CN116974131A - Light combining structure and projection device - Google Patents

Light combining structure and projection device Download PDF

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Publication number
CN116974131A
CN116974131A CN202210422632.1A CN202210422632A CN116974131A CN 116974131 A CN116974131 A CN 116974131A CN 202210422632 A CN202210422632 A CN 202210422632A CN 116974131 A CN116974131 A CN 116974131A
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CN
China
Prior art keywords
light
beam splitter
spectroscope
light source
reflecting surface
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CN202210422632.1A
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Chinese (zh)
Inventor
简志雄
林明坤
吴宗训
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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Qisda Optronics Suzhou Co Ltd
Qisda Corp
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Application filed by Qisda Optronics Suzhou Co Ltd, Qisda Corp filed Critical Qisda Optronics Suzhou Co Ltd
Priority to CN202210422632.1A priority Critical patent/CN116974131A/en
Publication of CN116974131A publication Critical patent/CN116974131A/en
Pending legal-status Critical Current

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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
    • G03B21/2053—Intensity control of illuminating light
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The invention provides a light combining structure and a projection device. The first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface. The second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and the second light source is provided with a second reflecting surface. The second beam splitter is disposed on the third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially reflect and partially penetrate, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to reflect and then enter the fourth side of the first beam splitter.

Description

Light combining structure and projection device
Technical Field
The present invention relates to a light combining structure and a projection apparatus, and more particularly to a light combining structure and a projection apparatus for improving brightness of a solid-state light source.
Background
Solid-state lighting (solid-state lighting) refers to a lighting technology using a solid-state light-emitting element, i.e., a semiconductor element, such as a light-emitting diode, an organic light-emitting semiconductor, a polymer light-emitting diode, or the like, as a light source, and has the characteristics of low power consumption, long life, rich color, shock resistance, strong controllability, and the like. In recent years, the solid-state lighting industry has developed rapidly, and the solid-state lighting industry is matched with the energy-saving industry as an important measure for energy conservation and emission reduction so as to replace the traditional incandescent bulb with high energy consumption. However, when the light intensity of a single solid state light emitting device is insufficient to meet the required luminous flux of the light source, the light intensity needs to be enhanced by combining a plurality of solid state light emitting devices, so as to increase the overall brightness of the light source.
Therefore, it is necessary to design a novel light combining structure and a projection device to overcome the above-mentioned drawbacks.
Disclosure of Invention
The invention provides a light combining structure and a projection device, which are used for increasing the overall brightness of a light source.
In order to achieve the above object, the present invention provides a light combining structure, comprising: a first spectroscope; the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface; the second light source is arranged at the second side of the first spectroscope and used for emitting second light rays, and the second light source is provided with a second reflecting surface; and the second beam splitter is arranged on the third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially penetrate through the reflecting part, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to enter the fourth side of the first beam splitter after being reflected.
Preferably, the first side is opposite to the third side, and the second side is opposite to the fourth side.
Preferably, the light source further comprises a third light source disposed at one side of the second beam splitter for emitting a third light, the first beam splitter allows the third light to partially reflect and partially transmit, and the second beam splitter allows the third light to transmit.
Preferably, the first light and the second light are of the same color, and the third light, the first light and the second light are of different colors.
Preferably, the first light source and the second light source are respectively provided with a fluorescent body, and the fluorescent body is excited by the third light to generate the same color light as the first light and the second light.
Preferably, the method further comprises: the third spectroscope is arranged on the fourth side of the first spectroscope; the fourth spectroscope is arranged on the fourth side of the first spectroscope; the fourth light source is arranged on the fifth side of the third spectroscope and used for emitting fourth light; and a fifth light source disposed on a sixth side of the third beam splitter for emitting a fifth light, wherein the third beam splitter allows the first light and the second light to be reflected, the fourth beam splitter allows the first light and the second light to be transmitted, the third beam splitter allows the fourth light to be transmitted, the third beam splitter allows the fifth light to be transmitted, the fourth beam splitter allows the fourth light to be transmitted, and the fourth beam splitter allows the fifth light to be reflected.
Preferably, the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the fifth light is of different colors with the first light, the second light, the third light and the fourth light respectively.
Preferably, the method further comprises: the third spectroscope is arranged at one side of the second spectroscope; the fourth spectroscope is arranged on the other side of the second spectroscope; the third light source is arranged on the ninth side of the fourth spectroscope and used for emitting third light rays; and a fourth light source disposed on a tenth side of the fourth beam splitter for emitting a fourth light, wherein the third beam splitter allows the third light and the fourth light to be reflected and then enter the fourth side of the first beam splitter, the third beam splitter allows the first light and the second light to pass through, the fourth beam splitter allows the third light to be reflected, and the fourth beam splitter allows the fourth light to pass through.
