CN111796432A - Light source device, display apparatus, and illumination device - Google Patents
Light source device, display apparatus, and illumination device Download PDFInfo
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- CN111796432A CN111796432A CN202010273959.8A CN202010273959A CN111796432A CN 111796432 A CN111796432 A CN 111796432A CN 202010273959 A CN202010273959 A CN 202010273959A CN 111796432 A CN111796432 A CN 111796432A
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- G—PHYSICS
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- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/48—Laser speckle optics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0916—Adapting the beam shape of a semiconductor light source such as a laser diode or an LED, e.g. for efficiently coupling into optical fibers
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/09—Beam shaping, e.g. changing the cross-sectional area, not otherwise provided for
- G02B27/0938—Using specific optical elements
- G02B27/0977—Reflective elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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Abstract
The present invention provides a light source device, a display apparatus, and an illumination device, the light source device including: a first light source assembly for emitting a laser beam; a second light source assembly for emitting broad spectrum fluorescence; a coupling assembly for coupling the laser beam and the broad spectrum fluorescence into a first beam; the first converging component is used for converging the first light beam into a second light beam; the optical rod is used for carrying out shimming shaping treatment on the second light beam; wherein the coupling assembly is located between the first light source assembly and the first converging assembly; the coupling assembly is provided with a light-transmitting window, and the laser beam is incident to the first convergence assembly after passing through the light-transmitting window and being coupled with the broad-spectrum fluorescence reflected by the coupling assembly into the first beam. According to the technical scheme, a special-shaped light bar is not needed, and the light energy utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of laser application, in particular to a light source device, display equipment and a lighting device.
Background
The laser has the characteristics of high brightness, small wavelength width, small optical expansion and the like, and has wide application prospect in the laser display field and the laser illumination field.
Laser spectroscopy has many advantages, but it suffers from the problems of speckle and low display index, which can be solved by coupling with broad-spectrum fluorescence. In the prior art, when the laser beam and the broad spectrum fluorescence are coupled for use, partial light waves are wasted.
Disclosure of Invention
In view of the above, the present invention provides a light source device, a display apparatus, and an illumination device, thereby improving the efficiency of light energy utilization.
In order to achieve the above purpose, the invention provides the following technical scheme:
a light source apparatus, the light source apparatus comprising:
a first light source assembly for emitting a laser beam;
a second light source assembly for emitting broad spectrum fluorescence;
a coupling assembly for coupling the laser beam and the broad spectrum fluorescence into a first beam;
the first converging component is used for converging the first light beam into a second light beam;
a light bar for shimming and shaping the second light beam;
wherein the coupling assembly is located between the first light source assembly and the first converging assembly; the coupling assembly is provided with a light-transmitting window, and the laser beam is incident to the first convergence assembly after passing through the light-transmitting window and being coupled with the broad-spectrum fluorescence reflected by the coupling assembly into the first beam.
Preferably, in the above light source device, the coupling member includes a transparent substrate, and a surface of the transparent substrate has a reflective film;
the reflecting film exposes the transparent substrate of the light-transmitting window area, or the transparent substrate is provided with a through hole corresponding to the area of the light-transmitting window.
Preferably, in the above light source device, the coupling member includes a first reflective element and a second reflective element, and a gap is formed between the first reflective element and the second reflective element; a portion of the broad spectrum fluorescent light is reflected by the first reflective element and another portion of the broad spectrum fluorescent light is reflected by the second reflective element;
after the laser beam passes through the gap, the laser beam is coupled with the broad spectrum fluorescence reflected by the first reflecting element and the second reflecting element to be the first beam and then enters the first convergence assembly.
Preferably, in the above light source device, a first lens assembly is provided between the first light source assembly and the coupling assembly, and is used for adjusting the spot size of the laser beam;
and/or a second lens component is arranged between the coupling component and the first convergence component and is used for adjusting the spot size of the laser beam and the spot size of the broad spectrum fluorescence.
Preferably, in the above light source device, the first converging component and the light rod have the same optical axis;
the emitting direction of the laser beam is parallel to the optical axis, and the emitting direction of the broad spectrum fluorescence is perpendicular to the optical axis.
Preferably, in the above light source device, the second light source unit includes: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescent light based on the preset color laser light.
Preferably, in the light source device, the fluorescent element is a phosphor of a ceramic fluorescent material, a crystal fluorescent material, or an inorganic paste mixed with a phosphor.
