CN107884896B

CN107884896B - Optical path adjusting mechanism and optical mechanism

Info

Publication number: CN107884896B
Application number: CN201611257162.9A
Authority: CN
Inventors: 张语宸; 邱汉民; 林维赐; 云麒锥; 林志健
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2016-09-30
Filing date: 2016-12-30
Publication date: 2021-05-18
Anticipated expiration: 2036-12-30
Also published as: CN207366814U; CN206489310U; CN107884898B; CN107884896A; CN107884900A; CN107884898A; CN206489309U; CN107884899B; CN113219615A; CN107884900B; CN117250717A; CN107884897A; CN113219615B; CN109298498A; CN107884899A

Abstract

The embodiment of the invention provides an optical path adjusting mechanism and an optical mechanism. The optical assembly is arranged in the outer frame, the shading piece is arranged outside an effective light path of the optical assembly, and the axis of the coil is parallel to the normal direction of the optical assembly and is wound outside the optical assembly for a plurality of circles. According to the embodiment of the invention, at least part of the structure of the actuating component can be directly arranged on the linkage component, so that the volume, the weight and the number of components of the whole optical path adjusting mechanism can be greatly reduced, and the optical path adjusting mechanism is favorably miniaturized or thinned to match with various miniature electronic devices. The shading structure can be arranged outside an effective light path of the optical component to avoid shading image light which should enter the optical component, and can reduce or avoid the image light of the light valve or stray light in the system from irradiating components such as a coil or a magnetic material and the like, thereby reducing the temperature rise of the coil or a magnet, and the shading structure can reduce unnecessary light from entering the lens and improve the contrast ratio.

Description

Optical path adjusting mechanism and optical mechanism

Technical Field

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

Background

In recent years, various image display technologies have been widely used in daily life. In an image display device, for example, an optical path adjusting mechanism may be disposed to change the traveling optical path of light in the device, so as to provide various effects, such as improving the imaging resolution and improving the image quality. However, the known optical path adjustment mechanism has a large number of components, a large weight, and a large volume, and is difficult to be further miniaturized. Therefore, there is a need for an optical path adjusting mechanism with simple structure, high reliability and greatly reduced weight and volume.

Disclosure of Invention

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

An embodiment of the invention provides an optical path adjusting mechanism, which includes an outer frame, an optical assembly, a light shielding member, and a coil. The optical assembly is arranged in the outer frame, the shading piece is arranged outside an effective light path of the optical assembly, and the axis of the coil is substantially parallel to the normal direction of the optical assembly and is wound outside the optical assembly for a plurality of circles.

An embodiment of the present invention provides an optical path adjusting mechanism, which includes an outer frame, an optical component, a coil assembly and a control mechanism. The optical component is arranged in the outer frame, the coil group is wound outside the optical component and is provided with a plurality of layers of coils which are overlapped along the normal direction of the optical component substantially, and the control part is erected between the optical component and the outer frame. The optical component can be a lens, and the coil assembly is wound on the periphery of the lens. The optical assembly can also be arranged on a carrier, and the coil assembly is wound on the periphery of the carrier. The control member may be a spring, a leaf spring, a wire spring, a flexible sheet member or a flexible leaf member. The coil assembly is wound to a range, and the control mechanism is located outside the winding range.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a magnetic body, a linkage member, a coil assembly and a transmission member. The magnetic body is arranged on the frame, the linkage piece comprises an optical component which is accommodated in the frame and can deflect light rays, when the linkage piece is not driven, the optical component and the magnetic body are substantially positioned on the same horizontal plane, and the coil group is wound on the linkage piece and is connected with the transmission part between the linkage piece and the frame. When the linkage piece is driven and rotates along the first rotation direction, the transmission mechanism applies restoring force which enables the linkage piece to rotate along the direction opposite to the first rotation direction. The optical component can be a lens, the linkage piece comprises a lens and a lens seat for accommodating the lens, the coil group is wound on the periphery of the lens seat, and the magnetic body can comprise a magnet or a coil. The transmission machine part can be two plate springs arranged at two ends of the linkage part, each plate spring is respectively lapped on the linkage part and the frame, and the online directions of the two plate springs can be substantially superposed with the rotating shaft of the linkage part. The transmission part can be a plate spring crossing the linkage part, and the plate spring is provided with a ring-shaped part and two extending parts extending from the ring-shaped part to two ends of the linkage part, and each extending part is respectively lapped with the linkage part and the frame.

An embodiment of the present invention provides an optical path adjusting mechanism, which includes an outer frame, an optical component, a control mechanism, and at least one magnetic body. The optical component is arranged in the outer frame and acts by taking a rotating axis as an axis, the control mechanism is arranged between the optical component and the outer frame, the magnetic body is arranged on the outer frame, two ends of the magnetic body are connected with each other and are not substantially parallel to the rotating axis, when the optical component does not act, the magnetic body and the optical component are substantially positioned on the same horizontal plane, and the coil group is wound outside the optical component.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a linking member, a transmission member, at least one magnetic material, and a coil. The linkage part comprises a lens contained in the frame, two ends of the transmission part are respectively connected between the linkage part and the frame, the magnetic material is arranged on the frame, two ends of the magnetic material are connected with the extension lines and intersect with the two ends of the transmission part, and the coil surrounds the lens. The transmission part can be two plate springs arranged at two ends of the linkage part or a plate spring crossing the linkage part.

An embodiment of the invention provides an optical path adjusting mechanism, which includes an outer frame, a lens, a coil and a control member. The lens is arranged in the outer frame, the control element is arranged between the lens and the outer frame, wherein the control element and the contact part of the lens form a first contact point, the control element and the contact part of the outer frame form a second contact point, and the first contact point and the second contact point have different horizontal heights and are wound on a coil arranged outside the lens.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a linking member, a coil assembly and a transmission member. The linkage part comprises an optical component capable of deflecting light rays, a coil group is wound on the linkage part, and the transmission part is provided with a first end and a second end which are substantially opposite, the first end is connected with the linkage part, the second end is connected with the frame, and at least one turning point is arranged between the first end and the second end. The first end and the second end may each include two faces that are substantially perpendicular to each other.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a lens and a coil. The lens is provided with a step part comprising a side wall in the thickness direction of the outer edge of the lens, and the coil is wound on the side wall of the step part of the lens.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a linking member, a coil assembly and a transmission member. The linkage member includes an optical component capable of deflecting light, a concave portion is disposed along the peripheral thickness direction of the linkage member, a coil assembly is wound around the concave portion of the linkage member and surrounds the optical component, and one end of the transmission member is connected to the linkage member. The coil assembly may have a plurality of layers of coils substantially stacked along a normal direction of the optical assembly, and the linking member may have a plurality of discontinuous concave portions along a peripheral thickness direction thereof.

