KR20180072417A - Automotive lamp - Google Patents

Abstract

The present invention relates to a lamp for a vehicle. That is, the present invention relates to the lamp for a vehicle, increasing a vehicle exterior design using a simple structure. According to one embodiment of the present invention, the lamp for a vehicle comprises: an excited light source radiating excited light; and a light guide unit converting the excited light incident through an incidence unit into fluorescent light to emit the same to an emission unit. Moreover, the light guide unit has a fluorescent light generator formed in the flow direction of the excited light to convert the same into the fluorescent light.

Description

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lamp for a vehicle, and more particularly to a lamp for a vehicle that improves the appearance of a vehicle through a simple structure.

2. Description of the Related Art [0002] Generally, a vehicle is equipped with various types of vehicle lamps having a lighting function for easily identifying an object located in the vicinity of the vehicle at nighttime, and a signal function for notifying other vehicles or road users of the running state of the vehicle.

For example, head lamps and fog lamps are mainly aimed at lighting functions, while turn signal lamps, tail lamps, brake lamps, side markers and the like are mainly used for signal functions. In addition, such vehicle lamps are prescribed by laws and regulations on installation standards and specifications so that each function can be fully utilized.

In recent years, studies have been made on the use of light generated by using a light emitting diode or a laser diode as a light source of a vehicle lamp and exciting a phosphor by using an excitation light source as the light generated from the light source Is actively proceeding.

At this time, laser light generated from the laser diode can be condensed easily without loss of light due to high luminance and strong directivity, so that a high-brightness and bright light can be obtained as compared with a light-emitting diode.

Such a vehicle lamp is merely a means for illuminating a light or a means for signaling an external signal. However, in recent years, the proportion of vehicle lamps has increased in terms of versatility.

In other words, not only the functional aspects that help the safe operation through securing the view of the driver, which is the basic role of the vehicle lamp, but also the aesthetic aspect of the consumers through the design improvement have a great influence on whether or not to purchase the vehicle. Particularly, in the case of a head lamp or a tail lamp, it becomes an important factor for determining the appearance of the vehicle at night.

Accordingly, there is a need for a method for enhancing appearance design by providing a visual pattern that is improved in design, rather than just implementing a static image through simple lighting of a light source.

Japanese Patent Application Laid-Open No. 10-2013-0081352 (July 17, 2013)

SUMMARY OF THE INVENTION The present invention provides a vehicle lamp in which an optic coated with a phosphor is formed along a long axis of a long light guide in one direction and a laser beam is transmitted through the end of the light guide.

The objects of the present invention are not limited to the above-mentioned problems, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

The vehicle lamp according to the embodiment of the present invention includes an excitation light source for emitting excitation light and a light guide unit for converting the excitation light incident through the incidence unit into fluorescence and outputting the light to an emission unit, And a fluorescence generator formed on the excitation light to convert the excitation light into the fluorescence.

The details of other embodiments are included in the detailed description and drawings.

According to the vehicle lamp of the present invention as described above, the optic coated with the phosphor is formed along the long axis of the long light guide in one direction so that the laser light emitted from the laser diode is transmitted through the end of the light guide So that a uniform light pattern can be formed by the light guide.

The effects of the present invention are not limited to the effects mentioned above, and other effects not mentioned can be clearly understood by those skilled in the art from the description of the claims.

1 is a perspective view of a vehicle lamp according to an embodiment of the present invention.
2 is a plan view of a vehicle lamp according to an embodiment of the present invention.
FIG. 3 is a view showing that the excitation light according to the embodiment of the present invention is transmitted through the light guide portion. FIG.
4 is a view illustrating optical processing by the light guide unit according to the embodiment of the present invention.
FIG. 5 is a view showing that fluorescence is emitted by a vehicle lamp according to an embodiment of the present invention.
6 is a cross-sectional view of a light guide portion according to another embodiment of the present invention.
Figs. 7 and 8 are diagrams showing optical processing by the light guide portion of Fig. 6. Fig.
9 is a view illustrating a condenser lens according to another embodiment of the present invention.
10 is a view showing an excitation light transmission pattern by the condenser lens of FIG.
11 is a view showing a condenser lens according to another embodiment of the present invention.
12 is a diagram showing an excitation light transmission pattern by the condenser lens of FIG.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention, and the manner of achieving them, will be apparent from and elucidated with reference to the embodiments described hereinafter in conjunction with the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

Thus, in some embodiments, well known process steps, well-known structures, and well-known techniques are not specifically described to avoid an undue interpretation of the present invention.

