Light source system and laser projection equipment

Abstract

The invention provides a light source system and laser projection equipment, the light source system comprises at least one laser, the laser comprises a first light emitting unit used for emitting a first kind of laser and a second light emitting unit used for emitting a second kind of laser, and the first kind of laser and the second kind of laser have different wavelengths; the light combining assembly comprises a first light combining part, the first light combining part is located on the light emitting side of at least one laser, so that the optical paths of laser beams of the first type of laser and the second type of laser passing through the first light combining part are different, and emergent light beams of the lasers passing through the first light combining part are combined; and the light uniformizing assembly is used for uniformizing the combined laser beams. The device has the advantages of good speckle dissipation effect, compact structure and good dodging effect.

Description

Technical Field

[0001] The present invention relates to the field of laser projection technology, and in particular to a light source system and laser projection equipment. Background Art

[0002] With the continuous development of science and technology, projection display systems are increasingly used in people's work and daily lives. Laser projection, with its advantages such as wide color gamut, high brightness, and long life, is gradually gaining market share. Laser projection equipment is increasingly used in people's work and daily lives. Currently, laser projection equipment mainly consists of a light source system, an optical mechanical system, and a lens.

[0003] Currently, a light source system typically consists of a light combining component, a light homogenizing component, and two lasers. The lasers can simultaneously emit green, blue, and red lasers. The light combining component directs the laser light from the two lasers to the light homogenizing component, which then homogenizes the laser light from the light combining component and directs it to the optomechanical system. The optomechanical system modulates the laser light emitted from the light homogenizing component, which then directs it toward the lens, where it is projected to form the projection image.

[0004] However, due to reasons such as the arrangement of the lasers, the two laser spots are too far apart after being combined, resulting in unsatisfactory combining effects and poor combining uniformity. Summary of the Invention

[0005] The main purpose of the present invention is to provide a light source system and a laser projection device, which have a good speckle elimination effect, a compact structure, and a good light uniforming effect.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a light source system, comprising:

[0007] at least one laser, the laser comprising a first light emitting unit for emitting a first type of laser light, and a second light emitting unit for emitting a second type of laser light, the first type of laser light and the second type of laser light having different wavelengths;

[0008] A light combining assembly, the light combining assembly including a first light combining element, the first light combining element being located on the light output side of at least one laser, such that the optical paths of the laser beams of the first type laser and the second type laser passing through the first light combining element are different, and the output light beams of the laser beams after passing through the first light combining element are combined;

[0009] The light homogenizing component is used to homogenize the laser beam after the combined light.

[0010] The beneficial effect of the present invention is: through the above-mentioned setting, that is, because the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the laser changes differently after passing through the first light combining component, thereby resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the laser can be better homogenized by the light homogenizing component, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system is better.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] In some optional embodiments, the first light combining component has at least two transmission areas with different coatings, each transmission area transmits one of the first type of laser and the second type of laser respectively, the first light-emitting unit of one of the two lasers and the second light-emitting unit of the other are both emitted from the same transmission area, and the output light beams of the two lasers after passing through the first light combining component are combined.

[0013] In some optional embodiments, the first light combining element includes a first transmission area and a second transmission area, the first transmission area is used to transmit the first type of laser and reflect the second type of laser, and the second transmission area is used to transmit the second type of laser and reflect the first type of laser.

[0014] In some optional embodiments, the light combining component further includes a second light combining component, the first light combining component is located on the light output side of at least part of the lasers, so that the optical paths of at least part of the laser beams in the first type of laser and the second type of laser passing through the first light combining component are different, and the second light combining component is located on the light output side of another part of the lasers, and the output light beams of the lasers after passing through the first light combining component and the second light combining component are combined.

[0015] In some optional embodiments, two lasers are arranged in parallel, wherein the first light-emitting unit and the second light-emitting unit of one laser are combined by a first light-combining component, and the first light-emitting unit and the second light-emitting unit of the other laser are combined by two second light-combining components respectively.

[0016] In some optional embodiments, the relative positions of the two second light combining elements respectively match the positions of different transmission areas of the first light combining element.

[0017] In some optional embodiments, the light combining assembly further includes a light combining prism, which is located on the light emitting side of the first light combining component and is used to combine the laser beams passing through the first light combining component.

[0018] In some optional embodiments, the light homogenizing component includes a diffuser, a focusing lens, and a light guide. The diffuser is located on the light-emitting side of the light-combining prism to homogenize the laser beam from the light-combining prism. The focusing lens is located between the diffuser and the light guide to converge the homogenized laser beam.

