JP6521226B2 - Lamp device - Google Patents

Description

  Embodiments of the present invention relate to a lamp device using a light guide column.

  Traditionally, there are incandescent clear bulbs that use transparent glass gloves and direct view of the filament. At the time of lighting of this incandescent clear light bulb, a strong feeling of light is obtained by the strong light coming out of the filament that is seen directly through the globe, so that a glittering effect can be obtained and an effect of illumination can be obtained.

  In addition, there is a lamp device that uses a light emitting element as a light source, uses a transparent globe, and can be replaced by an incandescent clear bulb. In this lamp device, light from the light emitting element is emitted into the glove by the lens, or a light emitting module provided with a plurality of light emitting elements is disposed in the inner space of the glove.

  However, with a lamp apparatus using a transparent glove, it has been difficult to reproduce the glittering feeling that the incandescent clear bulb is lit. Therefore, there is a problem in the adaptability of the lamp device to a lighting device such as a chandelier or a lighting device for a store, for which an incandescent clear light bulb is suitable for providing a glittering feeling.

U.S. Patent No. 6,803,607

  The problem to be solved by the present invention is to provide a lamp device capable of reproducing a glittering feeling as if an incandescent clear light bulb is lit, and enhancing the adaptability to a lighting device.

The lamp device of the embodiment includes a housing, a light emitting unit, a transparent globe, a light guide, a cover, and a power feeding unit. The light emitting unit is provided on one end side of the housing. The globe is provided on one end side of the housing to cover the light emitting unit. The light guide has a light guide post which is disposed such that one end thereof projects into the globe and the other end faces the light emitting portion. Shirubekohashira, along with a light emitting unit for emitting a light guided to the light guide in the pillar to the outside of the light guide post at one end, larger in diameter at the other end than the diameter of the one end side and the side Shirubekohashira Inclined to the central axis of The cover covers the light emitting portion and the other end side of the light guide pillar so that the light guide pillar is exposed in the globe . The power feeding unit is provided on the other end side of the housing.

  According to the present invention, it is possible to reproduce a glittering feeling as if an incandescent clear bulb is lit, and it can be expected to improve the adaptability to a lighting device.

It is a sectional view of a lamp device showing a 1st embodiment. It is a perspective view of the disassembly state of a lamp unit same as the above. It is a perspective view of a lamp unit same as the above. It is sectional drawing of the light emission part and light guide of a lamp apparatus same as the above. The light guide state by the light guide column of the light guide of the same lamp device is shown, (a) is an explanatory view of the light guide state when the side surface of the light guide column is inclined to the central axis of the light guide column, (b) is a light guide It is explanatory drawing of the light guide state in case the side of an optical column is parallel to the central axis of a light guide pillar. It is sectional drawing of the lamp apparatus which shows 2nd Embodiment.

  Hereinafter, the first embodiment will be described with reference to FIGS. 1 to 5.

  1 to 3 show a lamp device 10 as a light emitting device. The lamp device 10 is a bulb-shaped lamp that can be used by being attached to a socket for a general lighting incandescent lamp.

  The lamp device 10 includes a housing 11. The light emitting module 12, the light guide 13, the cover 14, and the globe 15 are disposed at one end of the housing 11, and the case 16, the power supply unit 17, and the power feeding unit 18 are disposed at the other end of the housing 11. Is arranged. The lamp device 10 has an imaginary central axis (lamp axis) z extending from the globe 15 to the feeding portion 18, the globe 15 side of the central axis z is referred to as one end side, and the feeding portion 18 side as the other end. .

  The housing 11 is formed of a metal material. For example, the housing 11 is made of aluminum die casting. The housing 11 includes a cylindrical outer peripheral portion 21 and a mounting portion 22 formed on one end side of the outer peripheral portion 21. The other end side of the housing 11 is hollow. The outer peripheral portion 21 is formed in a cylindrical shape having a large diameter on one end side and a small diameter on the other end side, and a diameter decreasing from one end side to the other end side.

  The surface on one end side of the mounting portion 22 is configured as a flat mounting surface to which the light emitting module 12 is attached. The mounting portion 22 includes a plurality of mounting holes 23 for screwing the light emitting module 12, a plurality of mounting holes 24 for screwing the case 16, and a wire for electrically connecting the light emitting module 12 and the power supply unit 17. Wiring holes 25 for passing through are respectively formed. Further, on the surface on one end side of the mounting portion 22, a pair of recessed portions 26 are formed at symmetrical positions with respect to the center of the mounting portion 22. Further, a groove-shaped relief portion 27 is formed around the mounting portion 22.

