CN111796433A - Light source device, display apparatus, and illumination device - Google Patents
Light source device, display apparatus, and illumination device Download PDFInfo
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- CN111796433A CN111796433A CN202010274495.2A CN202010274495A CN111796433A CN 111796433 A CN111796433 A CN 111796433A CN 202010274495 A CN202010274495 A CN 202010274495A CN 111796433 A CN111796433 A CN 111796433A
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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
- G02B27/48—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 first light source beam; a second light source assembly for emitting a second light source beam; a coupling assembly to couple the first source light beam and the second source light beam into a first light beam; the 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 component comprises a wavelength beam combiner and a reflector; the wavelength beam combining mirror can enable light in a set waveband to be transmitted and light in other wavebands to be reflected. By applying the technical scheme provided by the invention, the light energy utilization rate is improved, and the shimming effect can be improved without adopting a special-shaped light bar.
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 first light source beam;
a second light source assembly for emitting a second light source beam;
a coupling assembly to couple the first source light beam and the second source light beam into a first light beam;
the 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 one of the first light source beam and the second light source beam is a laser beam and the other is a broad spectrum fluorescence; the coupling component comprises a wavelength beam combiner and a reflector; the wavelength beam combining mirror is provided with a first surface and a second surface which are opposite; the wavelength beam combiner can enable light in a set waveband to be transmitted and reflect light in other wavebands; the first surface is arranged on the first light source light beam irradiation path, so that one part of the first light source light beam penetrates through the wavelength beam combiner and is incident to the convergence component, and the other part of the first light source light beam sequentially passes through the wavelength beam combiner and the reflector and is reflected to the convergence component; the second surface is on an irradiation path of the second light source light beam, so that a part of the second light source light beam penetrates through the wavelength beam combiner and is reflected to the convergence assembly through the reflector, and the other part of the second light source light beam is reflected to the convergence assembly through the wavelength beam combiner.
Preferably, in the above light source device, the converging component is located between the coupling component and the light rod, and the converging component and the light rod are coaxial;
the reflector and the wavelength beam combiner form an included angle of 45 degrees with the optical axis, the reflector and the wavelength beam combiner are arranged oppositely in a direction perpendicular to the optical axis, and the reflecting surface of the reflector and the second surface face the convergence assembly;
the light-emitting direction of the first light source assembly faces towards the first surface and is parallel to the optical axis, and the light-emitting direction of the second light source assembly faces towards the second surface and is perpendicular to the optical axis.
Preferably, in the light source device, the first light source unit emits the first light source beam to the first surface, and the second light source unit emits the second light source beam to the second surface.
Preferably, in the above light source device, the first light source beam emitted from the first light source module is completely irradiated to the first surface;
a part of second light source beams emitted by the second light source assembly irradiate the second surface, and the other part of the second light source beams directly irradiate the reflector;
wherein the first light source beam is a laser beam.
Preferably, in the above light source device, the wavelength combining mirror includes: the light filter film is used for enabling light smaller than a set wavelength to penetrate through and reflecting light not smaller than the set wavelength.
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 first light source beam is a laser beam including one or more of a red laser beam, a green laser beam, and a blue laser beam;
the second source beam is broad spectrum fluorescent light comprising at least part of visible light;
the first source beam and the second source beam have overlapping bands, and a spectral width of a continuum including the overlapping band in the first source beam is smaller than a spectral width of a continuum including the overlapping band in the second source beam.
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 converging component, where the coupling component includes the wavelength beam combiner and the reflector, and the wavelength beam combiner can transmit light in a set wavelength band and reflect light in other wavelength bands. In the scheme, the first light source light beam and the second light source light beam are coupled into the first light beam through the wavelength beam combining mirror and the reflecting mirror and are incident to the convergence assembly, the convergence assembly converges the first light beam into the second light beam and is incident to the optical rod for shimming and shaping treatment, and therefore 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 light path diagram of another light source device provided in the embodiment of the present invention;
FIG. 8 is a spectrum of a second source beam provided in accordance with an embodiment of the present invention;
FIG. 9 is a spectral diagram of a first source beam provided in accordance with an embodiment of the present invention;
fig. 10 is a coating film curve diagram of a wavelength beam combiner 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 waveband included in the light sources 1-1 to 1-4, the S3 surface is plated with an antireflection film in a designated area (such as a dotted oval area in fig. 2), the antireflection wavelength corresponds to a waveband included in the light source 5, the S4 surface is plated with an antireflection film, the wavelength corresponds to a waveband 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, the light beams emitted from the two light sources are different regions of the incident end face of the incident light rod 8, which results in poor fusion and poor shimming of the two light sources, and a special-shaped solid light rod needs to be arranged as the element 3, thereby increasing the difficulty in alignment and installation of the system and the complexity of the device structure, and causing problems of complex structure and high cost.