Preferably, the first light and the second light are the same color light, and the third light, the fourth light, the first light and the second light are different color lights.
Preferably, the method further comprises: a third spectroscope; the third light source is arranged on the seventh side of the third spectroscope and used for emitting third light rays, and the third light source is provided with a third reflecting surface; the fourth light source is arranged on the sixth side of the third spectroscope and used for emitting fourth light, and the fourth light source is provided with a fourth reflecting surface; and a fourth spectroscope disposed on a fifth side of the third spectroscope, wherein the third spectroscope allows the third light and the fourth light to partially penetrate through the third reflecting surface, the fourth reflecting surface and the fourth spectroscope allow the third light and the fourth light to enter a fourth side of the third spectroscope after being reflected, the fifth side is opposite to the seventh side, the sixth side is opposite to the eighth side, and the third spectroscope and the first spectroscope are in a mirror configuration.
Preferably, the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the third light, the fourth light, the first light and the second light are of different colors.
Preferably, the method further comprises: the fifth spectroscope is arranged between the first spectroscope and the third spectroscope; the sixth spectroscope is arranged between the first spectroscope and the third spectroscope; and a fifth light source disposed at one side of the fifth beam splitter and the sixth beam splitter for emitting a fifth light, wherein the fifth beam splitter allows the first light and the second light to be reflected, the sixth beam splitter allows the first light and the second light to pass through, the fifth beam splitter allows the third light and the fourth light to pass through, the sixth beam splitter allows the third light and the fourth light to be reflected, and the fifth beam splitter and the sixth beam splitter allow the fifth light to pass through.
Preferably, the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the fifth light and the first light to the fourth light are of different colors.
Preferably, after the part of the third light beam passes through the third beam splitter, the third light beam splitter, the third reflecting surface and the fourth reflecting surface reflect and pass through the fourth beam splitter and then reach the eighth side of the third beam splitter.
Preferably, after being reflected by the third beam splitter, part of the fourth light reaches the eighth side of the third beam splitter after being reflected and penetrated by the fourth beam splitter, the third reflecting surface and the fourth reflecting surface.
Preferably, after the part of the first light beam penetrates through the first spectroscope, the part of the first light beam reaches the fourth side of the first spectroscope after being reflected and penetrated by the second spectroscope, the first reflecting surface and the second reflecting surface.
Preferably, after being reflected by the first beam splitter, part of the second light reaches the fourth side of the first beam splitter after being reflected and penetrated by the second beam splitter, the first reflecting surface and the second reflecting surface.
The invention also provides a light combining structure, which comprises: a first spectroscope; the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface; the second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and a second reflecting surface is arranged on the second light source; the first spectroscope allows the first light and the second light to partially penetrate through the reflecting part, the first reflecting surface, the second reflecting surface and the second spectroscope allow the first light and the second light to be reflected and then enter the fourth side of the first spectroscope, wherein the first light source and the second light source are respectively provided with a fluorescent body, and the fluorescent body is excited by the third light to generate fourth light.
Preferably, the fourth light, the first light and the second light are the same color light.
Preferably, the third light, the first light and the second light are different color lights.
The invention also provides a projection device which comprises any one of the light combining structures.
Compared with the prior art, the light combining structure and the projection device provided by the embodiment of the invention comprise a first spectroscope, a first light source, a second light source and a second spectroscope; the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface; the second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and the second light source is provided with a second reflecting surface; the second beam splitter is disposed on the third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially reflect and partially penetrate, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to reflect and then enter the fourth side of the first beam splitter. The light combining structure of the embodiment can be applied to a projector or an image output device with high brightness requirement to improve the overall brightness of a system light source so as to solve the problem that the light intensity of a single solid-state light-emitting element is insufficient and the luminous flux required by the light source cannot be met.
Drawings
Fig. 1A to fig. 1D are schematic views of optical paths of a light combining structure according to an embodiment of the invention;
fig. 2A and fig. 2B are schematic diagrams of a light combining structure according to an embodiment of the invention;
FIG. 3 is a schematic view of a light combining structure according to another embodiment of the present invention;
FIG. 4 is a schematic view of a light combining structure according to another embodiment of the present invention;
FIG. 5 is a schematic view of a light combining structure according to another embodiment of the present invention;
fig. 6 is a schematic view of a light combining structure according to another embodiment of the invention.
Detailed Description
For a further understanding of the objects, construction, features and functions of the invention, reference should be made to the following detailed description of the preferred embodiments.
