WO2016208288A1 - Dispositif d'émission de lumière et système de commande - Google Patents

Dispositif d'émission de lumière et système de commande Download PDF

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Publication number
WO2016208288A1
WO2016208288A1 PCT/JP2016/063997 JP2016063997W WO2016208288A1 WO 2016208288 A1 WO2016208288 A1 WO 2016208288A1 JP 2016063997 W JP2016063997 W JP 2016063997W WO 2016208288 A1 WO2016208288 A1 WO 2016208288A1
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WO
WIPO (PCT)
Prior art keywords
light
wavelength conversion
emitting device
conversion member
light emitting
Prior art date
Application number
PCT/JP2016/063997
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English (en)
Japanese (ja)
Inventor
佳伸 川口
宜幸 高平
高橋　幸司
Original Assignee
シャープ株式会社
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Application filed by シャープ株式会社 filed Critical シャープ株式会社
Priority to JP2017524726A priority Critical patent/JP6513803B2/ja
Publication of WO2016208288A1 publication Critical patent/WO2016208288A1/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
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/02—Structural details or components not essential to laser action
    • H01S5/022—Mountings; Housings
    • H01S5/0239—Combinations of electrical or optical elements
    • 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
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/06—Arrangements for controlling the laser output parameters, e.g. by operating on the active medium
    • H01S5/068—Stabilisation of laser output parameters
    • H01S5/0683—Stabilisation of laser output parameters by monitoring the optical output parameters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
    • H01S5/00—Semiconductor lasers
    • H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30

Definitions

  • the present invention relates to a light-emitting device including a wavelength conversion member that emits light whose wavelength is converted by receiving laser light, and a control system that controls the light-emitting device.
  • a laser element such as a semiconductor laser (LD) is used as an excitation light source, and fluorescence generated by irradiating a wavelength conversion member such as a phosphor light emitting portion with laser light emitted from the laser element is used as illumination light.
  • a light emitting device used as the above.
  • the light emitting device using the LD can be separated from the phosphor light emitting portion and the LD portion as compared with the light emitting device using the LED (Light Emitting Diode).
  • Patent Document 1 An example of a light emitting device using the LD as described above is disclosed in Patent Document 1.
  • This light-emitting device is a so-called reflective light-emitting device in which the incident direction of the LD and the light-emitting direction from the phosphor light-emitting portion are the same.
  • the LD and the blue light emitted from the LD The phosphor that emits white light by a color mixing action and a reflecting surface that is disposed so as to cover the phosphor from the rear to the top of the phosphor and reflects the light emitted from the phosphor to the front of the device And a projection lens that projects the light reflected by the reflector to the outside.
  • JP 2012-164585 A (published on August 30, 2012)
  • Patent Document 1 has the following problems.
  • the light emitting device disclosed in Patent Document 1 has a structure in which the distance between the light extraction side where the projection lens is present and the light emission side where the phosphor is present is large, and thus there is a limit to downsizing the device. There is a problem.
  • the present invention has been made in view of the above problems, and an object of the present invention is to provide a light emitting device and the like that can reduce the size of the device and reduce the loss of the amount of light extracted outside the device. There is to do.
  • a light-emitting device includes a wavelength conversion member that receives laser light emitted from at least one laser element and emits wavelength-converted light, and the laser light. Is disposed at a position facing the light inlet, and is introduced from the light inlet. At least one optical path changing member that changes the optical path of the laser beam directed toward the wavelength converting member, and a straight line passing through the optical entrance and the optical path changing member is the wavelength converting member and the light extraction It is located between the mouth.
  • the present invention it is possible to reduce the size of the device and to reduce the loss of the amount of light extracted outside the device.
  • FIG. 1 is a side view which shows the structure of the light-emitting device which concerns on Embodiment 1 of this invention
  • (b) is a side view which shows the structure of the modification of the said light-emitting device.
  • (A) is a top view which shows the structure when the said light-emitting device is seen from the light extraction opening
  • (b) is a top view of the light-emitting device of the comparative example A.
  • (A) is a side view which shows the structure of the light-emitting device which concerns on the said Embodiment 1
  • (b) is a side view which shows the structure of the light-emitting device of the comparative example B
  • (c) is the comparative example C It is a side view which shows the structure of this light-emitting device.
  • (A) is a side view which shows the structure of the light-emitting device which concerns on Embodiment 2 of this invention
  • (b) is a side view which shows the structure of the modification of the said light-emitting device.
  • It is a top view which shows the structure of the light-emitting device which concerns on Embodiment 3 of this invention.
  • (A) is a top view which shows the structure of the light-emitting device concerning Embodiment 4 of this invention
  • (b) is sectional drawing of the AA 'cross section of the light-emitting device shown to (a)
  • (c ) Is a cross-sectional view of the BB ′ cross section of the light emitting device shown in FIG.
