CN115826177A

CN115826177A - Light path adjusting mechanism

Info

Publication number: CN115826177A
Application number: CN202310020088.2A
Authority: CN
Inventors: 林维赐
Original assignee: Young Optics Inc
Current assignee: Young Optics Inc
Priority date: 2018-12-18
Filing date: 2018-12-18
Publication date: 2023-03-21
Also published as: CN111338044A; CN111338044B

Abstract

The invention provides an optical path adjusting mechanism, which comprises a frame, a bearing seat, an optical element and a plurality of actuators. The bearing seat is arranged on the frame and is connected with the frame through the first elastic piece and the second elastic piece, the outer periphery of the bearing seat is connected with the first elastic piece to form a first connection area and a second connection area, and the outer periphery of the bearing seat is connected with the second elastic piece to form a third connection area and a fourth connection area. The first, second, third and fourth connecting regions respectively define first, second, third and fourth intermediate regions therebetween. The plurality of actuators are disposed in at least two and at most three of the first, second, third and fourth intermediate zones.

Description

Light path adjusting mechanism

The application is a divisional application of a patent application with the application date of 2018, 12 and 18 months and the application number of 201811555301.5, and the name of the invention is 'light path adjusting mechanism and manufacturing method thereof'.

Technical Field

The present invention relates to an optical path adjusting 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 adjusting 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.

The background section is provided to facilitate an understanding of the present disclosure, and thus, the disclosure in the background section may include certain well-known techniques that do not constitute a part of the common general knowledge of those skilled in the art. The statements in the "background" section do not necessarily represent the contents or problems to be solved by one or more embodiments of the present invention, as these statements and drawings represent the best modes of practicing the present invention and are not to be considered in any way limiting.

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.

According to one aspect of the present invention, an optical path adjusting mechanism includes a frame, a holder, an optical element, and a plurality of actuators. The bearing seat is arranged on the frame and is connected with the frame through the first elastic piece and the second elastic piece, the outer periphery of the bearing seat is connected with the first elastic piece to form a first connection area and a second connection area, and the outer periphery of the bearing seat is connected with the second elastic piece to form a third connection area and a fourth connection area. The first connection area and the second connection area define a first intermediate area therebetween, the second connection area and the third connection area define a second intermediate area therebetween, the third connection area and the fourth connection area define a third intermediate area therebetween, and the fourth connection area and the first connection area define a fourth intermediate area therebetween. The optical element is arranged on the bearing seat, and the plurality of actuators are arranged in at least two and at most three of the first, second, third and fourth middle areas.

According to another aspect of the present invention, an optical path adjusting mechanism is provided, which includes a frame, a holder, an optical element, and a plurality of actuators. The bearing seat is arranged on the frame and is connected with the frame through the first elastic piece and the second elastic piece, the bearing seat comprises a first side and a second side which are opposite, and a third side and a fourth side which are opposite, and the third side and the fourth side are respectively positioned between the first side and the second side. The optical element is arranged on the bearing seat and swings in the first axial direction and the second axial direction, and the at least one actuator is positioned on at least one of the first side, the second side, the third side and the fourth side. The first elastic piece is connected with the frame through the first fixing point, the bearing seat is connected with the first elastic piece through a first connecting point and a second connecting point on the outer periphery of the bearing seat, and a connecting line of the first fixing point and the first connecting point is not parallel to the first axial direction and not parallel to the second axial direction.

According to the above aspects of the present invention, the optical path adjusting mechanism adjusts or changes the optical path, so as to generate different effects according to actual requirements, such as increasing the projection resolution, improving the image quality (eliminating dark areas, softening image edges), and the like without limitation. Moreover, by utilizing the principle that the acting force of the actuator is matched with the elastic restoring force of the elastic piece to generate reciprocating swing, the optical element can generate the motion of swinging to four different inclined positions in two different axial directions only by arranging two actuators at two sides close to the bearing seat, and the effects of reducing the number of parts, simplifying the whole structure and shortening the assembly working hours are achieved.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly understood, the present invention may be implemented in accordance with the content of the description, and in order to make the above and other objects, features, and advantages of the present invention more clearly understood, the following preferred embodiments are specifically described below with reference to the accompanying drawings.

