CN106950785B - Light source device and lighting device - Google Patents
Light source device and lighting device Download PDFInfo
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- CN106950785B CN106950785B CN201610007855.6A CN201610007855A CN106950785B CN 106950785 B CN106950785 B CN 106950785B CN 201610007855 A CN201610007855 A CN 201610007855A CN 106950785 B CN106950785 B CN 106950785B
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
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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
- G03B21/208—Homogenising, shaping of the illumination light
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- Optics & Photonics (AREA)
- Multimedia (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Projection Apparatus (AREA)
- Semiconductor Lasers (AREA)
Abstract
The invention protects a light source device, comprising a laser light source and a light splitting device positioned on a laser light path, wherein the light splitting device transmits part of laser to form first laser and reflects part of laser to form second laser, a wavelength conversion device is positioned on the first light path and receives the first laser and converts at least part of the first laser into light with different wavelengths and then reflects the light back to the light splitting device, a scattering reflection device is positioned on the second light path and converts the second laser into second light with different light distributions and then reflects the second light back to the light splitting device, the light splitting device partially reflects the first light and partially transmits the second light, and the first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into a beam to be emitted. The light splitting device can emit the first light and the second light in any area on an emission light path, the adverse effect of the selective permeability of the light splitting device to laser and laser on the uniformity of final emitted light in the prior art is avoided, and the uniformity of the emitted light of the light source is improved.
Description
Technical Field
The present invention relates to the field of lighting, and in particular, to a light source device and a lighting device.
Background
At present, white light sources are widely used in the fields of illumination and projection display, and commonly used white light sources include LEDs, UHP bulbs, and the like, which provide uniform white light beams for use in the fields of illumination such as stage lamps, theater lamps, searchlights, and the like, and projectors represented by LCDs, LCOS, and DMDs. For an LED light source, the LED light source has good reliability and color performance, but is limited by large optical expansion, light beams are relatively divergent when being applied to the illumination field, and the brightness is limited when being applied to the projection field; for a bulb light source, the required optical effect can be realized, but the bottleneck is the problem of service life, and the service life of the bulb light source is only hundreds to one or two thousands of hours, which greatly limits the popularization of the application. With the development of the technology, the semiconductor laser is used as an excitation light source to excite the fluorescent powder as a light source, and the conventional illumination light source is gradually replaced.
However, in practical applications, when the laser and the fluorescence excited by the laser are combined, a problem of light uniformity often occurs, so that the color distribution of the emergent light is not uniform.
Disclosure of Invention
Aiming at the defect of poor color uniformity of the light source in the prior art, the invention provides a light source device with good uniformity and high brightness, which comprises the following components:
the laser device comprises a laser light source for emitting laser, a light splitting device and a light source control device, wherein the light splitting device is positioned on a laser light path, part of laser is transmitted by the light splitting device to form first laser, part of laser is reflected by the light splitting device to form second laser, the light path where the first laser is positioned is a first light path, and the light path where the second laser is positioned is a second light path; the wavelength conversion device is positioned on a first light path and used for receiving first laser and converting at least part of the first laser into light with different wavelengths to form first light to be emitted, the wavelength conversion device reflects the first light to the light splitting device, and the light splitting device partially reflects the first light; the scattering and reflecting device is positioned on the second light path and used for converting the second laser into second light with different light distributions and reflecting the second light to the light splitting device, and the light splitting device partially transmits the second light; the first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into a beam and emitted.
Preferably, the laser light source comprises a light shaping device, the light shaping device is positioned on a laser light path between the laser light source and the light splitting device, and the light shaping device sequentially comprises a convex lens, a concave lens and a scattering sheet along the laser light path.
Preferably, the light splitting means comprises two or more transparent sheets arranged in a stack.
Preferably, there is an air gap between the transparent sheets.
Preferably, the light splitting device includes a first transparent sheet, the first transparent sheet is a transparent sheet closest to the wavelength conversion device in each transparent sheet, the light splitting device further includes a filter film, the filter film is located on a surface of the first transparent sheet close to the wavelength conversion device, and the filter film transmits the laser and reflects the first light.