An embodiment of the invention provides an optical path adjusting mechanism, which includes an outer frame, an optical component, and a coil assembly. 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 arranged in the outer frame, and the coil group surrounds the optical component.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a lens, and a coil. The frame forms an extension part at one end adjacent to the light valve module, the extension part and at least two side surfaces of the light valve module form a superposition relation, the lens can be arranged in the frame, and the coil can be arranged between the frame and the lens. The extending part can comprise a lug structure, the projection of the extending part along the horizontal or vertical direction is projected to at least part of the light valve module, and the frame can cover the total internal reflection prism.

An embodiment of the present invention provides an optical path adjusting mechanism, which includes a light valve module, a reflective lens, and an optical path adjusting mechanism. The light valve module comprises a light valve, a first lens with a first surface, a reflecting lens, a light path adjusting mechanism and an adjacent reflecting lens, wherein the reflecting lens is adjacent to the light valve module, the linear distance between the reflecting lens and the first surface is less than 2mm, and the light path adjusting mechanism is adjacent to the reflecting lens. The light path adjusting mechanism can be provided with a second lens with a second surface, and the linear distance between the second surface and the reflecting lens is less than 3 mm.

An embodiment of the present invention provides an optical path adjusting mechanism, which includes an optical element, a rotating shaft, and a coil. The rotating shaft is connected to the optical assembly, the coil is wound on the periphery of the optical assembly, and the optical assembly and the rotating shaft are integrally formed. The optical component can be a lens, the rotating shaft can be composed of a transmission part or a control part, the coil can be wound out of a range, and the rotating shaft is positioned outside the winding range.

An embodiment of the invention provides an optical path adjusting mechanism, which includes an outer frame, a carrying seat, a lens, a coil and a control member. The lens is arranged on the bearing seat, the coil is wound on the periphery of the bearing seat, the control machine part is arranged between the bearing seat and the outer frame, and the light path adjusting mechanism meets one of the following conditions: (1) the control machine part and the bearing seat are integrally formed; and (2) the control member, the outer frame and the lens are integrally formed. The control member may be a spring, a leaf spring, a wire spring, a flexible sheet member or a flexible leaf member.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a lens holder, a coil assembly and a transmission mechanism. The lens seat is contained in the frame and comprises a lens, the coil group is wound on the lens seat, and the transmission part is connected between the lens seat and the frame, wherein at least two of the three components of the frame, the lens seat and the transmission part are integrally formed. The coil group is wound to form a range, the transmission mechanism can be positioned outside the winding range, the integrally-formed component is made of metal or plastic, and the coil is provided with a plurality of layers of coils which are overlapped along the normal direction of the integrally-formed component.

An embodiment of the invention provides an optical path adjusting mechanism, which includes an outer frame, a linking member, a coil, a driving member, and at least one magnetic member. The linkage piece is arranged in the outer frame and comprises a lens, the coil is wound on the outer frame and surrounds the lens, and the magnetic body is arranged on the linkage piece. The magnetic body includes a magnet and the magnet is set on the lens, the number of at least one magnetic body can be two, the lens uses a rotation axis as axis to move, and two magnetic bodies are respectively positioned on two sides of the rotation axis, the two ends of every magnetic body are connected, and are not parallel to the rotation axis, the coil is coiled into a range, and the magnetic body is positioned in the coil range, and the driving machine member is connected between the linkage member and outer frame.

An embodiment of the invention provides an optical path adjusting mechanism, which includes a frame, a linkage member, and a coil assembly. The linkage piece is arranged in the frame and comprises an optical component capable of deflecting light, a magnetic material arranged around the optical component and a control part, the control part is arranged between the optical component and the frame, and the coil is wound on the frame and surrounds the optical component. The control machine part can be a spring, a plate spring, a wire spring, a flexible sheet machine part or a flexible leaf machine part, when the linkage part is driven and rotates along a first rotating direction, the control machine part can apply restoring force which enables the linkage part to rotate along the direction opposite to the first rotating direction, the linkage part can comprise a bearing seat, and the optical component and the magnetic material are arranged on the bearing seat.

Through the design of the embodiment of the invention, at least part of the structure of the actuating component can be directly arranged on the linkage component, so that the volume, the weight and the number of components of the whole light path adjusting mechanism can be greatly reduced, and the light path adjusting mechanism is beneficial to being miniaturized or thinned to match with various miniature electronic devices. Furthermore, the light shielding structure of the embodiment of the invention can be arranged outside the effective optical path of the optical assembly to avoid shielding the image light which should enter the optical assembly, and can reduce or avoid the image light of the light valve or the stray light in the system from irradiating components such as a coil or a magnetic material and the like, thereby reducing the possibility of incapability caused by the temperature rise of the coil or the magnet, and the light shielding structure can reduce the unnecessary light from entering the lens so as to improve the contrast ratio.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention. In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

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

Fig. 2 is a schematic diagram of the optical path adjusting mechanism of fig. 1 after assembly.

Fig. 3 is a schematic view illustrating an actuation state of a linkage according to an embodiment of the invention.

Fig. 4 is an exploded view of a light path adjustment mechanism according to another embodiment of the present invention.

Fig. 5 is a schematic diagram of the optical path adjusting mechanism of fig. 4 after assembly.

Fig. 6A and 6B are schematic views of a connecting member according to an embodiment of the invention.

FIG. 7A is a schematic view of an optical path adjusting mechanism according to an embodiment of the present invention, and FIG. 7B is a view taken along A-A 'of FIG. 7A'

Enlarged cross-sectional view of the wire-electrode cutting.

Fig. 8A is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention, and fig. 8B is an enlarged cross-sectional view taken along line B-B' of fig. 8A.

Fig. 9 is a schematic view of a coil accommodating structure according to an embodiment of the invention.

FIG. 10 is a schematic view of an actuator assembly according to another embodiment of the invention.

Fig. 11 is a schematic view illustrating an optical path adjusting mechanism applied to an optical system according to an embodiment of the present invention.

