WO2023045882A1 - 激光投影设备 - Google Patents

激光投影设备 Download PDF

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Publication number
WO2023045882A1
WO2023045882A1 PCT/CN2022/119709 CN2022119709W WO2023045882A1 WO 2023045882 A1 WO2023045882 A1 WO 2023045882A1 CN 2022119709 W CN2022119709 W CN 2022119709W WO 2023045882 A1 WO2023045882 A1 WO 2023045882A1
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WO
WIPO (PCT)
Prior art keywords
light
laser
laser beam
area
lens group
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2022/119709
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English (en)
French (fr)
Inventor
王强
李巍
顾晓强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Laser Display Co Ltd
Original Assignee
Qingdao Hisense Laser Display Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN202111135121.3A external-priority patent/CN113777870A/zh
Priority claimed from CN202220643953.XU external-priority patent/CN217034495U/zh
Application filed by Qingdao Hisense Laser Display Co Ltd filed Critical Qingdao Hisense Laser Display Co Ltd
Priority to CN202280060249.4A priority Critical patent/CN118119890A/zh
Publication of WO2023045882A1 publication Critical patent/WO2023045882A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings

Definitions

  • the present disclosure relates to the technical field of laser projection, in particular to a laser projection device.
  • Laser projection technology uses three primary color lasers as the light source, which can truly reproduce the rich and gorgeous colors of the objective world. Because laser projection technology has the characteristics of wide color gamut, long life, high efficiency and low power consumption, it is widely used.
  • a laser projection device in one aspect, includes a light source assembly, an optical machine and a lens.
  • the light source assembly is configured to emit an illumination beam.
  • the light machine is configured to modulate the illumination beam emitted by the light source assembly to obtain a projection beam.
  • the lens is configured to image the projection beam.
  • the light source assembly includes at least one laser, a light combination component and a fluorescent wheel.
  • the at least one laser is configured to emit a laser beam.
  • the light-combining component is located on the light-emitting side of the at least one laser and is arranged obliquely relative to the light-emitting direction of the at least one laser.
  • the light-combining component includes a reflection area and at least one transmission area.
  • the reflective region is configured to reflect the incident laser beam and fluorescent light.
  • the at least one transmissive region is configured to transmit a laser beam emitted by the at least one laser.
  • the fluorescent wheel is located on a side of the light-combining component away from the at least one laser.
  • the fluorescent wheel includes a first zone and a second zone.
  • the first region is configured to diffusely reflect the laser beam transmitted through the at least one transmissive region to the light combining member.
  • the second region is configured to be excited to generate fluorescence under the irradiation of the laser beam transmitted by the at least one transmissive region.
  • the laser beam transmitted by the at least one transmission area illuminates the first area and the second area respectively, and the laser beam reflected by the first area and the laser beam emitted by the second area
  • the fluorescent light is respectively incident on the light-combining components, and is reflected by the light-combining components to the light outlet of the light source assembly.
  • the laser light beam and fluorescent light emitted from the light outlet of the light source assembly constitute the illumination light beam.
  • a laser projection device in another aspect, includes a light source assembly, an optical machine and a lens.
  • the light source assembly is configured to emit an illumination beam.
  • the light machine is configured to modulate the illumination beam emitted by the light source assembly to obtain a projection beam.
  • the lens is configured to image the projection beam.
  • the light source assembly includes a plurality of lasers, a plurality of first lens groups, a light combining component, a second lens group and a fluorescent wheel.
  • the plurality of lasers are configured to emit laser beams.
  • the plurality of first lens groups correspond to the plurality of lasers, and the plurality of first lens groups are configured to converge laser beams emitted by the plurality of lasers.
  • the light-combining component is located on the light-emitting side of the multiple lasers, and is arranged obliquely relative to the light-emitting direction of the multiple lasers.
  • the light-combining component includes a reflection area and a plurality of transmission areas.
  • the reflective region is configured to reflect an incident laser beam.
  • the multiple transmission areas correspond to the multiple first lens groups, and the multiple transmission areas are arranged at intervals.
  • the plurality of transmissive areas are configured to transmit laser beams converged by the plurality of first lens groups.
  • the second lens group is located on a side of the light-combining component away from the plurality of lasers, and the second lens group is configured to converge the laser beams transmitted by the plurality of transmission regions.
  • the positions where the laser beams transmitted by the plurality of transmission areas are irradiated on the second lens group are symmetrical with respect to the optical axis of the second lens group.
  • the fluorescent wheel is located on a side of the second lens group away from the light-combining component.
  • the fluorescent wheel includes a first zone and a second zone.
  • the first zone is configured to reflect the laser beam converged by the second lens group to the second lens group.
  • the second region is configured to be excited to generate fluorescence under the irradiation of the laser beam converged by the second lens group.
  • the laser beam converged by the second lens group illuminates the first area and the second area respectively, and the laser beam reflected by the first area and the laser beam emitted by the second area
  • the fluorescent light is respectively incident on the light combining component through the second lens group, and is reflected to the light outlet of the light source assembly through the light combining component.
  • the laser light beam and fluorescent light emitted from the light outlet of the light source assembly constitute the illumination light beam.
  • FIG. 1 is a structural diagram of a laser projection device according to some embodiments
  • FIG. 2 is a partial structural diagram of a laser projection device according to some embodiments.
  • FIG. 3 is an optical path diagram of a light source assembly, an optical machine and a lens in a laser projection device according to some embodiments;
  • Fig. 4 is another optical path diagram of a light source assembly, an optical engine and a lens in a laser projection device according to some embodiments;
  • FIG. 5 is an arrangement diagram of tiny mirrors in a digital micromirror device according to some embodiments.
  • Fig. 6 is another optical path diagram of a light source assembly, an optical engine and a lens in a laser projection device according to some embodiments;
  • FIG. 7 is a structural diagram of a light source assembly in the related art.
  • Fig. 8 is a structural diagram of another light source assembly in the related art.
  • Figure 9 is a block diagram of a light source assembly according to some embodiments.
  • Fig. 10 is a structural diagram of a light combining component according to some embodiments.
  • Fig. 11 is a structural diagram of another light source assembly according to some embodiments.
  • Fig. 12 is a structural diagram of another light-combining component according to some embodiments.
  • Fig. 13 is a structural diagram of another light-combining component according to some embodiments.
  • Fig. 14 is a structural diagram of another light-combining component according to some embodiments.
  • Fig. 15 is a structural diagram of another light-combining component according to some embodiments.
  • Fig. 16 is a structural diagram of another light source assembly according to some embodiments.
  • Fig. 17 is a structural diagram of another light-combining component according to some embodiments.
  • Figure 18 is a structural diagram of a fluorescent wheel according to some embodiments.
  • Figure 19 is another structural diagram of a fluorescent wheel according to some embodiments.
  • Fig. 20 is a structural diagram of another light source assembly according to some embodiments.
  • Fig. 21 is a structural diagram of a light combining component and a fly-eye lens in a light source module according to some embodiments
  • Fig. 22 is a schematic diagram of a spot formed when a laser beam is irradiated onto a fly-eye lens according to some embodiments
  • Fig. 23 is a structural diagram of another light source assembly according to some embodiments.
  • Fig. 24 is another structural diagram of a light combining component and a fly-eye lens in a light source module according to some embodiments.
  • Fig. 25 is a structural diagram of yet another light source assembly according to some embodiments.
  • first and second are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as “first” and “second” may explicitly or implicitly include one or more of these features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality” means two or more.
  • connection may be used in describing some embodiments to indicate that two or more elements are in direct physical or electrical contact with each other.
  • the term “connected” may also refer to two or more elements that are not in direct contact with each other, but yet still co-operate or interact with each other.
  • the embodiments disclosed herein are not necessarily limited by the context herein.
  • a and/or B includes the following three combinations: A only, B only, and a combination of A and B.
  • parallel As used herein, “parallel”, “perpendicular”, and “equal” include the stated situation and the situation similar to the stated situation, the range of the similar situation is within the acceptable deviation range, wherein the The acceptable deviation ranges are as determined by one of ordinary skill in the art taking into account the measurement in question and errors associated with measurement of the particular quantity (ie, limitations of the measurement system).
  • Fig. 1 is a structural diagram of a laser projection device according to some embodiments.
  • the laser projection device 1 includes a complete casing 40 (only part of the casing 40 is shown in FIG. 1 ), a light source assembly 10 assembled in the casing 40 , an optical engine 20 , and a lens 30 .
  • the light source assembly 10 is configured to provide an illumination beam (laser beam).
  • the optical machine 20 is configured to use an image signal to modulate the illumination beam provided by the light source assembly 10 to obtain a projection beam.
  • the lens 30 is configured to project the projection light beam on a screen or a wall to form an image.
  • the light source assembly 10 , the light engine 20 and the lens 30 are sequentially connected along the light beam propagation direction, and each is wrapped by a corresponding housing.
  • the housings of the light source assembly 10 , the optical engine 20 and the lens 30 support the corresponding optical components and make the optical components meet certain sealing or airtight requirements.
  • Fig. 2 is a partial structural diagram of a laser projection device according to some embodiments.
  • one end of the optical machine 20 is connected to the light source assembly 10 , and the light source assembly 10 and the optical machine 20 are arranged along the outgoing direction of the illumination beam of the laser projection device 1 (refer to the M direction in FIG. 2 ).
  • the other end of the optical machine 20 is connected to the lens 30, and the optical machine 20 and the lens 30 are arranged along the outgoing direction of the projection beam of the laser projection device 1 (refer to the N direction shown in FIG. 2 ).
  • the outgoing direction M of the illuminating light beam is approximately perpendicular to the outgoing direction N of the projection light beam.
  • this connection structure can adapt to the characteristics of the optical path of the reflective light valve in the optical machine 20.
  • the length is beneficial to the structural arrangement of the whole machine. For example, when the light source assembly 10, the optical engine 20 and the lens 30 are arranged in one dimension direction (for example, the M direction), the length of the optical path in this dimension direction will be very long, which is not conducive to the structural arrangement of the whole machine.
  • the reflective light valve will be described later.
  • the light source assembly 10 can sequentially provide the three primary colors of light (other colors can also be added on the basis of the three primary colors of light). Mixed to form white light. Alternatively, the light source assembly 10 can also output the three primary colors of light at the same time, continuously emitting white light.
  • the light source assembly 10 includes a laser capable of emitting laser beams of at least one color, such as red laser beams, blue laser beams or green laser beams.
  • Fig. 3 is an optical path diagram of a light source assembly, an optical machine and a lens in a laser projection device according to some embodiments
  • Fig. 4 is another optical path diagram of a light source assembly, an optical machine and a lens in a laser projection device according to some embodiments.
  • the optical machine 20 includes a light guide 210 , a plane mirror 220 , a lens assembly 230 , a prism assembly 240 and a digital micromirror device (Digital Micromirror Device, DMD) 250 .
  • the light pipe 210 can receive the illumination beam provided by the light source assembly 10, and homogenize the illumination beam.
  • the outlet of the light pipe 210 can be rectangular, so as to have a shaping effect on the light spot.
  • the plane mirror 220 can reflect the illumination beam to the lens assembly 230 .
  • the lens assembly 230 can converge the illumination beam to the prism assembly 240 .
  • the prism assembly 240 reflects the illumination beam to the digital micromirror device 250 , and the digital micromirror device 250 modulates the illumination beam to obtain a projection beam, and reflects the projection beam to the lens 30 .
  • the light pipe 210 may also be replaced by a fly-eye lens or other components with a uniform light function, which is not limited in the present disclosure.
  • light pipe 210 includes a first light pipe or a second light pipe.
  • the first light pipe is a tubular device spliced by four planar reflectors, and the inside of the first light pipe is hollow.
  • the laser beam is reflected multiple times inside the first light guide, thereby being homogenized.
  • the second light guide can be made of quartz material, and the second light guide transmits and homogenizes the laser beam by causing total reflection of the laser beam inside the second light guide.
  • the digital micromirror device 250 uses the image signal to modulate the illumination beam provided by the light source assembly 10, that is, to control the projection beam to display different brightness and gray scale for different pixels of the image to be displayed, so as to finally form an optical image , so the digital micromirror device 250 is also called a light modulation device or a light valve.
  • the light modulation device or light valve
  • the light modulation device can be classified into a transmissive light modulation device or a reflective light modulation device.
  • the digital micromirror device 250 shown in FIG. 4 reflects the illumination light beam, which is a reflective light modulation device.
  • the liquid crystal light valve transmits the illumination beam, so it is a transmissive light modulation device.
  • the optical machine 20 can be divided into a single-chip system, a two-chip system or a three-chip system.
  • the light modulation device in some embodiments of the present disclosure is a digital micromirror device 250 .
  • FIG. 5 is an arrangement diagram of tiny reflective mirrors in a digital micromirror device according to some embodiments.
  • the digital micromirror device 250 comprises thousands of tiny reflective mirrors 2501 that can be individually driven to rotate.
  • the lens 2501) corresponds to a pixel in the projected image to be displayed.
  • the image signal can be converted into digital codes such as 0 and 1 after being processed, and the tiny mirror 2501 can swing in response to these digital codes. Controlling the duration of each tiny reflective mirror 2501 in the on state and the off state respectively, to realize the gray scale of each pixel in a frame of image. In this way, the digital micromirror device 250 can modulate the illuminating light beam, and then realize the display of the projected picture.
  • the open state of the tiny reflective mirror 2501 is the state where the tiny reflective mirror 2501 is and can be maintained when the illumination beam emitted by the light source assembly 10 can enter the lens 30 after being reflected by the tiny reflective mirror 2501 .
  • the closed state of the tiny reflective mirror 2501 is the state where the tiny reflective mirror 2501 is and can be maintained when the illumination light beam emitted by the light source assembly 10 is reflected by the tiny reflective mirror 2501 and does not enter the lens 30 .
  • Fig. 6 is another optical path diagram of a light source assembly, an optical engine and a lens in a laser projection device according to some embodiments.
  • the lens 30 includes a multi-lens combination, which is usually divided into groups, and is divided into three sections of the front group, the middle group and the rear group, or two sections of the front group and the rear group.
  • the front group is the lens group near the light-emitting side of the laser projection device 1 (that is, the side of the lens 30 away from the optical machine 20 along the N direction in FIG.
  • the lens 30 is a lens group near the side of the optical engine 20 along the opposite direction of the N direction).
  • the lens 30 may be a zoom lens, or a fixed focus adjustable focus lens, or a fixed focus lens.
  • some embodiments of the present disclosure are mainly described by taking the light source assembly 10 sequentially outputting three primary colors of light and the light modulation device in the optical machine 20 as an example of a digital micromirror device 250 for illustration. limits.
