CN113253555B - Lighting system and method for manufacturing the same - Google Patents

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

Lighting system and method of manufacturing same

Technical field

The present invention relates to a lighting system and a manufacturing method thereof, and in particular to a lighting system suitable for a projector and a manufacturing method suitable for the lighting system.

Background technique

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

In a general projector architecture, a lighting system is usually set up 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 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 illumination light provided by the lighting system. In a general projector lighting system, a blue light source can output blue light to excite green phosphor to produce green light. The green light, the red light output by the red light source and the 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-mentioned green phosphor through other light paths to enhance the intensity of the green light excited by the green phosphor, thereby increasing the lighting system The brightness of the output light.

Contents of the invention

The present invention provides a lighting system and a manufacturing method thereof. The light output by the lighting system has higher brightness and better color gamut, and its components are compactly configured.

The lighting system of the embodiment of the present invention includes 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, and a fourth light source capable of outputting a fourth light. The fifth light source of the fifth ray. The illumination system also includes a wavelength conversion element disposed downstream of the light path of the first light source and the second light source. The wavelength conversion element can convert the first light and the second light into the first excitation light and the second excitation light respectively. The lighting system also includes a first beam splitter, a second beam splitter and a third beam splitter. The first beam splitter is disposed on the optical path of the first excitation light and the second excitation light, the second beam splitter is disposed on the optical path of the fourth ray, and the third beam splitter is disposed on the optical path of the fourth ray and the fifth ray. Among them, the wavelength peak difference between the fourth light and the fifth light spectrum is between 10 nanometers and 50 nanometers, and the arrangement of the first beam splitter, the second beam splitter and the third beam splitter can make the first excitation light, The second excitation light, the third light, the fourth light and the fifth light are guided to the same direction.

The lighting system of 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 wavelength conversion element, a first optical spectroscopic element, and a second optical spectroscopic element. The wavelength conversion element is arranged downstream of the optical path of the first light-emitting element, the first optical spectroscopic element is arranged downstream of the optical path of the first and second light-emitting elements, and the second optical splitting element is arranged between the third and fourth light-emitting elements. Downstream of the light path, the light emitted by the third light-emitting element can be penetrated, and the light emitted by the fourth light-emitting element can be reflected. Among them, the light emitted by the third light-emitting element and the light emitted by the fourth light-emitting element are unpolarized light of the same color system.

The manufacturing method of the lighting system according to the embodiment of the present invention includes the following steps. A first light source is provided to output a first light. A second light source is provided to output a second light. A third light source is provided to output a third light. A fourth light source is provided to output a fourth light. A fifth light source is provided, which can output a fifth light. A wavelength conversion element is disposed downstream of the optical path of the first light source and the second light source. The wavelength conversion element can convert the first light and the second light into a first excitation light and a second light respectively. Excite light. A first beam splitter is disposed on the optical path of the first excitation light and a second excitation light. A second beam splitter is disposed on the optical path of the fourth light beam. A third beam splitter is disposed on the optical path of the fourth light and the fifth light, wherein the wavelength peak difference between the fourth light and the fifth light spectrum is between 10 nanometers and 50 nanometers. time, and the arrangement of the first beam splitter, the second beam splitter, and the third beam splitter can make the first excitation light, the second excitation light, the third light, the The fourth light ray and the fifth light ray are guided to the same direction.

Based on the above, in related embodiments of the present invention, due to the increase in deep red light with a wavelength peak between 630 nanometers and 680 nanometers in the spectrum output by the lighting system, when the lighting system is applied to a projection device, for example, the projection device The output light has higher brightness and better color gamut. In addition, in the lighting system of the relevant embodiment of the present invention, since the internal space of the lighting system is properly utilized to enhance the light output of the lighting system by adding a deep red light source, the components of the lighting system are compactly configured and its useless space is reduced. .

The above description is only an overview of the technical solution of the present invention. In order to have a clearer understanding of the technical means of the present invention, it can be implemented according to the content of the description, and in order to make the above and other objects, features and advantages of the present invention more obvious and understandable. , the following is a detailed description of the preferred embodiments, together with the accompanying drawings.

Description of drawings

Figure 1 shows a schematic structural diagram of a projection device.

FIG. 2 is a schematic structural diagram of the lighting system according to the first embodiment of the present invention.

FIG. 3 is a schematic structural diagram of a lighting system according to a second embodiment of the present invention.

