Light source system

Abstract

The present invention provides a light source system, which includes a first light source, a second light source, a first light guiding element and a first light combining element; the first and second light sources respectively include a plurality of lasers, the first light source and the second light source are arranged with a dislocation along a first direction and a second direction respectively, the first direction is perpendicular to the second direction; the first light source emits a first beam group, the first beam group includes a plurality of first laser beams; the first light guiding element guides the first beam group to the first light combining element; the second light source emits a second beam group, the second beam group includes a plurality of second laser beams; the first light combining element transmits the first beam group and reflects the second beam group to form a first light combination; in the first light combination, a plurality of first and second beam groups are alternately inserted along the first direction, and a plurality of first and second laser beams are alternately inserted along a third direction, the first direction is perpendicular to the third direction. Compared with the related art, the light source system of the present invention has good light homogenization effect, small expansion amount and high energy utilization rate.

Description

Technical Field

[0001] The present invention relates to the field of projection display, and particularly to a light source system.

Background Art

[0002] In real life, projection devices are increasingly widely used. In order to ensure good projection and viewing effects, it is necessary to correct the projection screen of the projection device.

[0003] In related technologies, pure lasers such as red, green, and blue are added to the light source system for combining with fluorescence to improve the system efficiency and color gamut. The method of combining fluorescence and laser is to add a regional coating lens in front of the light homogenizing device for extended amount combination. In order not to lose energy, the angle of the laser at the combination point must be close to that of the fluorescence. Therefore, the area of the region is determined by the extended amount of the pure laser. When the extended amount of the pure laser is large, the region is large, and the fluorescence loss will increase; the pure laser is composed of multiple lasers, and the diffusion angle of a single laser is very small. In order to obtain a small light spot in the region, a surface angle conversion needs to be performed in front of the region to change the angular distribution into a surface distribution, and the original surface distribution needs to be changed into an angular distribution, so a surface angle conversion needs to be performed in front of the region, resulting in a discrete point angular distribution of the incident square rod.

[0004] However, in related technologies, due to the small light spot of a single laser, the angular distribution entering the square rod is discontinuous, resulting in poor light homogenizing effect; in addition, since the pure laser is combined by splicing, this method increases the extended amount, resulting in a large regional coating, more fluorescence loss, and low energy utilization efficiency.

[0005] Therefore, it is necessary to provide a new light source system to solve the above technical problems.

Summary of the Invention

[0006] The purpose of the present invention is to provide a light source system with good light homogenizing effect, small extended amount, and high energy utilization efficiency.

[0007] To achieve the above object, the present invention provides a light source system, which includes a first light source, a second light source, a first light guiding element, and a first light combining element; the first light source and the second light source respectively include a plurality of lasers, the first light source and the second light source are arranged in a staggered manner along a first direction and a second direction respectively, and the first direction and the second direction are perpendicular; the first light guiding element is disposed opposite to the first light source, and the first light combining element is disposed opposite to the second light source and the first light guiding element respectively;

[0008] The first light source is used to emit a plurality of first light beam groups directed to the first light guiding element, and each first light beam group includes a plurality of first laser beams respectively emitted by the plurality of lasers of the first light source;

[0009] The first light guiding element is configured to guide the first light beam group to the first light combining element; the second light source is configured to emit a second light beam group that is directed towards the first light combining element, and the second light beam group includes a plurality of second laser beams respectively emitted by a plurality of lasers of the second light source; the first light combining element is configured to transmit the first light beam group and reflect the second light beam group, so as to combine the first light beam group and the second light beam group to form a first combined light; a plurality of the first light beam groups and a plurality of the second light beam groups in the first combined light are arranged in an alternating and interleaving manner along the first direction, and a plurality of the first laser beams and a plurality of the second laser beams in the first combined light are arranged in an alternating and interleaving manner along a third direction, and the first direction and the third direction are perpendicular to each other.

[0010] Preferably, the first light guiding element and the first light combining element are arranged at a staggered interval along the second direction.

[0011] Preferably, the first light guiding element and the first light combining element are arranged in a staggered manner along the first direction, and the staggering distance between the first light guiding element and the first light combining element in the first direction is half of the center distance between two adjacent lasers along the first direction.

[0012] Preferably, the projection size of the first light guiding element perpendicular to the second direction is greater than the projection size of the first light combining element perpendicular to the second direction, or the projection size of the first light guiding element perpendicular to the second direction is less than the projection size of the first light combining element perpendicular to the second direction.

[0013] Preferably, the staggering distance between the first light source and the second light source in the first direction is half of the center distance between two adjacent lasers along the first direction, and the staggering distance between the first light source and the second light source in the second direction is half of the center distance between two adjacent lasers along the second direction.

[0014] Preferably, the light source system further includes a first half-wave plate disposed between the first light source and the first light guiding element, and the laser emitted by the laser of the first light source passes through the first half-wave plate to achieve a polarization state transformation to form the first laser beam; the first laser beam is a P-polarized light, and the second laser beam is an S-polarized light.

