Speckle eliminating mechanism

Abstract

The speckle eliminating mechanism comprises a bearing seat, a dodging assembly, an outer frame, a first elastic part and a first actuator. The dodging assembly is provided with a light receiving surface and is arranged on the bearing seat. The outer frame is arranged adjacent to the bearing seat. And the first elastic part is the only part for connecting the bearing seat and the outer frame. The first actuator comprises a first part and a second part which act relatively, and the first part is arranged on the bearing seat. The first actuator can drive the dodging assembly, and the connection position of the first elastic machine part and the outer frame serves as a fulcrum, so that the dodging assembly swings in the plane direction parallel to or the same as the light receiving face of the dodging assembly. The speckle eliminating mechanism can simplify the structure, and is convenient to assemble, position and adjust the vibration path and direction of the moving part.

Description

Technical Field

[0001] The present disclosure relates to optical mechanisms, and more particularly, to speckle reduction mechanisms. Background Art

[0002] This section provides background information related to the present disclosure which is not necessarily prior art.

[0003] In the illumination and light combining system architecture of a laser projector, the speckle effect of the laser light source will cause light spots to appear on the screen. In the prior art, a diffuser is used in the illumination and light combining system. In order to achieve a better speckle elimination effect, the prior art makes the diffuser vibrate or rotate to achieve the effect of eliminating speckle.

[0004] One prior art uses a wheel-shaped diffuser (Diffuser Wheel), which is rotated by a motor to achieve the effect of dispersing speckles. However, this structure is relatively large in size, and the motor produces relatively loud noise.

[0005] Chinese patent number CN112764297A discloses a dynamic diffuser assembly, including an upper moving part, a lower fixed part, four elastic support members and four groups of magnet coil groups, with a complex structure and difficult positioning. It is not easy to adjust the vibration path and direction of the moving part. U.S. Patent No. US20160306183 discloses an optical component for reducing speckle noise, disclosing three or four elastic components with complex structures and three or four groups of magnet coil groups. Chinese patent number CN113641061B discloses a beam speckle elimination device, including four relatively complex springs and two groups of magnet coil groups, which still does not solve the problems of difficult positioning and difficult adjustment of the vibration path and direction of the moving part.

[0006] Chinese patent CN215264354U discloses a speckle elimination device, which includes eight springs and four sets of magnetic coils. In order to solve the problem that the horizontally arranged springs are difficult to maintain positioning in the vertical direction, an arc-shaped protrusion is also arranged under the mounting seat to avoid positioning deviation in the vertical direction. Summary of the invention

[0007] In order to solve the above-mentioned problems of the prior art, the purpose of the present disclosure is to provide a speckle elimination mechanism, which can effectively solve the problems of the prior art such as complex structure, difficult positioning, and difficulty in adjusting the vibration path and direction of the moving part.

[0008] In order to achieve the above-mentioned purpose, the present disclosure provides a speckle elimination mechanism, comprising: a supporting seat, a light homogenizing component, an external frame, a first elastic component, and a first actuator. The light homogenizing component is provided with a light receiving surface and is disposed on the supporting seat. The external frame is disposed in a position adjacent to the supporting seat. The first elastic component is the only component connecting the supporting seat and the external frame. The first actuator comprises a first part and a second part that act relative to each other, and the first part is disposed on the supporting seat. The first actuator can drive the light homogenizing component, with the connection position between the first elastic component and the external frame as a fulcrum, so that the light homogenizing component swings in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component.

[0009] The present disclosure also provides a speckle elimination mechanism, comprising: a supporting seat, an external frame, a first flexible mechanism, and a first actuator. The supporting seat includes a light homogenizing component, and the light homogenizing component is provided with a light receiving surface. The external frame is arranged outside the supporting seat. The first flexible mechanism is the main mechanism connecting the supporting seat and the external frame. The first actuator includes a first part and a second part that are relatively actuated, and the first part is arranged on the supporting seat. The first actuator can drive the light homogenizing component by the first part and the second part that are relatively actuated, so that the light homogenizing component can swing with the connection position of the first flexible mechanism and the external frame as a fulcrum to maintain the light receiving surface facing the same direction continuously.

