KR20170062851A - Lamp for vehicle - Google Patents

Abstract

The present invention relates to a phosphor, a phosphor for generating excitation light excited by laser light emitted from the laser light source and having a specific color, a plurality of LED light sources, a substrate on which the plurality of LED light sources are arranged together on the same plane, A reflector for reflecting the excitation light generated from the phosphor and the light emitted from the plurality of LEDs toward the front of the vehicle, and a projection lens for projecting the light reflected by the reflector to the front of the vehicle .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle lamp, and more particularly, to a vehicle lamp using a light emitting diode (LED) and a laser light on one substrate.

BACKGROUND ART [0002] Recently, a technique of applying an LED (light emitting diode) to a light source as a headlamp for a vehicle has been disclosed.

However, since the LED is low in luminance compared with other types of light sources such as a laser light and a HID lamp (high-intensity discharge lamp), a cut-off that illuminates a long distance from the light distribution pattern is used, It is weak in terms of ensuring sufficient distance visibility due to lack of illumination near the line.

On the other hand, in the case of laser light, a lighting apparatus using fluorescence generated by irradiating a phosphor with laser light emitted from a laser light source is used as illumination light.

The coherent laser beam has a high linearity, which is advantageous in securing the visibility of the distance, but it is weak in securing the wide width.

That is, by applying a laser light source having a high brightness to form a hot zone of a light distribution pattern and forming an LED having a high light amount to form a light distribution pattern around the hot zone, Automotive lamp technology is required.

Japanese Unexamined Patent Application Publication No. 2010-232044 (October 14, 2010)

A problem to be solved by the present invention is to provide a vehicle lamp which forms a hot zone of a light distribution pattern by using a laser light source of high brightness and can make a light distribution pattern of a peripheral portion of the hot zone with LED light of a high light amount .

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a method of manufacturing the same.

According to an aspect of the present invention, there is provided a vehicular lamp including a laser light source, a phosphor excited by the laser light emitted from the laser light source to generate excitation light having a specific color, a plurality of LED light sources, And a plurality of LED light sources arranged on the same plane, a reflector for reflecting the excitation light generated from the fluorescent substance and the light emitted from the plurality of LEDs toward the front of the vehicle, and a light source for reflecting the light reflected by the reflector, And may include a projection lens for projecting forward.

And may be arranged adjacent to and adjacent to the phosphor.

The fluorescent material may be a reflective fluorescent material.

The plurality of LED light sources may be arranged symmetrically with respect to the phosphor.

The light distribution pattern formed by the laser light may be located at the center of the light distribution pattern formed by the LED light source.

The height of the light emitting surface of each LED light source and the top surface of the phosphor may be the same.

And a shade member extending in parallel with the substrate and shielding a part of light reflected by the reflector and incident on the projection lens.

The laser light source is disposed on the opposite side of the reflection surface formed on the reflector, and the reflector has a through hole passing through the reflector so that the laser light emitted from the laser light source enters the phosphor through the through- .

And a reflection member for reflecting the laser beam before the laser beam emitted from the laser beam source passes through the through hole.

One end of each LED light source and one end of the phosphor may be on the same extension line.

The center of each LED light source and the center of the phosphor may be located on the same extension line.

And a reflective member between the phosphor and the substrate.

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

The embodiments of the present invention have at least the following effects.

That is, the vehicle lamp according to the embodiments of the present invention forms a hot zone of a light distribution pattern using a high-brightness laser light source, and makes LED light having a high light amount to form a light distribution pattern around the hot zone, You can take everything.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a front view of a vehicle to which a vehicle lamp according to an embodiment of the present invention is applied.
2 is a longitudinal sectional view of a vehicle lamp according to an embodiment of the present invention.
3 is a cross-sectional view of a vehicle lamp according to an embodiment of the present invention.
4 is a plan view showing a phosphor and an LED light source arranged on a substrate of a lamp for a vehicle according to an embodiment of the present invention.
5 is a front view of Fig.
6 is a longitudinal sectional view of a vehicle lamp according to another embodiment of the present invention.
7 shows a light distribution pattern by an LED light source of a vehicle lamp according to an embodiment of the present invention.
8 shows a state in which a light distribution pattern is added by a laser light source of a vehicle lamp according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to 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.

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.

1 is a front view of a vehicle to which a vehicle lamp according to an embodiment of the present invention is applied. Referring to FIG. 1, the vehicle lamp of the present embodiment is shown as a head lamp 10, but this is merely an example, and the tail lamp, the brake lamp, the backup lamp, the turn signal lamp, the fog lamp, Lamps, and the like, and the color gamut of laser light generated according to the color required for each lamp can be changed.