Drawings

Fig. 1 is a schematic diagram of an optical path adjusting mechanism according to an embodiment of the present invention.

FIGS. 2A-2C are graphs showing the overall force distribution of the load-bearing seat when the actuator is activated.

FIG. 3 is a diagram illustrating an image shift effect of pixels according to an embodiment of the invention.

Fig. 4 is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the present invention.

Fig. 5A-5D are schematic diagrams of various shapes of elastic members.

Fig. 6A to 6D are schematic diagrams showing various modifications of the optical path adjusting mechanism.

Fig. 7A is a schematic view of an optical path adjusting mechanism according to another embodiment of the present invention.

Fig. 7B is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the invention.

Fig. 7C is a schematic diagram of an optical path adjusting mechanism according to another embodiment of the present invention.

FIG. 8 is a schematic view of an actuator according to an embodiment of the invention.

Fig. 9A and 9B are schematic views of an actuator according to another embodiment of the invention.

FIG. 10 is a schematic view of an actuator according to another embodiment of the present 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. 12 is a schematic view illustrating an optical path adjusting mechanism applied to an optical system according to another embodiment of the present invention.

Detailed Description

The foregoing and other technical and other features and advantages of the invention will be apparent from the following detailed description of the embodiments, taken in conjunction 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 used is intended to be illustrative and is not intended to be 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.

Fig. 1 is a schematic diagram of an optical path adjusting mechanism according to an embodiment of the present invention. As shown in fig. 1, the optical path adjusting mechanism 100 may have a frame (base) 110, a carrier (carrier) 120, an optical element 130, and a plurality of actuators 140. The supporting base 120 is disposed on the frame 110 and connected to the frame 110 by a first elastic member 150 and a second elastic member 160. In one embodiment, the carrier 120 may be, for example, a carrier or a lens holder that is independent or integrated with the optical element 130; in another embodiment, an area capable of carrying the optical element 130 may directly extend from the first elastic element 150 or/and the second elastic element 160 to serve as the carrying seat 120, but the invention is not limited thereto. In the present embodiment, the susceptor 120 includes a first side 122 and a second side 124 opposite to each other, and a third side 126 and a fourth side 128 opposite to each other, and the third side 126 and the fourth side 128 are respectively located between the first side 122 and the second side 124, i.e., the distance between the first side 122 and the second side 124 can be greater than the distance between the first side 122 and the third side 126. The optical element 130 may be disposed on the carrier 120, and the optical element 130 may be, for example, a Lens, and the Lens only needs to provide the effect of reflecting or refracting light, and the form and type of the Lens are not limited, and may be, for example, a Lens (Lens) or a Mirror (Mirror). The plurality of actuators 140 may be a first actuator 142 and a second actuator 144, the first actuator 142 is disposed on the first side 122 of the susceptor 120, and the second actuator 144 is disposed on the third side 126 adjacent to the first side 122, in the present embodiment, the first actuator 142 may be disposed on the frame 110 and located on the first side 122, the second actuator 144 may be disposed on the frame 110 and located on the third side 126, and the first actuator 142 and the second actuator 144 may be disposed on the same side of a diagonal line of the susceptor 120. Furthermore, in the present embodiment, the first elastic member 150 may include a fixed portion 152 and two movable portions 154 connected to two ends of the fixed portion 152 and capable of swinging or twisting, the second elastic member 160 includes a fixed portion 162 and two movable portions 164 connected to two ends of the fixed portion 162 and capable of swinging or twisting freely, and the

fixed portions

152 and 162 may be respectively connected and fixed to the frame 110 by a fixing member such as a screw or a bolt. In the present embodiment, each of the

movable portions

154 and 164 can be disposed at a diagonal position of the carrying seat 120, and each of the

