TWI681247B - Light path adjustment mechanism and fabrication method thereof - Google Patents

Abstract

A light path adjustment mechanism includes a mount, a carrier, a first elastic member, a second elastic member, a first coil, a second coil, a first magnet and a second magnet. The carrier is disposed in the mount and has an optical plate member. Two ends of each of the first elastic member and the second elastic member are respectively connected to the mount and the carrier, and the first elastic member and the second elastic member are disposed on a diagonal line of the carrier. The first coil and the second coil are disposed on the mount, and the first magnet and the second magnet are disposed on the carrier and near the optical plate member.

Description

Optical path adjustment mechanism and manufacturing method

The invention relates to an optical path adjustment mechanism and a manufacturing method thereof.

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

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 a fixing base, a linking member, a first elastic member, a second elastic member, a first coil, a second coil, a first magnetic body, and a first Two magnetic bodies. The linking member is disposed in the fixing base and includes a lens, one end of the first elastic member is connected to the fixing base and the other end is connected to the linking member, one end of the second elastic member is connected to the fixing base and the other end is connected to the linking member, and the first elastic member and the second The elastic member is disposed on a diagonal line of the linking member. The first coil and the second coil are disposed on the fixed base, and the first magnetic body and the second magnetic body are disposed on the linking member and adjacent to the lens.

Another embodiment of the present invention provides an optical path adjustment mechanism, which includes a frame, a linkage, a plurality of control mechanisms, and a plurality of coils. The linking member is accommodated in the frame and contains an optical element which can deflect light and a plurality of magnetic materials arranged around the optical element. A plurality of control mechanisms are provided between the optical element and the frame, and a plurality of coils are provided on the frame and surround the optical element.

Another embodiment of the present invention provides an optical path adjustment mechanism including a frame, a lens, and a coil. The frame forms an extension portion at an end adjacent to a light valve module, and the extension portion and at least two side surfaces of the light valve module form an overlapping relationship. The lens is arranged in the frame, and the coil is arranged between the frame and the lens.

Another embodiment of the present invention provides an optical path adjustment mechanism, including an outer frame, an optical element, and a coil assembly. The outer frame forms a gap at one end adjacent to a light valve module, and a part of the light valve module extends into the gap. The optical element is arranged in the outer frame, and a coil group surrounds the optical element.

Another embodiment of the present invention provides an optical architecture including a light valve module, a reflective lens, and an optical path adjustment mechanism. The light valve module has a light valve and a first lens, and the first lens has 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, and the optical path adjustment mechanism is adjacent to the reflective lens.

With the design of the embodiment of the present invention, because at least part of the structure of the actuating component can be directly arranged on the linking member, the overall volume, weight and number of components of the optical path adjustment mechanism can be greatly reduced, so it is advantageous to miniaturize or thin the optical path adjustment mechanism To match various micro-electronic devices. Furthermore, in the embodiment of the present invention, a notch or an extension may be formed on the end of the frame adjacent to the light valve module corresponding to the light valve module, and the notch or extension may define a space for accommodating at least part of the light valve module, for example Obtain the effect of making the position of the optical path adjustment mechanism closer to the total internal reflection.