2 is a longitudinal sectional view of a vehicle lamp according to an embodiment of the present invention,

3 is a cross-sectional view of a vehicle lamp according to an embodiment of the present invention.

2 and 3, a vehicle lamp according to an embodiment of the present invention includes a laser light source 110, a phosphor 120, a plurality of LED light sources 130, a substrate 140, a reflector 150, Lens 160 may be included.

The laser light source 110 may be a high power semiconductor laser light source including a light emitting element (not shown) and a collimator lens (not shown). The laser light source 110 emits a laser beam corresponding to the size of the light emitting portion at a predetermined angle, rather than the light emitting portion of the light emitting element. The laser light emitted from the light emitting element is incident on the collimator lens, and may be incident on the phosphor 120 described later. The phosphor 120 to be described later may be a phosphor for a laser light source having a size equal to or greater than the irradiation range of the laser light. Thus, the range of the excitation light excited from the phosphor 120 is narrow and long, and light emission with high brightness on the light emitting portion can be obtained.

The laser light source 110 has a blue (440 nm) size, a light emitting portion size of 10 μm and a length of 2 μm, a directivity characteristic of 30 ° in the transverse direction and 60 ° in the longitudinal direction and a luminance distribution of a Gaussian distribution .

The laser light emitted from the laser light source 110 can be irradiated toward the phosphor 120. The phosphor 120 can use yellow light YAG and can emit white light by the generated blue laser light. Since the laser light reaching the phosphor 120 is scattered, the luminescence obtained from the phosphor 120 is changed to the Lambertian distribution, and the uniformity can be improved more than the luminance distribution at the time of generation of the initial laser light.

In addition, the laser light source 110 may generate laser light in various colors. For example, the laser light source 110 may generate laser light in a blue region having a peak wavelength in a wavelength range of 440 nm to 490 nm, The present invention is not limited to this, and it is possible to generate laser light in various color regions according to wavelengths.

In the case where the laser light source 110 is used as blue light, a YAG fluorescent material that develops a yellow color can be applied. When ultraviolet light is used as excitation light, a BAM fluorescent material that emits blue light, a? -SiAION fluorescent material that emits green light, A lamp that emits white light by using a CASN phosphor that emits light, and the like.

That is, the phosphor 120 can be coated with a YAG fluorescent material, and is excited by receiving a blue laser beam having a directivity characteristic of a Gaussian distribution emitted from the laser light source 110, and is excited to have a lambertian distribution characteristic White light can be emitted.

In the present embodiment, the color gamut of the laser beam emitted from the laser light source 110 is changed according to the color of light required for the vehicle lamp 10. However, the present invention is not limited to this, The color gamut of the laser light generated from the laser light source 110 and the color gamut of light required by the vehicle lamp 10 may be different from each other when the phosphor includes a phosphor excited by the laser light to generate light of a desired color gamut.

The phosphor 120 is excited by the laser light generated from the laser light source 110 to generate excitation light L1 to L5 of a predetermined color. In this embodiment, in general, The color of the laser light source 110 and the color of the light emitted from the phosphor 120 may be changed according to the color of light required according to the use of the lamp 10 for the vehicle, Can be variously changed.

The phosphor 120 may have different wavelengths of the excitation light generated by excitation by the laser light depending on the hue of the laser light. For example, as described above, when the vehicle lamp 10 of the present invention requires white light and the wavelength of the laser light generated from the laser light source 110 is blue laser light having a peak wavelength in the wavelength range of 440 nm to 490 nm In order to generate white light from the phosphor 120, the phosphor may be composed of a yellow phosphor having a peak wavelength in the range of 560 nm to 590 nm.

Therefore, in this embodiment, the case where the laser light source 110 generates blue laser light and the yellow phosphor is used as the phosphor 120 is not limited thereto, but the phosphor 120 may be a blue, Red, and the like.

In addition, the phosphor 120 may be a transmissive phosphor that is excited by the excitation light generated by excitation by the laser light and propagates through the excitation light, or a reflective phosphor that reflects and propagates. For example, the transmissive phosphor absorbs the laser light, And the reflection type phosphor may be formed by forming a reflection surface on one side of the fluorescent material 120 so that the excitation light generated from the fluorescent material 120 can be reflected and traveled.

The phosphor 120 is excited by laser light and excited by the excitation light emitted from the reflector 150. The phosphor 120 is excited by the laser light, The light emitting surface of the phosphor may be formed on the opposite side of the surface facing the laser light when the transmissive phosphor is used.

