CN114460797B - Light source system and projection equipment - Google Patents
Light source system and projection equipment Download PDFInfo
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- CN114460797B CN114460797B CN202011233980.1A CN202011233980A CN114460797B CN 114460797 B CN114460797 B CN 114460797B CN 202011233980 A CN202011233980 A CN 202011233980A CN 114460797 B CN114460797 B CN 114460797B
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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
- G03B21/2073—Polarisers in the lamp house
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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
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Abstract
The invention discloses a light source system and projection equipment. The light source system comprises a first light source, a light combining element, a wavelength conversion element, a first phase delay element and a guide element, wherein the first light source is used for generating first polarized light; the light combining element is used for enabling part of the first polarized light from the first light source to be reflected to obtain second polarized light, part of the first polarized light is transmitted to obtain third polarized light, and the visible light is combined; the wavelength conversion element is used for generating stimulated light under the irradiation of the second polarized light and reflecting the stimulated light to the light element; the third polarized light passes through the first phase delay element and the guiding element in sequence and returns to the light combining element for light combination. The light source system and the projection equipment provided by the invention utilize the polarization characteristic of light, and have the advantages of simple light path, compact structure and smaller volume; and the advantages of the brightness of the laser can be utilized, and the influence of the speckle of the pure laser can be greatly reduced. In addition, the invention adopts a static mode to carry out time-sharing wavelength conversion, thereby reducing noise, volume and cost.
Description
Technical Field
The invention relates to the technical field of display, in particular to a light source system and projection equipment.
Background
In projection display products, projection display light sources are very important components, whose function is to convert light rays of different colors, different angular distributions, different brightnesses and different shapes into uniform light spots that illuminate the active area of the display chip.
In the field of projection display, the conventional bulb is not adopted due to its own defects, and new light sources such as LED, laser phosphor, and three-color laser exhibit excellent characteristics in terms of brightness, color, life, energy consumption, etc., and are becoming the mainstream of light sources for projection display. Among the three new light source technologies, the LED light source is difficult to realize high brightness, and the three laser light sources have speckle puzzles, so that ideal image quality cannot be obtained.
Disclosure of Invention
In view of this, the present invention provides a light source system and a projection apparatus, which mainly use the polarization characteristic of light to perform light splitting and combining, so that the whole light path is compact, the light path space is greatly saved, and the light combining efficiency is improved.
In a first aspect, the present invention provides a light source system, which includes a first light source, a light combining element, a wavelength conversion element, a first phase delay element, and a guiding element, wherein:
the first light source is used for generating first polarized light;
the light combining element is configured to reflect a part of the first polarized light from the first light source to obtain second polarized light, transmit a part of the first polarized light to obtain third polarized light, transmit the laser light reflected by the wavelength conversion element, and reflect the fifth polarized light converted by the first phase retarder, or reflect a part of the first polarized light from the first light source to obtain third polarized light, transmit a part of the first polarized light to obtain second polarized light, reflect the laser light reflected by the wavelength conversion element, and transmit the fifth polarized light converted by the first phase retarder, where polarization directions of the first polarized light, the second polarized light, and the third polarized light are different;
the wavelength conversion element is configured on a transmission path of the second polarized light, and is used for generating the received laser light under the irradiation of the second polarized light and reflecting the received laser light to the light combining element;
the first phase delay element and the guiding element are both arranged on a transmission path of the third polarized light, the first phase delay element is positioned between the light combining element and the guiding element, the third polarized light is converted into fourth polarized light after passing through the first phase delay element, and the fourth polarized light is reflected by the guiding element to the first phase delay element, is converted into fifth polarized light by the first phase delay element and is transmitted to the light combining element.
In a possible implementation manner, the light source system further includes a second phase delay element, the second phase delay element is disposed on a transmission path of the first polarized light and located between the first light source and the light combining element, and the first polarized light from the first light source is converted by the second phase delay element and then enters the light combining element.
In a possible implementation manner, the light source system further includes a second light source, light generated by the second light source passes through the guiding element and the first phase delay element in sequence and is then transmitted to the light combining element, and the light combining element is further configured to combine light generated by the second light source with the excited light and the fifth polarized light.
