CN106895271A - A kind of lighting device and vehicle headlamp apparatus - Google Patents

Abstract

The invention discloses an illuminating device and a vehicle headlight device, comprising: a laser light source for emitting laser light; a first substrate and a reflector arranged on the first substrate, and a reflector and the first substrate are provided with a The light outlet, and the side of the reflection cover facing the first substrate is a reflection surface; the wavelength conversion device arranged on the first substrate and between the first substrate and the reflection cover, the wavelength conversion device includes a plurality of wavelength conversion regions, and the wavelength conversion The area is used to receive the laser light and convert it into the received light and emit it to the reflective surface, and the reflective surface reflects the received light in a predetermined direction to the light outlet; and, the control device connected with the wavelength conversion device is used to drive the wavelength conversion device to switch The corresponding wavelength conversion area receives laser light. The illuminating device provided by the invention not only has high light output brightness, but also has a simple structure and small volume.

Description

A lighting device and a headlight device for a vehicle

technical field

The invention relates to the technical field of lighting, and more specifically, to a lighting device and a vehicle headlight device.

Background technique

The vehicle headlight device is one of the important components of the vehicle, and the brightness of the light emitted by the vehicle headlight device at night is closely related to the safe driving of the driver. With the continuous development of the lighting technology field, in order to improve the brightness of the vehicle headlight device, the existing vehicle headlight device generally uses a light emitting diode (LED, Light Emitting Diode) as the light source. But the existing headlight device for vehicles that adopts light-emitting diodes as the light-emitting light source has reached the limit of its luminous brightness. If you want to improve the headlight device for vehicles again, you need to increase the number of light-emitting diodes, but the existing The available space of the vehicle headlamp device of the present invention is limited, and the quantity of light-emitting diodes cannot be increased again.

Contents of the invention

In view of this, the present invention provides an illuminating device with high luminance, simple structure and small volume.

To achieve the above object, the technical solutions provided by the invention are as follows:

A lighting device comprising:

A laser light source for emitting laser light;

a first substrate and a reflection cover arranged on the first substrate, a light outlet is provided between the reflection cover and the first substrate, and the side of the reflection cover facing the first substrate is a reflection surface;

a wavelength conversion device disposed on the first substrate and between the first substrate and the reflection cover, the wavelength conversion device includes a plurality of wavelength conversion regions, and the wavelength conversion regions are used to receive the The laser light is converted into the received light and then emitted to the reflective surface, and the reflective surface reflects the received light out of the light outlet in a predetermined direction;

And, the control device connected with the wavelength conversion device is used to drive the wavelength conversion device to switch the corresponding wavelength conversion region to receive the laser light.

Preferably, the wavelength conversion device includes:

second substrate;

A plurality of phosphor layers arranged in a ring on the side of the second substrate facing the reflective surface, each phosphor layer corresponding to one of the wavelength conversion regions;

Wherein, the control device is used to drive the second substrate to switch the corresponding phosphor layer to receive the laser light.

Preferably, in the wavelength conversion device, at least one, the surface of the phosphor layer facing the reflective surface receives the light spot of the laser light different from the surface of the other phosphor layer facing the reflective surface receiving the laser light spot. Laser spot.

Preferably, in the wavelength conversion device, the surface of the at least one phosphor layer facing the reflective surface is higher than the surfaces of the other phosphor layers facing the reflective surface.

Preferably, in the wavelength conversion device, a light spot conversion device is fixed on the side of the at least one phosphor layer facing the reflective surface.

Preferably, the light spot conversion device is a light-scattering device or a first light-gathering device.

Preferably, all the phosphor layers have the same color;

Alternatively, the color of at least one phosphor layer is different from the color of the remaining phosphor layers.

Preferably, the phosphor layers of all the same colors have different concentrations.

Preferably, the second substrate is a ceramic substrate, a metal substrate, an aluminum nitride ceramic substrate, an alumina ceramic substrate, a single crystal silicon substrate or a silicon carbide substrate.

Preferably, the phosphor layer is made of YAG luminescent ceramics.

Preferably, the laser light source is located outside the reflection cover, and the reflection cover has a light transmission opening, wherein the laser light enters the wavelength conversion region through the light transmission opening.

Preferably, it further includes: a second light concentrating device arranged on the light output optical path of the laser light source and between the laser light source and the wavelength conversion device.

Preferably, the reflective surface is a curved reflective surface.

The present invention also provides a vehicle headlamp device comprising the above lighting device.

