JP6300095B2 - Lighting device - Google Patents

Description

  The present invention relates to an illuminating device including a semiconductor light emitting element such as an LED (Light Emitting Diode), and more particularly to an illuminating device provided on an indoor ceiling side.

2. Description of the Related Art In recent years, lighting devices that use semiconductor light emitting elements such as LEDs as light sources have been adopted for various lighting fixtures, including general lighting such as indoors. The lighting fixture using the LED generally includes a light emitting module in which a plurality of LED elements are mounted on a substrate, and a drive circuit that supplies power to the light emitting module to light the LED elements.
As specific examples of indoor LED lighting fixtures, for example, as shown in Patent Document 1, a pendant type lighting fixture that is suspended from the ceiling, and a light bulb-shaped LED lamp is used in the pendant type lighting fixture. Things are known.

  Such an indoor LED lighting device is suitable for brightening the entire room because the light emitted from the light emitting module spreads over the entire room and illuminates the floor and walls. .

JP 2014-53109 A JP 2008-234908 A

In the illumination device installed on the ceiling side of the room as described above, there is a case where it is desired to irradiate the area on the floor side directly under the illumination device more brightly. For example, when reading or studying on a table directly under the lighting device, it is desirable to irradiate the table brightly.
In order to illuminate directly under the lighting device installed on the ceiling side, the amount of light emitted from the light source should be increased, but in that case, the amount of light applied to the entire room will increase, and you will sit on a chair next to the table. Increasing the amount of light that directly enters the eyes of people. When the amount of light directly entering the eye from the lighting device increases in this way, it causes glare (“glare” that causes discomfort and difficulty in seeing objects), particularly for elderly people.

  In view of the above problems, the present invention can provide a lighting device including a light emitting module in which a semiconductor light emitting element is provided, and can illuminate a hand more brightly while the room can be moderately brightened and the glare felt by a person can be suppressed. The purpose is to provide things.

  In order to achieve the above object, a lighting device according to one embodiment of the present invention includes a support member provided with a power receiving unit that receives power, one end supported by the support member, and an opening formed on the other end side. A light diffusing globe, and a light source that is installed inside the globe and includes at least one light emitting module in which one or more semiconductor light emitting elements are arranged on a substrate, and is turned on with the power received by the power receiving unit; A reflector that is inserted into the opening of the globe and reflects a part of the light emitted from the light source and focuses the light from the opening, and the globe emits one of the remaining lights emitted from the light source. The part is diffused and emitted radially around the light flux that is converged and emitted from the reflector.

  In the illuminating device according to the above aspect, since a part of the light emitted from the light source is focused and emitted by the reflector, the front of the focused light can be intensively brightened. Therefore, by attaching this lighting device to the ceiling side of the room and converging the light vertically downward, it is possible to avoid the direct light entering the human eye while limiting the light device vertically below the lighting device. Only the area can be illuminated brightly.

Further, the remaining part of the light emitted from the light source is diffused by the globe and is emitted radially around the luminous flux that is converged and emitted from the reflector, so that the diffused light brightens the room as a whole. can do.
Therefore, it is not dazzling to human eyes, the hand can be brightened, and the whole room can be brightened appropriately.

1 is a schematic cross-sectional view illustrating a configuration of a lighting fixture 1 according to Embodiment 1. FIG. It is a perspective view of the LED lamp 10 used for the lighting fixture 1. FIG. 1 is a schematic sectional view of an LED lamp 10. FIG. It is a figure which shows the circuit structure of the circuit unit 70 and the light emitting modules 30 and 50. FIG. (A)-(c) is a figure which shows the state which lighted the lighting fixture 1 equipped with the LED lamp 10 in each mode. (A) is a figure which shows a mode that the light radiate | emitted from each module advances in the LED lamp 10, (b) is a figure which shows a mode that the lighting fixture 1 irradiates a room. FIG. 4 is a schematic cross-sectional view showing a configuration of an LED lamp 11 according to a second embodiment. FIG. 5 is a schematic cross-sectional view showing a configuration of an LED lamp 12 according to a third embodiment. (A) is a perspective view of the LED lamp 110 concerning Embodiment 4, (b) is the schematic sectional drawing. (A), (b) is a schematic sectional drawing which shows the structure of the LED lamps 13 and 14 concerning a modification.

[Embodiment 1]
FIG. 1 is a cross-sectional view illustrating a configuration of a lighting fixture 1 according to the first embodiment.
FIG. 2 is a perspective view (partially cross-sectional view) of the LED lamp 10 mounted on the luminaire 1.
FIG. 3 is a schematic cross-sectional view of the LED lamp 10.
The Z direction in FIGS. 1 to 3 is the front where light is emitted from the LED lamp 10.

