WO2021213105A1 - Moteur optique - Google Patents

Moteur optique Download PDF

Info

Publication number
WO2021213105A1
WO2021213105A1 PCT/CN2021/082122 CN2021082122W WO2021213105A1 WO 2021213105 A1 WO2021213105 A1 WO 2021213105A1 CN 2021082122 W CN2021082122 W CN 2021082122W WO 2021213105 A1 WO2021213105 A1 WO 2021213105A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
control
optical engine
deflection
galvanometer
Prior art date
Application number
PCT/CN2021/082122
Other languages
English (en)
Chinese (zh)
Inventor
张重扬
曹秀燕
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
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
Publication of WO2021213105A1 publication Critical patent/WO2021213105A1/fr
Priority to US17/731,596 priority Critical patent/US20220256129A1/en

Links

Images

Classifications

    • 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
    • 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

Definitions

  • This application relates to the field of projection technology, in particular to an optical engine.
  • optical engines are used in people's work and life, mainly used to emit light beams to achieve transmission imaging on projection screens.
  • the optical engine mainly includes a light source, an optomechanical system, and a lens.
  • the optomechanical system includes DMD (Digital Micromirror Device), cantilever support 1, galvanometer 2 and optomechanical housing 3. .
  • the light source is fixed on the light entrance side of the optical engine housing 3 and is used to emit light beams; the fixed end of the DMD and the cantilever bracket 1 are fixedly connected to the optical engine housing 3, and the galvanometer 2 is fixedly connected to the cantilever of the cantilever bracket 1. end.
  • the DMD is used to reflect the light beam emitted by the light source to the galvanometer 2.
  • the galvanometer 2 can switch between deflection and reset at a certain frequency to realize the deflection of the part of the light beam reflected by the DMD.
  • the lens is fixed on the optical machine housing 3 is on the light exit side, and is used to transmit and image the deflected light beam and the undeflected light beam of the galvanometer 2.
  • the galvanometer 2 will inevitably vibrate during the deflection process, and since the fixing method between the galvanometer 2 and the opto-mechanical housing 3 is equivalent to the cantilever fixation, the galvanometer 2 will be relatively large during the vibration process. The vibration amplitude of, and then it is easy to drive the cantilever support 1 to resonate. In this way, collisions between the galvanometer 2 and the cantilever support 1 and between the cantilever support 1 and the optical engine housing 3 will cause noise, which will affect the use of the optical engine.
  • optical engine including:
  • a light source the light source is used to emit a light beam
  • An optomechanical system the optomechanical system includes a digital micromirror device DMD, a support plate, a galvanometer and an optomechanical housing;
  • the DMD is arranged inside the optical engine housing, the support plate is fixedly connected to the optical engine housing through at least three first fixing members, the support plate is provided with a first light transmission hole, the The galvanometer is fixedly connected to the support plate through at least three second fixing members, and the coverage area of the orthographic projection of the galvanometer on the support plate has an overlap with the area where the first light-transmitting hole is located;
  • the at least three first fixing parts and the at least three second fixing parts can all form a polygon, and the DMD is used to reflect the light beam emitted by the light source to the galvanometer, and the galvanometer Can switch between deflection and resetting at the first frequency, so as to deflect the light beam reflected by the DMD during deflection;
  • the lens is fixed on the light exit side of the optical engine housing, and the lens is used for transmitting and imaging the deflected light beam and the undeflected light beam of the galvanometer.
  • Figure 1 is a schematic diagram of an exploded structure of an optical-mechanical system provided by related technologies
  • FIG. 2 is a schematic structural diagram of an optical engine provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of an exploded structure of an optical-mechanical system provided by an embodiment of the present application.
  • FIG. 4 is a schematic cross-sectional structure diagram of an optical-mechanical system provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a 2k projection projection provided by an embodiment of the present application.
  • Fig. 6 is a schematic diagram of another 2k projection provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of a 4k projection projection provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of a cross-sectional structure of a galvanometer provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of a top view structure of a galvanometer provided by an embodiment of the present application.
  • control component 32: light-transmitting component; 51: first damping rubber; 71: lens component; 72: reflector; 73: prism component;
  • 311 PCB; 321: deflection shrapnel; 322: translucent lens; 323: first fixing screw;
  • 3211 Shrapnel inner ring
  • 3212 Shrapnel outer ring
  • 3213 First connecting bridge
  • 3214 Second connecting bridge
  • 3215 Third connecting bridge
  • 3216 Fourth connecting bridge
  • 3217 First fixed arm
  • 3218 No. Two fixed arms.
  • FIG. 2 illustrates a schematic structural diagram of an optical engine according to an embodiment of the present application
  • FIG. 3 illustrates a schematic cross-sectional structure diagram of an optical engine system according to an embodiment of the present application.
  • the optical engine includes: a light source 00, an optomechanical system 01 and a lens 02.
  • the light source 00 is used to emit light beams;
  • the optomechanical system 01 includes DMD1, a support plate 2, a galvanometer 3, and an optomechanical housing 4.
  • DMD1 is arranged inside the optical engine housing 4, the support plate 2 is fixedly connected to the optical engine housing 4 through at least three first fixing parts 5, the support plate 2 is provided with a first light transmission hole, and the galvanometer 3 passes through at least three
  • the second fixing member is fixedly connected to the support plate 2, and the coverage area of the orthographic projection of the galvanometer 3 on the support plate 2 has an overlap with the area where the first light-transmitting hole is located; wherein, at least three first fixing members 5 And at least three second fixing members can all form a polygon, DMD1 is used to reflect the light beam emitted by the light source 00 to the galvanometer 3, and the galvanometer 3 can switch between deflection and reset at the first frequency to deflect during deflection The light beam reflected by the DMD1; the lens 02 is fixed on the light exit side of the optical machine housing 4, and the lens 02 is used to transmit and image the deflected light beam and the undeflected light beam of the galvanometer 3.
  • the support plate 2 can more stably fix the galvanometer 3 on the optical engine housing 4 Therefore, it is not easy to drive the support plate 2 to resonate during the deflection of the galvanometer 3, so that noise is not easily generated between the support plate 2 and the optical engine housing 4, and the effect of excessive noise on the performance of the optical engine is avoided.
  • the support plate 2 is provided with a first light transmission hole, and the coverage area of the orthographic projection of the galvanometer 3 on the support plate 2 overlaps with the area where the first light transmission hole is located, the light beam can pass through the galvanometer 3 and The first light-transmitting hole to achieve propagation.
