JP2023163825A - Light emitting device of vehicle lamp and vehicle lamp - Google Patents

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

The present invention relates to a light emitting device for a vehicle lamp. The present invention relates to a vehicle lamp.

2. Description of the Related Art A light-emitting device for a vehicle lamp and a vehicle lamp that utilize secondary light excited by excitation light to emit light include those shown in Patent Document 1, for example.

The light source unit of the vehicle lamp disclosed in Patent Document 1 includes a light source section and a light generation section having a light emitting layer. The vehicle lamp disclosed in Patent Document 1 includes the light source unit described above, and a lamp housing and a lamp lens that accommodate the light source unit.

Hereinafter, the light source unit of the vehicle lamp of Patent Document 1 and the operation of the vehicle lamp will be described. The excitation light emitted from the light source section excites the light emitting layer of the light generation section to emit secondary light, and emits light in a predetermined light emission pattern. Further, the secondary light is transmitted through a lamp lens and irradiated to the outside as a light distribution pattern of, for example, a tail lamp.

International Publication 2019/245030

However, since the light source unit of the vehicle lamp and the vehicle lamp of Patent Document 1 include one light source section and one light generation section, the light emission pattern of the light generation section is one. Limited. As a result, the light source unit of the vehicular lamp and the vehicular lamp of Patent Document 1 cannot provide a plurality of light emitting functions.

The problem to be solved by the present invention is to provide a light emitting device for a vehicle lamp and a vehicle lamp that can provide a plurality of light emitting functions.

A light emitting device for a vehicle lamp according to the present invention is a light emitting device for a vehicle lamp, and includes a plurality of light emitting units and an excitation light filter, and each of the plurality of light emitting units emits excitation light. It has an excitation light source and a light emitting panel that is excited by the excitation light and emits secondary light to emit light, and a plurality of light emitting units are provided on one side and the other side of the excitation light filter, respectively. The excitation light filter is arranged one by one, and is characterized in that the excitation light filter does not transmit the excitation light.

In the light emitting device for a vehicle lamp according to the present invention, the light emitting panels of the plurality of light emitting units are each formed on one side or the other side of the excitation light filter, and are excited by the excitation light to emit secondary light. It is preferable that the light-emitting film has a light-emitting film as a light conversion film that emits light, and the light-emitting film is formed in an arbitrary shape.

In the light emitting device for a vehicle lamp according to the present invention, the excitation light from the excitation light sources of the plurality of light emitting units is controlled respectively, so that the excitation light from the excitation light source of one light emitting unit is used as stray excitation light and It is preferable to include an excitation light control member that prevents the excitation light from entering the light emitting panel of the light emitting unit.

In the light emitting device for a vehicle lamp according to the present invention, the excitation light control member includes a reflection member that reflects the excitation light in a predetermined direction, and a reflection member that refracts the excitation light at a predetermined angle on at least one of an input surface and an output surface. At least one member selected from among a lens member, a light guide member that guides the excitation light incident from the incident surface to the output surface and outputs the excitation light to the outside from the output surface, and a shielding member that blocks stray excitation light. is preferred.

In the light emitting device for a vehicle lamp according to the present invention, the excitation light filter does not transmit excitation light having a wavelength in the range of at least about 300 nm to about 500 nm, and among the secondary light emitted by the light emitting panel. It is preferable that the transparent plate transmits secondary light having a wavelength in the range of at least about 500 nm to about 780 nm with a transmittance of about 90% or more.

The vehicular lamp of the present invention is characterized by comprising a light chamber forming member forming a light chamber, and a light emitting device of the vehicular lamp of the present invention disposed within the lamp chamber.

In the vehicle lamp of the present invention, the reflector is disposed inside the light chamber and reflects secondary light from the light emitting device to the outside of the light chamber, or reflects excitation light from the light emitting device toward the light emitting panel side of the light emitting device. It is preferable to include at least one of the following: a reflector.

In the vehicle lamp of the present invention, it is preferable that the light 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.

In the vehicle lamp of the present invention, the light 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 the outer lens has a red or yellow color. Preferably, the color is orange, the excitation light is blue light, and the secondary light is red light or yellow-orange light.

The light emitting device for a vehicular lamp and the vehicular lamp of the present invention can provide a plurality of light emitting functions.

FIG. 1 is a front view of a light emitting device for a vehicle light according to the present invention, and a front view of the vehicle light when the vehicle light is not lit (extinguished, hereinafter the same), showing a first embodiment of the vehicle light. FIG. 2 is a front view of the vehicle lamp showing a state in which the first light emitting panel of the first light emitting unit is emitting light. 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 emit light at the same time. FIG. 4 is a front view of the vehicle lamp 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 emit light at the same time. It is. FIG. 5 is a cross-sectional explanatory diagram showing a light emitting device of a vehicle lamp. (A) is an explanatory cross-sectional view taken along the line AA in FIG. 1. (B) is an explanatory cross-sectional view taken along the line BB in FIG. 2. (C) is an explanatory cross-sectional view taken along the line CC in FIG. 3. (D) is an explanatory cross-sectional view taken along the line DD in FIG. 4. FIG. 6 is an explanatory longitudinal cross-sectional view (explanatory cross-sectional view along the line VI-VI in FIG. 1) showing the light emitting device of the vehicle lamp and the state of the vehicle lamp when it is not lit. FIG. 7 is an explanatory longitudinal cross-sectional view (explanatory cross-sectional view taken along the line VII-VII in FIG. 2) showing a state in which the first light-emitting panel of the first light-emitting unit emits light. FIG. 8 is an explanatory longitudinal cross-sectional view (explanatory cross-sectional view along the line VIII-VIII in FIG. 1) showing the light emitting device of the vehicle lamp and the state of the vehicle lamp when the vehicle lamp is not lit. FIG. 9 is a vertical cross-sectional explanatory diagram (cross-sectional explanatory diagram taken along the 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 emit light at the same time. . FIG. 10 is a cross-sectional explanatory diagram showing a light emitting device of a vehicle lamp and a state of the vehicle lamp when not lit (a cross-sectional explanatory diagram taken along the line A-A in FIG. 1, which corresponds to FIG. 5(A)). (surface explanatory diagram). FIG. 11 is a vertical cross-sectional explanatory diagram (see FIG. FIG. 4 is an explanatory cross-sectional view taken along line DD in FIG. 4, and is an explanatory cross-sectional view corresponding to FIG. 5(D). FIG. 12(A) is a partially enlarged schematic vertical cross-sectional view showing the light emitting panel. 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. FIG. 13 is a vertical cross-sectional explanatory diagram (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. be. FIG. 14 is an explanatory diagram showing a light emitting design of a light emitting film of a light emitting panel. FIG. 15 is an explanatory diagram showing a light emitting design of a light emitting film of a light emitting panel arranged within a predetermined light distribution. 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. FIG. 17 is a front view of a vehicle lamp when not lit, showing Embodiment 2 of a light emitting device for a vehicle lamp and a vehicle lamp according to the present invention. FIG. 18 is a front view of the vehicle lamp showing a state in which the first light emitting panel of the first light emitting unit is emitting light. FIG. 19(A) is a partially enlarged schematic longitudinal sectional view showing the light emitting panel. 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. FIG. 20 is a vertical cross-sectional explanatory view (corresponding to FIG. 13) showing a light emitting device of a vehicle lamp, and a state in which the light emitting panel is visible through the outer lens when the vehicle lamp is not lit. be. FIG. 21 is a vertical cross-sectional view (a vertical cross-sectional view corresponding to FIGS. 7 and 9) showing Modification Example 1 of the light emitting device for a vehicle lamp and the excitation light control member for a vehicle lamp according to the present invention. FIG. 22 is a vertical cross-sectional view (a vertical cross-sectional view corresponding to FIGS. 7, 9, and 21) showing a second modification of the light emitting device for a vehicle lamp and the excitation light control member for a vehicle lamp according to the present invention. . FIG. 23 is a partial vertical sectional view (corresponding to FIGS. 7, 9, 21, and 22) showing a third modification of the light emitting device for a vehicle lamp and the excitation light control member for a vehicle lamp according to the present invention. FIG.

