Laser light source device and projection equipment

Abstract

The utility model discloses a laser light source device and projection equipment, the laser light source device comprises a first laser, a second laser and an optical mirror assembly, the optical mirror assembly comprises a first reflector group and a second reflector group, and the number and size of lamp beads on the second laser are larger than those of lamp beads on the first laser; the light emitting direction of the first laser is parallel to the first direction, and the first laser directly faces the first reflector group so as to reflect light emitted by the first laser towards the main axis direction; the light emitting direction of the second laser is parallel to the main axis direction, and the second laser directly faces the second reflector group so as to reflect the light emitted by the second laser towards the main axis direction; wherein the first direction is perpendicular to the main axis direction, and light rays reflected by the first reflecting mirror group towards the main axis direction and light rays reflected by the second reflecting mirror group towards the main axis direction are staggered in the main axis direction. According to the utility model, the ingenious light path design is adopted, so that the effects of brightness, compactness and high contrast are realized.

Description

Technical Field

[0001] This utility model relates to the field of projection equipment technology, and in particular to a laser light source device and projection equipment. Background Technology

[0002] With the development of projection technology, projectors are widely used in home, education, and office settings. Projector light sources can be broadly categorized into laser light sources and LED light sources, with laser light sources gaining wider application due to their advantages in brightness, lifespan, and color gamut. However, due to the coherence of laser light, the optical engine often requires numerous decoherence devices and optical path space, making a compact design of the optical engine impossible. Utility Model Content

[0003] To solve the above-mentioned technical problems, this utility model proposes a laser light source device and projection equipment, which, with its ingenious optical path design, achieves a balance of brightness, compactness, and high contrast.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] In a first aspect, this utility model discloses a laser source device, including a first laser, a second laser, and an optical mirror assembly. The optical mirror assembly includes a first reflector group and a second reflector group. The number and size of the LEDs on the second laser are larger than those on the first laser. The emission direction of the first laser is parallel to a first direction, and the first laser faces the first reflector group to reflect the light emitted by the first laser towards the main axis direction. The emission direction of the second laser is parallel to the main axis direction, and the second laser faces the second reflector group to reflect the light emitted by the second laser towards the main axis direction. The first direction is perpendicular to the main axis direction, and the light reflected by the first reflector group towards the main axis direction and the light reflected by the second reflector group towards the main axis direction are offset from each other in the main axis direction.

[0006] Preferably, the first laser includes two rows of first LED beads of different colors, and the first reflector group includes two first dichroic mirrors. Each row of first LED beads is directly opposite a first dichroic mirror in the first direction, wherein each row of first LED beads is arranged along the main axis direction, and each first dichroic mirror is arranged at intervals along the main axis direction.

[0007] Preferably, at least one row of the first LEDs in the first laser includes LEDs of two different colors.

[0008] Preferably, there are two of each first laser and one of each first mirror group. Each first laser and one of each first mirror group are opposite to each other in the first direction. The two first lasers emit light in opposite directions and are staggered in the first direction. The first mirror groups corresponding to the two first lasers are arranged at intervals in the second direction. The second direction is perpendicular to both the first direction and the main axis direction.

[0009] Preferably, the second laser includes multiple rows of second LEDs, and the second reflector group includes a second dichroic mirror and a polarizing mirror. Each second dichroic mirror and the polarizing mirror are respectively aligned with a row of second LEDs along the main axis direction. Each row of second LEDs is arranged along a first direction, and each second dichroic mirror and the polarizing mirror are spaced apart along the first direction. The second dichroic mirror is used to reflect the light emitted by the corresponding second LED to the polarizing mirror, and the polarizing mirror is used to transmit the light emitted by the corresponding second LED and reflect the light from each second dichroic mirror along the main axis direction. The second direction is perpendicular to both the first direction and the main axis direction.

[0010] Preferably, the second laser includes a row of second LEDs for emitting green light, a row of second LEDs for emitting blue light, and two rows of second LEDs for emitting red light. The optical lens group further includes a half-wave plate, wherein the light-emitting side of one row of second LEDs for emitting red light is provided with the half-wave plate, and one row of second LEDs for emitting red light is directly opposite the polarizing mirror.

[0011] Preferably, the first laser includes two rows of first LED beads of different colors, the length of each row of second LED beads in the second laser is greater than the length of each row of first LED beads in the first laser, and the lengths of the second dichroic mirror and the polarizing mirror are both greater than the length of the first mirror group.