  • the galvanometer 3 can deflect the light beams rotated and reflected by the DMD1 during deflection, and can emit the deflected light beams and the undeflected light beams to the lens 02, and the lens 02 can realize transmission imaging.
  • the optomechanical system 01 may also not include the support plate 2, so that the galvanometer 3 is directly and fixedly connected to the optomechanical housing 4.
  • the galvanometer 3 can be fixedly connected to the optical engine housing 4 by at least three third fixing members, and the at least three third fixing members are enclosed in a polygonal shape. Since the support plate 2 used to support the galvanometer 3 is eliminated, the collision between the galvanometer 3 and the support plate 2 and the generation of noise are avoided, thereby further reducing the loudness of the noise.
  • the number of internal components of the optomechanical housing 4 is also reduced, thereby reducing the occupancy rate of the internal space of the optomechanical housing 4, thereby facilitating the arrangement of other components in the optomechanical system 01.
  • a damping washer corresponding to each third fixing part can be arranged between the galvanometer 3 and the optical engine housing 4, and each damping washer can be sleeved on the corresponding third fixing part and clamped on the galvanometer 3 and the optical engine housing 4. In this way, the collision between the galvanometer 3 and the opto-mechanical housing 4 can be effectively prevented.
  • the first frequency refers to the reciprocal of the time period from the undeflected state to the deflected state of the galvanometer 3.
  • the time length can be set according to the reaction time length of the human eyes, as long as the screen projected by the lens 02 can reflect the effect of 4K resolution when the user watches it, which is not limited in the embodiment of the present application.
  • the light source 00 may be fixed on the light entrance side of the optical engine housing 4, and the housing wall where the light entrance side of the optical engine housing 4 is located and the housing wall where the light exit side is located may be adjacent or opposite.
  • the relative position of the galvanometer 3 and the support plate 2 can be set according to the size of the light exit side space of the optical engine housing 4. For example, when the space on the light exit side of the optical engine housing 4 is large, if the volume of the support plate 2 is If the volume of the galvanometer lens 3 is larger, the support plate 2 can be closer to the lens 02 relative to the galvanometer lens 3.
  • the relative position of the galvanometer 3 and the support plate 2 can also be set according to other conditions, which is not limited in the embodiment of the present application.
  • the support plate 2 may have a rectangular structure, and of course, it may also have a structure of other shapes such as a circle.
  • the support plate 2 has a rectangular structure and the number of the first fixing members 5 is three, the three first fixing members 5 can be respectively close to the three sides of the rectangular support plate 2, so that the three first fixing members 5 The distribution positions are more dispersed, so that the support plate 2 can be limited in a wide range.
  • the number of the first fixing members 5 is four, the four first fixing members 5 can be respectively close to the four sides of the rectangular support plate 2, of course, they can also be arranged in other forms, which are not limited in the embodiment of the present application.
  • the first fixing member 5 may be a fixing screw, of course, it may also be a first fixing member 5 of other types.
  • each second fixing member and the structure of the first fixing member 5 may be the same or similar, which will not be repeated in the embodiment of the present application.
  • the optical-mechanical system 01 may further include at least three first damping rubbers 51 corresponding to at least three first fixing members 5 one-to-one, and each first fixing member 5 passes through the corresponding first damping rubber 51.
  • the vibration rubber 51 and the support plate are fixedly connected with the optical engine housing. In this way, the first damping rubber 51 can prevent the corresponding first fixing member 5 from colliding with the supporting plate 2, thereby significantly reducing the volume of the noise.
  • the first fixing member 5 may be a shoulder screw.
  • the first damping rubber 51 may be sleeved on the shoulder of the shoulder screw, and the length of the first damping rubber 51 in the direction of the central axis of the shoulder screw It can be greater than the length of the shaft shoulder, and the first damping rubber 51 can avoid the direct contact between the support plate 2 and the shaft shoulder, thereby avoiding the collision between the first fixing member 5 and the support plate 2.
  • the first fixing member 5 may also be other types of screws, which are not described in the embodiment of the present application.
  • the optical engine may be an ultra-short-focus optical engine.
  • the optical engine may also be a short-focus optical engine or a long-focus optical engine.
  • the optical engine may also include a radiator 03.
  • the radiator 03 can be fixedly connected to the optomechanical system 01 to dissipate heat from the optomechanical system 01.
  • 03 can also be connected to light source 00 to dissipate heat from light source 00.
  • heat sink 03 can be connected to light source 00 and optomechanical system 01 at the same time to dissipate heat from light source 00 and optomechanical system 01 at the same time. This is not done in the embodiment of the application. limited.
  • the light source 00 may include a monochromatic light source 00 or a multi-color light source 00.
  • the monochromatic light source 00 may be a blue laser.
  • the light source 00 may also include a fluorescent wheel and a color filter wheel to ensure that the light beam emitted by the light source 00 can be a red, green, and blue light beam.
  • the light source 00 may not include a fluorescent wheel and/or color filter wheel, so in order to ensure the projection effect of the optical engine, the fluorescent wheel and/or color filter wheel can be set in the optical engine system 01, that is, the optical engine system 01 may also include a fluorescent wheel and/or color filter wheel.
  • the multi-color light source 00 may be a three-color laser system.
  • a three-color laser system may include a green laser, a red laser, and a blue laser, so that the three lasers can directly emit red, green, and blue light beams.
  • the optical-mechanical system 01 may also include a homogenizing component, so that the monochromatic light source 00 or the multi-color light source 00 included in the light source 00 can be treated by the homogenizing component.
  • the light beam emitted by the light source 00 is homogenized.
  • the homogenization component will be described in detail below.
  • the optical machine system 01 may further include an optical lens 7.
  • the optical lens 7 may include a lens assembly 71, a mirror 72, and a prism assembly 73.
  • the light incident side of the lens assembly 71 Towards the light entrance side of the optical engine housing 4, the light exit side of the lens assembly 71 faces the reflecting surface of the reflector 72, so that the lens assembly 71 can shape the light beam emitted by the light source 00 and emit the shaped light beam to The reflecting mirror 72; the reflecting surface of the reflecting mirror 72 also faces the first light entrance side of the prism assembly 73, so that the reflecting mirror 72 can reflect the beam shaped by the lens assembly 71 to the prism assembly 73; the first light exit side of the prism assembly 73 and The second light entrance side faces DMD1, and the second light exit side of the prism assembly 73 faces the galvanometer 3, so that the prism assembly 73 can refract the light beam reflected by the reflector 72 to the DMD1, and rotate and reflect the reflected