Fig. 12A is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention.

Fig. 12B is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the invention.

Fig. 13 is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention.

Fig. 14 is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention.

FIG. 15A is an exploded view of another embodiment of the optical path adjusting mechanism of the present invention with other optical components,

fig. 15B and 15C are schematic side and top views of the optical path adjusting mechanism of fig. 15A with other optical components after assembly.

Fig. 16A is a schematic view of an optical path adjusting mechanism in combination with other optical components according to another embodiment of the invention.

Fig. 16B is a schematic diagram of an optical path adjusting mechanism in combination with other optical components according to another embodiment of the invention.

FIG. 17A is an exploded view of another embodiment of the optical path adjusting mechanism of the present invention with other optical components,

fig. 17B and 17C are schematic side and top views respectively illustrating the optical path adjusting mechanism of fig. 17A and other optical components after assembly.

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

Reference numerals:

100. 100a, 100b, 100c optical path adjusting mechanism

110 linkage piece

112 lens

112a, 112b fixing holes

116 step part

116a side wall

120 actuating assembly

122 coil group

122a coil

124 magnet

1241. 1242 section

130 connecting piece

130a neck part

132. 134 leaf spring

132a, 132b, 134a, 134b fixation holes

132d, 134d connection

140 frame body

140a, 140b fixing holes

150 piezoelectric assembly

200. 200a light path adjusting mechanism

210 linkage piece

212 lens

214 lens seat

214a, 214b fixing holes

216 concave portion

220 actuating assembly

222 coil group

224 magnet

230 connecting piece

232 plate spring

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

232e ring part

232f, 232g extension

240 frame body

240a, 240b fixing holes

300 optical device

310 illumination system

312 light source

312R, 312G, 312B light emitting diode

314 light beam

314a sub-image

316 light-combining device

317 lens array

318 lens group

319 prism for total internal reflection

320 digital micro-mirror device

330 projection lens

340 optical path regulating mechanism

350 Screen

400. 400a, 400b, 400c optical path adjusting mechanism

410 linkage piece

412 lens

420 actuating assembly

422 coil

424 magnet

430 connecting piece

440 frame body

440a, 440b extensions

440c lug structure

440d light shielding part

442 gap

444 accommodation space

446 opening

448 light-shielding sheet

450 light valve module

452 lens

460 total internal reflection prism

A rotating axis

A1-A3, B1-B3 board surface

C. D connecting line

M initial position

N normal direction

P, Q direction of rotation

T1, T2 contact point

Angle theta

W length to width ratio

Length E

Width F

Detailed Description

The foregoing and other technical and scientific aspects, features and advantages of the present invention will be apparent from the following detailed description of the embodiments, which is to be read in connection with the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

The disclosure in the following embodiments discloses an optical path adjusting mechanism that can be applied to different optical systems (e.g., display devices, projection devices, etc.) to adjust or change the optical path to provide effects such as improving the imaging resolution, improving the image quality (eliminating dark areas, softening image edges), etc., without limitation, and the arrangement position and arrangement manner of the optical path adjusting mechanism in the optical system are not limited at all. The optical path adjusting mechanism may include a part or all of a linkage, an actuating component, a connector and a frame, for example. In various embodiments described below, the linkage member may include an optical element capable of deflecting light, and the linkage member may further include a bearing seat for bearing the optical element, and the actuation form of the linkage member may be, for example, rotation, vibration, movement, and the like without limitation; the actuating component only needs to generate the effect of driving the linkage component, and the components thereof are not limited, such as an electromagnetic induction component including a magnet and a coil set (or coil); the connecting piece can have the property of changing towards the direction of recovering the original size and shape when the external force is removed after the deformation, for example, the connecting piece can be at least slightly elastic or flexible, and the connecting piece can be various transmission parts capable of transmitting power or control parts for buffering vibration or controlling movement without limitation, such as a spring, a leaf spring, a wire spring, a flexible sheet part or a flexible leaf part and the like; the frame body only needs to define an accommodating space, and can be a frame or an outer frame with different forms or shapes without limitation.

Fig. 1 is an exploded view of an optical path adjustment mechanism according to an embodiment of the present invention. As shown in fig. 1, the optical path adjusting mechanism 100 includes a link or actuator 110, an actuator 120, a connector 130, and a frame or outer frame 140. In the embodiment, the linkage element 110 includes an optical element capable of deflecting light, such as a Lens 112, and the Lens 112 only needs to provide the effect of deflecting light, and the form and type of the optical element are not limited, such as a Lens (Lens) or a Mirror (Mirror). In another embodiment, the optical module may also include a carrying base, and the optical module is disposed on the carrying base, or the carrying base and the optical module are integrally formed. In the present embodiment, the actuating element 120 may be, for example, an electromagnetic induction element including a coil set 122 and a magnet 124, in another embodiment, for example, another coil set may also be used as a magnetic body or a magnetic material instead of the magnet, and another coil set (not shown) disposed on the frame 140 may also generate electromagnetic force with the coil set wound around the linking element 110 to drive the linking element 110. In the present embodiment, the connecting member 130 can be, for example, two restoring plate springs 132 and 134. The plate spring 132 may have fixing

holes

132a, 132b at both ends thereof, the plate spring 134 may have fixing

holes

134a, 134b at both ends thereof, the lens 112 may have fixing

holes

112a, 112b at both ends thereof, and the frame 140 may have fixing

holes

140a, 140b at both ends thereof. In an assembly embodiment, the linkage element 110 is disposed in the frame 140, the magnet 124 is fixed to the frame 140, the coil 122 is disposed around the lens 112 and around the periphery of the lens 112, one end of the plate spring 132 is fixed to the lens 112 through the corresponding fixing

holes

132a and 112a by a fixing element such as a screw (not shown), and the other end of the plate spring 132 is 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. Further, one end of the plate spring 134 may be fixed to the lens 112 by a fixing member such as a screw (not shown) through the corresponding fixing

holes

134a, 112b, and the other end of the plate spring 134 may be fixed to the frame 140 through the corresponding fixing

holes

134b, 140b, so that the plate spring 134 is provided between the lens 112 and the frame 140. The optical path adjustment mechanism 100 after assembly is shown in fig. 2. Therefore, the

leaf springs

132 and 134 disposed at the two ends of the lens 112 can be connected to the lens 112, and the connection direction of the

