Light emitting device for vehicle lamp, vehicle lamp

Abstract

To provide a light emitting device of a vehicle lamp which can obtain a plurality of light emitting functions, and the vehicle lamp.SOLUTION: Three light emitting units 1U, 2U and 3U have: excitation light sources 1L, 2L and 3L for radiating excitation light L11, L12 and L13; and light emitting panels 1P, 2P and 3P for emitting light by radiating secondary light L21, L22 and L23 by being excited by the excitation light L11, L12 and L13. The first light emitting unit 1U is arranged at one face side of an excitation light filter 1F, and at a center side of a vehicle. The second light emitting unit 2U is arranged at the other face side of the excitation light filter 1F. The third light emitting unit 3U is arranged at one face side of the excitation light filter 1F, and at the outside of the vehicle. The excitation light filter 1F does not allow the permeation of the excitation light L11, L12 and L13.SELECTED DRAWING: Figure 5

Description

[Technical field]

[0001] The present invention relates to a light emitting device for a vehicle lamp. [Background technology]

[0002] 2. Description of the Related Art A light-emitting device for a vehicle lamp that utilizes secondary light emitted by excitation with excitation light and a vehicle lamp are disclosed in, for example, Patent Document 1.

[0003] The light source unit of the vehicle lamp of Patent Document 1 includes a light source section and a light generating section having a light emitting layer. The vehicle lamp of Patent Document 1 includes the light source unit, and a lamp housing and a lamp lens that accommodate the light source unit.

[0004] The light source unit of the vehicle lamp and the operation of the vehicle lamp of Patent Document 1 will be described below. The light emitting layer of the light generating section is excited by the excitation light emitted from the light source section, and emits secondary light in a predetermined emission pattern. The secondary light is also irradiated to the outside through the lamp lens as a light distribution pattern such as a tail lamp. [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] However, the light source unit and vehicle lamp of Patent Document 1 include one light source section and one light generating section, and therefore the light emission pattern of the light generating section is limited to one. As a result, the light source unit and vehicle lamp of Patent Document 1 cannot achieve a multiple light emitting function.

[0007] An object of the present invention is to provide a light emitting device for a vehicle lamp and a vehicle lamp which are capable of providing a plurality of light emitting functions. [Means for solving the problem]

[0008] The light emitting device for a vehicle lamp of the present invention is a light emitting device for a vehicle lamp comprising a plurality of light emitting units and an excitation light filter, each of the plurality of light emitting units having an excitation light source that emits excitation light and a light emitting panel that is excited by the excitation light and emits secondary light to emit light, the plurality of light emitting units being arranged at least one on each of one side and the other side of the excitation light filter, and the excitation light filter does not transmit the excitation light.

[0009] In the light-emitting device of the vehicle lamp of the present invention, it is preferable that each of the light-emitting panels of the multiple light-emitting units has a light-emitting film formed on one side or the other side of the excitation light filter, and serves as a light conversion film that is excited by the excitation light to emit secondary light and emit light, and that the light-emitting film is formed in any shape.

[0010] In the light-emitting device of the vehicle lamp of the present invention, it is preferable to provide an excitation light control member that controls the excitation light from the excitation light sources of each of the multiple light-emitting units and prevents the excitation light from the excitation light source of one light-emitting unit from straying and entering the light-emitting panel of another light-emitting unit as stray excitation light.

[0011] In the light emitting device of the vehicle lamp of the present invention, it is preferable that the excitation light control member has at least one of a reflecting member that reflects the excitation light in a predetermined direction, a lens member that refracts the excitation light at a predetermined angle at at least one of the incident surface and the exit surface, a light guiding member that guides the excitation light incident from the incident surface to the exit surface and emits it to the outside from the exit surface, and a shielding member that shields stray excitation light.

[0012] In the light emitting device of the vehicle lamp of the present invention, it is preferable that the excitation light filter is a transparent plate that does not transmit excitation light having a wavelength in the range of at least about 300 nm to about 500 nm, and transmits secondary light emitted from the light emitting panel having a wavelength in the range of at least about 500 nm to about 780 nm with a transmittance of at least about 90%.

[0013] The vehicle lamp of the present invention is characterized by comprising a lamp chamber forming member that forms a lamp chamber, and a light emitting device of the vehicle lamp of the present invention that is arranged within the lamp chamber.

[0014] In the vehicle lamp of the present invention, it is preferable that the vehicle lamp comprises at least one of a reflector arranged within the lamp chamber for reflecting secondary light from the light-emitting device to the outside of the lamp chamber, or a reflector for reflecting excitation light from the light-emitting device towards the light-emitting panel of the light-emitting device.

[0015] In the vehicle lamp of the present invention, it is preferable that the lamp chamber forming member has an outer lens that does not transmit excitation light from the light emitting device but transmits secondary light from the light emitting device.

[0016] In the vehicle lamp of the present invention, the lamp chamber forming member has an outer lens that does not transmit excitation light from the light emitting device but transmits secondary light from the light emitting device, and it is preferable that the outer lens is red or yellow-orange, the excitation light is blue light, and the secondary light is red light or yellow-orange light. Effect of the Invention

[0017] The light emitting device for a vehicle lamp and the vehicle lamp of the present invention can provide a plurality of light emitting functions. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a front view of a vehicle lamp in a non-lighted state (light-off state, the same applies below) showing a light-emitting device for a vehicle lamp and a first embodiment of the vehicle lamp according to the present invention. [Diagram 2]FIG. 2 is a front view of the vehicle lamp showing a state in which a first light-emitting panel of a first light-emitting unit is emitting light. [Diagram 3] FIG. 3 is a front view of the vehicle lamp showing a state in which the first light-emitting panel of the first light-emitting unit and the second light-emitting panel of the second light-emitting unit are simultaneously emitting light. [Figure 4] FIG. 4 is a front view of the vehicle lamp illustrating a state in which the first light-emitting panel of the first light-emitting unit, the second light-emitting panel of the second light-emitting unit, and the third light-emitting panel of the third light-emitting unit are simultaneously emitting light. [Diagram 5] Fig. 5 is an explanatory cross-sectional view showing a light emitting device of a vehicle lamp. (A) is an explanatory cross-sectional view taken along line AA in Fig. 1. (B) is an explanatory cross-sectional view taken along line BB in Fig. 2. (C) is an explanatory cross-sectional view taken along line CC in Fig. 3. (D) is an explanatory cross-sectional view taken along line DD in Fig. 4. [Figure 6] FIG. 6 is an explanatory vertical cross-sectional view (an explanatory cross-sectional view taken along line VI-VI in FIG. 1) showing a light-emitting device of a vehicle lamp and a vehicle lamp in a non-lighted state. [Figure 7] FIG. 7 is a vertical cross-sectional view (a cross-sectional view taken along line VII-VII in FIG. 2) showing a state in which a first light-emitting panel of a first light-emitting unit is emitting light. [Figure 8] FIG. 8 is a longitudinal cross-sectional explanatory diagram (a cross-sectional explanatory diagram taken along line VIII-VIII in FIG. 1) showing a light-emitting device of a vehicle lamp and a vehicle lamp in a non-lighted state. [Figure 9] FIG. 9 is a vertical cross-sectional view (cross-sectional view taken along line IX-IX in FIG. 3) showing a state in which the first light-emitting panel of the first light-emitting unit and the second light-emitting panel of the second light-emitting unit are simultaneously emitting light. [Figure 10] FIG. 10 is an explanatory cross-sectional view (an explanatory cross-sectional view taken along line AA in FIG. 1, corresponding to FIG. 5(A)) showing a light-emitting device of a vehicle lamp and a state of the vehicle lamp when not lit. [Figure 11]Figure 11 is a longitudinal cross-sectional view (a cross-sectional view taken along line DD in Figure 4 and corresponding to Figure 5(D)) showing a state in which the first light-emitting panel of the first light-emitting unit, the second light-emitting panel of the second light-emitting unit, and the third light-emitting panel of the third light-emitting unit are emitting light simultaneously. [Figure 12] Fig. 12(A) is a partially enlarged schematic vertical sectional view showing a light-emitting panel, and Fig. 12(B) is a partially enlarged explanatory diagram showing the optical path of excitation light and the optical path of secondary light in the light-emitting panel. [Figure 13] FIG. 13 is an explanatory vertical cross-sectional view (corresponding to FIGS. 6 and 8) showing a light-emitting device of a vehicle lamp and a state in which the light-emitting panel appears transparent when the vehicle lamp is not lit. [Figure 14] FIG. 14 is an explanatory diagram showing the luminous design of the luminous film of the luminous panel. [Figure 15] FIG. 15 is an explanatory diagram showing the luminous design of the luminous film of a luminous panel arranged within a predetermined light distribution. [Figure 16] FIG. 16 is an explanatory diagram showing a light emitting device of a vehicle lamp and a state of segment light emission of the vehicle lamp. [Figure 17] FIG. 17 is a front view of a vehicle lamp in an unlit state, showing a light emitting device for a vehicle lamp and a vehicle lamp according to a second embodiment of the present invention. [Figure 18] FIG. 18 is a front view of the vehicular lamp showing a state in which the first light-emitting panel of the first light-emitting unit is emitting light. [Figure 19] Fig. 19(A) is a partially enlarged schematic vertical sectional view showing a light-emitting panel, and Fig. 19(B) is a partially enlarged explanatory diagram showing the optical path of excitation light and the optical path of secondary light in the light-emitting panel. [Figure 20] FIG. 20 is an explanatory vertical cross-sectional view (corresponding to FIG. 13) showing a state in which the light-emitting device of the vehicle lamp and the light-emitting panel are visible through the outer lens when the vehicle lamp is not lit. [Figure 21] FIG. 21 is a vertical cross-sectional view (corresponding to FIGS. 7 and 9) showing a first modified example of the light emitting device of the vehicle lamp and the excitation light control member of the vehicle lamp according to the present invention. [Figure 22] FIG. 22 is a vertical cross-sectional view (corresponding to FIGS. 7, 9 and 21) showing a second modified example of the light emitting device of the vehicle lamp and the excitation light control member of the vehicle lamp according to the present invention. [Diagram 23] FIG. 23 is a partial vertical cross-sectional view (corresponding to FIGS. 7, 9, 21 and 22) showing a third modified example of the light emitting device and the excitation light control member of the vehicle lamp according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, two embodiments (examples) of the light-emitting device for a vehicle lamp and the vehicle lamp according to the present invention will be described with reference to the drawings. In this specification, the terms front, rear, top, bottom, left, and right refer to the front, rear, top, bottom, left, and right when the light-emitting device for a vehicle lamp and the vehicle lamp according to the present invention are installed on a vehicle.