[0010] The present disclosure also provides a speckle elimination mechanism, comprising: a supporting seat, an external frame, a first flexible mechanism, and a first actuator. The supporting seat includes a light homogenizing component and the light homogenizing component is provided with a light receiving surface. The external frame is arranged outside the supporting seat. The first flexible mechanism connects the supporting seat and the external frame. The first actuator is connected to the supporting seat or the external frame. The first actuator can drive the light homogenizing component so that the light homogenizing component can swing with the connection position between the first flexible mechanism and the external frame as a fulcrum to maintain the light receiving surface of the light homogenizing component continuously facing the same direction.

[0011] Compared with the prior art, the speckle elimination mechanism disclosed in the present invention provides the first flexible mechanism as the only mechanism connecting the supporting base and the external frame, and uses the first actuator to drive the light homogenizing component to swing in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component with the connection position between the first flexible mechanism and the external frame as a fulcrum. This can simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving part, and effectively avoid the problems in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The foregoing and other advantages of the present disclosure will become immediately apparent to those skilled in the art from the following detailed description, particularly when reference is made to the drawings described herein.

[0013] Figure 1A A schematic diagram showing a three-dimensional structure of a speckle elimination mechanism according to an embodiment of the present disclosure;

[0014] Figure 1B A schematic diagram showing a top view of a speckle elimination mechanism according to an embodiment of the present disclosure;

[0015] Figure 2A A schematic diagram showing the swinging mode of the light homogenizing component according to an embodiment of the present disclosure;

[0016] Figure 2B A schematic diagram showing the swinging mode of the light homogenizing component according to another embodiment of the present disclosure;

[0017] Figure 3 Display according to Figure 1B Schematic diagram of the cross-sectional three-dimensional structure along line AA';

[0018] Figure 4A A schematic diagram showing a three-dimensional structure of a speckle elimination mechanism according to another embodiment of the present disclosure;

[0019] Figure 4B A schematic diagram showing a top view of a speckle elimination mechanism according to another embodiment of the present disclosure;

[0020] Figure 5 Display according to Figure 4B Schematic diagram of the cross-sectional three-dimensional structure along line BB';

[0021] Figure 6 A schematic diagram showing a swinging mode of a speckle elimination mechanism according to an embodiment of the present disclosure;

[0022] Figure 7 A top view schematically shows a speckle elimination mechanism according to another embodiment of the present disclosure;

[0023] Figure 8 A top view schematically shows a speckle elimination mechanism according to yet another embodiment of the present disclosure. DETAILED DESCRIPTION

[0024] To make the above and other objects, features, and advantages of the present disclosure more apparent and understandable, the preferred embodiments of the present disclosure will be specifically described below in conjunction with the accompanying drawings as follows. Furthermore, the directional terms mentioned in the present disclosure, such as up, down, top, bottom, front, back, left, right, inside, outside, side layer, surrounding, center, horizontal, lateral, vertical, longitudinal, axial, radial, the uppermost layer or the lowermost layer, etc., are only references to the directions of the attached drawings. Therefore, the directional terms used are for explaining and understanding the present disclosure, rather than for limiting the present disclosure. In the drawings, units with similar structures are denoted by the same reference numerals.

[0025] Referring to Figures 1A to 3 , the present disclosure provides a speckle elimination mechanism 100, including: a carrier 10, an outer frame 20, a first flexible member 30, and a first actuator 40. The carrier 10 includes a light homogenizing component 11, and the light homogenizing component 11 is provided with a light receiving surface RS. The outer frame 20 is disposed outside the carrier 10. The first flexible member 30 connects the carrier 10 and the outer frame 20 and is the main member. The first actuator 40 includes a first part 41 and a second part 42 that act relatively, and the first part 41 is disposed on the carrier 10. The first actuator 40 can drive the light homogenizing component 11 by the relatively acting first part and second part, so that the light homogenizing component 11 can swing with the connection position between the first flexible member 30 and the outer frame 20 as a fulcrum AP1 to maintain the light receiving surface RS facing the same direction continuously.

