JP2020006710A - Interior light for vehicle - Google Patents

Abstract

To provide an interior light for a vehicle, which can emit light in a wide range in a cabin of the vehicle while being downsized.SOLUTION: An interior light (10) for a vehicle includes an elongated base plate (11), a first light emission element (12) mounted on a mounting surface of the base plate (11) and configured to emit first light, a first wavelength conversion portion (13) configured to be excited by the first light to emit second light, and a light extraction portion exposed to the cabin and configured to emit second light. The light extraction portion includes a first side surface (13a) and a second side surface (13b) which are inclined to the base plate (11), and a ceiling surface (13c) located opposed to the base plate (11). A distance (H) between the ceiling surface (13c) and the base plate (11) is greater than a half of a maximum width (W) between the first side surface (13a) and the second side surface (13b).SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vehicle interior light.

  In recent years, lighting equipment using a light emitting diode (LED: Light Emitting Diode) as a light source has become widespread. LEDs operate at a low voltage, consume less power, and can be driven well by an in-vehicle battery. Therefore, LEDs are used for various purposes such as headlights, stop lights, and interior lights in the field of vehicle lighting.

  As a device using an LED as a vehicle interior light, a device that replaces a light bulb-type LED package with an existing light bulb has been proposed. However, since the light distribution characteristics of the light bulb and the LED are different, when a plurality of LED packages are discretely arranged in a large area, the area near the individual LED package becomes bright, and the brightness of the entire vehicle interior light becomes low. There is a problem that unevenness occurs. Further, the occurrence of luminance unevenness in the vehicle interior lamp is not preferable because it may impair the design, and there is a problem that if the total luminous flux is increased in order to obtain a required light amount, it will be dazzling.

  Therefore, on the premise that LEDs are used, vehicle interior lights that take into account the light distribution characteristics of LEDs have also been proposed (for example, see Patent Document 1 and the like). Further, in order to prevent unevenness in the brightness of the vehicle interior light, a device that indirectly irradiates light from the LED into the vehicle interior using a reflection member or a light guide member has been proposed (for example, see Patents). References 2 and 3).

JP 2007-210492 A JP 2006-321438 A JP 2008-174131 A

  However, in the vehicle interior light of the cited document 1, since light is emitted only to the area directly below, it is difficult to irradiate light over a wide area in the vehicle interior. In addition, in the vehicle interior lamps of the cited documents 2 and 3, light irradiation close to planar light emission can be realized, but the size of the entire device is large and light irradiation in the lateral direction is difficult. Is difficult to irradiate.

  SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional problems, and has as its object to provide a vehicle interior lamp capable of irradiating a wide area of a vehicle compartment with light while achieving downsizing.

  In order to solve the above-described problems, a vehicle interior light of the present invention includes an elongated substrate, a first light-emitting element mounted on a mounting surface of the substrate and emitting primary light, and excited by the primary light. A first wavelength conversion unit that emits secondary light, and a light extraction unit that is exposed in the vehicle interior and emits the secondary light, wherein the light extraction unit has a first side surface inclined with respect to the substrate and A second side surface, and a top surface facing the substrate, wherein a distance between the top surface and the substrate is larger than 最大 of a maximum width between the first side surface and the second side surface. Features.

  In such a vehicle interior light according to the present invention, the distance between the top surface and the substrate is set to be larger than 最大 of the maximum width between the first side surface and the second side surface, so that the light irradiation amount in the lateral direction is reduced. It is possible to irradiate a wide area of the vehicle compartment with light while reducing the size.

  In one aspect of the present invention, the light extraction unit is a surface of the first wavelength conversion unit.

  In one aspect of the present invention, the light extraction unit is a surface of a cover member provided so as to cover the first wavelength conversion unit.

  In one embodiment of the present invention, the mounting surface and the roof surface of the vehicle compartment are substantially flush.

  In one embodiment of the present invention, it may be arranged between the front seat and the rear seat in the vehicle interior.