  • the lens component 71 may include a convex lens and/or a concave lens
  • the prism component 73 may be a TIR (Total Internal Reflection) prism or an RTIR (Refraction Total Internal Reflection) prism.
  • TIR Total Internal Reflection
  • RTIR Reflect Total Internal Reflection
  • the projected image formed by the light beam emitted by the DMD 1 can achieve a 4k resolution, thereby improving the projection effect of the optical engine.
  • the galvanometer 3 When the galvanometer 3 is not deflected, that is, after the galvanometer 3 is reset, the light beams after being rotated and reflected by the DMD1 can directly pass through the galvanometer 3, and the pixel arrangement of the realized picture can be as shown in Fig. 5. It is 2K resolution.
  • the galvanometer 3 When the galvanometer 3 is in the deflection state, after the light beams rotated and reflected by the DMD 1 are deflected by the galvanometer 3, the pixel points of the realized picture can be arranged as shown in FIG. 6, and the picture has a 2K resolution.
  • the galvanometer 3 since the polarization frequency of the galvanometer 3 is relatively high, it is difficult for the human eye to distinguish the change state of the projected picture after the galvanometer 3 is deflected and the picture projected after the reset. Therefore, the galvanometer 3 is reset and the galvanometer 3 is deflected.
  • the picture can show a superimposed effect. In this way, the arrangement of the pixels of the picture presented on the image can be as shown in FIG. 7, so as to realize the 4K resolution of the picture.
  • the galvanometer 3 may have a plate-like structure. As shown in FIG. 8, the galvanometer 3 includes a control component 31 and a light-transmitting component 32.
  • the control component 31 is fixedly connected to the support plate 2, and the light-transmitting component 32 is fixed at
  • the control component 31 is installed on the control component 31 with a gap; the light-transmitting component 32 can be switched between deflection and reset at the first frequency under the action of the control component 31.
  • the galvanometer 3 can be fixedly connected to the support plate 2 through the control assembly 31, and can be deflected and reset by the light-transmitting assembly 32, and the light-transmitting assembly 32 can deflect the light beam reflected by the DMD1 when deflecting.
  • the galvanometer 3 can be a plate-shaped structure, the galvanometer 3 is small in size, and thus it is not easy to produce obvious vibration and noise during deflection.
  • control component 31 and the light-transmitting component 32 are both plate-shaped structures.
  • the galvanometer 3 composed of the control component 31 and the light-transmitting component 32 arranged in the gap can also be a plate-shaped structure.
  • the gap between the light-transmitting component 32 and the control component 31 may be no less than 0.5 mm to ensure that the light-transmitting component 32 is not affected by the control component 31 when the light-transmitting component 32 is deflected.
  • the interval of the gap may be 0.6 mm or 0.8 mm.
  • the spacing of the gap between the light-transmitting component 32 and the control component 31 can also be other values, as long as it is ensured that the light-transmitting component 32 is not affected when deflected, and the galvanometer 3 can be maintained in a plate structure without causing the galvanometer
  • the overall size of 3 may be too large, which is not limited in the embodiment of the present application.
  • the light-transmitting component 32 may include a deflection elastic piece 321 and a light-transmitting mirror 322; the deflection elastic piece 321 is fixed on the control assembly 31, and the deflection elastic piece 321 is provided with a second light-transmitting hole,
  • the transparent mirror 322 is fixedly connected to the deflecting elastic piece 321, and the coverage area of the orthographic projection of the transparent mirror 322 on the deflecting elastic piece 321 has an overlap with the area where the second light transmission hole is located, and the control assembly 31 is used for controlling by the deflecting elastic piece 321
  • the transparent mirror 322 switches between deflection and resetting at the first frequency.
  • the deflection elastic piece 321 has elasticity, it is easy to produce elastic deformation under the control of the control assembly 31, thereby facilitating the deflection under the control of the control assembly 31, and at the same time driving the transparent mirror 322 to deflect.
  • the control assembly can be easily controlled.
  • the control of 31 generates a reset, and then drives the transparent mirror 322 to reset.
  • the light transmitting mirror 322 can be embedded in the deflecting spring 321 based on the second light transmitting hole. In this way, the hole wall of the second light transmitting hole and the outer edge of the light transmitting mirror 322 can be in close contact, so that the light transmitting mirror 322 can be realized.
  • the coverage area of the orthographic projection on the deflecting elastic piece 321 has an overlap with the area where the second light-transmitting hole is located.
  • the light-transmitting mirror 322 can also be bonded to the deflecting elastic piece 321 by glue, while the light-transmitting mirror 322 covers the second light-transmitting hole, and the coverage area of the orthographic projection of the light-transmitting mirror 322 on the deflection elastic piece 321 can also be achieved.
  • the area where the second light transmission hole is located has overlap.
  • the light-transmitting mirror 322 can also be fixedly connected to the deflection spring 321 in other ways, which is not limited in the embodiment of the present application.
  • the coverage area of the orthographic projection of the light transmitting mirror 322 on the deflecting spring 321 and the area where the second light transmission hole is located have an overlap, the light beam after the rotation and reflection of the DMD1 can smoothly pass through the light transmission component 32 based on the overlap.
  • the area of the second light-transmitting hole can be smaller than the area of the light-transmitting mirror 322.
  • the area of the second light-transmitting hole can also be larger than the area of the light-transmitting mirror 322, as long as it does not hinder the propagation of the light beam. There is no restriction on this.
  • the transparent mirror 322 may be round or square. Accordingly, the shape of the second transparent hole may be the same as the shape of the transparent mirror 322.
  • the light-transmitting mirror 322 and the second light-transmitting hole can also be arranged in other shapes, which are not limited in the embodiment of the present application.
  • the control assembly 31 can control the deflection and resetting of the deflection elastic piece 321 based on the principle of magnetic attraction or repulsion.
  • the material of the deflection elastic piece 321 may be a metal material that is easily magnetized.
  • the material of the deflection elastic piece 321 is all It can be iron, cobalt, nickel, etc.
  • the control assembly 31 can attract or repel the deflecting elastic piece 321 to realize the deflection and resetting of the deflecting elastic piece 321.
  • the control assembly 31 can also control the deflection and resetting of the deflection spring 321 based on other principles, and the deflection spring 321 can also be made of other materials, which is not limited in the embodiment of the present application.
  • the deflection spring 321 may include a spring inner ring 3211 and a spring outer ring 3212; the inner edge of the spring inner ring 3211 forms a second light transmission hole, and the light transmission mirror 322 and the spring inner ring 3211