Fig. 1A to 1D are schematic optical paths of a light combining structure 100 according to an embodiment of the invention. In the figure, the arrow indicates the direction in which light travels and the light emission intensity (for example, the light emission intensity per unit area, the unit is nit), and the larger the size of the arrow is, the stronger the light emission intensity is, whereas the smaller the size of the arrow is, the weaker the light emission intensity is. As shown in fig. 1A, the first light ray G1 is split into a first sub-beam g1_1 and a second sub-beam g1_2 by a first beam splitter DM1, the first beam splitter DM1 allows the first sub-beam g1_1 to pass through, and the first beam splitter DM1 allows the second sub-beam g1_2 to reflect. That is, the first beam splitter DM1 is a partially reflective partially transmissive beam splitter, and allows light with a specific wavelength to pass through and/or reflect. Taking the semi-reflective semi-transmissive first beam splitter DM1 as an example, the first sub-beam g1_1 has a light intensity about half that of the first light ray G1, and the second sub-beam g1_2 has a light intensity about half that of the first light ray G1.
As shown in fig. 1B, after the first sub-beam g1_1 passes through the first beam splitter DM1, the first sub-beam g1_1 is reflected by the second beam splitter DM2, and then, after the first sub-beam g1_1 is reflected to the first beam splitter DM1, the first sub-beam g1_1 is split into a third sub-beam g1_3 and a fourth sub-beam g1_4 by the first beam splitter DM1, the first beam splitter DM1 allows the third sub-beam g1_3 to pass through, and the first beam splitter DM1 allows the fourth sub-beam g1_4 to reflect. Taking the semi-reflective and semi-transmissive first beam splitter DM1 as an example, the third sub-beam g1_3 has a light intensity of about half that of the first sub-beam g1_1, and the fourth sub-beam g1_4 has a light intensity of about half that of the first sub-beam g1_1.
In the same way, in fig. 1C, the second light ray G2 may be split into a first sub-beam g2_1 and a second sub-beam g2_2 by the first beam splitter DM1, the first beam splitter DM1 allows the first sub-beam g2_1 to pass through, and the first beam splitter DM1 allows the second sub-beam g2_2 to reflect. Taking the semi-reflective semi-transmissive first beam splitter DM1 as an example, the first sub-beam g2_1 has a light intensity of about half that of the second light ray G2, and the second sub-beam g2_2 has a light intensity of about half that of the second light ray G2.
In fig. 1D, the second sub-beam g2_2 is reflected by the first beam splitter DM1 and then reflected by the second beam splitter DM2, and then the second sub-beam g2_2 is split into the third sub-beam g2_3 and the fourth sub-beam g2_4 by the first beam splitter DM1 after the second sub-beam g2_2 is reflected by the first beam splitter DM1, the first beam splitter DM1 allows the third sub-beam g2_3 to pass through, and the first beam splitter DM1 allows the fourth sub-beam g2_4 to reflect. Taking the semi-reflective semi-transmissive first beam splitter DM1 as an example, the third sub-beam g2_3 has a light intensity of about half that of the second sub-beam g2_2, and the fourth sub-beam g2_4 has a light intensity of about half that of the second sub-beam g2_2.
Under the condition of no light loss, the third sub-beam g1_3 and the fourth sub-beam g1_3 of the first light ray G1 and the third sub-beam g2_3 and the fourth sub-beam g2_4 of the second light ray G2 can be subdivided into more sub-beams through the first beam splitter DM1 and the second beam splitter DM2, and the purpose is to increase the overall brightness of the system light source, and the light combining structure 100 of the two adjacent side light sources partially reflects and penetrates the first light ray G1 and the second light ray G2, so that the problem that the light intensity of a single light source is insufficient and the light flux required by the system light source cannot be satisfied can be solved. The light combining structure 100 can be used as a system light source in a projector, for example.
Fig. 2A and fig. 2B are schematic diagrams of a light combining structure 100A according to an embodiment of the invention. The light combining structure 100A includes a first beam splitter DM1, a first light source 101, a second light source 102, and a second beam splitter DM2. The first light source 101 is disposed on the first side E11 of the first beam splitter DM1, and is configured to emit a first light ray G1, and the first light source 101 is provided with a first reflecting surface S1. The second light source 102 is disposed on the second side E12 of the first beam splitter DM1 for emitting the second light G2, and the second light source 102 is provided with a second reflecting surface S2. That is, the first light source 101 and the second light source 102 are disposed at the adjacent first side E11 and second side E12 (see fig. 2A) or at the opposite first side E11 and third side E13 (see fig. 2B), respectively. The first beam splitter DM1 allows the first light ray G1 and the second light ray G2 to partially reflect and partially transmit, and the contents thereof are described in detail in fig. 1A to 1D, which are not repeated herein.