  In one embodiment of the present invention, it may be arranged between the left seat and the right seat in the vehicle interior.

  In one embodiment of the present invention, a second light emitting element different from the first light emitting element, and secondary light having a different wavelength from the first wavelength conversion section excited by light emitted from the second light emitting element. A second wavelength conversion unit that emits light; and a color temperature adjustment unit that adjusts a light amount balance between the first light emitting element and the second light emitting element.

  Also, the vehicle interior lamp of the present invention includes a first light emitting element and a second light emitting element that emit primary light, and a first wavelength converter that emits secondary light when excited by the primary light of the first light emitting element. A second wavelength conversion section that is excited by primary light of the second light emitting element and emits secondary light having a wavelength different from that of the first wavelength conversion section, and the amounts of light of the first light emitting element and the second light emitting element A color temperature adjustment unit for adjusting the balance is provided.

  In such a vehicle interior light according to the present invention, the secondary light is different between the first wavelength conversion unit and the second wavelength conversion unit, and the color temperature adjustment unit adjusts the light amount balance between the first light emitting element and the second light emitting element. This makes it possible to adjust the color temperature of the light emitted into the vehicle interior.

  According to the present invention, it is possible to provide a vehicle interior lamp capable of irradiating light over a wide area of a vehicle compartment while achieving downsizing.

1A and 1B are schematic diagrams illustrating a vehicle interior light 10 according to a first embodiment, in which FIG. 1A is a schematic cross-sectional view, and FIG. 1B is a schematic perspective view. It is a schematic diagram which shows the example of arrangement | positioning of the vehicle interior light 10 in a vehicle interior, FIG.2 (a) (b) arrange | positioned along the front seat and the backseat, FIG.2 (c) (D) is arranged along the left seat and the right seat, and FIG. 2 (e) is arranged behind the headrest of the front seat. It is a schematic diagram which shows the vehicle interior light 20 which concerns on 2nd Embodiment, FIG.3 (a) shows a schematic perspective view, FIG.3 (b) has shown the schematic plan view. It is a schematic cross section which shows the vehicle interior light 30 which concerns on 3rd Embodiment. It is a schematic diagram which shows the vehicle interior lights 40-60 which concern on 4th Embodiment, FIG.5 (a) shows the example provided with the partition plate 45, FIG.5 (b) shows the modification provided further with the cover member 56. FIG. An example is shown, and FIG. 5C shows a modification in which the colored portion 67 is made of another material. FIG. 6A is a schematic cross-sectional view illustrating vehicle interior lights 110 and 120 according to a fifth embodiment, in which FIG. 6A illustrates an example in which two light emitting modules are exposed, and FIG. 6B illustrates two light emitting modules. An example in which it is accommodated in a case section 91 is shown.

(1st Embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and the repeated description will be omitted as appropriate. FIG. 1 is a schematic diagram showing a vehicle interior light 10 according to the present embodiment, in which FIG. 1A shows a schematic cross-sectional view, and FIG. 1B shows a schematic perspective view. As shown in FIGS. 1A and 1B, the vehicle interior light 10 includes a substrate 11, a light emitting element 12, and a wavelength converter 13.

  The substrate 11 is a long, substantially flat plate-shaped member formed of a material having good thermal conductivity, and has a wiring pattern (not shown) formed on one surface thereof and a plurality of light emitting elements 12 mounted thereon. I have. The material forming the substrate 11 is not limited, but it is preferable to use a metal having good thermal conductivity such as copper or aluminum. Alternatively, a composite substrate in which an insulating substrate is bonded to a conductive substrate may be used as the substrate 11, and for example, a composite substrate in which a glass epoxy resin layer is bonded to a metal substrate may be used. In addition, FIG. 1 shows a substantially flat substrate as the substrate 11, but the shape is not limited as long as the substrate 11 has a surface on which the light emitting element 12 is mounted, and may have a curved surface shape corresponding to the shape of the vehicle compartment.