Preferably, in the above light source device, the laser beam includes one or more of a red laser beam, a green laser beam, and a blue laser beam;
the broad spectrum fluorescence comprises at least a portion of visible light;
the laser beam and the broad spectrum fluorescence have overlapped wave bands, and the spectral width of the continuous spectrum including the overlapped wave bands in the laser beam is smaller than the spectral width of the continuous spectrum including the overlapped wave bands in the broad spectrum fluorescence.
The invention also provides a display device which comprises the light source device.
The invention also provides a lighting device which comprises the light source device.
As can be seen from the above description, in the light source device, the display device and the illumination device provided in the technical solution of the present invention, the coupling component is located between the first light source component and the first convergence component, wherein the coupling component has a light-transmitting window, the laser beam emitted from the first light source component is coupled with the broad-spectrum fluorescence reflected by the coupling component through the light-transmitting window to form a first beam, and then the first beam is incident to the first convergence component, and the first convergence component converges the first beam to form a second beam, and the second beam is incident to the light rod to perform shimming and shaping processing, so that the light energy utilization rate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
The structure, proportion, size and the like shown in the drawings are only used for matching with the content disclosed in the specification, so that the person skilled in the art can understand and read the description, and the description is not used for limiting the limit condition of the implementation of the invention, so the method has no technical essence, and any structural modification, proportion relation change or size adjustment still falls within the scope of the technical content disclosed by the invention without affecting the effect and the achievable purpose of the invention.
FIG. 1 is a light path diagram of a conventional light source device;
FIG. 2 is a schematic structural diagram of the element 3 in FIG. 1;
FIG. 3 is a light path diagram of another conventional light source device;
fig. 4 is a light path diagram of still another conventional light source device;
fig. 5 is a light path diagram of still another conventional light source device;
fig. 6 is a light path diagram of a light source device according to an embodiment of the present invention;
FIG. 7 is a spectrum of broad spectrum fluorescence provided by an embodiment of the present invention;
FIG. 8 is a diagram of a laser beam spectrum provided by an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a coupling assembly according to an embodiment of the present invention;
FIG. 10 is a sectional view in the direction P-P' of FIG. 9;
FIG. 11 is another sectional view in the direction P-P' of FIG. 9;
fig. 12 is a light path diagram of another light source device provided in the embodiment of the present invention;
fig. 13 is a light path diagram of another light source device according to an embodiment of the present invention;
fig. 14 is a light path diagram of another light source device according to an embodiment of the present invention.
Detailed Description
The embodiments of the present application will be described in detail and fully with reference to the accompanying drawings, wherein the description is only for the purpose of illustrating the embodiments of the present application and is not intended to limit the scope of the 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 application.
Referring to fig. 1 and 2, fig. 1 is a light path diagram of a conventional light source device, and fig. 2 is a schematic structural diagram of an element 3 in fig. 1. As shown in fig. 1, the light sources 1-1 to 1-4 are RGB laser light sources, which are coupled and shaped inside the light source module, where the output light is parallel light, the number of the light sources can be increased or decreased according to actual needs, and the wavelength range is B (blue light): 440-470 nm, G (green): 520-540 nm, R (red light): 630-650 nm, the element 2 is a plano-convex lens for converging the parallel light emitted by the light sources 1-4, the element 3 is a special-shaped solid light bar (as shown in fig. 2), the element 4 is a plano-convex lens for converging the parallel light output by the light source 5, wherein the light source 5 is a broad spectrum fluorescent light, such as a fluorescent light excited by bombarding different fluorescent materials with laser, or a broad spectrum LED light source, but not limited to these two light sources, the light source is coupled and shaped inside the light source module, the output light is parallel light, and the fluorescence spectrum commonly used in the display field is 470-780 nm.
As shown in fig. 2, the S1 surface is an oblique angle surface, a reflection film is plated, the S2 surface is plated with an antireflection film, the antireflection wavelength corresponds to a wavelength band included in the light sources 1-1 to 1-4, the S3 surface is plated with an antireflection film in a designated area (indicated by a dotted oval in fig. 2), the antireflection wavelength corresponds to a wavelength band included in the light source 5, the S4 surface is plated with an antireflection film, the wavelength corresponds to a wavelength band included in the system, and the other surfaces are not plated with films. When the acute angle between the S1 surface and the S2 surface is 45 degrees, the shimming effect is good, in addition, the size of the designated coating area of the S3 surface can be determined according to the size of the incident light spot, and the coating area is larger than the incident light spot. The light source is not limited to parallel light or non-parallel light, if the element 2 and the element 4 are contained in the light source part as a whole, the light becomes convergent light, the light path positions of the light sources 1-1 to 1-4 and the light source 5 can be interchanged, and the coating film is changed correspondingly.