[0020] 1 to 4, 6 to 11, 17, 18, 21 to 23, the symbols "F" and "B" stand for "front", "rear", "U" for "up", "D" for "down", "L" for "left" and "R" for "right". Here, the front refers to the rear surface of the vehicle, and the back refers to the front surface of the vehicle.

[0021] In addition, since the drawings are schematic diagrams showing the light-emitting device of the vehicle lamp and the vehicle lamp according to the present invention, the light-emitting device of the vehicle lamp and the main components of the vehicle lamp according to the present invention are shown, and components other than the main components are omitted. Also, some hatching is omitted.

[0022] (Description of the configuration of the first embodiment) 1 to 16 show a light emitting device for a vehicle lamp and a vehicle lamp according to a first embodiment of the present invention. Hereinafter, the configurations of the light emitting device for a vehicle lamp and the vehicle lamp according to the first embodiment will be described.

[0023] (Description of vehicle lighting fixture 100A) 1 to 4, 6 to 11, 13, and 16, reference numeral 100A denotes a vehicle lamp according to the first embodiment. In this example, the vehicle lamp 100A is a tail lamp constituting a rear combination lamp. Note that the vehicle lamp 100A may be a stop lamp, a tail stop lamp, or a turn signal lamp other than a tail lamp.

[0024] The vehicular lamp 100A is attached to both the left and right sides of the rear of a vehicle (not shown). The vehicular lamp 100A in this example is attached to the right side of the vehicle. The vehicular lamp attached to the left side of the vehicle has a configuration obtained by inverting the configuration of the vehicular lamp 100A in this example attached to the right side of the vehicle. For this reason, a description of the vehicular lamp attached to the left side of the vehicle will be omitted.

[0025] The light distribution of the tail lamp of the vehicle lamp 100A 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. 6 to 10). The reference axis Z is parallel to the traveling direction of the vehicle (the front-rear direction of the vehicle, the vehicle track number).

[0026] The vehicle lamp 100A comprises a lamp housing 100, a lamp lens 101 as an outer lens, an inner panel (inner housing) 102, a reflector 103, and a light emitting device 1A of the vehicle lamp according to this embodiment 1 (hereinafter referred to as "light emitting device 1A").

[0027] The lamp housing 100 is made of a non-light-transmitting material (such as a resin material). In this example, the lamp housing 100 is black. Note that it is sufficient that the inner surface of the lamp housing 100 (the surface facing the lamp chamber 104) is black. The lamp housing 100 may be a color other than black.

[0028] The lamp lens 101 is made of a light-transmitting resin material such as PMMA or PC, or light-transmitting glass. The lamp lens 101 is a plain outer cover, outer lens, or the like. In this example, the lamp lens 101 is made of a red lens. The red lamp lens 101 absorbs blue excitation light L11, L12, and L13, which will be described later, from the light emitting device 1A. This allows the vehicle lamp 100A to eliminate variations in chromaticity of the light irradiated (emitted) from the lamp lens 101 and to comply with regulations for tail lamps.

[0029] The lamp lens 101 may be a colorless lens other than a red lens, or a yellow-orange lens. The lamp lens 101 is attached to the lamp housing 100. As a result, the lamp housing 100 and the lamp lens 101 form a lamp chamber 104. The lamp housing 100 and the lamp lens 101 constitute a lamp chamber forming member.

[0030] The inner panel 102 is disposed along the lamp lens 101 in the upper and lower portions from the center of the lamp chamber 104. The inner panel 102 is disposed between the lamp lens 101 and excitation light sources 1L, 2L, and 3L and excitation light control members 1C, 2C, and 3C of the light emitting device 1A, which will be described later. The inner panel 102 is attached to the lamp housing 100 via an attachment member (not shown).

[0031] The inner panel 102 is made of a light-impermeable material (such as a resin material). In this example, the inner panel 102 is black, similar to the lamp housing 100. Note that it is sufficient that the surfaces of the inner panel 102, that is, the outer surface (the surface facing the lamp lens 101) and the inner surface (the surface facing the lamp chamber 104), are black. The inner panel 102 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.

[0032] 5, 8 to 11, the reflector 103 is disposed between the lamp housing 100 and a second light-emitting panel 2P of a second light-emitting unit 2U of the light-emitting device 1A, which will be described later, and a second filter portion 12F of an excitation light filter 1F, which will be described later. The reflector 103 is attached to the lamp housing 100 via an attachment member (not shown), similar to the inner panel 102. The reflector 103 reflects the 2-2nd order light L22 from the second light-emitting unit 2U to the outside of the lamp chamber 104, that is, from inside the lamp chamber 104, through the lamp lens 101 and to the outside of the lamp chamber 104.

[0033] (Description of Light Emitting Device 1A) 10 and 11, the light emitting device 1A is attached to the lamp housing 100 via a bracket 105 serving as an attachment member. As shown in Fig. 5 to Fig. 11, the light emitting device 1A includes a plurality of light emitting units 1U, 2U, and 3U (three in this example), an excitation light filter 1F, and a plurality of excitation light control members 1C, 2C, and 3C (three in this example, the same number as the light emitting units 1U, 2U, and 3U).

[0034] (Explanation of light-emitting units 1U, 2U, 3U, and excitation light control members 1C, 2C, 3C) In this example, the three light-emitting units 1U, 2U, 3U and the three excitation light control members 1C, 2C, 3C are referred to as, from the left side of the vehicle (the center of the vehicle) to the right side of the vehicle (the outside of the vehicle), the first light-emitting unit 1U, the second light-emitting unit 2U, the third light-emitting unit 3U, the first excitation light control member 1C, the second excitation light control member 2C, and the third excitation light control member 3C.

[0035] The first light-emitting unit 1U and the first excitation light control member 1C, the second light-emitting unit 2U and the second excitation light control member 2C, and the third light-emitting unit 3U and the third excitation light control member 3C respectively constitute three independent assemblies.

[0036] The first light-emitting unit 1U and the first excitation light control member 1C are disposed on one surface side (the surface side facing the lamp lens 101) of the excitation light filter 1F, on the left side and lower side in the lamp chamber 104. The second light-emitting unit 2U and the second excitation light control member 2C are disposed on the other surface side (the surface side facing the lamp housing 100) of the excitation light filter 1F, on the center and upper side in the lamp chamber 104. The third light-emitting unit 3U and the third excitation light control member 3C are disposed on one surface side of the excitation light filter 1F, on the right side and lower side in the lamp chamber 104.