[0019] In some optional embodiments, the light emission directions of the two lasers have an angle, and the first light combining element is located at the intersection of the emission light paths of the two lasers.

[0020] In a second aspect, the present invention further provides a laser projection device, comprising:

[0021] A light source system, which is the aforementioned light source system and is used to provide a laser beam to the optical machine lighting system;

[0022] The optomechanical lighting system is used to modulate the laser beam provided by the light source system into an image beam and then emit it to the imaging system;

[0023] The imaging system is used to form an image beam and then emit it to the projection screen.

[0024] The present invention provides a light source system and a laser projection device, wherein the laser projection device comprises: a light source system, which is the above-mentioned light source system, and is used to provide a laser beam to the optical mechanical lighting system; an optical mechanical lighting system, which is used to modulate the laser beam provided by the light source system into an image beam and then emit it to the imaging system; an imaging system, which is used to image the image beam and then emit it to the projection screen. The light source system comprises: at least one laser, the laser comprises a first light-emitting unit for emitting a first type of laser, and a second light-emitting unit for emitting a second type of laser, the first type of laser and the second type of laser having different wavelengths; a light combining component, the light combining component comprises a first light combining part, the first light combining part is located on the light output side of at least one laser, so that the optical paths of the laser beams of the first type of laser and the second type of laser passing through the first light combining part are different, and the output beams of the lasers after passing through the first light combining part are combined; and a light homogenizing component, the light homogenizing component is used to homogenize the laser beams after the combination.

[0025] Through the above-mentioned setting, that is, since the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the two lasers changes differently after passing through the first light combining component, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the laser can be better homogenized by the light homogenizing component, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0027] Figure 1 A schematic structural diagram of a first light source system provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of a laser in a light source system provided in an embodiment of the present application;

[0029] Figure 3 A schematic diagram of the assembly of the laser and the first light combining component in the light source system provided in an embodiment of the present application;

[0030] Figure 4 Schematic diagram of the assembly of the laser, the first light combining component, and the second light combining component in the light source system provided in an embodiment of the present application;

[0031] Figure 5 A schematic structural diagram of a third light source system provided in an embodiment of the present application;

[0032] Figure 6 A schematic structural diagram of a fourth light source system provided in an embodiment of the present application;

[0033] Figure 7 This is a light spot diagram before light combination in the light source system provided in an embodiment of the present application;

[0034] Figure 8 A light spot diagram of the light source system provided in an embodiment of the present application after light is combined by the first light combining element;

[0035] Figure 9This is a light spot diagram of the light source system provided in an embodiment of the present application after light is combined by the first light combining component and the light combining prism;

[0036] Figure 10 This is a schematic structural diagram of the second light source system provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 100-light source system;

[0039] 110-Laser;

[0040] 111-first light-emitting unit;

[0041] 112- second light emitting unit;

[0042] 113-first laser;

[0043] 114-second laser;

[0044] 120-light combining component;

[0045] 121-first light combining element;

[0046] 1211-first transmission area;

[0047] 1212 - second transmission area;

[0048] 122-light combining prism;

[0049] 123-second light combining component;

[0050] 130-light homogenization component;

[0051] 131-diffuser;

[0052] 132-focusing lens;

[0053] 133-light pipe;

[0054] 134-Compound eyes. DETAILED DESCRIPTION

[0055] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention. All other embodiments obtained are within the scope of protection of the present invention. The following embodiments and features in the embodiments may be combined with each other unless there is a conflict.

[0056] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0057] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0058] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0059] Currently, a light source system typically consists of a light combining component, a light homogenizing component, and two lasers. The lasers can simultaneously emit green, blue, and red lasers. The light combining component directs the lasers from the two lasers to the light homogenizing component, which then homogenizes and directs the lasers from the light combining component to the optomechanical system. The optomechanical system modulates the laser light emitted from the light homogenizing component, which then fires the modulated laser light toward the lens, where it is projected to form a projection image. However, due to the arrangement of the lasers and other factors, the two laser beams are separated by a large distance after combining, resulting in unsatisfactory light combining and poor light uniformity.

[0060] In order to overcome the defects in the prior art, the light source system and laser projection equipment provided by the present invention are arranged as above, that is, since the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the two lasers changes differently after passing through the first light combining component, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the light homogenizing component can better homogenize the laser, thereby ensuring that the display effect of the projection picture projected by the laser projection equipment equipped with such a light source system is better.

[0061] The content of the present invention will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the content of the present invention more clearly and in detail.

