TW201839494A - Illumination system - Google Patents

Abstract

An illumination system including a first light source capable of outputting a first light, a second light source capable of outputting a second light, a third light source capable of outputting a third light, a fourth light source capable of outputting a fourth light, a first phosphor layer, a first light guide member and a second light guide member is provided. The first light guide member is disposed between light paths of the first light source and the second light source. The first light reaches the first phosphor layer, being converted to a fifth light. The second light reaches the first phosphor layer through the first light guide member, being converted to a sixth light. Each of the fifth light and the sixth light has a spectrum, and peak wavelengths of the spectrums of the fifth light and the sixth light is in a range from 625 nm to 740 nm, respectively.

Description

Lighting system

The present invention relates to a lighting system, and particularly to a lighting system suitable for a projector.

With the development of solid-state light sources and projection technologies in recent years, projection devices based on solid-state light sources such as light-emitting diodes (LEDs) and laser diodes have gradually gained market favor.

In a general projector architecture, a lighting system is usually provided to provide lighting light. The illumination light is converted into image light after passing through the light valve, and the image light can be projected on the screen or wall after passing through the projection lens. The brightness of the image light output by the projector depends on the brightness of the lighting light provided by the lighting system. In a general projector lighting system, one blue light source can output blue light to excite red phosphors to produce red light, and the other blue light source can output blue light to excite green phosphors to produce green light. In addition, the above-mentioned red light, green light, and another blue light output by the blue light source together form the three primary colors (RGB) of the illumination light output by the lighting system. In the conventional projector architecture, an additional blue light source is usually provided to provide blue light to the above green phosphor through other light paths to enhance the intensity of the green light excited by the green phosphor, thereby increasing The brightness of the output of the lighting system.

The invention provides a lighting system, the output light of which has a high brightness, and its component configuration is compact.

The lighting system according to the embodiment of the present invention includes a first light source, a second light source, a third light source, a fourth light source, a first phosphor powder layer, a first light guide, and a second light guide. The first light source can output a first light, the second light source can output a second light, the third light source can output a third light, and the fourth light source can output a fourth light. The first light guide is disposed between the light paths of the first light source and the second light source. The first light reaches the first phosphor layer and is converted into a fifth light, and the second light reaches the first phosphor layer through the first light guide and is converted into a sixth light. The fifth ray and the sixth ray have a spectrum, respectively, and the peak wavelengths of these spectra of the fifth ray and the sixth ray are respectively between 625 nm and 740 nm.

The lighting system according to the embodiment of the present invention includes a first light emitting element, a second light emitting element, a third light emitting element, a fourth light emitting element, a fifth light emitting element, a first phosphor layer, a second phosphor layer, and a first light emitting element. Light piece and second light combining piece. The first light emitting element can output a first light beam, the second light emitting element can output a second light beam, the third light emitting element can output a third light beam, the fourth light emitting element can output a fourth light beam, and the fifth light emitting element can output a fifth light beam. . The first phosphor layer is disposed between the light paths of the first light-emitting element and the second light-emitting element, and the second phosphor layer is disposed between the light paths of the third light-emitting element and the fourth light-emitting element. The first light combining element is disposed between the light paths of the first light emitting element and the second light emitting element, and the second light combining element is disposed between the light paths of the third light emitting element and the fourth light emitting element. The first beam enters the first phosphor layer and excites the sixth beam; the second beam enters the first phosphor layer through the first light combining member and excites the seventh beam; the third beam enters the second phosphor layer and excites The eighth beam; the fourth beam enters the second phosphor layer through the second light combining member and excites the ninth beam; the fifth beam, the sixth beam, the seventh beam, the eighth beam, and the ninth beam pass through the second beam Component output lighting system; the sixth and seventh beams respectively have a spectrum, and the difference between the peak wavelengths of the spectra of the sixth and seventh beams is less than 20 nm. The eighth and ninth beams have spectra, respectively, and the difference between the peak wavelengths of the spectra of the eighth and ninth beams is less than 20 nm.

