WO2009131126A1 - Appareil d’eclairage de vehicule - Google Patents

Appareil d’eclairage de vehicule Download PDF

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Publication number
WO2009131126A1
WO2009131126A1 PCT/JP2009/057930 JP2009057930W WO2009131126A1 WO 2009131126 A1 WO2009131126 A1 WO 2009131126A1 JP 2009057930 W JP2009057930 W JP 2009057930W WO 2009131126 A1 WO2009131126 A1 WO 2009131126A1
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WO
WIPO (PCT)
Prior art keywords
phosphor
light
emitting element
light emitting
semiconductor light
Prior art date
Application number
PCT/JP2009/057930
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English (en)
Japanese (ja)
Inventor
祥敬 佐々木
大長　久芳
康章 堤
Original Assignee
株式会社小糸製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社小糸製作所 filed Critical 株式会社小糸製作所
Publication of WO2009131126A1 publication Critical patent/WO2009131126A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/16—Laser light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/147—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device
    • F21S41/148—Light emitting diodes [LED] the main emission direction of the LED being angled to the optical axis of the illuminating device the main emission direction of the LED being perpendicular to the optical axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • F21S41/151—Light emitting diodes [LED] arranged in one or more lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/176—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
    • F21V9/20—Dichroic filters, i.e. devices operating on the principle of wave interference to pass specific ranges of wavelengths while cancelling others
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/323—Optical layout thereof the reflector having two perpendicular cross sections having regular geometrical curves of a distinct nature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/30—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by reflectors
    • F21S41/32—Optical layout thereof
    • F21S41/36—Combinations of two or more separate reflectors
    • F21S41/365—Combinations of two or more separate reflectors successively reflecting the light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to a vehicular lamp using a semiconductor light emitting element as a light source.
  • a vehicular lamp using a semiconductor light emitting element such as an LED (Light Emitting Diode) is known.
  • a vehicular lamp using a semiconductor light emitting element for example, see Patent Document 1.
  • JIS D5500 JIS D5500
  • a method for generating white light using a semiconductor light emitting element a method using a phosphor is often employed. For example, when blue light emitted from a blue LED is irradiated as an excitation light to a phosphor formed of a YAG phosphor, yellow light obtained as fluorescence and blue light transmitted through the phosphor are combined to produce white light. Obtainable.
  • the fluorescence is isotropically radiated from the phosphor. Therefore, in a vehicular lamp using a light source in which a semiconductor light emitting element and a phosphor are combined, it is difficult to collect light from the light source in a direction to be irradiated, and light use efficiency is low.
  • the present invention has been made in view of such circumstances, and an object thereof is to provide a vehicular lamp that can improve the light utilization efficiency.
  • a vehicular lamp includes a semiconductor light emitting element, a phosphor that emits light having a wavelength different from the irradiated light when irradiated with light from the outside, and a semiconductor.
  • a wavelength selection filter that is provided between the light emitting element and the phosphor, transmits light from the semiconductor light emitting element, and reflects light emitted from the phosphor, and light and wavelength selection filter directly emitted from the phosphor
  • an irradiation optical system that irradiates the light reflected by the light in a predetermined irradiation direction.
  • “between” the semiconductor light emitting element and the phosphor means “between” in the optical path of the light irradiated to the phosphor from the semiconductor light emitting element.
  • the light directly emitted from the phosphor includes light that is emitted from the semiconductor light emitting element and then passes through the phosphor as it is, and light that is generated when the phosphor is excited.
  • the light emitted from the semiconductor light emitting element is transmitted to the phosphor through the wavelength selection filter, and light having a wavelength different from that of the irradiated light is emitted isotropically.
  • the light emitted in the direction of the wavelength selection filter is reflected by the wavelength selection filter, travels again toward the phosphor, and is emitted directly from the phosphor by the irradiation optical system. Irradiation is performed in a predetermined irradiation direction. Accordingly, light emitted from the phosphor in the direction of the wavelength selection filter can be taken out, so that the light use efficiency can be improved.
  • the semiconductor light emitting element is provided separately from the wavelength selective filter, and may further include a condensing optical member that condenses light from the semiconductor light emitting element on the wavelength selective filter.