  • Embodiments of the present invention will be described with reference to FIGS. 1 to 8 as follows. Descriptions of configurations other than those described in the following specific embodiments may be omitted as necessary, but are the same as those configurations when described in other embodiments. For convenience of explanation, members having the same functions as those shown in each embodiment are given the same reference numerals, and the explanation thereof is omitted as appropriate.
  • FIG. 1A is a side view showing the structure of the light emitting device 100a.
  • the light-emitting device 100a includes an LD unit composed of a laser element 1, an optical fiber 2, a heat sink 11, and a radiation fin 12, and a light-emitting unit 10 other than the LD unit.
  • the light emitting unit 10 includes a base plate 9 and a cover member 8 on which the wavelength conversion member 7 is mainly installed. More specifically, the light emitting unit 10 includes a condenser lens 3a, a lens support member 4, a mirror (optical path changing member) 5, a mirror support member 6, a wavelength conversion member 7, a cover member 8, and a base plate 9.
  • the laser element 1 is an element that functions as an excitation light source that emits laser light (excitation light).
  • a laser diode (LD) will be described as an example of the laser element 1, but the present invention is not limited to this, and any element that emits laser light may be used.
  • the laser element 1 may have one light emitting point on one chip, or may have a plurality of light emitting points on one chip.
  • the laser element 1 may be an LD module composed of a plurality of LDs.
  • the laser element 1 includes an electrode terminal (not shown), and a wiring (not shown) is connected to the electrode terminal. Electric power is supplied to the laser element 1 through the wiring and the electrode terminal.
  • the laser element 1 is mounted on, for example, a metal package having a diameter of 5.6 mm, and the output per one is 1 W and oscillates a laser beam L1 having a wavelength of 445 nm.
  • the oscillation wavelength is not limited to this, and the laser element 1 may oscillate a so-called blue laser beam having a peak wavelength in a wavelength range of 440 nm to 490 nm. Laser light in the vicinity of blue-violet with a wavelength of about 405 nm may be used. What is necessary is just to select the said oscillation wavelength suitably according to the kind etc. of the fluorescent substance included in the wavelength conversion member 7.
  • the laser element 1 is optically coupled to the light emitting unit 10 by the optical fiber 2, whereby the laser element 1 has a structure separated from the light emitting unit 10. For this reason, there is an advantage that the light emitting unit 10 is reduced in size and heat is reduced.
  • the laser element 1 may be in various forms such as a metal package having a diameter of 9 mm.
  • the optical fiber 2 is a light guide member that guides the laser light L1 emitted from the laser element 1 to an optical entrance ENT of a cover member 8 to be described later.
  • the optical fiber 2 has an incident end 2a that receives the laser light L1 emitted from the laser element 1, and an emission end 2b that emits the laser light L1 incident from the incident end 2a.
  • the incident end 2a of the optical fiber 2 is connected to the laser beam emitting portion (near the above-described light emitting point) of the laser element 1, and the emitting end 2b of the optical fiber 2 is connected to the optical entrance ENT of the cover member 8.
  • An optical member such as a lens may be provided to facilitate optical coupling between the laser beam emitting portion and the optical fiber 2.
  • the optical fiber 2 has a two-layer structure in which the core of the core is covered with a clad having a refractive index lower than that of the core.
  • the core is mainly composed of quartz glass (silicon oxide) with little absorption loss of the laser beam L1.
  • the clad is mainly composed of quartz glass or a synthetic resin material having a refractive index lower than that of the core.
  • the optical fiber 2 is a so-called rectangular core type optical fiber made of quartz having a core having a side of 200 ⁇ m, a cladding diameter of 800 ⁇ m, and a numerical aperture NA of 0.1.
  • the structure, thickness, and material of the optical fiber 2 are not limited to those described above, and the cross section perpendicular to the major axis direction of the core optical fiber 2 may be rectangular or circular.
  • various light guide members such as a lot lens can be used.
  • the laser beam L1 may be directly incident on the condenser lens 3a without using a light guide member such as the optical fiber 2.
  • condenser lens 3a In order to efficiently irradiate the mirror 5 with the laser light L1, it is preferable to have the condenser lens 3a as in the present embodiment.
  • the condensing lens 3a adjusts (for example, reduces) the beam diameter of the laser light L1 incident from the optical entrance ENT.
  • the condensing lens 3a of this embodiment is disposed on the base plate 9 between the light entrance ENT of the cover member 8 and a mirror 5 (or wavelength conversion member 7) described later.
  • the condensing lens 3a for example, an aspherical convex lens having a diameter of 2 mm is used.
  • the condensing lens 3a receives the laser light L1 emitted from the emission end 2b of the optical fiber 2 at the lens incident surface, and controls the beam diameter and optical path of the laser light L1 received at the lens incident surface. Then, the controlled laser beam L1 is emitted as convergent light from the lens exit surface to the mirror 5.
  • the laser light L1 at the emission end 2b of the optical fiber 2 is provided. It is possible to form a near-field image that is a distribution of the image on the wavelength conversion member 7. That is, the near-field image is formed on the wavelength conversion member 7 by the condenser lens 3 a and the mirror 5.