In a possible implementation manner, the light source system further includes a control unit, and the control unit is configured to control the first light source to move, and adjust a polarization direction of the first polarized light generated by the control unit relative to the light combining element.
In a possible implementation manner, the light source system further includes a control unit, and the control unit is configured to control the second phase retardation element to move, and adjust an angle between an optical axis of the second phase retardation element and a polarization direction of the first polarized light incident to the second phase retardation element.
In one possible implementation, the polarization direction of the second polarized light and the polarization direction of the third polarized light are perpendicular to each other.
In one possible implementation, the polarization directions of the second polarized light and the fifth polarized light are the same.
In one possible implementation, the first light source is a polarized light source, and the first polarized light is linearly polarized or polarized light that is approximately linearly polarized.
In one possible implementation, the first light source is a laser light source.
In one possible implementation, the first phase retardation element is a quarter-wave plate or an optical rotation plate.
In one possible implementation, the second phase delay element is a half-wave plate or an optical rotation plate.
In one possible implementation, the guiding element is a reflecting element.
In a possible implementation, the guiding element is a filter element having the function of reflecting light of the fourth polarization and transmitting light generated by the second light source.
In one possible implementation manner, the light generated by the first light source is blue light, and the excited light is yellow light.
In a possible implementation manner, the light generated by the first light source is blue light, the stimulated light is green light, and the light generated by the second light source is red light.
In a second aspect, the present invention provides another light source system, which includes a first light source, a time-series polarization converter, a light combining element, a wavelength converting element, a first phase delay element, a filter element, and a second light source, wherein:
the first light source is used for generating first polarized light;
the time sequence polarization converter is configured on the transmission path of the first polarized light and is used for converting the first polarized light incident to the time sequence polarization converter into second polarized light or third polarized light in a time sequence mode;
the light combining element is used for reflecting the second polarized light, transmitting the third polarized light, transmitting the stimulated light reflected back by the wavelength conversion element, and reflecting the fifth polarized light converted by the first phase delay element, or reflecting the third polarized light, transmitting the second polarized light, reflecting the stimulated light reflected back by the wavelength conversion element, and transmitting the fifth polarized light converted by the first phase delay element;
the wavelength conversion element is arranged on a transmission path of the second polarized light and used for generating the received laser light under the irradiation of the second polarized light and reflecting the received laser light to the light combining element;
the first phase delay element and the filter element are both arranged on a transmission path of the third polarized light, the first phase delay element is positioned between the light combining element and the filter element, the third polarized light is converted into fourth polarized light after passing through the first phase delay element, and the fourth polarized light is reflected by the filter element to the first phase delay element, is converted into fifth polarized light by the first phase delay element and is transmitted to the light combining element;
the light generated by the second light source passes through the filter element and the first phase delay element in sequence and then is transmitted to the light combining element, and the light combining element is further used for combining the light generated by the second light source with the stimulated light and the fifth polarized light.
In a possible implementation manner, the time-sequence polarization converter is an electrically controlled polarization converter, and the polarization direction of the first polarized light is the same as the polarization direction of the second polarized light or the polarization direction of the third polarized light.
In one possible implementation, the polarization direction of the second polarized light and the polarization direction of the third polarized light are perpendicular to each other.
In one possible implementation, the polarization direction of the second polarized light is the same as the polarization direction of the fifth polarized light.
In one possible implementation, the first light source is a polarized light source, and the first polarized light is linearly polarized or polarized light that is approximately linearly polarized.
In one possible implementation, the first light source is a laser light source.
In one possible implementation, the first phase retardation element is a quarter-wave plate or an optical rotation plate.
In a possible implementation manner, the light generated by the first light source is blue light, the stimulated light is green light, and the light generated by the second light source is red light.
In a third aspect, the present invention provides a projection apparatus, which includes the light source system described in the first aspect and possible implementation manners of the first aspect, or in the second aspect and possible implementation manners of the second aspect.