Based on the above, in the lighting system of the related embodiment of the present invention, since the peak wavelength of the spectrum output by the lighting system is between 625 nm and 740 nm, the light increases. When the lighting system is applied to, for example, a projection device, the light output by the projection device has higher brightness. In addition, in the lighting system of the related embodiment of the present invention, since an additional two sets of light sources are provided to excite phosphors to respectively reinforce the output of the original set light sources, the internal space of the lighting system is properly used to increase the setting of light sources. The light output of the lighting system is strengthened, so that the components of the lighting system are compactly configured, and their useless space is reduced.

In order to make the above features and advantages of the present invention more comprehensible, embodiments are hereinafter described in detail with reference to the accompanying drawings.

The so-called optical element in the present invention means that the element is composed of a part or all of a material that can be reflected or penetrated, and usually includes glass or plastic. The so-called lens in the present invention refers to an optical element that allows at least part of light to penetrate, and at least one of the light-entry surface or light-exit surface is not a flat surface, such as a flat glass, which is not a lens. The so-called light combining in the present invention means that more than one light beam can be combined into one light beam and output. The so-called light splitting in the present invention means that one light beam can be divided into several light beams and output.

FIG. 1 is a schematic structural diagram of a lighting system and a projection device using the lighting system according to an embodiment of the present invention. Please refer to FIG. 1. In this embodiment, the projection device 200 includes an illumination system 100, a light valve 210 and a projection lens 220. The lighting system 100 includes a light source S1, a light source S2, a light source S3, a light source S4, a light source S5, a phosphor layer P1, a phosphor layer P2, a light guide G1, and a light guide G2.

The design of each component will be described separately below. In this embodiment, the light source S1 can output the light L1, the light source S2 can output the light L2, the light source S3 can output the light L3, the light source S4 can output the light L4, and the light source S5 can output the light L8. The light source S1, the light source S2, the light source S3, the light source S4, and the light source S5 respectively include, for example, a laser diode (LD) chip, a light-emitting diode (LED) chip, or a light-emitting diode (LED) chip capable of emitting various visible light. Any one of the aforementioned packages. In this embodiment, the light source S1, light source S2, light source S3, light source S4, and light source S5 include a blue light emitting diode chip, and the colors of the light rays L1, L2, light L3, light L4, and light L8 are substantially blue. The light rays L1, L2, L3, L4, and L8 each have a spectrum. The spectrum refers to a pattern formed by the sequential arrangement of light according to the wavelength of the light. In detail, the peak wavelengths of these spectra of light L1, light L2, light L3, light L4, and light L8 are respectively between 400 nm and 475 nm, where the peak wavelength of the light spectrum is The wavelength at which the light intensity is maximum. More specifically, light L1, light L2, light L3, light L4, and light L8 each have a corresponding spectral energy distribution curve in a spectral energy distribution map, and the peaks of the distribution curve are It falls in the wavelength range of blue (for example, 450 nm to 475 nm). In addition to the light emitting chip itself, the light source S1, the light source S2, the light source S3, the light source S4, and the light source S5 can also be optionally provided with a lens (not labeled) with a diopter to converge the divergent direction of light. In this example, the aforementioned lens is not provided above each light source.

In addition, the phosphor layers P1 and P2 referred to in the present invention refer to at least one optical element containing a phosphor. More specifically, the phosphor layers P1 and P2 are transparent colloids infiltrated with phosphor powder; a fluorescent wheel; a fluorescent sheet or other optical elements including fluorescent powder and having a wavelength conversion function. In this embodiment, the phosphor layer P1 is disposed on the optical path of the light source S1, that is, the phosphor layer P1 is disposed on the transmission path of the light L1. The phosphor layer P2 is disposed on the optical path of the light source S3, that is, the phosphor layer P2 is disposed on the transmission path of the light L3. The phosphor layer P1 and the phosphor layer P2 can receive excitation light and generate converted light by a photoluminescence phenomenon. Specifically, for example, the phosphor layer P1 can receive the blue light of the light L1 and generate the light L5, and can also receive the blue light of the light L2 and generate the light L6. The light rays L5 and L6 respectively have a spectrum, and the peak wavelengths of these spectra of the light rays L5 and L6 are respectively between 625 nm and 740 nm. In this example, the positions of the light source S2 and the light source S1 can be adjusted. More specifically, light L5 and light L6 respectively have a corresponding spectral energy distribution curve in a spectral energy distribution map, and the peaks of this distribution curve fall in red (for example, 625 nm to 740 nm) In the wavelength range. In addition, the phosphor layer P2 can receive, for example, the blue light of the light L3 and generate the light L7, and can also receive the blue light of the light L8 and generate the light L9. The light rays L7 and L9 respectively have a spectrum, and the peak wavelengths of these spectra of the light rays L7 and L9 are between 495 nm and 570 nm. More specifically, light L7 and light L9 each have a corresponding spectral energy distribution curve in a spectral energy distribution map, and the peaks of this distribution curve fall in green (for example, 495 nm to 570 nm). In the wavelength range.