  • Fig. 7 is a structural diagram of a light source assembly in the related art.
  • Fig. 8 is a structural diagram of another light source assembly in the related art.
  • the light source assembly 10 ′ includes a laser 101 ′, a light combination assembly 103 ′, and a fluorescent wheel 105 ′.
  • the laser 101' is configured to emit a laser beam.
  • the light-combining component 103' includes a light-combining lens 1031' and a reflective lens 1032'.
  • the light-combining lens 1031' is configured to transmit the laser beam emitted by the laser 101' to the fluorescent wheel 105', and reflect the fluorescent light emitted by the fluorescent wheel 105'.
  • the reflective lens 1032' is located on the side of the light-combining lens 1031' away from the fluorescent wheel 105', and is configured to reflect the laser beam reflected by the fluorescent wheel 105'.
  • the fluorescent wheel 105' is configured to reflect the laser beam transmitted by the light-combining lens 1031', and under the irradiation of the laser beam transmitted by the light-combining lens 1031', be excited by the laser beam to emit fluorescence.
  • the fluorescent light emitted by the fluorescent wheel 105' and the reflected laser beam are incident on the light-combining lens 1031'.
  • the light-combining lens 1031' reflects the fluorescent light to the light outlet 109' of the light source assembly 10', and transmits the laser beam reflected by the fluorescent wheel 105' to the reflective lens 1032'.
  • the reflective lens 1032' reflects the laser beam transmitted by the light-combining lens 1031' to the light-combining lens 1031' again, and the laser beam reflected by the reflecting lens 1032' passes through the light-combining lens 1031' for the third time and enters the light source assembly 10 'The light outlet 109'.
  • the laser beam emitted by the laser 101' passes through the light-combining lens 1031' three times.
  • the light transmittance of the light-combining lens 1031' is about 96%-97%.
  • the transmittance of the light-combining lens 1031' to the laser beam is about (96%) 3 ⁇ 88%, resulting in high optical loss of the light source assembly 10'.
  • the fluorescent wheel 105' includes a laser transmission area
  • the light combination assembly 103' only includes a light combination lens 1031'
  • at least three reflective lenses 1001', 1002' and 1003' to reflect the laser beam passing through the laser transmission area of the fluorescent wheel 105' to the light outlet 109' of the light source assembly 10'.
  • the use of the relay circuit will increase the optical elements of the light source assembly 10 ′, which is not conducive to the miniaturization of the light source assembly 10 ′.
  • Some embodiments of the present disclosure provide a light source assembly 10 .
  • the light source assembly 10 solves the above-mentioned problems by providing a light-combining component 103 with a reflective area 1031 and a transmissive area 1032 .
  • the light combination member 103 having the reflective area 1031 and the transmissive area 1032 will be described later.
  • Fig. 9 is a structural diagram of a light source assembly according to some embodiments
  • Fig. 10 is a structural diagram of a light combining component according to some embodiments.
  • the light source assembly 10 includes a laser 101 , a light combining component 103 and a fluorescent wheel 105 .
  • the laser 101 , the light-combining component 103 and the fluorescent wheel 105 are arranged in sequence along the second direction Y.
  • the laser 101 is configured to emit a laser beam.
  • laser 101 may emit a blue laser beam.
  • FIG. 9 only uses an example in which the light source assembly 10 includes one laser 101 for illustration. Of course, the light source assembly 10 may also include multiple lasers 101 .
  • the light-combining component 103 is located on the light-emitting side of the laser 101 and is arranged obliquely relative to the light-emitting direction of the laser 101 (eg, the second direction Y in FIG. 9 ).
  • the included angle ⁇ between the light emitting direction of the laser 101 and the light combining component 103 is an acute angle.
  • the light combining component 103 can reflect the incident laser beam and fluorescent light along the first direction X.
  • the present disclosure is described by taking the first direction X perpendicular to the second direction Y as an example, of course, some embodiments of the present disclosure are not limited thereto.
  • the included angle between the first direction X and the second direction Y may also be an obtuse angle or an acute angle.
  • the included angle ⁇ between the light-combining component 103 and the light-emitting direction of the laser 101 is 45°, so that the fluorescent wheel 105 is arranged around the light-combining component 103, and the fluorescence from the fluorescent wheel 105 and the The laser beam is reflected to the light outlet 109 of the light source assembly 10 .
  • the light combination component 103 includes a reflection area 1031 and a transmission area 1032 .
  • the reflective area 1031 is configured to reflect incident laser beams and fluorescent light.
  • the transmissive area 1032 is configured to transmit the laser beam emitted by the laser 101 .
  • the reflective area 1031 may also reflect light (laser beam or fluorescence) with a color different from the laser beam and fluorescence, which is not limited in the present disclosure.
  • the shape of the transmissive region 1032 is the same as the shape of the spot of the laser beam emitted by the laser 101 on the light combining component 103 . In this way, the size of the transmission area 1032 can be reduced to the greatest extent without affecting the transmission of the laser beam emitted by the laser 101 through the transmission area 1032 .
  • the area of the reflective area 1031 is larger than that of the transmissive area 1032 , so that the reflective area 1031 reflects the laser beam reflected by the fluorescent wheel 105 and the fluorescence emitted by the fluorescent wheel 105 .
  • the transmissive region 1032 is further configured to reflect fluorescent light having a color different from that of the laser beam emitted by the laser 101 .
  • the light combining component 103 includes a transmissive portion 1033 located in the transmissive region 1032 .
  • the transmissive part 1033 is configured to transmit the laser beam emitted by the laser 101 and reflect the fluorescence emitted by the fluorescent wheel 105 .
  • the transmission part 1033 is a dichroic mirror (Dichroic Mirror), when the laser 101 emits a blue laser beam, and the fluorescent wheel 105 emits red fluorescence and green fluorescence, the dichroic mirror can transmit the blue laser beam, and Reflects red and green fluorescence. In this way, the utilization rate of the fluorescent light can be improved, and a part of the fluorescent light can be prevented from passing through the transmissive region 1032, resulting in light loss.
  • Dichroic Mirror dichroic mirror
  • the light combining component 103 includes a reflection part 1034 , and the reflection part (such as a mirror) 1034 is located in the reflection area 1031 .
  • the reflection part 1034 is configured to reflect the fluorescence emitted by the fluorescent wheel 105 and the laser beam reflected by the fluorescent wheel 105 . It should be noted that the reflection part 1034 can be fixedly connected with the transmission part 1033 .
  • the laser beam emitted by the laser 101 passes through the transmissive part 1033 in the transmissive area 1032 and irradiates onto the fluorescent wheel 105 .
  • the laser beam emitted by the laser 101 is reflected by the fluorescent wheel 105 to the light-combining component 103 , and then reflected by the reflector 1034 to the light outlet 109 of the light source assembly 10 .
  • the fluorescent light excited by the fluorescent wheel 105 enters the light-combining component 103 , and is reflected to the light outlet 109 of the light source assembly 10 through the reflective portion 1034 and the transmissive portion 1033 , so as to enter the light machine 20 as the illumination beam of the light source assembly 10 .
  • Fig. 11 is a structural diagram of another light source assembly according to some embodiments. Compared with FIG. 9 and FIG. 10, the shapes of the reflective part 1034 and the transmissive part 1033 in FIG. 11 are changed.
  • the reflective portion 1034 includes a reflective surface 1035 , which is a surface of the reflective portion 1034 opposite to the fluorescent wheel 105 , and the reflective surface 1035 is a curved surface.
  • the reflective surface 1035 is configured to converge the fluorescent light and the laser beam from the fluorescent wheel 105 and reflect the fluorescent light and the laser beam to the light outlet 109 of the light source assembly 10 .
  • the reflective surface 1035 may be a ruled surface, or a curved surface.
  • the ruled curved reflective surface can converge the incident laser beam or fluorescent light in a direction of one dimension (such as a direction parallel to the second direction Y).
  • a curved reflective surface can focus an incident laser beam or fluorescent light in two dimensions.
  • a ruled surface refers to a curved surface where at least one straight line passes through any point on the curved surface, such as a cylindrical surface.
  • a curved surface refers to a curved surface whose generatrix is a curve, such as a spherical surface.
  • the transmissive part 1033 includes a cylindrical lens 1036 (Cylindrical Lens), and the cylindrical lens 1036 is located in the transmissive area 1032.
  • the cylindrical lens 1036 is fixedly connected with the reflection part 1034 and configured to transmit the laser beam emitted by the laser 101 .
  • the central axis of the cylindrical lens 1036 is parallel to the second direction Y.
  • the laser beam emitted by the laser 101 can be vertically incident on the cylindrical lens 1036 , and then vertically incident on the fluorescent wheel 105 after passing through the cylindrical lens 1036 .
  • the cylindrical lens 1036 can also be replaced by lenses of other shapes, as long as the laser beam emitted by the laser 101 can be vertically incident on the fluorescent wheel 105 after passing through the transmission part 1033 .
  • the foregoing mainly takes the light-combining component 103 as a separate part as an example for illustration.
  • the light-combining component 103 may also be a single piece.
  • Fig. 12 is a structural diagram of another light combining component according to some embodiments.
  • Fig. 13 is a structural diagram of another light combining component according to some embodiments.
  • the light-combining component 103 in FIG. 12 and FIG. 13 is one piece.
  • the light combining component 103 includes a first substrate 1030 , a dichroic film 1037 and a reflective film 1038 .
  • the first substrate 1030 may be a transparent substrate.
  • the dichroic film 1037 and the reflective film 1038 are respectively disposed on the first substrate 1030 , and the dichroic film 1037 is located in the transmissive area 1032 , and the reflective film 1038 is located in the reflective area 1031 .
  • the reflective film 1038 is configured to reflect incident fluorescent and laser beams.
  • the reflective film 1038 can reflect laser beams and fluorescent lights in a full range.
  • the dichroic film 1037 is configured to transmit the laser beam emitted by the laser 101 and reflect the fluorescence emitted by the fluorescent wheel 105 . In this way, the light-combining component 103 can have both transmission and reflection functions. It should be noted that the dichroic film 1037 can also reflect fluorescent light of other colors, or a laser beam of a color different from the laser beam emitted by the laser 101 .
  • the light combining component 103 further includes a through hole 1039 .
  • the through hole 1039 is disposed on the first substrate 1030 , and the through hole 1039 is located in the transmission region 1032 .
  • the through hole 1039 is configured to transmit the laser beam emitted by the laser 101 .
  • the light-combining component 103 can have two functions of transmission and reflection, and the dichroic film 1037 can be omitted, saving the material of the light-combining component 103 and simplifying the manufacturing process of the light-combining component 103 .
  • the transmission area 1032 can transmit laser beams and fluorescent light in a full wavelength range.
  • the light combining component 103 may not include the through hole 1039, as long as the part of the first substrate 1030 located in the transmissive area 1032 is a transparent substrate and can transmit laser beams and fluorescent light in a full band.
  • Fig. 14 is a structural diagram of another light combining component according to some embodiments
  • Fig. 15 is a structural diagram of another light combining component according to some embodiments.
  • an anti-reflection film 1040 is added in FIG. 14 and FIG. 15 .
  • the light combining component further includes an anti-reflection film 1040 .
  • the anti-reflection film 1040 is disposed on the surface of the light-combining component 103 close to the laser 101 , and the anti-reflection film 1040 is configured to increase the transmittance of the light-combining component 103 to the laser beam.
  • the anti-reflection coating 1040 only increases the transmittance of the laser beam (such as the blue laser beam) emitted by the laser 101 ; or, the anti-reflection film 1040 can increase the transmittance of the laser beam and fluorescent light in all bands.
  • the anti-reflection film 1040 is disposed on the surface of the light-combining component 103 close to the laser 101 and covers the surface.
  • the anti-reflection film 1040 may also be provided only on the surface of the light-combining component 103 located in the transmission region 1032 . In this way, the loss of the laser beam can be reduced, and the utilization rate of the laser beam can be improved.
  • the light combination component 103 further includes a light diffusion structure.
  • the light diffusion structure is disposed on the surface of the light combining component 103 close to the laser 101 .
  • the light diffusion structure is a diffusion sheet, or the light diffusion structure is a structure composed of a plurality of microprisms (such as trapezoidal prisms, triangular prisms, or rectangular prisms, etc.), or the light diffusion structure is a plurality of parallel microprisms.
  • the light diffusing structure is configured to diffuse the laser beam incident on the light combining component 103 to improve the uniformity of the laser beam passing through the light combining component 103 . In this way, after the laser beam irradiates the fluorescent wheel 105, the energy distribution of the fluorescent light excited by the fluorescent wheel 105 is relatively uniform.
  • the light combining component 103 only includes one transmissive region 1032 .
  • the transmissive area 1032 is located at the center of the light-combining component 103
  • the reflective area 1031 is disposed around the transmissive area 1032 .
  • the light combining component 103 in some embodiments of the present disclosure is not limited thereto.
  • the light-combining component 103 may further include a plurality of transmissive regions 1032, and the plurality of transmissive regions 1032 are arranged at intervals.
  • Fig. 16 is a structural diagram of yet another light source assembly according to some embodiments.
  • Fig. 17 is a structural diagram of another light combining component according to some embodiments.
  • the number of transmissive regions 1032 is increased in FIGS. 16 and 17 .
  • the plurality of transmissive regions 1032 include a first transmissive region 1032A and a second transmissive region 1032B.
  • the reflective area 1031 is located between the first transmissive area 1032A and the second transmissive area 1032B, and the first transmissive area 1032A is located on the side of the reflective area 1031 close to the laser 101, and the second transmissive area 1032B is located on the side of the reflective area 1031 away from the laser 101 side.
  • the structures and functions of the plurality of transmissive regions 1032 are the same as those of the transmissive regions 1032 , and will not be repeated here.
  • the light combining component 103 may include a plurality of transmissive portions 1033 , or a plurality of dichroic films 1037 or a plurality of through holes 1039 .
  • the light combining component 103 includes two transmissive parts 1033, and the two transmissive parts 1033 are respectively located in the first transmissive area 1032A and the second transmissive area 1032B.
  • the light combining component 103 includes a first substrate 1030 , a reflective film 1038 and two dichroic films 1037 on the first substrate 1030 .
  • the two dichroic films 1037 are respectively located in the first transmission area 1032A and the second transmission area 1032B, and the reflection film 1038 is located in the reflection area 1031 .
  • the light combining component 103 includes a first substrate 1030 , a reflective film 1038 and two through holes 1039 on the first substrate 1030 .
  • the two through holes 1039 are respectively located in the first transmissive area 1032A and the second transmissive area 1032B, and the reflective film 1038 is located in the reflective area 1031 .