Preferably, the light splitting device includes a second transparent sheet, the second transparent sheet is the transparent sheet farthest from the wavelength conversion device, and the light splitting device further includes an antireflection film located on the surface of the second transparent sheet far from the wavelength conversion device.
Preferably, the light splitting device includes a first region that partially transmits the laser light and partially reflects the laser light, and a second region that reflects the first light and transmits the second light.
Preferably, the wavelength conversion means comprises a stationary phosphor patch or a rotatable phosphor wheel.
The invention also provides a light source device, which comprises a laser light source for emitting laser, and a light splitting device, wherein the light splitting device is positioned on the laser light path, reflects part of the laser to form first laser, and transmits part of the laser to form second laser; the wavelength conversion device is positioned on a first light path and used for receiving first laser and converting at least part of the first laser into light with different wavelengths to form first light to be emitted, the wavelength conversion device reflects the first light to the light splitting device, and the light splitting device partially transmits the first light; the scattering and reflecting device is positioned on the second light path and used for converting the second laser into second light with different light distributions and reflecting the second light to the light splitting device, and the light splitting device partially reflects the second light; the first light transmitted by the light splitting device and the second light reflected by the light splitting device are combined into a beam and emitted.
Preferably, the light splitting means comprises two or more transparent sheets arranged in a stack.
Preferably, the light splitting device includes a first region that partially transmits the laser light and partially reflects the laser light, and a second region that transmits the first light and reflects the second light.
The invention also provides a lighting device which comprises the light source device.
Compared with the prior art, the invention has the following beneficial effects:
the light splitting device capable of transmitting part of the laser and reflecting part of the laser is arranged on a laser light path, the laser is respectively guided to be incident to the wavelength conversion device and the scattering reflection device and is respectively converted into the first light and the second light, and the first light and the second light are combined and then emitted by the light splitting device, so that the first light and the second light can be emitted from any region of the light splitting device on an emission light path, the adverse effect of the selective permeability of the light splitting device on the laser and the laser on the uniformity of the final emitted light in the prior art is avoided, and the uniformity of the emitted light of the light source is improved.
Drawings
Fig. 1 is a schematic structural diagram of a light source device according to a first embodiment of the invention;
FIG. 2 is a schematic structural diagram of a light splitting device of a light source device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light source device according to a second embodiment of the invention;
FIG. 4 is a schematic structural diagram of a light splitting device of a light source device according to a second embodiment of the present invention;
fig. 5 is a schematic structural diagram of a light source device according to a third embodiment of the present invention;
fig. 6 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a light source device with good uniformity and high brightness, which comprises the following components: the laser device comprises a laser light source for emitting laser, a light splitting device and a light source control device, wherein the light splitting device is positioned on a laser light path, part of laser is transmitted by the light splitting device to form first laser, part of laser is reflected by the light splitting device to form second laser, the light path where the first laser is positioned is a first light path, and the light path where the second laser is positioned is a second light path; the wavelength conversion device is positioned on a first light path and used for receiving first laser and converting at least part of the first laser into light with different wavelengths to form first light to be emitted, the wavelength conversion device reflects the first light to the light splitting device, and the light splitting device partially reflects the first light; the scattering and reflecting device is positioned on the second light path and used for converting the second laser into second light with different light distributions and reflecting the second light to the light splitting device, and the light splitting device partially transmits the second light; the first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into a beam and emitted.
Unlike some prior art light splitting devices, the light splitting device of the present invention does not differentiate the region capable of transmitting laser light and reflecting laser light by disposing two different sub-regions on the portion, that is, the region achieves the effect of transmitting and reflecting laser light by using the same region with the same structure, and the spectral characteristics of the first laser light and the second laser light are substantially the same (the term "the same substrate" refers to the same in the detection error range). Therefore, the spectroscopic apparatus can emit light having the same spectrum as the laser light emitted from the laser light source in any region on the emission optical path. However, in the light splitting device in the prior art, some areas always cannot emit laser light, which causes an area with uneven color in the cross section of the whole emitted light, and causes great adverse effect on image display.