[0012] Preferably, the length of each row of second LEDs in the second laser is greater than or equal to twice the length of each row of first LEDs in the first laser, and the lengths of the second dichroic mirror and the polarizing mirror are both greater than or equal to twice the length of the first mirror group.

[0013] Preferably, the first laser includes at least one row of first LED beads for emitting green light, the second laser includes at least one row of second LED beads for emitting green light, and the optical lens group further includes a diffuser, which is disposed on the light-emitting side of the first LED beads and the second LED beads for emitting green light.

[0014] Secondly, this utility model discloses a projection device, including the laser light source device described in the first aspect and a solid diffuser, a dynamic diffuser, a first compound eye lens, a first relay lens, a cemented lens, a second relay lens, a second compound eye lens, a third relay lens, a fourth relay lens, a prism, a DMD chip, and a projection lens arranged sequentially along the light output path of the laser light source device, wherein the optical mirror assembly is arranged opposite to the solid diffuser.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: In the laser light source device and projection equipment disclosed in this utility model, the second laser with a larger number and size of LED beads is set directly opposite the main axis, while the first laser with a smaller number and size of LED beads is perpendicular to the main axis. Moreover, the light reflected by the first laser and the second laser towards the main axis is staggered in the direction of the main axis, which reduces the complexity of the optical path and avoids the light beam from the second laser with a larger number and size of LED beads being weakened due to passing through too many mirrors. By using the first laser and the second laser in combination, the overall brightness of the laser light source device can be enhanced, which helps to improve the contrast. Furthermore, since they are set perpendicularly to each other, the compactness of the laser light source device can be maximized.

[0016] In a further embodiment, there are two first lasers, which are staggered. This allows the size of the smaller first laser with fewer LEDs in the first direction to be reduced. The two first lasers are also spaced apart in the second direction, and this space can be fully utilized to vertically place the larger second laser with more LEDs. This achieves greater brightness without significantly increasing the overall size of the laser source device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the laser source device disclosed in Embodiment 1 of this utility model;

[0018] Figure 2 yes Figure 1 Side view of the laser source device;

[0019] Figure 3 This is a schematic diagram of the arrangement of the first lamp beads of the first laser in some embodiments;

[0020] Figure 4 This is a schematic diagram of the optical path of the projection device disclosed in Embodiment 2 of this utility model.

[0021] Explanation of icon numbers:

[0022] 100. Laser source device;

[0023] 10. First laser; 10A. First A laser; 10B. First B laser; 11. First LED bead; 11A. First A LED bead; 11B. First B LED bead; 11C. First C LED bead; 11D. First D LED bead; 11D1. First D1 LED bead; 11D2. First D2 LED bead;

[0024] 20. Second laser; 21. Second LED; 21A. Second A LED; 21B. Second B LED; 21C. Second C LED; 21D. Second D LED;

[0025] 31. First dichroic mirror; 31A. First A dichroic mirror; 31B. First B dichroic mirror; 31C. First C dichroic mirror; 31D. First D dichroic mirror;

[0026] 32. Second dichroic mirror; 32A. Second A dichroic mirror; 32B. Second B dichroic mirror; 32C. Second C dichroic mirror;

[0027] 33. Polarizing mirror; 34. Half-wave plate; 35. Diffuser;

[0028] 40. Spindle;

[0029] 201. Solid diffuser; 202. Dynamic diffuser; 301. First compound eye lens; 302. Second compound eye lens; 401. First relay lens; 402. Second relay lens; 403. Third relay lens; 404. Fourth relay lens; 500. Cemented lens; 600. Aperture; 700. Prism; 800. DMD chip; 900. Projection lens. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. It should be emphasized that the following description is merely exemplary and not intended to limit the scope and application of this utility model.

[0031] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as "connected to" another component, it can be directly connected to or indirectly connected to that other component. Furthermore, a connection can be used for both fixing and circuit / signal connectivity.

