WO2023005546A1 - 激光投影设备 - Google Patents

激光投影设备 Download PDF

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Publication number
WO2023005546A1
WO2023005546A1 PCT/CN2022/101529 CN2022101529W WO2023005546A1 WO 2023005546 A1 WO2023005546 A1 WO 2023005546A1 CN 2022101529 W CN2022101529 W CN 2022101529W WO 2023005546 A1 WO2023005546 A1 WO 2023005546A1
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WIPO (PCT)
Prior art keywords
light
group
emitting
laser beam
laser
Prior art date
Application number
PCT/CN2022/101529
Other languages
English (en)
French (fr)
Inventor
罗李浩男
李巍
Original Assignee
青岛海信激光显示股份有限公司
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 CN202121778764.5U external-priority patent/CN215181380U/zh
Priority claimed from CN202110875070.1A external-priority patent/CN113448159A/zh
Application filed by 青岛海信激光显示股份有限公司 filed Critical 青岛海信激光显示股份有限公司
Priority to CN202280052559.1A priority Critical patent/CN118020016A/zh
Publication of WO2023005546A1 publication Critical patent/WO2023005546A1/zh
Priority to US18/424,233 priority patent/US20240248382A1/en

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/10—Beam splitting or combining systems
    • G02B27/14—Beam splitting or combining systems operating by reflection only
    • 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
    • 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
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2013—Plural light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2066—Reflectors in illumination beam
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2073—Polarisers in the lamp house
    • 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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/10—Simultaneous recording or projection
    • G03B33/12—Simultaneous recording or projection using beam-splitting or beam-combining systems, e.g. dichroic mirrors

Definitions

  • the present disclosure relates to the technical field of laser projection, in particular to a laser projection device.
  • MCL Multi-Chip Laser Diode
  • the laser projection device includes a light source and a fly-eye lens.
  • the light source includes a laser and a combination lens group.
  • the laser includes a plurality of light emitting components arranged in an array.
  • the plurality of light emitting components include a plurality of first light emitting components, a plurality of second light emitting components, and a plurality of third light emitting components.
  • the plurality of first light emitting components emits a first laser beam
  • the plurality of second light emitting components emits a second laser beam
  • the plurality of third light emitting components emits a third laser beam.
  • the plurality of first light emitting components, the plurality of second light emitting components and the plurality of third light emitting components are respectively arranged in an array to form a plurality of light emitting groups.
  • the light-combining lens group is located on the light-emitting optical path of the laser.
  • the light-combining lens group is configured to combine the laser beams emitted by at least two light-emitting groups in the plurality of light-emitting groups to the same position, and then emit the laser beams in a predetermined direction.
  • the fly-eye lens is located on the light emitting side of the light source, and is configured to homogenize the laser beam emitted by the light source. The size of the light spot after combining the beams by the light combining mirror matches the etendue of the fly-eye lens.
  • 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 a timing diagram of a light source in a laser projection device according to some embodiments.
  • FIG. 4 is an optical path diagram of a light source, an optical machine, 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 the position figure that a tiny mirror mirror swings in the digital micromirror device among Fig. 5;
  • Fig. 7 is a working schematic diagram of a tiny mirror according to some embodiments.
  • FIG. 8 is another optical path diagram of a light source, an optical machine, and a lens in a laser projection device according to some embodiments;
  • Figure 9 is a structural diagram of a laser according to some embodiments.
  • Fig. 10 is a light path diagram of a light source according to some embodiments.
  • Figure 11 is a block diagram of another laser according to some embodiments.
  • FIG. 12 is a structural diagram of another laser according to some embodiments.
  • Fig. 13 is an optical path diagram of a light source corresponding to the laser in Fig. 11;
  • Fig. 14 is an optical path diagram of another light source corresponding to the laser in Fig. 11;
  • Fig. 15 is an optical path diagram of a light source corresponding to the laser in Fig. 12;
  • FIG. 16 is an optical path diagram of another light source corresponding to the laser in FIG. 12 .
  • 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 When describing some embodiments, the expression “connected” and its derivatives may be used. For example, the term “connected” 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 embodiments disclosed herein are not necessarily limited by the context herein.
  • 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).
  • “parallel” includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; Deviation within 5°.
  • “Equal” includes absolute equality and approximate equality, where the difference between the two that may be equal is less than or equal to 5% of either within acceptable tolerances for approximate equality, for example.
  • Fig. 1 is a structural diagram of a laser projection device according to some embodiments.
  • the laser projection device 1000 includes a housing 40 (only part of the housing 40 is shown in FIG. 1 ), a light source 1 assembled in the housing 40 , an optical engine 20 , and a lens 30 .
  • the light source 1 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 1 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 1 , the light engine 20 and the lens 30 are sequentially connected along the beam propagation direction, and each is wrapped by a corresponding housing.
  • the housings of the light source 1 , the light engine 20 and the lens 30 support the corresponding optical components and make the optical components meet certain sealing or airtight requirements.
  • the light source 1 is hermetically sealed through its corresponding housing, which can improve the problem of light decay of the light source 1 .
  • Fig. 2 is a partial structural diagram of a laser projection device according to some embodiments.
  • the light source 1 and the optical machine 20 are arranged sequentially along the M direction
  • the optical machine 20 and the lens 30 are sequentially arranged along the N direction
  • the M direction and the N direction are perpendicular to each other.
  • the emission direction of the projection beam of the laser projection apparatus 1000 is substantially perpendicular to the emission direction of the illumination beam of the laser projection apparatus 1000 (refer to the M direction shown in FIG. 2 ).
  • this connection structure can adapt to the characteristics of the optical path of the reflective light valve in the optical machine 20 , and on the other hand, it is also beneficial to shorten the length of the optical path in one dimension, which is beneficial to the structural arrangement of the laser projection device 1000 .
  • the light source 1, the light engine 20, and the lens 30 are arranged in a dimensional direction (for example, the M direction perpendicular to the direction N)
  • the length of the optical path in this dimensional direction will be very long, which is not conducive to the laser projection device. 1000's of structural arrangements.
  • the reflective light valve will be described later.
  • the light source 1 can sequentially provide the three primary color lights (other color lights can also be added on the basis of the three primary color lights), and then due to the persistence of vision of the human eye, what the human eye sees is the three primary color lights Mixed to form white light.
  • the light source 1 outputs three primary colors of light at the same time and continuously emits white light.
  • the light source 1 includes a laser, which can emit laser light of at least one color, such as blue laser light.
  • FIG. 3 is a timing diagram of a light source in a laser projection device according to some embodiments.
  • the light source 1 sequentially outputs blue, red and green laser beams.
  • the light source 1 outputs blue light beams in the first time period T1, outputs red light beams in the second time period T2, and outputs green light beams in the third time period T3.
  • the time for the light source 1 to complete the sequential output of each primary color light beam is the period for the light source 1 to output the primary color light beams.
  • the light source 1 performs a sequential output of each primary color light beam once, therefore, the display period of one frame of target image is equal to the period of light source 1 outputting primary color light beams, equal to the first time period T1, the second The sum of the time period T2 and the third time period T3. Due to the persistence of vision of the human eye, the human eye cannot distinguish the color of light at a certain moment, and what it perceives is still mixed white light.
  • Fig. 4 is an optical path diagram of a light source, an optical engine and a lens in a laser projection device according to some embodiments.
  • the optical machine 20 includes: a diffuser 2 , a first lens assembly 3 , a uniform light component 4 , a second lens assembly 5 , a digital micromirror device 6 and a prism assembly 7 .
  • the diffusion sheet 2 is located on the light emitting side of the light source 1 and configured to diffuse the illumination beam from the light source 1 .
  • the first lens assembly 3 is located on the light emitting side of the diffusion sheet 2 and is configured to converge the illumination beam diffused by the diffusion sheet 2 .
  • the homogenizing component 4 is located on the light emitting side of the first lens assembly 3 and is configured to homogenize the illumination beam converged by the first lens assembly 3 .
  • the second lens assembly 5 is located on the light emitting side of the light homogenizing component 4 , and the second lens assembly 5 is configured to transmit the illumination beam to the prism assembly 7 .
  • the prism assembly 7 reflects the illumination beam to the digital micromirror device 6 .
  • the digital micromirror device 6 modulates the illumination beam to obtain a projection beam, and reflects the modulated projection beam to the lens 30 .
  • the dodging component 4 includes a first fly-eye lens 41 and a second fly-eye lens 42 oppositely arranged.
  • the light incident surface of the first fly-eye lens 41 and the light-emitting surface of the second fly-eye lens 42 include tiny lens units arranged in an array.
  • the illuminating beam emitted by the light source 1 is focused to the center of each tiny lens unit of the second fly-eye lens 42 through the first fly-eye lens 41, and is imaged on the digital micromirror device 6 after passing through the second lens assembly 5 and the prism assembly 7 in sequence, thereby Improve the uniformity and brightness of the lighting beam.
  • the digital micromirror device 6 uses the image signal to modulate the illumination beam provided by the light source 1, that is, to control the projection beam to display different colors and brightness for different pixels of the image to be displayed, so as to finally form an optical image, so
  • the digital micromirror device 6 is also called a light modulation device or a light valve.
  • the light modulation device or light valve
  • the light modulation device can be divided into a transmissive light modulation device (or light valve) or a reflective light modulation device (or light valve).
  • the digital micromirror device 6 shown in FIG. 4 reflects the illumination 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 optical machine 20 can be called a single-chip system.
  • the optical machine 20 can be called a three-chip system.
  • the light source 1 When the optical machine 20 is a three-chip system, the light source 1 outputs three primary colors of light at the same time to continuously emit white light.
  • the light modulation device can include many types, such as Liquid Crystal on Silicon (LCOS), Liquid Crystal Display (LCD) or digital micromirror Device (Digital Micromirror Device, DMD). Since in some embodiments of the present disclosure, the optical machine 20 shown in FIG. 4 applies a digital light processing (Digital Light Processing, DLP) projection architecture, therefore, the light modulation device (or light valve) in some embodiments of the present disclosure is Digital Micromirror Device (DMD).
  • DLP Digital Light Processing
  • DMD Digital Micromirror Device
  • FIG. 5 is an arrangement diagram of tiny reflective mirrors in a digital micromirror device according to some embodiments.
  • FIG. 6 is a diagram of a swinging position of a tiny mirror in the digital micromirror device in FIG. 5 .
  • Fig. 7 is a schematic diagram of the operation of the tiny mirror according to some embodiments.