The light source system and the projection equipment provided by the invention utilize the polarization characteristic of light, and have the advantages of simple light path, compact structure and smaller volume; and the advantages of the brightness of the laser can be utilized, and the influence of the speckle of the pure laser can be greatly reduced. In addition, the invention adopts a static mode to carry out time-sharing wavelength conversion, thereby reducing noise, volume and cost.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail embodiments of the present invention with reference to the attached drawings. The accompanying drawings are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings, like reference numbers generally represent like parts or steps. Wherein:
fig. 1A and 1B are schematic structural diagrams of a light source system according to an embodiment of the invention;
FIG. 2 is a schematic structural diagram of a light source system according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a light source system according to another embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a light source system according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a light source system according to another embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Moreover, while the present disclosure has been described in terms of one or more exemplary embodiments, it is to be understood that each aspect of the disclosure can be implemented as a separate entity, whether or not such embodiment is described in connection with its specific embodiments. The embodiments and features of the embodiments described below can be combined with each other without conflict.
In the embodiments of the present invention, words such as "exemplary", "for example", etc. are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term using examples is intended to present concepts in a concrete fashion.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The term "and/or" includes any and all combinations of one or more of the associated listed items.
In order to thoroughly understand the present invention, a detailed description will be provided below in order to explain the technical solution of the present invention. The following detailed description of the preferred embodiments of the invention, however, the invention is capable of other embodiments in addition to those detailed.
Fig. 1A and 1B are schematic structural diagrams of a light source system according to an embodiment of the invention. As shown in fig. 1A and 1B, the light source system includes a first light source 1, a light combining element 3, a wavelength conversion element 4, a first phase delay element 5, and a guide element 6. The first light source 1 is used for generating first polarized light 101. The light combining element 3 is configured to reflect part of the first polarized light 101 from the first light source 1 to obtain second polarized light 1011 and transmit part of the first polarized light 101 to obtain third polarized light 1012, transmit the laser beam 102 reflected back by the wavelength converter 4, and reflect the fifth polarized light 1013 converted by the first phase retarder 5, or reflect part of the first polarized light 101 from the first light source 1 to obtain third polarized light 1012 and transmit part of the first polarized light 1011 and reflect the laser beam 102 reflected back by the wavelength converter 4, and transmit the fifth polarized light 1013 converted by the first phase retarder 5, wherein the polarization directions of the first polarized light 101, the second polarized light 1011, and the third polarized light 1012 are different. The wavelength conversion element 4 is disposed on the transmission path of the second polarized light 1011, and is used for generating the received laser light 102 under the irradiation of the second polarized light 1011, and reflecting the received laser light 102 back to the optical element 3. The first phase retardation element 5 and the guiding element 6 are both disposed on the transmission path of the third polarized light 1012, the first phase retardation element 5 is located between the light combining element 3 and the guiding element 6, the third polarized light 1012 is converted into the fourth polarized light by the first phase retardation element 5, the fourth polarized light is reflected by the guiding element 6 back to the first phase retardation element 5, and is converted into the fifth polarized light 1013 by the first phase retardation element 5 and is transmitted to the light combining element 3.
The light combining element 3 can combine visible light with polarized light split of light having a specific wavelength. For example, the light combining element 3 can perform polarization splitting only for blue light, and can perform light combining by transmitting or reflecting visible light of other colors.
In a specific embodiment, the first light source 1 is a polarized light source, preferably a laser light source, such as a blue laser light source, which generates the first polarized light 101 as linearly polarized or nearly linearly polarized light. As shown in fig. 1A, the first polarized light 101 enters the light combining element 3, is partially reflected to obtain a second polarized light 1011, and is partially transmitted to obtain a third polarized light 1012. Illustratively, the polarization directions of the second polarized light 1011 and the third polarized light 1012 are perpendicular to each other, for example, the polarization directions of the second polarized light 1011 and the third polarized light 1012 are the P-polarization direction and the S-polarization direction, respectively.
