CN213182297U - Laser light source device and projection display system - Google Patents
Laser light source device and projection display system Download PDFInfo
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- CN213182297U CN213182297U CN202022233315.4U CN202022233315U CN213182297U CN 213182297 U CN213182297 U CN 213182297U CN 202022233315 U CN202022233315 U CN 202022233315U CN 213182297 U CN213182297 U CN 213182297U
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Abstract
The utility model belongs to the field of optics and discloses a laser light source device and a projection display system, wherein the laser light source device comprises a first light source, a second light source, a transmission fluorescent wheel, a dichroic sheet and a light homogenizing component, and the first light source is used for emitting a first laser and a second laser with different colors; the second light source is used for emitting third laser, and a laser emergent light path of the second light source is vertical to a laser emergent light path of the first light source; the transmission fluorescence wheel comprises a fluorescence area and a transmission area, the fluorescence area is excited by the first laser to emit fluorescence, and the transmission area transmits the first laser and the second laser; the dichroic sheet is arranged in the light emitting direction of the transmission fluorescent wheel and the second light source, and is used for transmitting the third laser and reflecting the fluorescent light emitted from the transmission fluorescent wheel, the first laser and the second laser; the dodging member receives the third laser light transmitted by the dichroic sheet and the fluorescence, the first laser light and the second laser light reflected by the dichroic sheet. The utility model discloses not only can reduce the optical efficiency loss, simple structure moreover, the volume is less.
Description
Technical Field
The utility model relates to an optics field indicates a laser light source device and projection display system especially.
Background
With the development of laser technology, the application of laser light sources is becoming more and more extensive, for example, laser display devices, laser projection devices, etc., in which a light source combining lasers of different colors is required. At present, in order to improve the illumination intensity of the illumination light beam, blue laser is generally irradiated on a fluorescent wheel coated with yellow fluorescent powder, and the light is excited to excite the yellow fluorescent powder on the fluorescent wheel to form a yellow fluorescent light beam.
Chinese patent application No. CN201810008071.4 discloses a light source system and a projection apparatus, including a first light source and a second light source, where the first light source includes a first blue laser light source, a red laser light source and a green laser light source, the second light source includes a second blue laser light source, and the red, green and blue lasers in the first light source enter the light uniformizing device 190 after being reflected by the film coating area 141 of the first light splitting and combining element 140; the second blue laser light source is changed into the received laser light after passing through the wavelength conversion element 180, the received laser light is incident to the edge region 142 of the first light splitting and combining element 140, and the edge region 142 transmits the received laser light and then enters the light uniformizing device. The laser beam generated by the second blue laser yellow phosphor is generally yellow, the yellow spectrum is a wide spectrum, and the green spectrum is covered in the yellow spectrum, i.e. the yellow laser beam overlaps with the green laser beam, while the first light splitting and combining element can only reflect and cannot transmit the red laser beam, the green laser beam and the blue laser beam, and the yellow laser beam can also be reflected and cannot be transmitted by the first light splitting and combining element, therefore, in the scheme, an adjusting device 130 and the like must be arranged to prevent the laser beam of the first light source from being incident to the edge region 142 and being transmitted and not entering the light homogenizing device, and prevent the laser beam from being incident to the film coating region and being not transmitted, the optical structure is complex, and if the adjusting device 130 and the like are not arranged, the optical efficiency loss can be caused.
Disclosure of Invention
The utility model aims at providing a laser source device and projection display system not only can reduce the optical efficiency loss, simple structure moreover, and the volume is less.
The utility model provides a technical scheme as follows:
in one aspect, there is provided a laser light source device, including:
a first light source for emitting first laser light and second laser light of different colors;
the second light source is used for emitting third laser with a preset wavelength, and a laser emergent light path of the second light source is perpendicular to a laser emergent light path of the first light source;
the transmission fluorescent wheel is arranged on a laser emergent light path of the first light source and comprises a fluorescent area and a transmission area, the fluorescent area is excited by the first laser to emit fluorescent light, and the transmission area is used for transmitting the first laser and the second laser;
a dichroic plate disposed in a light emitting direction of the transmission luminescent wheel and the second light source, for transmitting the third laser light and reflecting the luminescent light emitted from the transmission luminescent wheel, the first laser light, and the second laser light;
a light uniformizing unit for receiving the third laser light transmitted by the dichroic sheet and the fluorescent light, the first laser light and the second laser light reflected by the dichroic sheet.