leaf springs

132 and 134 can substantially coincide with the rotation axis a of the linkage element 110, and the lens 112 can reciprocate with the rotation axis a as an axis, for example, can rotate or swing clockwise or counterclockwise with the rotation axis a as an axis. As shown in fig. 3, in an embodiment, the electromagnetic force between the coil assembly 122 and the magnet 124 can rotate the lens 112 by an angle θ from the initial position M along the rotation direction P around the rotation axis a, and the restoring force of the

leaf springs

132 and 134 can rotate the lens 112 back to the initial position M along the opposite rotation direction Q; in another embodiment, another electromagnetic force can be applied between the coil assembly 122 and the magnet 124 to assist the restoring force of the plate springs 132, 134 to rotate the mirror 112 back to the initial position M in the opposite rotation direction Q, so that the mirror 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 light path. In one embodiment, the rotation angle θ of the linking element 110 may range from 0.1 to 1 degree, preferably ranges from 0.2 to 0.5 degree, and may be 0.32 degree, for example. The optical path adjusting mechanism of the embodiment of the invention adjusts or changes the optical path, which can produce different effects according to actual requirements, such as being used for improving projection resolution, improving image quality (eliminating dark areas and softening image edges), and the like without limitation, and the setting position and configuration mode of the optical path adjusting mechanism in a device to be used (such as a display device, a projection device, and the like) are also not limited at all. In addition, the electromagnetic induction component of the above embodiment only needs to generate the effect of driving the actuator 110, and the components are not limited, but in another embodiment, for example, another coil set may be used as a magnetic body instead of the magnet, and another coil set disposed in the frame 140 may generate the electromagnetic force with the coil set wound on the actuator 110 to drive the actuator 110. In addition, in various embodiments of the present invention, the actuating element is not limited in its actuating form, and the actuating element may be, for example, a rotating element, a vibrating element, or a linking element. Furthermore, the connecting member only needs to have the property of being able to change in the direction of returning to the original size and shape when the external force is removed after the deformation, for example, the connecting member may have at least slight elasticity or flexibility, and the type of the connecting member is not limited at all. In an embodiment of the invention, the shape of the plate spring is not limited, and referring to fig. 1 again, in an embodiment, the connection portion 132d of the plate spring 132 connected to the frame 140 may be substantially perpendicular to the connection portion 134d of the plate spring 134 connected to the frame 140, but 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 can have two faces that include an angle, and in another embodiment, each

non-planar leaf spring

132 or 134 can have two faces that are substantially perpendicular (about a 90 degree angle) to each other, such that the center of rotation of the

leaf springs

132, 134 during movement can substantially coincide with, but is not limited to, the center of mass of the lens 112.

With the above-mentioned design of the embodiment, at least a part of the structure (e.g. coil set or coil) of the actuating element is directly disposed on the optical element capable of deflecting light, so that the volume, weight or number of components of the whole optical path adjusting mechanism can be reduced, thereby simplifying the whole structure and improving reliability, and facilitating miniaturization or thinning for matching various miniature electronic devices.

Fig. 4 is an exploded view of a light path adjusting mechanism according to another embodiment of the invention, and fig. 5 is a schematic diagram of the light path adjusting mechanism of fig. 4 after assembly. As shown in fig. 4 and fig. 5, in the present embodiment, the linkage or actuator 210 of the light path adjusting mechanism 200 may include, for example, a lens 212 and a lens holder 214 for accommodating the lens 212, the actuator 220 may be, for example, an electromagnetic induction element including a coil set 222 and a magnet 224, the coil set 222 may be wound on the lens holder 214 and may be, for example, wound around a 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 mount 214 to the other. The shape of the plate spring 232 is not limited, in this embodiment, the plate spring 232 has a ring-shaped portion 232e and two extending

portions

232f and 232g extending from the ring-shaped portion 232e to two ends of the linking member 210, and the extending directions of the two extending

portions

232f and 232g substantially coincide with the rotation axis a. The plate spring 232 may have fixing

holes

232a, 232b, 232c, and 232d at two ends thereof, the lens holder 214 may have fixing holes 214a (corresponding to the fixing holes 232b) and 214b (corresponding to the fixing holes 232c) at two ends thereof, and the frame 240 may have fixing holes 240a (corresponding to the fixing holes 232a) and 240b (corresponding to the fixing holes 232d) at two ends thereof. By fixing the lens holder 214 and the frame 240 through the corresponding fixing holes by a fixing member such as a screw (not shown), the plate spring 232 can be provided between the lens holder 214 and the frame 240. The extending direction of the plate spring 232 substantially coincides with the rotation axis a of the linking element 210, the linking element 210 (the lens 212 and 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 linking element 210 back to the initial position along the opposite rotation direction, 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 plate spring 232 to rotate the linking element 210 back to the initial position along the opposite rotation direction, so that the linking element 210 can swing back and forth to different positions, so that the lens 212 deflects the incident light to different directions, thereby obtaining the effect of adjusting or changing the light traveling path.

Through the design of the above embodiment, at least part of the structure (e.g., coil set or coil) of the actuating component is directly disposed on the lens holder of the linking component, so that the volume, weight or number of components of the whole optical path adjusting mechanism can be reduced, and the optical path adjusting mechanism can be miniaturized or thinned to match with various micro electronic devices.

In an embodiment of the invention, the connecting element may have at least one bending portion, that is, the connecting element connects one end of the linking element and the other end of the connecting frame, and the two ends may include at least one turning point therebetween. For example, as shown in fig. 6A and 6B, each leaf spring 132 (or leaf spring extension 232f), leaf spring 134 (or leaf spring extension 232g) may have at least two faces that include an angle to form a non-planar leaf spring, e.g., as shown in fig. 6A, the plate face a2 of the leaf spring 132 (or leaf spring extension 232f) may be substantially perpendicular (about a 90 degree angle) to the plate faces a1 and A3, and the plate faces a1 and A3 may be substantially parallel, and as shown in fig. 6B, the plate face B2 of the leaf spring 134 (or leaf spring extension 232g) may be substantially perpendicular to the plate faces B1 and B3, and the plate face B1 may be substantially perpendicular to the plate face B3. In one embodiment, as shown in fig. 6A, the contact portion of the plate spring 132 and the lens 112 may form a first contact point T1, the contact portion of the plate spring 132 and the frame 140 may form a second contact point T2, and the first contact point T1 and the second contact point T2 may have substantially different horizontal heights. Referring to fig. 1 again, the plate spring 132 is connected to the connecting portion 132d of the frame 140, and the plate spring 134 may be substantially perpendicular to the connecting portion 134d of the frame 140, but is not limited thereto. In another embodiment, the connecting portion 132d may be substantially parallel to the connecting portion 134d but is not limited thereto. Therefore, in an embodiment, the non-planar connection design generated by the bending portions at the two ends of the connection member 130 with different orientations can make the torsional center of the connection member substantially coincide with the center of mass of the lens 112 during the movement, but is not limited thereto.

