CN117250717A - Light path adjusting mechanism and optical mechanism - Google Patents

Abstract

The embodiment of the present invention provides an optical path adjustment mechanism and an optical mechanism. The optical path adjustment mechanism includes an outer frame, an optical component, a light shielding member and a coil. The optical component is arranged in the outer frame, and the light-shielding member is arranged between the optical path of the lens and the light valve, and there is a vacant area in the middle of the light-shielding member to expose the lens. The multi-layer coil is wound around the outer periphery of the lens, and the axial direction of the multi-layer coil is substantially parallel to the optical axis direction of the lens. Through the embodiments of the present invention, because at least part of the structure of the actuating component can be directly disposed on the linkage, the overall volume, weight and number of components of the optical path adjustment mechanism can be greatly reduced, which is beneficial to miniaturization or thinning of the optical path adjustment mechanism. Paired with various micro electronic devices. The light shield can be placed outside the effective light path of the optical component to avoid blocking the image light that should enter the optical component, and can reduce or prevent the image light of the light valve or stray light in the system from irradiating components such as coils or magnetic materials, reducing the coil Or the magnet heats up, and the light-shielding structure can reduce unnecessary light entering the lens and improve contrast.

Description

Optical path adjustment mechanism and optical mechanism

This application is a re-divisional application of a divisional application. The filing date of the original application was December 30, 2016. The original application The application number is: 201611257162.9 (the application number of the divisional application is: 202110493217.0; the filing date of the divisional application is: May 7, 2021), the name of the invention originally applied for is "Optical Path Adjustment Mechanism and Optical Mechanism" (the invention of the divisional application The name is: "Optical path adjustment mechanism and optical mechanism").

Technical field

The invention relates to an optical path adjustment mechanism and an optical mechanism.

Background technique

In recent years, various image display technologies have been widely used in daily life. In an image display device, for example, a light path adjustment mechanism can be provided to change the light path of light in the device to provide various effects such as increasing imaging resolution and improving picture quality. However, the known optical path adjustment mechanism has a large number of components, weight, and volume, making it difficult to further miniaturize it. Therefore, there is an urgent need for an optical path adjustment mechanism design that has a simple structure, high reliability, and can significantly reduce weight and volume.

Contents of the invention

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the embodiments of the present invention.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, an optical component, a light shielding member and a coil. The optical component is arranged in the outer frame, the light shielding member is arranged outside the effective optical path of the optical component, and the axis of the coil is substantially parallel to the normal direction of the optical component and is wound around the optical component in multiple turns.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, an optical component, a coil group and a control mechanism. The optical component is arranged in the outer frame, and the coil group is wound outside the optical component. The coil group has multiple layers of coils that are stacked substantially along the normal direction of the optical component, and the control mechanism is installed between the optical component and the outer frame. between. The optical component can be a lens, and the coil group is wound around the periphery of the lens. The optical component can also be arranged on a carrier, and the coil group is wound around the periphery of the carrier. The control parts may be springs, leaf springs, wire springs, flexible sheet parts or flexible leaf parts. The coil group is wound within a range, and the control mechanism is located outside the winding range.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a magnetic body, a linking component, a coil group and a transmission component. The magnetic body is arranged on the frame, and the linking member includes an optical component that can deflect light contained in the frame. When the linking member is not driven, the optical component and the magnetic body are substantially located on the same horizontal plane, and the coil group is wound on on the linking parts, and the transmission parts connected between the linking parts and the frame. When the linkage member is driven and rotates in the first rotation direction, the transmission member exerts a restoring force that causes the linkage member to rotate in the opposite direction to the first rotation direction. The optical component may be a lens. The linking member includes a lens and a lens holder for accommodating the lens. The coil group is wound around the periphery of the lens holder, and the magnetic body may include a magnet or a coil. The transmission component may be two leaf springs located at both ends of the linkage member. Each leaf spring overlaps the linkage member and the frame respectively, and the coupling directions of the two leaf springs may substantially coincide with the rotation axis of the linkage member. The transmission component may be a leaf spring across the linking member, and the leaf spring has an annular portion and two extension portions extending from the annular portion toward both ends of the linking member, and each extension portion overlaps the linking member and the frame respectively. .

An embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, an optical component, a control mechanism and at least one magnetic body. The optical component is located in the outer frame and operates with a rotation axis as the axis. The control mechanism is located between the optical component and the outer frame. The magnetic body is located on the outer frame. The two ends of the magnetic body are connected and do not rotate in parallel. axis, and when the optical component is not in motion, the magnetic body and the optical component are substantially located on the same horizontal plane, and the coil group is wound outside the optical component.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a linking component, a transmission component, at least one magnetic material and a coil. The linkage piece includes a lens, which is accommodated in the frame. Both ends of the transmission member are respectively connected between the linkage piece and the frame. The magnetic material is provided on the frame, and the two ends of the magnetic material are connected to the extension line and intersect with the transmission line. Both ends of the machine are connected with extension wires, and the coil surrounds the lens. The transmission component may be two leaf springs located at both ends of the linking member or a leaf spring across the linking member.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, a lens, a coil and a control mechanism. The lens is arranged in the outer frame, and the control mechanism is arranged between the lens and the outer frame. The contact part between the control mechanism and the lens forms a first contact point, and the contact part between the control mechanism and the outer frame forms a second contact point. The first contact point and the second contact point have substantially different horizontal heights and are wound around a coil outside the lens.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a linkage component, a coil group and a transmission component. The linking member includes an optical component that can deflect light, a coil group, and is wound on the linking member. The transmission member has a first end and a second end that are substantially opposite. The first end is connected to the linking member, and the second end is connected to the linking member. The ends are connected to the frame, and at least one turning point is included between the first end and the second end. The first end and the second end may respectively include two surfaces that are substantially perpendicular to each other.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a lens and a coil. A step portion including a side wall is provided in the thickness direction of the outer edge of the lens, and the coil is wound around the side wall of the step portion of the lens.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes a linkage component, a coil group and a transmission component. The linkage component includes an optical component that can deflect light, and a recessed portion is provided on the circumferential thickness direction of the linkage component. The coil group is wound around the recessed portion of the linkage component and surrounds the optical component and the transmission mechanism. One end is connected to the linkage. The coil group may have a plurality of layers of coils stacked substantially along the normal direction of the optical component, and a plurality of discontinuous recessed portions may be provided in the thickness direction of the peripheral edge of the linking member.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, an optical component and a coil group. The outer frame forms a gap at one end adjacent to the light valve module, and a part of the light valve module extends into the gap. The optical component can be placed in the outer frame, and the coil group surrounds the optical component.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a lens and a coil. The frame forms an extension at one end adjacent to the light valve module, and the extension forms an overlapping relationship with at least two side surfaces of the light valve module. The lens can be disposed in the frame, and the coil can be disposed between the frame and the lens. The extension part may include a lug structure, the projection of the extension part along the horizontal or vertical direction is projected to at least part of the light valve module, and the frame may cover the internal total reflection prism.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a light valve module, a reflective lens and an optical path adjustment mechanism. The light valve module includes a light valve and a first lens with a first surface. The reflective lens is adjacent to the light valve module and the linear distance from the first surface is less than 2 mm. The optical path adjustment mechanism is adjacent to the reflective lens. The optical path adjustment mechanism may have a second lens with a second surface, and the linear distance between the second surface and the reflective lens is less than 3 mm.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes an optical component, a rotating shaft and a coil. The rotating shaft is connected to the optical component, the coil is wound around the periphery of the optical component, and the optical component and the rotating shaft are integrally formed. The optical component can be a lens, the rotating axis can be composed of a transmission component or a control component, the coil can be wound around a range and the rotating axis is located outside the winding range.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, a bearing base, a lens, a coil and a control mechanism. The lens is placed on the bearing base, the coil is wound around the periphery of the bearing base, the control mechanism is placed between the bearing base and the outer frame, and the optical path adjustment mechanism meets one of the following conditions: (1) the control mechanism and the bearing base are integrally formed; and (2) the control mechanism, outer frame and lens are integrated. The control parts may be springs, leaf springs, wire springs, flexible sheet parts or flexible leaf parts.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a lens holder, a coil group and a transmission component. The lens holder is accommodated in the frame and includes a lens. The coil group is wound on the lens holder. The transmission component is connected between the lens holder and the frame. Among the three components of the frame, the lens holder and the transmission component, at least one of them The two are formed into one piece. The coil group is wound around a range, and the transmission component can be located outside the winding range. The material of the one-piece component is made of metal or plastic, and the coil has a direction substantially along the normal direction of the one-piece component. Stacked multiple layers of coils.