FIG. 4 is a schematic structural diagram of a lighting system according to a third embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a lighting system according to a fourth embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a lighting system according to a fifth embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a lighting system according to a sixth embodiment of the present invention.

FIG. 8 is a schematic structural diagram of a lighting system according to a seventh embodiment of the present invention.

FIG. 9 shows the spectral diagrams of the first excitation light, the second excitation light, the first light, the second light, the third light, the fourth light and the fifth light of various embodiments.

FIG. 10 shows the spectral diagrams of the second light guide member, the third light guide member, the fourth light ray and the fifth light ray in the embodiment in FIG. 5 .

Detailed ways

The so-called optical element in the present invention refers to an element that is partially or completely made of reflective or penetrating materials, usually including glass or plastic. The so-called lens in the present invention refers to an optical element that allows at least part of the light to pass through, and at least one of the light entrance surface or the light exit surface is not flat, such as flat glass, that is, it 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 for output. The so-called light splitting in the present invention means that a light beam can be divided into several light beams for output.

1 shows a schematic structural diagram of a projection device. The projection device 100 includes an illumination system 110, a light valve 120, a projection lens 130 and a light path adjustment mechanism 140. Wherein, the lighting system 110 has a light source 112, which is suitable for providing an illumination beam 114, and the light valve 120 is arranged on the transmission path of the light 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 light path adjustment mechanism 140 can be disposed between the light valve 120 and the projection lens 130, for example, between the light valve 120 and the internal total reflection prism 119 or between the internal total reflection prism 119 and the projection lens 130, and is located on the transmission path of the image beam 114a. In the above-mentioned projection device 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. The colored light emitted by each light-emitting diode is combined by a light combining device 116 to form an illumination beam 114. The illumination beam 114 will sequentially pass through the light uniformity element 117, such as a lens array or a light integration rod, a lens assembly 118 and a total internal reflection prism (TIRPrism) 119. The internal total reflection prism 119 then reflects the light beam 114 to the light valve 120 . At this time, the light valve 120 will convert the light beam 114 into the image light beam 114a, and these image light beams 114a will pass through the internal total reflection prism 119 and the light path adjustment mechanism 140 in sequence, and project these image light beams 114a on the screen 150 through the projection lens 130 superior.

FIG. 2 illustrates the lighting system 110a according to the first embodiment of the present invention. In this 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, and 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 light source S1, the second light source S2, the third light source S3, the fourth light source S4 and the fifth light source S5 respectively include, for example, a laser diode (LD) chip, a light-emitting diode (light-emitting diode) that can emit various visible lights. , LED) chip or any one of the packages of the above. In this 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 L1, the second light L2 and the third light L3 are substantially is blue. The fourth light source S4 includes a red light emitting diode chip, the fifth light source S5 includes a deep red light emitting diode chip, and the color of the fourth light L4 is essentially red, and the fifth light L5 The color is essentially dark red. The wavelength peak difference between the fourth ray and the fifth ray spectrum is between 10 nanometers and 50 nanometers, and the colors of the fourth ray and the fifth ray belong to the red color system in a broad sense.

In addition, the wavelength conversion element P1 is located downstream of the optical path of the first light source S1 and the second light source S2. P1 means that it includes at least one optical element containing phosphor. To be more specific, the wavelength conversion element P1 is a light-transmitting colloid impregnated with phosphor, a phosphor wheel, a phosphor sheet, or other optical elements that include phosphor and have a wavelength conversion function. For example, they have phosphor and can emit various Any of a visible light laser diode (LD) chip, a light-emitting diode (LED) chip, or a package of each of the foregoing. In this 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 L1 and the second light L2. The wavelength conversion element P1 can receive light and convert it to generate excitation light through photoluminescence. Specifically, the wavelength conversion element P1 can, for example, receive the blue light of the first light L1 and generate the green light of the first pump light PL1, or it can also receive the blue light of the second light L2 and generate the green light of the second pump light PL2. Light. The first excitation light PL1 and the second excitation light PL2 each have a spectrum, the wavelength peaks of these spectra are respectively between 490 nanometers and 590 nanometers, and the difference between the wavelength peaks of these spectra is less than 10 nanometers. More specifically, the first excitation light PL1 and the second excitation light PL2 each have a corresponding spectral energy distribution curve in a spectral energy distribution diagram, and the peak of this distribution curve falls in green (for example, between 490 nanometers to 590 nanometers).