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

Fig. 7A is a schematic view of an optical path adjusting mechanism according to an embodiment of the invention, and fig. 7B is an enlarged cross-sectional view taken along line a-a' of fig. 7A. As shown in fig. 7A, the coil assembly 122 has a plurality of layers of coils 122a substantially stacked along the normal direction N of the lens 112, for example, to reduce the occupied area of the wiring plane of the coil assembly 122, and the coil assembly 122 can be wound to a certain extent, and the control mechanism or the transmission mechanism, such as the

leaf springs

132 and 134, can be located outside the range wound by the coil assembly 122, so as to reduce the possibility of interference between the linkage 210 and other components during operation. As shown in fig. 7B, a receiving structure may be formed on the periphery of the lens 112 to receive the coil assembly 122, in this embodiment, a convex portion and a concave portion may be disposed in the thickness direction of the periphery of the lens 112, so that the thickness direction of the periphery of the lens 112 presents an L-shaped step portion 116, and the coil assembly 122 may be disposed on a sidewall 116a of the step portion 116 by more than one turn in the thickness direction.

Fig. 8A is a schematic view of an optical path adjusting mechanism according to another embodiment of the invention, and fig. 8B is an enlarged cross-sectional view taken along line B-B' of fig. 8A. As shown in fig. 8B, when the linking member 210 is not actuated, the lens 212 and the magnet 224 are substantially located on the same horizontal plane, so as to save the space occupied by the components, and the periphery of the lens holder 214 can form a receiving structure for receiving the coil assembly 222, in this embodiment, a concave portion 216 is disposed 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 received in the concave portion 216. That is, the accommodating structure for accommodating the coil assembly may be a stepped portion or a groove, may be formed at different positions of the linking member, and may have different shapes such as a C-shape or a U-shape, but not limited thereto, and only needs to provide the effect of accommodating the coil assembly. When the coil assembly is accommodated in the accommodating structure of the linkage piece, the space occupied by the coil assembly can be saved, the volume of the whole device can be further reduced, the abrasion contact between the coil assembly and other components can be avoided, and the reliability is improved. 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 may be continuously formed on the periphery of the linkage as shown in fig. 7A, or include a plurality of recessed portions 216 separated from each other on the periphery of the linkage 210 as shown in fig. 9.

The connecting member of each embodiment of the present invention is only an example, and the connecting member disposed between the optical assembly and the frame can be any kind of driving member capable of transmitting power or a control member for buffering vibration or controlling movement, such as a spring, a leaf spring, a wire spring, a flexible sheet member or a flexible leaf member, without limitation. Furthermore, the optical components, such as lenses, can be disposed on other carriers without limitation to lens holders, and the frame body can be a frame or an outer frame with different forms or shapes without limitation.

In an embodiment, the wire diameter of the coil assembly may be smaller than 0.2mm, for example, 0.05mm, and the manner of fixing the coil assembly on the linkage member is not limited, for example, gluing (for example, UV dispensing or outer layer enameled wire gluing), thermal welding, and sleeving may be adopted. Moreover, in an embodiment, the power of the driving coil assembly may be less than 200mW, and the allowable heat-resistant temperature of the coil assembly may be less than 120 ℃.

In one embodiment, the lens can be made of glass, plastic, or glass coated with metal film, plastic (such as silver-plated or aluminum-plated), and the connecting member can be disposed on the lens or the lens holder by using a self-tapping, a nut, thermal welding, or dispensing method. The lens is easily broken if the diameter of the fixing hole formed on the lens is too small, and the screw is easily locked or slipped if the diameter of the fixing hole is too large, so in one embodiment, the fixing hole on the lens may be an M1.2 self-tapping screw hole (with a diameter of 0.85-1.1mm), an M1.6 self-tapping screw hole (with a diameter of 1.2-1.4mm), an M1.7 self-tapping screw hole (with a diameter of 1.3mm-1.5mm), or an M2 self-tapping screw hole (with a diameter of 1.5mm-1.8 mm).

The material of the frame body is not limited, and may be, for example, metal (aluminum alloy, magnesium alloy, etc.) or plastic. The material of the magnet may be a hard magnet or a soft magnet, but is not limited to this, and may be, for example, neodymium iron boron magnet (NdFeB). Since too large a magnet increases space occupation and too small a magnet tends to lack magnetic force, a preferred range of dimensions for the magnet is 14mm × 7mm × 5mm-0.5mm × 0.5mm × 0.5mm, such as 9mm × 1.9mm × 0.8mm, and in one embodiment, such as 9mm × 1.9mm × 0.3 mm. The allowable heat-resistant temperature of the magnet may be less than 120 degrees.

In one embodiment, the natural frequency of the linkage member can be adjusted by changing the screw balance weight, adding the mass block, arranging the pressing plate and the like, so that the natural frequency of the linkage member can be greater than 90Hz to avoid the resonance phenomenon, the higher natural frequency can improve the reaction speed of the linkage member, and the smaller actuator can enable the linkage member to reach the preset rotation angle. Furthermore, the motion pattern can be controlled by the link weight, and in one embodiment, the link weight can be 0.5-3kg-mm, a preferred range can be 0.8-2.5kg-mm, and a more preferred range can be 1-2 kg-mm.