As shown in FIG. 1, the central axis J of the LED lamp 10 mounted on the luminaire 1 is along the vertical direction. The luminaire 1 includes an appliance body 2 suspended from the ceiling, and the interior of the appliance body 2. A socket 3 provided on the main body 2 and a flange 4 extending outward from the instrument body 2.
The LED lamp 10 is an LED lamp as an alternative to an incandescent bulb. The LED lamp 10 is used by being attached to the lighting fixture 1 suspended from the ceiling.

  2 and 3, the LED lamp 10 includes a case 20 as a support member, a light emitting module 30 and a light emitting module 50 that serve as a light source, a reflector 40 that reflects light from the light emitting module 30 and focuses the light forward. A light diffusing glove 60 that diffuses light from the light emitting module 50, a circuit unit 70, a base 80 that is attached to the rear end of the case 20 and receives power is provided.

  Then, by attaching the base 80 of the LED lamp 10 to the socket 3 of the lighting fixture 1, the LED lamp 10 is attached to the lighting fixture 1, and power is supplied from the lighting fixture 1 to the LED lamp 10 via the base 80. The The LED lamp 10 turns on the light source with the received power and emits light outward through the reflector 40 or the globe 60.

Each part which comprises the LED lamp 10 is demonstrated in detail below.
(Case 20)
The case 20 has a cylindrical shape whose diameter gradually increases from the rear toward the front, and the circuit unit 70 is accommodated in the case 20.
A rear end 61 of the globe 60 is supported on the front end 20 a of the case 20, and a base 80 is attached to the rear end of the case 20. That is, the case 20 serves as a support member provided with a power receiving unit that receives power.

The case 20 has an opening at its front end 20a, and a disk-shaped lid 21 is fitted into the opening. The light emitting module 50 is mounted on the front surface of the lid body 21, and the rear end portion 61 of the globe 60 is fixed around the lid body 21.
The rear end portion 22 of the case 20 has a cylindrical shape so as to fit the base 80, and a thread for engaging the base 80 is formed on the outer peripheral surface thereof.

The case 20 may be formed of a heat conductive resin (polybutylene terephthalate or the like), ceramic, or the like, or may be formed of a metal (for example, aluminum). By forming the case 20 with a heat conductive metal, heat generated in the light emitting module 50 and the circuit unit 70 can be efficiently radiated to the outside.
(Light emitting module 30, 50)
The LED lamp 10 includes two light emitting modules 30 and 50 as light sources. The light emitting module 30 is installed in the reflector 40, and the light emitting module 50 is installed on the rear side of the reflector 40.

The light emitting modules 30 and 50 are both provided on the central axis J, and light is emitted forward from the light emitting modules 30 and 50.
The light emitting module 50 is configured by forming, on the front surface of a module substrate 51, a light emitting unit 52 in which nLED elements 52a are arranged as a plurality of semiconductor light emitting elements.
The module substrate 51 is a wiring substrate having a disk shape slightly smaller in diameter than the lid body 21 and having a wiring layer provided on the front side of the insulating substrate body. The plurality of LED elements 52 a are mounted on the wiring layer in the module substrate 51.

As each LED element 52a, a COB (Chip On Board) type LED element may be used, and the light emitting section 52 may be formed by sealing with a sealing layer, or SMD (Surface Mount Device, surface mount component). The light emitting part 52 can also be formed using a shaped LED element.
The light emitted from each LED element 52a is converted into the light color classification (bulb color, warm white, white, day white, daylight color) that the LED lamp 10 intends to realize by the phosphor. Or according to the use of the lighting fixture used as LED element 52a, the thing of the emission color of red, blue, and green may be used, and you may combine each color.

As an example of the LED element 52a, an SMD type high-intensity LED element that emits white light by a blue LED chip and a yellow phosphor can be cited. In this case, part of the blue light emitted from the LED chip is converted to yellow-green light by the phosphor, and the yellow-green light and the blue light are mixed to emit white light.
The plurality of LED elements 52 a are arranged in a matrix on the module substrate 51. However, the arrangement form of the LED elements 52a may be staggered or radial. What is necessary is just to set suitably the number of LED elements 52a, a connection method (series connection, parallel connection), etc. according to the light-emission quantity calculated | required by the LED lamp 10. FIG. The number of LED elements 52a mounted on the module substrate 51 is not limited to a plurality, and may be one.

The light emitting module 50 is installed on the front surface of the lid body 21 as described above, and a lead wire 53 that supplies power from the circuit unit 70 to the light emitting module 50 is installed between the light emitting module 50 and the circuit unit 70. Yes.
The light emitting module 30 has the same configuration as that of the light emitting module 50, and a light emitting unit 32 in which a plurality of LED elements 32 a are arranged is formed on the front surface of the module substrate 31.

