CN111413841B - Wavelength conversion device, light source system and display device - Google Patents
Wavelength conversion device, light source system and display device Download PDFInfo
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- CN111413841B CN111413841B CN201910008220.1A CN201910008220A CN111413841B CN 111413841 B CN111413841 B CN 111413841B CN 201910008220 A CN201910008220 A CN 201910008220A CN 111413841 B CN111413841 B CN 111413841B
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2053—Intensity control of illuminating light
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- Optics & Photonics (AREA)
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- Luminescent Compositions (AREA)
- Semiconductor Lasers (AREA)
Abstract
The application provides a wavelength conversion device, which comprises a first wavelength conversion element, a second wavelength conversion element and a first wavelength conversion element, wherein the first wavelength conversion element is used for converting first excitation light into first lasing light; and the second wavelength conversion element is used for converting the second excitation light into second lasing light, the first excitation light and the second excitation light are transmitted along different light paths, the wavelength of the first lasing light is in a first wavelength range, the wavelength of the second lasing light is in a second wavelength range, and the first wavelength range is wider than the bandwidth of the second wavelength range, so that the brightness and the color purity of illumination light for display are improved, and the adopted structure has the advantages of simple process and low cost. The application also provides a light source system and display equipment comprising the wavelength conversion device.
Description
Technical Field
The present application relates to the field of display technologies, and in particular, to a wavelength conversion device, a light source system, and a display device.
Background
At present, the method for obtaining the light sources with various colors (especially white light sources) adopts the main technical scheme of RGB mixed light and fluorescence conversion besides the light emitting diodes with corresponding colors. The fluorescent conversion scheme utilizes the emitted light from other light sources (such as but not limited to an LED chip) to excite fluorescent powder to generate laser with longer wavelength, and an optical system obtained by adopting the fluorescent conversion scheme has simple structure, low manufacturing cost and strong practicability.
In the existing red light emitting device adopting the fluorescence conversion scheme, red fluorescent powder is easy to reach a thermal saturation state due to large thermal Stokes displacement of red light, so that the red light conversion efficiency is reduced. In practical applications, a material including YAG: ce (Ce) 3+ Referring to fig. 1, under the same excitation power, the spectrum of red laser emitted by the red wavelength conversion material is 902a, and the spectrum of yellow laser emitted by the yellow wavelength conversion material is 901a, so that the energy of yellow laser is larger than that of red laser (the spectrum energy is the area covered by the spectrum). However, the wavelength range of yellow covered by the laser spectrum 901a is about500nm-700nm, and only spectral components with wavelengths longer than 590nm correspond to red light. It can be seen that in order to obtain a red light output, a red filter must be used to filter out components of the yellow light spectrum having wavelengths less than 590 nm. Referring to fig. 2, the filtered yellow laser spectrum is 901b, and the filtered red laser spectrum is 902b. As can be seen simply from the spectrum, the energy loss of the yellow laser spectrum 901a during the filtering process is large. While the red lasing spectrum 902a is itself low energy, most of its energy is concentrated in the band range of wavelengths greater than 590nm, so there is little energy loss during filtering. Before filtering, the luminous flux of the yellow laser spectrum is 4.56 times of that of the red laser spectrum, however, after the filtering reaches the same red color coordinates, the luminous flux of the filtered yellow laser is only 11.6 percent before filtering, and the luminous flux of the filtered red laser is 53.4 percent before filtering. Finally, the red light flux emitted by the method for generating red light by adopting the yellow wavelength conversion material and the red light filter is almost the same as that emitted by the method for generating red light by adopting the red wavelength conversion material, although YAG with higher light saturation property is used in the former method: ce (Ce) 3+ The yellow fluorescent powder can lose most of energy in the subsequent filtering process, the luminous flux of the finally filtered monochromatic light is also unsatisfactory, the overall energy conversion efficiency is low, and the volume and the cost of the light source are increased.
In addition, the known high-brightness red light emitting device adopts long-wavelength yellow fluorescent powder or short-wavelength red fluorescent powder and red laser to generate red light, and the red laser has higher efficiency and brightness, but has higher cost and higher packaging requirement, and an additional light path is required to be added, so that the light source and the display equipment are not beneficial to the miniaturization design of the volume, and the existing red light emitting device cannot realize high brightness and high efficiency with low cost, and is inconvenient to popularize.