  • a condensing optical member that condenses light from the semiconductor light emitting element on the wavelength selective filter.
  • the light may be condensed on the wavelength selection filter.
  • luminance of a vehicle lamp can be raised by condensing the light which a several semiconductor light-emitting device generate
  • the condensing optical member can use a reflective mirror, a lens, an optical fiber, etc. as the example.
  • the condensing optical member may be an elliptical mirror, in which a semiconductor light emitting element is provided at the first focal point of the elliptical mirror and a wavelength selection filter is provided at the second focal point of the elliptical mirror.
  • a vehicular lamp in which the semiconductor light emitting element and the phosphor are preferably separated.
  • FIG. 1 is a side sectional view showing a vehicular lamp 10 according to an embodiment of the present invention.
  • the vehicular lamp 10 includes a support member 26, an LED module 12, an elliptical mirror 14, a phosphor module 30, and an irradiation optical system 16.
  • the vehicular lamp 10 is a so-called projector-type lamp unit used in a state of being incorporated as a part of the vehicular headlamp, and in the state of being incorporated in the vehicular headlamp, the direction of the optical axis Ax thereof. Is arranged so as to face downward by about 0.5 to 0.6 ° with respect to the vehicle longitudinal direction.
  • the support member 26 is a plate-like member that supports the LED module 12, the elliptical mirror 14, the phosphor module 30, the irradiation optical system 16, and the like.
  • the LED module 12 is fixed to the lower surface of the support member 26 on the rear side. In this Embodiment, the LED module 12 is arrange
  • the LED module 12 includes a semiconductor light emitting element 32, a substrate 34, and a sealing member 36.
  • the semiconductor light emitting element 32 is provided apart from the phosphor module 30.
  • the semiconductor light emitting element 32 is fixed on a substrate 34 on which a wiring pattern is formed.
  • the semiconductor light emitting element 32 is a blue LED that emits blue light having a wavelength of about 400 to 485 nm.
  • the sealing member 36 is a resin mold that seals the semiconductor light emitting element 32, and is formed of, for example, a transparent resin. Further, the sealing member 36 transmits the blue light generated by the semiconductor light emitting element 32 toward the elliptical mirror 14.
  • the elliptical mirror 14 is an example of the condensing optical member of the present invention.
  • the elliptical mirror 14 is attached to the support member 26 so as to cover the lower side of the LED module 12, and has a reflection surface 14 a formed of a spheroidal surface that reflects blue light emitted from the LED module 12 upward. ing.
  • the reflection surface 14a is provided such that the light emission center of the semiconductor light emitting element 32 is located at the first focus and the center of the phosphor module 30 is located at the second focus.
  • the elliptical mirror 14 thus formed condenses the blue light emitted from the semiconductor light emitting element 32 disposed at the first focal position on the phosphor module 30 disposed at the second focal position.
  • the phosphor module 30 is embedded in an opening 26 a formed in the support member 26.
  • the phosphor module 30 includes a phosphor 40, a wavelength selection filter 42 formed on the lower surface of the phosphor 40, and a support member 38 for supporting the phosphor 40 and the wavelength selection filter 42 and attaching to the support member 26. Including.
  • the phosphor module 30 generates white light by emitting blue light emitted from the LED module 12 and emits the light upward.
  • the phosphor 40 When the phosphor 40 is irradiated with light from the outside, the phosphor 40 emits light having a wavelength different from that of the irradiated light.
  • the phosphor 40 is formed of a YAG fluorescent material made of yttrium, aluminum, or garnet (YAG).
  • YAG garnet
  • the phosphor 40 When the phosphor 40 is irradiated with blue light emitted from the LED module 12, the phosphor 40 generates yellow light which is a complementary color of the blue light.
  • the phosphor 40 is formed by putting a mixture of a fluorescent material and a binder material into a hole formed in the center of a substantially square support member 38, and then forming a planar shape by a printing method.
  • the support member 38 is preferably formed of a metal having a high thermal conductivity such as aluminum.