[0037] (Explanation of 1U, 2U, and 3U light emitting units) The three light-emitting units 1U, 2U, and 3U each have an excitation light source 1L, 2L, and 3L and a light-emitting panel 1P, 2P, and 3P. In this example, the three excitation light sources 1L, 2L, and 3L and the light-emitting panels 1P, 2P, and 3P are referred to as the first excitation light source 1L, the second excitation light source 2L, the third excitation light source 3L, the first light-emitting panel 1P, the second light-emitting panel 2P, and the third light-emitting panel 3P, from the left side of the vehicle (the center side of the vehicle) to the right side of the vehicle (the outside of the vehicle).

[0038] (Explanation of excitation light control members 1C, 2C, and 3C) The three excitation light control members 1C, 2C, 3C each control the excitation light L11, L12, L13 (see solid arrows in Figures 5, 7, 9, 11, and 12(B)) from the excitation light sources 1L, 2L, 3L of the three light-emitting units 1U, 2U, 3U, to prevent the excitation light L11 (L12, L13) from the excitation light source 1L (2L, 3L) of one light-emitting unit 1U (2U, 3U) of the three light-emitting units 1U, 2U, 3U from stray excitation light L31 (L32, L33) and entering the light-emitting panels 2P and 3P (1P and 3P, 1P and 2P) of the other light-emitting units 2U and 3U (1U and 3U, 1U and 2U), as shown by the solid arrows in Figures 7, 9, and 11. In this example, each of the three excitation light control members 1C, 2C, and 3C has a reflecting member 40 and a shielding member 41, as shown in FIGS.

[0039] The reflecting member 40 is a reflecting surface based on a paraboloid of revolution with the excitation light sources 1L, 2L, and 3L or their vicinity as focal points. The reflecting member 40 has a plurality of segments divided vertically and horizontally. The plurality of segments of the reflecting member 40 reflect the excitation light L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L in a predetermined direction, in this example, toward the light-emitting panels 1P, 2P, and 3P. The excitation light L11, L12, and L13 reflected by the reflecting member 40 is controlled to a predetermined light distribution DL and irradiated toward the light-emitting panels 1P, 2P, and 3P as shown in FIG.

[0040] As shown in Fig. 15, the predetermined light distribution DL has a substantially rectangular shape and has a light distribution range that includes, at the narrowest, the light-emitting film 510 serving as a light conversion film among the light-emitting panels 1P, 2P, and 3P. The predetermined light distribution DL has uniform luminous intensity (illuminance) within the light distribution range. Note that the predetermined light distribution DL may have a difference in luminous intensity (illuminance) within the light distribution range. In other words, the intensity of light within the light-emitting range may change continuously.

[0041] The shielding member 41 is made of a light-impermeable member and has a first opening 411 through which the excitation light L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L pass, and a second opening 412 through which the excitation light L11, L12, and L13 reflected by the reflecting member 40 pass. The shielding member 41 mainly blocks the excitation light L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L that travels to a side other than the reflecting member 40 side, i.e., stray excitation light L31, L32, and L33, at the edge of the first opening 411, and also blocks the excitation light L11, L12, and L13 reflected by the reflecting member 40 that travels to a side other than the light-emitting panels 1P, 2P, and 3P side, i.e., stray excitation light L31, L32, and L33, at the edge of the second opening 412.

[0042] (Explanation of excitation light sources 1L, 2L, and 3L) 6 to 11, each of the three excitation light sources 1L, 2L, and 3L in this example has a substrate 42 and a light-emitting element 43. The substrate 42 is attached to the shielding members 41 of the excitation light control members 1C, 2C, and 3C via a mounting bracket.

[0043] The light emitting element 43 is mounted on the surface of the substrate 42 facing the reflecting member 40 through the first opening 411. In this example, the light emitting element 43 is a blue LED, and a blue LED with a main wavelength of 450 nm is used. That is, the excitation light L11, L12, and L13 emitted in a Lambertian (radial) pattern from the light emitting element 43 is blue light in the range of 300 nm to 500 nm in this example. The light emitting element 43 is composed of one or more blue LEDs. Note that, as the light emitting element 43, other elements than a blue LED, such as an LD (semiconductor laser), may be used. Also, the excitation light L11, L12, and L13 may be violet light or ultraviolet light having a wavelength shorter than blue light.

[0044] The excitation light L11 emitted from the first excitation light source 1L is referred to as the first excitation light L11, the excitation light L12 emitted from the second excitation light source 2L is referred to as the second excitation light L12, and the excitation light L13 emitted from the third excitation light source 3L is referred to as the third excitation light L13.

[0045] (Explanation of excitation light filter 1F) The excitation light filter 1F does not transmit the excitation light L11, L12, and L13. That is, the excitation light filter 1F is a transparent plate that does not transmit the excitation light L11, L12, and L13 having a wavelength in the range of at least about 300 nm to about 500 nm among the excitation light L11, L12, and L13, and transmits the secondary light L21, L22, and L23 having a wavelength in the range of at least about 500 nm to about 780 nm among the secondary light L21, L22, and L23 emitted from the light-emitting panels 1P, 2P, and 3P (see the dashed arrows in Figures 5, 7, 9, 11, and 12(B)), with a transmittance of at least about 90%.

[0046] The excitation light filter 1F is made of, for example, red glass, orange glass, transparent glass coated with a blue filter layer, etc. The fact that the excitation light filter 1F does not transmit the excitation light L11, L12, and L13 means that the excitation light L11, L12, and L13 are absorbed, reflected, or blocked by the excitation light filter 1F.

[0047] 6 to 9, the excitation light filter 1F is inclined so that its upper portion is located on the lamp lens 101 side and its lower portion is located on the lamp housing 100 side. As shown in Figures 10 and 11, when viewed from above, the excitation light filter 1F has a first filter portion 11F in the left-right direction, a first connecting portion 14F in the front-rear direction, a second filter portion 12F in the left-right direction, a second connecting portion 15F in the front-rear direction, and a third filter portion 13F in the left-right direction.

[0048] The first filter portion 11F is located on the left side of the vehicle (toward the center of the vehicle) and on the rear side of the vehicle (toward the lamp lens 101). The second filter portion 12F is located between the first filter portion 11F and the third filter portion 13F. The third filter portion 13F is located on the right side of the vehicle (outside the vehicle) and on the front side of the vehicle (toward the lamp housing 100).

[0049] (Explanation of luminescent panels 1P, 2P, and 3P) The light-emitting panels 1P, 2P, and 3P are excited by excitation light L11, L12, and L13 emitted from the excitation light sources 1L, 2L, and 3L, and emit secondary light L21, L22, and L23, and emit light as shown in the diagonal lattice hatched areas in Figures 2 to 4. As shown in Figures 12(A) and 12(B), the light-emitting panels 1P, 2P, and 3P have a substrate (support substrate) 500, a light-emitting film (light-emitting layer, OPL) 510, a secondary light emission surface 520, a reflective film (reflective layer) 530, a reflective surface 540, and sealing materials 550 and 560.

[0050] The secondary light L21 emitted from the first light-emitting panel 1P is referred to as 1-2nd light L21, the secondary light L22 emitted from the second light-emitting panel 2P is referred to as 2-2nd light L22, and the secondary light L23 emitted from the third light-emitting panel 3P is referred to as 3-2nd light L23. Note that a "- " is inserted between "1st" and "2nd light L21", between "2nd" and "2nd light L22", and between "3rd" and "2nd light L23" to eliminate confusion caused by consecutive numbers, such as "12th light L21", "22nd light L22", and "32nd light L23".

[0051] As shown in Fig. 5 to Fig. 11, the three light-emitting panels 1P, 2P, and 3P are formed (produced) on one side, the other side, and one side of the excitation light filter 1F by deposition or a wet method (spin coating, spray, etc.). That is, the first light-emitting panel 1P is formed on one side of the first filter section 11F, the second light-emitting panel 2P is formed on the other side of the second filter section 12F, and the third light-emitting panel 3P is formed on one side of the third filter section 13F. The sealing material 560 of the light-emitting panels 1P, 2P, and 3P is bonded to the excitation light filter 1F. As a result, the light-emitting panels 1P, 2P, and 3P have a light-emitting film 510 as a light conversion film (light conversion layer) formed on one side and the other side of the excitation light filter 1F. 12(A) and (B), the first light-emitting panel 1P and the third light-emitting panel 3P are formed on one surface (the left surface in Figs. 12(A) and (B)) of the excitation light filter 1F, and the second light-emitting panel 2P is formed on the other surface (the right surface in Figs. 12(A) and (B)) of the excitation light filter 1F. The excitation light filter 1F is a support substrate that supports the light-emitting panels 1P, 2P, and 3P.