  • the inner edge of the shrapnel is fixedly connected, the outer edge of the inner ring of shrapnel 3211 has a first connecting bridge 3213 and a second connecting bridge 3214 arranged opposite to each other, the inner ring of shrapnel 3211 is connected to the outer ring of shrapnel through the first connecting bridge 3213 and the second connecting bridge 3214
  • the inner edge of 3212 is fixedly connected, and the control assembly 31 can control the inner ring of shrapnel 3211 to deflect with the first straight line where the first connecting bridge 3213 and the second connecting bridge 3214 are located as the rotation axis; the outer edge of the outer ring of shrapnel 3212 has opposite settings
  • the control assembly 31 can control the outer ring of the shrapnel 3212 to deflect the second straight line where the third connecting bridge 3215 and the fourth connecting bridge 3216 are located as the rotation axis, of which the first straight The line and the second straight line are not parallel.
  • the transparent mirror 322 can be driven to deflect synchronously with the first straight line as the rotation axis; the outer ring of shrapnel
  • the transparent mirror 322 can be driven to deflect with the second straight line as the rotation axis.
  • the transparent lens 322 can be deflected around two non-parallel rotation axes, respectively, so that the image can be deflected in the two-dimensional coordinate system, that is, the image is not parallel.
  • the pixel points are deflected in the two-dimensional coordinate system.
  • the shrapnel inner ring 3211, the shrapnel outer ring 3212, the first connecting bridge 3213, the second connecting bridge 3214, the third connecting bridge 3215, the fourth connecting bridge 3216, the first fixed arm 3217, and the second fixed arm 3218 It can be integrally formed, so that the strength of the deflecting elastic piece 321 can be ensured, and the above-mentioned structures are not easily broken.
  • the material of the deflection shrapnel 321 can be iron, cobalt, nickel and other easily magnetized metal materials
  • the material of the shrapnel inner ring 3211 and shrapnel outer ring 3212 can also be iron, cobalt, nickel, etc. Magnetized metal material.
  • the control assembly 31 can directly control the deflection of the shrapnel inner ring 3211 and the shrapnel outer ring 3212 based on the principle of magnetic attraction or repulsion.
  • the inner ring of shrapnel 3211 can be rectangular or circular.
  • the shape of the inner ring of shrapnel 3211 can be the same as that of the transparent lens 322.
  • the outer ring of shrapnel 3212 can be the same shape as the inner ring of shrapnel 3211.
  • the elastic sheet outer ring 3212 can also be set in other different shapes, which is not limited in the embodiment of the present application.
  • the first connecting bridge 3213, the second connecting bridge 3214, the third connecting bridge 3215, and the fourth connecting bridge 3216 can all be small and extraordinarily elongated sheet-like structures, so as to be twisted under the action of external force, thereby facilitating the inner ring of the shrapnel
  • the 3211 and the outer ring of the shrapnel 3212 are flexibly deflected.
  • Both the first fixed arm 3217 and the second fixed arm 3218 may have a rectangular sheet-like structure, of course, may also be a sheet structure of other shapes, which is not limited in the embodiment of the present application.
  • the first straight line may coincide with the central axis of the inner ring 3211 of the shrapnel in the plane direction, and of course, it may also have a certain distance from the central axis.
  • the second straight line may coincide with the center axis of the outer ring 3212 of the elastic sheet along the plane direction, and of course, it may also be at a certain distance from the center axis, which is not limited in the embodiment of the present application.
  • the first straight line can be perpendicular to the second straight line.
  • the transparent lens 322 can be deflected around two vertical rotation axes respectively, thereby realizing the angle between the image along the first straight line and the second straight line.
  • the bisector of the bisector is offset, showing a clearer 4k effect.
  • the first straight line and the second straight line may also be at other angles, which is not limited in the embodiment of the present application.
  • the outer edge of the shrapnel inner ring 3211 has at least one first metal protrusion along the direction perpendicular to the first straight line
  • the outer edge of the shrapnel outer ring 3212 has at least one first metal protrusion along the direction perpendicular to the second straight line.
  • the control assembly 31 can control each first metal protrusion and each second metal protrusion to approach or move away from the control assembly 31.
  • control assembly 31 can control the inner shrapnel 3211 and the outer shrapnel ring 3212 based on the specific positions of the first metal protrusion and the second metal protrusion to ensure precise control of the deflection of the shrapnel inner ring 3211 and the shrapnel outer ring 3212.
  • both the first metal protrusion and the second metal protrusion may have a rectangular sheet-like structure, of course, may also be structures of other shapes, which is not limited in the embodiment of the present application.
  • the first metal protrusion may be integrally formed with the elastic sheet inner ring 3211, and the second metal protrusion may be integrally formed with the elastic sheet outer ring 3212.
  • the first metal protrusions can be provided on the elastic sheet inner ring 3211 with the first connecting bridge 3213 and the second connecting bridge 3213.
  • a side of the bridge 3214 that is not connected, and the control assembly 31 can make the side of the shrapnel inner ring 3211 close to or away from the control assembly 31, so that the shrapnel inner ring 3211 can be easily deflected with the first straight line as the rotation axis.
  • the two first metal protrusions may be respectively disposed on the two opposite sides of the inner ring 3211 of the elastic sheet that are not connected to the first connecting bridge 3213 and the second connecting bridge 3214. side.
  • the control assembly 31 can make one side of the inner ring 3211 of the elastic sheet close to the control assembly 31 based on one of the first metal protrusions, and at the same time make the first metal protrusion based on the other first metal protrusion.
  • One side of the inner ring of shrapnel 3211 where the metal protrusions are located is far away from the control assembly 31, so that the inner ring of shrapnel 3211 is deflected with the first straight line as the rotation axis.
  • the number of the first metal protrusions can also be set to two or more, as long as it facilitates the deflection of the elastic sheet inner ring 3211 with the first straight line as the rotation axis, which will not be repeated in the embodiment of the present application.
  • the number of the second metal protrusions can be one, or it can be two or more, and the arrangement of the second metal protrusions can be the same as the arrangement of the first metal protrusions. No longer.
  • the materials of the first metal protrusion and the second metal protrusion can also be iron, cobalt, nickel, etc. Magnetized metal material.
  • the first metal protrusion can increase the magnetization area of the shrapnel inner ring 3211
  • the second metal protrusion can increase the magnetization area of the shrapnel outer ring 3212, thereby facilitating the control of the shrapnel inner ring 3211 and the shrapnel outer ring 3212 by the control assembly. .
  • the shrapnel inner ring 3211 may not include the first metal protrusions, and the shrapnel outer ring 3212 may not include the second metal protrusions, as long as the control assembly can achieve control penetration based on the shrapnel inner ring 3211 and the shrapnel outer ring 3212.
