CN113253555B - Lighting system and method for manufacturing the same - Google Patents
Lighting system and method for manufacturing the same Download PDFInfo
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- CN113253555B CN113253555B CN202010601340.5A CN202010601340A CN113253555B CN 113253555 B CN113253555 B CN 113253555B CN 202010601340 A CN202010601340 A CN 202010601340A CN 113253555 B CN113253555 B CN 113253555B
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- 238000004519 manufacturing process Methods 0.000 title abstract description 7
- 238000000034 method Methods 0.000 title description 4
- 238000005286 illumination Methods 0.000 claims abstract description 79
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- 238000010586 diagram Methods 0.000 description 12
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- MCSXGCZMEPXKIW-UHFFFAOYSA-N 3-hydroxy-4-[(4-methyl-2-nitrophenyl)diazenyl]-N-(3-nitrophenyl)naphthalene-2-carboxamide Chemical compound Cc1ccc(N=Nc2c(O)c(cc3ccccc23)C(=O)Nc2cccc(c2)[N+]([O-])=O)c(c1)[N+]([O-])=O MCSXGCZMEPXKIW-UHFFFAOYSA-N 0.000 description 7
- 239000003086 colorant Substances 0.000 description 6
- 230000000149 penetrating effect Effects 0.000 description 6
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- 238000000926 separation method Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 3
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000005357 flat glass Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005424 photoluminescence Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 230000005374 Kerr effect Effects 0.000 description 1
- 230000005697 Pockels effect Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
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Classifications
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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
-
- 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
- G03B21/2053—Intensity control of illuminating light
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Projection Apparatus (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
An illumination system includes a first light source, a second light source, a third light source, a fourth light source, a first light splitting element, a second light splitting element, and a third light splitting element. The first light splitting element is arranged on the light paths of the first light source and the second light source, the second light splitting element is arranged on the light path of the third light source, and the third light splitting element is arranged on the light paths of the third light source and the fourth light source. The third light source and the fourth light source are red light sources with wavelengths ranging from 600 nanometers to 680 nanometers, and the wavelength peak value difference between the third light source and the fourth light source is between 10 nanometers and 50 nanometers. The invention also provides a manufacturing method of the lighting system.
Description
Technical Field
The present invention relates to an illumination system and a method for manufacturing the same, and more particularly, to an illumination system suitable for a projector and a method for manufacturing the same.
Background
With the development of solid state lighting and projection technology in recent years, projection devices mainly using solid state lighting such as light-emitting diodes (LEDs) and laser diodes (laser diodes) are increasingly popular in the market.
In a typical projector architecture, an illumination system is typically provided to provide illumination light. The illumination light is converted into image light after passing through the light valve, and the image light can be projected on a screen or a wall surface after passing through the projection lens. The brightness of the image light outputted by the projector depends on the brightness of the illumination light provided by the illumination system. In an illumination system of a typical projector, a blue light source may output blue light to excite green phosphors to produce green light. The green light and a red light outputted by a red light source and a blue light outputted by a blue light source together form three primary colors (RGB) of illumination light outputted by the illumination system. In the conventional projector architecture, a blue light source is usually additionally disposed to provide blue light to the green phosphor through other light paths, so as to enhance the intensity of the green light excited by the green phosphor, thereby increasing the brightness of the light output by the illumination system.
Disclosure of Invention
The invention provides an illumination system and a manufacturing method thereof, wherein light rays output by the illumination system have higher brightness and better color gamut, and the component configuration is compact (compact).