One embodiment of the present invention provides an optical path adjustment mechanism, which includes an outer frame, a linkage component, a coil, a transmission component and at least one magnetic body. The linking piece is arranged in the outer frame and includes a lens. The coil is wound on the outer frame and surrounds the lens. The magnetic body is arranged on the linking piece. The magnetic body includes a magnet and the magnet is arranged on the lens. The number of at least one magnetic body can be two. The lens moves with a rotation axis as its axis, and the two magnetic bodies are respectively located on both sides of the rotation axis. Each magnetic body has The connection between the two ends is not parallel to the axis of rotation, the coil is wound around a range, and the magnetic body is located within the winding range, and the transmission component is connected between the linking component and the outer frame.

An embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a linkage member and a coil group. The linkage is accommodated in the frame. The linkage includes an optical component that can deflect light, a magnetic material located around the optical component, and a control mechanism. The control mechanism is located between the optical component and the frame. The coil group is wound Set on the frame and surrounding the optical components. The control mechanism can be a spring, a leaf spring, a wire spring, a flexible sheet-like mechanism or a flexible leaf-shaped mechanism. When the linkage is driven and rotates along the first rotation direction, the control mechanism can exert a force. The linkage member has a restoring force when it rotates in a direction opposite to the first rotation direction. The linkage member may include a bearing base, and the optical component and the magnetic material are disposed on the bearing base.

Through the design of the embodiment of the present invention, since at least part of the structure of the actuating component can be directly disposed on the linkage, the overall volume, weight and number of components of the optical path adjustment mechanism can be greatly reduced, which is beneficial to miniaturization or thinning of the optical path adjustment mechanism. to match various micro electronic devices. Furthermore, the light-shielding structure of the embodiment of the present invention can be provided outside the effective optical path of the optical component to avoid blocking the image light that should enter the optical component, and can reduce or prevent the image light of the light valve or the stray light in the system from irradiating the coil. Or magnetic materials and other components to reduce the possibility of malfunction due to heating of the coil or magnet, and the light-shielding structure can reduce unnecessary light entering the lens and improve contrast.

Other objects and advantages of the present invention can be further understood from the technical features disclosed in the present invention. In order to make the above and other objects, features and advantages of the present invention more obvious and understandable, the following embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description These are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without exerting any creative effort.

Figure 1 is an exploded view of the optical path adjustment mechanism according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of the optical path adjustment mechanism of FIG. 1 after assembly.

Figure 3 is a schematic diagram of the actuation state of the linkage member according to an embodiment of the present invention.

Figure 4 is an exploded view of the optical path adjustment mechanism according to another embodiment of the present invention.

FIG. 5 is a schematic diagram of the optical path adjustment mechanism of FIG. 4 after assembly.

6A and 6B are respectively schematic diagrams of a connector according to an embodiment of the present invention.

FIG. 7A is a schematic diagram of an optical path adjustment mechanism according to an embodiment of the present invention, and FIG. 7B is an enlarged cross-sectional schematic diagram cut along line A-A’ in FIG. 7A .

Fig. 8A is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention, and Fig. 8B is an enlarged sectional schematic diagram cut along line B-B' of Fig. 8A.

FIG. 9 is a schematic diagram of a coil accommodation structure according to an embodiment of the present invention.

Figure 10 is a schematic diagram of an actuator assembly according to another embodiment of the present invention.

FIG. 11 is a schematic diagram of an optical path adjustment mechanism applied to an optical system according to an embodiment of the present invention.

FIG. 12A is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention.

Figure 12B is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention.

Figure 13 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention.

Figure 14 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention.

15A is an exploded view of the optical path adjustment mechanism and other optical components according to another embodiment of the present invention. FIGS. 15B and 15C are respectively side and top views of the optical path adjustment mechanism and other optical components in FIG. 15A after assembly.

FIG. 16A is a schematic diagram of an optical path adjustment mechanism combined with other optical components according to another embodiment of the present invention.

FIG. 16B is a schematic diagram of an optical path adjustment mechanism combined with other optical components according to another embodiment of the present invention.

FIG. 17A is an exploded view of the optical path adjustment mechanism and other optical components according to another embodiment of the present invention. FIGS. 17B and 17C are respectively side and top views of the optical path adjustment mechanism and other optical components in FIG. 17A after assembly.

Figure 18 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention.

Reference number:

100, 100a, 100b, 100c optical path adjustment mechanism

110 linkage

112 lenses

112a, 112b fixing holes

116 Staircase

116a side wall

120 Actuation assembly

122 coil set

122a coil

124 magnets

Section 1241, 1242

130 connector

130a neck

132, 134 leaf spring

132a, 132b, 134a, 134b fixing holes

132d, 134d connection part

140 frame

140a, 140b fixing holes

150 Piezoelectric components

200, 200a optical path adjustment mechanism

210 linkage

212 lenses

214 lens holder

214a, 214b fixing holes

216 concave part

220 Actuation Assembly

222 coil set

224 magnet

230 connector

232 leaf spring

232a, 232b, 232c, 232d fixing holes

232e ring part

232f, 232g extension

240 frame

240a, 240b fixing holes

300 Optical Devices

310 lighting system

312 light source

312R, 312G, 312B light emitting diodes

314 beam

314a sub-image

316 light combining device

317 lens array

318 lens set

319 internal total reflection prism

320 digital micromirror device

330 projection lens

340 optical path adjustment mechanism

350 screens

400, 400a, 400b, 400c optical path adjustment mechanism

410 linkage

412 lenses

420 Actuation Assembly

422 coil

424 Magnet

430 connector

440 frame

440a, 440b extension

440c lug construction

440d shading part

442 gap

444 accommodation space

446 opening

448 light shield

450 Light Valve Module

452 lenses

460 internal total reflection prism

A axis of rotation

A1-A3, B1-B3 board

C, D connection

M initial position

N normal direction

P, Q rotation direction

T1, T2 contact points

θ angle

W aspect ratio

E length

F width

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the drawings. Directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only for reference to the directions in the attached drawings. Accordingly, the directional terms used are illustrative and not limiting of the invention.