[0015] Preferably, the light source system further includes a third light source, a fourth light source, a second light guiding element, and a second light combining element;

[0016] The third light source and the fourth light source each include a plurality of lasers, and the third light source and the fourth light source are arranged with a dislocation along the first direction and the second direction respectively; the second light guiding element is disposed opposite to the third laser and the first light combining element respectively, and the second light combining element is disposed opposite to the fourth light source and opposite to the third light guiding element;

[0017] The third light source is configured to emit a plurality of third light beam groups directed to the second light guiding element, and each third light beam group includes a plurality of third laser beams respectively emitted by the plurality of lasers of the third light source; the second light guiding element is configured to guide the third light beam group to the second light combining element; the fourth light source is configured to emit a fourth light beam group directed to the second light combining element, and each fourth light beam group includes a plurality of fourth laser beams respectively emitted by the plurality of lasers of the fourth light source; the second light combining element is configured to transmit the third light beam group and reflect the fourth light beam group, so as to combine the third light beam group and the fourth light beam group to form a second combined light; a plurality of the third light beam groups and a plurality of the fourth light beam groups in the second combined light are arranged with alternating slits along the first direction, and a plurality of the third laser beams and a plurality of the fourth laser beams in the second combined light are arranged with alternating slits along the third direction; the first combined light sequentially passes through the second light guiding element and the second light combining element, and the first combined light and the second combined light fill the gaps between the laser beams of each other to form an output combined light.

[0018] Preferably, the second light guiding element and the second light combining element are arranged with a dislocation and spaced apart from each other along the second direction.

[0019] Preferably, the second light guiding element and the second light combining element are arranged with a dislocation along the first direction, and the dislocation distance between the second light guiding element and the second light combining element in the first direction is half of the center distance between two adjacent lasers along the first direction.

[0020] Preferably, the projection size of the second light guiding element perpendicular to the second direction is greater than the projection size of the second light combining element perpendicular to the second direction, or the projection size of the second light guiding element perpendicular to the second direction is less than the projection size of the second light combining element perpendicular to the second direction.

[0021] Preferably, the dislocation distance between the third light source and the fourth light source in the first direction is half of the center distance between two adjacent lasers along the first direction, and the dislocation distance between the third light source and the fourth light source in the second direction is half of the center distance between two adjacent lasers along the second direction.

[0022] Preferably, the light source system further includes a second half-wave plate disposed between the third light source and the second light guiding element, and a third half-wave plate disposed between the fourth light source and the second light combining element. The lasers emitted by the plurality of third light sources respectively undergo polarization state conversion through the second half-wave plate to form the third laser beam, and the lasers emitted by the plurality of fourth light sources respectively undergo polarization state conversion through the third half-wave plate to form the fourth laser beam; the first laser beam and the second laser beam are both P-polarized light, and the third laser beam and the fourth laser beam are both S-polarized light.

[0023] Preferably, the first light combining element includes a plurality of first reflection regions and a plurality of first transmission regions, the first reflection regions and the first transmission regions are arranged alternately in sequence, the first reflection regions are used for reflecting the second beam group, and the first transmission regions are used for transmitting the first beam group; the second light combining element includes a plurality of second reflection regions and a plurality of second transmission regions, the second reflection regions and the transmission regions are arranged alternately in sequence, the second reflection regions are used for reflecting the fourth beam group and transmitting the first beam group and the second beam group, and the second transmission regions are used for transmitting the first beam group, the second beam group and the third beam group.

[0024] Compared with the related art, in the light source system of the present invention, the first light source and the second light source are respectively arranged with a dislocation along the first direction and the second direction, the first direction and the second direction are perpendicular, so that the first beam group emitted by the first light source and the second beam group emitted by the second light source are combined by the first light combining element to obtain a first combination. In the first combination, the plurality of first beam groups and the plurality of second beam groups are arranged with alternately inserted slits along the first direction, and the plurality of first laser beams and the plurality of second laser beams in the first combination are arranged with alternately inserted slits along the third direction, the first direction and the third direction are perpendicular. Through the above arrangement, the spot distribution of the first combination obtained is continuous, effectively improving the light homogenization effect of the light source system; in addition, by performing the combination process in a manner of respectively arranging with inserted slits and polarization combination along two different directions (i.e., the first direction and the third direction), the expansion dilution amount of the emitted laser beam is small, effectively reducing the area of regional coating, reducing fluorescence loss, and improving the energy utilization efficiency.

Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0026] Figure 1 It is a schematic structural diagram of the first embodiment of the light source system of the present invention;

[0027] Figure 2 This is a partial structural schematic diagram of the first embodiment of the light source system of the present invention;

[0028] Figure 3 This is a schematic diagram of the relative positions of the first light source and the second light source of the first embodiment of the light source system of the present invention;

[0029] Figure 4 This is a schematic diagram of the light spot after the combination of the first light beam group and the second light beam group of the first embodiment of the light source system of the present invention;

[0030] Figure 5 This is a schematic diagram of the exit illuminance distribution of the light spots of the light source system of the present invention and the light source system of the related art after passing through a square rod;

[0031] Figure 6 This is a structural schematic diagram of the second embodiment of the light source system of the present invention;

[0032] Figure 7 This is a schematic diagram of the relative positions of the first light source and the second light source of the second embodiment of the light source system of the present invention;

[0033] Figure 8 This is a structural schematic diagram of the first light combining element and the second light combining element of the second embodiment of the light source system of the present invention.

Specific Embodiments

[0034] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0035] Embodiment 1

[0036] Please refer to Figure 1-4 As shown, the present invention provides a light source system 100, which includes a first light source 1, a second light source 2, a first light guiding element 3, and a first light combining element 4.

[0037] The first light source 1 includes a plurality of lasers. The plurality of lasers of the first light source 1 are arranged at intervals along a first direction (i.e., the X-axis direction) and arranged at intervals along a second direction (i.e., the Y-axis direction) perpendicular to the first direction. The first light source 1 is used to emit a plurality of first light beam groups 110 directed to the first light guiding element 3. The first light beam group 110 includes a plurality of first laser beams respectively emitted by the plurality of lasers of the first light source 1.

[0038] The second light source 2 includes a plurality of lasers. The lasers of the second light source 2 are arranged at intervals along the first direction and the second direction respectively; the lasers of the second light source 2 and the lasers of the first light source 1 are alternately arranged in sequence along the first direction with a dislocation and are spaced apart from each other by a certain distance. The second light source 2 is used to emit a second light beam group 210 directed at the first light combining element 4. The second light beam group 210 includes a plurality of second laser beams respectively emitted by the lasers of the second light source 2.

[0039] It is worth mentioning that the laser is used to emit one of S-polarized light and P-polarized light. The polarized light emitted by the lasers of the first light source 1 and the polarized light emitted by the lasers of the second light source 2 can be the same or different, and can be specifically selected according to the actual situation. For example, in this embodiment, the lasers of the first light source 1 and the second light source 2 are both used to emit S-polarized light.

[0040] Furthermore, the light source system 100 further includes a first half-wave plate 5 (i.e., a half-wave plate) for changing the polarization state of the laser beam. The first half-wave plate 5 is disposed between the first light source 1 and the first light guiding element 3. The S-polarized light emitted by each laser of the first light source 1 passes through the first half-wave plate 5 to achieve a polarization state transformation to form P-polarized light, and this P-polarized light serves as the first laser beam, while the S-polarized light emitted by the lasers of the second light source 2 serves as the second laser beam. Of course, as other embodiments, it is also feasible that the lasers of the first light source and the second light source are both used to emit P-polarized light. At this time, a first half-wave plate needs to be set to perform a polarization state transformation on the P-polarized light emitted by the lasers of the first light source or the second light source; or, as other embodiments, it is also feasible that one of the lasers of the first light source and the second light source emits S-polarized light and the other emits P-polarized light. At this time, there is no need to set a first half-wave plate for polarization state transformation.

[0041] Here, it should be noted that the first direction is the height direction of the first light source 1 and the second light source 2, and the second direction is the length direction of the first light source 1 and the second light source 2, so that the first light source 1 and the second light source 2 are arranged at intervals with an up-and-down dislocation along the first direction, and the first light source 1 and the second light source 2 are arranged at intervals with a left-and-right dislocation along the second direction, providing conditions for left-and-right slotting between adjacent first laser beams and second laser beams.

[0042] Furthermore, the relative distance between the first light source and the second light source is not limited, and the misalignment distance between the first light source and the second light source along the first direction and the misalignment distance along the second direction can be adjusted according to the actual situation. For example, in this embodiment, for details, refer to Figure 3 As shown, the misalignment distance H0 between the first light source 1 and the second light source 2 in the first direction is half of the center distance between two adjacent lasers along the first direction, and the misalignment distance L0 between the first light source 1 and the second light source 2 in the second direction is half of the center distance between two adjacent lasers along the second direction.

[0043] The first light guiding element 3 is an optical reflector, which is relatively spaced apart from the first light source 1, and the first light guiding element 3 is used to guide the first light beam group 110 to the first light combining element 4.

[0044] The first light combining element 4 is a polarization coated reflector, which is relatively spaced apart from the second light source 2 and the first light guiding element 3 respectively. Specifically, the first light combining element 4 can transmit P-polarized light and reflect S-polarized light. The first light combining element 4 is used to reflect the second light beam group 210 composed of S-polarized light and transmit the first light beam group 110 composed of P-polarized light; of course, the first light combining element can also be specifically set according to the specific polarization states of the first laser beam and the second laser beam.

[0045] It is worth mentioning that the specific position setting between the first light guiding element and the first light combining element is not limited. In this embodiment, the first light guiding element 3 and the first light combining element 4 are misaligned and spaced apart from each other along the second direction.