  • the digital micromirror device 6 includes thousands of tiny reflective mirrors 601 that can be individually driven to rotate. These tiny reflective mirrors 601 are arranged in an array, and each tiny reflective mirror 601 corresponds to of a pixel. As shown in FIG. 6 , in the DLP projection architecture, each tiny mirror 601 is equivalent to a digital switch, which can swing within the range of ⁇ 12° or ⁇ 17° under the action of external force.
  • the light reflected by the tiny mirror 601 at a negative deflection angle is called OFF light, and the OFF light is invalid light, which usually hits the casing 40 of the laser projection device 1000 and the casing of the optical machine 20. absorbed on the body or on the light absorbing unit 400 .
  • the light reflected by the tiny reflector 601 at a positive deflection angle is called ON light, and the ON light is that the tiny reflector 601 on the surface of the digital micromirror device 6 receives the illumination light beam and enters the lens 30 through a positive deflection angle. Effective beam for projection imaging.
  • the open state of the tiny reflective mirror 601 is the state that the tiny reflective mirror 601 is in and can be maintained when the illumination light beam emitted by the light source 1 is reflected by the tiny reflective mirror 601 and can enter the lens 30, that is, the tiny reflective mirror 601 is in a positive deflection angle. state.
  • the closed state of the tiny reflective mirror 601 is the state that the tiny reflective mirror 601 is in and can be maintained when the illumination light beam emitted by the light source 1 is reflected by the tiny reflective mirror 601 and does not enter the lens 30, that is, the tiny reflective mirror 601 is in a negative deflection angle. state.
  • the state at +12° is the on state
  • the state at -12° is the off state
  • the deflection between -12° and +12° The angle is not used in practice, and the actual working state of the tiny mirror 601 is only the on state and the off state.
  • the state at +17° is the on state
  • the state at -17° is the off state.
  • part or all of the tiny mirrors 601 will be switched once between the on state and the off state, so as to realize the display of one frame of images according to the duration time of the tiny mirrors 601 in the on state and the off state respectively.
  • the tiny reflective mirror 601 corresponding to gray scale 0 is in the off state during the entire display period of a frame of image
  • the tiny reflective mirror 601 corresponding to gray scale 255 is in the off state during
  • the whole display period of a frame of image is in the on state
  • the tiny mirror 601 corresponding to the gray scale 127 is in the on state for half of the display period of a frame of image, and the other half of the time is in the off state.
  • the state and the maintenance time of each state in the display period of a frame image are controlled by the image signal of each tiny reflective mirror 601 in the digital micromirror device 6, which can control the brightness (gray scale) of the corresponding pixel of the tiny reflective mirror 601. ), so as to modulate the illumination beam projected to the digital micromirror device 6 .
  • Fig. 8 is another optical path diagram of a light source, an optical engine and a lens in a laser projection device according to some embodiments.
  • the lens 30 includes a combination of multiple lenses, which are generally divided into groups, such as three-stage front group, middle group and rear group, or two-stage front group and rear group.
  • the front group is the lens group close to the light-emitting side of the laser projection device 1000 (that is, the side of the lens 30 in FIG.
  • the lens 30 is a lens group on the side close to the optical engine 20 along 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 illustrated by taking the laser projection device 1000 adopting a DLP projection architecture, and the light modulation device in the optical machine 20 being a digital micromirror device 6 as an example.
  • the light source 1 according to some embodiments of the present disclosure is described in detail below.
  • Fig. 9 is a structural diagram of a laser according to some embodiments
  • Fig. 10 is an optical path diagram of a light source according to some embodiments.
  • the light source 1 includes: a laser 100 and a combination lens group 200 .
  • the laser 100 may be an MCL laser, and the MCL laser packages a plurality of lamp beads on a substrate to form a surface light source output.
  • the laser 100 shown in FIG. 9 includes a metal substrate 101 on which a plurality of lamp beads 102 are packaged.
  • the plurality of lamp beads 102 can be connected in series or driven in parallel in rows or columns.
  • Pins 103 protrude from both sides of the metal substrate 101 , and the lamp bead 102 can be driven to emit light by connecting these pins 103 with electrical signals.
  • the laser 100 includes a plurality of light emitting components 10 , and each light emitting component 10 is disposed in a corresponding lamp bead 102 .
  • the plurality of light emitting parts 10 are configured to emit laser beams of at least two colors.
  • the light emitting components 10 emitting laser beams of the same color are arranged in an array to form corresponding light emitting groups 140 .
  • a plurality of light emitting components 10 in the light emitting group 140 are arranged in a matrix of M rows and N columns; here, M and N are integers greater than or equal to 1, and at least one of M and N is greater than 1.
  • the first part (110 in FIG. 10) of the plurality of light-emitting components 10 is arranged in a matrix of 2 ⁇ 2
  • the second part of the plurality of light emitting components 10 is arranged in a 2 ⁇ 2 matrix
  • the third part of the plurality of light emitting components 10 is arranged in a 2 ⁇ 3 matrix matrix.
  • the plurality of light emitting components 10 shown in FIG. 10 can also be arranged in a 4 ⁇ 6, 3 ⁇ 5, or 4 ⁇ 5 array.
  • the overall light emitting power of the laser 100 corresponding to the plurality of light emitting components 10 in different arrays is different.
  • the following mainly takes the multiple light emitting components 10 of the laser 100 arranged in a 2 ⁇ 7 matrix as an example for illustration.
  • a plurality of light emitting components 10 emitting laser beams of different colors may be packaged in one laser 100 .
  • laser beams of multiple colors can be emitted by one laser 100 , thereby emitting light of three primary colors.
  • the laser beams emitted by the light emitting components 10 have good directivity, the laser beams emitted by a plurality of light emitting components 10 may not overlap with each other.
  • the light-combining lens group 200 is located on the light-emitting side of the laser 100 and is configured to combine the laser beams emitted by at least two light-emitting groups 140 in the plurality of light-emitting groups 140 to the same position. Then shoot in the same direction.
  • the light combining mirror group 200 includes reflective mirrors and light combining mirrors (such as dichroic mirrors).
  • the reflector is configured to reflect the laser beam to turn the light path.
  • the light combining mirror is configured to combine the laser beams of different colors. In this way, by arranging the reflecting mirror and the light combining mirror, the laser beams emitted by the light-emitting group 140 can be combined to the same position, so that the spots of different laser beams can be overlapped, thereby reducing the size of the overlapped spots.
  • Figure 11 is a block diagram of another laser according to some embodiments.
  • Fig. 12 is a block diagram of yet another laser according to some embodiments.
  • the laser 100 includes a first light emitting component 11 , a second light emitting component 12 and a third light emitting component 13 .
  • the first light emitting part 11 emits a first laser beam
  • the second light emitting part 12 emits a second laser beam
  • the third light emitting part 13 emits a third laser beam.
  • the wavelengths of the laser beams emitted by the first light emitting component 11 , the second light emitting component 12 and the third light emitting component 13 are different.
  • the light emitting component 10 is a laser chip.
  • the first light emitting component 11 , the second light emitting component 12 and the third light emitting component 13 are one of a red laser chip, a green laser chip and a blue laser chip.
  • a plurality of first light-emitting components 11 are arranged in an array to form a first light-emitting group 110 , and the first light-emitting group 110 emits the first laser beam.
  • a plurality of second light emitting components 12 are arranged in an array to form a second light emitting group 120, and the second light emitting group 120 emits the second laser beam.
  • a plurality of third light emitting components 13 are arranged in an array to form a third light emitting group 130, and the third light emitting group 130 emits the third laser beam.
  • the first luminescence group 110 , the second luminescence group 120 and the third luminescence group 130 are arranged side by side along the first direction X of the laser 100 .
  • the first direction X is the direction in which the rows of the array formed by the plurality of light emitting components 10 are located.
  • the light combining mirror group 200 includes a first reflective mirror A1 , a second reflective mirror A2 , a first light combining mirror B1 and a second light combining mirror B2 .
  • the first reflector A1 is located on the light-emitting side of the first light-emitting group 110, the second light-emitting group 120, and the third light-emitting group 130, and is configured to reflect the first laser beam emitted by the first light-emitting group 110 and the first laser beam emitted by the second light-emitting group 120.
  • the second mirror A2 is located on the light emitting side of the first mirror A1 and is configured to reflect the first laser beam.
  • the first light combining mirror B1 is located at the intersection of the light emitted by the second reflector A2 and the light emitted by the first reflector A1, and is configured to transmit the first laser beam and reflect the second laser beam.
  • the second light combining mirror B2 is located at the intersection of the outgoing light of the first light combining mirror B1 and the outgoing light of the first reflecting mirror A1, and is configured to transmit the first laser beam and the second laser beam, and reflect the third laser beam.
  • the second reflecting mirror A2, the first light combining mirror B1 and the second light combining mirror B2 are arranged parallel to each other.
  • the laser beams emitted by the first light-emitting group 110, the second light-emitting group 120 and the third light-emitting group 130 are incident on the first reflector A1 and reflected by the first reflector A1.
  • the first laser beam emitted by the first light-emitting group 110 is reflected by the first reflector A1 to the second reflector A2, then reflected by the second reflector A2 to the first light-combining mirror B1, and sequentially transmitted through the first light-combining mirror After the mirror B1 and the second combining mirror B2, the light is emitted to the light outlet of the light source 1 .
  • the second laser beam emitted by the second light-emitting group 120 is reflected by the first reflector A1 to the first light-combining mirror B1, then reflected by the first light-combining mirror B1 to the second light-combining mirror B2, and then passed through the second light-combining mirror B2.
  • the mirror B2 transmits to the light outlet of the light source 1 .
  • the third laser beam emitted by the third light-emitting group 130 is reflected by the first reflector A1 to the second light-combining mirror B2 , and then reflected to the light outlet of the light source 1 by the second light-combining mirror B2 .
  • the first laser beam emitted by the first light-emitting group 110, the second laser beam emitted by the second light-emitting group 120, and the third laser beam of the third light-emitting group 130 can be combined into a beam.
  • the spot positions of the three laser beams are roughly the same, thereby reducing the size of the spot formed by the three laser beams.
  • the light spot of small size is convenient to match with dodging component 4 (referring to Fig. 4) (that is, the spot size matches the etendue (Etendue) of fly-eye lens), thereby improving the dodging effect of dodging component 4, and The display effect of the laser projection device 1000.
  • the first lighting group 110 includes a first sub-group 1101 and a second sub-group 1102 . As shown in FIG. 11 , the first sub-light emitting group 1101 and the second sub-light emitting group 1102 are arranged side by side, or, as shown in FIG. 12 , the first sub-light emitting group 1101 and the second sub-light emitting group 1102 are arranged side by side.
  • the first sub-light emitting group 1101 and the second sub-light emitting group 1102 are arranged in a row along the first direction X.
  • the second luminous group 120 and the third luminous group 130 are arranged in another row along the first direction X.