Therefore, the invention uses the special design of the light splitting device, not only uses wavelength selective characteristic light splitting, but also uses area selective characteristic geometric light splitting, so that part of laser is transmitted and part of laser is reflected, and finally the effect of uniform emergent light is achieved.
The embodiments of the present invention will be described in detail below with reference to the drawings and the embodiments.
Example one
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of the present invention. As shown in the figure, the light source device 100 includes a laser light source 101, a light splitting device 105, a wavelength conversion device 109, and a scattering reflection device 107. The laser light source 101 is used for emitting laser, the light splitting device 105 is located on a laser light path, the light splitting device 105 transmits part of the laser to form first laser, and reflects part of the laser to form second laser, the light path where the first laser is located is a first light path, and the light path where the second laser is located is a second light path. The wavelength conversion device 109 is located on the first optical path and configured to convert at least part of the first laser light into light with different wavelengths after receiving the first laser light to form first light for emission, and the scattering reflection device 107 is located on the second optical path and configured to convert the second laser light into second light with different light distributions. The wavelength conversion device 109 and the scattering reflection device 107 respectively reflect the first light and the second light to the light splitting device, the light splitting device 105 partially reflects the first light and partially transmits the second light, and the first light reflected by the light splitting device 105 and the second light transmitted by the light splitting device 105 are combined into one beam and emitted.
In this embodiment, the laser light source 101 may be a laser light source, a laser diode light source, or a light source composed of a laser diode array, and all the laser light sources applied in the prior art may be used as the laser light source of the present invention.
In this embodiment, the wavelength conversion device 109 is a reflective wavelength conversion device, that is, includes a wavelength conversion layer and a reflective layer, wherein the reflective layer is located on a surface of the wavelength conversion layer away from the light splitting device. The wavelength conversion layer of the wavelength conversion device 109 absorbs the first laser light and converts the first laser light into stimulated light of a wavelength different from that of the first laser light, and the stimulated light and the unabsorbed first laser light are reflected by the reflective layer and form first light emission (of course, the present invention also includes a case where the first laser light is completely absorbed and converted into the stimulated light). The wavelength conversion layer comprises fluorescent powder, phosphorescent materials and quantum dot luminescent materials. In this embodiment, the laser source is a blue light source, and the wavelength conversion device includes a yellow phosphor (e.g., YAG phosphor). Of course, in other embodiments of the present invention, laser sources in other wavelength ranges and wavelength conversion devices with other emission characteristics may be used, and the present invention is not limited to the embodiments described above.
In this embodiment, the scattering and reflecting device 107 changes the light distribution of the incident laser light, and converts the laser light with gaussian distribution into light with lambertian distribution, thereby improving the uniformity of the light and avoiding the occurrence of speckle after the light is emitted. The scattering and reflecting device 107 includes a scattering material layer including one or more of alumina, titania, barium sulfate, yttria, zirconia, and zinc oxide, and optionally a glass frit for bonding. The scattering material layer in this embodiment utilizes scattering particles close to the laser wavelength to scatter and reflect the second laser. In other embodiments of the present invention, the scattering and reflecting device 107 may also be a scattering surface with an uneven surface. In order to enhance the reflection performance of the scattering and reflecting device 107, a technical solution of stacking and combining a scattering and reflecting layer and a specular reflecting layer may also be used, and will not be described herein again.
In this embodiment, the wavelength conversion device 109 may be a stationary phosphor sheet, or may be a rotatable color wheel driven by a driving device such as a motor. The scattering and reflecting device 107 can also be a stationary scattering sheet or a rotatable scattering wheel, respectively.