The disclosure in the following embodiments discloses an optical path adjustment mechanism that can be used in different optical systems (such as display devices, projection devices, etc.) to adjust or change the optical path to provide, for example, improved imaging resolution and improved image quality (elimination of Dark areas, softened image edges) and other effects are not limited, and the location and configuration of the light path adjustment mechanism in the optical system are not limited at all. The optical path adjustment mechanism may include, for example, some or all of a linking component, an actuating component, a connecting component, and a frame. In the various embodiments described below, the linking member may include an optical component that can deflect light, and the linking member may further include a bearing base for carrying the optical component. The actuation form of the linking member may be, for example, rotation. , vibration, movement, etc. are not limited; the actuating component only needs to be able to produce the effect of driving the linkage, and its components are not limited, for example, it can be an electromagnetic induction component including a magnet and a coil group (or coil); connection The parts can have the property of being able to change in the direction of returning to their original size and shape when the external force is removed after deformation. For example, they can be at least slightly elastic or flexible, and the connecting parts can be various transmission parts that can transmit power, or use It is not limited to control parts that buffer vibration or control movement, such as springs, leaf springs, wire springs, flexible sheet-like parts or flexible leaf-like parts, etc.; the frame only needs to be able to define a container The space is sufficient, and it can be a frame or outer frame with different forms or shapes without limitation.

Figure 1 is an exploded view of the optical path adjustment mechanism according to an embodiment of the present invention. As shown in FIG. 1 , the optical path adjustment mechanism 100 includes a linkage or actuator 110 , an actuator component 120 , a connector 130 and a frame or outer frame 140 . In this embodiment, the linking member 110 includes an optical component that can deflect light, such as a lens 112, and the lens 112 only needs to be able to provide the effect of deflecting light, and its form and type are not limited. For example, it can It is a lens (Lens) or a mirror (Mirror). In another embodiment, a bearing base may also be included, and an optical component may be disposed on the bearing base, or the bearing base and the optical component may be integrally formed. In this embodiment, the actuating component 120 can be, for example, an electromagnetic induction component including a coil set 122 and a magnet 124. In another embodiment, for example, another coil set can also be used as a magnetic body or magnetic material to replace the magnet. Another coil group (not shown) on the frame 140 can also generate electromagnetic force with the coil group wound on the linking member 110 to drive the linking member 110 . In this embodiment, the connecting member 130 may be, for example, two leaf springs 132 and 134 with restoring force. The two ends of the plate spring 132 may be provided with fixing holes 132a, 132b, the two ends of the plate spring 134 may be provided with fixing holes 134a, 134b, the two ends of the lens 112 may be provided with fixing holes 112a, 112b, and the two ends of the frame 140 may be provided with Fixing holes 140a, 140b. In an assembly embodiment, the linking member 110 is provided in the frame 140, the magnet 124 can be fixed on the frame 140, the coil group 122 can be wound outside the lens 112 and, for example, can be wound around the periphery of the lens 112, and the leaf spring One end of the plate spring 132 can be fixed to the lens 112 through the corresponding fixing holes 132a and 112a through a fixing member such as a screw (not shown), and the other end of the leaf spring 132 can be fixed to the frame 140 through the corresponding fixing holes 132b and 140a. , so that the plate spring 132 is disposed between the lens 112 and the frame 140 . Furthermore, one end of the plate spring 134 can be fixed to the lens 112 via a fixing member such as a screw (not shown) through the corresponding fixing holes 134a and 112b, and the other end of the plate spring 134 can be fixed to the lens 112 through the corresponding fixing holes 134b and 140b. It is fixed to the frame 140 so that the plate spring 134 is disposed between the lens 112 and the frame 140 . The assembled optical path adjustment mechanism 100 is shown in Figure 2 . Therefore, the plate springs 132 and 134 provided at both ends of the lens 112 can be connected to the lens 112, and the connecting direction of the plate springs 132 and 134 can substantially coincide with the rotation axis A of the linking member 110, and the lens 112 can use the rotation axis A as its axis. The heart reciprocates, for example, the rotation axis A can be used as the axis to rotate or swing clockwise or counterclockwise. As shown in FIG. 3 , in one embodiment, the electromagnetic force between the coil group 122 and the magnet 124 can cause the lens 112 to rotate at an angle θ from the initial position M along the rotation direction P with the rotation axis A as the center, and the leaf springs 132, The restoring force of 134 can rotate the lens 112 back to the initial position M in the opposite rotation direction Q; in another embodiment, another electromagnetic force can be applied between the coil group 122 and the magnet 124 to assist the restoring force of the leaf springs 132 and 134 to rotate the lens 112 back to the initial position M. The lens 112 rotates back to the initial position M along the opposite rotation direction Q, so the lens 112 can swing back and forth to different positions to deflect the incident light to different directions, thereby achieving the effect of adjusting or changing the optical path of the light. In one embodiment, the rotation angle θ of the linking member 110 can range from 0.1 to 1 degree, preferably from 0.2 to 0.5 degrees, and can be, for example, 0.32 degrees. By adjusting or changing the light path through the light path adjustment mechanism of the embodiment of the present invention, different effects can be produced depending on actual needs. For example, it can be used to improve projection resolution, improve image quality (eliminate dark areas, soften image edges), etc. without limitation. Moreover, the location and arrangement of the optical path adjustment mechanism in a device to be used (such as a display device, a projection device, etc.) are not limited at all. Furthermore, the electromagnetic induction component in the above embodiment only needs to be able to produce the effect of driving the actuator 110, and its components are not limited. In another embodiment, for example, another coil group can also be used as a magnetic body instead. The magnet and another coil group provided on the frame 140 can also generate electromagnetic force with the coil group wound on the actuating member 110 to drive the actuating member 110 . In addition, in various embodiments of the present invention, the actuating form of the actuating member is not limited. For example, the actuating member may be a rotating member, a vibrating member, or a linking member. Furthermore, the connector only needs to have the property of being able to change in the direction of returning to its original size and shape when the external force is removed after deformation. For example, it can be at least slightly elastic or flexible. The type of connector is not limited at all. The shape of the leaf spring in the embodiment of the present invention is not limited. Please refer to FIG. 1 again. In one embodiment, the connecting portion 132d of the leaf spring 132 connected to the frame 140 can be substantially perpendicular to the connecting portion 132d of the leaf spring 134 connected to the frame 140. The connection part 134d is not limited. In another embodiment, the connecting portion 132d may be substantially parallel to the connecting portion 134d, but is not limited thereto. Furthermore, in one embodiment, each non-planar leaf spring 132 or 134 may have two faces with an angle. In another embodiment, each non-planar leaf spring 132 or 134 may have two faces that are substantially perpendicular to each other ( (approximately 90 degrees), the rotation centers of the leaf springs 132 and 134 can substantially coincide with the center of mass of the lens 112, but this is not a limitation.

