CN108565676B - Laser light source and display device - Google Patents
Laser light source and display device Download PDFInfo
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- CN108565676B CN108565676B CN201810622378.3A CN201810622378A CN108565676B CN 108565676 B CN108565676 B CN 108565676B CN 201810622378 A CN201810622378 A CN 201810622378A CN 108565676 B CN108565676 B CN 108565676B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01S—DEVICES USING THE PROCESS OF LIGHT AMPLIFICATION BY STIMULATED EMISSION OF RADIATION [LASER] TO AMPLIFY OR GENERATE LIGHT; DEVICES USING STIMULATED EMISSION OF ELECTROMAGNETIC RADIATION IN WAVE RANGES OTHER THAN OPTICAL
- H01S5/00—Semiconductor lasers
- H01S5/40—Arrangement of two or more semiconductor lasers, not provided for in groups H01S5/02 - H01S5/30
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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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- Optical Modulation, Optical Deflection, Nonlinear Optics, Optical Demodulation, Optical Logic Elements (AREA)
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Abstract
The invention discloses a laser light source, which comprises a first light part, a second light part, a wavelength conversion part and a light combining part; the first light part is used for emitting three primary color laser; the second light part is used for emitting laser to irradiate the wavelength conversion part; the wavelength conversion unit is configured to generate at least one primary color light upon irradiation with the laser light emitted from the second light unit, and the light combining unit is configured to combine the three primary color laser light and the light generated by the wavelength conversion unit and output the combined light. The laser light source can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light part can be adjusted through the light generated by the wavelength conversion part, the color gamut range of the light source output light is further adjusted, the output light can meet the standard color gamut range, compared with the prior art, color management is not needed, and the light utilization rate is high. The invention also discloses a display device comprising the laser light source.
Description
Technical Field
The invention relates to the technical field of laser display, in particular to a laser light source. The invention also relates to a display device.
Background
The laser has the characteristics of high brightness, narrow wave band, small optical expansion and the like, so that the laser has wide application prospect in the laser display field and the laser illumination field.
In the prior art, the application of laser as a light source of a display device mainly comprises the following two schemes:
the first scheme is as follows: the red, green and blue laser light sources are respectively adopted to output light, the white light is obtained by merging, green light with the wavelength of about 520nm, red light with the wavelength of about 638nm and blue light with the wavelength of about 465nm are generally selected, and the color gamut obtained by merging is fixed because the wavelengths of the three-color lasers are fixed. However, this solution has the following drawbacks: the wavelength of the output light of the three laser light sources is fixed, the maximum achievable color gamut range is determined, the obtained color gamut range is larger than the standard color gamut range, and in order to meet the requirement of the standard color gamut range in practical application, color management can be performed in the display device, so that the brightness of the output light is weaker than the original brightness, and the light utilization rate is low.
The second scheme is as follows: the blue light is used to irradiate wavelength conversion device such as fluorescent powder material to generate yellow light, and then the yellow light is used to separate green light and red light or the blue light is directly converted into green light and red light, and the green light and the red light are combined with original blue light laser to be input into the display device. According to the scheme, green light and red light are obtained through the wavelength conversion device, the obtained color gamut range is smaller than the standard color gamut range, filtering is conducted to achieve the standard color gamut range, light with specific wavelength affecting the color gamut is filtered, the filtered light is input into the display device, the brightness of the output light is weakened compared with the original brightness through filtering, and the light utilization rate is low.
Disclosure of Invention
The invention aims to provide a laser light source, the output light can meet the standard color gamut range, and compared with the prior art, the laser light source has high light utilization rate. The invention also provides a display device.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a laser light source comprises a first light part, a second light part, a wavelength conversion part and a light combining part;
the first light part is used for emitting three primary color laser;
the second light part is used for emitting laser to irradiate the wavelength conversion part;
the wavelength conversion part is used for generating at least one primary color light after being irradiated by the laser emitted by the second light part;
the light combining unit is configured to combine the three primary color lasers and output the combined light generated by the wavelength conversion unit.
Preferably, the first light unit includes an output unit for outputting laser light of three primary colors, and the second light unit includes an output unit for outputting laser light.
Preferably, the first optical part includes at least two output parts, each of which outputs the laser light of three primary colors, and the second optical part includes an output part outputting the laser light.