[0046] As one of the implementation schemes, the first light guiding element 3 and the first light combining element 4 are also misaligned with each other along the first direction, and the misalignment distance between the first light guiding element 3 and the first light combining element 4 in the first direction is half of the center distance between two adjacent lasers along the first direction.

[0047] As another embodiment, the projection size of the first light guide element 3 perpendicular to the second direction is smaller than the projection size of the first light combining element 4 perpendicular to the second direction. At this time, the relative position between the two does not need to consider the misalignment problem in the first direction. In this embodiment, the first light beam group 110 is reflected by the first light guide element 3 to the first light combining element 4, and the first light combining element 4 reflects the second light beam group 210 and transmits the first light beam group 110 to combine the first light beam group 110 and the second light beam group 210 to form a first combined light. At this time, a plurality of the first light beam groups 110 and a plurality of the second light beam groups 210 in the first combined light are alternately arranged in slots along the first direction in sequence, and a plurality of the first laser beams and a plurality of the second laser beams in the first combined light are alternately arranged in slots along the third direction (the third direction is perpendicular to the first direction, that is, the Y' axis direction) in sequence, so that a plurality of the first laser beams and a plurality of the second laser beams are arranged in upper and lower slots along the first direction and left and right slots along the third direction and are polarization combined to form a first combined light, and this first combined light is used as the output combined light. Figure 4 shows a schematic diagram of the spot distribution of the output combined light. From Figure 4 it can be seen that the first light beam group 110 and the second light beam group 210 are arranged alternately along the first direction, and the four light spots on each first light beam group 110 respectively represent the spots formed by four first laser beams misaligned with each other along the third direction, and the four light spots on each second light beam group 210 respectively represent the spots formed by four second laser beams misaligned with each other along the third direction. The spot distribution of this first combined light is continuous, making the spot distribution of the first combined light uniform, thereby improving the light homogenization effect of the light source system 100. Of course, in other embodiments, it is also feasible that the projection size of the first light guide element perpendicular to the second direction is larger than the projection size of the first light combining element perpendicular to the second direction.

[0048] More preferably, the light source system 100 further includes a scattering light guide assembly 6, a scattering device 7, an output light guide assembly 8, and a square rod 9.

[0049] The scattering light guide assembly 6 is used to guide the first combined light emitted from the first light combining element 4 to the scattering device 7; specifically, the scattering light guide assembly 6 includes a first lens 61 and a reflecting mirror 62. The first lens 61 transmits the first combined light to the reflecting mirror 62, and the reflecting mirror 62 reflects the first combined light to the scattering device 7.

[0050] The scattering device 7 is a scattering wheel, and this scattering wheel is used for surface angle conversion of the first combined light. After being scattered by the scattering device 7, the spot distribution of the first combined light is more uniform.

[0051] The outgoing lens group 8 guides the first combined light after the plane angle conversion to the square rod 9 for outgoing emission; specifically, the outgoing lens group 8 includes a second lens 81, a third lens 82, and an area-coated reflector 83. The first combined light after the plane angle conversion is transmitted through the second lens 81 and the third lens 82 in sequence to the area-coated reflector 83. The area-coated reflector 83 reflects the first combined light after the plane angle conversion and transmits the external fluorescence 80, so that the first combined light and the external fluorescence 80 are combined. The first combined light and the external fluorescence 80 after combination are incident into the square rod 9 for light homogenization processing through the square rod 9, and finally are emitted outward through the square rod 9.

[0052] In the above structure, the distance between two adjacent lasers is defined as L. If the light intensity at L / 2 (i.e.) is to be the same as that at L, according to the formula of Gaussian scattering:

[0053] P(θ) = P0 × exp(0.5 × (θ / σ) 2 )

[0054] In the formula:

[0055] θ refers to the angle difference between the first and second laser beams after passing through the outgoing lens;

[0056] P(θ) refers to the light intensity after deviating from the center direction by an angle θ. As θ increases, P(θ) decreases;

[0057] P0 refers to the light intensity in the center direction;

[0058] α refers to the scattering angle at which the light intensity drops to 50% of the center light intensity;

[0059] σ refers to the standard scattering angle, which is determined by the scattering angle of the scattering wheel and is a fixed value for the same scattering wheel.

[0060] Assume that the focal length of the first lens 61 is f. Then, the angular difference Δθ between two adjacent lasers at the scattering device 7 is Δθ = arctan(0.5L / f). If the intensity at Δθ / 2 is to be equal to the maximum light intensity, then Δθ / 2 = α, that is, the scattering angle α = 0.5×arctan(0.5L / f). Assume L = 6 mm and f = 50 mm, then the scattering angle α = 3.4° can be calculated. After combining the light using the up-down, left-right slit setting and polarization method, the distance becomes half of the original, L = 3 mm, and thus the scattering angle α = 1.7°, which is half of the original. If the maximum angle of the entire light spot after laser light combination is 9°, then without using polarization slit light combination, the maximum angle of the light spot after passing through the scattering device 7 is approximately 12.4°. The angle of the light spot passing through the scattering device 7 after polarization slit light combination is 10.7°, and the expansion amount saved compared to the original scheme is approximately 25%. Therefore, the coated area of the area-coated mirror 83 can be reduced by approximately 25%, and the fluorescence utilization efficiency can be increased by 2 - 3%.