movable portions

154 and 164 can include at least one turning portion B and can have, for example, two different sections (e.g., a section parallel to the X-axis direction and a section parallel to the Y-axis direction of fig. 1) substantially parallel to two adjacent sides of the carrying seat 120. Furthermore, in the embodiment, the outer periphery 120a of the supporting base 120 is connected to the first elastic member 150 to form a first connecting area C1 and a second connecting area C2, and the outer periphery 120a of the supporting base 120 is connected to the second elastic member 160 to form a third connecting area C3 and a fourth connecting area C4, the first connecting area C1 and the second connecting area C2 define a first middle area M1 therebetween, the second connecting area C2 and the third connecting area C3 define a second middle area M2 therebetween, the third connecting area C3 and the fourth connecting area C4 define a third middle area M3 therebetween, and the fourth connecting area C4 and the first connecting area C1 define a fourth middle area M4 therebetween. In the embodiment, the middle areas M1-M4 are overlapped with the outer periphery 120a of the susceptor 120, and the first actuator 142 and the second actuator 144 are respectively disposed in the first middle area M1 and the fourth middle area M4. In another embodiment, in addition to the first actuator 142 and the second actuator 144, an actuator 140 may be disposed in the second middle region M2 or the third middle region M3.

When the first actuator 142 is activated, the first actuator 142 can apply a force F1 to the first side 122 of the carrier 120, and when the second actuator 144 is activated, the second actuator 144 can apply a force F2 to the third side 126 of the carrier 120. For example, the first actuator 142 may apply a downward pressing force F1 to the first side 122 of the carrier, so that the carrier 120 is tilted downward toward the first side 122, and at this time, the elastic member 150 or/and the elastic member 160 generates a reverse elastic restoring force to force the carrier 120 to return to the original position, so that the interaction between the force F1 and the reverse restoring force of the first elastic member 150 or/and the second elastic member 160 can swing the first side 122 of the carrier 120 upward and downward, so that the optical element 130 disposed on the carrier 120 can swing to different tilted positions in the X-axis direction; similarly, the second actuator 144 can apply a downward pressing force F2 to the third side 126 of the carrier, so that the carrier 120 is tilted downward toward the third side 126, and the first elastic member 150 or/and the second elastic member 160 can generate a reverse elastic restoring force to force the carrier 120 to return to the original position, so that the interaction between the force F2 and the reverse restoring force of the first elastic member 150 or/and the second elastic member 160 can swing the third side 126 of the carrier 120 upward and downward, so that the optical element 130 disposed on the carrier 120 can swing to different tilted positions in the Y-axis direction. In another embodiment, the

actuators

142 and 144 can apply a pushing force to the susceptor 120, and the effect of swinging the optical element 130 can also be obtained. Fig. 2A, fig. 2B and fig. 2C show the overall stress distribution of the load bearing seat when the actuators are activated, wherein fig. 2A shows the stress distribution of the load bearing seat activated by only the first actuator, fig. 2B shows the stress distribution of the load bearing seat activated by only the second actuator, and fig. 2C shows the stress distribution of the load bearing seat activated by both the first actuator and the second actuator. Because the susceptor 120 is tilted toward the position with the largest stress, the stress distribution of the susceptor in fig. 2A-2C shows the corresponding swing mode, and when the optical element 130 disposed on the susceptor 120 can swing rapidly in two different axes to generate four different tilted positions relative to the frame 110 by, for example, the actuation of only the first actuator 142, the simultaneous actuation of the first actuator 142 and the second actuator 144, and the alternate transformation of different control modes of only the second actuator 144, a pixel image originally incident on the optical element 130 can be deflected by the optical element 130 with the rapid transformation of four different tilted positions to generate the four pixel images P, Q, R, S shown in fig. 3, thereby obtaining the effect of, for example, increasing the pixel resolution to 4 times.