Preferably, the first light section includes at least three output sections, each of which outputs one primary color laser light.
Preferably, the first optical part further includes an optical component disposed corresponding to the output part for collimating the laser light output from the output part, and the second optical part further includes an optical component disposed corresponding to the output part for collimating the laser light output from the output part.
Preferably, the output part is an optical fiber or a laser.
Preferably, the wavelength converting region includes:
a wavelength conversion element which generates at least one primary color light after being irradiated with the laser light emitted from the second light portion;
and an optical component for collimating the light generated by the wavelength conversion element and guiding the light to enter the light combining part.
Preferably, the light output from the first light unit and the light emitted from the wavelength conversion unit are irradiated to the light combining unit, the light combining unit transmits the light output from the first light unit, and the light combining unit reflects the light emitted from the wavelength conversion unit so as to combine and output the three primary color laser light and the light generated from the wavelength conversion unit.
Preferably, the light source further comprises a light reflecting element, the first light part and the second light part are arranged side by side, the light output by the second light part is incident on the light reflecting element, and the light reflecting element reflects the light to the wavelength conversion part.
A display device comprising the laser light source described above.
As can be seen from the above technical solution, the laser light source provided by the present invention includes a first light portion, a second light portion, a wavelength conversion portion and a light combining portion; the first light unit emits three primary color laser light, the second light unit emits laser light to the wavelength conversion unit, the wavelength conversion unit emits at least one primary color light, and the light combination unit combines the three primary color laser light and the light generated by the wavelength conversion unit and outputs the combined light.
The laser light source provided by the invention has the advantages that the wavelength conversion part can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light part can be adjusted through the light generated by the wavelength conversion part, the color gamut range of the light source output light is further adjusted, the output light can meet the standard color gamut range, and compared with the prior art, the laser light source does not need to carry out color management, and the light utilization rate is high.
The invention also provides a display device which can achieve the beneficial effects.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a laser source according to an embodiment of the present invention;
FIG. 2 is a schematic view of a laser light source according to a first embodiment of the present invention;
FIG. 3 is a schematic view of a laser light source according to a second embodiment of the present invention;
FIG. 4 is a schematic view of a laser light source according to a third embodiment of the present invention;
FIG. 5 is a graph showing the color gamut of light output by a light source in accordance with one embodiment of the present invention;
fig. 6 is a spectrum of light output from a light source in accordance with an embodiment of the present invention.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a laser light source according to the present embodiment. As can be seen from the figure, the laser light source provided in this embodiment includes a first light portion 10, a second light portion 11, a wavelength conversion portion 12, and a light combining portion 13.
The first light part 10 is used for emitting three primary colors of laser light.
The second light unit 11 is configured to emit laser light to irradiate the wavelength conversion unit 12.
The wavelength conversion unit 12 is configured to generate at least one primary color light upon irradiation with the laser light emitted from the second light unit 11.
The light combining section 13 combines and outputs the light generated by the three primary color laser light and the wavelength conversion section 12.
The wavelength conversion unit is a member capable of generating light in a specific wavelength range when irradiated with light of a specific wavelength. In the laser light source of this embodiment, the first light portion emits the three primary color laser light, the second light portion emits the laser light to the wavelength conversion portion, and the wavelength conversion portion emits at least one primary color light under the light irradiation. The light generated by the three primary color laser light and the wavelength conversion unit emitted from the first light unit is incident on the light combining unit, and the light generated by the three primary color laser light and the wavelength conversion unit is combined by the light combining unit and output.
The wavelength conversion part can generate at least one primary color light, the laser light source can adjust the proportion of corresponding primary color light in the three primary color lasers emitted by the first light part through the light generated by the wavelength conversion part, so as to adjust the color gamut range of the light source output light, and the output light can meet the standard color gamut range.
In addition, in the prior art, due to the correlation of the laser light sources in the first scheme, after the light output by the light sources is reflected by a screen with wavelength level roughness, laser speckles can be formed on human eyes, and the image quality is seriously affected by the speckles. In the laser light source, the light generated by the wavelength conversion part is added, so that the spectrum of the converged light is enriched, and the scattered plate phenomenon can be weakened.