In this scheme, separately set up first light source and second light source, be about to first laser, second laser and third laser separately set up, the non-overlapping laser of two colour chip optional transmission and fluorescence, first laser and second laser frequency spectrum to the laser of reflection surplus frequency spectrum for the laser source device need not set up unnecessary part, and can compromise system colour gamut and luminance, can not cause the efficiency loss simultaneously.
Further preferably, the first light source includes a blue laser light source and a green laser light source, the blue laser light source emits the first laser light, and the green laser light source emits the second laser light.
Further preferably, the third laser is a red laser; the preset wavelength is a wavelength which is not overlapped with the second laser.
Further preferably, the transmission fluorescent wheel includes a first surface and a second surface that are oppositely disposed, the first surface is a light incident side, and the second surface is a light emergent side;
the first surface of the fluorescence area is provided with a coating layer for transmitting the first laser and reflecting the fluorescence, and the second surface of the fluorescence area is provided with yellow fluorescent powder.
In the scheme, the fluorescent region is provided with a wavelength conversion material, namely yellow fluorescent powder, and the wavelength conversion material is used for converting the wavelength of incident blue laser to obtain yellow fluorescent light; the film coating layer is a dichroic film; the coated layer can reflect the fluorescence emitted to the coated layer, and the optical efficiency loss is reduced.
Further preferably, the first surface of the transmission region is provided with a diffusion layer for scattering laser light; and/or;
and a diffusion layer for scattering laser is arranged on the surface of the coating layer of the fluorescent region.
In the scheme, the diffusion layer is arranged, so that the diffusion homogenization effect on the incident laser can be realized, and the incident laser is changed into a uniform surface light source.
Further preferably, the transmission fluorescent wheel is arranged perpendicular to the light-emitting direction of the first light source;
the included angle between the dichroic sheet and the transmission fluorescent wheel is 35-55 degrees.
Further preferably, the light uniformizing part is a light pillar or a light cone.
In another aspect, a projection display system is also provided, which includes the laser light source device.
The technical effects of the utility model reside in that: set up first light source and second light source separately, the third laser can select and fluorescence, the non-overlapping laser of first laser and second laser frequency spectrum, make the dichroic sheet can transmit the third laser, and reflect fluorescence, first laser and second laser, when compromise colour gamut and luminance, not only can prevent the optical efficiency loss, compare in the design that sets up a plurality of adjustment structures etc. among the prior art moreover, the laser light source structure has been simplified, be favorable to overall size's reduction, the miniaturization of laser light source device has been realized.
Drawings
The invention will be described in further detail with reference to the following drawings and embodiments:
fig. 1 is a schematic structural diagram of a laser light source device according to the present invention;
fig. 2 is a schematic structural diagram of the fluorescence wheel of the present invention.
The reference numbers illustrate:
1. a first light source; 11. a first laser; 12. a second laser; 13. fluorescence; 2. a second light source; 21. a third laser; 3. a transmissive fluorescent wheel; 31. a fluorescent region; 32. a transmissive region; 4. a dichroic sheet; 5. and a light uniformizing part.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
The present invention provides an embodiment of a laser light source device, as shown in fig. 1, including a first light source 1, a second light source 2, a transmission fluorescent wheel 3, a dichroic sheet 4, and a light uniformizing member 5. The first light source 1 is used for emitting a first laser 11 and a second laser 12 with different colors. The second light source 2 is used for emitting third laser light 21 with the color different from that of the first laser light 11 and the second laser light 12; the laser emergent light path of the second light source 2 is perpendicular to the laser emergent light path of the first light source 1.