In addition, the light emitting sides of the first light source 101 and the second light source 102 are respectively provided with a collimator (LS 1, LS 2), which is used for converging or concentrating the first light ray G1 and the second light ray G2 on the central light path of each light source so as to increase the luminous intensity of the center of each light source.
In this embodiment, the first light source 101 and the second light source 102 are solid-state light sources such as light emitting diodes, for example, a reflective sheet, a reflective layer and/or a light guiding structure is disposed at a rear side or a side adjacent to the rear side of the first light source 101, and a reflective sheet, a reflective layer and/or a light guiding structure is disposed at a rear side or a side adjacent to the rear side of the second light source 102. The surface of the reflecting sheet is provided with a coating film for reflecting light rays. For example, the third sub-beam g1_3 and the fourth sub-beam g1_4 in fig. 1B may respectively go forward toward the first light source 101 and the second light source 102, and the third sub-beam g1_3 and the fourth sub-beam g1_4 may respectively be reflected by the first reflecting surface S1 of the first light source 101 and the second reflecting surface S2 of the second light source 102 and be incident on the first beam splitter DM1 (see fig. 2A or 2B). In addition, in the same manner, the third sub-beam g1_3 and the fourth sub-beam g1_4 in fig. 1D may respectively advance toward the first light source 101 and the second light source 102, and the third sub-beam g1_3 and the fourth sub-beam g1_4 may respectively be reflected by the first reflecting surface S1 of the first light source 101 and the second reflecting surface S2 of the second light source 102 and be incident on the first beam splitter DM1 (see fig. 2A or 2B).
The first reflecting surface S1, the second reflecting surface S2 and the second beam splitter DM2 are similar in purpose, so as to allow the first light ray G1, the second light ray G2 and the sub-beam thereof to enter the fourth side E14 of the first beam splitter DM1 after at least one reflection. The second beam splitter DM2 is disposed on a third side E13 of the first beam splitter DM1, wherein the first side E11 is opposite to the third side E13, and the second side E12 is opposite to the fourth side E14. In an embodiment, the first reflecting surface S1 is substantially disposed on an extension line of the first light ray G1 in the light emitting direction, and the second reflecting surface S2 is substantially disposed on an extension line of the second light ray G2 in the light emitting direction.
The first light ray G1 and the second light ray G2 may be green light or other color light, wherein the first light source 101 and the second light source 102 are, for example, green light emitting diodes or light emitting diodes excited by blue light and ultraviolet light to generate green light, and the light source provided with two same color light emitting diodes in this embodiment is intended to solve the problem that the light intensity of a single light source is insufficient and cannot meet the light flux required by the system light source, so as to improve the brightness of the single color light in the system light source. However, in another embodiment, the first light ray G1 and the second light ray G2 may be different colors of light, for example, the first light ray G1 is green light, and the second light ray G2 is blue light or red light. In other embodiments (see fig. 6), the first light ray G1 and the second light ray G2 of different color light can be combined with the third light ray B1 and the fourth light ray B4 of another group of different color light to form the color light required by the system light source. The light combining structure 100A can be used as a system light source in a projector, for example.
Fig. 3 is a schematic diagram of a light combining structure 100B according to another embodiment of the invention. In this embodiment, the light combining structure 100B further includes a third light source 103, besides the first light source 101 and the second light source 102, disposed on one side of the second beam splitter DM2, and the third light source 103 is configured to emit a third light beam B1. The third light ray B1 is different from the first light ray G1 and the second light ray G2 in color, such as blue light, ultraviolet light or other color light. The third light source 103 is mainly used as a light source for exciting a fluorescent body.
As shown in fig. 3, the first beam splitter DM1 allows the third light B1 to partially reflect and partially transmit, and the second beam splitter DM2 allows the third light B1 to transmit. That is, the third light B1 is split into the first sub-beam b1_1 and the second sub-beam b1_2 by the first beam splitter DM1, the first beam splitter DM1 allows the first sub-beam b1_1 to penetrate and exit toward the first light source 101, and the first beam splitter DM1 allows the second sub-beam b1_2 to reflect and exit toward the second light source 102.
The first light source 101 and the second light source 102 each have phosphors P1 and P2, for example, green phosphors or phosphors of other colors. The fluorescent bodies P1 and P2 can be excited by the third light B1 to generate fourth light, and the fourth light can be the same color light as the first light G1 and the second light G2, for example, blue light and ultraviolet light excite the green fluorescent bodies to generate green light which is the same as the first light G1 and the second light G2. Therefore, the third light source 103 is provided in the present embodiment to generate more color light, thereby improving the brightness of the single color light in the system light source. The light combining structure 100B can be used as a system light source in a projector, for example.