The laser light source of the present invention will be described in detail with reference to the following detailed description and the accompanying drawings.
In the first embodiment, referring to fig. 2, the laser light source includes a first light portion 20, a second light portion 21, a wavelength conversion portion 22, and a light combining portion 23.
The first light portion 20 is for emitting laser light of three primary colors. The three primary colors may be red light, green light and blue light, or the three primary colors emitted by the first light portion may be other three primary colors, which are all within the scope of the present invention. Specifically, the first light unit 20 includes one output unit 200 for outputting three primary color laser light, and the three primary color laser light are output together by the output unit 200. In a specific implementation, the output portion 200 may continuously output three primary colors of light simultaneously, or the output portion 200 may sequentially output three primary colors of light according to a preset timing sequence, which may be set accordingly according to needs in practical applications.
The second light portion 21 is for emitting laser light to irradiate the wavelength converting region 22. Specifically, the second optical section 21 includes an output section 210 that outputs laser light, and the output section 210 outputs laser light.
Alternatively, the output 200 and the output 210 may be optical fibers or lasers.
Preferably, the first optical part 20 further includes an optical assembly 201 provided corresponding to the output part 200 for collimating the laser light output from the output part 200. The output light is collimated by the optical assembly 201 so that the light propagation directions are parallel and the light energy is concentrated and uniform.
The second light section 21 further includes an optical component 211 provided corresponding to the output section 210 for collimating the laser light output from the output section 210. The output light is collimated by the optical element 211 so that the light propagation directions are parallel and the light energy is concentrated and uniform.
In particular embodiments, the optical assemblies 201, 211 may include lenses, prisms, diaphragms, or other optical elements, and are within the scope of the present invention.
The wavelength conversion unit 22 generates at least one primary color light when irradiated with the laser light emitted from the second light unit 21. Specifically, the wavelength conversion unit 22 may be configured to generate one primary color light under light irradiation, and the generated primary color light color coordinates deviate from the corresponding primary color light color coordinates outputted from the first light unit, and the generated light from the wavelength conversion unit 22 merges with the three primary colors emitted from the first light unit, so that the ratio of each primary color light in the three primary colors can be adjusted, and the color gamut of the light outputted from the light source can be adjusted. Alternatively, the wavelength conversion unit 22 may be configured to generate light including two primary colors under light irradiation, and the light generated by the wavelength conversion unit 22 may be combined with the three primary colors emitted from the first light unit, so that the ratio of the respective primary colors in the three primary colors may be adjusted, and the color gamut of the light source output light may be adjusted. In practical application, the above-mentioned various color mixing schemes can be selected according to requirements.
Preferably, referring to fig. 2, the wavelength converting region 22 may include: a wavelength conversion element 220 that generates at least one primary color light upon irradiation with the laser light emitted from the second light portion 21; the light generated by the wavelength conversion element 220 is collimated and then guided to enter the optical module 221 of the light combining unit 23. The wavelength conversion element 220 emits light when irradiated with light, and the optical component 221 collimates the light so that the light propagation direction is parallel, and the light energy is concentrated and uniform, and enters the light combining section 23.
Alternatively, the wavelength conversion element 220 may be made of a fluorescent material, which may be a ceramic fluorescent material, a crystalline fluorescent material, or a fluorescent material formed by mixing an organic gel or an inorganic gel with a fluorescent powder, but the present invention is not limited thereto, and may be made of other types of wavelength conversion materials. The optical assembly 221 may include lenses, prisms, diaphragms, or other optical elements and are within the scope of the present invention.
The light combining section 23 combines the light generated by the three primary color laser light emitted by the first light section 20 and outputs the combined light. In a specific implementation, the light output by the first light unit 20 and the light emitted by the wavelength conversion unit 22 may be provided to the light combining unit 23, the light combining unit 23 transmits the light output by the first light unit 20, and the light combining unit 23 reflects the light emitted by the wavelength conversion unit 22 to combine the light generated by the three primary color laser light and the light generated by the wavelength conversion unit and output the combined light.
Alternatively, the light combining unit 23 may employ a beam combining lens, and the beam combining lens used may be capable of transmitting the light emitted from the first light unit, and reflecting the light generated by the wavelength converting unit, so as to combine the two light paths.
