WO2019245030A1 - 車両用灯具の光源ユニット及び車両用灯具 - Google Patents
車両用灯具の光源ユニット及び車両用灯具 Download PDFInfo
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- WO2019245030A1 WO2019245030A1 PCT/JP2019/024710 JP2019024710W WO2019245030A1 WO 2019245030 A1 WO2019245030 A1 WO 2019245030A1 JP 2019024710 W JP2019024710 W JP 2019024710W WO 2019245030 A1 WO2019245030 A1 WO 2019245030A1
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- Prior art keywords
- light
- light source
- emitting layer
- source unit
- light emitting
- Prior art date
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Images
Classifications
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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
- 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
- F21S43/255—Filters
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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/14—Light emitting diodes [LED]
- F21S43/145—Surface emitters, e.g. organic light emitting diodes [OLED]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
- F21S43/10—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source
- F21S43/13—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by the light source characterised by the type of light source
- F21S43/16—Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
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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
- 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
- F21S43/236—Light guides characterised by the shape of the light guide
- F21S43/239—Light guides characterised by the shape of the light guide plate-shaped
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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
- 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
- F21S43/242—Light guides characterised by the emission area
- F21S43/245—Light guides characterised by the emission area emitting light from one or more of its major surfaces
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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
- 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
- F21S43/247—Light guides with a single light source being coupled into the light guide
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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
- 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
- F21S43/26—Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255
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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
- F21S43/00—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights
- F21S43/30—Signalling devices specially adapted for vehicle exteriors, e.g. brake lamps, direction indicator lights or reversing lights characterised by reflectors
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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
- F21S45/00—Arrangements within vehicle lighting devices specially adapted for vehicle exteriors, for purposes other than emission or distribution of light
- F21S45/70—Prevention of harmful light leakage
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- 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
- F21V7/00—Reflectors for light sources
- F21V7/22—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors
- F21V7/24—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material
- F21V7/26—Reflectors for light sources characterised by materials, surface treatments or coatings, e.g. dichroic reflectors characterised by the material the material comprising photoluminescent substances
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- 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
- F21V9/30—Elements containing photoluminescent material distinct from or spaced from the light source
- F21V9/38—Combination of two or more photoluminescent elements of different materials
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2103/00—Exterior vehicle lighting devices for signalling purposes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21W—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21W2107/00—Use or application of lighting devices on or in particular types of vehicles
- F21W2107/10—Use or application of lighting devices on or in particular types of vehicles for land vehicles
-
- 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]
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- 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]
- F21Y2115/15—Organic light-emitting diodes [OLED]
Definitions
- the present invention relates to a light source unit of a vehicle lamp and a vehicle lamp.
- a vehicular lamp having a signal light function such as a tail lamp
- a light source a plate-shaped light guide lens that guides light from the light source
- a lens that emits light guided by the light guide lens to the front of the vehicle.
- a configuration of a light source unit including a member see, for example, Patent Document 1.
- organic light-emitting diodes have a structure in which electrodes, organic layers, and electrodes are stacked on a substrate, and when current flows between the electrodes, electric degradation occurs when electroluminescence occurs. There are issues. Further, the organic light emitting diode has a problem that the manufacturing cost is high. Therefore, there is a demand for a light source unit that can perform surface light emission while ensuring the reliability of the light source and that can reduce costs.
- the present invention has been made in view of the above, and provides a light source unit of a vehicle lamp and a vehicle lamp capable of performing surface light emission while securing the reliability of a light source and capable of suppressing cost.
- the purpose is to do.
- a light source unit for a vehicle lamp includes a light source that emits excitation light, a light emitting layer that emits light generated by irradiation with the excitation light, and a light that has a holding member that holds the light emitting layer.
- the light emitting layer may be formed using an organic material.
- the light generating unit may include a sealing unit that transmits the excitation light and the generated light and seals the light emitting layer.
- the holding member transmits the excitation light, and has a plate shape having flat portions on the front and back, and the light emitting layer is formed of the flat portions on the front and back of the holding member.
- the light generation unit may be formed on at least one of the light generation units, and the plane unit on which the light emitting layer is formed may be disposed on a front side in a vehicle mounted state.
- the holding member may be capable of transmitting the generated light, and the light emitting layers may be formed on both the front and back flat portions of the holding member.
- the holding member has a side surface connecting the flat portions on the front and back, and the light source has an emission surface for emitting the excitation light facing the side surface. It may be arranged.
- the holding member has a plurality of the side surfaces, and the side surface different from the side surface facing the emission surface among the plurality of the side surfaces diffuses the excitation light. It may have a light diffusion unit for causing the light to diffuse.
- the holding member may transmit the generated light
- the light generation unit may include a plurality of the holding members arranged such that the flat portions face each other. Good.
- the light emitting layers provided in the plurality of light generating units may be arranged in regions different from each other when viewed from the front.
- the light emitting layers provided in the plurality of light generation units may have a ring shape having different diameters from each other when viewed from the front.
- the light emitting layer may emit red light as the generated light.
- the lens member may transmit red light and absorb light different from red light.
- a vehicle lamp according to the present invention includes the light source unit of the above-described vehicle lamp.
- a light source unit of a vehicle lamp includes a light source that emits excitation light, a light emitting layer that emits generated light when the excitation light is irradiated, and a rear side in a vehicle mounted state with respect to the light emitting layer.
- a reflection layer that reflects the generated light in a frontal direction in a vehicle mounted state, and is disposed at a position on the front side in the vehicle mounted state with respect to the light emitting layer and sandwiches the light emitting layer between the reflective layer and the light emitting layer.
- the light emitting layer may be formed using an organic material.
- the light emitting layer may be formed in an annular shape when viewed from the front.
- the light source may be arranged below the light emitting layer in a state where the light emitting layer is mounted on the vehicle.
- the reflection layer may be curved in a state protruding in the rear direction.
- the light emitting layer may emit red light as the generated light.
- the lens member may transmit red light and absorb light different from red light.
- a vehicle lamp according to the present invention includes the light source unit of the above-described vehicle lamp.
- a light source unit of a vehicle lamp and a vehicle lamp capable of performing surface light emission while securing the reliability of the light source and capable of suppressing cost.
- FIG. 1 is a side view showing an example of a vehicular lamp according to the present embodiment.
- FIG. 2 is a perspective view illustrating an example of the light source unit.
- FIG. 3 is a diagram illustrating an example of a case where the light generation unit is viewed from the front.
- FIG. 4 is a diagram illustrating an example of the operation of the vehicular lamp.
- FIG. 5 is a side view illustrating an example of a light source unit according to a modification.
- FIG. 6 is an exploded perspective view illustrating an example of a light source unit according to a modification.
- FIG. 7 is a side view illustrating an example of a light source unit according to a modification.
- FIG. 8 is an exploded perspective view illustrating an example of a light source unit according to a modification.
- FIG. 1 is a side view showing an example of a vehicular lamp according to the present embodiment.