The transmission fluorescent wheel 3 is disposed on the laser emitting light path of the first light source 1, as shown in fig. 2, the transmission fluorescent wheel 3 includes a fluorescent area 31 and a transmission area 32, the fluorescent area 31 is used for being excited by the first laser light 11 to emit fluorescent light 13, and the transmission area 32 is used for transmitting the first laser light 11 and the second laser light 12.
The dichroic filter 4 is disposed in the light emitting direction of the transmission luminescent wheel 3 and the second light source 2, and transmits the third laser light 21 and reflects the luminescent light 13, the first laser light 11, and the second laser light 12 emitted from the transmission luminescent wheel 3.
The dodging unit 5 is configured to receive the third laser light 21 transmitted by the dichroic filter 4 and the fluorescent light 13, the first laser light 11 and the second laser light 12 reflected by the dichroic filter 4.
In particular, the first light source 1 comprises two lasers, i.e. a first laser for emitting first laser light 11 of a first color and a second laser for emitting second laser light 12 of a second color, which may emit different colors. The first laser and the second laser are arranged at the same position. The second light source 2 comprises a third laser for emitting third laser light 21 of a third color.
The transmission fluorescent wheel 3 is driven to rotate by a motor and the like, the transmission fluorescent wheel 3 comprises a fluorescent area 31 and a transmission area 32, and the fluorescent area 31 and the transmission area 32 are positioned on the same circular ring of the transmission fluorescent wheel 3 and are positioned on the outer circumference of the transmission fluorescent wheel 3. The fluorescent area 31 is provided with fluorescent powder for exciting fluorescence 13 by laser, and the transmission area 32 is made of transparent glass or quartz material and is used for providing an independent channel for the transmission of laser. In the rotation sequence of the transmission fluorescent wheel 3, the excitation light source (the first laser 11) is incident on the transmission area 32 for a certain period of time, and is incident on the fluorescent area 31 for a certain period of time, when the excitation light source is incident on the transmission area 32, the transmission area 32 transmits the first laser 11, and when the excitation light source is incident on the fluorescent area 31, the fluorescent area 31 is excited by the first laser 11 to emit fluorescent light 13, and is emitted from the transmission fluorescent wheel 3; the second laser light 12 is irradiated only to the transmissive area 32, and the second laser light 12 is transmitted through the transmissive area 32.
The transmission fluorescence wheel 3 comprises a first surface and a second surface which are oppositely arranged, wherein the first surface is a light inlet side, and the second surface is a light outlet side; the first surface of the fluorescent region 31 is provided with a coating layer for transmitting the first laser 11 and reflecting the fluorescent light 13, and the second surface of the fluorescent region 31 is provided with yellow fluorescent powder.
The first surface of the transmission fluorescent wheel 3 is the light incident side, and the second surface is the light emitting side, that is, the first light source 1 is incident from the first surface of the transmission fluorescent wheel 3, and the fluorescence 13, the first laser beam 11, and the second laser beam 12 are emitted from the second surface. The fluorescent area 31 on the second surface is provided with yellow fluorescent powder, the yellow fluorescent powder which is transmitted by blue laser from the first surface of the fluorescent area 31 to the second surface of the fluorescent area 31 excites yellow fluorescent light, the emission direction of the fluorescent light 13 is multidirectional, and in order to reduce the loss of the fluorescent light 13, the fluorescent area 31 on the first surface is provided with a coating layer which can be a dichroic film and is used for transmitting the blue laser with high transmissivity and reflecting part of the fluorescent light 13 which is incident from the blue laser to the coating layer, so that the fluorescent light 13 is totally emitted from the second surface of the transmission fluorescent wheel 3.
The first light source 2 may include a laser emitting 640nm red laser, and since the 640nm red laser does not overlap with the yellow fluorescent light, efficiency loss caused by a dichroic filter due to spectrum overlapping is avoided.
The first surface of the transmissive region 32 is provided with a diffusion layer for scattering laser light. The diffusion layer is a particle coating which has a scattering effect on laser, and the particle coating can be a particle coating which has a scattering effect on laser in a certain range of wave bands, can also be a particle coating which has a scattering effect on laser with specific wavelength, and can also be a particle coating which has a scattering effect on all wave bands. The particle coating may be, but is not limited to, a barium sulfate particle coating that is capable of high scattering of a range of wavelengths of laser light. The divergence angle and direction of the laser can be changed by arranging the diffusion layer, so that the laser with collimation can be changed into different directions.