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 first light source beam;
a second light source assembly for emitting a second light source beam;
a coupling assembly to couple the first source light beam and the second source light beam into a first light beam;
the 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 one of the first light source beam and the second light source beam is a laser beam and the other is a broad spectrum fluorescence; the coupling component comprises a wavelength beam combiner and a reflector; the wavelength beam combining mirror is provided with a first surface and a second surface which are opposite; the wavelength beam combiner can enable light in a set waveband to be transmitted and reflect light in other wavebands; the first surface is arranged on the first light source light beam irradiation path, so that one part of the first light source light beam penetrates through the wavelength beam combiner and is incident to the convergence component, and the other part of the first light source light beam sequentially passes through the wavelength beam combiner and the reflector and is reflected to the convergence component; the second surface is on an irradiation path of the second light source light beam, so that a part of the second light source light beam penetrates through the wavelength beam combiner and is reflected to the convergence assembly through the reflector, and the other part of the second light source light beam is reflected to the convergence assembly through the wavelength beam combiner.
Therefore, in the light source device, the display device and the illumination device provided by the technical scheme of the invention, the coupling component is positioned between the first light source component and the convergence component, wherein the coupling component comprises the wavelength beam combining mirror and the reflecting mirror, and the wavelength beam combining mirror can enable light in a set waveband to be transmitted and reflect light in other wavebands. In the scheme, the first light source light beam and the second light source light beam are coupled into the first light beam through the wavelength beam combining mirror and the reflecting mirror and are incident to the convergence assembly, the convergence assembly converges the first light beam into the second light beam and is incident to the optical rod for shimming and shaping treatment, and therefore 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 apparatus according to an embodiment of the present invention, and as shown in fig. 6, the light source apparatus includes:
a first light source assembly 3-1, the first light source assembly 3-1 for emitting a first light source beam; a second light source assembly 3-4, the second light source assembly 3-4 for emitting a second light source beam; a coupling component 3-7, the coupling component 3-7 to couple the first source light beam and the second source light beam into a first light beam; the converging component 3-5 is used for converging the first light beam into a second light beam by the converging component 3-5; a light bar 3-6, the light bar 3-6 is used for carrying out shimming shaping treatment on the second light beam.
Wherein one of the first light source beam and the second light source beam is a laser beam and the other is a broad spectrum fluorescence; the coupling component 3-7 comprises a wavelength beam combining mirror 3-3 and a reflecting mirror 3-2; the wavelength beam combiner 3-3 has opposite first and second surfaces; the wavelength beam combiner 3-3 can enable light in a set waveband to be transmitted and reflect light in other wavebands; the first surface is on the first light source light beam irradiation path, so that a part of the first light source light beam penetrates through the wavelength beam combiner 3-3 and is incident to the convergence component 3-5, and the other part of the first light source light beam sequentially passes through the wavelength beam combiner 3-3 and the reflector 3-2 and is reflected to the convergence component 3-5; the second surface is on an irradiation path of the second light source light beam, so that a part of the second light source light beam is reflected to the convergence component 3-5 through the reflector 3-2 after passing through the wavelength beam combiner 3-3, and another part of the second light source light beam is reflected to the convergence component 3-5 through the wavelength beam combiner 3-3.
In the embodiment of the present invention, the first light source component emits laser beams, and the second light source component emits broad-spectrum fluorescence is taken as an example for description, in other manners, the first light source component may also emit broad-spectrum fluorescence, and the second light source component emits laser beams.