  • the deflection and resetting of the light mirror is sufficient, which is not limited in the embodiment of the present application.
  • the galvanometer 3 may further include a plurality of first fixing screws 323, and the first fixing arm 3217 and the second fixing arm 3218 may be connected to the control assembly 31 through the plurality of first fixing screws 323.
  • the first fixed arm 3217 and the second fixed arm 3218 can also be welded on the control assembly 31, which is not limited in the embodiment of the present application.
  • first fixing arm 3217 and the second fixing arm 3218 are respectively fixedly connected to the control assembly 31 by the first fixing screw 323, they can be between the first fixing arm 3217 and the corresponding first fixing screw 323, and the second fixing arm A damping rubber ring is arranged between the 3218 and the corresponding first fixing screw 323 to reduce the deflection of the outer ring of the shrapnel 3212, between the first fixing arm 3217 and the corresponding first fixing screw 323, and the second fixing arm 3218 and The noise generated between the corresponding first fixing screws 323.
  • the control component 31 may include a PCB (Printed Circuit Board, printed circuit board) 311, and a control coil (not shown) is printed on the PCB 311; the PCB 311 passes through at least three second The fixing member is fixed on the support plate 2; a third light-transmitting hole is formed on the PCB311, the light-transmitting component 32 is fixed on the PCB311, and the coverage area of the orthographic projection of the light-transmitting component 32 on the PCB311 and the third light-transmitting hole are located The area has an overlapping part, and the light-transmitting component 32 is arranged with a gap between the PCB311; a control circuit is also printed on the PCB311, and the control circuit is electrically connected to the control coil.
  • the control circuit is used to adjust the current direction of the control coil at the first frequency to pass the control coil
  • the magnetic field generated after power-on controls the light-transmitting component 32 to switch between deflection and reset at the first frequency.
  • the PCB 311 is fixed on the support board 2 by at least three second fixing members, and the at least three second fixing members are surrounded by a polygon, the PCB 311 can be fixed on the support board 2 more stably based on the plane where the PCB 311 is located. Since the coverage area of the orthographic projection of the light-transmitting component 32 on the PCB311 and the area where the third light-transmitting hole is located have an overlap, the light beam can smoothly pass through the light-transmitting component 32 and the PCB311 board based on the overlap. In addition, since the control coil is printed on the PCB 311, the overall volume of the control assembly 31 can be reduced, and the miniaturization design of the control assembly 31 can be realized.
  • the light-transmitting component 32 includes the deflection elastic piece 321
  • the material of the deflection elastic piece 321 can be easily magnetized, the magnetic field generated after the control coil is energized can attract or repel the deflection elastic piece 321, which can be based on the deflection.
  • the elastic piece 321 controls the deflection and resetting of the light-transmitting component 23.
  • the deflection spring 321 arranged in the gap with the control coil can be magnetized.
  • the elastic piece 321 can be attracted by the control coil, and then the deflection elastic piece 321 is close to the control coil to realize deflection, thereby realizing the deflection of the light-transmitting component 32.
  • the deflection spring 321 when the current direction of the control coil changes, due to the hysteresis phenomenon of the magnetized deflection spring 321, the direction of the magnetic field of the deflection spring 321 is temporarily opposite to the direction of the magnetic field of the control coil, and the deflection spring 321 can be repelled by the control coil, thereby The deflection spring 321 gradually moves away from the control coil.
  • the deflection spring 321 moves away from the control coil, the deflection spring 321 passes through the position when the deflection spring 321 is not deflected, that is, the initial position of the deflection spring 321. In this way, the deflection spring 321 can be reset. Further, the deflection elastic piece 321 will repeat the above process to achieve multiple deflection and resetting, which will not be repeated in the embodiment of the present application.
  • control circuit can also switch the control coil between power-off and power-on at the first frequency, so that the light-transmitting component can be switched between deflection and reset at the first frequency.
  • the deflection shrapnel 321 arranged in the gap with the control coil can be magnetized.
  • the magnetized deflection shrapnel 321 has the same magnetic field direction as the control coil, so the deflection shrapnel 321 can be attracted by the control coil.
  • the deflection elastic piece 321 is close to the control coil to achieve deflection.
  • control circuit can energize and de-energize the control coil at the first frequency, so that the light-transmitting component 32 can be switched between deflection and reset at the first frequency.
  • the control coil may be a solenoid, and the central axis of the solenoid may be perpendicular to the plane direction of the light-transmitting component 32, so that the direction of the magnetic field generated by the solenoid after it is energized can be perpendicular to the plane direction of the light-transmitting component 32, Thus, the attraction and repulsion of the light-transmitting component 32 can be realized.
  • the control coil can also be other types of coils, as long as it can attract or repel the light-transmitting component 32 after being energized, which will not be repeated in this embodiment of the present application.
  • the shape of the third light transmission hole can be rectangular or circular, the shape and size of the third light transmission hole can be consistent with the first light transmission hole, and the center point of the third light transmission hole is the same as the first light transmission hole.
  • the connection line of the center point can be perpendicular to the plane direction of the light-transmitting component 32.
  • the third light-transmitting hole can also be arranged in other forms, as long as it does not interfere with the propagation of the light beam. This is not done in the embodiment of the application. limited.
  • control coil may be located close to the edge of the light-transmitting component 32, so that when the control coil attracts or repels the light-transmitting component 32, the light-transmitting component 32 is easily deflected.
  • the control coil may include at least one first sub-control coil and at least one second sub-control coil, and each first sub-control coil and each second sub-control coil are electrically connected to the control circuit, and the control circuit Used to adjust the current direction of each first sub-control coil and each second sub-control coil at the first frequency; in the case that the deflection spring 321 includes the spring inner ring 3211 and the spring outer ring 3212, at least one first sub control After the coil is energized, the inner ring 3211 of the magnetic control shrapnel is deflected with the first straight line as the rotation axis, and the magnetic field control shrapnel outer ring 3212 generated after the at least one second sub-control coil is energized is deflected with the second straight line as the rotation axis.
  • At least one first sub-control coil can realize the deflection of the inner ring of shrapnel 3211