- FIG. 2 is a perspective view illustrating an example of the light source unit.
- FIG. 3 is a diagram
- FIG. 9 is a side view illustrating an example of the light source unit.
- FIG. 10 is a diagram illustrating an example when the light source unit is viewed from the front.
- FIG. 11 is a diagram illustrating an example of a vehicular lamp according to a modification.
- FIG. 12 is a side view illustrating an example of a vehicular lamp according to another embodiment.
- FIG. 13 is a front view showing an example of the light source unit.
- FIG. 14 is a diagram illustrating an example of the operation of the vehicular lamp.
- FIG. 15 is a diagram illustrating an example when the light source unit is viewed from the front.
- FIG. 16 is a diagram illustrating an example of a vehicular lamp according to a modification.
- the front, rear, up, down, left, and right directions are directions in a vehicle mounted state in which the light source unit of the vehicle lamp is mounted on the vehicle, and are directions when the traveling direction of the vehicle is viewed from the driver's seat. Show.
- the vertical direction is parallel to the vertical direction
- the horizontal direction is horizontal.
- the front direction and the rear direction the direction in which light is emitted from the light source unit of the vehicle lamp is defined as the front direction, and the direction opposite to the front direction is defined as the rear direction.
- FIG. 1 is a side view showing an example of a vehicle lamp 100 according to the present embodiment.
- the vehicle lamp 100 shown in FIG. 1 is a signal lamp such as a tail lamp. Therefore, in the present embodiment, the front direction is the rear direction (rear), and the rear direction is the front direction (front).
- the vehicular lamp 100 includes a light source unit U1 including a light source unit 10, a light generation unit 20, and a lens member 30, and an inner panel 40. Further, the vehicle lamp 100 includes a lamp housing and a lamp lens (not shown) that accommodate the light source unit U1 and the inner panel 40.
- FIG. 2 is a perspective view showing an example of the light source unit U1. As shown in FIGS. 1 and 2, the light source unit U1 has a light source unit 10 and a light generation unit 20.
- the light source unit 10 includes a light source 11, a support substrate 12, and a heat sink 13.
- the light source 11 is a semiconductor light source such as an LED, an OEL, and an OLED (organic EL).
- the light source 11 is disposed, for example, below the light generation unit 20, and the light emitting surface 11 a is directed toward the light generation unit 20 (upward).
- the light source 11 emits light from the light emitting surface 11a so as to form a Lambertian distribution.
- the light source 11 emits, for example, blue light from the light emitting surface 11a as excitation light.
- the light source 11 is not limited to a light source that emits blue light, and can emit light (violet light, ultraviolet light, or the like) having a shorter wavelength than the wavelength of light generated by the light generation unit 20 described later. Light source can be used.
- the support substrate 12 supports the light source 11.
- the support substrate 12 is supported by the heat sink 13.
- the heat sink 13 is held, for example, by a bracket (not shown).
- the light generation unit 20 includes a holding member 21, a light emitting layer 22, and a sealing unit 23.
- the holding member 21 is supported independently of the light source unit 10 by a bracket or the like (not shown). Since the holding member 21 is provided independently of the light source unit 10, the degree of freedom of the layout of the light source unit 10 and the light generation unit 20 is increased. Therefore, the arrangement of the light source unit 10 and the light generation unit 20 can be flexibly set according to the design contents.
- the holding member 21 is capable of transmitting the excitation light emitted from the light source 11.
- the holding member 21 transmits the excitation light, guides the excitation light inside the holding member 21, and can irradiate the entire surface of the light emitting layer 22 described later.
- the holding member 21 has, for example, a rectangular plate shape, and can transmit generated light emitted from a light emitting layer 22 described later.
- Such a holding member 21 may be, for example, a rigid substrate formed of glass or the like, or a flexible substrate formed of an acrylic resin, a thermoplastic material, or the like.
- the holding member 21 has flat portions 21a and 21b on the front and back. The flat portion 21a is arranged rearward (frontward).
- the flat part 21b is arranged toward the front (backward direction).
- the holding member 21 has four side surfaces that connect the flat portion 21a and the flat portion 21b.
- the side portion directed downward has an incident surface 21f arranged to face the light emitting surface 11a.
- the holding member 21 internally guides the excitation light incident from the incident surface 21f.
- the light emitting layer 22 is held by the holding member 21.
- the light emitting layer 22 emits generated light when excited by the excitation light from the light source 11.
- the light emitting layer 22 is held on both the flat portions 21 a and 21 b of the holding member 21.
- the light emitting layer 22 provided on the flat portion 21a is referred to as a light emitting layer 22a and the flat portion 21b Is referred to as a light emitting layer 22b.
- Each light emitting layer 22 is formed in a thin film shape by performing a film forming process on the plane portions 21a and 21b, for example.
- the light emitting layer 22 is transparent when no excitation light is irradiated.
- a light emitting layer 22 an organic material or the like obtained by doping a host material such as polyvinyl carbazole with a red phosphorescent material such as acetylacetone by about 5% is used. In this case, the light emitting layer 22 emits red light as generated light. Note that the host material and the dope material are not limited to the above materials.
- the light emitting layer 22 may be made of an inorganic material such as YAG (Yttrium Aluminum Aluminum Garnet).
- FIG. 3 is a diagram illustrating an example of a case where the light generation unit 20 is viewed from the front.
- the light emitting layers 22a and 22b have, for example, a rectangular shape, but are not limited thereto.
- the light emitting layers 22a and 22b may have a shape corresponding to, for example, the shape of the tail lamp in a front view.
- the light-emitting layers 22a and 22b form the light-emitting region 22R when viewed from the front with the above-described size, shape, and arrangement.
- the light emitting region 22R is defined by, for example, the outer periphery of the light emitting layers 22a and 22b. Part of the red light generated in the light emitting layer 22a is emitted in the front direction. A part of the red light generated in the light emitting layer 22b passes through the holding member 21 and the light emitting layer 22a and is emitted in the front direction. Therefore, when the light emitting layers 22a and 22b emit red light, the red light is emitted from the light emitting region 22R in a planar manner in the front direction.
- the sealing portion 23 transmits the excitation light and the red light and seals the light emitting layer 22.
- the sealing portion 23 may be, for example, a rigid substrate formed of, for example, glass, an epoxy resin, or the like, like the holding member 21, or may be a flexible substrate formed of, for example, an acrylic resin, a thermoplastic plastic material, or the like. It may be a substrate.
- the lens member 30 is disposed in front of the light generation unit 20.
- the lens member 30 has an entrance surface 31 and an exit surface 32.
- Red light which is generated light from the light generation unit 20, is incident on the incident surface 31.
- the light exit surface 32 emits light incident on the light incident surface 31 in the front direction.
- the lens member 30 transmits red light and absorbs light different from red light. Therefore, the excitation light component included in the external light is absorbed by the lens member 30.
- the inner panel 40 holds the lens member 30.