Compared with the prior art, the technical solution provided by the present invention has at least the following advantages:

The present invention provides an illuminating device, comprising: a laser light source for emitting laser light; a first substrate and a reflector disposed on the first substrate, a light outlet is provided between the reflector and the first substrate, And the side of the reflection cover facing the first substrate is a reflection surface; the wavelength conversion device arranged on the first substrate and between the first substrate and the reflection cover, the wavelength conversion device Including a plurality of wavelength conversion regions, the wavelength conversion region is used to receive the laser light and convert it into the received light and emit it to the reflective surface, and the reflective surface reflects the received light in a predetermined direction to the outgoing light and a control device connected to the wavelength conversion device, used to drive the wavelength conversion device to switch the corresponding wavelength conversion region to receive the laser light.

It can be seen from the above that, in the technical solution provided by the present invention, after the lighting device uses laser light to irradiate the wavelength conversion region, the obtained laser light is emitted in a predetermined direction, and the brightness of the laser light source is high, which ensures the high brightness of the lighting device. ; The structure of the lighting device is simple, and the volume of each component is limited, which ensures that the volume of the lighting device is small; through the semi-closed fixing method of the reflector and the first substrate, it is ensured that all the received laser light is emitted, and the light is avoided. In addition, the control device controls the wavelength conversion device to switch different wavelength conversion regions to receive laser light, so as to achieve different light output effects of the lighting device, which improves the applicability and flexibility of the lighting device.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural diagram of a lighting device provided by an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a wavelength conversion device provided in an embodiment of the present application;

Fig. 3a is a schematic structural diagram of another lighting device provided by the embodiment of the present application;

Fig. 3b is a schematic structural diagram of another lighting device provided by the embodiment of the present application;

Fig. 4 is a schematic structural diagram of another illuminating device provided by the embodiment of the present application.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As stated in the background technology, the luminous brightness of the existing vehicle headlamp devices using light-emitting diodes as the light source has reached the limit. If you want to improve the vehicle headlamp device again, you need to increase the number of light-emitting diodes , but the utilization space of the existing vehicle headlamp device is limited, and the quantity of light-emitting diodes cannot be increased again.

Based on this, an embodiment of the present application provides a lighting device, which not only has high light output brightness, but also has a simple structure and a small volume. In order to achieve the above purpose, the technical solutions provided by the embodiments of the present application are as follows. Specifically, referring to FIG. 1 to FIG. 4 , the technical solutions provided by the embodiments of the present application are described in detail.

Referring to FIG. 1, it is a schematic structural diagram of a lighting device provided by an embodiment of the present application, wherein the lighting device includes:

A laser light source 10 for emitting laser light;

The first substrate 20 and the reflection cover 30 arranged on the first substrate 20 , there is a light outlet 21 between the reflection cover 30 and the first substrate 20 , and the reflection cover 30 faces the first substrate 20 One side is the reflective surface 31;

A wavelength conversion device 40 disposed on the first substrate 20 and located between the first substrate 20 and the reflector 30, the wavelength conversion device 40 includes a plurality of wavelength conversion regions 41, the wavelength conversion The area 41 is used to receive the laser light and convert it into the received light and emit it to the reflective surface 31, and the reflective surface 31 reflects the received light out of the light outlet 21 in a predetermined direction;

And, the control device 50 connected with the wavelength conversion device 40 is used to drive the wavelength conversion device 40 to switch the corresponding wavelength conversion region 41 to receive the laser light.

It can be seen from the above that, in the technical solution provided by the embodiment of the present application, after the lighting device irradiates the wavelength conversion region with laser light, the obtained received light is emitted in a predetermined direction. Due to the high brightness of the laser light source, the light output of the lighting device is guaranteed. High brightness; in addition, the structure of the lighting device is simple, and the volume of each component is limited, which ensures that the volume of the lighting device is small; in addition, through the semi-closed fixing method of the reflector and the first substrate, it is guaranteed that the laser light All output, avoiding the waste of light; and, through the control device to control the wavelength conversion device to switch different wavelength conversion areas to receive laser light, so as to achieve different light output effects of the lighting device, improving the applicability and flexibility of the lighting device

The wavelength conversion region provided in the embodiment of the present application may be composed of phosphor powder, and the phosphor powder is irradiated with laser light to generate received light as a light source of the illuminating device. Specifically, refer to FIG. 2, which is a schematic structural diagram of a wavelength conversion device provided in an embodiment of the present application, wherein the wavelength conversion device includes:

the second substrate 42;

A plurality of phosphor layers 41 disposed on the side of the second substrate 42 facing the reflective surface and arranged in a ring, each phosphor layer 41 corresponds to one of the wavelength conversion regions;

Wherein, the control device is used to drive the second substrate 42 to switch the corresponding phosphor layer 41 to receive the laser light, that is, the laser light emitted by the laser light source 10 .

