CN110618576A - Highly integrated high-power, wide color gamut and low-speckle laser light source system - Google Patents
Highly integrated high-power, wide color gamut and low-speckle laser light source system Download PDFInfo
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- CN110618576A CN110618576A CN201910899916.8A CN201910899916A CN110618576A CN 110618576 A CN110618576 A CN 110618576A CN 201910899916 A CN201910899916 A CN 201910899916A CN 110618576 A CN110618576 A CN 110618576A
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- laser light
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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
- G02B27/10—Beam splitting or combining systems
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
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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
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a highly integrated high-power wide-color-gamut and low-speckle laser light source system, which comprises a blue light laser light source I (1), a blue light laser light source II (6), a green light laser light source (7) and a red light laser light source (8); the light beam emitted by the blue light laser source I (1) sequentially passes through the light homogenizing plate I (2), the yellow-reflecting and blue-transmitting beam combining mirror I (3) and the lens group I (4) to be incident to the fluorescent material (5); and the light beam emitted by the blue light laser light source II (6) sequentially passes through the light homogenizing sheet II (6), the reflecting mirror (11), the yellow-reflecting blue-transmitting beam combining mirror II (12), the red-reflecting blue-green-transmitting beam combining mirror (13) and the lens group II (14) to be incident to the light through pipe (15). The invention realizes the laser light source with large color gamut and laser close-packed integration, simultaneously reduces the coherence of the light source through the selection of multiple wavelengths, can effectively inhibit laser speckles, and has good market application prospect.
Description
Technical Field
The invention relates to the technical field of laser projection, in particular to a highly integrated high-power wide-color-gamut and low-speckle laser light source system applied to a laser fluorescent projection system.
Background
Projectors have been widely used in various industries such as education, business, engineering, monitoring, simulation training, and cinema exhibition since birth, as one of the most important devices in the display industry. However, in the current global market range, bulbs of xenon lamps, high-pressure mercury lamps and the like widely used in projectors have short service life, poor color, limited brightness, high use cost, environmental pollution and the like, and cannot meet the requirements of continuous work of 24 hours/day and 7 days per week, such as new industrial application requirements of control and monitoring rooms, large buildings lighting and real scenes and the like. The red, green and blue (RGB) laser projection display technology makes full use of the characteristics of laser wavelength selectivity and high spectral brightness, so that a display image has a larger color gamut expression space, can reproduce rich and gorgeous colors of an objective world most truly, provides more shocking expression and is praised as a final display technology in the display industry.
The projection display takes definition and color gamut range as the measurement standards of picture quality, the definition is upgraded from 1080P to 4k, the color gamut is expanded from Rec.709 to DCI-P3, and is further upgraded to Rec.2020 color gamut, which is a new requirement of the industry for the display picture to have extremely perfect color performance.
The green semiconductor laser currently available on the market has only two wavelengths, 520nm and 525nm, and neither of these wavelengths can cover the color gamut rec.2020, as shown in fig. 2. To cover the color gamut Rec.2020, 532nm laser must be used, and currently, only solid-state laser can generate 532nm green light, and such laser has large volume, high price and cost, poor stability, and is difficult to be commercially applied in the projection industry.
Disclosure of Invention
The semiconductor RGB laser diode integrated light source in the current market cannot cover the color gamut Rec.2020, and meanwhile, due to the existence of laser speckles, the gray scale of an image is changed violently, so that the display quality of the image is reduced. Aiming at the technical problem, the invention aims to provide a highly-integrated high-power, wide-color-gamut and low-speckle laser light source system which can effectively solve the technical problems that a semiconductor RGB laser diode integrated light source does not meet the color gamut Rec.2020 and the speckles are serious.
The invention is realized by adopting the following technical scheme:
a highly integrated high-power, wide color gamut and low-speckle laser light source system comprises a blue light laser light source I, a blue light laser light source II, a green light laser light source and a red light laser light source.
