JP5915488B2 - Luminescent bulb and vehicle lamp - Google Patents

Description

  The present invention relates to a light-emitting bulb provided with a semiconductor laser element, and a vehicular lamp provided with the light-emitting bulb.

  Conventionally, for example, an LED bulb using a light emitting diode (LED) used for a vehicle headlamp as a light source is known (see Patent Document 1).

  The LED bulb described in Patent Document 1 is configured to ensure compatibility with existing filament bulbs, and is provided at a cylindrical bulb body made of a material having thermal conductivity and at one end of the bulb body. A plurality of LED light emitting elements such as power LEDs that emit light having directivity from the light emitting surface, a reflecting member that reflects light emitted from the plurality of LED light emitting elements, and the reflecting member are connected to the valve body. A plurality of support columns, a first heat sink provided on the reflecting member, and a second heat sink provided on the other end of the valve body are provided.

  The reflective member is an LED so that the light emission direction when the LED bulb is attached to the socket portion of the headlamp to which the filament bulb can be attached is substantially the same as the light emission direction of the filament bulb. It is formed in a conical shape protruding toward the light emitting surface of the light emitting element. The light emitted from the plurality of LED light emitter elements is reflected by the reflecting surface of the reflecting member and further reflected by the inner surface of the concave reflecting mirror to irradiate the front of the vehicle. The heat generated in the plurality of LED light emitting elements is conducted to the support column and the reflecting member to be radiated from the first heat sink, and is conducted to the valve body to be radiated from the second heat sink.

  The plurality of LED light emitter elements are arranged such that the upward light distribution LED light emitter element and the downward light distribution LED light emitter element are adjacent to each other in the vertical direction when mounted on the headlamp. The LED light emitting element for upward light distribution is emitted at the time of high beam irradiation that illuminates the front of the vehicle in a substantially horizontal direction far away, and the LED light emitting element for downward light distribution is emitted at the time of low beam irradiation that irradiates the lower side than at the time of high beam irradiation. The light emitted from the LED light emitting element for upward light distribution and the light emitted from the LED light emitting element for downward light distribution are reflected by different parts of the reflecting member, further reflected by the reflector of the headlamp, and radiated forward of the vehicle. Is done.

JP 2011-210695A

  Vehicle headlamps are stipulated to emit white light (see “Safety Standards for Road Transport Vehicles”), and in order to comply with this standard, for example, emitted light from an LED emitting blue light A white light emission is obtained by mixing with yellow light emitted from a phosphor excited by the emitted light. In some cases, white light emission may be obtained using three kinds of phosphors that are excited by light emitted from LEDs emitting purple light or ultraviolet light and emit red, blue, and green fluorescence. Such LED bulbs that emit white light are widely used not only for vehicle headlamps but also for indoor lighting, for example.

  When the phosphor used in such an LED bulb is placed in a high temperature state, the characteristics may deteriorate and the fluorescence may weaken. When the characteristics of the phosphor are deteriorated, even if white light is emitted at the beginning of use, the color changes due to long-term use.

  In the LED bulb described in Patent Document 1, a power LED having a large amount of light is used as an LED light emitter element. In such a power LED, a semiconductor light emitting element and a resin or glass containing a phosphor are close to or in contact with each other. Are generally arranged. For this reason, the phosphor is heated by heat generated by the semiconductor light emitting element, and there is a possibility that the characteristics of the phosphor deteriorate. Further, if a high-power LED is simply placed at the tip of a rod-shaped heat sink, the heat dissipation property is insufficient, and the light emission efficiency of the semiconductor light emitting element may be lowered and the lifetime may be shortened.

  Therefore, the present invention includes a semiconductor laser element as a light source, and suppresses deterioration of characteristics of the phosphor excited by light of the semiconductor laser element due to heat and deterioration of the semiconductor laser element due to heat of the semiconductor laser element itself. An object of the present invention is to provide a light emitting bulb and a vehicular lamp that can be used.

