Vehicle lighting fixtures

Abstract

To provide a vehicular lighting fixture capable of making an article in a lamp chamber invisible.SOLUTION: A vehicular lighting fixture is equipped with a lamp housing 2 and a lamp lens 3 forming a lamp chamber 23, and an excitation light irradiation unit 4, a light conversion unit 5 and an optical filter 6 disposed in the lamp chamber 23. The optical filter 6 is disposed between the excitation light irradiation unit 4 and the light conversion unit 5, and shuts off light of a specified wavelength range. Consequently, the vehicular lighting fixture can suppress a phenomenon that an image from the outside can be seen in the lamp chamber 23 through the lamp lens 3 and an article in the lamp chamber 23 can be seen through the lamp lens 3, and can make the article in the lamp chamber 23 invisible.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a vehicle lamp. [Background technology]

[0002] 2. Description of the Related Art Patent Document 1 discloses, for example, a vehicle lamp that utilizes secondary light (luminescence, photoluminescence) emitted by excitation light irradiated from an excitation light source.

[0003] The vehicle lamp of Patent Document 1 includes an excitation light source that irradiates excitation light, a light-emitting layer that emits secondary light (red light) in response to the excitation light (blue light) irradiated from the excitation light source, a holding member that holds the light-emitting layer, and a lamp lens (lens member) through which the secondary light is emitted to the outside.

[0004] The vehicle lamp of Patent Document 1 obtains surface emission by secondary light emitted from the light-emitting layer. Moreover, since the vehicle lamp of Patent Document 1 uses a light-emitting layer that does not require electrical energy as a surface emission light source, the reliability of the surface emission light source is improved compared to an organic light-emitting diode that requires electrical energy as a surface emission light source. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] International Publication No. 2019 / 245030 Summary of the Invention [Problem to be solved by the invention]

[0006] In such vehicle lighting fixtures, when external light passes through the lamp lens and enters the lamp chamber and is reflected by the light-emitting layer, and the reflected external light passes through the lamp lens from within the lamp chamber and is emitted to the outside, an image from outside may be seen inside the lamp chamber through the lamp lens (see external light L4 and human field of vision IP in Figure 1).

[0007] Furthermore, in such vehicle lighting fixtures, when external light passes through the lamp lens and enters the lamp chamber and is reflected by the light-emitting layer, the reflected external light strikes an object within the lamp chamber and is then reflected. If this reflected light travels the same path through the lamp lens and is emitted to the outside, the object within the lamp chamber may be visible through the lamp lens.

[0008] The above phenomenon is undesirable in terms of the appearance of a vehicle lamp. For this reason, in such vehicle lamps, it is important to suppress the phenomenon in which an image from outside is seen inside the lamp chamber through the lamp lens, or an object inside the lamp chamber is seen through the lamp lens, that is, to make the object inside the lamp chamber invisible. Note that the above phenomenon appears more prominently when a reflective layer is provided on the light-emitting layer.

[0009] An object of the present invention is to provide a vehicle lamp capable of making objects within a lamp chamber invisible. [Means for solving the problem]

[0010] The vehicle lamp of the present invention comprises a lamp housing and a lamp lens which form a lamp chamber, and an excitation light irradiation unit, a light conversion unit and an optical filter which are arranged within the lamp chamber, wherein the excitation light irradiation unit irradiates excitation light onto the light conversion unit, the light conversion unit emits secondary light by the excitation light irradiated from the excitation light irradiation unit and emits the secondary light towards the lamp lens, and the optical filter transmits the excitation light and absorbs the secondary light.

[0011] In the vehicle lamp of the present invention, it is preferable that the optical filter is disposed between the excitation light irradiation unit and the light conversion unit and at a position outside the emission range of the secondary light.

[0012] In the vehicular lamp of the present invention, it is preferable that the light converting unit is disposed at an angle greater than 0° with respect to a normal to the emission direction of the secondary light.

[0013] In the vehicle lamp of the present invention, it is preferable that the light converting unit is disposed at an angle greater than 0° with respect to the vertical.

[0014] In the vehicle lamp of the present invention, it is preferable that the excitation light irradiation unit has an excitation light source that emits excitation light, and an excitation light final irradiation surface that finally irradiates the excitation light emitted from the excitation light source to the light conversion unit, the light conversion unit has a luminous film that emits secondary light by the excitation light irradiated from the excitation light final irradiation surface, a reflective film that reflects the secondary light emitted from the luminous film toward the luminous film, and a secondary light emission surface that emits the secondary light toward the lamp lens, and the optical filter is disposed between the excitation light final irradiation surface of the excitation light irradiation unit and the secondary light emission surface of the light conversion unit, at a position away from the secondary light emission surface in a front view seen from the opposite direction to the emission direction of the secondary light.

[0015] In the vehicle lamp of the present invention, it is preferable that the light conversion unit is arranged with the secondary light emission surface facing downward at an angle greater than 0° with respect to the normal to the emission direction of the secondary light, and that the optical filter and the excitation light irradiation unit are arranged below the light conversion unit.

[0016] In the vehicle lamp of the present invention, it is preferable that the light conversion unit is arranged with the secondary light emission surface facing downward at an angle greater than 0° with respect to the vertical, and that the optical filter and the excitation light irradiation unit are arranged below the light conversion unit.

[0017] In the vehicular lamp of the present invention, it is preferable that the lamp lens is composed of a red lens, the excitation light has a dominant wavelength shorter than 500 nm, the secondary light has a dominant wavelength longer than 500 nm, and the optical filter has a portion of the excitation light having a transmittance of 50% or more in the wavelength range of the excitation light from 200 nm to 500 nm, and a portion of the secondary light having a transmittance of 50% or less in the wavelength range of the secondary light from 500 nm to 800 nm.

[0018] In the vehicular lamp of the present invention, it is preferable that at least a surface of the lamp housing facing the lamp chamber is black. Effect of the Invention

[0019] The vehicle lamp of the present invention can make objects within the lamp chamber invisible. [Brief description of the drawings]

[0020] [Figure 1] FIG. 1 is a schematic vertical cross-sectional view showing a first embodiment of a vehicle lamp according to the present invention. [Diagram 2] FIG. 2 is a partially enlarged schematic vertical sectional view showing the light conversion unit. [Diagram 3] FIG. 3 is a partially enlarged explanatory diagram showing the optical path of the excitation light and the optical path of the secondary light in the optical conversion unit. [Figure 4] 4 is an explanatory diagram showing the dominant wavelengths of white light, yellow-orange light (amber light), and red light, in which the vertical axis indicates relative luminous intensity (au) and the horizontal axis indicates wavelength (nm). [Diagram 5] 5 is an explanatory diagram showing the reflectance of different reflective film materials, where the vertical axis indicates the reflectance (%) and the horizontal axis indicates the wavelength (nm). [Figure 6] 6 is an explanatory diagram showing the spectral transmittance of a lamp lens (red lens), where the vertical axis represents the transmittance (%) and the horizontal axis represents the wavelength (nm). [Figure 7] 7 is an explanatory diagram showing the characteristics of an optical filter. (A) is an explanatory diagram showing the transmittance of an optical filter, with the vertical axis showing the transmittance (%) of the optical filter and the horizontal axis showing the wavelength (nm). (B) is an explanatory diagram showing the emission intensity (%) without an optical filter (see the solid curve) and the emission intensity (%) after passing through the optical filter (see the dashed curve), with the vertical axis showing the emission intensity (%) and the horizontal axis showing the wavelength (nm). [Figure 8]8 is an explanatory diagram showing the arrangement of an excitation light irradiation unit, a light conversion unit, and an optical filter. (A) is a schematic vertical cross-sectional view (corresponding to FIG. 1). (B) is a view seen from the arrow B in (A). [Figure 9] FIG. 9 is a schematic vertical cross-sectional view showing a second embodiment of a vehicle lamp according to the present invention. [Figure 10] FIG. 10 is a schematic vertical cross-sectional view showing a third embodiment of a vehicle lamp according to the present invention. [Figure 11] FIG. 11 is a schematic vertical sectional view showing a fourth embodiment of a vehicle lamp according to the present invention. [Figure 12] FIG. 12 is a front view of a vehicle lamp according to a fifth embodiment of the present invention when the vehicle lamp is not lit. [Figure 13] FIG. 13 is a front view of the vehicle lamp showing a state in which the light-emitting panel is emitting light when turned on. [Figure 14] FIG. 14 is a vertical cross-sectional view of the vehicle lamp showing the main components (a cross-sectional view taken along line XIV-XIV in FIG. 12 and a cross-sectional view taken along line XIV-XIV in FIG. 13). [Figure 15] FIG. 15 is a perspective view showing a part of a light emitting device of a vehicle lamp. [Figure 16] FIG. 16 is a schematic perspective view showing a light emitting device of a vehicle lamp. [Figure 17] FIG. 17 is an explanatory diagram showing the light-emitting design of a light-emitting panel, which shows different light-emitting patterns in the same light-emitting shape. [Figure 18] FIG. 18 is an explanatory diagram showing different light emitting patterns and different light emitting shapes as light emitting designs of light emitting panels arranged within a predetermined light distribution. [Figure 19] FIG. 19 is a vertical cross-sectional view (a cross-sectional view corresponding to FIG. 14) showing a modified example of an excitation light control member of a light emitting device of a vehicle lamp. [Figure 20] FIG. 20 is a vertical cross-sectional view (a cross-sectional view corresponding to FIG. 14 and FIG. 19) showing a modified example of an excitation light control member of a light emitting device of a vehicle lamp. [Figure 21]FIG. 21 is a vertical cross-sectional view (a cross-sectional view corresponding to FIG. 14, FIG. 19, and FIG. 20) showing a modified example of the light converting unit of the light emitting device of the vehicle lamp. [Figure 22] Fig. 22 shows a modified example of a light emitting panel of a light emitting device of a vehicle lamp. Fig. 22(A) is a partially enlarged schematic vertical cross-sectional view showing the light emitting panel. Fig. 22(B) is a partially enlarged explanatory view showing the optical path of excitation light and the optical path of secondary light in the light emitting panel. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] Hereinafter, five examples of the embodiment (example) of the vehicle lamp according to the present invention will be described in detail with reference to the drawings. In this specification, front, rear, top, bottom, left, and right refer to the front, rear, top, bottom, left, and right when the vehicle lamp according to the present invention is installed on a vehicle. In Figs. 14 to 16 and Figs. 19 to 21, the symbols "F" are "front", "B" are "rear", "U" are "up", "DE" are "down", "L" are "left", and "R" are "right". Here, the front side refers to the rear side of the vehicle, and the back side refers to the front side of the vehicle. Note that the drawings are schematic diagrams, so main parts are shown, and parts other than the main parts are omitted. Also, hatching of some parts is omitted.