Through the design of the above embodiment, since at least part of the structure of the actuating component (such as a coil group or a coil) is directly disposed on an optical component that can deflect light, the volume, weight, or number of components of the entire optical path adjustment mechanism can be reduced. Therefore, It can simplify the overall structure and improve reliability, and is conducive to miniaturization or thinning to facilitate matching with various micro electronic devices.

FIG. 4 is an exploded view of the optical path adjustment mechanism of another embodiment of the present invention. FIG. 5 is a schematic diagram of the optical path adjustment mechanism of FIG. 4 after assembly. As shown in FIGS. 4 and 5 , in this embodiment, the linkage or actuator 210 of the optical path adjustment mechanism 200 may include, for example, a lens 212 and a lens holder 214 for accommodating the lens 212 . The actuator component 220 may include, for example, a lens 212 . It may be an electromagnetic induction component including a coil set 222 and a magnet 224. The coil set 222 may be wound around the lens holder 214, for example, around the periphery of the lens holder 214, and the magnet 224 may be fixed to the frame 240. The connecting member 230 may be, for example, an integrally formed leaf spring 232 spanning from one end of the lens holder 214 to the other end. The shape of the leaf spring 232 is not limited. In this embodiment, the leaf spring 232 has an annular portion 232e and two extension portions 232f and 232g extending from the annular portion 232e toward both ends of the linking member 210, and the two extension portions The extending directions of 232f and 232g may substantially coincide with the rotation axis A. The two ends of the plate spring 232 may be provided with fixing holes 232a, 232b, 232c, and 232d. The two ends of the lens holder 214 may be respectively provided with a fixing hole 214a (corresponding to the fixing hole 232b) and a fixing hole 214b (corresponding to the fixing hole 232c), and the frame 240 A fixing hole 240a (corresponding to the fixing hole 232a) and a fixing hole 240b (corresponding to the fixing hole 232d) can be respectively provided at both ends. The integrally formed leaf spring 232 can be disposed between the lens holder 214 and the frame 240 by fixing it with fixing parts such as screws (not shown) through these corresponding fixing holes. The extension direction of the plate spring 232 substantially coincides with the rotation axis A of the linkage 210. The linkage 210 (lens 212 together with the lens holder 214) can rotate clockwise or counterclockwise around the rotation axis A, and the restoring force of the plate spring 232 can Rotate the linkage 210 back to the initial position in the opposite direction of rotation. In another embodiment, another electromagnetic force can be applied between the coil assembly 222 and the magnet 224 to assist the restoring force of the leaf spring 232 to rotate the linkage 210 in the opposite direction. The rotation direction rotates back to the initial position, so the linkage 210 can swing back and forth to different positions, so that the lens 212 can deflect the incident light to different directions, thereby achieving the effect of adjusting or changing the optical path of the light.

Through the design of the above embodiment, since at least part of the structure of the actuating component (such as a coil group or a coil) is directly arranged on the lens holder of the linkage, the overall volume, weight or number of components of the optical path adjustment mechanism can be reduced, which is beneficial to the The optical path adjustment mechanism is miniaturized or thinned to match various micro electronic devices.

The shape of the connector in the embodiment of the present invention is not limited. In one embodiment, the connector may have at least one bending part, that is, the connector connects one end of the linking member to the other end of the frame, and both ends There may be at least one turning point in between. For example, as shown in FIGS. 6A and 6B , each leaf spring 132 (or leaf spring extension 232f) and leaf spring 134 (or leaf spring extension 232g) may have at least two faces sandwiched at an angle to form a For a non-planar leaf spring, for example, as shown in Figure 6A, the plate surface A2 of the leaf spring 132 (or the leaf spring extension 232f) can be substantially perpendicular (about 90 degrees included angle) to the plate surface A1 and the plate surface A3, and the plate surface A1 and The plate surface A3 may be substantially parallel, and as shown in FIG. 6B , the plate surface B2 of the plate spring 134 (or the plate spring extension 232g) may be substantially perpendicular to the plate surface B1 and the plate surface B3, and the plate surface B1 and the plate surface B3 may be substantially parallel. vertical. In one embodiment, as shown in FIG. 6A , the contact portion of the leaf spring 132 and the lens 112 can form a first contact point T1, and the contact portion of the leaf spring 132 and the frame 140 can form a second contact point. T2, and the first contact point T1 and the second contact point T2 may have substantially different horizontal heights. Furthermore, please refer to FIG. 1 again, the plate spring 132 is connected to the connecting portion 132d of the frame 140, which can be connected to the connecting portion 134d of the frame 140 substantially vertically, but is not limited to this. In another embodiment, the connecting portion 132d may be substantially parallel to the connecting portion 134d, but is not limited thereto. Therefore, in one embodiment, through the non-planar connector design produced by the bending portions in different directions at both ends of the connector 130, the torsion center of the connector during movement can substantially coincide with the center of mass of the lens 112, but this is not the case. limited.

In one embodiment, the thickness of the connecting member 130 can be less than 0.5mm, for example, the thickness can be 0.1mm, 0.15mm or 0.2mm, and the material of the connecting member 130 can be elastic material (such as spring, leaf spring, wire spring). , metal materials (such as stainless steel, iron, copper, aluminum) or plastic materials. Furthermore, since the neck 130a of the connecting member 130 is too thin and easily broken and too thick may cause unsmooth movement, the aspect ratio W of the neck 130a of the connecting member 130 can range from 0.5 to 1, with a preferred range being 0.6. -0.9, a better range is 0.7-0.8, and can be 0.75, for example. As shown in FIGS. 6A and 6B , the aspect ratio W of the neck portion 130 a can be defined as the length E divided by the width F (W=E/F).

FIG. 7A is a schematic diagram of an optical path adjustment mechanism according to an embodiment of the present invention, and FIG. 7B is an enlarged cross-sectional schematic diagram cut along line A-A’ in FIG. 7A . As shown in FIG. 7A , the coil set 122 has multi-layer coils 122 a substantially stacked along the normal direction N of the lens 112 , so that, for example, the area occupied by the wiring plane of the coil set 122 can be reduced, and the coil set 122 can be wound in circles. There is a range, and control components or transmission components such as the leaf springs 132 and 134 can be located outside the range circled by the coil assembly 122, thereby reducing the risk of the linkage 210 interfering with other components during operation. possibility. As shown in FIG. 7B , a receiving structure can be formed on the periphery of the lens 112 to accommodate the coil assembly 122 . In this embodiment, a corresponding convex portion and a concave portion can be provided on the periphery of the lens 112 in the thickness direction, so that the outer edge of the lens 112 An L-shaped stepped portion 116 is present in the thickness direction, and the coil group 122 can be wound around one side wall 116a of the stepped portion 116 in more than one turn in the thickness direction.