  Between the outer peripheral portion 21 and the mounting portion 22, a mounting groove 28 for inserting and attaching the glove 15 from one end side of the housing 11 is formed.

  In the present embodiment, a COB (Chip On Board) module is used as the light emitting module 12. As shown in FIG. 4, the light emitting module 12 includes a substrate 30, a plurality of light emitting elements 31 mounted on the substrate 30, a frame portion 32 surrounding the periphery of the light emitting elements 31, and the light emitting elements 31 in the frame portion 32. A phosphor layer 33 filled to cover (seal) is provided. The surface of the phosphor layer 33 is configured as a light emitting unit 34.

  The substrate 30 has a flat plate shape, and a wiring pattern for electrically connecting the plurality of light emitting elements 31 is formed on the surface on one end side. The substrate 30 is formed of an insulating material or a metal material. When the substrate 30 is a metal material, an insulating film is formed on the surface of the substrate 30, and a wiring pattern is formed on the insulating film. As shown in FIG. 2, the light emitting unit 34 is disposed at the center of the surface on one end side of the substrate 30, and the connector 35 is disposed at the periphery of the surface on one end side of the substrate 30. The connector 35 is electrically connected to the wiring pattern.

  Mounting holes 36 and a plurality of mounting grooves 37 for screwing and fixing to the mounting holes 23 of the housing 11 and wiring for electrically connecting the power supply unit 17 with the connector 35 of the light emitting module 12 pass through the substrate 30. Wiring grooves 38 are formed respectively. Furthermore, a pair of insertion holes 39 are formed in the substrate 30 at symmetrical positions with the light emitting portion 34 as the center. The pair of insertion holes 39 correspond to the positions of the pair of depressions 26 of the housing 11. The substrate 30 is tightened and fixed to the housing 11 by a plurality of screws and thermally coupled to the housing 11.

  An LED is used as the light emitting element 31. A blue light emitting LED is used as the LED.

  The frame portion 32 is formed in an annular shape by an insulating material.

  The phosphor layer 33 contains a phosphor excited by the light of the light emitting element 31 in a transparent resin. For example, it contains a yellow phosphor that is excited by the blue light of a blue light emitting LED to emit yellow light. The light emitting surface 34 a of the light emitting unit 34, which is the surface of the phosphor layer 33, emits white light.

  The light emitting unit 34 may be configured by an SMD (Surface Mount Device) package using an LED, or an organic EL other than the LED, for example.

  Further, as shown in FIGS. 1 to 3, the light guide 13 is formed of a transparent resin or glass. In the case of a resin, for example, an acrylic resin is used. The light guide 13 includes a light guide post 42 and a fixing portion 43 for attaching the light guide post 42 to the housing 11.

  The light guiding column 42 is formed in a cylindrical shape, one end of the light guiding column 42 is disposed at the center of the largest outer diameter portion D of the globe 15, and the end face of the other end of the light guiding column 42 is disposed opposite to the light emitting portion 34.

  The light guiding column 42 is cylindrical, but the diameter on the other end side is larger than the diameter on the one end side, and the side surface of the light guiding column 42 is continuously inclined with respect to the central axis z. That is, the light guide column 42 is formed in a conical shape that tapers from the proximal end side fixed to the housing 11 toward the distal end side disposed in the globe 15. The inclination angle of the side surface of the light guide column 42 with respect to the central axis z is about 1 to 2 °.

  The diameter d of the light guiding column 42 is 2 to 9 mm, and one end of the light guiding column 42 is disposed in the range of 5 mm from the center to the one end side from the center in the height direction of the globe 15 to 10 mm from the other end. Within the range, it is disposed at the center of the largest outer diameter portion D of the glove 15.

  A recess 44 is formed in the central region of the end face on one end side of the light guide column 42, and a reflective film 45 is formed on the inner surface of the recess 44. The concave portion 44 is deepest at the center from the end surface on one end side of the light guide column 42, and a section from the deepest point to the end surface on one end side of the light guide column 42 is formed as a curved surface or an inclined surface. The reflecting film 45 may be either a total reflecting film that totally reflects light or a semi-transmissive reflecting film that transmits a part of light and reflects a part. In some cases, the reflective film 45 may be omitted. In the present embodiment, for example, an aluminum deposition film, which is a total reflection film, is used as the reflection film 45. The reflective film 45 is not formed on the end face on one end side of the light guide pillar 42 except for the concave portion 44. Therefore, the light guided to this end face can be transmitted to one end side of the light guiding column 42, and the light distribution characteristic can be improved.