[0022] (Description of the configuration of the first embodiment) 1 to 8 show a first embodiment of a vehicle lamp according to the present invention. The configuration of the vehicle lamp according to the first embodiment will be described below.

[0023] (Description of vehicle lighting fixture 1A) In FIG. 1, reference numeral 1A denotes a vehicle lamp according to the first embodiment. In this example, the vehicle lamp 1A is a tail lamp constituting a rear combination lamp. The vehicle lamp 1A may be a stop lamp, a tail stop lamp, or a turn signal lamp other than a tail lamp. The vehicle lamp 1A is attached to each of the left and right sides of the rear of a vehicle (not shown).

[0024] As shown in FIG. 1, the vehicle lamp 1A includes a lamp housing 2, a lamp lens 3, an excitation light irradiation unit 4, a light conversion unit 5, and an optical filter 6.

[0025] (Explanation of lamp housing 2) The lamp housing 2 is made of a non-light-transmitting material (such as a resin material). In this example, the lamp housing 2 is black. Note that it is sufficient that the inner surface of the lamp housing 2 (the surface facing the lamp chamber 23) is black. The lamp housing 2 may be a color other than black.

[0026] (Explanation of Lamp Lens 3) The lamp lens 3 is made of a light-transmitting resin material such as PMMA or PC. The lamp lens 3 is a transparent outer cover, outer lens, etc. The lamp lens 3 is attached to the lamp housing 2. As a result, the lamp housing 2 and the lamp lens 3 form a lamp chamber 23 as shown in FIG.

[0027] (Explanation of excitation light irradiation unit 4) 1, the excitation light irradiation unit 4 is disposed in the lamp chamber 23. The excitation light irradiation unit 4 has an excitation light source 40 and an excitation light final irradiation surface 41.

[0028] The excitation light source 40 is one or more blue LEDs, and uses a blue LED with a dominant wavelength of 450 nm. Note that, as the excitation light source 40, a light source other than a blue LED, for example, an LD (semiconductor laser) or the like may be used.

[0029] The excitation light source 40 emits excitation light L1 (see the solid arrows in Figs. 1 and 3). The excitation light L1 emitted from the blue LED excitation light source 40 is blue light with a dominant wavelength of 450 nm. Note that the excitation light L1 may be violet or ultraviolet light with a wavelength shorter than that of blue light.

[0030] Here, the white light W shown in FIG. 4 (see the dashed curve in FIG. 4) is obtained by combining a blue LED excitation light source 40 and a yellow phosphor. That is, the white light W is obtained by mixing the blue light emitted from the blue LED excitation light source 40 and the yellow light excited by the blue light and emitted from the yellow phosphor. The dominant wavelength of this white light W is 450 nm. The dominant wavelength of the blue light excitation light L1 emitted from the blue LED excitation light source 40 is almost the same as the dominant wavelength of the white light W, 450 nm. Thus, the dominant wavelength of the blue light excitation light L1 emitted from the blue LED excitation light source 40 is shorter than 500 nm.

[0031] The excitation light final irradiation surface 41 is provided on a surface of the excitation light source 40 facing a secondary light exit surface 52 of the light conversion unit 5 described below. The excitation light final irradiation surface 41 finally irradiates the excitation light L1 emitted from the excitation light source 40 to the light conversion unit 5.

[0032] The excitation light source 40 is disposed on the lamp lens 3 side and below the light conversion unit 5. As a result, the excitation light final irradiation surface 41 is disposed on the lamp lens 3 side and below the secondary light emission surface 52 of the light conversion unit 5. The excitation light final irradiation surface 41 is disposed parallel to the emission direction D of the secondary light L2. That is, the excitation light final irradiation surface 41 is disposed in the horizontal direction.

[0033] (Explanation of light conversion unit 5) The light conversion unit 5 is disposed in the lamp chamber 23, as shown in Fig. 1. The light conversion unit 5 has a substrate (support substrate) 50, a light emitting film (light emitting layer) 51, a secondary light emission surface 52, a reflection film (reflection layer) 53, a reflection surface 54, and sealing materials 55 and 56, as shown in Figs. 1, 2, and 3.

[0034] The light converting unit 5 is arranged facing downward at an arrangement angle θ3 (about 45° in this example) larger than 0° with respect to the normal N1 of the emission direction D of the secondary light L2. That is, the light converting unit 5 is arranged facing downward at an arrangement angle θ3 (about 45° in this example) larger than 0° with respect to the vertical.

[0035] The substrate 50 is made of a light-transmitting resin material such as PMMA or PC, or a light-transmitting glass, which transmits the excitation light L1 and the secondary light L2 described below. The substrate 50 may be flexible or rigid. The substrate 50 has a rectangular, square, or free-form plate shape.

[0036] The luminescent film 51 is formed (deposited) on one surface of the substrate 50 (the surface opposite to the surface facing the lamp lens 3). The luminescent film 51 uses an organic material with a dominant wavelength of 630 nm. The material of the luminescent film 51 may be at least one of an organic fluorescent material, an organic phosphorescent material, and an inorganic fluorescent material. The luminescent film 51 emits secondary light (see the dashed arrows in Figures 1 and 3) in all directions (see the circle in Figure 3) by the excitation light L1 irradiated from the final excitation light irradiation surface 41 of the excitation light irradiation unit 4.

[0037] The secondary light L2 is yellow-orange light A shown by the dashed-dotted curve in FIG. 4, or red light R shown by the solid-line curve in FIG. 4. The dominant wavelength of the yellow-orange light A is 590 nm, which is longer than 500 nm. The dominant wavelength of the red light R is 650 nm, which is longer than 500 nm. Thus, the dominant wavelength of the secondary light L2 is longer than 500 nm and longer than the dominant wavelength of the excitation light L1, 450 nm. Note that the secondary light L2 in this example is red light R for a tail lamp. The red light R is used for stop lamps and tail / stop lamps in addition to tail lamps. Also, the yellow-orange light A is used for turn signal lamps.

[0038] The luminescent film 51 has a secondary light emitting surface 52. The secondary light emitting surface 52 is provided on the surface of the luminescent film 51 facing the substrate 50 (the surface facing the lamp lens 3). The secondary light emitting surface 52 emits secondary light L2 toward the lamp lens 3. The secondary light emitting surface 52 has a rectangular, square, or free-form planar shape that is one size smaller than the substrate 50. The emission direction D of the secondary light L2 emitted from the secondary light emitting surface 52 toward the lamp lens 3 is the horizontal direction, as shown in FIG. 8.

[0039] The secondary light exit surface 52 is arranged so as to face downward at an angle θ3 (about 45° in this example) larger than 0° with respect to the normal N1 of the emission direction D of the secondary light L2 based on the arrangement of the light conversion unit 5. That is, the secondary light exit surface 52 is arranged so as to face downward at an angle θ3 (about 45° in this example) larger than 0° with respect to the vertical.

[0040] In the vehicle lamp 1A, the secondary light L2 emitted from the rectangular secondary light emission surface 52 can have a rectangular, square or free-form surface emission. The total light emission area of ​​the secondary light emission surface 52 is 10 mm 2 This makes it possible to satisfy vehicle regulations regarding brightness.

[0041] The reflective film 53 is formed (deposited) on one surface of the substrate 50 so as to cover the light emitting film 51. The reflective film 53 is made of a reflective material having a reflectance of 20% or more in the wavelength region of visible light, such as a metal material such as aluminum, silver, other metals, or alloys thereof.

[0042] The metal material of the reflective film 53 has the reflectance shown in Fig. 5. In Fig. 5, the reflectance of tungsten (W), which has low reflectance, at 400 nm, the lower limit of the visible light wavelength range, is 28% or more. As a result, even though the metal material of the reflective film 53 is tungsten (W), the reflectance in the visible light wavelength range is 20% or more. As a result, even if variations in reflectance occur due to manufacturing tolerances, the reflective film 53 can absorb these variations.

[0043] The reflective film 53 has a reflective surface 54. The reflective surface 54 is provided on a surface of the reflective film 53 facing the substrate 50 and the light emitting film 51 (the surface facing the lamp lens 3). The reflective surface 54 reflects the secondary light L2 emitted from the light emitting film 51 toward the light emitting film 51.

[0044] The sealing materials 55 and 56 seal the light emitting film 51 and the reflective film 53 together with the substrate 50. The sealing materials 55 and 56 are composed of a silicone resin, a SiN film or the like 55, and an aluminum wheel 56. Note that the sealing materials 55 and 56 are not limited to this example.

