JP6899112B2 - Lighting device - Google Patents

Description

An embodiment of the present invention relates to a lighting device.

Conventionally, light emitted from a light emitting source is focused in the optical axis direction by an optical system, and the focused light is incident on a phosphor arranged at a position facing the optical axis direction of the optical system, and light is emitted from this phosphor. There is a lighting device that emits light in the direction of the optical axis.

Since such a lighting device is configured for the purpose of irradiating light in the direction of the optical axis, it is not suitable for a lighting application in which a narrow light distribution and a wide light distribution are preferable. In addition, only the light is emitted from the phosphor in the direction of the optical axis, and the effect of shining is not taken into consideration.

Japanese Unexamined Patent Publication No. 2013-109909 Special Table 2013-535977

An object to be solved by the present invention is to provide a lighting device capable of ensuring light distribution on the side opposite to the optical axis direction of the optical system and obtaining an effect of shining.

The lighting device of the embodiment includes a light emitting source, an optical system, a light diffusing part , a glove, and a wire rod . The light emitting source emits light having an ultraviolet wavelength. The optical system collects light having an ultraviolet wavelength emitted by a light emitting source in the optical axis direction. Light diffusing portion is disposed at a position opposed to the optical axis of the optical system, a phosphor which emits visible light when excited by incident ultraviolet wavelengths of light from the light source is condensed in all directions by the optical system Has . The glove has translucency, covers the light diffusing portion, and transmits visible light emitted from the light diffusing portion in a range including 90 ° or more from the optical axis direction of the optical system. The wire rod holds the light diffusing portion in the glove at a position facing the optical axis direction of the optical system.

According to the present invention, it is expected that the light distribution to the side opposite to the optical axis direction of the optical system can be secured, and the effect of shining as if the light emitting portion is floating in the globe can be obtained.

It is sectional drawing of the lighting apparatus which shows one Embodiment. It is a perspective view of the lighting device of the same as above. It is a perspective view of the lighting device of the same as above. It is a schematic front view of one lighting body of the lighting fixture using the same lighting device.

Hereinafter, one embodiment will be described with reference to the drawings.

The lighting device 10 is shown in FIGS. 1 to 3. The lighting device 10 is, for example, a light bulb-shaped lamp that can be used by being attached to a socket for an incandescent light bulb used for general lighting. The lighting device 10 has a cylindrical shape centered on the virtual central axis z shown in FIG. 1, and the glove side is one end side and the feeding portion side is the other end side.

The lighting device 10 includes a housing 11. A light emitting module 12 (light emitting source), an optical system 13, an optical system holding portion 14, a light diffusing portion 15, a light diffusing portion holding portion 16 and a globe 17 are arranged on one end side of the housing 11, and the housing 11 is also provided. An insulating case 18 and a power feeding unit 19 are arranged on the other end side of the above. Further, the power supply unit 20 is arranged in the insulating case 18.

The housing 11 is made of, for example, a metal material. The housing 11 has an outer peripheral portion 23 formed in a cylindrical shape, one end side of the outer peripheral portion 23 is opened, and a light emitting module mounting portion 24 is provided on the other end side of the outer peripheral portion 23.

Further, the light emitting module 12 includes a substrate 27 and a light emitting source 28 mounted on the substrate 27.

The substrate 27 is arranged on one end surface of the light emitting module mounting portion 24 of the housing 11, and is fixed by a plurality of screws.

One end of the light emitting source 28 is a light emitting surface that emits light, the other end side is mounted on the substrate 27, and the light emitting source 28 is arranged in the housing 11 so that the optical axis from the center of the light emitting surface coincides with the central axis z. Has been done. The light emitting source 28 is, for example, an LED light source, which emits light having a wavelength in the blue region or less and having a wavelength in the ultraviolet region. The light emitting source 28 may emit light having a wavelength in the visible light region such as white or red. Further, the light emitting source 28 is not limited to the LED light source, and may be a semiconductor laser light source that emits laser light.

Further, the optical system 13 collects the light emitted by the light emitting source 28 in the optical axis direction a. The optical system 13 includes a primary lens 31 and a secondary lens 32 arranged in order from the light emitting source 28 along the optical axis direction a. The primary lens 31 and the secondary lens 32 are made of materials such as silicone resin, polymethyl methacrylate resin (PMMA), cycloolefin polymer (COP), polycarbonate (PC), and glass.

The primary lens 31 is formed in a hemispherical shape with one end surface side as a convex surface and the other end surface side as a flat surface, and the flat surface side covers the light emitting surface of the light emitting source 28 and is provided in close contact with or integrally with the light emitting surface.