- FIG. 4 is a diagram illustrating an example of the operation of the vehicle lamp 100.
- a part of the excitation light Lb emitted in a Lambertian shape from the light emitting surface 11a is directly applied to the light emitting layers 22a and 22b.
- a part of the excitation light Lb is incident on the holding member 21 from the incident surface 21f, is guided by the holding member 21, and is emitted to the light emitting layers 22a and 22b.
- the light emitting layer 22a When the light emitting layer 22a is irradiated with the excitation light Lb, the light emitting layer 22a is excited to emit red light L1. Part of the red light L1 generated in the light emitting layer 22a passes through the sealing portion 23a and is emitted backward (in the front direction).
- the light emitting layer 22b When the light emitting layer 22b is irradiated with the excitation light Lb, the light emitting layer 22b is excited to emit red light L2. Part of the red light L2 generated in the light emitting layer 22b passes through the holding member 21, the light emitting layer 22a, and the sealing portion 23a and is emitted backward (in the front direction).
- the red lights L1 and L2 generated in the light emitting layers 22a and 22b are emitted from the light emitting area 22R in the front direction as planar light.
- the red lights L1 and L2 are incident on the incident surface 31 of the lens member 30, are emitted from the emission surface 32 of the lens member 30 in the front direction, and are emitted as a tail lamp pattern, for example.
- the excitation light Lb is not emitted from the light source 11, so that no red light L1, L2 is generated from the light emitting layers 22a, 22b.
- the light emitting layers 22a and 22b are made of an organic material, and are transparent when the excitation light Lb is not irradiated. Therefore, the observer can be made to recognize that the light emitting layers 22a and 22b do not exist inside the lens member 30. Further, since the lens member 30 transmits red light and absorbs light different from red light, for example, the excitation light component Lx included in external light is absorbed by the lens member 30. For this reason, light emission of the light emitting layer 22 when the light source 11 is not turned on is suppressed.
- the light source unit U1 includes the light source 11 that emits excitation light, the light emitting layer 22 that emits red light that is generated light when irradiated with excitation light, and the light emitting layer 22.
- the light generating unit 20 includes a holding member 21 for holding the light, and a lens member 30 that irradiates generated light from the light emitting layer 22 in a front direction in a vehicle mounted state.
- the light emitting layer 22 emits red light as generated light by the irradiation of the excitation light from the light source 11, there is no electrical degradation as in the organic light emitting diode.
- This makes it possible to provide the vehicle lamp 100 capable of performing surface light emission while ensuring the reliability of the light source 11 at a low cost.
- the light source 11 is disposed separately from the holding member 21, the degree of freedom of the layout of the light source unit 10 and the light generation unit 20 is increased. Therefore, the arrangement of the light source unit 10 and the light generation unit 20 can be flexibly set according to the design contents.
- the light emitting layer 22 is formed using an organic material. As a result, surface light emission can be easily performed, and a transparent state can be maintained in a state where irradiation with excitation light is not performed.
- the light generation unit 20 may include the sealing unit 23 that transmits the excitation light and the red light and seals the light emitting layer 22. Thereby, the deterioration of the light emitting layer 22 can be suppressed, and the life can be extended.
- the holding member 21 has a plate shape having flat portions 21a and 21b on the front and back, and the light emitting layer 22 includes at least one of the flat portions 21a and 21b on the front and back of the holding member 21.
- the flat part 21a on which the light emitting layer 22 is formed is disposed on the front side. Thereby, the red light generated in the light emitting layer 22 can be efficiently emitted in the front direction.
- the holding member 21 is capable of transmitting red light
- the light emitting layers 22 are formed on both the front and back flat portions 21a and 21b of the holding member 21. Therefore, the light emitting layer 22 can be efficiently arranged and a large amount of light can be secured.
- the holding member 21 has a side surface connecting the front and back flat portions 21a and 21b, and the light source 11 has a light emitting surface 11a for emitting excitation light facing the side surface. Placed. Accordingly, the excitation light can be incident from the side surface of the holding member 21 to guide the inside of the holding member 21 to irradiate the light emitting layer 22 with the excitation light. Therefore, the light emitting layer 22 can be efficiently irradiated with the excitation light.
- the light emitting layer 22 emits red light as generated light. This makes it possible to easily obtain red light emitted in a planar manner for a tail lamp or the like.
- the lens member 30 transmits red light and absorbs light different from red light. Thereby, the excitation light component included in the external light can be absorbed by the lens member 30. Therefore, it is possible to prevent the light emitting layer 22 from emitting light when the light source 11 is not turned on.
- the vehicle lamp 100 includes the above-described light source unit U1. According to this configuration, it is possible to perform surface light emission while ensuring the reliability of the light source 11 and to provide the light source unit U1 capable of suppressing costs, so that a vehicle capable of realizing stable surface light emission at low cost can be realized.
- the lighting fixture 100 is obtained.
- FIG. 5 is a side view showing an example of a light source unit U2 according to a modification.
- the light source unit U2 illustrated in FIG. 5 includes the light source unit 10, the light generation unit 120, and a lens member (not illustrated).
- the light source unit 10 and the lens member have the same configuration as the above-described embodiment.
- the dimension (thickness) of the holding member 121 of the light generation unit 120 in the front-rear direction is formed to be thicker than the holding member 21 in the present embodiment. In this configuration, the excitation light from the light source 11 easily enters the holding member 121, and the amount of the excitation light guided to the holding member 121 and applied to the light emitting layers 22 (22a, 22b) can be increased. .
- the holding member 121 has a configuration in which the light diffusion portion 121s is provided on a side surface different from the side surface having the incident surface 121f.
- the light diffusing unit 121s diffuses the excitation light that has entered the inside of the holding member 121 into the inside of the holding member 121.
- a light diffusion unit 121s for example, a prism or the like that internally reflects the excitation light in the holding member 221 can be used. Accordingly, the entire surface of the light emitting layer 22 (22a, 22b) can be uniformly irradiated with the excitation light, so that red light can be efficiently extracted from the light emitting layer 22.
- FIG. 6 is an exploded perspective view showing an example of a light source unit U3 according to a modification.
- the light source unit U3 illustrated in FIG. 6 includes the light source unit 10, the light generation unit 220, and a lens member (not illustrated).
- the light source unit 10 and the lens member have the same configuration as the light source unit U1.
- the holding member 221 of the light generation unit 220 is formed in a rectangular parallelepiped box shape by, for example, glass and the like, and the light emitting layer 222 is accommodated therein.
- the holding member 221 can transmit the excitation light emitted from the light source 11 and the red light generated in the light emitting layer 222.
- the light emitting layer 222 is provided in a state where a host material such as polyvinyl carbazole and a red phosphorescent material such as acetylacetone are dissolved in a solvent such as dichloroethane.
- the light emitting layer 222 is not limited to the above materials, and another material may be provided.
- the light emitting layer 222 is provided in a three-dimensional shape having dimensions in the up-down direction, the left-right direction, and the front-back direction.