Optionally, a diffusion layer for scattering laser light is disposed on the surface of the coating layer of the fluorescent region 31. The diffusion layer of the phosphor region 31 may scatter the blue laser light entering the phosphor region.
The dichroic plate 4 is disposed in the light emitting direction of the transmission fluorescent wheel 3 and the second light source 2, the transmission fluorescent wheel 3 and the second light source 2 are respectively disposed at both sides of the dichroic plate 4, the third laser light 21 emitted from the second light source 2 is incident on a first side surface of the dichroic plate 4 and is transmitted from the dichroic plate 4, the fluorescent light, the first laser light 11, and the second laser light 12 are incident on a second side surface of the dichroic plate 4 and are reflected from the second side surface of the dichroic plate 4, the second side surface is disposed opposite to the first side surface, that is, the laser light emitted from the dichroic plate 4 includes the fluorescent light 13, the first laser light 11, the second laser light 12, and the third laser light 21.
The light homogenizing component 5 is arranged in the light emitting direction of the dichroic sheet 4, and is used for collecting the third laser light 21 transmitted by the dichroic sheet 4 and the fluorescent light 13, the first laser light 11 and the second laser light 12 reflected by the dichroic sheet 4, and mixing the fluorescent light 13, the first laser light 11, the second laser light 12 and the third laser light 13 uniformly and then injecting the mixture onto a projection display chip. The shape of the light homogenizing member 5 may be set according to the shape of the projection display chip, such as a circular light column, a square light column, or a light cone. If the light uniformizing element 5 is a light cone, the light entrance of the light cone is smaller than the light exit of the light cone, and the light entrance of the light cone is smaller than the light exit of the light cone, so that the light beam emitted from the light exit of the light cone can be compressed by the emission angle according to the principle of invariant etendue.
In this scheme, set up first light source and second light source separately, third laser 21 can select with fluorescence 13, the non-overlapping laser of first laser 11 and second laser 12 frequency spectrum, make dichroic sheet 4 can transmit third laser 21, and reflect fluorescence 13, first laser 11 and second laser 12, when giving consideration to colour gamut and luminance, not only can prevent the optical efficiency loss, and compare in the design that sets up a plurality of adjustment structures etc. among the prior art, the laser light source structure has been simplified, be favorable to overall size's reduction, the miniaturization of laser light source device has been realized.
As an example, the first light source 1 includes a blue laser light source and a green laser light source, the blue laser light source emits the first laser light 11, the green laser light source emits the second laser light 12, that is, the first laser light 11 is a blue laser light, and the second laser light 12 is a green laser light. The second light source 2 includes a red laser light source that emits red laser light, that is, the third laser light 21 is red laser light.
According to the spectrogram of visible light, the wavelength range of red light is 625-740nm, the wavelength range of green light is 491-574nm, the wavelength range of blue light is 424-490nm, and the wavelength range of yellow light is 575-584nm, and the blue laser and the green laser are used as the first light source 1 and are incident on the transmission fluorescence wheel 3, and the wavelength of the blue laser is short and is usually used as laser excitation light to excite the fluorescent powder to generate fluorescence 13 with longer wavelength, such as yellow fluorescence. The dichroic plate 4 can be set to transmit laser with a wavelength larger than about 600nm and reflect laser with a wavelength smaller than about 600nm, that is, transmit red laser, that is, reflect yellow fluorescent light, green laser and blue laser, and then the red laser, the yellow fluorescent light, the green laser and the blue laser emitted from the dichroic plate 4 are collected by the light uniformizing component 5 and are uniformly mixed to be emitted to the projection display chip to be used as a light source of the projection display system.
As another example, the first laser light 11 is red laser light, the second laser light 12 is green laser light, the third laser light 21 is blue laser light, and the dichroic sheet 4 may be configured to transmit laser light having a wavelength of less than about 490nm, reflect laser light having a wavelength of more than about 490nm, that is, transmit blue laser light, and reflect green, yellow, and red laser light. However, the red laser light is used as the excitation light for exciting the fluorescence 13, and the efficiency thereof is lower than that of the blue laser light.