Alternatively, the light combining portion 23 may be a lens with a partially coated reflective film, and may be partially transmissive or partially reflective, but is not limited thereto, and other light combining elements may be used, which are also within the scope of the present invention.
In addition, in the implementation, the positions of the components and the optical path layout can be correspondingly arranged according to the structural design of the light source. For example, as shown in fig. 2, the first light portion 20 and the second light portion 21 may be arranged side by side, and the light emitted from the first light portion 20 is directly irradiated to the light combining portion 23. The light source further comprises a reflecting element 24, the light output by the second light part 21 is incident on the reflecting element 24, and the reflecting element 24 reflects the light to the wavelength converting region 22. The light emitted from the wavelength conversion unit 22 is irradiated to the light combining unit 23 and reflected, and the light output from the first light unit 20 is incident to the light combining unit 23 and transmitted. It is understood that other optical arrangements and other optical components for optical arrangements may be used in other embodiments and are within the scope of the present invention.
It can be seen that, in the laser light source provided in this embodiment, the wavelength conversion portion can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light portion can be adjusted by the light generated by the wavelength conversion portion, and then the color gamut range of the light source output light is adjusted, so that the output light can meet the standard color gamut range, and compared with the prior art, color management is not required, and the light utilization rate is high.
In the second embodiment, referring to fig. 3, the laser light source includes a first light portion 30, a second light portion 31, a wavelength conversion portion 32, and a light combining portion 33.
The first light section 30 is configured to emit laser light of three primary colors. The three primary colors of light may be red, green, and blue. Specifically, the first light section 30 includes at least two output sections 300, and each output section 300 outputs three primary color laser light. Each output unit 300 outputs three primary color lasers together, and the light output from each output unit 300 is incident on the light combining unit 33 together, which contributes to the formation of white light having more uniform energy and spectral distribution. In specific implementation, the number of the output units 300 may be set according to practical situations, and may include three or four output units or other numbers, which is not limited in this embodiment. In addition, in the embodiment, the output part 300 may continuously output three primary colors of light simultaneously, or the output part 300 may sequentially output three primary colors of light according to a preset timing, which may be set according to the needs in practical applications.
The second light portion 31 is for emitting laser light to irradiate the wavelength converting region 32. Specifically, the second optical section 31 includes an output section 310 for outputting laser light, and the output section 310 outputs laser light.
Alternatively, the output 300 and the output 310 may be optical fibers or lasers.
Preferably, the first optical part 30 further includes an optical assembly 301 provided corresponding to the output part 300 for collimating the laser light output from the output part 300. The output light is collimated by the optical assembly 301 so that the light propagation directions are parallel and the light energy is concentrated and uniform.
The second light section 31 further includes an optical component 311 provided corresponding to the output section 310 for collimating the laser light output from the output section 310. The output light is collimated by the optical element 311, the light propagation direction is parallel, and the light energy is concentrated and uniform.
In particular embodiments, optical components 301, 311 may include lenses, prisms, diaphragms, or other optical elements, and are within the scope of the present invention.
The wavelength conversion unit 32 is irradiated with the laser light emitted from the second light unit 31 to generate at least one primary color light. Specifically, the wavelength conversion unit 32 may be configured to generate one primary color light under light irradiation, and the generated primary color light color coordinates deviate from the corresponding primary color light color coordinates outputted from the first light unit, and the light generated by the wavelength conversion unit 32 merges with the three primary colors emitted from the first light unit, so that the ratio of each primary color light in the three primary colors can be adjusted, and the color gamut of the light outputted from the light source can be adjusted. Alternatively, the wavelength conversion unit 32 may be configured to generate light including two primary colors under light irradiation, and the light generated by the wavelength conversion unit 32 may be combined with the three primary colors emitted from the first light unit, so that the ratio of the respective primary colors in the three primary colors may be adjusted, and the color gamut of the light source output light may be adjusted. In practical application, the above-mentioned various color mixing schemes can be selected according to requirements.
Preferably, referring to fig. 3, the wavelength converting region 32 may include: a wavelength conversion element 320 that generates at least one primary color light upon irradiation with the laser light emitted from the second light portion 31; the light generated by the wavelength conversion element 320 is collimated and then guided to enter the optical module 321 of the light combining unit 33. The wavelength conversion element 320 emits light when irradiated with light, and the optical component 321 collimates the light so that the light propagation direction is parallel, and the light energy is concentrated and uniform and enters the light combining section 23.