The module substrate 31 is a wiring substrate in which a wiring layer is formed on the surface of an insulating substrate, and has a disk shape slightly smaller in diameter than the bottom 41 of the reflector 40.
The light emitting module 30 is provided in the reflector 40 in a state where the module substrate 31 is fixed on the bottom 41 of the reflector 40 with an adhesive.
Lead wires 33 and 34 for supplying power from the circuit unit 70 to the light emitting module 30 are installed between the light emitting module 30 and the circuit unit 70. The lead wire 34 penetrates the lid 21 from the circuit unit 70 and is connected to the lead wire 33 by the connector 35.

(Glove 60)
The globe 60 is a hollow light-transmitting member having a substantially spherical shape, and its rear end side is opened to be attached to the front end portion of the case 20, and the front end side of the globe 60 is also inserted into the reflector 40. An opening 62a is formed in the opening.
The globe 60 has a rear end 61 attached to the front end 20 a of the case 20. As a method of attaching the rear end portion 61 of the globe 60 to the front end portion 20a of the case 20, for example, as shown in FIG. 3, the rear end portion 61 of the globe 60 is fitted inside the front end portion 20a of the case 20. A method of fixing with an adhesive made of silicone resin in a state of being sandwiched between the outer peripheral surface of the module substrate 51 and the inner peripheral surface of the front end portion 20a of the case 20 can be mentioned.

Light emitting modules 30 and 50 that are light sources are installed inside the globe 60.
The reflector 40 is held at the front end 62 of the globe 60, and the globe 60 also plays a role of supporting the reflector 40.
The material of the globe 60 is preferably glass, translucent ceramics, or a resin (polycarbonate) having excellent light transmissivity. And the light diffusibility can be provided to the globe 60 by making the material contain particles having a high refractive index.

  As another method of imparting light diffusibility to the globe 60, a method of treating the surface of the glass material into a ground glass (sand surface) shape (frost type light diffusing plate), after treating the surface of the glass material into a ground glass shape, Method of corrugation formation by corroding the surface with hydrogen fluoride etc. (corrosion type light diffusion plate), method of applying a milky white film on the surface of a transparent glove (opal type light diffusion plate), minute lens array on the surface of the globe (Lens light diffusion plate) and the like.

(Reflector 40)
The reflector 40 has a cup shape whose diameter increases from the rear to the front, and is set to a size that fits into the opening 62 a inside the front end 62 of the globe 60. The outer edge portion of the reflector 40 is fixed to the front end portion 62 of the globe 60.
On the rear end side of the reflector 40, there is a disc-shaped bottom portion 41, and the light emitting module 30 is mounted on the front surface of the bottom portion 41. As a result, the light emitting module 30 is installed inside the globe 60.

The inner surface of the reflector 40 is a smooth reflecting surface 42 so that light from the light emitting module 30 is reflected and narrowed to a certain range in front.
The reflector 40 can be produced by molding a metal plate such as aluminum. Alternatively, the resin may be molded into the shape of the reflector 40, and a metal layer such as an aluminum deposition film may be formed on the inner surface thereof to form the reflecting surface 42, or a white reflecting layer containing a white pigment such as titanium oxide may be formed. The reflective surface 42 may be used.

The reflection surface 42 has a rotationally symmetric shape with respect to the central axis J of the LED lamp 10.
When the light emitted from the light emitting module 30 is reflected by the reflecting surface 42, the reflected light spreads symmetrically with respect to the central axis J, but the spreading angle (orientation angle) is the light emitted from the light emitting module 30. Since it becomes smaller than the orientation angle, the focused light is emitted.
The shape (height and opening width) of the reflecting surface 42 is set so that the orientation angle of the focused light is about 80 ° or less, for example, about 60 °.

  As a specific example of the shape of the reflecting surface 42, the reflecting surface 42 is made a parabolic shape, and the light emitting module 30 is placed near the focal point F so that the reflected light is emitted forward as light close to parallel light. Can do. Alternatively, the reflecting surface 42 may be an ellipsoidal shape, and the light emitting module 30 may be placed at a position close to one of the focal points F so that the reflected light can be condensed on the other focal point.

A transparent front cover 43 that covers the opening is attached to the opening at the front end of the reflector 40. The front cover 43 is made of a translucent material such as a transparent acrylic resin.
In addition, since the reflector 40 has not only the inner surface but also the outer surface as a reflection surface, a part of the light emitted from the light emitting module 50 and applied to the reflector 40 is reflected by the outer surface of the reflector 40, It is diffused by the globe 60 and emitted outward.

(Circuit unit 70)
The circuit unit 70 includes a circuit board 71 and various elements mounted on the circuit board 71, converts electric power received through the base 80 from alternating current to direct current, and supplies the light emitting modules 30 and 50 with power.
The circuit unit 70 is mounted in the case 20. Specifically, the peripheral portion of the circuit board 71 is fitted in a groove inside the rear end portion 22 of the case 20.