  • at least one second sub-control coil can realize the deflection of the outer ring of shrapnel 3212, and the cooperation of the first sub-control coil and the second sub-control coil can be realized.
  • the translucent mirror 322 respectively rotates around the first straight line and the second straight line as the rotation axis.
  • the number of the first sub-control coils and the first metal protrusions may be the same, and one One-to-one correspondence, and each first sub-control coil can be arranged at a position directly below the corresponding first metal bump; the number of the second sub-control coil and the second metal bump can be the same, and one-to-one correspondence, and each The second sub-control coil may be arranged at a position directly below the corresponding second metal protrusion.
  • the materials of the first metal protrusion and the second metal protrusion can be easily magnetized materials, the first metal protrusion and the second metal protrusion can increase the magnetization area of the shrapnel inner ring 3211 and the shrapnel outer ring 3212, respectively Therefore, it is advantageous for the first sub-control coil to attract and repel the elastic sheet inner ring 3211 based on the first metal protrusion, and the second sub-control coil to attract and repel the elastic sheet outer ring 3212 based on the second metal protrusion.
  • the galvanometer 3 may further include at least three second damping rubbers corresponding to the at least three second fixing members one-to-one, and each second fixing member passes through the corresponding second damping rubber and the PCB311. Board, and fixedly connected with the support board 2. In this way, the second damping rubber can prevent the corresponding second fixing member from colliding with the PCB311 board, thereby significantly reducing the volume of noise.
  • the second fixing member may be a shoulder screw.
  • the second damping rubber may be sleeved on the shoulder of the shoulder screw, and the length of the second damping rubber in the direction of the central axis of the shoulder screw may be greater than that of the shaft.
  • the length of the shoulder and the second damping rubber can avoid direct contact between the PCB311 board and the shaft shoulder, thereby avoiding the collision between the second fixing member and the PCB311 board.
  • the second fixing member may also be other types of screws, which will not be repeated in the embodiment of the present application.
  • the optical-mechanical system 01 may also include a heat-conducting plate 6.
  • the heat-conducting plate 6 is fixedly connected to the optical-mechanical housing 4 and is located between the DMD 1 and the galvanometer 3, and the heat-conducting plate 6 is configured to absorb the heat in the optical engine housing 4 and receive part of the light beams rotated and reflected by the DMD 1 so as to transfer the heat in the optical engine housing 4 and the heat generated by the partial light beams to the optical engine housing 4.
  • part of the light beam can be prevented from directly irradiating the control assembly 31 and the light-transmitting assembly 32 included in the galvanometer 3, thereby preventing excessive heat from accumulating on the control assembly 31 and increasing the temperature of the control coil included in the control assembly 31, and also preventing the transmission
  • the temperature of the optical component 32 is increased to cause deformation and other consequences, which can avoid the failure of the galvanometer 3 and improve the reliability of the galvanometer 3.
  • the heat conducting plate 6 can also conduct the heat in the internal space of the optomechanical housing 4 to the optomechanical housing 4, and then the optomechanical housing 4 radiates the heat to the outside of the optomechanical housing 4, thereby realizing the optical engine housing 4 Efficient heat dissipation inside.
  • some of the light beams may be light beams that are not directly emitted to the lens 02 after being rotated and reflected by the DMD1. Since part of the light beam will not be directly used for projection, it can be directly received by the heat conducting plate 6 without affecting the projection of the optical engine.
  • the material of the heat conducting plate 6 can be copper, aluminum, and other materials with excellent heat conductivity, so as to achieve efficient heat absorption and heat conduction.
  • the surfaces of the heat-conducting plate 6 and the opto-mechanical housing 4 can be coated with light-absorbing materials, thereby enhancing the heat-absorbing effect of the heat-conducting plate 6 and the opto-mechanical housing 4.
  • the homogenization component may be a light pipe or the like.
  • the light pipe may be arranged on the bottom surface of the optical engine housing 4, and one end of the light pipe faces the optical engine housing 4
  • the other end of the light guide faces the light entrance side of the lens assembly 71, and the center line of the light guide coincides with the main optical axis of the lens assembly 71.
  • the light pipe is used to homogenize the light beam emitted by the light source 00 and emit the homogenized light beam to the lens assembly 71.
  • the light pipe when the light pipe is fixed on the bottom surface of the optical machine housing 4, in order to avoid assembly deviation of the components included in the optical machine system 01, resulting in the spot formed by the light beam not covering the working area of the DMD1, the light pipe can Adjustable and fixed on the bottom surface of the optical engine housing 4.
  • the fixing method of the light pipe can refer to the prior art, which is not limited in the embodiment of the present application.
  • the size of the rectangular light pipe can be in a preset ratio with the size of the DMD1 to ensure that the beam shaped by the lens assembly 71 can exactly cover the working area of the DMD1, thereby ensuring the imaging effect of the optical engine while avoiding Because the light beam hits the non-working area of DMD1, the temperature of the non-working area of DMD1 increases.
  • two limit springs and one limit boss may be provided on the optical machine housing 4, and the limit boss is used to face the TIR prism based on the bottom of the TIR prism.
  • the two limiting elastic pieces respectively abut the two side walls of the TIR prism that are not used to propagate light beams.
  • two limit springs and one limit boss can apply a bearing force to the three bearing surfaces of the TIR prism to ensure the position accuracy of the TIR prism, thereby improving the projection effect of the optical engine.
  • the support plate can more stably fix the galvanometer on the opto-mechanical housing, so that the vibration In the process of mirror deflection, it is not easy to drive the support plate to resonate, so that noise is not easily generated between the support plate and the optical engine housing, and the effect of excessive noise on the performance of the optical engine is avoided.
  • the support plate is provided with the first light transmission hole, and the coverage area of the orthographic projection of the galvanometer on the support plate and the area where the first light transmission hole is located have an overlap, the light beam can pass through the galvanometer and the first light transmission hole Hole to achieve spread.
  • the galvanometer can deflect the light beam after the rotation and reflection of the DMD during deflection, and can emit the deflected light beam and the undeflected light beam to the lens, and the lens can realize transmission imaging.
  • the inner ring of the shrapnel and the outer ring of the shrapnel can realize the deflection of the transparent mirror in different directions.
  • the first sub-control coil can realize the independent control of the inner ring of the shrapnel, and the second sub-control coil can realize the independent control of the outer ring of the shrapnel.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

