CN111679424B - Wavelength conversion device and light source equipment - Google Patents
Wavelength conversion device and light source equipment Download PDFInfo
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- CN111679424B CN111679424B CN202010615589.1A CN202010615589A CN111679424B CN 111679424 B CN111679424 B CN 111679424B CN 202010615589 A CN202010615589 A CN 202010615589A CN 111679424 B CN111679424 B CN 111679424B
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- light
- wavelength conversion
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/007—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light
- G02B26/008—Optical devices or arrangements for the control of light using movable or deformable optical elements the movable or deformable optical element controlling the colour, i.e. a spectral characteristic, of the light in the form of devices for effecting sequential colour changes, e.g. colour wheels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V14/00—Controlling the distribution of the light emitted by adjustment of elements
- F21V14/08—Controlling the distribution of the light emitted by adjustment of elements by movement of the screens or filters
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Astronomy & Astrophysics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Multimedia (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention provides a wavelength conversion device and light source equipment, and relates to the technical field of optics. The wavelength conversion device comprises a substrate, a wavelength conversion material and a reflecting groove, wherein the wavelength conversion material and the reflecting groove are fixedly arranged on the substrate; the reflective trough and the wavelength conversion material are annular; in the radial cross section of the ring, the reflection groove is a part of an ellipse, and the wavelength conversion material is positioned at any focus of the ellipse; exciting light from a light source passes through the wavelength conversion material at the focal point to generate excited light, so that the technical problem of low light extraction efficiency in the prior art is solved.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to a wavelength conversion device and a light source apparatus.
Background
With the development of optical industry technology, high-brightness color light sources, such as stage lighting, projection displays, and red, green, and blue (RGB) triple-color backlights, are required in many applications. The wavelength conversion device can generally convert the wavelength of excitation light emitted by a light source through an excitation fluorescent layer to generate excited light with high brightness and different wavelength from the excitation light, can also enable the excitation light to directly penetrate for imaging, and is widely applied to the technical field of generating white light and monochromatic light due to high efficiency and low cost.
The existing laser phosphor display technology utilizes the rotation of a multi-color phosphor wavelength conversion device to realize the light output of different colors generated at different time, and finally realizes the output of white light. In the conventional wavelength conversion device, an element such as a spectroscope is generally used to separate excitation light from stimulated light, and the excitation light and the stimulated light are combined together to form an output of white light after passing through respective optical paths. However, in order to allow the excitation light and the stimulated light to pass through two optical paths respectively in the prior art, many optical elements such as beam splitters, light condensing elements, and reflection elements need to be used, so that the structure of the wavelength conversion device becomes complicated, and the technical problem of low light extraction efficiency is caused.
Disclosure of Invention
The invention aims to provide a wavelength conversion device and light source equipment to solve the technical problem of low light emitting efficiency in the prior art.
In a first aspect, an embodiment of the present invention provides a wavelength conversion device, including a substrate, and a wavelength conversion material and a reflective groove fixedly disposed on the substrate;
the reflective trough and the wavelength conversion material are annular;
in the radial cross section of the ring, the reflection groove is a part of an ellipse, and the wavelength conversion material is positioned at any focus of the ellipse;
excitation light from a light source passes through the wavelength conversion material at the focal point, generating stimulated light.
In one possible embodiment, the wavelength converting material is disposed on a surface of the substrate.
In one possible embodiment, a light splitting film layer is arranged between the wavelength conversion material arrangement and the substrate;
the light splitting film layer transmits exciting light and reflects excited light.
In one possible embodiment, the substrate includes a heat conductive substrate and a light transmissive substrate in a ring shape;
the light-transmitting substrate is fixedly connected with the heat-conducting substrate, and the wavelength conversion material is arranged on the surface of the light-transmitting substrate.
In one possible embodiment, the wavelength conversion material is a fluorescent plate, and the fluorescent plate is fixedly connected with the substrate.
In a possible implementation manner, a light splitting film layer is arranged on the light incident surface of the fluorescent plate;
the light splitting film layer transmits exciting light and reflects excited light.
In one possible embodiment, the wavelength conversion device further includes a heat dissipation structure disposed on the substrate.
In one possible embodiment, the wavelength conversion device further comprises an actuator connected to the substrate.