[0045] (Explanation of red lens lamp lens 3) The lamp lens 3 is made up of a red lens. The lamp lens 3 made up of a red lens has the characteristics of the spectral transmittance curve shown in FIG.

[0046] In FIG. 6, the horizontal axis indicates the wavelength of light (unit: nm), and the vertical axis indicates the transmittance of light (unit: %). In FIG. 6, the lamp lens 3 having the spectral transmittance curve characteristics shown by the dashed line has a thickness of 2 mm. Moreover, the lamp lens 3 having the spectral transmittance curve characteristics shown by the solid line has a thickness of 3.2 mm. Furthermore, the red density of the lamp lens 3 shown by the dashed line is equivalent to the red density of the lamp lens 3 shown by the solid line. If the thickness or red density of the lamp lens 3 is different, the characteristic curve will also be different. In FIG. 6, the parts where the dashed line and the solid line overlap are shown by the solid line.

[0047] The thicknesses of the lamp lens 3, 2 mm and 3.2 mm, are typical lamp lens thicknesses for the vehicle lamp 1A. The red color density of the lamp lens 3 is also typical lamp lens thickness for the vehicle lamp 1A. The thickness and red color density of the lamp lens 3 are not particularly limited.

[0048] As shown in Fig. 6, the lamp lens 3 has a transmittance of nearly 0% for light with a wavelength of 550 nm or less, so it transmits very little light with a wavelength of 550 nm or less. On the other hand, as shown in Fig. 6, the lamp lens 3 has a transmittance of nearly 90% for light with a wavelength of 650 nm or more, so it transmits most of the light with a wavelength of 650 nm or more.

[0049] Here, we will explain the case where a variation of 10% occurs in the transmittance of the lamp lens 3 due to manufacturing tolerances. In this case, the transmittance of the excitation light L1 at a wavelength of 500 nm is 10% (see the small black circle above the wavelength of 500 nm in FIG. 6), and the transmittance of the secondary light L2 at a wavelength of 650 nm is 80% (see the small black circle above the wavelength of 650 nm in FIG. 6).

[0050] The lamp lens 3, which is made of a red lens, has a transmittance of nearly 0% for light with a wavelength of 550 nm or less and a transmittance of nearly 90% for light with a wavelength of 650 nm or more, so it can absorb variations in transmittance that occur due to manufacturing tolerances.

[0051] As a result, the lamp lens 3 may be composed of a red lens having a transmittance of 10% or less for the excitation light L1 in the wavelength region of the excitation light L1 whose dominant wavelength is shorter than 500 nm, and a transmittance of 80% or more for the secondary light L2 in the wavelength region of the secondary light L2 whose dominant wavelength is longer than 500 nm.

[0052] As described above, the lamp lens 3 absorbs the excitation light L1 whose main wavelength is shorter than 500 nm and transmits the secondary light L2 whose main wavelength is longer than 500 nm. As a result, the lamp lens 3 does not absorb the excitation light L1 whose main wavelength is shorter than 500 nm, such as blue light, and does not emit it from the lamp chamber 23 to the outside, while it transmits the secondary light L2 whose main wavelength is longer than 500 nm, such as red light R, and emits it from the lamp chamber 23 to the outside.

[0053] (Explanation of Optical Filter 6) The optical filter 6 is disposed in the lamp chamber 23, as shown in Fig. 1, Fig. 7, and Fig. 8. The optical filter 6 is disposed between the final excitation light irradiation surface 41 of the excitation light irradiation unit 4 and the secondary light exit surface 52 of the light conversion unit 5. The optical filter 6 and the excitation light irradiation unit 4 are disposed below the light conversion unit 5.

[0054] The optical filter 6 is disposed at a position outside the emission range of the secondary light L2, as shown in Fig. 1 and Fig. (A) 8. That is, the optical filter 6 is disposed at a position outside the secondary light emission surface 52 of the light conversion unit 5 in a front view seen from the opposite direction to the emission direction of the secondary light L2, as shown in Fig. 8(B).

[0055] The optical filter 6 transmits the excitation light L1 and absorbs the secondary light L2. That is, as shown in Fig. 7(A), the optical filter 6 has a transmittance of 80% in the wavelength range from 200 nm to 500 nm and a transmittance of 30% in the wavelength range from 500 nm to 800 nm.

[0056] 7(B), the emission intensity of the excitation light L1 (e.g., blue light) is reduced from 100% (see the solid line in FIG. 7(B)) before passing through the optical filter 6 to 80% (see the dashed line in FIG. 7(B)) after passing through the optical filter 6. On the other hand, the emission intensity of the secondary light L2 (e.g., red light R) is reduced from 100% (see the solid line in FIG. 7(B)) before passing through the optical filter 6 to 30% (see the dashed line in FIG. 7(B)) after passing through the optical filter 6.

[0057] As a result, the optical filter 6 has a transmittance of 50% or more for a portion of the excitation light L1 (e.g., blue light) and a transmittance of 50% or less for a portion of the secondary light L2 (e.g., red light R). In this manner, the optical filter 6 transmits most of the excitation light L1 and absorbs most of the secondary light L2.

[0058] As a result, as described above, the optical filter 6 is positioned at a position outside the emission range of the secondary light L2 and at a position that does not hinder the emission of the secondary light L2, i.e., at a position outside the secondary light emission surface 52 of the light conversion unit 5 when viewed from the front in the opposite direction to the emission direction of the secondary light L2.

[0059] (Description of Function of First Embodiment) The vehicular lamp 1A according to the first embodiment is configured as described above, and its operation will be described below.

[0060] First, the excitation light source 40 of the excitation light irradiation unit 4 is turned on. Then, excitation light L1 is emitted from the excitation light source 40. The excitation light L1 is irradiated from the excitation light final irradiation surface 41 of the excitation light irradiation unit 4 toward the light conversion unit 5. The excitation light L1 is transmitted through the substrate 50 of the light conversion unit 5 and irradiated to the light emitting film 51.

[0061] As shown in FIG. 3, the light emitting film 51 emits secondary light L2 in all directions in response to excitation light L1.

[0062] A portion of the secondary light L2 passes through the light-emitting film 51 and is reflected by the reflecting surface 54 toward the light-emitting film 51. The reflected secondary light L2 passes through the light-emitting film 51 again and is emitted from the secondary light exit surface 52 toward the lamp lens 3. The remainder of the secondary light L2 is not reflected by the reflecting surface 54, and is emitted from the secondary light exit surface 52 toward the lamp lens 3.

[0063] The excitation light L1 that passes through the luminescent film 51 and reaches the reflective surface 54 is reflected by the reflective surface 54 toward the luminescent film 51, and excites secondary light L2 in the luminescent film 51. The secondary light L2 excited by the excitation light L1 is emitted from the luminescent film 51, and is emitted from the secondary light emission surface 52 toward the lamp lens 3.

[0064] The secondary light L2 (red light R) emitted from the secondary light emission surface 52 toward the lamp lens 3 transmits through the substrate 50, passes through the lamp chamber 23, and transmits through the lamp lens 3 to be irradiated to the outside of the vehicle lamp 1A in a predetermined tail lamp light distribution pattern. At this time, the vehicle lamp 1A can emit light in a rectangular, square, or free-form surface.

[0065] 1, external light (natural light or artificial light) L3 (see the dashed-dotted arrow in FIG. 1) passes through the red-lens lamp lens 3 from outside the vehicle lamp 1A and enters the lamp chamber 23. At this time, external light L4 (see the dashed-line arrow in FIG. 1) that passes through the red-lens lamp lens 3 is light of a red component (red light).

[0066] The red external light L4 that enters the lamp chamber 23 is reflected by the reflecting surface 54 of the light conversion unit 5. The reflected red external light L4 travels through the lamp chamber 23 toward the excitation light irradiation unit 4 and is absorbed by the optical filter 6 along the way. Here, the optical filter 6 has a transmittance of 50% or less for a portion of the secondary light L2 in the wavelength range of the secondary light L2 from 500 nm to 800 nm. As a result, most of the reflected red external light L4 is absorbed by the optical filter 6.

[0067] Here, a case where the optical filter 6 is not provided in Fig. 1 will be described. The reflected external light L4 of red component travels inside the lamp chamber 23 towards the excitation light irradiation unit 4 and is reflected by the excitation light irradiation unit 4. This reflected external light L4 of red component travels in the reverse direction of the optical path, is reflected again by the reflecting surface 54 of the light conversion unit 5, and is transmitted through the lamp lens 3 and emitted to the outside. When the external light L4 of red component emitted to the outside enters the field of vision IP of a person, an external image is seen in the lamp chamber 23 through the lamp lens 3, as described in the above-mentioned Patent Document 1.

[0068] The vehicle lamp 1A of this embodiment 1 is provided with an optical filter 6 within the lamp chamber 23 that transmits the excitation light L1 and absorbs the secondary light L2, so that most of the reflected red external light L4 is absorbed by the optical filter 6, thereby suppressing the phenomenon in which an external image is seen within the lamp chamber 23 through the lamp lens 3.

[0069] (Explanation of Effects of the First Embodiment) The vehicular lamp 1A according to the first embodiment has the above-mentioned configuration and functions, and the effects thereof will be described below.

[0070] The vehicular lamp 1A according to the first embodiment is provided with an optical filter 6 in the lamp chamber 23, which transmits the excitation light L1 and absorbs the secondary light L2. As a result, the vehicular lamp 1A according to the first embodiment can absorb most of the red component external light L4, which is external light L3 and which has entered the lamp chamber 23 from outside the vehicular lamp 1A through the lamp lens 3 having a red lens, by the optical filter 6. As a result, compared to the above-mentioned Patent Document 1, the vehicular lamp 1A according to the first embodiment can suppress the phenomenon in which an external image is seen in the lamp chamber 23 through the lamp lens 3, and can make objects in the lamp chamber 23 invisible.