  The light emitting element 12 is an element that is mounted on the substrate 11 and is electrically connected to a wiring pattern, and emits primary light when voltage is applied. For example, an LED chip or an LED package can be used. The primary light L1 emitted by the light emitting element 12 preferably has a wavelength of violet light of 380 to 420 nm, and may be a known compound semiconductor material such as a GaN-based compound. Although only one light emitting element 12 is shown on the substrate 11 in FIG. 1, a plurality of light emitting elements 12 are mounted on the substrate 11 and are preferably arranged at an interval of, for example, 5 mm or more and 25 mm or less.

  The wavelength conversion unit 13 is a member in which the phosphor particles 14 and the light scattering particles are dispersed in a dispersion medium such as a resin or glass, and is formed so as to cover the substrate 11 and the light emitting element 12. The wavelength conversion unit 13 converts the wavelength of the primary light emitted by the light emitting element 12 to emit secondary light, and irradiates the outside of the vehicle interior lamp 10 with white light by mixing the primary light and the secondary light. The specific configuration of the wavelength converter 13 is not limited, and a phosphor ceramic obtained by sintering a phosphor material may be used. Also, the wavelength conversion method using the phosphor material is not limited, and may be a method of converting the wavelength of blue light to yellow light, or a method of converting the wavelength of ultraviolet light to each color of RGB. Further, the specific phosphor material is not limited, and may be an organic substance or an inorganic substance, and a known material can be used.

  It is preferable that the wavelength conversion section 13 includes, as the phosphor particles 14, a blue phosphor material that converts violet light into blue and a yellow phosphor material that converts violet light into yellow light. Further, it is preferable to use a material that does not absorb light having a longer wavelength than blue light as the yellow phosphor material. In addition, if the content is 30% or less of the phosphor particles 14 included in the wavelength conversion unit 13, the color rendering properties can be improved by mixing a red phosphor material and a green phosphor material. The amount of the phosphor particles 14 contained in the wavelength converter 13 is preferably, for example, about 0.02 to 2.0 wt%.

Examples of blue phosphor materials include BaMgAl ₁₀ O ₁₇ : Eu ²⁺ , Ca ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ , Sr ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ , (Sr, Ca) ₁₀ (PO ₄ ) ) ₆ Cl ₂ : Eu ²⁺ , (Sr, Ca, Ba) ₁₀ (PO ₄ ) ₆ Cl ₂ : Eu ²⁺ , Ba ₃ MgSi ₂ O ₈ : Eu ²⁺ , Sr ₃ MgSi ₂ O ₈ : Eu ²⁺ , Sr ₄ Al ₁₄ O ₂₄ : Eu ²⁺ , (Ba, Sr, Ca) ₂ (B ₅ O ₉ ) X ₂ : Eu ²⁺ , SiO ₂ —CaX ₂ : Eu ²⁺ (X is a halogen element) and the like.

As the yellow phosphor material, (Ca, Sr, M) ₇ (SiO ₃ ) ₆ X ₂ : Eu ²⁺ (M is Ba, Mg, Sn, Pb, Hg, an alkali metal, a rare earth metal other than Eu, X = Halogen element), (Ba, Sr) Si ₂ O ₂ N ₂ : Eu ²⁺ , (Ba, Sr) SiO ₄ : Eu ^{2+ and the} like.

Green phosphor materials include (Ba, Sr, Ca) ₂ SiO ₄ : Eu ²⁺ , (Ba, Sr) ₂ SiO ₄ : Eu ²⁺ , Sr ₂ SiO ₄ : Eu ²⁺ , Eu ²⁺ activated β sialon, Ba ₃ Si ^{_{6 O 12 N 2: Eu 2+}} , SrGa 2 S 4: Eu 2+, SrSi 2 O 2 N 2: Eu 2+, (Ba, Sr) 2 Si 2 O 2 N 4: Eu 2+, SrAlO 4: Eu 2+ and the like No.