FIG. 4 is a diagram illustrating a circuit configuration of the circuit unit 70 and the light emitting modules 30 and 50.
The light emitting modules 30 and 50 shown in FIG. 4 have a plurality of LED elements 32a and 52a, respectively.
The circuit unit 70 includes a rectifier circuit 73 that rectifies and smoothes AC power supplied from the base 80 via the lead wires 84 and 85, a PFC circuit 74 for improving the power factor, a controller 72, a rectifier circuit 73, and a PFC ( (Power Factor Correction) circuit 74 and two constant current circuits 75a and 75b.

The rectifier circuit 73 is composed of, for example, a diode bridge, and rectifies and converts the alternating current supplied from the external power supply AC through the base to direct current.
The PFC circuit 74 is composed of a known boost chopper circuit, and improves the input power factor.
The constant current circuits 75a and 75b are configured by a known step-down chopper circuit, a step-up / step-down circuit, and the like, and receive a power supply from the PFC circuit 74 to supply a constant current to the light emitting modules 30 and 50, respectively.

The receiving unit 76 receives an input signal (infrared signal) transmitted from an external remote controller.
The controller 72 instructs the constant current circuits 75 a and 75 b to specify the current value to be supplied to the light emitting modules 30 and 50 based on the input signal input to the receiving unit 76.
The constant current circuit 75 a supplies the light emitting module 30 with a current value instructed by the controller 72. The constant current circuit 75 b supplies the light emitting module 50 with a current having a current value instructed by the controller 72.

By the circuit unit 70 having the above configuration, currents of instructed values are supplied to the light emitting module 30 and the light emitting module 50, respectively.
Thus, the light emitting module 30 and the light emitting module 50 can be independently turned on / off by the circuit unit 70, and can be driven at a constant current when turned on. For example, only one of the light emitting modules 30 and 50 can be lit, or both can be lit.
(Base 80)
The base 80 is a member for receiving power from the instrument body 2 and is connected to the instrument body 2 by being screwed into the socket 3. The base 80 also has a function of detachably fixing the LED lamp 10 to the instrument body 2.

  As shown in FIG. 3, the base 80 includes a shell portion 81 having a substantially cylindrical shape and an outer peripheral surface being a male screw, and an eyelet portion 83 attached to the shell portion 81 via an insulating portion 82. Here, a lead wire 84 is connected to the shell portion 81, and a lead wire 85 is connected to the eyelet portion 83. Then, the electric power received by the base 80 is input to the circuit unit 70 via the two lead wires 84 and 85.

The base 80 shown in FIGS. 2 and 3 is an Edison type (E type), but the type of the base is not limited to a specific base. For example, it may be a G-type base having a pair of pin-shaped terminals. Further, it may be a base having an L-shaped terminal used for hook sealing.
(Assembly method of LED lamp 10)
The circuit unit 70, the lid 21, and the light emitting module 50 are attached to the case 20, and the lead wire 34 and the lead wire 53 are wired.

In addition, a cap 80 is attached to the case 20 and lead wires 84 and 85 are wired.
On the other hand, the light emitting module 30 is attached to the reflector 40, and the lead wire 33 is connected to the light emitting module 30. Then, the reflector 40 is attached to the front end 62 of the globe 60.
In this way, the globe 60 with the reflector 40 attached is attached to the case 20 in which the circuit unit 70, the light emitting module 50 and the like are incorporated, and the lead wire 33 and the lead wire 34 are connected via the connector 35. To do.

Thus, the LED lamp 10 is assembled.
(Operation of LED lamp 10 and characteristics of emitted light)
When the light emitting module 30 is turned on, as shown in FIG. 6A, a part of the light (arrow L11) emitted from the light emitting unit 32 passes directly through the front cover 43 and is emitted forward. The Another portion (arrow L12) is reflected by the reflecting surface 42 of the reflector 40 so as to approach the central axis J, and is emitted forward from the opening of the reflector 40 through the front cover 43. The

Thus, the light (arrows L 11 and L 12) emitted from the light emitting module 30 is focused by the reflector 40 and emitted forward from the opening 62 a at the front end of the globe 60. The central axis of the focused light coincides with the central axis J of the LED lamp 10.
When the light emitting module 50 is turned on, as shown in FIG. 6A, a part of the light emitted from the light emitting portion 52 forward (arrow L21) is directly irradiated on the inner surface of the globe 60, Part (arrow L22) of the light is reflected by the outer surface of the reflector 40 and irradiated to the inner surface of the globe 60.

Thus, the light (arrows L21 and L22) irradiated on the inner surface of the globe 60 is diffused while passing through the globe 60, and the diffused light is emitted radially from the outer surface of the globe 60 as indicated by the white arrows. Is done.
This diffused light is emitted radially around the central axis J. That is, the diffused light from the globe 60 is emitted radially around the light beam that is focused and emitted forward from the reflector 40.