The illumination system of the embodiment of the invention comprises a first light source capable of outputting first light, a second light source capable of outputting second light, a third light source capable of outputting third light, a fourth light source capable of outputting fourth light and a fifth light source capable of outputting fifth light. The illumination system further comprises a wavelength conversion element arranged at the downstream of the optical paths of the first light source and the second light source, and the wavelength conversion element can convert the first light ray and the second light ray into a first excitation light ray and a second excitation light ray respectively. The illumination system further includes a first beam splitter, a second beam splitter, and a third beam splitter. The first spectroscope is arranged on the light paths of the first exciting light ray and the second exciting light ray, the second spectroscope is arranged on the light path of the fourth light ray, and the third spectroscope is arranged on the light paths of the fourth light ray and the fifth light ray. The peak wavelength difference between the fourth light spectrum and the fifth light spectrum is between 10 nanometers and 50 nanometers, and the arrangement of the first spectroscope, the second spectroscope and the third spectroscope can lead the first exciting light, the second exciting light, the third light, the fourth light and the fifth light to be guided to the same direction.
The illumination system of the embodiment of the invention comprises a first light-emitting element, a second light-emitting element, a third light-emitting element, a fourth light-emitting element, a wavelength conversion element, a first optical light-splitting element and a second optical light-splitting element. The wavelength conversion element is arranged at the downstream of the optical path of the first light emitting element, the first optical splitting element is arranged at the downstream of the optical path of the first light emitting element and the optical path of the second light emitting element, the second optical splitting element is arranged at the downstream of the optical path of the third light emitting element and the optical path of the fourth light emitting element, so that the light emitted by the third light emitting element can penetrate and the light emitted by the fourth light emitting element can be reflected. The light emitted by the third light-emitting element and the light emitted by the fourth light-emitting element are unpolarized light rays of the same color system.
The manufacturing method of the lighting system comprises the following steps. Providing a first light source for outputting a first light. Providing a second light source for outputting a second light. Providing a third light source for outputting a third light. Providing a fourth light source for outputting a fourth light. Providing a fifth light source for outputting a fifth light. And a wavelength conversion element is arranged at the downstream of the light paths of the first light source and the second light source, and the wavelength conversion element can convert the first light ray and the second light ray into a first exciting light ray and a second exciting light ray respectively. A first spectroscope is arranged on the light paths of the first exciting light ray and the second exciting light ray. And a second beam splitter is arranged on the optical path of the fourth light ray. And arranging a third spectroscope on the light paths of the fourth light and the fifth light, wherein the wavelength peak difference of the spectra of the fourth light and the fifth light is between 10 nanometers and 50 nanometers, and the arrangement of the first spectroscope, the second spectroscope and the third spectroscope can lead the first exciting light, the second exciting light, the third light, the fourth light and the fifth light to be guided to the same direction.
Based on the above, in the related embodiments of the invention, since the wavelength peak of the spectrum output by the illumination system is increased between 630nm and 680 nm, when the illumination system is applied to a projection device, for example, the light output by the projection device has higher brightness and better color gamut. In addition, in the lighting system according to the related embodiment of the invention, since the internal space of the lighting system is properly utilized to enhance the light output of the lighting system by increasing the arrangement of the dark red light source, the configuration of the components of the lighting system is compact and the dead space thereof is reduced.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of a projection apparatus.
Fig. 2 is a schematic diagram of an illumination system according to a first embodiment of the invention.
Fig. 3 is a schematic diagram of an illumination system according to a second embodiment of the invention.
Fig. 4 is a schematic diagram of an illumination system according to a third embodiment of the invention.
Fig. 5 is a schematic diagram of an illumination system according to a fourth embodiment of the invention.
Fig. 6 is a schematic diagram of an illumination system according to a fifth embodiment of the invention.
Fig. 7 is a schematic diagram of an illumination system according to a sixth embodiment of the invention.
Fig. 8 is a schematic diagram of an illumination system according to a seventh embodiment of the invention.
FIG. 9 is a spectrum diagram of the first light, the second light, the third light, the fourth light and the fifth light according to the embodiments.
FIG. 10 is a diagram showing the spectra of the second light guide, the third light guide, the fourth light and the fifth light according to the embodiment of FIG. 5.
