WO2013018503A1 - Dispositif électroluminescent - Google Patents

Dispositif électroluminescent Download PDF

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Publication number
WO2013018503A1
WO2013018503A1 PCT/JP2012/067309 JP2012067309W WO2013018503A1 WO 2013018503 A1 WO2013018503 A1 WO 2013018503A1 JP 2012067309 W JP2012067309 W JP 2012067309W WO 2013018503 A1 WO2013018503 A1 WO 2013018503A1
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WO
WIPO (PCT)
Prior art keywords
light
emitting device
scattering
fluorescent
fluorescent member
Prior art date
Application number
PCT/JP2012/067309
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English (en)
Japanese (ja)
Inventor
克彦 岸本
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2013018503A1 publication Critical patent/WO2013018503A1/fr

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    • 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
    • F21S41/176—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
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
    • F21S43/20—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by refractors, transparent cover plates, light guides or filters
    • F21S43/235—Light guides

Definitions

  • the present invention relates to a light emitting device, and more particularly, to a light emitting device including a fluorescent member that emits fluorescence when irradiated with laser light.
  • a light-emitting device including a fluorescent member that is irradiated with laser light is known (for example, see Patent Document 1).
  • an infrared generator laser generator
  • infrared light laser light
  • infrared light emitted from the infrared generator are irradiated with visible light.
  • a visible light source device comprising a light conversion material powder (phosphor particles) that is converted into (fluorescence) and emitted, and a concave mirror (reflecting member) that reflects light emitted from the light conversion material powder. ing.
  • coherent light refers to light with high coherence (coherence) that is spatially aligned in phase.
  • the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a light-emitting device capable of improving safety for eyes.
  • a light emitting device is arranged in a fluorescent member that emits fluorescence when irradiated with laser light, which is excitation light, and in a passing region of the excitation light.
  • a plurality of scatterer particles are provided that cause Rayleigh scattering without converting excitation light into fluorescence.
  • the laser light (excitation light) is scattered by the scatterer particles.
  • the area of the exit region of the excitation light exiting from the scattering member or the fluorescent member containing the scatterer particles Can be bigger. That is, the emission point of excitation light can be increased. Thereby, it can suppress that the excitation light radiate
  • Rayleigh scattering has a characteristic represented by the following formula (1), and the scattering coefficient k s is inversely proportional to the fourth power of the wavelength of the irradiated light. For this reason, for example, 450 nm blue light (excitation light) is scattered about 6.2 times stronger than 710 nm red light (fluorescence). Thereby, it is possible to suppress the scattering of the fluorescence while strongly scattering the excitation light. For this reason, it can suppress that fluorescence is wastedly scattered by the scatterer particle
  • n is the number of particles
  • m is the reflection coefficient
  • d is the particle diameter
  • ⁇ is the wavelength
  • the scatterer particles that do Rayleigh scattering without converting the excitation light into fluorescence absorb the fluorescence from the fluorescent member and do not convert the wavelength into fluorescence of another wavelength. Therefore, the intensity of the fluorescence from the fluorescent member does not decrease, and the chromaticity of the light emitted from the light emitting device does not change.
  • the light emitting device preferably includes a scattering member including a transparent member in which a plurality of scatterer particles are dispersed. If comprised in this way, a several scatterer particle can be disperse
  • the scattering member is preferably in contact with the fluorescent member. If comprised in this way, since the heat
  • the light emitting device in which the scattering member is in contact with the fluorescent member, preferably, the light emitting device further includes a holding member that holds the fluorescent member, and the scattering member is in contact with the holding member. If comprised in this way, since the heat
  • the scattering member is disposed on the opposite side to the irradiation surface irradiated with the excitation light of the fluorescent member. If comprised in this way, even if it is a case where a part of laser beam permeate
  • the scattering member is preferably disposed on the irradiation surface side on which the excitation light of the fluorescent member is irradiated. If comprised in this way, the laser beam which is excitation light can be easily scattered by a scatterer particle. Further, since the fluorescent member can be irradiated with the excitation light scattered to some extent, it is possible to suppress the fluorescent member from being locally heated and deteriorated.
  • the fluorescence converted by the fluorescent member and the excitation light not converted by the fluorescent member are used as illumination light.
  • the scattering member does not substantially scatter fluorescence. If comprised in this way, it can suppress more that fluorescence is wastedly scattered by the scattering member, and optical loss arises.