  Here, the luminous intensity (light flux per unit solid angle emitted from the lamp) increases in the direction in which the light is focused and emitted. Therefore, when the light emitting module 30 and the light emitting module 50 included in the light source of the LED lamp 10 are all turned on, the luminous intensity on the central axis (that is, the central axis J) of the light beam converged and emitted from the reflector 40 is It becomes larger than the luminous intensity emitted in any other direction.

Next, the light source switching operation will be described.
Here, it is assumed that the operator selects and instructs from three modes (A: full irradiation mode, B: hand irradiation mode, C: diffusion mode) with the remote controller.
In the circuit unit 70 of the LED lamp 10, the controller 72 turns ON / OFF the constant current circuit 75a and the constant current circuit 75b based on an input signal input to the receiving unit 76, respectively. Accordingly, the light emitting module 30 and the light emitting module 50 are independently controlled on / off. Thereby, the LED lamp 10 is switched to three modes (A: full irradiation mode, B: hand irradiation mode, C: diffusion mode).

FIGS. 5A to 5C show a state in which the luminaire 1 equipped with the LED lamp 10 is lit in each of the A, B, and C modes.
A: All Irradiation Mode When a signal instructing A: All Irradiation Mode is input to the receiving unit 76, the controller 72 turns on both the constant current circuit 75a and the constant current circuit 75b. Accordingly, both the light emitting module 30 and the light emitting module 50 are turned on. As shown in FIG. 5A, the LED lamp 10 emits focused light indicated by arrows and diffused light indicated by white arrows.

B: Hand irradiation mode When a signal instructing B: hand irradiation mode is input to the receiving unit 76, the controller 72 turns on the constant current circuit 75a and turns off the constant current circuit 75b. Accordingly, the light emitting module 30 is turned on and the light emitting module 50 is turned off. As shown in FIG. 5B, the LED lamp 10 emits focused light indicated by an arrow, and does not emit diffused light.

   When a signal instructing the C: diffusion mode is input to the receiving unit 76, the controller 72 turns on the constant current circuit 75b and turns off the constant current circuit 75a. Accordingly, the light emitting module 50 is turned on and the light emitting module 30 is turned off. As shown in FIG. 5C, diffused light indicated by white arrows is emitted from the LED lamp 10, and focused light is not emitted.

(Effects of the characteristics of the LED lamp 10)
The LED lamp 10 as an illuminating device has a support member (case 20) provided with a power receiving unit (cap 80) for receiving power and a rear end 61 supported by the case 20, and an opening 62a is formed on the front end side. A light diffusing globe 60, a light source, and a reflector 40.
The light source is installed inside the globe 60, the light emitting module 30 in which one or more LED elements 32a are arranged on the module substrate 31, and the light emitting module in which one or more LED elements 52a are arranged on the module substrate 51. 50 and is lit with the power received by the power receiving unit.

The reflector 40 is fitted into the opening 62a of the globe 60, and reflects a part of the light emitted from the light source and emits it while converging from the opening 62a. The globe 60 diffuses a part of the remaining light emitted from the light source and emits it radially around the luminous flux converged and emitted from the reflector 40.
Thereby, it is not dazzling to human eyes, the hand can be brightened, and the entire room can be brightened appropriately.

This will be described with reference to the specific example of FIG. FIG. 6B shows a state in which the lighting fixture 1 is suspended from the ceiling and used in the A mode state in which both the light emitting modules 30 and 50 in the LED lamp 10 are lit. A table is placed directly under the lighting fixture 1, and a person sitting on a chair next to the table places a book on the table and reads it.
The focused light emitted vertically downward from the reflector 40 of the LED lamp 10 irradiates only a limited range, and forms an irradiation spot S on the table vertically below the LED lamp 10.

Therefore, the hand on the table becomes brighter when irradiated with the focused light, and the focused light can be prevented from directly hitting the human eye.
Further, the light emitted from the light emitting module 50 is diffused by the globe 60 and emitted so as to emit light from the outer peripheral surface of the globe 60 as indicated by the white arrow. The diffused light can brighten the entire room. And even if this diffused light enters a human eye, it does not feel so dazzling.

Therefore, according to the lighting fixture 1 provided with the LED lamp 10, while illuminating the hand brightly with the focused light, it is difficult to feel dazzling to the human eye, and the room can be brightened as a whole with the diffused light. .
Here, the LED lamp 10 includes two light emitting modules in the light source, one of which is a light emitting module 30 that emits light to the reflector 40, and the other is on the inner surface of the globe 60. The light emitting module 50 emits light. And the circuit unit 70 which turns ON / OFF the electric power supplied to the light emitting module 30 and the light emitting module 50 each independently is provided.

Further, in the LED lamp 10, the reflector 40 is cup-shaped and is fitted into the opening 62 a at the front end of the globe 60, and the light emitting module 30 is provided on the bottom 41 of the reflector 40. The light emitting module 50 is provided on the rear side of the reflector 40.
Thereby, the light emitted from the light emitting module 30 can be focused forward without being blocked by the light emitting module 50.