In this embodiment, the laser light source 101 emits blue laser light, a part of the transmitted light splitting device is partially reflected by the light splitting device 105, the transmitted first blue laser light is converted into yellow light by the wavelength conversion device 109 and then returns to the light splitting device 105, and the reflected second blue laser light is reflected by the scattering reflection device 107 to form the second light return light splitting device 105. Finally, the yellow light reflected by the light splitting device 105 and the second blue light transmitted through the light splitting device 105 are combined to emit white light.
In this embodiment, the optical shaping device is further included, and is located on a laser light path between the laser light source 101 and the light splitting device 105, and the optical shaping device sequentially includes a convex lens 102, a concave lens 103, and a scattering sheet 104 along a laser light path direction. The convex lens 102 converges the laser beam emitted from the laser light source 101, and the converged laser beam is collimated by the concave lens 103 to obtain a beam with a reduced beam cross-sectional area. The compressed collimated light beam is homogenized by the diffuser 104, and the light spot incident on the wavelength conversion device 109 and the scattering reflection device 107 is approximately circular because the scattering property of the diffuser 104 is rotationally symmetrical. By the light shaping device, a round light spot with small divergence angle, uniform brightness and high brightness is obtained.
In this embodiment, the lighting device further includes a first focusing lens 108 located between the light splitting device 105 and the wavelength conversion device 109, the first focusing lens 108 further reduces the area of the light spot incident on the wavelength conversion device 109, the optical expansion amount of the light generated by the small light spot on the wavelength conversion device 109 is small, so that the divergence angle of the final emergent light is small, and the lighting device can meet the requirement of the light beam lighting device in the case that the light beam divergence angle of the light beam lighting device is small and the light energy is concentrated. Further, the light source device further comprises a second focusing lens 106 positioned between the light splitting device 105 and the scattering reflection device 107, the second focusing lens 106 further reduces the area of light spots incident on the scattering reflection device 107, the optical expansion amount of light generated by small light spots on the scattering reflection device 107 is small, the divergence angle of final emergent light is small, and the light source device can meet the requirements of the light beam illuminating lamp on the occasions of small light beam divergence angle and concentrated light energy of the light beam illuminating lamp.
In this embodiment, since the first laser light may not be completely absorbed by the wavelength conversion device 109, the first light may include both the stimulated light and the first laser light, and when the first light is reflected by the wavelength conversion device 109 back to the light splitting device 105, the first laser light in the first light will again generate a phenomenon of partially transmitting and partially reflecting, and a part of the first laser light will be lost. Since the number of the first laser light which is not absorbed per se is small, the emergent light is not greatly influenced. Similarly, when the second laser light converted into the second light with different light distribution by the scattering and reflecting device 107 is reflected back to the light splitting device 105, the second light is also partially transmitted and partially reflected. In practical applications, the white light requires a smaller proportion of blue light relative to yellow light, and requires about 85% of light to be transmitted to form the first laser light and 15% of light to be reflected to form the second laser light when the light splitting device 105 splits the light for the first time. In the rough model without considering the light loss, 15% of the second laser light is reflected by the scattering and reflecting device 107 and then incident on the light splitting device 105 again, 85% of the second laser light is transmitted, and then the lost light only accounts for 2.25% of the original laser light source, and the light loss is not obviously inferior to the technical scheme of digging holes on the light splitting sheet in the prior art. Since the light splitting device 105 is uniform as a whole, the first light reflected by the light splitting device 105 and the second light transmitted by the light splitting device are respectively uniform in light distribution, and the combined light is also uniform in color.
In this embodiment, the light splitting device includes two or more transparent sheets stacked in layers. Referring to fig. 2, fig. 2 is a schematic structural diagram of the light splitting device 105 of the present embodiment. The light splitting device 105 in fig. 2 comprises two transparent sheets 1051 and 1052. When laser is incident on the transparent sheet, reflection and refraction actions simultaneously occur on each surface of the transparent sheet, namely the transmissivity of the transparent sheet to the laser is not 100%, and the light splitting is not realized by utilizing the wavelength characteristic difference of light beams or utilizing different transmission (for example, a hollow-out area is arranged) of different areas of the light splitting device. The light that is finally transmitted through the two transparent sheets is the first laser light, and the light that is finally reflected is the second laser light.