  • the scatterer particles have a particle diameter of 1 nm or more and 20 nm or less. With this configuration, the excitation light can be easily Rayleigh scattered.
  • the excitation light has a center wavelength of 380 nm or more and 470 nm or less. The shorter the central wavelength of the excitation light, the higher the rate at which the excitation light is Rayleigh scattered.
  • the light emitting device preferably further includes a reflecting member that reflects the fluorescence emitted from the fluorescent member toward the outside.
  • the reflective member includes a reflective surface formed in a shape having a focal point
  • the fluorescent member is located in a region including the focal point of the reflective surface or in the vicinity of the focal point of the reflective surface. Has been placed. If comprised in this way, the light (illumination light) radiate
  • the light emitting device preferably further includes a laser generator that emits laser light.
  • the lighting device 1 is used as a headlamp that illuminates the front of a car or the like, for example.
  • the illumination device 1 includes a semiconductor laser 2 (laser generator) that functions as a laser light source (excitation light source), a light guide member 3 disposed in front of the semiconductor laser 2, and a laser that is excitation light.
  • the semiconductor laser 2 is composed of a semiconductor laser element (not shown) and a package on which the semiconductor laser element is mounted.
  • the semiconductor laser 2 is configured to emit laser light having a center wavelength of, for example, about 380 nm to about 470 nm.
  • the semiconductor laser 2 is configured to emit blue-violet laser light having a center wavelength of about 405 nm.
  • Laser light is coherent light.
  • the light guide member 3 has a function of guiding laser light emitted from the semiconductor laser 2 to the fluorescent member 4.
  • an optical fiber, a lens, a reflecting mirror, a member that guides light by reflecting light inside using a difference in refractive index from the surroundings, or the like can be used, and a plurality of these are used in combination. May be.
  • the light guide member 3 is provided as necessary.
  • the semiconductor laser 2 may not be provided in the vicinity of the fluorescent member 4.
  • the fluorescent member 4 has an irradiation surface 4a irradiated with excitation light (laser light), a non-irradiation surface 4b (surface opposite to the irradiation surface 4a), and a side surface 4c connecting the irradiation surface 4a and the irradiated surface 4b. Is included.
  • the fluorescent member 4 has a function of emitting fluorescence when irradiated with laser light that is excitation light.
  • the fluorescent member 4 emits fluorescence having a center wavelength larger than that of the excitation light.
  • the fluorescent member 4 includes, for example, three types of phosphor particles (not shown) that convert blue-violet laser light into red light, green light, and blue light, respectively.
  • the white illumination light is obtained by mixing the fluorescence of the red light, the green light and the blue light emitted from the fluorescent member 4.
  • the fluorescent member 4 it is possible to use a material obtained by mixing phosphor particles in glass, resin, or the like, or a material obtained by pressing or sintering the phosphor particles.
  • the phosphor particles have a particle diameter of about 1 ⁇ m or more and about 30 ⁇ m or less.
  • the particle diameter of the phosphor particles means the length of the longest straight line that crosses the phosphor particles. The same applies to the particle diameter of scatterer particles 6a described later.
  • the holding member 5 is made of a material having high thermal conductivity such as metal or graphite. As shown in FIGS. 1 and 2, the holding member 5 includes a holding portion 5a that holds the side surface 4c (see FIG. 1) of the fluorescent member 4, a mounting portion 5b that is attached to the reflecting member 7 (see FIG. 1), and a holding member. And a plurality of rod-like connecting portions 5c that connect the portion 5a and the mounting portion 5b.
  • the holding part 5a may directly hold the side surface 4c of the fluorescent member 4 or may hold it through an adhesive layer or the like.
  • the mounting portion 5 b is fixed to the end portion of the reflecting member 7 using a bolt 11 or a screw (not shown).
  • the scattering member 6 includes a transparent member 6b in which a plurality of scatterer particles 6a are uniformly dispersed.
  • the transparent member 6b is formed of a resin-based sealing material such as silicone resin or organic-inorganic hybrid glass (HBG), inorganic glass, or the like.
  • HBG organic-inorganic hybrid glass
  • the scattering member 6 is formed so that the plurality of scatterer particles 6a are uniformly dispersed therein, particularly when inorganic glass having a melting point of 600 degrees or less, which is called low melting glass, is used. It can be easily manufactured.
  • the scatterer particle 6a has a particle diameter of about 1 nm to about 20 nm. For this reason, the scatterer particle
  • the scatterer particle 6a Y 2 O 3 (yttrium oxide), diamond, Al 2 O 3 (aluminum oxide), or the like can be used.
  • the scatterer particle 6a has a function of converting excitation light into fluorescence. Absent. Further, the scatterer particles 6 a are contained in the scattering member 6 in the range of 0.1 wt% to 10 wt%. If the amount of the scatterer particles 6a is too small, the effect of Rayleigh scattering of the excitation light becomes low. If the amount of the scatterer particles 6a is too large, the difference in the refractive index in the scattering member 6 becomes small and the excitation light is dispersed (the emission point is increased). It becomes difficult.