[0026] Specifically, the carrier 10 is a frame for carrying and fixing the light homogenizing component 11. The light homogenizing component 11 is disposed on the carrier 10. The carrier 10 is, for example, a "return" - shaped hollow frame to surround the light homogenizing component 11. In another preferred embodiment, the carrier 10 surrounds at least two sides of the light homogenizing component 11, and in other preferred embodiments, it surrounds three sides or four sides of the light homogenizing component 11. The carrier 10 can also be used for locking one end of the first flexible member 30 and providing locking for the first part 41 of the first actuator 40.

[0027] Specifically, the outer frame 20 is disposed on the outer side of the support base 10 adjacent to the support base 10, for example, disposed on at least one side of the support base 10 and spaced apart from the support base 10 by a distance, so that when the support base 10 is pushed by the first actuator 40 to cause the light homogenizing component 11 to swing, there is a swingable space near the support base 10. The outer frame 20 is used to lock the other end of the first flexible mechanism 30 so that the support base 10 can swing through the first flexible mechanism 30. The outer frame 20 also provides locking for the second part 42 of the first actuator 40 so that the first part 41 and the second part 42 of the first actuator 40 are arranged relative to each other. In one embodiment, the outer frame 20 can be used to fix the light homogenizing component 11 at an appropriate position in the optical engine. In one embodiment, the outer frame 20 can be integrated with the frame of the optical engine, and the present disclosure does not limit this.

[0028] Specifically, the light homogenizing component 11 swings along the circumferential direction CD1 between radial directions RD1 and RD2 of the axis AX1. In one embodiment, when the first actuator 40 pushes the light homogenizing component 11, the swing frequency of the light homogenizing component 11 is adjusted by controlling the vibration frequency of the first actuator 40.

[0029] Specifically, depending on the type and size of the optical machine and the severity of the speckle, the vibration frequency of the first actuator 40 disclosed herein is preferably greater than 0 Hz and less than 400 Hz, or a higher vibration frequency; the swing angle or amplitude of the light homogenizing component 11 is preferably greater than 0 degree and less than 10 degrees, or a higher swing angle; the displacement of the light homogenizing component 11 is preferably greater than 0 mm and less than 5 mm, or a higher displacement, so as to effectively eliminate the speckle.

[0030] Specifically, the light homogenizing component 11 is used to eliminate speckle of the laser light source. The light homogenizing component is configured to allow the laser light source to irradiate the light receiving surface RS of the light homogenizing component and reflect back to the light path. In one embodiment of the present disclosure, the light homogenizing component 11 is a diffuser. Specifically, the light homogenizing component 11 can also be a microlens array, a light diffusion component, or a reflective component with a microstructure surface.

[0031] Specifically, the first flexible mechanism 30 is used to provide a flexible connection function. A flexible connection is relative to a rigid connection. In a rigid connection, there is no displacement between the relative connecting parts. A flexible connection, on the other hand, allows displacement between the connecting parts, such as pivoting or connecting with elastic materials. In a preferred embodiment, in addition to allowing the light homogenizing component 11 to swing with the connection position between the first flexible mechanism 30 and the external frame 20 as a fulcrum AP1, the first flexible mechanism 30 is also used to maintain the light receiving surface RS facing the same direction. That is, the first flexible mechanism 30 can provide a first degree of freedom, allowing the light homogenizing component 11 to swing in a planar direction parallel to or the same as that of the light receiving surface RS of the light homogenizing component 11. For example, the first flexible mechanism 30 is a first pivot located at the fulcrum AP1 and perpendicular to the light receiving surface RS.

[0032] In another embodiment of the present disclosure, the first flexible member 30 is an elastic material, such as a first elastic member. Specifically, the first elastic member can also be used to provide an elastic restoring force for the reciprocating swing of the light homogenizing component 11. In one embodiment of the present disclosure, the first elastic member is a plate spring. One end of the plate spring is fixed to the bearing seat 10, and the other end is fixed to the outer frame 20. The plate spring can be a plate-shaped structure of "I" or "Z", and the "I" structure in the middle of the letter is simpler than the existing structure.