[0062] Figure 1 This is a schematic structural diagram of the first light source system provided in an embodiment of the present application. Figure 2 This is a schematic diagram of the structure of the laser in the light source system provided in an embodiment of the present application. Figure 3 This is a schematic diagram of the assembly of the laser and the first light combining component in the light source system provided in an embodiment of the present application. Figure 4 This is a schematic diagram of the assembly of the laser, the first light combining component, and the second light combining component in the light source system provided in an embodiment of the present application.

[0063] like Figures 1 to 4 As shown, an embodiment of the present application provides a light source system 100, including:

[0064] at least one laser 110, the laser 110 comprising a first light emitting unit 111 for emitting a first type of laser light, and a second light emitting unit 112 for emitting a second type of laser light, the first type of laser light and the second type of laser light having different wavelengths;

[0065] It can be understood that the first light emitting units 111 of the first type of laser may be in at least two rows, and the second light emitting units 112 of the second type of laser may be in at least two rows.

[0066] Each light emitting unit in the first light emitting unit 111 of the first type laser can emit red laser light. Some light emitting units in the second light emitting unit 112 of the second type laser can emit blue laser light, and the other part can emit green laser light.

[0067] It should be noted that the at least one laser 110 is a three-color laser 110 , wherein the laser 110 can emit red laser, blue laser and green laser.

[0068] The light combining assembly 120 includes a first light combining element 121. The first light combining element 121 is located on the light output side of at least one laser 110 so that the optical paths of the laser beams of the first type laser and the second type laser passing through the first light combining element 121 are different. The output light beams of the laser 110 after passing through the first light combining element 121 are combined.

[0069] In addition, it should be noted that, in order to achieve light merging, the first light combining element 121 may be made of a birefringent material or a composite material. Such a material has special optical properties and can combine light of different colors in a certain proportion.

[0070] The first light emitting unit 111 of the first type laser of one of the two lasers 110 and the second light emitting unit 112 of the second type laser of the other of the two lasers 110 both emit light through the same transmission area of ​​the two transmission areas with different coatings.

[0071] Accordingly, the second light emitting unit 112 of the second type laser of one of the two lasers 110 and the first light emitting unit 111 of the first type laser of the other of the two lasers 110 both emit light through the same transmission area of ​​the other of the two transmission areas with different coatings.

[0072] The light homogenizing component 130 is used to homogenize the laser beam after the combined light.

[0073] It should be noted that the light paths of the first light-emitting unit 111 and the second light-emitting unit 112 of the two lasers 110 are changed by the first light-combining component 121, and after light is combined, the light spot is adjusted by the light homogenizing component 130, which has a simple and compact structure and good light homogenizing effect.

[0074] Through the above-mentioned setting, that is, since the first light combining component 121 can adjust the phase of the laser emitted from the laser 110, the phase difference of the same color light of the two lasers 110 changes differently after passing through the first light combining component 121, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers 110 interfere with each other to a lower degree in the subsequent light path in the light source system 100, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component 120 guides the laser adjusted by the first light combining component 121 to the light homogenizing component 130, the light homogenizing component 130 can better homogenize the laser, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system 100 is better.

[0075] It should be noted that the thickness of the first light combining component 121 is H, and the material is birefringent crystal. The thickness will affect the phase of the laser 110. Only the first laser 113 is analyzed. The phase of the three colors of laser will change by √2*2π / λ*(no-ne)H after passing through the device; for the analysis of the second laser 114, the phase of the three colors of laser will change by 2√2*2π / λ*(no-ne)H; the thickness of the first light combining component 121 can be adjusted to control the phase difference of the fast and slow axis light vectors of the two lasers 110. The phase difference of the same color light of the two lasers 110 changes differently after passing through the first light combining component 121, resulting in different polarization states of the outgoing light beams, so it has a better speckle elimination effect. The phase of the initial light can be changed by controlling the thickness of the first light combining component 121, so the first light combining component 121 also takes into account the role of a wave plate.

[0076] In some optional embodiments, the first light combining element 121 includes a first transmission area 1211 and a second transmission area 1212, wherein the first transmission area 1211 is used to transmit the first type of laser and reflect the second type of laser, and the second transmission area 1212 is used to transmit the second type of laser and reflect the first type of laser.

[0077] It should be noted that the first transmission area 1211 is used to transmit the red laser beam and reflect the blue laser beam and the green laser beam, and the second transmission area 1212 is used to transmit the blue laser beam and the green laser beam and reflect the red laser beam.