Alternatively, the wavelength conversion element 320 may be made of a fluorescent material, which may be a ceramic fluorescent material, a crystalline fluorescent material, or a fluorescent material formed by mixing an organic gel or an inorganic gel with a fluorescent powder, but the present invention is not limited thereto, and may be made of other types of wavelength conversion materials. The optical assembly 321 may comprise lenses, prisms, diaphragms, or other optical elements and is within the scope of the present invention.
The light combining section 33 combines the three primary color laser light emitted from the first light section 30 and the light generated by the wavelength converting section 32, and outputs the combined light. In a specific implementation, the light output by the first light unit 30 and the light emitted by the wavelength conversion unit 32 may be provided to the light combining unit 33, the light combining unit 33 transmits the light output by the first light unit 30, and the light combining unit 33 reflects the light emitted by the wavelength conversion unit 32 to combine the light generated by the three primary color laser light and the light generated by the wavelength conversion unit and output the combined light.
Alternatively, the light combining unit 33 may employ a beam combining lens, and the beam combining lens used may be capable of transmitting the light emitted from the first light unit, and reflecting the light generated from the wavelength converting unit. Alternatively, the light combining portion 33 may be a partially reflective film coated lens, partially transmissive, or partially reflective, but is not limited thereto, and other light combining elements may be used, which are also within the scope of the present invention.
In addition, in the implementation, the positions of the components and the optical path layout can be correspondingly arranged according to the structural design of the light source. For example, as shown in fig. 3, the first light portion 30 and the second light portion 31 may be arranged side by side, and the light emitted from the first light portion 30 is directly irradiated to the light combining portion 33. The light source further includes a light reflecting element 34, the light outputted from the second light portion 31 is incident on the light reflecting element 34, and the light reflecting element 34 reflects the light to the wavelength converting region 32. The light emitted from the wavelength conversion unit 32 is irradiated to the light combining unit 33 and reflected, and the light output from the first light unit 30 is incident to the light combining unit 33 and transmitted. It is understood that other optical arrangements and optical arrangements may be used and other optical components may be used in other embodiments and are within the scope of the present invention.
It can be seen that, in the laser light source provided in this embodiment, the wavelength conversion portion can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light portion can be adjusted by the light generated by the wavelength conversion portion, and then the color gamut range of the light source output light is adjusted, so that the output light can meet the standard color gamut range, and compared with the prior art, color management is not required, and the light utilization rate is high.
In the third embodiment, referring to fig. 4, the laser light source includes a first light portion 40, a second light portion 41, a wavelength conversion portion 42, and a light combining portion 43.
The first light portion 40 is for emitting laser light of three primary colors. The three primary colors of light may be red, green, and blue. Specifically, the first light portion includes at least three output portions, each of which outputs one primary color laser light, and the at least three output portions included are capable of outputting three primary colors of light. In specific implementation, the number of output parts for outputting each primary color light can be flexibly set, and can be correspondingly set according to the power of each color light source. In the laser light source shown in fig. 4, the first light unit 40 includes three output units 400 as an example.
In specific implementation, each output part can be set to output light simultaneously, or each output part can be set to output light sequentially according to a preset time sequence, and the output parts can be correspondingly set according to requirements in practical application.
The second light portion 41 is for emitting laser light to irradiate the wavelength converting region 42. Specifically, the second optical section 41 includes an output section 410 for outputting laser light, and the output section 410 outputs laser light.
Alternatively, the output 400 and the output 410 may be optical fibers or lasers.
Preferably, the first optical part 40 further includes an optical assembly 401 provided corresponding to the output part 400 for collimating the laser light output from the output part 400. The output light is collimated by the optical assembly 401 so that the light propagation directions are parallel and the light energy is concentrated and uniform.
The second light section 41 further includes an optical component 411 provided corresponding to the output section 410 for collimating the laser light output from the output section 410. The output light is collimated by the optical assembly 411 so that the light propagation directions are parallel and the light energy is concentrated and uniform.
In particular embodiments, optical assembly 401, 411 may include lenses, prisms, diaphragms, or other optical elements, and are within the scope of the present invention.