And the light beam emitted by the blue light laser source I sequentially passes through the light homogenizing sheet I, the yellow-reflecting and blue-transmitting beam combining mirror I and the lens group I to be incident to the fluorescent material.
And the light beam emitted by the blue light laser source II sequentially passes through the light homogenizing sheet II, the reflector, the yellow-reflecting and blue-transmitting beam combining mirror II, the red-reflecting and blue-green-transmitting beam combining mirror and the lens group II and is incident to the light through pipe.
And light beams emitted by the green laser source sequentially pass through the yellow-reflecting and blue-transmitting beam combiner II, the red-reflecting and blue-green-transmitting beam combiner and the lens group II to be incident to the light through pipe.
And light beams emitted by the red light laser light source are incident to the light through tube sequentially through the light homogenizing sheet III, the red-reflecting and blue-green beam combining lens and the lens group II.
The light beam emitted by the fluorescent material is incident to the light through tube through the lens group I, the anti-yellow and anti-blue beam combining mirror II, the anti-red and anti-blue-green beam combining mirror and the lens group II in sequence.
The invention designs the highly integrated high-power, wide color gamut and low-speckle laser source system for enabling the semiconductor laser diode integrated light source to meet the Rec.2020 requirement, simultaneously has small volume and high power output, utilizes the blue laser source with lower cost to excite the fluorescent material to generate the colored light with the color of more than 532nm, adopts the special beam combining mirror to couple the semiconductor RGB laser diode into the light through pipe in the mode of wavelength beam combination, can realize the requirement of the large color gamut of Rec.2020 (the wide color gamut is realized by the combined beam of the light with the wavelength of more than 532nm and the RGB), simultaneously, the multi-wavelength semiconductor laser diodes are arranged in a high-density stacking way, can obtain the high-power laser source (highly integrated high power), and meets the requirement of a high-brightness projector. When the multi-wavelength beam combination is carried out, speckles can be remarkably reduced (the coherence of a light source is reduced), and the film viewing experience is improved.
The invention combines two beam combining mirrors (a reverse yellow and blue light combining mirror and a reverse red and blue light combining mirror) to have light transmission characteristics, designs a novel optical light path using the two beam combining mirrors, couples and integrates a semiconductor RGB laser diode and a laser fluorescence unit, realizes a laser source with large color gamut and dense packing integration of lasers, simultaneously reduces the coherence of the light source by selecting multiple wavelengths, can effectively inhibit laser speckles, and has good market application prospect.
Drawings
Fig. 1 shows a schematic of the system of the present invention.
Fig. 2 shows a color gamut diagram, iii-large color gamut laser light source, which is satisfied by the system of the present invention.
Fig. 3 shows the optical characteristics of the anti-yellow and transflective beam combiner.
Fig. 4 shows the optical characteristics of the anti-red, transflective blue-green combiner.
In the figure: the light source comprises a 1-blue light laser light source I, a 2-dodging sheet I, a 3-anti-yellow and blue-transparent beam combining mirror I, a 4-lens group I, a 5-fluorescent material, a 6-blue light laser light source II, a 7-green light laser light source, an 8-red light laser light source, a 9-dodging sheet II, a 10-dodging sheet III, an 11-reflector, a 12-anti-yellow and blue-transparent beam combining mirror II, a 13-anti-red and blue-green light combining mirror, a 14-lens group II and a 15-light through pipe.
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings.
The laser light source integrated by the semiconductor RGB laser diode cannot cover the color gamut Rec.2020, and the color gamut of the laser light source can meet the requirement of the large color gamut Rec.2020 by implementing the light source system of the embodiment, so that the high-power laser light source with high integration level, wide color gamut and low speckle can be produced.
As shown in fig. 1, a highly integrated high-power, wide-color-gamut and low-speckle laser light source system includes a blue laser light source i 1, a blue laser light source ii 6, a green laser light source 7 and a red laser light source 8.
Light beams emitted by the blue light laser source I1 sequentially pass through the light homogenizing sheet I2, the yellow-reflecting and blue-transmitting beam combining mirror I3 and the lens group I4 to be incident to the fluorescent material 5.