The optical path adjusting mechanism of the embodiment of the invention adjusts or changes the optical path, which can generate different effects according to actual requirements, such as increasing the projection resolution, improving the image quality (eliminating dark areas, softening image edges), and the like without limitation. Furthermore, by using the principle that the acting force of the actuator is matched with the elastic restoring force of the elastic member to generate periodic swinging, only two actuators need to be arranged on two sides (or in the first middle area M1 and the fourth middle area M4 of fig. 1) close to the bearing seat, so that the optical element can swing to four different inclined positions in two different axial directions, and the effects of reducing the number of parts, simplifying the overall structure and shortening the assembly time are achieved. Furthermore, the elastic member is designed to have a plurality of sections extending in different directions (e.g., two different extending sections substantially parallel to two adjacent sides of the supporting base), which can provide an effect of reducing the swing resistance, for example.

Fig. 4 shows a schematic diagram of an optical path adjusting mechanism 100a according to another embodiment of the present invention. As shown in fig. 4, a first elastic member 150 and a second elastic member 160 are disposed on opposite sides of the optical element 130, the first actuator 142 is disposed at a position where the first elastic member 150 is overlapped, and the second actuator 144 is disposed at one side of the optical element 130 and located between the first elastic member 150 and the second elastic member 160 (without overlapping any elastic member), so that a distance from the first actuator 142 to the first elastic member 150 is smaller than a distance from the second actuator 144 to the first elastic member 150. By alternating the different control modes, such as only the first actuator 142, the first actuator 142 and the second actuator 144, and only the first actuator 142, the optical element 130 can also rapidly swing in two different axial directions to generate four different tilting positions relative to the frame 110. In the present embodiment, the first elastic element 150 and the second elastic element 160 both have two different sections parallel to two adjacent sides of the optical element 130, and the section distribution manner of the elastic elements in fig. 4 is different from that in fig. 1. That is, according to the design of the embodiments of the present invention, the shape, size, elastic modulus or distribution of the segments of the elastic member is not limited, but only needs to obtain the effect of generating four different inclined positions in two different axial directions, for example, fig. 5A to 5D show various elastic members with different shapes, which can be selected or changed as required to generate the required inclined position or swing amplitude.

Fig. 6A to 6D are schematic diagrams showing various modifications of the optical path adjusting mechanism. According to various embodiments of the present invention, the shape of the holder 120 (or the optical element 130) of the optical path adjusting mechanism is not limited, and may be, for example, rectangular (fig. 6D), circular (fig. 6C) or hexagonal (fig. 6A and 6B), and the number of the actuators 140 may be, for example, two (fig. 6A, 6B and 6C) or three (fig. 6D). Furthermore, the two actuators 140 can be distributed on two adjacent sides (fig. 6A) or two non-adjacent but close sides (fig. 6B), and only need to be distributed on two opposite sides of the supporting base 120 at different times to obtain two different axial swinging effects. In addition, the number and distribution of the elastic elements are not limited, and may be distributed only on two opposite sides of the carrier 120 (the

elastic elements

150 and 160 shown in fig. 6A), three adjacent sides (the

elastic elements

150, 160 and 170 shown in fig. 6C), or four sides of the carrier (the

elastic elements

150, 160, 170 and 180 shown in fig. 6D).

In one embodiment, the frame 110, the carrying base 120, the first elastic member 150 and the second elastic member 160 can be integrally formed by using the same material (e.g., magnetic material), or two of the components can be integrally formed first and then combined with the other components, or three of the components can be integrally formed first and then combined with the other components. For example, the frame 110 may be integrally formed with the first elastic member 150 and the second elastic member 160 using the same material, or the frame 110 may be integrally formed with the first elastic member 150 using the same material, without limitation. The arrangement of the first elastic member 150 and the second elastic member 160 is not limited at all. As shown in fig. 1, the first elastic member 150 and the second elastic member 160 can be connected to each other in an extending manner, and the connected portions can form a ring-shaped rectangular carrier 120. In another embodiment, as shown in fig. 7A, the first elastic element 150 and the second elastic element 160 may be two separate members respectively disposed on two opposite sides of the susceptor 120. Furthermore, when the first elastic element 150 and the second elastic element 160 are respectively disposed on two opposite sides of the carrying seat 120, the two movable portions 154 of the first elastic element 150 or the two movable portions 154 of the second elastic element 160 can be connected to each other (fig. 7A) or separated from each other (fig. 7B), i.e., the arrangement positions and the actuation manners of the