8A is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention, and FIG. 8B is an enlarged sectional schematic diagram cut along line B-B’ of FIG. 8A. As shown in FIG. 8B , when the linkage 210 is not actuated, the lens 212 and the magnet 224 are substantially located on the same horizontal plane to save the space occupied by the components. An accommodating structure can be formed around the edge of the lens holder 214 to accommodate the coil assembly. 222. In this embodiment, a concave portion 216 is provided in the thickness direction of the periphery of the lens holder 214, and the periphery of the lens holder 214 has a C-shaped or U-shaped end surface structure, and the coil assembly 222 can be accommodated in the concave portion. In the lower part 216. That is to say, the accommodating structure for accommodating the coil group can be a step portion or a groove, which can be formed at different positions of the linkage and can have different shapes, such as C-shaped or U-shaped, but it is not limited. It only needs to be able to provide the effect of accommodating the coil group. When the coil group is accommodated in the accommodating structure of the linkage, the space occupied by the coil group can be omitted and the volume of the overall device can be further reduced. Wear and contact between the coil group and other components can be avoided, thereby improving reliability. Furthermore, the arrangement of the coil accommodating structure on the periphery of the linkage is not limited at all. For example, the coil accommodating structure can be continuously formed on the periphery of the linkage as shown in Figure 7A, or include a linkage as shown in Figure 9 There are a plurality of recessed portions 216 spaced apart from each other on the periphery of the member 210.

The connectors in various embodiments of the present invention are only examples. The connectors provided between the optical component and the frame can be various transmission components that can transmit power or control mechanisms used to buffer vibrations or control motion without limitation. , such as springs, leaf springs, wire springs, flexible sheet parts or flexible leaf parts, etc. Furthermore, the optical component of the lens, for example, can be disposed on other carriers and is not limited to the lens holder, and the frame can be frames or outer frames of different forms or shapes without limitation.

In one embodiment, the wire diameter of the coil assembly can be less than 0.2mm, for example, 0.05mm, and the method of fixing the coil assembly on the linkage is not limited. For example, gluing (such as UV dispensing or outer enameled wire) can be used. Gluing), hot welding, socketing, etc. Furthermore, in one embodiment, the power of driving the coil group may be less than 200 mW, and the heat-resistant allowable temperature of the coil group may be less than 120 degrees.

In one embodiment, the material of the lens can be glass, plastic, or glass or plastic coated with a metal film (such as silver-plated or aluminum-plated), and the connector can be made by self-tapping, nuts, heat welding, or glue dispensing. etc. are installed on the lens or lens holder. If the diameter of the fixing hole formed on the lens is too small, the lens will easily crack. If the hole diameter is too large, the screws will easily fail to lock or slip. Therefore, in one embodiment, the fixing holes on the lens may be M1.2 self-tapping screws. hole (hole diameter 0.85-1.1mm), M1.6 self-tapping screw hole (hole diameter 1.2-1.4mm), M1.7 self-tapping screw hole (hole diameter 1.3mm-1.5mm) or M2 self-tapping screw hole (hole diameter 1.5mm- 1.8mm).

The material of the frame can be, for example, metal (aluminum alloy, magnesium alloy, etc.) or plastic without limitation. The material of the magnet can be a hard magnet or a soft magnet without limitation, for example, it can be a neodymium iron boron magnet (NdFeB). Because if the magnet is too large, it will occupy more space, and if the magnet is too small, it will easily have insufficient magnetic force. Therefore, the preferred range of the size of the magnet is 14mm×7mm×5mm-0.5mm×0.5mm×0.5mm, for example, it can be 9mm×1.9mm×0.8 mm, in one embodiment, may be, for example, 9mm×1.9mm×0.3mm. The heat-resistant allowable temperature of the magnet can be less than 120 degrees.

In one embodiment, the natural frequency of the linkage can be adjusted by changing the screw weight, adding mass blocks, setting pressure plates, etc., so that the natural frequency of the linkage can be greater than 90 Hz to avoid resonance phenomena, and a higher natural frequency The reaction speed of the linkage can be improved, and a smaller actuator can be used to allow the linkage to reach a preset rotation angle. Furthermore, the movement pattern can be controlled by locking the pounding force of the connecting piece. In one embodiment, the locking pounding force of the connecting piece can be 0.5-3kg-mm, and a preferred range can be 0.8-2.5kg-mm. , a better range can be 1-2kg-mm.

In one embodiment, at least part of the structure of the optical path adjustment mechanism may be an integrated structure to achieve effects such as reducing the number of parts, simplifying the overall structure, and shortening assembly time. For example, the connecting piece, the lens and the frame can be integrally formed using the same material (such as plastic or metal), or two of the components can be integrally formed first, for example, the connecting piece, the lens, or the connecting piece and the frame can be integrally formed first. It can also be combined with other components after being integrally formed. At this time, the combination can be fixed by dispensing glue or fixing with screws. In another embodiment, the connector, lens, lens holder and frame can be integrally formed using the same material (such as plastic or metal), or at least two of the components can be integrally formed first and then combined with the other components. . In another embodiment, for example, the rotating shaft formed by the connector can be connected to the optical component, the coil can be wound around the periphery of the optical component, and the optical component and the rotating shaft can be integrally formed to form a mechanism for adjusting the optical path. In another embodiment, a mechanism for adjusting the optical path may include an outer frame, a carrying base, a lens provided on the carrying base, a coil wound around the periphery of the carrying base, and a lens provided between the carrying base and the carrying base. There is a control mechanism between the outer frames, and the control mechanism and the bearing base can be integrally formed, or the control mechanism, outer frame and optical components can be integrally formed. In another embodiment, a mechanism for adjusting an optical path includes a frame, a lens holder, a coil set and a transmission component. The lens holder is accommodated in the frame and includes a lens. The coil set is wound around the lens. On the base, the transmission component is connected between the lens holder and the frame, and at least two of the three components of the frame, lens holder and transmission component are integrally formed. Furthermore, shock-absorbing materials such as rubber can be filled between the frame and other internal components to provide a shock-absorbing effect.

In one embodiment, the weight of the optical path adjustment mechanism can be less than 5g, for example, 1.6g, and the volume can be less than 40mm x 40mm x 10mm, for example, 21mm x 21mm x 3.6mm. The driving frequency of the actuating component can be 24Hz-120Hz, and the electromagnetic induction component can be a voice coil motor, for example. The type of the actuating component is not limited, as long as it can achieve the effect of driving the linkage to make it swing back and forth. In another embodiment, as shown in FIG. 10 , the actuating component may include, for example, a piezoelectric component 150 disposed on the lens 112 . By applying an electric field to the piezoelectric component 150 , the piezoelectric component 150 may be compressed or stretched. Deformation means that electrical energy can be converted into mechanical energy to make the lens 112 swing back and forth to achieve the effect of adjusting the optical path.