The light beam emitted by the blue light laser source II 6 sequentially passes through the light homogenizing sheet II 6, the reflector 11, the yellow-reflecting blue-transmitting beam combining mirror II 12, the red-reflecting blue-green-transmitting beam combining mirror 13 and the lens group II 14 to be incident to the light through pipe 15.
The light beam emitted by the green laser light source 7 sequentially passes through the yellow-reflecting blue-transmitting beam combining mirror II 12, the red-reflecting blue-green transmitting beam combining mirror 13 and the lens group II 14 to be incident to the light through pipe 15.
The light beam emitted by the red light laser light source 8 sequentially passes through the light homogenizing sheet III 10, the red-reflecting and blue-green beam combining mirror 13 and the lens group II 14 and enters the light through pipe 15.
The light beam emitted by the fluorescent material 5 sequentially passes through the lens group I4, the anti-yellow and anti-blue beam combining mirror I3, the anti-yellow and anti-blue beam combining mirror II 12, the anti-red and anti-blue and green beam combining mirror 13 and the lens group II 14 to be incident to the light through pipe 15.
The specific process is that light emitted by a blue light laser source I1 passes through a light homogenizing lens I2, is transmitted through a yellow-reflecting blue-transmitting beam combining mirror I3, is focused to a fluorescent material 5 by a lens group I4, the blue light source focused to the fluorescent material excites the fluorescent material to generate colored light of more than 532nm, is parallelly emitted to a yellow-reflecting blue-transmitting beam combining mirror I3 through the lens group I4, is reflected to a yellow-reflecting blue-transmitting beam combining mirror II 12, the yellow-reflecting blue-transmitting beam combining mirror 12 has a light transmission characteristic shown in figure 3, under 45-degree incidence, light transmission of 470nm of 440 ~ is more than 95%, light reflection of 490 36675 nm is more than 98%, another blue light laser source II 6 passes through a light homogenizing lens II 9 and then is incident to a reflecting mirror 11, is reflected to a yellow-reflecting blue-transmitting beam combining mirror II 12, a green light laser source 7 passes through the yellow-reflecting blue-light beam combining mirror II 12, is coupled with a fluorescence excitation light source generated by the blue light and fluorescent material 5, enters a traveling wave combining beam generating light source 8, passes through a red light source 6310, passes through a red light beam combining mirror 6313, passes through a blue-green light transmitting beam combining mirror II 13, a blue-green light source III and a blue-green light reflection mirror 13, a blue-green light reflection light source.
In specific implementation, the wavelengths of the blue light emitted by the blue light laser source I1 and the blue light laser source II 6 are 448nm, 455nm or 465 nm; the wavelength of green light emitted by the green laser light source 7 is 520nm or 525 nm; the wavelength of green light emitted by the red laser light source 8 is 638nm, 639nm or 642 nm. The system adopts the multi-wavelength laser light source and the fluorescent exciting light multi-wavelength color light beam generated by the fluorescent material, so that the coherence of the light source can be effectively reduced, and the purpose of dispersing the spots is achieved. By adopting the novel optical path shown in fig. 1 and adopting the beam combiner to combine the light beams of the multi-wavelength light source, the requirement of large color gamut Rec.2020 can be met, and thus the high-power laser light source with high brightness, high cost performance, low speckle and stable performance is realized.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (4)
1. A highly integrated high-power, wide color gamut and low speckle laser light source system is characterized in that: comprises a blue laser light source I (1), a blue laser light source II (6), a green laser light source (7) and a red laser light source (8);
the light beam emitted by the blue light laser source I (1) sequentially passes through the light homogenizing plate I (2), the yellow-reflecting and blue-transmitting beam combining mirror I (3) and the lens group I (4) to be incident to the fluorescent material (5);
the light beam emitted by the blue light laser source II (6) sequentially passes through the light homogenizing sheet II (6), the reflector (11), the yellow-reflecting blue-transmitting beam combining mirror II (12), the red-reflecting blue-green-transmitting beam combining mirror (13) and the lens group II (14) to be incident to the light through pipe (15);
the light beam emitted by the green light laser source (7) sequentially passes through the yellow-reflecting and blue-transmitting beam combiner II (12), the red-reflecting and blue-green-transmitting beam combiner (13) and the lens group II (14) to be incident to the light through pipe (15);
the light beam emitted by the red light laser light source (8) sequentially passes through the light homogenizing sheet III (10), the red-reflecting and blue-green beam combining mirror (13) and the lens group II (14) to be incident to the light through pipe (15);
the light beam emitted by the fluorescent material (5) is incident to the light through pipe (15) through the lens group I (4), the anti-yellow and anti-blue beam combining mirror I (3), the anti-yellow and anti-blue beam combining mirror II (12), the anti-red and anti-blue-green beam combining mirror (13) and the lens group II (14) in sequence.