Furthermore, the first light guide member G1a, the second light guide member G2a and the third light guide member G3a of the present invention refer to a beam splitter, a polarizing plate, a filter, an X-shaped plate, a reflecting mirror, a lens, a flat glass, Prisms, integrating rods, light guide rods, or a combination including at least one of the foregoing. Specifically, a beamsplitter generally refers to an optical element with a light-splitting function, such as a half-reflective half-mirror, a polarizer that uses P and S polarity splitting, various wave plates, various prisms that use the incident angle to split light, and wavelengths that use it. Spectrophotometer, etc. Specifically, in this embodiment, the first light guide member G1a, the second light guide member G2a, and the third light guide member G3a have wavelength selectivity, and are dichroic films that use wavelengths (colors) to separate light, such as Dichroic mirror (DM). In related embodiments, the first light guide member G1a, the second light guide member G2a, and the third light guide member G3a may be independently provided optical elements with a color separation function, or may be color separation components plated on other components. Color film or coating, the present invention is not limited thereto. In this embodiment, the first light guide G1a can reflect the blue light L1 and L3 and transmit the green light PL1 and PL2, and the second light guide G2a can reflect the red light L4 and transmit the light of other colors. Penetrate, and the third light guide G3a can reflect the deep red light L5 and allow light of other colors to penetrate. In this embodiment, the third light L3, the fourth light L4, the fifth light L5, the first excitation light PL1 and the second excitation light PL2 are respectively output through the second light guide G2a and the third light guide G3a to form Illumination light 114.

Specifically, the illumination system 110a may further include a light uniformity element 117, which is disposed on the transmission path of the illumination light to uniformize the intensity distribution of the illumination light. Specifically, the light uniformity element 117 can be a fly-eye lens or an optical element such as a light integrating rod or a light integration rod, but the invention is not limited thereto. In another embodiment, the light uniformity element 117 may not be included. In addition, the illumination system 110a may also include other optical elements according to actual needs, such as lenses, diffusers, reflectors or prisms, etc., and the present invention is not limited thereto.

The light valve 120 of the present invention contains many independent units, which are spatially arranged into a one-dimensional or two-dimensional array. Each unit can be independently controlled by optical signals or electrical signals, using various physical effects (Pockels effect, Kerr effect, acousto-optic effect, magneto-optical effect, semiconductor self-electro-optical effect, photorefractive effect etc.) changes its own optical characteristics, thereby modulating the illumination light illuminating the plurality of independent units and outputting image light. Independent units are optical components such as micro-mirrors and liquid crystal units. 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 example, the light valve is a digital micromirror element. However, in other embodiments, the light valve 120 can also be a transmissive liquid crystal panel or other spatial light modulator, and the present invention is not limited thereto.

In addition, the projection lens 130 is composed of at least one lens. The projection lens 130 may be provided with an aperture diaphragm, or aperture, inside, and at least one lens is provided at the front and rear of the aperture diaphragm to adjust the shape and aberration of the image light.

The following is an exemplary description of the arrangement of each element of the lighting system 110a in the first embodiment of FIG. 2 and the light transmission process. In this embodiment, the first light source S1 outputs a blue first light L1, which is reflected by the first light guide G1a and reaches the wavelength conversion element P1, and is excited and converted into a green first excitation light PL1. 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 tilted relative to the first light source S1, so that the incident angle of the first light L1 to the first light guide G1a is, for example, approximately 45 degrees. Specifically, when the green first excitation light PL1 and the second excitation light PL2 leave the wavelength conversion element P1 through reflection and/or transmission, pass through the first light guide G1a, and reach the second light guide G2a and the second light guide G2a. The three light guide members G3a pass through each other, the second light guide member G2a is substantially parallel to the first light guide member G1a, and the third light guide member G3a is substantially perpendicular to the second light guide member G2a. In addition, the third light source S3 outputs a blue third light L3, and the third light L3 is reflected by the first light guide G1a, reaches the second light guide G2a and the third light guide G3a, and passes through. The fourth light source S4 outputs a red fourth light L4, and the fourth light L4 is reflected by the second light guide G2a and reaches the third light guide G3a and penetrates, the fifth light source S5 outputs a deep red fifth light L5, and The fifth light L5 is reflected by the third light guide G3a, reaches the second light guide G2a, and passes through.