  In order to solve the above-described problems, the present invention provides a plurality of selectively energized light sources composed of semiconductor laser elements, a plurality of lenses for narrowing a light distribution angle of light emitted from the plurality of light sources, and the plurality of the light sources. A plurality of reflecting members that reflect the light from the plurality of light sources that has passed through the lens in a direction intersecting the optical axis of the lens, and a plurality of transparent members that emit fluorescence using the light from the plurality of light sources as excitation light. A plurality of optical members; a support portion that supports the plurality of light sources; a base that includes a heat dissipation portion that dissipates heat from the plurality of light sources from the support portion; and the plurality of light sources disposed along the optical axis of the lens. A light-emitting bulb comprising a supporting member that is spaced from the plurality of light sources and is supported by the base.

  The reflecting member includes a holding portion that holds the translucent member, and a reflecting portion in which a reflecting surface that reflects light from the light source is formed on the translucent member that is held by the holding portion. And it is good for the said supporting member to support these translucent members via the said holding | maintenance part of the said reflecting member.

  Further, the reflection member further includes a funnel-like fluorescent reflection portion that expands toward the holding portion between the holding portion and the reflecting portion, and the fluorescent material emitted from the phosphor by the fluorescent reflection portion. May be reflected toward the translucent member.

  The plurality of translucent members include first and second translucent members that emit the fluorescence in directions opposite to each other, and distal ends of the support members rather than the first and second translucent members. It is good to include the 3rd translucent member arrange | positioned at the side.

  Moreover, this invention provides the vehicle lamp provided with the said light-emitting bulb and the concave reflecting mirror to which the said base of the said light-emitting bulb is attached to the back part for the purpose of solving the said subject.

  In order to solve the above-described problems, the present invention includes the light emitting bulb and a concave reflecting mirror to which the base of the light emitting bulb is attached at the back, and the first and third light-transmitting mirrors are provided. And the second translucent member is disposed on an inner surface vertically below the inner portion of the concave reflecting mirror. A vehicular lamp that is opposed and energized to the light source corresponding to the first and second translucent members during high beam irradiation and energized to the light source corresponding to the third translucent member during low beam irradiation. provide.

  According to the light-emitting bulb and the vehicular lamp according to the present invention, it is possible to suppress deterioration of characteristics due to heat of the phosphor excited by light of the semiconductor laser element and deterioration of the semiconductor laser element due to heat of the semiconductor laser element itself. It becomes possible.

It is sectional drawing which shows the structural example of the light-emitting bulb which concerns on embodiment of this invention, and the headlight as a vehicle lamp provided with this light-emitting bulb. It is sectional drawing which shows the structural example of a light emission bulb | ball. 4 is a perspective view showing a first reflecting member 41. FIG. It is a schematic diagram which shows the lighting state of the headlight 1, (a) shows the lighting state at the time of low beam irradiation, (b) shows the lighting state at the time of high beam irradiation, respectively. It is the schematic which shows the halogen bulb | ball used for the conventional headlamp.

[Embodiment]
FIG. 1 is a cross-sectional view showing a configuration example of a light emitting bulb according to an embodiment of the present invention and a headlight as a vehicular lamp provided with the light emitting bulb. The vertical direction in FIG. 1 corresponds to the vertical direction in the vertical direction.

(Headlight structure)
The headlight 1 includes a light emitting bulb 10, a concave reflecting mirror 11, an outer lens 12, and a heat radiating plate 13. The headlight 1 is used as a headlamp of a vehicle, reflects light emitted from the light emitting bulb 10 to the outer lens 12 side by a concave reflecting mirror 11, and irradiates the front of the vehicle.

  The light emitting bulb 10 includes a cylindrical support member 100 and first to third light emitting units 101 to 103 supported by the support member 100. The support member 100 is inserted through the insertion hole 111 formed in the back part 110 of the concave reflecting mirror 11 in the horizontal direction, and the first to third light emitting parts 101 to 103 are inserted into the concave reflecting mirror 11. One end of the light emitting bulb 10 is fixed in contact with the heat radiating plate 13. The heat radiating plate 13 radiates heat by conducting heat of the light emitting bulb 10 to, for example, a vehicle body (not shown).

The first and second light emitting units 101 and 102 have the same horizontal position, the first light emitting unit 101 is below the support member 100, and the second light emitting unit 102 is above the support member 100. Has been placed. First and second light emitting portions 101 and 102, the distance from the back portion 110 of the concave reflector 11 is arranged over a range from _{d 1} of _{d 2 (d 1 <d 2} ).