The wavelength conversion unit 42 generates at least one primary color light when irradiated with the laser light emitted from the second light unit 41. Specifically, the wavelength conversion unit 42 may be configured to generate one primary color light under light irradiation, and the generated primary color light color coordinates deviate from the corresponding primary color light color coordinates outputted from the first light unit, and the light generated by the wavelength conversion unit 42 merges with the three primary colors emitted from the first light unit, so that the ratio of each primary color light in the three primary colors can be adjusted, and the color gamut of the light outputted from the light source can be adjusted. Alternatively, the wavelength conversion unit 42 may be configured to generate light including two primary colors under light irradiation, and the light generated by the wavelength conversion unit 42 may be combined with the three primary colors emitted from the first light unit, so that the ratio of the respective primary colors in the three primary colors may be adjusted, and the color gamut of the light source output light may be adjusted. In practical application, the above-mentioned various color mixing schemes can be selected according to requirements.
Preferably, referring to fig. 4, the wavelength converting region 42 may include: a wavelength conversion element 420 that generates at least one primary color light upon irradiation with the laser light emitted from the second light portion 41; an optical module 421 for collimating light generated by the wavelength conversion element 420 and guiding the collimated light to enter the light combining section 43. The wavelength conversion element 420 emits light when irradiated with light, and the optical module 421 collimates the light so that the light propagation direction is parallel, and the light energy is concentrated and uniform, and enters the light combining unit 43.
Alternatively, the wavelength conversion element 420 may be made of a fluorescent material, which may be a ceramic fluorescent material, a crystalline fluorescent material, or a fluorescent material formed by mixing an organic gel or an inorganic gel with a fluorescent powder, but the present invention is not limited thereto, and may be made of other types of wavelength conversion materials. Optical assembly 421 may include lenses, prisms, diaphragms, or other optical elements and is within the scope of the present invention.
The light combining section 43 combines the three primary color lasers emitted from the first light section 40 and outputs the combined light generated by the wavelength converting section 42. In a specific implementation, the light output by the first light unit 40 and the light emitted by the wavelength conversion unit 42 may be provided to the light combining unit 43, the light combining unit 43 transmits the light output by the first light unit 40, and the light combining unit 43 reflects the light emitted by the wavelength conversion unit 42 to combine the light generated by the three primary color laser light and the light generated by the wavelength conversion unit and output the combined light.
Alternatively, the light combining part 43 may employ a beam combining lens, and the beam combining lens used can transmit the light emitted by the first light part, and can reflect the light generated by the wavelength converting part.
Alternatively, the light combining portion 43 may be a lens with a partially coated reflective film, and may be partially transmissive or partially reflective, but is not limited thereto, and other light combining elements may be used, which are also within the scope of the present invention.
In addition, in the implementation, the positions of the components and the optical path layout can be correspondingly arranged according to the structural design of the light source. For example, as shown in fig. 4, the first light portion 40 and the second light portion 41 may be arranged side by side, and the light emitted from the first light portion 40 is directly irradiated to the light combining portion 43. The light source further includes a reflecting element 44, the light outputted from the second light portion 41 is incident on the reflecting element 44, and the reflecting element 44 reflects the light to the wavelength converting region 42. The light emitted from the wavelength conversion unit 42 is irradiated to the light combining unit 43 and reflected, and the light output from the first light unit 40 is incident to the light combining unit 43 and transmitted. It is understood that other optical arrangements and optical arrangements may be used and other optical components may be used in other embodiments and are within the scope of the present invention.
It can be seen that, in the laser light source provided in this embodiment, the wavelength conversion portion can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light portion can be adjusted by the light generated by the wavelength conversion portion, and then the color gamut range of the light source output light is adjusted, so that the output light can meet the standard color gamut range, and compared with the prior art, color management is not required, and the light utilization rate is high.