Fig. 4 is a schematic diagram of a light combining structure 100C according to another embodiment of the invention. In this embodiment, the light combining structure 100C includes a third beam splitter DM3, a fourth beam splitter DM4, a fourth light source 104 and a fifth light source 105 in addition to the first light source 101, the second light source 102 and the third light source 103 that are selectively disposed. The third beam splitter DM3 and the fourth beam splitter DM4 are disposed on the fourth side E14 of the first beam splitter DM 1. The fourth beam splitter DM4 is disposed substantially in parallel with the first beam splitter DM1, and the third beam splitter DM3 is disposed substantially non-co-directionally (e.g., cross-disposed) with the fourth beam splitter DM4. As shown in fig. 4, the third beam splitter DM3 allows the first light ray G1 from the first light source 101 and the second light ray G2 from the second light source 102 to reflect, and the fourth beam splitter DM4 allows the first light ray G1 from the first light source 101 and the second light ray G2 from the second light source 102 to transmit.
In addition, the fourth light source 104 is disposed on the fifth side E21 of the third beam splitter DM3 for emitting the fourth light B2. The fifth light source 105 is disposed on the sixth side E22 of the third beam splitter DM3 for emitting the fifth light R.
The third beam splitter DM3 allows the fourth light ray B2 to pass therethrough, and the third beam splitter DM3 allows the fifth light ray R to pass therethrough.
The fourth beam splitter DM4 allows the fourth light ray B2 to pass through, and the fourth beam splitter DM4 allows the fifth light ray R to reflect. The third light source 103, the fourth light source 104, and the fifth light source 105 are provided with collimator lenses LS3, LS4, and LS5, respectively, on the light emitting sides, for example.
The first light ray G1 and the second light ray G2 are the same color light, for example, green light. The third light B1 and the fourth light B2 are the same color light, for example, blue light. The fifth light ray R and the first light ray G1 to the fourth light ray B2 are different color lights, for example, red light.
As shown in fig. 4, the first light ray G1 and the second light ray G2 are reflected by the third beam splitter DM3 and become partial color light required by the system light source, the fourth light ray B2 penetrates through the third beam splitter DM3 and the fourth beam splitter DM4 and becomes partial color light required by the system light source, and the fifth light ray R is reflected by the fourth beam splitter DM4 and becomes partial color light required by the system light source. Therefore, the three different colors of light (G1, G2, B2, R) can be combined into the color light required by the system light source through the light combining structure 100C of the present embodiment. The light combining structure 100C can be used as a system light source in a projector, for example.
Fig. 5 is a schematic diagram of a light combining structure 100D according to another embodiment of the invention. In this embodiment, the light combining structure 100D includes a third beam splitter DM3, a fourth beam splitter DM4 and a fourth light source 104 in addition to the first light source 101, the second light source 102 and the third light source 103. The third beam splitter DM3 is disposed on one side of the second beam splitter DM2, and the fourth beam splitter DM4 is disposed on the other side of the second beam splitter DM2. The third beam splitter DM3 is disposed substantially in parallel with the fourth beam splitter DM4, and the third beam splitter DM3 is disposed substantially non-co-directionally (e.g., cross-disposed) with the first beam splitter DM 1. As shown in fig. 5, the third beam splitter DM3 allows the first light ray G1 from the first light source 101 and the second light ray G2 from the second light source 102 to pass through.
In addition, the third light source 103 is disposed on the ninth side E31 of the fourth beam splitter DM4 for emitting the third light B1, and the fourth light source 104 is disposed on the tenth side E32 of the fourth beam splitter DM4 for emitting the fourth light B2. The third beam splitter DM3 allows the third light beam B1 and the fourth light beam B2 to enter the fourth side E14 of the first beam splitter DM1 after being reflected, and the fourth beam splitter DM4 allows the third light beam B1 to be reflected, and the fourth beam splitter DM4 allows the fourth light beam B2 to pass through.
The first light ray G1 and the second light ray G2 are the same color light, for example, green light. The third light ray B1 and the fourth light ray B2 are different color lights, such as blue light and red light, the third light ray B1, the first light ray G1 and the second light ray G2 are different color lights, and the fourth light ray B2, the first light ray G1 and the second light ray G2 are different color lights.