The second polarized light 1011 excites the wavelength conversion element 4, generates the excited light 102 having a specific color, and reflects the excited light to the light combining element 3 to combine the light. The wavelength converting element 4 may be a device having a wavelength converting material, such as phosphor, nanoparticles, etc., formed on the surface thereof. In the present application, the wavelength converting element 4 is a static element, which can reduce noise, volume and cost.
As the usage time increases, the conversion ratio of the wavelength conversion material such as phosphor generally decreases, and in order to maximize the brightness of the combined light, the intensity of the second polarized light 1011 for exciting the wavelength conversion material needs to be increased. By changing the polarization direction of the first polarized light 101, the intensity distribution of the second polarized light 1011 and the third polarized light 1012 can be adjusted, and the specific distribution of the intensities of the second polarized light 1011 and the third polarized light 1012 can be adjusted according to actual needs. For example, the intensity of the first polarized light 101 is 100, the intensities of the second polarized light 1011 and the third polarized light 1012 before the adjustment are 50 and 50, respectively, and the intensities of the second polarized light 1011 and the third polarized light 1012 after the adjustment are 40 and 60, respectively. In some embodiments, a control unit may be arranged to control the first light source 101 to move, so as to adjust the polarization direction of the first polarized light 101 generated by the first light source relative to the light combining element 3. The first light source 101 can also be manually controlled to rotate to a proper position, so that the intensities of the second polarized light 1011 and the third polarized light 1012 meet the requirement.
The third polarized light 1012 sequentially passes through the first phase retardation element 5 and the guiding element 6, and then returns to the light combining element 3 for light combining, that is, the third polarized light 1012 is converted into fourth polarized light by the first phase retardation element 5, the fourth polarized light is reflected by the guiding element 6 back to the first phase retardation element 5, and is converted into fifth polarized light 1013 by the first phase retardation element 5, and the fifth polarized light 1013 is transmitted to the light combining element 3. The first retardation element 5 is preferably a quarter-wave plate, and may be an element having the same function, such as an optical rotation plate; the guiding element 6 is preferably a reflecting element. The third polarized light 1012 passes through the first phase retardation element 5 twice and then is converted into a fifth polarized light 1013, and the fifth polarized light 1013 and the second polarized light 1011 have the same polarization direction, for example, both polarization directions are P polarization directions, and can be reflected by the light combining element 3.
Fig. 2 is a schematic structural diagram of a light source system according to another embodiment of the invention. As shown in fig. 2, the light source system includes a first light source 1, a second phase delay element 2, a light combining element 3, a wavelength conversion element 4, a first phase delay element 5, and a guiding element 6. Compared with the embodiment shown in fig. 1A, the light source system of the embodiment shown in fig. 2 adds the second phase delay element 2, the second phase delay element 2 is disposed on the transmission path of the first polarized light 101 and located between the first light source 1 and the light combining element 3, and the first polarized light 101 from the first light source 1 is converted by the second phase delay element 2 and then enters the light combining element 3. The second phase delay element 2 is preferably a half-wave plate, an optical rotation plate or other element with equivalent function. By changing the polarization direction of the first polarized light 101 by the second phase delay element 2, the intensities of the second polarized light 1011 and the third polarized light 1012 can be adjusted. In some embodiments, a control unit may be configured to control the second phase delay element 2 to move, so as to adjust an angle between the optical axis of the second phase delay element 2 and the polarization direction of the first polarized light 101 incident on the second phase delay element 2, thereby adjusting the polarization direction of the outgoing light from the second phase delay element 2 relative to the light combining element 3. The second phase delay element 2 may also be manually controlled to rotate to a suitable position for the intensity of the light of the second and third polarization 1011, 1012 to be as desired. The remaining elements in the embodiment shown in FIG. 2 are the same as those in the embodiment shown in FIG. 1A, and are not described again here.
In the light source system of the embodiment shown in fig. 1A, 1B and 2, the light combining element 3 combines the received laser light 102 and the fifth polarized light 1013. If white light needs to be synthesized, for example, the first light source 1 is a blue laser light source, the wavelength conversion material of the wavelength conversion element 4 is a yellow light conversion material, and the laser light 102 and the fifth polarized light 1013 are combined by the light combining element 3 to obtain white light.