EMBODIMENT OF THE INVENTION Hereinafter, two embodiments (examples) of a light emitting device for a vehicle lamp and a vehicle lamp according to the present invention will be described based on the drawings. In this specification, front, rear, top, bottom, left, and right refer to the front, rear, top, bottom, left, and right when a vehicle is equipped with the light-emitting device of the vehicle light according to the present invention, or the vehicle light. It is.

1 to 4, FIGS. 6 to 11, FIG. 17, FIG. 18, and FIG. 21 to FIG. ” stands for “bottom,” “L” stands for “left,” and “R” stands for “right.” Here, the front refers to the rear side of the vehicle, and the back refers to the front side of the vehicle.

Note that the drawings are schematic diagrams showing the light emitting device for the vehicle light and the vehicle light according to the present invention, so the main parts of the light emitting device for the vehicle light and the vehicle light according to the present invention are illustrated, and the main parts are illustrated. Illustrations of other parts are omitted. Also, some hatching is omitted.

(Description of configuration of Embodiment 1)
1 to 16 show Embodiment 1 of a light emitting device for a vehicle lamp and a vehicle lamp according to the present invention. Hereinafter, the structure of the light emitting device of the vehicle lamp and the vehicle lamp according to the first embodiment will be explained.

(Description of vehicle light 100A)
In FIGS. 1 to 4, FIGS. 6 to 11, FIG. 13, and FIG. 16, the reference numeral 100A indicates a vehicle lamp according to the first embodiment. In this example, the vehicle lamp 100A is a tail lamp that constitutes a rear combination lamp. Note that the vehicle lamp 100A may be a stop lamp, a tail stop lamp, or a turn signal lamp in addition to a tail lamp.

The vehicle lamp 100A is attached to both left and right sides of the rear portion of a vehicle (not shown). The vehicle lamp 100A in this example is attached to the right side of the vehicle. Note that the vehicular lamp installed on the left side of the vehicle has a configuration obtained by inverting the configuration of the vehicular lamp 100A of this example, which is installed on the right side of the vehicle. Therefore, a description of the vehicle lamp installed on the left side of the vehicle will be omitted.

The light distribution of the tail lamp of the vehicle lamp 100A has a light distribution range (irradiation range) at a predetermined angle in the left-right direction and the up-down direction with respect to the reference axis Z (see FIGS. 6 to 10). The reference axis Z is parallel to the traveling direction of the vehicle (vehicle longitudinal direction, vehicle number line).

The vehicle lamp 100A includes 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 the first embodiment (hereinafter referred to as (referred to as "light emitting device 1A").

The lamp housing 100 is made of a light-opaque member (such as a resin member). The lamp housing 100 is black in this example. Note that it is sufficient if the inner surface of the lamp housing 100 (the surface facing the lamp chamber 104) is black. Further, the lamp housing 100 may be of a color other than black.

The lamp lens 101 is made of a light-transmitting resin member such as PMMA or PC, or a light-transmitting glass. The lamp lens 101 is a transparent outer cover, an outer lens, or the like. In this example, the lamp lens 101 is composed of a red lens. The lamp lens 101, which is a red lens, absorbs blue excitation lights L11, L12, and L13, which will be described later, from the light emitting device 1A. Thereby, this vehicle lamp 100A can eliminate variations in the chromaticity of the light emitted from the lamp lens 101 and satisfy the tail lamp regulations.

Note that the lamp lens 101 may be composed of a colorless lens other than a red lens, or a yellow-orange lens. Lamp lens 101 is attached to lamp housing 100. Thereby, 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.

The inner panel 102 is arranged along the lamp lens 101 from the center to the upper and lower sides of the lamp chamber 104 . Further, the inner panel 102 is arranged between the lamp lens 101 and the excitation light sources 1L, 2L, 3L and excitation light control members 1C, 2C, 3C, which will be described later, of the light emitting device 1A. Inner panel 102 is attached to lamp housing 100 via a mounting member (not shown).

The inner panel 102 is made of a light-opaque member (such as a resin member). In this example, the inner panel 102 is black, like 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. Furthermore, the inner panel 102 may have a color other than black, and at least one of the outer and inner surfaces may be coated with a color other than black or metal vapor deposition.

As shown in FIGS. 5 and 8 to 11, the reflector 103 connects the lamp housing 100, the light emitting device 1A, the second light emitting panel 2P of the second light emitting unit 2U (described later), and the second filter of the excitation light filter 1F (described later). 12F. The reflector 103, like the inner panel 102, is attached to the lamp housing 100 via a mounting member (not shown). The reflector 103 allows the second-secondary light L22 from the second light emitting unit 2U to pass through the lamp lens 101 from outside the lamp chamber 104, that is, from inside the lamp chamber 104, and reflects it to the outside of the lamp chamber 104.

(Description of light emitting device 1A)
As shown in FIGS. 10 and 11, the light emitting device 1A is attached to the lamp housing 100 via a bracket 105 as a mounting member. As shown in FIGS. 5 to 11, the light emitting device 1A includes a plurality of, in this example, three light emitting units 1U, 2U, and 3U, and an excitation light filter 1F, and a plurality of, in this example, a light emitting unit 1U. , 2U, and 3U, the same number of excitation light control members 1C, 2C, and 3C are provided.

(Description of light emitting units 1U, 2U, 3U, 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 arranged from the left side of the vehicle (center side of the vehicle) to the right side of the vehicle (outside the vehicle). They are referred to as a first light emitting unit 1U, a second light emitting unit 2U, a third light emitting unit 3U, a first excitation light control member 1C, a second excitation light control member 2C, and a third excitation light control member 3C.

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 are each composed of three independent sets. Configure the assembly.

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

(Description of light emitting units 1U, 2U, 3U)
The three light emitting units 1U, 2U, and 3U have excitation light sources 1L, 2L, and 3L, and light emitting panels 1P, 2P, and 3P, respectively. In this example, the three excitation light sources 1L, 2L, 3L and the light emitting panels 1P, 2P, 3P are arranged from the left side of the vehicle (center side of the vehicle) to the right side of the vehicle (outside the vehicle), a first excitation light source 1L, They are referred to as a second excitation light source 2L, a third excitation light source 3L, a first light emitting panel 1P, a second light emitting panel 2P, and a third light emitting panel 3P.