  • the first sub-light-emitting group 1101 and the second light-emitting group 120 are arranged in one row along the second direction Y, and the second sub-light-emitting group 1102 and the third light-emitting group 130 are arranged in another row along the second direction Y.
  • the second direction Y is the direction in which the columns of the array formed by the plurality of light emitting components 10 are located, and the second direction Y and the first direction X are perpendicular to each other.
  • the number of rows of the array formed by the first light-emitting group 110 is equal to the number of rows of the array formed by the second light-emitting group 120 and the third light-emitting group 130, and the number of rows formed by the first light-emitting group 110
  • the number of columns in the array is equal to the number of columns in the array formed by the second light-emitting group 120 and the third light-emitting group 130 , so that the light-emitting components 10 can be arranged in a regular array.
  • FIG. 13 is an optical path diagram of a light source corresponding to the laser in FIG. 11 .
  • the light combining lens group 200 includes a first light combining lens group 201 and a second light combining lens group 202 .
  • the first light combining mirror group 201 includes a first reflecting mirror A1 and a first light combining mirror B1 , and the first light combining mirror group 201 is configured to combine the laser beams emitted from the first light emitting group 110 and the third light emitting group 130 .
  • the second combination mirror group 202 includes a second reflector A2, a third reflector A3, and a second combination mirror B2, and the second combination mirror group 202 is configured to combine the The laser beam is combined with the second laser beam emitted by the second light emitting group 120 .
  • the first mirror A1 is located at the light emitting side of the first light emitting group 110 and is configured to reflect the first laser beam.
  • the second mirror A2 is located at the light emitting side of the second light emitting group 120 and is configured to reflect the second laser beam.
  • the third mirror A3 is located at the light emitting side of the second mirror A2 and is configured to reflect the second laser beam.
  • the first light-combining mirror B1 is located at the intersection of the outgoing light of the third light-emitting group 130 and the outgoing light of the first reflective mirror A1 , and is configured to reflect the third laser beam and transmit the first laser beam.
  • the second light combining mirror B2 is located at the intersection of the outgoing light of the first light combining mirror B1 and the outgoing light of the third reflecting mirror A3, and is configured to transmit the second laser beam, reflect the first laser beam and the third laser beam.
  • the first laser beam emitted by the first light-emitting group 110 is incident on the first reflector A1, reflected by the first reflector A1 to the first light-combining mirror B1, and passed through the first light-combining mirror. After B1 is transmitted to the second light combining mirror B2, it is reflected by the second light combining mirror B2 to the light outlet of the light source 1 .
  • the second laser beam emitted by the second light-emitting group 120 is incident on the second reflector A2, reflected by the second reflector A2 to the third reflector A3, and then reflected by the third reflector A3 to the second light combining mirror After B2, it is transmitted to the light outlet of the light source 1 through the second light combining mirror B2.
  • the third laser beam emitted by the third light-emitting group 130 is incident on the first light combining mirror B1, reflected by the first light combining mirror B1 to the second light combining mirror B2, and then reflected to the light source 1 by the second light combining mirror B2 light outlet.
  • the first laser beam emitted by the first light-emitting group 110 and the third laser beam emitted by the third light-emitting group 130 are combined by the first light-combining mirror B1, so that the spots of the two laser beams overlap at the same position, thereby The area of the spot formed by the first laser beam and the third laser beam is reduced.
  • the second laser beam emitted by the second light-emitting group 120 can be combined with the combined first laser beam and third laser beam through the second light combining mirror B2 Combining the beams further reduces the area of the spot formed by the first laser beam, the second laser beam and the third laser beam.
  • FIG. 14 is an optical path diagram of another light source corresponding to the laser in FIG. 11 .
  • the positions of the second reflective mirror A2 and the first light combining mirror B1 in the light combining mirror group 200 in FIG. 13 can be exchanged. That is to say, the second reflector A2 is located at the light emitting side of the third light emitting group 130 and is configured to reflect the third laser beam.
  • the first light combining mirror B1 is located at the junction of the light emitted by the first reflective mirror A1 and the light emitted by the second light emitting group 120 , and is configured to transmit the first laser beam and reflect the second laser beam.
  • the third mirror A3 is configured to reflect the first laser beam and the second laser beam
  • the second light combining mirror B2 is configured to transmit the first laser beam and the second laser beam beam, and reflect the third laser beam.
  • the first light combining lens group 201 is configured to combine the laser beams emitted by the first light emitting group 110 and the second light emitting group 120 .
  • the second light-combining lens group 202 is configured to combine the laser beam combined by the first light-combining lens group 201 with the third laser beam emitted by the third light-emitting group 130 .
  • the first laser beam emitted by the first light-emitting group 110 is incident on the first reflector A1, reflected by the first reflector A1 to the first light combining mirror B1, and then transmitted through the first light combining mirror B1 is then incident on the third mirror A3.
  • the first laser beam incident on the third reflector A3 is reflected by the third reflector A3 to the second light combining mirror B2, and then transmitted to the light outlet of the light source 1 through the second light combining mirror B2.
  • the second laser beam emitted by the second light-emitting group 120 is incident on the first light combining mirror B1, it is reflected by the first light combining mirror B1 to the third reflector A3, and then reflected by the third reflector A3 to the second light combiner. After the light mirror B2, it is transmitted to the light outlet of the light source 1 through the second light combining mirror B2.
  • the third laser beam emitted by the third light-emitting group 130 is incident on the second reflector A2, it is reflected by the second reflector A2 to the second light-combining mirror B2, and then reflected to the output light of the light source 1 by the second light-combining mirror B2. mouth.
  • the first laser beam emitted by the first light-emitting group 110 and the second laser beam emitted by the second light-emitting group 120 are combined by the first light-combining mirror B1, so that the spots of the two laser beams overlap at the same position, thereby The area of the spot formed by the first laser beam and the second laser beam is reduced.
  • the third laser beam emitted by the third light-emitting group 130 can be combined with the combined first laser beam and the second laser beam through the second light combining mirror B2 Combining the beams further reduces the area of the spot formed by the first laser beam, the second laser beam and the third laser beam.
  • the laser beams of different colors can be respectively Combining beams, compared with combining three or more different color beams at one time, makes the positions of the spots of different colored laser beams approximately the same, thereby reducing the size of the spots formed by the three laser beams and improving the combination. beam accuracy.
  • the present disclosure is not limited thereto.
  • the second light-emitting group 120 and the first sub-light-emitting group 1101 are arranged in a row along the first direction X.
  • the third light-emitting group 130 and the second sub-light-emitting group 1102 are arranged in another row along the first direction X.
  • the first sub-light emitting group 1101 and the second sub-light emitting group 1102 are arranged in a row along the second direction Y.
  • the second luminous group 120 and the third luminous group 130 are arranged in another column along the second direction Y.
  • the number of rows of the array formed by the first sub-light-emitting group 1101 and the second light-emitting group 120 is equal to the number of rows of the array formed by the second sub-light-emitting group 1102 and the third light-emitting group 130
  • the number of columns of the array formed by the first sub-light-emitting group 1101 and the second light-emitting group 120 is equal to the number of columns of the array formed by the second sub-light-emitting group 1102 and the third light-emitting group 130, so that the light-emitting components 10 can be arranged in a regular array arranged.
  • FIG. 15 is an optical path diagram of a light source corresponding to the laser in FIG. 12 .
  • the first laser beam emitted by the first sub-light emitting group 1101 and the second sub-light emitting group 1102 are first linearly polarized light
  • the third laser beam emitted by the third light emitting group 130 is the second linearly polarized light.
  • the polarization directions of the first linearly polarized light and the second linearly polarized light are perpendicular to each other.
  • the first linearly polarized light emitted by the first sub-light emitting group 1101 and the second sub-light emitting group 1102 is S-polarized light (S-Polarized Light), and the second linearly polarized light emitted by the second light emitting group 120 and the third light emitting group 130 For P polarized light (P-Polarized Light).
  • the first linearly polarized light emitted by the first sub-light emitting group 1101 and the second sub-light emitting group 1102 is P-polarized light
  • the second linearly polarized light emitted by the second light-emitting group 120 and the third light-emitting group 130 is S-polarized light.
  • P-polarized light refers to linearly polarized light whose polarization direction is parallel to the light-incident plane
  • S-polarized light refers to linearly-polarized light whose polarization direction is perpendicular to the light-incident plane.
  • the first linearly polarized light emitted by the first sub-light emitting group 1101 and the second sub-light emitting group 1102 is mainly P-polarized light
  • the second linearly polarized light emitted by the second light-emitting group 120 and the third light-emitting group 130 is S-polarized light: Example to illustrate.
  • the light source 1 further includes: a first polarization conversion component 31 and a second polarization conversion component 32 .
  • the first polarization conversion component 31 is located on the light emitting side of the first sub-light emitting group 1101 and the second light emitting group 120, and is configured to convert the first linearly polarized light into the second linearly polarized light, and convert the second linearly polarized light into the second linearly polarized light.
  • the polarized light is converted into the first linearly polarized light.
  • the second polarization conversion component 32 is located on the light emitting side of the third light emitting group 130 and is configured to convert the second linearly polarized light into the first linearly polarized light.
  • the P-polarized light emitted by the first sub-light emitting group 1101 is converted into S-polarized light after passing through the first polarization conversion component 31, and the S-polarized light emitted by the second light-emitting group 120 is converted into P-polarized light after passing through the first polarization conversion component 31.
  • polarized light is converted into P-polarized light after passing through the second polarization conversion component 32 .
  • the first polarization conversion component 31 and the second polarization conversion component 32 may be half-wave plates (ie, half-wave plates).
  • the half-wave plate can change the polarization direction of the laser beam by 90°.
  • the combination lens group 200 includes a first combination lens group 201 , a second combination lens group 202 and a third combination lens group 203 .
  • the first light-combining mirror group 201 includes a first reflector A1 and a polarizing light-combining mirror C, and the first light-combining mirror group 201 is configured to output the first laser beam from the first sub-light emitting group 1101 and the second sub-light-emitting group 1102 Be bundled.
  • the second light combining mirror group 202 includes a first reflector A1 and a first light combining mirror B1 , and the second light combining mirror group 202 is configured to combine the laser beams emitted from the second light-emitting group 120 and the third light-emitting group 130 .
  • the third light combining mirror group 203 includes a second reflector A2 and a second light combining mirror B2, and the third light combining mirror group 203 is configured to combine the laser beam combined by the first light combining mirror group 201 and the laser beam combined by the second light combining mirror group 201 The laser beams combined by the two light combining mirror groups 202 are combined.
  • the first reflector A1 is located on the light emitting side of the first sub-light emitting group 1101 and the second light emitting group 120 , and is configured to reflect the first laser beam and the second laser beam.