In one specific example, the first light portion of the laser light source emits three primary colors of red light, green light, and blue light, and the second light portion emits blue light. The wavelength converting region emits yellow light (which may be mixed by red and green light) upon bombardment by blue light. The light combining section combines the three primary color laser light emitted from the first light section and the yellow light generated by the wavelength conversion section, and outputs the combined light. Referring to fig. 5, fig. 5 shows a color gamut of light output from the light source in this embodiment, where a point a represents a color coordinate point of the first light portion emitting red light, B point B represents a color coordinate point of the first light portion emitting green light, and C point C represents a color coordinate point of the wavelength converting portion emitting yellow light. After the yellow light and the original light are converged, the color coordinate point of the red light is moved from the point A to the point A ', the color coordinate point of the green light is moved from the point B to the point B', and the color gamut range of the light output by the light source is reduced by adjustment, so that the standard color gamut range can be met. Referring to fig. 6, fig. 6 shows a spectrum of light output from the light source in this embodiment, and it can be seen that the bandwidth of the wavelength of light output from the light source is greatly increased, so as to avoid the speckle phenomenon.
Correspondingly, the embodiment of the invention also provides a display device which comprises the laser light source.
In the display device provided by the embodiment, the wavelength conversion part of the adopted laser light source can generate at least one primary color light, the proportion of the corresponding primary color light in the three primary color lasers emitted by the first light part can be adjusted through the light generated by the wavelength conversion part, the color gamut range of the light source output light is further adjusted, the output light can meet the standard color gamut range, and compared with the prior art, the color management is not needed, and the light utilization rate is high.
The laser light source and the display device provided by the invention are described in detail above. The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the method of the present invention and its core ideas. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the invention can be made without departing from the principles of the invention and these modifications and adaptations are intended to be within the scope of the invention as defined in the following claims.
Claims (10)
1. A laser light source is characterized by comprising a first light part, a second light part, a wavelength conversion part and a light combining part;
the first light part is used for emitting three primary color laser;
the second light part is used for emitting laser to irradiate the wavelength conversion part;
the wavelength conversion part is used for generating at least one primary color light after being irradiated by the laser emitted by the second light part, the wavelength conversion part generates one primary color light under the irradiation of the laser emitted by the second light part, the generated primary color light color coordinates deviate from the corresponding primary color light color coordinates emitted by the first light part, or the wavelength conversion part generates light containing two primary color lights under the irradiation of the laser emitted by the second light part;
the light combining unit is configured to combine the three primary color lasers and output the combined light generated by the wavelength conversion unit.
2. The laser light source according to claim 1, wherein the first light portion includes an output portion that outputs laser light of three primary colors, and the second light portion includes an output portion that outputs laser light.
3. The laser light source according to claim 1, wherein the first light portion includes at least two output portions each outputting a laser light of three primary colors, and the second light portion includes an output portion outputting a laser light.
4. The laser light source according to claim 1, wherein the first light section includes at least three output sections each outputting one primary color laser light, and the second light section includes an output section outputting laser light.
5. The laser light source according to any one of claims 2 to 4, wherein the first light section further includes an optical component provided corresponding to the output section for collimating the laser light output from the output section, and the second light section further includes an optical component provided corresponding to the output section for collimating the laser light output from the output section.
6. A laser light source as claimed in any one of claims 2 to 4, wherein the output is an optical fibre or a laser.
7. The laser light source according to claim 1, wherein the wavelength conversion portion includes:
a wavelength conversion element which generates at least one primary color light after being irradiated with the laser light emitted from the second light portion;
and an optical component for collimating the light generated by the wavelength conversion element and guiding the light to enter the light combining part.
8. The laser light source according to claim 1, wherein the light output from the first light unit and the light emitted from the wavelength conversion unit are irradiated to the light combining unit, the light combining unit transmits the light output from the first light unit, and the light combining unit reflects the light emitted from the wavelength conversion unit to combine and output the light generated from the three primary colors of laser light and the light generated from the wavelength conversion unit.
9. The laser light source of claim 8, further comprising a light reflecting element, the first light portion and the second light portion being disposed side by side, light output by the second light portion being incident on the light reflecting element, the light reflecting element reflecting light to the wavelength converting portion.
10. A display device comprising the laser light source according to any one of claims 1 to 9.
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| WO2022029003A1 (en) * | 2020-08-04 | 2022-02-10 | Signify Holding B.V. | Laser based light source with adjustable sparkling using multiple lasers |
| CN114326133A (en) * | 2020-09-29 | 2022-04-12 | 成都极米科技股份有限公司 | Optical system and display device |
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