In one embodiment, at least a portion of the optical path adjusting mechanism may be an integrated structure to achieve the effects of reducing the number of parts, simplifying the overall structure, and shortening the assembling time. For example, the connecting member, the lens and the frame may be integrally formed by using the same material (e.g., plastic or metal), or two of the components may be integrally formed first, for example, the connecting member, the lens or the connecting member, the frame may be integrally formed first and then combined with the other components, and the fixing manner of the combination may be dispensing or screw fixing. In another embodiment, the connecting member, the lens holder and the frame can be integrally formed by using the same material (such as plastic or metal), or at least two of the components can be integrally formed and then combined with the rest of the components. In another embodiment, the rotating shaft formed by the connecting member may be connected to the optical element, the coil may be wound around the periphery of the optical element, and the optical element and the rotating shaft may be integrally formed to constitute a mechanism for adjusting the optical path. In another embodiment, a mechanism for adjusting an optical path may include an outer frame, a carrying seat, a lens disposed on the carrying seat, a coil disposed around the periphery of the carrying seat, and a control member disposed between the carrying seat and the outer frame, wherein the control member and the carrying seat may be integrally formed, or the control member, the outer frame, and the optical element may be integrally formed. In another embodiment, a mechanism for adjusting an optical path includes a frame, a lens holder, a coil assembly and a transmission mechanism, the lens holder is accommodated in the frame and includes a lens, the coil assembly is wound on the lens holder, the transmission mechanism is connected between the lens holder and the frame, and at least two of the three components of the frame, the lens holder and the transmission mechanism are integrally formed. Further, a shock absorbing material such as rubber may be filled between the frame body and other internal members to provide a shock absorbing effect.

In one embodiment, the light path adjusting mechanism may have a weight of less than 5g, such as 1.6g, and a volume of less than 40mmx40mmx10mm, such as 21mmx21mmx3.6 mm. 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 assembly is not limited, and only the effect of driving the linkage member to swing back and forth can be obtained. In another embodiment, as shown in fig. 10, the actuating element may comprise a piezoelectric element 150 disposed on the lens 112, and the piezoelectric element 150 may be compressed or stretched by applying an electric field to the piezoelectric element 150, i.e., electrical energy may be converted into mechanical energy to oscillate the lens 112 back and forth to adjust the optical path.

Fig. 11 is a schematic view illustrating an optical path adjusting 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 dmd 320, a projection lens 330, and an optical path adjusting mechanism 340. The illumination system 310 has a light source 312 adapted to provide a light beam 314, and the dmd 320 is disposed on a transmission path of the light beam 314. The digital micro-mirror device 320 is adapted to convert the light beam 314 into a plurality of sub-images 314 a. In addition, the projection lens 330 is disposed on the transmission path of the sub-images 314a, and the dmd 320 is located between the illumination system 310 and the projection lens 330. In addition, the optical path adjusting mechanism 340 may be disposed between the dmd 320 and the projection lens 330, for example, between the dmd 320 and the tir prism 319, or between the tir prism 319 and the projection lens 330, and located on the transmission path of the sub-image 314 a. 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 color lights emitted by the respective light emitting diodes are combined by a light combining device 316 to form a light beam 314, and the light beam 314 passes through a lens array 317, a lens set 318, and a total internal reflection Prism (TIR Prism)319 in sequence. The tir prism 319 then reflects the light beam 314 to the dmd 320. At this time, the dmd 320 converts the light beam 314 into a plurality of sub-images 314a, and the sub-images 314a sequentially pass through the tir prism 319 and the optical path adjusting mechanism 340, and are projected onto the screen 350 through the projection lens 330. In the present embodiment, when the sub-images 314a pass through the optical path adjusting mechanism 340, the optical path adjusting mechanism 340 changes the transmission paths of part of the sub-images 314 a. That is, the sub-images 314a passing through the optical path adjusting mechanism 340 are projected onto a first position (not shown) on the screen 350, and the sub-images 314a passing through the optical path adjusting mechanism 340 are projected onto a second position (not shown) on the screen 350 within another part of the time, wherein the first position and the second position are different by a fixed distance in a horizontal direction (X axis) or/and a vertical direction (Z axis). In the present embodiment, since the optical path adjusting 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 adjusting mechanism of the embodiments of the present invention can be applied to different optical systems to obtain different effects, and the arrangement position and the configuration manner of the optical path adjusting 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 assembly 122 (or coil) may surround the optical component or be disposed outside the optical component, two magnetic bodies or magnetic materials, such as the magnets 124, may be respectively located at two sides of the rotation axis a, and a line C at two ends of each magnet 124 may be configured to be substantially not parallel to the rotation axis a, or as shown in fig. 5, a line C at two ends of each magnet 224 may be configured to be substantially parallel to the rotation axis a. As shown in fig. 12A, in another embodiment, the magnet 124 of the optical path adjusting mechanism 100a may include a first section 1241 and a second section 1242 that form an angle, the first section 1241 and the second section are connected to each other, and a connection line C between two ends of the magnet 124 may be substantially not parallel to the rotation axis a, that is, an extension line of the connection line C and an 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 adjusting mechanism 100B may include a first section 1241 and a second section 1242 that form an angle, the first section 1241 and the second section 1242 are separated from each other, the

leaf springs

132 and 134 are respectively disposed on the linking member 110 and the frame 140, and a connection line D between the two

leaf springs

132 and 134 may be substantially not parallel to a connection line C between two ends of the magnet 124, that is, the connection line C intersects with an extension line of the connection line a at a point. It should be noted that although not shown, the non-parallel configuration of the magnets 124 of fig. 12A and 12B may also be combined with other embodiments of the present invention, for example, if the connecting element adopts a plate spring 232 crossing the linking element 210 as shown in fig. 4, the plate spring 232 has a ring-shaped portion 232e and two extending

portions

232f and 232g extending from the ring-shaped portion 232e to two ends of the linking element 210, and the extending direction of each extending

portion

232f and 232g may not be substantially parallel to the connecting line C at two ends of each magnet 224. The non-parallel arrangement of the magnets in fig. 12A and 12B can make the arrangement of the magnetic bodies more flexible. For example, as shown in fig. 16A, when the magnet 424 is disposed on the side not parallel to the rotation axis a, it can be far away from and avoid the optical component such as the light valve module 450, so that the magnet 424 is extended to provide a higher magnetic force.