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

100‧‧‧Light path adjustment mechanism

110‧‧‧link

112‧‧‧Lens

113‧‧‧Optics

112a, 112b‧‧‧Fixed hole

116‧‧‧Steps

116a‧‧‧Side wall

120‧‧‧actuator

122‧‧‧coil set

122a‧‧‧coil

124‧‧‧Magnet

1241, 1242‧‧‧‧

125‧‧‧Magnetic

127‧‧‧ magnetic material

130‧‧‧Connector

130a‧‧‧Neck

131‧‧‧spindle

132, 134‧‧‧ leaf spring

132a, 132b, 134a, 134b ‧‧‧ fixing hole

132d, 134d

133‧‧‧Control parts

135‧‧‧ Transmission parts

140‧‧‧frame

140a, 140b ‧‧‧ fixing hole

141‧‧‧frame

150‧‧‧ Piezoelectric element

200, 200a‧‧‧ optical path adjustment mechanism

210‧‧‧link

212‧‧‧Lens

214‧‧‧Lens holder

214a, 214b ‧‧‧ fixing hole

215‧‧‧ bearing seat

216‧‧‧recessed part

220‧‧‧Actuating components

222‧‧‧coil set

224‧‧‧Magnet

230‧‧‧Connector

232‧‧‧ Leaf spring

232a, 232b, 232c, 232d ‧‧‧ fixing hole

232e‧‧‧Ring Department

232f, 232g ‧‧‧ Extension

240‧‧‧frame

240a, 240b ‧‧‧ fixing hole

242‧‧‧Outer frame

300‧‧‧Optical device

310‧‧‧ lighting system

312‧‧‧Light source

312R, 312G, 312B ‧‧‧ LED

314‧‧‧beam

314a‧‧‧sub-image

316‧‧‧Combination light device

317‧‧‧light beam

318‧‧‧Lens group

319‧‧‧Internal total reflection

320‧‧‧Digital micromirror device

330‧‧‧Projection lens

340‧‧‧Light path adjustment mechanism

350‧‧‧ screen

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

410‧‧‧ linkage

420‧‧‧Actuating components

422‧‧‧coil set

424‧‧‧Magnet

430‧‧‧Connector

440‧‧‧frame

440a, 440b ‧‧‧ Extension

440c‧‧‧Lub structure

440d

442‧‧‧Notch

444‧‧‧accommodation space

446‧‧‧ opening

448‧‧‧Mask

450‧‧‧Light valve module

452‧‧‧Lens

460‧‧‧Internal total reflection

A‧‧‧rotation axis

A1-A3, B1-B3 ‧‧‧ board

C, D‧‧‧ connection

M‧‧‧Initial position

N‧‧‧Normal direction

P, Q‧‧‧ Direction of rotation

T1, T2‧‧‧contact point

θ‧‧‧angle

W‧‧‧Aspect ratio

X‧‧‧Length

Y‧‧‧Width

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

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

FIG. 3 is a schematic diagram of the actuating state of the link according to an embodiment of the invention.

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

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

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

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 schematic cross-sectional view cut along line A-A' of FIG. 7A.

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 schematic cross-sectional view cut along line B-B' of FIG. 8A.

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

10 is a schematic diagram of an actuating assembly according to another embodiment of the invention.

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

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

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

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

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

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

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

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

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

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

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description with reference to the embodiments of the drawings. The direction words mentioned in the following embodiments, for example: up, down, left, right, front or back, etc., are only for the directions referring to the attached drawings. Therefore, the directional terminology is used to illustrate rather than limit the invention.

The disclosures in the following embodiments disclose an optical path adjustment mechanism, which can be applied to different optical systems (such as display devices, projection devices, etc.) to adjust or change the optical path to provide, for example, improved imaging resolution, improved image quality (elimination of dark Zone, softened image edges) and other effects are not limited, and the installation position and arrangement of the optical path adjustment mechanism in the optical system are not limited at all. The optical path adjustment mechanism may include, for example, a linking member, an actuating assembly, a connecting member, and a frame. In each of the embodiments described below, the linking member may include an optical element that can deflect light, and the linking member may further include a carrier that carries the optical element. The action form of the linking member may be, for example, rotation, vibration, and movement. It is not limited; the actuating component only needs to be able to produce the effect of driving the link, and its constituent components are not limited, for example, it can be an electromagnetic induction component including a magnet and a coil group (or coil); the connecting component can have deformation Later, when the external force is removed, the property can change towards the original size and shape. For example, it can be at least slightly elastic or flexible, and the connection can be various transmission mechanisms that can transmit power, or used to cushion vibration or control motion. The control mechanism is not limited, such as springs, leaf springs, wire springs, flexible sheet-shaped machinery or flexible leaf-shaped machinery, etc.; the frame only needs to be able to define an accommodating space. It is not limited to frames or outer frames with different forms or shapes.