In some embodiments of the present invention, the transmission fluorescent wheel 3 is disposed perpendicular to the light emitting direction of the first light source 1; the angle between the dichroic plate 4 and the transmission fluorescent wheel 3 is 35-55 deg. Preferably, the angle between the dichroic plate 4 and the transmissive fluorescence wheel 3 is 45 degrees.
Specifically, the light emitting direction of the first light source 1 is perpendicular to the light emitting direction of the second light source 2, the transmission fluorescent wheel 3 is perpendicular to the light emitting direction of the first light source 1, the included angle between the dichroic plate 4 and the transmission fluorescent wheel 3 is 35-55 °, the light path direction of the first light source 1 after passing through the transmission fluorescent wheel 3 and the dichroic plate 4 is parallel to the light path direction of the second light source 2 after passing through the dichroic plate 4, that is, the first laser 11, the second laser 12, the third laser 21 and the fluorescent light 13 after passing through the dichroic plate 4 are parallel to each other, so that the plurality of laser lights can be collected by the dodging component 5.
The utility model also provides an embodiment of projection display system, including the laser light source device of above-mentioned embodiment. The dodging component 5 in the laser source device mixes the fluorescence 13, the first laser 11, the second laser 12 and the third laser 21 uniformly and then injects the mixture onto the projection display chip as a light source of the projection display chip.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (8)
1. A laser light source device, comprising:
a first light source for emitting first laser light and second laser light of different colors;
the second light source is used for emitting third laser with a preset wavelength, and a laser emergent light path of the second light source is perpendicular to a laser emergent light path of the first light source;
the transmission fluorescent wheel is arranged on a laser emergent light path of the first light source and comprises a fluorescent area and a transmission area, the fluorescent area is excited by the first laser to emit fluorescent light, and the transmission area is used for transmitting the first laser and the second laser;
a dichroic plate disposed in a light emitting direction of the transmission luminescent wheel and the second light source, for transmitting the third laser light and reflecting the luminescent light emitted from the transmission luminescent wheel, the first laser light, and the second laser light;
a light uniformizing unit for receiving the third laser light transmitted by the dichroic sheet and the fluorescent light, the first laser light and the second laser light reflected by the dichroic sheet.
2. The laser light source device according to claim 1,
the first light source comprises a blue laser light source and a green laser light source, the blue laser light source emits the first laser, and the green laser light source emits the second laser.
3. The laser light source device according to claim 2, wherein the third laser is a red laser; the preset wavelength is a wavelength which is not overlapped with the second laser.
4. The laser light source device according to claim 1,
the transmission fluorescent wheel comprises a first surface and a second surface which are oppositely arranged, the first surface is a light inlet side, and the second surface is a light outlet side;
the first surface of the fluorescence area is provided with a coating layer for transmitting the first laser and reflecting the fluorescence, and the second surface of the fluorescence area is provided with yellow fluorescent powder.
5. The laser light source device according to claim 4,
the first surface of the transmission region is provided with a diffusion layer for scattering laser; and/or;
and a diffusion layer for scattering laser is arranged on the surface of the coating layer of the fluorescent region.
6. The laser light source device according to claim 1,
the transmission fluorescent wheel is perpendicular to the light emitting direction of the first light source;
the included angle between the dichroic sheet and the transmission fluorescent wheel is 35-55 degrees.
7. The laser light source device according to claim 1, wherein the light homogenizing member is a light pillar or a light cone.
8. A projection display system comprising the laser light source device according to any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202022233315.4U CN213182297U (en) | 2020-10-09 | 2020-10-09 | Laser light source device and projection display system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022233315.4U CN213182297U (en) | 2020-10-09 | 2020-10-09 | Laser light source device and projection display system |
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| CN213182297U true CN213182297U (en) | 2021-05-11 |
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| CN202022233315.4U Active CN213182297U (en) | 2020-10-09 | 2020-10-09 | Laser light source device and projection display system |
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