Fig. 13 is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the invention, as shown in fig. 13, in this embodiment, a linkage element 110 of an optical path adjusting mechanism 100c is disposed in a frame 140 and includes a lens 112 capable of deflecting light, a magnet 124 is disposed on the lens 112, for example, may be disposed on a periphery of the lens 112, a coil group 122 is disposed on the frame 140, for example, may be disposed on the periphery of the frame 140, the coil group 122 surrounds the lens 112, and the magnet 124 is located in a range where the coil group is wound, when the linkage element 110 is actuated, the magnet 124 swings together with the lens 112 and the coil group 122 remains fixed. Fig. 14 is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention. As shown in fig. 14, in the present embodiment, the linking member 210 of the optical path adjusting 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, disposed on the periphery of the lens holder 214, the coil assembly 222 can be wound on the frame 240, for example, disposed on the periphery of the frame 240, the coil assembly 222 can be wound within a range, and the magnet 224 is located within the range wound by the coil assembly. In one embodiment, the linkage 210 may be accommodated in the frame 240, and the linkage 210 includes an optical element 212 capable of deflecting light, a magnetic material or magnetic body (e.g., the magnet 224) disposed around the optical element 212, and a control mechanism or a transmission mechanism (e.g., the connection element 230), the control mechanism or the transmission mechanism is disposed between the optical element 212 and the frame 240, and the coil or the coil set (e.g., the coil set 222) is disposed on the frame 240 and surrounds the optical element 212. That is, in various embodiments of the present invention, the relative arrangement position of the magnetic body/magnetic material and the coil/coil assembly is not limited according to the actual requirement. Furthermore, if the magnetic body/magnetic material is provided on the movable element to increase the rotational torque, the movement can be made smoother by adjusting the shape, weight, magnetic force, etc. of the magnetic body/magnetic material.

Fig. 15A is an exploded view of a light path adjusting mechanism of another embodiment of the invention, together with other optical components, and fig. 15B and 15C are schematic side and top views of the light path adjusting mechanism of fig. 15A after assembly, respectively. As shown in fig. 15A, the optical path adjusting mechanism 400 includes a link 410, an actuating element 420 (e.g., coil 422 and magnet 424), a connector 430 and a frame 440. In one embodiment, the frame 440 may be made of metal or plastic. The optical path adjustment mechanism 400 may be disposed, for example, at a position adjacent to the light valve module 450 and the total internal reflection prism 460. In one embodiment, the holophote prism can be replaced by a Mirror, a Mirror (Mirror) or a Field lens (Field lens), and thus the following Mirror assembly is denoted by the same reference numeral 460 as the holophote prism. In one embodiment, the light valve module 450 may include, but is not limited to, a light valve, a circuit board, a component, a protective cover, and a heat sink, and the light valve module 450 may include, for example, a digital micro-mirror device. In one embodiment, the protective cover of the light valve module includes a transparent lens 452, and the linear distance between the surface of the transparent lens 452 and the reflective lens 460 is less than 2 mm. In another embodiment, the straight distance between the surface of the transparent lens 452 and the reflective lens 460 is less than 1 mm. In another embodiment, the linear distance between the surface of the transparent lens 452 and the reflective lens 460 is less than 0.6 mm. In this embodiment, an opening 442 may be formed at an end of the frame 440 adjacent to the light valve module 450, and a portion of the light valve module 450 may extend into the opening 442. If the frame 440 does not form the notch 442, one end of the frame 440 interferes with the light valve module 450, so that the optical path adjusting mechanism 400 cannot be closer to the tir prism 460, resulting in a longer back focus of the lens. Therefore, referring to fig. 15A and fig. 15B, with the design of the present embodiment, since the frame 440 has the notch 442 formed at one end facing the light valve module 450, a portion of the light valve module 450 can extend into the notch 442, that is, the light path adjusting mechanism 400 can avoid the light valve module 450 to make the assembled position closer to the total internal reflection prism (or the reflective lens) 460, so as to further reduce the overall volume and shorten the back focus of the lens. On the other hand, referring to fig. 15A and fig. 15C, in the present embodiment, the frame 440 may be adjacent to the light valve module 450 (including the light valve such as the dmd 320), the optical element such as the lens 412 may be disposed in the frame 440, the coil 422 may surround the lens 412, the coil 422 may be similar to the coil 122a shown in fig. 7B, the axis may be substantially parallel to the normal direction N of the optical element such as the lens 412, and the coil 422 may be disposed outside the optical element for a plurality of turns. For example, the magnetic material of the magnet 424 may be disposed adjacent to the coil 422, and one end of the frame 440 may 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 may convert an illumination light into an image light, for example, the image light of the light valve module 450 in an ON state (ON state) may enter the optical element corresponding to an effective light path of the optical element such as the lens 412, and the image light of the light valve module 450 in an OFF state (OFF state) may be guided away from the optical element and may irradiate other components such as the coil 422 and the magnet 424, which may cause a problem of heating of the coil 422 or the magnet 424 and further cause a failure. Therefore, the light shielding structure of the embodiment of the invention can be disposed outside the effective optical path of the optical assembly to avoid shielding the image light that should enter the optical assembly, and furthermore, the light shielding structure can be disposed on the optical path of the image light passing through the coil or the magnetic material to provide a light shielding effect, thereby reducing or avoiding the image light of the light valve or the stray light in the system from irradiating the coil 422 or the magnetic material (such as the magnet 424) and other components, reducing the possibility of incapability caused by the temperature rise of the coil 422 or the magnet 424, and reducing the unnecessary light entering the lens by the light shielding structure to improve the contrast. In an embodiment, the light shielding structure, such as the light shielding portion 440d, may be disposed independently or formed integrally with the frame 440. In one embodiment, the linkage 410 includes a mirror 412, and a linear distance between a surface of the mirror 412 and the reflective lens 460 is less than 3 mm. In another embodiment, the linear distance between the surface of the mirror 412 and the reflective lens 460 is less than 2 mm. In another embodiment, the linear distance between the surface of the mirror 412 and the reflective lens 460 is less than 1.5 mm.