[0078] Specifically, the first transmission area 1211 is used to transmit the red laser in the first light-emitting unit 111 of the first type of laser, and reflect the blue laser and green laser in the first light-emitting unit 111 of the second type of laser. The second transmission area 1212 is used to transmit the blue laser and green laser in the first light-emitting unit 111 of the second type of laser, and reflect the red laser in the first light-emitting unit 111 of the first type of laser.

[0079] In some optional embodiments, the first light combining element 121 has at least two transmission areas with different coatings, each transmission area transmits one of the first type of laser and the second type of laser respectively, and the first light-emitting unit 111 of one of the two lasers 110 and the second light-emitting unit 112 of the other are emitted from the same transmission area, and the output light beams of the two lasers 110 after passing through the first light combining element 121 are combined;

[0080] It should be noted that the first light combining element 121 has two transmission areas with different coatings, and each transmission area transmits the first type of laser or the second type of laser respectively.

[0081] In some optional embodiments, the first transmission area 1211 is located above the second transmission area 1212;

[0082] The first transmission area 1211 is away from the first light emitting unit 111 of one of the two lasers 110 and faces the first light emitting unit 111 of the other of the two lasers 110, and the second transmission area 1212 is away from the second light emitting unit 112 of one of the two lasers 110 and faces the second light emitting unit 112 of the other of the two lasers 110.

[0083] It should be noted that, for ease of understanding, the two lasers 110 include a first laser 113 and a second laser 114 .

[0084] The first transmission area 1211 is away from the first light emitting unit 111 of the first laser 113 and faces and is close to the first light emitting unit 111 of the second laser 114 .

[0085] That is, the first transmission area 1211 that transmits the red laser in the first light-emitting unit 111 of the first type of laser and reflects the blue laser and the green laser in the first light-emitting unit 111 of the second type of laser is away from the red laser of the first laser 113 and faces and is close to the red laser of the second laser 114.

[0086] Furthermore, the red laser light of the second laser 114 is transmitted through the first transmission area 1211 and is transmitted to the light homogenizing component 130 .

[0087] It should be noted that the second transmission area 1212 is away from the second light emitting unit 112 of the first laser 113 and faces and is close to the second light emitting unit 112 of the second laser 114 .

[0088] That is, the blue laser and the green laser in the first light-emitting unit 111 that transmits the second type of laser, the second transmission area 1212 of the first light-emitting unit 111 that reflects the red laser in the first type of laser, is away from the blue laser and the green laser of the first laser 113, and faces and is close to the blue laser and the green laser of the second laser 114.

[0089] Furthermore, the blue laser and the green laser of the second laser 114 are transmitted through the second transmission area 1212 and are transmitted to the light homogenizing component 130 .

[0090] It should be noted that the first transmission area 1211 reflects the blue laser and green laser of the first laser 113 and transmits the red laser of the second laser 114 , and the second transmission area 1212 reflects the red laser of the first laser 113 and transmits the blue laser and green laser of the second laser 114 .

[0091] Figure 5 This is a schematic structural diagram of the third light source system provided in an embodiment of the present application. Figure 6This is a schematic structural diagram of the fourth light source system provided in an embodiment of the present application.

[0092] like Figures 4 to 6 As shown, in some optional embodiments, the light combining assembly 120 further includes a second light combining member 123, for details, see Figure 4 The first light combining component 121 is located on the light emitting side of at least part of the laser 110, so that the optical paths of at least part of the laser beams in the first type of laser and the second type of laser passing through the first light combining component 121 are different. The second light combining component 123 is located on the light emitting side of another part of the laser 110, and the output light beams of the laser 110 after passing through the first light combining component 121 and the second light combining component 123 are combined.

[0093] In some optional embodiments, two lasers 110 are arranged in parallel, wherein the first light-emitting unit 111 and the second light-emitting unit 112 of one laser 110 are combined through a first light-combining component 121, and the first light-emitting unit 111 and the second light-emitting unit 112 of the other laser 110 are combined through two second light-combining components 123 respectively.

[0094] In the embodiment of the present application, since there are two lasers 110, the relative positions of the lasers 110 and the light combining assembly 120 can be in various situations, and the structure and number of the light combining assembly 120 can also be implemented in various ways. Here, the embodiment of the present application is schematically described:

[0095] In the first possible implementation, Figure 5 and Figure 6 As shown, when the two lasers 110 in the light source system 100 are arranged sequentially along the target direction X, and the light-emitting sides of the first laser 113 and the second laser 114 are facing the same side, the number of light-combining components 120 in the light source system 100 is two, and these two light-combining components 120 correspond one-to-one to the first laser 113 and the second laser 114, and each light-combining component 120 can be located on the light-emitting side of the corresponding laser 110.