[0071] In the vehicle lamp 1A according to the first embodiment, the optical filter 6 is disposed between the excitation light irradiation unit 4 and the light conversion unit 5, at a position outside the emission range of the secondary light L2. That is, in the vehicle lamp 1A according to the first embodiment, the optical filter 6 is disposed between the excitation light final irradiation surface 41 of the excitation light irradiation unit 4 and the secondary light emission surface 52 of the light conversion unit 5, at a position outside the secondary light emission surface 52 in a front view seen from the opposite direction to the emission direction of the secondary light L2.

[0072] As a result, the vehicular lamp 1A according to the first embodiment can reduce as much as possible the proportion of the secondary light L2 from the light conversion unit 5 that is absorbed by the optical filter 6. As a result, the vehicular lamp 1A according to the first embodiment can absorb most of the red component external light L4 by the optical filter 6, while emitting most of the secondary light L2 from the light conversion unit 5 to the outside from the lamp lens 3. That is, the vehicular lamp 1A according to the first embodiment can suppress the phenomenon in which an external image is visible in the lamp chamber 23 through the lamp lens 3, making objects in the lamp chamber 23 invisible, and can emit a large amount of secondary light L2 from the lamp lens 3 to satisfy vehicle regulations.

[0073] In the vehicle lamp 1A according to the second embodiment, the light converting unit 5 is disposed facing downward at an angle θ3 greater than 0° with respect to a normal N1 (vertical) of the emission direction D of the secondary light L2, i.e., facing downward at an angle θ3 greater than 0° with respect to the vertical. Moreover, in the vehicle lamp 1A according to the second embodiment, the optical filter 6 and the excitation light irradiation unit 4 are disposed below the light converting unit 5.

[0074] As a result, in the vehicle lamp 1A of this embodiment 2, as shown in FIG. 1, red-component external light L4 that passes through the red-lens lamp lens 3 diagonally from above to below outside the vehicle lamp 1A and enters the lamp chamber 23 is reflected diagonally downward by the reflective surface 54 of the light conversion unit 5 and is absorbed by the optical filter 6.

[0075] As a result, the vehicle lamp 1A according to the second embodiment can prevent red-component external light L4, which has passed through the lamp lens 3 and entered the lamp chamber 23, from being reflected by the reflecting surface 54 of the light conversion unit 5, reflected by the excitation light irradiation unit 4, tracing the reverse optical path, being reflected again by the reflecting surface 54 of the light conversion unit 5, passing through the lamp lens 3 and being emitted to the outside, and entering a person's field of vision IP. In other words, the vehicle lamp 1A according to the second embodiment can prevent the phenomenon in which an external image is seen in the lamp chamber 23 through the lamp lens 3 due to the external light L3 (L4), and can make objects in the lamp chamber 23 invisible.

[0076] In the vehicle lamp 1A according to the first embodiment, the optical filter 6 has a transmittance of 50% or less for a portion of the secondary light L2 (for example, red light R) in the wavelength range of the secondary light L2 from 500 nm to 800 nm. As a result, the vehicle lamp 1A according to the first embodiment can absorb most of the red component external light L4 transmitted through the red lens lamp lens 3 out of the external light L3, so that the phenomenon in which an external image is seen in the lamp chamber 23 through the lamp lens 3 can be further suppressed, and the inside of the lamp chamber 23 can be made to look even more invisible.

[0077] In the vehicular lamp 1A according to the first embodiment, the optical filter 6 has a transmittance of 50% or more for a part of the excitation light L1 (for example, blue light) in the wavelength range of the excitation light L1 from 200 nm to 500 nm. As a result, even if the optical filter 6 is disposed between the excitation light irradiation unit 4 and the light conversion unit 5 in the vehicular lamp 1A according to the first embodiment, the optical filter 6 can transmit most of the excitation light L1 irradiated from the excitation light irradiation unit 4 toward the light conversion unit 5. This allows the vehicular lamp 1A according to the first embodiment to achieve both invisibility and compliance with vehicle regulations.

[0078] In the vehicle lamp 1A according to the first embodiment, at least the inner surface of the lamp housing 2 is black. This makes it possible for the vehicle lamp 1A according to the first embodiment to further suppress the phenomenon in which an external image is visible in the lamp chamber 23 through the lamp lens 3, and to make objects in the lamp chamber 23 invisible.

[0079] (Description of the configuration, operation, and effect of the second embodiment) 9 shows a second embodiment of a vehicle lamp according to the present invention. Hereinafter, the configuration, operation, and effects of a vehicle lamp 1B according to the second embodiment will be described. In the drawing, the same reference numerals as those in FIGS. 1 to 8 denote the same parts.

[0080] The vehicular lamp 1A according to the first embodiment is an example in which the light converting unit 5 is arranged facing downward at an angle θ3 (about 45° in this example) larger than 0° with respect to the normal N1 of the emission direction D of the secondary light L2, that is, facing downward at an angle θ3 (about 45° in this example) larger than 0° with respect to the vertical. In contrast, the vehicular lamp 1B according to the second embodiment is an example in which the light converting unit 5 is arranged in the direction of the normal N1 of the emission direction D of the secondary light L2, that is, in a vertical state (perpendicular state).

[0081] Moreover, the excitation light final irradiation surface 41 is within a range (up, down, left, right) of an arrangement angle θ1 (about 45° in this example) of less than 90° with respect to a normal N drawn from the secondary light exit surface 52 in the emission direction D of the secondary light L2. That is, the excitation light final irradiation surface 41 and the secondary light exit surface 52 face each other.

[0082] The vehicular lamp 1B according to the second embodiment has the above-mentioned configuration, and therefore can achieve the same effects as those of the vehicular lamp 1A according to the first embodiment.

[0083] In the vehicle lamp 1B according to the second embodiment, the excitation light final irradiation surface 41 is within a range (up, down, left, right) of an arrangement angle θ1 (about 45° in this example) of less than 90° with respect to a normal N drawn from the secondary light emission surface 52 in the emission direction D of the secondary light L2. As a result, in the vehicle lamp 1B according to the second embodiment, the excitation light final irradiation surface 41 is arranged on the lamp lens 3 side with respect to the secondary light emission surface 52. As a result, the vehicle lamp 1B according to the second embodiment can efficiently emit the excitation light L1 emitted by the excitation light source 40 from the excitation light final irradiation surface 41 to the light conversion unit 5, so that the secondary light L2 can be efficiently excited in the light conversion unit 5 and emitted to the lamp lens 3 side, and it is possible to achieve both invisibility and satisfaction of vehicle regulations.

[0084] (Description of the configuration, operation, and effect of the third embodiment) 10 shows a vehicle lamp according to a third embodiment of the present invention. Hereinafter, the configuration, operation, and effects of a vehicle lamp 1C according to the third embodiment will be described. In the drawing, the same reference numerals as those in FIGS. 1 to 9 denote the same parts.

[0085] The vehicular lamp 1C according to the third embodiment is a modified example 4C of the excitation light irradiation unit 4 of the vehicular lamp 1B according to the second embodiment.

[0086] That is, the excitation light source 40 of the excitation light irradiation unit 4C is disposed on the opposite side of the lamp lens 3 with respect to the secondary light emission surface 52 of the light conversion unit 5. The excitation light source 40 is disposed at an arrangement angle θ2 (110° in this example) of 90° or more with respect to a normal line N drawn from the secondary light emission surface 52 in the emission direction D. An excitation light emission surface 42 is provided on the surface of the excitation light source 40 facing the lamp lens 3.

[0087] A reflector 43 is disposed on the lamp lens 3 side with respect to the secondary light exit surface 52 as an optical component. The reflector 43 is provided with an excitation light final irradiation surface 41 which is a reflective surface. The excitation light final irradiation surface 41 which is the reflective surface of the reflector 43 faces the excitation light exit surface 42 and the light conversion unit 5, respectively. That is, the excitation light final irradiation surface 41 which is the reflective surface of the reflector 43 is disposed on the lamp lens 3 side with respect to the secondary light exit surface 52, and is disposed at an angle θ1 of less than 90° with respect to a normal N drawn from the secondary light exit surface 52 in the exit direction D.

[0088] Between the excitation light final irradiation surface 41, which is the reflecting surface of the reflector 43 of the excitation light irradiation unit 4C, and the secondary light exit surface 52 of the light conversion unit 5, an optical filter 6 is disposed.

[0089] When the excitation light source 40 is turned on, the excitation light L1 is emitted from the excitation light emission surface 42 to the reflector 43, reflected by the excitation light final irradiation surface 41 of the reflector 43, and finally irradiated from the excitation light final irradiation surface 41 to the light conversion unit 5.

[0090] The vehicular lamp 1C according to the third embodiment has the above-mentioned configuration and action, and therefore can achieve the same effects as the vehicular lamps 1A and 1B according to the first and second embodiments.

[0091] (Description of the configuration, operation, and effect of the fourth embodiment) 11 shows a fourth embodiment of a vehicle lamp according to the present invention. Hereinafter, a description will be given of the configuration, operation, and effects of a vehicle lamp 1D according to the fourth embodiment. In the drawing, the same reference numerals as those in Figs. 1 to 10 denote the same parts.

[0092] The vehicular lamp 1D according to the fourth embodiment is a modified example 4D of the excitation light irradiation unit 4 of the vehicular lamp 1B according to the second embodiment.