Detailed Description
The optical element of the present invention is composed of a material that is partially or completely reflective or transmissive, and typically comprises glass or plastic. The lens according to the present invention is an optical element, such as a flat glass, that is, a non-lens, which allows at least part of light to pass through, and at least one of the light incident surface and the light emergent surface is non-planar. The light combining means that more than one light beam can be combined into one light beam for output. The present invention relates to a beam splitting system, which can split one light beam into a plurality of light beams for output.
Fig. 1 is a schematic diagram of a projection apparatus, and the projection apparatus 100 includes an illumination system 110, a light valve 120, a projection lens 130, and an optical path adjusting mechanism 140. The illumination system 110 has a light source 112 adapted to provide an illumination beam 114, and a light valve 120 is disposed on a transmission path of the beam 114. The light valve 120 is adapted to convert the light beam 114 into an image light beam 114a. In addition, the projection lens 130 is disposed on the transmission path of the image beam 114a, and the light valve 120 is located between the illumination system 110 and the projection lens 130. In addition, the optical path adjusting mechanism 140 may be disposed between the light valve 120 and the projection lens 130, for example, between the light valve 120 and the total internal reflection prism 119 or between the total internal reflection prism 119 and the projection lens 130, and is located on the transmission path of the image beam 114a. In the projection apparatus 100, the light source 112 may include, for example, a red light emitting diode 112R, a green light emitting diode 112G, and a blue light emitting diode 112B, and the color light emitted by each light emitting diode is combined by a light combining device 116 to form an illumination beam 114, and the illumination beam 114 sequentially passes through a light homogenizing element 117, such as a lens array (lens array) or a light collecting column (light integration rod), a lens set 118, and a total internal reflection Prism (TIR Prism) 119. The TIR prism 119 then reflects the light beam 114 to the light valve 120. At this time, the light valve 120 converts the light beam 114 into the image light beams 114a, and the image light beams 114a sequentially pass through the total internal reflection prism 119 and the light path adjusting mechanism 140, and project the image light beams 114a onto the screen 150 through the projection lens 130.
Fig. 2 illustrates an illumination system 110a according to a first embodiment of the present invention. In the present embodiment, the first light source S1 can output the first light L1, the second light source S2 can output the second light L2, the third light source S3 can output the third light L3, the fourth light source S4 can output the fourth light L4, and the fifth light source S5 can output the fifth light L5. The first, second, third, fourth and fifth light sources S1, S2, S3, S4 and S5 each include, for example, a Laser Diode (LD) chip, a light-emitting diode (LED) chip or any of the packages of the foregoing, which can emit various kinds of visible light. In the present embodiment, the first light source S1, the second light source S2 and the third light source S3 include a blue light emitting diode chip, and the colors of the first light beam L1, the second light beam L2 and the third light beam L3 are substantially blue. The fourth light source S4 includes a red light (red) led chip, the fifth light source S5 includes a deep red light (deep red) led chip, and the fourth light L4 is substantially red, and the fifth light L5 is substantially deep red. The peak difference of the wavelength of the fourth light and the fifth light is between 10 nanometers and 50 nanometers, and the colors of the fourth light and the fifth light belong to the red color system in a broad sense.
In addition, the wavelength conversion element P1 is located downstream of the first light source S1 and the second light source S2, and P1 means at least one optical element containing fluorescent powder. More specifically, the wavelength conversion element P1 is a transparent colloid, a fluorescent wheel, a fluorescent sheet or other optical elements including fluorescent powder and having wavelength conversion function, such as a Laser Diode (LD) chip, a light-emitting diode (LED) chip or any of the packages of the above, which have fluorescent powder and can emit various visible light. In the present embodiment, the wavelength conversion element P1 is disposed on the optical path downstream of the first light source S1 and the second light source S2, that is, the wavelength conversion element P1 is disposed on the transmission path of the first light ray L1 and the second light ray L2. The wavelength conversion element P1 can receive light and convert the light to generate excitation light by a Photoluminescence (photo luminescence) phenomenon. Specifically, the wavelength conversion element P1 may receive, for example, blue light of the first light ray L1 and generate green light of the first excitation light ray (Pump light) PL1, or blue light of the second light ray L2 and generate green light of the second excitation light ray PL2. The first excitation light PL1 and the second excitation light PL2 have a spectrum, the wavelength peaks of the spectra are between 490 nm and 590nm, and the wavelength peak difference of the spectra is less than 10 nm. More specifically, the first excitation light PL1 and the second excitation light PL2 have a corresponding spectral energy distribution curve in a spectral energy distribution spectrum, and the peak of the distribution curve falls in a green wavelength range (for example, between 490 nm and 590 nm).