Examples of the red phosphor material include (Ca _1-x Sr _x ) AlSiN ₃ : Eu ²⁺ (0 ≦ x <0.4), Sr ₃ Si ₅ N ₈ : Eu ²⁺ , KF · CaKPO ₄ : Eu ^{2+ and the} like. Can be

  As shown in FIGS. 1A and 1B, the wavelength converter 13 has a first side surface 13 a and a second side surface 13 b that are inclined with respect to the substrate 11 along the longitudinal direction of the substrate 11. A top surface 13c substantially parallel to the substrate 11 is provided between the first side surface 13a and the second side surface 13b. The first side surface 13a, the second side surface 13b, and the top surface 13c, which are the surfaces of the wavelength conversion unit 13, have a substantially trapezoidal cross section, and constitute a light extraction unit in the present invention.

  In the wavelength converter 13, the maximum width between the first side surface 13a and the second side surface 13b is W, the distance (height) from the substrate 11 to the top surface 13c is H, and H> 0.5W Meet the relationship. Therefore, the inclination angle of the first side surface 13a and the second side surface 13b with respect to the substrate 11 is larger than 45 °. FIG. 1 shows an example in which the width of the substrate 11 and the width of the wavelength conversion unit 13 are equalized by W, but the widths of both may be different.

  Although the width W and the height H are not limited, it is preferable that the width W be about 5 mm to 12 mm and the height H be 2.5 mm to 7 mm. By setting the width W and the height H in this range, the vehicle interior light 10 having a small width and a small protrusion amount can be obtained. As a result, the degree of freedom in the design of the vehicle interior can be improved, and a calm atmosphere with less luminance unevenness can be produced.

  In the vehicle interior light 10 of the present embodiment, as indicated by arrows in FIG. 1, primary light and secondary light are emitted from the first side surface 13a, the second side surface 13b, and the top surface 13c, which are light extraction portions. You. At this time, the first side surface 13a and the second side surface 13b are inclined at an angle of 45 ° or more with respect to the substrate 11 and have a larger area than the top surface 13c. Light emitted from the first side surface 13a and the second side surface 13b increases. This makes it possible to reduce the light distribution in the direction perpendicular to the substrate 11 and increase the light distribution in the side direction, thereby irradiating light over a wide range.

  FIGS. 1A and 1B show an example in which the first side surface 13a, the second side surface 13b, and the top surface 13c are flat surfaces, but may be surfaces having irregularities or curved surfaces. When the first side surface 13a, the second side surface 13b, and the top surface 13c are configured as curved surfaces, a region where the inclination of a plane contacting the curved surface is 45 degrees or more with respect to the substrate 11 is defined as the first side surface 13a and the second side surface 13b, and an area smaller than 45 degrees is a top surface 13c. In the case where irregularities are formed on the surface, they may be formed symmetrically on the first side surface 13a and the second side surface 13b, or may be formed asymmetrically.

  FIG. 2 is a schematic view showing an example of the arrangement of the vehicle interior light 10 in the vehicle interior, and FIGS. 2A and 2B show the arrangement between the front seat and the rear seat. 2 (c) and 2 (d) are disposed along the left seat and the right seat, and FIG. 2 (e) is disposed behind the headrest of the front seat. 2A to 2E, only the vehicle interior light 10 is shown by a solid line, and structures other than the vehicle interior light 10 in a vehicle and a vehicle interior are shown by broken lines.

  In the example shown in FIGS. 2A and 2B, the vehicle interior light 10 is arranged on the ceiling of the passenger compartment along the space between the front seat and the rear seat, and the first side surface 13a and the second side surface 13b are arranged. The top surface 13c is exposed inside the vehicle. As described above, the vehicle interior light 10 has a large light distribution from the first side surface 13a and the second side surface 13b and a small amount of light irradiation in a region immediately below the vehicle interior light. And the area at hand of the rear seat can be brightly illuminated.