[0032] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0033] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0034] like Figure 1 and Figure 2 As shown, Embodiment 1 of this utility model discloses a laser source device 100, including a first laser 10, a second laser 20, and an optical mirror assembly. The optical mirror assembly includes a first reflector group and a second reflector group. The first laser 10 is a small laser, and the second laser 20 is a large laser. The number and size of the LEDs in the second laser 20 are larger than those in the first laser 10. The emission direction of the first laser 10 is parallel to the first direction, and the first laser 10 faces the first reflector group to reflect the light emitted by the first laser 10 towards the main axis direction. The main axis direction is parallel to the Z-axis and the main axis 40 of the laser source device 100, and the first direction is parallel to the X-axis. The emission direction of the second laser 20 is parallel to the main axis direction, and the second laser 20 faces the second reflector group to converge the light emitted by each LED in the second laser 20 and reflect it towards the main axis direction. The first direction is perpendicular to the main axis direction, and the light reflected by the first reflector group towards the main axis direction and the light reflected by the second reflector group towards the main axis direction are offset from each other in the main axis direction, that is, the light from the two is separated in the main axis direction.

[0035] In some embodiments, the first laser 10 includes two rows of first LED beads 11 of different colors, and the first reflector group includes two first dichroic mirrors 31. Each row of first LED beads 11 is directly opposite a first dichroic mirror 31 in a first direction. The rows of first LED beads 11 are arranged along the main axis direction, and correspondingly, the first dichroic mirrors 31 in the same first reflector group are arranged at intervals along the main axis direction.

[0036] In a further embodiment, there are two first lasers 10 and two first mirror groups. Each first laser 10 is opposite to a first mirror group in a first direction. The emission directions of the two first lasers 10 are opposite but parallel to the first direction, and the two first lasers 10 are staggered in the first direction, meaning their projections in the first direction do not overlap. The first mirror groups corresponding to the two first lasers 10 are spaced apart in a second direction, which is parallel to the Y-axis and perpendicular to both the first direction and the principal axis. This makes full use of the space in the first direction, allowing the size of the laser source device 100 in the first direction to be reduced.

[0037] Combination Figure 1 and Figure 2 In this specific embodiment, the two first lasers 10 are a first A laser 10A and a first B laser 10B. The emission directions of the first A laser 10A and the first B laser 10B are parallel to the X-axis, but they face opposite directions and are staggered and complementary, that is, they are misaligned and not directly opposite each other in the X-axis direction. The first A laser 10A includes two rows of first LED beads 11, namely, first A LED beads 11A for emitting red light and first B LED beads 11B for emitting green and / or blue light; the first B laser 10B includes two rows of first LED beads 11, namely, first C LED beads 11C for emitting red light and first D LED beads 11D for emitting green and / or blue light; each row of first LED beads 11 on each first laser 10 is arranged along the main axis (Z-axis), and the light emission direction of each row of first LED beads 11 is directly opposite a first dichroic mirror 31. Each first dichroic mirror 31 is used to reflect the light emitted by the corresponding first LED beads 11 towards the main axis direction to the diffuser 35.

[0038] Specifically, the light-emitting side of the first A lamp bead 11A faces the first A dichroic mirror 31A, which reflects red light and transmits green and / or blue light; the light-emitting side of the first B lamp bead 11B faces the first B dichroic mirror 31B, which reflects green and / or blue light; the light-emitting side of the first C lamp bead 11C faces the first C dichroic mirror 31C, which reflects red light and transmits green and / or blue light; and the light-emitting side of the first D lamp bead 11D faces the first D dichroic mirror 31D, which reflects green and / or blue light. The first A-type LED 11A and the first C-type LED 11C used to emit red light are provided with at least three wavelengths of red light LEDs, such as at least red light LEDs with wavelengths of 638nm, 640nm, and 642nm, which can help reduce the coherence of red light and reduce the color spot phenomenon.

[0039] In this embodiment, the first A dichroic mirror 31A, the first B dichroic mirror 31B, the first C dichroic mirror 31C, and the first D dichroic mirror 31D are all located on the side of the main axis 40 close to the first A laser 10A. The first A dichroic mirror 31A and the first B dichroic mirror 31B facing the first A laser 10A are arranged in the Y-axis direction along with the first C dichroic mirror 31C and the first D dichroic mirror 31D facing the first B laser 10B.

[0040] In some embodiments, the second laser 20 includes multiple rows of second LED beads 21, and the second reflector group includes a second dichroic mirror 32 and a polarizing mirror 33. Each second dichroic mirror 32 and polarizing mirror 33 is correspondingly aligned with each row of second LED beads 21 in the main axis direction. Each row of second LED beads 21 is arranged along a first direction. Correspondingly, each second dichroic mirror 32 and polarizing mirror 33 are spaced apart in the first direction. The polarizing mirror 33 and the first reflector group are distributed on opposite sides of the main axis 40 in the first direction. The second dichroic mirror 32 is used to reflect the light emitted by the corresponding second LED bead 21 to the polarizing mirror 33. The polarizing mirror 33 is used to transmit the light emitted by the corresponding second LED bead 21 in the main axis direction and reflect the light from each second dichroic mirror 32 in the main axis direction. The second direction is perpendicular to the first direction and the main axis direction respectively.