Disclosure of Invention
A first aspect of the present application provides a wavelength conversion device comprising:
a first wavelength conversion element for converting the first excitation light into a first lasing light; and
a second wavelength conversion element for converting the second excitation light into a second lasing light;
the first excitation light and the second excitation light are transmitted along different light paths, the wavelength of the first laser is in a first wavelength range, the wavelength of the second laser is in a second wavelength range, and the bandwidth of the first wavelength range is wider than that of the second wavelength range.
A second aspect of the present application provides a light source system comprising:
a light source for emitting excitation light; and
the wavelength conversion device provided in the first aspect of the present application, wherein the first wavelength conversion element and the second wavelength conversion element are configured to receive the excitation light and generate the first lasing section and the second lasing section;
the first laser receiving light and the second laser receiving light are emitted from the light source system along the same light path.
A third aspect of the present application provides a display apparatus comprising:
the light source system as provided in the second aspect of the application.
The wavelength of the first laser emitted by the wavelength conversion device is in the first wavelength range, the wavelength of the second laser emitted by the wavelength conversion device is in the second wavelength range, and the first wavelength range has wider bandwidth compared with the second wavelength range, thereby being beneficial to improving the brightness and the color purity of illumination light for display. The application also provides a light source system and display equipment comprising the wavelength conversion device.
Drawings
In order to more clearly illustrate the embodiments/modes of the present application, the drawings that are required for the description of the embodiments/modes will be briefly described, and it will be apparent that the drawings in the following description are some embodiments/modes of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person having ordinary skill in the art.
FIG. 1 is a graph of stimulated luminescence spectra of a yellow wavelength conversion material and a red wavelength conversion material.
Fig. 2 is a spectrum of the stimulated luminescence of the yellow wavelength conversion material and the red wavelength conversion material after passing through the filter device.
Fig. 3 is a schematic structural diagram of a light source system provided by the present application.
FIG. 4 is Eu 3+ Absorption and emission spectra curves for doped oxide ceramics.
FIG. 5 is Eu 3+ And normalizing the curve of the absorption spectrum of the doped oxide ceramic and the emission spectrum of the second light source.
Description of the main reference signs
The application will be further described in the following detailed description in conjunction with the above-described figures.
Detailed Description
In order that the above-recited objects, features and advantages of the present application will be more clearly understood, a more particular description of the application will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings. It should be noted that, without conflict, the embodiments of the present application and features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, and the described embodiments are merely some, rather than all, embodiments of the present application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
The application provides a wavelength conversion device and a light source system comprising the same, which can be applied to low-power light source products. The application also provides a display device comprising the light source system, which can be applied to projection products, and is particularly suitable for miniature projectors. The light source system and the display device provided by the application have the characteristics of high light efficiency, high brightness and high color purity, and the wavelength conversion device has simple structure and manufacturing process and low cost, and has wide market application prospect.
Referring to fig. 3, the present application provides a light source system 100, wherein the light source system 100 includes a light source 110 and a wavelength conversion device 120. The light source 110 is configured to emit excitation light, and the wavelength conversion device 120 is configured to receive the excitation light and generate a first lasing light and a second lasing light, where the first lasing light and the second lasing light are emitted from the light source system 100 along the same light path.
Further, the light source 110 comprises a first light source 111 for emitting a first excitation light and a second light source 112 for emitting a second excitation light. In the present embodiment, the first light source 111 is a blue light emitting diode (Light Emitting Diode, LED), and the second light source 112 is a laser light source, for example: blue Laser Diode (LD). In one embodiment, the first light source 111 may be a blue LED chip and the second light source 112 may be a blue LD chip. In other embodiments, the types and colors of the first light source 111 and the second light source 112 may be the same or different, the first light source 111 and the second light source 112 may be arc lamp light sources, fluorescent light sources, etc., and the first excitation light and the second excitation light may be white light, ultraviolet light, green light, yellow light, red light, or light of other colors.
The wavelength conversion device 120 includes a first wavelength conversion element 121 and a second wavelength conversion element 122, and a surface of the first wavelength conversion element 121 facing away from the second wavelength conversion element 122 is adhered to the light emitting surface of the first light source 111. The first wavelength conversion element 121 is configured to generate a first lasing light within a first wavelength range under illumination of incident light of the first wavelength conversion element 121; the second wavelength conversion element 122 is disposed adjacent to the first wavelength conversion element 121 for generating a second lasing light within a second wavelength range under illumination of the second wavelength conversion element 122 by incident light. Specifically, the first wavelength conversion element 121 and the second wavelength conversion element 122 are stacked. In other embodiments, the first wavelength conversion element 121 and the second wavelength conversion element 122 may be disposed at intervals. The emission direction of the first lasing light is the same as the direction of the first excitation light incident on the first wavelength conversion element 121, and the emission direction of the second lasing light is opposite to the direction of the second excitation light incident on the second wavelength conversion element 122.