In this embodiment, the above-mentioned first excitation light PL1, second excitation light PL2, and third light L3 penetrating the second light guide G2a and the third light guide G3a, and the above-mentioned first excitation light PL1, second excitation light PL2, and third light L3 penetrating the second light guide G2a The fifth light L5 and the fourth light L4 penetrating the third light guide G3a are combined into illumination light 114 and output from the illumination system 110 . In detail, the color of the third light L3 is, for example, blue, the colors of the fourth light L4 and the fifth light L5 are, for example, red and dark red, and the colors of the first excitation light PL1 and the second excitation light PL2 are, for example, green. . Therefore, the first excitation ray PL1, the second excitation ray PL2, the third ray L3, the fourth ray L4 and the fifth ray L5 can provide three primary colors (RGB) of illumination rays. In this 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 beam 114a. In addition, the projection lens 130 is used to project the image beam 114a onto an imaging plane or the screen 150 to form an image frame.

Please refer to Figure 9 for the spectral diagram of each of the above-mentioned luminous rays. The aforementioned blue light (L1, L2, L3) refers to the wavelength peak of the light spectrum ranging from 400 nanometers to 460 nanometers. The aforementioned green excitation light (PL1, PL2) refers to the wavelength peak of the light spectrum between 490 nanometers and 590 nanometers. The aforementioned red light (L4) refers to the wavelength peak of the light spectrum between 600 nanometers and 630 nanometers. The aforementioned deep red light (L5) refers to the wavelength peak of the light spectrum between 630 nanometers and 680 nanometers. Therefore, the light (deep red light) with a wavelength peak between 630 nanometers and 680 nanometers in the spectrum output by the illumination system 110 increases, so that the light output by the projection device 100 has higher brightness and a better color gamut. Among them, 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 convert it into green first excitation light and second excitation light. However, it is also possible to use only the blue light of one light source to excite the wavelength conversion element. In this case, the lighting system can output the three primary colors (RGB) of the illumination light using only four light sources. In addition, in another embodiment, the blue light emitted by the first light source and the second light source can also be used to excite the wavelength conversion element and convert it into the first red excitation light and the second excitation light. At this time, the fourth light The color of L4 is essentially green, and the color of the fifth ray L5 is essentially dark green. The wavelength peak difference between the fourth ray and the fifth ray spectrum is between 10 nanometers and 50 nanometers, and the colors of the fourth ray and the fifth ray belong to the green color system in a broad sense. Furthermore, in another embodiment, both the red light and the deep red light are unpolarized light.

Please refer to FIG. 3 for description of the lighting system 110b according to the second embodiment of the present invention. In this embodiment, the lighting system 110b is similar to the lighting system 100a in the embodiment of FIG. 2, with the main differences being as follows. In this embodiment, the green first excitation light PL1 and the second excitation light PL2, and the blue third light L3 reach the second light guide G2b through the first light guide G1b and penetrate therethrough. The fourth red light L4 penetrates the third light guide G3b and reaches the second light guide G2b, and is reflected by the second light guide G2b. The dark red fifth light L5 is reflected by the third light guide G3b and reaches the second light guide G2b. light guide G2b, and is reflected by the second light guide G2b. Thereby, the first excitation light PL1, the second excitation light PL2, the third light L3 that penetrate the second light guide G2b and the fourth light L4 and the fifth light L5 reflected by the second light guide G2b are combined into illumination. Light 114 is output from lighting system 110b.

Please refer to FIG. 4 for description of the lighting system 110c according to the third embodiment of the present invention. In this embodiment, the lighting system 110c is similar to the lighting system 100a of the embodiment of FIG. 2, with the main differences being as follows. In this embodiment, the green first excitation light PL1 and the second excitation light PL2, and the blue third light L3 penetrate the second light guide G2c and the third light guide through the first light guide G1c. Part G3c. The fourth red light L4 is reflected through the second light guide G2c, reaches the third light guide G3c, and penetrates the third light guide G3c. The dark red fifth light L5 is reflected through the third light guide G3c. Thereby, the first excitation light PL1, the second excitation light PL2, the third light L3, the fourth light L4 that penetrate the third light guide G3c and the fifth light L5 reflected by the third light guide G3c are combined into illumination. Light 114 is output from lighting system 110c.