[0093] That is, the excitation light source 40 of the excitation light irradiation unit 4D is disposed on the opposite side of the lamp lens 3 with respect to the secondary light emission surface 52 of the light conversion unit 5. The excitation light source 40 is disposed at an arrangement angle θ2 (110° in this example) of 90° or more with respect to a normal line N drawn from the secondary light emission surface 52 in the emission direction D. An excitation light emission surface 42 is provided on the surface of the excitation light source 40 facing the lamp lens 3.

[0094] A light guide 44 is disposed between the lamp lens 3 side and the excitation light source 40 with respect to the secondary light emission surface 52 as an optical component. An incident surface 45 and an excitation light final irradiation surface 41, which is an emission surface, are provided on both end surfaces of the light guide 44. The light guide 44 is bent from the incident surface 45 side to the excitation light final irradiation surface 41 side, which is an emission surface. The incident surface 45 of the light guide 44 faces the excitation light emission surface 42. The excitation light final irradiation surface 41, which is the emission surface of the light guide 44, faces the light conversion unit 5. That is, the excitation light final irradiation surface 41, which is the emission surface of the light guide 44, is disposed on the lamp lens 3 side with respect to the secondary light emission surface 52, and is disposed at an arrangement angle θ1 of less than 90° with respect to a normal N drawn from the secondary light emission surface 52 in the emission direction D.

[0095] Between the excitation light final irradiation surface 41, which is the emission surface of the light guide 44 of the excitation light irradiation unit 4D, and the secondary light emission surface 52 of the light conversion unit 5, an optical filter 6 is disposed.

[0096] When the excitation light source 40 is turned on, the excitation light L1 is emitted from the excitation light emission surface 42, enters the light guide 44 from the entrance surface 45 of the light guide 44, is guided through the light guide 44, and is finally irradiated to the light conversion unit 5 from the exit surface of the light guide 44, which is the final excitation light irradiation surface 41.

[0097] The vehicular lamp 1D according to the fourth embodiment has the above-mentioned configuration and action, and therefore can achieve the same effects as the vehicular lamps 1A, 1B and 1C according to the first, second and third embodiments.

[0098] (Description of the configuration of the fifth embodiment) 12 to 18 show a vehicle lamp according to a fifth embodiment of the present invention. The configuration of the vehicle lamp according to the fifth embodiment will be described below.

[0099] (Description of vehicle lighting fixture 1E) 12 to 14, reference numeral 1E denotes a vehicle lamp according to this embodiment 5. In this example, the vehicle lamp 1E is, as described above, a tail lamp constituting a rear combination lamp.

[0100] The vehicle lamp 1E is attached to each of the left and right sides of the rear of a vehicle (not shown). The light distribution of the tail lamp of the vehicle lamp 1E has a light distribution range (illumination range) at a predetermined angle in the left-right and up-down directions with respect to a reference axis Z (see Figs. 14 to 16). The reference axis Z is parallel to the traveling direction of the vehicle (front-rear direction of the vehicle).

[0101] The vehicle lamp 1E includes a lamp housing 2, an inner panel (inner housing) 20, a lamp lens 3, and a light emitting device 10 of the vehicle lamp according to the fifth embodiment (hereinafter simply referred to as "light emitting device 10").

[0102] (Explanation of lamp housing 2) As described above, the lamp housing 2 is made of a non-light-transmitting material (such as a resin material). In this example, the lamp housing 2 is black. Note that it is sufficient that the inner surface of the lamp housing 2 (the surface facing the lamp chamber 23) is black. The lamp housing 2 may be a color other than black.

[0103] (Explanation of Lamp Lens 3) As described above, the lamp lens 3 is made of a light-transmitting resin material such as PMMA or PC. The lamp lens 3 is a plain outer cover, outer lens, etc. In this example, the lamp lens 3 is made of a red lens. The lamp lens 3 may be made of a colorless lens other than a red lens, or a yellow-orange lens. The lamp lens 3 is attached to the lamp housing 2. As a result, the lamp housing 2 and the lamp lens 3 form a lamp chamber 23 as shown in Figs. 12 to 14.

[0104] (Explanation of inner panel 20) The inner panel 20 is disposed along the lamp lens 3 in a portion from the center to the lower side of the lamp chamber 23. The inner panel 20 is also disposed between the lamp lens 3 and an excitation light irradiation unit 4E (described later) of the light emitting device 10. The inner panel 20 is attached to the lamp housing 2 via an attachment member (not shown).

[0105] The inner panel 20 is made of a light-impermeable material (such as a resin material). In this example, the inner panel 20 is black, similar to the lamp housing 2. Note that it is sufficient that the surfaces of the inner panel 20, that is, the outer surface (the surface facing the lamp lens 3) and the inner surface (the surface facing the lamp chamber 23), are black. The inner panel 20 may be a color other than black, or at least one of the outer surface or the inner surface may be a color other than black or may be metal-deposited.

[0106] (Description of Light Emitting Device 10) As shown in Fig. 16, in this example, three sets of light-emitting devices 10 are arranged on the left and right sides in the lamp chamber 23. As shown in Figs. 14 to 16, each of the three sets of light-emitting devices 10 includes an excitation light irradiation unit 4E and a light conversion unit 5E.

[0107] (Explanation of Excitation Light Irradiation Unit 4E) 14, in this example, the excitation light irradiation unit 4E is disposed in a portion from the center to the lower side in the lamp chamber 23. The excitation light irradiation unit 4E is attached to the lamp housing 2 via an attachment member (not shown). As described above, the inner panel 20 is disposed between the excitation light irradiation unit 4E and the lamp lens 3.

[0108] As shown in Figs. 14 to 16, the excitation light irradiation unit 4E has an excitation light source 40E, a reflector member 41E as an excitation light control member, and a bracket 42E. The excitation light source 40E and the reflector member 41E are attached to the bracket 42E. The excitation light source 40E is disposed on the lamp lens 3 side. The reflector member 41E is disposed on the lamp housing 2 side. The bracket 42E is disposed between the excitation light source 40E and the reflector member 41E. The bracket 42E is attached to the lamp housing 2 side via an attachment member (not shown). As a result, the excitation light irradiation unit 4E is attached to the lamp housing 2 side.

[0109] (Explanation of the excitation light source 40E) 14 to 16, the excitation light source 40E has one substrate 400 and left and right light emitting elements 401L and 401R. The substrate 400 is attached to a bracket 42E via an attachment boss portion 420.

[0110] The light emitting elements 401L, 401R are mounted on the rear surface of the substrate 400, at two locations on the left and right sides of the surface facing the lamp housing 2. In this example, the light emitting elements 401L, 401R are blue LEDs, and blue LEDs with a dominant wavelength of 450 nm are used. The left and right light emitting elements 401L, 401R are composed of one or more blue LEDs. Note that the light emitting elements 401L, 401R may be elements other than blue LEDs, such as LDs (semiconductor lasers).

[0111] The excitation light source 40E emits excitation light L1 (see solid arrow in FIG. 14) from the light emitting elements 401L and 401R. The excitation light L1 emitted from the blue LED light emitting elements 401L and 401R is blue light with a dominant wavelength of 450 nm. Note that the excitation light L1 may be violet or ultraviolet light with a wavelength shorter than that of blue light.

[0112] (Explanation of reflector member 41E) 14 to 16, left and right reflective surfaces 410L, 410R are formed on the front surface of the reflector member 41E, which faces the lamp lens 3. The left and right reflective surfaces 410L, 410R face the left and right light emitting elements 401L, 401R.

[0113] The left and right reflecting surfaces 410L, 410R each have a plurality of segments divided vertically and horizontally. In a longitudinal section (vertical section, cross section in the up-down direction), the plurality of segments of the left and right reflecting surfaces 410L, 410R are arranged on a parabola with the left and right light emitting elements 401L, 401R as their focal points, and in a transverse section (horizontal section, cross section in the left-right direction), the plurality of segments are arranged on a convex curved line that protrudes toward the lamp lens 3 (rear side) at the center and descends toward the lamp housing 2 (front side) on both the left and right sides.

[0114] The multiple segments of the left and right reflecting surfaces 410L and 410R reflect the excitation light L1 emitted from the left and right light emitting elements 401L and 401R in a predetermined direction as excitation reflected light L10 (see the solid arrow in FIG. 14). As a result, the excitation reflected light L10 is controlled to a predetermined light distribution DL and irradiated toward the light conversion unit 5E.

[0115] As shown in the substantially rectangular shape of FIG. 18, the predetermined light distribution DL has a light distribution range (irradiation range of the excitation reflected light L10) that includes at least the light emitting film 51 of the light conversion unit 5E in the light emitting panel 50E described later. The predetermined light distribution DL has uniform luminous intensity (illuminance) in the light distribution range. The predetermined light distribution DL may have a difference in luminous intensity (illuminance) in the light distribution range. In other words, the intensity of light in the light emitting range may change continuously.

[0116] (Explanation of bracket 42E) 14 to 16, the bracket 42E is disposed between the excitation light source 40E and the reflector member 41E. The bracket 42E has a left front plate portion 420L, a right front plate portion 420R, a left side plate portion 421L, a right side plate portion 421R, and a middle side plate portion 421C.

[0117] The left front plate portion 420L faces the left reflecting surface 410L. The right front plate portion 420R faces the right reflecting surface 410R and the substrate 400 of the excitation light source 40E. The substrate 400 is attached to the right front plate portion 420R via the attachment boss portion 420 as described above.

[0118] The left side plate portion 421L is bent from the left side of the left front plate portion 420L and is connected to the left side of the left reflecting surface 410L. The right side plate portion 421R is bent from the right side of the right front plate portion 420R and is connected to the right side of the right reflecting surface 410R. The middle side plate portion 421C is bent from the right side of the left front plate portion 420L and is also bent from the left side of the right front plate portion 420R. As a result, the left front plate portion 420L and the right front plate portion 420R are arranged alternately in the front-rear direction via the middle side plate portion 421C.