The secondary lens 32 includes a first lens unit 33 and a second lens unit 34 that are sequentially arranged along the optical axis direction a. The first lens portion 33 has a hemispherical shape with one end surface side flat and the other end surface side convex, and the second lens portion 34 has a hemispherical shape with one end surface side convex and the other end surface side flat. Is formed in. The first lens unit 33 and the second lens unit 34 are arranged so that their plane sides face each other with a predetermined interval.

Then, the primary lens 31 injects the light emitted by the light emitting source 28 without leakage and efficiently injects the light into the secondary lens 32 (first lens unit 33). The secondary lens 32 makes the light incident from the primary lens 31 parallel light along the optical axis direction a, and emits the parallel light so as to be focused on the optical axis.

As an example, the optical system 13 can adopt an arbitrary configuration such as a member having a reflection or refraction action or a combination thereof as long as the light emitted from the light emitting source 28 can be focused in the optical axis direction a. Lenses and reflectors can be used. Further, for example, when a lens is used as the optical system 13, any lens configuration may be used, and a light guide body that guides the light emitted by the light emitting source 28 to the lens may be used.

Further, the optical system holding unit 14 holds the secondary lens 32 on the optical axis from the light emitting source 28. The optical system holding portion 14 has a first holding portion 37 that holds the first lens portion 33 of the secondary lens 32 and a second holding portion 38 that holds the second lens portion 34.

The first holding portion 37 is formed in a cylindrical shape that opens in the axial direction, has a small diameter on one end side, and has a lens fitting portion 39 that fits and holds the vicinity of the maximum outer diameter of the peripheral surface of the first lens portion 33. Is provided. The other end side of the first holding portion 37 has a larger diameter than the lens fitting portion 39, and is inserted into the housing 11 from one end side and fixed. The first holding portion 37 covers the light emitting source 28 with the housing 11 so that the light emitted by the light emitting source 28 does not leak from other than the first lens portion 33.

The second holding portion 38 is formed in a cylindrical shape that opens in the axial direction, and a lens fitting portion 40 that fits and holds the vicinity of the maximum outer diameter of the second lens portion 34 is provided on one end side. The second holding portion 38 is inserted and fixed around the lens fitting portion 39 of the first holding portion 37 from one end side, and positions the first lens portion 33 in the optical axis direction together with the one end side of the first holding portion 37. It regulates and forms a gap between the first lens portion 33 and the second lens portion 34.

Since the primary lens 31 is held on the light emitting module 12 side, the light emitting module 12 functions as a part of the optical system holding unit 14.

Further, the light diffusing unit 15 is arranged by the light diffusing unit holding unit 16 at the focal position facing the optical axis direction a of the optical system 13 or in the vicinity of the focal position.

The light diffusing unit 15 is excited by the incident light in the ultraviolet region from the light emitting source 28 and secondarily emits light so as to emit light in the visible light region in all directions. It has. The light diffusing unit 15 is sintered into a predetermined shape by adding a light emitting body into a silicone-based binder or glass. A light diffusing material such as a filler that diffuses and reflects light in the visible light region incident from the light emitting source 28 in all directions may be provided, or both a light emitting body and a light diffusing material may be provided. ..

The light diffusing portion 15 is formed in a circular sheet shape or a columnar shape in which both end faces are flat. The light diffusing unit 15 is arranged by the light diffusing unit holding unit 16 on the optical axis so that one end face facing the optical system 13 is orthogonal to the optical axis direction a. The light diffusion unit 15 has a characteristic that the half-value angle is wider than the light distribution characteristic that a general diffusion plane has.

The light diffusing portion 15 may be formed in a three-dimensional shape. The three-dimensional shape includes a sheet in which the light diffusing section 15 is arranged at an angle with respect to the optical axis direction a, and a sheet in which the light diffusing section 15 is bent.

Further, as the light diffusing portion holding portion 16, a thin and inconspicuous wire rod 43 is used. For the wire rod 43, for example, a metal wire is used. The wire rod 43 holds a light diffusing portion 15 in an intermediate portion, both ends thereof are supported by the glove 17, and the light diffusing portion 15 is at a focal position in the glove 17 facing the optical axis direction a of the optical system 13 or a focal position thereof. Place it near the focal position. Both ends of the wire rod 43 are inserted into, for example, insertion holes 48 provided in the glove 17, and are adhesively fixed.