The invention utilizes two or more than two transparent sheets which are arranged in a stacked mode, namely the superposition of the functions of the transparent sheets for partially reflecting light, and correspondingly, under the condition that the quality of the transparent sheet is not changed, the more the number of the transparent sheets is, the more the reflected light is, and the smaller the ratio of the luminous fluxes of the first laser light to the second laser light is. In this way, the ratio of the first laser light to the second laser light can be simply adjusted.
In this embodiment, an air gap is provided between the transparent sheet 1051 and the transparent sheet 1052, and this air gap causes a phenomenon of reflection and refraction due to a difference in refractive index between the front and rear of the interface when light exits from the transparent sheet 1052 and enters the transparent sheet 1051. If the transparent sheet 1051 and the transparent sheet 1052 are directly attached, it is possible that light is transmitted directly from the transparent sheet 1052 into the transparent sheet 1051 without reflection and refraction, and the transparent sheet 1051 and the transparent sheet 1052 at this time are equivalent to one transparent sheet, which results in a great reduction in the transmission and reflection functions of the light splitting device 105. In some cases, the present invention may also use only one transparent sheet as the light splitting device, which will impose requirements on the material and internal structure of the transparent sheet, because it is difficult to obtain a light splitting device with proper transmittance and reflectance by a single transparent sheet, such specific technology is out of the discussed scope of the present invention, and the technical solution of using the material and internal structure and the technical solution of stacking a plurality of transparent sheets of the present embodiment are two different sub-technical solutions, both of which can be included in the inventive concept of the present invention.
In this embodiment, as shown in fig. 2, the light splitting device 105 further includes a filter 1053 and an anti-reflection film 1054. Wherein the filter 1053 is located on the surface of the first transparent sheet 1051, the first transparent sheet 1051 is the transparent sheet closest to the wavelength conversion device 109, and the filter 1053 is located on the surface of the first transparent sheet 1051 close to the wavelength conversion device 109; antireflection film 1054 is disposed on a surface of second transparent sheet 1052, second transparent sheet 1052 being the one of the transparent sheets furthest from wavelength conversion device 109, and antireflection film 1054 being disposed on a surface of the second transparent sheet remote from wavelength conversion device 109.
In this embodiment, the filter 1053 can transmit the laser light, so that the first laser light enters the wavelength conversion device 109 through the light splitting device, and the filter 1053 can reflect the first light emitted from the wavelength conversion device 109 and guide the first light to the emission light path.
In this embodiment, the antireflection film 1054 enhances the transmission performance of the laser, and adjusts the laser transmission reflectance of the light splitting device 105, so that the ratio of the first light to the second light in the emergent light is controllable. In the present invention, it is preferable to add an antireflection film 1054, so that the functions of transmission and reflection can be realized even if the light splitting device 105 has no antireflection film.
Example two
Referring to fig. 3, fig. 3 is a schematic structural diagram of a light source device according to a second embodiment of the present invention, and the light source device 200 includes a laser light source 201, a light splitting device 205, a wavelength conversion device 209, and a scattering reflection device 207. The present embodiment is different from the first embodiment in that the light splitting device 205 is slightly different from the light splitting device 105 in the first embodiment.
Fig. 4 is a schematic structural diagram of a light splitting device 205 of a light source device 200 according to a second embodiment of the present invention. The light splitting device 205 includes a first region 2051 and a second region 2052. The first regions 2051 partially transmit laser light and partially reflect laser light, and the second regions 2052 reflect first light and transmit second light.
In this embodiment, the first region 2051 of the light splitting device 205 is the same as the light splitting device 105 in the first embodiment, and the structure and function thereof can refer to the description of the light splitting device 105 in the above embodiment. That is, the first region 2051 of the light splitting device 205 of this embodiment may also include two or more transparent sheets stacked together, an air gap is provided between the transparent sheets, and the first region 2051 may further include a filter film and an antireflection film.