Specifically, the wavelength conversion device is a reflective wavelength conversion device, wherein the optical path of the laser light emitted by the laser light source is fixed, so the direction of irradiation to the wavelength conversion device is fixed, and the wavelength conversion device is driven by the control device so that each wavelength conversion region can be Receive the laser light emitted by the laser light source. Among them, the control device provided by the embodiment of the present application can drive the second substrate to rotate to switch the corresponding phosphor layer to receive the laser light; since the multiple phosphor layers are arranged in a ring, by setting the optical path of the laser light emitted by the laser light source, the laser can be Irradiate to a certain position on the ring, and then drive the second substrate to rotate through the control device to achieve the purpose of switching different phosphor layers to receive laser light; wherein, the control device drives the second substrate to pass through the center of the ring and vertically The direction of the ring is the rotation of the axis, and then different phosphor layers are switched to receive laser light.

Wherein, the control device may include a rotating shaft, a motor and a controller, etc., by fixing the rotating shaft to the center of the ring of the second substrate, and then controlling the rotation of the motor through the controller to drive the rotation of the second substrate, and then through A control signal is sent to the controller to control the motor to drive the rotation of the second substrate to switch between different phosphor layers to receive laser light.

In addition, the lighting device provided by the embodiment of the present application can optimize the position of the laser light source, the wavelength conversion device, the reflection cover, and the parameters of the reflective surface of the reflection cover, etc., so that the laser light source can obtain The received light can be emitted in the high beam mode or the low beam mode of the vehicle headlight device through the reflection of the reflector. Since the direction in which the laser is irradiated to the wavelength conversion device is fixed, the lighting device provided in the embodiment of the present application can change the light output direction of the lighting device by changing the parameters such as the position and size of the spot where the laser is irradiated to different wavelength conversion regions; that is, In the wavelength conversion device, the light spot of at least one phosphor layer that receives the laser light on the side facing the reflective surface is different from the light spot that receives the laser light on the surface of the other phosphor layer facing the reflective surface.

Specifically, as shown in FIG. 3a and FIG. 3b , they are schematic structural diagrams of two lighting devices provided by the embodiment of the present application, wherein, in the wavelength conversion device 40, the at least one phosphor layer 41' faces the The surface on one side of the reflective surface is higher than the surface of the rest of the phosphor layer 41 facing the reflective surface.

Wherein, by optimizing the position of the laser light source, the wavelength conversion device, the reflector, and the parameters of the reflective surface of the reflector, etc., as shown in FIG. The received light emitted by the phosphor layer 41 is reflected by the reflective surface 31 of the reflector 30 and emitted in the form of high beam; in addition, as shown in FIG. At this time, due to the change of parameters such as the size and position of the light spot, the direction of the received light emitted by the phosphor layer 41 ′ changes, and then it is reflected by the reflective surface 31 of the reflective cover 30 and emitted in the form of low beam.

It should be noted that Fig. 3a and Fig. 3b are only examples for illustrating the high-beam form and the low-beam form. The thickness of the phosphor layer, the thickness of the laser light source and Parameters such as the laser optical path need to be specifically designed according to the actual application, which is not specifically limited in this application.

In addition, in the embodiment of the present application, in addition to making the surface height of the phosphor layer to be different, parameters such as the position and size of the spot of the phosphor layer irradiated by laser light can also be changed through the spot conversion device, that is, in the wavelength conversion In the device, a spot conversion device is fixed on the side of the at least one phosphor layer facing the reflective surface. Wherein, after the light spot conversion device receives the laser light, it processes the laser light so that the light spot irradiated by the laser light on the phosphor layer corresponding to the light spot conversion device is different from the light spot irradiated on the rest of the phosphor powder layers. Wherein, the spot conversion device provided by the embodiment of the present application is fixed on the side of a phosphor layer facing the reflective surface, so the spot conversion device can move with the control device when switching the phosphor layer, and keep the distance between the phosphor layer and the phosphor layer. location relationship. It should be noted that the embodiment of the present application does not specifically limit the distance between the light spot conversion device and the phosphor layer, and needs to be specifically designed according to actual applications. Wherein, the light spot conversion device provided in the embodiment of the present application is a light astigmatism device or a first light concentrating device. The astigmatism device can be an astigmatism lens, a diffusion sheet, etc., and the first light concentrating device can be a converging lens, especially a plano-concave cylindrical mirror and a double-concave cylindrical mirror. The astigmatism device causes the spot to be enlarged before it irradiates the phosphor layer, not only from the difference in the divergence of the laser light directly caused by the spot size when the laser is irradiated to different wavelength conversion regions, but also because the spot size when the laser is irradiated to different wavelength conversion regions Different results in different laser densities on the surface of the wavelength conversion region, which in turn leads to different brightness and optical density of the received laser light. The arrangement of the plano-concave cylindrical mirror and the double-concave cylindrical mirror makes the light spot diffuse along the direction perpendicular to the light exit direction, and also reduces the exit light density while further expanding the light beam laterally, thus satisfying the requirements of the light beam in the direction of light advance. Lighting needs on both sides.