[0096] It should be noted that the two second light combining elements 123 can cover the first laser 113 or the second laser 114 . For the sake of illustration, the embodiment of the present application is described as follows: the two second light combining elements 123 can cover the second laser 114 .

[0097] On the other hand, the first laser 113 combines light using the first light combining element 121 .

[0098] In some embodiments, the light combining assembly 120 may include: two second light combining components 123 arranged in sequence along the target direction X, wherein one of the two second light combining components 123 can cover the first light emitting unit 111 in the second laser 114, and the other of the two second light combining components 123 can cover the first light emitting unit 111 in the second laser 114.

[0099] In this way, the first light-emitting unit 111 in the second laser 114 can emit red laser light to the second light-combining component 123, and the second light-combining component 123 can reflect the red laser light toward the light-homogenizing component 130. The second light-emitting unit 112 in the second laser 114 can emit blue laser light and green laser light to the second light-combining component 123, and the second light-combining component 123 can reflect the blue laser light and green laser light toward the light-homogenizing component 130.

[0100] In addition, the blue laser and the green laser of the first laser 113 are reflected to the light homogenizing assembly 130 through the first transmission area 1211 , and the red laser of the first laser 113 is reflected to the light homogenizing assembly 130 through the second transmission area 1212 .

[0101] For example, the two second light combining elements 123 in the light combining assembly 120 may be second light combining elements 123 for reflecting light of all colors.

[0102] In addition, if Figure 5 As shown, the first laser 113 is close to the light homogenizing component 130 , and the second laser 114 is far away from the light homogenizing component 130 .

[0103] like Figure 6 As shown, the second laser 114 is close to the light homogenizing component 130 , and the first laser 113 is far away from the light homogenizing component 130 .

[0104] In some optional embodiments, the relative positions of the two second light combining elements 123 respectively match the positions of different transmission areas of the first light combining element 121 .

[0105] It should be noted that, in this way, through the mutual cooperation of the two second light combining components 123, the laser emitted by the second laser 114 can be simultaneously converged on the light homogenizing component 130. At the same time, the laser emitted by the first laser 113 can be simultaneously converged on the light homogenizing component 130 through the first light combining component 121. The combined light can be adjusted by the light combining prism 122 to make the light spot more uniform.

[0106] Figure 7 This is the light spot diagram before light combination in the light source system provided in the embodiment of the present application. Figure 8 This is a light spot diagram of the light source system provided in an embodiment of the present application after light is combined by the first light combining element. Figure 9This is a light spot diagram of the light source system provided in an embodiment of the present application after light is combined by the first light combining component and the light combining prism.

[0107] like Figures 1 to 9 As shown, in some optional embodiments, the light combining assembly 120 further includes a light combining prism 122 , which is located on the light emitting side of the first light combining component 121 , and is used to combine the laser beams passing through the first light combining component 121 .

[0108] It should be noted that the combined light can be adjusted by the light combining prism 122 to make the light spot more uniform. The light combining prism 122 can adjust the direction and intensity of the light as needed to achieve the desired light spot effect.

[0109] In general, by using two three-color lasers 110, that is, the first laser 113 and the second laser 114 to combine light, combined with the adjustment of the first light combining component 121 and the light combining prism 122 made of birefringent material or composite material, a simple and compact structure and good light uniforming effect can be achieved.

[0110] It should be noted that, for example, Figure 8 and Figure 9 As shown, they are respectively the light spot diagram after the first light combining component 121 combines the light and the light spot diagram after the light is combined by the first light combining component 121 and the light combining prism 122.

[0111] It should be noted that the second light emitting unit 112 of the first laser 113 and the second laser 114 includes: two consecutive light emitting units for emitting blue light, and three consecutively arranged green light emitting units.

[0112] Specifically, before being adjusted by the light-combining prism 122, the laser light emitted by the second light-emitting unit 112 is distributed in the order of blue-blue-green-green-green. After being adjusted by the light-combining prism 122, the adjusted laser light can be distributed in the order of blue-green-green-green-blue. In this way, by adjusting the laser light after the first light-combining element 121 combines the light through the light-combining prism 122, the problem of the blue laser light and the green laser light emitted by the first laser 113 and the second laser 114 being relatively independent can be effectively avoided.

[0113] The second light emitting unit 112 of the first laser 113 and the second laser 114 includes two light emitting units for emitting blue light and three light emitting units for emitting green light. The first light emitting unit 111 of the first laser 113 and the second laser 114 includes four light emitting units for emitting red light.