(Description of excitation light control members 1C, 2C, and 3C)
The three excitation light control members 1C, 2C, and 3C control the excitation light L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L of the three light emitting units 1U, 2U, and 3U (Figs. 5, 7, and 9). , see the solid line arrows in FIGS. 11 and 12(B)) to control the excitation light source 1L of one light emitting unit 1U (2U, 3U) of the three light emitting units 1U, 2U, and 3U. The excitation light L11 (L12, L13) from (2L, 3L) is transmitted to other light emitting units 2U as stray excitation light L31 (L32, L33), as shown by the solid line arrows in FIGS. 7, 9, and 11. and 3U (1U and 3U, 1U and 2U) and prevents it from entering the light emitting panels 2P and 3P (1P and 3P, 1P and 2P). In this example, the three excitation light control members 1C, 2C, and 3C have a reflection member 40 and a shielding member 41, as shown in FIGS. 6 to 11.

The reflecting member 40 is a reflecting surface based on a paraboloid of revolution whose focal point is at or near the excitation light sources 1L, 2L, 3L. The reflecting member 40 has a plurality of segments divided vertically and horizontally. The plurality of segments of the reflecting member 40 reflect excitation light L11, L12, L13 from the excitation light sources 1L, 2L, 3L in a predetermined direction, in this example, toward the light emitting panels 1P, 2P, 3P. As shown in FIG. 15, the excitation lights L11, L12, and L13 reflected by the reflecting member 40 are controlled to have a predetermined light distribution DL and are irradiated onto the light emitting panels 1P, 2P, and 3P.

As shown in FIG. 15, the predetermined light distribution DL has a substantially rectangular shape, and has a light distribution range that includes the light emitting film 510 as a light conversion film, even if it is narrow among the light emitting panels 1P, 2P, and 3P. Further, 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 height difference in luminous intensity (illuminance) within the light distribution range. That is, the intensity of light within the emission range may change continuously.

The shielding member 41 is made of a light-opaque member, and includes a first opening 411 through which the excitation lights L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L pass, and an excitation light L11 reflected by the reflection member 40. It has a second opening 412 through which L12 and L13 pass. Of the excitation lights L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L, the shielding member 41 mainly directs the excitation lights that travel to a direction other than the reflecting member 40 side, that is, the stray excitation lights L31, L32, and L33, to the first Of the excitation lights L11, L12, and L13 that are shielded at the edge of the opening 411 and reflected by the reflection member 40, the excitation lights that travel to a direction other than the light emitting panels 1P, 2P, and 3P side, that is, stray excitation lights L31, L32 , L33 are mainly shielded at the edge of the second opening 412.

(Description of excitation light sources 1L, 2L, 3L)
In this example, the three excitation light sources 1L, 2L, and 3L include a substrate 42 and a light emitting element 43, as shown in FIGS. 6 to 11. The substrate 42 is attached to the shielding member 41 of the excitation light control members 1C, 2C, and 3C via a mounting bracket.

The light emitting element 43 is mounted on the surface of the substrate 42 that faces the reflective member 40 through the first opening 411 . In this example, the light emitting element 43 is a blue LED having a main wavelength of 450 nm. That is, in this example, the excitation lights L11, L12, and L13 emitted from the light emitting element 43 in a Lambertian shape (radially) are blue light in the range of 300 nm to 500 nm. The light emitting element 43 is composed of one or more blue LEDs. Note that as the light emitting element 43, other than the blue LED, for example, an LD (semiconductor laser) or the like may be used. Furthermore, the excitation lights L11, L12, and L13 may be violet light, ultraviolet light, or the like having a shorter wavelength than blue light.

Note that 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 L12 emitted from the third excitation light source 3L is referred to as the second excitation light L12. The excitation light L13 is referred to as third excitation light L13.

(Description of excitation light filter 1F)
The excitation light filter 1F does not transmit the excitation lights L11, L12, and L13. That is, the excitation light filter 1F 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, and does not transmit the excitation light L11, L12, L13 of the excitation light L11, L12, L13 having a wavelength in the range of at least about 300 nm to about 500 nm. Among the emitted secondary lights L21, L22, and L23 (see the broken line arrows in Figures 5, 7, 9, 11, and 12 (B)), at least a wavelength in the range of about 500 nm to about 780 nm is used. It is a transparent plate that transmits the secondary lights L21, L22, and L23 with a transmittance of about 90% or more.

The excitation light filter 1F uses, for example, red glass, orange glass, transparent glass with a blue filter layer formed thereon, or the like. 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.

As shown in FIGS. 6 to 9, the excitation light filter 1F is inclined so that the upper part is located on the lamp lens 101 side and the lower part is located on the lamp housing 100 side. In addition, as shown in FIGS. 10 and 11, the excitation light filter 1F includes a first filter section 11F in the left-right direction, a first connecting section 14F in the front-back direction, and a second filter section in the left-right direction, as seen from above. 12F, a second connecting portion 15F in the front-rear direction, and a third filter portion 13F in the left-right direction.

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

(Explanation of light emitting panels 1P, 2P, 3P)
The light emitting panels 1P, 2P, and 3P are excited by the excitation lights L11, L12, and L13 emitted from the excitation light sources 1L, 2L, and 3L, and emit secondary lights L21, L22, and L23. It emits light, as shown in the diagonal grid hatched areas inside. As shown in FIGS. 12(A) and 12(B), the light emitting panels 1P, 2P, and 3P include a substrate (supporting substrate) 500, a light emitting film (light emitting layer, OPL) 510, a secondary light emitting surface 520, It has a reflective film (reflective layer) 530, a reflective surface 540, and sealants 550 and 560.

Note that the secondary light L21 emitted from the first light emitting panel 1P is referred to as the 1st-secondary light L21, the secondary light L22 emitted from the second light emitting panel 2P is referred to as the 2nd-2nd order light L22, and the 3rd order light L22 is referred to as the 2nd-secondary light L22. The secondary light L23 emitted from the light emitting panel 3P is referred to as 3rd-secondary light L23. Note that between the "first" and "secondary light L21", between the "second" and "secondary light L22", and between the "third" and "secondary light L23", A "-" is inserted in each to eliminate the confusion of consecutive numbers, for example, "12th order light L21," "22nd order light L22," and "32nd order light L23."

As shown in FIGS. 5 to 11, the three light emitting panels 1P, 2P, and 3P are coated on one side, the other side, and one side of the excitation light filter 1F by vapor deposition, wet method (spin coating, spraying, etc.). , has been formed (fabricated). That is, the first light emitting panel 1P is on one side of the first filter section 11F, the second light emitting panel 2P is on the other side of the second filter section 12F, and the third light emitting panel 3P is on the other side of the third filter section 13F. Each is formed on one side. The sealing material 560 of the light emitting panels 1P, 2P, and 3P is bonded to the excitation light filter 1F. Thereby, 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 surface and the other surface of the excitation light filter 1F. In addition, in FIGS. 12(A) and (B), the first light emitting panel 1P and the third light emitting panel 3P are located on one surface of the excitation light filter 1F (the left side surface in FIGS. 12(A) and (B)). The second light emitting panel 2P is formed on the other surface of the excitation light filter 1F (the right surface in FIGS. 12A and 12B). The excitation light filter 1F is a support substrate that supports the light emitting panels 1P, 2P, and 3P.

The substrate 500 is made of a light-transmissive resin member such as PMMA or PC, a light-transmissive glass, etc., and transmits the excitation light L11, L12, L13 and the secondary light L21, L22, L23. The substrate 500 may be flexible or rigid. The substrate 500 has a plate shape. In this example, glass is used for the substrate 500.