  In the example shown in FIGS. 2C and 2D, the vehicle interior light 10 is arranged on the ceiling of the passenger compartment along the space between the left seat and the right seat, and the first side surface 13a, the second side surface 13b, and the ceiling The surface 13c is exposed inside the vehicle. Also in this example, since the vehicle interior light 10 has a large light distribution from the first side surface 13a and the second side surface 13b and a small amount of light irradiation in a region immediately below, the space between the seats that do not require illumination is darkened, and the left seat and the right seat are darkened. The area at hand of the seat can be brightly illuminated.

  In the example shown in FIG. 2 (e), the vehicle interior light 10 is disposed at the rear of the headrest of the front seat, and the first side surface 13a, the second side surface 13b, and the top surface 13c are exposed in the vehicle interior. Also in this example, since the vehicle interior light 10 has a large light distribution from the first side surface 13a and the second side surface 13b and a small amount of light irradiation in the front region, it is appropriate for the face of a person sitting in the rear seat. By irradiating the light amount, it is possible to illuminate the area from the hand to the feet and the ceiling brightly.

  As described above, in the vehicle interior light 10 of the present embodiment, the distance H between the top surface 13c and the substrate 11 is larger than 最大 of the maximum width W between the first side surface 13a and the second side surface 13b. By doing so, it is possible to increase the amount of light irradiation in the lateral direction, and it is possible to irradiate light over a wide area of the vehicle compartment while reducing the size.

(2nd Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIG. A description of the same contents as in the first embodiment will be omitted. FIG. 3 is a schematic diagram showing the vehicle interior light 20 according to the present embodiment. FIG. 3A is a schematic perspective view, and FIG. 3B is a schematic plan view. The vehicle interior light 20 of the present embodiment is different from the first embodiment in that the wavelength conversion section 23 formed on the substrate 21 is not of a uniform width and that the top surface is not provided.

  As shown in FIGS. 3A and 3B, the wavelength converter 23 includes first side surfaces 23a1, 23a2, and 23a3 inclined with respect to the substrate 21, and second side surfaces 23b1, 23b2, and 23b3. In the present embodiment, the first side surfaces 23a1, 23a2, and 23a3 and the second side surfaces 23b1, 23b2, and 23b3 constitute a light extraction unit. As shown in FIG. 3B, the width of the bottom surface composed of the first side surface 23a1 and the second side surface 23b1 is substantially constant, and the first side surfaces 23a2, 23a3 and the second side surface 23b2 provided on both sides thereof. , 23b3 have a tapered shape in which the width of the bottom surface gradually decreases.

  At the interface between the wavelength converter 23 and air, light is extracted with a Lambertian distribution. Therefore, in the vehicle interior light 20 of the present embodiment, light is emitted in a direction perpendicular to each of the first side surfaces 23a1, 23a2, and 23a3 and the second side surfaces 23b1, 23b2, and 23b3. The light is emitted not only from the lateral direction from the 23a1 and the second side surface 23b1, but also from the first side surface 23a2, 23a3 and the oblique direction from the second side surface 23b2, 23b3. As a result, it is possible to irradiate light over a wide area of the vehicle compartment by two-dimensional light distribution while achieving downsizing.

  FIG. 3 illustrates an example in which the surface of the wavelength conversion unit 23 is configured only by the first side surfaces 23a1, 23a2, and 23a3 and the second side surfaces 23b1, 23b2, and 23b3, but is substantially parallel to the substrate 21 as in the first embodiment. It is also possible to provide a simple top surface.

(Third embodiment)
Next, a third embodiment of the present invention will be described with reference to FIG. A description of the same contents as in the first embodiment will be omitted. FIG. 4 is a schematic sectional view showing the vehicle interior light 30 according to the present embodiment.

