KR101770635B1 - A headlight for automobile - Google Patents

Abstract

The present invention relates to a headlight device for a vehicle using a laser and a fluorescent substance, capable of radiating light in a long distance while minimizing an energy loss of a beam after converting the beam into white light suitable for a vehicle light by using a point light source property of a laser beam and an optical conversion property of the fluorescent substance and of radiating the light to the front side in superior illumination intensity and linearity than those of an existing light device. According to the present invention, the headlight device for a vehicle using the laser and the fluorescent substance includes: multiple blue laser diodes radiating a blue laser beam to the front side; an installation main body having the multiple blue laser diodes fixed at fixed intervals; an optical fiber bundle unit individually installed in front of the blue laser diode and collecting the laser beams radiated from the blue laser diode in a single light source; a driving main body including an installation groove open to the front side on the front surface of the optical fiber bundle unit and connected to the installation main body; a fluorescent substance unit installed in the installation groove and converting the light source into the white light by receiving the light source radiated by a single light source conversion unit; a white light dispersing unit parabolically installed in the installation groove of the driving main body and radiating the white light converted by the fluorescent substance unit to the front side of the driving main body; and a rotation unit rotating the driving main body in the horizontal direction and the vertical direction.

Description

{A HEADLIGHT FOR AUTOMOBILE} A headlight device using a laser and a phosphor [0001]

The present invention relates to a headlight device for an automobile, and more particularly, to a headlight device for an automobile, and more particularly, to a headlight device for an automobile, and more particularly, to a headlight device for an automobile using a point light source characteristic of a laser beam and a light- And more particularly, to a headlight device for a vehicle using a laser and a phosphor capable of illuminating the front of the vehicle with superior illuminance and linearity.

Problems that headlamps have not yet solved with respect to conventional automotive front lamps include: first, minimization of power consumption; second, efficient use of the total amount of light emitted by the lamp; and third, I can not do that.

The need for long distance headlamps at high speeds at night is being actively developed or commercialized recently in Europe. In the case of advanced automobile manufacturers, the new car is equipped with a laser headlight, but there is room for more efficient lighting performance and low cost considering that the components and assembling of the headlamp are difficult and expensive. have.

Therefore, there is a need to develop a structure that is much more economical and easier to assemble than conventional laser headlamps, which are expensive and difficult to assemble. Particularly, electric vehicles require low power consumption which can be operated by saving the battery capacity as much as possible. Can be very large.

SUMMARY OF THE INVENTION 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 and apparatus for converting a light source characteristic of a laser beam and a light conversion characteristic of a phosphor into white light suitable for automobile lighting, And to provide a headlight device for a vehicle using a laser and a phosphor capable of illuminating the front with a roughness and a straightness.

According to an aspect of the present invention, there is provided a headlight device for a vehicle using a laser and a phosphor, comprising: a plurality of blue laser diodes for emitting a blue laser beam forward; An installation main body in which the plurality of blue laser diodes are fixedly installed while being spaced apart from each other at regular intervals; An optical fiber doubler installed in front of the blue laser diode and concentrating the laser beams emitted from the blue laser diode as a single light source; A driving body installed to have an installation groove opened frontward on the front surface of the optical fiber folding unit and coupled to the installation body; A phosphor unit installed in the mounting groove to receive a light source irradiated by the single light source conversion unit and convert the light source into white light; A white light diffusing part installed in the mounting groove of the driving body as a photomultiplier to irradiate the white light converted by the phosphor part in the forward direction of the driving body; And a pivoting portion for pivoting the driving body in the up-down direction and the left-right direction.

In addition, in the present invention, the installation body is formed with installation holes through which the plurality of blue laser diodes are installed, passing through the installation body, connected to the laser diode at the rear end of the installation hole, It is preferable that a cooling part is further provided.

In the present invention, the cooling unit may include: a first cooling jig coupled to a rear end of the laser diode, the first cooling jig having a first cavity; A second cooling jig facing the first cooling jig and having a second cavity; A metallic heat transfer material filled in the first and second cavity integration spaces formed by the coupling of the first and second cooling jigs; And a coolant circulation unit circulating the coolant to the second cooling jig.

In the present invention, the metallic thermally conductive material is preferably a low melting point metal having a melting point of 7 ° C or lower.

Further, in the present invention, the optical fiber bundle includes a plurality of individual optical fibers respectively coupled to the front ends of the laser diodes; And a single light source forming unit in which the plurality of individual optical fiber ends are combined.

In the present invention, it is preferable that the phosphor portion is a crystal type phosphor.

Further, a headlight device for a vehicle using a laser and a phosphor according to the present invention includes a phosphor driving part coupled to a rear end of the phosphor part and driving the phosphor part forward and rearward; And a phosphor mounting part coupled to the phosphor driving part and for fastening the phosphor part and the phosphor driving part to the driving body.