The terminology used herein is for the purpose of illustrating embodiments and is not intended to be limiting of the present invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is to be understood that the terms comprise and / or comprise are used in a generic sense to refer to the presence or addition of one or more other elements, steps, operations and / or elements other than the stated elements, steps, operations and / It is used not to exclude. And "and / or" include each and any combination of one or more of the mentioned items.

Further, the embodiments described herein will be described with reference to cross-sectional views and / or schematic drawings that are ideal illustrations of the present invention. Thus, the shape of the illustrations may be modified by manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention are not limited to the specific forms shown, but also include changes in the shapes that are generated according to the manufacturing process. In addition, in the drawings of the present invention, each component may be somewhat enlarged or reduced in view of convenience of explanation. Like reference numerals refer to like elements throughout the specification.

Hereinafter, the present invention will be described with reference to the drawings for explaining a vehicle lamp according to embodiments of the present invention.

FIG. 1 is a perspective view of a vehicle lamp according to an embodiment of the present invention, and FIG. 2 is a plan view of a vehicle lamp according to an embodiment of the present invention.

1 and 2, the vehicle lamp 10 includes an excitation light source 100, a condensing lens 200, and a light guiding unit 300.

The excitation light source 100 serves to irradiate the excitation light. In the embodiment of the present invention, the excitation light source 100 may be a laser diode that generates laser light as the excitation light. However, the excitation light source 100 is not limited to a laser diode, Diodes, bulbs, and the like can be used.

When a laser diode is used as the excitation light source 100, the excitation light source 100 can generate laser light in a blue region having a peak wavelength in a wavelength range of 440 nm to 490 nm. Hereinafter, the laser light of the blue region is generated by the excitation light source 100, but the light generated by the excitation light source 100 of the present invention is not limited thereto. That is, the color gamut of the laser light can be variously changed according to the hue of the light required by the vehicle lamp 10 or the hue of the fluorescent light to be generated through the fluorescence generating unit described later.

A condenser lens 200 may be provided on the light irradiation path of the excitation light source 100. The condenser lens 200 functions to condense excitation light emitted from the excitation light source 100. As the excitation light is condensed, the light transmitted through the condenser lens 200 can be irradiated at a longer distance in a state in which optical loss is reduced.

The light guide unit 300 converts the excitation light incident through the incident unit 311 into fluorescence and outputs the fluorescence to the emission unit 312. The light guiding unit 300 includes a light guiding body 310 and a fluorescence generating unit 320. 1 illustrates the light-guiding body 310 and the fluorescence generator 320 separated from each other. However, the light-guiding body 310 and the fluorescence generator 320 according to the embodiment of the present invention are not shown in FIG. 1, The unit 320 may be implemented as an integral unit. Accordingly, light can be prevented from being reflected or refracted by the boundary between the light-guiding body 310 and the fluorescence generator 320.

The excitation light of the excitation light source 100 may be incident into the light guide body 310 through the incidence portion 311 of the light guide body 310 and may be emitted to the output portion 312. For this purpose, the light guide body 310 may be formed of a transparent or semi-transparent light guide.

The light guiding body 310 may form a predetermined image of a predetermined type using the incident light. As the excitation light of the excitation light source 100 is transmitted through the light guide body 310, it can be recognized that light is emitted in the form of the light guide unit 300 to an observer viewing the excitation light.

1 and 2 show a light guide body 310 having a cylindrical shape. The incident portion 311 corresponds to one plane of the cylinder and the emitting portion 312 can correspond to the circumferential surface of the cylinder. As the light guide body 310 has a cylindrical shape, a long rod-shaped light image can be observed by an observer looking at the light guide body 310. However, the shape of the light guide body 310 of the present invention is not limited to the cylinder, and the shape of the light guide body 310 may be variously determined depending on the use of the vehicle lamp 10. [

The fluorescence generator 320 is formed along the traveling direction of the excitation light to convert the excitation light into fluorescence. The fluorescence generator 320 can be excited by excitation light to generate fluorescence. The fluorescence generator 320 includes an inclined portion 321 and a phosphor 322.