When the excitation light generated by the excitation of the phosphor 120 is reflected by the reflector 150 and is incident on the projection lens 160, a part of the excitation light is blocked by the end of the shade member 170, cut-off pattern (downward light) is described as an example, the shade member 170 may be omitted when the cut-off pattern is not required.

The phosphor 120 is excited by a laser beam to generate light of a desired color. In the present embodiment, a case where white light is generally generated for use as the lamp 10 for a vehicle will be described. However, The color of the excitation light generated from the phosphor 120 may be variously changed depending on the use of the lamp 10 for a vehicle.

For example, when the laser light emitted from the laser light source 110 is laser light in a blue region having a peak wavelength in a wavelength range of 440 nm to 490 nm, the phosphor 120 may have a peak in a wavelength range of 560 nm to 590 nm A yellow phosphor having a wavelength may be used.

In this embodiment, the laser light generated from the laser light source 110 is laser light in the blue region, and the yellow fluorescent substance is used as the fluorescent substance 120. However, the fluorescent substance 120 is not limited to the above- And may be a combination of various phosphors such as blue, green, and red phosphors depending on the color of light to be irradiated through the phosphor.

FIG. 4 is a plan view showing a phosphor and a plurality of LED light sources arranged on a substrate of a lamp for a vehicle according to an embodiment of the present invention, and FIG. 5 is a front view of FIG.

As shown in FIGS. 4 and 5, the plurality of LED light sources 130 may be arranged in a line so as to be adjacent to each other around the phosphor 120. At this time, the LED light source 130 and the phosphor 120 may be arranged on the substrate 140. That is, the phosphor 120 may be disposed on the substrate 140 substantially at the center, and may be arranged in a line in both directions so as to be symmetrical with respect to the phosphor 120.

Here, in setting the position where the substrate 140 is disposed, the phosphor 120 formed at the center of the substrate 140 may be a position where the laser light of the laser light source 110 reaches.

The LED light sources 130 may be provided in various numbers depending on the size of the vehicle, but may be composed of at least two even numbers. For example, when four LED light sources 130 are arranged as shown in FIG. 4 and FIG. 5, a laser beam emitted from the laser light source 110 is incident on the center of the light distribution pattern formed by the plurality of LED light sources 130 The light can be excited by the phosphor 120 and irradiated to the central portion of the light distribution pattern.

Referring to FIG. 3 again with reference to FIG. 4, since the positions where the plurality of LED light sources 130 are disposed on the substrate 140 are located at both sides from the rear side focus of the reflector 150, The LED light to be irradiated may be formed with a light distribution pattern spreading widely to both sides around the focus f.

The height of the light emitting surface of each LED light source and the height of the upper surface of the phosphor 120 may be formed so as to coincide with the h-h line as shown in Fig. That is, one end of each LED light source 130 and one end of the phosphor 120 may be located on the same extension line. Accordingly, the light distribution of each LED light source 130 can be made uniform.

In addition, the center of each LED light source 130 may be arranged so as to be located on the same line as the center of the plane of the phosphor 120 so that the light distribution is uniform as described above.

Although not shown in this embodiment, a heat sink may be installed to dissipate heat of the substrate 140. [ Since the plurality of LED light sources 130 and the phosphor 120 that excites the laser light are disposed in one member on the substrate 140, the plurality of LED light sources 130 and the phosphor 120 are radiated as separate heat sinks Since one heat sink can be shared without need, the configuration is simple and the volume can be minimized.

A heat dissipating fin of a material having a high thermal conductivity such as resin or metal die cast (aluminum die cast) is provided on the other surface of one surface of the substrate 140 on which the plurality of LED light sources 130 and the fluorescent material 120 are mounted When the heat sink is provided, heat can be dissipated through heat generated from the plurality of LED light sources 130 and the phosphor 120.

The reflector 150 reflects the excitation light excited by the fluorescent material 120 and reflects the reflected light toward the vicinity of the rear side focus of the projection lens 160. That is, the reflector 150 can perform the function of irradiating the vicinity of the rear side focal point of the projection lens 160 regardless of the point where the excitation light from the phosphor 120 is irradiated.

The LED light of the plurality of LED light sources 130 arranged in parallel with the phosphor 120 can be irradiated via the vicinity of the rear side focus of the projection lens 160 by the reflector 150 have.

To this end, the inner surface of the reflector 150 has an elliptical reflecting surface composed of a free-form surface based on an ellipse, and the front-side focal point of the reflector 150 and the rear-side focal point of the projection lens 160 are the same The shape of the ellipse can be determined within a range in which it is close to the center.