Fig. 3 is a schematic structural diagram of a light source system according to another embodiment of the present invention. As shown in fig. 3, the light source system includes a first light source 1, a second phase delay element 2, a light combining element 3, a wavelength conversion element 4, a first phase delay element 5, a guiding element 6, and a second light source 7. The second light source 7 may be an LED light source, a laser light source, or another light source, the light 103 generated by the second light source 7 sequentially passes through the guiding element 6 and the first phase delay element 5 and is then transmitted to the light combining element 3, and the light combining element 3 is further configured to combine the light 103 generated by the second light source 7 with the received laser light 102 and the fifth polarized light 1013. If white light needs to be synthesized, for example, the first light source 1 is a blue laser light source, the wavelength conversion material of the wavelength conversion element 4 is a green light conversion material, the second light source 7 is a red light source, and the light 103 generated by the second light source 7, the received laser 102 and the fifth polarized light 1013 are combined by the light combining element 3 to obtain white light. In this embodiment, the guiding element 6 is preferably a filter element having the function of reflecting light of the fourth polarization and transmitting light generated by the second light source, such as a blue-reflecting and red-transmitting filter. The remaining elements in this embodiment are the same as those in the embodiment shown in fig. 2, and are not described again here.
In some embodiments, a collimating system, a converging system, a diffusing element, and the like may be added to the light source system of the above embodiments to improve the utilization rate of light in the light source system, as shown in fig. 4.
Fig. 5 is a schematic structural diagram of a light source system according to another embodiment of the invention. As shown in fig. 5, the light source system includes a first light source 1, a time-series polarization converter 8, a light combining element 3, a wavelength conversion element 4, a first phase delay element 5, a filter element 6, and a second light source 7. With respect to the light source system of the embodiment shown in fig. 3, the second phase delay element 2 is changed to be a time-sequential polarization converter 8, and the time-sequential polarization converter 8 is configured to convert the first polarized light 101 incident on the time-sequential polarization converter 8 into the second polarized light 1011 or the third polarized light 1012 in a time-sequential manner, for example, the first polarized light 101 is converted into the second polarized light 1011 in the first period, the first polarized light 101 is converted into the third polarized light 1012 in the second period, and the first polarized light 101 is converted into the second polarized light 1011 in the third period, so that the cycle is repeated. The light combining element 3 is configured to reflect the second polarized light 1011, transmit the third polarized light 1012, transmit the received laser light 102 reflected back through the wavelength converter 4, and reflect the fifth polarized light 1013 converted by the first phase retarder 5, or reflect the third polarized light 1012, transmit the second polarized light 1011, reflect the received laser light 102 reflected back through the wavelength converter 4, and transmit the fifth polarized light 1013 converted by the first phase retarder 5. The remaining elements in this embodiment are the same as those in the embodiment shown in fig. 3, and are not described again here.
The time-sequential polarization transformer 8 is preferably an electrically controlled polarization transformer, such as a liquid crystal light valve, which controls the polarization direction of the light by being energized or not. For example, assuming that the initial polarization direction of the first polarized light 101 relative to the light combining element 3 is P light, when the electrically controlled polarization converter is not powered on, the first polarized light 101 will keep the P polarization state to exit after passing through the electrically controlled polarization converter; when the electrically controlled polarization converter is powered on, the polarization direction of the first polarized light 101 after passing through the electrically controlled polarization converter is converted from the P polarization state to the S polarization state. Of course, the time-series polarization converter 8 may be another element having the same function. If the first light source 1 is a blue laser light source, the wavelength conversion material of the wavelength conversion element 4 is a green light conversion material, and the second light source 7 is a red light source, the embodiment shown in fig. 5 can realize sequential control of red, green and blue, and can be further applied to a single-optical-machine chip system. The light source system of the embodiment shown in fig. 1A-4 is more suitable for multi-chip systems such as 3DLP, 3LCD and 3 LCOS.