In this embodiment, the second region 2052 is a region where light is combined by using wavelength characteristics. A first light (e.g., yellow light) from the wavelength conversion device 209 and a second light (e.g., blue light) from the scattering and reflecting device 207 are respectively incident from both sides of the second region 2052, the first light is reflected, and the second light is transmitted, so that the two lights are combined into one and exit.
In the first embodiment, the light splitting device 105 has only one uniform region, and in the present embodiment, the area of the first region 2051 is reduced relative to the light splitting device 105, and the second region 2052 is disposed around the first region 2051.
First, the laser generated by the laser source 201 is shaped by the light shaping device and then enters the first region 2051, but not the second region 2052, which greatly reduces the cross-sectional area of the light beam and facilitates the generation of small light spots on the wavelength conversion device 109.
Next, as described in the first embodiment, the second light is lost at the light splitting device 105, and in this embodiment, the second light is reflected by the scattering and reflecting device 207 to cover the first region 2051 and the second region 2052, wherein the second light incident on the first region 2051 generates the same light loss ratio as that in the first embodiment, and the second light incident on the second region 2052 has higher transmittance, so that the light loss of the second light is reduced.
The design of the second embodiment is more complicated than that of the first embodiment, but the second embodiment also has the beneficial effects of reducing light loss and the like.
EXAMPLE III
Referring to fig. 5, fig. 5 is a schematic structural diagram of a light source device according to a third embodiment of the present invention. The present embodiment is different from the first embodiment in that the positions of the wavelength conversion device and the scattering reflection device are exchanged.
The light source device 300 of the present embodiment includes a laser light source 301, a light splitting device 305, a wavelength conversion device 309, and a scattering reflection device 307. The laser light source 301 is configured to emit laser light, the light splitting device 305 is located on a laser light path, the light splitting device 305 reflects a part of the laser light to form a first laser light, and transmits a part of the laser light to form a second laser light, where the light path where the first laser light is located is a first light path, and the light path where the second laser light is located is a second light path. The wavelength conversion device 309 is located on the first optical path, and is configured to convert at least part of the first laser light into light with different wavelengths after receiving the first laser light to form first light for emission, and the scattering reflection device 307 is located on the second optical path, and is configured to convert the second laser light into second light with different light distributions. The wavelength conversion device 309 and the scattering reflection device 307 respectively reflect the first light and the second light to the light splitting device, the light splitting device 305 partially transmits the first light and partially reflects the second light, and the first light transmitted by the light splitting device 305 and the second light reflected by the light splitting device 305 are combined into one beam to be emitted.
The transmission and reflection characteristics of the light splitting device 305 of the present embodiment are exactly opposite to those of the light splitting device 105 of the first embodiment. In this embodiment, the light splitting device 305 includes two or more transparent sheets stacked. In practical applications, more laser light is required to be reflected to the wavelength conversion device 309, and the number of transparent sheets of the light splitting device 305 is much larger than that of the first embodiment. This will cause problems of increased light loss (light absorption cannot be 0), large structure volume, and increased light path misalignment (light path shift due to refraction), which are not within the scope of the present invention, and will not affect the effect of the present invention to improve the color uniformity of the outgoing light.
For the description of other components in this embodiment, please refer to the description of the first embodiment, which is not repeated herein.
Example four
Referring to fig. 6, fig. 6 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention. The present embodiment is different from the second embodiment in that the positions of the wavelength conversion device and the scattering reflection device are exchanged.