  • the lens support member 4 supports the condensing lens 3a at a position adjusted so that the reflected light L1 ′ of the laser light L1 reflected by the mirror 5 is appropriately irradiated to a desired position of the wavelength conversion member 7. And is arranged on the surface of the base plate 9 in order to define the position of the condenser lens 3a.
  • the lens support member 4 supports the condenser lens 3a so that at least the optical axis of the emission end 2b of the optical fiber 2 and the optical axis of the condenser lens 3a substantially coincide.
  • the desired position is a position defined such that the laser beam L1 ′ reflected by the mirror 5 is irradiated on the light receiving surface (or the light emitting surface that emits fluorescence) of the wavelength conversion member 7. That is, on the surface of the base plate 9, the output end 2 b of the optical fiber 2, the condensing lens 3 a, and the mirror 5 so that the laser light L 1 ′ reflected by the mirror 5 is irradiated on the light receiving surface of the wavelength conversion member 7. And the position of the wavelength conversion member 7 is defined.
  • a mechanism may be provided that allows the lens support member 4 to be moved to perform optical adjustment. Further, when the condenser lens 3a is fixed by other means, the lens support member 4 can be omitted.
  • the mirror 5 is a member that changes the optical path of the laser light L1 introduced from the light entrance ENT and transmitted through the condenser lens 3a toward the wavelength conversion member 7, and the laser light L1 is reflected by the reflecting surface of the mirror 5. It becomes reflected light L1 '.
  • the mirror 5 is disposed inside the cover member 8 at a position facing the optical entrance ENT so that the optical axis of the condenser lens 3 a passes through the reflective surface (substantially central portion) of the mirror 5.
  • the mirror support member 6 supports the mirror 5 at a position where the reflected light L1 ′ reflected by the mirror 5 is adjusted so that the desired position of the wavelength conversion member 7 is appropriately irradiated. In order to define the position, it is arranged on the surface of the inner surface opposite to the inner surface where the light entrance ENT of the cover member 8 to be described later exists.
  • the desired position is a position defined such that the laser beam L1 ′ reflected by the mirror 5 is irradiated on the light receiving surface (or the light emitting surface that emits fluorescence) of the wavelength conversion member 7.
  • the output end 2b of the optical fiber 2, the condensing lens 3a, and the mirror 5 are provided inside the cover member 8 so that the laser beam L1 ′ reflected by the mirror 5 is irradiated onto the light receiving surface of the wavelength conversion member 7. And the position of the wavelength conversion member 7 is defined.
  • a mechanism may be provided that allows the mirror support member 6 to be moved to perform optical adjustment.
  • the wavelength conversion member 7 emits the wavelength-converted light by receiving the laser light L1 (reflected light L1 ′) emitted from the laser element 1, and is a phosphor that emits fluorescence L4 when excited by the reflected light L1 ′.
  • Phosphor particles For example, the wavelength conversion member 7 is a member in which a phosphor is dispersed inside a sealing material or a member obtained by solidifying a phosphor.
  • a ceramic YAG phosphor is used as the phosphor of the wavelength conversion member 7, but the present invention is not limited to this.
  • the type of phosphor may be selected together with the wavelength of the laser light L1.
  • the scattered light of the fluorescence L4 and the laser light L1 is mixed and becomes white illumination light.
  • the sealing material of the wavelength conversion member 7 is, for example, a resin material such as a glass material (inorganic glass or organic-inorganic hybrid glass) or silicone resin. Low melting glass may be used as the glass material.
  • the sealing material is preferably highly transparent, and when the laser beam L1 has a high output, a material having high heat resistance is preferable.
  • the cover member 8 includes a light entrance ENT into which the laser light L1 is introduced, and a light extraction port EXT for taking out the fluorescence L4 emitted from the wavelength conversion member 7 to the outside, and the light of the fluorescence L4 of the wavelength conversion member 7 It covers at least a part of the emission side and the side surface side.
  • cover member 8 is not limited to the one that simply covers the wavelength conversion member 7 as described above, and may be a part of a housing that stores each component included in the light emitting device 100a.
  • the cover member 8 has functions such as prevention of leakage of laser light to the outside and protection of the wavelength conversion member 7.
  • the tip of the emission end 2b of the optical fiber 2 is attached in the vicinity of the optical entrance ENT.
  • the light inlet ENT is provided on one side surface of the cover member 8, and the light extraction port EXT is provided on the upper surface of the cover member 8.
  • a base plate 9 is provided on the bottom surface side of the cover member 8. The formation position of the light extraction port EXT on the upper surface of the cover member 8 and the size of the light extraction port EXT are set to an appropriate position and an appropriate size according to the light distribution of the fluorescence L4 emitted from the wavelength conversion member 7. Has been.
  • the optical entrance ENT is not necessarily hole-shaped (having a cavity), and it is sufficient if there is a connection (coupling) portion with the optical fiber 2.
  • an SMA (Sub Miniature Type A) connector can be used.