[0033] In one embodiment of the present disclosure, the first flexible mechanism 30 is connected to the bearing seat and the outer frame in the following manner: the first flexible mechanism 30 is the main mechanism connecting the bearing seat 10 and the outer frame 20. Specifically, in order to simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving parts, and effectively avoid the problems in the prior art, the first flexible mechanism 30 is responsible for the main task of connecting the bearing seat 10 and the outer frame 20, but the provision of other components that assist the first flexible mechanism 30, such as an outer cover, a guide groove or a guide rod, etc., is not excluded. In another embodiment of the present disclosure, the first flexible mechanism 30 is a first elastic mechanism, which is the only mechanism connecting the bearing seat 10 and the outer frame 20.

[0034] The setting of the fixed points of the first actuator 40 and the first flexible mechanism 30 disclosed in the present invention can achieve "the light homogenizing component 11 swings in a plane direction parallel to or the same as the light receiving surface RS of the light homogenizing component 11", and it is not easy to cause up and down swinging. Specifically, when the speckle elimination mechanism 100 is in operation, the fulcrum AP1 is a fixed rotation point, and the actuator 40 can be regarded as a dynamic support point when powered on. Under the restriction of at least two fulcrums, the present invention can achieve the purpose of swinging the light homogenizing component 11 in the direction parallel to the light receiving surface RS by controlling the vibration frequency, swing angle and displacement.

[0035] Specifically, the first actuator 40 is used to push the light homogenizing component to swing. In one embodiment of the present disclosure, the first actuator 40 corresponds to the first part 41 and the second part 42, such as a magnet and a coil that can be interchanged. The magnet and the coil are a set of actuators that can be controlled to apply force to push the support base 10 to swing or make the support base 10 swing through a first elastic member, such as a leaf spring.

[0036] In another embodiment of the present disclosure, the first actuator 40 corresponds to the first part 41 and the second part 42, such as a corresponding and interchangeable magnetic component and electromagnet. The magnetic component and the electromagnet are a set of actuators that can be controlled to apply force to push the support base 10 to swing or make the support base 10 swing through a first elastic member, such as a leaf spring.

[0037] Specifically, the first actuator 40 of the speckle elimination mechanism 100, for example, provides the light homogenizing component 11 with a swing in a first degree of freedom. In addition, the light homogenizing component 11 can also swing in a second degree of freedom. FIG. 4A to FIG. 6 The speckle elimination mechanism 100' described in one embodiment of the present disclosure further includes a base 50, a second flexible mechanism 60 and a second actuator 70, and one end of the second flexible mechanism 60 is connected to the base 50, and the other end is connected to the outer frame 20'; and the second actuator 70 can drive the light homogenizing component 11 to use the connection position between the second flexible mechanism 60 and the base 50 as the fulcrum AP2, so that the light homogenizing component 11 performs radial swing. Specifically, the light homogenizing component 11, for example, swings along the circumferential direction CD2 between the radial direction RD3 and the radial direction RD4 of the axis AX2. That is, the second flexible mechanism 60 and the second actuator 70 provide the light homogenizing component 11 with a second degree of freedom of swing.

[0038] When the second actuator 70 of the present disclosure pushes the light homogenizing component 11 , for example, the vibration frequency of the second actuator 70 is controlled to adjust the swing frequency of the light homogenizing component 11 in the second degree of freedom.

[0039] Specifically, the base 50 is disposed on the outer side of the outer frame 20' and adjacent to the outer frame 20', for example, disposed on at least one side of the outer frame 20' and spaced apart from the outer frame 20', so that when the outer frame 20' is pushed by the second actuator 70 to cause the light homogenizing component 11 to swing, there is a swingable space near the outer frame 20'. The base 50 is used to lock one end of the second flexible mechanism 60 so that the outer frame 20' can swing through the second flexible mechanism 60. In one embodiment, the base 50 can be used to fix the light homogenizing component 11 at an appropriate position in the optical engine. In one embodiment, the base 50 can be integrated with the frame of the optical engine, which is not limited by the present disclosure.