  • the support member 38 functions as a heat radiating member that radiates heat generated in the phosphor 40, and can suppress deterioration of the phosphor 40 due to heat. Further, it is possible to avoid a decrease in light emission luminance due to a temperature rise of the phosphor 40.
  • the wavelength selection filter 42 is provided between the semiconductor light emitting element 32 of the LED module 12 and the phosphor 40.
  • the “between” of the semiconductor light emitting element 32 and the phosphor 40 here is “between” in the optical path of light traveling from the semiconductor light emitting element 32 to the phosphor 40.
  • the wavelength selection filter 42 is a dielectric multilayer film formed on the lower surface of the phosphor 40 by, for example, vapor deposition.
  • the wavelength selection filter 42 is formed so as to transmit blue light from the LED module 12 and reflect yellow light emitted from the phosphor 40.
  • a dielectric multilayer film is a thin film in which dielectric materials having different refractive indexes are alternately laminated in multiple layers. Due to the effects of multiple reflection and multiple interference, the dielectric multilayer film transmits substantially 100% of light in a predetermined wavelength band and other predetermined wavelengths. Can be designed to reflect almost 100% of the wavelength.
  • the wavelength selection filter 42 is formed to transmit approximately 100% of blue light having a wavelength of 400 to 485 nm and reflect approximately 100% of light having a wavelength of 486 to 800 nm.
  • the wavelength selection filter 42 has a characteristic of transmitting near-ultraviolet light and reflecting visible light. At this time, the wavelength selection filter 42 is formed to transmit approximately 100% of near-ultraviolet light having a wavelength of 370 to 430 nm and reflect approximately 100% of light having a wavelength of 431 to 780 nm.
  • the irradiation optical system 16 irradiates the white light emitted from the phosphor module 30 toward the front of the lamp by controlling the light distribution.
  • the irradiation optical system 16 is provided so as to surround the rear side, the side, and the upper side of the phosphor module 30, and is configured to reflect white light emitted from the phosphor module 30 toward the front of the lamp toward the optical axis Ax.
  • the reflector 24, a reflecting surface 26b formed on the upper surface of the support member 26 so as to reflect a part of the reflected light from the reflector 24 upward, and the reflector 24 and the reflecting surface 26b are provided in front of the vehicle.
  • a projection lens 22 that transmits the white light reflected by the reflector 24 or the reflection surface 26b and irradiates it in the front irradiation direction.
  • the projection lens 22 is a plano-convex lens having a convex front surface and a flat rear surface, and projects an image on the focal plane including the rear focal point F onto the virtual vertical screen in front of the lamp as a reverse image.
  • the projection lens 22 is supported by the lens holder 18.
  • the lens holder 18 is supported by a bracket portion 26 c provided at the front end of the support member 26.
  • the reflecting surface 24a of the reflector 24 has a long axis that is coaxial with the optical axis Ax, and is configured by a substantially elliptical curved surface having the central point of the phosphor module 30 as a first focal point.
  • the reflecting surface 24a is set to have an elliptical shape in which the vertical cross section along the optical axis Ax has the rear focal point F as the second focal point, and the eccentricity gradually increases from the vertical cross section toward the horizontal cross section. Is set to
  • the reflection surface 26b of the support member 26 is formed by applying a mirror surface treatment to the upper surface of the support member 26 by aluminum vapor deposition or the like.
  • the reflection surface 26 b reflects a part of the reflected light directed from the reflection surface 24 a of the reflector 24 toward the projection lens 22 so as to be incident on the projection lens 22 and emitted from the projection lens 22.
  • FIG. 2 is a diagram for explaining the operation of the vehicular lamp 10.
  • the blue light 50 emitted from the LED module 12 is shown to be directly incident on the phosphor module 30 without passing through the elliptical mirror 14.
  • the phosphor 40 of the phosphor module 30 and the wavelength selection filter 42 are shown to be separated from each other.
  • the blue light 50 generated by the semiconductor light emitting element 32 of the LED module 12 is incident on the lower surface of the wavelength selection filter 42.
  • the blue light 50 that has entered the wavelength selection filter 42 passes through the wavelength selection filter 42 and enters the lower surface of the phosphor 40.