- the light-emitting layer 222 is arranged such that, for example, when viewed from above, the center of the light-emitting layer 222 in the front-rear direction and the left-right direction matches the center of the light-emitting surface 11a of the light source 11 in the front-rear direction and the left-right direction. With this arrangement, the light emitting layer 222 is efficiently irradiated with the excitation light emitted from the light source 11 in a Lambertian state.
- a plate-shaped sealing portion 223 is mounted on the upper surface 221a of the holding member 221.
- the sealing portion 223 is adhered to the upper surface 221a of the holding member 221 by, for example, epoxy resin or the like.
- the light emitting layer 222 is sealed inside the holding member 221 by the sealing portion 223.
- the Lambertian excitation light is transmitted through the holding member 221 to irradiate the light emitting layer 222.
- the light emitting layer 222 is irradiated with the excitation light, the light emitting layer 222 is excited to generate red light.
- red light is emitted in a planar manner in a light emitting region 222R defined by the outer peripheral surface of the light emitting layer 222.
- red light is generated in a three-dimensional region in the light emitting layer 222, so that a sufficient amount of red light can be secured.
- FIG. 7 is a side view showing an example of a light source unit U4 according to a modification.
- the light source unit U4 illustrated in FIG. 7 includes the light source unit 10, the light generation unit 320, and a lens member (not illustrated).
- the light source unit 10 and the lens member have the same configuration as the light source unit U1.
- the light generation unit 320 includes a plurality of light generation units 20 described in the present embodiment that are overlapped in the front-rear direction (front-back direction). In the example illustrated in FIG. 7, three light generation units 20 are arranged.
- the present invention is not limited to this, and two or four or more light generation units 20 may be arranged.
- the plurality of light generation units 20 are arranged in the front-back direction (front-back direction), the light-emitting layers 22 (22a, 22b) can be efficiently irradiated with the excitation light, so Red light can be efficiently extracted from the layer 22.
- FIG. 8 is an exploded perspective view showing an example of a light source unit U5 according to a modification.
- FIG. 8 shows a state in which the configuration of the light generation unit 420 is disassembled.
- FIG. 9 is a side view illustrating an example of the light source unit U5.
- the light source unit U5 illustrated in FIGS. 8 and 9 includes the light source unit 10, the light generation unit 420, and a lens member (not illustrated).
- the light source unit 10 and the lens member have the same configuration as the light source unit U1.
- the light generation unit 420 includes a first light generation unit 421, a second light generation unit 422, and a third light generation unit 423 stacked in the front-back direction (front-back direction). Is arranged.
- the first light generation unit 421 has a holding member 424 and a light emitting layer 425.
- the second light generation unit 422 includes a holding member 426 and a light emitting layer 427.
- the third light generation unit 423 includes a holding member 428 and a light emitting layer 429.
- the holding members 424, 426, and 428 have the same configuration as the holding member 21 described in the above embodiment.
- the light emitting layer 425 is formed in a thin film shape on the flat portion 424a of the holding member 424.
- the light emitting layer 427 is formed as a thin film on the flat portion 426 a of the holding member 426.
- the light emitting layer 429 is formed in a thin film shape on the flat portion 428a of the holding member 428.
- the holding members 424, 426, and 428 are bonded with, for example, epoxy resin or the like. Specifically, the flat portion 424a of the holding member 424 and the flat portion 426b of the holding member 426 are attached to each other. Further, the flat portion 426a of the holding member 426 and the flat portion 428b of the holding member 428 are bonded to each other.
- the light emitting layer 425 sandwiched between the holding members 424 and 424 and the light emitting layer 427 sandwiched between the holding members 426 and 428 are sealed with epoxy resin. Further, the light emitting layer 429 provided on the flat portion 428 a of the holding member 428 is sealed by the sealing portion 430.
- the sealing section 430 can have the same configuration as the sealing section 23 in the above embodiment.
- FIG. 10 is a diagram illustrating an example of a case where the light source unit U6 is viewed from the front.
- the light emitting layer 425 is formed in a rectangular ring shape when viewed from the front.
- the light emitting layer 427 is formed in a rectangular ring shape having a smaller diameter than the light emitting layer 425 in a front view, and is disposed inside the light emitting layer 425.
- the light emitting layer 429 is formed in a rectangular ring shape smaller in diameter than the light emitting layer 427 in a front view, and is disposed inside the light emitting layer 427.
- the light emitting layers 425, 427, and 429 are annular shapes having different diameters from each other, and are arranged in regions different from each other.
- the shape of the light-emitting layers 425, 427, and 429 in a front view is not limited to a rectangular ring, and may be another shape.
- the light emitting layer 425 forming the outer light emitting region 425R is disposed on the rearmost side, and the light emitting layer 427 forming the middle light emitting region 427R is positioned in the front-back direction (front-back direction).
- the light emitting layer 429 constituting the inner light emitting region 429R is disposed on the most front side.
- the red light from the outer light-emitting region 425R emits on the back side
- the red light from the middle light-emitting region 427R emits in the middle
- the red light from the inner light-emitting region 429R is closest to the front. It can be recognized that light is emitted on the side.
- FIG. 11 is a diagram showing an example of a vehicle lamp 600 according to a modification.
- the vehicular lamp 600 includes a light source unit U1 having a light source unit 10, a light generation unit 20, and a lens member 30, and a reflector 60.
- Each configuration of the light source unit 10, the light generation unit 20, and the lens member 30 is the same as in the above embodiment.
- the light source unit U1 any one of the light source units U2 to U6 described above may be provided.
- the light source unit 10 and the light generation unit 20 are provided on the heat sink 14, and the reflector 60 is arranged between the light source unit 10 and the light generation unit 20.
- the reflector 60 has a reflection surface 61 that reflects the excitation light from the light source 11 toward the light generation unit 20.
- the reflector 60 the light emitting layer 22 can be efficiently irradiated with light.
- FIG. 12 is a side view showing an example of a vehicle lamp 700 according to another embodiment.
- the vehicle lamp 700 shown in FIG. 12 is a signal lamp such as a tail lamp. Therefore, in the present embodiment, the rear is the front direction and the front is the rear direction.
- the vehicular lamp 700 includes a light source unit U7 including a light source unit 10, a light generation unit 720, and a lens member 30, and an inner panel 40. Further, the vehicle lamp 700 includes a lamp housing and a lamp lens (not shown) that accommodate the light source unit U7 and the inner panel 40.
- the light source unit 10 includes a light source 11, a support substrate 12, and a heat sink 13.
- the light source 11 is a semiconductor light source such as an LED, an OEL, and an OLED (organic EL).
- the light source 11 is disposed, for example, below the light generation unit 720, and the light emitting surface 11a is directed to the light generation unit 720 side (upward).
- the light source 11 emits light from the light emitting surface 11a so as to form a Lambertian distribution.
- the light source 11 emits, for example, blue light from the light emitting surface 11a as excitation light.