The wire rod 43 may be attached to the optical system holding portion 14 or the housing 11 side by bending both ends in a substantially U shape, that is, it may be configured in the same manner as the filament support structure of an incandescent light bulb. .. Further, as the wire rod 43, a transparent resin or glass rod may be used, but in that case, since light may guide the inside of the wire rod 43, only the light diffusing portion 15 emits light. It is preferable to use a material that does not guide light in order to make it look like it is. Further, the light diffusing portion holding portion 16 that holds the light diffusing portion 15 may guide light, but may be a transparent disk arranged in the glove 17, a tip surface portion 47 of the glove 17, or the like.

Further, the glove 17 is made of a translucent material such as resin or glass and is formed in a cylindrical shape. The glove 17 may be transparent or translucent such as milky white.

The glove 17 has a cylindrical peripheral surface portion 46 and a tip surface portion 47 that closes one end surface of the peripheral surface portion 46. The glove 17 may be formed by forming the peripheral surface portion 46 and the tip surface portion 47 separately or integrally. An ultraviolet reflective film is formed on the inner surface of the glove 17 to prevent the transmission of ultraviolet rays to the outside. The other end of the peripheral surface portion 46 of the glove 17 is arranged on the outer periphery of the second holding portion 38 of the optical system holding portion 14, and is fixed to the housing 11 side.

The glove 17 covers the light diffusing portion 15. The light diffusing portion 15 is arranged by the wire rod 43 at a position closer to the housing 11 side than the intermediate position in the axial direction of the glove 17. An insertion hole 48 through which the end of the wire 43 is inserted is provided on the peripheral surface of the glove 17, and the end of the wire 43 inserted through the insertion hole 48 is, for example, adhesively fixed.

Then, the globe 17 transmits the light emitted from the light diffusing unit 15 in a range including 90 ° or more, with the optical axis direction a of the optical system 13 being 0 °. The range in which light can be transmitted through the glove 17, that is, the range in which light can be radiated is the range of the angle α from 0 ° to the one end side of the housing 11, and in this embodiment, the range is 0 to about 150 °. It has become.

Even if the glove 17 has a light distribution control function, for example, by providing a lens portion on the glove 17 or devising a shape in order to control the light distribution in the direction opposite to the optical axis direction a. Good.

Further, the insulating case 18 has a cylindrical shape and is attached to the other end side of the housing 11.

Further, the power feeding unit 19 is attached to the insulating case 18 on the other end side of the housing 11. The power feeding unit 19 uses a base that can be connected to a socket for an incandescent light bulb used for general lighting such as E17 and E26. It should be noted that FIGS. 1 to 3 omit the illustration of the specific structure of the base and show it schematically. Further, the power feeding unit 19 is not limited to the base, and may be a pair of pins or the like depending on the type of lamp.

Further, the power supply unit 20 is housed inside the insulating case 18. The power supply unit 20 converts an external power source such as an AC power source input from the power supply unit 19 into a predetermined lighting power source such as a DC power source and supplies it to the light emitting source 28 (light emitting module 12). The power supply unit 20 includes a circuit board 50 and a plurality of electronic components 51 mounted on the circuit board 50.

Next, FIG. 4 shows a schematic front view of one lamp body 55 of the luminaire 54 using the luminaire 10. The lighting fixture 54 is, for example, a chandelier fixture, and a plurality of lamp bodies 55 are supported by a plurality of arms projecting from the fixture body.

In the lighting body 55 of the lighting fixture 54, for example, a glass cylindrical body 57 is arranged on the upper surface of the pedestal 56, and the socket 58 is connected upward in the inside of the body 57. It is arranged.

The lighting device 10 is mounted in a state in which the glove 17 is directed upward by connecting the power feeding unit 19 to the socket 58 from above.

Then, when the external power supply is supplied to the lighting device 10 through the socket 58, the power supply unit 20 converts the external power supply into a predetermined lighting power source and supplies the light to the light emitting source 28 (light emitting module 12), and the light emitting source 28 emits light. Emit.

The light emitted by the light emitting source 28 is focused in the optical axis direction a through the primary lens 31 and the secondary lens 32 of the optical system 13, and is incident on the light diffusing unit 15. The light diffusing portion 15 in which the light from the light emitting source 28 is incident emits light in all directions. The light radiated from the light diffusing unit 15 in all directions passes through the globe 17 and is irradiated to the outside.

At this time, since the light emitted by the light emitting source 28 is the light in the ultraviolet region and the light diffusing portion 15 is a light emitting body such as a phosphor, when the light in the ultraviolet region emitted by the light emitting source 28 is incident on the light diffusing portion 15, the light is emitted. The diffuser 15 emits secondary light so that a light emitter such as a phosphor is excited by the light in the ultraviolet region to emit light in the visible light region, and the light diffuser 15 is visible in all directions centering on the light diffuser 15. It emits light in the light region. In this case, the ultraviolet reflective film provided on the inner surface of the glove 17 prevents light in the ultraviolet region from being radiated to the outside of the glove 17.