The first wavelength conversion element 121 includes a mixture of a phosphor and silica gel, and the phosphor in the first wavelength conversion element 121 is used to generate a first lasing light under the irradiation of incident light of the first wavelength conversion element 121. In the present embodiment, the first wavelength conversion element 121 is formed by mixing and curing a phosphor and silica gel, and the phosphor is preferably (Sr, ca) AlSiN 3 ：Eu 2 + To produce a first lasing of red color. In order to achieve both the conversion efficiency of the first wavelength conversion element 121 and the reliability of adhesion between the first light source 111 and the second wavelength conversion element 122, the silica gel is preferably methylphenyl silica gel having a refractive index of 1.45 to 1.52. The second wavelength converting element 122 comprises an oxide ceramic, in this embodiment the second wavelength converting element 122 comprises a material doped with Eu 3+ To produce a red second lasing color. The second wavelength conversion element 122 is doped with Eu 3+ The density of the red light ceramic is improved, and the brightness, efficiency and color gamut of the red light emitted by the light source system 100 are further improved.
Specifically, the first wavelength range of the first lasing is wider than the bandwidth of the second wavelength range of the second lasing. In this embodiment, the second wavelength range is 600-620nm, the bandwidth of the second wavelength range is 20nm, the bandwidth of the first wavelength range is greater than 20nm, and the first wavelength range may be, but is not limited to, 580-620nm, 590-630nm, or 570-620nm. In a variation, the second wavelength range is 610-630nm. It will be appreciated that the wavelength converting material in the second wavelength converting element 122 may be flexibly selected according to the target color gamut such that the color coordinates of the second lasing light are within the target color gamut.
Referring to FIG. 4, doped with Eu 3+ The emission spectrum of the oxide ceramic of (1) has stronger 4f-4f sharp line emission within the range of 610-630nm, X=0.64-0.68 in the color coordinates of the emission spectrum, the emitted narrow-band red light has higher color purity, exceeds REC709 red light standard, and is additionally doped with Eu 3+ The oxide ceramic has the advantages of simple preparation process, high-density ceramic can be prepared and formed in air generally, the cost is low, and the thermal conductivity and the stability of the ceramic are high. In the present embodiment, the second wavelength conversion element 122 includes a material doped with Eu 3+ Therefore, not only can the production cost of the light source system 100 be reduced and the production process be simplified, but also the brightness and color purity of the second laser light can be improved and the conversion efficiency of the second wavelength conversion element 122 to the blue laser light can be improved, thereby widening the color gamut of the illumination light emitted from the light source system 100 and improving the light source utilization rate of the illumination light to reduce the light consumption.
In this embodiment, the first light source 111 emits blue LED light including a third wavelength range, which may be, but is not limited to, 450-465nm. (Sr, ca) AlSiN in the second wavelength converting element 122 3 ：Eu 2+ The blue LED light in the third wavelength range can be efficiently absorbed and converted into the first lasing light, which is beneficial to improving the conversion efficiency of the first wavelength conversion element 121 to the first excitation light, thereby reducing the light consumption and achieving the effect of energy saving.
Referring to FIG. 5, eu is doped 3+ The oxide ceramic of (2) is capable of efficiently absorbing light in a fourth wavelength range of the second excitation light, wherein the fourth wavelength range may be, but is not limited to, 462-468nm. Eu doping 3+ The absorption spectrum bandwidth (namely, the corresponding wavelength range at half of the absorption peak) of the oxide ceramic is 4-5nm, eu is doped 3+ The oxide ceramic of (2) exhibits a strong 4f-4f sharp line absorption in the fourth wavelength range. Second light source 112 emitsThe wavelength of the blue laser light is in the fourth wavelength range, specifically, as shown in FIG. 5, the emission spectrum of the second light source 112 is mainly concentrated at 463-467nm, eu 3+ The bandwidth of the absorption spectrum of (a) covers the bandwidth of the second excitation light and exceeds the bandwidth of the second excited light by 1.5nm, so that the second excitation light emitted by the second light source 112 is converted into second lasing light by the second wavelength conversion element 122, and is doped with Eu 3+ In the case where the oxide ceramic of (a) is not saturated, the unconverted portion of the second excitation light does not exist or has a very small duty ratio, so that the utilization ratio of the second excitation light by the second wavelength conversion element 122 is advantageously improved, and the light efficiency of the light source system 100 is advantageously improved.