  • the light source assembly 10 further includes a turning mirror group 107 .
  • the turning mirror group 107 is located between the light-combining component 103 and the laser 101, and is configured to split the laser beam emitted by the laser 101, so as to divide the laser beam into multiple laser beams, and make the multiple laser beams and A plurality of transmissive regions 1032 correspond.
  • the turning mirror group 107 includes a first mirror group 1071 and a second mirror group 1072 .
  • the first mirror group 1071 and the second mirror group 1072 respectively reflect the laser beam emitted by the laser 101 to the first transmission area 1032A and the second transmission area 1032B.
  • the laser 101 includes a plurality of laser chips arranged in an array, and each laser chip can emit a laser beam.
  • the first reflection mirror group 1071 includes a first reflection mirror 1071A and a second reflection mirror 1071B.
  • the first reflection mirror 1071A reflects the laser beams emitted by part of the laser chip in the laser 101 to the second reflection mirror 1071B, and the second reflection mirror 1071B
  • the incident laser beam is reflected to the first transmission area 1032A.
  • the second reflecting mirror group 1072 includes a third reflecting mirror 1072A and a fourth reflecting mirror 1072B.
  • the third reflecting mirror 1072A reflects the laser beam emitted by another part of the laser chip in the laser 101 to the fourth reflecting mirror 1072B, and the fourth reflecting mirror 1072B
  • the incident laser beam is reflected to the second transmissive area 1032B.
  • the laser beam emitted by the laser 101 can be split into two laser beams to respectively enter the first transmission area 1032A and the second transmission area 1032B.
  • the light source assembly 10 in some embodiments of the present disclosure is not limited thereto.
  • the light source assembly 10 may also include a plurality of lasers 101 corresponding to the plurality of transmission areas 1032 , so that the multiple laser beams emitted by the plurality of lasers 101 can respectively enter the plurality of transmission areas 1032 .
  • FIG. 18 is a structural diagram of a fluorescent wheel according to some embodiments
  • FIG. 19 is another structural diagram of a fluorescent wheel according to some embodiments.
  • the fluorescent wheel 105 is located on the side of the light-combining component 103 away from the laser 101 , and the fluorescent wheel 105 is configured to reflect the laser beam transmitted by the light-combining component 103 and stimulated to fluoresce under irradiation.
  • the fluorescent wheel 105 includes a first region 1051 and a second region 1052 .
  • the first area 1051 is configured to reflect the laser beam transmitted by the light combining part 103 .
  • the second region 1052 is configured to be excited to emit fluorescence under the irradiation of the laser beam transmitted by the light combining part 103 . It should be noted that the color of the fluorescence generated by the fluorescent wheel 105 is different from the color of the laser beam emitted by the laser 101 .
  • the light source assembly 10 further includes a rotation axis Z.
  • the fluorescent wheel 105 can rotate around the rotation axis Z.
  • the fluorescent wheel 105 can rotate around the rotation axis Z in the W direction or in the direction opposite to the W direction.
  • the laser beam emitted by the laser 101 can be irradiated on different areas (such as the first area 1051 and the second area 1052 ) in the fluorescent wheel 105 after passing through the transmission area 1032 .
  • the first area 1051 reflects the laser beam
  • the laser beam reflected by the first area 1051 is incident on the reflection area of the light combining member 103 1031.
  • the second area 1052 is excited by the laser beam to emit fluorescence, and the fluorescence enters the reflection area 1031 of the light combining component 103 .
  • the reflection area 1031 of the light-combining component 103 reflects the incident laser beam and fluorescent light to the light outlet 109 of the light source assembly 10 along the first direction X.
  • the side of the fluorescent wheel 105 away from the light-combining component 103 is opaque.
  • the fluorescence is emitted in various directions in the form of a Lambertian body.
  • the emission angle of the fluorescent light emitted by the second area 1052 can be roughly in the range of 0°-180°.
  • the Lambertian body may refer to a luminous body that can emit light isotropically around.
  • fluorescent wheel 105 includes a reflective material and at least one fluorescent material.
  • the reflective material is located in the first area 1051 and can reflect the incident laser beam.
  • the fluorescent material is located in the second area 1052, and the fluorescent material can be excited to emit fluorescence under the irradiation of the laser beam.
  • the fluorescent wheel 105 includes a second substrate 1050 , a first reflective layer 1053 and a fluorescent material layer 1054 .
  • the first reflective layer 1053 and the fluorescent material layer 1054 are respectively arranged on the surface of the second substrate 1050 close to the light-combining component 103, and the first reflective layer 1053 is located in the first area 1051 of the fluorescent wheel 105, and the fluorescent material layer 1054 is located in the fluorescent wheel 1052 of the second district.
  • the second substrate 1050 may be a transparent substrate or a reflective substrate. In the case that the second substrate 1050 is a reflective substrate, the surface of the second substrate 1050 located in the first region 1051 may not be provided with any material layer (such as the first reflective layer 1053 ). It should be noted that the fluorescent material layer 1054 of one color can be excited to emit fluorescence of this color.
  • the laser beam When the laser beam is incident on the first area 1051 , the laser beam can be reflected by the first reflective layer 1053 . When the laser beam is incident on the second region 1052, the laser beam can excite the fluorescent material layer 1054 to emit fluorescent light of a corresponding color.
  • the first reflective layer 1053 is made of a diffuse reflective material.
  • the diffuse reflective material can diffusely reflect the laser beam transmitted by the transmissive area 1032 to the light-combining component 103 to homogenize the incident laser beam.
  • the fluorescent material layer 1054 uses a green fluorescent material, or the fluorescent material layer 1054 may also use at least one of a red fluorescent material or a yellow fluorescent material. In this way, the second region 1052 can emit green fluorescence, red fluorescence or fluorescence of other colors (such as yellow fluorescence).
  • the second area 1052 includes at least one sub-fluorescent area, and each sub-fluorescent area is provided with a fluorescent material layer of one color.
  • the second area 1052 includes a plurality of sub fluorescent areas
  • the plurality of sub fluorescent areas and the first area 1051 can be arranged in a circle around the rotation axis Z.
  • the second region 1052 includes a first sub-fluorescent region 1052A and a second sub-fluorescent region 1052B.
  • the fluorescent material layer 1054 may use any two of green fluorescent material, yellow fluorescent material or red fluorescent material. Fluorescent material layers 1054 using different fluorescent materials are respectively located in the first sub-fluorescent region 1052A and the second sub-fluorescent region 1052B.
  • the area of the plurality of fluorescent sub-regions in the second region 1052 is equal, and the area of the first region 1051 is also equal to the area of any sub-fluorescent region.
  • the areas of the plurality of sub-fluorescent regions and the first region 1051 can also be different, and the areas of the plurality of sub-fluorescent regions and the first region 1051 can be designed according to the proportion of the corresponding color of the laser beam or fluorescent light in the desired white light. .
  • the first sub-fluorescent area 1052A uses a red fluorescent material
  • the second sub-fluorescent area 1052B uses a green fluorescent material
  • the rotational speed of the fluorescent wheel 105 is constant
  • the blue laser beam , red fluorescence and green fluorescence can be mixed in a ratio of 1:2:1 to obtain white light
  • the area of the first region 1051 is equal to the area of the second sub-fluorescence region 1052B
  • the area of the second sub-fluorescence region 1052B is the first half of the area of the sub fluorescent area 1052A.
  • the color of the laser beam emitted by the laser 101 and the fluorescence excited by the fluorescent wheel 105 may also be other colors, which are not limited in the present disclosure.
  • the fluorescent wheel 105 further includes a second reflective layer 1055 .
  • the second reflective layer 1055 is located in the second region 1052 and disposed between the fluorescent material layer 1054 and the second substrate 1050 .
  • the second reflective layer 1055 is configured to reflect the fluorescence emitted by the fluorescent material layer 1054 . Since the fluorescent light is emitted in the form of a Lambertian body with a luminous angle of 360°, by arranging the second reflective layer 1055 on one side of the fluorescent material layer 1054, the fluorescent light emitted toward the direction close to the second substrate 1050 can be reflected, thereby improving the fluorescence intensity. Utilization, improve the brightness of fluorescence.
  • the laser beam emitted by the laser 101 only passes through the transmission area 1032 of the light-combining component 103 once, which can reduce the The number of times the laser beam emitted by the laser 101 passes through the light-combining component 103 reduces the optical loss of the laser beam and improves the utilization rate of the laser beam in the light source assembly 10 .
  • the light-combining component 103 including the transmissive area 1032 and the reflective area 1031 no additional relay circuit system is required, so that the light source assembly 10 has fewer optical elements and a compact optical path structure, which not only can achieve higher luminous power, but also facilitates Miniaturization of the light source module 10 .
  • the light source assembly 10 further includes a first lens group 102 .
  • the first lens group 102 is located between the laser 101 and the light combining component 103 , and the first lens group 102 is configured to reduce the spot of the laser beam emitted from the laser 101 .
  • the first lens group 102 can make the beam of the laser beam exiting the first lens group 102 thinner than the beam of the laser beam entering the first lens group 102 .
  • the size of the transmissive area 1032 in the light-combining component 103 can be smaller, which is conducive to reducing the volume of the light-combining component 103, or, when the size of the light-combining component 103 is constant, the size of the light-combining component 103
  • the size of the reflective area 1031 can be larger, so that the reflective area 1031 can reflect more fluorescent light and laser beams, thereby improving the utilization rate of fluorescent light and laser light beams.
  • the first lens group 102 includes a convex lens 102A and a concave lens 102B.
  • the convex lens 102A and the concave lens 102B are arranged in sequence along the second direction Y. In this way, the first lens group 102 can first converge the laser beam emitted by the laser 101 and then diverge, so that the laser beam incident on the transmission area 1032 is parallel to the light emitting direction of the laser 101 .
  • the light source assembly 10 further includes a second lens group 104 .
  • the second lens group 104 is located between the light combining component 103 and the fluorescent wheel 105 .
  • the second lens group 104 is configured to converge the incident laser beam to the fluorescent wheel 105 , and collimate the laser beam reflected by the fluorescent wheel 105 and the fluorescence emitted by the fluorescent wheel 105 .
  • the second lens group 104 includes a third sub-lens 1041 and a fourth sub-lens 1042 .
  • the third sub-lens 1041 (such as spherical convex lens or aspheric convex lens) and the fourth sub-lens 1042 (such as spherical convex lens or aspheric convex lens) are arranged along the same optical axis and arranged in sequence along the second direction Y.
  • the second lens group 104 can collimate the laser beam reflected by the fluorescent wheel 105 and the fluorescence emitted by the fluorescent wheel 105, the laser beam and fluorescent light emitted by the fluorescent wheel 105 are collimated by the second lens group 104 in a form similar to a Lambertian body. After being straightened, it can exit the second lens group 104 in the form of parallel light and enter the light combination component 103 .
  • the laser beams and fluorescent light incident on the light-combining member 103 may not only enter the reflection area 1031 , but may also enter the transmission area 1032 .
  • the above-mentioned transmissive part 1033 or dichroic film 1037 disposed in the transmissive region 1032 can reflect the fluorescent light incident on the transmissive region 1032 , thereby improving the utilization rate of the fluorescent light.
  • the light source assembly 10 further includes a third lens group 108 .
  • the light-combining component 103 and the third lens group 108 are arranged in sequence along the first direction X, and the third lens group 108 is configured to converge the laser beam and the fluorescent light reflected by the optical component 103 , and pass the converged laser beam and fluorescent light through
  • the light outlet 109 of the light source assembly 10 is incident to the light guide 210 .
  • FIG. 16 uses an example in which the third lens group 108 includes one lens for illustration. Certainly, the third lens group 108 may also include multiple lenses.
  • Fig. 20 is a structural diagram of another light source assembly according to some embodiments
  • Fig. 21 is a structural diagram of a light combining component and a fly-eye lens in a light source assembly according to some embodiments
  • Fig. 22 is a schematic diagram of a light spot formed when a laser beam is irradiated onto a fly-eye lens according to some embodiments. Compared with FIG. 9 , a fly-eye lens 106 is added in FIG. 20 .
  • the light source assembly 10 further includes a fly-eye lens 106 .
  • the fly-eye lens 106 is disposed on the light-combining component 103 and located in the transmissive area 1032 of the light-combining component 103 .
  • the fly-eye lens 106 is configured to homogenize and shape the laser beam emitted by the laser 101 .
  • the fly-eye lens 106 includes a substrate 1061 and a plurality of micro-lenses (Micro-lens) 1062 .
  • the substrate 1061 may be a glass substrate.
  • a plurality of microlenses 1062 are disposed on the substrate 1061 and arranged in an array.
  • the surface of the microlens 1062 away from the substrate 1061 is a curved surface.
  • the length ratio of the two adjacent sides of the orthographic projection of the curved surface on the substrate 1061 is a preset value, so that the light spot of the laser beam shaped by the plurality of microlenses 1062 is consistent with the shape of the light entrance of the light guide 210. match.
  • the spot R of a laser beam emitted by the laser 101 is elliptical.
  • the position of the laser 101 is different, the position of the light spot R on the fly-eye lens 106 irradiated by the laser beam emitted by the laser 101 is also different.
  • the direction of the major axis L of the elliptical light spot R changes. It should be noted that the major axis L refers to the longest line segment that can be obtained by connecting any two points on the edge of the elliptical light spot R.
  • the microlens 1062 may be a plano-convex lens.
  • the surface of the plano-convex lens close to the substrate 1061 is a plane, and the surface of the plano-convex lens away from the substrate 1061 is a curved surface.
  • the orthographic projection of the curved surface on the substrate 1061 is a rectangle.
  • the plurality of microlenses 1062 can divide the spot R of the incident laser beam into multiple rectangular spots, and the second lens group 104 will converge the multiple rectangular spots into one rectangular spot, and irradiate the light-receiving surface of the fluorescent wheel 105 1056, to homogenize and shape the laser beam emitted by the laser 101, so that the shape of the laser beam emitted from the light source assembly 10 and the spot of the fluorescence is consistent with the shape of the light entrance of the light guide 210 in the optical machine 20 (such as the light guide 210 The light entrance is rectangular) to match.
  • the microlens 1062 in the fly-eye lens 106 may also be a spherical convex lens or an aspherical convex lens. It should be noted that, in the case that the light combining component 103 includes a reflective portion 1034 located in the reflective area 1031 , the reflective portion 1034 can be fixedly connected to the fly-eye lens 106 . Of course, as shown in FIG. 11 , the fly-eye lens 106 can also be arranged on the cylindrical lens 1036 .
  • the light source assembly 10 may also include a plurality of fly-eye lenses 106 , and the plurality of fly-eye lenses 106 correspond to the plurality of transmissive regions 1032 .