The light-emitting film 510 is formed (film-formed) on one surface of the substrate 500. The light emitting film 510 uses an organic material with a dominant wavelength of 650 nm. Note that the material of the light emitting film 510 may be a material made of at least one of an organic phosphor material and an organic phosphor material. The light emitting film 510 is sandwiched on both sides by one or more semiconductor films (semiconductor layers). The combination of semiconductor films is arbitrary.

The light emitting film 510 is excited by the excitation lights L11, L12, and L13 and emits secondary lights L21, L22, and L23 in all directions (see the circles in FIG. 12(B)). As a result, the light emitting film 510 emits light from the entire surface in this example, as shown in the diagonally hatched portions in FIGS. 2 to 4. Here, the intensity of the secondary light L2 can be adjusted by adjusting the thickness of the light emitting film 510. That is, if the thickness of the light-emitting film 510 is increased, the secondary light L2 can be strongly adjusted, and on the other hand, if the thickness of the light-emitting film 510 is decreased, the secondary light L2 can be adjusted weakly.

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

The secondary lights L21, L22, and L23 are red lights in this example. The dominant wavelength of red light is 650 nm, which is longer than 500 nm. Thus, the dominant wavelengths of the secondary lights L21, L22, and L23 are longer than 500 nm, and longer than the dominant wavelengths of 450 nm of the excitation lights L11, L12, and L13. Note that the secondary lights L21, L22, and L23 in this example are red lights for tail lamps. Red light is used in stop lamps and tail/stop lamps in addition to tail lamps. Note that 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 the vehicle lamp.

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

As a result, the vehicle lamp 100A can emit surface light from the secondary lights L21, L22, and L23 emitted from the secondary light emitting surface 520. Note that the total light emitting area of the secondary light emitting surface 520 is 10 mm ² or more. This makes it possible to satisfy vehicle regulations regarding brightness.

The reflective film 530 is formed (film-formed) 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 range of visible light, such as a metal material such as aluminum, silver, other metals (tungsten), or alloys thereof. As a result, even if variations in reflectance occur due to manufacturing tolerances, the reflective film 530 can absorb this variation.

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

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 silicone resin, SiN film, etc. 550 and an aluminum wheel 560. Note that the sealing materials 550 and 560 are not limited to this example.

(Explanation of the light-emitting design of the light-emitting film 510 of the light-emitting panels 1P, 2P, and 3P)
The light-emitting design of the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P can be arbitrarily changed by arbitrarily changing the design (pattern, shape, graphic, external shape, etc.) of the light-emitting films 510.

For example, the light-emitting film 510 can have different light-emitting patterns in the same shape, as shown in FIGS. 2 to 4 and FIGS. 14(A), (B), (C), and (D). FIG. 14(A) shows a full-surface light emitting pattern. FIG. 14(B) shows a basket-eye pattern (basket-eye pattern). FIG. 14(C) is a hemp leaf pattern (hemp leaf pattern). FIG. 14(D) shows a horizontal striped pattern (a horizontal striped pattern in which the vertical width of the horizontal stripe at the center is large and the vertical width of the horizontal stripe gradually decreases as it goes up and down). Note that FIG. 14 is illustrated in gray scale, and the parts shown in dark gray are the light-emitting parts.

In addition, the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P have different light-emitting designs (light-emitting shapes and light-emitting shapes) within a predetermined light distribution DL, as shown in FIGS. patterns) can be formed. 15(A) and (B) have the same shape, FIG. 15(A) shows a light emitting pattern on the entire surface, and FIG. 15(B) shows a light emitting pattern on a group of horizontally long rods. FIG. 15(C) shows a horizontally elongated light emitting design with three upper and lower lights. FIG. 15(D) shows a light emitting design with three horizontal Vs on the left and right sides. In addition, in FIG. 15, within the predetermined light distribution DL, the excitation lights L11, L12, and L13 are blue, and the portions with diagonal grid hatching (black portions in FIG. 15(B)) are , the secondary lights L21, L22, and L23 are red.

Note that FIGS. 14 and 15 described above are partial examples of the light-emitting designs of the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P, and the light-emitting designs of the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P are as follows. There are infinite.

(Explanation of action of Embodiment 1)
The light emitting device 1A and the vehicle lamp 100A according to the first embodiment have the above configurations, and their functions will be described below.

(Explanation of non-emission state of light emitting panels 1P, 2P, and 3P)
First, as shown in FIG. 1, FIG. 5(A), FIG. 6, FIG. 8, and FIG. Panels 1P, 2P, and 3P are in a non-emission state. Therefore, when looking inside the lamp chamber 104 from the lamp lens 101, as shown in FIG. 1, the light emitting panels 1P, 2P, and 3P in the non-emitting state are not noticeable, and only the black color of the lamp housing 100 is visible. Note that in FIG. 1, the black color of the lamp housing 100 is shown without color.

Here, in this example, the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P of the light-emitting device 1A are made of 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 on the reflective 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 by the reflection members 40 of the first excitation light control member 1C and the third excitation light control member 3C as re-reflected external light L44. This re-reflected external light L44 is again reflected by the reflection members 40 of the first excitation light control member 1C and the third excitation light control member 3C as re-reflected external light L45. This re-reflected external light L45 passes through the lamp lens 101 from inside the lamp chamber 104 and is emitted outside the lamp chamber 104 as output external light L46. This emitted external light L46 enters the human eye E. As a result, it appears to a person that there is nothing inside the light chamber 104. That is, the first light emitting panel 1P and the third light emitting panel 3P are not visible to the human eye E.

The second light emitting panel 2P is formed on the other surface of the excitation light filter 1F (the surface facing the lamp housing 100), so it is not visible to the human eye E due to the excitation light filter 1F.

Further, since the lamp lens 101 has a red color, it can absorb the blue light of the external light (external light) L41. As a result, the blue light of the external light L41 passes through the lamp lens 101 and excites the light-emitting films 510 of the light-emitting panels 1P, 2P, and 3P in the lamp chamber 104 to emit secondary lights L21, L22, and L23, It is possible to prevent the situation where the red light is turned on incorrectly.

(Explanation of the light emitting state of the first light emitting panel 1P)
Then, as shown in FIGS. 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 first excitation light L11 (blue light) is emitted from the light emitting element 43. 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 reflection member 40 of the first excitation light control member 1C, and is reflected by the first excitation light control member 1C. The light passes through the second opening 412 of the shielding member 41, is controlled to have a predetermined light distribution DL, and enters the first light emitting panel 1P of the first light emitting unit 1U.

At this time, the first excitation light control member 1C uses the reflection member 40 to direct 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. irradiate. At the same time, the first excitation light control member 1C uses the shielding member 41 to shield part of the stray excitation light L31 of the first excitation light L11 from the first excitation light source 1L. Thereby, the first excitation light control member 1C prevents the stray excitation light L31 from straying and entering 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. be able to. That is, it is possible to prevent a situation in which the second light emitting panel 2P and the third light emitting panel 3P erroneously emit light.

Moreover, the excitation light filter 1F absorbs the first excitation light L11 that is not irradiated onto the first light emitting panel 1P of the first light emitting unit 1U, out of the first excitation light L11 from the first excitation light source 1L. As a result, the excitation light filter 1F allows the first excitation light L11 that is not irradiated onto the first light emitting panel 1P and not used for light emission of the first light emitting panel 1P to be transmitted to the second light emitting panel 2P of the second light emitting unit 2U and It is possible to prevent a situation in which the light enters the third light emitting panel 3P of the third light emitting unit 3U and causes the second light emitting panel 2P and the third light emitting panel 3P to erroneously emit light.