[0041] In a further embodiment, the second laser 20 includes a row of second LEDs 21 for emitting green light, a row of second LEDs 21 for emitting blue light, and two rows of second LEDs 21 for emitting red light. The optical lens assembly also includes a half-wave plate 34, wherein the light-emitting side of one row of second LEDs 21 emitting red light is provided with the half-wave plate 34, and one row of second LEDs 21 emitting red light faces the polarizing mirror 33. The red light emitted by the two second LEDs 21 emitting red light has the same polarization direction. The half-wave plate 34 is used to adjust the polarization direction of the transmitted red light to a direction perpendicular to the original polarization direction. The polarizing mirror 33 is used to transmit light with a certain polarization direction and reflect light with a polarization direction perpendicular to it. Therefore, the polarizing mirror 33 can transmit the red light of the second LED 21 corresponding to the principal axis direction and reflect the red light from the other row of second LEDs 21 from the second dichroic mirror 32.

[0042] In a further embodiment, the length of each row of second LED beads 21 in the second laser 20 is greater than the length of each row of first LED beads 11 in the first laser 10, and the lengths of both the second dichroic mirror 32 and the polarizing mirror 33 are greater than the length of the first dichroic mirror 31 to match the light emission range of each second LED bead 21. Furthermore, the length of each row of second LED beads 21 in the second laser 20 is greater than or equal to twice the length of each row of first LED beads 11 in the first laser 10, and the lengths of both the second dichroic mirror 32 and the polarizing mirror 33 are greater than or equal to twice the length of the first dichroic mirror 31. On the optical path section perpendicular to the main axis 40, the light rays from the first dichroic mirror 31 and the light rays from the polarizing mirror 33 are arranged in a first direction, and the beam area of ​​the light rays from the polarizing mirror 33 is greater than or equal to the beam area of ​​the light rays from the first dichroic mirror 31.

[0043] Combination Figure 1 and Figure 2In this specific embodiment, the emission direction of the second laser 20 is parallel to the Z-axis, and it is provided with four rows of second LED beads 21. The size and number of the second LED beads 21 are larger than those of the first LED beads 11 on the first laser 10. This orientation distribution of the large laser (second laser 20) and the small laser (first laser 10) can improve the utilization of space. The second laser 20 includes a row of second A LED beads 21A for emitting green light, a row of second B LED beads 21B for emitting blue light, and a row of second C LED beads 21C and a row of second D LED beads 21D for emitting red light. Moreover, the row of second A LED beads 21A, the row of second B LED beads 21B, the row of second C LED beads 21C, and the row of second D LED beads 21D are arranged sequentially along the X-axis. In this configuration, the light-emitting side of the second A lamp bead 21A faces the second A dichroic mirror 32A, which reflects green light and transmits green light, reflecting the light from the second A lamp bead 21A to the second B dichroic mirror 32B. The light-emitting side of the second B lamp bead 21B faces the second B dichroic mirror 32B, which reflects blue light and transmits green light, reflecting the light from the second B lamp bead 21B to the second C dichroic mirror 32C. The light-emitting side of the second C lamp bead 21C faces the half-wave plate 34 and the second C dichroic mirror 32C. The half-wave plate 34 is used to change the polarization state of the red light passing through it, and the second C dichroic mirror 32C reflects red light and transmits green light. The second D-bead 21D emits green and blue light. Its emitting side faces the polarizing mirror 33. The polarization directions of the light beams from the second A-dichroic mirror 32A, second B-dichroic mirror 32B, and second C-dichroic mirror 32C are perpendicular to the polarization direction of the light beam from the second D-bead 21D. The polarizing mirror 33 can transmit light with a certain polarization direction while reflecting light perpendicular to that polarization direction. Therefore, in this specific embodiment, the polarizing mirror 33 is used to transmit the light emitted by the second D-bead 21D for emitting red light, while reflecting light from the second A-bead 21A, second B-bead 21B, and second C-bead 21C that is perpendicular to the polarization direction of the second D-bead 21D. Thus, the polarization states of the two beams of red light exiting the polarizing mirror 33 are perpendicular to each other, thereby further reducing the overall coherence of the red light while maintaining high brightness.