  The end face on the other end side of the light guide column 42 is configured as an incident surface 46 on which the light emitted from the light emitting unit 34 enters the light guide column 42. The light entering the light guide column 42 from the incident surface 46 is guided in the light guide column 42 toward one end side of the light guide column 42. One end side of the light guiding column 42 is configured as a light emitting unit 47 that radiates the light guided in the light guiding column 42 to the outside of the light guiding column 42. In the light emitting portion 47, part of the light guided in the light guiding column 42 is reflected by the reflecting film 45 and emitted from the peripheral surface of the light guiding column 42 or the end face of one end of the light guiding column 42 A part of light guided in the inside of the light source 42 is directly emitted from a tip end surface which is an end surface on one end side of the light guiding post 42. Therefore, the light emitting portion 47 is formed on one end side of the light guiding post 42 in which the recess 44 and the reflective film 45 are provided, and from the light emitting portion 47 in the lateral direction intersecting the axial direction of the light guiding post 42 The light is emitted in a wide direction including the tip direction and the oblique direction from the light guide column 42 toward the housing 11 side. The light emitting portion 47 is disposed at the center of the largest outer diameter portion D of the globe 15. And, with the light emitted from the light emitting portion 47, it is possible to reproduce a glittering feeling as if the incandescent clear bulb is lit.

  The sense of glitter is used in the sense that "the light looks beautiful and shining."

  The fixing portion 43 is provided to project around the other end of the light guide post 42. The fixed portion 43 is provided with a protrusion 48 which is inserted through the insertion hole 39 of the substrate 30 and positioned. The tip of the projection 48 enters the recess 26 of the housing 11 and is configured not to contact the housing 11. Therefore, the light guide 13 and the substrate 30 are reliably positioned, whereby the light emitting portion 34 and the incident surface 46 of the light guide column 42 are positioned. The fixing portion 43 of the light guide 13 is sandwiched and fixed between the substrate 30 and the cover 14.

  In the fixed portion 43, a housing portion 49 for housing the light emitting portion 34 opposed to the incident surface 46 is formed. A reflective surface 50 is provided on the peripheral wall surface of the housing 49 so as to face the periphery of the light emitting surface 34 a of the light emitting unit 34. The diameter of the reflective surface 50 is larger than the diameter of the light emitting portion 34 and smaller than or equal to the diameter of the incident surface 46 which is the other end of the light guide column 42. For example, an aluminum vapor deposition film is formed on the reflective surface 50.

  Moreover, the cover 14 is formed of the resin material which has insulation. The cover 14 is formed in the shape of a curved surface whose center protrudes to one end side, and covers one end side of the housing 11 and the other end side of the light emitting module 12 and the light guide pillar 42. In the center of the cover 14, an insertion hole 55 through which the light guide column 42 is inserted is formed. A plurality of claws 56 hooked to the surface of the other end face of the substrate 30 are provided on the periphery of the cover 14. When the claws 56 are hooked on the surface on the other end side of the substrate 30, the cover 14 is fixed to the substrate 30 with the fixing portion 43 of the light guide 13 sandwiched between the substrate 30 and the cover 14. The claws 56 are disposed in the relief 27 of the housing 11.

  The globe 15 is formed of a transparent material having a light transmittance of 95% or more. Glass and resin are used as a transparent material. The globe 15 is hollow and has a spherical portion 60 formed at one end, a reduced diameter portion 61 whose diameter decreases from one end to the other, and the other end is open. On the other end side of the glove 15 is formed an opening edge 62 which is inserted into the attachment groove 28 of the housing 11 and adhesively fixed, for example, by a silicone adhesive or the like. The light emitting portion 47 of the light guide pillar 42 is disposed at the center of the largest outer diameter portion D of the spherical portion 60 of the globe 15.

  Further, the case 16 is formed in a cylindrical shape by a resin material having an insulating property. One end of the case 16 is inserted into the cavity of the housing 11, and a screw passing through the attachment hole 24 of the housing 11 is screwed to one end of the case 16, thereby fixing the case 16 to the housing 11. The power supply unit 18 is attached to the other end of the case 16. A pair of substrate holding portions 65 is formed along the central axis z at two opposing locations inside the case 16.

  Further, the power supply unit 17 converts AC power input from the power supply unit 18 into predetermined DC power and supplies the DC power to the light emitting element 31 of the light emitting module 12. The power supply unit 17 includes a circuit board 68 and a plurality of electronic components 69 mounted on the circuit board 68. The circuit board 68 is inserted between the pair of board holding portions 65 from one end side of the case 11 and is held by the case 11. The pair of AC power input portions of the power supply portion 17 is electrically connected to the power feeding portion 18 by wiring, and the pair of DC power output portions of the power supply portion 17 is electrically connected to the connector 35 of the light emitting module 12 by wiring. It is connected.