In the mode shown in fig. 1, the mixed color laser light output by the light sources 1-1 to 1-4 is parallel light, passes through the element 2, is converged, passes through the S2 surface of the element 3, and enters the element 3; and on the other path, the broad-spectrum parallel light output by the light source 5 passes through the element 4, after light rays are converged, the light rays are projected into the S1 reflecting surface through the designated area of the S3 surface of the element 3, the light rays of the light sources 1-4 and the light source 5 are continuously internally reflected in the element 3 to play a role of shimming, and finally are emitted through the S4 surface of the element 3.
In the mode shown in fig. 1 and fig. 2, although the efficient coupling of the two light sources can be realized, and the waste of light waves is avoided, the two light sources are poor in fusion and poor in shimming, and a special-shaped solid light rod is required to be arranged as the element 3, so that the alignment installation difficulty of the system and the structural complexity of the device are increased.
Referring to fig. 3 and 4, fig. 3 is a light path diagram of another conventional light source device, and fig. 4 is a light path diagram of still another conventional light source device. Fig. 3 and 4 are based on the optimization of the element 3 in fig. 1, and the element 3 is changed into a combination of a plurality of optical rods, such as a 3-1 combination scheme in fig. 3 and a 3-2 combination scheme in fig. 4, or other schemes for changing positions or angles.
As shown in FIG. 3, the combination 3-1 comprises a single wedge-shaped light bar 7 and two rectangular light bars 6 and 8, wherein the incident end and the emergent end of the light bar 6 are coated with antireflection films with corresponding wave bands, the wedge-shaped surface of the light bar 7 is coated with a reflection film, the incident area and the emergent surface are coated with antireflection films, and the incident end and the emergent end of the light bar 8 are coated with antireflection films. The length and width of the combination of the emergent surfaces of the light bar 6 and the light bar 7 are less than or equal to the length and width of the incident end of the light bar 8.
In the mode shown in FIG. 3, the mixed color laser light output by the light sources 1-1 to 1-4 is parallel light, passes through the element 2, is converged, passes through the light rod 6, and enters the light rod 8; in the other path, the wide-spectrum parallel light output by the light source 5 passes through the element 4, is converged, is projected into the wedge-shaped surface of the light rod 7 through the incident area of the light rod 7, and enters the light rod 8 after being reflected. The light rays of the light sources 1-1 to 1-4 and the light source 5 are continuously internally reflected in the light bar 8 to play a role of shimming, and finally are emitted out through the emergent end of the light bar 8.
As shown in fig. 4, the 3-2 combination consists of a double wedge shaped light bar 9 and two cuboid light bars 6 and 8. Wherein, the incident end and the emergent end of the light rod 6 are plated with antireflection films with corresponding wave bands, the incident end and the emergent end of the light rod 8 are plated with antireflection films, two surfaces of the double wedge-shaped light rod 9 are plated with reflection films in a wedge shape, and the incident area and the emergent area are plated with antireflection films. The length and width of the combination of the emergent surfaces of the light bar 6 and the light bar 9 are less than or equal to 8.
In the mode shown in fig. 4, the mixed color laser output by the light sources 1-1 to 1-4 is parallel light, and after converging through the element 2, the light enters the light rod 9 through the incident end of the light rod 9, and enters the light rod 8 through the emergent end of the light rod 9; in the other path, the broad spectrum parallel light output by the light source 5 passes through the element 4, is converged, passes through the light bar 6 and enters the light bar 8. The light rays of the light sources 1-1 to 1-4 and the light source 5 are continuously internally reflected in the light bar 8 to play a role of shimming, and finally are emitted out through the emergent end of the light bar 8.
Similarly, in the two modes shown in fig. 3 and fig. 4, although efficient coupling of the two light sources can be realized, and waste of light waves is avoided, there are problems that the two light sources are poor in fusion, shimming is not good, and special-shaped solid light rods need to be arranged, so that alignment installation difficulty of the system and structural complexity of devices are increased, the structure is complex, and cost is high.
In summary, in the conventional technologies shown in fig. 1 to 4, a special-shaped optical rod is required to be used, which results in problems of difficulty in alignment and installation of the system, complexity of the device structure, complex structure, and high cost. Moreover, the two light sources are respectively incident on different regions of the coupling element, such as different regions on the same side of the incident element 3 of the two light sources in the modes of fig. 1 and 2, and such as different regions on the same side of the incident optical rod 8 of the two light sources in the modes of fig. 3 and 4, which may result in poor fusion and poor shimming between the laser light source and the broad spectrum light source.
In order to avoid using a special-shaped light bar and improve the coupling uniformity of the light source, the method shown in fig. 5 can be used.