The inclined portion 321 may be inclined with respect to the traveling direction of the excitation light. 2 shows that a plurality of inclined portions 321 are provided in the fluorescence generating portion 320 with respect to the traveling direction of the excitation light. The fluorescence generating portion 320 may include a plurality of inclined surfaces having a saw-tooth shape. As shown in FIG. 2, an inclined surface formed toward a similar one of the plurality of inclined surfaces may be the inclined portion 321 of the present invention.

The inclination angles of each of the plurality of inclined portions 321 with respect to the advancing direction of the excitation light may be all the same, some different, or all different. The angle of inclination of each of the plurality of inclined portions 321 with respect to the traveling direction of the excitation light may be variously determined in order to form various images by fluorescence emitted through the emitting portion 312.

The phosphor 322 is formed on the inclined portion 321 and serves to convert excitation light into fluorescence.

The phosphor 322 can determine the color of the fluorescence generated according to the use of the lamp 10 for a vehicle. When the vehicle lamp 10 is a headlamp, generally white light should be generated. Accordingly, when laser light in the blue region is irradiated from the excitation light source 100, the phosphor 322 may be a yellow phosphor. In this case, the phosphor 322 can generate white light having a peak wavelength in the wavelength range of 560 nm to 590 nm.

In this case, in the embodiment of the present invention, when the blue laser light is irradiated by the excitation light source 100, the yellow phosphor is used as the fluorescence generating part 320 is merely an example for facilitating understanding of the present invention. The fluorescence generator 320 of the present invention is not limited thereto and may be realized by a combination of blue, green, and red phosphors according to the color gamut of the excitation light source 100.

In addition, in the embodiment of the present invention, the fluorescent material 322 included in the fluorescent material 320 may be a reflective fluorescent material. The reflection type phosphor can be understood as a phosphor 322 that generates fluorescence while reflecting excitation light incident thereon when excitation light is incident thereon.

The vehicle lamp 10 according to the embodiment of the present invention can be provided inside a housing of a lamp which forms a unique light pattern such as a headlight, a fog light, a tail light, a brake light, a turn signal light, a position light or a daytime running light. Specifically, the excitation light source 100 and the light guide unit 300 may be provided inside a housing such as a headlight, a fog light, a tail light, a brake, a turn signal lamp, a position light, or a daytime running.

The vehicle equipped with the vehicle lamp 10 of the present invention can form a separate light pattern adjacent to the above-described light patterns. Thus, the observer can simultaneously observe the light pattern by the above-described angle and the like and the light pattern by the lamp 10 for a vehicle of the present invention.

Hereinafter, the function of the vehicle lamp 10 according to the embodiment of the present invention will be described in detail.

FIG. 3 is a view showing that the excitation light according to the embodiment of the present invention is transmitted through the light guide portion. FIG.

Referring to FIG. 3, the excitation light L emitted from the excitation light source 100 can pass through the light guiding unit 300.

The excitation light L incident on the light guide unit 300 can be scattered in the light guide unit 300 to form scattered light L_S. The excitation light L is incident through the incident portion 311 of the light guiding portion 300 and exits through one surface (hereinafter referred to as a projection portion) 313 opposite to the incident portion 311. The excitation light L The scattered light L_S is scattered in the light guide 300 and the remaining excitation light L_P can be projected through the projection unit 313.

The light guiding unit 300 can visually output the optical path of the excitation light L condensed by the condenser lens 200. [ The light path can be observed while the scattered light L_S is generated along the movement path of the excitation light L. [

A medium for causing scattering of the excitation light L may be provided on the optical path of the excitation light L for the formation of the scattered light L_S. The medium may be provided, for example, throughout the interior of the light guide body 310. The excitation light L is converted into the scattered light L_S by the medium and can be recognized from the outside.

As the material of the medium, glass, polycarbonate, polymethyl metacrylate or acrylic may be used, but the material of the medium of the present invention is not limited thereto, ) Scattering can be generated. Further, the material of the medium is not limited to solid, but may be provided in the form of gas or liquid.