The third light emitting unit 103 is disposed closer to the distal end side (outer lens 12 side) than the second light emitting unit 102 on the upper side of the support member 100. The third light emitting unit 103, the distance from the back portion 110 of the concave reflector 11 is arranged over a range from _{d 3 d 4 (d 3 <d 4} ).

  The first and second light emitting units 101 and 102 are light emitting units for high beam irradiation, and the third light emitting unit 103 is a light emitting unit for low beam irradiation. The first and second light emitting units 101 and 102 and the third light emitting unit 103 are switched in the light emission state in accordance with a switch operation of the driver of the vehicle.

(Configuration of luminous bulb)
FIG. 2 is a cross-sectional view illustrating a configuration example of the light emitting bulb 10.

  The light emitting bulb 10 includes a support member 100, first to third light sources 21 to 23, and first to third lenses 31 to 31 that narrow light distribution angles of light emitted from the first to third light sources 21 to 23. 33, the first to third reflecting members 41 to 43 that reflect the light that has passed through the first to third lenses 31 to 33, and the first to third light sources 21 to 23 as excitation light. The 1st thru | or 3rd translucent members 51-53 containing the fluorescent substance 5a which emits, and the base 6 to which the supporting member 100 and the 1st thru | or 3rd light sources 21-23 were fixed are provided.

  The first to third light sources 21 to 23 are made of a semiconductor laser element such as a laser diode that emits blue light having a peak wavelength of 430 nm to 470 nm, for example. The first to third light sources 21 to 23 emit blue light toward the first to third lenses 31 to 33.

  The first to third lenses 31 to 33 are convex lenses made of a light-transmitting material such as glass or resin, and the first to third light sources 21 to 23 and the first to third light sources are supported by an unillustrated support. 3 between the reflecting members 41 to 43. In the present embodiment, the focal length is set so that the light that has passed through the first to third lenses 31 to 33 is parallel to the central axis of the support member 100.

  The first to third reflecting members 41 to 43 are made of a metal such as aluminum, for example, and have reflecting portions 411, 421, 431, holding portions 412, 422, 432, and fluorescent reflecting portions 413, 423, 433. doing. The reflection units 411, 421, and 431 intersect the light axes of the first to third light sources 21 to 23 that have passed through the first to third lenses 31 to 33 with the optical axes of the first to third lenses 31 to 33, respectively. Reflect in the direction you want. The holding portions 412, 422, and 432 hold the first to third translucent members 51 to 53. The fluorescence reflection parts 413, 423, and 433 reflect the fluorescence of the phosphor 5a emitted from the translucent members 51 to 53 to the translucent members 51 to 53 side.

  The 1st thru | or 3rd translucent members 51-53 are arrange | positioned by disperse | distributing the fluorescent substance 5a in the base material which has translucency, such as glass and resin. The 1st thru | or 3rd translucent members 51-53 can be obtained by mixing and baking the powdery fluorescent substance 5a, for example in glass powder. As the phosphor 5a, a YAG (yttrium, aluminum, garnet) -based phosphor that emits yellow fluorescence when receiving blue light can be used. In FIG. 2, the size of the phosphor 5a is exaggerated for explanation.

  The base 6 is made of a metal having excellent thermal conductivity such as aluminum, for example, and supports the first to third light sources 21 to 23 and the support 61 to the first to third light sources 21 to 23. 23 has a heat dissipating part 62 that dissipates heat of 23. In the present embodiment, the support portion 61 and the heat radiating portion 62 are integrally formed.

  The first to third light sources 21 to 23 are fixed to the upper surface 61 a of the support portion 61, and the heat of the first to third light sources 21 to 23 is conducted to the support portion 61. The heat conducted to the support portion 61 is radiated to the heat radiating plate 13 through the heat radiating portion 62. In the example shown in FIG. 2, the heat radiating portion 62 and the heat radiating plate 13 are in direct contact, but a heat transfer member having high thermal conductivity may be interposed between the heat radiating portion 62 and the heat radiating plate 13. That is, it is only necessary to be thermally coupled so that heat is transmitted from the heat radiating portion 62 to the heat radiating plate 13.