[0114] In this case, please refer to Figure 9After the lasers emitted by the first light-emitting unit 111 and the second light-emitting unit 112 are simultaneously adjusted by the light-combining prism 122, and these adjusted lasers are guided to the light-homogenizing component 130 by the light-combining component 120, lasers of various colors can be evenly distributed, and finally the light spot after the lasers are mixed is relatively uniform, thereby ensuring that the quality of the laser beam provided by the light source system 100 is high.

[0115] It should be noted that the light combining assembly 120 in the light source system 100 can be used to direct the laser light adjusted by the first light combining component 121 and the light combining prism 122 to the light homogenizing assembly 130. Here, because the light combining prism 122 can adjust the laser light emitted from the first laser 113 and the second laser 114, the green laser light and the blue laser light emitted by the first laser 113 and the second laser 114 can be evenly distributed, and the green laser light and the blue laser light can be mixed before being emitted to the light combining assembly 120.

[0116] Therefore, after the light combining component 120 directs the laser light adjusted by the light combining prism 122 to the light homogenizing component 130, the laser light can be better homogenized by the light homogenizing component 130, so that the light homogenizing component 130 has a better homogenizing effect on the laser light emitted by the first laser 113 and the second laser 114, thereby ensuring that the display effect of the projection image projected by the laser projection equipment equipped with this light source system 100 is better.

[0117] like Figures 1 to 9 As shown, in some optional embodiments, the light homogenizing component 130 includes a diffuser 131, a focusing lens 132 and a light pipe 133. The diffuser 131 is located on the light-emitting side of the light-combining prism 122 to homogenize the laser beam from the light-combining prism 122. The focusing lens 132 is located between the diffuser 131 and the light pipe 133 to converge the homogenized laser beam.

[0118] It should be noted that the diffuser 131 is closer to the light combining assembly 120 than the focusing lens 132 and the light pipe 133. The diffuser 131 can initially homogenize the laser beam from the light combining assembly 120 and guide the initially homogenized laser beam to the focusing lens 132. The focusing lens 132 can be located between the diffuser 131 and the light pipe 133. The focusing lens 132 can converge the laser beam initially homogenized by the diffuser 131 and guide the converged laser beam to the light pipe 133 in the light homogenizing assembly 130. The laser beam further homogenized by the light pipe 133 is finally homogenized, resulting in a better homogenization effect for the laser beam.

[0119] Figure 10 This is a structural diagram of the second light source system provided in the embodiment of the present application. In addition, Figure 10As shown, it should be noted that this solution can also be used in the compound eye 134 lighting system, using the compound eye 134 instead of the light guide 133 to uniformly distribute light, which is then incident on the optical machine lighting system.

[0120] It should be noted that when the light homogenizing assembly 130 includes a fly-eye lens 134, the laser beam emitted from the light combining assembly 120 can be directly emitted to the fly-eye lens 134. The fly-eye lens 134 can homogenize the laser beams emitted by each laser unit.

[0121] like Figures 1 to 10 As shown, in some optional embodiments, the light emission directions of the two lasers 110 have an angle, and the first light combining element 121 is located at the intersection of the emission light paths of the two lasers 110 .

[0122] In some embodiments, the first laser 113 and the second laser 114 are L-shaped.

[0123] It should be noted that light combining of multiple colors can be achieved by combining two three-color first lasers 113 and second lasers 114. This L-shaped arrangement can make the light combining device more compact and suitable for use in spaces with limited space.

[0124] In addition, it should be noted that the L-shaped arrangement can maximize the use of space and reduce the spacing between devices. By placing the input and output ports of the light-combining component 120 on the two sides of the L-shape, the transmission path of the optical signal inside the light-combining component 120 can be shortened, reducing the loss of the optical signal. In addition, the L-shaped arrangement can also conveniently connect the light-combining devices in multiple light-combining components 120 to form a more complex optical path network. Therefore, arranging in an L-shape can make the light source system 100 more compact and efficient while maintaining optical performance.

[0125] The light source system provided in an embodiment of the present application includes: at least one laser, the laser including a first light-emitting unit for emitting a first type of laser, and a second light-emitting unit for emitting a second type of laser, the first type of laser and the second type of laser having different wavelengths; a light combining component, the light combining component including a first light combining part, the first light combining part being located on the light output side of the two lasers so that the optical paths of the laser beams in the first type of laser and the second type of laser passing through the first light combining part are different, and the output light beams of the lasers after passing through the first light combining part are combined; a light homogenizing component, the light homogenizing component being used to homogenize the laser beams after being combined.