2. The highly integrated high power, wide color gamut, and low speckle laser light source system of claim 1, wherein: the light beams transmitted or reflected by the beam combiner are incident at an angle of 45 degrees.
3. The highly integrated high power, wide color gamut, and low speckle laser light source system according to claim 1 or 2, wherein: the blue light wavelength emitted by the blue light laser light source I (1) and the blue light laser light source II (6) is 448nm, 455nm or 465 nm; the wavelength of green light emitted by the green laser light source (7) is 520nm or 525 nm; the wavelength of green light emitted by the red light laser light source (8) is 638nm, 639nm or 642 nm.
4. The highly integrated high-power, wide-color-gamut and low-speckle laser light source system as claimed in claim 1, wherein the light transmission characteristics of the anti-yellow and blue-transmitting beam combiner (12) are that the light transmission at 440 ~ 470nm is more than 95% and the light reflection at 490 ~ 675nm is more than 98% under 45 degree incidence, and the light transmission characteristics of the anti-red and blue-green beam combiner (13) are that the light transmission at 420 ~ 620nm is more than 95% and the light reflection at 630 ~ 675nm is more than 98% under 45 degree incidence.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910899916.8A CN110618576A (en) | 2019-09-23 | 2019-09-23 | Highly integrated high-power, wide color gamut and low-speckle laser light source system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910899916.8A CN110618576A (en) | 2019-09-23 | 2019-09-23 | Highly integrated high-power, wide color gamut and low-speckle laser light source system |
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| CN110618576A true CN110618576A (en) | 2019-12-27 |
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| CN201910899916.8A Pending CN110618576A (en) | 2019-09-23 | 2019-09-23 | Highly integrated high-power, wide color gamut and low-speckle laser light source system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113805419A (en) * | 2020-06-15 | 2021-12-17 | 中强光电股份有限公司 | Illumination system and projection device |
| US20220229353A1 (en) * | 2019-10-11 | 2022-07-21 | Jinmei Lasertec Corp., Ltd | Large color gamut laser light source system integrated by notch combining beam |
-
2019
- 2019-09-23 CN CN201910899916.8A patent/CN110618576A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220229353A1 (en) * | 2019-10-11 | 2022-07-21 | Jinmei Lasertec Corp., Ltd | Large color gamut laser light source system integrated by notch combining beam |
| CN113805419A (en) * | 2020-06-15 | 2021-12-17 | 中强光电股份有限公司 | Illumination system and projection device |
| CN113805419B (en) * | 2020-06-15 | 2024-02-09 | 中强光电股份有限公司 | Illumination system and projection device |
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Effective date of registration: 20220128 Address after: 030006 workshop No.3, No.51 Zhengyang Street, Taiyuan City, Shanxi Province Applicant after: Shanxi Hanwei laser Polytron Technologies Inc. Address before: 030006 floor 3, No. 2, electronic road, high tech Zone, Taiyuan City, Shanxi Province Applicant before: SHANXI OVO LIGHT VISION PHOTOELECTRIC TECHNOLOGY CO.,LTD. |