  • the scattering member 6 (transparent member 6b) contains no particles other than the scatterer particles 6a, the scattering member 6 does not scatter fluorescence and excitation light.
  • the scattering member 6 also transmits fluorescence and excitation light. It can be said that there is substantially no Mie scattering.
  • the scattering member 6 is formed so as to cover the non-irradiated surface 4 b side of the fluorescent member 4, and is disposed in the excitation light passage region. Specifically, the scattering member 6 is provided so as to be in contact with the non-irradiated surface 4 b and a part of the side surface 4 c of the fluorescent member 4, and a part of the excitation light is transmitted through the fluorescent member 4 to the scattering member 6. To reach. The scattering member 6 is also in contact with the holding member 5.
  • the scattering member 6 is formed to a thickness of about 0.1 mm to 2.0 mm.
  • the front surface 6c of the scattering member 6 does not have to be a flat surface, and may be formed in a convex shape (convex lens shape), a concave shape (concave lens shape), a polyhedral shape, or other shapes. If the front surface 6c is formed in a convex shape, a concave shape, or a polyhedral shape, the direction and amount of illumination light (fluorescence) emitted can be controlled.
  • the scattering member 6 may be formed by applying a resin or the like containing the scatterer particles 6a on the surface of the fluorescent member 4 and curing it. Moreover, the scattering member 6 may be formed by providing a recess in the transparent member 6b containing the scatterer particles 6a, and the fluorescent member 4 may be fitted in the recess.
  • the reflection member 7 is made of, for example, metal and has a function of radiating heat from the holding member 5.
  • the reflecting member 7 has a reflecting surface 7a formed in a concave shape.
  • the reflection surface 7a has a function of reflecting the fluorescence emitted from the fluorescent member 4 toward the outside.
  • the reflective surface 7a is formed so as to include a part of a paraboloid, for example.
  • the fluorescent member 4 is disposed in a region including the focal point F1 of the reflecting surface 7a.
  • An insertion hole 7 b for inserting the light guide member 3 is formed at the apex of the reflection surface 7 a of the reflection member 7.
  • the excitation light (laser light) emitted from the semiconductor laser 2 is guided to the light guide member 3 and applied to the irradiation surface 4 a of the fluorescent member 4.
  • the excitation light incident on the fluorescent member 4 is converted into fluorescence (for example, red light, green light, and blue light) by the phosphor particles. Then, the fluorescence is emitted in all directions from the fluorescent member 4 (irradiated surface 4a, non-irradiated surface 4b, and side surface 4c).
  • the red light and the green light emitted from the non-irradiation surface 4 b and the side surface 4 c of the fluorescent member 4 and incident on the scattering member 6 are emitted to the outside with almost no scattering by the scattering member 6.
  • part of the excitation light that has not been converted to fluorescence passes through the fluorescent member 4.
  • the area of the excitation light emission region S (see FIG. 4) emitted from the fluorescent member 4 is very small compared to the area of the fluorescent emission region (the entire surface of the fluorescent member 4) emitted from the fluorescent member 4.
  • transmitted the fluorescent member 4 and entered into the scattering member 6 is scattered by the scattering member 6, and radiate
  • the lighting device 1 satisfies Class 1 such as the international safety standard IEC 60825-1 and JIS C6802. A part of the excitation light scattered by the scattering member 6 returns (enters again) to the fluorescent member 4 and is converted into fluorescence by the fluorescent member 4.
  • Class 1 such as the international safety standard IEC 60825-1 and JIS C6802.
  • a plurality of scatterer particles 6a that do not convert excitation light into fluorescence but perform Rayleigh scattering are provided.
  • the laser light (excitation light) is scattered by the scatterer particles 6a.
  • the area of the emission region of the excitation light emitted from the scattering member 6 can be made larger than the area of the emission region S of the excitation light emitted from the fluorescent member 4 when the scattering member 6 is not provided. That is, the emission point of excitation light can be increased. Thereby, it can suppress that the excitation light radiate
  • Rayleigh scattering has the characteristic expressed by the above formula (1), and the scattering coefficient k s is inversely proportional to the fourth power of the wavelength of the irradiated light.
  • the scatterer particle 6a that does Rayleigh scattering without converting the excitation light into fluorescence does not absorb the fluorescence from the fluorescent member 4 and converts it into fluorescence of another wavelength. Therefore, the intensity of the fluorescence from the fluorescent member 4 does not decrease, and the chromaticity of the fluorescence emitted from the lighting device 1 does not change.