[0119] A left window 422L and a right window 422R are provided at the center of the lower edge of the left front plate 420L and the center of the lower edge of the right front plate 420R. As a result, the excitation light L1 emitted from the left and right light emitting elements 401L and 401R passes through the left window 422L and the right window 422R and is incident on the left and right reflecting surfaces 410L and 410R.

[0120] (Explanation of the light conversion unit 5E) 13 to 16, the light conversion unit 5E has a light emitting panel 50E and a stay 51E as a placement member. In this example, the light conversion unit 5E is placed in a portion from the center to the upper side in the lamp chamber 23, that is, above the excitation light irradiation unit 4E.

[0121] (Explanation of the light-emitting panel 50E) The light-emitting panel 50E emits secondary light L2 (see solid arrow in Fig. 14) by the excitation reflected light L10 irradiated from the reflector member 41E, and in this example, emits light from the entire surface as shown in the diagonal grid hatched portion in Fig. 13. The light-emitting panel 50E is similar to the light conversion unit 5 of the first embodiment, and has a substrate (support substrate) 50, a light-emitting film (light-emitting layer) 51, a secondary light emission surface 52, a reflection film (reflection layer) 53, a reflection surface 54, and sealing materials 55 and 56 as shown in Figs. 2 and 3.

[0122] The substrate 50 is as described above, and transmits the reflected excitation light L10 and the secondary light L2 described below. The substrate 50 has a plate shape as shown in Fig. 13 to Fig. 16. The substrate 50 may have a rectangular, square or any other plate shape other than the plate shapes shown in Fig. 13 to Fig. 16. In this example, glass is used as the substrate 50.

[0123] The luminescent film 51 is as described above, and emits secondary light L2 (see dashed arrows in FIG. 14) in all directions by the excitation reflected light L10 irradiated from the reflector member 41E of the excitation light irradiation unit 4E. As a result, in this example, the luminescent film 51 emits light from the entire surface, as shown in the diagonal lattice hatched portion in FIG. 13. Here, the intensity of the secondary light L2 can be adjusted by the film thickness of the luminescent film 51. That is, by increasing the film thickness of the luminescent film 51, the secondary light L2 can be adjusted to be strong, and conversely, by decreasing the film thickness of the luminescent film 51, the secondary light L2 can be adjusted to be weak.

[0124] The luminescent film 51 is formed in an arbitrary design, in this example, a shape slightly smaller than the shape of the substrate 50, as shown in Figures 13 to 16. As a result, the luminescent film 51 forms a luminescent surface in an arbitrary design, as shown in the diagonal lattice hatched portion in Figure 13. The secondary light L2 is as described above, and in this example, is red light.

[0125] (Explanation of the luminous design of the luminous panel 50E) The luminescent design of luminescent panel 50E can be changed as desired by changing the design of luminescent film 51 (pattern, shape, graphics, outline, etc.).

[0126] For example, the light-emitting panel 50E can form different light-emitting patterns in the same light-emitting shape, as shown in Figures 13 to 16 and Figures 17(A), (B), (C), and (D). Figure 17(A) is a full-surface light-emitting pattern. Figure 17(B) is a basket weave pattern. Figure 17(C) is an hemp leaf pattern. Figure 17(D) is a horizontal stripe pattern (a horizontal stripe pattern in which the vertical width of the horizontal stripes is large in the center and gradually decreases toward the top and bottom). Note that Figure 17 is illustrated in grayscale, and the areas shown in dark gray are the light-emitting areas.

[0127] Furthermore, the light-emitting panel 50E can form different light-emitting designs (light-emitting shapes and light-emitting patterns) within a predetermined light distribution DL, as shown in Fig. 18(A), (B), (C), and (D). Fig. 18(A) and (B) show the same light-emitting shape, with Fig. 18(A) showing a full-surface light-emitting pattern and Fig. 18(B) showing a horizontally elongated light-emitting pattern of a group of rods. Fig. 18(C) shows a horizontally elongated light-emitting design with three lines on the top and bottom. Fig. 18(D) shows a horizontally elongated light-emitting design with three lines on the left and right. In Fig. 18, the predetermined light distribution DL is blue in the excited reflected light L10, and the part with diagonal lattice hatching (black in Fig. 18(B)) is red in the secondary light L2.

[0128] 17 and 18 are only examples of some of the light-emitting designs of light-emitting panel 50E, and the number of light-emitting designs for light-emitting panel 50E is infinite.

[0129] (Explanation of stay 51E, first mounting member 511, and second mounting member 512) 14 and 15, the stay 51E has a rectangular bar shape that is flat on the left and right sides. The light emitting panel 50E is attached to one end of the stay 51E via a first attachment member 511. The other end of the stay 51E is attached to the lamp housing 2 via a second attachment member 512.

[0130] At least one of the first mounting member 511 and the second mounting member 512 has a detachable structure. The first mounting member 511 and the second mounting member 512 are formed of, for example, bolts and nuts, magnets, screws, and fitting types.

[0131] The stay 51E disposes the light-emitting panel 50E in a predetermined position within the light distribution DL. That is, the stay 51E inclines the light-emitting surface of the light-emitting film 51, which is the surface of the light-emitting panel 50E, with respect to the irradiation direction of the excitation reflected light L10 from the reflector member 41E, and faces the lamp lens 3. In this example, the substrate 50 of the light-emitting panel 50E faces the lamp lens 3. In addition, the sealing materials 55 and 56 of the light-emitting panel 50E are detachably attached to the stay 51E via the first attachment member 511.

[0132] In this example, the stay 51E, the first mounting member 511, and the second mounting member 512 are black, similar to the lamp housing 2. Note that it is sufficient that the surfaces (surfaces facing the lamp chamber 23) of the stay 51E, the first mounting member 511, and the second mounting member 512 are black. Furthermore, the stay 51E, the first mounting member 511, and the second mounting member 512 may be a color other than black.

[0133] (Explanation of the Function of the Fifth Embodiment) The vehicular lamp 1E according to the fifth embodiment is configured as described above, and its operation will be described below.

[0134] First, when the left and right light emitting elements 401L and 401R of the excitation light source 40E of the excitation light irradiation unit 4E are turned off, the light emitting panel 50E is in a non-light emitting state. Therefore, when looking into the lamp chamber 23 from the lamp lens 3, the light emitting panel 50E in a non-light emitting state is not noticeable, and only the black colors of the lamp housing 2, the stay 51E, the first mounting member 511, and the second mounting member 512 are visible, as shown in Fig. 12. Note that in Fig. 12, the black colors of the lamp housing 2, the stay 51E, the first mounting member 511, and the second mounting member 512 are illustrated without color.

[0135] Then, the left and right light emitting elements 401L and 401R of the excitation light source 40E of the excitation light irradiation unit 4E are turned on. Then, the left and right light emitting elements 401L and 401R emit excitation light L1 (blue light). The excitation light L1 is reflected in a predetermined direction as excitation reflected light L10 by a plurality of segments of the left and right reflecting surfaces 410L and 410R of the reflector member 41E of the excitation light irradiation unit 4E. The excitation reflected light L10 is controlled to a predetermined light distribution DL and is irradiated toward the light conversion unit 5E.

[0136] The luminescent film 51 of the luminescent panel 50E of the light conversion unit 5E emits secondary light L2 (red light) in all directions when irradiated with the excited reflected light L10 controlled to a predetermined light distribution DL.

[0137] A portion of the secondary light L2 passes through the light-emitting film 51 and is reflected by the reflecting surface 54 toward the light-emitting film 51. The reflected secondary light L2 passes through the light-emitting film 51 again and is emitted from the secondary light exit surface 52 toward the lamp lens 3. The remainder of the secondary light L2 is not reflected by the reflecting surface 54, and is emitted from the secondary light exit surface 52 toward the lamp lens 3.

[0138] The excited reflected light L10 that has passed through the luminescent film 51 and reached the reflecting surface 54 is reflected by the reflecting surface 54 toward the luminescent film 51, and excites secondary light L2 in the luminescent film 51. The secondary light L2 excited by the excited reflected light L10 is emitted from the luminescent film 51, and is emitted from the secondary light emission surface 52 toward the lamp lens 3.

[0139] The secondary light L2 emitted from the secondary light emission surface 52 toward the lamp lens 3 transmits through the substrate 50, passes through the lamp chamber 23, and transmits through the lamp lens 3 to be irradiated to the outside of the vehicle lamp 1E in a predetermined light distribution pattern of the tail lamp. At this time, the light emitting film 51 emits light from its surface, forming a light emitting surface as shown in Figs. 13, 17, and 18.

[0140] 13, in the vehicle lamp 1E, the light emitting surface of the light emitting film 51 can be seen through the lamp lens 3 in the upper half of the lamp chamber 23. In the lower half of the lamp chamber 23, the black color (or a color other than black) of the inner panel 20 can be seen.

[0141] (Explanation of Effects of the Fifth Embodiment) The vehicle lamp 1E and the light emitting device 10 of the vehicle lamp 1E according to the fifth embodiment (hereinafter referred to as "vehicle lamp 1E and light emitting device 10") have the above-mentioned configuration and function, and the effects thereof will be described below.

[0142] The vehicle lamp 1E and the light emitting device 10 of this embodiment 5 include an excitation light source 40E that emits excitation light L1, a reflector member 41E as an excitation light control member that controls and irradiates the excitation light L1 emitted from the excitation light source 40E to a predetermined light distribution DL, a light emitting panel 50E that emits and emits secondary light L2 by the excitation reflected light L10 irradiated from the reflector member 41E, and a stay 51E as a positioning member that positions the light emitting panel 50E within the light distribution DL.