Furthermore, the light guide G1 and light guide G2 of the present invention refer to a light splitter, a polarizer, a filter, a mirror, a lens, a flat glass, a prism, an integrating rod, a light guide rod, or at least one of the foregoing. A combination of one. In detail, a spectroscope refers to an optical element with a spectroscopic function, such as a half mirror, a polarizing plate that uses P and S polarized light, various wave plates, various prisms that use angles of incidence, and wavelengths that use wavelengths. Film and so on. Specifically, in this embodiment, the light guide G1 and the light guide G2 have wavelength selectivity, and are dichroic sheets for separating light by using a wavelength (color), such as a dichroic mirror (DM). In a related embodiment, the light guide G1 and the light guide G2 may be independently provided, optical elements having a color separation function, and may also be a color separation film or a coating plated on other members. The present invention does not This is the limit. In this example, the light guide G1 can reflect blue light, allow red light to penetrate, and reflect green light. The light guide G2 can reflect blue light and let other colors of light penetrate.

In this embodiment, the light guide G1 is disposed between the light paths of the light source S1 and the light source S2 and between the light paths of the light source S3 and the light source S5. Specifically, the light guide G1 is disposed on a transmission path of the light ray L2 emitted by the light source S2 and on a transmission path of the light ray L8 emitted by the light source S5. In addition, the light guide G2 is disposed between the light source S1 and the optical path of the light source S2, that is, the light guide G2 is disposed on a transmission path of the light L2 emitted from the light source S2. Specifically, the light guide G1 can reflect blue light and let green light pass through. The light guide G2 can reflect blue light and let green and red light pass through. In this embodiment, the light rays L4, L5, L6, L7, and L9 are respectively output to the lighting system 100 through the light guide G2 to form illumination light.

In detail, the lighting system 100 may further include a light uniformity element, which is disposed on the transmission path of the illumination light, so as to make the intensity distribution of the illumination light uniform. Specifically, the light uniformity element may be an optical element such as a fly-eye lens or a light integration rod, and the present invention is not limited thereto. In addition, the lighting system 100 may further include other optical elements, such as lenses, diffusers, reflectors, or prisms, etc. according to the actual needs, and the present invention is not limited thereto.

The light valve 210 of the present invention contains a plurality of independent units, which are spatially arranged in a one-dimensional or two-dimensional array. Each unit can be independently controlled by optical or electrical signals, using various physical effects (Pockels effect, Kerr effect, acousto-optic effect, magneto-optic effect, semiconductor self-optical effect, photorefractive effect, etc.) to change itself The optical characteristics of the light are modulated to illuminate the illumination light in the plurality of independent units and output image light. Independent units are optical elements such as micro-mirrors and liquid crystal cells. In detail, the light valve 210 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 example, the light valve is a digital micromirror element. However, in other embodiments, the light valve 210 may also be a transmissive liquid crystal panel or other spatial light modulator. The present invention is not limited thereto. The light valve 210 and the lighting system 100 may include an optical element (not shown) such as a total reflection prism or a retro total reflection prism.

In addition, the projection lens 220 is composed of at least one lens. The projection lens 220 may be provided with an aperture light bar or a light path, and at least one lens is provided at the front and rear of the aperture light bar to adjust the shape and aberration of the image light.