  • the second reflective mirror A2 is located at the light emitting side of the first light combining mirror B1 and is configured to reflect the second laser beam and the third laser beam.
  • the first light-combining mirror B1 is located at the intersection of the outgoing light of the third light-emitting group 130 and the outgoing light of the first reflective mirror A1 , and is configured to transmit the second laser beam and reflect the third laser beam.
  • the second light combining mirror B2 is located at the intersection of the outgoing light of the second reflecting mirror A2 and the outgoing light of the polarizing light combining mirror C, and is configured to transmit the second laser beam and the third laser beam, and reflect the the first laser beam.
  • the polarization combining mirror C is located at the intersection of the outgoing light of the second sub-light emitting group 1102 and the outgoing light of the first reflective mirror A1, and is configured to transmit the second linearly polarized light and reflect the first linearly polarized light.
  • the polarization combining mirror C can be a polarization beam splitter prism (Polarization Beam Splitter, PBS), or the polarization combining mirror C can also be a lens coated with a polarization beam splitting dielectric film.
  • PBS Polarization Beam Splitter
  • the first laser beam (P polarized light) emitted by the first sub-light emitting group 1101 is converted into S polarized light (first laser beam) by the first polarization conversion component 31 after entering the first polarization conversion component 31. light beam) and incident on the first mirror A1.
  • the first laser beam (S polarized light) incident on the first reflector A1 is reflected by the first reflector A1 to the polarizing light combining mirror C, then transmitted to the second light combining mirror B2 through the polarizing light combining mirror C, and passed through The second light combining mirror B2 is reflected to the light outlet of the light source 1 .
  • the first laser beam (P polarized light) emitted by the second sub-light emitting group 1102 is incident on the polarizing light combining mirror C, reflected by the polarizing light combining mirror C to the second light combining mirror B2, and passed through the second light combining mirror B2 reflected to the light outlet of light source 1.
  • the spot area of the first laser beam is larger.
  • the first laser beam emitted by the first sub-light emitting group 1101 and the first laser beam emitted by the second sub-light emitting group 1102 can be combined through the polarization combining mirror C, so that the spots of the two laser beams overlap at the same position, thereby The spot area of the first laser beam emitted by the first light emitting group 110 is reduced.
  • the second laser beam (S polarized light) emitted by the second light emitting group 120 enters the first polarization conversion component 31, it is converted into P polarized light (second laser beam) by the first polarization conversion component 31 and enters the first polarization conversion component 31.
  • Mirror A1 The second laser beam (P polarized light) incident on the first mirror A1 is reflected by the first mirror A1 to the first light combining mirror B1, then transmitted to the second mirror A2 through the first light combining mirror B1, and After being reflected by the second reflecting mirror A2 to the second light combining mirror B2, the light is transmitted to the light outlet of the light source 1 through the second light combining mirror B2.
  • the third laser beam (S polarized light) emitted by the third light emitting group 130 is converted into P polarized light (third laser beam) by the second polarization conversion component 32 after being incident on the second polarization conversion component 32 and then incident on the first polarization conversion component 32.
  • the third laser beam (P polarized light) incident to the first light combining mirror B1 is reflected to the second light combining mirror A2 by the first light combining mirror B1, then reflected to the second light combining mirror B2 by the second light combining mirror A2, And transmit to the light outlet of the light source 1 through the second light combining mirror B2.
  • the second laser beam emitted by the second light-emitting group 120 and the third laser beam emitted by the third light-emitting group 130 are incident on the first beam combining mirror B1, and combined by the first beam combining mirror B1, so that the second laser beam The light spots of the light beam and the third laser beam overlap to the same position, thereby reducing the area of the light spot formed by the second laser beam and the third laser beam.
  • the combined second laser beam and the third laser beam and the first laser beam combined by the polarizing light combining mirror C enter the second light combining mirror B2, and are combined by the second light combining mirror B2 , thereby reducing the area of the spot formed by the first laser beam, the second laser beam and the third laser beam, reducing the difference in the spot area of the laser beams of different colors, and improving the coincidence degree and the spot of the combined light color uniformity.
  • the transmittance of the optical lenses for P-polarized light is greater than Transmittance to S polarized light.
  • the S-polarized light emitted by the second light-emitting group 120 is converted into P-polarized light by the first polarization conversion component 31, and the S-polarized light emitted by the third light-emitting group 130 is converted into P-polarized light by the second polarization conversion component 32. , so that the polarization directions of the laser beams are consistent, which can avoid the problem of color blocks in the projection screen due to the different transmission and reflection efficiencies of optical lenses for different polarized lights.