[0040] Specifically, the second flexible mechanism 60 is used to provide a flexible connection function. A flexible connection is relative to a rigid connection. In a rigid connection, there is no displacement between the relative connecting parts. A flexible connection, on the other hand, allows displacement between the connecting parts, such as pivoting or connecting with elastic materials. In a preferred embodiment, in addition to allowing the light homogenizing component 11 to swing with the connection position of the second flexible mechanism 60 and the base 50 as the fulcrum AP2, the second flexible mechanism 60 is also used to maintain the light receiving surface RS facing the same direction. That is, the second flexible mechanism 60 can provide a second degree of freedom, allowing the light homogenizing component 11 to swing in a planar direction parallel to or the same as that of the light receiving surface RS of the light homogenizing component 11. For example, the second flexible mechanism 60 is a second pivot located at the fulcrum AP2 and perpendicular to the light receiving surface RS.

[0041] In another embodiment of the present disclosure, the second flexible member 60 is an elastic material, such as a second elastic member. Specifically, the second elastic member can also be used to provide elastic restoring force for the reciprocating swing of the outer frame 20'. In one embodiment of the present disclosure, the second elastic member is a plate spring. One end of the plate spring is fixed to the outer frame 20', and the other end is fixed to the base 50.

[0042] The plate spring can be a plate-shaped structure of "I" or "Z", and the "I" structure in the middle of the letter is simpler than the existing structure.

[0043] In one embodiment of the present disclosure, the second flexible component 60 is connected to the outer frame 20' and the base 50 in the following manner: the second flexible component 60 is the main component connecting the outer frame 20' and the base 50. Specifically, in order to simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving parts, and effectively avoid the problems in the prior art, the second flexible component 60 is responsible for the main task of connecting the outer frame 20' and the base 50, but the provision of other components that assist the second flexible component 60, such as an outer cover, a guide groove or a guide rod, is not excluded. In another embodiment of the present disclosure, the second flexible component 60 is a second elastic component, which is the only component connecting the outer frame 20' and the base 50.

[0044] The setting of the fixed points of the second actuator 70 and the second flexible mechanism 60 disclosed in the present invention can achieve "the light homogenizing component 11 swings in a plane direction parallel to or the same as the light receiving surface RS of the light homogenizing component 11", and it is not easy to cause up and down swinging. Specifically, when the speckle elimination mechanism 100' is in operation, the fulcrum AP2 is a fixed rotation point, and the second actuator 70 can be regarded as a dynamic support point when powered on. Under the restriction of at least two fulcrums, the present invention can achieve the purpose of swinging the light homogenizing component 11 in the direction parallel to the light receiving surface RS by controlling the vibration frequency, swing angle and displacement.

[0045] Specifically, the second actuator 70 is used to drive the light homogenizing component to swing. Specifically, depending on the type and size of the optical machine and the severity of the speckle, the vibration frequency of the second actuator 70 disclosed in the present disclosure is preferably greater than 0 Hz and less than 400 Hz, or a higher vibration frequency; the swing angle or amplitude of the light homogenizing component 11 is preferably greater than 0 degrees and less than 10 degrees, or a higher swing angle; the displacement of the light homogenizing component 11 is preferably greater than 0 mm and less than 5 mm, or a higher displacement, to effectively eliminate speckle.

[0046] In one embodiment of the present disclosure, the second actuator 70 includes a first portion 71 and a second portion 72 corresponding to each other, and the first portion 71 is disposed on the outer frame 20'. The base 50 also provides a locking mechanism for the second portion 72 of the second actuator 40 so that the first portion 71 and the second portion 72 of the second actuator 70 are disposed opposite to each other.

[0047] In one embodiment of the present disclosure, the second actuator 70 corresponds to the first part 71 and the second part 72, such as a magnet and a coil that can be interchanged. The coil and the first part 71 and the second part 72 are a set of actuators that can be controlled to apply force to push the outer frame 20' to swing or to make the outer frame 20' swing through a second elastic member, such as a leaf spring.

[0048] In another embodiment of the present disclosure, the second actuator 70 corresponds to the first part 71 and the second part 72, such as a corresponding and interchangeable magnetic component and electromagnet. The magnetic component and the electromagnet are a set of actuators that can be controlled to apply force to push the outer frame 20' to swing or make the outer frame 20' swing through a second elastic member, such as a leaf spring.