  • the scatterer particles are phosphors, a phenomenon called so-called self-absorption occurs in which the scatterer particles re-absorb the fluorescence emitted from the fluorescent member 4 to emit fluorescence. For this reason, the fluorescence emitted from the illumination device 1 may deviate from the desired chromaticity, or the extraction efficiency of the fluorescence from the fluorescent member 4 may decrease.
  • the scattering member 6 including the transparent member 6b in which a plurality of the scatterer particles 6a are dispersed is provided.
  • the plurality of scatterer particles 6a can be easily and uniformly dispersed.
  • a transparent member transparent member 6b
  • the transparent member 6b in which the scatterer particles 6a are dispersed can be formed of a material different from the glass or resin constituting the fluorescent member 4.
  • the transparent member 6b can be formed, for example using a material with high heat conductivity, heat dissipation can be improved.
  • the scattering member 6 is brought into contact with the fluorescent member 4.
  • produces in the fluorescent member 4 can be thermally radiated through the scattering member 6, it can suppress that the fluorescent member 4 becomes high temperature.
  • the efficiency of converting the excitation light into fluorescence decreases. Therefore, suppressing the fluorescent member 4 from becoming high temperature prevents the conversion efficiency of the fluorescent member 4 from decreasing. it can.
  • the transparent member 6b of the scattering member 6 is made of an inorganic glass having a thermal conductivity that is several to several tens of times higher than that of the resin, the heat dissipation can be further improved.
  • the scattering member 6 and the fluorescent member 4 can be made comparable size.
  • the light emission point of blue light (blue light emission region) and the red light and green light emission points (red light and green light emission region) can be of the same size, and can be used as illumination light. The occurrence of color unevenness can be suppressed.
  • the scattering member 6 is brought into contact with the holding member 5. Therefore, since the heat generated in the fluorescent member 4 can be dissipated through the scattering member 6 and the holding member 5, it is possible to further suppress the fluorescent member 4 from becoming high temperature.
  • the scattering member 6 is disposed on the non-irradiated surface 4b side of the fluorescent member 4. Thereby, the excitation light transmitted through the fluorescent member 4 can be scattered, and a part of the excitation light can be returned to the fluorescent member 4. Thereby, the conversion efficiency of the fluorescent member 4 can be improved.
  • the scatterer particle 6a does not substantially scatter the fluorescence. Thereby, it is possible to further suppress the occurrence of light loss due to the wasteful scattering of fluorescence by the scattering member 6.
  • the excitation light can be easily Rayleigh scattered by setting the particle diameter of the scatterer particle 6a to 1 nm or more and 20 nm or less.
  • the fluorescent member 4 is disposed in a region including the focal point F1 of the reflecting surface 7a. Thereby, the light (illumination light) emitted from the illumination device 1 to the outside can be easily brought close to parallel light.
  • the semiconductor laser 2 is configured to emit blue laser light having a center wavelength of about 450 nm, for example.
  • the fluorescent member 4 is fixed to the holding member 15 from a metal block or the like.
  • the holding surface 15a of the holding member 15 may be formed of a reflecting surface having a light reflecting function.
  • the fluorescent member 4 includes phosphor particles that convert part of blue excitation light into yellow light. Then, the blue light that has not been converted by the fluorescent member 4 and the converted yellow light are mixed, whereby white illumination light is obtained. That is, the excitation light (blue light) not converted by the fluorescent member 4 and the fluorescence (yellow light) converted by the fluorescent member 4 are used as illumination light.
  • the fluorescent member 4 may include two types of phosphor particles that convert part of blue excitation light into red light and green light, respectively.
  • the scattering member 6 is formed so as to cover the irradiation surface 4a side of the fluorescent member 4, and is disposed in the excitation light passing region. Specifically, the scattering member 6 is provided in contact with the irradiation surface 4 a and the side surface 4 c of the fluorescent member 4. The scattering member 6 is also in contact with the holding member 15.
  • the front surface 6c of the scattering member 6 may be formed in a so-called moth-eye shape (one having a plurality of fine protrusions (for example, pyramidal protrusions)) or an antireflection film (not shown) may be provided on the front surface 6c. Good. If comprised in this way, it is possible to suppress that excitation light is surface-reflected by the front surface 6c of the scattering member 6, and it is possible to suppress the excitation light from being emitted outside in a state where it is not scattered. It is.
  • the scatterer particles 6 a are contained in the scattering member 6 in an amount of 5 wt% to 50 wt%.
  • the excitation light (laser light) emitted from the semiconductor laser 2 is guided to the light guide member 3 and applied to the front surface 6 c of the scattering member 6.
  • a part of the excitation light incident on the scattering member 6 is scattered by the scatterer particles 6 a, and the remaining excitation light passes through the scattering member 6.