When the light emitted by the light emitting source 28 is light in the visible light region and the light diffusing portion 15 contains a light diffusing material, when the light in the visible light region emitted by the light emitting source 28 is incident on the light diffusing portion 15, the light is emitted. The diffuser 15 diffuses and reflects the light in the visible light region by the light diffusing material, and emits the light in the visible light region from the light diffuser 15 in all directions.

Then, the light transmitted through the globe 17 and radiated to the outside is also radiated from the optical axis direction a to the side opposite to the optical axis direction a. That is, with the optical axis direction a as 0 °, the light emitted from the light diffusing unit 15 is also emitted in a range including 90 ° or more. Therefore, the range in which light can be transmitted through the glove 17, that is, the range in which light can be radiated is the range of the angle α from 0 ° to the one end side of the housing 11, which is 0 to about 150 ° in the present embodiment. It will be a wide range. Therefore, the light distribution of the lighting device 10 is suitable for the chandelier fixture shown in FIG.

Further, by radiating light from the light diffusing portion 15 in the glove 17 in all directions, the light diffusing portion 15 is visually recognized as a floating light source in which the light emitting portion is suspended in the glove 17. This is similarly visible from any direction within the range in which the light diffuser 15 can be seen through the glove 17.

When the light source 28 emits light in the ultraviolet region, the light in the ultraviolet region is not visible between the light source 28 and the light diffusing part 15, so that the light diffusing part 15 seems to have the light emitting part floating in the globe 17. It becomes easy to see as a floating light source.

As described above, according to the lighting device 10 of the present embodiment, the light distribution to the opposite side with respect to the optical axis direction a of the optical system 13 can be secured, and the light diffusing portion 15 is suspended in the globe 17. It is possible to obtain the effect of shining as if it were a floating light source.

Further, by using the wire rod 43 for arranging the light diffusing portion 15 in the glove 17, the support structure of the light diffusing portion 15 is inconspicuous and the appearance can be improved.

Further, since the optical system 13 has a primary lens 31 provided in the light emitting source 28 and a secondary lens 32 that collects the light transmitted through the primary lens 31 in the optical axis direction a, the primary lens 31 The light emitted by the light emitting source 28 can be taken in without leakage and incident on the secondary lens 32 that collects the light, and the efficiency can be improved.

Further, if the light diffusing portion 15 has a three-dimensional shape, the effect of the floating light source can be further enhanced.

Further, since the light diffusing unit 15 includes at least one of a light emitter that incidents the light focused by the optical system 13 and emits secondary light, and a light diffusing material that diffuses the light focused by the optical system 13. , For example, it can be combined with a light emitting source 28 that emits light of an arbitrary wavelength such as an ultraviolet region or a visible light region.

The lighting device does not have to include a power supply unit. In this case, the power supply unit may be arranged on the appliance side or the like so as to supply the lighting power supply to the power supply device.

Further, the lighting device is not limited to a light bulb-shaped lamp, and a lighting device incorporating the lighting device may be used.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

10 Lighting equipment
11 housing
13 Optical system
15 Light diffuser
17 Gloves
19 Power supply
28 Source of light
31 Primary lens
32 Secondary lens
43 Wire rod a Optical axis direction

Claims (4)

With a light emitting source that emits light of ultraviolet wavelength;
With an optical system that collects light of the ultraviolet wavelength emitted by the light emitting source in the optical axis direction;
It is disposed at a position opposed to the optical axis of the optical system, having a phosphor which emits visible light in all directions are excited by the incidence of light in the ultraviolet wavelength from the light source is condensed by the optical system With the light diffuser;
A glove that has translucency, covers the light diffusing portion, and transmits visible light radiated from the light diffusing portion in a range including 90 ° or more from the optical axis direction of the optical system;
With a wire rod that holds the light diffusing portion in the glove at a position facing the optical axis direction of the optical system;
A lighting device characterized by comprising . The optical system includes a primary lens provided in the light-emitting source, according to claim 1 Symbol, characterized in that it comprises a secondary lens for focusing the light in the ultraviolet wavelength transmitted through the primary lens in the optical axis direction Lighting equipment on board. The lighting device according to claim 1 or 2 , wherein the light diffusing portion has a three-dimensional shape . A housing provided with the light emitting source, the optical system, the light diffusing portion , the glove, and the wire rod on one end side;
With the power feeding unit provided on the other end side of the housing;
The lighting device according to any one of claims 1 to 3 , wherein the lighting device is provided with.

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