Wherein the converging component 3-5 is located between the coupling component 3-7 and the optical rod 3-6, and the converging component 3-5 and the optical rod 3-6 are coaxial; the reflector 3-2 and the wavelength beam combiner 3-3 both have an included angle of 45 degrees with the optical axis, and are arranged oppositely in a direction perpendicular to the optical axis, and the reflecting surface of the reflector 3-2 and the second surface both face the convergence component 3-5; the light emitting direction of the first light source assembly 3-1 faces the first surface and is parallel to the optical axis, and the light emitting direction of the second light source assembly 3-4 faces the second surface and is perpendicular to the optical axis.
As shown in fig. 6, the first light source beam emitted from the first light source assembly 3-1 completely irradiates the first surface, and the second light source beam emitted from the second light source assembly 3-4 completely irradiates the second surface.
In the manner shown in fig. 6, the first light source beam output by the first light source assembly 3-1 is parallel light, and passes through the first surface of the wavelength beam combiner 3-3, a part of the first light source beam penetrates through the wavelength beam combiner 3-3 and is incident to the convergence assembly 3-5, and another part of the first light source beam passes through the wavelength beam combiner 3-3 and the reflector 3-2 in sequence and is reflected to the convergence assembly 3-5. In the other path, the second light source beams output by the second light source assembly 3-4 are parallel light and pass through the second surface of the wavelength beam combining mirror 3-3, a part of the second light source beams penetrate through the wavelength beam combining mirror 3-3 and then are reflected to the convergence assembly 3-5 through the reflector 3-2, and the other part of the second light source beams are reflected to the convergence assembly 3-5 through the wavelength beam combining mirror 3-3. The coupling component 3-7 couples the first light source light beam and the second light source light beam into a first light beam, and the first light beam and the second light beam are incident to the convergence component 3-5, and then are incident to the light bar 3-6 after being converged into a second light beam by the convergence component 3-5. The first light source light beam and the second light source light beam are continuously subjected to internal reflection and shimming shaping in the light bar 3-6 and finally emitted out through the emitting end of the light bar 3-6.
In the mode shown in fig. 6, the first light source beam fully irradiates the first surface, the second light source beam fully irradiates the second surface, and the wavelength combining mirror 3-3 and the reflecting mirror 3-2 are disposed to be completely opposite to each other, so that the volume of the coupling component 3-7 can be reduced.
As shown in fig. 7, fig. 7 is a light path diagram of another light source device according to the embodiment of the present invention, in which a first light source beam emitted from the first light source module 3-1 completely irradiates the first surface; the second light source beam emitted by the second light source assembly 3-4 is divided into two parts, one part is irradiated to the second surface, and the other part is directly irradiated to the reflector 3-2. Wherein the first light source beam is a laser beam.
In the manner shown in fig. 7, the first light source beam output by the first light source assembly 3-1 is parallel light, after the first light source beam completely irradiates the first surface of the wavelength beam combiner 3-3, a part of the first light source beam penetrates the first surface of the wavelength beam combiner 3-3 and is incident to the convergence assembly 3-5, and another part of the first light source beam sequentially passes through the wavelength beam combiner 3-3 and the reflector 3-2 and is reflected to the convergence assembly 3-5. The second light source beams output by the second light source assemblies 3-4 are parallel light and are divided into two parts: a part of light beams of the second light source are incident and transmitted through the second surface of the wavelength beam combiner 3-3, and are divided into two paths through the long beam combiner 3-3, one path is incident to the reflector 3-2 through the wavelength beam combiner 3-3 and then reflected to the convergence component 3-5, and the other path is reflected to the convergence component 3-5 through the wavelength beam combiner 3-3; the other part of the second light source light beams directly enter the reflector 3-2 and are reflected to the converging component 3-5 through the reflector 3-2. The coupling component 3-7 couples the first light source light beam and the second light source light beam into a first light beam, and the first light beam and the second light beam are incident to the convergence component 3-5, and then are incident to the light bar 3-6 after being converged into a second light beam by the convergence component 3-5. The first light source light beam and the second light source light beam are continuously subjected to internal reflection and shimming shaping in the light bar 3-6 and finally emitted out through the emitting end of the light bar 3-6.