  • the YAG fluorescent material in the phosphor 40 is excited by a part of the blue light 50, and yellow light is generated. Since this yellow light 52 is emitted isotropically from the phosphor 40, a part is directly emitted above the phosphor 40 (referred to as yellow light 52), but a part is below the phosphor 40. Emitted (represented as yellow light 54). The yellow light 54 emitted toward the lower side of the phosphor 40 is incident on the upper surface of the wavelength selection filter 42. However, since the wavelength selection filter 42 is formed so as to reflect yellow light, almost all yellow light is emitted.
  • the light 54 is reflected by the wavelength selection filter 42, enters the lower surface of the phosphor 40, and is emitted from the upper surface of the phosphor 40 (represented as yellow light 54 ′). Further, blue light 50 ′ that passes through the phosphor 40 without exciting the phosphor 40 is also emitted from the upper surface of the phosphor 40.
  • blue light 50 ′ transmitted through the phosphor 40, yellow light 52 directly emitted from the phosphor 40, and yellow light 54 ′ reflected by the wavelength selection filter 42 are emitted.
  • white light 56 is generated.
  • the generated white light 56 is subjected to light distribution control by the irradiation optical system 16 described above, and is irradiated toward the front of the lamp.
  • the yellow light emitted in the direction of the wavelength selection filter 42 is wavelength selected.
  • the light is reflected by the filter 42 and emitted upward from the phosphor 40. If the wavelength selection filter 42 is not provided, the light emitted downward from the phosphor 40 is not incident on the irradiation optical system 16 and cannot be extracted from the vehicular lamp 10.
  • the wavelength selection filter 42 between the LED module 12 and the phosphor 40 like the vehicular lamp 10 according to the present embodiment, yellow light emitted from the phosphor 40 in the direction of the wavelength selection filter 42 is irradiated. Since the light can be incident on the optical system 16, the light use efficiency can be improved and the luminance of the vehicular lamp 10 can be increased.
  • the blue light emitted from the semiconductor light emitting element 32 of the LED module 12 is collected by the elliptical mirror 14 and is incident on the phosphor 40 of the phosphor module 30. It has become. Accordingly, since the phosphor 40 and the semiconductor light emitting element 32 are provided apart from each other, the heat generated by the semiconductor light emitting element 32 is difficult to be transmitted to the phosphor 40, and deterioration of the phosphor 40 due to heat can be suppressed. Moreover, since the fall of the light emission brightness which arises with the temperature rise of the fluorescent substance 40 can be suppressed, the brightness
  • FIG. 3 is a side sectional view of a vehicular lamp 300 according to another embodiment of the present invention.
  • the same or corresponding components as those in the vehicular lamp 10 shown in FIG. are identical or corresponding components as those in the vehicular lamp 10 shown in FIG.
  • the vehicular lamp 300 includes four of a first LED module 312a, a second LED module 312b, a third LED module 312c, and a fourth LED module (not shown) that are distributed around the phosphor module 30. There are two LED modules. Hereinafter, the first to fourth LED modules are collectively referred to as “LED module 312”.
  • the first LED module 312a and the second LED module 312b are provided side by side in the vehicle front-rear direction with the phosphor module 30 interposed therebetween.
  • the third LED module 312c and the fourth LED module are provided side by side in the vehicle left-right direction with the phosphor module 30 in between.
  • the third LED module 312c is disposed on the back side of the wavelength selection filter 42 in FIG. 3, and the fourth LED module is disposed on the front side of the wavelength selection filter 42 in FIG.
  • the LED module 312 includes the semiconductor light emitting element 32 that emits blue light, similar to the vehicular lamp 10 illustrated in FIG. 1.
  • the LED module 312 is arranged so as to irradiate light with the highest intensity in the vertically downward direction.
  • Blue light emitted from the LED module 312 is reflected upward by the elliptical mirror 314 and is incident on the wavelength selection filter 42 of the phosphor module 30.
  • the elliptical mirror 314 has four reflecting surfaces formed of a spheroid having the light emission center of the semiconductor light emitting element 32 of the LED module 312 as the first focal point and the center of the phosphor module 30 as the second focal point. ing. That is, the elliptical mirror 14 collects the blue light emitted from the first LED module 312a on the phosphor module 30 and the blue light emitted from the second LED module 312b on the phosphor module 30.