The first light guide G1a, the second light guide G2a, and the third light guide G3a of the present invention are light-splitting sheets, polarizing sheets, optical filters, X-plates, mirrors, lenses, plate glasses, prisms, integrating columns, light-guiding rods, or a combination comprising at least one of the foregoing. In detail, the spectroscopic plate refers to an optical element having a spectroscopic function such as a half-reflecting half-lens, a polarizing plate for spectroscopic of P, S polarity, various wave plates, various prisms for spectroscopic of incident angle, a spectroscopic plate for spectroscopic of wavelength, and the like. Specifically, in the present embodiment, the first light guide G1a, the second light guide G2a, and the third light guide G3a have wavelength selectivity, and are color separation sheets for performing light separation by wavelength (color), for example, dichroic Mirror (DM). In the related embodiment, the first light guide member G1a, the second light guide member G2a and the third light guide member G3a may be an optical element with a color separation function, or may be a color separation film or a coating plated on other components, which is not limited in the present invention. In the present embodiment, the first light guide G1a can reflect the blue light rays L1 and L3 and transmit the green light rays PL1 and PL2, the second light guide G2a can reflect the red light ray L4 and transmit the other color light rays, and the third light guide G3a can reflect the dark red light ray L5 and transmit the other color light rays. In the present embodiment, the third light ray L3, the fourth light ray L4, the fifth light ray L5, the first excitation light ray PL1 and the second excitation light ray PL2 are respectively outputted through the second light guide member G2a and the third light guide member G3a to form the illumination light ray 114.
In detail, the illumination system 110a may further include a light uniformity element 117 disposed on the transmission path of the illumination light to homogenize the intensity distribution of the illumination light. Specifically, the light uniformity element 117 may be an optical element such as a Fly-eye lens (Fly-eye lens) or a light integration column or a light collection column (light integration rod), which is not limited to this embodiment. In another embodiment, the light homogenizing element 117 may not be included. In addition, the illumination system 110a may further include other optical elements, such as lenses, diffusers, reflectors or prisms, according to practical needs, and the invention is not limited thereto.
The light valve 120 of the present invention contains a number of individual cells that are spatially arranged in a one-dimensional or two-dimensional array. Each unit can be independently controlled by an optical signal or an electrical signal, and the optical characteristics of the unit can be changed by various physical effects (a Pockels effect, a Kerr effect, an acousto-optic effect, a magneto-optic effect, a semiconductor self-electro-optic effect, a photorefractive effect and the like), so that illumination light illuminating the plurality of independent units is modulated, and image light is output. The independent units are optical elements such as micro-mirrors, liquid crystal units and the like. In detail, the light valve 120 of the present invention is a digital micro-mirror device (DMD), a liquid-crystal-on-silicon panel (LCOS panel), or a transmissive liquid crystal panel. In this embodiment, the light valve is a digital micromirror device, however, in other embodiments, the light valve 120 may be a transmissive liquid crystal panel or other spatial light modulator, which is not limited to the present invention.
In addition, the projection lens 130 is composed of at least one lens. An aperture stop or optical path may be disposed in the projection lens 130, and at least one lens is disposed in front of and behind the aperture stop to adjust the shape and aberration of the image light.