  Three power supply terminals 631, 632, and 633 protrude from the bottom surface 61b of the support portion 61. The power supply terminal 631 is connected to the p-electrode of the semiconductor laser element in the first and second light sources 21 and 22. The power supply terminal 632 is connected to the p-electrode of the semiconductor laser element in the third light source 23. The power supply terminal 633 is connected to the n electrodes of the semiconductor laser elements in the first to third light sources 21 to 23. Thus, when a positive voltage is supplied to the power supply terminal 631, the first and second light sources 21 and 22 are energized, and when a positive voltage is supplied to the power supply terminal 632, the third light source 23 is energized. . That is, the first to third light sources 21 to 23 are selectively selected, that is, the first and second light sources 21 and 22 or the third light source 23 is selected according to the operation of the user (driver). It can be energized.

  The support member 100 is disposed along the optical axis of the first to third lenses 31 to 33 and separates the first to third light-transmissive members 51 to 53 from the first to third light sources 21 to 23. It is made to support on the base 6. An end portion of the support member 100 on the base 6 side is fitted and fixed to a recess 62 a formed in the heat radiating portion 62. In the support member 100, holding portions 412, 422, and 432 are fitted into openings formed corresponding to the first to third reflecting members 41 to 43, and the first portions are interposed via the holding portions 412, 422, and 432. First to third translucent members 51 to 53 are supported on the base 6.

  The light emitted from the first light source 21 passes through the first lens 31 and is reflected by the reflecting portion 411 of the first reflecting member 41 to the first translucent member 51. Part of the light incident on the first translucent member 51 strikes the phosphor 5a to excite the phosphor 5a and generate yellow fluorescence. Further, another part of the light incident on the first light transmissive member 51 passes through the first light transmissive member 51 without hitting the phosphor 5a.

  Similarly, the light emitted from the second light source 22 passes through the second lens 32 and is reflected by the second translucent member 52 by the reflecting portion 421 of the second reflecting member 42. The light emitted from the third light source 23 passes through the third lens 33 and is reflected by the second light transmissive member 53 by the reflecting portion 431 of the third reflecting member 43.

  The 1st thru | or 3rd translucent members 51-53 radiate | emit the yellow light by which the wavelength conversion was carried out by the fluorescent substance 5a, and the blue light which was not wavelength-converted by the fluorescent substance 5a. Since yellow and blue are complementary to each other, white light can be obtained by mixing yellow light and blue light. The first translucent member 51 is the first light emitting unit 101, the second translucent member 52 is the second light emitting unit 102, and the third translucent member 53 is the third light emitting unit 103. Each function. The first translucent member 51 and the second translucent member 52 emit light in directions opposite to each other. The third light transmissive member 53 is disposed on the distal end side (the side opposite to the base 6) of the support member 100 with respect to the first light transmissive member 51 and the second light transmissive member 52.

  FIG. 3 is a perspective view showing the first reflecting member 41. The second reflecting member 42 has the same shape and the same size as the first reflecting member 41, and the third reflecting member 43 has the same shape as the first reflecting member 41 and the first reflecting member 41. It is formed larger than 41.

  The reflection part 411 is curved in an arc shape, and is formed as a reflection surface 411a whose inner surface is curved. In the present embodiment, the reflecting surface 411a is formed as a spherical concave portion, that is, a concave mirror. The reflection part 411 reflects the light of the first light source 21 to the first translucent member 51 held by the holding part 412 by the reflection surface 411a. The light reflected by the reflecting surface 411a is diffused according to the shape of the reflecting surface 411a and is incident on a wide range of the first translucent member 51 as shown in FIG. The holding unit 412 has a circular opening 412a, and emits white light from the opening 412a.

  The fluorescent reflecting part 413 is located between the holding part 412 and the reflecting part 411 and is formed in a funnel shape that expands toward the holding part 412. The inner surface of the fluorescent reflecting part 413 is formed as a mirror-reflected fluorescent reflecting surface 413a. The fluorescent reflection surface 413a reflects the fluorescence of the phosphor 5a emitted from the first light transmissive member 51 to the fluorescent reflection portion 413 side to the first light transmissive member 51 side.

  4A and 4B are schematic diagrams showing the lighting state of the headlight 1. FIG. 4A shows the lighting state at the time of low beam irradiation, and FIG. 4B shows the lighting state at the time of high beam irradiation.