elastic elements

150 and 160 of fig. 7A and 7B relative to the carrying seat 120 are the same, and the difference is only that the two movable portions on the same side are designed to be connected to or separated from each other. In addition, if the optical device is a lens, the middle portion of the holder 120 may form an opening corresponding to the effective area of the lens as shown in fig. 7A to allow light to pass through, and if the optical device is a mirror, the holder 120 may not need to form an opening as shown in fig. 7C because the light is reflected by the optical device 130. Furthermore, as shown in fig. 7C, if the optical element is a mirror, the light will deviate after being reflected and will not pass through the optical element, so that at least one other structure of the actuator 140 can be retracted to the back side of the susceptor 120 (overlapping the light reflection region of the optical element) without affecting the light path, thereby obtaining the effect of further reducing the overall volume.

Referring to fig. 7C, in an embodiment, the carrier 120 may be connected to the frame 110 through a first flexible member 150a and a second flexible member 160a, the first flexible member 150a and the second flexible member 160a are located at two opposite sides of the carrier 120, the first flexible member 150a may be connected to the frame 110 through a first fixing point FP1, and the second flexible member 160a may be connected to the frame 110 through a second fixing point FP 2. The susceptor 120 is connected to the first flexible member 150a through a first connection point CP1 and a second connection point CP2 on the outer periphery, and the susceptor 120 is connected to the second flexible member 160a through a third connection point CP3 and a fourth connection point CP4 on the outer periphery. The optical element 130 is disposed on the carrier 120 and can swing in a first axial direction (e.g., X-axis direction) and a second axial direction (e.g., Y-axis direction), and the first connection point CP1 and the second connection point CP2 can be located on two sides of the first axial direction (e.g., X-axis direction). In this embodiment, a distance D between the first fixing point FP1 of the first flexible member 150a and the first connection point CP1 in the first axial direction (e.g., the X-axis direction) is smaller than a total length of the first flexible member 150a from the first connection point CP1 to a reference point BP. The reference point BP is defined as an intersection point of a virtual line extending from the first fixed point FP1 in parallel with the second axial direction (e.g., Y-axis direction) and a virtual line extending from the first connection point CP1 in parallel with the first axial direction (e.g., X-axis direction), and the total length is the sum of the lengths of all sections of the first flexible part 150a from the first connection point CP1 to the reference point BP. As shown in fig. 7C, the total length of the first flexible part 150a from the first connection point CP1 to a reference point BP is the sum of the lengths of the section L1, the section L2, the section L3, the section L4 and the section L5. In addition, in the embodiment, a connection line CL between the first fixing point FP1 and the first connection point CP1 of the carrier 120 is not parallel to the first axial direction (e.g., the X-axis direction) and the second axial direction (e.g., the Y-axis direction). In addition, in the case that the same flexible element or elastic element is connected to the frame via a plurality of fixing points, as shown in fig. 7B, for example, the elastic element 150 can be connected to the frame 110 via two fixing points FP1, FP1', and the first fixing point of the first connecting point CP1 relative to the first flexible element 150a is the fixing point (i.e. the fixing point FP 1) closest to the first connecting point CP 1.