FIG. 1 is an exploded view of components of an optical path adjustment mechanism according to an embodiment of the invention. As shown in FIG. 1, the optical path adjustment mechanism 100 includes a linking element 110, an actuating element 120, a connecting element 130 and a frame 140. In this embodiment, the link 110 includes an optical element that can deflect light, such as a lens 112, and the lens 112 only needs to provide the effect of deflecting light. The form and type are not limited. For example, it can be A lens (Lens) or a mirror (Mirror). In another embodiment, a carrier may also be included, and then the optical element is disposed on the carrier, or both the carrier and the optical element are integrally formed. In this embodiment, the actuating component 120 may be, for example, an electromagnetic induction component including a coil group 122 and a magnet 124. In another embodiment, for example, another coil group may be used as a magnetic body or magnetic material instead of a magnet. Another coil set (not shown) in the frame 140 can also generate electromagnetic force with the coil set wound on the link 110 to drive the link 110. In this embodiment, the connecting member 130 may be, for example, two flat springs 132 and 134 having restoring force. The two ends of the plate spring 132 may have fixing holes 132a, 132b, the two ends of the plate spring 134 may have 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 Fixing holes 140a, 140b. In an assembly embodiment, the link 110 is provided in the frame 140, the magnet 124 can be fixed in the frame 140, the coil assembly 122 can be wound around the lens 112, for example, around the periphery of the lens 112, and the plate spring 132 One end of the lens can be fixed to the lens 112 through fixing holes 132a, 112a corresponding to each other by fixing members such as screws (not shown), and the other end of the plate spring 132 can be fixed to the frame 140 through fixing holes 132b, 140a corresponding to the position , The plate spring 132 is provided between the lens 112 and the frame 140. Furthermore, one end of the plate spring 134 can be fixed to the lens 112 through fixing holes 134a, 112b corresponding to positions by fixing means such as screws (not shown), and the other end of the plate spring 134 can pass through the fixing holes 134b corresponding to positions. 140b 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 FIG. 2. Therefore, the leaf springs 132 and 134 provided at both 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 link 110. The lens 112 can have the rotation axis A as the axis For reciprocating motion, for example, the axis A can be rotated or oscillated clockwise or counterclockwise. As shown in FIG. 3, in one embodiment, the electromagnetic force between the coil group 122 and the magnet 124 allows the lens 112 to rotate an angle θ from the initial position M along the rotation direction P about the rotation axis A, and the plate spring 132, The restoring force of 134 can rotate the lens 112 back to the initial position M in the opposite direction of rotation 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, 134 The lens 112 rotates back to the initial position M in 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, to obtain the effect of adjusting or changing the light path of the light. In an embodiment, the rotation angle θ of the link 110 may range from 0.1-1 degrees, preferably 0.2-0.5 degrees, and may be 0.32 degrees, for example. The optical path adjustment mechanism of the embodiment of the present invention adjusts or changes the optical path to produce different effects according to actual needs. For example, it can be used to improve projection resolution, improve image quality (eliminate dark areas, soften image edges), etc. without limitation.

With the design of the above embodiment, because at least part of the structure of the actuating component (such as the coil group or the coil) is directly disposed on the optical element that can deflect light, it can reduce the overall volume, weight, or number of components of the optical path adjustment mechanism. Therefore, the overall structure can be simplified and the reliability can be improved, and it is advantageous for miniaturization or thinning so as to be compatible with various microelectronic devices.

4 is an exploded view of components of an optical path adjustment mechanism according to another embodiment of the present invention, and 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 210 of the optical path adjustment mechanism 200 may include, for example, a lens 212 and a lens holder 214 that accommodates the lens 212, and the actuating component 220 may include, for example, a coil assembly. For the electromagnetic induction components of 222 and the magnet 224, the coil assembly 222 can be wound around the lens holder 214 and, for example, around the periphery of the lens holder 214, and the magnet 224 can be fixed to the frame 240. The connecting member 230 may be, for example, an integrally formed leaf spring 232 spanning from one end to the other end of the lens holder 214. The shape of the leaf spring 232 is not limited. In this embodiment, the leaf spring 232 has a ring-shaped portion 232e and two extension portions 232f, 232g extending from the ring-shaped portion 232e toward both ends of the link 210, and the two extension portions 232f, The extension direction of 232g can substantially coincide with the rotation axis A. The two ends of the leaf spring 232 may have fixing holes 232a, 232b, 232c, 232d, the two ends of the lens holder 214 may be provided with fixing holes 214a (corresponding to the fixing 232b) and fixing holes 214b (corresponding to the fixing holes 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) may be respectively provided at both ends of the. The fixing member such as a screw (not shown) is fixed through these corresponding fixing holes, and the integrally formed leaf spring 232 can be provided between the lens holder 214 and the frame 240. The extension direction of the leaf spring 232 substantially coincides with the rotation axis A of the link 210. The link 210 (the lens 212 and the lens holder 214) can rotate clockwise or counterclockwise around the axis A, and the restoring force of the leaf spring 232 can link The member 210 rotates back to the initial position in 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 member 210 back in the opposite rotation direction. In the initial position, the linking member 210 can swing back and forth to different positions, so that the lens 212 deflects the incident light to different directions to obtain the effect of adjusting or changing the light path of the light.

With the design of the above embodiment, because at least part of the structure of the actuating component (such as the coil group or the coil) is directly disposed on the lens holder of the linking member, 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 microelectronic devices.