The arrangement of the elements and the transmission of light of the illumination system 110a of the first embodiment of fig. 2 are exemplarily described below. In the present embodiment, the first light source S1 outputs the first light L1 of blue color, reflects the first light L1 via the first light guide G1a to reach the wavelength conversion element P1, and excites the first excitation light PL1 converted into green color. The second light source S2 outputs a blue second light L2, and the blue second light L2 reaches the wavelength conversion element P1 and excites the second excitation light PL2 converted into green. The first light guide G1a is inclined with respect to the first light source S1, such that the incident angle of the first light L1 to the first light guide G1a is, for example, about 45 degrees. Specifically, when the green first excitation light PL1 and the green second excitation light PL2 leave the wavelength conversion element P1 by reflection and/or transmission, the green first excitation light PL1 and the green second excitation light PL2 penetrate the first light guide G1a, reach the second light guide G2a and the third light guide G3a, and penetrate the second light guide G2a substantially parallel to the first light guide G1a, and the third light guide G3a substantially perpendicular to the second light guide G2 a. In addition, the third light source S3 outputs a third light L3 of blue color, and the third light L3 is reflected by the first light guide G1a to reach the second light guide G2a and the third light guide G3a and is transmitted. The fourth light source S4 outputs a red fourth light L4, and the fourth light L4 is reflected by the second light guide member G2a to reach the third light guide member G3a and penetrate, the fifth light source S5 outputs a dark red fifth light L5, and the fifth light L5 is reflected by the third light guide member G3a to reach the second light guide member G2a and penetrate.
In the present embodiment, the first excitation light ray PL1, the second excitation light ray PL2, the third light ray L3, and the fifth light ray L5 penetrating the second light guide member G2a and the fourth light ray L4 penetrating the third light guide member G3a described above are combined into the illumination light ray 114 and output from the illumination system 110. In detail, the color of the third light ray L3 is, for example, blue, the color of the fourth light ray L4 and the color of the fifth light ray L5 are, for example, red and deep red, and the color of the first excitation light ray PL1 and the color of the second excitation light ray PL2 are, for example, green. Therefore, the first, second, third, fourth and fifth light rays PL1, PL2, L3, L4 and L5 may provide three primary colors (RGB) of illumination light. In the present embodiment, the illumination light 114 is transmitted to the light valve 120, and the light valve 120 is used to convert the illumination light 114 into the image light 114a. In addition, the projection lens 130 is used for projecting the image beam 114a onto an imaging plane or screen 150 to form an image frame.
Please refer to fig. 9, which is a spectrum diagram of each of the above-mentioned emitted light. The blue light (L1, L2, L3) refers to the spectrum of light having a peak wavelength between 400 nm and 460 nm. The green excitation light rays (PL 1, PL 2) are those having a spectrum with a peak wavelength of 490 nm to 590 nm. The red light (L4) refers to a spectrum having a peak wavelength of 600 nm to 630 nm. The dark red light (L5) refers to the spectrum of light with a peak wavelength between 630nm and 680 nm. Therefore, the light (dark red light) having a peak wavelength of the spectrum output by the illumination system 110 between 630nm and 680 nm increases, so that the light output by the projection device 100 has higher brightness and better color gamut. Wherein the brightness can be increased by about 12-17%, and the color gamut can be increased by about 4%.
It should be noted that, in this embodiment, the blue light emitted by the first light source and the second light source is used to excite the wavelength conversion element, and then converted into the green first excitation light and the green second excitation light. However, only blue light from one light source may be used to excite the wavelength conversion element, and in this case, the illumination system may output three primary colors (RGB) of illumination light using only four light sources. In another embodiment, the blue light emitted by the first light source and the second light source may be used to excite the wavelength conversion element, and the first excitation light and the second excitation light converted into red may be used, where the color of the fourth light L4 is substantially green, and the color of the fifth light L5 is substantially dark green. The peak difference of the wavelength of the fourth light and the fifth light is between 10 nanometers and 50 nanometers, and the colors of the fourth light and the fifth light belong to a green color system in a broad sense. Furthermore, in another embodiment, both the red light and the dark red light are unpolarized light.