[0052] The substrate 500 is made of a light-transmitting resin material such as PMMA or PC, or a light-transmitting glass, which transmits the excitation light L11, L12, and L13 and the secondary light L21, L22, and L23. The substrate 500 may be flexible or rigid. The substrate 500 has a plate shape. In this example, the substrate 500 is made of glass.

[0053] The light-emitting film 510 is formed (deposited) on one surface of the substrate 500. The light-emitting film 510 uses an organic material with a dominant wavelength of 650 nm. The material of the light-emitting film 510 may be at least one of an organic fluorescent material and an organic phosphorescent material. The light-emitting film 510 is sandwiched on both sides between one or more semiconductor films (semiconductor layers). The combination of semiconductor films is arbitrary.

[0054] The light-emitting film 510 is excited by the excitation light L11, L12, and L13, and emits secondary light L21, L22, and L23 in all directions (see the circles in FIG. 12(B)). As a result, in this example, the light-emitting film 510 emits light from the entire surface, as shown in the diagonal lattice hatched areas in FIGS. 2 to 4. Here, the intensity of the secondary light L2 can be adjusted by the film thickness of the light-emitting film 510. That is, by increasing the film thickness of the light-emitting film 510, the secondary light L2 can be adjusted to be strong, and conversely, by decreasing the film thickness of the light-emitting film 510, the secondary light L2 can be adjusted to be weak.

[0055] The light-emitting film 510 has an arbitrary design, in this example, a shape as shown in the diagonal lattice hatched portion in FIGS. 2 to 4, and forms a light-emitting surface of this shape.

[0056] In this example, the secondary lights L21, L22, and L23 are red lights. The dominant wavelength of the red light is 650 nm, which is longer than 500 nm. Thus, the dominant wavelength of the secondary lights L21, L22, and L23 is longer than 500 nm and longer than the dominant wavelength of 450 nm of the excitation lights L11, L12, and L13. In this example, the secondary lights L21, L22, and L23 are red lights for tail lamps. Red light is used for stop lamps and tail stop lamps in addition to tail lamps. The secondary light L2 may be light of a color other than red light, for example, yellow-orange light. When the secondary light L2 is yellow-orange light, a turn signal lamp is used as a vehicle lamp.

[0057] The light emitting film 510 has a secondary light emitting surface 520. The secondary light emitting surface 520 is provided on a surface of the light emitting film 510 facing the substrate 500. The secondary light emitting surface 520 emits secondary light L21, L22, and L23.

[0058] As a result, the vehicle lamp 100A can obtain surface emission by the secondary light L21, L22, and L23 emitted from the secondary light emission surface 520. The total light emission area of ​​the secondary light emission surface 520 is 10 mm 2 This makes it possible to satisfy vehicle regulations regarding brightness.

[0059] The reflective film 530 is formed (deposited) on one surface of the substrate 500 so as to cover the light emitting film 510. The reflective film 530 is made of a reflective material having a reflectance of 20% or more in the wavelength region of visible light, for example, a metal material such as aluminum, silver, other metals (tungsten), or alloys of these. As a result, even if variations in reflectance occur due to manufacturing tolerances, the reflective film 530 can absorb these variations.

[0060] The reflective film 530 has a reflective surface 540. The reflective surface 540 is provided on the surface of the reflective film 530 facing the substrate 500 and the light emitting film 510. The reflective surface 540 reflects the secondary light L21, L22, and L23 emitted from the light emitting film 510 toward the light emitting film 510.

[0061] The sealing materials 550 and 560 seal the light emitting film 510 and the reflective film 530 together with the substrate 500. The sealing materials 550 and 560 are composed of a silicone resin, a SiN film, or the like 550, and an aluminum wheel 560. Note that the sealing materials 550 and 560 are not limited to this example.

[0062] (Explanation of the luminous design of the luminous film 510 of the luminous panels 1P, 2P, and 3P) The luminescent design of the luminescent film 510 of the luminescent panels 1P, 2P, and 3P can be changed arbitrarily by arbitrarily changing the design (pattern, shape, graphic, outline, etc.) of the luminescent film 510.

[0063] For example, the luminescent film 510 can form different luminescent patterns in the same shape, as shown in Figures 2 to 4 and Figures 14(A), (B), (C), and (D). Figure 14(A) is a full-surface luminescent pattern. Figure 14(B) is a basket weave pattern. Figure 14(C) is an hemp leaf pattern. Figure 14(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 14 is illustrated in grayscale, and the areas shown in dark gray are the luminescent areas.

[0064] In addition, the luminescent film 510 of the luminescent panels 1P, 2P, and 3P can form different luminescent designs (luminous shapes and luminescent patterns) within a predetermined light distribution DL, as shown in Fig. 15(A), (B), (C), and (D). Fig. 15(A) and (B) show the same shape, Fig. 15(A) shows a full-surface luminescent pattern, and Fig. 15(B) shows a luminescent pattern of a horizontally elongated rod group. Fig. 15(C) shows a horizontally elongated luminescent design of three lines on the top and bottom. Fig. 15(D) shows a horizontally elongated luminescent design of three lines on the left and right. In Fig. 15, the predetermined light distribution DL is blue with excitation lights L11, L12, and L13, and the part with diagonal lattice hatching (black part in Fig. 15(B)) is red with secondary lights L21, L22, and L23.

[0065] 14 and 15 are only examples of some of the luminescent designs of the luminescent film 510 of the luminescent panels 1P, 2P, and 3P, and the luminescent designs of the luminescent film 510 of the luminescent panels 1P, 2P, and 3P are infinite.

[0066] (Description of Function of First Embodiment) The light emitting device 1A and the vehicle lamp 100A according to the first embodiment are configured as described above, and their operation will be described below.

[0067] (Description of the non-light emitting state of light emitting panels 1P, 2P, and 3P) First, as shown in Figures 1, 5(A), 6, 8, and 10, when the light-emitting elements 43 of the excitation light sources 1L, 2L, and 3L of the light-emitting units 1U, 2U, and 3U are in an off state, the light-emitting panels 1P, 2P, and 3P are in a non-light-emitting state. Therefore, when looking into the lamp chamber 104 from the lamp lens 101, as shown in Figure 1, the light-emitting panels 1P, 2P, and 3P in a non-light-emitting state are not noticeable, and only the black color of the lamp housing 100 is visible. In Figure 1, the black color of the lamp housing 100 is shown without color.

[0068] Here, in this example, the light-emitting film 510 of the light-emitting panels 1P, 2P, and 3P of the light-emitting device 1A uses an organic material. Therefore, as shown in FIG. 13, external light (external light) L41 passes through the lamp lens 101 and enters the lamp chamber 104 as incident external light L42. Then, this incident external light L42 is reflected as reflected external light L43 by the reflecting surfaces 540 of the first light-emitting panel 1P and the third light-emitting panel 3P facing the lamp lens 101. This reflected external light L43 is reflected as re-reflected external light L44 by the reflecting members 40 of the first excitation light control member 1C and the third excitation light control member 3C. This re-reflected external light L44 is again reflected as re-reflected external light L45 by the reflecting members 40 of the first excitation light control member 1C and the third excitation light control member 3C. This re-reflected external light L45 passes through the lamp lens 101 from within the lamp chamber 104 and is emitted as emitted external light L46 to the outside of the lamp chamber 104. This emitted external light L46 enters the human eye E. This makes it appear to the human eye that there is nothing inside the lamp chamber 104. In other words, the first light-emitting panel 1P and the third light-emitting panel 3P are invisible to the human eye E.

[0069] Since the second light emitting panel 2P is formed on the other surface (the surface facing the lamp housing 100) of the excitation light filter 1F, it is invisible to the human eye E due to the excitation light filter 1F.

[0070] In addition, since the lamp lens 101 is red, it can absorb the blue light of the external light (external light) L41. This allows the blue light of the external light L41 to pass through the lamp lens 101 and excite the luminescent films 510 of the luminescent panels 1P, 2P, and 3P in the lamp chamber 104 to emit secondary light L21, L22, and L23, thereby preventing a false lighting state in which the red light is turned on.

[0071] (Explanation of the light-emitting state of the first light-emitting panel 1P) 2, 5(B), and 7, the light-emitting element 43 of the first excitation light source 1L of the first light-emitting unit 1U is turned on. Then, the light-emitting element 43 emits the first excitation light L11 (blue light). The first excitation light L11 passes through the first opening 411 of the shielding member 41 of the first excitation light control member 1C, is reflected by the reflecting member 40 of the first excitation light control member 1C, passes through the second opening 412 of the shielding member 41 of the first excitation light control member 1C, is controlled to have a predetermined light distribution DL, and enters the first light-emitting panel 1P of the first light-emitting unit 1U.