  The vehicle interior light 30 of the present embodiment includes a substrate 31, a light emitting element 32, and a wavelength conversion unit 33, and phosphor particles 34 are dispersed in the wavelength conversion unit 33. Further, the vehicle interior light 30 is attached to the interior ceiling 35 of the vehicle interior, and is disposed at a certain distance from the vehicle body 36.

  The housing 37 is a member attached to the rear side of the indoor ceiling 35 to fix the substrate 31 to an opening provided in the indoor ceiling 35. The housing 37 is fixed to the ceiling 35 with screws 38. The material and shape of the housing 37 are not limited, and examples thereof include a material obtained by bending a metal material such as aluminum or copper. Further, the substrate 31 is fixed to the lower surface of the housing 37 with screws 38. By making the total of the amount of protrusion of the housing 37 bent and the thickness of the substrate 31 substantially equal to the thickness of the indoor ceiling 35, the mounting surface 31 a of the substrate 31 on which the light emitting element 32 is mounted becomes the roof surface 35 a of the indoor ceiling 35. It is made to be substantially flush.

  In the example shown in FIG. 4, the surface of the wavelength conversion unit 33 is formed of a curved surface, and the region where the inclination angle with respect to the substrate 31 is 45 degrees or more is the first side surface and the second side surface, and the region where the inclination angle is less than 45 degrees. Can be regarded as the top surface.

  In the present embodiment, since the mounting surface 31a and the roof surface 35a are substantially flush with each other, the light extracted from the first side surface and the second side surface is not blocked by the indoor ceiling 35, thereby improving the light use efficiency and improving the vehicle efficiency. Light can be applied to a wide area of the room. In addition, since the mounting surface 31a does not protrude from the roof surface 35a, the amount of protrusion of the entire vehicle interior light 30 in the vehicle interior can be suppressed, and the livability and aesthetic appearance in the vehicle interior can be secured.

  FIG. 4 shows an example in which the substrate 31 and the housing 37 are fixed with the screws 38, but an adhesive may be used, or a fitting structure such as fixing (patching) by bending the housing 37 may be provided. In addition, a heat conductive grease or a heat conductive sheet may be interposed between the substrate 31 and the housing 37 to improve heat dissipation. Further, the vehicle interior light 30 may be separately covered with a cover lens or the like. When the cover lens is attached, the antifouling property and the impact resistance of the vehicle interior light 30 can be improved.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described with reference to FIG. A description of the same contents as in the first embodiment will be omitted. 5A and 5B are schematic diagrams showing the vehicle interior lights 40 to 60 according to the present embodiment. FIG. 5A shows an example including a partition plate 45, and FIG. FIG. 5C shows a modification in which the colored portion 67 is made of another material.

  The vehicle interior light 40 shown in FIG. 5A includes a substrate 41, a plurality of light emitting elements 42a and 42b, a wavelength converter 43, phosphor particles 44, and a partition plate 45. The plurality of light emitting elements 42 a and 42 b are arranged in two rows on the left and right along the longitudinal direction of the substrate 41. The partition plate 45 is a light-shielding or light-reflective plate-like member that stands upright along the longitudinal direction of the substrate 41, and is located between the light-emitting elements 42a and 42b arranged in two rows. . Here, the partition plate 45 has a substantially flat shape, but may have a tapered shape, a concave shape, a convex shape, or the like.

  In the vehicle interior light 40, since the partition plate 45 is provided between the two rows of the light emitting elements 42a and 42b, the light from the light emitting elements 42a and 42b is extracted from the side surface of the wavelength converter 43 in which each is arranged. . Further, since the light is blocked or reflected by the partition plate 45, the amount of light extracted toward the top surface decreases. This further reduces the amount of light emitted from the top surface of the light extraction portion in the vertical direction of the substrate 41, increases the amount of light extracted from the side surface, and irradiates light over a wide area of the vehicle compartment while reducing the size. Becomes possible.