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

A portion of the first-second order light L21 passes through the light emitting film 510 and is reflected by the reflective surface 540 toward the light emitting film 510 side. The reflected first-secondary 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 side. The remainder of the first-secondary 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 side.

The first excitation light L11 that has passed through the light-emitting film 510 and reached the reflective surface 540 is reflected by the reflective surface 540 toward the light-emitting film 510, and excites the first-second order 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 emitting surface 520 toward the lamp lens 101 side.

The first-secondary light L21 emitted from the secondary light emitting surface 520 to the lamp lens 101 side passes through the substrate 500, passes through the lamp chamber 104, passes through the lamp lens 101, and enters the vehicle lamp 100A. The exterior of the vehicle is illuminated with a predetermined tail lamp light distribution pattern. At this time, the light emitting film 510 emits light from the surface, forming a light emitting surface as shown in FIG. 2 (diagonal lattice hatching in FIG. 2).

(Explanation of the light emitting state of the first light emitting panel 1P and the second light emitting panel 2P)
Next, as shown in FIGS. 3, 5(C), and 9, while the light emitting element 43 of the first excitation light source 1L of the first light emitting unit 1U remains lit, the The light emitting element 43 of the second excitation light source 2L is turned on. Then, the second excitation light L12 (blue light) is emitted from the light emitting element 43. 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 reflection member 40 of the second excitation light control member 2C, and is reflected by the second excitation light control member 2C. The light passes through the second opening 412 of the shielding member 41, is controlled to have a predetermined light distribution DL, and enters the second light emitting panel 2P of the second light emitting unit 2U.

At this time, the second excitation light control member 2C uses the reflection member 40 to direct the second excitation light L12 from the second excitation light source 2L to the second light emitting unit 2U in the same way as the first excitation light control member 1C. The second light emitting panel 2P is irradiated with a predetermined light distribution DL. At the same time, the second excitation light control member 2C uses the shielding member 41 to shield part of the stray excitation light L32 of the second excitation light L12 from the second excitation light source 2L. Thereby, the second excitation light control member 2C prevents the stray excitation light L32 from straying and 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. be able to. That is, it is possible to prevent a situation 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 a light-emitting state, there is no problem in particular with the first light-emitting panel 1P. This is effective when emitting light.

Moreover, the excitation light filter 1F absorbs the second excitation light L12 that is not irradiated onto the second light emitting panel 2P of the second light emitting unit 2U, out of the second excitation light L12 from the second excitation light source 2L. As a result, the excitation light filter 1F allows the second excitation light L12 that is not irradiated onto the second light emitting panel 2P and not used for light emission of the second light emitting panel 2P to the first light emitting panel 1P and the second light emitting panel 1P of the first light emitting unit 1U. It is possible to prevent a situation in which the light enters the third light emitting panel 3P of the third light emitting unit 3U and causes the first light emitting panel 1P and the third light emitting panel 3P to erroneously emit light. In this example, since the first light-emitting panel 1P is in a light-emitting state, there is no problem in particular with the first light-emitting panel 1P. This is effective when emitting light.

The light-emitting film 510 of the second light-emitting panel 2P of the second light-emitting unit 2U emits the second-secondary light L22 (red light) in all directions by the incidence of the second excitation light L12 controlled to a predetermined light distribution DL. discharge. This second-secondary light L22 is emitted toward the lamp housing 100 in the opposite direction to the exit direction of the first-secondary light L21, and is reflected by the reflector 103 toward the lamp lens 101.

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

(Explanation of light emitting status of light emitting panels 1P, 2P, and 3P)
Then, as shown in FIGS. 4, 5(D), and 11, 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 While the light remains on, the light emitting element 43 of the third excitation light source 3L of the third light emitting unit 3U is 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 the first opening (not shown) of the shielding member 41 of the third excitation light control member 3C, is reflected by the reflection member 40 of the second excitation light control member 2C, and is excited by the third excitation light L13. The light passes through the second opening (not shown) of the shielding member 41 of the light control member 3C, is controlled to have a predetermined light distribution DL, and enters the third light emitting panel 3P of the third light emitting unit 3U.

At this time, the third excitation light control member 3C, in the same way as the first excitation light control member 1C and the second excitation light control member 2C, uses the reflection member 40 to control the third excitation light L13 from the third excitation light source 3L. is irradiated onto the third light emitting panel 3P of the third light emitting unit 3U with a predetermined light distribution DL. At the same time, the third excitation light control member 3C uses the shielding member 41 to shield part of the stray excitation light L33 of the third excitation light L13 from the third excitation light source 3L. Thereby, the third excitation light control member 3C prevents the stray excitation light L33 from straying into 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. be able to. That is, it is possible to prevent a situation where the first light emitting panel 1P and the second light emitting panel 2P erroneously emit light. In this example, since the first light emitting panel 1P and the second light emitting panel 2P are in the light emitting state, there is no particular problem, but it is effective when only the third light emitting panel 3P is made to emit light.

Moreover, the excitation light filter 1F absorbs the third excitation light L13 that is not irradiated onto the third light emitting panel 3P of the third light emitting unit 3U, out of the third excitation light L13 from the third excitation light source 3L. As a result, the excitation light filter 1F allows the third excitation light L13 that is not irradiated onto the third light emitting panel 3P and not used for light emission of the third light emitting panel 3P to the first light emitting panel 1P and the third light emitting panel 1P of the first light emitting unit 1U. It is possible to prevent a situation in which the light enters the second light emitting panel 2P of the second light emitting unit 2U and causes the first light emitting panel 1P and the second light emitting panel 2P to erroneously emit light. In this example, since the first light emitting panel 1P and the second light emitting panel 2P are in the light emitting state, there is no particular problem, but it is effective when only the third light emitting panel 3P is made to emit light.

The light emitting film 510 of the third light emitting panel 3P of the third light emitting unit 3U emits the 3rd-secondary light L23 (red light) in all directions by the incidence of the third excitation light L13 controlled to a predetermined light distribution DL. discharge. This 3rd-second order light L23 is emitted to the lamp lens 101 side.

As a result, the 3rd-second order light L23 passes through the lamp lens 101 and is irradiated to the outside of the vehicle lamp 100A in a predetermined tail lamp light distribution pattern. At this time, the light emitting film 510 emits light from the surface and forms a light emitting surface as shown in FIG. 4 (diagonal lattice hatching in FIG. 4).

As a result, as shown in FIGS. 2 to 4, the vehicle lamp 100A passes through the lamp lens 101 to the light emitting surface of the light emitting film 510 (the diagonal lattice in FIGS. hatching) can be visually recognized. Note that the black color (or a color other than black) of the inner panel 102 is visible in the upper and lower parts of the light chamber 104.

(Explanation of sequential light emission)
Further, the vehicle lamp 100A changes from the non-emitting state of the light-emitting panels 1P, 2P, and 3P in FIG. 1 to the light-emitting state of the first light-emitting panel 1P in FIG. Sequential light emission can be obtained through the light emitting state of the panel 2P, through the light emitting state of the light emitting panels 1P, 2P, and 3P in FIG. 4, and then into the non-light emitting state of the light emitting panels 1P, 2P, and 3P in FIG.