The shape of the connecting member in the embodiment of the present invention is not limited. In an embodiment, the connecting member may have at least one bent portion, that is, one end of the connecting member connecting the linking member and the other end of the connecting frame, both ends The time may include at least one turning point. 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 surfaces sandwiching an angle to form a For a non-planar leaf spring, for example, as shown in FIG. 6A, the plate surface A2 of the plate spring 132 (or the plate spring extension 232f) can be substantially perpendicular (about 90 degrees included) to the plate surface A1 and the plate surface A3, and the plate surface A1 and the plate surface The 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 perpendicular . 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, and the contact portion of the plate spring 132 and the frame body 140 may form a second contact point T2, and the first contact point T1 and the second contact point T2 may have substantially different levels. Furthermore, please refer again to FIG. 1, the plate spring 132 is connected to the connecting portion 132 d of the frame 140, and it can be substantially perpendicular to the plate spring 134 to be connected to the connecting portion 134 d of the frame 140, but it is not limited thereto. In another embodiment, the connecting portion 132d may be substantially parallel to the connecting portion 134d but is not limited. Therefore, in one embodiment, through the non-planar connector design produced by the differently-oriented bending portions at both ends of the connector 130, the center of torsion during the movement of the connector can substantially coincide with the center of mass of the lens 112, but not Defined by this.

In an embodiment, the thickness of the connector 130 may be less than 0.5 mm, for example, the thickness may be 0.1 mm, 0.15 mm, or 0.2 mm, and the material of the connector 130 may be an elastic material (eg, 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 to be easily broken and is too thick, it will cause unsmooth movement. Therefore, the length-to-width ratio W of the neck 130a of the connecting member 130 may range from 0.5-1, a preferred range is 0.6 -0.9, a more preferred range is 0.7-0.8, and may be 0.75, for example. As shown in FIGS. 6A and 6B, the aspect ratio W of the neck 130a can be defined as the length X divided by the width Y (W=X/Y).

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 schematic cross-sectional view cut along line A-A' of FIG. 7A. As shown in FIG. 7A, the optical path adjustment mechanism has a frame 141, and the coil group 122 has a plurality of layers of coils 122a stacked substantially along the normal direction N of the lens 112, for example, to reduce the area occupied by the wiring plane of the coil group 122 , And the coil assembly 122 can be wound around a range, and the transmission mechanism 135 such as the leaf springs 132 and 134 can be located outside the range surrounded by the coil assembly 122, so as to reduce the interlocking member 210 and other Possibility of component interference. As shown in FIG. 7B, the periphery of the lens 112 may form an accommodating structure to accommodate the coil group 122. In this embodiment, a convex portion and a concave portion may be provided in the thickness direction of the periphery of the lens 112 to make the outer edge of the lens 112 In the thickness direction, an L-shaped stepped portion 116 is present, and the coil group 122 can be wound around a side wall 116a of the stepped portion 116 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 schematic 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 magnetic material 127 are substantially at the same horizontal plane, so as to save space occupied by the components, and a periphery of the lens holder 214 may form an accommodating structure to accommodate the coil group 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 face structure, and the coil group 222 can be accommodated in the recess Part 216. That is, the accommodating structure for accommodating the coil group may be a stepped portion or a groove, which may be formed at different positions of the link and may have different shapes such as C-shaped or U-shaped, but is not limited, only It can provide the effect of accommodating the coil group. When the coil assembly is accommodated in the accommodating structure of the linking member, the space occupied by the coil assembly can be saved and the volume of the overall device can be further reduced, and the abrasion contact between the coil assembly and other components can be avoided and the reliability can be improved. Furthermore, the arrangement of the coil accommodating structure on the periphery of the linking member is not limited at all. For example, the coil accommodating structure may be continuously formed on the periphery of the linking member as shown in FIG. 7A or include the periphery of the linking member 210 as shown in FIG. 9 A plurality of concave portions 216 separated from each other.

The connecting pieces of the various embodiments of the present invention are only examples, and the connecting piece provided between the optical element and the frame can be various transmission mechanisms that can transmit power or control mechanisms used to cushion vibration or control movement, without limitation. For example, springs, leaf springs, wire springs, flexible sheet-shaped mechanical parts or flexible leaf-shaped mechanical parts, etc. Furthermore, optical elements such as lenses may be provided on other carriers without being limited to lens holders, and the frame body may be a frame or outer frame of different forms or shapes without limitation.

In an embodiment, the wire diameter of the coil set may be less than 0.2 mm, for example, 0.05 mm, and the manner in which the coil set is fixed to the linking member is not limited. For example, gluing (such as UV dispensing or outer enameled wire glue) may be used. ), hot welding, socket and other methods. Furthermore, in an embodiment, the power of the driving 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 may be glass, plastic, or metal-coated glass, plastic (such as silver or aluminum), and the connecting member may use self-tapping, nut, heat welding, or dispensing Etc. are set on the lens or lens holder. If the fixing hole formed on the lens is too small, the lens is likely to crack, and if the hole diameter is too large, the screw is not easy to lock or slip, so in one embodiment, the fixing hole on the lens may be a M1.2 self-tapping screw Hole (Aperture 0.85-1.1mm), M1.6 self-tapping screw hole (Aperture 1.2-1.4mm), M1.7 self-tapping screw hole (Aperture 1.3mm-1.5mm) or M2 self-tapping screw hole (Aperture 1.5mm- 1.8mm).