[0061] See also Figure 5 as shown in, where Figure 5 (a) is a schematic diagram of the exit illuminance distribution of the light spot of the light source system in the related art passing through the square rod, that is, the schematic diagram of the exit illuminance distribution of the light spot after non-polarization slit light combination. The contrast of the light spot after non-polarization slit light combination ((maximum illuminance - minimum illuminance) / average illuminance) is 0.67, while Figure 5 (b) is a schematic diagram of the exit illuminance distribution of the light spot of the light source system of the present invention passing through the square rod, that is, the schematic diagram of the exit illuminance distribution of the light spot after up-down, left-right slit and polarization light combination. The contrast of this polarization slit light combination light spot is 0.21, which is only 1 / 3 of the contrast of the original related art, and the light homogenization effect is improved.

[0062] Therefore, in the above structure, by performing light combination through the up-down, left-right slit setting and polarization light combination method, this structural setting effectively reduces the dilution amount of the expansion amount of the emitted laser beam, reduces the coated area of the area-coated mirror 83, thereby reducing fluorescence loss and improving energy utilization efficiency; in addition, since the first laser beam and the second laser beam emitted have different polarization states, and both pass through the scattering wheel for scattering treatment, it is beneficial to eliminate the speckle in the first light combination.

[0063] Embodiment 2

[0064] Please refer to Figure 6-8 as shown. The light source system 100a of Embodiment 2 is partially the same as the structure of the light source system of Embodiment 1. For the same parts, they will not be described in detail here. Below, the parts of the light source system 100a of Embodiment 2 that are different from the light source system of Embodiment 1 will be described in combination with the specific structure:

[0065] The light source system 100a includes a first light source 1a, a second light source 2a, a third light source 3a, a fourth light source 4a, a first light guiding element 5a, a first light combining element 6a, a second light guiding element 7a, and a second light combining element 8a.

[0066] The first light source 1a includes a plurality of lasers. The plurality of lasers of the first light source 1a are arranged at intervals along a first direction (i.e., the X-axis direction) and at intervals along a second direction (i.e., the Y-axis direction). The first light source 1a is configured to emit a plurality of first beam groups 110a that are directed to the first light guiding element 5a. The first beam group 110a includes a plurality of first laser beams respectively emitted by the plurality of lasers of the first light source 1a.

[0067] The second light source 2a includes a plurality of lasers. The plurality of lasers of the second light source 2a are arranged at intervals along the first direction and the second direction. The plurality of lasers of the second light source 2a and the plurality of lasers of the first light source 1a are alternately arranged in sequence and are spaced apart from each other along the first direction. The second light source 2 is configured to emit a second beam group 210a that is directed to the first light combining element 6a. The second beam group 210a includes a plurality of second laser beams respectively emitted by the plurality of lasers of the second light source 2a.

[0068] The third light source 3a includes a plurality of lasers. The plurality of third lasers of the third light source 3a are arranged at intervals along the first direction and the second direction. The third light source 3a is configured to emit a plurality of third beam groups 310a that are directed to the second light guiding element 7a. The third beam group 310a includes a plurality of third laser beams respectively emitted by the plurality of lasers of the third light source 3a.

[0069] The fourth light source 4a includes a plurality of lasers. The plurality of fourth lasers of the fourth light source 4a are arranged at intervals along the first direction and the second direction. The plurality of fourth lasers of the fourth light source 4a and the plurality of third lasers of the third light source 3a are alternately arranged in sequence along the first direction. The fourth light source 4a is configured to emit a fourth beam group 410a that is directed to the second light combining element 8a. The fourth beam group 210a includes a plurality of fourth laser beams respectively emitted by the plurality of lasers of the fourth light source 4a.

[0070] Furthermore, the relative distance between the first light source and the second light source is not limited. The distance of the vertical offset along the first direction and the distance of the horizontal offset along the second direction between the first light source and the second light source can be adjusted according to the actual situation. For example, in this embodiment, for details, refer to Figure 7As shown, the misalignment distance H0 between the first light source 1a and the second light source 2a in the first direction is half of the center distance between two adjacent lasers in the first direction, and the misalignment distance L0 between the first light source 1a and the second light source 2a in the second direction is half of the center distance between two adjacent lasers in the second direction; the relative distance between the third light source and the fourth light source is also not limited, and the misalignment distance in the up and down direction along the first direction and the misalignment distance in the left and right direction along the second direction between the third light source and the fourth light source can be adjusted according to the actual situation. For example, in this embodiment, the misalignment distance H1 between the third light source 3a and the fourth light source 4a in the first direction is half of the center distance between two adjacent lasers in the first direction, and the misalignment distance L1 between the third light source 3a and the fourth light source 4a in the second direction is half of the center distance between two adjacent lasers in the second direction; it should be noted here that the above misalignment distance H0 can be the same as the misalignment distance H1, and the above misalignment distance L0 can be the same as the misalignment distance L1.