Please refer to fig. 3, which illustrates an illumination system 110b according to a second embodiment of the present invention. In this embodiment, the illumination system 110b is similar to the illumination system 100a of the embodiment of fig. 2, with the main differences described below. In the present embodiment, the first and second excitation light rays PL1 and PL2 of green and the third light ray L3 of blue reach the second light guide member G2b via the first light guide member G1b and penetrate. The fourth light L4 of red color passes through the third light guide member G3b to reach the second light guide member G2b and is reflected by the second light guide member G2b, and the fifth light L5 of deep red color passes through the third light guide member G3b to reach the second light guide member G2b and is reflected by the second light guide member G2 b. Thereby, the first excitation light PL1, the second excitation light PL2, the third light L3, and the fourth light L4 and the fifth light L5 transmitted through the second light guide G2b are combined into an illumination light 114 and output from the illumination system 110 b.
Please refer to fig. 4 for a third embodiment of the illumination system 110 c. In this embodiment, the illumination system 110c is similar to the illumination system 100a of the embodiment of fig. 2, with the main differences described below. In the present embodiment, the first and second excitation light rays PL1 and PL2 of green and the third light ray L3 of blue penetrate the second and third light guides G2c and G3c via the first light guide G1 c. The fourth light L4 of red color is reflected by the second light guide member G2c to reach the third light guide member G3c, and penetrates the third light guide member G3c, and the fifth light L5 of deep red color is reflected by the third light guide member G3c. Thereby, the first excitation light PL1, the second excitation light PL2, the third light L3, the fourth light L4, and the fifth light L5 transmitted through the third light guide G3c are combined into the illumination light 114 and output from the illumination system 110 c.
Please refer to fig. 5, which illustrates a lighting system 110d according to a fourth embodiment of the present invention. In this embodiment, the illumination system 110d is similar to the illumination system 100a of the embodiment of fig. 2, with the main differences described below. In the present embodiment, the first excitation light PL1 and the second excitation light PL2 of green and the third light L3 of blue sequentially pass through the second light guide G2d, the first lens array 117a and are reflected by the third light guide G3d via the first light guide G1 d. The fourth light L4 with red color is reflected by the second light guide G2d, then passes through the first lens array 117a and is reflected by the third light guide G3d, and the fifth light L5 with dark red color passes through the second lens array 117b and the third light guide G3d. Thereby, the fifth light ray L5 penetrating the third light guide G3d and the first, second, third and fourth excitation light rays PL1, PL2, L3 and L4 reflected by the third light guide G3d are combined into an illumination light ray 114 and output from the illumination system 110 d.
In addition, please refer to fig. 10 for further explanation of the second light guide G2d, the third light guide G3d, the fourth light ray L4 and the fifth light ray L5 of the present embodiment. The second light guide member G2d is a light-splitting sheet for splitting light by wavelength, which can highly transmit the visible light with the wavelength below about 570nm, but can block the visible light with the wavelength above about 590 nm. The third light guide member G3d is also a light splitting sheet that splits light by wavelength, but blocks visible light having a wavelength below about 620nm, but is highly transparent to visible light having a wavelength above about 630 nm. Therefore, by utilizing the characteristics of the second light guide G2d and the third light guide G3d, the fourth light L4 of red color may be blocked by the second light guide G2d and the third light guide G3d and reflected, but the fifth light L5 of deep red color penetrates the third light guide G3d. In any of the light guide members according to the embodiments of the present invention, a person having ordinary skill in the art can change the coating design to achieve the function of penetrating or blocking any of the above light rays.