[0143] As a result, the vehicle lamp 1E and light emitting device 10 of this embodiment 5 can efficiently irradiate the excitation light L1 from the excitation light source 40E of the excitation light irradiation unit 4E to the light conversion unit 5E as excitation reflected light L10 due to the excitation light control action of the reflector member 41E.

[0144] The vehicle lamp 1E and the light emitting device 10 of this embodiment 5 include at least one of a first mounting member 511 that replaceably mounts the light emitting panel 50E to the excitation light source 40E and the reflector member 41E and the stay 51E of the excitation light irradiation unit 4E, or a second mounting member 512 that replaceably mounts the light emitting panel 50E and the stay 51E of the light conversion unit 5E to the excitation light source 40E and the reflector member 41E of the excitation light irradiation unit 4E.

[0145] As a result, in the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment, the light emitting panel 50E can be replaced by the first mounting member 511 having a detachable structure, or the light emitting panel 50E and the stay 51E can be replaced by the second mounting member 512 having a detachable structure. This allows the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment to easily change the light emitting design of the light emitting panel 50E, and also allows the appearance to be significantly changed.

[0146] In addition, the vehicle lamp 1E and light emitting device 10 of this embodiment 5 can share the lamp housing 2, lamp lens 3, excitation light irradiation unit 4E and stay 51E by using the first mounting member 511, and can replace the light emitting panel 50E of the light conversion unit 5E, or can share the lamp housing 2, lamp lens 3 and excitation light irradiation unit 4E by using the second mounting member 512, and can replace the light emitting panel 50E and stay 51E of the light conversion unit 5E.

[0147] As a result, the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment can share the lamp housing 2, the lamp lens 3, and the excitation light irradiation unit 4E, or can share the lamp housing 2, the lamp lens 3, the excitation light irradiation unit 4E, and the stay 51E. As a result, when the light emitting design of the light emitting panel 50E of the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment is changed, it is only necessary to change the light emitting panel 50E, or the light emitting panel 50E and the stay 51E, and it is not necessary to change many other parts. Therefore, it is not necessary to change the design of the molds, resin materials, optical designs, mounting spaces, layouts, etc. of many other parts, and the manufacturing costs can be reduced accordingly.

[0148] In the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment, the excitation light control member is constituted by a reflector member 41E having reflection surfaces 410L, 410R that control the excitation light L1 as the excitation reflected light L10. As a result, the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment can efficiently irradiate the excitation light L1 toward the light converting unit 5E by reflecting the excitation light L1 as the excitation reflected light L10 by the reflector member 41E and controlling the light distribution DL to a predetermined light distribution DL.

[0149] In the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment, the light emitting panel 50E has a reflective film 53. As a result, the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment can reflect the secondary light L2 emitted by the excitation reflected light L10 toward the lamp lens 3 side by the reflective film 53. This allows the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment to efficiently emit the secondary light L2 to the outside of the vehicle lamp 1E through the lamp lens 3.

[0150] In the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment, the light emitting panel 50E has a substrate 50, a light emitting film 51, a secondary light emission surface 52, a reflective film 53, a reflective surface 54, and sealing materials 55 and 56. As a result, the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment do not require electrical system components such as wiring and connectors in the light emitting panel 50E, and the light emitting panel 50E is thin and lightweight. Moreover, the thin and lightweight light emitting panel 50E can be made inconspicuous so that there is nothing around it.

[0151] In addition, in the vehicle lamp 1E and the light emitting device 10 according to the fifth embodiment, the stay 51E (including the first mounting member 511 and the second mounting member 512) for positioning the light emitting panel 50E within a predetermined light distribution DL similarly does not require electrical system components such as wiring and connectors, and the stay 51E is thin and lightweight. Moreover, the thin and lightweight stay 51E can be made inconspicuous so that there is nothing around it.

[0152] In the vehicle lamp 1E according to the fifth embodiment, at least the surface of the lamp housing 2 facing the lamp chamber 23 is black, so that the light-emitting panel 50E and the stay 51E (including the first mounting member 511 and the second mounting member 512) inside the lamp chamber 23 are inconspicuous due to the black color inside the lamp chamber 23. As a result, in the vehicle lamp 1E according to the fifth embodiment, when the light-emitting elements 401L, 401R are in an extinguished state, when the inside of the lamp chamber 23 is viewed through the lamp lens 3, the light-emitting panel 50E and the stay 51E are inconspicuous, and the black interior of the lamp chamber 23 can be seen, making the inside of the lamp chamber 23 almost invisible.

[0153] On the other hand, in the vehicle lamp 1E according to the fifth embodiment, when the light emitting elements 401L and 401R are turned on, the inconspicuous light emitting panel 50E emits light and becomes conspicuous. As a result, the vehicle lamp 1E according to the fifth embodiment can embody the nearly invisible phenomenon in the black lamp chamber 23 and the light emitting phenomenon of the light emitting panel 50E in the black lamp chamber 23.

[0154] The vehicle lamp 1E of this embodiment 5 has an inner panel 20 disposed between the lamp lens 3 and the excitation light irradiation unit 4E, so that when the interior of the lamp chamber 23 is viewed through the lamp lens 3, the excitation light irradiation unit 4E is covered and hidden by the inner panel 20, improving the appearance of the interior of the lamp chamber 23.

[0155] In the vehicle lamp 1E of this embodiment 5, at least the surface of the lamp housing 2 facing the lamp chamber 23, the surface of the stay 51E (including the first mounting member 511 and the second mounting member 512), and the surface of the inner panel 20 are black, making the inside of the lamp chamber 23 even more invisible.

[0156] The vehicle lamp 1E according to the fifth embodiment has three sets of light emitting devices 10 arranged on the left and right sides in a lamp chamber 23. As a result, the vehicle lamp 1E according to the fifth embodiment can form a light emitting design of a light emitting panel 50E that is long in the left and right directions by the three sets of light emitting devices 10.

[0157] Furthermore, in the vehicle lamp 1E of this embodiment 5, by arbitrarily arranging multiple sets of light-emitting devices 10 left and right, up and down within the lamp chamber 23, it is possible to form a long light-emitting design extending left and right, up and down and diagonally, or a wide light-emitting design extending left and right, up and down and diagonally.

[0158] (Description of Modified Examples of Excitation Light Control Member) Fig. 19 shows a modified example of an excitation light control member for a light emitting device of a vehicle lamp, in which the same reference numerals as those in Figs. 12 to 18 denote the same parts.

[0159] 12 to 18 is a reflector member 41E having reflection surfaces 410L and 410R that control excitation light L1 from excitation light source 40E. The excitation light control member of this modification 1 is an inner lens member 43E. Inner lens member 43E has an entrance surface 430 and an exit surface 431 that control excitation light L1 from excitation light source 40E.

[0160] In this example, the incident surface 430 has a plurality of prism surfaces (refractive surfaces). In this example, the exit surface 431 is a plane. The incident surface 430 and the exit surface 431 emit the excitation light L1 emitted from the excitation light source 40E in a predetermined direction as excitation exit light L11. As a result, the excitation exit light L11 is controlled to a predetermined light distribution DL and irradiated to the light conversion unit 5E side.

[0161] The inner lens member 43E, which is a modified example of the excitation light control member, has the above-mentioned configuration, and therefore can achieve the same effects as the reflector member 41E.

[0162] 14, the substrate 400 of the excitation light source 40E is disposed vertically (up and down), the stay 51E has a horizontal (left and right) rectangular rod shape, and the excitation light source 40E and the reflector member 41E are attached to the bracket 42E. In contrast, in Fig. 19, the substrate 400 of the excitation light source 40E is disposed horizontally (left and right), the stay 52E has an L shape, and the excitation light source 40E, the inner lens member 43E, and the stay 52E are attached to the bracket 44E.

[0163] In this modification, a prism surface is provided on incident surface 430, but a textured finish may be provided instead of the prism surface, or a light diffusion element group (ink or paint) may be contained in inner lens member 43E. The prism surface or textured finish may be provided on exit surface 431, or on both entrance surface 430 and exit surface 431.

[0164] (Description of Modified Examples of Excitation Light Control Member) Fig. 20 shows a modified example of an excitation light control member of a light emitting device of a vehicle lamp, in which the same reference numerals as those in Figs. 12 to 19 denote the same parts.

[0165] 12 to 18 is a reflector member 41E having reflection surfaces 410L and 410R that control the excitation light L1 from the excitation light source 40E. Also, the excitation light control member in Fig. 19 is an inner lens member 43E having an entrance surface 430 and an exit surface 431 that control the excitation light L1 from the excitation light source 40E.

[0166] In contrast to this, the excitation light control member of this modified example is a combination of the reflector member 41E shown in FIGS. 12 to 18 and the inner lens member 43E shown in FIG.

[0167] Since the excitation light control member of this modified example has the configuration described above, it can achieve the same effects as the reflector member 41E of FIGS. 12 to 18 and the inner lens member 43E of FIG.

[0168] 14, the excitation light source 40E is disposed on the lamp lens 3 side, the reflector member 41E is disposed on the lamp housing 2 side, and the excitation light source 40E and the reflector member 41E are attached to the bracket 42E. Also, in FIG. 19, the excitation light source 40E, the inner lens member 43E, and the stay 52E are attached to the bracket 44E.

[0169] In contrast, in FIG. 20, the excitation light source 40E is arranged on the lamp housing 2 side, the reflector member 41E is arranged on the lamp lens 3 side, and the excitation light source 40E, the reflector member 41E, the inner lens member 43E and the stay 52E are attached to the bracket 45E.