(Explanation of segment light emission)
Furthermore, as shown in FIG. 16, the vehicle lamp 100A sets one first light emitting panel 1P to a light emitting state (the state shown in FIG. 16(A)), and also sets one second light emitting panel 2P to a light emitting state. (the state shown in FIG. 16(B)), one third light-emitting panel 3P is in the light-emitting state (the state shown in FIG. 16(C)), and the two first light-emitting panels 1P and The two light-emitting panels 2P are set to a light-emitting state (the state shown in FIG. 16(D)), and the two first light-emitting panels 1P and the third light-emitting panel 3P are set to a light-emitting state (the state shown in FIG. 16(E)), Further, the two second light emitting panels 2P and the third light emitting panel 3P are set to the light emitting state (the state shown in FIG. 16(F)), and the three first light emitting panels 1P, the second light emitting panel 2P, and the third light emitting panel Segment light emission is obtained by setting the light-emitting panel 3P to a light-emitting state (the state shown in FIG. 16(G)) and setting the three light-emitting panels 1P, 2P, and 3P to a non-light-emitting state (the state shown in FIG. 16(H)). be able to.

(Explanation of effects of Embodiment 1)
The light emitting device 1A and the vehicle lamp 100A according to the first embodiment have the above-described configuration and operation, and the effects thereof will be explained below.

In a light emitting device 1A and a vehicle lamp 100A according to the first embodiment, three light emitting units 1U, 2U, and 3U have excitation light sources 1L, 2L, and 3L that emit excitation lights L11, L12, and L13, respectively, and It has light emitting panels 1P, 2P, and 3P that emit light by being excited by lights L11, L12, and L13 and emits secondary lights L21, L22, and L23, and the first light emitting unit 1U is on one side of the excitation light filter 1F. Furthermore, 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 the one side of the excitation light filter 1F. The excitation light filter 1F is disposed outside the vehicle and does not transmit the excitation lights L11, L12, and L13.

As a result, in the light emitting device 1A and vehicle lamp 100A according to the first embodiment, when the first excitation light source 1L is turned on, the excitation light filter 1F filters out the first excitation light L11 from the first excitation light source 1L. , absorbs the first excitation light L11 that was not irradiated onto the first light emitting panel 1P of the first light emitting unit 1U. As a result, in the light emitting device 1A and the vehicle lamp 100A according to the first embodiment, the first excitation light that is not irradiated onto the first light emitting panel 1P and not used for light emission from the first light emitting panel 1P is caused by the excitation light filter 1F. The light L11 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, causing the second light emitting panel 2P and the third light emitting panel 3P to erroneously emit light. It can be prevented.

Further, in the light emitting device 1A and 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 uses the second excitation light source 2L or the third excitation light source 3L. Of the second excitation light L12 from the light source 2L, the second excitation light L12 that was not irradiated to 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 , absorbs the third excitation light L13 that was not irradiated onto the third light emitting panel 3P of the third light emitting unit 3U. As a result, in the light emitting device 1A and the vehicle lamp 100A according to the first embodiment, the second excitation light that is not irradiated onto the second light emitting panel 2P and not used for light emission from the second light emitting panel 2P is caused by the excitation light filter 1F. A state in which the light L12 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, causing the first light emitting panel 1P and the third light emitting panel 3P to erroneously emit light; Alternatively, the third excitation light L13 that is not irradiated to the third light emitting panel 3P and not used for light emission of the third light emitting panel 3P is transmitted to the first light emitting panel 1P of the first light emitting unit 1U and the third excitation light L13 that is not used for light emission of the third light emitting panel 3P. It is possible to prevent a situation in which the light enters the two light emitting panels 2P and causes the first light emitting panel 1P and the second light emitting panel 2P to emit light incorrectly.

As a result, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can obtain sequential light emission and segment light emission as explained in the above-mentioned operation, and moreover, can emit a plurality of lights, in this example, three lights. Functions such as a tail lamp function and a stop lamp function, lamp functions with different patterns, lamp functions with different light emitting surfaces and brightness of irradiated light, etc. can be obtained. That is, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can provide a plurality of light emitting functions.

In the light emitting device 1A and the 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 formed on one side or the other side of the excitation light filter 1F, respectively. It has a light-emitting film 510 as a light conversion film that emits light by emitting secondary light L21, L22, L23 when excited by excitation light L11, L12, L13, and this light-emitting film 510 can be shaped into any shape. It is something that is being formed.

As a result, the light emitting device 1A and the vehicle lamp 100A according to Embodiment 1 have various sequential light emission, segment light emission, and three light emission functions in addition to the sequential light emission, segment light emission, and three light emission functions described above. Light emitting function can be obtained. For example, if the light-emitting film 510 is formed with letters such as "STOP" or "Stop", communication light emission can be obtained in a tail lamp or a stop lamp.

The light emitting device 1A and the vehicle lamp 100A according to the first embodiment control the excitation lights L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L of the three light emitting units 1U, 2U, and 3U, respectively. The excitation light L11 (L12, L13) from the excitation light source 1L (2L, 3L) of each light emitting unit 1U (2U, 3U) is transmitted as stray excitation light L31 (L32, L33) to other light emitting units 2U and 3U ( 1U and 3U, 1U and 2U) and light emitting panels 2P and 3P (1P and 3P, 1P and 2P) are provided with excitation light control members 1C, 2C, and 3C that prevent the light from entering the light emitting panels 2P and 3P (1P and 3P, 1P and 2P).

As a result, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment control the stray excitation light L31 (L32, L33) of one light emitting unit 1U (2U, 3U) by the excitation light control members 1C, 2C, 3C. ) can be prevented from straying into 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) and entering the light emitting panels 2P and 3P (1P and 3P, 1P and 2P). A plurality of controlled light emitting functions are obtained.

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

As a result, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment reflect the excitation lights L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L to the light emitting units 1U, 2U, and 3U using the reflection member 40. The light emitting panels 1P, 2P, and 3P can be irradiated with a predetermined light distribution DL, and at the same time, the shielding member 41 prevents stray excitation of some of the excitation lights L11, L12, and L13 from the excitation light sources 1L, 2L, and 3L. It is capable of blocking the lights L31, L32, and L33.

As a result, in the light emitting device 1A and vehicle lamp 100A according to the first embodiment, stray excitation light L31 (L32, L33) of one light emitting unit 1U (2U, 3U) is transmitted to other light emitting units 2U and 3U ( It is possible to prevent the situation where the light strays into the light emitting panels 2P and 3P (1P and 3P, 1P and 2P) of the 1U and 3U, 1U and 2U), and provides highly precisely controlled multiple light emitting functions. .

The excitation light filter 1F of the light emitting device 1A and the vehicle lamp 100A according to the first embodiment is configured so that, among the excitation lights L11, L12, and L13, the excitation light L11, L12, and L13 have wavelengths ranging from at least about 300 nm to about 500 nm. Of the secondary lights L21, L22, and L23 emitted by the light-emitting panels 1P, 2P, and 3P, the secondary lights L21, L22, and L23 having wavelengths in the range of at least about 500 nm to about 780 nm are transmitted at approximately 90 nm. It is a transparent plate that transmits light with a transmittance of % or more.