In the mode shown in fig. 7, the wavelength beam combiner 3-3 is disposed in parallel with the reflector 3-2, and the lower end of the wavelength beam combiner 3-3 is close to the converging component 3-5 relative to the lower end of the reflector 3-2, so as to expose a lower end portion of the reflector 3-2. The whole first surface or the second surface of the wavelength beam combiner 3-3 is coated with a filter film, the light beam of the second light source is divided into two parts, one part is directly incident to the reflector 3-2, and the other part is incident to the wavelength beam combiner 3-3.
The first light source beam is a laser beam, the second light source beam is broad spectrum fluorescence, and due to the fact that the spot size of the broad spectrum fluorescence is large and the divergence angle is large, through the mode shown in fig. 7, one part of the broad spectrum fluorescence can directly irradiate the reflecting mirror 3-2, the other part of the broad spectrum fluorescence irradiates the wavelength beam combining mirror 3-3, and the wavelength is selected to reflect and transmit through the wavelength beam combining mirror 3-3, so that the problem that the difference value of incidence angles of the laser beam and the broad spectrum fluorescence beam is large due to the converged spots is solved, and the shimming effect is further improved.
The proportion of the beams of the second light source beam directly incident to the reflector 3-2 and the direct incident wavelength beam combining mirror 3-3 can be adjusted by setting the overlapping area of the reflector 3-2 and the wavelength beam combining mirror 3-3, so as to select the optimal light splitting proportion of the shimming effect.
It should be noted that the light bar 3-6 in this case is a cylinder, such as a cube light bar or a cylindrical light bar, and the front and rear end faces and the side faces of the light bar 3-6 are perpendicular. The technical scheme of the invention does not need to use a special-shaped light bar, and the device has a simple structure.
In the embodiment of the present invention, the second light source assembly 3-4 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.
The fluorescent element is a phosphor made of a ceramic fluorescent material, a crystal fluorescent material or 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 first light source beam is a laser beam, and comprises one or more of red laser, green laser and blue laser; the second source light beam is broad spectrum fluorescent light comprising at least part of the visible light, e.g. may comprise the entire visible light spectrum; the first source beam and the second source beam have overlapping bands, and a spectral width of a continuum including the overlapping band in the first source beam is smaller than a spectral width of a continuum including the overlapping band in the second source beam.
If the overlapping wavelength band of the first light source beam and the second light source beam is red light, the red wavelength band width in the first light source beam is smaller than the red wavelength band width in the second light source beam. If the overlapping wavelength band of the first light source beam and the second light source beam is blue light, the width of the blue wavelength band in the first light source beam is smaller than that in the second light source beam. If the overlapping wavelength band of the first light source beam and the second light source beam is green light, the width of the green wavelength band in the first light source beam is smaller than that in the second light source beam. It should be noted that the overlapping wavelength band of the first light source light beam and the second light source light beam may be set based on the requirement, and is not limited to the overlapping of the red, green and blue primary lights, and may also be other overlapping wavelength bands, such as yellow light.
The spectrum of the second light source beam is shown in fig. 8, fig. 8 is a spectrum diagram of the second light source beam provided by the embodiment of the present invention, the horizontal axis is the wavelength, the vertical axis is the normalized intensity, and the wavelength of the second light source beam is 470nm to 780 nm.
Fig. 9 is a spectrum diagram of the first light source beam, where the horizontal axis is wavelength and the vertical axis is normalized intensity, the wavelength range of the blue light 11 is 440-470 nm, the wavelength range of the green light 12 is 520-540 nm, and the wavelength range of the red light 13 is 630-650 nm.
In the embodiment of the present invention, the wavelength beam combiner 3-3 includes: the light filter film is used for enabling light smaller than a set wavelength to penetrate through and reflecting light not smaller than the set wavelength. The transparent substrate may be a glass plate or a transparent plastic plate. Fig. 10 shows the wavelength combining mirror 3-3, where fig. 10 is a coating curve diagram of the wavelength combining mirror provided in the embodiment of the present invention, and 03 is a reflection curve and 04 is a transmission curve.