As shown in fig. 5, the first light ray G1 and the second light ray G2 penetrate through the third beam splitter DM3 to become a part of color light required by the system light source, the third light ray B1 penetrates through the second beam splitter DM2 to the third beam splitter DM3 after being reflected by the fourth beam splitter DM4, and then is reflected by the third beam splitter DM3 to become a part of color light required by the system light source. In addition, the fourth light beam B2 passes through the fourth beam splitter DM4 and the second beam splitter DM2, and then is reflected by the third beam splitter DM3 to become a part of color light required by the system light source. Therefore, the three different colors of light (G1, G2, B1, B2) can be combined into the color light required by the system light source through the light combining structure 100D of the present embodiment. The light combining structure 100D can be used as a system light source in a projector, for example.
Fig. 6 is a schematic diagram of a light combining structure 100E according to another embodiment of the invention. In this embodiment, the light combining structure 100E includes a first light combining structure 1001, a second light combining structure 1002, and a light emitting structure 1003 between the first light combining structure 1001 and the second light combining structure 1002, and the light emitting structure 1003 includes a fifth beam splitter DM5 and a sixth beam splitter DM6. The first light combining structure 1001 and the second light combining structure 1002 are arranged in a mirror or bilateral symmetry manner substantially the same as each other. The first light combining structure 1001 includes a first light source 101, a second light source 102, a first beam splitter DM1 and a second beam splitter DM2, and the contents thereof are described in detail in fig. 2, which is not repeated herein. The second light combining structure 1002 includes a third light source 103, a fourth light source 104, a third beam splitter DM3, and a fourth beam splitter DM4. The third light source 103 is disposed on the seventh side E41 of the third beam splitter DM3, and is configured to emit a third light beam B1, and the third light source 103 is provided with a third reflection surface S3. The fourth light source 104 is disposed on the sixth side E42 of the third beam splitter DM3 for emitting the fourth light B2, and the fourth light source 104 is provided with a fourth reflecting surface S4. That is, the third light source 103 and the fourth light source 104 are respectively disposed on the adjacent seventh side E41 and sixth side E42 (or disposed on the opposite seventh side E41 and fifth side E43). The third beam splitter DM3 allows the third light beam B1 and the fourth light beam B2 to partially transmit, and the contents are similar to those of the first beam splitter DM1 in fig. 1A to 1D, and the third beam splitter DM3 and the first beam splitter DM1 are configured in a mirror manner, and detailed descriptions thereof are omitted herein. In other embodiments, the positions of the first light source 101 and the third light source 103 of different colors may be interchanged, and the positions of the second light source 102 and the fourth light source 104 of different colors may be interchanged. Alternatively, the first light source 101, the second light source 102 and the third light source 103 are light sources of the same color light, and the fourth light source 104 is a light source of other color light, so that three times of brightness of color light can be generated, thereby improving the brightness of single color light in the system light source.
The third reflecting surface S3, the fourth reflecting surface S4 and the fourth beam splitter DM4 are similar in purpose, so as to allow the third light beam B1, the fourth light beam B2 and the sub-beam thereof to enter the eighth side E44 of the third beam splitter DM3 after at least one reflection. The fourth beam splitter DM4 is disposed on a fifth side E43 of the third beam splitter DM3, wherein the seventh side E41 is opposite to the fifth side E43, and the sixth side E42 is opposite to the eighth side E44. In an embodiment, the third reflecting surface S3 is substantially disposed on an extension line of the third light beam B1 in the light emitting direction, and the fourth reflecting surface S4 is substantially disposed on an extension line of the fourth light beam B2 in the light emitting direction.
The first light ray G1 and the second light ray G2 are, for example, green light or other color light, the third light ray B1 and the fourth light ray B2 are, for example, red light or other color light, that is, the third light ray B1 and the first light ray G1 and the second light ray G2 are different color light, and the fourth light ray B2 and the first light ray G1 and the second light ray G2 are different color light. In this embodiment, two combined light structures 1001 and 1002 are provided, and each combined light structure 1001 and 1002 includes two light sources of the same color light emitting diode, which is used to solve the problem that the light intensity of a single light source is insufficient and cannot meet the luminous flux required by the system light source, so as to improve the brightness of two different colors of light in the system light source.
Referring to fig. 6, a fifth beam splitter DM5 and a sixth beam splitter DM6 are disposed between the first beam splitter DM1 and the third beam splitter DM3, the fifth beam splitter DM5 is disposed substantially in parallel with the third beam splitter DM3 in the same direction, and the sixth beam splitter DM6 is disposed substantially in parallel with the first beam splitter DM1 in the same direction. The fifth beam splitter DM5 is disposed non-co-directionally (e.g., cross-disposed) with the sixth beam splitter DM6.