  • the light extraction port EXT is not necessarily hollow like the light entrance ENT, and a window glass or the like can be provided.
  • a straight line (or an optical path from the light entrance ENT to the mirror 5) passing through the light entrance ENT (substantially center) and the mirror 5 (substantially center of the reflecting surface). However, it is located between the wavelength conversion member 7 and the light extraction port EXT. That is, an imaginary straight line connecting the light entrance ENT (substantially central portion) and the mirror 5 (substantially central portion) is located between the wavelength conversion member 7 and the light extraction port EXT ( The light entrance ENT, the mirror 5, the wavelength conversion member 7, and the light extraction port EXT are arranged so as to cross the space between them.
  • the laser beam L1 that has passed through the condenser lens 3a intersects the fluorescence L4 emitted from the wavelength conversion member 7.
  • the cover member 8 does not have to be provided on the base plate 9 as shown in FIG. 1 or the like, and may have functions such as prevention of leakage of the laser beam to the outside and protection of the wavelength conversion member 7 as described above.
  • Various forms can be taken.
  • the light entrance ENT and the light extraction port EXT need not be provided in a form accompanying the cover member 8 as shown in FIG.
  • the position where the laser beam L1 incident on the condenser lens 3a is emitted to the space is functionally the light entrance ENT, and the position where the fluorescence L4 is emitted to the space outside the light emitting unit 10 is functionally the light extraction port. EXT.
  • the base plate 9 is a plate-like support member (substrate) on which the condenser lens 3a (the lens support member 4 that supports the condenser lens 3a) and the wavelength conversion member 7 are disposed.
  • the base plate 9 is a metal support member made of a material having high thermal conductivity such as metal (aluminum, stainless steel, copper or iron).
  • the base plate 9 has a surface (mounting surface) on which the wavelength conversion member 7 is placed, and the wavelength conversion member 7 is placed in contact with the placement surface. Therefore, the base plate 9 can efficiently conduct and dissipate heat generated by the wavelength conversion member 7.
  • the base plate 9 is not limited to one made of metal, and may be a member containing a substance (ceramics or the like) having high thermal conductivity other than metal.
  • the base plate 9 may be provided with heat radiating fins.
  • the radiating fins function as a cooling unit that cools the base plate 9.
  • the heat radiating fin has a plurality of heat radiating plates and increases the heat radiation efficiency by increasing the contact area with the atmosphere.
  • the cooling unit that cools the base plate 9 only needs to have a cooling (heat radiation) function.
  • a cooling mechanism such as a Peltier element can be attached instead of the heat radiation fin.
  • the laser element 1 is connected to a heat sink 11.
  • the heat sink 11 radiates the heat generated in the laser element 1 through the radiation fins 12 and the like. For this reason, it is preferable to use a metal material such as aluminum having high thermal conductivity for the heat sink 11.
  • the heat radiating fins 12 are provided in the heat sink 11 and function as a heat radiating mechanism for radiating the heat of the heat sink 11 into the air.
  • the heat radiating fins 12 have a plurality of heat radiating plates, and increase the heat radiation efficiency by increasing the contact area with the atmosphere. Note that, similarly to the heat sink 11, it is preferable to use a material having high thermal conductivity for the radiation fin 12.
  • the distance between the wavelength conversion member 7 and the light extraction port EXT is formed by making the space between the light extraction port EXT and the wavelength conversion member 7 a space in which no optical component or the like exists. Therefore, the light emitting device 100a can be downsized.
  • the space between the light extraction port EXT and the wavelength conversion member 7 is a space where no optical component or the like exists, and the distance between the wavelength conversion member 7 and the light extraction port EXT can be reduced. Therefore, the loss of the amount of light extracted from the light extraction port EXT to the outside can be reduced. Thereby, the loss of the light quantity taken out of the light emitting device 100a can be reduced.
  • the light emitting device 100a can be downsized, and the loss of the amount of light extracted outside the light emitting device 100a can be reduced.
  • the light emitting device 100b of the present modification is different from the light emitting device 100a described above in that the condenser lens 3b is provided in the vicinity of the light entrance ENT together with the emission end 2b of the optical fiber 2. According to the light emitting device 100b, a space in which no other optical components or the like exist is formed between the light entrance ENT and the mirror 5 (or the wavelength conversion member 7). The distance can be made smaller.
  • FIG. 2A is a top view showing a structure when the light emitting device 100a is viewed from the light extraction port EXT side (a top view with the ceiling portion of the cover member 8 removed to show the internal structure).
  • a straight line passing through the light entrance ENT (substantially central portion) and the mirror 5 (substantially central portion of the reflecting surface) is the light emission of the wavelength conversion member 7. It is preferable that it intersects with a perpendicular standing at any position on the side surface (or the light receiving surface) [passes right above the light emitting side surface (or the light receiving surface) (upper space)]. Thereby, the width W of the cover member 8 with respect to the direction perpendicular to the straight line when viewed from the light extraction port EXT side can be reduced.