  • the excitation light that has passed through the scattering member 6 and entered the fluorescent member 4 is converted into fluorescent light (for example, yellow light) by the phosphor particles. Then, the fluorescence is emitted from the fluorescent member 4 (irradiation surface 4a and side surface 4c). At this time, the fluorescence emitted from the irradiation surface 4 a and the side surface 4 c of the fluorescent member 4 and incident on the scattering member 6 is emitted to the outside with almost no scattering by the scattering member 6.
  • a part of the excitation light that has entered the fluorescent member 4 and has not been converted into fluorescence is changed in traveling direction by the holding surface 15a of the holding member 15 or the fluorescent particles of the fluorescent member 4, and returns to the scattering member 6.
  • the excitation light that has returned to the scattering member 6 and a part of the excitation light that has been guided to the light guide member 3 and entered the scattering member 6 are scattered by the scatterer particles 6a and the surface of the scattering member 6 (the front surface 6c and the front surface). Outgoing from the side surface 6d).
  • the scattering member 6 is arranged on the irradiation surface 4a side of the fluorescent member 4. Therefore, since it can irradiate to the fluorescent member 4 in the state which scattered the excitation light to some extent, it can suppress that the fluorescent member 4 generates heat locally and deteriorates.
  • the light-emitting device of the present invention is used for a headlight of an automobile.
  • the light-emitting device of the present invention is applied to a headlamp (illumination device) has been described. You may apply the light-emitting device of this invention to a downlight or a spotlight, and another illuminating device.
  • excitation light is converted into visible light
  • the present invention is not limited to this, and excitation light may be converted into light other than visible light.
  • the excitation light when it is converted into infrared light, it can be applied to a night illumination device for a security CCD camera, an infrared light emitting device for an infrared heater, or the like.
  • the excitation light source semiconductor laser
  • the fluorescent member are configured so as to obtain white illumination light.
  • the present invention is not limited to this. You may comprise an excitation light source and a fluorescent member so that illumination lights other than white may be obtained.
  • a semiconductor laser is used as a laser generator that emits laser light
  • the present invention is not limited to this, and a laser generator other than a semiconductor laser may be used.
  • the reflecting surface of the reflecting member is formed by a part of a paraboloid.
  • the present invention is not limited to this, and the reflecting surface may be formed by a part of an elliptical surface, for example. Good.
  • the light emitted from the illumination device can be easily condensed by positioning the fluorescent member at the focal point of the reflecting surface.
  • the reflecting surface may be formed by a multi-reflector composed of a large number of curved surfaces (for example, a parabolic surface) or a free curved surface reflector provided with a large number of fine planes continuously.
  • the transparent member is made to contain a plurality of scatterer particles, and the scattering member (scatterer particle and transparent member) is provided separately from the fluorescent member.
  • the present invention is not limited to this.
  • a plurality of scatterer particles may be contained in the fluorescent member. That is, the phosphor particles and the scatterer particles may be contained in glass or resin constituting the fluorescent member. If comprised in this way, since excitation light is scattered inside a fluorescent member, the probability that excitation light will be converted into fluorescence with a fluorescent substance particle becomes high. Thereby, the conversion efficiency of a fluorescent member can be improved.
  • the scattering member is in contact with the fluorescent member.
  • the present invention is not limited to this, and the scattering member may be arranged at a predetermined distance from the fluorescent member.
  • a scattering member can be provided so as to cover the front of the holding member (the left side in FIG. 1).
  • a scattering member may be provided so as to cover both the irradiation surface and the non-irradiation surface of the fluorescent member. In this case, a scattering member may be provided so as to cover the entire surface of the fluorescent member.
  • a scattering member may be provided so as not to cover the side surface of the fluorescent member as in the illumination device according to the modification of the present invention shown in FIG. That is, the scattering member may be formed in the same size as the irradiation surface (or non-irradiation surface) of the fluorescent member.
  • the emission point of fluorescence (fluorescence emission region) and the emission point of excitation light (excitation light emission region) can be made the same size.
  • the present invention is not limited thereto, and the fluorescent member may be disposed in the vicinity of the focal point of the reflecting surface. Good.
  • a reflecting member that reflects fluorescence toward the outside is provided.
  • the present invention is not limited thereto, and a reflecting member may not be provided.
  • Lighting device (light emitting device) 2 Semiconductor laser (laser generator) 4 Fluorescent member 4a Irradiation surface 5, 15 Holding member 6 Scattering member 6a Scattering particle 6b Transparent member 7 Reflecting member 7a Reflecting surface F1 Focus