  • the blue light emitted from the four LED modules 312 is condensed on the phosphor module 30 to generate white light.
  • the brightness of the irradiated light can be increased.
  • the vehicular lamp 300 is configured such that the blue light emitted from the semiconductor light emitting elements 32 of the four LED modules 312 is collected by the elliptical mirror 314 and enters the phosphor 40 of the phosphor module 30. Accordingly, since the phosphor 40 and the semiconductor light emitting element 32 of the LED module 312 are provided apart from each other, the heat generated by the semiconductor light emitting element 32 is difficult to be transmitted to the phosphor 40, and the phosphor 40 is deteriorated by heat. Can be suppressed. Moreover, since the fall of the light emission brightness which arises by the temperature rise of the fluorescent substance 40 can be suppressed, the brightness
  • FIG. 4 is a side sectional view of a vehicular lamp 400 according to still another embodiment of the present invention.
  • the same or corresponding components as those in the vehicular lamp 10 shown in FIG. 1 are identical or corresponding components as those in the vehicular lamp 10 shown in FIG.
  • the vehicle lamp 400 according to the present embodiment is also a projector-type lamp unit similar to the vehicle lamp 10 shown in FIG. 1, but in the vehicle lamp 400 according to the present embodiment, the LED module 412 is vertical.
  • the vehicle lamp 10 shown in FIG. 1 is different from the vehicle lamp 10 in that light is emitted upward.
  • the LED module 412 is fixed to the upper surface of the support member 26 so that the light emission center is located at the first focal point of the reflector 24 in the irradiation optical system 16.
  • the LED module 412 includes a semiconductor light emitting element, a wavelength selection filter, and a phosphor, and emits white light. The detailed configuration of the LED module 412 will be described later.
  • the white light emitted from the LED module 412 is condensed and reflected toward the optical axis Ax by the reflecting surface 24a of the reflector 24, and then forward through the projection lens 22. Irradiated.
  • FIG. 5 is a side sectional view of the LED module 412 used in the vehicle lamp 400 shown in FIG.
  • the LED module 412 includes a substrate 402, a semiconductor light emitting element 404 provided on the substrate 402, a wavelength selection filter 406 provided on the semiconductor light emitting element 404, and a wavelength selection filter 406.
  • a provided phosphor 408 and a sealing member 410 that seals the semiconductor light emitting element 404, the wavelength selection filter 406, and the phosphor 408 are provided.
  • the semiconductor light emitting element 404 is a blue LED that emits blue light having a wavelength of about 400 to 485 nm.
  • the wavelength selection filter 406 is a dielectric multilayer film formed on the upper surface of the semiconductor light emitting element 404 by, for example, vapor deposition. Or what formed the dielectric multilayer in the lower surface of the fluorescent substance 408 by vapor deposition may be mounted on the semiconductor light emitting element 404, for example.
  • the phosphor 408 is a phosphor formed of a YAG phosphor material.
  • the wavelength selection filter 406 is formed to transmit the blue light from the semiconductor light emitting element 404 and reflect the yellow light emitted from the phosphor 408.
  • the blue light generated by the semiconductor light emitting element 404 is incident on the lower surface of the wavelength selection filter 406. Then, almost all of the blue light incident on the wavelength selection filter 406 passes through the wavelength selection filter 406 and enters the lower surface of the phosphor 408.
  • the YAG phosphor in the phosphor 408 When blue light is incident on the phosphor 408, the YAG phosphor in the phosphor 408 is excited by a part of the blue light and generates yellow light. Since this yellow light is emitted isotropically from the phosphor 408, a part is emitted directly above the phosphor 408, but a part is emitted below the phosphor 408. Yellow light emitted toward the lower side of the phosphor 408 enters the upper surface of the wavelength selection filter 406. The yellow light incident on the upper surface of the wavelength selection filter 406 is substantially entirely reflected by the wavelength selection filter 406 formed to reflect the yellow light. Then, the reflected yellow light enters from the lower surface of the phosphor 408 and exits from the upper surface of the phosphor 408. Further, blue light that passes through the phosphor 408 without being excited is also emitted from the upper surface of the phosphor 408.