  • FIG. 2 is a top view of the light emitting device of Comparative Example A.
  • Comparative Example A shown in FIG. 2B when the straight line is not directly above the light emitting side surface (or the light receiving surface) of the wavelength conversion member 7, it is viewed from the light extraction port EXT side.
  • the width Wref of the cover member 8 in the direction perpendicular to the straight line is larger than the width W described above.
  • FIG. 3A is a side view showing the structure of the light emitting device 100a.
  • a straight line passing through the light entrance ENT (substantially central part) and the mirror 5 (substantial central part of the reflecting surface) is on the light emitting side surface of the wavelength conversion member 7. It is preferable that it is substantially parallel to the surface.
  • the light emitting surface of the wavelength conversion member 7, the straight line, and the light extraction port EXT are substantially parallel to each other. Thereby, the distance h between the wavelength conversion member 7 and the light extraction port EXT can be further reduced as compared with the case where the straight line is not substantially parallel to the surface of the wavelength conversion member 7 on the light emission side.
  • FIG. 3B is a side view showing the structure of the light emitting device of Comparative Example B
  • FIG. 3C is a side view showing the structure of the light emitting device of Comparative Example C.
  • Comparative examples B and C differ from the light emitting device 100a in that they do not include a mirror.
  • the light emitting device 100a shown in FIG. 3A has a light extraction port from the light emitting side surface of the wavelength conversion member 7 which is a light emitting surface as compared with the light emitting device of Comparative Example B shown in FIG.
  • the distance h to EXT can be reduced. If the distance h can be reduced, the light emitted from the wavelength conversion member 7 can be effectively extracted outside and used without increasing the width d of the light extraction port EXT.
  • Comparative Example B since the distance href is greater than the distance h, the amount of light that can be extracted to the outside is reduced when the width d is the same as that of the light emitting device 100a in order to make the device size the same. Further, since the light emitting device 100a can reduce the size of the cover member 8, the device can be reduced in size, weight, and cost.
  • the distance href can be made smaller than the distance h.
  • the light distribution shape is not symmetric, it is used as a lighting device. There may be a gap.
  • FIG. 4A is a side view showing the structure of the light emitting device 200a.
  • the light emitting device 200a of the present embodiment is different from the light emitting device 100a described above in that it includes a projection lens 13a installed in the vicinity (upper part) of the light extraction port EXT.
  • the projection lens 13a projects the light emitted from the wavelength conversion member 7 to the outside. Thereby, the light distribution of the light extracted from the light extraction port EXT can be controlled by the projection lens 13a.
  • the light emitting device 200a As described in Embodiment 1 above, according to the light emitting device 200a, light emission from the wavelength conversion member 7 can be efficiently obtained with a small width W (see FIG. 2A). For this reason, the light can be effectively used even when the projection lens 13a for light distribution control is provided as in the present embodiment. Further, it is possible to reduce the size without forming an asymmetrical light distribution shape as in Comparative Example C described above. Further, since the width d of the light extraction port EXT can be reduced as described in the first embodiment, the size of the projection lens 13a can be reduced, and therefore the apparatus can be reduced in size, weight, and cost. . When sealing the inside of the cover member 8, there is also an advantage that the smaller projection lens 13a can be surely sealed.
  • the bottom surface of the projection lens 13a is kept substantially parallel to the light emission side surface of the wavelength conversion member 7, and the light extraction port EXT and the light emission side surface of the wavelength conversion member 7 The distance between can be reduced.
  • the distance between the wavelength conversion member 7 and the light extraction port EXT is formed by making the space between the light extraction port EXT and the wavelength conversion member 7 a space in which no optical component or the like exists. Therefore, the light emitting device 200a can be reduced in size.
  • the space between the light extraction port EXT and the wavelength conversion member 7 is a space where no optical component or the like exists, and the distance between the wavelength conversion member 7 and the light extraction port EXT can be reduced. Therefore, by reducing the loss of the amount of light extracted from the light extraction port EXT to the outside, light can be efficiently taken into the projection lens 13a without loss. Thereby, the loss of the light quantity taken out of the light emitting device 200a can be reduced. As described above, the light emitting device 200a can be reduced in size, and the loss of the amount of light extracted outside the light emitting device 200a can be reduced.
  • the light emitting device 200b of the present modification is different from the light emitting device 200a described above in that the projection lens 13b is fitted and held in the light extraction port EXT. According to the light emitting device 200b, the distance from the top of the projection lens 13b to the light emitting side surface of the wavelength conversion member 7 can be reduced by the amount that the projection lens 13b is fitted in the light extraction port EXT.
  • FIG. 5 is a side view showing the structure of the light emitting device 300.
  • the light emitting device 300 of the present embodiment is different from the light emitting device 100a described above in that it includes two laser elements 1, two light entrances ENT1 and ENT2, and two mirrors 5.
  • the light entrances ENT1 and ENT2 are provided on two side surfaces of the cover member 8 which are 90 ° different from each other.