[0071] It is worth mentioning that the laser is used to emit one of S-polarized light and P-polarized light; the polarized lights emitted by the lasers of the first light source 1a, the second light source 2a, the third light source 3a and the fourth light source 4a can be the same or different, and can be specifically selected according to the actual situation. For example, in this embodiment, the lasers of the first light source 1a, the second light source 2a, the third light source 3a and the fourth light source 4a are all used to emit P-polarized light.

[0072] In this embodiment, the P-polarized light emitted by the lasers of each first light source 1a serves as the first laser beam; the P-polarized light emitted by the lasers of each second light source 2a serves as the second laser beam.

[0073] Furthermore, the light source system 100a further includes a second half-wave plate 9a and a third half-wave plate 10a for changing the polarization state of the laser beam. Among them, the second half-wave plate 9a is disposed between the third light source 3a and the second light guiding element 7a, and the P-polarized light emitted by the lasers of each third light source 3a passes through the second half-wave plate 9a to achieve a polarization state transformation to form S-polarized light, and this S-polarized light serves as the third laser beam; the third half-wave plate 10a is disposed between the fourth light source 4a and the two-in-one light element 8a, and the P-polarized light emitted by the lasers of each fourth light source 4a passes through the third half-wave plate 10a to achieve a polarization state transformation to form S-polarized light, and this S-polarized light serves as the fourth laser beam.

[0074] The first light guiding element 5a is an optical mirror, which is disposed at a relative interval with respect to the first light source 1a. The first light guiding element 5a is configured to guide the first light beam group 110a to exit to the first light combining element 6a.

[0075] The first light combining element 6a is an area-coated mirror, which is respectively disposed at a relative interval with respect to the second light source 2a and the first light guiding element 5a. Specifically, as detailed in Figure 8 (a), the first light combining element 6a includes a plurality of first reflection regions 61a and a plurality of first transmission regions 62a. The first reflection regions 61a and the transmission regions 62a are arranged alternately. The first reflection regions 61a are configured to reflect the second light beam group 210a, and the first transmission regions 61a are configured to transmit the first light beam group 110a.

[0076] The second light guiding element 7a is an optical polarization mirror that transmits S light and reflects P light. It is disposed at a relative interval with respect to the third light source 3a. The second light guiding element 7a is configured to guide the third light beam group 310a, the first light beam group 110a, and the second light beam group 210a to exit to the second light combining element 8a.

[0077] The second light combining element 8a is a polarization area-coated mirror, which is respectively disposed at a relative interval with respect to the fourth light source 4a and the second light guiding element 7a. Specifically, as detailed in Figure 8 (a), the second light combining element 8a includes a plurality of second reflection regions 81a and a plurality of second transmission regions 82a. The second reflection regions 81a and the second transmission regions 82a are arranged alternately. The second reflection regions 81a transmit P light and reflect S light, and are configured to reflect the fourth light beam group 410a and transmit the first light beam group 110a and the second light beam group 210a. The second transmission regions 82a are configured to transmit the third light beam group 310a, the second light beam group 210a, and the first light beam group 110a.

[0078] It is worth mentioning that the specific position setting between the first light guiding element and the first light combining element is not limited, and the specific position setting between the second light guiding element and the second light combining element is also not limited. In this embodiment, the first light guiding element 5a and the first light combining element 6a are arranged at a mutually staggered interval along the second direction, and the second light guiding element 7a and the second light combining element 8a are arranged at a mutually staggered interval along the second direction.

[0079] As one of the implementation manners, the first light guiding element 5a and the first light combining element 6a are also arranged in a dislocation manner along the first direction. The dislocation distance between the first light guiding element 5a and the first light combining element 6a in the first direction is half of the center distance between two adjacent lasers along the first direction. The second light guiding element 7a and the second light combining element 8a are also arranged in a dislocation manner along the first direction. The dislocation distance between the second light guiding element 7a and the second light combining element 8a in the first direction is half of the center distance between two adjacent lasers along the first direction.

[0080] As another implementation manner, the projection size of the first light guiding element 5a perpendicular to the second direction is smaller than the projection size of the first light combining element 6a perpendicular to the second direction, and the projection sizes of the second light guiding element 7a perpendicular to the second direction are all smaller than the projection size of the second light combining element 8a perpendicular to the second direction. The relative positions of the first light guiding element 5a, the first light combining element 6a, the second light guiding element 7a and the second light combining element 8a do not need to consider the dislocation problem in the first direction. Of course, in other implementation manners, it is also feasible that the projection size of the first light guiding element perpendicular to the second direction is larger than the projection size of the first light combining element perpendicular to the second direction, and the projection size of the second light guiding element perpendicular to the second direction is larger than the projection size of the second light combining element perpendicular to the second direction.