Further, in the present invention, the phosphor mounting portion may include: a circular protective glass for blocking the opening of the mounting body; A metal band formed along an inner peripheral surface of the protective glass; A cathode terminal connected to one end of the metal strip and connected to an anode of a power supply line supplied to the laser diode; And a negative electrode terminal coupled to the other end of the metal strip and connected to the negative electrode of the power line supplied to the laser diode.

Further, the automotive headlight device using the laser and the phosphor according to the present invention may further include: an outer cover which is fastened with the protective glass interposed in the installation groove of the installation body; And a sealing gasket provided between the outer cover and the mounting body to seal the inner space of the mounting body.

The headlight device of the present invention is advantageous in that it can convert white light suitable for automobile lighting by using the point light source characteristic of the laser beam and the light conversion characteristic of the phosphor, and then can perform the long distance irradiation while minimizing the energy loss of the beam.

Further, the headlight device for an automobile according to the present invention can irradiate the front side with superior illuminance and linearity than conventional headlight devices, so that it can be universally applied to next-generation electric vehicles and general automobile lighting devices.

1 is a perspective view showing a configuration of a headlight device for a vehicle according to an embodiment of the present invention.
2 is a cross-sectional view showing a configuration of a headlight device for an automobile according to an embodiment of the present invention.
3 is a view showing an optical path of a headlight device for an automobile according to an embodiment of the present invention.
4 is a diagram showing a configuration of a cooling section according to an embodiment of the present invention.
5 is a view showing a configuration of a protective glass according to an embodiment of the present invention.

Hereinafter, a specific embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 to 3, a headlight device 100 for a vehicle using a laser and a phosphor according to the present embodiment includes a blue laser diode 110, an installation body 120, an optical fiber outrigger 130, A body 140, a phosphor unit 150, a white light diffusion unit 160, and a rotation unit 170.

First, as shown in FIGS. 2 and 3, the blue laser diode 110 is a component in which a plurality of blue laser diodes radiating a blue laser beam forward are disposed. 3, each of the plurality of blue laser diodes 110 is installed such that each laser beam is irradiated in parallel and each laser beam is irradiated in parallel. Each of the laser diodes 110 is a laser diode Can be used as it is.

1 and 2, the mounting body 120 is a component for providing a mounting position and a space of the plurality of blue laser diodes 110. And the plurality of blue laser diodes are stably installed such that a plurality of laser beams irradiated from the plurality of blue laser diodes 110 are irradiated in parallel by the installation body 120. The installation body 120 may further include a cooling unit 180 for cooling the blue laser diode.

 The low-power laser used in the present embodiment requires a proper and continuous cooling device considering a spatial limitation because a laser diode is small but generates a high temperature compared to its size. Generally, active cooling using a cooling fan can be considered, but passive cooling is advantageous because it increases power consumption and affects the entire device in the event of a failure.

In conduction conditions, it is best to eliminate the gap between the media because the boundary conditions between the two media are very important. Therefore, machining is required to reduce the tolerance. However, considering the machining condition and ease of assembly, it is not advantageous because the tolerance is small. Therefore, an economical way of eliminating large or small tolerance space through additional measures should be studied and equipped. In this embodiment, the thermal conduction phenomenon can be completely performed by using a metal material that can completely fill the spaces between the two parts. This metallic material has a melting point of about 6.5 degrees, so when the temperature is low, it is solid.

4, the first cooling jig 181, the second cooling jig 182, the metallic heat transfer material 183, and the refrigerant circulation unit 184 ). ≪ / RTI >

The first cooling jig 181 is coupled to the rear end of the laser diode 110 and is a component having a first cavity. The second cooling jig 182 is installed to face the first cooling jig 181 and is a component having a second cavity.

The metallic heat transfer material 183 is a component that is filled in the first and second cavity integration spaces formed by the combination of the first and second cooling jigs 181 and 182 as shown in FIG. . The refrigerant circulation unit 184 circulates the refrigerant to the second cooling jig 182.

Also, as described above in the present embodiment, the metallic thermally conductive material 183 is preferably a low melting point metal having a melting point of 7 ° C or lower.

As shown in FIG. 2, the optical fiber bundle 130 is installed in front of the blue laser diode 110, and the laser beams irradiated from the blue laser diode 110 are collected as a single light source. It belongs to the component. In this embodiment, the optical fiber bundle 130 may include an individual optical fiber 132, an adapter 131, and a single light source forming unit 133. 2, the optical fiber unit 130 is coupled to the front ends of the plurality of blue laser diodes 110 and guides the laser beams to a specific point in front of the installation body 120. As shown in FIG. The optical fiber 132 may include optical fibers coupled to the plurality of blue laser diodes to guide the blue laser beam toward the phosphor unit 150 without loss of light.

