WO2019071768A1

WO2019071768A1 - Light-emitting device and vehicle lighting device using light-emitting device

Info

Publication number: WO2019071768A1
Application number: PCT/CN2017/114756
Authority: WO
Inventors: 胡飞; 张宝英; 李屹
Original assignee: 深圳市绎立锐光科技开发有限公司
Priority date: 2017-10-10
Filing date: 2017-12-19
Publication date: 2019-04-18
Also published as: CN109656085B; CN109656085A

Abstract

A light-emitting device and a vehicle lighting device using the light-emitting device, the light-emitting device comprising an excitation light source (1) and a wavelength conversion device (2); the wavelength conversion device (2) comprises a plurality of cells (21) arranged in an array, each cell (21) being respectively internally provided with a wavelength conversion material; an excitation light excites the wavelength conversion material to produce an excited light, the excited light being produced mutually independently by each cell (21), and the excited light produced by each cell (21) being project along a preset light-emitting channel to form a pre-determined pattern. The light-emitting device may achieve stable lighting, and a particular pattern may be formed by means of controlling the brightness of the excited light emitted by each cell (21), while the structure is simple, costs are low, and user experience is good.

Description

Light emitting device and automobile lighting device using the same

Technical field

The present invention relates to the field of optical technologies, and in particular to a light emitting device and an automotive lighting device using the same.

Background technique

At present, projection display is applied to all aspects of life, and the illumination device plays a vital role in car illumination and projection. At present, automobile headlights generally use an LED light source to emit illumination light, or a laser light source to emit illumination light. The brightness of the LED light source is not as good as that of the laser source.

Summary of invention

technical problem

However, the price of the laser light source is relatively expensive, and the laser has strong coherence and is harmful to the human eye. In addition, in some cases, it is necessary to transmit a specific shape or a predetermined pattern, which is complicated to implement and costly in the prior art.

Therefore, it is necessary to provide a new light-emitting device to solve the above problems.

Problem solution

Technical solution

The invention provides a light-emitting device and an automobile lighting device using the same, which can realize relatively stable illumination and can form a specific pattern, has a simple structure, low cost and good user experience.

In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a light-emitting device including an excitation light source for emitting excitation light, and a wavelength conversion device including a plurality of arrays. Cells each having a wavelength conversion material disposed therein, the excitation light exciting the wavelength conversion material to generate a laser beam, and each of the cells independently generates laser light, each of which The laser generated by the cell is projected along a predetermined light exit path to form a predetermined pattern.

Preferably, the excitation light source comprises a plurality of light-emitting cells corresponding to the cells in a one-to-one manner, and each of the light-emitting cells respectively emits an excitation beam into a corresponding cell and excites corresponding cells to emit laser.

Preferably, the light-emitting device controls the brightness of the laser light emitted by the cells by controlling the brightness and/or opening and closing of the respective light-emitting units to form a projection pattern of the light-emitting device.

Preferably, the light emitting device further includes a curved reflecting device disposed on the optical path of the laser beam for reflecting the laser beam to form the emitted light.

Preferably, the curved reflecting device is disposed between the excitation light source and the wavelength conversion device, and the curved reflecting device is provided with a light transmitting component for transmitting excitation light, and the excitation light passes through the light transmitting component Irradiation on the wavelength conversion device excites a laser beam and forms an exit light through the curved reflection device.

Preferably, a focusing lens for concentrating the excitation light onto the light transmissive element is further disposed between the excitation light source and the light transmissive element.

Preferably, the excitation light source is for emitting an excitation light beam, and the excitation light beam excites the wavelength conversion material in the corresponding cell to emit a laser light.

Preferably, the projected area of the excitation light beam on the wavelength conversion device is less than or equal to the area of the cell.

Preferably, the illuminating device further comprises driving means for driving the movement of the excitation light source, the driving means driving the excitation light source to scan on each cell according to a trajectory of a predetermined pattern, and exciting the wavelength conversion material in the corresponding cell A laser is emitted to project the projection pattern.

Preferably, the driving device drives the excitation light source to repeatedly scan according to the predetermined pattern, and performs a discontinuous transition scan on the discontinuity of the predetermined pattern from a plurality of paths to reduce the brightness of the predetermined pattern discontinuity.