[0072] At this time, the first excitation light control member 1C irradiates the first excitation light L11 from the first excitation light source 1L to the first light-emitting panel 1P of the first light-emitting unit 1U with a predetermined light distribution DL by the reflecting member 40. At the same time, the first excitation light control member 1C blocks a part of the stray excitation light L31 of the first excitation light L11 from the first excitation light source 1L by the shielding member 41. This allows the first excitation light control member 1C to prevent a state in which the stray excitation light L31 strays into and enters the second light-emitting panel 2P of the second light-emitting unit 2U and the third light-emitting panel 3P of the third light-emitting unit 3U. In other words, it is possible to prevent a state in which the second light-emitting panel 2P and the third light-emitting panel 3P erroneously emit light.

[0073] Furthermore, the excitation light filter 1F absorbs the first excitation light L11 from the first excitation light source 1L that is not irradiated to the first light-emitting panel 1P of the first light-emitting unit 1U. This makes it possible for the excitation light filter 1F to prevent a situation in which the first excitation light L11 that is not irradiated to the first light-emitting panel 1P and not used for emission of light by the first light-emitting panel 1P is incident on the second light-emitting panel 2P of the second light-emitting unit 2U and the third light-emitting panel 3P of the third light-emitting unit 3U, causing the second light-emitting panel 2P and the third light-emitting panel 3P to erroneously emit light.

[0074] The luminescent film 510 of the first light-emitting panel 1P of the first light-emitting unit 1U emits primary-secondary light L21 (red light) in all directions due to the incidence of the first excitation light L11 controlled to a predetermined light distribution DL.

[0075] A portion of the 1-2nd light L21 passes through the light emitting film 510 and is reflected by the reflecting surface 540 toward the light emitting film 510. The reflected 1-2nd light L21 passes through the light emitting film 510 again and is emitted from the secondary light emitting surface 520 toward the lamp lens 101. The remainder of the 1-2nd light L21 is not reflected by the reflecting surface 540 and is emitted from the secondary light emitting surface 520 toward the lamp lens 101.

[0076] The first excitation light L11 that has passed through the light-emitting film 510 and reached the reflecting surface 540 is reflected by the reflecting surface 540 toward the light-emitting film 510, and excites the first-secondary light L21 in the light-emitting film 510. The first-secondary light L21 excited by the first excitation light L11 is emitted from the light-emitting film 510, and is emitted from the secondary light emission surface 520 toward the lamp lens 101.

[0077] The primary-secondary light L21 emitted from the secondary light emission surface 520 toward the lamp lens 101 transmits through the substrate 500, passes through the lamp chamber 104, and transmits through the lamp lens 101 to be irradiated to the outside of the vehicle lamp 100A in a predetermined light distribution pattern of the tail lamp. At this time, the light emitting film 510 emits light from its surface, forming a light emitting surface as shown in FIG. 2 (diagonal lattice hatching in FIG. 2).

[0078] (Explanation of the light-emitting states of the first light-emitting panel 1P and the second light-emitting panel 2P) Next, as shown in Fig. 3, Fig. 5(C), and Fig. 9, while the light-emitting element 43 of the first excitation light source 1L of the first light-emitting unit 1U is kept on, the light-emitting element 43 of the second excitation light source 2L of the second light-emitting unit 2U is turned on. Then, the light-emitting element 43 emits the second excitation light L12 (blue light). The second excitation light L12 passes through the first opening 411 of the shielding member 41 of the second excitation light control member 2C, is reflected by the reflecting member 40 of the second excitation light control member 2C, passes through the second opening 412 of the shielding member 41 of the second excitation light control member 2C, is controlled to a predetermined light distribution DL, and enters the second light-emitting panel 2P of the second light-emitting unit 2U.

[0079] At this time, the second excitation light control member 2C, like the action of the first excitation light control member 1C, irradiates the second excitation light L12 from the second excitation light source 2L to the second light-emitting panel 2P of the second light-emitting unit 2U with a predetermined light distribution DL by the reflecting member 40. At the same time, the second excitation light control member 2C blocks a part of the stray excitation light L32 of the second excitation light L12 from the second excitation light source 2L by the shielding member 41. This allows the second excitation light control member 2C to prevent a state in which the stray excitation light L32 strays and enters the first light-emitting panel 1P of the first light-emitting unit 1U and the third light-emitting panel 3P of the third light-emitting unit 3U. In other words, it is possible to prevent a state in which the first light-emitting panel 1P and the third light-emitting panel 3P erroneously emit light. In this example, since the first light-emitting panel 1P is in an emitting state, there is no problem with the first light-emitting panel 1P, but it is effective for the third light-emitting panel 3P, or when only the second light-emitting panel 2P is illuminated.

[0080] Furthermore, the excitation light filter 1F absorbs the second excitation light L12 from the second excitation light source 2L that is not irradiated to the second light-emitting panel 2P of the second light-emitting unit 2U. This prevents the second excitation light L12 that is not irradiated to the second light-emitting panel 2P and is not used for the emission of light from the second light-emitting panel 2P from entering the first light-emitting panel 1P of the first light-emitting unit 1U and the third light-emitting panel 3P of the third light-emitting unit 3U, causing the first light-emitting panel 1P and the third light-emitting panel 3P to emit light erroneously. In this example, since the first light-emitting panel 1P is in an emitting state, there is no problem with the first light-emitting panel 1P, but this is effective for the third light-emitting panel 3P and when only the second light-emitting panel 2P is to be emitted.

[0081] The light-emitting film 510 of the second light-emitting panel 2P of the second light-emitting unit 2U emits 2-2nd order light L22 (red light) in all directions due to the incidence of the second excitation light L12 controlled to a predetermined light distribution DL. This 2-2nd order light L22 is emitted to the lamp housing 100 side in the opposite direction to the emission direction of the 1-2nd order light L21, and is reflected by the reflector 103 to the lamp lens 101 side.

[0082] As a result, the 2-secondary light L22 is transmitted through the lamp lens 101 and is irradiated to the outside of the vehicle lamp 100A in a predetermined light distribution pattern of the tail lamp. At this time, the light emitting film 510 emits light from its surface, forming a light emitting surface as shown in FIG. 3 (diagonal lattice hatching in FIG. 3).

[0083] (Explanation of the light emission state of light emitting panels 1P, 2P, and 3P) Then, as shown in Fig. 4, Fig. 5(D) and Fig. 11, the light emitting element 43 of the third excitation light source 3L of the third light emitting unit 3U is turned on while the light emitting element 43 of the first excitation light source 1L of the first light emitting unit 1U and the light emitting element 43 of the second excitation light source 2L of the second light emitting unit 2U are kept turned on. Then, the third excitation light L13 (blue light) is emitted from the light emitting element 43. The third excitation light L13 passes through a first opening (not shown) of the shielding member 41 of the third excitation light control member 3C, is reflected by the reflecting member 40 of the second excitation light control member 2C, passes through a second opening (not shown) of the shielding member 41 of the third excitation light control member 3C, is controlled to a predetermined light distribution DL and enters the third light emitting panel 3P of the third light emitting unit 3U.

[0084] At this time, the third excitation light control member 3C, like the actions of the first excitation light control member 1C and the second excitation light control member 2C, irradiates the third excitation light L13 from the third excitation light source 3L to the third light-emitting panel 3P of the third light-emitting unit 3U with a predetermined light distribution DL by the reflecting member 40. At the same time, the third excitation light control member 3C blocks a part of the stray excitation light L33 of the third excitation light L13 from the third excitation light source 3L by the shielding member 41. This makes it possible for the third excitation light control member 3C to prevent a state in which the stray excitation light L33 strays and enters the first light-emitting panel 1P of the first light-emitting unit 1U and the second light-emitting panel 2P of the second light-emitting unit 2U. In other words, it is possible to prevent a state in which the first light-emitting panel 1P and the second light-emitting panel 2P are erroneously emitted. In this example, since the first light-emitting panel 1P and the second light-emitting panel 2P are in an emitting state, there is no particular problem, but it is effective in the case where only the third light-emitting panel 3P is caused to emit light.

[0085] Furthermore, the excitation light filter 1F absorbs the third excitation light L13 from the third excitation light source 3L that is not irradiated to the third light-emitting panel 3P of the third light-emitting unit 3U. This prevents the third excitation light L13 that is not irradiated to the third light-emitting panel 3P and is not used for the emission of the third light-emitting panel 3P from entering the first light-emitting panel 1P of the first light-emitting unit 1U and the second light-emitting panel 2P of the second light-emitting unit 2U, causing the first light-emitting panel 1P and the second light-emitting panel 2P to emit light erroneously. In this example, since the first light-emitting panel 1P and the second light-emitting panel 2P are in an emitting state, there is no particular problem, but this is effective when only the third light-emitting panel 3P is to be emitted.