The light source device 400 of the present embodiment includes a laser light source 401, a light splitting device 405, a wavelength conversion device 409, and a scattering reflection device 407. The laser light source 401 is used for emitting laser, the light splitting device 405 is located on a laser light path, the light splitting device 405 reflects part of the laser light to form first laser light, and transmits part of the laser light to form second laser light, the light path where the first laser light is located is a first light path, and the light path where the second laser light is located is a second light path. The wavelength conversion device 409 is located on the first optical path and configured to convert at least part of the first laser light into light with different wavelengths after receiving the first laser light to form first light for emission, and the scattering reflection device 407 is located on the second optical path and configured to convert the second laser light into second light with different light distributions. The wavelength conversion device 409 and the scattering reflection device 407 respectively reflect the first light and the second light to the light splitting device, the light splitting device 405 partially transmits the first light and partially reflects the second light, and the first light transmitted by the light splitting device 405 and the second light reflected by the light splitting device 405 are combined into one beam to be emitted.
Like the embodiment, the light splitting device 405 of the present embodiment also includes two regions, in which the first region transmits part of the laser light and reflects part of the laser light, and the second region transmits the first light and reflects the second light.
As described in the fifth embodiment, this embodiment also needs more laser light to be reflected by the first region to the wavelength conversion device 409, and the number of the required transparent sheets is larger than that of the second embodiment without changing the material of the transparent sheets. However, the area of the first region in this embodiment is smaller than the area of the light splitting device 305 in the fifth embodiment, and therefore the problems of the structure, such as the large volume and the optical path misalignment, described in the fifth embodiment are not too serious in this embodiment.
For the description of other components in this embodiment, please refer to the description of embodiment two, which is not repeated herein.
Still another embodiment of the present invention further provides an illumination device, including the light source device according to any of the above embodiments, and further including a lens group and other components disposed on an optical path of outgoing light from the light splitting device.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A light source device comprising a laser light source for emitting laser light, characterized in that:
the light splitting device is positioned on a laser light path, part of laser light is transmitted by the light splitting device to form first laser light, part of laser light is reflected by the light splitting device to form second laser light, the light path where the first laser light is located is a first light path, the light path where the second laser light is located is a second light path, the light splitting device comprises two or more than two transparent sheets which are arranged in a stacked mode, the light splitting device utilizes the characteristic that the transparent sheets reflect and refract light simultaneously and function superposition, and under the condition that the quality of the transparent sheets is unchanged, the proportion of the first laser light and the second laser light is adjusted by adjusting the number of the transparent sheets;
the wavelength conversion device is positioned on the first light path and used for receiving first laser and converting at least part of the first laser into light with different wavelengths to form first light to be emitted, the wavelength conversion device reflects the first light to the light splitting device, and the light splitting device partially reflects the first light;
the scattering and reflecting device is positioned on the second light path and used for converting the second laser into second light with different light distributions and reflecting the second light to the light splitting device, and the light splitting device partially transmits the second light;
the first light reflected by the light splitting device and the second light transmitted by the light splitting device are combined into a beam and emitted.
2. The light source device according to claim 1, comprising a light shaping device, located on a laser light path between the laser light source and the light splitting device, wherein the light shaping device comprises a convex lens, a concave lens and a scattering sheet in sequence along the laser light path.
3. The light source device of claim 1, wherein an air gap is provided between the transparent sheets.
4. The light source device according to claim 1, wherein the light splitting device includes a first transparent plate, the first transparent plate is a closest transparent plate of the transparent plates to the wavelength conversion device, the light splitting device further includes a filter film disposed on a surface of the first transparent plate close to the wavelength conversion device, and the filter film transmits the laser light and reflects the first light.
5. The light source device according to claim 1, wherein the light splitting device includes a second transparent plate, the second transparent plate is a transparent plate farthest from the wavelength conversion device in each of the transparent plates, and the light splitting device further includes an antireflection film on a surface of the second transparent plate far from the wavelength conversion device.
6. The light source device of claim 1, wherein the wavelength conversion device comprises a stationary phosphor patch or a rotatable color wheel.