As described above, the excitation light L according to the embodiment of the present invention may be laser light. Thus, the excitation light L may not have a relatively large loss of energy even though it transmits the long light-guiding portion 300. That is, the difference between the excitation light L incident through the incident portion 311 and the excitation light L_P projected through the projection portion 313 may not be large, and the light output portion 312 of the light guide portion 300 A certain type of optical image can be formed.

4 is a view illustrating optical processing by the light guide unit according to the embodiment of the present invention.

Referring to FIG. 4, the scattered light L_S may be reflected by the light guide body 310 and the fluorescent light L_F may be transmitted through the light guide body 310.

The scattered light L_S represents the light generated by being branched from the excitation light L. That is, the property of the scattered light L_S and the property of the excitation light L may be the same or similar. As described above, the excitation light L may be blue laser light, and damage may occur when it is directly irradiated to the human body of the surrounding person. Therefore, it may be undesirable that the excitation light L is emitted directly through the output portion 312.

Accordingly, the emitting unit 312 according to the embodiment of the present invention can reflect light in the wavelength range including the excitation light L. For example, the emission part 312 can reflect light in a wavelength range of 440 nm to 490 nm. The scattered light L_S generated inside the light guide body 310 is not emitted through the output unit 312 as the output unit 312 reflects the light in the wavelength range including the excitation light L, So that the light can be reflected while being continuously reflected inside the light guiding body 310.

Further, the emitting unit 312 can transmit light in a wavelength range including fluorescence L_F. As shown in the figure, the scattered light L_S can be reflected by the emitting part 312 and proceed to the phosphor 322. [ The scattered light L_S entering the phosphor 322 can be converted into the fluorescence L_F and the fluorescence L_F can be emitted through the emitting unit 312.

Thus, the emitting unit 312 can reflect light in the wavelength range including the excitation light L, and transmit light in the wavelength range including the fluorescence L_F. For example, the emitting portion 312 may be a dichroic mirror, but the emitting portion 312 of the present invention is not limited thereto. For example, the emission unit 312 can transmit not only light in a wavelength range including fluorescence L_F but also light in a wavelength range including scattered light L_S. In this case, not only the fluorescence L_F formed by the phosphor 322 but also the optical path of the excitation light L formed by the scattered light L_S can be observed at the same time.

Hereinafter, only the fluorescence L_F will be emitted through the emitting unit 312.

FIG. 5 is a view showing that fluorescence is emitted by a vehicle lamp according to an embodiment of the present invention.

5, fluorescence L_F may be emitted by the light guide unit 300 as the excitation light L is incident on the light guide unit 300 by the excitation light source 100. FIG.

The excitation light L incident on the light guiding unit 300 is scattered to generate scattered light L_S and scattered light L_S can form an optical path of the excited light L. [ The scattered light L_S can be converted into the fluorescence L_F by the fluorescence generating unit 320 and the fluorescence L_F can be emitted through the output unit 312 of the light guide unit 300.

A plurality of inclined portions 321 are provided along the long axis of the light guiding portion 300 and the fluorescent material 322 is formed in each of the inclined portions 321. In the incident portion 311 of the light guiding portion 300, And the generated scattered light L_S can be converted into fluorescence L_F by the fluorescent material 322 of each slanted part 321 have.

As the fluorescence L_F is emitted through the emitting unit 312, the observer looking at the fluorescent light L_F can observe the light image corresponding to the shape of the emitting unit 312.

FIG. 6 is a cross-sectional view of a light guide according to another embodiment of the present invention, and FIGS. 7 and 8 are views showing light processing by the light guide of FIG.

6, the light guide unit 300 may include a reflection unit 330 provided on the opposite side of the incident unit 311 and reflecting the excitation light L incident through the incident unit 311. [

The reflector 330 may reflect the light in the wavelength range including the excitation light L. The reflector 330 may reflect not only the light in the wavelength range including the excitation light L but also the light in the wavelength range including the fluorescence L_F. That is, the reflector 330 can reflect both the light incident to the light guide unit 300 and the light generated inside the light guide unit 300.

The fluorescence generator 320 may include an inclined portion 321, an inverted portion 323, and phosphors 322 and 324. Since the inclined portion 321 has been described above, a detailed description thereof will be omitted.