FIG. 11 is a schematic diagram of an optical path adjustment mechanism applied to an optical system according to an embodiment of the present invention. Referring to FIG. 11 , the optical device 300 includes an illumination system 310 , a digital micromirror device 320 , a projection lens 330 and an optical path adjustment mechanism 340 . Wherein, the illumination system 310 has a light source 312, which is suitable for providing a light beam 314, and the digital micromirror device 320 is arranged on the transmission path of the light beam 314. The digital micromirror device 320 is suitable for converting the light beam 314 into a plurality of sub-images 314a. In addition, the projection lens 330 is disposed on the transmission path of these sub-images 314a, and the digital micromirror device 320 is located between the illumination system 310 and the projection lens 330. In addition, the optical path adjustment mechanism 340 can be disposed between the digital micromirror device 320 and the projection lens 330 , for example, between the digital micromirror device 320 and the internal total reflection prism 319 or between the internal total reflection prism 319 and the projection lens 330 . time, and located on the transmission path of these sub-images 314a. In the above-mentioned optical device 300, the light source 312 may include, for example, a red light-emitting diode 312R, a green light-emitting diode 312G, and a blue light-emitting diode 312B. The colored light emitted by each light-emitting diode is combined by a light combining device 316 to form a light beam 314. 314 will pass through the lens array 317, the lens group 318 and the internal total reflection prism (TIR Prism) 319 in sequence. Thereafter, the internal total reflection prism 319 reflects the light beam 314 to the digital micromirror device 320 . At this time, the digital micromirror device 320 will convert the light beam 314 into a plurality of sub-images 314a, and these sub-images 314a will pass through the internal total reflection prism 319 and the light path adjustment mechanism 340 in sequence, and project these sub-images 314a through the projection lens 330 on screen 350. In this embodiment, when the sub-images 314a pass through the optical path adjustment mechanism 340, the optical path adjustment mechanism 340 changes the transmission paths of part of the sub-images 314a. That is to say, the sub-images 314a passing through the light path adjustment mechanism 340 will be projected at the first position (not shown) on the screen 350, and the sub-images 314a passing through the light path adjustment mechanism 340 will be projected during another part of the time. A second position (not shown) projected on the screen 350, wherein the first position and the second position differ by a fixed distance in the horizontal direction (X-axis) or/and the vertical direction (Z-axis). In this embodiment, since the optical path adjustment mechanism 340 can move the imaging positions of the sub-images 314a by a fixed distance in the horizontal direction or/and the vertical direction, the horizontal resolution or/and the vertical resolution of the image can be improved. Of course, the above embodiments are only examples. The optical path adjustment mechanism of the embodiment of the present invention can be used in different optical systems to obtain different effects, and the location and configuration of the optical path adjustment mechanism in the optical system are not limited at all.

In various embodiments of the present invention, the arrangement of the magnetic bodies is not limited. For example, as shown in FIG. 2 , the coil group 122 (or coil) can surround the optical component or be wound outside the optical component, and two magnetic bodies or magnetic materials such as magnets 124 can be located on both sides of the rotation axis A, respectively. Moreover, the connection line C between the two ends of each magnet 124 can be arranged so that it is not substantially parallel to the rotation axis A, or as shown in FIG. 5 , the connection line C between the two ends of each magnet 224 can be arranged so that it is substantially parallel to the rotation axis A. As shown in FIG. 12A , in another embodiment, the magnet 124 of the optical path adjustment mechanism 100a may include a first section 1241 and a second section 1242 at an angle. The first section 1241 and a second section The segments are connected to each other, and a connection line C at both ends of the magnet 124 may not be substantially parallel to the rotation axis A, that is, the extension line of the connection line C and the extension line of the rotation axis A may intersect at a point. As shown in FIG. 12B , in another embodiment, the magnet 124 of the optical path adjustment mechanism 100b may include a first section 1241 and a second section 1242 at an angle. The first section 1241 and a second section The segments 1242 are separated from each other, the leaf springs 132 and 134 are respectively provided with the linkage 110 and the frame 140, and the connection line D of the two leaf springs 132 and 134 may not be substantially parallel to the connection line C at both ends of the magnet 124, that is, the connection line The extension line of C and line A will intersect at a point. It should be noted that although not shown, the non-parallel arrangement of the magnets 124 in Figures 12A and 12B can also be used with other embodiments of the present invention. For example, if the connecting member adopts a cross-linking member as shown in Figure 4 210, a leaf spring 232, the leaf spring 232 has an annular portion 232e and two extension portions 232f, 232g extending from the annular portion 232e toward both ends of the linking member 210, then the extension direction of each extension portion 232f, 232g can be substantially The connection C between the two ends of each magnet 224 is not parallel. Through the non-parallel arrangement of the magnets in Figures 12A and 12B, the arrangement of the magnetic bodies can be made more flexible. For example, as shown in FIG. 16A , when the magnet 424 is disposed on an edge that is not parallel to the rotation axis A, it can be further away from and avoid optical components such as the light valve module 450 . Therefore, the magnet 424 can be extended to provide a higher magnetic force.

Figure 13 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention. As shown in Figure 13, in this embodiment, the linking member 110 of the optical path adjustment mechanism 100c is provided in the frame 140 and includes a deflectable light ray. The lens 112, the magnet 124 is arranged on the lens 112, for example, it can be arranged on the periphery of the lens 112, the coil group 122 is wound on the frame 140, for example, it can be wound on the periphery of the frame 140, and the coil group 122 surrounds the lens 112, And the magnet 124 is located within the winding range of the coil group. When the linkage 110 is activated, the magnet 124 will swing together with the lens 112 and the coil group 122 remains fixed. Figure 14 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 14 , in this embodiment, the linkage 210 of the optical path adjustment mechanism 200a can be disposed in the frame 240 and can include, for example, a lens 212 and a lens holder 214 for accommodating the lens 212 . The magnet 224 can be disposed On the lens holder 214, for example, it is provided on the periphery of the lens holder 214, and the coil group 222 can be wound around the frame 240, for example, on the periphery of the frame 240. The coil group 222 can be wound around a range, and Magnet 224 is located within the range of the coil assembly. In one embodiment, the linking member 210 can be accommodated in the frame 240. The linking member 210 includes an optical component 212 that can deflect light, a magnetic material or a magnetic body (such as a magnet 224) disposed around the optical component 212. ), and a control mechanism or transmission component (such as the connector 230), the control mechanism or transmission component is provided between the optical component 212 and the frame 240, and the coil or coil group (such as the coil group 222) is wound on the frame 240 and surrounding the optical component 212 . That is, in various embodiments of the present invention, the relative arrangement positions of the magnetic body/magnetic material and the coil/coil group may vary according to actual needs and are not limited. Furthermore, if the magnetic body/magnetic material is disposed on the movable element and the rotational torque increases, the shape, weight, magnetic force, etc. of the magnetic body/magnetic material can be adjusted to make the movement smoother.