Further, the light emitted from the light emitting module 30 can be diffused by the globe 60 without being obstructed by the reflector 40, and can be emitted radially around the light beam focused by the reflector 40.
When a person looks at the LED lamp 10 obliquely from the front (vertically below), the focused light emitted from the reflector 40 does not enter the human eye directly, whereas the diffused light emitted from the globe 60 is Get into the eyes.

Accordingly, when the LED lamp 10 is viewed obliquely from below while the light emitting module 50 is lit, the globe 60 appears brightly shining with diffused light as shown in FIGS. The reflector 40 appears dark because it does not enter the eye. Therefore, a novel beauty is given to the person who is watching this LED lamp 10.
On the other hand, when the LED lamp 10 is viewed obliquely from the bottom when the light emitting module 50 is lit, there is no diffused light, so that the LED lamp 10 looks blackish as shown in FIG. The vertical lower part of 10 is illuminated brightly in a spot manner. This also gives the person who is watching the LED lamp 10 an innovative aesthetic.

  For example, as disclosed in Patent Document 2, a spotlight has been developed that emits light from a white light source by condensing the light from a white light source within a certain range using a condenser lens. In addition, in the LED lamp, a reflector-type reflector that provides a cup-shaped reflector that reflects light from the LED element around a light emitting module that emits white light, and reflects and focuses the light emitted from the LED element. Things are also being developed.

According to these illuminating devices, only a certain range can be illuminated brightly, so that the hand can be brightened while suppressing glare, but it is not suitable for irradiating the room moderately brightly as a whole.
On the other hand, in the LED lamp 10, in addition to being able to brighten the hand while suppressing glare, the room can be lightened moderately as a whole.

[Embodiment 2]
FIG. 7 is a schematic cross-sectional view illustrating the configuration of the LED lamp 11 according to the second embodiment.
The LED lamp 11 according to the present embodiment has the same configuration as the LED lamp 10 according to the first embodiment, but a light-diffusing light guide column 63 is provided in front of the light emitting module 50 and is introduced into the light guide column 63. The light is diffused.

In FIG. 7, the same components as those of the LED lamp 10 are denoted by the same reference numerals.
The light guide column 63 has a cylindrical shape, and its central axis coincides with the central axis J of the LED lamp 11 and is provided in front of the light emitting module 50. The light guide column 63 is formed of the same material as that of the globe 60 described in the first embodiment, and is subjected to a process for imparting light diffusibility. The light guide column 63 shown in FIG. 7 is given light diffusibility by dispersing light diffusing particles 66 having a high refractive index.

Further, the rear end surface 63b of the light guide column 63 covers the light emitting unit 52 of the light emitting module 50, and the light emitted from the light emitting unit 52 is transmitted from the rear end surface 63b to the light guide column 63 as indicated by arrows in FIG. It is supposed to go inside.
The light that has entered the light guide column 63 is diffused while traveling forward through the light guide column 63, and diffused light is radiated from the outer peripheral surface 63a as indicated by the white arrow. The diffused light is further diffused while being transmitted through the globe 60 and is emitted outward.

A part of the light emitted from the light emitting module 30 is converged by the reflector 40 and emitted forward, as indicated by the arrows, as in the LED lamp 10 of the first embodiment.
The basic effect of the LED lamp 11 is the same as that of the first embodiment.
That is, the focused light emitted from the light emitting module 30 and focused by the reflector 40 in a state where the lighting device is suspended from the ceiling does not directly hit the human eye, so that direct light does not enter the human eye. However, it is possible to irradiate vertically below the lighting device brightly. Further, the entire room can be brightened by the diffused light emitted from the globe 60, and this diffused light has little glare even if it enters the human eye.

Therefore, according to the illuminating device provided with the LED lamp 11, there is no glare in a human eye, a hand can be brightened, and the whole room can be brightened moderately by diffused light.
Similarly to the LED lamp 10 of the first embodiment, also in the LED lamp 11, the light emitting module 30 and the light emitting module 50 can be independently turned ON / OFF by the circuit unit 70.

[Embodiment 3]
FIG. 8 is a schematic cross-sectional view illustrating the configuration of the LED lamp 12 according to the third embodiment.
The LED lamp 12 has the same configuration as that of the LED lamp 10 according to the first embodiment, but as a light source, one light emitting module 50 is provided outside the reflector 40, and the reflector 40 is irradiated with light. The light emitting module 30 is not provided. Instead, a light guide column 65 that guides part of the light emitted from the light emitting module 50 to the inside of the reflector 40 is provided.