The reverse scintillating portion 323 may be formed obliquely with respect to the traveling direction of the reflected light reflected by the reflecting portion 330. The fluorescent light generating unit 320 has a plurality of inclined surfaces having a sawtooth shape. The inclined surface formed toward the other one direction different from the inclined portion 321 corresponds to the reverse-facing unit 323. Thus, the inclined portion 321 and the inverted portion 323 can be repeatedly formed along the long axis of the fluorescence generating portion 320.

The phosphor 324 may be formed on the inverted-sloped portion 323 as well as the sloped portion 321. The phosphor 324 serves to convert the reflected light reflected by the reflector 330 into fluorescence L_F.

7, the scattered light L_S by the excitation light L can be converted into the fluorescent light L_F by the fluorescent material 322 of the inclined portion 321.

The fluorescence L_F converted by the phosphor 322 of the inclined portion 321 can be emitted through the emitting portion 312.

8, the excitation light L is reflected by the reflection part 330 and the scattered light RL_S by the reflected light RL is reflected by the fluorescent material 324 of the reverse-side mirror part 323 by the fluorescence RL_F ). ≪ / RTI >

The fluorescence RL_F converted by the fluorescent material 324 of the reverse sclera 323 can be emitted through the emitting unit 312. [

Since the fluorescence L_F and RL_F are formed not only by the excitation light L incident through the incident portion 311 but also by the reflected light RL reflected by the reflection portion 330, It is possible to improve the optical density of the fluorescence L_F and RL_F,

Hereinabove, all of the excitation light L irradiated from the excitation light source 100 is condensed by the condensing lens 200 and is incident on the light guiding unit 300. The condensing lens according to another embodiment of the present invention can condense a part of the excitation light L irradiated from the excitation light source 100 and transmit the remaining part of the excitation light L as it is.

Hereinafter, the condenser lens according to another embodiment of the present invention will be described in detail with reference to FIG. 9 through FIG.

FIG. 9 is a view showing a condenser lens according to another embodiment of the present invention, and FIG. 10 is a diagram showing an excitation light transmission pattern by the condenser lens in FIG.

Referring to FIG. 9, the condenser lens 201 includes a lens panel 210 and a condenser 220.

The lens panel 210 serves to support the light collecting part 220. The lens panel 210 may be used to fix the condenser lens 201 to a housing (not shown) provided with the lamp 10 for a vehicle. The light collecting part 220 is attached to the lens panel 210 so that its position can be fixed.

The lens panel 210 can transmit the light without changing any of the light. For this, the lens panel 210 may have a relatively high transmittance.

The light collecting unit 220 is attached to one side of the lens panel 210 and collects incident light. Meanwhile, the light collecting part 220 of the condensing lens 201 according to another embodiment of the present invention may be disposed on one side of the lens panel 210. For example, the light collecting unit 220 may be provided only on one side of the center line C dividing the entire area of the light collecting lens 201 to which the light collecting unit 220 is attached.

The excitation light L incident on the region where the light collecting unit 220 is disposed among the excitation light L incident on the condensing lens 201 is condensed by the condensing unit 220 but condensed by the condensing unit 220 The excitation light L incident on the un-arranged region can be incident on the light guiding portion 300 without being condensed.

10, a part (L1) of the excitation light L irradiated by the excitation light source 100 is condensed and irradiated by the condensing part 220, and the remaining part L2 is condensed .

As described above, the excitation light L of the present invention can be laser light. The laser beam has a relatively large directivity, and the directivity increases when condensed.

When the directivity of the excitation light L is excessively large, the scattering ratio within the light guide portion 300 is small, and much of the light can pass through the light guide portion 300 as it is. The condenser lens 201 may include a region where the light collecting unit 220 is disposed and an area where the light collecting unit 220 is not disposed. The excitation light L2 which has not been transmitted through the light collecting portion 220 among the excitation light L irradiated by the excitation light source 100 is incident on the light guiding portion 300 and is scattered inside the light guiding portion 300 Sufficient scattered light L2_S can be formed.

The excitation light L1 transmitted through the light collecting part 220 is also partially scattered in the light guide 300 to form scattered light so that the light path of the excitation light L1 can be observed from the outside. The remaining excitation light L1_P that is not scattered in the light guide unit 300 among the excitation lights L1 can be transmitted through the light guide unit 300. [ Thus, all of the excitation lights L1_P and L2_P transmitted through the light guiding unit 300 can be incident on another light guiding unit (not shown) and used for forming an optical image or for other purposes of a vehicle (not shown).