[0081] In this implementation manner, the first light beam group 110a is reflected by the first light guiding element 5a to the first light combining element 6a. The first light combining element 6a reflects the second light beam group 210 and transmits the first light beam group 110 to combine the first light beam group 110a and the second light beam group 210a to form a first combination. At this time, multiple first light beam groups 110a and multiple second light beam groups 210a in the first combination are alternately arranged in a slotting manner along the first direction in turn, and multiple first laser beams and multiple second laser beams in the first combination are alternately arranged in a slotting manner along the direction perpendicular to the first direction in turn, so that multiple first laser beams and multiple second laser beams are arranged in a vertical slotting manner along the first direction and in a left-right slotting manner along the direction perpendicular to the first direction and are polarization combined to form a first combination.

[0082] The third beam group 310a is reflected by the second light guide element 7a to the first light combining element 8a. The second light combining element 8a reflects the fourth beam group 410a and transmits the third beam group 310a to combine the third beam group 310a and the fourth beam group 410a to form a second light combination. At this time, multiple third beam groups 310a and multiple fourth beam groups 410a in the second light combination are alternately arranged in a slotting manner in sequence along the first direction, and multiple third laser beams and multiple fourth laser beams in the second light combination are alternately arranged in a slotting manner in sequence along a direction perpendicular to the first direction, so that multiple third laser beams and multiple fourth laser beams are arranged in a vertical slotting manner along the first direction and in a left-right slotting manner along the direction perpendicular to the first direction and are polarization combined to form a second light combination.

[0083] The first light combination sequentially passes through the second light guide element 7a and the second light combining element 8a, and the first light combination and the second light combination fill the gaps between the laser beams of each other to form an output light combination. The spot size of the output light combination is similar to that of a single laser, the distribution of its spots is more continuous, the maintenance rate of the expansion amount is good. Through the mutual filling of the first light combination and the second light combination, the gaps between adjacent spots are effectively reduced, making the surface distribution of the spots more uniform, thereby more effectively improving the light homogenization effect of the light source system 100a.

[0084] Compared with the related art, in the light source system of the present invention, the first light source and the second light source are respectively arranged in a staggered manner along the first direction and the second direction, and the first direction and the second direction are perpendicular. The first beam group emitted by the first light source and the second beam group emitted by the second light source are combined by the first light combining element to obtain a first light combination. Multiple first beam groups and multiple second beam groups in the first light combination are alternately arranged in a slotting manner in sequence along the first direction, and multiple first laser beams and multiple second laser beams in the first light combination are alternately arranged in a slotting manner in sequence along the third direction, and the first direction and the third direction are perpendicular. The spot distribution of the first light combination obtained through the above settings is continuous, effectively improving the light homogenization effect of the light source system; in addition, through the light combination process of slotting and polarization combination along two different directions (i.e., the first direction and the third direction), the dilution amount of the expansion amount of the output laser beam is small, effectively reducing the area of regional coating, reducing fluorescence loss, and improving the energy utilization efficiency.

[0085] The above are only the embodiments of the present invention. It should be noted here that for those of ordinary skill in the art, without departing from the inventive concept of the present invention, improvements can still be made, but these all belong to the protection scope of the present invention.

Claims

1. A light source system, characterized in that, It includes a first light source, a second light source, a first light guiding element, and a first light combining element; the first light source and the second light source are arranged at a staggered interval along a first direction, the first light source and the second light source are arranged at a staggered interval along a second direction, and the first direction and the second direction are perpendicular; The first light source and the second light source respectively include a plurality of lasers. The plurality of lasers of the first light source are respectively arranged at intervals along the first direction and the second direction. The plurality of lasers of the second light source are respectively arranged at intervals along the first direction and the second direction; the plurality of lasers of the second light source and the plurality of lasers of the first light source are respectively arranged in an alternating and staggered manner along the first direction and are spaced apart from each other by a certain distance; The first light guiding element is arranged opposite to the first light source, and the first light combining element is respectively arranged opposite to the second light source and the first light guiding element; the first light source is used to emit a plurality of first light beam groups directed to the first light guiding element, and each first light beam group includes a plurality of first laser beams respectively emitted by the plurality of lasers of the first light source; The first light guiding element is used to guide the first light beam group to the first light combining element; the second light source is used to emit a second light beam group directed to the first light combining element, and the second light beam group includes a plurality of second laser beams respectively emitted by the plurality of lasers of the second light source; The first light combining element is used to transmit the first light beam group and reflect the second light beam group to combine the first light beam group and the second light beam group to form a first combined light; The plurality of first light beam groups and the plurality of second light beam groups in the first combined light are arranged in an alternating and interlaced manner along the first direction. The plurality of first laser beams and the plurality of second laser beams in the first combined light are arranged in an alternating and interlaced manner along a third direction, and the first direction and the third direction are perpendicular; the plurality of first laser beams and the plurality of second laser beams are arranged in an interlaced manner along the first direction and along the third direction and are polarization combined to form the first combined light.