  • the light source 1 includes two polarization conversion components, but the present disclosure is not limited thereto. In some embodiments, the light source 1 may also only include one polarization conversion component.
  • FIG. 16 is an optical path diagram of another light source corresponding to the laser in FIG. 12.
  • the light source 1 includes a third polarization conversion component 33, and the third polarization conversion component 33 is located on the light-emitting side of the first sub-light emitting group 1101. and configured to convert the first linearly polarized light into the second linearly polarized light.
  • the light combining lens group 200 included in the light source 1 and the optical paths of the laser beams emitted by each light emitting group 140 are the same as the above, and will not be repeated here.
  • the number of optical elements in the laser projection device 1000 can be reduced, and the volume of the laser projection device 1000 can be reduced, and by reducing the number of optical elements through which the laser beam passes, the laser beam can also be avoided.
  • the loss caused by the transmission in the optical element improves the optical efficiency of the laser projection device 1000 .
  • the two laser beams of the same color emitted by the first sub-light emitting group 1101 and the second sub-light-emitting group 1102 can be combined so that the first The spot positions of the sub-light emitting group 1101 and the second sub-light emitting group 1102 are substantially the same.
  • the laser beams emitted by the second light emitting group 120 and the third light emitting group 130 can be combined, so that the spot positions of the second light emitting group 120 and the third light emitting group 130 are approximately the same .
  • the laser beam combined by the first combination lens group 201 can be combined with the laser beam combined by the second combination lens group 202, so that the first Spot positions of the first laser beam emitted by the sub-light emitting group 1101, the first laser beam emitted by the second sub-light emitting group 1102, the second laser beam emitted by the second light emitting group 120, and the third laser beam emitted by the third light emitting group 130 roughly the same, thereby reducing the size of the spot after combining multiple laser beams.
  • the first light emitting components 11 in the first sub-light emitting group 1101 and the second sub-light emitting group 1102 may be red laser chips or blue laser chips.
  • the first light emitting component 11 when the first light emitting component 11 is a red laser chip, one of the second light emitting component 12 and the third light emitting component 13 is a blue laser chip, and the other is a green laser chip.
  • the first light emitting component 11 when the first light emitting component 11 is a blue laser chip, one of the second light emitting component 12 and the third light emitting component 13 is a red laser chip, and the other is a green laser chip.

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Abstract

一种激光投影设备（1000），包括光源（1）和复眼透镜（41，42），光源（1）包括激光器（100）和合光镜组（200），激光器（100）包括多个发光部件（10），多个发光部件（10）包括多个第一发光部件（11）、多个第二发光部件（12）以及多个第三发光部件（13），多个第一发光部件（11）、多个第二发光部件（12）和多个第三发光部件（13）分别阵列排布，以形成多个发光群（110，120，130），合光镜组（200）位于激光器（100）的出光光路上，合光镜组（200）被配置为将多个发光群（110，120，130）中至少两个发光群出射的激光光束合束到相同位置后朝预定方向出射，合光镜组（200）合束后的光斑尺寸与复眼透镜（41，42）的光学扩展量相匹配。

Description

激光投影设备
本申请要求于2021年07月30日提交的、申请号为202110875070.1的中国专利申请的优先权；2021年07月30日提交的、申请号为202121778764.5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
目前，激光投影领域的发展迅速，激光器作为激光投影设备的核心部件，在激光投影设备中起到了重要的作用。多芯片激光二极管(Multi-Chip Laser Diode，MCL)激光器占用空间小，有利于光源的小型化。并且，MCL激光器还具有寿命长、亮度高、高功率等优点。通过将出射不同颜色激光光束的激光芯片封装在同一个MCL激光器内，可以实现多种单色激光器的功能。
发明内容
本公开一些实施例提供了一种激光投影设备。所述激光投影设备包括光源和复眼透镜。所述光源包括激光器和合光镜组。所述激光器包括多个发光部件，所述多个发光部件阵列排布。所述多个发光部件包括多个第一发光部件、多个第二发光部件以及多个第三发光部件。所述多个第一发光部件出射第一激光光束，所述多个第二发光部件出射第二激光光束，所述多个第三发光部件出射第三激光光束。所述多个第一发光部件、所述多个第二发光部件和所述多个第三发光部件分别阵列排布，以形成多个发光群。所述合光镜组位于所述激光器的出光光路上。所述合光镜组被配置为将所述多个发光群中至少两个发光群出射的激光光束合束到相同位置后朝预定方向出射。所述复眼透镜位于所述光源的出光侧，且被配置为匀化经所述光源出射的激光光束。所述合光镜组合束后的光斑尺寸与所述复眼透镜的光学扩展量相匹配。
附图说明
为了更清楚地说明本公开中的技术方案，下面将对本公开一些实施例中所需要使用的附图作简单地介绍，然而，下面描述中的附图仅仅是本公开的一些实施例的附图，对于本领域普通技术人员来讲，还可以根据这些附图获得其他的附图。此外，以下描述中的附图可以视作示意图，并非对本公开实施例所涉及的产品的实际尺寸、方法的实际流程、信号的实际时序等的限制。
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的时序图；
图4为根据一些实施例的激光投影设备中光源、光机和镜头的一种光路图；
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为图5中的数字微镜器件中一个微小反射镜片摆动的位置图；
图7为根据一些实施例的微小反射镜片的工作示意图；
图8为根据一些实施例的激光投影设备中光源、光机和镜头的另一种光路图；
图9为根据一些实施例的一种激光器的结构图；
图10为根据一些实施例的一种光源的光路图；
图11为根据一些实施例的另一种激光器的结构图；
图12为根据一些实施例的又一种激光器的结构图；
图13为图11中激光器对应的一种光源的光路图；
图14为图11中激光器对应的另一种光源的光路图；
图15为图12中激光器对应的一种光源的光路图；
图16为图12中激光器对应的另一种光源的光路图。
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。这里所公开的实施例并不必然限制于本文内容。
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。例如，“平行”包括绝对平行和近似平行，其中近似平行的可接受偏差范围例如可以是5°以内偏差；“垂直”包括绝对垂直和近似垂直，其中近似垂直的可接受偏差范围例如也可以是5°以内偏差。“相等”包括绝对相等和近似相等，其中近似相等的可接受偏差范围内例如可以是相等的两者之间的差值小于或等于其中任一者的5％。
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了一种激光投影设备。如图1所示，该激光投影设备1000包括壳体40(图1中仅示出部分壳体40)，装配于壳体40中的光源1，光机20，以及镜头30。该光源1被配置为提供照明光束(激光束)。该光机20被配置为利用图像信号对光源1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1、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1、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。比如，光源1通过其对应的壳体实现气密性密封，可以改善光源1的光衰问题。
光机20的一端和镜头30连接，且光机20和镜头30沿着激光投影设备1000的投影光束的出射方向(参照图2中所示的N方向)设置。在光机20的另一端连接有光源1。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。在本示例中，如图2所示，光源1和光机20沿M方向依次排列，且光机20以及镜头30沿N方向依次排列，M方向与N方向互相垂直。即，激光投影设备1000的投影光束的出射方向与激光投影设备1000的照明光束的出射方向(参照图2中所示的M方向)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，利于激光投影设备1000的结构排布。例如，当将光源1、光机20和镜头30设置在一个维度方向(例如，与方向N垂直的M方向)上时，该维度方向上光路的长度就会很长，从而不利于激光投影设备1000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1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)，然后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1同时输出三基色光，持续发出白光。光源1包括激光器，激光器可发出至少一种颜色的激光，比如蓝色激光。
图3为根据一些实施例的激光投影设备中光源的时序图。