Referring to fig. 5, fig. 5 is a light path diagram of still another conventional light source device. As shown in fig. 5, the light sources 1-1 to 1-4 are RGB laser light sources, the light sources are coupled and shaped inside the light source module, where the output light is parallel light, the number of the light sources can be increased or decreased according to actual needs, and the wavelength range is B: 440-470 nm, G: 520-540 nm, R: 630-650 nm, elements 1-5 are yellow-reflecting red-green-blue-transmitting beam combining mirrors, RGB light emitted by light sources 1-4 is transmitted, part of light emitted by light sources 1-6 is reflected, loss of spectrum projection overlapped with RG is caused, elements 1-7 are plano-convex lenses, mixed light is converged, elements 1-8 are light rods, and the mixed light enters the light rods for shimming after being converged. The light source 1-6 is wide spectrum fluorescence, such as fluorescence excited by laser bombarding different fluorescent materials, and the output light is parallel light through coupling, shaping and the like in the light source module, and the fluorescence spectrum commonly used in the display field is 470 nm-780 nm.
In the mode shown in fig. 5, the two light sources can be coupled before being incident into the element 1-8 by using the element 1-5, so that the coupling uniformity of the two light sources is improved, and the shimming effect is improved, but because the wave bands of the light sources 1-4 and the light sources 1-6 have overlapping portions, only one of the light sources 1-4 or the light sources 1-6 can enter the element 1-8 corresponding to the overlapping portion, and the other light source corresponding to the overlapping portion is wasted, so that a part of the light energy of the overlapping portion is lost, and therefore, the efficiency is low, and the energy utilization rate of the broad spectrum fluorescence is only about 30%.
Therefore, in order to solve the above-mentioned problems, an embodiment of the present invention provides a light source device, a display apparatus, and an illumination device, the light source device including:
a first light source assembly for emitting a laser beam;
a second light source assembly for emitting broad spectrum fluorescence;
a coupling assembly for coupling the laser beam and the broad spectrum fluorescence into a first beam;
the first converging component is used for converging the first light beam into a second light beam;
a light bar for shimming and shaping the second light beam;
wherein the coupling assembly is located between the first light source assembly and the first converging assembly; the coupling assembly is provided with a light-transmitting window, and the laser beam is incident to the first convergence assembly after passing through the light-transmitting window and being coupled with the broad-spectrum fluorescence reflected by the coupling assembly into the first beam.
Therefore, in the light source device, the display device and the illumination device provided by the technical scheme of the invention, the coupling assembly is positioned between the first light source assembly and the first convergence assembly, the coupling assembly is provided with the light-transmitting window, the laser beam emitted by the first light source assembly is coupled with the broad-spectrum fluorescence reflected by the coupling assembly through the light-transmitting window to form the first light beam, and then the first light beam is incident to the first convergence assembly, the first convergence assembly converges the first light beam to form the second light beam, and the second light beam is incident to the light bar to be subjected to shimming and shaping treatment, so that the light energy utilization rate is improved.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, the present application is described in further detail with reference to the accompanying drawings and the detailed description.
Referring to fig. 6, fig. 6 is a light path diagram of a light source device according to an embodiment of the present invention. As shown in fig. 6, the light source device includes:
the first light source component 2-1, the first light source component 2-1 is used for emitting laser beams; the second light source component 2-7 is used for emitting wide-spectrum fluorescence, and the second light source component 2-7 is used for emitting wide-spectrum fluorescence; a coupling assembly 2-6, the coupling assembly 2-6 to couple the laser beam and the broad spectrum fluorescence into a first beam; the first convergence component 2-8 is used for converging the first light beam into a second light beam by the first convergence component 2-8; the optical rods 2-9 are used for carrying out shimming shaping treatment on the second light beams, and the optical rods 2-9 are used for carrying out shimming shaping treatment on the second light beams; wherein the coupling component 2-6 is located between the first light source component 2-1 and the first converging component 2-8; the coupling components 2-6 are provided with light-transmitting windows, and the laser beams are incident to the first convergence components 2-8 after passing through the light-transmitting windows and being coupled with the broad spectrum fluorescence reflected by the coupling components 2-6 into the first beam. Wherein, the coupling components 2-6 and the emergent light ray directions of the two light source components all have an included angle of 45 degrees.
As shown in fig. 6, the first converging component 2-8 is coaxial with the light bar 2-9; the emitting direction of the laser beam is parallel to the optical axis, and the emitting direction of the broad spectrum fluorescence is perpendicular to the optical axis. In another embodiment, the emission direction of the laser beam may be perpendicular to the optical axis, and the emission direction of the broad spectrum fluorescence may be parallel to the optical axis.