- the light source 11 is not limited to a light source that emits blue light, and can emit light (violet light, ultraviolet light, or the like) having a shorter wavelength than the wavelength of the generated light generated in the light generation unit 720 described later. Light source can be used.
- the support substrate 12 supports the light source 11.
- the support substrate 12 is supported by the heat sink 13.
- the heat sink 13 is held, for example, by a bracket (not shown).
- the light generation unit 720 includes holding members 721 and 722, a light emitting layer 723, a reflective layer 724, and a transflective layer 725.
- the holding members 721 and 722 are supported independently of the light source unit 10 by a bracket (not shown) or the like. Since the holding members 721 and 722 are provided independently of the light source unit 10, the degree of freedom of the layout of the light source unit 10 and the light generation unit 720 is increased. Therefore, the arrangement of the light source unit 10 and the light generation unit 720 can be flexibly set according to the design contents.
- the holding members 721 and 722 can transmit the excitation light emitted from the light source 11.
- the holding members 721 and 722 transmit the excitation light, thereby guiding the excitation light inside the holding members 721 and 722 and irradiating the entire surface of a light emitting layer 723 described later.
- the holding members 721 and 722 are, for example, plate-shaped, and can transmit generated light emitted from a light-emitting layer 723 described later.
- a rigid substrate formed of glass or the like, or a flexible substrate formed of an acrylic resin, a thermoplastic plastic material, or the like may be used.
- the holding member 721 has a curved portion 721a and a flat portion 721b.
- the curved portion 721a is arranged forward (toward the back).
- the bending portion 721a is bent in a state protruding forward (back side).
- the curved portion 721a can have a shape in which the amount of protrusion increases from each end in the vertical and horizontal directions toward the center.
- the shape of the curved portion 721a is not limited to this.
- the curved portion 721a may have a shape in which the amount of protrusion increases in the vertical and horizontal directions from both ends to the center.
- the flat portion 721b is arranged rearward (front direction).
- the holding member 721 has four side surfaces that connect the curved portion 721a and the flat portion 721b. One of the four side surfaces that faces downward has an incident surface 721f that is arranged to face the light emitting surface 11a.
- the holding member 721 internally guides the excitation light incident from the incident surface 721f.
- the holding member 722 is disposed on the front side with respect to the holding member 721.
- the holding member 722 has flat portions 722a and 722b.
- the flat part 722a is arranged forward (toward the back).
- the flat portion 722a is arranged to face the flat portion 721b of the holding member 721.
- the flat portion 722b is disposed rearward (frontward).
- the holding member 722 has four side surfaces that connect the flat portion 722a and the flat portion 722b.
- One of the four side surfaces that faces downward has an incident surface 722f that is arranged to face the light emitting surface 11a.
- the holding member 722 guides the excitation light incident from the incident surface 722f inside.
- the light-emitting layer 723 emits generated light when excited by the excitation light from the light source 11. Note that the light-emitting layer 723 is transparent when no excitation light is irradiated.
- the light emitting layer 723 is held, for example, in a state sandwiched between the flat portion 721b of the holding member 721 and the flat portion 722a of the holding member 722.
- the light-emitting layer 723 is formed in a thin film shape by performing a film formation process on the planar portion 721b or the planar portion 722a. Therefore, part of the red light generated in the light emitting layer 723 is emitted forward, and part of the red light is emitted backward.
- FIG. 13 is a front view showing an example of the light source unit U7.
- the light emitting layer 723 when viewed from the rear, is formed in a rectangular ring shape along the outer periphery of the holding members 721, 722, and has an opening 723a at the center. Note that the light-emitting layer 723 is not limited to this shape.
- the light emitting layer 723 for example, an organic material in which a red phosphorescent material such as acetylacetone is doped by about 5% with respect to a host material such as polyvinyl carbazole is used. In this case, the light emitting layer 723 emits red light as generated light.
- the host material and the dope material are not limited to the above materials.
- an inorganic material such as YAG (Yttrium Aluminum Aluminum Garnet) may be used for the light emitting layer 723.
- the reflective layer 724 is disposed on the front side (back side) with respect to the light emitting layer 723.
- the reflection layer 724 reflects the generated light generated in the light emitting layer 723 backward (in the front direction).
- the reflection layer 724 is formed in a thin film shape along a curved portion 721a of the holding member 721, for example, using a material such as a metal. Therefore, the reflective layer 724 has a shape that is curved in a state of protruding forward (backward direction) along the curved portion 721a.
- the reflective layer 724 has such a shape that the amount of protrusion increases from the ends in the vertical and horizontal directions toward the center.
- the reflection layer 724 similarly has one of the vertical and horizontal directions from both ends. The shape is such that the amount of protrusion increases toward the center.
- the transflective layer 725 is disposed on the front side with respect to the light emitting layer 723.
- the transflective layer 725 is arranged at a position sandwiching the light emitting layer 723 between the transflective layer 725 and the reflective layer 724.
- the transflective layer 725 transmits part of the generated light and reflects part of the generated light forward (backward).
- the transflective layer 725 is formed in a thin film shape on the flat portion 722b of the holding member 722, for example, using a material such as a metal. Therefore, the transflective layer 725 is formed in a planar shape.
- the sealing portion 726 is disposed between the periphery of the flat portion 721b of the holding member 721 and the periphery of the flat portion 722a of the holding member 722, and seals the light emitting layer 723.
- the sealing portion 726 may be a rigid substrate formed of, for example, glass, an epoxy resin, or the like, or may be formed using an acrylic resin, a thermoplastic material, or the like, like the holding members 721 and 722, for example. Flexible substrate.
- the sealing portion 726 may be arranged to fill the inside of the opening 723a of the light emitting layer 723. Note that a part of the holding member 721 and a part of the holding member 722 may be arranged in the opening 723a of the light-emitting layer 723.
- the lens member 30 is disposed on the front side with respect to the light generation unit 720.
- the lens member 30 irradiates red light, which is generated light transmitted through the transflective layer 725 of the light generation unit 720, backward (in the front direction).
- the lens member 30 has an entrance surface 31 and an exit surface 32.
- the red light transmitted through the transflective layer 725 is incident on the incident surface 31.
- the emission surface 32 emits light incident on the incident surface 31 in the front direction.
- the lens member 30 transmits red light and absorbs light different from red light. Therefore, the excitation light component included in the external light is absorbed by the lens member 30.
- the inner panel 40 holds the lens member 30.
- FIG. 14 is a diagram illustrating an example of the operation of the vehicle lamp 700.
- a part of the excitation light Lb emitted in a Lambertian shape from the light emitting surface 11a is directly applied to the light emitting layer 723. Further, a part of the excitation light Lb is incident on the holding members 721, 722 from the incident surfaces 721f, 722f, is guided by the holding members 721, 722, and is irradiated on the light emitting layer 723.