例如，如图3所示，在一帧目标图像的投影过程中，光源1时序性地输出蓝色、红色和绿色激光光束。光源1在第一时间段T1内输出蓝色光束，在第二时间段T2内输出红色光束，在第三时间段T3内输出绿色光束。光源1完成一次各基色光束的时序性输出的时间为光源1输出基色光束的周期。一帧目标图像的显示周期内，光源1进行一次各基色光束的时序性输出，因此，一帧目标图像的显示周期与光源1输出基色光束的周期相等，均等于第一时间段T1、第二时间段T2和第三时间段T3的和。由于人眼的视觉暂留现象，人眼分辨不出某一时刻光的颜色，感知到的仍然是混合的白光。
图4为根据一些实施例的激光投影设备中光源、光机和镜头的一种光路图。
光源1发出的照明光束进入光机20。参考图4，光机20包括：扩散片2，第一透镜组件3，匀光部件4，第二透镜组件5、数字微镜器件6以及棱镜组件7。
扩散片2位于光源1的出光侧，且被配置为扩散来自光源1的照明光束。第一透镜组件3位于扩散片2的出光侧，且被配置为会聚经扩散片2扩散的照明光束。匀光部件4位于第一透镜组件3的出光侧，且被配置为匀化经第一透镜组件3会聚的照明光束。第二透镜组件5位于匀光部件4的出光侧，且第二透镜组件5被配置为将照明光束传输至棱镜组件7。棱镜组件7将照明光束反射至数字微镜器件6。数字微镜器件6对照明光束进行调制以得到投影光束，并将调制后得到的投影光束反射至镜头30中。
在一些实施例中，如图4所示，匀光部件4包括相对设置的第一复眼透镜41和第二复眼透镜42。第一复眼透镜41的入光面和第二复眼透镜42的出光面包括呈阵列排布的微小透镜单元。
光源1出射的照明光束经第一复眼透镜41聚焦到第二复眼透镜42的各微小透镜单元的中心，并依次通过第二透镜组件5和棱镜组件7后成像于数字微镜器件6上，从而提高照明光束的均匀性和照明亮度。
光机20中，数字微镜器件6是利用图像信号对光源1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颜色和亮度，以最终形成光学图像，因此数字微镜器件6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(或光阀)分为透射式光调制器件(或光阀)或反射式光调制器件(或光阀)。例如，图4所示的数字微镜器件6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(或光阀)的数量，可以将光机20分为单片系统、双片系统或三片系统。例如，图4所示的光机20中仅使用了一片数字微镜器件6，因此光机20可被称为单片系统。当使用三片数字微镜器件6时，则光机20可以被称为三片系统。
当光机20为三片系统时，光源1同时输出三基色光，以持续发出白光。
需要说明的是，根据投影架构的不同，光调制器件(或光阀)可以包括很多种，比如硅基液晶(Liquid Crystal on Silicon，LCOS)，液晶显示器(Liquid Crystal Display，LCD)或者数字微镜器件(Digital Micromirror Device，DMD)。由于在本公开的一些实施例中，图4所示的光机20应用数字光处理(Digital Light Processing，DLP)投影架构，因此，本公开一些实施例中的光调制器件(或光阀)为数字微镜器件(DMD)。
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为图5中的数字微镜器件中一个微小反射镜片摆动的位置图。图7为根据一些实施例的微小反射镜片的工作示意图。
如图5所示，数字微镜器件6包含成千上万个可被单独驱动以旋转的微小反射镜片601，这些微小反射镜片601呈阵列排布，每个微小反射镜片601对应待显示图像中的一个像素。如图6所示，在DLP投影架构中，每个微小反射镜片601相当于一个数字开关，在外力作用下可以在±12°或者±17°的范围内摆动。
如图7所示，微小反射镜片601在负的偏转角度反射出的光，称之为OFF光，OFF光为无效光，通常打到激光投影设备1000的壳体40上、光机20的壳体上或者光吸收单元400上吸收掉。微小反射镜片601在正的偏转角度反射出的光，称之为ON光，ON光是数字微镜器件6表面的微小反射镜片601接收照明光束照射，并通过正的偏转角度射入镜头30的有效光束，用于投影成像。微小反射镜片601的开状态为光源1发出的照明光束经微小反射镜片601反射后可以进入镜头30时，微小反射镜片601所处且可以保持的状态，即微小反射镜片601处于正的偏转角度的状态。微小反射镜片601的关状态为光源1发出的照明光束经微小反射镜片601反射后未进入镜头30时，微小反射镜片601所处且可以保持的状态，即微小反射镜片601处于负的偏转角度的状态。
例如，对于偏转角度为±12°的微小反射镜片601，位于+12°的状态即为开状态，位于-12°的状态即为关状态，而对于-12°和+12°之间的偏转角度，实际中未使用，微小反射镜 片601的实际工作状态仅开状态和关状态。而对于偏转角度为±17°的微小反射镜片601，位于+17°的状态即为开状态，位于-17°的状态即为关状态。图像信号通过处理后被转换成0、1这样的数字代码，这些数字代码可以驱动所述微小反射镜片601摆动。
在一帧图像的显示周期内，部分或全部微小反射镜片601会在开状态和关状态之间切换一次，从而根据微小反射镜片601在开状态和关状态分别持续的时间来实现一帧图像中的各个像素的灰阶。例如，当像素具有0～255这256个灰阶时，与灰阶0对应的微小反射镜片601在一帧图像的整个显示周期内均处于关状态，与灰阶255对应的微小反射镜片601在一帧图像的整个显示周期内均处于开状态，而与灰阶127对应的微小反射镜片601在一帧图像的显示周期内一半时间处于开状态、另一半时间处于关状态。因此通过图像信号控制数字微镜器件6中每个微小反射镜片601在一帧图像的显示周期内所处的状态以及各状态的维持时间，可以控制该微小反射镜片601对应像素的亮度(灰阶)，从而对投射至数字微镜器件6的照明光束进行调制。
图8为根据一些实施例的激光投影设备中光源、光机和镜头的另一种光路图。如图8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1000出光侧(即，图8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8中镜头30沿着N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激光投影设备1000采用DLP投影架构，光机20中光调制器件为数字微镜器件6为例进行说明，然而，这并不能理解为对本公开的限制。
下面详细描述根据本公开一些实施例的光源1。
图9为根据一些实施例的一种激光器的结构图，图10为根据一些实施例的一种光源的光路图。
在一些实施例中，如图10所示，光源1包括：激光器100和合光镜组200。
在一些实施例中，如图9所示，激光器100可以为MCL激光器，MCL激光器将多颗灯珠封装在一块基板上，形成面光源输出。图9中所示的激光器100包括金属基板101，金属基板101上封装有多颗灯珠102，多颗灯珠102可以串联，也可以按照行或者列并联进行驱动。金属基板101的两侧伸出引脚103，通过将这些引脚103进行电信号连接，可以驱动灯珠102发光。
在一些实施例中，如图9和图10所示，激光器100包括多个发光部件10，每个发光部件10设置在对应的灯珠102内。多个发光部件10被配置为发出至少两种颜色的激光光束。出射相同颜色的激光光束的发光部件10阵列排布，以形成对应的发光群140。发光群140中的多个发光部件10排列成M行N列的矩阵；这里，M和N为大于或等于1的整数，且M和N中的至少一个大于1。
例如，如图10所示，在多个发光部件10按照2×7的矩阵排列的情况下，多个发光部件10中的第一部分(如图10中的110)排列成2×2的矩阵，多个发光部件10中的第二部分(如图10中的120)排列成2×2的矩阵，多个发光部件10中的第三部分(如图10中的130)排列成2×3的矩阵。
在一些实施例中，图10所示的多个发光部件10也可以排列成4×6、3×5、或者4× 5阵列。不同阵列的多个发光部件10对应的激光器100的整体发光功率不同。
以下主要以激光器100的多个发光部件10按照2×7的矩阵排列为例进行说明。
在一些实施例中，一个激光器100中可以封装多个出射不同颜色的激光光束的发光部件10。在此情况下，通过一个激光器100即可出射多种颜色的激光光束，从而出射三基色光。此外，由于发光部件10出射的激光光束方向性好，因此，多个发光部件10出射的激光光束可以互不重合。
在一些实施例中，如图10所示，合光镜组200位于激光器100的出光侧，且被配置为将多个发光群140中至少两个发光群140出射的激光光束合束到相同位置后朝同一方向出射。
在一些实施例中，合光镜组200包括反射镜和合光镜(如二向色镜)。所述反射镜被配置为反射激光光束，以进行光路的转折。所述合光镜被配置为将不同颜色的激光光束进行合光。这样，通过设置所述反射镜和所述合光镜，可以将发光群140出射的激光光束合束到相同的位置，使不同激光光束的光斑重合，从而缩小重合后的光斑的尺寸。
图11为根据一些实施例的另一种激光器的结构图。图12为根据一些实施例的又一种激光器的结构图。
在一些实施例中，如图10至图12所示，激光器100包括第一发光部件11、第二发光部件12和第三发光部件13。第一发光部件11出射第一激光光束，第二发光部件12出射第二激光光束，第三发光部件13出射第三激光光束。第一发光部件11、第二发光部件12和第三发光部件13出射的激光光束的波长不相同。
在一些实施例中，发光部件10为激光芯片。此时，第一发光部件11、第二发光部件12以及第三发光部件13为红光激光芯片、绿光激光芯片和蓝光激光芯片中的一种。
在一些实施例中，如图10至图12所示，多个第一发光部件11阵列排布，以形成第一发光群110，第一发光群110出射所述第一激光光束。多个第二发光部件12阵列排布，以形成第二发光群120，第二发光群120出射所述第二激光光束。多个第三发光部件13阵列排布，以形成第三发光群130，第三发光群130出射所述第三激光光束。
在一些实施例中，如图10所示，第一发光群110、第二发光群120以及第三发光群130沿激光器100的第一方向X并排设置。第一方向X为多个发光部件10形成的阵列的行所在的方向。
在此情况下，如图10所示，合光镜组200包括第一反射镜A1、第二反射镜A2、第一合光镜B1和第二合光镜B2。
第一反射镜A1位于第一发光群110、第二发光群120和第三发光群130的出光侧，且被配置为反射第一发光群110出射的第一激光光束、第二发光群120出射的第二激光光束和第三发光群130出射的第三激光光束。第二反射镜A2位于第一反射镜A1的出光侧，且被配置为反射所述第一激光光束。
第一合光镜B1位于第二反射镜A2出射光和第一反射镜A1的出射光的交汇处，且被配置为透射所述第一激光光束，且反射所述第二激光光束。第二合光镜B2位于第一合光镜B1的出射光和第一反射镜A1的出射光的交汇处，且被配置为透射所述第一激光光束以及所述第二激光光束，且反射所述第三激光光束。
第二反射镜A2、第一合光镜B1和第二合光镜B2相互平行设置。
如图10所示，第一发光群110、第二发光群120和第三发光群130出射的激光光束 入射至第一反射镜A1，并被第一反射镜A1反射。
第一发光群110出射的第一激光光束在经第一反射镜A1反射至第二反射镜A2后，经第二反射镜A2反射至第一合光镜B1，并在依次透射第一合光镜B1、第二合光镜B2后，出射至光源1的出光口。
第二发光群120出射的第二激光光束在经第一反射镜A1反射至第一合光镜B1后，经第一合光镜B1反射至第二合光镜B2，并经由第二合光镜B2透射至光源1的出光口。
第三发光群130出射的第三激光光束在经第一反射镜A1反射至第二合光镜B2后，经第二合光镜B2反射至光源1的出光口。
这样，通过上述合光镜组200，可以将第一发光群110出射的第一激光光束、第二发光群120出射的第二激光光束、以及第三发光群130的第三激光光束合束到相同位置，使三种激光光束的光斑位置大致相同，从而缩小三种激光光束共同形成的光斑的尺寸。并且，小尺寸的光斑便于与匀光部件4(参考图4)匹配(即，光斑尺寸与复眼透镜的光学扩展量(Etendue)相匹配)，从而提高了匀光部件4的匀光效果，以及激光投影设备1000的显示效果。
在一些实施例中，第一发光群110包括第一子发光群1101和第二子发光群1102。如图11所示，第一子发光群1101和第二子发光群1102并排排布，或者，如图12所示，第一子发光群1101和第二子发光群1102并列排布。
在一些实施例中，如图11所示，第一子发光群1101和第二子发光群1102沿第一方向X排成一行。第二发光群120以及第三发光群130沿第一方向X排成另一行。第一子发光群1101与第二发光群120沿第二方向Y排成一列，第二子发光群1102与第三发光群130沿第二方向Y排成另一列。第二方向Y为多个发光部件10形成的所述阵列的列所在的方向，且第二方向Y与第一方向X相互垂直。
在一些实施例中，如图11所示，第一发光群110构成的阵列的行数等于第二发光群120以及第三发光群130构成的阵列的行数，且第一发光群110构成的阵列的列数等于第二发光群120以及第三发光群130构成的阵列的列数，从而使发光部件10可以以规则的阵列进行排布。
图13为图11中激光器对应的一种光源的光路图。
在一些实施例中，如图13所示，合光镜组200包括第一合光镜组201和第二合光镜组202。第一合光镜组201包括第一反射镜A1和第一合光镜B1，第一合光镜组201被配置为将第一发光群110和第三发光群130出射的激光光束合束。第二合光镜组202包括第二反射镜A2、第三反射镜A3以及第二合光镜B2，第二合光镜组202被配置为将经第一合光镜组201合束后的激光光束与第二发光群120出射的第二激光光束合束。
第一反射镜A1位于第一发光群110的出光侧，且被配置为反射所述第一激光光束。第二反射镜A2位于第二发光群120的出光侧，且被配置为反射所述第二激光光束。第三反射镜A3位于第二反射镜A2的出光侧，且被配置为反射所述第二激光光束。