  During low beam irradiation, the third light source 23 is energized from a power supply (not shown), and white light is emitted from the third light emitting unit 103. The light emitted from the third light emitting unit 103 is reflected by the low beam reflecting surface 11a of the concave reflecting mirror 11 and irradiates below the horizontal direction.

  During high beam irradiation, the first and second light sources 21 and 22 are energized from a power supply (not shown), and white light is emitted from the first and second light emitting units 101 and 102. The light radiated from the first and second light emitting units 101 and 102 is reflected by the high beam reflecting surfaces 11b and 11c of the concave reflecting mirror 11, and is irradiated in a substantially horizontal direction.

  The low-beam reflecting surface 11 a and the high-beam reflecting surface 11 b are formed on the inner surface of the concave reflecting mirror 11 on the upper side in the vertical direction from the back part 110. The third light transmissive member 53 faces the low beam reflecting surface 11a. The second light transmissive member 52 faces the high beam reflecting surface 11b. The high beam reflecting surface 11b is formed closer to the back 110 side of the concave reflecting mirror 11 than the low beam reflecting surface 11a.

  The high beam reflecting surface 11 c is formed on the inner surface of the concave reflecting mirror 11 on the lower side in the vertical direction than the back portion 110. The first light transmissive member 51 faces the high beam reflecting surface 11c.

  FIG. 5 is a schematic diagram showing a halogen bulb (H-4 bulb) 7 widely used in conventional headlamps.

  The halogen bulb 7 includes a base 71, a hollow cylindrical glass shell 72, a shade (light-shielding portion) 73 provided on the top of the glass shell 72, a first filament 74 as a high beam light emitting portion, and a low beam light emission. A second filament 75, a reflector 76, a stem 77, and three power terminals 78 (only two are shown in FIG. 5) are provided. The first filament 74 and the second filament 75 are made of a single coil or a double coil, and are arranged linearly along the central axis of the glass shell 72.

In the light emitting bulb 10, the first and second light emitting portions 101 and 102 are arranged in the vicinity of the portion where the first filament 74 is located when the halogen bulb 7 is attached to the back portion 110 of the concave reflecting mirror 11. It is configured. That is, when fitted with a halogen bulb 7 to the concave reflector 11, the horizontal distance from the back portion 110 of the concave reflector 11 from d ₁ of d ₂ ranges (see FIG. 1) of the first filament 74 At least a portion is arranged.

The light emitting bulb 10 is configured such that the third light emitting portion 103 is disposed in the vicinity of the portion where the second filament 75 is located when the halogen bulb 7 is attached to the back portion 110 of the concave reflecting mirror 11. Yes. That is, when the halogen bulb 7 is attached to the concave reflecting mirror 11, the horizontal distance from the back part 110 of the concave reflecting mirror 11 is within the range of d ₃ to d ₄ (see FIG. 1). At least a portion is arranged.

  Since the light emitting bulb 10 is configured as described above, an existing configuration designed on the assumption that the halogen bulb 7 is applied can be used as the concave reflecting mirror 11.

(Operation and effect of the first embodiment)
According to the present embodiment, the following operations and effects can be obtained.

(1) Since the 1st thru | or 3rd translucent members 51-53 are spaced apart and supported from the 1st thru | or 3rd light sources 21-23 by the supporting member 100, the heat | fever which generate | occur | produced with the light sources 21-23 Is difficult to be transmitted to the first to third translucent members 51 to 53. Thereby, the temperature rise of the 1st thru | or 3rd translucent members 51-53 is suppressed, and characteristic deterioration (decrease in conversion efficiency) by the heat | fever in the fluorescent substance 5a is suppressed. Moreover, the 1st thru | or 3rd translucent member 51-53 and the base 6 are spaced apart, and the 1st thru | or 3rd translucent member 51-53 is set in the appropriate position (in the concave reflective mirror 11 ( 1st thru | or 3rd light sources 21-23 can be arrange | positioned in the position close | similar to the heat sink 13, arrange | positioning in the position corresponding to the 1st filament 74 and the 2nd filament 75 when the halogen bulb 7 is attached. The heat dissipation by the base 6 can be performed efficiently.