  Further, by individually controlling the lighting of the light emitting elements 42a and 42b, it is possible to make only one side in the vehicle compartment bright. For example, in the example shown in FIGS. 2A and 2B, only the front seat or the rear seat can be illuminated brightly, and in the example shown in FIGS. It is possible to irradiate brightly, and in the example shown in FIG. 2E, it is possible to irradiate only the area near the rear seat or the vicinity of the ceiling brightly.

  The vehicle interior light 50 shown in FIG. 5B includes a substrate 51, a plurality of light emitting elements 52a and 52b, a wavelength converter 53, phosphor particles 54, a partition plate 55, and a cover member 56. ing. The cover member 56 is a member provided on the substrate 51 so as to cover the wavelength conversion unit 53, and transmits light from the wavelength conversion unit 53 and extracts the light to the outside. The cover member 56 has a height equal to or more than の of the maximum width. Therefore, the cover member 56 corresponds to the light extraction portion of the present invention, and the surface thereof forms the first side surface, the second side surface, and the top surface. The cover member 56 may be transparent or may be colored. Also, the surface or inside of the cover member 56 may include irregularities or fine particles that scatter light.

  In the vehicle interior light 50 as well, the surface of the cover member 56 serves as a light extraction portion to improve light irradiation in the side direction, so that it is possible to irradiate light over a wide area of the vehicle compartment while reducing the size.

  The vehicle interior light 60 shown in FIG. 5C includes a substrate 61, a plurality of light emitting elements 62a and 62b, a wavelength conversion unit 63, phosphor particles 64, a partition plate 65, a cover member 66, A coloring section 67 is provided. The coloring portion 67 is a portion provided on the front end portion or the top surface portion of the cover member 66, and is formed in a color different from that of the cover member 66. As a method of forming the colored portion 67, a predetermined region of the cover member 66 can be colored by printing or painting, or two-color molding of resin can be used.

  In the vehicle interior light 60, since the coloring portion 67 is formed at the tip of the cover member 66, light extraction in the direction perpendicular to the substrate 61 is suppressed, light irradiation in the side direction is improved, and the size is reduced. Thus, it is possible to irradiate light over a wide area of the vehicle compartment. Further, by forming the colored portion 67 on the cover member 66, the design of the vehicle interior light 60 can be improved, and the design of the vehicle interior can be improved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described with reference to FIG. A description of the same contents as in the first embodiment will be omitted. FIG. 6 is a schematic cross-sectional view showing the vehicle interior lights 110 and 120 according to the present embodiment. FIG. 6A shows an example in which two light emitting modules are exposed, and FIG. An example in which a light emitting module is accommodated in a case section 91 is shown.

  The vehicle interior lamp 110 shown in FIG. 6A includes a light emitting module 70 and a light emitting module 80 having different emission wavelengths. The light emitting modules 70 and 80 have the same configuration as the vehicle interior light 10 in the first embodiment, and include substrates 71 and 81, light emitting elements 72 and 82, wavelength converters 73 and 83, and a phosphor, respectively. Particles 74 and 84 are provided.

  The wavelengths of the light emitting module 70 and the light emitting module 80 can be different from each other by differentiating the light emitting wavelengths of the light emitting element 72 and the light emitting element 82, by using different phosphor materials for the phosphor particles 74 and the phosphor particles 84, The ratio of the plurality of phosphor materials constituting the body particles 74 and the phosphor particles 84 may be different.

  Although the specific wavelengths of the light-emitting module 70 and the light-emitting module 80 are not limited, for example, the light-emitting module 70 is changed from day white to daylight having a color temperature of 5500K or more, and the light-emitting module 80 is changed from warm white to a color temperature of 3500K or less to bulb color. .

  Further, the vehicle interior light 110 includes a control circuit for controlling the light amount of the light emitting module 70 and the light amount of the light emitting module 80, respectively. The circuit constitutes a color temperature adjusting unit for adjusting the light amount balance between the light emitting module 70 and the light emitting module 80. Have been. As the control of the light amount by the control circuit, a known method such as current control or PWM (Pulse Width Modulation) control can be used.