At this time, it is preferable that the headlight device 100 according to the present embodiment further includes an adapter 131, as shown in FIG. The adapter 131 is installed between the laser diode 110 and the optical fiber 132 and couples the laser diode 110 and the optical fiber 132 to outflow the laser beam output from the laser diode 110. To the optical fiber 132 without the need for the optical fiber.

Since the diameter of the optical fiber 132 is very constant, the diameter of the laser beam output through the optical fiber can be uniformly adjusted. Therefore, when the optical fiber is connected using the adapter near the beam output end of the laser diode 110, the laser beam enters into the optical fiber 132 and propagates to the end while causing total internal reflection.

2, the single light source forming unit 133 is coupled to the ends of the plurality of optical fibers 132, converts the laser beams into a single light source by superimposing the plurality of laser beams, It is a component to investigate. In the present embodiment, the single light source forming unit 133 collects the ends of the optical fiber 132 that are not connected to the adapter 11 and fixes them with an appropriate jig. When the optical fiber 132 is welded, A light source forming portion 133 is formed.

After arranging the ends of one strand of the optical fibers at regular intervals (equi-angularity) on the jig, the other end of the optical fiber is fixed and the other is inserted into the heat-resistant soft tube to be bundled. Rotate the jig and tube at the same speed and weld slowly using the torch flame on the side fixed to the tube. Gently pull the tube under the condition that the optical fiber can be stretched by looking at the state of welding, and pull the optical fiber to adjust the proper diameter. The welding length should be 2cm or more and the output efficiency is improved as the welded diameter is constant.

2 and 3, the driving body 140 is installed to have an installation groove 142 opened frontward on the entire surface of the optical fiber unit 130, and the installation body 120, It is a component to be combined. The optical fiber 130 and the mounting body 120 are coupled to each other by the rear side of the driving body 140 and the phosphor part 150 and the white light diffusion part 160 are coupled to the front side, The entire headlight device 100 is driven by the rotary part 170 coupled to the lower side of the vehicle.

2, the driving body 140 includes a mounting groove 142, a light passing hole 144, and a diffusion portion mounting groove 146. [

1, the phosphor unit 150 is installed at a specific point in front of the white light diffusing unit 160, and converts the blue laser beam into white light. Since the laser beam used in this embodiment is focused and irradiated to the phosphor 150, the organic fluorescent substance, which does not guarantee the heat resistance performance of the phosphor, burns within a few seconds. Therefore, in the present embodiment, it is preferable to use a crystal-type phosphor excellent in heat resistance.

2 and 3, the white light diffusing unit 160 is provided as a photoreceptor on the rear side of the phosphor unit 150, and the white light converted from the phosphor unit 150 is incident on the phosphor unit 150 150) in the forward direction. At this time, the irradiation range of the white light diffusing unit 160 can be adjusted by adjusting the distance between the parabolic surface of the white light diffusing unit 160 and the phosphor unit 150.

Therefore, it is preferable that the headlight device 100 according to the present embodiment further includes a phosphor driving part 191 and a phosphor mounting part 190, as shown in FIGS. When the focal point of the white light diffusing unit 160 and the phosphor are in the same position, the white light in the phosphor 150 is diverged as parallel light, and the irradiation range thereof may be narrowed. Therefore, a mechanical structure capable of changing the focal length or varying the position of the phosphor is required.

2, the phosphor driving unit 191 is coupled to a rear end of the phosphor unit 150 and has a structure for driving the phosphor unit 150 in the forward and backward directions. For example, the phosphor driving unit 191 may be coupled to a rear end of the phosphor, and may have a structure to drive the phosphor unit 150 forward and backward while rotating along the screw structure with respect to the phosphor mounting unit 190.

2 and 3, the phosphor driving unit 191 is coupled to the phosphor driving unit 190 and the phosphor driving unit 191 is connected to the driving body 140 As shown in Fig. Therefore, the phosphor mounting part 190 preferably has a spiral structure that can be fastened to the front end of the driving body 140, and is made of a material through which white light can pass.

5, the phosphor mounting unit 190 includes a protective glass 191, a metal strip 192, a positive electrode terminal 193, and a negative electrode terminal 194, as shown in FIG. .

First, the protective glass 191 is a component for blocking the opening of the driving body 140, and may have various shapes, for example, a circular protective glass. As shown in FIG. 5, the metal strip 192 is formed along the inner surface of the inner surface of the protective glass 191, and both ends of the metal strip 192 are spaced apart from each other.

5, the positive electrode terminal 193 is coupled to one end of the metal strip 192 and is connected to the positive electrode of a power supply line supplied to the laser diode 110. [ The cathode terminal 194 is coupled to the other end of the metal strip 193 and is connected to the cathode of the power line supplied to the laser diode 110.

