode electrode 22d Anode electrode 22e, 22f Wire bond part 23 Sealing member 24 Metal wiring 25 Gold wire 26 Chip bonding material 30 Base 40, 40A, 40B, 40C, 40D Post 41 Main shaft part 42, 42A, 42B, 42C, 42D Fixed part 42B1 Cylindrical portion 42B2 Frustum portion 42a Fixed surface 42b Projection portion 42c Straight surface 42d Curved surface 50 Support base 60 Resin case 61 First case portion 62 Second case portion 70 Lead wire 80 Lighting circuit 100, 200 Light bulb type L D Lamp 110 covers 120, 220 LED modules 130, 230 die 160 insulating member 180 lighting circuit 190 outer member 191 laps portion 192 light source mounting portion 193 recess 210 Grove 240 posts

Claims (13)

A light bulb shaped lamp having a globe and a base,
A metal column provided to extend inward of the globe,
A light emitting module disposed in the globe and fixed to the support;
The light emitting module has a translucent base and a light emitting element mounted on the base,
The support column has a fixed surface fixed to the center position of the base of the light emitting module,
The light emitting module and the support column are arranged so that the fixed surface and the light emitting element do not overlap when viewed in plan.
Light bulb shaped lamp.   The base is a long rectangular substrate,
  The light-emitting elements are mounted in a plurality of rows along the longitudinal direction of the base as a single device row,
  The column is arranged such that the fixed surface is located between one element row and the other element row in the plurality of element rows.
  The light bulb shaped lamp according to claim 1. The light emitting module further includes a sealing member for sealing the light emitting element,
The sealing member includes a wavelength conversion material that converts a wavelength of light emitted from the light emitting element, and a resin containing the wavelength conversion material,
The sealing member is formed so as not to overlap the fixed surface when viewed in plan.
The light bulb shaped lamp according to claim 1.   The base is a long rectangular substrate,
  The sealing member is formed in a plurality of rows along the longitudinal direction of the base,
  The support column is disposed such that the fixed surface is positioned between one sealing member and another sealing member in the plurality of rows of the sealing members.
  The light bulb shaped lamp according to claim 3.   The fixed surface has a shape that is elongated along the longitudinal direction of the base.
  The light bulb shaped lamp according to any one of claims 1 to 4. The light emitting module is elongated when viewed in plan,
The support column includes a main shaft portion, and a fixing portion located between the main shaft portion and the light emitting module and having the fixing surface.
The length of the fixing surface in the longitudinal direction of the light emitting module is longer than the length of the main shaft portion in the longitudinal direction of the light emitting module,
The length of the fixed surface in the short direction of the light emitting module is shorter than the length of the main shaft portion in the short direction of the light emitting module,
The light bulb shaped lamp according to claim 1 or 3 . A side surface of the fixing portion is connected to the light emitting module, is connected to a straight surface parallel to the axis of the support column, and is connected to a lower portion of the straight surface, and bends away from the axis of the support column toward the base side. Including curved surface,
The light bulb shaped lamp according to claim 6 . The side surface of the fixed portion includes an inclined surface that is inclined so as to be away from the axis of the support column toward the base side.
The light bulb shaped lamp according to claim 6 . The base is a ceramic substrate made of Al ₂ O ₃ , AlN or MgO.
The light bulb shaped lamp according to any one of claims 1 to 8 . The support column is made of aluminum.
The light bulb shaped lamp according to any one of claims 1 to 9 .   Furthermore, it comprises two lead wires for supplying power to the light emitting element,
  The two lead wires are electrically connected to metal wiring formed on the base,
  The light bulb shaped lamp according to any one of claims 1 to 10. further,
A lead wire for supplying power to the light emitting element;
An insulating case that houses a lighting circuit for lighting the light emitting element,
The light bulb shaped lamp according to any one of claims 1 to 10 . An illumination device comprising the light bulb shaped lamp according to any one of claims 1 to 12 .

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