An embodiment of the present invention further provides a projection device, which includes the light source system according to the above embodiment, and the projection device further includes other components, such as a projection lens, and the setting of these components can be referred to in the related art, and is not described herein again.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the former and latter associated objects are in an "or" relationship.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (23)
1. A light source system comprising a first light source, a light combining element, a wavelength converting element, a first phase delay element, and a guiding element, wherein:
the first light source is used for generating first polarized light;
the light combining element is configured to reflect a part of the first polarized light from the first light source to obtain second polarized light, transmit a part of the first polarized light to obtain third polarized light, transmit the laser light reflected by the wavelength conversion element, and reflect the fifth polarized light converted by the first phase retarder, or reflect a part of the first polarized light from the first light source to obtain third polarized light, transmit a part of the first polarized light to obtain second polarized light, reflect the laser light reflected by the wavelength conversion element, and transmit the fifth polarized light converted by the first phase retarder, where polarization directions of the first polarized light, the second polarized light, and the third polarized light are different;
the wavelength conversion element is arranged on a transmission path of the second polarized light and used for generating the received laser light under the irradiation of the second polarized light and reflecting the received laser light to the light combining element;
the first phase delay element and the guiding element are both arranged on a transmission path of the third polarized light, the first phase delay element is positioned between the light combining element and the guiding element, the third polarized light is converted into fourth polarized light through the first phase delay element, the fourth polarized light is reflected back to the first phase delay element by the guiding element, is converted into fifth polarized light through the first phase delay element, and is transmitted to the light combining element;
the light source system further includes a second light source, light generated by the second light source passes through the guiding element and the first phase delay element in sequence and is then transmitted to the light combining element, and the light combining element is further configured to combine light generated by the second light source with the excited light and the fifth polarized light.
2. The light source system of claim 1, further comprising a second phase delay element disposed on a transmission path of the first polarized light and located between the first light source and the light combining element, wherein the first polarized light from the first light source is converted by the second phase delay element and then enters the light combining element.
3. The light source system according to claim 1, further comprising a control unit, wherein the control unit is configured to control the first light source to move, and adjust a polarization direction of the first polarized light generated by the first light source relative to the light combining element.
4. A light source system according to claim 2, further comprising a control unit, wherein the control unit is configured to control the second phase retardation element to move, and adjust an angle between an optical axis of the second phase retardation element and a polarization direction of the first polarized light incident on the second phase retardation element.
5. A light source system according to any one of claims 1-4, wherein the polarization direction of the second polarized light and the polarization direction of the third polarized light are perpendicular to each other.
6. A light source system according to any one of claims 1-4, wherein the polarization directions of the second polarized light and the fifth polarized light are the same.
7. A light source system according to any one of claims 1-4, wherein said first light source is a polarized light source and said first polarized light is linearly polarized or approximately linearly polarized.
8. The light source system of claim 7, wherein the first light source is a laser light source.
9. A light source system according to claim 1, wherein said first phase retardation element is a quarter wave plate or an optical rotation plate.
10. A light source system according to claim 2, wherein said second phase retardation element is a half-wave plate or an optical rotation plate.
11. A light source system according to claim 1 or 2, wherein said directing element is a reflecting element.
12. A light source system according to claim 1, wherein the guiding element is a filter element having a function of reflecting light of the fourth polarization and transmitting light generated by the second light source.
13. A light source system according to claim 1 or 2, wherein the light generated by the first light source is blue light and the excited light is yellow light.
14. The light source system of claim 1, wherein the first light source generates blue light, the stimulated light is green light, and the second light source generates red light.