The material of the frame body may be metal (aluminum alloy, magnesium alloy, etc.) or plastic, for example, without limitation. The material of the magnet may be a hard magnet or a soft magnet without limitation, and may be a neodymium iron boron magnet (NdFeB), for example. If the magnet is too large, it will increase the occupied space. If the magnet is too small, the magnetic force is likely to be insufficient. Therefore, the preferred size of the magnet is 14mm×7mm×5mm-0.5mm×0.5mm×0.5mm, such as 9mm×1.9mm×0.8 mm, in an embodiment, for example, 9 mm×1.9 mm×0.3 mm. The heat-resistant allowable temperature of the magnet may be less than 120 degrees.

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

In an embodiment, at least a part of the structure of the optical path adjustment mechanism may be an integrated structure to obtain, for example, the effect of reducing the number of parts, simplifying the overall structure, and shortening assembly man-hours. For example, the connector, 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, such as the connector and the lens, or the connector and the frame It can also be combined with other components after being integrally formed. In this case, the combined fixing method may be dispensing or screwing. 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 other components . In another embodiment, as shown in FIG. 3, for example, the rotating shaft 131 formed by a connecting member can be connected to the optical element 113, the coil can be wound around the optical element 113, and the optical element 113 and the rotating shaft 131 can be formed integrally A mechanism for adjusting the optical path. In another embodiment, as shown in FIG. 9, a mechanism for adjusting the optical path may include an outer frame 242, a magnetic body 125, a carrier 215, a lens 212 disposed on the carrier 215, and winding A coil 122a on the periphery of the carrier 215, and a control device 133 disposed between the carrier 215 and the outer frame 242, and the control device 133 and the carrier 215 can be integrally formed, or the control device 133 and the frame The 242 and the optical element 113 can be integrally formed. In another embodiment, a mechanism for adjusting the optical path includes a frame, a lens holder, a coil group, and a transmission mechanism. The lens holder is accommodated in the frame and includes a lens, and the coil group is wound around the lens holder Above, the transmission mechanism is connected between the lens holder and the frame, and at least two of the three elements of the frame, the lens holder and the transmission mechanism are integrally formed. Furthermore, a shock absorber such as rubber may be filled between the frame and other internal members to provide a shock absorption effect.

In an embodiment, the weight of the optical path adjustment mechanism may be less than 5g, for example, 1.6g, and the volume may be less than 40mm x 40mm x 10mm, for example, 21mm x 21mm x 3.6mm. The driving frequency of the actuating component may be 24 Hz-120 Hz, and the electromagnetic induction component may be, for example, a voice coil motor. The type of the actuating assembly is not limited, it only needs to obtain the effect of driving the linking member to swing back and forth. In another embodiment, as shown in FIG. 10, the actuating component may include a piezoelectric element 150 disposed on the lens 112, and the piezoelectric element 150 may be compressed or stretched by applying an electric field on the piezoelectric element 150. Deformation means that the 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.

11 is a schematic diagram of an optical path adjustment mechanism applied to an optical system according to an embodiment of the 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. The illumination system 310 has a light source 312, which is suitable for providing the light beam 314, and the digital micromirror device 320 is disposed 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 paths of the 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 may be disposed between the digital micromirror device 320 and the projection lens 330, for example, may be between the digital micromirror device 320 and the internal total reflection prism 319 or may be internally reflected in the projection prism 319 and the projection Between the lenses 330 and located on the transmission path of these sub-images 314a. In the above 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 light emitted by each light-emitting diode passes through a light combining device 316 After the light is combined, a light beam 314 is formed. The light beam 314 passes through a light integration rod 317, a lens group 318, and an internal total reflection 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 converts the light beam 314 into a plurality of sub-images 314a, and these sub-images 314a will sequentially pass through the internal total reflection prism 319 and the optical path adjustment mechanism 340, and these sub-images 314a through the projection lens 330 Projected on the screen 350. In this embodiment, when these sub-images 314a pass through the optical path adjustment mechanism 340, the optical path adjustment mechanism 340 will change the transmission path of some of these sub-images 314a. That is to say, the sub-images 314a passing through the optical 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 optical path adjustment mechanism 340 during another part of the time will be A second position (not shown) projected on the screen 350, wherein the first position and the second position are different 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 and/or vertical direction, the horizontal resolution and/or vertical resolution of the image can be improved. Of course, the above embodiments are only examples, and the optical path adjustment mechanism of the embodiments of the present invention can be applied to different optical systems to obtain different effects, and the installation position and configuration manner of the optical path adjustment mechanism in the optical system are not limited at all.