Assuming that the wavelength λ x is set, the light beam incident on the wavelength combining mirror 3-3 with a wavelength greater than λ x will be reflected by the wavelength combining mirror 3-3, and the light beam with a wavelength less than λ x can pass through the wavelength combining mirror 3-3. The surface of the wavelength beam combining mirror 3-3 is provided with a wavelength splitting film which reflects or transmits based on the wavelength of incident light. λ x is related to the spectroscopic film employed.
If the wavelength λ x is set to 540nm, for the light beam incident on the wavelength combining mirror 3-3, the light with the wavelength greater than 540nm will be reflected by the wavelength combining mirror 3-3, and the light with the wavelength less than 540nm can be transmitted through the wavelength combining mirror 3-3, i.e. green light and blue light are transmitted, and red light is reflected. The set wavelength lambda x is a boundary between a reflection wavelength and a transmission wavelength of the wavelength beam combining mirror 3-3, theoretically, the set wavelength lambda x can be any point in a wide band range, and in order to control the size of a light spot and an incident angle of a laser beam and a broad spectrum fluorescence incident-coupling light rod 3-6, so that the reflecting mirror 3-2 can form one mixed beam of laser and fluorescence, and the laser transmitted by the wavelength beam combining mirror 3-3 and the reflected fluorescence form another mixed beam of laser and fluorescence, and thus a good shimming effect is achieved, the set wavelength lambda x is set to be a point value in a range from 470nm to 520nm, or a point value in a range from 540nm to 630 nm.
It should be noted that the set wavelength adapted by the wavelength combining mirror 3-3 may be set based on requirements, and is not limited to the manner described in the embodiment of the present invention.
For example, in the manner shown in fig. 6, when the first light source beam output by the first light source assembly 3-1 passes through the first surface of the wavelength beam combiner 3-3, the blue first light source beam passes through the wavelength beam combiner 3-3 and is incident to the converging assembly 3-5, and the red first light source beam and the green first light source beam sequentially pass through the wavelength beam combiner 3-3 and the reflector 3-2 and are reflected to the converging assembly 3-5. In the other path, the second light source beams output by the second light source assembly 3-4 pass through the second surface of the wavelength beam combining mirror 3-3, the blue second light source beams are reflected to the convergence assembly 3-5 through the reflector 3-2 after passing through the wavelength beam combining mirror 3-3, and the red and green second light source beams are reflected to the convergence assembly 3-5 through the wavelength beam combining mirror 3-3.
In another mode, if the wavelength is set to 560nm, light having a wavelength greater than 560nm is reflected, light having a wavelength less than 560nm is transmitted, i.e., blue and green light is transmitted, and red light is reflected.
For example, in the manner shown in fig. 7, a portion of the blue first light source beam and a portion of the green first light source beam output by the first light source module 3-1 are transmitted through the first surface of the wavelength beam combiner 3-3 and incident on the converging module 3-5; a part of red first light source light beams sequentially pass through the wavelength beam combining mirror 3-3 and the reflecting mirror 3-2 and are reflected to the converging component 3-5; a part of the blue first light source light beam, the green first light source light beam and the red first light source light beam directly pass through the gap between the wavelength beam combining mirror 3-3 and the reflecting mirror 3-2 to irradiate the converging component 3-5. In the other path, a part of the blue and green second light source beams in the second light source beams output by the second light source assembly 3-4 penetrate through the second surface of the wavelength beam combiner 3-3 and are reflected to the convergence assembly 3-5 through the reflector 3-2; a part of the red second light source light beams are reflected to the convergence component 3-5 through the wavelength beam combining mirror 3-3; a portion of the blue, green and red second light source beams is reflected directly by the mirror 3-2 to the converging component 3-5.
In the embodiment of the invention, the first light source light beam and the second light source light beam are combined by adopting a mode of overlapping the wavelength beam combining mirror and the reflecting mirror, the light paths are all conventional lenses, the cost is low, no light loss exists, and the light rays of the first light source light beam and the second light source light beam are incident in a direction vertical to the light bar, so that the light spots are small when entering the light bar, the angle is controllable, the shimming effect is improved, and the light energy utilization rate is improved.