Preferably, the wavelength converting material is a phosphor.

In order to solve the above technical problem, another technical solution adopted by the present invention is to provide an automotive lighting device including the light emitting device of any of the foregoing.

Advantageous effects of the invention

Beneficial effect

The beneficial effects of the present invention are: different from the prior art, the present invention provides a light-emitting device, wave The long conversion device includes a plurality of cells arranged in an array, and each of the cells is respectively provided with a wavelength conversion material, and the excitation light generates a laser light through the wavelength conversion material, and each of the cells is independent of each other. The ground generates a laser beam, and the laser light generated by each of the cells is projected along a predetermined light exit path to form a predetermined pattern. The illuminating device of the invention can realize relatively stable illumination, and can control a brightness of the laser light emitted by each cell, can form a specific pattern, has a simple structure, low cost, and has a good user experience.

Brief description of the drawing

DRAWINGS

1 is a schematic structural view of a first embodiment of a light-emitting device of the present invention;

2 is a schematic structural view of a second embodiment of a light-emitting device of the present invention;

3 is a schematic structural view of a third embodiment of a light-emitting device of the present invention;

4 is a schematic structural view of a fourth embodiment of a light-emitting device of the present invention;

Figure 5 is a schematic structural view of a fifth embodiment of the light-emitting device of the present invention;

6 is a schematic structural view of a sixth embodiment of a light-emitting device of the present invention;

Fig. 7 is a view showing a state of use of a sixth embodiment of the light-emitting device of the present invention.

Invention embodiment

Embodiments of the invention

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The invention provides a light-emitting device and an automobile lighting device using the same, which can realize relatively stable illumination and can form a specific pattern, has a simple structure, low cost and good user experience.

Embodiment 1

Please refer to FIG. 1, which is a schematic structural view of a first embodiment of the present invention.

The light-emitting device of the present embodiment includes an excitation light source 1 and a wavelength conversion device 2.

The excitation light source 1 may be any one of a solid excitation light source, a gas excitation light source, and a semiconductor excitation light source for emitting excitation light. In the embodiment, the excitation light source 1 includes a plurality of independently controllable brightness and independent control opening and closing. Light-emitting monomer 11. Each of the light-emitting cells 11 emits an excitation beam, respectively.

The wavelength conversion device 2 includes a plurality of cells 21 arranged in an array, and the light-emitting cells 11 have a one-to-one correspondence with the cells 21. Each of the cells 21 is provided with a wavelength conversion material. Specifically, in the embodiment, the wavelength conversion material is a phosphor, and the excitation light emitted by the light-emitting unit 11 enters the corresponding cell 21 in the wavelength conversion device 2 and is excited. Among them, the wavelength conversion material emits a laser. In the present embodiment, the laser light is directly emitted as the light emitted from the light-emitting device, and a projection pattern is formed in front of the light-emitting device.

Further, the illuminating device of the present invention further includes a control module for setting and storing the predetermined pattern, and controlling the opening and closing of each of the illuminating cells 11 or the brightness of the excitation beam emitted by each of the illuminating cells 11 according to a predetermined pattern. Thereby, the brightness of the laser light generated by each of the cells 21 is controlled to form a desired projection pattern in the outgoing direction of the light-emitting device. It should be noted that the control of the light-emitting unit 11 to open and close and control the brightness of the excitation beam, the two control methods may be selected one or the same, both of which can achieve the purpose of regulation of the present invention, preferably, in the present embodiment In the mode, the opening and closing of the light-emitting cells is controlled, and the brightness of the different light-emitting cells that are turned on is controlled.

Embodiment 2

Referring to Figure 2, there is shown a schematic view of a second embodiment of the present invention. The present embodiment is substantially the same as the first embodiment, and includes an excitation light source 1 that emits excitation light and a wavelength conversion device 2. The excitation light source 1 includes a plurality of light-emitting cells 11 that can independently control brightness and turn on and off. The wavelength conversion device 2 includes The plurality of cells 21 arranged in the array, the light-emitting cells 11 and the cells 21 are in one-to-one correspondence, except that in the present embodiment, the optical path direction of the excitation light and the optical path direction of the outgoing light are not in the same axial direction. Preferably, the direction of the optical path of the excitation light is perpendicular to the direction of the optical path of the outgoing light. With such a structure, the distance of the light-emitting device in the optical path direction can be shortened, and the space occupied by the light-emitting device can be effectively reduced.