In each embodiment of the present invention, the arrangement of the magnetic body is not limited. For example, as shown in FIG. 2, the coil 122 may surround or be wound around the optical element 110, and two magnetic bodies or magnetic materials such as magnets 124 may be located on both sides of the rotation axis A, respectively, and may be configured A line C at each end of each magnet 124 is not substantially parallel to the rotation axis A, or as shown in FIG. 5, a line C at each end of each magnet 224 may be 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 one 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 linking member 110 and the frame body 140, and the connection D of the two leaf springs 132 and 134 may be substantially non-parallel to the connection C at both ends of the magnet 124, that is, the connection C The extension line with line A will intersect at one point. It should be noted that although not shown, the non-parallel configuration of the magnets 124 in FIGS. 12A and 12B can also be combined with other embodiments of the present invention. For example, if the connecting member adopts the cross-linking member 210 as shown in FIG. 4 A leaf spring 232, the leaf spring 232 has a ring-shaped portion 232e and two extended portions 232f, 232g extending from the ring-shaped portion 232e toward both ends of the link 210, then the extending directions of the respective extended portions 232f, 232g may be substantially non-parallel The wires C at both ends of each magnet 224. With the non-parallel arrangement of the magnets of FIGS. 12A and 12B, the arrangement of the magnetic body can be made more flexible. For example, as shown in FIG. 16A, when the magnet 424 is disposed on a side that is not parallel to the rotation axis A, it can be farther away and avoid light elements such as the light valve module 450, so the magnet 424 is extended to provide higher Magnetic force.

13 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the present invention. As shown in FIG. 13, in this embodiment, the link 110 of the optical path adjustment mechanism 100c is disposed in the frame body 140 and includes a deflectable light The lens 112, the magnet 124 is disposed on the lens 112, for example, can be disposed on the periphery of the lens 112, the coil group 122 is wound on the frame 140, for example, can be disposed on the periphery of the frame 140, the coil group 122 surrounds the lens 112, and The magnet 124 is located within the range around which the coil group is wound. When the link 110 is actuated, the magnet 124 will swing with the lens 112 and the coil group 122 remains fixed. 14 is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the invention. As shown in FIG. 14, in this embodiment, the link 210 of the optical path adjustment mechanism 200a may be disposed in the frame 240 and may include, for example, a lens 212 and a lens holder 214 that accommodates the lens 212, and the magnet 224 may be disposed in The lens holder 214 is, for example, arranged on the periphery of the lens holder 214, and the coil group 222 can be wound on the frame 240, for example, on the periphery of the frame 240, the coil group 222 can be wound around a range, and the magnet 224 is located in the range around which the coil group is wound. In one embodiment, the linking member 210 can be accommodated in the frame 240. The linking member 210 includes an optical element 212 that can deflect light, and a magnetic material or magnetic body (such as a magnet 224) disposed around the optical element 212 , And a control mechanism or transmission mechanism (such as the connecting element 230), the control mechanism or transmission mechanism is disposed between the optical element 212 and the frame 240, and the coil or the coil group (such as the coil group 222) is wound around The optical element 212 is surrounded by the frame 240. That is to say, in various embodiments of the present invention, the relative arrangement positions of the magnetic body/magnetic material and the coil/coil group are not limited according to actual needs. Furthermore, if the magnetic body/magnetic material is provided on the movable member to increase the rotation torque, the movement can be made smoother by adjusting the shape, weight, magnetic force, etc. of the magnetic body/magnetic material.