- the light emitting layer 723 When the light emitting layer 723 is irradiated with the excitation light Lb, the light emitting layer 723 is excited to emit red light L71. Part of the red light L71 generated in the light emitting layer 723 is emitted backward, passes through the holding member 722, and reaches the transflective layer 725. Of the red light L71, part of the red light L72 is transmitted through the transflective layer 725 and emitted backward, and part of the red light L73 is reflected forward by the transflective layer 725. The red light L73 reflected forward passes through the opening 723a, reaches the reflective layer 724, and is reflected back by the reflective layer 724.
- the red light L73 reflected by the reflective layer 724 passes through the opening 723a and reaches the transflective layer 725 again.
- the red light L73 reflected by the reflective layer 724 reaches a region inside the red light L71 of the semi-transmissive reflective layer 725 because the reflective layer 724 is curved in a state of protruding forward. I do.
- part of the red light L74 passes through the transflective layer 725 and is emitted backward, and part of the red light 5 is reflected forward by the transflective layer 725.
- the red light L75 passes through the opening 723a, reaches the reflective layer 724, and is reflected back by the reflective layer 724.
- the red light L75 reflected by the reflection layer 724 reaches a region inside the red light L73 in the transflective reflection layer 725. Then, a part of the red light L75 out of the red light L75 passes through the transflective layer 725 and is emitted backward, and a part is reflected forward by the transflective layer 725. As described above, the red light emitted backward from the light emitting layer 723 is multiple-reflected by the reflective layer 724 and the transflective layer 725, and a part of the red light is emitted backward from the transflective layer 725. You.
- part of the red light L77 is emitted forward, passes through the holding member 721, and reaches the reflective layer 724.
- the red light L77 is reflected backward by the reflection layer 724, passes through the opening 723a, and reaches the transflective layer 725.
- part of the red light L78 passes through the transflective layer 725 and is emitted backward, and part of the red light L79 is reflected forward by the transflective layer 725.
- the red light L79 reflected forward passes through the opening 723a, reaches the reflective layer 724, and is reflected back by the reflective layer 724.
- the red light L79 reflected by the reflective layer 724 passes through the opening 723a and reaches a region of the transflective layer 725 inside the red light L77. Then, of the red light L79, a part of the red light L80 is transmitted through the transflective layer 725 and emitted backward, and a part of the red light L81 is reflected forward by the transflective layer 725.
- the red light L81 passes through the opening 723a, reaches the reflective layer 724, and is reflected backward by the reflective layer 724.
- the red light L81 reflected by the reflection layer 724 passes through the opening 723a and reaches a region of the transflective layer 725 inside the red light L79.
- red light L81 out of the red light L81 passes through the transflective layer 725 and is emitted backward, and a part is reflected forward by the transflective layer 725.
- red light emitted forward from the light emitting layer 723 is also multiple-reflected by the reflective layer 724 and the semi-transmissive reflective layer 725, and a part of the red light is also reflected backward from the semi-transmissive reflective layer 725. Out.
- FIG. 14 shows the red light L71 emitted backward and the red lights L72 to L76 based on the red light L71 below the light-emitting layer 723 so that the figure can be easily identified.
- the red light L77 emitted forward and red lights L78 to L82 based on the red light L77 are shown in the upper part of FIG.
- FIG. 15 is a diagram illustrating an example of a case where the light source unit U7 is viewed from the front.
- a rectangular and annular light emitting region R2 is formed by the red light L72 and L78 transmitted through the transflective layer 725.
- the red light L74 and L80 transmitted through the transflective layer 725 form a rectangular and annular light emitting region R4 inside the light emitting region R2.
- the red light L76 and L82 transmitted through the transflective layer 725 form a rectangular and annular light emitting region R6 inside the light emitting region R4.
- the red light L72 and L78 emitted from the light emitting region R2 has a smaller number of multiple reflections and a shorter optical path length than the red light emitted from the other light emitting regions R4 and R6.
- the red light L74, L80 emitted from the light emitting region R4 has a longer optical path length than the red light L72, L78 emitted from the light emitting region R2, and is compared with the red light L74, L82 emitted from the light emitting region R6.
- the optical path length is short.
- the red light L76 and L82 emitted from the light emitting region R6 have a longer optical path length than the red light emitted from the other light emitting regions R2 and R4.
- red light from the outer light emitting region R2 emits light on the near side
- red light from the intermediate light emitting region R4 emits light at the intermediate position. Then, it can be recognized that the red light from the inner light emitting region R6 emits light at the innermost side.
- the light source unit U7 includes the light source unit 10 that emits the excitation light Lb, the light emitting layer 723 that emits red light as generated light when irradiated with the excitation light Lb, and the light emitting layer 723.
- a reflective layer 724 disposed on the back side of the light emitting layer 723 and reflecting the red light backward, and a red light disposed on the front side of the light emitting layer 723 and positioned between the reflective layer 724 and the light emitting layer 723.
- a light generating unit 720 having a transflective layer 725 that transmits part of the light and partially reflects forward, and holding members 721 and 722 that hold the light emitting layer 723, the reflective layer 724, and the transflective layer 725,
- the lens unit 30 is disposed on the front side with respect to the light generation unit 720 and irradiates red light, which is generated light transmitted through the transflective layer 725 of the light generation unit 720, backward.
- the light-emitting layer 723 emits red light as generated light by irradiating the excitation light from the light source 11, electrical deterioration unlike the organic light-emitting diode does not occur.
- This makes it possible to provide the light source unit U7 that can perform surface light emission while ensuring the reliability of the light source 11 at low cost.
- the red light generated in the light emitting layer 723 is multiple-reflected by the reflection layer 724 and the transflective layer 725, part of the red light is emitted from the transflective layer 725 and irradiated from the lens member 30. Because of this configuration, red light is emitted in a state where the optical path length varies depending on the number of multiple reflections. This allows the observer to recognize a light emitting state having a sense of depth.
- the light emitting layer 723 is formed using an organic material. As a result, surface light emission can be easily performed, and a transparent state can be maintained in a state where irradiation with excitation light is not performed.
- the light emitting layer 723 is formed in an annular shape when viewed from behind (front direction). Accordingly, the red light reflected by the transflective layer 725 easily passes through the frame and reaches the reflective layer 724. Further, the red light reflected by the reflection layer 724 easily passes through the inside of the frame to reach the transflective reflection layer 725. Therefore, it is possible to effectively use the red light.
- the light source unit 10 is disposed below the light emitting layer 723 in a vehicle mounted state. Thereby, the light emitting layer 723 can be efficiently irradiated with the excitation light Lb.
- the reflection layer 724 is curved in a state of protruding forward. According to this configuration, the red light can be reflected toward the inside. Therefore, for example, when the light emitting layer 723 is annular as in the present embodiment, when the light source unit U7 is viewed from the rear, a plurality of annular rings that appear to have different distances in the depth direction (front-back direction) from outside to inside.
- the light-emitting regions R2, R4, and R6 can be recognized by the observer.