In addition, in order to enrich the light output color and effect of the lighting device, all the phosphor layers provided in the embodiment of the present application have the same color;

Alternatively, the color of at least one phosphor layer is different from the color of the remaining phosphor layers.

Wherein, when the colors of the multiple phosphor layers are the same, their concentrations can also be changed, that is, the concentrations of all the phosphor layers with the same color are different, so as to change the brightness of the received light after the phosphor layers receive the laser light.

Further, in order to improve the effect of the laser emitted by the laser light source, refer to FIG. 4 , which is a schematic structural diagram of another lighting device provided by the embodiment of the present application, wherein the lighting device further includes: The second light concentrating device 60 on the light output path and between the laser light source 10 and the wavelength conversion device 40 .

Specifically, the laser light source may include one laser, or the laser light source may include multiple lasers; wherein, the second focusing device may include a plurality of focusing lenses, and each focusing lens corresponds to an optical path of a laser, and the The lasers emitted by all the lasers are converged to the same position of the wavelength conversion device, or the second concentrating device includes a condenser lens to converge the lasers emitted by all the lasers to the same position of the wavelength conversion device, which is not specifically limited in this application. It needs to be designed according to the actual application.

In any of the above embodiments, the laser of the laser light source provided in the present application may be a high power threshold laser, which may be a semiconductor laser. When the lighting device is used as a part of the vehicle headlight device, a blue laser can be used, and the phosphor layer can be a yellow phosphor, and by optimizing the concentration of the phosphor layer and the position and size of the light spot of the laser irradiation to the phosphor layer And other parameters, realize the high beam form and the low beam form, and realize the difference in brightness. In addition, as for the position of the laser light source, it may be located inside the reflector, or outside the reflector, and this application is not specifically limited; wherein, the laser light source is located outside the reflector, and the reflector There is a light transmission port, wherein the laser light enters the wavelength conversion region through the light transmission port.

During the process of irradiating the phosphor layer with laser light, the phosphor layer will generate a large amount of heat. Therefore, the second substrate provided by this application needs to be designed as a substrate with high thermal conductivity, which can withstand high temperature without deformation. , whose thermal conductivity is greater than 140W/(m*k), wherein the second substrate can be a ceramic substrate, a metal substrate, an aluminum nitride ceramic substrate, an alumina ceramic substrate, a single crystal silicon substrate or a silicon carbide substrate, and in addition The substrate may be made of other materials, which is not specifically limited in this application. In this application, the first substrate is a light baffle, and the first substrate and the reflector form a semi-closed structure to guide the direction of the outgoing light. In addition, since the first substrate is in contact with the second substrate, this application can also set the first substrate It is a substrate with high thermal conductivity, which improves the heat dissipation effect of the lighting device. The material of the phosphor layer provided in the embodiment of the present application may be YAG (yttrium aluminum garnet, yttrium aluminum garnet) luminescent ceramics.

In order to optimize the reflective surface of the reflector, the reflective surface provided in the embodiment of the present application can be an arc reflective surface, which is designed with a parabolic surface, which can effectively reduce light loss. The angle and reflection of the reflected light on the reflective surface can be simulated by computer modeling The spatial structure of the surface is used to determine its design parameters; in addition, the reflector provided by this application can be made of resin, glass, metal, alloy and other materials, and a highly reflective aluminum or silver film is evaporated on its surface to form a reflective noodle.

Optionally, the lighting device provided in the embodiment of the present application is a vehicle headlight device. Alternatively, the lighting device can also be applied to a lighting system of a projector.