  • the positional relationship between each light entrance, the mirror 5, the wavelength conversion member 7, and the light extraction port EXT is the same as that of the light emitting device 100a of the first embodiment.
  • the power for exciting the wavelength conversion member 7 can be increased, and light with higher luminance and higher luminous flux can be obtained. Further, the degree of freedom of the irradiation pattern to the wavelength conversion member 7 can be increased rather than increasing the power by using one set of laser light L1. By irradiating from a plurality of directions, the irradiation bias to the phosphor particles in the wavelength conversion member 7 is reduced, and the efficiency and reliability of the phosphor can be improved. It is also possible to control the light distribution pattern by controlling the overlapping pattern of the two light beams by the two laser beams L1. Further, when the power is increased by using one set of laser light L1, the mirror 5 is not sufficiently resistant and may be damaged. Such a situation can be prevented by using a plurality of sets of laser beams L1 as in the present embodiment.
  • the distance between the wavelength conversion member 7 and the light extraction port EXT is formed by making the space between the light extraction port EXT and the wavelength conversion member 7 a space where no optical component or the like exists.
  • the light emitting device 300 can be reduced in size.
  • the space between the light extraction port EXT and the wavelength conversion member 7 is a space where no optical component or the like exists, and the distance between the wavelength conversion member 7 and the light extraction port EXT can be reduced. Therefore, the loss of the amount of light extracted from the light extraction port EXT to the outside can be reduced. Thereby, the loss of the light quantity taken out of the light emitting device 300 can be reduced.
  • the light emitting device 300 can be reduced in size, and the loss of the amount of light extracted outside the light emitting device 300 can be reduced.
  • FIG. 6A is a side view showing the structure of the light emitting device 400.
  • 6B is a cross-sectional view of the light-emitting device 400 taken along the line AA ′ of FIG. 6A
  • FIG. 6C is a light-emitting device shown in FIG. 6A. It is sectional drawing of 400 BB 'cross section.
  • the light emitting device 400 of the present embodiment has the two light entrances ENT1 and ENT2 provided on the same side surface (same surface) of the cover member 8 in that the light emitting device 300 of Embodiment 3 described above. Is different.
  • the laser light L2 introduced from the light entrance ENT2 passes through the condenser lens 3a, and is then reflected by the reflecting surface of the mirror 115 (second optical path changing member) to be the first reflected light.
  • the first reflected light L3 that has become L3 and has passed through the upper space on the light emitting side surface of the wavelength conversion member 7 is further reflected by the reflecting surface of the mirror 5 (first optical path changing member) to be second reflected light L3 ′.
  • the light is incident on a desired position on the light emitting side surface of the wavelength conversion member 7.
  • a straight line connecting the mirror 115 (substantially central part) and the mirror 5 (substantial central part) is located between the light emitting side surface of the wavelength conversion member 7 and the light extraction port EXT. Therefore, the optical path of the laser beam L1 of the first embodiment has the same relationship.
  • the mirror support member 116 supports the mirror 115 at a position adjusted so that the second reflected light L3 ′ traveling through the mirror 115 and the mirror 5 is appropriately irradiated to a desired position of the wavelength conversion member 7.
  • the mirror 5 is disposed on the inner surface facing the inner surface where the mirror 5 exists.
  • the entire device can be reduced in size and handled easily.
  • the power for exciting the wavelength conversion member 7 can be increased, and light with higher luminance and higher luminous flux can be obtained.
  • the degree of freedom of the irradiation pattern to the wavelength conversion member 7 can be increased rather than increasing the power by using one set of laser light L1.
  • the irradiation bias to the phosphor particles in the wavelength conversion member 7 is reduced, and the efficiency and reliability of the phosphor can be improved.
  • the mirror 5 is not sufficiently resistant and may be damaged. Such a situation can be prevented by using a plurality of sets of laser beams L1 as in the present embodiment.
  • the number of laser elements 1 can be more than two sets, or laser elements having different wavelengths can be combined.
  • a plurality of wavelength conversion members 7 may be used.
  • the distance between the wavelength conversion member 7 and the light extraction port EXT is formed by making the space between the light extraction port EXT and the wavelength conversion member 7 a space where no optical component or the like exists. Therefore, the light emitting device 400 can be downsized.
  • the space between the light extraction port EXT and the wavelength conversion member 7 is a space where no optical component or the like exists, and the distance between the wavelength conversion member 7 and the light extraction port EXT can be reduced. Therefore, the loss of the amount of light extracted from the light extraction port EXT to the outside can be reduced. Thereby, the loss of the light quantity taken out of the light emitting device 400 can be reduced.
  • the light emitting device 400 can be reduced in size, and the loss of the amount of light extracted outside the light emitting device 400 can be reduced.
  • FIG. 7 is a side view showing the structure of the control system 500.
  • the light emitting unit 10 of the control system 500 of the present embodiment is arranged on the opposite side of the cover member 8 from the side where the light entrance ENT of the mirror 5 is present, and detects the laser light L1 transmitted through the mirror 5. It differs from the light emission part 10 of the light-emitting device 200a of Embodiment 2 mentioned above by the point provided with the part 15.