  • Fig. 23 is a structural diagram of another light source assembly according to some embodiments
  • Fig. 24 is another structural diagram of light combining components and fly-eye lenses in a light source assembly according to some embodiments. Compared with FIG. 16 , a fly-eye lens 106 is added in FIG. 23 .
  • the light source assembly 10 includes two fly-eye lenses 106 , and the two fly-eye lenses 106 are respectively located in the first transmission area 1032A and the second transmission area 1032B.
  • the light combining member 103 may further include a reflective portion 1034 .
  • the reflection portion 1034 is located in the reflection area 1031 .
  • the reflection part 1034 can be fixedly connected with the two fly-eye lenses 106 .
  • the foregoing description mainly takes the laser beam incident on the transmissive area 1032 as an approximately parallel laser beam as an example.
  • the first lens group 102 can converge the laser beam emitted by the laser 101 to the transmission area 1032 .
  • Fig. 25 is a structural diagram of yet another light source assembly according to some embodiments. Compared with FIG. 9 and FIG. 16 , the spot of the laser beam incident on the transmission area 1032 in FIG. 25 is smaller.
  • the light source assembly 10 further includes multiple lasers 101 and multiple first lens groups 102 .
  • a plurality of lasers 101 , a plurality of first lens groups 102 , a light combination component 103 , a second lens group 104 and a fluorescent wheel 105 are arranged in sequence along the second direction Y.
  • Multiple lasers 101 are arranged sequentially along the first direction X, and multiple lasers 101 are used to emit multiple laser beams.
  • the plurality of lasers 101 includes a first laser 1011 and a second laser 1012 .
  • the first laser 1011 emits a first laser beam S1, and the second laser 1012 emits a second laser beam S2.
  • the multiple first lens groups 102 correspond to the multiple lasers 101 , and the first lens groups 102 are configured to converge the laser beams emitted by the lasers 101 .
  • the plurality of first lens groups 102 includes a first sub-lens group 1021 and a second sub-lens group 1022 .
  • the first sub-lens group 1021 is located on the light emitting side of the first laser 1011 .
  • the first laser beam S1 emitted by the first laser 1011 is incident to the first sub-lens group 1021 and converged to the light-combining component 103 through the first sub-lens group 1021 .
  • the second sub-lens group 1022 is located on the light emitting side of the second laser 1012 .
  • the second laser beam S2 emitted by the second laser 1012 is incident on the second sub-lens group 1022 and converged to the light-combining component 103 through the second sub-lens group 1022 .
  • the light combining component 103 includes multiple reflective regions 1031 and multiple transmissive regions 1032 .
  • a plurality of reflective regions 1031 and a plurality of transmissive regions 1032 are arranged alternately, and the plurality of transmissive regions 1032 correspond to the plurality of first lens groups 102 .
  • the laser beams (such as the first laser beam S1 or the second laser beam S2 ) converged by the first lens group 102 enter the corresponding transmission area 1032 and enter the second lens group 104 through the corresponding transmission area 1032 .
  • the multiple reflective areas 1031 include a first reflective area 1031A, a second reflective area 1031B, and a third reflective area 1031C.
  • the plurality of transmissive regions 1032 include a first transmissive region 1032A and a second transmissive region 1032B.
  • the first transmissive area 1032A and the second transmissive area 1032B are respectively located between two adjacent reflective areas 1031 .
  • the first laser beam S1 converged by the first sub-lens group 1021 enters the first transmission area 1032A, and enters the second lens group 104 through the first transmission area 1032A.
  • the first laser beam S1 converged by the second sub-lens group 1022 enters the second transmission area 1032B, and enters the second lens group 104 through the second transmission area 1032B.
  • the multiple reflective regions 1031 are different parts of the reflective portion 1034 .
  • the plurality of reflection regions 1031 correspond to the plurality of reflection portions 1034 respectively.
  • the transmissive area 1032 in the light combining component 103 is located at the focal point of the corresponding first lens group 102 (the first focal point E and the second focal point F).
  • the laser beam emitted by the laser 101 is converged to a focal point by the first lens group 102, and diverges after passing through the focal point.
  • the light combination component 103 can include a smaller area of the transmissive region 1032 . In this way, the area of the transmissive region 1032 can be minimized to reduce the light loss of the light source assembly 10 .
  • the laser beams transmitted by the transmissive regions 1032 do not pass through the optical axis H of the second lens group 104, and the laser beams transmitted by the plurality of transmissive regions 1032 are irradiated on the second lens group
  • the position on 104 is symmetrical about the optical axis H of the second lens group 104 .
  • the positions where the first laser beam S1 transmitted by the first transmission area 1032A and the second laser beam S2 transmitted by the second transmission area 1032B are irradiated on the second lens group 104 are symmetrical with respect to the optical axis H of the second lens group 104 .
  • the two laser beams are in the second lens group 104
  • the light spot formed on is symmetrical with respect to the optical axis H of the second lens group 104 .
  • the center positions of the spots formed by the two laser beams on the second lens group 104 are symmetrical about the optical axis H of the second lens group 104 .
  • the irradiation position of the laser beam on the second lens group 104 may refer to all positions where the laser beam is irradiated on the second lens group 104, or may also refer to the position where the main laser beam in the laser beam is irradiated on the second lens group 104.
  • the main laser beam refers to the laser beam with the largest light intensity among the laser beams.
  • the light spot formed on the second lens group 104 by the fluorescence emitted by the second area 1052 can cover the part of the second lens group 104 close to the fluorescent wheel 105 surface.
  • the first laser beam S1 and the second laser beam S2 are symmetrical about the optical axis H of the second lens group 104 , the distance between the two laser beams is relatively large. Therefore, the light spot formed on the second lens group 104 by the laser beam reflected by the first area 1051 can also roughly cover the surface of the second lens group 104 close to the fluorescent wheel 105 .
  • the size difference of the light spot formed on the second lens group 104 by the laser beam reflected by the first area 1051 and the fluorescence emitted by the second area 1052 is small, thereby improving the color uniformity of the light spot after combining the laser beam and the fluorescence .
  • the size of the spot formed by the first laser beam S1 and the second laser beam S2 in the second lens group 104 is relatively large. In this way, the size of the light spot formed by the laser beam converged by the second lens group 104 on the first area 1051 of the fluorescent wheel 105 is larger, thereby increasing the laser beam reflected by the first area 1051 on the second lens group 104.
  • the size of the formed light spot further improves the color uniformity of the light spot after combining the laser beam and the fluorescent light.
  • the focal lengths of the plurality of first lens groups 102 are equal.
  • the first focal length F1 of the first sub-lens group 1021 is equal to the second focal length F2 of the second sub-lens group 1022 .
  • the size of the spots formed by the first laser beam S1 and the second laser beam S2 on the light-combining component 103 is approximately the same, which further improves the symmetry of the first laser beam S1 and the second laser beam S2 in the entire optical path system, and the light source Uniformity and symmetry of the illumination beam emitted by the assembly 10.
  • the third distance D3 between the second lens group 104 and the fluorescent wheel 105 is equal to that of the second lens group 104
  • the third focal length is F3.
  • the light receiving surface 1056 of the fluorescent wheel 105 is located at the focal plane of the second lens group 104 .
  • the optical axis H of the second lens group 104 is parallel to the light emitting direction of the laser 101 (eg, the second direction Y).
  • the distances between the plurality of first lens groups 102 and the second lens group 104 are different.
  • the first distance D1 between the first sub-lens group 1021 and the second lens group 104, and the second sub-lens group 1022 and the second lens group The second spacing D2 between 104 is different.
  • the distance between the first lens group 102 and the second lens group 104 refers to the distance between the main plane of the first lens group 102 and the main plane of the second lens group 104 .
  • the distance between a lens and other components in the present disclosure also refers to the distance between the main plane of the lens and other components.
  • the principal planes refer to two conjugate planes whose vertical magnification (transverse magnification) is equal to 1 in an ideal optical system.
  • the multiple transmission areas 1032 in the light-combining component 103 are respectively located at the focal points of the corresponding first lens groups 102, and the focal lengths (such as the first focal length F1 and the second focal length F2) of the multiple first lens groups 102 are equal Below, in a direction parallel to the optical axis H of the second lens group 104 , the distances between the plurality of first lens groups 102 and the corresponding transmissive regions 1032 are the same.
  • the light-combining component 103 is arranged obliquely with respect to the optical axis H of the second lens group 104, in a direction parallel to the optical axis H of the second lens group 104, a plurality of light-combining components 103
  • the distances between the transmission regions 1032 (such as the first transmission region 1032A and the second transmission region 1032B) and the second lens group 104 are different, so that the distances between the plurality of first lens groups 102 and the second lens group 104 are different.
  • the distance between any one of the first lens groups 102 in the plurality of first lens groups 102 and the second lens group 104 is not equal to the third focal length F3 of the second lens group 104 .
  • the optical system composed of two lenses if the focal lengths of the two lenses are respectively the fourth focal length F4 and the fifth focal length F5, and the fourth distance between the two lenses is D0, then the optical system composed of the two lenses
  • the sixth focal length F6 satisfies formula (1):
  • the laser beam emitted by the laser 101 enters the first lens group 102 , and enters the fluorescent wheel 105 through the optical system composed of the first lens group 102 and the second lens group 104 . Since the main focal length F0 of the optical system composed of the first lens group 102 and the second lens group 104 is not equal to the third focal length F3 of the second lens group 104, therefore, the fluorescent wheel 105 located at the focal plane of the second lens group 104 is not at the focal plane of the optical system.
  • the two laser beams emitted by the two lasers 101 are converged on the fluorescent wheel 105 through the second lens group 104, the two laser beams form two spots, or form a larger spot, and the two beams The spots of the laser beam do not converge into a single point.
  • the area of the laser beam irradiated on the fluorescent wheel 105 can be increased, thereby reducing the optical power density of the area of the fluorescent wheel 105 irradiated by the laser beam under the condition that the energy of the laser beam remains unchanged, which is beneficial to the heat dissipation of the fluorescent wheel 105, and
  • the fluorescent wheel 105 has higher fluorescence excitation efficiency.
  • the optical power density refers to the incident optical power per unit area.
  • the area of the transmission area 1032 is small and the spot of the laser beam reflected by the first area 1051 of the fluorescent wheel 105 is relatively large, when collimated by the second lens group 104 When the laser beam is incident on the light-combining component 103 , the laser beam passing through the transmissive area 1032 is less, which further reduces the optical loss of the light source assembly 10 .
  • FIG. 25 uses an example in which the first lens group 102 and the second lens group 104 respectively include only one lens (such as a convex lens) for illustration.
  • the first lens group 102 and the second lens group 104 may also include a plurality of lenses, so as to improve the converging effect of the first lens group 102 and the second lens group 104 on the laser beam.
  • the focal length and focal point of the first lens group 102 and the second lens group 104 refer to the focal length and focal point of a light system composed of multiple lenses.
  • the distance between the first lens group 102 and the second lens group 104 refers to the distance between a light system composed of a plurality of lenses.
  • the position where the laser beam is irradiated on the second lens group 104 refers to the position where the laser beam is irradiated on a lens in the second lens group 104 that is close to the laser 101 .
  • the laser beams (such as the first laser beam S1 and the second laser beam S2) emitted by the light combining component 103 are symmetrical about the optical axis H of the second lens group 104, when the laser beam passes through After being reflected by the fluorescent wheel 105 and entering the third lens group 108 through the second lens group 104 and the light-combining component 103 , the laser beam is evenly distributed on the third lens group 108 .
  • the laser beam when the laser beam is incident on the light guide 210, the laser beam can be symmetrical about the central axis of the light entrance of the light guide 210, so that the reflection of the laser beam on the upper and lower surfaces of the light guide 210 is approximately the same,
  • the laser beam emitted from the light pipe 210 is relatively uniform, which reduces the energy distribution difference between the laser beam and the fluorescent light at the exit of the light pipe 210, improves the color uniformity of the illumination beam emitted by the light source assembly 10, and improves the display effect of the projection screen.