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

L'invention concerne un dispositif électroluminescent permettant d'améliorer la sécurité des yeux. Un dispositif d'irradiation (dispositif électroluminescent) (1) comprend : un élément fluorescent (4) qui émet une fluorescence résultant de son irradiation par une lumière laser constituant une lumière d'excitation ; et un élément de diffusion (6) qui effectue une diffusion de Rayleigh sans transformer la lumière d'excitation en fluorescence.
PCT/JP2012/067309 2011-07-29 2012-07-06 Dispositif électroluminescent WO2013018503A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011166265A JP2013030380A (ja) 2011-07-29 2011-07-29 発光装置
JP2011-166265 2011-07-29

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Publication Number Publication Date
WO2013018503A1 true WO2013018503A1 (fr) 2013-02-07

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WO (1) WO2013018503A1 (fr)

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JP2005251488A (ja) * 2004-03-03 2005-09-15 Hitachi Displays Ltd 発光素子，発光型表示装置及び照明装置
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WO2014125782A1 (fr) * 2013-02-18 2014-08-21 株式会社小糸製作所 Appareil de lampe de véhicule
US20150345728A1 (en) 2013-02-18 2015-12-03 Koito Manufacturing Co., Ltd. Automotive lamp
EP2957818A4 (fr) * 2013-02-18 2016-11-23 Koito Mfg Co Ltd Appareil de lampe de véhicule
JPWO2014125782A1 (ja) * 2013-02-18 2017-02-02 株式会社小糸製作所 車両用灯具
US10247381B2 (en) 2013-02-18 2019-04-02 Koito Manufacturing Co., Ltd. Automotive lamp

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