In a second aspect, an embodiment of the present invention further provides a light source apparatus, including an excitation light generator, an excitation light optical path component, an excited light optical path component, and the wavelength conversion device described above;
the exciting light emitted by the exciting light generator is incident to the wavelength conversion device through the exciting light optical path component, the wavelength conversion device generates stimulated light, and the stimulated light is output through the stimulated light optical path component.
In one possible embodiment, the stimulated light path component includes a light integrating rod;
the exciting light enters the reflecting groove through the first focus of the ellipse, and the stimulated light exits the reflecting groove through the second focus of the ellipse;
the light entrance of the integrating light rod is located at the second focal point.
The wavelength conversion device provided by the embodiment of the invention comprises a substrate, and a wavelength conversion material and a reflection groove which are fixedly arranged with the substrate, wherein the reflection groove and the wavelength conversion material are annular. In a radial cross-section of the ring, the reflective trough is a portion of an ellipse, such as a half ellipse, with the wavelength converting material located at either focal point of the ellipse. The excitation light passes through the wavelength conversion material at this focal point, generating stimulated light. The embodiment of the invention adopts the semi-elliptical reflecting groove, exciting light enters from the first focus of the reflecting groove, stimulated light exits from the second focus of the reflecting groove, and the stimulated light is generated by the exciting light passing through the wavelength conversion material at the first focus or the second focus in the process. Compared with the prior art, the light emitting device has the advantages that the excitation light and the excited light are enabled to emit light in the same light path, the structure is simpler, the light emitting efficiency is higher, and the technical problem of lower light emitting efficiency in the prior art is solved. In addition, the semi-ellipsoid is a dynamic reflection light receiving structure, so that the semi-ellipsoid has better heat dissipation performance and can bear higher temperature and power.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic diagram of a wavelength conversion device according to an embodiment of the present invention;
fig. 2 is a partial schematic view of a wavelength conversion device according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a wavelength conversion device according to a second embodiment of the present invention;
fig. 4 is a partial schematic view of a wavelength conversion device according to a second embodiment of the present invention;
fig. 5 is a schematic diagram of a light source device according to a third embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
With the development of optical industry technology, high-brightness color light sources, such as stage lighting, projection displays, and red, green, and blue (RGB) triple-color backlights, are required in many applications. The wavelength conversion device can generally convert the wavelength of excitation light emitted by a light source through an excitation fluorescent layer to generate excited light with high brightness and different wavelength from the excitation light, can also enable the excitation light to directly penetrate for imaging, and is widely applied to the technical field of generating white light and monochromatic light due to high efficiency and low cost.
The existing laser phosphor display technology utilizes the rotation of a multi-color phosphor wavelength conversion device to realize the light output of different colors generated at different time, and finally realizes the output of white light. In the conventional wavelength conversion device, an element such as a spectroscope is generally used to separate excitation light from stimulated light, and the excitation light and the stimulated light are combined together to form an output of white light after passing through respective optical paths. However, in order to allow the excitation light and the stimulated light to pass through two optical paths respectively in the prior art, many optical elements such as beam splitters, light condensing elements, and reflection elements need to be used, so that the structure of the wavelength conversion device becomes complicated, and the technical problem of low light extraction efficiency is caused.
The first embodiment is as follows:
as shown in fig. 1, an embodiment of the present invention provides a wavelength conversion device, which includes a substrate, and a wavelength conversion material 11 and a reflective groove 12 fixed to the substrate, where the reflective groove 12 and the wavelength conversion material 11 are annular. In a radial cross-section of the ring shape, the reflective groove 12 is a portion of an ellipse, such as a half ellipse, the inner wall of the reflective groove 12 has a high reflectivity for visible light, and the wavelength converting material 11 is located at the first focus of the ellipse. Excitation light from a light source, for example, blue excitation light, passes through the wavelength conversion material 11 at the focal point, generating excited light of various colors.
In the embodiment of the invention, the semi-elliptical reflecting groove 12 is adopted, the exciting light enters from the first focus of the reflecting groove 12 and passes through the wavelength conversion material 11 to generate the stimulated light, and the stimulated light is reflected by the reflecting groove and then exits from the second focus of the reflecting groove 12. Because the (semi) ellipse has the characteristic that light emitted from one focus is converged on the other focus after being reflected by the inner surface of the ellipse, compared with the prior art, the light emitting device has the advantages that the excitation light and the excited light are emitted in the same light path, the structure is simpler, the light emitting efficiency is higher, and the technical problem of lower light emitting efficiency in the prior art is solved. In addition, the semi-ellipsoid is a dynamic reflection light receiving structure, so that the semi-ellipsoid has better heat dissipation performance and can bear higher temperature and power.