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Abstract

一种激光投影设备（1）包括光源组件（10）、光机（20）以及镜头（30）。光源组件（10）包括至少一个激光器（101）、合光部件（103）和荧光轮（105）。至少一个激光器（101）被配置为发出激光光束。合光部件（103）包括反射区（1031）以及至少一个透射区（1032）。反射区（1031）被配置为反射入射的激光光束和荧光。至少一个透射区（1032）被配置为透射至少一个激光器（101）发出的激光光束。荧光轮（105）包括第一区（1051）和第二区（1052）。第一区（1051）被配置为将经至少一个透射区（1032）透射的激光光束漫反射至合光部件（103）。第二区（1052）被配置为在至少一个透射区（1032）透射的激光光束的照射下，受激产生荧光。

Description

激光投影设备
本申请要求于2021年09月27日提交的、申请号为202111135121.3的中国专利申请的优先权；2022年03月22日提交的、申请号为202220643953.X的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及激光投影技术领域，尤其涉及一种激光投影设备。
背景技术
激光投影技术以三基色激光作为光源，可以真实地再现客观世界丰富、艳丽的色彩。由于激光投影技术具有色域范围广、寿命长、效率高、功耗低等特点，受到广泛应用。
发明内容
一方面，提供一种激光投影设备。所述激光投影设备包括光源组件、光机以及镜头。所述光源组件被配置发出照明光束。所述光机被配置为将所述光源组件发出的照明光束进行调制以获得投影光束。所述镜头被配置为将所述投影光束进行成像。所述光源组件包括至少一个激光器、合光部件以及荧光轮。所述至少一个激光器被配置为发出激光光束。所述合光部件位于所述至少一个激光器的出光侧，且相对于所述至少一个激光器的出光方向倾斜设置。所述合光部件包括反射区以及至少一个透射区。所述反射区被配置为反射入射的激光光束和荧光。所述至少一个透射区被配置为透射所述至少一个激光器发出的激光光束。所述荧光轮位于所述合光部件的远离所述至少一个激光器的一侧。所述荧光轮包括第一区和第二区。所述第一区被配置为将经所述至少一个透射区透射的激光光束漫反射至所述合光部件。所述第二区被配置为在所述至少一个透射区透射的激光光束的照射下，受激产生荧光。随所述荧光轮的旋转，所述至少一个透射区透射的激光光束分别照射所述第一区和所述第二区，经所述第一区反射的激光光束和所述第二区发出的荧光分别入射至所述合光部件，并经所述合光部件反射至所述光源组件的出光口。从所述光源组件的所述出光口出射的激光光束和荧光构成所述照明光束。
另一方面，提供一种激光投影设备。所述激光投影设备包括光源组件、光机以及镜头。所述光源组件被配置发出照明光束。所述光机被配置为将所述光源组件发出的照明光束进行调制以获得投影光束。所述镜头被配置为将所述投影光束进行成像。所述光源组件包括多个激光器、多个第一透镜组、合光部件、第二透镜组以及荧光轮。所述多个激光器被配置为发出激光光束。所述多个第一透镜组与所述多个激光器对应，且所述多个第一透镜组被配置为会聚所述多个激光器发出的激光光束。所述合光部件位于所述多个激光器的出光侧，且相对于所述多个激光器的出光方向倾斜设置。所述合光部件包括反射区以及多个透射区。所述反射区被配置为反射入射的激光光束。所述多个透射区与所述多个第一透镜组对应、且多个透射区间隔排布。所述多个透射区被配置为透射经所述多个第一透镜组会聚的激光光束。所述第二透镜组位于所述合光部件的远离所述多个激光器的一侧，且所述第二透镜组被配置为会聚所述多个透射区透射的激光光束。所述多个透射区透射的激光光束照射在所述第二透镜组上的位置关于所述第二透镜组的光轴对称。所述荧光轮位于所述第二透镜组的远离所述合光部件的一侧。所述荧光轮包括第一区和第二区。所述第一区被配置为将所述第二透镜组会聚的激光光束反射至所述第二透镜组。所述第二区被配置为在所述第二透镜组会聚的激光光束的照射下，受激产生荧光。随所述荧光轮的旋转，所述第二透镜组会聚的激光光束分别照射所述第一区和所述第二区，经所述第一区反射的激光光束和所述第二区发出的荧光分别经过所述第二透镜组入射至所述合光部件，并经所述合光部件反射至所述光源组件的出光口。从所述光源组件的所述出光口出射的激光光束和荧光构成所述照明光束。
附图说明
图1为根据一些实施例的一种激光投影设备的结构图；
图2为根据一些实施例的一种激光投影设备的部分结构图；
图3为根据一些实施例的激光投影设备中光源组件、光机和镜头的光路图；
图4为根据一些实施例的激光投影设备中光源组件、光机和镜头的另一种光路图；
图5为根据一些实施例的一种数字微镜器件中微小反射镜片的排列图；
图6为根据一些实施例的激光投影设备中光源组件、光机和镜头的又一种光路图；
图7为相关技术中的光源组件的结构图；
图8为相关技术的另一种光源组件的结构图；
图9为根据一些实施例的光源组件的结构图；
图10为根据一些实施例的合光部件的结构图；
图11为根据一些实施例的另一种光源组件的结构图；
图12为根据一些实施例的另一种合光部件的结构图；
图13为根据一些实施例的又一种合光部件的结构图；
图14为根据一些实施例的又一种合光部件的结构图；
图15为根据一些实施例的又一种合光部件的结构图；
图16为根据一些实施例的又一种光源组件的结构图；
图17为根据一些实施例的又一种合光部件的结构图；
图18为根据一些实施例的荧光轮的结构图；
图19为根据一些实施例的荧光轮的另一种结构图；
图20为根据一些实施例的又一种光源组件的结构图；
图21为根据一些实施例的光源组件中合光部件和复眼透镜的结构图；
图22为根据一些实施例的激光光束照射至复眼透镜上时形成的光斑的示意图；
图23为根据一些实施例的又一种光源组件的结构图；
图24为根据一些实施例的光源组件中合光部件和复眼透镜的另一种结构图；
图25为根据一些实施例的又一种光源组件的结构图。
附图标记说明：
激光投影设备1；光源组件10'；激光器101'；合光组件103'；合光镜片1031'；反射镜片1032'；荧光轮105'；出光口109'；光源组件10；激光器101；第一激光器1011；第二激光器1012；第一透镜组102；凸透镜102A；凹透镜102B；第一子透镜组1021；第二子透镜组1022；合光部件103；反射区1031；第一反射区1031A；第二反射区1031B；第三反射区1031C；透射区1032；第一透射区1032A；第二透射区1032B；透射部1033；反射部1034；反射面1035；圆柱透镜1036；第一基板1030；二向色膜1037；反射膜1038；通孔1039；增透膜1040；第二透镜组104；第三子透镜1041；第四子透镜1042；荧光轮105；第一区1051；第二区1052；第一子荧光区1052A；第二子荧光区1052B；第二基板1050；第一反射层1053；荧光材料层1054；第二反射层1055；复眼透镜106；衬底1061；微透镜1062；转折镜组107；第一反射镜组1071；第一反射镜1071A；第二反射镜1071B；第二反射镜组1072；第三反射镜1072A；第四反射镜1072B；第三透镜组108；出光口109；光机20；光导管210；平面镜220；透镜组件230；棱镜组件240；数字微镜器件250；微小反射镜片2501；镜头30；整机壳体40。
具体实施方式
下面将结合附图，对本公开一些实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开一部分实施例，而不是全部的实施例。基于本公开所提供的实施例，本领域普通技术人员所获得的所有其他实施例，都属于本公开保护的范围。
除非上下文另有要求，否则，在整个说明书和权利要求书中，术语“包括(comprise)”及其其他形式例如第三人称单数形式“包括(comprises)”和现在分词形式“包括(comprising)”被解释为开放、包含的意思，即为“包含，但不限于”。在说明书的描述中，术语“一个实施例(one embodiment)”、“一些实施例(some embodiments)”、“示例性实施例(exemplary embodiments)”、“示例(example)”、“特定示例(specific example)”或“一些示例(some examples)”等旨在表明与该实施例或示例相关的特定 特征、结构、材料或特性包括在本公开的至少一个实施例或示例中。上述术语的示意性表示不一定是指同一实施例或示例。此外，所述的特定特征、结构、材料或特点可以以任何适当方式包括在任何一个或多个实施例或示例中。
以下，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本公开实施例的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在描述一些实施例时，可能使用了“连接”及其衍伸的表达。例如，描述一些实施例时可能使用了术语“连接”以表明两个或两个以上部件彼此间有直接物理接触或电接触。然而，术语“连接”也可能指两个或两个以上部件彼此间并无直接接触，但仍彼此协作或相互作用。这里所公开的实施例并不必然限制于本文内容。
“A和/或B”，包括以下三种组合：仅A，仅B，及A和B的组合。
本文中“适用于”或“被配置为”的使用意味着开放和包容性的语言，其不排除适用于或被配置为执行额外任务或步骤的设备。
如本文所使用的那样，“约”、“大致”或“近似”包括所阐述的值以及处于特定值的可接受偏差范围内的平均值，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。
如本文所使用的那样，“平行”、“垂直”、“相等”包括所阐述的情况以及与所阐述的情况相近似的情况，该相近似的情况的范围处于可接受偏差范围内，其中所述可接受偏差范围如由本领域普通技术人员考虑到正在讨论的测量以及与特定量的测量相关的误差(即，测量系统的局限性)所确定。
图1为根据一些实施例的一种激光投影设备的结构图。本公开一些实施例提供一种激光投影设备1。如图1所示，该激光投影设备1包括整机壳体40(图1中仅示出部分壳体40)，装配于壳体40中的光源组件10，光机20，以及镜头30。该光源组件10被配置为提供照明光束(激光光束)。该光机20被配置为利用图像信号对光源组件10提供的照明光束进行调制以获得投影光束。该镜头30被配置为将投影光束投射在屏幕或墙壁上成像。
光源组件10、光机20和镜头30沿着光束传播方向依次连接，各自由对应的壳体进行包裹。光源组件10、光机20和镜头30各自的壳体对相应的光学部件进行支撑并使得各光学部件达到一定的密封或气密要求。
图2为根据一些实施例的一种激光投影设备的部分结构图。如图2所示，光机20的一端连接光源组件10，且光源组件10和光机20沿着激光投影设备1的照明光束的出射方向(参照图2中的M方向)设置。光机20的另一端和镜头30连接，且光机20和镜头30沿着激光投影设备1的投影光束的出射方向(参照图2中所示的N方向)设置。照明光束的出射方向M与投影光束的出射方向N大致垂直，这种连接结构一方面可以适应光机20中反射式光阀的光路特点，另一方面，还有利于缩短一个维度方向上光路的长度，利于整机的结构排布。例如，当将光源组件10、光机20和镜头30设置在一个维度方向(例如M方向)上时，该维度方向上光路的长度就会很长，从而不利于整机的结构排布。所述反射式光阀将在后文中描述。
在一些实施例中，光源组件10可以时序性地提供三基色光(也可以在三基色光的基础上增加其他色光)，由于人眼的视觉暂留现象，人眼看到的是由三基色光混合形成的白光。或者，光源组件10也可以同时输出三基色光，持续发出白光。光源组件10包括激光器，该激光器可发出至少一种颜色的激光光束，比如红色激光光束、蓝色激光光束或绿色激光光束。
图3为根据一些实施例的激光投影设备中光源组件、光机和镜头的光路图，图4为根据一些实施例的激光投影设备中光源组件、光机和镜头的另一种光路图。
光源组件10发出的照明光束进入光机20。参考图3和图4，光机20包括光导管210、平面镜220、透镜组件230、棱镜组件240以及数字微镜器件(Digital Micromirror Device，DMD)250。该光导管210可以接收光源组件10提供的照明光束，并对该照明光束进行匀 化。此外，该光导管210的出口可以为矩形，从而对光斑具有整形效果。平面镜220可以将照明光束反射至透镜组件230。透镜组件230可以将照明光束会聚至棱镜组件240。棱镜组件240将照明光束反射至数字微镜器件250，数字微镜器件250对照明光束进行调制以得到投影光束，并将投影光束反射至镜头30中。当然，光导管210也可以用复眼透镜或其他具有匀光功能的部件替代，本公开对此不做限制。
在一些实施例中，光导管210包括第一光导管或第二光导管。第一光导管是一种由四片呈平面状的反射片拼接而成的管状器件，第一光导管的内部中空。激光光束在第一光导管内部多次反射，从而被匀化。第二光导管可以为石英材质，第二光导管通过使激光光束在第二光导管的内部产生全反射，以传输和匀化该激光光束。
光机20中，数字微镜器件250是利用图像信号对光源组件10提供的照明光束进行调制，即：控制投影光束针对待显示图像的不同像素显示不同的亮度和灰阶，以最终形成光学图像，因此数字微镜器件250也被称为光调制器件或光阀。根据光调制器件(或光阀)对照明光束进行透射还是进行反射，可以将光调制器件分为透射式光调制器件或反射式光调制器件。例如，图4所示的数字微镜器件250对照明光束进行反射，即为一种反射式光调制器件。而液晶光阀对照明光束进行透射，因此是一种透射式光调制器件。此外，根据光机20中使用的光调制器件的数量，可以将光机20分为单片系统、双片系统或三片系统。本公开一些实施例中的光调制器件为数字微镜器件250。
图5为根据一些实施例的一种数字微镜器件中微小反射镜片的排列图。
如图5所示，数字微镜器件250包含成千上万个可被单独驱动以旋转的微小反射镜片2501，这些微小反射镜片2501呈阵列排布，一个微小反射镜片2501(例如每个微小反射镜片2501)对应待显示的投影画面中的一个像素。图像信号通过处理后可以转换成0、1这样的数字代码，响应于这些数字代码，微小反射镜片2501可以摆动。控制每个微小反射镜片2501在开状态和关状态分别持续的时间，来实现一帧图像中每个像素的灰阶。这样，数字微镜器件250可以对照明光束进行调制，进而实现投影画面的显示。微小反射镜片2501的开状态为光源组件10发出的照明光束经微小反射镜片2501反射后可以进入镜头30时，微小反射镜片2501所处且可以保持的状态。微小反射镜片2501的关状态为光源组件10发出的照明光束经微小反射镜片2501反射后未进入镜头30时，微小反射镜片2501所处且可以保持的状态。
图6为根据一些实施例的激光投影设备中光源组件、光机和镜头的又一种光路图。在一些实施例中，如图6所示，镜头30包括多片透镜组合，通常按照群组进行划分，分为前群、中群和后群三段式，或者前群和后群两段式。前群是靠近激光投影设备1出光侧(即，图6中镜头30沿着N方向远离光机20的一侧)的镜片群组，后群是靠近光机20出光侧(即，图6中镜头30沿着N方向的反方向靠近光机20的一侧)的镜片群组。镜头30可以是变焦镜头，或者为定焦可调焦镜头，或者为定焦镜头。