Optionally, the second light source assembly 2-7 comprises: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescent light based on the preset color laser light.
The fluorescent element can be a ceramic fluorescent material, a crystal fluorescent material or a phosphor of inorganic glue mixed fluorescent powder.
It should be noted that the preset color laser emitted by the laser light source can be set based on the requirement, and the visible light with the required color can be obtained by selectively setting the laser emission color and the phosphor material.
In the embodiment of the invention, the laser beam comprises one or more of red laser, green laser and blue laser; the broad spectrum fluorescence comprises at least part of the visible light, for example may comprise the entire visible light spectrum; the laser beam and the broad spectrum fluorescence have overlapped wave bands, and the spectral width of the continuous spectrum including the overlapped wave bands in the laser beam is smaller than the spectral width of the continuous spectrum including the overlapped wave bands in the broad spectrum fluorescence.
If the overlapping wavelength band of the laser beam and the broad spectrum fluorescence is red light, the width of the red wavelength band in the laser beam is smaller than that of the red wavelength band in the broad spectrum fluorescence. If the overlapping wavelength band of the laser beam and the broad spectrum fluorescence is blue light, the width of the blue light wavelength band in the laser beam is smaller than that in the broad spectrum fluorescence. If the overlapping wavelength band of the laser beam and the broad spectrum fluorescence is green light, the width of the green wavelength band in the laser beam is smaller than that in the broad spectrum fluorescence. It should be noted that the overlapping wavelength band of the laser beam and the broad spectrum fluorescence can be set based on the requirement, and is not limited to the overlapping of the red, green and blue tricolor lights, and can also be other overlapping wavelength bands, such as yellow light.
The spectrum of the broad spectrum fluorescence is shown in fig. 7, fig. 7 is a spectrogram of the broad spectrum fluorescence provided by the embodiment of the invention, the horizontal axis is the wavelength, the vertical axis is the normalized intensity, and the wavelength of the broad spectrum fluorescence is 470nm to 780nm and includes the whole visible light band.
Fig. 8 is a graph of a spectrum of a laser beam provided by an embodiment of the present invention, in which a horizontal axis is a wavelength, a vertical axis is normalized intensity, a wavelength range of the blue light 11 is 440 to 470nm, a wavelength range of the green light 12 is 520 to 540nm, and a wavelength range of the red light 13 is 630 to 650 nm.
In the manner shown in fig. 6, in the light source device shown in fig. 6, the coupling members 2 to 6 may be structured as shown in fig. 9 to 11.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a coupling assembly according to an embodiment of the present invention, fig. 10 is a sectional view of fig. 9 in a P-P 'direction, and fig. 11 is another sectional view of fig. 9 in the P-P' direction.
The coupling members 2 to 6 may include a transparent substrate 01 as shown in fig. 9 and 10, and a reflective film 04 is provided on a surface of the transparent substrate 01. The reflective film 04 exposes the transparent substrate 01 in the area of the light-transmitting window 02, and the transparent substrate 01 has a non-porous structure.
In another embodiment, as shown in fig. 9 and 11, the transparent substrate 01 has a through hole 05 in a region corresponding to the light-transmitting window 02. The transparent substrate 01 may be a glass plate, a transparent plastic plate, or the like.
Optionally, as for the method shown in fig. 10, an antireflection film (not shown) may be further coated on at least one surface of the transparent substrate 01 corresponding to the light-transmitting window 02 region to reduce the interface loss of light.
The light-transmitting window 02 may be any one of a circle, an ellipse, and a polygon. The wide-spectrum fluorescence emitted by the second light source component 2-7 cannot be reflected to the light rod 2-9 corresponding to the position of the light-transmitting window 02, and in order to reduce the waste of the wide-spectrum fluorescence in the maximum range, the laser beam output by the first light source component 2-1 is converged to the light-transmitting window 02 through the focusing position arranged by the second converging component 2-5, so that a small light-transmitting window 02 can be used, and the waste of light energy is reduced. The first convergence assemblies 2 to 8 can condense the broad spectrum fluorescence output by the second light source assemblies 2 to 7, so that the size difference of light spots of the two light sources is reduced, and the shimming effect is improved.
In the mode of fig. 6-11, the laser beam output by the first light source assembly 2-1 is parallel light, and after being converged by the second converging assembly 2-5, the parallel light passes through the light-transmitting window 02 of the coupling assembly 2-6; on the other path, the broad spectrum fluorescence output by the second light source component 2-7 is parallel light and is reflected by the coupling component 2-6; the coupling components 2-6 couple the two paths of light into a first light beam, and then the first light beam is incident to the first convergence components 2-8, and the first convergence components 2-8 converge the first light beam into a second light beam and then the second light beam is incident to the light bar 2-9. The laser beam and the wide spectrum fluorescence are continuously internally reflected in the light bar 2-9, are shaped by shimming and finally are emitted out through the emitting end of the light bar 2-9.