(2) The first to third reflecting members 41 to 43 reflect the light in the direction along the support member 100 and direct it toward the first to third translucent members 51 to 53 side. The third translucent members 51 to 53 emit light in a direction intersecting with the central axis of the support member 100. Thereby, the light of the 1st thru | or 3rd light emission parts 101-103 can be appropriately applied to the concave reflective mirror 11, and the vehicle front can be irradiated by the light distribution according to the shape of the reflective surfaces 11a-11c. .

(3) Since the 1st thru | or 3rd reflection members 41-43 have the funnel-shaped fluorescence reflection part 413,423,433, the inside of the 1st thru | or 3rd translucent members 51-53 It is possible to reflect the fluorescent light radiated (on the center side of the support member 100) and to go outward. Thereby, the light extraction efficiency is improved.

(4) The 1st thru | or 3rd translucent members 51-53 respond | correspond to the site | part in which the 1st filament 74 and the 2nd filament 75 are located, when the halogen bulb 7 is attached to the back part 110 of the concave reflecting mirror 11. Therefore, it is possible to use an existing configuration designed on the assumption that the halogen bulb 7 is applied as the concave reflecting mirror 11.

(5) Since the reflecting portions 411, 421, and 431 are formed in an arcuate shape, the light reflected by the reflecting portions 411, 421, and 431 is diffused and the first to third translucent members 51 are diffused. Incident on .about.53. Thereby, a part of the phosphors 5a in the first to third translucent members 51 to 53 is not excited intensively, but a wide range of phosphors 5a is excited. It is possible to further suppress the occurrence of a temperature quenching phenomenon in which the fluorescence of the light becomes weak.

  While the embodiments of the present invention have been described above, the embodiments described above do not limit the invention according to the claims. In addition, it should be noted that not all the combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

  Further, the present invention can be appropriately modified and implemented without departing from the spirit of the present invention. For example, in the above embodiment, the first to third light sources 21 to 23 are laser diodes that emit blue light, but may be laser diodes that emit purple light or ultraviolet light. In this case, white light emission is obtained by using three kinds of phosphors that are excited by light emitted from a laser diode that emits purple light or ultraviolet light and emits red, blue, and green fluorescence.

  In the above embodiment, a plurality of lenses (first to third lenses 31 to 33) are provided to narrow the light distribution angle of light emitted from a plurality of light sources. May be realized.

  Further, in the above embodiment, the case where the light emitting bulb 10 includes the first to third light emitting units 101 to 103 has been described. However, the light emitting bulb 10 further includes a fourth light emitting unit as a fog lamp that emits yellow light. May be. In this case, yellow light can be emitted by increasing the content of the phosphor 5a of the translucent member in the fourth light emitting unit. Further, for example, the first light emitting unit 101 can be used as a small lamp (vehicle width lamp) by controlling the energization current to the first light source 21 by PWM (Pulse Width Modulation) and reducing the illuminance thereof. is there.

  Moreover, although the case where the light emission bulb | ball 10 was applied to the headlamp 1 of a vehicle was demonstrated in the said embodiment, not only this but the light emission bulb | ball 10 can also be used for indoor illumination, for example. That is, there is no particular limitation on the application of the light emitting bulb 10.

DESCRIPTION OF SYMBOLS 1 ... Headlight (vehicle lamp), 5a ... Phosphor, 6 ... Base, 7 ... Halogen bulb, 10 ... Luminescent bulb, 11 ... Concave mirror, 11a ... Low beam reflective surface, 11b, 11c ... High beam reflective Surface, 12 ... outer lens, 13 ... heat sink, 21-23 ... first to third light sources, 31-33 ... first to third lenses, 41-43 ... first to third reflecting members, 51- 53 ... 1st thru | or 3rd translucent member, 61 ... Supporting part, 61a ... Upper surface, 61b ... Bottom surface, 62 ... Radiation part, 62a ... Recessed part, 71 ... Base, 72 ... Glass shell, 74 ... 1st filament, 75 ... 2nd filament, 76 ... Reflector plate, 77 ... Stem, 78 ... Power supply terminal, 100 ... Support member, 101-103 ... 1st thru | or 3rd light emission part, 110 ... Back part, 111 ... Insertion hole, 411 421,431 ... reflecting part, 411a Reflecting surfaces, 412, 422, 432 ... holding unit, 412a ... opening, 413,423,433 ... fluorescence reflection portion, 413a ... fluorescence reflection surface, 631, 632, 633 ... power source terminal