[0170] (Description of Modification of Light Conversion Unit 53E) Fig. 21 shows a modified example of a light converting unit 53E of a light emitting device for a vehicle lamp. In Fig. 21, the same reference numerals as in Figs. 12 to 20 indicate the same parts.

[0171] The light conversion unit 5E of Fig. 12 to Fig. 20 has one light emitting panel 50E, and one end of the square rod-shaped stay 51E and one end of the L-shaped stay 52E are not separated. In contrast, the light conversion unit 53E of this modification has a plurality of light emitting panels 50E (two in this example) on the top and bottom, and one end of the stay 54E is separated into a plurality of upper and lower parts (two-pronged in this example). As a result, the light conversion unit 53E of this modification is suitable for forming a light emitting design of three horizontally elongated stripes on the top and bottom as shown in Fig. 18(C).

[0172] Furthermore, the light conversion unit 53E of this modified example is suitable for forming an illuminating design of three horizontal V patterns on the left and right as shown in Figure 18 (D) by arranging multiple light-emitting panels 50E on the left and right and dividing one end of the stay 54E into multiple parts on the left and right.

[0173] Furthermore, since the light converting unit 53E of this modified example has the above-mentioned configuration, it can achieve the same effects as the light converting unit 5E.

[0174] 14, the light converting unit 5E is disposed above the excitation light irradiating unit 4E, whereas in Fig. 21, the light converting unit 53E is disposed below the excitation light irradiating unit 4E.

[0175] (Description of Modifications of Light-Emitting Panel 50A) Fig. 22 shows a modified example of a light emitting panel 50A of a light emitting device for a vehicle lamp. In Fig. 22, the same reference numerals as in Figs. 12 to 21 denote the same parts.

[0176] The light-emitting panel 50E has a reflective film 53. In contrast, the light-emitting panel 50A of this modification does not have a reflective film 53. That is, the light-emitting panel 50A of this modification has a substrate 50, a light-emitting film 51, and a sealing material 57 (light-transmitting aluminum (Al2O3) or the like).

[0177] The light-emitting panel 50A of this modification can achieve substantially the same effects as the light-emitting panel 50E described above. In particular, since the light-emitting panel 50A of this modification is made of a light-transmitting member, when the light-emitting elements 401L and 401R are not lit, the light-emitting panel 50A is in a transparent and invisible state (invisible state) when the inside of the lamp chamber 23 is viewed through the lamp lens 3 as shown in FIG.

[0178] Furthermore, if at least the surface of the lamp housing 2 facing the lamp chamber 23, the surfaces of the stays 51E, 52E, 54E and the surfaces of the first mounting member 511 and the second mounting member 512, and the surface of the inner panel 20 are black, the presence of the light-emitting panel 50A of this modified example becomes even less noticeable, making the interior of the lamp chamber 23 invisible.

[0179] (Description of Examples Other Than Embodiments 1, 2, 3, 4, 5, and Modifications) In the above-mentioned first, second, third, fourth, fifth and modified embodiments, an example is described in which the vehicular lamps 1A, 1B, 1C, 1D and 1E are tail lamps constituting a rear combination lamp, and the secondary light L2 is red light R. However, in this invention, the vehicular lamps 1A, 1B, 1C, 1D and 1E may be stop lamps, tail stop lamps or turn signal lamps other than tail lamps. In the case of a stop lamp or tail stop lamp, the secondary light L2 is red light R, and in the case of a turn signal lamp, the secondary light L2 is yellow-orange light A.

[0180] In the optical filter 6 in the first, second, third, fourth, fifth and modified embodiments, a part of the excitation light L1 has a transmittance of 50% or more in the wavelength range of the excitation light L1 from 200 nm to 500 nm, and a part of the secondary light L2 has a transmittance of 50% or less in the wavelength range of the secondary light L2 from 500 nm to 800 nm. However, in the present invention, the numerical values ​​of the transmittance of the excitation light L1 and the transmittance of the secondary light L2 of the optical filter 6 are not limited.

[0181] Furthermore, in the above-described first embodiment, the light conversion unit 5 is arranged facing downward, and the optical filter 6 and the excitation light irradiation unit 4 are arranged below the light conversion unit 5. However, in the present invention, the light conversion unit 5 may be arranged facing in a direction other than downward. In this case, the optical filter 6 and the excitation light irradiation unit 4 are arranged in the direction in which the light conversion unit 5 faces.

[0182] It should be noted that the present invention is not limited to the above-mentioned first, second, third, fourth, fifth and modified examples. For example, the shape of the surface emission is not particularly limited. That is, the secondary light emission surface 52 has a rectangular, square or free-form planar shape, but may also be a curved surface. In this way, surface emission of any design shape can be obtained.

[0183] In the fifth embodiment and the modified example, the excitation light control member is a reflector member 41E, an inner lens member 43E, or a combination of the reflector member 41E and the inner lens member 43E. However, in the present invention, the excitation light control member may be, other than the above members, for example, a light guide member (light guide plate, light guide rod) having an incident surface, an exit surface, and a total reflection surface. In short, it is sufficient if it is a member that controls the excitation light L1 from the excitation light source 40E and irradiates it to the light-emitting panel 50E. [Explanation of symbols]

[0184] 1A, 1B, 1C, 1D Vehicle lights 2 Lamp housing 23 Light room 3 Lamp Lens 4, 4C, 4D Excitation Light Irradiation Unit 40 Excitation Light Source 41: final excitation light irradiation surface (reflecting surface of reflector 43, exit surface of light guide 44) 42 Exit surface 43 Reflector (optical component) 44 Light guide (optical component) 45 Incidence plane 5. Optical conversion unit 50 Substrates 51 Luminescent film (luminescent layer) 52 Secondary light exit surface 53 Reflective film (reflective layer) 54 Reflective surface 55 Encapsulating materials 56 Encapsulating materials 6 Optical Filters A Yellow-orange light D Output direction IP Human Vision L1 excitation light L2 secondary light L3 External light L4 External light N Normal N1 Normal R red light W white light θ1 Placement angle θ2 Placement angle θ3 Placement angle 1E Vehicle lighting fixtures 10 Light emitting device 4E Excitation light irradiation unit 40E Excitation Light Source 400 Substrates 401L, 401R Light emitting element 41E Reflector material 410L, 410R reflective surface 42E Bracket 420 Mounting boss 420L Left front panel 420R Right front panel 421C Intermediate side plate 421L Left side plate 421R Right side plate 422L Left window 422R Right window 43E Inner lens material 430 Entrance plane 431 Exit surface 44E Bracket 45E Bracket 5E Optical conversion unit 50E Light-emitting panel 51E Stay 511 First mounting member 512 Second mounting member 52E Stay 53E Optical conversion unit 54E Stay 50A Light Emitting Panel 57 Encapsulating materials After B DE Down DL Light Distribution Before F L left L10 Excitation reflected light L11 Excitation emission light R right U Top Z reference axis

Claims

1. a lamp housing and a lamp lens forming a lamp chamber; An excitation light irradiation unit, a light conversion unit, and an optical filter arranged in the lamp chamber; Equipped with The excitation light irradiation unit irradiates the light conversion unit with excitation light, The light conversion unit emits secondary light by the excitation light irradiated from the excitation light irradiation unit and emits the secondary light toward the lamp lens. the optical filter transmits the excitation light and absorbs the secondary light; The excitation light irradiation unit includes: an excitation light source that emits the excitation light; an excitation light final irradiation surface that finally irradiates the excitation light emitted from the excitation light source onto the light conversion unit; having The light conversion unit is a light-emitting film that emits the secondary light by the excitation light irradiated from the final excitation light irradiation surface; a reflective film that reflects the secondary light emitted from the light-emitting film toward the light-emitting film; A secondary light exit surface that outputs the secondary light toward the lamp lens; having The optical filter includes: Between the final excitation light irradiation surface of the excitation light irradiation unit and the secondary light emission surface of the light conversion unit, at a position away from the secondary light emission surface in a front view seen from the opposite direction to the emission direction of the secondary light, Located, A vehicle lamp characterized by the above.

2. The optical filter is disposed between the excitation light irradiation unit and the light conversion unit and at a position outside the emission range of the secondary light.

2. The vehicle lamp according to claim 1.

3. The light converting unit is arranged at an angle greater than 0° with respect to a normal to the emission direction of the secondary light.

3. A vehicle lamp according to claim 1 or 2.

4. The light conversion unit is arranged at an angle greater than 0° with respect to the vertical.

3. A vehicle lamp according to claim 1 or 2.

5. The light converting unit is arranged with the secondary light emitting surface facing downward at an angle greater than 0° with respect to a normal to the emission direction of the secondary light, The optical filter and the excitation light irradiation unit are disposed below the light conversion unit.

2. The vehicle lamp according to claim 1.

6. The light conversion unit is arranged with the secondary light emission surface facing downward at an angle greater than 0° with respect to the vertical, The optical filter and the excitation light irradiation unit are disposed below the light conversion unit.

2. The vehicle lamp according to claim 1.

7. The lamp lens is composed of a red lens, The excitation light has a dominant wavelength shorter than 500 nm, The secondary light has a dominant wavelength longer than 500 nm, The optical filter includes: In the wavelength range of the excitation light from 200 nm to 500 nm, a portion of the excitation light has a transmittance of 50% or more; In the wavelength range of the secondary light from 500 nm to 800 nm, a portion of the secondary light has a transmittance of 50% or less.

7. A vehicle lamp according to claim 1, wherein the first and second electrodes are arranged in a first direction.

8. At least a surface of the lamp housing facing the lamp chamber is black.

8. A vehicle lamp according to claim 1, wherein the first and second electrodes are arranged in a first direction.

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