- the holding members 721 and 722 have side surfaces connecting the front and back flat portions, and the light source portion 10 has the light emitting surface 11a for emitting the excitation light Lb facing the side surface. It may be arranged as. Accordingly, the excitation light can be incident from the side surfaces of the holding members 721 and 722 to guide the inside of the holding members 721 and 722 to irradiate the light emitting layer 723 with the excitation light. Therefore, the light-emitting layer 723 can be efficiently irradiated with the excitation light.
- the light emitting layer 723 emits red light as generated light. This makes it possible to easily obtain red light emitted in a planar manner for a tail lamp or the like.
- the lens member 30 transmits red light and absorbs light different from red light. Thereby, the excitation light component included in the external light can be absorbed by the lens member 30. Therefore, it is possible to prevent the light emitting layer 723 from emitting light when the light source 11 is not turned on.
- the vehicle lamp 700 includes the above-described light source unit U7. According to this configuration, it is possible to perform surface light emission while securing the reliability of the light source 11 and to provide the light source unit U7 capable of suppressing costs, so that a vehicle capable of realizing stable light emission at low cost can be realized.
- the lighting fixture 700 is obtained. Further, since the light source unit U7 that allows the observer to recognize the light emitting state with a sense of depth is provided, the vehicle lamp 700 with excellent visibility can be obtained.
- the technical scope of the present invention is not limited to the above-described embodiment, and can be appropriately modified without departing from the spirit of the present invention.
- the configuration in which the light emitting layer 723 is formed in a ring shape in a front view has been described as an example.
- the present invention is not limited to this. It may be shaped.
- the configuration in which the opening 723a is formed in the center of the light emitting layer 723 when viewed from the front is described as an example.
- the present invention is not limited to this, and the reflective layer 724 and the transflective layer 725 may be used.
- Other configurations may be used as long as the configuration has a portion through which light to be multiply reflected can pass.
- a configuration in which the light emitting layer 723 is disposed in a partial area such as a central portion, an upper half, a lower half, a left half, and a right half of the holding members 721 and 722 in a front view may be employed.
- the configuration in which the reflective layer 724 protrudes from the outer peripheral side to the central side of the holding member 721 toward the back side is described as an example, but the present invention is not limited to this.
- the reflection layer 724 may be configured to protrude rearward from one end to the other end in at least one of the vertical direction and the horizontal direction of the holding member 721.
- FIG. 16 is a diagram illustrating an example of a vehicle lamp 800 according to a modification.
- the vehicle lamp 800 shown in FIG. 16 includes light source units 10A and 10B, a light generation unit 820, a light source unit U8 including a lens member 830, and an inner panel (not shown).
- the light source unit 10A is a light source that emits white light La.
- the light source unit 10B is a light source that emits, for example, ultraviolet light as the excitation light Lb.
- the light generation unit 820 includes a holding member 821, a light reflection film 822, a light emitting layer 823, and a sealing unit 824.
- the holding member 821 is formed, for example, in a plate shape.
- the holding member 821 can be formed using, for example, a thermoplastic material such as polycarbonate, glass, or an acrylic resin.
- the holding member 821 may be a rigid substrate or a flexible substrate. Further, the holding member 821 may have a configuration that does not transmit light.
- the light reflection film 822 is formed on the surface of the holding member 821 and reflects light emitted from the light sources 10A and 10B.
- the light reflection film 822 is formed of a metal material such as aluminum, silver, or an alloy thereof.
- the light emitting layer 823 is formed on the light reflecting film 822.
- the light emitting layer 823 emits generated light by being excited by irradiation with the excitation light Lb from the light source 10B.
- the light emitting layer 823 transmits white light La from the light source 10A.
- the light-emitting layer 823 for example, 4,4′-bis (carbazoyl) biphenyl (CBP) or the like is used on the host side, and Btp2Ir (acac) (bis (2- (2'-benzo [4,5-a] thienyl) @ pyridinato-N, C3 ') iridium (acetylacetonate), etc.
- the light-emitting layer 823 emits red light L90 as generated light.
- the host material and the dope material are not limited to the above materials, and an inorganic material such as YAG (Yttrium Aluminum Aluminum Garnet) may be used for the light emitting layer 823.
- the sealing portion 824 transmits the excitation light Lb and the red light L90 and seals the light emitting layer 823.
- the sealing portion 824 may be made of a resin material such as a silicone resin or an inorganic material such as SiO 2 .
- the white light La when the white light La is emitted from the light source 10A, the white light La passes through the sealing portion 824 and the light emitting layer 823, reaches the light reflecting film 822, and is reflected by the light reflecting film 822.
- the reflected white light La passes through the light emitting layer 823 and the sealing portion 824, passes through the lens 830, and is emitted to the outside. Therefore, the white light La emitted from the light source 10A is emitted to the outside without being absorbed.
- the excitation light Lb when the excitation light Lb is emitted from the light source 10B, the excitation light Lb passes through the sealing portion 824, reaches the light emitting layer 823, and is absorbed by the light emitting layer 823.
- the light emitting layer 823 generates the red light L90 by absorbing the excitation light Lb.
- Part of the generated red light L90 passes through the sealing portion 824 as it is and reaches the lens 830.
- a part of the generated red light L90 travels to the light reflection film 822 side and is reflected by the light reflection film 822.
- the reflected red light L90 passes through the light emitting layer 823 and the sealing portion 824 and reaches the lens 830.
- the red light L90 that has reached the lens 830 is transmitted through the lens 830 and emitted to the outside.
- the white light La when the white light La is emitted from the light source 10A, it can be used as, for example, a backlight or the like.
- the ultraviolet light Lb when the ultraviolet light Lb is emitted from the light source 10B, it can be used as a part of a rear lamp or an accessory lamp.
- the light emitting layers 22, 222, 322, 425, 427, 429, 723, and 823 may be formed on a transparent sheet such as a PET (polyethylene terephthalate) sheet. Further, a configuration in which excitation light Lb from a light source is directly applied to the light emitting layer may be employed.
- the light emitting layers 22, 222, 322, 425, 427, 429, 723, and 823 may be formed on an optical member such as an inner lens that controls light from a light source.
- the excitation light Lb is applied to the light emitting layer in a state where the light distribution is controlled by the optical member.
- L1, L2, L71 to L82, L90 red light
- La white light
- Lb excitation light
- R2, R4, R6 light emitting region
- U1, U2, U3, U4, U5, U6, U7, U8 light source unit , 10, 10A, 10B light source unit, 11 light source, 11a light emitting surface, 12 support substrate, 13, 14 heat sink, 20, 120, 220, 320, 420, 520, 820 light generation unit 21, 121, 221, 321, 424, 426, 428, 721, 722, 821 ... holding members, 21a, 21b, 424a, 426a, 426b, 428a, 428b, 721b, 722a, 722b ...