The following exemplifies the arrangement of the elements of the projection device 200 and the transmission process of light. In this embodiment, the light source S1 outputs blue light L1, and the blue light L1 reaches the phosphor layer P1 and is converted into a red light L5. The light source S2 outputs blue light L2, reaches the phosphor layer P1 through the light guide G1, and is converted into red light L6. In detail, the light L2 is sequentially reflected on the light guide G2 and the light guide G1 and transmitted to the phosphor layer P1. The light guide G2 is inclined with respect to the light source S2, so that the incident angle of the light L2 to the light guide G2 is, for example, an angle of 45 degrees. The light guide G2 and the light guide G1 are also substantially parallel. Specifically, after the red light L5 and the light L6 leave the phosphor layer P1, the red light L5 and the light L6 are reflected on the light guide G1 and pass through the light guide G2. In addition, the light source S3 outputs a blue light L3, and the light L3 reaches the phosphor layer P2 and is converted into a green light L7. The light source S5 outputs blue light L8, and the light L8 reaches the phosphor layer P2 through the light guide G1 and is converted into green light L9. In detail, the blue light L8 is reflected on the light guide G1 and transmitted to the phosphor layer P2. The light guide G1 is inclined with respect to the light source S5, so that the incident angle of the light L8 to the light guide G1 is, for example, an angle of 45 degrees. Specifically, after the green light L7 and the light L9 leave the phosphor layer P2, the light L7 and the light L9 pass through the light guide G1 and the light guide G2 in this order. In addition, the light source S4 outputs blue light L4, and the light L4 is reflected on the light guide G2.

In this embodiment, the light L4 reflected on the light guide G2 and the light L5, light L6, light L7, and light L9 passing through the light guide G2 are combined into illumination light and output from the lighting system 100. Specifically, the color of the light ray L4 is, for example, blue, the colors of the light ray L5 and the light ray L6 are, for example, red, and the colors of the light ray L7 and the light ray L9 are, for example, green. Therefore, the light rays L4, L5, L6, L7, and L9 can provide three primary colors (RGB) of the illumination light. In this embodiment, the illumination light is transmitted to the light valve 210, and the light valve 210 is used to convert the illumination light into the projection light IM. In addition, the projection lens 220 is used to project the projection light IM onto an imaging plane or a screen (not shown) to form an image frame.

The aforementioned red light means that the peak wavelengths of the light spectrum are between 625 nm and 740 nm, respectively. Therefore, the light (red light) with a peak wavelength of the spectrum output by the illumination system 100 between 625 nm and 740 nm increases, so that the light output by the projection device 200 has higher brightness. In addition, in this embodiment, the lighting system 100 is provided with the light source S1 and the light source S2 to provide the light L1 and the light L2 to excite the phosphor layer P1, and the lighting system 100 is provided with the light source S3 and the light source S5 to provide the light L3 and the light, respectively. L8 to excite the phosphor layer P2. In other words, the lighting system 100 sets an additional two sets of light sources to excite the phosphor, so as to respectively reinforce the outputs of the original set light sources. Therefore, the internal space of the lighting system 100 is properly utilized to enhance the light output of the lighting system 100 by increasing the setting of light sources, so that the components of the lighting system 100 are compactly configured, and the useless space thereof is reduced.

Please continue to refer to FIG. 1, and the related components of this embodiment are described in another description manner below. In this embodiment, the light emitting element E1, the light emitting element E2, the light emitting element E3, the light emitting element E5, the light emitting element E4, the phosphor layer P1 ', the phosphor layer P2', the light combining member C1, and the light combining member C2 are included. .

The light-emitting element of the present invention refers to an optical element capable of generating light. More specifically, the light-emitting element refers to a light-emitting diode chip, a laser diode chip, a module packaged from the foregoing chip, or other elements or a combination thereof capable of achieving the same effect.

The light combining member C1 and the light combining member C2 of the present invention refer to an optical element having a light combining function. In detail, the light-combining member C1 and the light-combining member C refer to a beam splitter, a polarizer, a filter, a mirror, a lens, a plate glass, a prism, an integrating column, a light guide rod, or at least one of the foregoing. Of combination. Beamsplitters generally refer to, for example, half mirrors, polarizers that use P and S polarized light, various wave plates, various prisms that use angles of incidence, and beam splitters that use wavelengths. Specifically, in this embodiment, the light-combining element C1 and the light-combining element C2 have wavelength selectivity, and are dichroic sheets for separating light with a wavelength (color), such as a dichroic mirror (DM). In a related embodiment, the light combining member C1 and the light combining member C2 may be independently provided, or may be a color separation film or a coating plated on other members, which is not limited in the present invention. The light beam B1, light beam B2, light beam B3, light beam B4, light beam B5, light beam B6, light beam B7, light beam B8, and light beam B9 are similar to the description of the previous example, so they will not be repeated here.