Embodiment 3

Referring to Fig. 3, there is shown a schematic structural view of a third embodiment of the present invention. This embodiment is an improvement based on the first two embodiments, and is substantially the same as the first two embodiments, including emitting excitation light. The excitation light source 1 and the wavelength conversion device 2 differ only in that the light-emitting device of the present embodiment further includes a curved reflection device 3 disposed on the optical path of the laser light. The laser beam is irradiated onto the curved reflecting means 3 to change the optical path, and the reflection forms parallel outgoing light which is emitted toward the curved direction of the curved reflecting means 3.

The structure can play a role in the convergence of the emitted light. In practical applications, it is applied to the automobile lighting device, and as the illumination lamp or the projection signal lamp of the automobile, the energy loss caused by the divergence of the light can be avoided, and the illumination of the emitted light is made. The scope is farther.

Embodiment 4

Referring to Fig. 4, there is shown a schematic structural view of a fourth embodiment of the present invention. The present embodiment is an improvement based on the third embodiment, and is substantially the same as the third embodiment, and includes an excitation light source 1 that emits excitation light, a wavelength conversion device 2, and a curved reflection device, except that in the present embodiment. In the middle, the curved reflecting means 3 is provided with a light transmitting member 4 for transmitting excitation light. Further, a collecting lens 5 for concentrating the excitation light onto the light transmitting element 4 is further disposed between the excitation light source 1 and the light transmitting element 4.

In the present embodiment, the curved reflecting device 3 is disposed between the excitation light source 1 and the wavelength conversion device 2. If the light transmitting element 4 is not provided, as in the third embodiment, the laser light source 1, the curved reflecting device 3, and the wavelength conversion device 2 need to be dislocated to prevent the curved reflecting device 3 from blocking the optical path of the excitation light. In the present embodiment, the light-transmitting element 4 is provided on the curved reflecting device 3, and the excitation light can be irradiated onto the wavelength conversion device 2 via the light transmitting element 4, thereby exciting the laser light and forming the outgoing light through the curved reflecting device 3.

The concentrating lens 5 can function to converge the light, and converge the divergent excitation light onto the light transmitting element 4 so that the excitation light is more efficiently irradiated through the light transmitting element 4 to the wavelength conversion device 2, thereby improving product efficiency and avoiding energy. loss.

Embodiment 5

Referring to Fig. 5, there is shown a schematic structural view of a fifth embodiment of the present invention. The present embodiment is an improvement made on the basis of the third and fourth embodiments, and is substantially the same, except that in the present embodiment, the curved reflecting device 3 is disposed at a wavelength of the wavelength conversion device away from the excitation light source 1. On the side, in this way, the problem that the curved reflecting device 3 blocks the optical path of the excitation light can be avoided, and the light transmitting member 4 and the focusing lens 5 need not be provided, the number of components is reduced, the system structure is simplified, and the cost of the product is effectively reduced.

Embodiment 6

Referring to Fig. 6, there is shown a schematic structural view of a sixth embodiment of the present invention. The light-emitting device of the present embodiment includes an excitation light source for emitting excitation light and a wavelength conversion device 2.

The excitation light source is used to emit an excitation beam, and the wavelength conversion device 2 comprises a plurality of cells arranged in an array, each of which is provided with a wavelength conversion material, and the excitation beam is generated by the wavelength conversion material, and each cell is The laser is generated independently of each other.

Further, the light emitting device of the present embodiment further includes a driving device for driving the movement of the excitation light source. Similar to the previous embodiments, the lighting device further includes a control module for setting and storing a predetermined pattern. The control module controls the driving device to drive the excitation light source to scan on each cell according to the trajectory of the predetermined pattern, and excites the wavelength conversion material in the corresponding cell to emit the laser light to form a projection pattern of the light emitting device.

Preferably, the projected area of the excitation light beam on the wavelength conversion device 2 is less than or equal to the area of the cell. That is, each time the excitation light source scans a cell, a trajectory of illumination is left, and the excitation light source is repeatedly scanned to form a projection pattern. During the scanning process, according to the preset pattern, the cells form a light-emitting cell 211 and a non-light-emitting cell 212, and the light-emitting cell is a cell on the path through which the excitation light source is scanned.