As shown in fig. 3, the light source system 100 further includes a heat conducting substrate 150, where a side surface of the first light source 111 facing away from the first wavelength conversion element 121 is adhered to the heat conducting substrate 150, the heat conducting substrate 150 is used for conducting heat generated by the first light source 111 into a surrounding space, and the heat conducting substrate 150 or a surface of the first light source 111 connected to the heat conducting substrate 150 is used for reflecting light, so that the second lasing light and the first lasing light exit from the light source system 100 along the same light path. In one embodiment, the heat-conducting substrate 150 is used for reflecting light, and the heat-conducting substrate 150 may be made of various plates with heat-conducting properties, such as a glass plate or a metal plate. In one embodiment, the first light source 111 is connected to the surface of the heat-conducting substrate 150 for reflecting light, for example, the surface may reflect the first excitation light, the first excited light, the second excited light and the second excited light, it is understood that the heat accumulated by the wavelength conversion device 120 during the wavelength conversion process may be diffused into the surrounding space through the first light source 111 and the heat-conducting substrate 150 by heat transfer, so as to reduce the operating temperature of the wavelength conversion device 120, so as to avoid the thermal saturation phenomenon of the wavelength conversion device 120 with the increase of the temperature, and further reduce the conversion efficiency.
The light source system 100 further includes a light receiving lens 130 and a light splitting element 140, where the light receiving lens 130 is configured to guide the first laser light and the second laser light excited on the wavelength conversion device 120 to be incident on the light splitting element 140 in parallel, and the light splitting element 140 includes a first region 141 configured to guide the second excitation light emitted by the second light source 112 to be incident on the second wavelength conversion element 122, and a second region 142 configured to transmit the first laser light and the second laser light and emit red light with high brightness and high color saturation. Optionally, the light source system 100 further includes a light homogenizing element, which is disposed between the light receiving lens 130 and the light splitting element 140, to improve the uniformity of the emitted red light, and the light homogenizing element may be a fly eye lens or a square rod.
On the one hand, the light source system 100 excites (Sr, ca) -containing AlSiN by the blue LED chip 3 ：Eu 2+ The red fluorescent powder of (2) is excited with high efficiency to form red light with wider wavelength range, and on the other hand, eu doped with the red fluorescent powder is excited by a blue light LD chip 3+ The oxide ceramic of the red light-emitting device is used for forming the red light with higher brightness and color purity and narrower wavelength range, and the red light with higher brightness and color purity is formed after the red light with wider wavelength range and the red light with narrower wavelength range are combined, so that the problems of high cost, high process requirement and low red light excitation efficiency of the existing red light-emitting device are solved. The present application also provides a display device comprising a light source system 100, which may be a projection product, preferably a micro projector.
In another modification, the phosphor in the first wavelength conversion element 121 includes a phosphor containing LuAG: ge (gallium nitride) 1+ For generating a first lasing color of green in a first wavelength range, the second wavelength conversion element 122 comprising a phosphor doped with Tb 3+ For generating a second lasing green in a second wavelength range. The primary energy of the second excitation light emitted by the second light source 112 is concentrated in the range of 480-486 nm. The first and second laser beams are transmitted from the light-splitting element 140 to form green light for display.
In a modified embodiment, the phosphor in the first wavelength conversion element 121 includes a phosphor containing YAG: ce (Ce) 3+ The first lasing light generated by the first wavelength conversion element 121 under excitation of the first light source 111 is yellow light. The second wavelength conversion element 122 is configured to generate a second laser beam with red color, and the first excitation light, the second excitation light, the first laser beam, and the second laser beam are reflected by the thermally conductive substrate 150 or the connection surface of the first light source 111 and the thermally conductive substrate 150 and then pass through the beam splitterThe element 140 emerges from the light source system 100 and forms white light for display.