[0044] In this embodiment, the polarizing mirror 33 is located below the main axis 40, so that the light from the polarizing mirror 33 can pass below the main axis 40 without passing through the first dichroic mirrors 31 above, which reduces the complexity of the optical path and avoids the beam from the large laser (second laser 20) being weakened due to passing through too many mirrors.

[0045] In a further implementation, the optical lens assembly also includes diffusers. Diffusers are added to the light-emitting sides of the first D lamp bead 11D used to emit green light in the first B laser 10B and the row of second A lamp beads 21A used to emit green light in the second laser 20, respectively, to reduce the coherence of the emitted green light.

[0046] Additionally, in some embodiments, at least one row of first LED beads 11 in the first laser 10 includes LED beads of two different colors. For example, as... Figure 3 As shown, the first B laser 10B has five first LEDs 11 in each of its first and second rows. The first row has five first C LEDs 11C for emitting red light, and the second row can have three first D1 LEDs 11D1 for emitting green light and two first D2 LEDs 11D2 for emitting blue light. Correspondingly, in the first A laser 10A, the first row consists entirely of first A LEDs 11A for emitting red light, and the second row consists entirely of first B LEDs 11B for emitting blue light. By setting multiple colors in one row of at least one of the two first lasers 10, the proportion of color components in the final converged beam can be adjusted, providing a more reasonable proportion of green and blue light, thus improving the color gamut and contrast. Otherwise, if the entire light source is the same color, good color gamut adjustment cannot be achieved.

[0047] In summary, the laser source device 100 disclosed in Embodiment 1 of this utility model has the following advantages: First, the two first lasers 10 are staggered, which allows the size of the two small lasers (first A laser 10A and first B laser 10B) in the X-axis direction to be reduced. Second, the large laser (second laser 20) is positioned directly opposite the main axis 40, while the two small lasers (first A laser 10A and first B laser 10B) are perpendicular to the main axis 40. The two small lasers (first A laser 10A and first B laser 10B) have a relatively large spacing in the Y-axis direction, which can be fully utilized to vertically place the large laser (second laser 20), achieving greater brightness without excessively increasing the overall size of the laser source device 100. Third, the introduction of the large laser (second laser 20) can increase the overall brightness of the laser source device 100 and provides a wider selection of the number of LEDs and color ratios, which helps to improve contrast. Fourth, by using the different optical paths of two small lasers (first A laser 10A and first B laser 10B) and a large laser (second laser 20), a phase difference is generated, which reduces laser coherence and speckle fringes.

[0048] like Figure 4As shown, Embodiment 2 of this utility model discloses a projection device, including the laser light source device 100 in Embodiment 1, and a solid diffuser 201, a dynamic diffuser 202, a first compound eye lens 301, a first relay lens 401, a cemented lens 500, a second relay lens 402, a second compound eye lens 302, an aperture 600, a third relay lens 403, a fourth relay lens 404, a prism 700, and a DMD chip 800 arranged sequentially along the light output path of the laser light source device. Finally, the projection is magnified by the projection lens 900 and projected out. The optical mirror assembly is positioned opposite the solid diffuser 300.

[0049] Among them, the solid diffuser 200 and the dynamic diffuser 300 are used to eliminate the coherence of the laser; the first compound eye lens 301 and the second compound eye lens 302 are used to scatter the beam and reduce coherence; the first relay lens 401, the second relay lens 402, the third relay lens 403 and the fourth relay lens 404 are converging lenses used to collimate the beam; the cemented lens 500 is made of quartz material and is used to disrupt the polarization state of the beam and further reduce coherence; the aperture 600 is used to modulate the contrast of the beam.

[0050] The background section of this utility model may include background information about the problems or circumstances surrounding the present utility model, rather than a description of prior art by others. Therefore, the content included in the background section is not an admission of prior art by the applicant.

[0051] The above description, in conjunction with specific / preferred embodiments, provides a further detailed explanation of the present invention and should not be construed as limiting the specific implementation of the present invention to these descriptions. For those skilled in the art, various substitutions or modifications can be made to these described embodiments without departing from the concept of the present invention, and all such substitutions or modifications should be considered within the protection scope of the present invention. In the description of this specification, the reference to terms such as "an embodiment," "some embodiments," "preferred embodiment," "example," "specific example," or "some examples," etc., indicates that the specific features, structures, materials, or characteristics described in connection with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification and the features of different embodiments or examples. Although embodiments of the present invention and their advantages have been described in detail, it should be understood that various changes, substitutions and alterations may be made herein without departing from the scope defined by the appended claims.