  The vehicle interior light 110 emits light in which light emitted from each of the light emitting module 70 and the light emitting module 80 is mixed as a whole. Therefore, when the light amount balance between the light emitting module 70 and the light emitting module 80 is adjusted by the color temperature adjusting section, it is possible to irradiate a wide range in the vehicle cabin with both color temperatures at both ends.

  The vehicle interior light 120 shown in FIG. 6B further has a case portion 91 and a cover member 92, and the light emitting module 70 and the light emitting module 80 are accommodated in the case portion 91, and are covered with the cover member 92. I have. If the case portion 91 is made of a light-reflective material and the cover member 92 is provided with a structure for scattering light, the light of different wavelengths from the light emitting module 70 and the light emitting module 80 is mixed well, and the light enters the vehicle interior. Can be irradiated.

  The present invention is not limited to the above embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining the technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

10, 20, 30, 40, 50, 60, 110, 120 ... vehicle interior lights 70, 80 ... light emitting modules 11, 21, 31, 41, 51, 61, 71 ... substrates 12, 32, 42a, 42b, 52a , 52b, 62a, 62b, 72 ... Light-emitting elements 13, 23, 33, 43, 53, 63, 73 ... Wavelength converters 14, 34, 44, 54, 64, 74, 84 ... Phosphor particles 13a, 23a1, 23a2 , 23a3 ... first side surfaces 13b, 23b1, 23b2, 23b3 ... second side surfaces 13c ... top surface 31a ... mounting surface 35 ... indoor ceiling 35a ... roof surface 36 ... vehicle body 37 ... housings 38, 39 ... screws 45, 55, 65 ... Partition plates 56, 66, 92 ... Cover member 67 ... Colored part 91 ... Case part

Claims (8)

A long board,
A first light emitting element mounted on a mounting surface of the substrate and emitting primary light;
A first wavelength converter that emits secondary light when excited by the primary light;
A light extraction unit that is exposed in the vehicle interior and irradiates the secondary light,
The light extraction unit has a first side surface and a second side surface inclined with respect to the substrate, and a top surface facing the substrate,
The vehicle interior light according to claim 1, wherein a distance between the top surface and the substrate is greater than 1/2 of a maximum width between the first side surface and the second side surface. The vehicle interior light according to claim 1,
The interior light for a vehicle, wherein the light extraction unit is a surface of the first wavelength conversion unit. The vehicle interior light according to claim 1,
The vehicle interior light according to claim 1, wherein the light extraction unit is a surface of a cover member provided to cover the first wavelength conversion unit. The vehicle interior light according to claim 1, wherein:
A vehicle interior light, wherein the mounting surface and the roof surface of the vehicle interior are substantially flush. The vehicle interior light according to any one of claims 1 to 4,
A vehicle interior light, wherein the vehicle interior light is arranged along a space between a front seat and a rear seat in the vehicle interior. The vehicle interior light according to any one of claims 1 to 4,
A vehicle interior light, wherein the vehicle interior light is arranged along a space between a left seat and a right seat in the vehicle interior. It is a vehicle interior light according to any one of claims 1 to 6,
A second light emitting element different from the first light emitting element;
A second wavelength conversion unit that is excited by light emitted by the second light emitting element and emits secondary light having a different wavelength from the first wavelength conversion unit;
An interior light for a vehicle, comprising: a color temperature adjusting unit that adjusts a light amount balance between the first light emitting element and the second light emitting element. A first light emitting element and a second light emitting element that emit primary light;
A first wavelength converter that emits secondary light when excited by primary light of the first light emitting element;
A second wavelength converter that is excited by primary light of the second light emitting element and emits secondary light having a wavelength different from that of the first wavelength converter;
An interior light for a vehicle, comprising: a color temperature adjusting unit that adjusts a light amount balance between the first light emitting element and the second light emitting element.