Fig. 16A is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention. As shown in fig. 16A, the frame 440 of the optical path adjusting mechanism 400a has an upper extending portion 440a and a lower extending portion 440b at an end adjacent to the light valve module 450, and the upper extending portion 440a and the lower extending portion 440b define a receiving space 444, the light valve module 450 can be placed between the upper extending portion 440a and the lower extending portion 440b, such that, for example, the upper and lower two sides of the light valve module 450 and the extending

portions

440a and 440b form an overlapping relationship, where the term "overlapping relationship" can be defined as that the projection of the light valve module 450 in the horizontal or vertical direction in the space can be projected to at least part of the extending

portions

440a and 440b, or the projection of the extending

portions

440a and 440b in the horizontal or vertical direction in the space can be projected to at least part of the light valve module. In this embodiment, the optical components of the linking element 410 may be disposed in the frame 440, the coil 422 may be disposed between the frame 440 and the optical components of the linking element 410, and the frame 440 may carry the tir prism 460 (the tir prism 460 is covered by the frame 440), so that the position of the optical path adjusting mechanism 400 after being assembled may be closer to the tir prism 460. Fig. 16B is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the present invention. As shown in fig. 16B, an extending portion of the frame 440 of the optical path adjusting mechanism 400B formed at an end adjacent to the light valve module 450 may include a protruding lug structure 440c, and the light valve module 450 may be inserted into the opening 446 surrounded by the protruding lug structure 440c, that is, the protruding lug structure 440c may form an overlapping relationship with at least two sides of the light valve module 450, so that the position of the optical path adjusting mechanism 400 after being assembled may be closer to the tir prism 460. Based on the foregoing embodiments, the frame 440 only needs to form a gap or an extension portion at an end close to the light valve module 450 corresponding to the light valve module 450, and the gap or the extension portion can define a space for accommodating at least a portion of the light valve module 450, so that the position of the optical path adjusting mechanism 400 after being assembled can be closer to the tir prism 460.

Fig. 17A is an exploded view of a light path adjusting mechanism and other optical components according to another embodiment of the invention, and fig. 17B is a schematic side view and a schematic top view of the light path adjusting mechanism shown in fig. 17A after assembly. As shown in fig. 17A and 17B, the light shielding structure of the light path adjusting mechanism 400c may be an independent light shielding sheet 448, and the light shielding sheet 448 may be disposed between the frame 440 and other optical members (e.g., the light valve module 450 and the total internal reflection prism 460), so as to avoid the problem of temperature increase or contrast decrease caused by the reflected light of the light valve module 450 in the OFF state (OFF state) or other components of the stray light illumination system of the system. FIG. 17C is a schematic diagram illustrating the light shielding plate 448, the light valve module 450 and the TIR prism 460 according to an embodiment of the invention. As shown in fig. 17C, since the independent light-shielding sheet 448 is not disposed on the frame body 440 or connected to the frame body 440, the configuration has a larger design flexibility, in an embodiment, the distribution area and the area size of the light-shielding sheet 448 can be optimized according to the main position of the light valve module 450 where OFF state (OFF state) reflected light and system stray light exit and exit are generated, so as to further improve the light-shielding effect. In various embodiments of the present invention, the form of the light shielding structure is not limited at all, and for example, the light shielding structure may be a light shielding portion, a light shielding sheet, a light shielding member, and the like without limitation. Furthermore, in an embodiment, at least a portion of the light shielding structure, such as the light shielding sheet 448 or the light shielding portion 440d, can be overlapped with an tir prism (or reflective lens) 46.

It should be noted that in the above embodiments, the components such as the light valve module and the tir prism are only exemplary, for example, the tir prism can be replaced by a field lens, a reflecting mirror or a reflecting lens, and when the optical path adjusting mechanism is applied to different optical systems or disposed at different positions of the optical systems, the light shielding structure (such as the light shielding portion 440d or the light shielding plate 448) can also be used to shield unnecessary light or stray light generated by different optical elements. Furthermore, the light shielding structure is not limited to be made of plastic or metal, and if the light shielding structure is made of a heat conductive material such as metal, the light shielding structure can also extend to contact the light valve module 450 to provide the function of assisting the heat dissipation of the light valve module 450. In addition, the light shielding structure can be adjusted in size and shape to serve as an aperture between the light valve module 450 and the projection lens (not shown), or can serve as a light engine cover to provide a dustproof effect.

It should be noted that the individual features mentioned in the embodiments of the present invention are not only applicable to the embodiments in which they are shown or described, but also to other embodiments of the present invention or other variations not shown in the description. For example, the embodiment of fig. 15A shows that the frame body 440 has a notch 442 and a light shielding structure 440d, but the embodiment is not limited thereto, and the frame body 440 with the notch 442 may also be matched with a separate light shielding sheet 448 that is not connected with the frame body 440 as shown in fig. 17A. Alternatively, in another embodiment as shown in fig. 18, the lens 212 may be disposed on a carrier such as the lens holder 214 through a plate spring 232, and the two independent unconnected coil sets 222 may be disposed on two opposite sides of the lens holder 214 respectively.

Although the present invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Moreover, not all objects, advantages, or features of the disclosure are necessarily to be achieved in any one embodiment or claimed herein. In addition, the abstract and the title of the invention are provided for assisting the search of patent documents and are not intended to limit the scope of the invention.

Claims

1. An optical path adjustment mechanism, comprising:

an outer frame;

the optical assembly is arranged in the outer frame;

a shading piece, which is arranged outside the effective light path of the optical component and is arranged on the light path of the image light when a light valve is in a closed state; and

the axis of the multilayer coil is parallel to the normal direction of the optical assembly, and the multilayer coil is substantially overlapped along the normal direction and wound outside the optical assembly for a plurality of times.

2. The optical path adjusting mechanism of claim 1, wherein the light shielding member is connected to the outer frame.

3. The optical path adjusting mechanism of claim 1, wherein the effective optical path of the optical element is an optical path of an image light incident to the optical element when a light valve is in an open state.

4. The optical path adjusting mechanism according to claim 1, wherein at least a portion of the light shielding member is in a superimposed relationship with a total internal reflection prism or a reflective lens.

5. An optical mechanism, comprising:

a light valve for converting an illumination light into an image light;

a frame adjacent to the light valve;

a lens, arranged in the frame;

the axis of the multilayer coil is parallel to the normal direction of the lens, and the multilayer coil is substantially overlapped along the normal direction and wound outside the lens for a plurality of times;

the magnetic material is arranged close to the coil; and

and the shading structure is arranged on a light path of the image light passing through the coil or the magnetic material.

6. The optical mechanism of claim 5, wherein said light blocking structure is disposed on said frame.

7. The optical mechanism as claimed in claim 5, wherein the light shielding structure is disposed outside the optical path of the image light when the light valve is in the open state.

8. The optical mechanism as claimed in claim 5, wherein said light shielding structure is disposed on the optical path of the image light when the light valve is in the closed state.

9. The optical mechanism as claimed in claim 5, wherein the light shielding structure is made of plastic or metal.