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 lights L11, L12, L13 due to the excitation light filter 1F, and can also use blue light as the secondary lights L21, L22. , L23, red light or yellow-orange light is obtained. Moreover, the light emitting device 1A and the vehicle lamp 100A according to the first embodiment can minimize the loss of the secondary lights L21, L22, and L23 of red light and yellow-orange light caused by the excitation light filter 1F. , the secondary lights L21, L22, and L23 of red light and yellow-orange light can be used with high efficiency.

The excitation light filter 1F of the light emitting device 1A and the vehicle lamp 100A according to the first embodiment includes a first filter section 11F, a second filter section 12F, and a third filter section 13F in three stages in the left and right direction, and two stages in the front and rear direction. It has a first connecting part 14F and a second connecting part 15F of the stage. As a result, in the excitation light filter 1F of the light emitting device 1A and vehicle lamp 100A according to the first embodiment, the stray excitation light L31 (L32, L33) of one light emitting unit 1U (2U, 3U) is It is possible to prevent the incident light from straying into the light emitting panels 2P and 3P (1P and 3P, 1P and 2P) of the units 2U and 3U (1U and 3U, 1U and 2U).

The vehicle lamp 100A according to the first embodiment has a lamp housing 100, a second light emitting panel 2P of the second light emitting unit 2U of the light emitting device 1A, and a second filter section 12F of the excitation light filter 1F in the light chamber 104. A reflector 103 is disposed between them, and this reflector 103 transmits the second-secondary light L22 from the second light emitting unit 2U through the lamp lens 101 from outside the lamp chamber 104, that is, from inside the lamp chamber 104. The light is reflected to the outside of the lamp chamber 104.

As a result, in the vehicle lamp 100A according to the first embodiment, the reflector 103 reflects the 2nd-secondary light L22 emitted toward the lamp housing 100 toward the lamp lens 101. Since the second-order light L22 can be transmitted and irradiated from inside the lamp chamber 104 to the outside, the second-secondary light L22 can be effectively used.

The vehicle lamp 100A according to the first embodiment, as a light chamber forming member, does not transmit the excitation lights L11, L12, L13 from the light emitting device 1A, but transmits the secondary lights L21, L22, L23 from the light emitting device 1A. It has a lamp lens 101 as an outer lens.

As a result, in the vehicle lamp 100A according to the first embodiment, the excitation light L11, L12, L13 is not transmitted through the lamp lens 101, but the secondary light L21, L22, L23 is transmitted. There is no variation in chromaticity, and the vehicle lighting regulations can be met.

The vehicle lamp 100A according to the first embodiment functions as an outer lens that does not transmit the excitation light L11, L12, L13 from the light emitting device 1A, but transmits the secondary light L21, L22, L23 from the light emitting device 1A. The lamp lens 101 is red or yellow-orange, the excitation lights L11, L12, L13 are blue light, and the secondary lights L21, L22, L23 are red light or yellow-orange light. It is something.

As a result, in the vehicle lamp 100A according to the first embodiment, the excitation lights L11, L12, and L13, which are blue lights, are not transmitted through the lamp lens 101, which is red or yellow-orange, and the red light or yellow light is not transmitted. Since the secondary lights L21, L22, and L23, which are orange lights, are transmitted, 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 satisfied.

(Explanation of configuration, action, and effect of Embodiment 2)
17 to 20 show a second embodiment of a light emitting device for a vehicle lamp and a vehicle lamp according to the present invention. Hereinafter, the configuration, operation, and effects of the light emitting device 1B of the vehicle lamp and the vehicle lamp 100B according to the second embodiment will be explained. In the figure, the same reference numerals as in FIGS. 1 to 16 indicate the same components.

The light-emitting device 1A of the vehicle lamp and the vehicle lamp 100A according to the first embodiment described above use light-emitting panels 1P, 2P, and 3P made of organic light-emitting materials. On the other hand, the light emitting device 1B of the vehicle lamp and the vehicle lamp 100B according to the second embodiment use light emitting panels 10P, 20P, and 30P made of inorganic light emitting materials.

As shown in FIG. 19, the light-emitting films (light-emitting layers) of the light-emitting panels 10P, 20P, and 30P made of inorganic light-emitting materials include a light-transmitting binder material 570 containing inorganic phosphor particles 580. Heat treated at 150°C or 500°C. As the binder material 570, for example, transparent resin silicone or transparent SiO2 is used. As the inorganic phosphor particles 580, for example, a powdered red light emitter CASN:Eu is used.

The light-emitting panels 10P, 20P, and 30P made of inorganic light-emitting materials are formed by squeegeeing a binder material 570 of a light-emitting film (light-emitting layer) and inorganic phosphor particles 580 on a substrate 500 through a design mask. or form using a doctor blade.

The light-emitting films (binder material 570 and inorganic phosphor particles 580) of the light-emitting panels 10P, 20P, and 30P of the light-emitting device 1B of Embodiment 2 use an inorganic light-emitting material. 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 particles 580 of the light emitting films of the first light emitting panel 10P and the third light emitting 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 outside the lamp chamber 104 as external light L48. This emitted external light L48 enters the human eye E. As a result, a person can see the first light-emitting panel 10P and the third light-emitting panel 30P in the lamp room 104, as shown by broken lines in FIGS. 17 and 18. Further, the second light emitting panel 20P is also visible through the excitation light filter 1F.

The light emitting device 1B for a vehicle light and the vehicle light 100B according to the second embodiment can achieve the same effects as the light emitting device 1A for a vehicle light and the vehicle light 100A according to the first embodiment. .

(Description of modification 1 of excitation light control member)
FIG. 21 is a longitudinal sectional view showing a modification 1 of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B of the vehicle lamp and the vehicle lamp 100A, 100B according to the present invention.

The excitation light control member 1C (2C, 3C) has a reflection member 40 and a shielding member 41. On the other hand, the excitation light control member 1C (2C, 3C) of Modification 1 includes a lens member 45 having an entrance surface 450 and an exit surface 451, and a shielding member 410 having an opening 413. be. The lens member 45 allows the excitation light L11 (L12, L13) to enter from the entrance surface 450 and exit from the exit surface 451. It is refracted at a predetermined angle on at least one surface (in this example, the entrance surface 450). The opening 413 of the shielding member 410 transmits the excitation light L11 (L12, L13) emitted from the output surface 451 of the lens member 45 to the light emitting panels 1P, 10P (2P, 20P, 3P, 30P) with a predetermined light distribution DL. irradiate.

The excitation light control member 1C (2C, 3C) of Modification 1 can achieve the same effects as the excitation light control member 1C (2C, 3C) described above.

(Description of modification example 2 of excitation light control member)
FIG. 22 is a longitudinal sectional view showing a second modification of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B of the vehicle lamp and the vehicle lamp 100A, 100B according to the present invention.

The excitation light control member 1C (2C, 3C) has a reflection member 40 and a shielding member 41, and the excitation light control member 1C (2C, 3C) of the modification 1 has a lens member 45. , and a shielding member 410. On the other hand, the excitation light control member 1C (2C, 3C) of Modification 2 includes a reflection member 40, a shielding member 410, and a lens member 45. The reflecting member 40 reflects the excitation light L11 (L12, L13) toward the entrance surface 450 of the lens member 45.

The excitation light control member 1C (2C, 3C) of Modification 2 has the same effect as the excitation light control member 1C (2C, 3C) and the excitation light control member 1C (2C, 3C) of Modification 1. effect can be achieved.