15. A light source system, comprising a first light source, a time-sequential polarization converter, a light combining element, a wavelength conversion element, a first phase delay element, a filter element, and a second light source, wherein:
the first light source is used for generating first polarized light;
the time sequence polarization converter is configured on the transmission path of the first polarized light and is used for converting the first polarized light incident to the time sequence polarization converter into second polarized light or third polarized light in a time sequence mode;
the light combining element is used for reflecting the second polarized light, transmitting the third polarized light, transmitting the stimulated light reflected back by the wavelength conversion element, and reflecting the fifth polarized light converted by the first phase delay element, or reflecting the third polarized light, transmitting the second polarized light, reflecting the stimulated light reflected back by the wavelength conversion element, and transmitting the fifth polarized light converted by the first phase delay element;
the wavelength conversion element is arranged on a transmission path of the second polarized light and used for generating the received laser light under the irradiation of the second polarized light and reflecting the received laser light to the light combining element;
the first phase delay element and the filter element are both arranged on a transmission path of the third polarized light, the first phase delay element is positioned between the light combining element and the filter element, the third polarized light is converted into fourth polarized light after passing through the first phase delay element, and the fourth polarized light is reflected by the filter element to the first phase delay element, is converted into fifth polarized light by the first phase delay element and is transmitted to the light combining element;
the light generated by the second light source passes through the filter element and the first phase delay element in sequence and then is transmitted to the light combining element, and the light combining element is further used for combining the light generated by the second light source with the stimulated light and the fifth polarized light.
16. The light source system of claim 15, wherein the time-sequential polarization converter is an electrically controlled polarization converter, and the polarization direction of the first polarized light is the same as the polarization direction of the second polarized light or the polarization direction of the third polarized light.
17. A light source system according to any one of claims 15-16, wherein the polarization direction of the second polarized light and the polarization direction of the third polarized light are perpendicular to each other.
18. A light source system according to any one of claims 15-16, wherein the polarization direction of said second polarized light and the polarization direction of said fifth polarized light are the same.
19. A light source system according to any one of claims 15-16 wherein the first light source is a polarized light source and the first polarized light is linearly polarized or approximately linearly polarized.
20. A light source system according to claim 19, wherein said first light source is a laser light source.
21. A light source system according to any one of claims 15-16, wherein the first retardation element is a quarter-wave plate or an optical rotation plate.
22. A light source system according to any one of claims 15 to 16, wherein the light generated by said first light source is blue, the stimulated light is green, and the light generated by said second light source is red.
23. A projection device, characterized in that the projection device comprises a light source system as claimed in any one of claims 1 to 22.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011233980.1A CN114460797B (en) | 2020-11-07 | 2020-11-07 | Light source system and projection equipment |
| PCT/CN2021/106531 WO2022095504A1 (en) | 2020-11-07 | 2021-07-15 | Light source system and projection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011233980.1A CN114460797B (en) | 2020-11-07 | 2020-11-07 | Light source system and projection equipment |
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| CN114460797A CN114460797A (en) | 2022-05-10 |
| CN114460797B true CN114460797B (en) | 2023-02-24 |
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| CN115542649B (en) * | 2022-11-24 | 2023-04-07 | 滁州市大眼橙数字科技有限公司 | Projection lighting source device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188709A (en) * | 2018-09-18 | 2019-01-11 | 无锡视美乐激光显示科技有限公司 | A kind of polarized light conversion device and light-source system |
| CN111736415A (en) * | 2020-07-15 | 2020-10-02 | 成都极米科技股份有限公司 | Mixed light source device and projection display equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP5987368B2 (en) * | 2011-07-05 | 2016-09-07 | 株式会社リコー | Illumination device and projection device |
| CN103207507B (en) * | 2012-01-11 | 2015-07-08 | 中强光电股份有限公司 | Light source module and projector |
| TWI483000B (en) * | 2012-02-22 | 2015-05-01 | Delta Electronics Inc | Polarization converter and projector apparatus comprising the same |
| CN107402494A (en) * | 2016-05-19 | 2017-11-28 | 深圳市光峰光电技术有限公司 | A kind of light-source system and its projector equipment, lighting device |
| US11275253B2 (en) * | 2019-03-20 | 2022-03-15 | Hisense Laser Display Co., Ltd. | Laser projector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109188709A (en) * | 2018-09-18 | 2019-01-11 | 无锡视美乐激光显示科技有限公司 | A kind of polarized light conversion device and light-source system |
| CN111736415A (en) * | 2020-07-15 | 2020-10-02 | 成都极米科技股份有限公司 | Mixed light source device and projection display equipment |
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| WO2022095504A1 (en) | 2022-05-12 |
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