[0086] The luminescent film 510 of the third light-emitting panel 3P of the third light-emitting unit 3U emits tertiary-secondary light L23 (red light) in all directions due to the incidence of the third excitation light L13 controlled to a predetermined light distribution DL. This tertiary-secondary light L23 is emitted toward the lamp lens 101.

[0087] As a result, the tertiary-secondary light L23 passes through the lamp lens 101 and is irradiated to the outside of the vehicle lamp 100A in a predetermined light distribution pattern of the tail lamp. At this time, the light-emitting film 510 emits light from its surface, forming a light-emitting surface as shown in FIG. 4 (hatched with a diagonal grid in FIG. 4).

[0088] 2 to 4, in the vehicle lamp 100A, the light emitting surface of the light emitting film 510 (diagonal lattice hatching in Figs. 2 to 4) can be seen through the lamp lens 101 in the central upper and lower parts of the lamp chamber 104. Note that in the upper and lower parts of the lamp chamber 104, the black color (or a color other than black) of the inner panel 102 is visible.

[0089] (Explanation of sequential lighting) In addition, the vehicle lamp 100A can obtain sequential illumination from the non-light-emitting state of the light-emitting panels 1P, 2P, and 3P in FIG. 1, through the light-emitting state of the first light-emitting panel 1P in FIG. 2, through the light-emitting state of the first light-emitting panel 1P and the second light-emitting panel 2P in FIG. 3, through the light-emitting state of the light-emitting panels 1P, 2P, and 3P in FIG. 4, to the non-light-emitting state of the light-emitting panels 1P, 2P, and 3P in FIG. 1.

[0090] (Explanation of segment lighting) Furthermore, as shown in FIG. 16, the vehicular lamp 100A has one first light-emitting panel 1P in an emitting state (the state shown in FIG. 16(A)), one second light-emitting panel 2P in an emitting state (the state shown in FIG. 16(B)), one third light-emitting panel 3P in an emitting state (the state shown in FIG. 16(C)), two first light-emitting panels 1P and a second light-emitting panel 2P in an emitting state (the state shown in FIG. 16(D)), and two first light-emitting panels 1P and Segment light can be obtained by setting the third light-emitting panel 3P to an emitting state (the state shown in FIG. 16(E)), the two second light-emitting panels 2P and the third light-emitting panel 3P to an emitting state (the state shown in FIG. 16(F)), the three first light-emitting panels 1P, the second light-emitting panel 2P and the third light-emitting panel 3P to an emitting state (the state shown in FIG. 16(G)), and the three light-emitting panels 1P, 2P, 3P to a non-emitting state (the state shown in FIG. 16(H)).

[0091] (Explanation of Effects of the First Embodiment) The light emitting device 1A and the vehicle lamp 100A according to the first embodiment have the above-mentioned configuration and function, and the effects thereof will be described below.

[0092] The light-emitting device 1A and vehicle lamp 100A of this embodiment 1 have three light-emitting units 1U, 2U, 3U, which have excitation light sources 1L, 2L, 3L that emit excitation light L11, L12, L13, respectively, and light-emitting panels 1P, 2P, 3P that are excited by the excitation light L11, L12, L13 and emit secondary light L21, L22, L23 to emit light, the first light-emitting unit 1U is arranged on one side of the excitation light filter 1F and toward the center of the vehicle, the second light-emitting unit 2U is arranged on the other side of the excitation light filter 1F, and the third light-emitting unit 3U is arranged on one side of the excitation light filter 1F and outside the vehicle, and the excitation light filter 1F does not transmit the excitation light L11, L12, L13.

[0093] As a result, when the first excitation light source 1L is turned on, the light emitting device 1A and the vehicular lamp 100A according to the first embodiment absorb, by the excitation light filter 1F, the first excitation light L11 from the first excitation light source 1L that is not irradiated to the first light emitting panel 1P of the first light emitting unit 1U. As a result, the light emitting device 1A and the vehicular lamp 100A according to the first embodiment can prevent, by the excitation light filter 1F, a state in which the first excitation light L11 that is not irradiated to the first light emitting panel 1P and is not used for light emission by the first light emitting panel 1P is incident on the second light emitting panel 2P of the second light emitting unit 2U and the third light emitting panel 3P of the third light emitting unit 3U, causing the second light emitting panel 2P and the third light emitting panel 3P to erroneously emit light.

[0094] Furthermore, in the light emitting device 1A and the vehicle lamp 100A according to the first embodiment, when the second excitation light source 2L or the third excitation light source 3L is turned on, the excitation light filter 1F similarly absorbs the second excitation light L12 from the second excitation light source 2L that is not irradiated onto the second light emitting panel 2P of the second light emitting unit 2U, or the third excitation light L13 from the third excitation light source 3L that is not irradiated onto the third light emitting panel 3P of the third light emitting unit 3U. As a result, the light emitting device 1A and vehicle lamp 100A of this embodiment 1 can prevent a state in which the second excitation light L12, which is not irradiated to the second light-emitting panel 2P and not used to emit light from the second light-emitting panel 2P, is incident on the first light-emitting panel 1P of the first light-emitting unit 1U and the third light-emitting panel 3P of the third light-emitting unit 3U, causing the first light-emitting panel 1P and the third light-emitting panel 3P to erroneously emit light, or a state in which the third excitation light L13, which is not irradiated to the third light-emitting panel 3P and not used to emit light from the third light-emitting panel 3P, is incident on the first light-emitting panel 1P of the first light-emitting unit 1U and the second light-emitting panel 2P of the second light-emitting unit 2U, causing the first light-emitting panel 1P and the second light-emitting panel 2P to erroneously emit light.

[0095] As a result, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can achieve sequential light emission and segment light emission as described above, and can also achieve multiple light emitting functions, in this example, three light emitting functions, such as a tail lamp function and a stop lamp function, lamp functions with different patterns, and lamp functions with different light emitting surfaces and brightness of irradiated light, etc. In other words, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can achieve multiple light emitting functions.

[0096] In the light-emitting device 1A and vehicle lamp 100A according to the first embodiment, the light-emitting panels 1P, 2P, and 3P of the three light-emitting units 1U, 2U, and 3U are each formed on one or the other side of an excitation light filter 1F, and have a light-emitting film 510 as a light conversion film that is excited by excitation light L11, L12, and L13 and emits secondary light L21, L22, and L23, and this light-emitting film 510 is formed into an arbitrary shape.

[0097] As a result, the light emitting device 1A, the vehicle lamp 100A according to the first embodiment can further obtain various sequential lighting, segment lighting, and three lighting functions in addition to the sequential lighting, segment lighting, and three lighting functions described above. If the light emitting film 510 is formed into a character such as "STOP" or "Stopping", communication lighting can be obtained in a tail lamp or a stop lamp.

[0098] The light-emitting device 1A and vehicle lamp 100A of this embodiment 1 are equipped with excitation light control members 1C, 2C, 3C that control the excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L of the three light-emitting units 1U, 2U, 3U, respectively, and prevent the excitation light L11 (L12, L13) from the excitation light source 1L (2L, 3L) of one light-emitting unit 1U (2U, 3U) from stray excitation light L31 (L32, L33) from entering the light-emitting panels 2P and 3P (1P and 3P, 1P and 2P) of the other light-emitting units 2U and 3U (1U and 3U, 1U and 2U).

[0099] As a result, the light emitting device 1A and vehicle lamp 100A of this embodiment 1 can prevent stray excitation light L31 (L32, L33) from one light emitting unit 1U (2U, 3U) from strayly entering the light emitting panels 2P and 3P (1P and 3P, 1P and 2P) of other light emitting units 2U and 3U (1U and 3U, 1U and 2U) by using the excitation light control members 1C, 2C, and 3C, thereby obtaining multiple light emitting functions controlled with high precision.

[0100] In the light-emitting device 1A and vehicle lamp 100A according to this embodiment 1, the excitation light control members 1C, 2C, 3C have a reflecting member 40 that irradiates excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L to the light-emitting panels 1P, 2P, 3P of the light-emitting units 1U, 2U, 3U with a predetermined light distribution DL, and a shielding member 41 that shields stray excitation light L31, L32, L33 that is a part of the excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L.

[0101] As a result, the light emitting device 1A and vehicle lamp 100A of this embodiment 1 can irradiate the excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L to the light emitting panels 1P, 2P, 3P of the light emitting units 1U, 2U, 3U with a predetermined light distribution DL by the reflective member 40, and at the same time, can block stray excitation light L31, L32, L33 that is a part of the excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L by the shielding member 41.