7. A light source device comprising a laser light source for emitting laser light, characterized in that:
the light splitting device is positioned on a laser light path, part of laser is reflected by the light splitting device to form first laser, part of laser is transmitted by the light splitting device to form second laser, the light path where the first laser is positioned is a first light path, the light path where the second laser is positioned is a second light path, the light splitting device comprises two or more than two transparent sheets which are arranged in a stacked mode, the light splitting device utilizes the characteristic that the transparent sheets reflect and refract light simultaneously and function superposition, and under the condition that the quality of the transparent sheets is unchanged, the proportion of the first laser to the second laser is adjusted by adjusting the number of the transparent sheets;
the wavelength conversion device is positioned on the first light path and used for receiving first laser and converting at least part of the first laser into light with different wavelengths to form first light to be emitted, the wavelength conversion device reflects the first light to the light splitting device, and the light splitting device partially transmits the first light;
the scattering and reflecting device is positioned on the second light path and used for converting the second laser into second light with different light distributions and reflecting the second light to the light splitting device, and the light splitting device partially reflects the second light;
the first light transmitted by the light splitting device and the second light reflected by the light splitting device are combined into a beam and emitted.
8. A lighting device comprising the light source device according to any one of claims 1 to 7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610007855.6A CN106950785B (en) | 2016-01-07 | 2016-01-07 | Light source device and lighting device |
| PCT/CN2016/111694 WO2017118300A1 (en) | 2016-01-07 | 2016-12-23 | Light source device and illumination device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610007855.6A CN106950785B (en) | 2016-01-07 | 2016-01-07 | Light source device and lighting device |
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| CN106950785A CN106950785A (en) | 2017-07-14 |
| CN106950785B true CN106950785B (en) | 2020-10-16 |
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| WO2019130520A1 (en) * | 2017-12-27 | 2019-07-04 | マクセル株式会社 | Projector |
| CN110764172A (en) * | 2018-07-26 | 2020-02-07 | 无锡视美乐激光显示科技有限公司 | Diffusion filter, laser light source device and projector thereof |
| CN111856859B (en) * | 2019-04-24 | 2023-03-10 | 深圳光峰科技股份有限公司 | Light source system and display device |
| JP7484448B2 (en) | 2020-06-04 | 2024-05-16 | セイコーエプソン株式会社 | Lighting equipment and projectors |
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| CN1646951A (en) * | 2002-04-01 | 2005-07-27 | 松下电器产业株式会社 | Dichroic mirror and projection type display unit |
| CN101430389A (en) * | 2007-11-06 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Membrane stack structure of blue light splitting piece |
| CN101614832A (en) * | 2008-06-24 | 2009-12-30 | 鸿富锦精密工业（深圳）有限公司 | Film stacking structure |
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| JP5874058B2 (en) * | 2010-12-06 | 2016-03-01 | パナソニックＩｐマネジメント株式会社 | Light source device and projection display device |
| CN102563410B (en) * | 2011-12-04 | 2014-08-06 | 深圳市光峰光电技术有限公司 | Light emitting device, projection device and lighting device |
| CN103913936B (en) * | 2012-12-28 | 2016-12-07 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and optical projection system |
| CN107632487B (en) * | 2013-04-20 | 2020-03-24 | 深圳光峰科技股份有限公司 | Light emitting device and related light source system |
| CN203311091U (en) * | 2013-05-31 | 2013-11-27 | 京东方科技集团股份有限公司 | Optical device, backlight source and display device |
| CN104482504A (en) * | 2014-11-29 | 2015-04-01 | 杨毅 | Light-emitting device and illumination device |
| CN104460008B (en) * | 2014-11-29 | 2017-06-06 | 杨毅 | Light-emitting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1646951A (en) * | 2002-04-01 | 2005-07-27 | 松下电器产业株式会社 | Dichroic mirror and projection type display unit |
| CN101430389A (en) * | 2007-11-06 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Membrane stack structure of blue light splitting piece |
| CN101614832A (en) * | 2008-06-24 | 2009-12-30 | 鸿富锦精密工业（深圳）有限公司 | Film stacking structure |
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| CN106950785A (en) | 2017-07-14 |
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