第一合光镜B1位于第三发光群130的出射光和第一反射镜A1的出射光的交汇处，且被配置为反射所述第三激光光束，且透射所述第一激光光束。第二合光镜B2位于第一合光镜B1的出射光和第三反射镜A3的出射光的交汇处，且被配置为透射所述第二激光光束，反射所述第一激光光束和所述第三激光光束。
如图13所示，第一发光群110出射的第一激光光束在入射至第一反射镜A1后，被 第一反射镜A1反射至第一合光镜B1，并在经由第一合光镜B1透射至第二合光镜B2后，被第二合光镜B2反射至光源1的出光口。
第二发光群120出射的第二激光光束在入射至第二反射镜A2后，被第二反射镜A2反射至第三反射镜A3，并在经第三反射镜A3反射至第二合光镜B2后，经由第二合光镜B2透射至光源1的出光口。
第三发光群130出射的第三激光光束在入射至第一合光镜B1后，经第一合光镜B1反射至第二合光镜B2，并经第二合光镜B2反射至光源1的出光口。
这里，通过第一合光镜B1将第一发光群110出射的第一激光光束和第三发光群130出射的第三激光光束进行合束，使两路激光光束的光斑重合到相同位置，从而缩小了第一激光光束和第三激光光束形成的光斑的面积。并且，在第一激光光束和第三激光光束合束后，通过第二合光镜B2可以将第二发光群120出射的第二激光光束与合束后的第一激光光束和第三激光光束进行合束，进一步缩小了第一激光光束、第二激光光束以及第三激光光束形成的光斑的面积。
图14为图11中激光器对应的另一种光源的光路图。
在一些实施例中，如图14所示，图13中合光镜组200中的第二反射镜A2和第一合光镜B1可以互换位置。也就是说，第二反射镜A2位于第三发光群130的出光侧，且被配置为反射所述第三激光光束。第一合光镜B1位于第一反射镜A1的出射光和第二发光群120的出射光的交汇处，并被配置为透射所述第一激光光束且反射所述第二激光光束。
在此情况下，第三反射镜A3被配置为反射所述第一激光光束以及所述第二激光光束，第二合光镜B2被配置为透射所述第一激光光束以及所述第二激光光束，且反射所述第三激光光束。
此时，第一合光镜组201被配置为将第一发光群110和第二发光群120出射的激光光束合束。第二合光镜组202被配置为将经第一合光镜组201合束后的激光光束与第三发光群130出射的第三激光光束合束。
如图14所示，第一发光群110出射的第一激光光束在入射至第一反射镜A1后，被第一反射镜A1反射至第一合光镜B1，并在透射第一合光镜B1后入射至第三反射镜A3。入射至第三反射镜A3的第一激光光束在经第三反射镜A3反射至第二合光镜B2后，经由第二合光镜B2透射至光源1的出光口。
第二发光群120出射的第二激光光束在入射至第一合光镜B1后，经第一合光镜B1反射至第三反射镜A3，并在经第三反射镜A3反射至第二合光镜B2后，经由第二合光镜B2透射至光源1的出光口。
第三发光群130出射的第三激光光束在入射至第二反射镜A2后，被第二反射镜A2反射至第二合光镜B2，并经第二合光镜B2反射至光源1的出光口。
这里，通过第一合光镜B1将第一发光群110出射的第一激光光束和第二发光群120出射的第二激光光束进行合束，使两路激光光束的光斑重合到相同位置，从而缩小了第一激光光束和第二激光光束形成的光斑的面积。并且，在第一激光光束和第二激光光束合束后，通过第二合光镜B2可以将第三发光群130出射的第三激光光束与合束后的第一激光光束和第二激光光束进行合束，进一步缩小了第一激光光束、第二激光光束以及第三激光光束形成的光斑的面积。
在本公开的一些实施例中，通过对两种颜色的激光光束进行合束，并将合束后的激 光光束与另一种颜色的激光光束进行合束，可以分别对不同颜色的激光光束进行合束，相对于一次合束三种或更多种不同颜色光束而言，使得不同颜色的激光光束的光斑的位置大致相同，从而缩小了三种激光光束共同形成的光斑的尺寸，提高了合束的精准度。
当然，本公开并不限于此，在一些实施例中，如图12所示，第二发光群120和第一子发光群1101沿第一方向X排成一行。第三发光群130和第二子发光群1102沿第一方向X排成另一行。第一子发光群1101和第二子发光群1102沿第二方向Y排成一列。第二发光群120和第三发光群130沿第二方向Y排成另一列。
在一些实施例中，如图12所示，第一子发光群1101和第二发光群120构成的阵列的行数等于第二子发光群1102以及第三发光群130构成的阵列的行数，且第一子发光群1101和第二发光群120构成的阵列的列数等于第二子发光群1102以及第三发光群130构成的阵列的列数，从而使发光部件10可以以规则的阵列进行排布。
图15为图12中激光器对应的一种光源的光路图。
在一些实施例中，如图15所示，第一子发光群1101和第二子发光群1102出射的第一激光光束为第一线偏振光，第二发光群120出射的第二激光光束和第三发光群130出射的第三激光光束为第二线偏振光。第一线偏振光和第二线偏振光的偏振方向相互垂直。
例如，第一子发光群1101和第二子发光群1102出射的第一线偏振光为S偏振光(S-Polarized Light)，第二发光群120和第三发光群130出射的第二线偏振光为P偏振光(P-Polarized Light)。或者，第一子发光群1101和第二子发光群1102出射的第一线偏振光为P偏振光，第二发光群120和第三发光群130出射的第二线偏振光为S偏振光。P偏振光指偏振方向平行于入光面的线偏振光，S偏振光指偏振方向垂直于入光面的线偏振光。
以下主要以第一子发光群1101和第二子发光群1102出射的第一线偏振光为P偏振光，第二发光群120和第三发光群130出射的第二线偏振光为S偏振光为例进行说明。
在一些实施例中，如图15所示，光源1还包括：第一偏振转换部件31和第二偏振转换部件32。第一偏振转换部件31位于第一子发光群1101和第二发光群120的出光侧，且被配置为将所述第一线偏振光转化为所述第二线偏振光，以及将所述第二线偏振光转化为所述第一线偏振光。第二偏振转换部件32位于第三发光群130的出光侧，且被配置为将所述第二线偏振光转化为所述第一线偏振光。
例如，第一子发光群1101出射的P偏振光在经过第一偏振转换部件31之后转化为S偏振光，第二发光群120出射的S偏振光在经过第一偏振转换部件31之后转化为P偏振光。第三发光群130出射的S偏振光在经过第二偏振转换部件32之后转化为P偏振光。
在一些实施例中，第一偏振转换部件31和第二偏振转换部件32可以为二分之一波片(即半波片)。所述半波片能够使激光光束的偏振方向变化90°。
在一些实施例中，如图15所示，合光镜组200包括第一合光镜组201、第二合光镜组202以及第三合光镜组203。
第一合光镜组201包括第一反射镜A1和偏振合光镜C，第一合光镜组201被配置为将第一子发光群1101和第二子发光群1102出射的第一激光光束合束。第二合光镜组202包括第一反射镜A1和第一合光镜B1，第二合光镜组202被配置为将第二发光群120与第三发光群130出射的激光光束合束。第三合光镜组203包括第二反射镜A2和第二合光镜B2，且第三合光镜组203被配置为将经第一合光镜组201合束后的激光光束与经第二 合光镜组202合束后的激光光束合束。
第一反射镜A1位于第一子发光群1101和第二发光群120的出光侧，且被配置为反射所述第一激光光束以及所述第二激光光束。第二反射镜A2位于第一合光镜B1的出光侧，且被配置为反射所述第二激光光束以及所述第三激光光束。
第一合光镜B1位于第三发光群130的出射光和第一反射镜A1的出射光的交汇处，并被配置为透射所述第二激光光束且反射所述第三激光光束。第二合光镜B2位于第二反射镜A2的出射光和偏振合光镜C的出射光的交汇处，且被配置为透射所述第二激光光束和所述第三激光光束，且反射所述第一激光光束。
偏振合光镜C位于第二子发光群1102的出射光和第一反射镜A1的出射光的交汇处，且被配置为透射所述第二线偏振光，反射所述第一线偏振光。
在一些实施例中，偏振合光镜C可以为偏振分光棱镜(Polarization Beam Splitter，PBS)，或者，偏振合光镜C也可以为镀有偏振分光介质膜的镜片。
如图15所示，第一子发光群1101出射的第一激光光束(P偏振光)在入射至第一偏振转换部件31后，经第一偏振转换部件31转化为S偏振光(第一激光光束)并入射至第一反射镜A1。入射至第一反射镜A1的第一激光光束(S偏振光)在经第一反射镜A1反射至偏振合光镜C后，经由偏振合光镜C透射至第二合光镜B2，并经第二合光镜B2反射至光源1的出光口。
第二子发光群1102出射的第一激光光束(P偏振光)在入射至偏振合光镜C后，经偏振合光镜C反射至第二合光镜B2，并经第二合光镜B2反射至光源1的出光口。
这里，由于第一发光群110出射的第一激光光束分成了两路激光光束(即，第一子发光群1101出射的第一激光光束和第二子发光群1102出射的第一激光光束)，因此，第一激光光束的光斑面积较大。通过偏振合光镜C可以将第一子发光群1101出射的第一激光光束和第二子发光群1102出射的第一激光光束进行合束，使两路激光光束的光斑重合到相同位置，从而缩小了第一发光群110出射的第一激光光束的光斑面积。
第二发光群120出射的第二激光光束(S偏振光)在入射至第一偏振转换部件31后，经第一偏振转换部件31转化为P偏振光(第二激光光束)并入射至第一反射镜A1。入射至第一反射镜A1的第二激光光束(P偏振光)在经第一反射镜A1反射至第一合光镜B1后，经由第一合光镜B1透射至第二反射镜A2，并在经第二反射镜A2反射至第二合光镜B2后，经由第二合光镜B2透射至光源1的出光口。
第三发光群130出射的第三激光光束(S偏振光)在入射至第二偏振转换部件32后，经第二偏振转换部件32转化为P偏振光(第三激光光束)并入射至第一合光镜B1。入射至第一合光镜B1的第三激光光束(P偏振光)在经第一合光镜B1反射至第二反射镜A2后，经第二反射镜A2反射至第二合光镜B2，并经由第二合光镜B2透射至光源1的出光口。
这里，第二发光群120出射的第二激光光束与第三发光群130出射的第三激光光束入射至第一合光镜B1，并经第一合光镜B1进行合束，使第二激光光束和第三激光光束的光斑重合到相同位置，从而缩小了第二激光光束和第三激光光束形成的光斑的面积。然后，合束后的第二激光光束和第三激光光束与经偏振合光镜C合束后的第一激光光束入射至第二合光镜B2，并经第二合光镜B2进行合束，从而缩小了第一激光光束与第二激光光束以及第三激光光束形成的光斑的面积，减小了不同颜色激光光束的光斑面积的差 异性，提高了合光后的光斑的重合度以及光斑的颜色均匀性。
此外，由于激光投影设备1000中的光学镜片(例如，反射镜、合光镜)对于不同偏振方向的光的透过率和反射率存在差异，例如，光学镜片对P偏振光的透过率大于对S偏振光的透过率。
因此，通过第一偏振转换部件31将第二发光群120出射的S偏振光转换为P偏振光，以及通过第二偏振转换部件32将第三发光群130出射的S偏振光转换为P偏振光，使得激光光束的偏振方向相一致，可以避免由于光学镜片对于不同偏振光的透反效率不同，导致投影画面存在色块的问题。
前文主要描述了光源1包括两个偏振转换部件的实施例，但本公开并不限于此。在一些实施例中，光源1也可以仅包括一个偏振转换部件。
图16为图12中激光器对应的另一种光源的光路图，如图16所示，光源1包括第三偏振转换部件33，第三偏振转换部件33位于第一子发光群1101的出光侧，且被配置为将所述第一线偏振光转化为所述第二线偏振光。此时，光源1包括的合光镜组200，以及各发光群140出射的激光光束的光路与前文相同，此处不再赘述。
这里，通过仅设置一个偏振转换部件，可以减少激光投影设备1000中的光学元件的数量，缩小激光投影设备1000的体积，并且，通过减少激光光束经过的光学元件，还可避免所述激光光束在该光学元件中传输带来的损耗，提高了激光投影设备1000的光学效率。
在本公开的一些实施例中，通过利用第一合光镜组201，可以对第一子发光群1101和第二子发光群1102出射的颜色相同的两个激光光束进行合束，使得第一子发光群1101和第二子发光群1102的光斑位置大致相同。
并且，通过利用第二合光镜组202，可以对第二发光群120和第三发光群130出射的激光光束进行合束，使第二发光群120和第三发光群130的光斑位置大致相同。
最后，通过第三合光镜组203，可以将经第一合光镜组201合束后的激光光束与经第二合光镜组202合束后的激光光束进行合束，从而使第一子发光群1101出射的第一激光光束、第二子发光群1102出射的第一激光光束、第二发光群120出射的第二激光光束和第三发光群130出射的第三激光光束的光斑位置大致相同，从而缩小多种激光光束合束后的光斑的尺寸。
在一些实施例中，第一子发光群1101和第二子发光群1102中的第一发光部件11可以为红光激光芯片或蓝光激光芯片。
例如，当第一发光部件11为红光激光芯片时，第二发光部件12和第三发光部件13中的一个为蓝光激光芯片，且另一个为绿光激光芯片。或者，当第一发光部件11为蓝光激光芯片时，第二发光部件12和第三发光部件13中的一个为红光激光芯片，且另一个为绿光激光芯片。
以上所述，仅为本公开的具体实施方式，但本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本公开揭露的技术范围内，想到变化或替换，都应涵盖在本公开的保护范围之内。因此，本公开的保护范围应以所述权利要求的保护范围为准。

Claims (20)

  1. 一种激光投影设备，包括光源和复眼透镜，
    所述光源包括：
    激光器，所述激光器包括多个发光部件，所述多个发光部件阵列排布且包括：
    多个第一发光部件，所述多个第一发光部件出射第一激光光束；
    多个第二发光部件，所述多个第二发光部件出射第二激光光束；以及
    多个第三发光部件，所述多个第三发光部件出射第三激光光束；所述多个第一发光部件、所述多个第二发光部件和所述多个第三发光部件分别阵列排布，以形成多个发光群；以及
    合光镜组，位于所述激光器的出光光路上，所述合光镜组被配置为将所述多个发光群中至少两个发光群出射的激光光束合束到相同位置后朝预定方向出射；
    所述复眼透镜位于所述光源的出光侧，且被配置为匀化经所述光源出射的激光光束；其中
    所述合光镜组合束后的光斑尺寸与所述复眼透镜的光学扩展量相匹配。