[0126] Through the above-mentioned setting, that is, since the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the two lasers changes differently after passing through the first light combining component, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the laser can be better homogenized by the light homogenizing component, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system is better.

[0127] In addition, if Figures 1 to 10 As shown, the embodiment of the present application further provides a light source system 100, comprising:

[0128] Two lasers 110, each of the two lasers 110 includes a different light emitting unit to respectively emit a first type of laser light and a second type of laser light having different wavelengths;

[0129] The light homogenizing component 130 is used to homogenize the laser beam after the combined light;

[0130] The light combining component 120 is used to combine the laser beams emitted by the two lasers 110. The light combining component 120 includes a first light combining component 121. The first light combining component 121 is located on the light output side of the two lasers 110 and is used to reflect the first type of laser from one of the two lasers 110 and transmit the first type of laser from the other, as well as reflect the second type of laser from one of the two lasers 110 and transmit the second type of laser from the other.

[0131] In some optional embodiments, the first light combining element 121 includes a first transmission area 1211 and a second transmission area 1212, wherein the first transmission area 1211 is used to transmit the first type of laser and reflect the second type of laser, and the second transmission area 1212 is used to transmit the second type of laser and reflect the first type of laser.

[0132] In some optional embodiments, the first transmission area 1211 is located above the second transmission area 1212;

[0133] The first transmission area 1211 is away from the first light emitting unit 111 of one of the two lasers 110 and faces the first light emitting unit 111 of the other of the two lasers 110, and the second transmission area 1212 is away from the second light emitting unit 112 of one of the two lasers 110 and faces the second light emitting unit 112 of the other of the two lasers 110.

[0134] In some optional embodiments, the light combining assembly 120 further includes a light combining prism 122 , which is located on the light emitting side of the first light combining component 121 . The light combining prism 122 is used to combine the laser beams passing through the first light combining component 121 .

[0135] It should be noted that the combined light can be adjusted by the light combining prism 122 to make the light spot more uniform. The light combining prism 122 can adjust the direction and intensity of the light as needed to achieve the desired light spot effect.

[0136] In some optional embodiments, the light homogenizing component 130 includes a diffuser 131, a focusing lens 132, and a light pipe 133. The diffuser 131 is located on the light-emitting side of the light-combining prism 122 to homogenize the laser beam from the light-combining prism 122. The focusing lens 132 is located between the diffuser 131 and the light pipe 133 to converge the homogenized laser beam.

[0137] In some optional embodiments, the light emission directions of the two lasers 110 have an angle, and the first light combining element 121 is located at the intersection of the emission light paths of the two lasers 110 .

[0138] In some optional embodiments, the present invention further includes two second light combining elements 123;

[0139] Two lasers 110 are arranged in parallel, wherein the first light emitting unit 111 and the second light emitting unit 112 of one laser 110 combine light through a first light combining component 121 , and the first light emitting unit 111 and the second light emitting unit 112 of the other laser 110 combine light through two second light combining components 123 .

[0140] In some optional embodiments, the relative positions of the two second light combining elements 123 respectively match the positions of different transmission areas of the first light combining element 121 .

[0141] It should be noted that, in this way, through the mutual cooperation of the two second light combining components 123, the laser emitted by the second laser 114 can be simultaneously converged on the light homogenizing component 130. At the same time, the laser emitted by the first laser 113 can be simultaneously converged on the light homogenizing component 130 through the first light combining component 121. The combined light can be adjusted by the light combining prism 122 to make the light spot more uniform.

[0142] The light source system provided in an embodiment of the present application includes: two lasers, each of which includes different light-emitting units to respectively emit a first type of laser and a second type of laser with different wavelengths; a light homogenizing component, which is used to homogenize the laser beams after light combination; a light combining component, which is used to combine the laser beams emitted by the two lasers, and the light combining component includes a first light combining component, which is located on the light output side of the two lasers and is used to reflect the first type of laser from one of the two lasers and transmit the first type of laser from the other, as well as reflect the second type of laser from one of the two lasers and transmit the second type of laser from the other. Since the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the two lasers changes differently after passing through the first light combining component, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the laser can be better homogenized by the light homogenizing component, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system is better.

[0143] In addition, an embodiment of the present application further provides a laser projection device, comprising:

[0144] Light source system 100, the light source system 100 is the light source system 100 mentioned above, and the light source system 100 is used to provide a laser beam to the optical machine lighting system;

[0145] An optical-mechanical lighting system, which is used to modulate the laser beam provided by the light source system 100 into an image beam and then emit it to the imaging system;

[0146] The imaging system is used to form an image beam and then emit it to the projection screen.