  • the mirror 5 can transmit a part of the laser beam L1.
  • a photodiode or the like can be used.
  • the detection unit support member 16 is a member that supports the detection unit 15 such that a part of the laser light L ⁇ b> 1 that passes through the mirror 5 enters the detection unit 15.
  • the control system 500 further includes a control unit 17 and a storage unit 18.
  • the control unit 17 includes, for example, a CPU (Central Process Unit), and includes a detection unit control unit 171 and a light source control unit 172.
  • the detection unit control unit 171 controls the operation of the detection unit 15, specifies the amount of laser light L 1 that has passed through the mirror 5 detected by the detection unit 15, and notifies the light source control unit 172 of the specification result.
  • the light source control unit 172 controls the operation of the laser element 1 and adjusts the amount of laser light emitted from the laser element 1 in accordance with the amount of light detected by the detection unit 15 (the above-described specific result). It is like that.
  • the storage unit 18 stores in advance information that defines the correspondence between the amount of laser light L1 that has passed through the mirror 5 detected by the detection unit 15 and the amount of laser light emitted from the laser element 1.
  • the control system 500 may include any of the light-emitting devices of Embodiments 1 to 4 described above.
  • the detection unit 15 can detect the light transmitted through the mirror 5 and adjust the amount of laser light emitted from the laser element 1 as necessary. As a result, the amount of light from the light emitting device can be adjusted as a result. Further, according to the control system 500, the detection unit 15 is disposed inside the cover member 8 on the side opposite to the side where the light entrance ENT of the mirror 5 is present, and therefore, based on the detected light amount. Thus, the alignment operation can be performed by finely adjusting the arrangement of the condenser lens 3a and the like. It is also possible to detect when the laser element 1 has failed.
  • FIG. 8 is a side view showing the structure of the control system 600.
  • the light emitting unit 10 of the control system 600 of the present embodiment drives the mirror 5 so as to change the incident position of the laser light L1 ′ whose optical path is changed by the mirror 5 with respect to the light emitting side surface of the wavelength conversion member 7. It differs from the light emission part 10 of the light-emitting device 200a of Embodiment 2 mentioned above by the point provided with the mirror drive part (drive part) 6a.
  • the mirror 5 is attached to the mirror support member 6 via a mirror driving unit 6a.
  • the mirror drive unit 6a is a member that can change the orientation of the mirror 5 so as to change the position of the laser light L1 ′ reflected by the mirror 5 that is irradiated on the light receiving surface of the wavelength conversion member 7. .
  • the control system 500 further includes a control unit 19 and a storage unit 18.
  • the control part 19 is comprised by CPU, for example, and is provided with the drive part control part 191.
  • the drive control unit 191 controls the operation of the mirror drive unit 6a.
  • the position of the laser beam L1 'reflected by the mirror 5 on the light receiving surface of the wavelength conversion member 7 can be changed by the control of the drive unit control unit 191.
  • the position of the laser beam L1 'reflected by the mirror 5 that is irradiated on the light receiving surface can be changed.
  • a linear light distribution can be realized in a pseudo manner without flickering by rotating at a frequency of 60 Hz.
  • a method of rotating the mirror 5 as a polygon mirror can also be adopted.
  • the storage unit 18 information necessary for the operation of the drive unit control unit 191 is recorded in advance.
  • the storage unit 18 has a correspondence relationship between the direction of the mirror 5 driven by the mirror driving unit 6a and the position of the laser light L1 ′ reflected by the mirror 5 that is irradiated on the light receiving surface of the wavelength conversion member 7. Defined information is stored in advance.
  • the control system 600 may include any of the light-emitting devices of Embodiments 1 to 4 described above.
  • the control system 600 may further include the detection unit 15, the detection unit support member 16, the detection unit control unit 171, and the light source control unit 172 of the control system 500 described above.
  • a wavelength conversion member (7) that receives a laser beam emitted from at least one laser element (1) and emits a wavelength-converted light, and the laser beam are introduced.
  • At least one optical path changing member (mirror 5) that changes the optical path of the laser light introduced from the mouth toward the wavelength conversion member, and a straight line passing through the optical entrance and the optical path changing member is It is the structure located between a wavelength conversion member and the said light extraction opening.
  • the space between the light extraction port and the wavelength conversion member is a space in which no optical component or the like exists, the distance between the wavelength conversion member and the light extraction port can be reduced. Can be miniaturized.
  • the space between the light extraction port and the wavelength conversion member can be a space where no optical components exist, and the distance between the wavelength conversion member and the light extraction port can be reduced.
  • the loss of the amount of light extracted from the mouth to the outside can be reduced. Thereby, the loss of the light quantity taken out of the apparatus can be reduced.
  • the straight line intersects with a perpendicular line standing at any position on the light emitting side surface of the wavelength conversion member.