It will be evident to those skilled in the art that the application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned. Furthermore, it is evident that the word "comprising" does not exclude other elements or steps, and that the singular does not exclude a plurality. Several of the means recited in the means claims can also be embodied by one and the same item of hardware or software. The terms first, second, etc. are used to denote a name, but not any particular order.
Finally, it should be noted that the above-mentioned embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made to the technical solution of the present application without departing from the spirit and scope of the technical solution of the present application.
Claims (16)
1. A wavelength conversion device, comprising:
a first wavelength conversion element for converting the first excitation light into a first lasing light; and
a second wavelength conversion element for converting the second excitation light into a second lasing light;
the first excitation light and the second excitation light are transmitted along different light paths; the first laser receiving light and the second laser receiving light are light with the same color, wherein the wavelength of the first laser receiving light is in a first wavelength range, the wavelength of the second laser receiving light is in a second wavelength range, and the first wavelength range is wider than the second wavelength range in bandwidth.
2. The wavelength conversion device according to claim 1, wherein the first wavelength conversion element is configured to convert light in an incident third wavelength range into the first lasing light, and the second wavelength conversion element is configured to convert light in an incident fourth wavelength range into the second lasing light, the third wavelength range being wider than a bandwidth of the fourth wavelength range.
3. The wavelength conversion device according to claim 1, wherein the first wavelength converting element comprises a mixture of a phosphor and silica gel, the phosphor being configured to convert light incident on the first wavelength converting element into the first lasing light.
4. A wavelength conversion device according to claim 3, wherein the phosphor comprises (Sr, ca) AlSiN 3 ：Eu 2 + 、YAG：Ce 3+ Or LuAG: ge (gallium nitride) 3+ 。
5. A wavelength conversion device according to claim 3 wherein the silica gel comprises methylphenyl silica gel having a refractive index of 1.45 to 1.52.
6. The wavelength conversion device according to claim 1, wherein the second wavelength converting element comprises an oxide ceramic.
7. The wavelength conversion device according to claim 6, wherein the oxide ceramic is doped with Eu 3+ Or Tb (Tb) 3+ 。
8. The wavelength conversion device according to claim 1, wherein the first wavelength conversion element and the second wavelength conversion element are stacked; the first wavelength range covers the second wavelength range, or the second wavelength range is partially within the first wavelength range.
9. The wavelength conversion device according to claim 1, wherein the first lasing direction is the same as the direction of the first excitation light, and the second lasing direction is opposite to the direction of the second excitation light.
10. A light source system, comprising:
a light source for emitting excitation light; and
the wavelength conversion device according to any one of claims 1 to 9, wherein the first wavelength conversion element and the second wavelength conversion element are configured to receive the excitation light and generate the first lasing section and the second lasing section, respectively;
the first laser receiving light and the second laser receiving light are emitted from the light source system along the same light path.
11. The light source system of claim 10, wherein the light source comprises a first light source and a second light source, wherein the first light source is configured to emit the first excitation light, and wherein the first excitation light is incident on the first wavelength conversion element to generate the first lasing light; the second light source is configured to emit the second excitation light, and the second excitation light is incident to the second wavelength element to generate the second lasing light.
12. The light source system of claim 11, the first light source comprising a light emitting diode and the second light source comprising a laser light source.
13. The light source system of claim 11, wherein a side surface of the first wavelength converting element facing away from the second wavelength converting element is bonded to the light exit surface of the first light source.
14. The light source system of claim 11, further comprising a thermally conductive substrate to which a side surface of the first light source facing away from the first wavelength converting element is bonded, the thermally conductive substrate being configured to conduct heat generated by the first light source into a surrounding space.
15. The light source system of claim 14, wherein the thermally conductive substrate or a surface of the first light source to which the thermally conductive substrate is coupled is configured to reflect light such that the second lasing light exits the light source system along the same optical path as the first lasing light.
16. A display device comprising a light source system as claimed in any one of claims 10-15.
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| CN201910008220.1A CN111413841B (en) | 2019-01-04 | 2019-01-04 | Wavelength conversion device, light source system and display device |
| PCT/CN2019/127266 WO2020140778A1 (en) | 2019-01-04 | 2019-12-23 | Wavelength conversion device, light source system and display device |
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| CN201910008220.1A CN111413841B (en) | 2019-01-04 | 2019-01-04 | Wavelength conversion device, light source system and display device |
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| CN111413841B true CN111413841B (en) | 2023-08-11 |
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| CN111413841A (en) | 2020-07-14 |
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