[0147] The specific structure, working principle and function of the light source system 100 have been described in detail in the aforementioned embodiment 1 and will not be repeated here.

[0148] The laser projection device provided in an embodiment of the present application includes: a light source system, which is the light source system mentioned above, and the light source system is used to provide a laser beam to the optical mechanical lighting system; an optical mechanical lighting system, which is used to modulate the laser beam provided by the light source system into an image beam and then emit it to the imaging system; and an imaging system, which is used to image the image beam and then emit it to the projection screen.

[0149] Through the above-mentioned setting, that is, since the first light combining component can adjust the phase of the laser emitted from the laser, the phase difference of the same color light of the two lasers changes differently after passing through the first light combining component, resulting in different polarization states of the output light beams, so that the lasers emitted by the two lasers interfere with each other to a lower degree in the subsequent light path in the light source system, and thus the probability of laser speckle appearing in the subsequent light path is lower, and it has a better speckle elimination effect. Therefore, after the light combining component guides the laser adjusted by the first light combining component to the light homogenizing component, the laser can be better homogenized by the light homogenizing component, thereby ensuring that the display effect of the projection picture projected by the laser projection device equipped with such a light source system is better.

[0150] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0151] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0152] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A light source system, characterized in that: include: at least one laser, the laser comprising a first light emitting unit for emitting a first type of laser light, and a second light emitting unit for emitting a second type of laser light, the first type of laser light and the second type of laser light having different wavelengths; A light combining component, wherein the light combining component comprises a first light combining component, wherein the first light combining component is located at a light output side of at least one of the lasers, so that the optical paths of the laser beams of the first type of laser and the second type of laser passing through the first light combining component are different, and the output light beams of the lasers after passing through the first light combining component are combined; A light homogenizing component is used to homogenize the laser beam after the combined light.

2. The light source system according to claim 1, characterized in that: The first light combining component has at least two transmission areas with different coatings, each of the transmission areas transmits one of the first type of laser and the second type of laser respectively, the first light-emitting unit of one of the two lasers and the second light-emitting unit of the other are both emitted from the same transmission area, and the output light beams of the two lasers after passing through the first light combining component are combined.

3. The light source system according to claim 2, characterized in that: The first light combining element includes a first transmission area and a second transmission area, the first transmission area is used to transmit the first type of laser and reflect the second type of laser, and the second transmission area is used to transmit the second type of laser and reflect the first type of laser.

4. The light source system according to any one of claims 1 to 3, characterized in that: The light combining component also includes a second light combining component, the first light combining component is located on the light output side of at least part of the lasers, so that the optical paths of at least part of the laser beams in the first type of laser and the second type of laser passing through the first light combining component are different, and the second light combining component is located on the light output side of another part of the lasers, and the output light beams of the lasers after passing through the first light combining component and the second light combining component respectively are combined.

5. The light source system according to claim 4, characterized in that: The two lasers are arranged in parallel, wherein the first light-emitting unit and the second light-emitting unit of one of the lasers combine light through the first light-combining component, and the first light-emitting unit and the second light-emitting unit of the other laser combine light through two second light-combining components respectively.

6. The light source system according to claim 5, characterized in that: The relative positions of the two second light combining elements respectively match the positions of different transmission areas of the first light combining element.

7. The light source system according to any one of claims 1 to 3, characterized in that: The light combining assembly further includes a light combining prism, which is located at the light emitting side of the first light combining component, and is used to combine the laser light beams passing through the first light combining component.

8. The light source system according to claim 7, characterized in that: The light homogenizing component includes a diffuser, a focusing lens and a light guide. The diffuser is located on the light-emitting side of the light-combining prism to homogenize the laser beam from the light-combining prism. The focusing lens is located between the diffuser and the light guide to converge the homogenized laser beam.

9. The light source system according to any one of claims 1 to 3, characterized in that: The light emission directions of the two lasers have an included angle, and the first light combining component is located at the intersection of the emission light paths of the two lasers.

10. A laser projection device, characterized in that: include: A light source system, wherein the light source system is the light source system according to any one of claims 1 to 9, and the light source system is used to provide a laser beam to an optical machine illumination system; An optomechanical lighting system, which is used to modulate the laser beam provided by the light source system into an image beam and then emit it to an imaging system; An imaging system is used to image the image light beam and then emit it to a projection screen.

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