In the embodiment of the invention, when the laser beam is converged by the second converging component 2-5 and passes through the light-transmitting window 02 area of the coupling component 2-6, the energy loss is very small, when the broad-spectrum fluorescence passes through the coupling component 2-6, only the light loss corresponding to the area of the light-transmitting window 02 area is reduced, compared with the traditional scheme, the light loss is less, a certain light energy utilization rate is improved, and the emergent light of the two light source components is fused and superposed before entering the light bar 2-9, so that the shimming effect can be greatly improved.
In order to avoid the waste of light waves from the light-transmissive window 02 while achieving uniform coupling of the two light sources, the light source device may also be as shown in fig. 12-14.
In one mode, referring to fig. 12, fig. 12 is a light path diagram of another light source device according to an embodiment of the present invention. As shown in fig. 12, the difference from the method shown in fig. 6 to 11 is that in the method shown in fig. 12, the coupling assembly 2-6 includes a first reflective element 261 and a second reflective element 262, and a gap 03 is provided between the first reflective element 261 and the second reflective element 262, which can be used as the light-transmitting window 02; a portion of the broad spectrum fluorescence is reflected by the first reflective element 261 and another portion of the broad spectrum fluorescence is reflected by the second reflective element 262; after passing through the slit 03, the laser beam is coupled with the broad spectrum fluorescence reflected by the first reflecting element 261 and the second reflecting element 262 to be the first beam, and then enters the first converging assembly 2-8.
In this manner, the laser beam output by the first light source module 2-1 is parallel light and passes through the gap 03 between the first reflecting element 261 and the second reflecting element 262; on the other hand, the broad spectrum fluorescence output by the second light source assembly 2-7 is parallel light, a part of the broad spectrum fluorescence is reflected by the first reflecting element 261, and the other part of the broad spectrum fluorescence is reflected by the second reflecting element 262; the coupling component 2-6 couples the laser beam passing through the slit 03 with the broad-spectrum fluorescence reflected by the first reflecting element 261 and the second reflecting element 262 into a first beam, and the first beam is incident on the first converging component 2-8, converged by the first converging component 2-8, and then incident on the optical rod 2-9. The laser beam and the wide spectrum fluorescence are continuously internally reflected in the light bar 2-9, are shaped by shimming and finally are emitted out through the emitting end of the light bar 2-9.
In the embodiment of the invention, the reflecting mirrors which are overlapped in space are adopted to combine the laser beams and the wide-spectrum fluorescence, the light paths are all conventional lenses, the cost is low, no light loss exists, the laser beams and the wide-spectrum fluorescence light are both vertical to the light rods for incidence of 2-9, and the shimming effect is good.
Wherein the first reflective element 261 and the second reflective element 262 are partially overlapped in the light emitting direction of the second light source assembly 2-7 to ensure that all the broad spectrum fluorescence is reflected to the first concentrating assembly 2-8 through the first reflective element 261 and the second reflective element 262, and compared with the manner shown in fig. 6-11, the manner shown in fig. 12 has no waste of light waves.
In the mode shown in fig. 12, the difference between the spot sizes of the laser beam and the broad spectrum fluorescence is large. In order to reduce the difference between the spot sizes of the laser beam and the broad-spectrum fluorescent light, the method shown in fig. 12 is further optimized, as shown in fig. 13, and fig. 13 is a light path diagram of another light source apparatus provided in the embodiment of the present invention.
As shown in fig. 13, a first lens assembly 2-3 is arranged between the first light source assembly 2-1 and the coupling assembly for adjusting the spot size of the laser beam; and/or a second lens component is arranged between the coupling component and the first convergence components 2-8 and is used for adjusting the spot size of the laser beam and the spot size of the broad spectrum fluorescence.
It should be noted that if the first lens components 2-3 are separately arranged and are plano-convex lenses, the adjustment of the laser beam spots is realized by adjusting the focal length, so as to reduce the size difference between the laser beam and the broad spectrum fluorescence spots, reduce the incident angle difference between the laser beam and the broad spectrum fluorescence, and improve the uniformity of the coupled light; if the first lens component 2-3 and the second lens component are arranged at the same time, the two are cylindrical mirrors, the size difference of the laser beam and the wide-spectrum fluorescence light spot can be reduced, the incident angle difference of the laser beam and the wide-spectrum fluorescence light can be reduced, and the uniformity of the coupled light is improved.