[0102] As a result, the light-emitting device 1A and vehicle lamp 100A of this embodiment 1 can prevent stray excitation light L31 (L32, L33) from one light-emitting unit 1U (2U, 3U) from strayly entering the light-emitting panels 2P and 3P (1P and 3P, 1P and 2P) of other light-emitting units 2U and 3U (1U and 3U, 1U and 2U), thereby achieving multiple light-emitting functions controlled with high precision.

[0103] The excitation light filter 1F of the light emitting device 1A and vehicle lamp 100A according to this embodiment 1 is a transparent plate that does not transmit the excitation light L11, L12, L13 having a wavelength in the range of at least about 300 nm to about 500 nm among the excitation light L11, L12, L13, but transmits the secondary light L21, L22, L23 emitted from the light emitting panels 1P, 2P, 3P having a wavelength in the range of at least about 500 nm to about 780 nm with a transmittance of at least about 90%.

[0104] As a result, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can use blue light as the excitation light L11, L12, and L13 by the excitation light filter 1F, and can obtain red light or yellow-orange light as the secondary light L21, L22, and L23. Moreover, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can minimize the loss of the red light or yellow-orange secondary light L21, L22, and L23 by the excitation light filter 1F, and can therefore use the red light or yellow-orange secondary light L21, L22, and L23 with high efficiency.

[0105] The excitation light filter 1F of the light emitting device 1A and the vehicle lamp 100A according to the first embodiment has three stages in the left-right direction, a first filter section 11F, a second filter section 12F, and a third filter section 13F, and two stages in the front-rear direction, a first connecting section 14F, and a second connecting section 15F. This makes it possible for the light emitting device 1A and the excitation light filter 1F of the vehicle lamp 100A according to the first embodiment to prevent stray excitation light L31 (L32, L33) of one light emitting unit 1U (2U, 3U) from straying into and being incident on the light emitting panels 2P and 3P (1P and 3P, 1P and 2P) of other light emitting units 2U and 3U (1U and 3U, 1U and 2U).

[0106] In the vehicle lamp 100A of this embodiment 1, a reflector 103 is arranged within a lamp chamber 104 between the lamp housing 100 and the second light-emitting panel 2P of the second light-emitting unit 2U of the light-emitting device 1A and the second filter portion 12F of the excitation light filter 1F, and this reflector 103 reflects the 2-2nd order light L22 from the second light-emitting unit 2U to the outside of the lamp chamber 104, i.e., from within the lamp chamber 104, through the lamp lens 101 and to the outside of the lamp chamber 104.

[0107] As a result, in the vehicle lamp 100A of this embodiment 1, the reflector 103 reflects the 2-2nd order light L22 emitted toward the lamp housing 100 toward the lamp lens 101, and the light passes through the lamp lens 101 to be irradiated to the outside from within the lamp chamber 104, thereby making effective use of the 2-2nd order light L22.

[0108] The vehicle lamp 100A in this embodiment 1 has, as a lamp chamber forming member, a lamp lens 101 as an outer lens that does not transmit excitation light L11, L12, and L13 from the light emitting device 1A but transmits secondary light L21, L22, and L23 from the light emitting device 1A.

[0109] As a result, in the vehicle lamp 100A of this embodiment 1, the lamp lens 101 does not transmit the excitation light L11, L12, and L13, but transmits the secondary light L21, L22, and L23, so that there is no variation in chromaticity in the lamp lens 101 and the regulations for vehicle lamps can be met.

[0110] In the vehicle lamp 100A of this embodiment 1, a lamp lens 101 as an outer lens that does not transmit excitation light L11, L12, and L13 from the light emitting device 1A but transmits secondary light L21, L22, and L23 from the light emitting device 1A is red or yellow-orange, the excitation light L11, L12, and L13 are blue light, and the secondary light L21, L22, and L23 are red light or yellow-orange light.

[0111] As a result, in the vehicle lamp 100A of this embodiment 1, the lamp lens 101 is red or yellow-orange, so that the excitation light L11, L12, L13, which is blue light, is not transmitted, and the secondary light L21, L22, L23, which is red light or yellow-orange light, is transmitted. Therefore, there is no variation in chromaticity in the lamp lens 101, and the regulations for vehicle lamps (stop lamps, tail lamps, turn signal lamps) can be met.

[0112] (Description of the configuration, operation, and effect of the second embodiment) 17 to 20 show a light emitting device for a vehicle lamp and a vehicle lamp according to a second embodiment of the present invention. The configurations, functions, and effects of a light emitting device 1B for a vehicle lamp and a vehicle lamp 100B according to the second embodiment will be described below. In the drawings, the same reference numerals as those in Figs. 1 to 16 indicate the same parts.

[0113] The light emitting device 1A and the vehicle lamp 100A of the first embodiment use light emitting panels 1P, 2P, and 3P made of organic light emitting material. On the other hand, the light emitting device 1B and the vehicle lamp 100B of the second embodiment use light emitting panels 10P, 20P, and 30P made of inorganic light emitting material.

[0114] The luminescent film (luminescent layer) of the luminescent panels 10P, 20P, and 30P made of inorganic luminescent material is obtained by heat-treating a light-transmitting binder material 570 containing inorganic phosphor particles 580 at 150°C or 500°C, as shown in Fig. 19. As the binder material 570, for example, transparent resin silicone or transparent SiO2 is used. As the inorganic phosphor particles 580, for example, powdered red phosphor CASN:Eu is used.

[0115] The inorganic light-emitting panels 10P, 20P, and 30P are formed by applying a binder material 570 for a light-emitting film (light-emitting layer) and inorganic phosphor particles 580 to a substrate 500 by squeegeeing through a design mask, or by using a doctor blade.

[0116] The luminescent films (binder material 570 and inorganic phosphor granules 580) of the luminescent panels 10P, 20P, and 30P of the light emitting device 1B of the second embodiment use inorganic luminescent materials. Therefore, as shown in FIG. 20, external light (external light) L41 passes through the lamp lens 101 and enters the lamp chamber 104 as incident external light L42. Then, this incident external light L42 is diffusely reflected as diffusely reflected light L47 by the inorganic phosphor granules 580 of the luminescent films of the first luminescent panel 10P and the third luminescent panel 30P facing the lamp lens 101. This diffusely reflected light L47 passes through the lamp lens 101 from inside the lamp chamber 104 and is emitted to the outside of the lamp chamber 104 as emitted external light L48. This emitted external light L48 enters the human eye E. 17 and 18, a person can see the first light-emitting panel 10P and the third light-emitting panel 30P within the lamp chamber 104. The second light-emitting panel 20P can also be seen through the excitation light filter 1F.

[0117] The light emitting device 1B of the vehicular lamp and the vehicular lamp 100B according to the second embodiment can achieve the same effects as the light emitting device 1A of the vehicular lamp and the vehicular lamp 100A according to the first embodiment.

[0118] (Description of Modification 1 of Excitation Light Control Member) FIG. 21 is a vertical cross-sectional view showing Modification 1 of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B and the vehicle lamp 100A, 100B according to the present invention.

[0119] The excitation light control member 1C (2C, 3C) has a reflecting member 40 and a shielding member 41. In contrast, the excitation light control member 1C (2C, 3C) of this modification 1 has a lens member 45 having an incident surface 450 and an exit surface 451, and a shielding member 410 having an opening 413. The lens member 45 allows the excitation light L11 (L12, L13) to be incident from the incident surface 450 and to be emitted from the exit surface 451, and refracts the excitation light L11 (L12, L13) at a predetermined angle at at least one surface (in this example, the incident surface 450) of the incident surface 450 and the exit surface 451. Opening 413 of shielding member 410 irradiates excitation light L11 (L12, L13) emitted from emission surface 451 of lens member 45 to light-emitting panels 1P, 10P (2P, 20P, 3P, 30P) with a predetermined light distribution DL.

[0120] The excitation light control member 1C (2C, 3C) of this modified example 1 can achieve the same effects as the excitation light control member 1C (2C, 3C) described above.

[0121] (Description of Modification Example 2 of Excitation Light Control Member) FIG. 22 is a vertical cross-sectional view showing Modification 2 of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B and the vehicle lamp 100A, 100B according to the present invention.

[0122] The excitation light control member 1C (2C, 3C) has a reflecting member 40 and a shielding member 41, and the excitation light control member 1C (2C, 3C) of the modified example 1 has a lens member 45 and a shielding member 410. In contrast, the excitation light control member 1C (2C, 3C) of the modified example 2 has a reflecting member 40, a shielding member 410, and a lens member 45. The reflecting member 40 reflects the excitation light L11 (L12, L13) toward the incident surface 450 side of the lens member 45.