In addition, the fifth beam splitter DM5 allows the first light ray G1 and the second light ray G2 to reflect, the sixth beam splitter DM6 allows the first light ray G1 and the second light ray G2 to pass through, the fifth beam splitter DM5 allows the third light ray B1 and the fourth light ray B2 to pass through, the sixth beam splitter DM6 allows the third light ray B1 and the fourth light ray B2 to reflect, and the fifth beam splitter DM5 and the sixth beam splitter DM6 allow the fifth light ray R to pass through. Therefore, the first light ray G1 and the second light ray G2 become the partial color light required by the system light source after being reflected by the fifth beam splitter DM5, and the third light ray B1 and the fourth light ray B2 become the partial color light required by the system light source after being reflected by the sixth beam splitter DM6.
In addition, in fig. 6, the light combining structure 100E may further include a fifth light source 105 disposed on one side of the fifth beam splitter DM5 and the sixth beam splitter DM6 for emitting a fifth light R, such as blue light or other color light, where the fifth light R and the first light G1 to the fourth light B2 may be different color lights. The fifth beam splitter DM5 and the sixth beam splitter DM6 allow the fifth light R to pass through, so that the fifth light R becomes a part of the color light required by the system light source. Therefore, the three different colors of light (G1, G2, B1, B2, R) can be combined into the color light required by the system light source through the light combining structure 100E of the present embodiment. The light combining structure 100E can be used as a system light source in a projector, for example.
As can be seen from the above description, the light combining structure and the projection apparatus according to the above embodiments of the present invention include a first beam splitter, a first light source, a second light source and a second beam splitter; the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface; the second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and the second light source is provided with a second reflecting surface; the second beam splitter is disposed on the third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially reflect and partially penetrate, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to reflect and then enter the fourth side of the first beam splitter. The light combining structure of the embodiment can be applied to a projector or an image output device with high brightness requirement to improve the overall brightness of a system light source so as to solve the problem that the light intensity of a single solid-state light-emitting element is insufficient and the luminous flux required by the light source cannot be met.
Although the present invention has been described in connection with the accompanying drawings, the embodiments disclosed in the drawings are intended to be illustrative of the preferred embodiments of the invention and are not to be construed as limiting the invention. For clarity of description of the components required, the scale in the schematic drawings does not represent the proportional relationship of the actual components.
The invention has been described with respect to the above-described embodiments, however, the above-described embodiments are merely examples of practicing the invention. It should be noted that the disclosed embodiments do not limit the scope of the invention. On the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Claims (21)

1. A light combining structure, comprising:
a first spectroscope;
the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface;
the second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and a second reflecting surface is arranged on the second light source; and
the second beam splitter is arranged on the third side of the first beam splitter, wherein the first beam splitter allows the first light and the second light to partially penetrate through the reflecting part, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to enter the fourth side of the first beam splitter after being reflected.
2. The light combining structure of claim 1, wherein the first side is opposite to the third side and the second side is opposite to the fourth side.
3. The light combining structure of claim 1, further comprising a third light source disposed on one side of the second beam splitter for emitting a third light, the first beam splitter allowing the third light to partially reflect and partially pass through, the second beam splitter allowing the third light to pass through.
4. The light combining structure of claim 3, wherein the first light and the second light are of the same color, and the third light is of different colors.
5. The light combining structure of claim 4, wherein the first light source and the second light source respectively have a fluorescent body, and the fluorescent body is excited by a third light to generate the same color light as the first light and the second light.
6. A light combining structure as recited in claim 3, further comprising:
the third spectroscope is arranged on the fourth side of the first spectroscope;
the fourth spectroscope is arranged on the fourth side of the first spectroscope;
the fourth light source is arranged on the fifth side of the third spectroscope and used for emitting fourth light; and
the fifth light source is arranged on the sixth side of the third spectroscope and used for emitting fifth light;
the third beam splitter allows the first light and the second light to be reflected, the fourth beam splitter allows the first light and the second light to be transmitted, the third beam splitter allows the fourth light to be transmitted, the third beam splitter allows the fifth light to be transmitted, the fourth beam splitter allows the fourth light to be transmitted, and the fourth beam splitter allows the fifth light to be reflected.
7. The light combining structure of claim 6, wherein the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the fifth light is of different colors from the first light, the second light, the third light and the fourth light, respectively.
8. The light combining structure of claim 1, further comprising:
the third spectroscope is arranged at one side of the second spectroscope;
the fourth spectroscope is arranged on the other side of the second spectroscope;
the third light source is arranged on the ninth side of the fourth spectroscope and used for emitting third light rays; and
the fourth light source is arranged on the tenth side of the fourth spectroscope and used for emitting fourth light rays;
the third beam splitter allows the third light and the fourth light to enter the fourth side of the first beam splitter after being reflected, the third beam splitter allows the first light and the second light to penetrate, the fourth beam splitter allows the third light to be reflected, and the fourth beam splitter allows the fourth light to penetrate.