  Further, as the feeding portion 18, for example, a cap that can be connected to a socket for general illumination incandescent bulbs such as E26 and E17 is used. The feed unit 18 is not limited to the base and may be a pair of pins depending on the type of lamp.

  In the lamp device 10, the ratio of the area of the globe 15 to the total lamp length in the direction along the central axis z is 55% or more, preferably 60% or more.

  And the effect | action of this embodiment is demonstrated.

  The lamp device 10 is used by connecting the power supply unit 18 to a socket for a general lighting incandescent lamp of the lighting device. When AC power is supplied to the lamp device 10 through the socket, the power supply unit 17 converts the AC power into predetermined DC power and supplies it to the light emitting element 31. Thereby, the light emitting element 31 emits light, and light is emitted from the light emitting unit 34.

  The light emitted from the light emitting unit 34 is incident on the light guide post 42 from the incident surface 46 and guided in the light guide post 42 toward the light emitting unit 47. The light guided to the light emitting portion 47 is reflected by the reflection film 45 of the recess 44 and is emitted from the peripheral surface of the light guiding post 42 or the end face on one end side of the light guiding post 42 It emits directly from the end face which is the end face. Therefore, light is emitted from the light emitting portion 47 in a wide direction including the lateral direction intersecting the axial direction of the light guide column 42, the tip direction of the light guide column 42, and the oblique direction from the light guide column 42 to the housing 11 side. It is emitted. The light emitted from the light emitting unit 47 is transmitted through the globe 15 and irradiated to the illumination space.

  Then, the lamp device 10 can reproduce a glittering feeling as if the incandescent clear light bulb is lit by emitting light from the light emitting portion 47 of the light guide column 42.

  By the way, as shown to FIG. 5B, when the diameter of the light guide pillar 42 is the same diameter in an axial direction, the side surface of the light guide pillar 42 and air among the lights which injected into the light guide pillar 42 from the entrance plane 46 The light having an incident angle θ incident on the interface is larger than the critical angle at which the light is totally reflected, the light is totally reflected at the interface, and the total reflection is repeated a plurality of times to reach the light emitting portion 47. However, each time the light repeats total reflection, the reflection angle varies, and the incident angle θ of the light incident on the interface between the side surface of the light guide column 42 and the air becomes smaller than the critical angle for total reflection, and the light is totally reflected. It will radiate | emit from the side surface of the light guide pillar 42 in the middle position of the longitudinal direction of the light guide pillar 42, without. As a result, the light emitted from the middle of the light guide column 42 other than the light emitting portion 47 in the longitudinal direction increases, and the light emitted from the light emitting portion 47 decreases, and the glittering feeling is impaired.

  As shown in FIG. 5A, in the present embodiment, in the light guiding column 42, the diameter of the incident surface 46 is larger than the diameter of the light emitting portion 47, and the side surface of the light guiding column 42 is inclined with respect to the central axis z. That is, the light guide column 42 is formed in a conical shape that tapers from the base end side facing the light emitting portion 34 toward the tip end side provided with the light emitting portion 47. Therefore, among the light incident on the light guiding column 42 from the incident surface 46, the light having an incident angle θ incident on the interface between the side surface of the light guiding column 42 and air larger than the critical angle totally reflected is totally reflected on the interface The incident angle θ when entering the interface between the side surface of the light guide column 42 and air is likely to be larger than the critical angle at which total reflection is repeated, and the axial direction of the light guide column 42 is repeated even if total reflection is repeated multiple times. The light emitting portion 47 can be easily reached without being emitted from the side surface of the light guide column 42 at the intermediate position. Thereby, the radiation of the light from the light emitting portion 47 of the light guiding column 42 is increased, and it is possible to reproduce a glittering feeling as if the incandescent clear bulb is on.

  The critical angle is 42.2 ° when the light guide column 42 is glass (refractive index n = 1.49).

  Moreover, since the light guiding column 42 has a small diameter of the light emitting portion 47, the glittering feeling is further improved, and since the diameter of the incident surface 46 is large, the light emitted from the light emitting portion 34 is incident on the incident surface 46. As a result, the efficiency can be improved, and the area of the light emitting unit 34 can be increased, and the output of the light emitting module 12 can be increased.

  The inclination angle of the side surface of the light guide column 42 with respect to the central axis z is preferably in the range of 1 to 2 °. If this range, the light emission from the side surface of the light guide column 42 other than the light emitting portion 47 can be reduced. You can reproduce the feeling.