In the manner shown in fig. 13, the laser beam output by the first light source module 2-1 is parallel light, and after being converged by the first lens assembly 2-3, the parallel light passes through the gap between the first reflecting element 261 and the second reflecting element 262; on the other hand, the broad spectrum fluorescence output by the second light source assembly 2-7 is parallel light, a part of the broad spectrum fluorescence is reflected by the first reflecting element 261, and the other part of the broad spectrum fluorescence is reflected by the second reflecting element 262; the coupling component couples the laser beam passing through the slit with the broad spectrum fluorescence reflected by the first reflecting element 261 and the second reflecting element 262 into a first beam, and the first beam is incident on the first converging component 2-8, converged by the first converging component 2-8, and then incident on the optical rod 2-9. The laser beam and the wide spectrum fluorescence are continuously internally reflected in the light bar 2-9, are shaped by shimming and finally are emitted out through the emitting end of the light bar 2-9.
Based on the manner shown in fig. 12, the light source apparatus may be further shown in fig. 14, fig. 14 is a light path diagram of another light source apparatus provided in the embodiment of the present invention, in the manner shown in fig. 14, a first lens assembly 2-3 is provided between the first light source assembly 2-1 and the coupling assembly for adjusting the spot size of the laser beam, and a second lens assembly 2-4 is provided between the coupling assembly and the first focusing assembly 2-8 for adjusting the spot size of the laser beam and the spot size of the broad-spectrum fluorescence.
In this way, the laser beam output by the first light source assembly 2-1 is parallel light, and after being converged by the first lens assembly 2-3, passes through the gap between the first reflecting element 261 and the second reflecting element 262; on the other hand, the broad spectrum fluorescence output by the second light source assembly 2-7 is parallel light, a part of the broad spectrum fluorescence is reflected by the first reflecting element 261, and the other part of the broad spectrum fluorescence is reflected by the second reflecting element 262; the coupling component couples the laser beam passing through the slit with the broad spectrum fluorescence reflected by the first reflecting element 261 and the second reflecting element 262 into a first beam, and the first beam is incident to the second lens component 2-4 and the first converging component 2-8, and then is incident to the light rod 2-9 after being converged. The laser beam and the wide spectrum fluorescence are continuously internally reflected in the light bar 2-9, are shaped by shimming and finally are emitted out through the emitting end of the light bar 2-9.
In the embodiment of the invention, in order to reduce the difference value between the sizes of the laser beam and the wide-spectrum fluorescence light spot and the difference value between the incident angles of the laser beam and the wide-spectrum fluorescence light, a group of cylindrical mirrors are added, and the sizes and the angles of the laser beam are adjusted by adjusting the focal length of the cylindrical mirrors, so that the laser beam and the wide-spectrum light spot can be completely coupled into the light bar under the condition that the incident area of the light bar is small, and the optimal shimming effect is achieved.
The light bar is a cylinder, the cylinder can be a cubic light bar or a cylindrical light bar, and the front end face and the rear end face are perpendicular to the side faces. The technical scheme of the invention does not need to use a special-shaped light bar, and the device has a simple structure.
As can be seen from the above description, in the light source device provided in the technical scheme of the present invention, the coupling component is located between the first light source component and the first convergence component, wherein the coupling component has the light-transmitting window, the laser beam emitted from the first light source component is coupled with the broad-spectrum fluorescence reflected by the coupling component through the light-transmitting window to form the first beam, and then the first beam is incident to the first convergence component, and the first convergence component converges the first beam to form the second beam, and the second beam is incident to the light rod to perform the shimming shaping process, so that the light energy utilization rate is improved.
Based on the above embodiment, another embodiment of the present invention further provides a display device, which includes the light source apparatus described in the above embodiment. It should be noted that the display device of the above embodiments of the present application may be an LCD display device.
The display equipment provided by the embodiment of the invention can be an electronic device with a display function, such as a mobile phone, a computer, a television and the like. The display equipment adopts the light source device, and has the advantages of good shimming effect, high light energy utilization rate and the like.
Based on the foregoing embodiments, another embodiment of the present invention further provides an illumination device, where the illumination device includes the light source device in the foregoing embodiments, and it should be noted that the illumination device in the foregoing embodiments of the present application may be a backlight module.
The lighting device provided by the embodiment of the invention can be lighting equipment such as a lamp. The lighting device adopts the light source device, and has the advantages of good shimming effect, high light energy utilization rate and the like.