As can be seen from the above description, in the light source device provided in the technical solution of the present invention, the coupling component is located between the first light source component and the converging component, where the coupling component includes a wavelength beam combiner and a reflector, and the wavelength beam combiner can transmit light in a set wavelength band and reflect light in other wavelength bands. In the scheme, the first light source light beam and the second light source light beam are coupled into the first light beam through the wavelength beam combiner and the reflector and are incident to the convergence assembly, the first light beam is converged into the second light beam by the convergence assembly, and the second light beam is incident to the optical rod to be subjected to shimming shaping treatment, 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 first light source beam;
a second light source assembly for emitting a second light source beam;
a coupling assembly to couple the first source light beam and the second source light beam into a first light beam;
the 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 one of the first light source beam and the second light source beam is a laser beam and the other is a broad spectrum fluorescence; the coupling component comprises a wavelength beam combiner and a reflector; the wavelength beam combining mirror is provided with a first surface and a second surface which are opposite; the wavelength beam combiner can enable light in a set waveband to be transmitted and reflect light in other wavebands; the first surface is arranged on the first light source light beam irradiation path, so that one part of the first light source light beam penetrates through the wavelength beam combiner and is incident to the convergence component, and the other part of the first light source light beam sequentially passes through the wavelength beam combiner and the reflector and is reflected to the convergence component; the second surface is on an irradiation path of the second light source light beam, so that a part of the second light source light beam penetrates through the wavelength beam combiner and is reflected to the convergence assembly through the reflector, and the other part of the second light source light beam is reflected to the convergence assembly through the wavelength beam combiner.
2. The light source device according to claim 1, wherein the converging component is located between the coupling component and the light rod, and the converging component and the light rod are coaxial;
the reflector and the wavelength beam combiner form an included angle of 45 degrees with the optical axis, the reflector and the wavelength beam combiner are arranged oppositely in a direction perpendicular to the optical axis, and the reflecting surface of the reflector and the second surface face the convergence assembly;
the light-emitting direction of the first light source assembly faces towards the first surface and is parallel to the optical axis, and the light-emitting direction of the second light source assembly faces towards the second surface and is perpendicular to the optical axis.
3. The light source device as claimed in claim 2, wherein the first light source assembly emits a first light source beam that completely irradiates the first surface, and the second light source assembly emits a second light source beam that completely irradiates the second surface.
4. The light source device of claim 2, wherein the first light source assembly emits a first light source beam that completely illuminates the first surface;
a part of second light source beams emitted by the second light source assembly irradiate the second surface, and the other part of the second light source beams directly irradiate the reflector;
wherein the first light source beam is a laser beam.
5. The light source device according to claim 1, wherein the wavelength combining mirror includes: the light filter film is used for enabling light smaller than a set wavelength to penetrate through and reflecting light not smaller than the set wavelength.
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 first light source beam is a laser beam comprising one or more of a red laser, a green laser and a blue laser;
the second source beam is broad spectrum fluorescent light comprising at least part of visible light;
the first source beam and the second source beam have overlapping bands, and a spectral width of a continuum including the overlapping band in the first source beam is smaller than a spectral width of a continuum including the overlapping band in the second source beam.
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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| CN202010274495.2A CN111796433A (en) | 2020-04-09 | 2020-04-09 | Light source device, display apparatus, and illumination device |
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| CN202010274495.2A CN111796433A (en) | 2020-04-09 | 2020-04-09 | Light source device, display apparatus, and illumination device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114040133A (en) * | 2021-11-08 | 2022-02-11 | 四川长虹电器股份有限公司 | Optical engine and laser television |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114040133A (en) * | 2021-11-08 | 2022-02-11 | 四川长虹电器股份有限公司 | Optical engine and laser television |
| CN114040133B (en) * | 2021-11-08 | 2023-02-24 | 四川长虹电器股份有限公司 | Optical engine and laser television |
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Address after: Room 401, room 402, building 1, Zone C, industrial square, science and Technology City, 588 Wutaishan Road, high tech Zone, Suzhou City, Jiangsu Province, 215000 Applicant after: Jiangsu radium Technology Co.,Ltd. Address before: 100176 5th floor, block B, block 19, Han's enterprise Bay, yard 8, Liangshuihe 2nd Street, Beijing Economic and Technological Development Zone, Beijing Applicant before: BEIJING LITRONICS OPTOELECTRONICS TECHNOLOGY Co.,Ltd. |