为了便于叙述，本公开一些实施例主要以光源组件10时序性地输出三基色光、以及光机20中光调制器件为数字微镜器件250为例进行说明，然而，这并不能理解为对本公开的限制。
图7为相关技术中的光源组件的结构图。图8为相关技术中的另一种光源组件的结构图。通常，如图7所示，光源组件10'包括激光器101'、合光组件103'以及荧光轮105'。激光器101'被配置为发出激光光束。合光组件103'包括合光镜片1031'以及反射镜片1032'。合光镜片1031'被配置为将激光器101'发出的激光光束透射至荧光轮105'，并反射荧光轮105'发出的荧光。反射镜片1032'位于合光镜片1031'的远离荧光轮105'的一侧，且被配置为反射荧光轮105'反射的激光光束。荧光轮105'被配置为反射合光镜片1031'透过的激光光束，以及在合光镜片1031'透过的激光光束的照射下，被该激光光束激发以发出荧光。
荧光轮105'发出的荧光和反射的激光光束入射至合光镜片1031'。合光镜片1031'将荧光反射至光源组件10'的出光口109'，且将荧光轮105'反射的激光光束透射至反射镜片1032'。反射镜片1032'将经合光镜片1031'透射的激光光束再次反射至合光镜片1031'，经反射镜片1032'反射的激光光束第三次透过合光镜片1031'、并入射至光源组件10'的出光口109'。
在上述光源组件10'中，激光器101'发出的激光光束三次透过合光镜片1031'。由于合光镜片1031'对光线的透过率约为96％～97％。在激光光束三次透过合光镜片1031'后，合光镜片1031'对该激光光束的透过率约为(96％) 3≈88％，导致光源组件10'的光损较高。
另外，如图8所示，在荧光轮105'包括激光透射区，以及合光组件103'仅包括合光镜片1031'的情况下，需要额外设置由至少3个反射镜片1001'、1002'和1003'组成的中继回路，从而将经过荧光轮105'的激光透射区的激光光束反射至光源组件10'的出光口109'。该中继回路的使用将使得光源组件10'的光学元件增多，不利于光源组件10'的小型化。
本公开一些实施例提供一种光源组件10。该光源组件10通过设置具有反射区1031和透射区1032的合光部件103以解决上述问题。具有反射区1031和透射区1032的合光部件103将在后文中描述。
图9为根据一些实施例的光源组件的结构图，图10为根据一些实施例的合光部件的结构图。在一些实施例中，如图9所示，光源组件10包括激光器101、合光部件103以及荧光轮105。激光器101、合光部件103以及荧光轮105沿第二方向Y依次排布。激光器101被配置为发出激光光束。例如，激光器101可以发出蓝色激光光束。需要说明的是，图9仅以光源组件10包括一个激光器101为例进行说明，当然，光源组件10也可以包括多个激光器101。
合光部件103位于激光器101的出光侧，且相对于激光器101的出光方向(如图9中的第二方向Y)倾斜设置。例如，如图9所示，激光器101的出光方向与合光部件103之间的夹角θ为锐角。这样，合光部件103可以沿第一方向X反射入射的激光光束和荧光。需要说明的是，本公开以第一方向X与第二方向Y垂直为例进行说明，当然，本公开一些实施例并不局限于此。例如，该第一方向X与第二方向Y的夹角也可以为钝角或锐角。
在一些实施例中，合光部件103与激光器101的出光方向之间的夹角θ呈45°，以便于在合光部件103的四周设置荧光轮105，以及便于将来自荧光轮105的荧光和激光光束反射至光源组件10的出光口109。
在一些实施例中，如图9和图10所示，合光部件103包括反射区1031以及透射区1032。反射区1031被配置为反射入射的激光光束和荧光。透射区1032被配置为透过激光器101发出的激光光束。当然，反射区1031也可以反射颜色与该激光光束和荧光不同的光线(激光光束或荧光)，本公开对此不做限定。
在一些实施例中，透射区1032的形状和激光器101发出的激光光束在合光部件103上的光斑的形状相同。这样，在不影响激光器101发出的激光光束透过透射区1032的情况下，可以最大程度地减小透射区1032的尺寸。另外，反射区1031的面积大于透射区1032的面积，以便于反射区1031反射经荧光轮105反射的激光光束和荧光轮105发出的荧光。
在一些实施例中，透射区1032还被配置为反射与激光器101发出的激光光束颜色不同的荧光。如图10所示，合光部件103包括透射部1033，透射部1033位于透射区1032。透射部1033被配置为透过激光器101发出的激光光束，并反射荧光轮105发出的荧光。例如，透射部1033为二向色镜(Dichroic Mirror)，在激光器101发出蓝色激光光束、荧光轮105发出红色荧光和绿色荧光的情况下，该二向色镜可以透射蓝色激光光束，且反射红色荧光和绿色荧光。这样，可以提高荧光的利用率，避免一部分荧光透过透射区1032，导致光损。
在一些实施例中，如图10所示，合光部件103包括反射部1034，反射部(如反射镜)1034位于反射区1031。反射部1034被配置为反射荧光轮105发出的荧光和荧光轮105反射的激光光束。需要说明的是，该反射部1034可以和透射部1033固定连接。
在合光部件103包括透射部1033和反射部1034的情况下，激光器101发出的激光光束透过透射区1032中的透射部1033，并照射到荧光轮105上。激光器101发出的激光光束经荧光轮105反射至合光部件103，并经反射部1034反射至光源组件10的出光口109。荧光轮105受激发出的荧光入射至合光部件103，并经反射部1034以及透射部1033反射至光源组件10的出光口109，从而作为光源组件10的照明光束入射至光机20中。
图11为根据一些实施例的另一种光源组件的结构图。相比于图9和图10，图11中的 反射部1034和透射部1033的形状发生改变。在一些实施例中，如图11所示，反射部1034包括反射面1035，该反射面1035为反射部1034与荧光轮105相对的表面，且该反射面1035呈曲面。在此情况下，反射面1035被配置为会聚来自荧光轮105的荧光以及激光光束、并将该荧光以及激光光束反射至光源组件10的出光口109。
在一些实施例中，反射面1035可以为直纹曲面，或曲纹面。直纹曲面式反射面可以在一个维度的方向(如平行于第二方向Y的方向)上会聚入射的激光光束或荧光。曲纹面式反射面可以在两个维度的方向上会聚入射的激光光束或荧光。需要说明的是，直纹曲面指的是至少有一条直线经过曲面上的任意一点的曲面，如圆柱面。曲纹面指的是母线为曲线的曲面，如球面。
在一些实施例中，如图11所示，透射部1033包括圆柱透镜1036(Cylindrical Lens)，该圆柱透镜1036位于透射区1032。圆柱透镜1036和反射部1034固定连接，且被配置为透过激光器101发出的激光光束。该圆柱透镜1036的中心轴线平行于第二方向Y。这样，激光器101发出的激光光束可以垂直入射至圆柱透镜1036，并在透过圆柱透镜1036后垂直入射至荧光轮105。当然，圆柱透镜1036也可以用其它形状的透镜代替，只要使激光器101发出的激光光束在透过透射部1033后可以垂直入射至荧光轮105上即可。
前文主要以合光部件103为分体件为例进行示意。当然，在一些实施例中，合光部件103也可以为一体件。
图12为根据一些实施例的另一种合光部件的结构图。图13为根据一些实施例的又一种合光部件的结构图。相比于图10，图12和图13中的合光部件103为一体件。例如，如图12所示，合光部件103包括第一基板1030、二向色膜1037以及反射膜1038。第一基板1030可以采用透明基板。二向色膜1037和反射膜1038分别设置在第一基板1030上，且二向色膜1037位于透射区1032，反射膜1038位于反射区1031。反射膜1038被配置为反射入射的荧光和激光光束。例如，反射膜1038可以反射全波段的激光光束和荧光。二向色膜1037被配置为透射激光器101发出的激光光束，且反射荧光轮105发出的荧光。这样，合光部件103可以具有透射和反射两种功能。需要说明的是，该二向色膜1037也可以反射其他颜色的荧光，或与激光器101发出的激光光束颜色不同的激光光束。
又例如，如图13所示，除第一基板1030和反射膜1038以外，合光部件103还包括通孔1039。通孔1039设置在第一基板1030上，且通孔1039位于透射区1032。通孔1039被配置为透过激光器101发出的激光光束。这样，可以使合光部件103具有透射和反射两种功能，并且，可以省去二向色膜1037，节省合光部件103的材料以及简化合光部件103的制造工艺。需要说明的是，在合光部件103包括通孔1039的情况下，透射区1032可以透射全波段的激光光束和荧光。当然，合光部件103也可以不包括通孔1039，只要第一基板1030位于透射区1032的部分为透明基板，并且可以透射全波段的激光光束和荧光即可。
图14为根据一些实施例的又一种合光部件的结构图，图15为根据一些实施例的又一种合光部件的结构图。相比于图12，图14和图15增加了增透膜1040。
在一些实施例中，如图14和图15所示，合光部件还包括增透膜1040。增透膜1040设置在合光部件103的靠近激光器101的表面，且增透膜1040被配置为增加合光部件103对激光光束的透过率。例如，增透膜1040仅增加激光器101发出的激光光束(如蓝色激光光束)的透过率；或者，该增透膜1040可以增加全波段的激光光束和荧光的透过率。
在一些实施例中，如图14所示，增透膜1040设置在合光部件103的靠近激光器101的表面上，并且覆盖该表面。或者，如图15所示，增透膜1040也可以仅设置在合光部件103的位于透射区1032的表面。这样，可以减小激光光束的损耗，提高激光光束的利用率。
在一些实施例中，合光部件103还包括光扩散结构。所述光扩散结构设置在合光部件103的靠近激光器101的表面。例如，所述光扩散结构为扩散片，或者，所述光扩散结构为多个微棱镜(如梯形棱镜、三棱镜或直角棱镜等)组成的结构，或者，所述光扩散结构为多个平行的条状凸起组成的结构。该光扩散结构被配置为扩散入射至合光部件103的激光光束，以提高从合光部件103透过的激光光束的均匀性。这样，该激光光束照射在荧光轮105后，荧光轮105受激发出的荧光的能量分布较为均匀。
在一些实施例中，如图9所示，合光部件103仅包括一个透射区1032。该透射区1032位于合光部件103的中心，且反射区1031围绕该透射区1032设置。
当然，本公开一些实施例中的合光部件103并不局限于此。在一些实施例中，合光部件103还可以包括多个透射区1032，且多个透射区1032间隔排布。
图16为根据一些实施例的又一种光源组件的结构图。图17为根据一些实施例的又一种合光部件的结构图。相比于图9，图16和图17增加了透射区1032的数量。例如，如图16和图17所示，多个透射区1032包括第一透射区1032A和第二透射区1032B。反射区1031位于第一透射区1032A和第二透射区1032B之间，且第一透射区1032A位于反射区1031的靠近激光器101的一侧，第二透射区1032B位于反射区1031的远离激光器101的一侧。多个透射区1032的结构与作用与透射区1032相同，此处不再赘述。
在一些实施例中，在合光部件103包括多个透射区1032的情况下，合光部件103可以包括多个透射部1033、或者多个二向色膜1037或者多个通孔1039。例如，合光部件103包括两个透射部1033，该两个透射部1033分别位于第一透射区1032A和第二透射区1032B。或者，合光部件103包括第一基板1030和位于第一基板1030上的反射膜1038以及两个二向色膜1037。两个二向色膜1037分别位于第一透射区1032A和第二透射区1032B，反射膜1038位于反射区1031。或者，合光部件103包括第一基板1030、以及位于第一基板1030上的反射膜1038和两个通孔1039。该两个通孔1039分别位于第一透射区1032A和第二透射区1032B，反射膜1038位于反射区1031。
为了使激光器101发出的激光光束可以分别入射至多个透射区1032，在一些实施例中，如图16所示，光源组件10还包括转折镜组107。转折镜组107位于合光部件103和激光器101之间，且被配置为对激光器101发出的激光光束进行分束，以将该激光光束分成多束激光光束，并使所述多束激光光束与多个透射区1032对应。
例如，如图16所示，转折镜组107包括第一反射镜组1071和第二反射镜组1072。第一反射镜组1071和第二反射镜组1072分别将激光器101发出的激光光束反射至第一透射区1032A和第二透射区1032B。例如，激光器101包括多个阵列排布的激光芯片，每个激光芯片可以发出激光光束。第一反射镜组1071包括第一反射镜1071A和第二反射镜1071B，第一反射镜1071A将激光器101中的部分激光芯片发出的激光光束反射至第二反射镜1071B，第二反射镜1071B将入射的激光光束反射至第一透射区1032A。
第二反射镜组1072包括第三反射镜1072A和第四反射镜1072B，第三反射镜1072A将激光器101中另一部分激光芯片发出的激光光束反射至第四反射镜1072B，第四反射镜1072B将入射的激光光束反射至第二透射区1032B。这样，可以将激光器101发出的激光光束的分束成两束激光光束，以分别入射至第一透射区1032A和第二透射区1032B。
当然，本公开一些实施例中的光源组件10并不局限于此。在一些实施例中，光源组件10也可以包括多个激光器101，多个激光器101与多个透射区1032对应，以使多个激光器101发出的多束激光光束可以分别入射至多个透射区1032。
图18为根据一些实施例的荧光轮的结构图，图19为根据一些实施例的荧光轮的另一种结构图。在一些实施例中，如图9所示，荧光轮105位于合光部件103的远离激光器101的一侧，且荧光轮105被配置为反射合光部件103透射的激光光束，以及在该激光光束的照射下受激以发出荧光。例如，如图18所示，荧光轮105包括第一区1051和第二区1052。第一区1051被配置为反射合光部件103透射的激光光束。第二区1052被配置为在合光部件103透射的激光光束的照射下受激以发出荧光。需要说明的是，荧光轮105产生的荧光的颜色与激光器101发出的激光光束的颜色不同。
在一些实施例中，如图18和图19所示，光源组件10还包括转轴Z。荧光轮105可以绕转轴Z转动。例如，如图18所示，荧光轮105可以绕转轴Z沿W方向或W方向的反方向转动。在荧光轮105的转动过程中，激光器101发出的激光光束在透过透射区1032后可以照射在荧光轮105中的不同区(如第一区1051和第二区1052)上。
当透射区1032透过的激光光束入射至荧光轮105的第一区1051时，该第一区1051反射该激光光束，且经第一区1051反射的激光光束入射至合光部件103的反射区1031。 当透射区1032透过的激光光束入射至荧光轮105中的第二区1052时，第二区1052被该激光光束激发以发出荧光，且该荧光入射至合光部件103的反射区1031。合光部件103的反射区1031将入射的激光光束和荧光沿第一方向X反射至光源组件10的出光口109。
在一些实施例中，荧光轮105的远离合光部件103的一侧不透光。当第二区1052受激发出荧光时，该荧光以朗伯体的形式向各个方向出射。在此情况下，通过使荧光轮105的远离合光部件103的一侧不透光，可以使第二区1052发出的荧光的发光角度大致在0°～180°范围内。需要说明的是，所述朗伯体可以指一种发光体，该发光体可以向四周各向同性地出射光线。