2. The light source system according to claim 1, wherein The first light guiding element and the first light combining element are arranged at a staggered interval along the second direction.

3. The light source system according to claim 2, wherein The first light guiding element and the first light combining element are arranged in a staggered manner along the first direction, and the staggered distance between the first light guiding element and the first light combining element in the first direction is half of the center distance between two adjacent lasers along the first direction.

4. The light source system according to claim 2, wherein The projection size of the first light guiding element perpendicular to the second direction is greater than the projection size of the first light combining element perpendicular to the second direction, or the projection size of the first light guiding element perpendicular to the second direction is less than the projection size of the first light combining element perpendicular to the second direction.

5. The light source system according to claim 1, wherein The staggered distance between the first light source and the second light source in the first direction is half of the center distance between two adjacent lasers along the first direction, and the staggered distance between the first light source and the second light source in the second direction is half of the center distance between two adjacent lasers along the second direction.

6. The light source system according to claim 1, characterized in that, The light source system further includes a first half-wave plate disposed between the first light source and the first light guiding element. The laser of the first light source emits laser light that undergoes a polarization state transformation through the first half-wave plate to form the first laser beam. The first laser beam is a P-polarized light, and the second laser beam is an S-polarized light.

7. The light source system according to claim 1, wherein The light source system further includes a third light source, a fourth light source, a second light guiding element, and a second light combining element. The third light source and the fourth light source each include a plurality of lasers. The third light source and the fourth light source are arranged in a staggered manner along the first direction and the second direction, respectively. The second light guiding element is disposed opposite to the third light source and the first light combining element, respectively. The second light combining element is disposed opposite to the fourth light source and opposite to the second light guiding element. The third light source is configured to emit a plurality of third beam groups directed towards the second light guiding element. Each third beam group includes a plurality of third laser beams respectively emitted by the plurality of lasers of the third light source. The second light guiding element is configured to guide the third beam groups to the second light combining element. The fourth light source is configured to emit a fourth beam group directed towards the second light combining element. The fourth beam group includes a plurality of fourth laser beams respectively emitted by the plurality of lasers of the fourth light source. The second light combining element is configured to transmit the third beam groups and reflect the fourth beam group to combine the third beam groups and the fourth beam group to form a second combined light. The plurality of third beam groups and the plurality of fourth beam groups in the second combined light are arranged in an alternating and interlaced manner along the first direction. The plurality of third laser beams and the plurality of fourth laser beams in the second combined light are arranged in an alternating and interlaced manner along the third direction. The first combined light sequentially passes through the second light guiding element and the second light combining element, and the first combined light and the second combined light fill the gaps between each other's laser beams to form an output combined light.

8. The light source system according to claim 7, characterized in that, The second light guiding element and the second light combining element are arranged in a staggered and spaced manner along the second direction.

9. The light source system according to claim 8, characterized in that, The second light guiding element and the second light combining element are arranged in a staggered manner along the first direction. The staggered distance between the second light guiding element and the second light combining element in the first direction is half of the center distance between two adjacent lasers along the first direction.

10. The light source system according to claim 8, wherein, The projection size of the second light guiding element perpendicular to the second direction is greater than the projection size of the second light combining element perpendicular to the second direction, or the projection size of the second light guiding element perpendicular to the second direction is less than the projection size of the second light combining element perpendicular to the second direction.

11. The light source system according to claim 7, wherein The staggered distance between the third light source and the fourth light source in the first direction is half of the center distance between two adjacent lasers along the first direction. The staggered distance between the third light source and the fourth light source in the second direction is half of the center distance between two adjacent lasers along the second direction.

12. The light source system according to claim 7, wherein The light source system further includes a second half-wave plate disposed between the third light source and the second light guide element, and a third half-wave plate disposed between the fourth light source and the second light combining element. The lasers emitted by the plurality of third light sources respectively achieve polarization state conversion through the second half-wave plate to form the third laser beam, and the lasers emitted by the plurality of fourth light sources respectively achieve polarization state conversion through the third half-wave plate to form the fourth laser beam. The first laser beam and the second laser beam are both P-polarized light, and the third laser beam and the fourth laser beam are both S-polarized light.

13. The light source system according to claim 7, characterized in that, The first light combining element includes a plurality of first reflection regions and a plurality of first transmission regions, which are arranged alternately in sequence. The first reflection regions are used for reflecting the second beam group, and the first transmission regions are used for transmitting the first beam group. The second light combining element includes a plurality of second reflection regions and a plurality of second transmission regions, which are arranged alternately in sequence. The second reflection regions are used for reflecting the fourth beam group and transmitting the first beam group and the second beam group, and the second transmission regions are used for transmitting the first beam group, the second beam group, and the third beam group.

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