Claims (6)

A plurality of selectively energized light sources composed of semiconductor laser elements;
A lens for narrowing a light distribution angle of light emitted from the plurality of light sources;
A plurality of reflecting members that reflect light from the plurality of light sources that has passed through the lens in a direction that intersects the optical axis of the lens;
A plurality of translucent members including a phosphor that emits fluorescence using light from the plurality of light sources as excitation light;
A base having a support part for supporting the plurality of light sources, and a heat dissipation part for radiating heat of the plurality of light sources from the support part;
A support member disposed along the optical axis of the lens, and supporting the plurality of translucent members from the plurality of light sources and supporting the base .
The support member is cylindrical and emits light obtained from the fluorescence from the side to the outside,
Luminescent bulb. A plurality of selectively energized light sources composed of semiconductor laser elements;
A lens for narrowing a light distribution angle of light emitted from the plurality of light sources;
A plurality of reflecting members that reflect light from the plurality of light sources that has passed through the lens in a direction that intersects the optical axis of the lens;
A plurality of translucent members including a phosphor that emits fluorescence using light from the plurality of light sources as excitation light;
A base having a support part for supporting the plurality of light sources, and a heat dissipation part for radiating heat of the plurality of light sources from the support part;
A support member disposed along the optical axis of the lens, and supporting the plurality of translucent members from the plurality of light sources and supporting the base.
The reflective member has a holding part that holds the light transmissive member, and a reflective part in which a reflective surface that reflects light of the light source is formed on the light transmissive member held by the holding part,
The support member supports the plurality of translucent members via the holding portion of the reflection member .
Light emission valve. The reflecting member further includes a funnel-shaped fluorescent reflecting portion that expands toward the holding portion between the holding portion and the reflecting portion, and the fluorescence emitted from the phosphor by the fluorescent reflecting portion is Reflects to the translucent member side,
The light emitting bulb according to claim 2. A plurality of selectively energized light sources composed of semiconductor laser elements;
A lens for narrowing a light distribution angle of light emitted from the plurality of light sources;
A plurality of reflecting members that reflect light from the plurality of light sources that has passed through the lens in a direction that intersects the optical axis of the lens;
A plurality of translucent members including a phosphor that emits fluorescence using light from the plurality of light sources as excitation light;
A base having a support part for supporting the plurality of light sources, and a heat dissipation part for radiating heat of the plurality of light sources from the support part;
A support member disposed along the optical axis of the lens, and supporting the plurality of translucent members from the plurality of light sources and supporting the base.
The plurality of translucent members include first and second translucent members that radiate the fluorescence in opposite directions, and closer to the distal end side of the support member than the first and second translucent members. A third translucent member disposed,
Light emission valve. A plurality of selectively energized light sources composed of semiconductor laser elements, a lens for narrowing a light distribution angle of light emitted from the plurality of light sources, and light of the plurality of light sources that have passed through the lens as an optical axis of the lens A plurality of reflecting members that reflect in the intersecting direction, a plurality of translucent members that include phosphors that emit fluorescence using light from the plurality of light sources as excitation light, a support unit that supports the plurality of light sources, and the support A base having a heat radiating part for radiating heat of the plurality of light sources from the part, and arranged along the optical axis of the lens, and separating the plurality of translucent members from the plurality of light sources to the base A light emitting bulb comprising a supporting member for supporting ;
A vehicular lamp comprising: a concave reflecting mirror to which the base of the light emitting bulb is attached at the back. A light emitting bulb according to claim 4;
A concave reflecting mirror to which the base of the light emitting bulb is attached at the back;
The first and third translucent members are opposed to the inner surface on the upper side in the vertical direction from the inner part of the concave reflecting mirror,
The second translucent member is opposed to the inner surface on the lower side in the vertical direction than the inner part of the concave reflecting mirror,
The light source corresponding to the first and second translucent members is energized during high beam irradiation, and the light source corresponding to the third translucent member is energized during low beam irradiation.
Vehicle lamp.

Images