FIG. 2 is a schematic structural diagram of a lighting system and a projection device using the lighting system according to another embodiment of the present invention. Please refer to FIG. 2. In this embodiment, the illumination system 300 and the projection device 400 are similar to the illumination system 100 and the projection device 200 in the embodiment of FIG. 1, and the differences are as follows. In this embodiment, the projection device 400 includes an illumination system 300, a light valve 410, and a projection lens 420. The lighting system 300 includes a light emitting element E1, a light emitting element E2, a light emitting element E3, a light emitting element E4, a light emitting element E5, a phosphor layer P1 ', a phosphor layer P2', a light combining member C1, and a light combining member C2.

The design of each component will be described separately below. In this embodiment, the light emitting element E1 can output a light beam B1, the light emitting element E2 can output a light beam B2, the light emitting element E3 can output a light beam B3, the light emitting element E4 can output a light beam B4, and the light emitting element E5 can output a light beam B5. In this embodiment, the light emitting element E1, the light emitting element E2, the light emitting element E3, the light emitting element E4, and the light emitting element E5 include, for example, a blue light emitting diode wafer, and the light beam B1, light beam B2, light beam B3, light beam B4, and light beam The color of B5 is, for example, substantially blue. Beam B1, Beam B2, Beam B3, Beam B4, and Beam B5 each have a spectrum, and the peak wavelengths of these spectra of Beam B1, Beam B2, Beam B3, Beam B4, and Beam B5 are between 400 nm and 475 nm, respectively between. In addition, in this embodiment, the operation modes of the light beam B1, light beam B2, light beam B3, light beam B4, and light beam B5 are similar to the light beam L1, light beam L2, light beam L3, light beam L4, and light beam L8 in the embodiment of FIG. More details.

In addition, in this embodiment, the phosphor layer P1 'is disposed between the light paths of the light-emitting element E1 and the light-emitting element E2, and the phosphor layer P2' is disposed between the light paths of the light-emitting element E3 and the light-emitting element E4. The phosphor layer P1 'can receive, for example, the blue light of the light beam B1 and generate the light beam B6, and can also receive the blue light of the light beam B2 and generate the light beam B7. The light beams B6 and B7 respectively have a spectrum, and the peak wavelengths of these spectra of the light beams B6 and B7 are respectively between 495 nm and 570 nm. The difference between the peak wavelengths of the spectra of the light beams B6 and B7 is, for example, less than 20 nm. Specifically, the colors of the light beams B6 and B7 are, for example, green. In this embodiment, the operation modes of the light beams B6 and B7 are similar to the light rays L7 and L9 in the embodiment of FIG. 1, and details are not described herein again. In addition, the phosphor layer P2 'can receive, for example, the blue light of the light beam B3 and generate the light beam B8, and can also receive the blue light of the light beam B4 and generate the light beam B9. The light beams B8 and B9 each have a spectrum, and the peak wavelengths of these spectra of the light beams B8 and B9 are respectively between 625 nm and 740 nm. The difference between the peak wavelengths of the spectra of the light beams B8 and B9 is, for example, less than 20 nm. Specifically, the colors of the light beams B8 and B9 are, for example, red. In this embodiment, the light beams B8 and B9 are similar to the light rays L5 and L6 in the embodiment in FIG. 1, and details are not described herein again.