As shown in FIG. 7, when there is a discontinuity inside the preset pattern, for example, when the excitation beam is scanned from "1" to "2" in the figure, it is necessary to cross some of the fluorescent cells that do not need to be irradiated at the discontinuity, if always along the same When a path crosses from "1" to "2", the path is also displayed. Therefore, when crossing from "1" to "2", it can be traversed along different paths, as shown in Fig. 7, from "1" to "2" and from "2" to "1" along multiple paths, respectively The distributed transition scan is performed from path 1, path 2, and path 3. Since the image seen by the human eye has an integral effect, as long as the driving device is fast enough and the number of scans in the predetermined area is sufficiently large, it will be seen in the human eye. A continuous pattern of scan traces that match. Thereby, the brightness of the discontinuity of the predetermined pattern can be effectively reduced, so that the brightness at the discontinuity is not perceived by the human eye. The invention further provides an automotive lighting device comprising the lighting device of any of the above embodiments.

The invention has the beneficial effects that the present invention provides a light-emitting device. The wavelength conversion device includes a plurality of cells arranged in an array, and each of the cells is respectively provided with a wavelength conversion. The material is changed, the excitation light is generated by the wavelength conversion material, and each of the cells generates laser light independently of each other. The illuminating device of the invention can realize relatively stable illumination, and can control a brightness of the laser light emitted by each cell, can form a specific pattern, has a simple structure, low cost, and has a good user experience.

The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformation of the present invention and the contents of the drawings may be directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims

A light-emitting device comprising an excitation light source and a wavelength conversion device, wherein the excitation light source is for emitting excitation light, wherein the wavelength conversion device comprises a plurality of cells arranged in an array, each of the cells respectively Provided with a wavelength converting material, the excitation light excites the wavelength converting material to generate a laser beam, and each of the cells generates laser light independently of each other, and the laser light generated by each of the cells is along a predetermined light exiting channel Projected to form a predetermined pattern.
The illuminating device according to claim 1, wherein the excitation light source comprises a plurality of illuminating cells in one-to-one correspondence with the cells, and each of the illuminating cells respectively emits an excitation beam to a corresponding one. Within the cell and fire the corresponding cell to emit a laser.
The light emitting device according to claim 2, wherein the light emitting device controls the brightness of the laser light emitted by the cells by controlling the brightness and/or opening and closing of the respective light emitting cells to form a projected pattern of the light emitting device.
The light-emitting device according to claim 1, wherein the light-emitting device further comprises a curved reflecting means disposed on the optical path of the laser beam for reflecting the laser beam to form the emitted light.
The illuminating device according to claim 4, wherein said curved reflecting means is disposed between said excitation light source and said wavelength converting means, and said curved reflecting means is provided with a light transmitting member for transmitting excitation light The excitation light is irradiated onto the wavelength conversion device via the light transmissive element, and a laser beam is excited on the wavelength conversion device, and the laser light is emitted by the curved reflection device to emit light.
The illuminating device according to claim 5, wherein a condensing lens for concentrating the excitation light onto the light transmissive element is further disposed between the excitation light source and the light transmissive element.
The illumination device of claim 1 wherein said excitation source is for emitting an excitation beam that excites a wavelength converting material within a corresponding cell to emit a laser.
The light emitting device according to claim 7, wherein a projected area of said excitation light beam on said wavelength conversion device is less than or equal to an area of said cell.
The illuminating device according to claim 7, wherein said illuminating device further comprises driving means for driving said excitation light source to move, said driving means driving said excitation light source in each of said trajectories of said predetermined pattern The cells are scanned to excite the wavelength converting material within the respective cells to emit a laser, thereby projecting to form the pattern.
The illuminating device according to claim 9, wherein the driving device drives the excitation light source to perform repeated scanning according to the predetermined pattern, and performs a distributed transition scanning from a plurality of paths to a discontinuity of the predetermined pattern to reduce The brightness of the pattern discontinuity is predetermined.
An automotive lighting device comprising the light emitting device according to any one of claims 1 to 11.