Since a highly precise optical system is mounted inside the headlight device 100 according to the present embodiment, a protective glass 191 is installed to prevent an accident that a contamination source is invaded from the outside to lose performance. In addition, a circuit is formed on the surface of the protective glass to detect whether the protective glass is broken, and power is supplied to the laser diode via this circuit so that the laser power is automatically cut off through the control unit Respectively.

In this embodiment, the rotary unit 170 is a component that rotates the driving body 140 in the up-and-down direction and the left-right direction as shown in FIG. The headlight device 100 must be able to rotate at various angles so as to illuminate various positions in the state of being mounted on a vehicle or the like. 3, the rotary unit 170 includes a vertical axis turning gear 171, a vertical axis driving motor 172, a mounting bracket 170, A horizontal axis rotating gear 173, a horizontal axis rotating gear 174, and a horizontal axis driving motor 175.

3, the vertical axis turning gear 171 is curved on the lower surface of the driving body 140 and rotates the driving body 140 in the vertical direction. As shown in FIG. 3, the vertical axis driving motor 172 is installed to engage with the vertical axis rotating gear 171 and rotates the vertical axis rotating gear 171.

3, the mounting bracket 173 is a component in which the vertical axis driving motor 172 and the driving body 140 are installed. The horizontal axis rotating gear 174 is mounted on the mounting bracket 173, And is a constituent element for rotating the mounting bracket 173 in the horizontal direction. The horizontal axis rotating gear 174 rotates the mounting bracket 173 in a direction parallel to the paper surface and rotates the headlight device 100 in various directions in combination with the rotation operation of the vertical axis rotating gear 171. [ It can be done.

As shown in FIG. 3, the horizontal axis driving motor 175 is installed to mesh with the horizontal axis rotating gear 174, and is a component for rotating the horizontal axis rotating gear.

The headlight device 100 according to the present embodiment may further include an outer cover 200 and a sealing gasket 201, as shown in FIGS. The outer cover 200 is a component that is fastened in a state where the protective glass 191 is interposed in an installation groove of the driving body 140. The sealing gasket 201 is formed of the outer cover 200, And is installed between the main body 140 to seal the inner space of the main body 140. [

100: Headlight device for a vehicle using a laser and a phosphor according to an embodiment of the present invention
110: blue laser diode 120: installation body
130: optical fiber folded portion 140: driving body
150: phosphor section 160: white light diffusing section
170:

Claims (9)

A plurality of blue laser diodes for forwardly irradiating the blue laser beam;
An installation body through which a plurality of blue laser diodes are fixedly installed while being spaced apart from each other by a predetermined distance;
An optical fiber doubler installed in front of the blue laser diode and concentrating the laser beams emitted from the blue laser diode as a single light source;
A driving body installed to have an installation groove opened frontward on the front surface of the optical fiber folding unit and coupled to the installation body;
A phosphor unit installed in the mounting groove to receive a light source irradiated by the single light source conversion unit and convert the light source into white light;
A white light diffusing part installed in the mounting groove of the driving body as a photomultiplier to irradiate the white light converted by the phosphor part in the forward direction of the driving body;
A pivoting portion for pivoting the driving body in the up-down direction and the left-right direction;
And a cooling unit connected to the laser diode at a rear end of the installation hole to cool the laser diode,
The cooling unit includes:
A first cooling jig coupled to a rear end of the laser diode and having a first cavity;
A second cooling jig facing the first cooling jig and having a second cavity;
A metallic heat transfer material filled in the first and second cavity integration spaces formed by the first and second cooling jigs and having a melting point of 7 ° C or lower;
And a coolant circulation unit for circulating the coolant to the second cooling jig. delete delete delete The optical fiber connector according to claim 1,
A plurality of individual optical fibers respectively coupled to the front ends of the laser diodes;
And a single light source forming unit in which the plurality of individual optical fiber ends are joined together. 2. The phosphor according to claim 1,
Wherein the phosphor is a crystal type phosphor. The method according to claim 6,
A phosphor driving unit coupled to a rear end of the phosphor unit to drive the phosphor unit forward and backward;
And a phosphor mounting part coupled to the phosphor driving part and fastening the phosphor part and the phosphor driving part to the driving body. 8. The phosphor according to claim 7,
A circular protective glass for blocking the opening of the installation body;
A metal band formed along an inner peripheral surface of the protective glass;
A cathode terminal connected to one end of the metal strip and connected to an anode of a power supply line supplied to the laser diode;
And a negative terminal coupled to the other end of the metal strip and connected to a cathode of a power supply line supplied to the laser diode. 9. The method of claim 8,
An outer cover which is fastened with the protective glass interposed in the installation groove of the installation body;
And a sealing gasket provided between the outer cover and the installation body to seal the space inside the installation body.

Images