Please refer to fig. 6, which illustrates a lighting system 110e according to a fifth embodiment of the present invention. In this embodiment, the illumination system 110e is similar to the illumination system 100a of the embodiment of fig. 2, with the main differences described below. In the present embodiment, the first excitation light PL1 and the second excitation light PL2 of green reach the second light guide G2e via the first light guide G1e and penetrate. The blue third light ray L3 is reflected by the second light guide G2 e. The fourth light L4 of red color passes through the third light guide G3e to reach the first light guide G1e, and is reflected by the first light guide G1e to reach the second light guide G2e and pass through. The fifth light L5 of dark red color is reflected by the third light guide G3e to reach the first light guide G1e, reflected by the first light guide G1e, reaches the second light guide G2e and penetrates. Thereby, the first excitation light PL1, the second excitation light PL2, the fourth light L4, the fifth light L5, and the third light L3 reflected by the second light guide G2e penetrating the second light guide G2e are combined into the illumination light 114 and output from the illumination system 110 e.
Please refer to fig. 7, which illustrates a lighting system 110f according to a sixth embodiment of the present invention. In the present embodiment, the first light source S1 outputs the first light L1 of blue color, penetrates the first light guide G1f to reach the wavelength conversion element P1, and excites the first excitation light PL1 converted into green color. The second light source S2 outputs a blue second light L2, and the blue second light L2 reaches the wavelength conversion element P1 and excites the second excitation light PL2 converted into green. The first light guide G1f is inclined with respect to the first light source S1, such that an incident angle of the first light L1 to the first light guide G1f is, for example, about 45 degrees. Specifically, when the first excitation light PL1 and the second excitation light PL2 of green color leave the wavelength conversion element P1 by reflection and/or transmission, they are reflected by the first light guide G1f. The blue third light L3 is reflected by the second light guide G2f and penetrates the third light guide G3f and the first light guide G1f. The fourth light L4 of red color penetrates the second light guide G2f, the third light guide G3f, and the first light guide G1f. The fifth light L5 of dark red is reflected by the third light guide G3f and penetrates the second light guide G2f and the first light guide G1f. Thereby, the third, fourth and fifth light rays L3, L4 and L5 penetrating the first light guide G1f and the first and second excitation light rays PL1 and PL2 reflected by the first light guide G1f are combined into an illumination light ray 114 and output from the illumination system 110 f.
Please refer to fig. 8, which illustrates a lighting system 110g according to a seventh embodiment of the present invention. In this embodiment, the illumination system 110g is similar to the illumination system 100a of the embodiment of fig. 2, with the main differences described below. In the present embodiment, the first excitation light PL1 and the second excitation light PL2 of green color penetrate the first light guide G1G. The blue third light L3 passes through the second light guide G2G and the third light guide G3G and is reflected by the first light guide G1G. The fourth light L4 of red color is reflected by the second light guide G2G and penetrates the third light guide G3G to reach the first light guide G1G and is reflected by the first light guide G1G. The fifth light L5 of dark red is reflected by the third light guide G3G and penetrates the second light guide G2G, reaches the first light guide G1G, and is reflected by the first light guide G1G. Thereby, the first excitation light PL1, the second excitation light PL2, and the third light L3, the fourth light L4, and the fifth light L5, which have penetrated the first light guide G1G, are combined into an illumination light 114 and output from the illumination system 110G.
The light-emitting element of the present invention is an optical element capable of generating light. More specifically, the light emitting device is a light emitting diode chip, a laser diode chip, a module packaged by the above chips, or other devices or combinations thereof capable of achieving the same effect.
In summary, in the related embodiment of the invention, since the wavelength peak of the spectrum output by the illumination system 110 is increased between 630nm and 680 nm, when the illumination system is applied to a projection apparatus, for example, the light output by the projection apparatus has higher brightness and better color gamut. In addition, in the lighting system according to the related embodiment of the invention, since the internal space of the lighting system is properly utilized to enhance the light output of the lighting system by increasing the arrangement of the dark red light source, the configuration of the components of the lighting system is compact and the dead space thereof is reduced.
While the invention has been described with respect to preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention, and that any such changes and modifications as described in the above embodiments are intended to be within the scope of the invention.