The embodiments in the present description are described in a progressive manner, or in a parallel manner, or in a combination of a progressive manner and a parallel manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments can be referred to each other. For the display device and the illumination device disclosed by the embodiment, since the display device and the illumination device correspond to the light source device disclosed by the embodiment, the description is relatively simple, and relevant points can be referred to the light source device for partial description.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in an article or device that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A light source device, characterized in that the light source device comprises:
a first light source assembly for emitting a laser beam;
a second light source assembly for emitting broad spectrum fluorescence;
a coupling assembly for coupling the laser beam and the broad spectrum fluorescence into a first beam;
the first converging component is used for converging the first light beam into a second light beam;
a light bar for shimming and shaping the second light beam;
wherein the coupling assembly is located between the first light source assembly and the first converging assembly; the coupling assembly is provided with a light-transmitting window, and the laser beam is incident to the first convergence assembly after passing through the light-transmitting window and being coupled with the broad-spectrum fluorescence reflected by the coupling assembly into the first beam.
2. The light source device of claim 1, wherein the coupling assembly comprises a transparent substrate having a surface with a reflective film;
the reflecting film exposes the transparent substrate of the light-transmitting window area, or the transparent substrate is provided with a through hole corresponding to the area of the light-transmitting window.
3. The light source device of claim 1, wherein the coupling assembly comprises a first reflective element and a second reflective element with a gap therebetween; a portion of the broad spectrum fluorescent light is reflected by the first reflective element and another portion of the broad spectrum fluorescent light is reflected by the second reflective element;
after the laser beam passes through the gap, the laser beam is coupled with the broad spectrum fluorescence reflected by the first reflecting element and the second reflecting element to be the first beam and then enters the first convergence assembly.
4. The light source device according to claim 3, wherein a first lens assembly is provided between the first light source assembly and the coupling assembly for adjusting the spot size of the laser beam;
and/or a second lens component is arranged between the coupling component and the first convergence component and is used for adjusting the spot size of the laser beam and the spot size of the broad spectrum fluorescence.
5. The light source device of claim 1, wherein the first converging component is coaxial with the light bar;
the emitting direction of the laser beam is parallel to the optical axis, the emitting direction of the broad spectrum fluorescence is perpendicular to the optical axis, or the emitting direction of the laser beam is perpendicular to the optical axis, and the emitting direction of the broad spectrum fluorescence is parallel to the optical axis.
6. The light source device according to claim 1, wherein the second light source assembly comprises: a set laser light source for emitting laser light of a preset color; and a fluorescent element for emitting fluorescent light based on the preset color laser light.
7. The light source device according to claim 6, wherein the fluorescent element is a phosphor of a ceramic fluorescent material, a crystal fluorescent material, or an inorganic paste mixed phosphor.
8. The light source device according to claim 1, wherein the laser beam includes one or more of a red laser, a green laser, and a blue laser;
the broad spectrum fluorescence comprises at least a portion of visible light;
the laser beam and the broad spectrum fluorescence have overlapped wave bands, and the spectral width of the continuous spectrum including the overlapped wave bands in the laser beam is smaller than the spectral width of the continuous spectrum including the overlapped wave bands in the broad spectrum fluorescence.
9. A display device characterized in that the display device comprises a light source arrangement according to any one of claims 1-8.
10. A lighting device, characterized in that it comprises a light source device according to any one of claims 1-8.
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| CN202010273959.8A CN111796432A (en) | 2020-04-09 | 2020-04-09 | Light source device, display apparatus, and illumination device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010273959.8A CN111796432A (en) | 2020-04-09 | 2020-04-09 | Light source device, display apparatus, and illumination device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102929086A (en) * | 2012-08-22 | 2013-02-13 | 深圳市绎立锐光科技开发有限公司 | Light emitting device and related projection system |
| CN106526874A (en) * | 2016-12-09 | 2017-03-22 | 深圳开立生物医疗科技股份有限公司 | Optical coupling device, light source system and endoscope system |
| CN211577575U (en) * | 2020-04-09 | 2020-09-25 | 北京镭创高科光电科技有限公司 | Light source device, display apparatus, and illumination device |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102929086A (en) * | 2012-08-22 | 2013-02-13 | 深圳市绎立锐光科技开发有限公司 | Light emitting device and related projection system |
| CN106526874A (en) * | 2016-12-09 | 2017-03-22 | 深圳开立生物医疗科技股份有限公司 | Optical coupling device, light source system and endoscope system |
| CN211577575U (en) * | 2020-04-09 | 2020-09-25 | 北京镭创高科光电科技有限公司 | Light source device, display apparatus, and illumination device |
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