Please refer to FIG. 5 for description of the lighting system 110d according to the fourth embodiment of the present invention. In this embodiment, the lighting system 110d is similar to the lighting system 100a in the embodiment of FIG. 2, and the main differences are as follows. In this embodiment, the green first excitation light PL1 and the second excitation light PL2, and the blue third light L3 pass through the first light guide G1d to sequentially penetrate the second light guide G2d, the first The lens array 117a is reflected by the third light guide G3d. The fourth red light L4 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. The dark red fifth light L5 passes through the second lens array 117b and the third light guide G3d. Light guide G3d. Thereby, the fifth light L5 that penetrates the third light guide G3d and the first excitation light PL1, the second excitation light PL2, the third light L3 and the fourth light L4 reflected by the third light guide G3d are combined into Illumination light 114 is output from the lighting system 110d.

In addition, please refer to FIG. 10 for further description of the second light guide G2d, the third light guide G3d, the fourth light L4 and the fifth light L5 of this embodiment. The second light guide G2d is a beam splitter that utilizes wavelength splitting, which can highly transmit visible light with a wavelength below about 570 nm, but block visible light with a wavelength above about 590 nm. The third light guide G3d is also a beam splitter that uses wavelength splitting, but it blocks visible light with a wavelength below about 620 nm, but can highly transmit visible light with a wavelength above about 630 nm. Therefore, utilizing the characteristics of the second light guide G2d and the third light guide G3d, the red fourth light L4 can be blocked and reflected by the second light guide G2d and the third light guide G3d, but the dark red fifth light L4 The light L5 penetrates the third light guide G3d. In any light guide member in various embodiments of the present invention, a person with ordinary knowledge in this technical field can change the coating design to achieve the function of penetrating or blocking any of the above light rays.

Please refer to FIG. 6 for description of the lighting system 110e according to the fifth embodiment of the present invention. In this embodiment, the lighting system 110e is similar to the lighting system 100a in the embodiment of FIG. 2, and the main differences are as follows. In this embodiment, the green first excitation light PL1 and the second excitation light PL2 reach the second light guide G2e through the first light guide G1e and penetrate therethrough. The third blue light L3 is reflected by the second light guide G2e. The red fourth light L4 penetrates the third light guide G3e to the first light guide G1e, is reflected by the first light guide G1e, reaches the second light guide G2e and penetrates therethrough. The dark red fifth light L5 is reflected by the third light guide G3e, reaches the first light guide G1e, is 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 that penetrate the second light guide G2e and the third light L3 reflected by the second light guide G2e are combined into illumination. Light 114 is output from lighting system 110e.

Please refer to FIG. 7 for description of the lighting system 110f according to the sixth embodiment of the present invention. In this embodiment, the first light source S1 outputs the blue first light L1, penetrates the first light guide G1f, reaches the wavelength conversion element P1, and excites the first excitation light PL1 converted into green. 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 tilted relative to the first light source S1, so that the incident angle of the first light ray L1 to the first light guide G1f is, for example, approximately 45 degrees. Specifically, when the green first excitation light PL1 and the second excitation light PL2 leave the wavelength conversion element P1 through reflection and/or transmission, they are reflected by the first light guide G1f. The blue third light ray L3 is reflected by the second light guide member G2f and passes through the third light guide member G3f and the first light guide member G1f. The red fourth light L4 penetrates the second light guide member G2f, the third light guide member G3f and the first light guide member G1f. The deep red fifth light L5 is reflected by the third light guide G3f and penetrates the second light guide G2f and the first light guide G1f. Thereby, the third ray L3, the fourth ray L4 and the fifth ray L5 that penetrate the first light guide G1f and the first excitation ray PL1 and the second excitation ray PL2 reflected by the first light guide G1f are combined. is the illumination light 114 and is output from the illumination system 110f.

Please refer to FIG. 8 for description of the lighting system 110g according to the seventh embodiment of the present invention. In this embodiment, the lighting system 110g is similar to the lighting system 100a in the embodiment of FIG. 2, and the main differences are as follows. In this embodiment, the green first excitation light PL1 and the second excitation light PL2 penetrate the first light guide G1g. The blue third light ray L3 passes through the second light guide member G2g and the third light guide member G3g, and is reflected by the first light guide member G1g. The red fourth light L4 is reflected by the second light guide G2g, passes through the third light guide G3g, reaches the first light guide G1g, and is reflected by the first light guide G1g. The dark red fifth light L5 is reflected by the third light guide G3g, passes through 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 and the second excitation light PL2 passing through the first light guide G1g and the third light L3, the fourth light L4 and the fifth light L5 reflected by the first light guide G1g are combined into Illumination light 114 is output from the lighting system 110g.