  2. 根据权利要求1所述的激光投影设备，其中，所述第一激光光束、所述第二激光光束以及所述第三激光光束的波长不同，所述多个发光群包括第一发光群、第二发光群以及第三发光群；
    所述多个第一发光部件阵列排布以形成所述第一发光群，所述第一发光群出射所述第一激光光束；
    所述多个第二发光部件阵列排布以形成所述第二发光群，所述第二发光群出射所述第二激光光束；
    所述多个第三发光部件阵列排布以形成所述第三发光群，所述第三发光群出射所述第三激光光束。
  3. 根据权利要求2所述的激光投影设备，其中，所述合光镜组包括：
    第一合光镜组，所述第一合光镜组被配置为将所述第一发光群出射的所述第一激光光束、和所述第二发光群或所述第三发光群中的一者出射的激光光束合束；以及
    第二合光镜组，所述第二合光镜组被配置为将经所述第一合光镜组合束后的激光光束、与所述第二发光群或所述第三发光群中的另一者出射的激光光束合束。
  4. 根据权利要求3所述的激光投影设备，其中，所述第一发光群包括第一子发光群和第二子发光群；
    所述第一子发光群和所述第二子发光群沿第一方向排成一行，所述第二发光群以及所述第三发光群沿所述第一方向排成另一行，所述第一子发光群与所述第二发光群沿第二方向排成一列，所述第二子发光群与所述第三发光群沿所述第二方向排成另一列；所述第一方向与所述第二方向相互垂直。
  5. 根据权利要求4所述的激光投影设备，其中，
    所述第一发光群构成的阵列的行数等于所述第二发光群和所述第三发光群构成的阵列的行数，且所述第一发光群构成的阵列的列数等于所述第二发光群和所述第三发光群构成的阵列的列数。
  6. 根据权利要求4所述的激光投影设备，其中，
    所述第一合光镜组包括：
    第一反射镜，位于所述第一发光群的出光侧，所述第一反射镜被配置为反射所述第一激光光束；以及
    第一合光镜，位于所述第三发光群的出射光和所述第一反射镜的出射光的交汇处，所述第一合光镜被配置为反射所述第三激光光束，且透射所述第一激光光束；
    所述第二合光镜组包括：
    第二反射镜，位于所述第二发光群的出光侧，所述第二反射镜被配置为反射所述第二激光光束；
    第三反射镜，位于所述第二反射镜的出光侧，所述第三反射镜被配置为反射所述第二激光光束；以及
    第二合光镜，位于所述第一合光镜的出射光和所述第三反射镜的出射光的交汇处，所述第二合光镜被配置为透射所述第二激光光束，且反射所述第一激光光束和所述第三激光光束。
  7. 根据权利要求4所述的激光投影设备，其中，
    所述第一合光镜组包括：
    第一反射镜，位于所述第一发光群的出光侧，所述第一反射镜被配置为反射所述第一激光光束；以及
    第一合光镜，位于所述第二发光群的出射光和所述第一反射镜的出射光的交汇处，所述第一合光镜被配置为反射所述第二激光光束，且透射所述第一激光光束；
    所述第二合光镜组包括：
    第二反射镜，位于所述第三发光群的出光侧，所述第二反射镜被配置为反射所述第三激光光束；
    第三反射镜，位于所述第一合光镜的出光侧，所述第三反射镜被配置为反射所述第一激光光束以及所述第二激光光束；以及
    第二合光镜，位于所述第二反射镜的出射光和所述第三反射镜的出射光的交汇处，所述第二合光镜被配置为透射所述第一激光光束和所述第二激光光束，且反射所述第三激光光束。
  8. 根据权利要求6或7所述的激光投影设备，其中，
    所述第一发光部件为绿光发光部件、蓝光发光部件和红光发光部件中的一种，所述第二发光部件为所述绿光发光部件、所述蓝光发光部件和所述红光发光部件中的另一种，所述第三发光部件为所述绿光发光部件、所述蓝光发光部件和所述红光发光部件中的又一种。
  9. 根据权利要求2所述的激光投影设备，其中，所述第一发光群包括第一子发光群和第二子发光群，所述合光镜组包括：
    第一合光镜组，所述第一合光镜组被配置为将所述第一子发光群和所述第二子发光群出射的所述第一激光光束合束；
    第二合光镜组，所述第二合光镜组被配置为将所述第二发光群与所述第三发光群出射的激光光束合束；以及
    第三合光镜组，所述第三合光镜组被配置为将经所述第一合光镜组合束后的激光光束与经所述第二合光镜组合束后的激光光束合束。
  10. 根据权利要求9所述的激光投影设备，其中，
    所述第二发光群和所述第一子发光群沿第一方向排成一行，所述第三发光群和所述第二子发光群沿所述第一方向排成另一行，所述第一子发光群和所述第二子发光群沿第二方向排成一列，所述第二发光群和所述第三发光群沿所述第二方向排成另一列，所述第一方向与所述第二方向相互垂直。
  11. 根据权利要求10所述的激光投影设备，其中，
    所述第一子发光群和所述第二发光群构成的阵列的行数等于所述第二子发光群和所述第三发光群构成的阵列的行数，且所述第一子发光群和所述第二发光群构成的阵列的列数等于所述第二子发光群和所述第三发光群构成的阵列的列数。
  12. 根据权利要求10所述的激光投影设备，其中，
    所述第一子发光群和所述第二子发光群出射的所述第一激光光束为第一线偏振光，所述第二发光群出射的所述第二激光光束和所述第三发光群出射的所述第三激光光束为第二线偏振光，所述第一线偏振光和所述第二线偏振光的偏振方向相互垂直；
    所述光源包括偏振转换部件，所述偏振转换部件被配置为将所述第一线偏振光与所述第二线偏振光相互转换。
  13. 根据权利要求12所述的激光投影设备，其中，所述偏振转换部件包括：
    第一偏振转换部件，位于所述第一子发光群和所述第二发光群的出光侧，所述第一偏振转换部件被配置为将所述第一线偏振光转化为所述第二线偏振光，且将所述第二线偏振光转化为所述第一线偏振光；以及
    第二偏振转换部件，位于所述第三发光群的出光侧，且所述第二偏振转换部件被配置为将所述第二线偏振光转化为所述第一线偏振光。
  14. 根据权利要求12所述的激光投影设备，其中，所述偏振转换部件包括：
    第三偏振转换部件，位于所述第一子发光群的出光侧，且所述第三偏振转换部件被配置为将所述第一线偏振光转化为所述第二线偏振光。
  15. 根据权利要求12所述的激光投影设备，其中，
    所述第一合光镜组包括：
    第一反射镜，位于所述第一子发光群和所述第二发光群的出光侧，所述第一反射镜被配置为反射所述第一激光光束以及所述第二激光光束；以及
    偏振合光镜，位于所述第二子发光群的出射光与所述第一反射镜的出射光的交汇处，所述偏振合光镜被配置为透射所述第二线偏振光，且反射所述第一线偏振光；
    所述第二合光镜组包括：
    所述第一反射镜；以及
    第一合光镜，位于所述第三发光群的出射光和所述第一反射镜的出射光的交汇处，所述第一合光镜被配置为反射所述第三激光光束，且透射所述第二激光光束；
    所述第三合光镜组包括：
    第二反射镜，位于所述第一合光镜的出光侧，所述第二反射镜被配置为反射所述第二激光光束和所述第三激光光束；以及
    第二合光镜，位于所述第二反射镜的出射光和所述偏振合光镜的出射光的交汇处，所述第二合光镜被配置为透射所述第二激光光束和所述第三激光光束，且反射所述第一激光光束。
  16. 根据权利要求15所述的激光投影设备，其中，
    所述第一发光部件为红光发光部件，所述第二发光部件和所述第三发光部件中的一个为蓝光发光部件，另一个为绿光发光部件；或者
    所述第一发光部件为蓝光发光部件，所述第二发光部件和所述第三发光部件中的一个为红光发光部件，另一个为绿光发光部件。
  17. 根据权利要求12所述的激光投影设备，其中，
    所述偏振转换部件为半波片。
  18. 根据权利要求1至17中任一项所述的激光投影设备，其中，所述复眼透镜包括第一复眼透镜以及第二复眼透镜，所述第一复眼透镜以及所述第二复眼透镜相对设置。
  19. 根据权利要求1至18中任一项所述的激光投影设备，还包括：
    光机，所述光机被配置为根据图像信号对入射至所述光机的照明光束进行调制，以获得投影光束；以及
    镜头，所述镜头被配置为对入射至所述镜头的所述投影光束进行投射以形成投影画面。
  20. 根据权利要求19所述的激光投影设备，所述光机包括：
    扩散片，位于所述光源的出光侧，所述扩散片被配置为扩散来自所述光源的照明光束；
    第一透镜组件，位于所述扩散片的出光侧，所述第一透镜组件被配置为会聚经所述扩散片扩散的所述照明光束；
    所述复眼透镜，位于所述第一透镜组件的出光侧，所述复眼透镜被配置为匀化经所述第一透镜组件会聚的所述照明光束；
    第二透镜组件，位于所述复眼透镜的出光侧，所述第二透镜组件被配置为将所述照明光束传输至光阀调整部件；以及
    所述光阀调整部件，位于所述第二透镜组件的出光侧，所述光阀调整部件被配置为对所述照明光束进行调制以得到所述投影光束，并将所述投影光束反射至所述镜头中。
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Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110122372A1 (en) * 2009-11-26 2011-05-26 Seiko Epson Corporation Laser beam source device, projector, and monitoring device
US20120242959A1 (en) * 2011-03-25 2012-09-27 Abbe Optoelectronics Ltd. Color light mixing method, color light mixing device and small-sized projecting system having such color light mixing device
CN203217229U (zh) * 2013-03-01 2013-09-25 深圳市绎立锐光科技开发有限公司 一种发光装置及投影系统
US20140307231A1 (en) * 2013-04-16 2014-10-16 Hon Hai Precision Industry Co., Ltd. Laser projection device
CN107797296A (zh) * 2017-11-14 2018-03-13 海信集团有限公司 一种缩束装置、激光光源及激光投影设备
US20190129289A1 (en) * 2017-10-26 2019-05-02 Seiko Epson Corporation Light source apparatus and projector
CN110531573A (zh) * 2018-05-25 2019-12-03 松下知识产权经营株式会社 光源装置以及投射型影像显示装置
CN111562713A (zh) * 2020-03-31 2020-08-21 青岛海信激光显示股份有限公司 激光投影设备
CN113448159A (zh) * 2021-07-30 2021-09-28 青岛海信激光显示股份有限公司 一种激光光源装置和投影系统
CN113552763A (zh) * 2021-08-12 2021-10-26 四川启睿克科技有限公司 一种三色纯激光投影光学系统
CN215181380U (zh) * 2021-07-30 2021-12-14 青岛海信激光显示股份有限公司 一种激光光源装置和投影系统

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110122372A1 (en) * 2009-11-26 2011-05-26 Seiko Epson Corporation Laser beam source device, projector, and monitoring device
US20120242959A1 (en) * 2011-03-25 2012-09-27 Abbe Optoelectronics Ltd. Color light mixing method, color light mixing device and small-sized projecting system having such color light mixing device
CN203217229U (zh) * 2013-03-01 2013-09-25 深圳市绎立锐光科技开发有限公司 一种发光装置及投影系统
US20140307231A1 (en) * 2013-04-16 2014-10-16 Hon Hai Precision Industry Co., Ltd. Laser projection device
US20190129289A1 (en) * 2017-10-26 2019-05-02 Seiko Epson Corporation Light source apparatus and projector
CN107797296A (zh) * 2017-11-14 2018-03-13 海信集团有限公司 一种缩束装置、激光光源及激光投影设备
CN110531573A (zh) * 2018-05-25 2019-12-03 松下知识产权经营株式会社 光源装置以及投射型影像显示装置
CN111562713A (zh) * 2020-03-31 2020-08-21 青岛海信激光显示股份有限公司 激光投影设备
CN113448159A (zh) * 2021-07-30 2021-09-28 青岛海信激光显示股份有限公司 一种激光光源装置和投影系统
CN215181380U (zh) * 2021-07-30 2021-12-14 青岛海信激光显示股份有限公司 一种激光光源装置和投影系统
CN113552763A (zh) * 2021-08-12 2021-10-26 四川启睿克科技有限公司 一种三色纯激光投影光学系统

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