  • the yellow light emitted in the direction of the wavelength selection filter 406 is wavelength selected.
  • the light is reflected by the filter 406 and emitted upward of the phosphor 408.
  • the blue LED is used as the semiconductor light emitting element.
  • a semiconductor light emitting element that irradiates ultraviolet light having a wavelength of around 400 nm may be used.
  • a phosphor made of a fluorescent material that generates red light, green light, and blue light by irradiation with ultraviolet light is used.
  • a wavelength selection filter that transmits ultraviolet light but reflects red light, green light, and blue light is used.
  • the vehicular lamp is configured using the projector-type illumination optical system, but the configuration of the illumination optical system is not limited thereto.
  • a parabolic irradiation optical system that irradiates the white light emitted from the phosphor forward using a parabolic reflector, or the white light emitted from the phosphor directly in front of the projection lens.
  • the vehicular lamp may be configured using a direct-type illumination optical system that irradiates the light.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Led Device Packages (AREA)

Abstract

L’invention concerne un appareil d’éclairage de véhicule (10) comprenant : un élément émetteur de lumière semiconducteur (32) ; un matériau fluorescent (40) qui, lorsqu’il est irradié par une lumière provenant de l’extérieur, peut émettre une lumière présentant une longueur d’onde différente de celle de la lumière irradiée ; un filtre de sélection de longueur d’onde (42) disposé entre l’élément émetteur de lumière semiconducteur (32) et le matériau fluorescent (40), pouvant transmettre une lumière émise par l’élément émetteur de lumière (32) et réfléchir une lumière émise par le matériau fluorescent (40) ; ainsi qu’un système optique d’irradiation (16) permettant une irradiation au moyen d’une lumière directement émise par le matériau fluorescent (40) ou d’une lumière réfléchie par le filtre de sélection de longueur d’onde (42) dans une direction d’irradiation prédéterminée. L’appareil (10) selon l’invention présente une efficacité d’utilisation de lumière améliorée.
PCT/JP2009/057930 2008-04-22 2009-04-21 Appareil d’eclairage de vehicule WO2009131126A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2008111818A JP5271590B2 (ja) 2008-04-22 2008-04-22 車両用灯具
JP2008-111818 2008-04-22

Publications (1)

Publication Number Publication Date
WO2009131126A1 true WO2009131126A1 (fr) 2009-10-29

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PCT/JP2009/057930 WO2009131126A1 (fr) 2008-04-22 2009-04-21 Appareil d’eclairage de vehicule

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JP (1) JP5271590B2 (fr)
WO (1) WO2009131126A1 (fr)

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JP2011233650A (ja) * 2010-04-26 2011-11-17 Toshiba Corp 半導体発光装置
JP2012109400A (ja) * 2010-11-17 2012-06-07 Sharp Corp 発光素子、発光装置および発光素子の製造方法
GB2497949A (en) * 2011-12-22 2013-07-03 Sharp Kk Headlight system with adaptive beam function
WO2013178415A1 (fr) * 2012-05-31 2013-12-05 Osram Gmbh Lentille à couche de réflexion réfléchissant vers l'intérieur
GB2504334A (en) * 2012-07-26 2014-01-29 Sharp Kk Headlight system with adaptive beams
WO2015121123A1 (fr) * 2014-02-17 2015-08-20 Osram Gmbh Dispositif d'éclairage équipé d'un moyen de conversion
WO2016204139A1 (fr) * 2015-06-16 2016-12-22 三菱電機株式会社 Dispositif de phare et dispositif d'éclairage
EP3181995A1 (fr) * 2015-12-15 2017-06-21 LG Innotek Co., Ltd. Dispositif électroluminescent et appareil d'éclairage pour véhicules comprenant celui-ci
DE102016203844A1 (de) * 2016-03-09 2017-09-14 Osram Gmbh Leuchtvorrichtung mit Leuchtstoffvolumen und Halbleiterlichtquelle
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