The light-emitting element of the present invention refers to an optical element that can generate light. To be more specific, light-emitting components refer to light-emitting diode chips, laser diode chips, modules packaged by the aforementioned chips, or other components or combinations thereof that can achieve the same effect.

To sum up, in the relevant embodiments of the present invention, since the deep red light with a wavelength peak between 630 nanometers and 680 nanometers in the spectrum output by the lighting system 110 increases, when the lighting 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 of the relevant embodiment of the present invention, since the internal space of the lighting system is properly utilized to enhance the light output of the lighting system by adding a deep red light source, the components of the lighting system are compactly configured and its useless space is reduced. .

The above are only preferred embodiments of the present invention, and do not limit the present invention in any form. Although the present invention has been disclosed above in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with this field will Skilled personnel, without departing from the scope of the technical solution of the present invention, can use the methods and technical contents disclosed above to make slight changes or modifications to equivalent embodiments with equivalent changes. However, as long as they do not depart from the content of the technical solution of the present invention, Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims (8)

1. A lighting system, characterized in that it includes: a first light source that emits a first blue light; a second light source that emits a second blue light; a third light source; a fourth light source; a fifth light source that emits a third blue light; A first light splitting element located on the optical path of the first light source and the second light source; A second light splitting element is provided on the optical path of the third light source; a third light splitting element is provided on the optical path of the third light source and the fourth light source; and An optical element provided with phosphor is disposed between the light path of the first light source and the first light splitting element. The optical element can be excited to emit a green light; Wherein, the first blue light can be reflected to the optical element through the first spectroscopic element and the second blue light can illuminate the optical element to excite the optical element to generate the green light; and Wherein, the third light source and the fourth light source are red light sources with a wavelength ranging from 600 nanometers to 680 nanometers, and the wavelength peak difference between the two is between 10 nanometers and 50 nanometers. 2. The lighting system of claim 1, wherein the second light splitting element and the third light splitting element can be formed into an X shape. 3. The lighting system of claim 1, wherein the lighting system satisfies one of the following conditions: (1) further comprising a first lens array and a second lens array, the first lens array is located Between the second light splitting element and the third light splitting element, and the second lens array is located between the fourth light source and the third light splitting element, (2) does not include a lens array. 4. The lighting system of claim 1, wherein the peak wavelength of the third light source is between 600 nanometers and 630 nanometers, and the peak wavelength of the fourth light source is between 630 nanometers and 680 nanometers. between. 5. A lighting system, characterized in that it includes: a first light-emitting element capable of emitting a first blue light; a second light-emitting element capable of emitting a second blue light; a third light-emitting element; a fourth light-emitting element; a fifth light-emitting element capable of emitting a third blue light; A first optical spectroscopic element located downstream of the optical path of the first light-emitting element and the second light-emitting element; A second optical splitting element is disposed downstream of the optical path of the third light-emitting element and the fourth light-emitting element, allowing the non-polarized light emitted by the third light-emitting element to penetrate and causing the fourth light-emitting element to emit light. Unpolarized light emitted by the component is reflected; and An optical element provided with a phosphor layer is disposed between the light path of the first light-emitting element and the first optical splitting element, and the optical element can be excited to emit a green light; Wherein, the first blue light can be reflected to the optical element through the first optical splitting element and the second blue light can illuminate the optical element to excite the optical element to generate the green light; as well as Wherein, the peak wavelength of the non-polarized light emitted by the third light-emitting element is between 630 nanometers and 680 nanometers, and the peak wavelength of the non-polarized light emitted by the fourth light-emitting element is between 600 nanometers and 630 nanometers. between. 6. The illumination system of claim 5, wherein the wavelength peak difference between the non-polarized light emitted by the third light-emitting element and the non-polarized light emitted by the fourth light-emitting element is, Between 10nm and 50nm. 7. The lighting system of claim 5, wherein the lighting system satisfies one of the following conditions: (1) further comprising a first lens array and a second lens array, the first lens array is located Between the first optical beam splitting element and the second optical beam splitting element, and the second lens array is located between the third light emitting element and the second optical beam splitting element, (2) does not include a lens array . 8. The lighting system according to any one of claims 1 to 7, characterized in that it can be applied to a projector.