Claims

1. A laser light source apparatus, characterized by comprising: The laser device comprises a first laser, a second laser and an optical mirror assembly, the optical mirror assembly comprises a first mirror set and a second mirror set, the number and size of the lamp beads on the second laser are greater than those on the first laser; The light emitting direction of the first laser is parallel to a first direction, and the first laser is directly opposite to the first mirror set to reflect the light emitted by the first laser to the main axis direction; The light emitting direction of the second laser is parallel to the main axis direction, and the second laser is directly opposite to the second mirror set to reflect the light emitted by the second laser to the main axis direction; The first direction and the main axis direction are perpendicular to each other, and the light reflected by the first mirror set to the main axis direction is staggered with the light reflected by the second mirror set to the main axis direction in the main axis direction.

2. The laser light source apparatus according to claim 1, wherein The first laser comprises two rows of first lamp beads with different colors, the first mirror set comprises two first dichroic mirrors, each row of first lamp beads is directly opposite to one first dichroic mirror in the first direction, wherein each row of first lamp beads is arranged along the main axis direction, and each first dichroic mirror is arranged along the main axis direction.

3. The laser light source apparatus according to claim 2, wherein At least one row of first lamp beads in the first laser comprises two different colors of lamp beads.

4. The laser light source apparatus according to claim 1, wherein The number of the first laser and the first mirror set is two, each first laser and the first mirror set are opposite to each other in the first direction, the light emitting directions of the two first lasers are opposite, and the two first lasers are staggered in the first direction, and the first mirror sets corresponding to the two first lasers are arranged in the second direction, the second direction is perpendicular to the first direction and the main axis direction.

5. The laser light source apparatus according to claim 1, wherein The second laser comprises a plurality of rows of second lamp beads, the second mirror set comprises a second dichroic mirror and a polarization mirror, each second dichroic mirror and the polarization mirror are directly opposite to a row of second lamp beads in the main axis direction, each row of second lamp beads is arranged along the first direction, and each second dichroic mirror and the polarization mirror are arranged in the first direction; The second dichroic mirror is used for reflecting the light emitted by the corresponding second lamp bead to the polarization mirror, the polarization mirror is used for transmitting the corresponding second lamp bead, and the light from each second dichroic mirror is reflected along the main axis direction.

6. The laser light source apparatus according to claim 5, wherein The second laser comprises a row of second lamp beads for emitting green light, a row of second lamp beads for emitting blue light and two rows of second lamp beads for emitting red light, and the optical mirror assembly further comprises a half wave plate, one side of a row of second lamp beads for emitting red light is provided with the half wave plate, and one row of second lamp beads for emitting red light is directly opposite to the polarization mirror.

7. The laser light source apparatus according to claim 5, wherein The first laser includes two rows of first lamp beads of different colors, each row of the second lamp beads in the second laser has a length greater than that of each row of the first lamp beads in the first laser, and the length of the second dichroic mirror and the polarized mirror are both greater than that of the first mirror group.

8. The laser light source apparatus according to claim 7, wherein The length of each row of the second lamp beads in the second laser is greater than or equal to twice the length of each row of the first lamp beads in the first laser, and the length of the second dichroic mirror and the polarized mirror are both greater than or equal to twice the length of the first mirror group.

9. The laser light source apparatus according to claim 1, wherein The first laser includes at least one row of first lamp beads for emitting green light, the second laser includes at least one row of second lamp beads for emitting green light, and the optical mirror group further includes a diffusion sheet, which is arranged on the light-emitting side of the first and second lamp beads for emitting green light.

10. A projection apparatus, characterized by, The laser light source device includes the optical mirror group according to any one of claims 1 to 9, and a solid-state diffusion sheet, a dynamic diffusion sheet, a first fly-eye lens, a first relay mirror, a cemented lens, a second relay mirror, a second fly-eye lens, a third relay mirror, a fourth relay mirror, a prism, a DMD chip and a projection lens arranged in sequence along the light-emitting path of the laser light source device, wherein the optical mirror assembly is arranged opposite to the solid-state diffusion sheet.

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