Furthermore, in this embodiment, the light combining element C1 is disposed between the light paths of the light emitting element E1 and the light emitting element E2, and the light combining element C2 is disposed between the light paths of the light emitting element E3 and the light emitting element E4. The relative relationship between the light combining member C1 and the light combining member C2 is similar to the light guide member G1 and the light guide member G2 in the embodiment of FIG. 1, and details are not described herein again. The light combining member C1 can reflect the light beam B5 and can pass the light beam B6, the light beam B7, the light beam B8, and the light beam B9. The light combining member C2 can reflect the light beams B8 and B9 and can pass the light beams B5, B6, and B7. In this embodiment, the light beam B5, light beam B6, light beam B7, light beam B8, and light beam B9 are respectively output to the lighting system 100 through the light combining member C2 to form illumination light.

In this embodiment, the relevant descriptions of the light valve 410 and the projection lens 420 may refer to the relevant descriptions of the light valve 210 and the projection lens 220 in the embodiment of FIG. 1 respectively, and details are not described herein again.

The following exemplifies the arrangement of the elements of the projection device 400 and the transmission process of light. In this embodiment, the light emitting element E1 outputs a light beam B1, and the light beam B1 enters the phosphor layer P1 'and excites the light beam B6. The light emitting element E2 outputs a light beam B2, and the light beam B2 enters the phosphor layer P1 'through the light combining member C1 and excites the light beam B7. Specifically, the light beam B2 is reflected on the light combining member C1 and transmitted to the phosphor layer P1 '. After the light beams B6 and B7 leave the phosphor layer P1 ', the light beams B6 and B7 pass through the light combining member C1 and the light combining member C2 in this order. In addition, the light emitting element E3 outputs a light beam B3, and the light beam B3 enters the phosphor layer P2 'and excites the light beam B8. The light emitting element E4 outputs a light beam B4, and the light beam B4 enters the phosphor layer P2 'through the light combining member C2 and excites the light beam B9. Specifically, the light beam B4 passes through the light combining member C2 and is transmitted to the phosphor layer P2 '. After the light beams B8 and B9 leave the phosphor layer P2 ', the light beams B8 and B9 are reflected on the light combining member C2. In addition, the light emitting element E5 outputs a light beam B5, and the light beam B5 passes through the light combining element C2 after being reflected on the light combining element C1.

In this embodiment, the light beams B8 and B9 reflected on the light combining element C2 and the light beams B5, B6, and B7 passing through the light combining element C2 are combined into illumination light and output from the lighting system 300. Specifically, the color of the light beam B5 is, for example, blue, the colors of the light beams B6 and L7 are, for example, green, and the colors of the light beams B8 and B9 are, for example, red. Therefore, the light beams B5, B6, B7, B8, and B9 can provide the three primary colors of the illumination light.

In detail, the lighting system 300 and the projection device 400 can obtain at least technical effects similar to those of the lighting system 100 and the projection device 200 in the embodiment of FIG. 1. The light output by the projection device 400 has a higher brightness. In addition, the internal space of the lighting system 300 is properly utilized to increase the light output of the lighting system 300 by increasing the setting of light sources, so that the components of the lighting system 300 are compactly configured and the useless space is reduced.

Please continue to refer to FIG. 2, and the related components of this embodiment are described below in a second description manner. In this embodiment, the light source S3, the light source S5, the light source S1, the light source S2, the light source S4, the phosphor layer P2, the phosphor layer P1, the light guide G2, and the light guide G1 are included. In addition, as far as the travel mode is concerned, beam B1 is similar to light L3, beam B2 is similar to light L8, beam B3 is similar to light L1, beam B4 is similar to light L2, beam B5 is similar to light L4, and beam B6 is similar to light L7. The light beam B7 is similar to the light beam L9, the light beam B8 is similar to the light beam L5, and the light beam B9 is similar to the light beam L6.

In this embodiment, the components described in the second description manner (for example, light source S1, light source S2, light source S3, light source S4, light source S5, phosphor layer P1, phosphor layer P2, light guide G1, Light guide G2, light L1, light L2, light L3, light L4, light L5, light L6, light L7, light L8, and light L9) can be referred to at least the description of the embodiment of FIG. 2 in the previous paragraph. This will not be repeated here.

In summary, in a related embodiment of the present invention, the light with a peak wavelength of the spectrum output by the lighting system between 625 nm and 740 nm increases. When the lighting system is applied to, for example, a projection device, the light output by the projection device has higher brightness. In addition, in the lighting system of the related embodiment of the present invention, since an additional two sets of light sources are provided to excite phosphors to respectively reinforce the output of the original set light sources, the internal space of the lighting system is properly used to increase the setting of light sources. The light output of the lighting system is strengthened, so that the components of the lighting system are compactly configured, and their useless space is reduced.