Claims (8)
1. A lighting system, comprising:
a first light source for emitting a first blue light;
a second light source for emitting a second blue light;
a third light source;
a fourth light source;
a fifth light source for emitting a third blue light;
the first light splitting element is arranged on the light paths of the first light source and the second light source;
the second light splitting element is arranged on the light path of the third light source; the third light splitting element is arranged on the light paths of the third light source and the fourth light source; and
the optical element is provided with fluorescent powder and is arranged between the first light source and the light path of the first light splitting element, and the optical element can be excited to emit green light;
wherein the first blue light may be reflected to the optical element by the first light splitting element and the second blue light may illuminate the optical element to excite the optical element to generate the green light; and
the third light source and the fourth light source are red light sources with wavelengths ranging from 600 nanometers to 680 nanometers, and the wavelength peak value difference of the third light source and the fourth light source is between 10 nanometers and 50 nanometers.
2. The illumination system of claim 1, wherein the second light-splitting element and the third light-splitting element are configured in an X-shape.
3. The lighting system of claim 1, wherein the lighting system satisfies one of the following conditions: (1) The light source device further comprises a first lens array and a second lens array, wherein the first lens array is positioned between the second light splitting element and the third light splitting element, and the second lens array is positioned between the fourth light source and the third light splitting element, (2) the lens array is not included.
4. The illumination system of claim 1, wherein the third light source has a wavelength peak between 600 nm and 630nm and the fourth light source has a wavelength peak between 630nm and 680 nm.
5. A lighting system, comprising:
a first light-emitting element for emitting a first blue light;
a second light emitting element for emitting a second blue light;
a third light emitting element;
a fourth light emitting element;
a fifth light-emitting element for emitting a third blue light;
the first optical light splitting element is arranged at the downstream of the light paths of the first light emitting element and the second light emitting element;
the second optical light splitting element is arranged at the downstream of the light paths of the third light emitting element and the fourth light emitting element, and can enable the unpolarized light rays emitted by the third light emitting element to penetrate and reflect the unpolarized light rays emitted by the fourth light emitting element; and
an optical element provided with a fluorescent powder layer and arranged between the first light-emitting element and the light path of the first optical light-splitting element, wherein the optical element can be excited to emit green light;
wherein the first blue light may be reflected to the optical element by the first optical splitting element and the second blue light may illuminate the optical element to excite the optical element to generate the green light; and
the wavelength peak value of the unpolarized light emitted by the third light emitting element is between 630 nanometers and 680 nanometers, and the wavelength peak value of the unpolarized light emitted by the fourth light emitting element is between 600 nanometers and 630 nanometers.
6. The illumination system of claim 5, wherein the unpolarized light emitted by the third light-emitting element and the unpolarized light emitted by the fourth light-emitting element have a peak difference in spectrum between 10 nm and 50 nm.
7. The lighting system of claim 5, wherein the lighting system satisfies one of the following conditions: (1) The light-emitting device further comprises a first lens array and a second lens array, wherein the first lens array is positioned between the first optical splitting element and the second optical splitting element, and the second lens array is positioned between the third light-emitting element and the second optical splitting element, (2) the lens array is not included.
8. The illumination system of any one of claims 1 to 7, applied to a projector.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW109104246A TWI809249B (en) | 2020-02-11 | 2020-02-11 | Illumination system and fabrication method thereof and projector |
| TW109104246 | 2020-02-11 |
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| CN113253555A CN113253555A (en) | 2021-08-13 |
| CN113253555B true CN113253555B (en) | 2024-01-05 |
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| CN202021216225.8U Active CN213423689U (en) | 2020-02-11 | 2020-06-28 | Lighting system |
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| TWI809249B (en) * | 2020-02-11 | 2023-07-21 | 揚明光學股份有限公司 | Illumination system and fabrication method thereof and projector |
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| TWI605295B (en) * | 2015-12-02 | 2017-11-11 | 中強光電股份有限公司 | Projector and wavelength conversion device |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN213423689U (en) | 2021-06-11 |
| TW202131056A (en) | 2021-08-16 |
| TWI809249B (en) | 2023-07-21 |
| CN113253555A (en) | 2021-08-13 |
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