La présente invention concerne un moteur optique, comprenant une source de lumière (00), un système de machine optique (01) et une lentille (02), la source de lumière (00) étant utilisée pour émettre un faisceau de lumière. Le système de moteur optique (01) comprend un dispositif de micromiroir numérique (DMD) (1), une plaque de support (2), un miroir vibrant (3) et un boîtier de moteur optique (4). Le DMD (1) est disposé à l'intérieur du boîtier de moteur optique (4) ; la plaque de support (2) est reliée de manière fixe au boîtier de moteur optique (4) au moyen d'au moins trois premiers éléments de fixation (5) ; et le miroir vibrant (3) est relié de manière fixe à la plaque de support (2) au moyen d'au moins trois seconds éléments de fixation ; et le miroir vibrant (3) peut commuter entre la déviation et la réinitialisation à une première fréquence afin de dévier le faisceau lumineux réfléchi par le DMD pendant la déviation. La lentille (02) est fixée à un côté de sortie de lumière du boîtier de moteur optique (4).
PCT/CN2021/082122 2020-04-20 2021-03-22 Moteur optique WO2021213105A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US17/731,596 US20220256129A1 (en) 2020-04-20 2022-04-28 Projection apparatus and projection display method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202020597629.XU CN212364781U (zh) 2020-04-20 2020-04-20 光学引擎
CN202020597629.X 2020-04-20