Although the present invention has been disclosed as above with the examples, it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some modifications and retouching without departing from the spirit and scope of the present invention. The protection scope of the present invention shall be determined by the scope of the attached patent application.

100, 300‧‧‧ lighting system

200, 400‧‧‧ projection device

210, 410‧‧‧light valve

220, 420‧‧‧ projection lens

B1, B2, B3, B4, B5, B6, B7, B8, B9

C1, C2‧‧‧combining light

E1, E2, E3, E4, E5‧‧‧Light-emitting elements

G1, G2‧‧‧ light guide

IM‧‧‧projected light

L1, L2, L3, L4, L5, L6, L7, L8, L9‧‧‧light

P1, P2, P1 ’, P2’‧‧‧ phosphor powder layer

S1, S2, S3, S4, S5‧‧‧

FIG. 1 is a schematic structural diagram of a lighting system and a projection device using the lighting system according to an embodiment of the present invention. FIG. 2 is a schematic structural diagram of a lighting system and a projection device using the lighting system according to another embodiment of the present invention.

Claims (10)

A lighting system includes: a first light source that can output a first light; a second light source that can output a second light; a third light source that can output a third light_; a fourth light source that can output A fourth light; a first light guide is disposed between the light paths of the second light source and the third light source; and a second light guide is disposed between the light paths of the third light source and the fourth light source A first phosphor layer is disposed between the second light source and the light path of the first light guide, the first phosphor layer can convert the first light into a fifth light, and the first The phosphor layer can convert the second light into a sixth light, the fifth light and the sixth light have a spectrum respectively, and the peak wavelengths of the spectra of the fifth light and the sixth light are respectively Between 625 nm and 740 nm; wherein the third light, the fourth light, the fifth light and the sixth light are output to the lighting system through the second light guide. The lighting system according to item 1 of the scope of patent application, wherein the first light, the second light, the third light, and the fourth light each have a spectrum, and the first light, the second light, the The peak wavelengths of the spectra of the third light and the fourth light are between 400 nm and 475 nm, respectively. According to the lighting system described in item 1 of the patent application scope, the lighting system further includes a second phosphor layer, which is disposed on the light path of the third light source, and the second phosphor layer can convert the third light It is a seventh light, the seventh light has a spectrum, and a peak wavelength of the spectrum of the seventh light is between 495 nm and 570 nm. The lighting system according to item 2 of the scope of patent application, wherein the lighting system further includes a fifth light source capable of outputting an eighth ray, the eighth ray has a spectrum, and a peak wavelength of the spectrum of the eighth ray Between 400 nanometers and 475 nanometers, the second phosphor layer is disposed between the light sources of the third light source and the fifth light source. The second phosphor layer can convert the eighth light into A ninth light, the ninth light has a spectrum, and a peak wavelength of the spectrum of the ninth light is between 495 nm and 570 nm, the first light guide can pass the ninth light, The second light guide can pass the ninth light, wherein the ninth light is output to the lighting system through the second light guide. The lighting system according to item 1 of the scope of patent application, wherein the first light, the second light, the third light, and the fourth light each have a spectrum, and the first light, the second light, the The peak wavelengths of the spectra of the third light and the fourth light are between 400 nm and 475 nm, respectively. The lighting system further includes a second phosphor powder layer disposed on the light path of the third light source. , The third light reaches the second phosphor layer and is converted into a seventh light, the seventh light has a spectrum, and a peak wavelength of the spectrum of the seventh light is between 495 nm and 570 nm In between, the first light guide and the second light guide are respectively a dichroic mirror. The first light guide can reflect the fifth light and the sixth light and can make the fourth light and the first light guide. Seven light rays pass through, the second light guide member can reflect the fourth light rays and can pass the fifth light rays, the sixth light rays, and the seventh light rays, wherein the fourth light rays, the fifth light rays, and the sixth light rays And the seventh light is output from the lighting system through the first light guide. A lighting system includes: a first light emitting element capable of outputting a first light beam; a second light emitting element capable of outputting a second light beam; a third light emitting element capable