As shown in fig. 1 and 2, in the present embodiment, the wavelength converting material 11 is provided on the surface of the substrate. The substrate comprises a heat conducting substrate 13 and an annular light-transmitting substrate 14, wherein the heat conducting substrate 13 is circular, and the light-transmitting substrate 14 surrounds the heat conducting substrate 13 in a circular ring shape. The transparent substrate 14 is fixedly connected with the heat conducting substrate 13, and the wavelength conversion material 11 is arranged on the surface of the transparent substrate 14.
The light-transmitting substrate 14 should have good thermal conductivity, and is preferably transparent ceramic (such as aluminum oxide, aluminum nitride, silicon carbide, etc.), glass (such as quartz, common optical glass), polyester resin (PET for short), or the like. In addition, a good thermal conductivity is also required between the light-transmitting substrate 14 and the heat-conducting substrate 13 in order to dissipate heat.
Further, a light splitting film layer 15 is arranged between the wavelength conversion material 11 and the light-transmitting substrate 14, and the light splitting film layer 15 transmits the excitation light and reflects the excited light. When the excitation light enters from above, the excitation light can pass through the light splitting film layer 15 without obstruction and passes through the wavelength conversion material 11 to generate excited light; the excited light is reflected by the spectroscopic film layer 15, reflected by the inner surface of the reflection groove 12, and then output from the second focal point.
Further, the wavelength conversion device further includes a heat dissipation structure 16 disposed on the heat conductive substrate 13. The heat dissipation structure 16 is a metal structure with heat dissipation fins and good thermal conductivity, and the material thereof can be silver, copper, aluminum, steel or alloy thereof.
Further, the wavelength conversion device further comprises an actuator 17 connected to the thermally conductive substrate 13. The driver 17 may adopt a dragging mode such as a synchronous motor, a hysteresis motor, a three-phase ac motor, etc. to drive the entire wavelength conversion device to rotate at a high speed.
In other embodiments, the light-transmitting substrate and the heat-conducting substrate may also be an integral structure, i.e. they are an integral body, which is made of light-transmitting material and has good heat conductivity.
Example two:
as shown in fig. 3 and 4, the wavelength conversion device provided in the embodiment of the present invention is substantially the same as the first embodiment, except that the wavelength conversion material 11 is disposed at the second focal point of the ellipse, and the light splitting film 15 is also disposed between the wavelength conversion material 11 and the transparent substrate 14.
In the embodiment of the present invention, the excitation light enters from the first focal point of the reflective groove 12, is reflected by the reflective groove 12, exits from the second focal point of the reflective groove 12, and passes through the wavelength conversion material 11 to generate and output the excited light. Because the (semi) ellipse has the characteristic that light emitted from one focus is converged on the other focus after being reflected by the inner surface of the ellipse, compared with the prior art, the light emitting device has the advantages that the excitation light and the excited light are emitted in the same light path, the structure is simpler, the light emitting efficiency is higher, and the technical problem of lower light emitting efficiency in the prior art is solved. In addition, the semi-ellipsoid is a dynamic reflection light receiving structure, so that the semi-ellipsoid has better heat dissipation performance and can bear higher temperature and power.
In another possible implementation manner, the wavelength conversion material is a fluorescent plate material, which is integrated with the light-transmitting substrate in the above embodiment. The fluorescent plate is fixedly connected with the heat-conducting substrate, and the fluorescent plate can be made of fluorescent ceramic or fluorescent glass.
Furthermore, the light incident surface of the fluorescent plate is provided with a light splitting film layer, and the light splitting film layer transmits exciting light and reflects excited light. The function of the light splitting film layer is the same as that described in the first and second embodiments, and is not described again here.
Example three:
as shown in fig. 5, the embodiment of the present invention provides a light source apparatus including an excitation light generator 20, an excitation light optical path component, an excited light optical path component, and the wavelength conversion device 10 described above. The excitation light generated by the excitation light generator is incident on the wavelength conversion device 10 through the excitation light path component, and the stimulated light is generated by the wavelength conversion device 10 and output to the light source inlet of the optical apparatus 30 (e.g., an optical engine system) through the stimulated light path component.