Related Child Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/081912 Continuation-In-Part WO2021213101A1 (fr) 2020-04-20 2021-03-19 Dispositif de projection

Publications (1)

Publication Number Publication Date
WO2021213105A1 true WO2021213105A1 (fr) 2021-10-28

Family

ID=74133150

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2021/082122 WO2021213105A1 (fr) 2020-04-20 2021-03-22 Moteur optique

Country Status (2)

Country Link
CN (1) CN212364781U (fr)
WO (1) WO2021213105A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN212364781U (zh) * 2020-04-20 2021-01-15 青岛海信激光显示股份有限公司 光学引擎
WO2022078410A1 (fr) * 2020-10-14 2022-04-21 青岛海信激光显示股份有限公司 Appareil de projection

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2784567A1 (fr) * 2013-03-29 2014-10-01 Funai Electric Co., Ltd. Élément vibrant de miroir
CN205721053U (zh) * 2016-06-07 2016-11-23 海信集团有限公司 成像位移组件和投影装置
CN106990526A (zh) * 2017-05-17 2017-07-28 青岛海信电器股份有限公司 一种振镜结构
CN108646504A (zh) * 2018-03-22 2018-10-12 青岛海信电器股份有限公司 一种应用于激光投影装置中的振镜支架
CN110109317A (zh) * 2017-04-26 2019-08-09 海信集团有限公司 照明装置和激光投影机
CN110412821A (zh) * 2019-07-31 2019-11-05 青岛海信激光显示股份有限公司 激光投影设备及照明光学***
CN211878401U (zh) * 2020-04-20 2020-11-06 青岛海信激光显示股份有限公司 激光投影设备
CN212364781U (zh) * 2020-04-20 2021-01-15 青岛海信激光显示股份有限公司 光学引擎

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2784567A1 (fr) * 2013-03-29 2014-10-01 Funai Electric Co., Ltd. Élément vibrant de miroir
CN205721053U (zh) * 2016-06-07 2016-11-23 海信集团有限公司 成像位移组件和投影装置
CN110109317A (zh) * 2017-04-26 2019-08-09 海信集团有限公司 照明装置和激光投影机
CN106990526A (zh) * 2017-05-17 2017-07-28 青岛海信电器股份有限公司 一种振镜结构
CN108646504A (zh) * 2018-03-22 2018-10-12 青岛海信电器股份有限公司 一种应用于激光投影装置中的振镜支架
CN110412821A (zh) * 2019-07-31 2019-11-05 青岛海信激光显示股份有限公司 激光投影设备及照明光学***
CN211878401U (zh) * 2020-04-20 2020-11-06 青岛海信激光显示股份有限公司 激光投影设备
CN212364781U (zh) * 2020-04-20 2021-01-15 青岛海信激光显示股份有限公司 光学引擎

Also Published As

Publication number Publication date
CN212364781U (zh) 2021-01-15

Similar Documents

Publication Publication Date Title
CN211878401U (zh) 激光投影设备
WO2021213105A1 (fr) Moteur optique
US7880965B2 (en) Projection-type image display device
TWI737875B (zh) 光路調整機構及其製造方法
US11500195B2 (en) Light path adjustment mechanism
US20210141213A1 (en) Light path adjustment mechanism
TWI698696B (zh) 光路調整機構及其製造方法
CN110543075B (zh) 一种消散斑装置及投影***
US20200301118A1 (en) Light path adjustment mechanism
JP4854782B2 (ja) 投写型画像表示装置
CN106094242A (zh) 一种用于消除画面激光散斑的光场扫描器
US20230350280A1 (en) Projection apparatus
CN113126310A (zh) 一种匀光装置和显示设备
CN112859496B (zh) 投影成像***
JP5387222B2 (ja) 光偏向器
TWI670518B (zh) 光路調整裝置
KR20070100579A (ko) 화소 증진 조립체 및 이를 포함하는 영상투사장치
JP2002328317A (ja) 光偏向器
TWI765235B (zh) 光路調整機構及其製造方法
CN219916155U (zh) 像素扩展装置及投影设备
TWI738482B (zh) 投影系統
CN101089722B (zh) 光学投影***及其影像平滑装置
JP2004240308A (ja) 光線方向変更装置、光スイッチ及び光ヘッド
JP2005173435A (ja) 光偏向器
US9599811B2 (en) Optical device and image display device

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 21792415

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 21792415

Country of ref document: EP

Kind code of ref document: A1