In the circuit unit 70 of the LED lamp 12, the PFC circuit 74 and the constant current circuit 75a are not provided, and the controller 72 turns the constant current circuit 75b ON / OFF based on an input signal input to the receiving unit 76. Thus, only the light emitting module 50 can be turned on / off.
The light guide column 65 has a cylindrical shape, the center axis of which coincides with the center axis J of the LED lamp 12, and is provided in front of the light emitting module 50, similar to the light guide column 63 of the second embodiment. is there. Further, the rear end surface 65b of the light guide column 65 covers the entire light emitting portion 52, and light emitted from the light emitting portion 52 enters the light guide column 65 from the rear end surface 65b as indicated by an arrow in FIG. The same is true for the points.

On the other hand, unlike the light guide column 63 of the second embodiment, the front end portion of the light guide column 65 penetrates through the bottom of the cup-shaped reflector 40 and enters the inside thereof, and the reflector 40 has a front end surface 65c. Light is emitted inside.
Further, as shown in FIG. 8, the light guide column 65 is also provided with light diffusibility by dispersing light diffusion particles 66 having a high refractive index. However, the region and the amount in which the light diffusing particles 66 are dispersed are limited so that only a part of the light entering the inside from the rear end face 65b is diffused and the remaining light reaches the front end face 65c.

Therefore, a part of the light introduced into the light guide column 65 is diffused while traveling forward through the light guide column 65, and diffused light is radiated from the outer peripheral surface 65a as indicated by a white arrow. The diffused light is further diffused while being transmitted through the globe 60 and is emitted radially outward.
On the other hand, the remaining part of the light introduced into the light guide column 65 is emitted from the front end face 65c into the reflector 40, and the emitted light is partially reflected by the reflector 40 as indicated by an arrow. Reflected by the inner surface and emitted forward while being focused.

The basic effect of the LED lamp 12 is the same as that described in the first embodiment.
That is, the focused light emitted from the light emitting module 50 and guided by the light guide column 65 and focused by the reflector 40 in a state where the lighting device is suspended from the ceiling does not directly hit the human eye. It is possible to brightly illuminate the lower part of the LED lamp 12 while avoiding direct light.

Further, part of the light emitted from the light emitting module 50 is diffused by the light diffusing light guide column 63, emitted from the outer peripheral surface of the light guide column 63, diffused by the globe 60, and emitted. The diffused light can brighten the entire room. Moreover, even if this diffused light enters a human eye, there is little glare.
Therefore, according to the LED lamp 12, there is no glare in the human eye, the hand can be brightened, and the entire room can be appropriately brightened by the diffused light.

[Embodiment 4]
FIG. 9A is a perspective view of the LED lamp 110 according to the fourth embodiment, and FIG. 9B is a schematic sectional view thereof.
The LED lamp 110 has the same configuration as the LED lamp 10 according to the first embodiment, but a cylindrical glove 64 is attached instead of the spherical glove 60.

The globe 64 is subjected to a process for imparting light diffusivity in the same manner as the globe 60, and the light emitted from the light emitting module 50 is diffused by the globe 64 and emitted outward.
On the other hand, the light emitted from the light emitting module 30 is also emitted forward in a state of being focused by the reflector 40 as in the LED lamp 10 of the first embodiment.
Also in this LED lamp 110, the same effect as the LED lamp 10 of Embodiment 1 is acquired.

  That is, the focused light emitted from the light emitting module 30 and focused by the reflector 40 in a state where the lighting device is suspended from the ceiling does not directly hit the human eye, so that direct light does not enter the human eye. However, it is possible to irradiate vertically below the lighting device brightly. Further, the entire room can be brightened by the diffused light emitted from the globe 64, and this diffused light is less dazzling even if it enters the human eye.

Therefore, according to the illuminating device provided with the LED lamp 110, there is no glare in a human eye, a hand can be brightened, and the whole room can be brightened moderately by diffused light.
Also in the LED lamp 110, the light emitting module 30 and the light emitting module 50 can be independently turned ON / OFF by the circuit unit 70.

[Modifications of Embodiments 1 to 4]
1. FIG. 10A is a diagram illustrating a configuration of an LED lamp 13 according to a modification of the third embodiment.
The light guide column 65 used in the LED lamp 12 has light diffusibility, but the LED guide 13 is different in that the light guide column 67 mounted in front of the light emitting module 50 does not have light diffusibility. ing. The front end portion of the light guide column 67 is held by the reflector 40.

  In the LED lamp 13, a part of the light emitted from the light emitting module 50 enters the light guide column 67 from the rear end face 67b. That is, light emitted mainly from the central portion of the light emitting unit 52 enters the light guide column 67. The light that has entered the light guide column 67 travels forward in the light guide column 67 and is emitted from the front end surface 67 c inside the reflector 40. The light emitted from the front end face 67c is reflected by the reflector 40 and emitted while being focused forward.

On the other hand, the remaining part of the light emitted from the light emitting module 50 (mainly light emitted from the outer peripheral portion of the light emitting unit 52) is applied to the inner surface of the globe 60, diffused by the globe 60, and emitted outward. Is done.
Therefore, the LED lamp 13 emits focused light forward, and emits diffused light radially around the LED lamp 13. Therefore, the LED lamp 13 has the same effect as the LED lamp 12 of the third embodiment.