Figure 15A is an exploded view of an optical path adjustment mechanism combined with other optical components according to another embodiment of the present invention. Figures 15B and 15C are respectively a side view and a top view of the optical path adjustment mechanism of Figure 15A after assembly. As shown in FIG. 15A , the optical path adjustment mechanism 400 includes a linkage 410 , an actuator component 420 (such as a coil 422 and a magnet 424 ), a connector 430 and a frame 440 . In one embodiment, the material of the frame 440 may be metal or plastic. For example, the optical path adjustment mechanism 400 may be disposed adjacent to the light valve module 450 and the internal total reflection prism 460 . In one embodiment, the total reflection prism can be replaced by a reflective lens, a mirror or a field lens, so the reflective lens assembly mentioned below is represented by the same reference numeral 460 as the total reflection prism. In one embodiment, the light valve module 450 may include, but is not limited to, a light valve, a circuit board, a mechanical component, a protective cover, and a heat sink, and the light valve module 450 may include, for example, a digital micromirror device. In one embodiment, the protective cover of the light valve module includes a light-transmissive lens 452, the linear distance between its surface and the reflective lens 460 is less than 2 mm. In another embodiment, the linear distance between the surface of the light-transmissive lens 452 and the reflective lens 460 is less than 1 mm. In another embodiment, the linear distance between the surface of the light-transmissive lens 452 and the reflective lens 460 is less than 0.6 mm. In this embodiment, a notch 442 may be formed at one end of the frame 440 adjacent to the light valve module 450, and a part of the light valve module 450 may extend into the notch 442. If the frame 440 does not form the gap 442, one end of the frame 440 will interfere with the light valve module 450, preventing the optical path adjustment mechanism 400 from getting closer to the internal total reflection prism 460, resulting in a longer back focus of the lens. Therefore, please refer to FIG. 15A and FIG. 15B at the same time. Through the design of this embodiment, since a gap 442 is formed on one end of the frame 440 facing the light valve module 450, a part of the light valve module 450 can extend into the gap 442, that is, the optical path is adjusted. The mechanism 400 can avoid the light valve module 450 so that the assembled position is closer to the internal total reflection prism (or reflective lens) 460, which can further reduce the overall volume and shorten the back focus of the lens. On the other hand, please refer to FIG. 15A and FIG. 15C at the same time. In this embodiment, the frame 440 can be adjacent to the light valve module 450 (including the light valve of the digital micromirror device 320, for example), and the optical components of the lens 412, for example, can be disposed on In the frame 440, the coil 422 can surround the lens 412. The coil 422 can be, for example, the same as the coil 122a shown in FIG. 7B. The axis can be substantially parallel to the normal direction N of the optical component of the lens 412, and the coil 422 can be wound in multiple turns. outside the optical components. Magnetic material such as the magnet 424 can be disposed adjacent to the coil 422, and one end of the frame 440 can form or be connected to a light-shielding structure such as the light-shielding portion 440d. The light valve in the light valve module 450 can convert an illumination light into an image. Light, for example, the image light when the light valve of the light valve module 450 is in the open state (ONstate) can enter the optical component corresponding to an effective light path of the optical component of the lens 412, and the light valve of the light valve module 450 is in the closed state. The image light in the OFF state will be guided away from the optical components and may illuminate other components such as the coil 422 and the magnet 424, causing the coil 422 or the magnet 424 to heat up and cause a problem of disability. Therefore, the light-shielding structure of the embodiment of the present invention can be provided outside the effective light path of the optical component to avoid blocking the image light that should enter the optical component. Furthermore, the light-shielding structure can be provided in the light path of the image light passing through the coil or magnetic material to provide light blocking. The effect is to reduce or prevent the image light of the light valve or the stray light in the system from irradiating components such as the coil 422 or magnetic materials (such as the magnet 424), and reduce the possibility of the coil 422 or the magnet 424 becoming disabled due to temperature rise, and the light-shielding structure It reduces unnecessary light entering the lens and improves contrast. In one embodiment, the light-shielding structure of the light-shielding portion 440d may be provided independently or may be integrally formed with the frame 440. In one embodiment, the linking member 410 includes a lens 412, and the linear distance between the surface of the lens 412 and the reflective lens 460 is less than 3 mm. In another embodiment, the linear distance between the surface of the lens 412 and the reflective lens 460 is less than 2 mm. In another embodiment, the linear distance between the surface of the lens 412 and the reflective lens 460 is less than 1.5 mm.

Figure 16A is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention. As shown in Figure 16A, the frame 440 of the optical path adjustment mechanism 400a has an upper extension part 440a and a lower extension part 440b at one end adjacent to the light valve module 450, and the upper extension part 440a and the lower extension part 440b define a receiving space. 444. The light valve module 450 can be placed between the upper extension part 440a and the lower extension part 440b, so that the upper and lower sides of the light valve module 450 and the extension parts 440a and 440b form an overlapping relationship. Here, "overlapping" The term "relationship" can be defined as the projection of the light valve module 450 in the horizontal or vertical direction in space can be projected onto at least part of the extension portions 440a, 440b, or the projection of the extension portions 440a, 440b in the space in the horizontal or vertical direction. The projection may be projected onto at least part of the light valve module 450 . In this embodiment, the optical component of the linking member 410 can be disposed in the frame 440 , the coil 422 can be disposed between the frame 440 and the optical component of the linking member 410 , and the frame 440 can carry the internal total reflection prism 460 (The internal total reflection prism 460 is covered by the frame 440 ), so that the assembled position of the optical path adjustment mechanism 400 can be closer to the internal total reflection prism 460 . Figure 16B is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 16B , the extension portion formed at one end of the frame 440 of the optical path adjustment mechanism 400b adjacent to the light valve module 450 can include a lug structure 440c, and the light valve module 450 can be placed into the area surrounded by the lug structure 440c. The opening 446, that is, the lug structure 440c, can form an overlapping relationship with at least two side surfaces of the light valve module 450, so that the assembled position of the optical path adjustment mechanism 400 can be closer to the internal total reflection prism 460. Based on the foregoing embodiments, it can be known that the frame 440 only needs to form a gap or an extension corresponding to the light valve module 450 at one end adjacent to the light valve module 450, and the gap or extension can define a space for accommodating at least part of the light valve module 450. This can achieve the effect of allowing the assembled position of the optical path adjustment mechanism 400 to be closer to the internal total reflection prism 460.

FIG. 17A is an exploded view of an optical path adjustment mechanism combined with other optical components according to another embodiment of the present invention. FIG. 17B is a schematic side view and a top view of the optical path adjustment mechanism of FIG. 17A after assembly. As shown in FIGS. 17A and 17B , the light-shielding structure of the light path adjustment mechanism 400c can be an independent light-shielding sheet 448 , and the light-shielding sheet 448 can be disposed on the frame 440 and other light components (such as the light valve module 450 and the internal total reflection prism 460 ), to avoid problems such as temperature increase or contrast decrease caused by the reflected light of the light valve module 450 in the OFF state or the stray light of the system irradiating other components of the system. 17C is a schematic diagram showing the light shielding plate 448, the light valve module 450 and the internal total reflection prism 460 according to an embodiment of the present invention. As shown in FIG. 17C , since the independent light-shielding sheet 448 is not disposed on the frame 440 or connected to the frame 440 , it has greater design flexibility in the configuration. In one embodiment, the light-shielding sheet 448 The distribution area, the size of the visible light valve module 450, the closed state (OFF state) reflected light, and the main exit and exit locations of system stray light are optimized to further enhance the light shielding effect. In various embodiments of the present invention, the form of the light-shielding structure is not limited at all. For example, it can be a light-shielding part, a light-shielding sheet, a light-shielding piece, etc. without limitation. Furthermore, in one embodiment, at least a portion of the light-shielding structure, such as the light-shielding sheet 448 or the light-shielding portion 440d, can form a superimposed relationship with an internal total reflection prism (or reflective lens) 46.