Wherein, the exciting light path component comprises a first light-gathering element 21, a reflecting mirror 25 and a second light-gathering element 22, and the stimulated light path component comprises a light integrating rod 24 and a third light-gathering element 23. In one possible embodiment, the light entrance of integrating light rod 24 is located at the second focal point of the reflective trough. The first and second focal points have been described in the previous embodiments, i.e., excitation light enters the reflective trough through the first focal point of the ellipse, and stimulated light exits the reflective trough through the second focal point of the ellipse.
Excitation light emitted by the excitation light generator 20 reaches the wavelength conversion material of the first focus after passing through the excitation light optical path component, the excitation light is converted into excited laser under the excitation of the wavelength conversion material, the excited laser is reflected to the reflection groove by the light splitting film layer on the light-transmitting substrate, is collected by the reflection groove and is output from the second focus, enters the light integrating rod 24 for light homogenization, and then is input to the optical-mechanical system.
The light source device provided by the embodiment of the invention has the same technical characteristics as the wavelength conversion device provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, and are used for convenience of description and simplicity of description only, and do not indicate or imply that the devices or elements indicated must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as meaning either a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working process of the system described above may refer to the corresponding process in the foregoing embodiment of the apparatus, and is not described herein again.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A wavelength conversion device is characterized by comprising a substrate, a wavelength conversion material and a reflecting groove, wherein the wavelength conversion material and the reflecting groove are fixedly arranged on the substrate;
the reflective trough and the wavelength conversion material are annular;
in the radial cross section of the ring, the reflection groove is a part of an ellipse, and the wavelength conversion material is positioned at any focus of the ellipse;
exciting light from a light source directly passes through the wavelength conversion material at the focal point to generate stimulated light, so that the stimulated light is reflected by the reflecting groove and then directly emitted from the other focal point of the reflecting groove, wherein no reflecting surface is arranged at the position of the wavelength conversion material.
2. The wavelength conversion device of claim 1, wherein the wavelength conversion material is disposed on a surface of the substrate.
3. The wavelength conversion device according to claim 2, wherein a light splitting film layer is disposed between the wavelength conversion material arrangement and the substrate;
the light splitting film layer transmits exciting light and reflects excited light.
4. The wavelength conversion device according to claim 2, wherein the substrate comprises a thermally conductive substrate and an annular light-transmissive substrate;
the light-transmitting substrate is fixedly connected with the heat-conducting substrate, and the wavelength conversion material is arranged on the surface of the light-transmitting substrate.
5. The wavelength conversion device according to claim 1, wherein the wavelength conversion material is a fluorescent plate material, and the fluorescent plate material is fixedly connected with the substrate.
6. The wavelength conversion device according to claim 5, wherein the light incident surface of the fluorescent plate is provided with a light splitting film layer;
the light splitting film layer transmits exciting light and reflects excited light.
7. The wavelength conversion device according to claim 1, further comprising a heat dissipation structure disposed on the substrate.
8. The wavelength conversion device of claim 1, further comprising an actuator coupled to the substrate.
9. A light source apparatus comprising an excitation light generator, an excitation light path component, an excited light path component, and a wavelength conversion device according to any one of claims 1 to 8;
the exciting light emitted by the exciting light generator is incident to the wavelength conversion device through the exciting light optical path component, the wavelength conversion device generates stimulated light, and the stimulated light is output through the stimulated light optical path component.
10. The light source apparatus of claim 9, wherein the stimulated light optical path component comprises a light integrating rod;
the exciting light enters the reflecting groove through the first focus of the ellipse, and the stimulated light exits the reflecting groove through the second focus of the ellipse;
the light entrance of the integrating light rod is located at the second focal point.
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| CN202010615589.1A CN111679424B (en) | 2020-06-29 | 2020-06-29 | Wavelength conversion device and light source equipment |
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| CN115248527A (en) * | 2021-04-26 | 2022-10-28 | 成都极米科技股份有限公司 | Light source device and projection equipment |
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| TWI513937B (en) * | 2014-10-02 | 2015-12-21 | Playnitride Inc | Optical module |
| KR102266738B1 (en) * | 2015-02-03 | 2021-06-17 | 엘지이노텍 주식회사 | Lighting apparatus |
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