  • vertical to the said straight line when it sees from the light extraction opening side can be made small.
  • the straight line is substantially parallel to a surface on the light emission side of the wavelength conversion member. According to the said structure, compared with the case where the said straight line is not substantially parallel with respect to the light emission side surface of a wavelength conversion member, the distance between a wavelength conversion member and a light extraction port can be made smaller.
  • the light-emitting device is the projection lens (13a) that is installed in the vicinity of the light extraction port and projects the light emitted from the wavelength conversion member to the outside in any of the aspects 1 to 3. May be provided. According to the above configuration, the light distribution of the light extracted from the light extraction port can be controlled by the projection lens.
  • the light emitting device may include a plurality of the laser elements, the light entrance, and the optical path changing member in any of the aspects 1 to 4.
  • a plurality of laser elements can be used, the power of the laser beam irradiated to the wavelength conversion member can be increased, and light with higher luminance and higher luminous flux can be obtained.
  • the degree of freedom of the irradiation pattern to the wavelength conversion member can be increased rather than increasing the power using one laser element.
  • the irradiation bias to the phosphor particles in the wavelength conversion member is reduced, and the light emission efficiency and reliability of the wavelength conversion member can be improved.
  • the light distribution pattern can be controlled by controlling the superposition pattern of the two light beams.
  • the optical path changing member may not be sufficiently resistant and may be damaged, but using a plurality of laser elements can prevent such a problem. it can.
  • a light emitting device includes the light entrance and the light extraction port according to the aspect 5 and a cover member that covers the wavelength conversion member. It may be provided on the same surface of the cover member. According to the above configuration, the laser beam from the plurality of laser elements is incident on the cover member from the same direction, whereby the entire apparatus can be easily downsized and handled.
  • a control system is a control system for controlling the light emitting device according to any one of Aspects 1 to 6, and is disposed on the opposite side of the optical path changing member from the side where the light entrance is present.
  • the detection part can detect the light which permeate
  • the detection unit since the detection unit is disposed inside the cover member on the side opposite to the side where the light entrance of the optical path changing member is present, the detection unit collects light based on the detected light amount.
  • the alignment operation can also be performed by finely adjusting the arrangement of the optical lens and the like. It is also possible to detect when a laser element has failed.
  • a control system is a control system for controlling the light emitting device according to any one of the above aspects 1 to 6, wherein the light of the wavelength conversion member of the laser light whose optical path is changed by the optical path changing member.
  • a drive unit (mirror drive unit 6a) for driving the optical path changing member and a drive unit control unit (191) for controlling the operation of the drive unit are provided so as to change the incident position with respect to the exit side surface. May be.
  • the present invention can be used for a light emitting device including a wavelength conversion member that emits light whose wavelength is converted by receiving laser light, a control system that controls the light emitting device, and the like. Specifically, it can be used for special lighting such as vehicle headlamps, projectors, and searchlights.

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  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Semiconductor Lasers (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

La présente invention permet de réduire la taille d'un dispositif et réduit au minimum les pertes dans la quantité de lumière sortant du dispositif. Ladite invention est pourvue d'un élément de conversion de longueur d'onde (7), d'un orifice d'entrée de lumière (ENT), d'un orifice de sortie de lumière (EXT), et d'un miroir (5) disposé à une position en regard de l'orifice d'entrée de lumière (ENT) de manière à modifier le trajet lumineux d'un faisceau laser introduit par l'orifice d'entrée de lumière (ENT). Une ligne droite passant par l'orifice d'entrée de lumière (ENT) et le miroir (5) est positionnée entre l'élément de conversion de longueur d'onde (7) et l'orifice de sortie de lumière (EXT).
PCT/JP2016/063997 2015-06-25 2016-05-11 Dispositif d'émission de lumière et système de commande WO2016208288A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013898A (ja) * 2010-06-30 2012-01-19 Jvc Kenwood Corp 光源装置および投射型表示装置
JP2012119173A (ja) * 2010-12-01 2012-06-21 Stanley Electric Co Ltd 車両用灯具
JP2013047091A (ja) * 2011-07-25 2013-03-07 Sharp Corp 照明装置および当該照明装置を備えた車両用前照灯
JP2015065144A (ja) * 2013-08-28 2015-04-09 シャープ株式会社 発光ユニット、発光装置、照明装置および車両用前照灯

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130208478A1 (en) * 2012-02-14 2013-08-15 Xiao Pie Tao Adaptor for converting laser devices to lighting

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012013898A (ja) * 2010-06-30 2012-01-19 Jvc Kenwood Corp 光源装置および投射型表示装置
JP2012119173A (ja) * 2010-12-01 2012-06-21 Stanley Electric Co Ltd 車両用灯具
JP2013047091A (ja) * 2011-07-25 2013-03-07 Sharp Corp 照明装置および当該照明装置を備えた車両用前照灯
JP2015065144A (ja) * 2013-08-28 2015-04-09 シャープ株式会社 発光ユニット、発光装置、照明装置および車両用前照灯

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