An embodiment of the present application provides an illuminating device, including: a laser light source for emitting laser light; a first substrate and a reflector disposed on the first substrate, and a light-emitting device between the reflector and the first substrate mouth, and the side of the reflection cover facing the first substrate is a reflection surface; the wavelength conversion device arranged on the first substrate and between the first substrate and the reflection cover, the wavelength The conversion device includes a plurality of wavelength conversion areas, and the wavelength conversion areas are used to receive the laser light and convert it into the received light and emit it to the reflective surface, and the reflective surface reflects the received light in a predetermined direction to the the light outlet; and a control device connected to the wavelength conversion device, used to drive the wavelength conversion device to switch the corresponding wavelength conversion region to receive the laser light.

It can be seen from the above that, in the technical solution provided by the embodiment of the present application, after the lighting device irradiates the wavelength conversion region with laser light, the obtained received light is emitted in a predetermined direction. Due to the high brightness of the laser light source, the light output of the lighting device is guaranteed. High brightness; in addition, the structure of the lighting device is simple, and the volume of each component is limited, which ensures that the volume of the lighting device is small; in addition, through the semi-closed fixing method of the reflector and the first substrate, it is guaranteed that the laser light All of them are emitted to avoid the waste of light; and, the control device controls the wavelength conversion device to switch different wavelength conversion regions to receive laser light, so as to realize different light output effects of the lighting device, and improve the applicability and flexibility of the lighting device.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (14)

1. a kind of lighting device, it is characterised in that including：

LASER Light Source, for shoot laser；

First substrate and the reflector being arranged on the first substrate, the reflector and first substrate it Between have a light-emitting window, and the reflector towards the first substrate one side be reflecting surface；

It is arranged at the wavelength on the first substrate and between the first substrate and the reflector Conversion equipment, the Wavelength converter includes multiple wavelength conversion regions, and the wavelength conversion region is used In receive the laser and after being converted into Stimulated Light outgoing to the reflecting surface, the reflecting surface is by institute State Stimulated Light and the light-emitting window is reflected with set direction；

And, the control device being connected with the Wavelength converter, for driving the wavelength convert to fill Put and receive the laser to switch respective wavelength transition region.

2. lighting device according to claim 1, it is characterised in that the Wavelength converter bag Include：

Second substrate；

It is arranged at multiple fluorescent material that the second substrate is set towards the reflecting surface side and in annulus Layer, wavelength conversion region described in each phosphor powder layer correspondence one；

Wherein, the control device is used to drive the second substrate to switch corresponding phosphor powder layer reception institute State laser.

3. lighting device according to claim 2, it is characterised in that in the Wavelength converter In, phosphor powder layer described at least one receives the hot spot of the laser towards the surface of the reflecting surface side The hot spot of the laser is received towards the surface of the reflecting surface side different from other phosphor powder layers.

4. lighting device according to claim 3, it is characterised in that in the Wavelength converter In, at least one phosphor powder layer towards the reflecting surface side surface, higher than remaining phosphor powder layer Towards the surface of the reflecting surface side.

5. lighting device according to claim 3, it is characterised in that in the Wavelength converter In, at least one phosphor powder layer is fixed with a hot spot conversion equipment towards the reflecting surface side.

6. lighting device according to claim 5, it is characterised in that the hot spot conversion equipment is Astigmatism device or the first beam condensing unit.

7. lighting device according to claim 2, it is characterised in that all phosphor powder layers Color is identical；

Or, the color of at least one phosphor powder layer is different from the color of remaining phosphor powder layer.

8. lighting device according to claim 7, it is characterised in that described in all colours identical The concentration of phosphor powder layer is different.

9. lighting device according to claim 2, it is characterised in that the second substrate is ceramics Substrate, metal substrate, aluminum nitride ceramic substrate, aluminium oxide ceramic substrate, monocrystalline silicon substrate or carborundum Substrate.

10. lighting device according to claim 2, it is characterised in that the material of the phosphor powder layer Matter is YAG luminescent ceramics.

11. lighting devices according to claim 1, it is characterised in that the LASER Light Source is located at Outside the reflector, and the reflector has a light-transmitting opening, wherein, printing opacity described in the laser light Mouth is incident to the wavelength conversion region.

12. lighting devices according to claim 1, it is characterised in that also include：It is arranged at institute State second in the light extraction light path of LASER Light Source and between the LASER Light Source and Wavelength converter Beam condensing unit.

13. lighting devices according to claim 1, it is characterised in that the reflecting surface is cambered surface Reflecting surface.

A kind of 14. vehicle headlamp apparatus, including the illumination dress any one of claim 1-13 Put.