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- Microelectronics & Electronic Packaging (AREA)
- Optics & Photonics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
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Abstract
Description
Claims (21)
- 励起光を出射する光源と、
前記励起光が照射されることで生成光を発光する発光層と、前記発光層を保持する保持部材とを有する光生成部と、
前記発光層からの前記生成光を車両搭載状態における正面方向に照射するレンズ部材と
を備える車両用灯具の光源ユニット。 - 前記発光層は、有機材料を用いて形成される
請求項1に記載の車両用灯具の光源ユニット。 - 前記光生成部は、前記励起光及び前記生成光を透過し前記発光層を封止する封止部を有する
請求項2に記載の車両用灯具の光源ユニット。 - 前記保持部材は、前記励起光を透過し、表裏に平面部を有する板状であり、
前記発光層は、前記保持部材の表裏の前記平面部の少なくとも一方に形成され、
前記光生成部は、前記発光層が形成された前記平面部が車両搭載状態における前記正面側に配置される
請求項1から請求項3のいずれか一項に記載の車両用灯具の光源ユニット。 - 前記保持部材は、前記生成光を透過可能であり、
前記発光層は、前記保持部材の表裏の前記平面部の両方に形成される
請求項4に記載の車両用灯具の光源ユニット。 - 前記保持部材は、表裏の前記平面部同士を接続する側面を有し、
前記光源は、前記励起光を出射する出射面が前記側面に対向して配置される
請求項4又は請求項5に記載の車両用灯具の光源ユニット。 - 前記保持部材は、前記側面を複数有し、
複数の前記側面のうち前記出射面に対向する前記側面とは異なる前記側面は、前記励起光を拡散させる光拡散部を有する
請求項6に記載の車両用灯具の光源ユニット。 - 前記保持部材は、前記生成光を透過可能であり、
前記光生成部は、前記平面部同士が対向するように前記保持部材が複数配置される
請求項4から請求項7のいずれか一項に記載の車両用灯具の光源ユニット。 - 複数の前記光生成部に設けられる前記発光層は、正面視において互いに異なる領域に配置される
請求項8に記載の車両用灯具の光源ユニット。 - 複数の前記光生成部に設けられる前記発光層は、正面視において互いに径が異なる環状である
請求項9に記載の車両用灯具の光源ユニット。 - 前記発光層は、前記生成光として赤色光を発光する
請求項1から請求項10のいずれか一項に記載の車両用灯具の光源ユニット。 - 前記レンズ部材は、赤色光を透過し、赤色光とは異なる光を吸収する
請求項1から請求項11のいずれか一項に記載の車両用灯具の光源ユニット。 - 請求項1から請求項12のいずれか一項に記載の車両用灯具の光源ユニットを備える車両用灯具。
- 励起光を出射する光源と、
前記励起光が照射されることで生成光を発光する発光層と、前記発光層に対して車両搭載状態における背面側に配置され前記生成光を車両搭載状態における正面方向に反射する反射層と、前記発光層に対して車両搭載状態における正面側であって前記反射層との間で前記発光層を挟む位置に配置され前記生成光の一部を透過し一部を車両搭載状態における背面方向に反射する半透過反射層と、前記発光層、前記反射層及び前記半透過反射層を保持する保持部材とを有する光生成部と、
前記光生成部に対して前記正面側に配置され、前記半透過反射層を透過した前記生成光を前記正面方向に照射するレンズ部材と
を備える車両用灯具の光源ユニット。 - 前記発光層は、有機材料を用いて形成される
請求項14に記載の車両用灯具の光源ユニット。 - 前記発光層は、前記正面方向から見て環状に形成される
請求項14又は請求項15に記載の車両用灯具の光源ユニット。 - 前記光源は、前記発光層に対して車両搭載状態における下側に配置される
請求項14から請求項16のいずれか一項に記載の車両用灯具の光源ユニット。 - 前記反射層は、前記背面方向に突出した状態で湾曲される
請求項14から請求項17のいずれか一項に記載の車両用灯具の光源ユニット。 - 前記発光層は、前記生成光として赤色光を発光する
請求項14から請求項18のいずれか一項に記載の車両用灯具の光源ユニット。 - 前記レンズ部材は、赤色光を透過し、赤色光とは異なる光を吸収する
請求項14から請求項19のいずれか一項に記載の車両用灯具の光源ユニット。 - 請求項14から請求項20のいずれか一項に記載の車両用灯具の光源ユニットを備える車両用灯具。
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US17/252,975 US11215335B2 (en) | 2018-06-21 | 2019-06-21 | Light source unit of vehicle lighting system and vehicle lighting system |
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CN113219813A (zh) * | 2020-01-21 | 2021-08-06 | 精工爱普生株式会社 | 电子钟表 |
CN113219807A (zh) * | 2020-01-21 | 2021-08-06 | 精工爱普生株式会社 | 钟表 |
US20210223744A1 (en) * | 2020-01-21 | 2021-07-22 | Seiko Epson Corporation | Watch |
CN113219813B (zh) * | 2020-01-21 | 2024-05-31 | 精工爱普生株式会社 | 电子钟表 |
US11953858B2 (en) | 2020-01-21 | 2024-04-09 | Seiko Epson Corporation | Watch |
WO2021200972A1 (ja) | 2020-03-31 | 2021-10-07 | 市光工業株式会社 | 車両用灯具 |
US12049993B2 (en) | 2020-03-31 | 2024-07-30 | Ichikoh Industries, Ltd. | Vehicle lamp |
WO2022102785A1 (ja) | 2020-11-16 | 2022-05-19 | 市光工業株式会社 | 車両用灯具 |
EP4246036A4 (en) * | 2020-11-16 | 2024-06-05 | Ichikoh Industries, Ltd. | VEHICLE LIGHT |
WO2022102786A1 (ja) | 2020-11-16 | 2022-05-19 | 市光工業株式会社 | 車両用灯具 |
US12203624B2 (en) | 2020-11-16 | 2025-01-21 | Ichikoh Industries, Ltd. | Vehicle lamp having excitation light source, light conversion unit, and optical filter |
WO2023127789A1 (ja) * | 2021-12-28 | 2023-07-06 | 市光工業株式会社 | 車両用灯具の光源ユニット及び車両用灯具 |
WO2023234225A1 (ja) | 2022-05-31 | 2023-12-07 | 市光工業株式会社 | 車両用灯具 |
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CN117570393A (zh) | 2024-02-20 |
JP7359142B2 (ja) | 2023-10-11 |
EP3812654B1 (en) | 2024-04-10 |
CN112334703A (zh) | 2021-02-05 |
US11215335B2 (en) | 2022-01-04 |
US11959613B2 (en) | 2024-04-16 |
EP3812654A4 (en) | 2022-01-26 |
US20220107074A1 (en) | 2022-04-07 |
US20210131638A1 (en) | 2021-05-06 |
EP3812654A1 (en) | 2021-04-28 |
JPWO2019245030A1 (ja) | 2021-06-24 |
CN112334703B (zh) | 2023-12-26 |
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