  In addition, since the light emitting portion 47 of the light guiding column 42 is disposed at the center of the largest outer diameter portion D of the globe 15, the light emitted in the radiation direction from the light emitting portion 47 vertically enters the globe 15. Since it is easy to transmit the globe 15 and unnecessary reflection of light on the inner surface of the globe 15 is suppressed, the glittering feeling can be improved and the light extraction efficiency to the outside of the globe 15 can be improved.

  Furthermore, it is preferable that the light emitting portion 47 of the light guiding column 42 be disposed within a range of 5 mm from the center in the height direction of the globe 15 to 10 mm from the other end.

  The diameter d of the light guide column 42 is preferably in the range of 2 to 9 mm. When the diameter d of the light guiding column 42 is smaller than 2 mm, the light of the light emitting unit 34 is less likely to be incident on the light guiding column 42 and the efficiency decreases, and when the diameter d of the light guiding column 42 is larger than 9 mm, the light emitting unit 47 Becomes large and the glittering feeling decreases.

  When the lamp unit 10 is configured to approximate the general lighting incandescent bulb, the length of the light guiding column 42 necessary for arranging the light emitting portion 47 at the center of the largest outer diameter portion D of the globe 15 is 35 to 35 It is in the range of 45 mm.

  Further, as shown in FIG. 4, the size of the incident surface 46 of the light guiding column 42 is larger than the size of the light emitting surface 34 a of the light emitting unit 34. Therefore, most of the light emitted from the light emitting unit 34 can be made incident on the light guiding column 42, and the incident loss can be reduced, thereby increasing the light emitted from the light emitting unit 47 and improving the glittering feeling.

  In the fixed portion 43 of the light guide 13, the light emitting portion 34 has a reflecting surface 50 which is larger than the diameter of the light emitting surface 34 a of the light emitting portion 34 and smaller than the diameter of the incident surface 46 which is the other end of the light guiding column 42. It is provided facing the periphery of the light emission surface 34a. Of the light radiated from the light emitting portion 34, light directed to the side between the light emitting portion 34 and the light guiding post 42 is reflected by the reflecting surface 50, and is made incident on the light guiding post 42 to reduce incident loss. Therefore, the light emitted from the light emitting portion 47 can be increased, and the glittering feeling can be improved.

  In addition, since the cover 14 covers the light emitting unit 34 and the other end side of the light guide column 42, the light is prevented from being emitted from the vicinity of the housing 11, and the light is emitted only from the light emitting unit 47. Can improve the glittering feeling.

  Next, FIG. 6 shows a second embodiment. In addition, about the same structure as 1st Embodiment, the same code | symbol is used and description of the structure and an effect is abbreviate | omitted.

  A candle-shaped lamp unit 10 is shown in FIG. The globe 15 is formed in a conical shape that tapers from the housing 11 side to the tip side. The configuration other than the glove 15 is the same as that of the lamp device 10 according to the first embodiment.

  It is preferable that the light emitting portion 47 which is the tip of the light guide column 42 protruding into the globe 15 be disposed in the range of 5 mm from the center in the height direction of the globe 15 to 10 mm from the other end. Within this range, the position of the light emitting portion 47 of the light guide column 42 is equivalent to the light emitting position of the candle bulb, and the light can be lighted like a candle bulb to reproduce a glittering feeling.

  While certain embodiments of the present invention have been described, these embodiments have been presented by way of example only, and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and the gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 lamp device
11 Case
13 light guide
14 cover
15 gloves
18 Power feed
34 light emitting unit
42 light guiding column
43 Fixed part
47 light emitting part
50 reflective surface

Claims (3)

Housing and
A light emitting unit provided on one end side of the housing;
A transparent glove provided on one end side of the housing to cover the light emitting unit;
The light guiding post has one end protruding into the globe and the other end facing the light emitting portion, and the light guiding post guides the light guided in the light guiding post to the one end side. A light guide having a light emitting portion that radiates to the outside of the light column, wherein the diameter of the other end side is larger than the diameter of the one end side, and the side surface is inclined with respect to the central axis of the light guide column;
A cover that covers the light emitting unit and the other end side of the light guiding column such that the light guiding column is exposed in the globe ;
A feeding unit provided on the other end side of the housing;
A lamp device comprising: The diameter of the light guiding column is 2 to 9 mm, and one end of the light guiding column is disposed within a range of 5 mm from the center in the height direction of the globe to 10 mm from the other end. The lamp device according to 1. The light guide is provided on the other end side of the light guide column and fixed to the housing, and the diameter of the light emitting unit is larger than the diameter of the light emitting unit and less than or equal to the diameter of the other end of the light guide column. The lamp device according to claim 1 or 2, further comprising a reflective surface provided on the fixed portion so as to face the periphery.

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