(Description of modification 3 of excitation light control member)
FIG. 23 is a longitudinal sectional view showing a third modification of the excitation light control member 1C (2C, 3C) of the light emitting device 1A, 1B of the vehicle lamp and the vehicle lamp 100A, 100B according to the present invention.

The excitation light control member 1C (2C, 3C) has a reflection member 40 and a shielding member 41, and the excitation light control member 1C (2C, 3C) of the modification 1 has a lens member 45. , 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. On the other hand, the excitation light control member 1C (2C, 3C) of Modification 3 includes a light guide member 46 having an entrance surface 460 and an exit surface 461, and a shielding member 410. The light guide member 46 allows the excitation light L11 (L12, L13) to enter from the entrance surface 460, guide it to the exit surface 461, and output the excitation light L11 (L12, L13) from the exit surface 461 to the opening 413 of the shielding member 410. The opening 413 of the shielding member 410 irradiates the excitation light L11 (L12, L13) emitted from the output surface 461 of the light guide member 46 onto the light emitting panels 1P, 10P (2P, 20P, 3P30P) with a predetermined light distribution DL. do.

The excitation light control member 1C (2C, 3C) of this modification 3 is the excitation light control member 1C (2C, 3C), the excitation light control member 1C (2C, 3C) of the modification 1, and the modification The same effects as the excitation light control member 1C (2C, 3C) of Example 2 can be achieved.

(Explanation of examples other than Embodiments 1 and 2 and Modifications 1, 2, and 3)
In Embodiments 1 and 2 and Modifications 1, 2, and 3, an example will be described in which the vehicle lamps 100A and 100B are tail lamps forming a rear combination lamp, and the secondary light L2 is red light. It is something to do. However, in the present invention, the vehicle lamps 100A and 100B may be stop lamps other than tail lamps, tail stop lamps, or turn signal lamps. In the case of a stop lamp or a 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.

Moreover, in the above-mentioned Embodiments 1 and 2 and Modifications 1, 2, and 3, the excitation light control members 1C, 2C, and 3C have a reflecting member 40 and a shielding member 41, and a lens member 45 and a shielding member 410. one having a reflecting member 40, a shielding member 410, and a lens member 45, and one having a light guiding member 46 and a shielding member 410. However, in the present invention, the reflecting member 40, the shielding members 41, 410, the lens member 45, and the light guiding member 46 may be arbitrarily combined or may be used alone.

Furthermore, in the first and second embodiments and the first, second and third modified examples, 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 may be used in the light emitting unit. Moreover, by using a large number of them, detailed and diverse sequential light emission, segment light emission, communication light emission, etc. can be obtained.

Furthermore, in Embodiments 1 and 2 and Modifications 1, 2, and 3, in the lamp chamber 104, the lamp housing 100, the second light emitting panel 2P of the second light emitting unit 2U of the light emitting device 1A, and the excitation light filter A reflector 103 is disposed between the second filter section 12F on the 1F, and the reflector 103 directs the 2nd-secondary light L22 from the second light emitting unit 2U to the outside of the light chamber 104, that is, to the light chamber. The light is transmitted through the lamp lens 101 from inside the lamp chamber 104 and reflected to the outside of the lamp chamber 104. However, in this invention, the reflector that reflects the secondary lights L21, L22, L23 from the light emitting devices 1A, 1B to the light emitting panels 1P, 2P, 3P, 10P, 20P, 30P side of the light emitting devices 1A, 1B, It may be placed inside the lamp room 104. Further, both this reflector and the reflector 103 described above may be arranged.

Note that the present invention is not limited to the first to fifth embodiments described above.

1A, 1B Light emitting device 1U, 2U, 3U Light emitting unit 1U First light emitting unit 2U Second light emitting unit 3U Third light emitting unit 1F Excitation light filter 11F First filter section 12F Second filter section 13F Third filter section 14F First connection Part 15F Second connecting part 1C, 2C, 3C Excitation light control member 1C First excitation light control member 2C Second excitation light control member 3C Third excitation light control member 40 Reflection member 41, 410 Shielding member 411 First opening 412 Second opening 413 Opening 1L, 2L, 3L Excitation light source 1L First excitation light source 2L Second excitation light source 3L Third excitation light source 42 Substrate 43 Light emitting element 45 Lens member 450 Incident surface 451 Output surface 46 Light guide member 460 Incident surface 461 Output surface 1P, 2P, 3P, 10P, 20P, 30P Light emitting panel 1P, 10P 1st light emitting panel 2P, 20P 2nd light emitting panel 3P, 30P 3rd light emitting panel 500 Substrate 510 Light emitting film (light emitting layer, OPL)
520 Secondary light exit surface 530 Reflective film (reflective layer)
540 Reflective surface 550 Sealing material 560 Sealing material 570 Binder material 580 Inorganic phosphor particles 100A, 100B Vehicle lamp 100 Lamp housing 101 Lamp lens (outer lens)
102 Inner panel 103 Reflector 104 Light chamber 105 Bracket B Rear D Bottom DL Light distribution E Eye F Front L Left L11, L12, L13 Excitation light L11 First excitation light L12 Second excitation light L13 Third excitation light L21, L22, L23 Secondary light L21 1st-2nd light L22 2nd-2nd light L23 3rd-2nd light L31, L32, L33 Stray excitation light L41, L42, L43, L44, L45, L46, L47, L48 Outside light R Right U Up Z Reference axis

Claims (9)

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 includes 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 are arranged at least one each on 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, characterized by the following. The light-emitting panels of the plurality of light-emitting units each include a light conversion film formed on one surface or the other surface of the excitation light filter, and excited by the excitation light and emitting the secondary light to emit light. has a luminescent film as
The light emitting film is formed in an arbitrary shape,
The light emitting device for a vehicle lamp according to claim 1. The excitation light from the excitation light sources of the plurality of light emitting units is controlled respectively so that the excitation light from the excitation light source of one of the light emitting units is used as stray excitation light to stimulate the excitation light of the other light emitting units. comprising an excitation light control member that prevents the excitation light from straying into the light emitting panel and entering the light emitting panel;
The light emitting device for a vehicle lamp according to claim 1. 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 on at least one of an entrance surface and an exit surface;
a light guiding member that guides the excitation light incident from the incident surface to an output surface and outputs the excitation light to the outside from the output surface;
a shielding member that shields the stray excitation light;
having at least one member of
4. The light emitting device for a vehicle lamp according to claim 3. Of the excitation light, the excitation light filter does not transmit the excitation light having a wavelength in a range of at least about 300 nm to about 500 nm, and transmits at least about 500 nm to about 500 nm of the secondary light emitted by the light emitting panel. A transparent plate that transmits the secondary light having a wavelength in the range of up to 780 nm with a transmittance of about 90% or more,
The light emitting device for a vehicle lamp according to claim 1. A light chamber forming member forming a light 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: a reflector that is disposed within the lamp chamber and reflects secondary light from the light emitting device to the outside of the lamp chamber; or a reflector that reflects excitation light from the light emitting device toward a light emitting panel of the light emitting device; a reflector of at least one of the above;
The vehicular lamp according to claim 6, characterized in that: 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 vehicular lamp according to claim 6, characterized in that: 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.
The vehicular lamp according to claim 8, characterized in that:

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