It should be noted that in the above embodiments, components such as the light valve module and the internal total reflection prism are only examples. For example, the internal total reflection prism can be replaced by a field lens, a reflector or a reflective lens, and when the optical path adjustment mechanism is used in different optical systems or When disposed at different positions of the optical system, the light-shielding structure (such as the light-shielding portion 440d or the light-shielding sheet 448) can also be used to block unnecessary light or stray light generated by different optical components. Furthermore, the material of the light-shielding structure is not limited. For example, it can be plastic or metal. If the light-shielding structure is made of a thermally conductive material such as metal, the light-shielding structure can also be extended to contact the light valve module 450 to provide assistance to the light valve module 450 . Heat dissipation function. In addition, the size and shape of the light-shielding structure can also be adjusted to serve as an aperture between the light valve module 450 and the projection lens (not shown), or can be used as an optical machine upper cover to provide a dust-proof effect.

It should be noted that the individual features mentioned in each embodiment of the present invention are not only applicable to the embodiments in which the feature is illustrated or described, that is, the feature can be applied to various other embodiments of the present invention or other embodiments not illustrated in the description. Examples of variations without limitation. For example, the embodiment of FIG. 15A shows that the frame 440 has a gap 442 and a light-shielding structure 440d, but this is not limiting. The frame 440 with the gap 442 can also be used with a frame that is not connected to the frame 440 as shown in FIG. 17A. Independent sunshade 448. Alternatively, in another embodiment as shown in FIG. 18 , the lens 212 can be disposed on a carrier such as the lens holder 214 through the leaf spring 232 , and two independent and non-connected coil groups 222 can be disposed on the lens holder 214 respectively. Two opposite angular sides.

Although the present invention has been disclosed above in terms of preferred embodiments, they are not intended to limit the present invention. Any person skilled in the art may make some modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention is The protection scope of the invention shall be determined by the claims. In addition, any embodiment or patentable scope of the present invention does not necessarily achieve all the purposes, advantages or features disclosed in the present invention. In addition, the abstract section and title are only used to assist in searching patent documents and are not intended to limit the scope of the invention.

Claims (12)

1. An optical path adjustment mechanism, characterized by comprising: an outer frame; An optical component, including a lens, is located in the outer frame; A light-shielding member is provided between the optical path of the lens and a light valve, and the empty area in the middle of the light-shielding member can expose the lens; and A multi-layer coil is wound around the outer periphery of the lens, and the axial direction of the multi-layer coil is substantially parallel to the optical axis direction of the lens. 2. The optical path adjustment mechanism according to claim 1, characterized in that the optical path adjustment mechanism satisfies one of the following conditions: (1) the light shielding member is connected to the outer frame; (2) all of the optical components are The effective optical path is the optical path through which the image light when the light valve is in the open state is incident on the optical component; (3) the light shielding member is provided on the optical path of the image light when the light valve is in the closed state; (4) ) At least part of the light-shielding member forms a superimposed relationship with an internal total reflection prism or a reflective lens. 3. An optical mechanism, characterized by containing: A light valve can convert an illumination light into an image light; a frame adjacent to the light valve; A lens located in the frame; A multi-layer coil, the axis of the multi-layer coil is parallel to the normal direction of the lens, and the multi-layer coil is substantially stacked along the normal direction and wound around the outside of the lens in multiple turns; a magnetic material located adjacent to the coil; and A light-shielding structure is provided between the light valve and the optical path of the lens. 4. The optical mechanism according to claim 3, wherein the optical mechanism satisfies one of the following conditions: (1) the light-shielding structure is provided on the frame; (2) the light-shielding structure is provided on the outside the optical path of the image light when the light valve is in the open state; (3) the light shielding structure is provided on the optical path of the image light when the light valve is in the closed state; (4) the material of the light shielding structure is plastic or Metal. 5. An optical path adjustment mechanism, characterized by comprising: an outer frame; A lens located in the outer frame; A coil group is wound around the outside of the lens, and the coil group has a plurality of layers of coils stacked substantially along the normal direction of the mirror surface of the lens; and A control mechanism is installed between the lens and the outer frame. 6. The optical path adjustment mechanism of claim 5, wherein the optical path adjustment mechanism satisfies one of the following conditions: (1) the coil group is wound around the periphery of the lens; (2) the lens is located on a on the carrier, and the coil group is wound around the periphery of the carrier; (3) the control component is a spring, a leaf spring, a wire spring, a flexible sheet-like component or a flexible leaf-shaped component; (4) The coil group is wound around a range, and the control mechanism is located outside the winding range. 7. An optical path adjustment mechanism, characterized by comprising: a frame; A magnetic body is provided on the frame; A linking member, including a lens and a lens holder for accommodating the lens, is accommodated in the frame; A coil group that is continuously wound along the thickness direction of the outer periphery of the linking member; and A transmission component is connected between the linking component and the frame. 8. The optical path adjustment mechanism according to claim 7, wherein when the linkage member is driven and rotates in a first rotation direction, the transmission member can exert force to cause the linkage member to rotate in a direction opposite to the first rotation direction. Restoring force of rotation in one direction of rotation. 9. The optical path adjustment mechanism of claim 7, wherein the optical path adjustment mechanism satisfies one of the following conditions: (1) the coil group is wound around the periphery of the lens holder, and the magnetic body includes a magnet or Coil; (2) The magnetic body is located on the four sides of the frame. 10. The optical path adjustment mechanism according to claim 7, characterized in that the optical path adjustment mechanism satisfies one of the following conditions: (1) the transmission component is two leaf springs located at both ends of the linkage member, Each leaf spring overlaps the linkage and the frame respectively, and a connecting direction of the two leaf springs substantially coincides with a rotation axis of the linkage; (2) The transmission component is across the linkage A leaf spring of the component, the leaf spring has an annular portion and two extension portions extending from the annular portion toward both ends of the linking member, and each of the extension portions overlaps the linking member and the frame respectively. 11. An optical path adjustment mechanism, characterized by comprising: A linking member includes an optical component that can deflect light. The optical component can swing to deflect an image light to different positions, and the linking member is provided with a recessed portion in the thickness direction of its peripheral edge; A coil group is wound around the recessed portion of the linkage member and surrounds the optical component; and A transmission component has a first end and a second end that are substantially opposite, the first end is connected to the linking member, the second end is connected to a frame, and the first end and the second end There is at least one bending portion that can produce a height difference. 12. An optical path adjustment mechanism, characterized by comprising: an outer frame; A lens is provided in the outer frame, the outer edge of the lens is provided with a step portion in the thickness direction, and the step portion includes one side wall; A control mechanism is provided between the lens and the outer frame, wherein the contact portion of the control mechanism and the lens forms a first contact point, and the contact portion of the control mechanism and the outer frame A second contact point is formed, and the first contact point and the second contact point have substantially different levels; and A coil is wound around the side wall of the lens step portion.