FIG. 11 is a view showing a condenser lens according to another embodiment of the present invention, and FIG. 12 is a diagram showing an excitation light transmission pattern by the condenser lens of FIG.

Referring to FIG. 11, the condenser lens 202 includes a lens panel 230 and a condenser 240.

The lens panel 230 supports the light collecting part 240 and can transmit the incident light without changing it.

The light collecting part 240 is attached to one side of the lens panel 230 and collects incident light. The light collecting part 240 may be provided along a center line C dividing the entire area of the condenser lens 202 in two.

The excitation light L1 incident on the region where the light collecting portion 240 is disposed among the excitation light L incident on the condensing lens 202 is condensed by the condensing portion 240 but condensed by the condensing portion 240 The excitation light L2 incident on the non-arranged region can be incident on the light guiding portion 300 without being condensed.

12, a part (L1) of the excitation light L irradiated by the excitation light source 100 is condensed and irradiated by the condensing part 240, and the remaining part L2 is irradiated .

The excitation light L2 which is not transmitted through the light collecting portion 240 among the excitation light L irradiated by the excitation light source 100 is incident on the light guiding portion 300 and is scattered inside the light guiding portion 300, Light L2_S can be formed.

On the other hand, the excitation light L 1 transmitted through the light collecting part 240 is also partially scattered in the light guide part 300 to form scattered light, so that the light path of the excitation light L 1 can be observed from the outside. The remaining excitation light L1_P that is not scattered in the light guide unit 300 among the excitation lights L1 can be transmitted through the light guide unit 300. [ Thus, all of the excitation lights L1_P and L2_P transmitted through the light guiding unit 300 can be incident on another light guiding unit (not shown) and used for forming an optical image or for other purposes of a vehicle (not shown).

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It will be understood. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: Vehicle lamp
100: Light source here
200, 201, 202: condensing lens
210, and 230: a lens panel
220, 240: Concentrator
300: light-
310: light-guiding body
311:
312:
313:
320:
321:
322, 324: Phosphor
323: The adversary
330:

Claims (13)

An excitation light source for irradiating excitation light; And
And a light guiding part for converting the excitation light incident through the incidence part into fluorescence and emitting the excitation light to an emission part,
And the light guiding portion includes a fluorescence generating portion formed along the traveling direction of the excitation light to convert the excitation light into the fluorescence. The method according to claim 1,
The fluorescent-
An inclined portion inclined with respect to a traveling direction of the excitation light; And
And a phosphor formed on the inclined portion and converting the excitation light into the fluorescent light. 3. The method of claim 2,
The excitation light is scattered in the light guide portion to form scattered light,
And the phosphor converts the scattered light into the fluorescence. The method according to claim 1,
The output unit
Reflects light in a wavelength range including the excitation light,
And transmits light in a wavelength range including the fluorescence. 5. The method of claim 4,
Wherein the exit portion includes a dichroic mirror. The method according to claim 1,
And the light guiding portion includes a reflecting portion provided on the opposite side of the incident portion and reflecting the excitation light incident through the incident portion. The method according to claim 6,
The fluorescent-
An inverted mirror section inclined with respect to a traveling direction of the reflected light reflected by the reflecting section; And
And a phosphor that is formed on the reverse-side mirror and converts the reflected light into the fluorescent light. The method according to claim 1,
And a condenser lens for condensing the excitation light irradiated from the excitation light source. 9. The method of claim 8,
Wherein the condenser lens condenses a part of the excitation light emitted from the excitation light source and transmits the remaining part of the excitation light as it is. 10. The method of claim 9,
And the light guide unit transmits excitation light condensed by the condenser lens. 9. The method of claim 8,
Wherein the light guide section visually outputs the optical path of the excitation light condensed by the condenser lens. 12. The method of claim 11,
And a medium for scattering the condensed excitation light is provided on the optical path. The method according to claim 1,
Wherein the excitation light source and the light guide unit are provided inside a headlamp, a fog light, a tail light, a brake, a turn signal lamp, a position light or a daytime running of a vehicle.

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