Furthermore, the structure and operation of the actuator 140 of the above embodiments are not limited at all, and only the optical element needs to be tilted and swung by the force. For example, in one embodiment, the lens holder, the carrier, or the extension of the elastic member provided with the carrier 120 for carrying the optical element 130 may be made of magnetic material, and the actuator 140 may include a coil 146 or an electromagnet 148 as shown in fig. 8, so that when the coil 146 or the electromagnet 148 is energized, an attractive force may be generated to attract the carrier, and one end of the optical element 130 is pressed down to generate a swing motion. In another embodiment, as shown in fig. 9A and 9B, a lens holder, a carrier, or an extension of an elastic member provided with a carrier 120 for carrying the optical element 130 may be made of a non-magnetic material, and the actuator 140 may include a permanent magnet 172 disposed on the carrier 120 and an electromagnet 148 disposed under the carrier 120 corresponding to the permanent magnet 172. As shown in fig. 9A, the permanent magnet 172 is disposed on the carrier 120, for example, the left side is an S pole and the right side is an N pole, the left side of the electromagnet 148 is an N pole and the right side is an S pole, and the permanent magnet 172 can be attracted to press down one end of the optical element 130; as shown in fig. 9B, when the electromagnets 148 exchange the direction and magnetic polarity of the current I, the left side of the electromagnet 148 is S-pole and the right side is N-pole, which can repel the permanent magnet 172 to lift up one end of the optical element 130, so that the optical element 130 can generate periodic oscillation by the alternate change, and the present embodiment can obtain greater oscillating motion by using the actuation manner of attraction and repulsion. In another embodiment, as shown in fig. 10, a piezoelectric element 190 may also be used, and an electric field is applied to the piezoelectric element 190 to generate a compression or tension deformation of the piezoelectric element 190, i.e. the electric energy is converted into mechanical energy to make the optical element 130 swing back and forth to achieve the effect of adjusting 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 400 includes an illumination system 310, a light valve 320, a projection lens 260, and an optical path adjusting mechanism 100. The illumination system 310 has a light source 312 adapted to provide a light beam 314, and a light valve 320 disposed on a transmission path of the light beam 314. The light valve 320 is adapted to convert the light beam 314 into a plurality of sub-images 314a. In addition, the projection lens 260 is disposed on the transmission path of the sub-images 314a, and the light valve 320 is located between the illumination system 310 and the projection lens 260. In addition, the optical path adjusting mechanism 100 may be disposed between the light valve 320 and the projection lens 260 or within the projection lens 260, for example, between the light valve 320 and the tir prism 319 or between the tir prism 319 and the projection lens 260, and located on the transmission path of the sub-images 314a. In the above-mentioned optical device 400, 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, 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 sequentially passes through a fly-eye lens array (fly-eye lens array) 317, an optical element group 318, and a total internal reflection Prism (TIR Prism) 319. The tir prism 319 then reflects the beam 314 to the light valve 320. At this time, the light valve 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 100, and are projected onto the screen 350 through the projection lens 260. In the present embodiment, when the sub-images 314a pass through the optical path adjusting mechanism 100, the optical path adjusting mechanism 100 changes the transmission paths of part of the sub-images 314a. That is, the sub-images 314a passing through the optical path adjusting mechanism 100 are projected onto a first position (not shown) on the screen 350, and the sub-images 314a passing through the optical path adjusting mechanism 100 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 the horizontal direction or/and the vertical direction. In the present embodiment, since the optical path adjusting mechanism 100 can move the imaging position 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. For example, as shown in fig. 12, the optical path adjustment mechanism 100 may be provided in the projection lens 260 of the optical device 410.

The term "optical element" as used herein means an element made of a material that is partially or completely reflective or transmissive, and typically comprises glass or plastic. For example, the optical element may be a lens, a total reflection Prism (TIR Prism), a total reverse reflection Prism set (RTIR Prism), various integrators, various filters, and the like.

The term Light valve 320 is widely used in the projection industry, and most of the industry refers to individual optical elements in a Spatial Light Modulator (SLM). So-called spatial light modulators contain a number of individual cells (individual optical cells) which are spatially arranged in a one-or two-dimensional array. Each unit can be independently controlled by optical signals or electric signals, and various physical effects (such as Pockels effect, kerr effect, acousto-optic effect, magneto-optic effect, electro-optic effect of semiconductor, or photorefractive effect) are utilized to change the optical characteristics of the unit, so that the illumination light beams illuminated on the independent units are modulated, and image light beams are output. The independent unit can be an optical element such as a micro-mirror or a liquid crystal unit. That is, the light valve may be a Digital Micro-mirror Device (DMD), a Liquid Crystal On Silicon (LCOS) Panel, or a transmissive liquid crystal Panel.