9. The light combining structure of claim 8, wherein the first light and the second light are of the same color, and the third light, the fourth light, and the first light and the second light are of different colors.
10. The light combining structure of claim 1, further comprising:
a third spectroscope;
the third light source is arranged on the seventh side of the third spectroscope and used for emitting third light rays, and the third light source is provided with a third reflecting surface;
the fourth light source is arranged on the sixth side of the third spectroscope and used for emitting fourth light, and the fourth light source is provided with a fourth reflecting surface; and
the fourth spectroscope is arranged on the fifth side of the third spectroscope, wherein the third spectroscope allows the third light ray and the fourth light ray to partially penetrate through the third reflecting surface, the fourth reflecting surface and the fourth spectroscope allow the third light ray and the fourth light ray to enter the fourth side of the third spectroscope after being reflected, the fifth side is opposite to the seventh side, the sixth side is opposite to the eighth side, and the third spectroscope and the first spectroscope are in mirror configuration.
11. The light combining structure of claim 10, wherein the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the third light, the fourth light and the first light and the second light are of different colors.
12. The light combining structure of claim 10, further comprising:
the fifth spectroscope is arranged between the first spectroscope and the third spectroscope;
the sixth spectroscope is arranged between the first spectroscope and the third spectroscope; and
the fifth light source is arranged at one side of the fifth spectroscope and the sixth spectroscope and is used for emitting a fifth light ray;
the fifth spectroscope allows the first light and the second light to reflect, the sixth spectroscope allows the first light and the second light to pass through, the fifth spectroscope allows the third light and the fourth light to pass through, the sixth spectroscope allows the third light and the fourth light to reflect, and the fifth spectroscope and the sixth spectroscope allow the fifth light to pass through.
13. The light combining structure of claim 12, wherein the first light and the second light are of the same color, the third light and the fourth light are of the same color, and the fifth light and the first light to the fourth light are of different colors.
14. The light combining structure of claim 10, wherein a portion of the third light passes through the third beam splitter, then is reflected by the fourth beam splitter, the third reflecting surface and the fourth reflecting surface and passes through the third beam splitter, and then reaches the eighth side of the third beam splitter.
15. The light combining structure of claim 10, wherein a portion of the fourth light is reflected by the third beam splitter, reflected by the fourth beam splitter, the third reflecting surface and the fourth reflecting surface, and then transmitted to the eighth side of the third beam splitter.
16. The light combining structure of claim 1, wherein a portion of the first light passes through the first beam splitter, then is reflected by the second beam splitter, the first reflecting surface and the second reflecting surface and passes through the first beam splitter, and then reaches the fourth side of the first beam splitter.
17. The light combining structure of claim 1, wherein a portion of the second light is reflected by the first beam splitter, reflected by the second beam splitter, the first reflecting surface, and the second reflecting surface, and then transmitted through the first beam splitter to reach the fourth side of the first beam splitter.
18. A light combining structure, comprising:
a first spectroscope;
the first light source is arranged on the first side of the first spectroscope and used for emitting first light rays, and the first light source is provided with a first reflecting surface;
the second light source is arranged on the second side of the first spectroscope and used for emitting second light rays, and a second reflecting surface is arranged on the second light source; and
the second beam splitter is arranged on the third side of the first beam splitter, the first beam splitter allows the first light and the second light to partially penetrate through the reflecting part, and the first reflecting surface, the second reflecting surface and the second beam splitter allow the first light and the second light to enter the fourth side of the first beam splitter after being reflected;
the first light source and the second light source are respectively provided with a fluorescent body, and the fluorescent bodies are excited by the third light to generate fourth light.
19. The light combining structure of claim 18, wherein the fourth light is the same color as the first light and the second light.
20. The light combining structure of claim 18, wherein the third light and the first light and the second light are different colors.
21. A projection device comprising a light combining structure as claimed in any one of claims 1 to 20.
CN202210422632.1A 2022-04-21 2022-04-21 Light combining structure and projection device Pending CN116974131A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210422632.1A CN116974131A (en) 2022-04-21 2022-04-21 Light combining structure and projection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210422632.1A CN116974131A (en) 2022-04-21 2022-04-21 Light combining structure and projection device

Publications (1)

Publication Number Publication Date
CN116974131A true CN116974131A (en) 2023-10-31

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210422632.1A Pending CN116974131A (en) 2022-04-21 2022-04-21 Light combining structure and projection device

Country Status (1)

Country Link
CN (1) CN116974131A (en)

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