15A is an exploded view of an optical path adjustment mechanism and other optical elements according to another embodiment of the present invention. FIGS. 15B and 15C are a side view and a top schematic view of the optical path adjustment mechanism of FIG. 15A after assembly, respectively. As shown in FIG. 15A, the optical path adjustment mechanism 400 includes a linking member 410, an actuating member 420 (such as a coil assembly 422 and a magnet 424), a connecting member 430, and a frame 440. In an embodiment, the material of the frame 440 may be metal or plastic. The optical path adjustment mechanism 400 can be disposed, for example, at a position adjacent to the light valve module 450 and the internal total reflection lens 460. In one embodiment, the total reflection can be replaced by a reflection lens, a mirror or a field lens. In an embodiment, the light valve module 450 may include, for example, a light valve, a circuit board, a mechanical component, a protective cover, and a heat dissipation element, but is not limited, and the light valve module 450 may include a digital micromirror, for example. Device. In one embodiment, the protective cover of the light valve module includes a transparent lens 452, and the linear distance between the surface and the reflective lens 460 is less than 2 mm. In another embodiment, the linear distance between the surface of the lens 452 and the reflective lens 460 is less than 1 mm. In another embodiment, the linear distance between the surface of the lens 452 and the reflective lens 460 is less than 0.6 mm. In this embodiment, a notch 442 may be formed at an 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 notch 442, one end of the frame 440 may interfere with the light valve module 450, so that the optical path adjustment mechanism 400 cannot be closer to the internal total reflection lens 460, resulting in a longer back focus of the lens. Therefore, please refer to FIGS. 15A and 15B at the same time. With the design of this embodiment, since the frame 440 has a notch 442 formed at the end facing the light valve module 450, a part of the light valve module 450 can extend into the notch 442, that is, The optical path adjustment mechanism 400 can avoid the light valve module 450 to bring the assembled position closer to the internal total reflection 460, which can further reduce the overall volume and shorten the back focus of the lens. On the other hand, please refer to FIGS. 15A and 15C at the same time. In this embodiment, a shielding structure such as a shielding portion 440d can be formed at one end of the frame 440, and the shielding portion 440d formed on the frame 440 can provide a shading effect to avoid The reflected light of the light valve module 450 in the OFF state or the stray light in the system irradiates the coil group 422 and the magnet 424, which causes the temperature rise of the coil group 422 and the magnet 424, which leads to the problem of disability, and the blocking part 440d can reduce unnecessary light entering the lens and improve contrast. Furthermore, the shielding portion 440d can be formed independently and then connected to the frame 440 or integrally formed with the frame 440. In one embodiment, the linking member 410 includes a lens whose linear distance between the surface and the reflective lens 460 is less than 3 mm. In another embodiment, the linear distance between the lens surface and the reflective lens 460 is less than 2 mm. In another embodiment, the linear distance between the lens surface and the reflective lens 460 is less than 1.5 mm.

16A is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the invention. As shown in FIG. 16A, the frame 440 of the optical path adjustment mechanism 400a has an upper extension 440a and a lower extension 440b at an end adjacent to the light valve module 450, and the upper extension 440a and the lower extension 440b define a housing In the space 444, the light valve module 450 can be placed between the upper extension 440a and the lower extension 440b, so that the upper and lower sides of the light valve module 450 and the extensions 440a, 440b form a superimposed relationship. The term "overlapping 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 extensions 440a, 440b, or the extensions 440a, 440b in the space can be horizontal or vertical The projection of the direction can be projected to at least part of the light valve module 450. In this embodiment, the optical element 410 may be disposed in the frame 440, and the coil assembly 422 may be disposed between the frame 440 and the optical element 410. The frame 440 may carry an internal total reflection prism 460 (internal total reflection prism) 460 is covered by the frame body 440), so that the position of the optical path adjustment mechanism 400 after being assembled can be closer to the total internal reflection 460. 16B is a schematic diagram of an optical path adjustment mechanism according to another embodiment of the invention. As shown in FIG. 16B, the extension portion formed by the frame 440 of the optical path adjustment mechanism 400b at one end adjacent to the light valve module 450 may include a lug structure 440c, and the light valve module 450 may be placed into the lug structure 440c. The outgoing opening 446, that is, the lug structure 440 can form an overlapping relationship with at least two sides 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 460. Based on the foregoing embodiments, it can be seen that the frame 440 only needs to form a notch or an extension corresponding to the light valve module 450 at an end adjacent to the light valve module 450, and the notch or extension may define at least a portion of the light valve module 450 Space, the effect of allowing the assembly position of the optical path adjustment mechanism 400 to be closer to the internal total reflection mirror 460 can be obtained.

17A is an exploded view of components of an optical path adjustment mechanism in combination with other optical elements according to another embodiment of the present invention, and FIG. 17B is a schematic side and top view of the optical path adjustment mechanism of FIG. 17A after assembly. As shown in FIGS. 17A and 17B, the shielding structure of the optical path adjustment mechanism 400c may be an independent shielding piece 448, and the shielding piece 448 may be disposed on the frame 440 and other light components (such as the light valve module 450, the internal total reflection prism) Between mirrors 460), to avoid problems such as temperature rise or contrast decrease caused by the reflected light of the light valve module 450 in the OFF state or stray light of the system illuminating other components of the system. FIG. 17C is a schematic diagram showing the blocking sheet 448, the light valve module 450, and the internal total reflection lens 460 according to an embodiment of the present invention. As shown in FIG. 17C, since the independent shielding piece 448 is not limited by the conditions provided on the frame 440, it has greater design flexibility in the configuration. In one embodiment, the distribution area and area of the shielding piece 448 The main reflected positions of the OFF state reflected light and the stray light of the visible light valve module 450 are optimally configured to further enhance the light shielding effect. It should be noted that in the above embodiments, the components such as the light valve module and the internal total reflection lens are only examples. For example, the internal total reflection lens can be replaced by a field lens or a mirror, and when the optical path is adjusted When the mechanism is applied to different optical systems or disposed at different positions of the optical system, the blocking structure (such as the blocking portion 440d or the blocking piece 448) can also be used to block unnecessary light or stray light generated by different light components. Furthermore, the material of the shielding structure is not limited, for example, it can be plastic or metal, and if the shielding structure is made of a thermally conductive material such as metal, the shielding structure can also be extended to contact the light valve module 450 to provide assistance to the light valve mold. Group 450 cooling function. In addition, the shielding structure can also 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 be used as an upper cover of the optical machine to provide a dustproof effect.