A through hole 151 may be formed in the reflector 150. The through hole 151 forms a hole through which laser light emitted from the laser light source 110 passes and reaches the phosphor 120. The diameter of the through hole 151 can be set within a range that does not interfere with the laser beam, and can be formed at least larger than the diameter of the laser beam.

That is, the through hole 151 may be formed in a circular cross-sectional shape such that the laser light emitted from the laser light source 110 can pass through without interference.

6 is a longitudinal sectional view of a vehicle lamp according to another embodiment of the present invention. 6, the vehicle lamp according to another embodiment of the present invention further includes a reflecting member 180 for reflecting laser light before the laser light emitted from the laser light source 110 passes through the through hole 151 can do.

The configuration in which the reflective member 180 is further included is different from the configuration shown in FIG. 2 and FIG. 3, but the other configurations are the same, and a duplicated description will be omitted.

The reflecting member 180 may be positioned between the phosphor 120 and the substrate 140 and is attached to the inner surface of the lens holder (not shown) and has a function of changing the path of the laser light irradiated from the laser light source 110 Can be performed. Accordingly, the laser light can be irradiated in a direction perpendicular to the light emitting surface of the phosphor 120 by changing the traveling path of the laser light vertically.

In the present embodiment, the case where the path of the laser beam irradiated from the laser light source 110 is irradiated with the phosphor 120 at a predetermined angle is described as an example. However, in order to facilitate understanding of the present invention, The position of the through hole 151 may be adjusted to a corresponding position when the laser light irradiation direction of the laser light source 110 is adjusted to the front side or rear side along the optical axis toward the projection lens 160 . That is, the path of the laser light emitted from the laser light source 110 may be formed vertically by the reflective member 180 as described above.

7 shows a light distribution pattern by an LED light source of a vehicle lamp according to an embodiment of the present invention.

7, the LED light of the LED light source 130 is reflected by the reflector 150 and irradiated onto the projection lens 160 via the focus f, so that the shade member 170 The light distribution pattern P1 of a partially shielded form can be formed by the top surface shape (not shown) of the light distribution pattern P1.

8 shows a state in which a light distribution pattern is added by a laser light source of a vehicle lamp according to an embodiment of the present invention.

Referring to FIG. 8, a laser zone of the laser light source 110 additionally forms a light distribution pattern P2, thereby forming a hot zone. The light distribution pattern P2 of a circular shape centering on the intersection of the horizontal line H-H and the vertical line V-V is added, thereby making it possible to secure the remote visibility of the driver.

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, You will understand. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

10: Vehicle lamp
110: laser light source
120: Phosphor
130: LED light source
140: substrate
150: Reflector
151: Through hole
160: projection lens
170: Shade member
180: reflective member

Claims (12)

A laser light source;
A phosphor excited by laser light emitted from the laser light source to generate excitation light having a specific color;
A plurality of LED light sources;
A substrate on which the phosphor and a plurality of LED light sources are disposed together on the same plane;
A reflector for reflecting the excitation light generated from the phosphor and the light emitted from the plurality of LEDs toward the front of the vehicle; And
And a projection lens for projecting the light reflected by the reflector to the front of the vehicle. The method according to claim 1,
Wherein the phosphor is arranged adjacent to and adjacent to the phosphor. The method according to claim 1,
Wherein the fluorescent material is a reflective fluorescent material. 3. The method of claim 2,
Wherein the plurality of LED light sources are arranged symmetrically with respect to the phosphor. The method according to claim 1,
Wherein a light distribution pattern formed by the laser light is located at a central portion of a light distribution pattern formed by the LED light source. The method according to claim 1,
Wherein a height of a light emitting surface of each of the LED light sources is equal to an upper surface of the phosphor. The method according to claim 1,
And a shade member extending parallel to the substrate and shielding a part of light reflected by the reflector and incident on the projection lens. The method according to claim 1,
Wherein the laser light source is disposed on a side opposite to the reflection surface formed on the reflector, and the reflector has a through hole passing through the reflector so that laser light emitted from the laser light source enters the phosphor through the through- Automotive lamps. 9. The method of claim 8,
And a reflecting member for reflecting the laser light before the laser light emitted from the laser light source passes through the through hole. The method according to claim 1,
Wherein one end of each LED light source and one end of the phosphor are located on the same extension line. The method according to claim 1,
Wherein the center of each LED light source and the center of the phosphor are located on the same extension line. The method according to claim 1,
And a reflective member between the phosphor and the substrate.

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