of outputting a third light beam; a fourth light emitting element A fourth light beam can be output; a fifth light emitting element can output a fifth light beam; a first phosphor layer is disposed between the first light emitting element and the light path of the second light emitting element; a second A phosphor layer is disposed between the light paths of the third light emitting element and the fourth light emitting element; a first light combining member is disposed between the light paths of the first light emitting element and the second light emitting element; a first A light combining element is disposed between the light paths of the third light emitting element and the fourth light emitting element; wherein the first light beam enters the first phosphor layer and excites a sixth light beam, and the second light beam passes through the light beam. A first light combining element enters the first phosphor layer and excites a seventh light beam; the third light beam enters the second phosphor layer and excites an eighth light beam; the fourth light beam passes through the second light combining element Enters the second phosphor layer and excites a ninth light The fifth light beam, the sixth light beam, the seventh light beam, the eighth light beam, and the ninth light beam output the lighting system through the second light combining member; the sixth light beam and the seventh light beam each have a Spectrum, and the difference between the peak wavelengths of the spectrums of the sixth and seventh beams is less than 20 nm, the eighth and ninth beams each have a spectrum, and the eighth and ninth beams have The difference between the peak wavelengths of the spectra is less than 20 nm. The lighting system according to item 6 of the scope of patent application, wherein the first light beam, the second light beam, the third light beam, the fourth light beam, the fifth light beam, the sixth light beam, the seventh light beam, the The eighth beam and the ninth beam each have a spectrum, and the peak wavelengths of the spectra of the first beam, the second beam, the third beam, the fourth beam, and the fifth beam are respectively 450 nm. Between 475 and 475 nm, the peak wavelengths of the spectra of the sixth and seventh beams are between 625 and 740 nm, respectively, and the spectra of the eighth and ninth beams The peak wavelengths are between 495 nm and 570 nm, respectively. The first light combining member and the second light combining member each include a dichroic mirror. The first light combining member can reflect the fifth light beam and can Passing the sixth light beam, the seventh light beam, the eighth light beam, and the ninth light beam, and the second light combining member can reflect the fifth light beam, the sixth light beam, and the seventh light beam and can make the first light beam Eight beams and the ninth beam pass. The lighting system according to item 6 of the scope of patent application, wherein the first light beam, the second light beam, the third light beam, the fourth light beam, the fifth light beam, the sixth light beam, the seventh light beam, the The eighth beam and the ninth beam each have a spectrum, and the peak wavelengths of the spectra of the first beam, the second beam, the third beam, the fourth beam, and the fifth beam are respectively 450 nm. Between 475 nm and 475 nm, the peak wavelengths of the spectra of the sixth beam and the seventh beam are between 495 nm and 570 nm, respectively, and the spectra of the eighth beam and the ninth beam The peak wavelengths are between 625 nm and 740 nm. The first light combining member and the second light combining member each include a dichroic mirror. The first light combining member can reflect the fifth light beam and can Passing the sixth light beam, the seventh light beam, the eighth light beam, and the ninth light beam, and the second light combining member can reflect the eighth light beam and the ninth light beam and can cause the fifth light beam, the first light beam, Six beams and the seventh beam pass. The lighting system according to item 6 of the scope of patent application, wherein the first light beam, the second light beam, the third light beam, the fourth light beam, and the fifth light beam each have a spectrum, and the first light beam, the The peak wavelengths of the spectra of the second light beam, the third light beam, the fourth light beam, and the fifth light beam are respectively between 450 nm and 475 nm. The lighting system according to item 6 of the scope of patent application, wherein the sixth beam, the seventh beam, the eighth beam, and the ninth beam each have a spectrum, and the sixth beam and the seventh beam are each The peak wavelengths of the spectra fall within a first wavelength range, and the peak wavelengths of the spectra of the eighth beam and the ninth beam fall within a second wavelength range, respectively. The first wavelength range and the first wavelength range One of the two wavelength ranges is in a range of 625 nm to 740 nm, and the other of the first wavelength range and the second wavelength range is in a range of 495 nm to 570 nm.