It should be noted that the individual features mentioned in the various embodiments of the present invention are not only applicable to the embodiments that illustrate or describe the features, that is, the features can be applied to various other embodiments of the present invention or other specifications not illustrated Examples of changes are not limited. For example, the embodiment of FIG. 15A shows that the frame body 440 has a notch 442 and a shielding structure 440d, but it is not limited, and the frame body 440 with the notch 442 can also be matched with the one not connected to the frame body 440 as shown in FIG. 17A Independent blocking sheet 448. Alternatively, in another embodiment as shown in FIG. 18, the lens 212 can be installed on the carrier such as the lens holder 214 by the leaf spring 232, and the two independent and unconnected coil groups 222 can be respectively arranged on the lens holder 214 Two diagonal sides.

Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Anyone who is familiar with this skill can make some modifications and retouching without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be deemed as defined by the scope of the attached patent application. In addition, any embodiment or scope of patent application of the present invention need not meet all the objectives, advantages or features disclosed by the invention. In addition, the abstract part and title are only used to assist the search of patent documents, not to limit the scope of the present invention.

210‧‧‧link

212‧‧‧Lens

214‧‧‧Lens holder

222‧‧‧coil set

224‧‧‧Magnet

232‧‧‧ Leaf spring

Claims (10)

An optical path adjusting mechanism, comprising: a fixed base; a linking element, which is arranged in the fixed base and contains a lens; a first elastic element, one end is connected to the fixed base, and the other end is connected to the linking element; a second elastic element , One end is connected to the fixing base, and the other end is connected to the linking member, wherein the first elastic member and the second elastic member are disposed at a pair of diagonal lines of the linking member; a first coil and a second coil are disposed at the A fixed base; and a first magnetic body and a second magnetic body, which are disposed on the linking member and adjacent to the lens. The optical path adjusting mechanism as described in Item 1 of the patent application range, wherein the first magnetic body includes a magnet, and the second magnetic body includes a magnet. The optical path adjusting mechanism as described in item 1 of the patent application scope, wherein the lens moves with an axis as the axis, the axis is parallel to the diagonal of the link, and the first and second magnetic bodies are located on the axis respectively On both sides. The optical path adjusting mechanism as described in Item 3 of the patent application range, wherein a connecting line at both ends of the first magnetic body is not substantially parallel to the axis. An optical path adjusting mechanism, comprising: a frame; a linking member accommodated in the frame, the linking member includes an optical element capable of deflecting light and a plurality of magnetic materials arranged around the optical element; a plurality of control mechanisms , Is provided between the optical element and the frame; and a plurality of coils are provided on the frame and surround the optical element. The optical path adjustment mechanism as described in item 5 of the patent application scope, wherein the plurality of control mechanisms are springs, leaf springs, wire springs, flexible sheet-shaped mechanisms or flexible leaf-shaped mechanisms. The optical path adjustment mechanism as described in item 5 of the patent application scope, in which the linking member is When driven and moving in a first direction, at least one of the plurality of control mechanisms applies a restoring force that moves the linking member in the direction opposite to the first direction. The optical path adjustment mechanism as described in item 5 of the patent application scope, wherein the plurality of magnetic materials include hard magnets or soft magnets. The optical path adjustment mechanism as described in item 5 of the patent application, wherein the linking member further includes a carrier, and the optical element and the plurality of magnetic materials are disposed on the carrier. A manufacturing method of an optical path adjusting mechanism, comprising: assembling a lens on a linking member; connecting one end of a first elastic member to the linking member, and connecting the other end to a fixing base; connecting one end of a second elastic member to the linking member The other end is connected to the fixing base, wherein the first elastic member and the second elastic member are disposed on a diagonal line of the linking member; a first coil and a second coil are assembled on the fixing base; and Assemble a first magnetic body and a second magnetic body on the linking member and adjacent to the lens.

Images