在一些实施例中，荧光轮105包括反射材料以及至少一种荧光材料。该反射材料位于第一区1051，并且可以反射入射的激光光束。该荧光材料位于第二区1052，且该荧光材料可以在激光光束的照射下受激以发出荧光。例如，如图19所示，荧光轮105包括第二基板1050、第一反射层1053以及荧光材料层1054。第一反射层1053和荧光材料层1054分别设置在第二基板1050的靠近合光部件103的表面上，且第一反射层1053位于荧光轮105的第一区1051，荧光材料层1054位于荧光轮105的第二区1052。第二基板1050可以为透明基板或反射基板。在第二基板1050为反射基板的情况下，第二基板1050位于第一区1051的表面可以不设置任何材料层(如第一反射层1053)。需要说明的是，一种颜色的荧光材料层1054可以受激发出该种颜色的荧光。
当激光光束入射至第一区1051时，该激光光束可以被第一反射层1053反射。当激光光束入射至第二区1052时，该激光光束可以激发荧光材料层1054发出对应颜色的荧光。
在一些实施例中，第一反射层1053采用漫反射材料。该漫反射材料可以将透射区1032透过的激光光束漫反射至合光部件103，以匀化入射的激光光束。荧光材料层1054采用绿色荧光材料，或者，荧光材料层1054也可以采用红色荧光材料或黄色荧光材料中的至少一个。这样，第二区1052可以发出绿色荧光、红色荧光或其他颜色的荧光(如黄色荧光)。
在一些实施例中，第二区1052包括至少一个子荧光区，每个子荧光区设置有一种颜色的荧光材料层。当第二区1052包括多个子荧光区时，多个子荧光区与第一区1051可以环绕转轴Z呈圆周排布。例如，如图18所示，第二区1052包括第一子荧光区1052A和第二子荧光区1052B。在此情况下，荧光材料层1054可以采用绿色荧光材料，黄色荧光材料或红色荧光材料中的任意两个。采用不同荧光材料的荧光材料层1054分别位于第一子荧光区1052A和第二子荧光区1052B。
需要说明的是，本公开一些实施例中以第二区1052中多个子荧光区的面积相等，且第一区1051的面积与任意一个子荧光区的面积也相等为例进行说明。当然，多个子荧光区和第一区1051的面积也可以不同，多个子荧光区和第一区1051的面积可以根据其对应颜色的激光光束或荧光在所需得到的白光中的占比进行设计。
例如，在激光器101发出蓝色激光光束、第一子荧光区1052A采用红色荧光材料，第二子荧光区1052B采用绿色荧光材料、且荧光轮105的转速不变的情况下，如果蓝色激光光束、红色荧光和绿色荧光以1:2:1的比例混合后可以得到白光，则第一区1051的面积和第二子荧光区1052B的面积相等，且第二子荧光区1052B的面积为第一子荧光区1052A的面积的一半。当然，激光器101发出的激光光束以及荧光轮105激发的荧光的颜色也可以为其它颜色，本公开对此不做限定。
在一些实施例中，如图19所示，荧光轮105还包括第二反射层1055。第二反射层1055位于第二区1052、且设置在荧光材料层1054和第二基板1050之间。第二反射层1055被配置为反射荧光材料层1054受激发出的荧光。由于荧光以朗伯体的形式出射，其发光角度为360°，通过在荧光材料层1054的一侧设置第二反射层1055，可以反射朝向靠近第二基板1050方向出射的荧光，从而提高荧光的利用率，提高荧光的亮度。
在本公开一些实施例的光源组件10中，激光器101发出的激光光束仅经过一次合光部件103的透射区1032，相较于图7中激光光束多次透过合光镜片1031'，可以减少激光器101发出的激光光束经过的合光部件103的次数，减少了激光光束的光损，提高了光源组件10中激光光束的利用率。并且，通过设置包括透射区1032和反射区1031的合光部 件103，无需额外设置中继回路系统，使得光源组件10的光学元件少，光路架构紧凑，不仅可以实现较高的发光功率，还利于光源组件10的小型化。
在一些实施例中，如图9所示，光源组件10还包括第一透镜组102。第一透镜组102位于激光器101和合光部件103之间，且第一透镜组102被配置为缩小从激光器101发出的激光光束的光斑。第一透镜组102可以使射出第一透镜组102的激光光束的光束相比射入第一透镜组102的激光光束的光束更细。在此种情况下，合光部件103中的透射区1032的尺寸可以较小，利于缩小合光部件103的体积，或者，在合光部件103的尺寸一定的情况下，合光部件103中的反射区1031的尺寸可以较大，使反射区1031反射较多的荧光和激光光束，从而提高对荧光和激光光束的利用率。
在一些实施例中，第一透镜组102包括凸透镜102A和凹透镜102B。凸透镜102A和凹透镜102B沿第二方向Y依次排布。这样，第一透镜组102可以对激光器101发出的激光光束先会聚后发散，使入射至透射区1032的激光光束平行于激光器101的出光方向。
在一些实施例中，如图9所示，光源组件10还包括第二透镜组104。第二透镜组104位于合光部件103与荧光轮105之间。第二透镜组104被配置为将入射的激光光束会聚至荧光轮105，并准直荧光轮105反射的激光光束和荧光轮105发出的荧光。
例如，第二透镜组104包括第三子透镜1041和第四子透镜1042。第三子透镜1041(如球面凸透镜或非球面凸透镜)和第四子透镜1042(如球面凸透镜或非球面凸透镜)沿同一个光轴设置，并沿着第二方向Y依次排布。由于第二透镜组104可以准直荧光轮105反射的激光光束和荧光轮105发出的荧光，因此，荧光轮105出射的激光光束和荧光以类似于朗伯体的形式经第二透镜组104准直后，可以以平行光的形式从第二透镜组104出射，并入射至合光部件103。入射至合光部件103的激光光束和荧光不仅入射至反射区1031，还可以入射至透射区1032。在此情况下，通过上述设置在透射区1032的透射部1033或二向色膜1037可以对入射至透射区1032的荧光进行反射，从而提高荧光的利用率。
在一些实施例中，如图16所示，光源组件10还包括第三透镜组108。合光部件103和第三透镜组108沿第一方向X依次排布，且第三透镜组108被配置为会聚合光部件103反射的激光光束和荧光，并将会聚后的激光光束和荧光经光源组件10的出光口109入射至光导管210。需要说明的是，图16以第三透镜组108包括一个透镜为例进行说明。当然，第三透镜组108也可以包括多个透镜。
图20为根据一些实施例的又一种光源组件的结构图，图21为根据一些实施例的光源组件中合光部件和复眼透镜的结构图。图22为根据一些实施例的激光光束照射至复眼透镜上时形成的光斑的示意图。相比于图9，图20增加了复眼透镜106。
在一些实施例中，如图20和图21所示，光源组件10还包括复眼透镜106。复眼透镜106设置在合光部件103上，且位于合光部件103的透射区1032。复眼透镜106被配置为匀化和整形激光器101发出的激光光束。
在一些实施例中，如图20和图22所示，复眼透镜106包括衬底1061以及多个微透镜(Micro-lens)1062。衬底1061可以采用玻璃基板。多个微透镜1062设置衬底1061上、且阵列排布。微透镜1062的远离衬底1061的表面为曲面。该曲面在衬底1061上的正投影的相邻的两条边的长度比为预设值，以使经多个微透镜1062整形后的激光光束的光斑与光导管210的入光口形状相匹配。
例如，如图22所示，激光器101发出的一束激光光束的光斑R呈椭圆形。当激光器101的位置不同时，激光器101发出的激光光束照射在复眼透镜106上的光斑R的位置也不同。如，椭圆形的光斑R的长轴L的方向发生改变。需要说明的是，长轴L指的是通过连接椭圆形的光斑R的边缘上的任意两个点所能获得的最长线段。
微透镜1062可以采用平凸透镜。该平凸透镜的靠近衬底1061的表面为平面，该平凸透镜的远离衬底1061的表面为曲面。该曲面在衬底1061上的正投影呈矩形。这样，多个微透镜1062可以将入射的激光光束的光斑R分割为多个矩形光斑，并通过第二透镜组104将多个矩形光斑会聚成一个矩形光斑、并照射至荧光轮105的受光面1056上，以匀化和整形激光器101发出的激光光束，以使从光源组件10出射的激光光束和荧光的光斑的形 状与光机20中光导管210的入光口的形状(如光导管210的入光口呈矩形)相匹配。
当然，在本公开一些实施例中，复眼透镜106中的微透镜1062也可以为球面凸透镜或非球面凸透镜。需要说明的是，在合光部件103包括位于反射区1031的反射部1034的情况下，该反射部1034可以和复眼透镜106固定连接。当然，如图11所示，复眼透镜106也可以设置在圆柱透镜1036上。
在一些实施例中，光源组件10也可以包括多个复眼透镜106，多个复眼透镜106与多个透射区1032对应。图23为根据一些实施例的又一种光源组件的结构图，图24为根据一些实施例的光源组件中合光部件和复眼透镜的另一种结构图。相比于图16，图23增加了复眼透镜106。例如，如图23和图24所示，光源组件10包括两个复眼透镜106，该两个复眼透镜106分别位于第一透射区1032A和第二透射区1032B。在此情况下，如图24所示，合光部件103还可以包括反射部1034。该反射部1034位于反射区1031。这里，该反射部1034可以和两个复眼透镜106固定连接。
前文主要以入射至透射区1032的激光光束为近似平行的激光光束为例进行说明，当然，本公开一些实施并不局限于此。在一些实施例中，第一透镜组102可以将激光器101发出的激光光束会聚至透射区1032。
图25为根据一些实施例的又一种光源组件的结构图。相比于图9和图16，图25中的入射至透射区1032的激光光束的光斑更小。
在一些实施例中，如图25所示，除了合光部件103、第二透镜组104以及荧光轮105外，光源组件10还包括多个激光器101以及多个第一透镜组102。多个激光器101、多个第一透镜组102、合光部件103、第二透镜组104以及荧光轮105沿第二方向Y依次排布。多个激光器101沿第一方向X方向依次排布，且多个激光器101用于发出多束激光光束。例如，如图25所示，多个激光器101包括第一激光器1011和第二激光器1012。第一激光器1011发出第一激光光束S1，第二激光器1012发出第二激光光束S2。多个第一透镜组102与多个激光器101对应，且第一透镜组102被配置为会聚激光器101发出的激光光束。例如，如图25所示，多个第一透镜组102包括第一子透镜组1021和第二子透镜组1022。第一子透镜组1021位于第一激光器1011的出光侧。第一激光器1011发出的第一激光光束S1入射至第一子透镜组1021，并经第一子透镜组1021会聚至合光部件103。第二子透镜组1022位于第二激光器1012的出光侧。第二激光器1012发出的第二激光光束S2入射至第二子透镜组1022，并经第二子透镜组1022会聚至合光部件103。
在一些实施例中，如图25所示，合光部件103包括多个反射区1031以及多个透射区1032。多个反射区1031和多个透射区1032交替排布，且多个透射区1032与多个第一透镜组102对应。经第一透镜组102会聚的激光光束(如第一激光光束S1或第二激光光束S2)入射至对应的透射区1032，并透过对应的透射区1032入射至第二透镜组104。
例如，如图25所示，多个反射区1031包括第一反射区1031A、第二反射区1031B、第三反射区1031C。多个透射区1032包括第一透射区1032A和第二透射区1032B。第一透射区1032A和第二透射区1032B分别位于相邻的两个反射区1031之间。经第一子透镜组1021会聚的第一激光光束S1入射至第一透射区1032A，并透过第一透射区1032A入射至第二透镜组104。经第二子透镜组1022会聚的第一激光光束S1入射至第二透射区1032B，并透过第二透射区1032B入射至第二透镜组104。需要说明的是，在合光部件103包括一个反射部1034的情况下，多个反射区1031为该反射部1034的不同部分。在合光部件103包括多个反射部1034的情况下，多个反射区1031分别与多个反射部1034对应。
在一些实施例中，如图25所示，合光部件103中的透射区1032位于对应的第一透镜组102的焦点处(第一焦点E和第二焦点F)。激光器101发出的激光光束经第一透镜组102会聚到焦点，并在经过该焦点后发散。在此情况下，由于经第一透镜组102会聚的激光光束在透射区1032会聚成一点，该激光光束照射在透射区1032上的区域的面积较小，因此，合光部件103可以包括较小面积的透射区1032。这样，可以最大程度地减小透射区1032的面积，降低光源组件10的光损。
在一些实施例中，如图25所示，透射区1032透过的激光光束不经过第二透镜组104 的光轴H，并且，多个透射区1032透过的激光光束照射在第二透镜组104上的位置关于第二透镜组104的光轴H对称。例如，第一透射区1032A透过的第一激光光束S1以及第二透射区1032B透过的第二激光光束S2照射在第二透镜组104上的位置关于第二透镜组104的光轴H对称。
例如，在第一激光光束S1和第二激光光束S2在第二透镜组104的靠近合光部件103的表面上形成的光斑的尺寸相同的情况下，该两束激光光束在第二透镜组104上形成的光斑关于第二透镜组104的光轴H对称。或者，在该两束激光光束在第二透镜组104上形成的光斑的尺寸不同的情况下，该两束激光光束在第二透镜组104上形成的光斑的中心位置(如图25中的第一光斑中心点C和第二光斑中心点D)关于第二透镜组104的光轴H对称。需要说明的是，激光光束在第二透镜组104上的照射位置可以指该激光光束照射在第二透镜组104上的所有位置，或者，也可以指该激光光束中的主激光光束照射在第二透镜组104上的位置。所述主激光光束指的是激光光束中光强占比最大的激光光束。
由于第二区1052的发光角度较大(0°～180°)，因此，第二区1052发出的荧光在第二透镜组104上形成的光斑可以覆盖第二透镜组104的靠近荧光轮105的表面。并且，由于第一激光光束S1和第二激光光束S2关于第二透镜组104的光轴H对称，且两束激光光束之间的距离较大。因此，经第一区1051反射的激光光束在第二透镜组104上形成的光斑也可以大致覆盖第二透镜组104的靠近荧光轮105的表面。这样，第一区1051反射的激光光束与第二区1052发出的荧光在第二透镜组104上形成的光斑的尺寸差异较小，从而提高了激光光束与荧光合光后的光斑的颜色均匀性。
并且，由于第一激光光束S1和第二激光光束S2在经第一透镜组102会聚后发散、并入射至第二透镜组104。因此，第一激光光束S1和第二激光光束S2在第二透镜组104形成的光斑的尺寸较大。这样，经第二透镜组104会聚后的激光光束在荧光轮105的第一区1051上形成的光斑的尺寸较大，从而增大了第一区1051反射的激光光束在第二透镜组104上形成的光斑的尺寸，进一步提高了激光光束与荧光合光后的光斑的颜色均匀性。
在一些实施例中，多个第一透镜组102的焦距相等。例如，如图25所示，第一子透镜组1021的第一焦距F1等于第二子透镜组1022的第二焦距F2。这样，第一激光器1011和第二激光器1012发出的激光光束在经对应的第一透镜组102会聚后，该激光光束的发散角度大致相同。第一激光光束S1和第二激光光束S2在合光部件103上形成的光斑的尺寸大致相同，进一步提高了第一激光光束S1和第二激光光束S2在整个光路系统中的对称性，以及光源组件10发出的照明光束的均匀性和对称性。