2. In the LED lamps of the first to fourth embodiments, the base 80 is attached to the case 20 and the base 80 is inserted into the socket of the lighting fixture. However, the case 20 is not necessarily attached to the case 20. Good.
For example, by attaching the case 20 directly to the fixture body 2 of the lighting fixture 1 and connecting a wiring from the lighting fixture 1 to the circuit unit 70 in the case 20, power can be supplied from the lighting fixture 1 to the circuit unit 70. .

3. In the LED lamps 10, 11, 12, and 110 of the first to fourth embodiments, the circuit unit 70 is incorporated in the case 20, but the circuit unit may be provided outside the LED lamp. For example, a circuit unit may be incorporated in the fixture body 2 in the lighting fixture 1 shown in FIG.
4). In the LED lamps of Embodiments 1 to 4, the light from the light source is focused using only the reflector 40, but the light can be focused not only by the reflector but also by a refractor. For example, as in the LED lamp 14 shown in FIG. 10B, a condenser lens 44 is installed at the front end opening of the reflector 40, and the light emitted from the light emitting module 30 is added to the reflector 40 and condensed. The light may be further collected by the lens 44.

5. In the LED lamps of the first, second, and fourth embodiments, by changing the light emission amounts of the light emitting module 30 and the light emitting module 50, the ratio of the focused light and the diffused light emitted from the LED lamp can be made variable. .
The light emission amount of the light emitting module 30 is adjusted by the constant current circuit 75a adjusting the current for driving the light emitting module 30 by PWM control based on the current value instructed from the controller 72 in the circuit unit 70 shown in FIG. It can be carried out. The light emission amount of the light emitting module 50 can also be adjusted by adjusting the current for driving the light emitting module 30 by PWM control by the constant current circuit 75b based on the current value instructed from the controller 72.

  6). In the LED lamps 10, 11, 12, and 110, LED elements are used. However, in addition to the LED elements, organic EL elements, semiconductor laser elements, and the like can be used in the same manner.

DESCRIPTION OF SYMBOLS 1 Lighting fixture 2 Appliance main body 3 Socket 10, 11, 12, 13, 110 LED lamp (illuminating device)
20 Case (support member)
20a Front end of case 21 Lid 22 Rear end of case 30 First light emitting module (light source)
31 Module substrate 32 Light emitting part 32a LED element (semiconductor light emitting element)
40 Reflector 41 Bottom of Reflector 42 Reflecting Surface 43 Front Cover 44 Condensing Lens 50 Second Light Emitting Module (Light Source)
51 Module substrate 52a LED element (semiconductor light emitting element)
52 Light Emitting Unit 60 Globe 61 Globe Rear End 62 Globe Front End 62a Globe Opening 63 Light Guide Column (Light Guide)
64 Globe 65 Light guide column (light guide)
66 Light diffusing particles 70 Circuit unit (drive circuit)
80 base

Claims (8)

A support member provided with a power receiving unit for receiving electric power;
A light diffusing globe having one end supported by the support member and having an opening formed on the other end;
A light source that is installed inside the globe and includes one or more light-emitting modules in which one or more semiconductor light-emitting elements are arranged on a substrate, and is lit by the power received by the power receiving unit;
A reflector that is embedded in the opening in the globe and that emits while converging from the opening by reflecting a portion of the light emitted from the light source; and
The globe is
Diffusing a part of the remaining light emitted from the light source,
Radiating around the luminous flux converged and emitted from the reflector,
Lighting device. The light source includes two or more light emitting modules,
One of them is a first light emitting module that emits light to the reflector,
The other one is a second light emitting module that emits light to the inner surface of the globe.
The lighting device according to claim 1. The reflector is cup-shaped,
The first light emitting module is provided at the bottom of the reflector,
When the direction in which light is emitted from the reflector is the front,
The second light emitting module is provided on the rear side of the reflector.
The lighting device according to claim 2. Furthermore, a drive circuit for independently turning ON / OFF the power supplied to the first light emitting module and the second light emitting module is provided.
The lighting device according to claim 2 or 3. The reflector is cup-shaped,
The light emitting module constituting the light source is provided outside the reflector,
A light guide that guides a part of the light emitted from the light emitting module to the inside of the reflector;
The lighting device according to claim 1. In the light guide,
Processing to diffuse a part of the introduced light has been applied,
The lighting device according to claim 5. When one or more light emitting modules included in the light source are fully lit,
The luminous intensity on the central axis of the luminous flux converged and emitted from the reflector is larger than the luminous intensity emitted in any other direction,
The illuminating device in any one of Claims 1-6. The support member is a case;
The power receiving unit is a base attached to the support member,
The support member contains a drive circuit that converts power received from the base and supplies the converted light to the light source.
The illuminating device in any one of Claims 1-7.

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