In the Projector industry, projectors are generally classified into Cathode Ray Tube (Cathode Ray Tube) projectors, liquid Crystal Display (LCD) projectors, digital Light Projectors (DLP) and Liquid Crystal On Silicon (LCOS) projectors according to the difference in Light valves used therein, and the projectors belong to a transmissive Projector because Light passes through an LCD panel as a Light valve when the projectors are operated, while projectors using Light valves such as LCOS and DLP projectors are developed based on the principle of Light reflection and are called reflective projectors. In the present embodiment, the projector is a digital light projector, and the light valve 320 is a Digital Micromirror Device (DMD).

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. An optical path adjusting mechanism, comprising:

a frame;

the bearing seat is arranged on the frame and is connected with the frame through a first elastic piece and a second elastic piece, the outer periphery of the bearing seat is connected with the first elastic piece to form a first connecting area and a second connecting area, the outer periphery of the bearing seat is connected with the second elastic piece to form a third connecting area and a fourth connecting area, the first connecting area and the second connecting area define a first middle area between the first connecting area and the second connecting area, the second connecting area and the third connecting area define a second middle area between the second connecting area and the third connecting area, the third connecting area and the fourth connecting area define a third middle area between the third connecting area and the fourth connecting area, and the fourth connecting area and the first connecting area define a fourth middle area between the fourth connecting area and the first connecting area;

the optical element is arranged on the bearing seat; and

a plurality of actuators disposed in at least two and at most three of the first, second, third, and fourth intermediate regions.

2. An optical path adjustment mechanism, comprising:

a frame;

the bearing seat is arranged on the frame and is connected with the frame through a first elastic piece and a second elastic piece, the bearing seat comprises a first side and a second side which are opposite, and a third side and a fourth side which are opposite, and the third side and the fourth side are respectively positioned between the first side and the second side;

the optical element is arranged on the bearing seat and swings in a first axial direction and a second axial direction; and

at least one actuator located on at least one of the first side, the second side, the third side, and the fourth side, wherein the first elastic element is connected to the frame via a first fixing point, the carrier is connected to the first elastic element via a first connection point and a second connection point on the outer periphery of the carrier, and a connection line between the first fixing point and the first connection point is not parallel to the first axis and not parallel to the second axis.

3. The optical path adjustment mechanism of claim 2, wherein the first elastic member is disposed on the first side and the second elastic member is disposed on the second side.

4. The optical path adjustment mechanism according to claim 1 or 2, wherein at least one actuator is provided at a position overlapping the first elastic member.

5. The optical path adjustment mechanism according to claim 1 or 2, wherein each of the elastic members includes a first section and a second section extending in different directions.

6. The optical path adjustment mechanism according to claim 1 or 2, wherein the optical element includes a reflective sheet or a lens.

7. The optical path adjustment mechanism according to claim 1, wherein a distance from one of the plurality of actuators to the first elastic member is smaller than a distance from another of the plurality of actuators to the first elastic member.

8. The optical path adjustment mechanism according to claim 1, wherein two of the plurality of actuators are located on the same side of a diagonal of the carrier.

9. An optical path adjustment mechanism, comprising:

a frame;

a carrier base disposed on the frame and connected to the frame by a first flexible member and a second flexible member, the first flexible member and the second flexible member being located at opposite sides of the carrier base, the first flexible member being connected to the frame via a first fixing point, the second flexible member being connected to the frame via a second fixing point, the carrier base being connected to the first flexible member via a first connection point and a second connection point on an outer periphery thereof, and the carrier base being connected to the second flexible member via a third connection point and a fourth connection point on the outer periphery thereof; and

the optical element is arranged on the bearing seat and can swing in at least one of a first axial direction and a second axial direction, the first connecting point and the second connecting point are located on two sides of the first axial direction, the distance between the first fixed point and the first connecting point in the first axial direction is smaller than the total length of the first flexible piece from the first connecting point to a reference point, the reference point is the intersection point of a virtual line of the first fixed point extending in parallel with the second axial direction and a virtual line of the first connecting point extending in parallel with the first axial direction, and the total length is the total length of all sections of the first flexible piece from the first connecting point to the reference point.

10. The optical path adjustment mechanism according to claim 9, wherein the optical element includes a reflective sheet or a lens.