在一些实施例中，如图25所示，在平行于第二透镜组104的光轴H的方向上，第二透镜组104与荧光轮105之间的第三间距D3等于第二透镜组104的第三焦距F3。例如，荧光轮105的受光面1056位于第二透镜组104的焦平面处。需要说明的是，第二透镜组104的光轴H平行于激光器101的出光方向(如第二方向Y)。
在一些实施例中，在平行于第二透镜组104的光轴H的方向上，多个第一透镜组102与第二透镜组104之间的间距不同。例如，在平行于第二透镜组104的光轴H的方向上，第一子透镜组1021以及第二透镜组104之间的第一间距D1、与第二子透镜组1022以及第二透镜组104之间的第二间距D2不同。需要说明的是，第一透镜组102与第二透镜组104之间的所述间距指的是第一透镜组102的主平面与第二透镜组104的主平面之间的距离。本公开中的透镜与其他部件之间的间距也指的是该透镜的主平面与其他部件之间的间距。所述主平面指的是在理想光学系统中，垂轴放大率(横向放大率)等于1的两个共轭平面。
在合光部件103中的多个透射区1032分别位于对应的第一透镜组102的焦点处，且多个第一透镜组102的焦距(如第一焦距F1和第二焦距F2)相等的情况下，在平行于第二透镜组104的光轴H的方向上，多个第一透镜组102与对应的透射区1032的间距相同。在此情况下，由于合光部件103相对于第二透镜组104的光轴H倾斜设置，因此，在平行于第二透镜组104的光轴H的方向上，合光部件103中的多个透射区1032(如第一透射区1032A和第二透射区1032B)与第二透镜组104的间距不同，使得多个第一透镜组102与第二透镜组104的间距不同。
在一些实施例中，在平行于第二透镜组104的光轴H的方向上，多个第一透镜组102中任意一个第一透镜组102、与第二透镜组104之间的间距(如第一间距D1或第二间距D2)不等于第二透镜组104的第三焦距F3。
对于双透镜组成的光学系统，如果两个透镜的焦距分别为第四焦距F4和第五焦距F5，且该两个透镜之间的第四间距为D0，则该两个透镜组成的光学系统的第六焦距F6满足公式(1)：
Figure PCTCN2022119709-appb-000001
根据公式(1)可知，当两个透镜之间的第四间距D0不等于第五焦距F5时(即，D0≠F5)时，光学系统的第六焦距F6不等于第五焦距F5(即，F6≠F5)。在此情况下，如图25所示，当第一子透镜组1021与第二透镜组104之间的第一间距D1、以及第二子透镜组1022与第二透镜组104之间的第二间距D2不等于第二透镜组104的第三焦距F3时(即，D1≠F3，D2≠F3)，第一透镜组102与第二透镜组104组成的光学系统的主焦距F0不等于第三焦距F3(即，F0≠F3)。这样，当激光器101发出的激光光束通过该光学系统照射至第二透镜组104的焦平面上时，该激光光束的光斑不会会聚成一个点。
例如，如图25所示，激光器101发出的激光光束入射至第一透镜组102，并经过第一透镜组102与第二透镜组104组成的光学系统入射至荧光轮105。由于第一透镜组102与第二透镜组104组成的光学系统的主焦距F0不等于第二透镜组104的第三焦距F3，因此，位于第二透镜组104的焦平面处的荧光轮105不位于该光学系统的焦平面处。这样，当两个激光器101发出的两束激光光束经第二透镜组104会聚至在荧光轮105上时，该两束激光光束形成两个光斑，或者，形成一个较大的光斑，该两束激光光束的光斑不会会聚成一个点。
这样，可以增加激光光束照射在荧光轮105上的面积，从而在激光光束的能量不变的情况下，降低荧光轮105被激光光束照射的区域的光功率密度，利于荧光轮105的散热，以使荧光轮105具有较高的荧光激发效率。需要说明的是，光功率密度指的是单位面积入射的光功率。并且，在本公开一些实施例中，由于透射区1032的面积较小，并且经荧光轮105第一区1051反射后的激光光束的光斑较大，因此，当经第二透镜组104准直后的激光光束入射至合光部件103时，从透射区1032透过的激光光束较少，进一步减小了光源组件10的光损。
需要说明的是，图25以第一透镜组102和第二透镜组104分别仅包括一个透镜(如凸透镜)为例进行说明。当然，在一些实施例中，第一透镜组102和第二透镜组104也可以分别包括多个透镜，以提高第一透镜组102和第二透镜组104对激光光束的会聚效果。在此情况下，第一透镜组102和第二透镜组104的焦距和焦点指的是多个透镜组成的光线系统的焦距和焦点。第一透镜组102和第二透镜组104之间的间距指的是多个透镜组成的光线系统之间的间距。激光光束照射在第二透镜组104上的位置指的是该激光光束照射在第二透镜组104中的靠近激光器101的透镜上的位置。
在本公开一些实施例中，由于合光部件103出射的激光光束(如第一激光光束S1和第二激光光束S2)关于第二透镜组104的光轴H对称，因此，在该激光光束经荧光轮105反射、并通过第二透镜组104以及合光部件103入射至第三透镜组108后，该激光光束在第三透镜组108上均匀分布。这样，当该激光光束入射至光导管210时，该激光光束可以关于光导管210的入光口的中心轴线对称，从而该激光光束在光导管210中上、下表面上的反射情况大致相同，从光导管210出射的激光光束较为均匀，减小了激光光束和荧光在光导管210出口处的能量分布差异，提高了光源组件10发出的照明光束颜色均匀性，提高了投影画面的显示效果。
本领域的技术人员将会理解，本发明的公开范围不限于上述具体实施例，并且可以在不脱离本申请的精神的情况下对实施例的某些要素进行修改和替换。本申请的范围受所附权利要求的限制。

Claims (20)

  1. 一种激光投影设备，包括：
    光源组件，被配置发出照明光束；
    光机，被配置为将所述光源组件发出的照明光束进行调制以获得投影光束；以及
    镜头，被配置为将所述投影光束进行成像；
    所述光源组件包括：
    至少一个激光器，被配置为发出激光光束；
    合光部件，位于所述至少一个激光器的出光侧，且相对于所述至少一个激光器的出光方向倾斜设置，所述合光部件包括：
    反射区，被配置为反射入射的激光光束和荧光；以及
    至少一个透射区，被配置为透射所述至少一个激光器发出的激光光束；以及
    荧光轮，位于所述合光部件的远离所述至少一个激光器的一侧，所述荧光轮包括：
    第一区，被配置为将经所述至少一个透射区透射的激光光束漫反射至所述合光部件；以及
    第二区，被配置为在所述至少一个透射区透射的激光光束的照射下，受激产生荧光；
    随所述荧光轮的旋转，所述至少一个透射区透射的激光光束分别照射所述第一区和所述第二区，经所述第一区反射的激光光束和所述第二区发出的荧光分别入射至所述合光部件，并经所述合光部件反射至所述光源组件的出光口，从所述光源组件的所述出光口出射的激光光束和荧光构成所述照明光束。
  2. 根据权利要求1所述的激光投影设备，其中，所述至少一个透射区包括一个透射区，所述透射区位于所述合光部件的中心，且所述反射区围绕所述透射区设置。
  3. 根据权利要求1所述的激光投影设备，其中，所述至少一个透射区包括多个透射区，且多个透射区间隔排布，所述至少一个激光器包括一个激光器，所述光源组件还包括:
    转折镜组，位于所述合光部件与所述激光器之间，所述转折镜组被配置为将所述激光器发出的激光光束分成多束激光光束，所述多束激光光束与所述多个透射区对应。
  4. 根据权利要求3所述的激光投影设备，其中，
    所述多个透射区包括：
    第一透射区，位于所述反射区的靠近所述激光器的一侧；以及
    第二透射区，位于所述反射区的远离所述激光器的一侧，所述反射区位于所述第一透射区和所述第二透射区之间；
    所述转折镜组包括：
    第一反射镜组，被配置为将所述激光器发出的激光光束的一部分反射至所述第一透射区；以及
    第二反射镜组，被配置为将所述激光器发出的激光光束的另一部分反射至所述第二透射区。
  5. 根据权利要求1所述的激光投影设备，其中，所述至少一个透射区包括多个透射区，所述至少一个激光器包括多个激光器，所述多个激光器与所述多个透射区对应。
  6. 根据权利要求5所述的激光投影设备，其中，
    所述多个激光器包括：
    第一激光器，被配置为发出第一激光光束；以及
    第二激光器，被配置为发出第二激光光束；
    所述多个透射区包括：
    第一透射区，位于所述反射区的靠近所述多个激光器的一侧，所述第一透射区被配置为透射所述第一激光光束；以及
    第二透射区，位于所述反射区的远离所述多个激光器的一侧，所述第二透射区被配置为透射所述第二激光光束，所述反射区位于所述第一透射区和所述第二透射区之间。
  7. 根据权利要求1至6中任一项所述的激光投影设备，其中，所述合光部件包括：
    反射部，位于所述反射区，所述反射部被配置为反射所述荧光轮反射的激光光束和所 述荧光轮发出的荧光；以及
    至少一个透射部，位于所述至少一个透射区，所述至少一个透射部被配置为透过所述至少一个激光器发出的激光光束，且反射所述荧光轮反射的激光光束和所述荧光轮发出的荧光。
  8. 根据权利要求7所述的激光投影设备，其中，所述反射部包括：
    反射面，为所述反射部与所述荧光轮相对的表面，所述反射面呈曲面，且所述反射面被配置为会聚来自所述荧光轮的荧光以及激光光束、并将所述荧光以及所述激光光束反射至所述光源组件的所述出光口。
  9. 根据权利要求1至6中任一项所述的激光投影设备，其中，所述合光部件满足以下之一：
    所述合光部件包括：
    第一基板；
    反射膜，设置在所述第一基板上、且位于所述反射区；以及
    二向色膜，设置在所述第一基板上、且位于所述至少一个透射区；或者
    所述合光部件包括：
    第一基板；
    反射膜，设置在所述第一基板上、且位于所述反射区；以及
    通孔，设置在所述第一基板上、且位于所述至少一个透射区。
  10. 根据权利要求1至9中任一项所述的激光投影设备，其中，所述光源组件包括：
    复眼透镜，设置在所述合光部件上、且位于所述至少一个透射区，所述复眼透镜被配置为匀化和整形入射的激光光束的光斑，所述复眼透镜包括：
    衬底；以及
    多个微透镜，设置在所述衬底上、且阵列排布，所述多个微透镜被配置为匀化和整形入射的激光光束的光斑。
  11. 根据权利要求1至10中任一项所述的激光投影设备，其中，所述光源组件还包括：
    第一透镜组，位于所述合光部件和所述至少一个激光器之间，所述第一透镜组被配置为缩小从所述至少一个激光器发出的激光光束的光斑；
    第二透镜组，位于所述合光部件与所述荧光轮之间，所述第二透镜组被配置为将所述至少一个透射区透射的激光光束会聚至所述荧光轮；以及
    第三透镜组，位于所述合光部件的出光侧，所述第三透镜组被配置为会聚经所述合光部件反射的激光光束和荧光。
  12. 根据权利要求1至11中任一项所述的激光投影设备，其中，所述荧光轮包括：
    第二基板；
    荧光材料层，设置在所述第二基板上、且位于所述第二区；
    第一反射层，设置在所述第二基板上、且位于所述第一区；以及
    第二反射层，设置在所述第二基板和所述荧光材料层之间、且位于所述第二区。
  13. 一种激光投影设备，包括：
    光源组件，被配置发出照明光束；
    光机，被配置为将所述光源组件发出的照明光束进行调制以获得投影光束；以及
    镜头，被配置为将所述投影光束进行成像；
    所述光源组件包括：
    多个激光器，被配置为发出激光光束；
    多个第一透镜组，与所述多个激光器对应，所述多个第一透镜组被配置为会聚所述多个激光器发出的激光光束；
    合光部件，位于所述多个激光器的出光侧，且相对于所述多个激光器的出光方向倾斜设置，所述合光部件包括：
    反射区，被配置为反射入射的激光光束；以及
    多个透射区，与所述多个第一透镜组对应、且多个透射区间隔排布，所述多个透射区被配置为透射经所述多个第一透镜组会聚的激光光束；
    第二透镜组，位于所述合光部件的远离所述多个激光器的一侧，所述第二透镜组被配置为会聚所述多个透射区透射的激光光束，所述多个透射区透射的激光光束照射在所述第二透镜组上的位置关于所述第二透镜组的光轴对称；以及
    荧光轮，位于所述第二透镜组的远离所述合光部件的一侧，所述荧光轮包括：
    第一区，被配置为将经所述第二透镜组会聚的激光光束反射至所述第二透镜组；以及
    第二区，被配置为在所述第二透镜组会聚的激光光束的照射下，受激产生荧光；
    随所述荧光轮的旋转，所述第二透镜组会聚的激光光束分别照射所述第一区和所述第二区，经所述第一区反射的激光光束和所述第二区发出的荧光分别经过所述第二透镜组入射至所述合光部件，并经所述合光部件反射至所述光源组件的出光口，从所述光源组件的所述出光口出射的激光光束和荧光构成所述照明光束。
  14. 根据权利要求13所述的激光投影设备，其中，
    所述多个激光器包括：
    第一激光器，被配置为发出第一激光光束；以及
    第二激光器，被配置为发出第二激光光束；
    所述多个第一透镜组包括：
    第一子透镜组，位于所述第一激光器的出光侧，所述第一子透镜组被配置为会聚所述第一激光光束；以及
    第二子透镜组，位于所述第二激光器的出光侧，所述第二子透镜组被配置为会聚所述第二激光光束；
    所述多个透射区包括：
    第一透射区，与所述第一子透镜组对应，所述第一透射区被配置为透射经所述第一子透镜组会聚的第一激光光束；以及
    第二透射区，与所述第二子透镜组对应，所述第二透射区被配置为透射经所述第二子透镜组会聚的第二激光光束；其中
    所述第一透射区以及所述第二透射区透射的激光光束照射在所述第二透镜组上的位置关于所述第二透镜组的光轴对称。
  15. 根据权利要求13或14所述的激光投影设备，其中，所述多个透射区分别位于所述多个第一透镜组的焦点处。
  16. 根据权利要求13至15中任一项所述的激光投影设备，其中，在平行于所述第二透镜组的光轴的方向上，所述多个第一透镜组与所述第二透镜组的间距中的至少一个不等于所述第二透镜组的焦距，所述荧光轮位于所述第二透镜组的焦平面处。
  17. 根据权利要求13至16中任一项所述的激光投影设备，其中，所述多个第一透镜组的焦距相等。
  18. 根据权利要求13至17中任一项所述的激光投影设备，其中，所述光源组件还包括光扩散结构，所述光扩散结构设置在所述合光部件的靠近所述多个激光器的表面，且所述光扩散结构被配置为匀化入射至所述合光部件的激光光束。
  19. 根据权利要求13至18中任一项所述的激光投影设备，其中，所述光源组件还包括第三透镜组，所述第三透镜组位于所述合光部件的出光侧，且所述第三透镜组被配置为会聚经所述合光部件反射的激光光束和荧光。
  20. 根据权利要求13至19中任一项所述的激光投影设备，其中，所述荧光轮包括：
    第二基板；
    荧光材料层，设置在所述第二基板上、且位于所述第二区；
    第一反射层，设置在所述第二基板上、且位于所述第一区；以及
    第二反射层，设置在所述第二基板和所述荧光材料层之间、且位于所述第二区。
PCT/CN2022/119709 2021-09-27 2022-09-19 激光投影设备 Ceased WO2023045882A1 (zh)

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