[0123] The excitation light control member 1C (2C, 3C) of the second modification can achieve the same effects as the excitation light control member 1C (2C, 3C) and the excitation light control member 1C (2C, 3C) of the first modification.

[0124] (Description of Modification 3 of Excitation Light Control Member) FIG. 23 is a vertical cross-sectional view showing a third modified example of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B and the vehicle lamp 100A, 100B according to the present invention.

[0125] The excitation light control member 1C (2C, 3C) has a reflecting member 40 and a shielding member 41, the excitation light control member 1C (2C, 3C) of the first modification has a lens member 45 and a shielding member 410, and the excitation light control member 1C (2C, 3C) of the second modification has a reflecting member 40, a shielding member 410, and a lens member 45. In contrast, the excitation light control member 1C (2C, 3C) of the third modification has a light guide member 46 having an incident surface 460 and an exit surface 461, and a shielding member 410. The light guide member 46 causes the excitation light L11 (L12, L13) to enter from the incident surface 460, guides the light to the exit surface 461, and emits the light from the exit surface 461 to an opening 413 of the shielding member 410. Opening 413 of shielding member 410 irradiates excitation light L11 (L12, L13) emitted from emission surface 461 of light-guiding member 46 to light-emitting panels 1P, 10P (2P, 20P, 3P, 30P) with a predetermined light distribution DL.

[0126] The excitation light control member 1C (2C, 3C) of this modified example 3 can achieve the same effects as the excitation light control member 1C (2C, 3C), the excitation light control member 1C (2C, 3C) of modified example 1, and the excitation light control member 1C (2C, 3C) of modified example 2.

[0127] (Explanation of examples other than the first and second embodiments and the first, second, and third modifications) In the above-mentioned first and second embodiments and first, second and third modifications, an example is described in which the vehicular lamps 100A and 100B are tail lamps constituting a rear combination lamp, and the secondary light L2 is red light. However, in the present invention, the vehicular lamps 100A and 100B 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, and in the case of a turn signal lamp, the secondary light L2 is yellow-orange light.

[0128] In the above-described first and second embodiments and first, second and third modifications, the excitation light control members 1C, 2C and 3C include those having a reflecting member 40 and a shielding member 41, those having a lens member 45 and a shielding member 410, those having a reflecting member 40, a shielding member 410 and a lens member 45, and those having a light-guiding member 46 and a shielding member 410. However, in the present invention, the reflecting member 40, the shielding members 41 and 410, the lens member 45 and the light-guiding member 46 may be combined in any manner or may be used alone.

[0129] Furthermore, in the above-mentioned embodiments 1 and 2 and modified examples 1, 2 and 3, three light-emitting panels 1P, 2P and 3P of three light-emitting units 1U, 2U and 3U are used. However, in the present invention, two, four or more light-emitting panels of a light-emitting unit may be used. Moreover, by using a large number of panels, detailed and diverse sequential lighting, segment lighting, communication lighting and the like can be obtained.

[0130] Furthermore, in the above-mentioned first and second embodiments and the first, second and third modifications, a reflector 103 is disposed in the lamp chamber 104 between the lamp housing 100 and the second light-emitting panel 2P of the second light-emitting unit 2U of the light-emitting device 1A and the second filter portion 12F of the excitation light filter 1F, and the reflector 103 reflects the 2-2nd order light L22 from the second light-emitting unit 2U to the outside of the lamp chamber 104, that is, from inside the lamp chamber 104 through the lamp lens 101 to the outside of the lamp chamber 104. However, in this invention, a reflector that reflects the secondary light L21, L22, and L23 from the light-emitting devices 1A and 1B to the light-emitting panels 1P, 2P, 3P, 10P, 20P, and 30P of the light-emitting devices 1A and 1B may be disposed in the lamp chamber 104. In addition, both this reflector and the reflector 103 may be disposed.

[0131] It should be noted that the present invention is not limited to the above-described first to fifth embodiments. [Explanation of symbols]

[0132] 1A, 1B Light emitting device 1U, 2U, 3U Light Emitting Unit 1U First Light Emitting Unit 2U Second Light Emitting Unit 3U 3rd light emitting unit 1F Excitation light filter 11F 1st filter section 12F Second filter section 13F 3rd filter section 14F 1st junction 15F 2nd connection 1C, 2C, 3C Excitation light control components 1C First excitation light control member 2C Second excitation light control member 3C Third excitation light control member 40 Reflective material 41, 410 Shielding member 411 First Opening 412 Second Opening 413 Opening 1L, 2L, 3L excitation light source 1L First excitation light source 2L 2nd excitation light source 3L Third excitation light source 42 Substrate 43 Light emitting element 45 Lens parts 450 Entrance plane 451 Exit surface 46 Light guide member 460 Incidence plane 461 Exit surface 1P, 2P, 3P, 10P, 20P, 30P Light-emitting panel 1P, 10P First light-emitting panel 2P, 20P Second light-emitting panel 3P, 30P 3rd light-emitting panel 500 boards 510 Light-emitting film (light-emitting layer, OPL) 520 Secondary light exit surface 530 Reflective film (reflective layer) 540 Reflective surface 550 Encapsulating material 560 Encapsulating material 570 Binder material 580 Inorganic phosphor granules 100A, 100B Vehicle lighting fixtures 100 Lamp housing 101 Lamp lens (outer lens) 102 Inner Panel 103 Reflector 104 Light room 105 Bracket After B D bottom DL Light Distribution E eyes Before F L left L11, L12, L13 excitation light L11 First excitation light L12 Second excitation light L13 3rd excitation light L21, L22, L23 secondary light L21 1st and 2nd light L22 2nd-secondary light L23 3rd-2nd light L31, L32, L33 Stray excitation light L41, L42, L43, L44, L45, L46, L47, L48 External light R right U Top Z reference axis

Claims

1. A light emitting device for a vehicle lamp, comprising a plurality of light emitting units and an excitation light filter, Each of the plurality of light-emitting units has an excitation light source that emits excitation light, and a light-emitting panel that is excited by the excitation light and emits secondary light to emit light, At least one of the light-emitting units is disposed on each of one side and the other side of the excitation light filter, The excitation light filter does not transmit the excitation light. A light emitting device for a vehicle lamp.

2. Each of the light-emitting panels of the plurality of light-emitting units has a light-emitting film as a light conversion film formed on one surface or the other surface of the excitation light filter, and is excited by the excitation light to emit the secondary light and emit light; The light-emitting film is formed in any shape.

2. The light emitting device for a vehicle lamp according to claim 1.

3. and an excitation light control member that controls the excitation light from the excitation light source of each of the plurality of light-emitting units to prevent the excitation light from the excitation light source of one of the light-emitting units from straying and entering the light-emitting panel of another of the light-emitting units as stray excitation light.

2. The light emitting device for a vehicle lamp according to claim 1.

4. The excitation light control member is A reflecting member that reflects the excitation light in a predetermined direction; a lens member that refracts the excitation light at a predetermined angle at at least one of an incident surface and an exit surface; a light guiding member that guides the excitation light incident from an incident surface to an exit surface and emits the excitation light to the outside from the exit surface; a shielding member for shielding the stray excitation light; having at least one member selected from the group consisting of 4. The light emitting device for a vehicle lamp according to claim 3.

5. The excitation light filter is a transparent plate that does not transmit the excitation light having a wavelength in the range of at least about 300 nm to about 500 nm, and transmits the secondary light having a wavelength in the range of at least about 500 nm to about 780 nm, among the secondary light emitted by the light-emitting panel, with a transmittance of at least about 90%.

2. The light emitting device for a vehicle lamp according to claim 1.

6. A lamp chamber forming member that forms a lamp chamber; The light emitting device of the vehicle lamp according to any one of claims 1 to 5, which is disposed in the lamp chamber; Equipped with A vehicle lamp characterized by the above.

7. and at least one of a reflector disposed in the lamp chamber, which reflects the secondary light from the light-emitting device to the outside of the lamp chamber, and a reflector which reflects the excitation light from the light-emitting device to a light-emitting panel side of the light-emitting device.

7. A vehicle lamp according to claim 6.

8. The lamp chamber forming member has an outer lens that does not transmit excitation light from the light emitting device and transmits secondary light from the light emitting device.

7. A vehicle lamp according to claim 6.

9. the lamp chamber forming member has an outer lens that does not transmit excitation light from the light emitting device and transmits secondary light from the light emitting device, The outer lens is red or yellow-orange, the excitation light is blue light, The secondary light is red light or yellow-orange light.

9. A vehicle lamp according to claim 8.

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