[0049] Reference Figure 7The present disclosure also provides a speckle elimination mechanism 200, comprising: a supporting seat 10, an external frame 20, a first flexible mechanism 30, and a first actuator 40'. The supporting seat 10 includes a light homogenizing component 11 and the light homogenizing component is provided with a light receiving surface RS. The external frame 20 is arranged outside the supporting seat 10. The first flexible mechanism 30 connects the supporting seat 10 and the external frame 20, and is a main mechanism. The first actuator 40' is connected to the supporting seat 10 or the external frame 20. The first actuator 40' can drive the light homogenizing component 11 so that the light homogenizing component can swing with the connection position of the first flexible mechanism 30 and the external frame 20 as the fulcrum AP1, so as to maintain the light receiving surface RS of the light homogenizing component 11 continuously facing the same direction.

[0050] Specifically, the support seat 10 is a frame that supports and holds the light homogenizing component 11. The light homogenizing component 11 is disposed on the support seat 10. The support seat 10 is, for example, a hollow frame in the shape of a "U" character to surround the light homogenizing component 11. In another preferred embodiment, the support seat 10 at least surrounds two sides of the light homogenizing component 11, and in other preferred embodiments, surrounds three or four sides of the light homogenizing component 11. The support seat 10 can also be used to lock one end of the first flexible mechanism 30 and to provide locking for the first actuator 40' so that the first actuator 40' is disposed on the support seat 10 and pushes against the outer frame 20 to make the support seat 10 swing relative to the outer frame 20.

[0051] Specifically, the outer frame 20 is disposed on the outer side of the support base 10 and adjacent to the support base 10, for example, it is disposed on at least one side of the support base 10 and is spaced apart from the support base 10 by a distance, so that when the support base 10 is pushed by the first actuator 40 to cause the light homogenizing component 11 to swing, there is a swingable space near the support base 10. The outer frame 20 is used to lock the other end of the first flexible mechanism 30 so that the support base 10 can swing through the first flexible mechanism 30. The outer frame 20 can also provide a first actuator 40' for locking so that the first actuator 40' is disposed on the outer frame 20 to push the support base 10. In one embodiment, the outer frame 20 can be used to fix the light homogenizing component 11 at an appropriate position in the optical engine. In one embodiment, the outer frame 20 can be integrated with the frame of the optical engine, which is not limited by the present disclosure.

[0052] The axis of the speckle elimination mechanism 200 is similar to Figure 3 For axis AX1, please refer to Figure 3 and Figure 7Specifically, the light homogenizing component 11 swings along the circumferential direction CD1 between the radial direction RD1 and the radial direction RD2 of the axis AX1. In one embodiment, when the actuator 40' pushes the light homogenizing component 11, the swing frequency of the light homogenizing component 11 is adjusted by controlling the vibration frequency of the actuator 40', for example. Specifically, the main difference between the speckle elimination mechanism 200 and the speckle elimination mechanism 100 is that the first actuator 40' of the speckle elimination mechanism 200 is a contact actuator, which has only one main component, and is different from the first actuator 40 of the speckle elimination mechanism 100 in two parts. Therefore, other components in the speckle elimination mechanism 200 that are the same as those in the speckle elimination mechanism 100 can refer to the above description.

[0053] Apart from Figure 7 In addition, the swing of the light homogenizing component 11 can also refer to the speckle elimination mechanism 100 and Figure 2A , 2B Specifically, the radial direction RD1 is, for example, Figure 2A As shown, along the initial direction of the first flexible member 30, the light homogenizing component 11 is pushed by the first actuator 40' from the radial direction RD1 to the radial direction RD2, and then pulled back to the radial direction RD1 by the first actuator 40', so as to perform reciprocating swing, but the present disclosure is not limited thereto. Figure 2B The radial direction RD1 and the radial direction RD2 may also be located on both sides of the initial position SP of the first flexible member 30, that is, when the light homogenizing component 11 is pushed by the first actuator 40, it swings from the initial position SP of the first flexible member 30 to the radial direction RD2, and then is pulled back to the initial position SP of the first flexible member 30 by the first actuator 40 and continues to swing to the radial direction RD1, and then is swung back to the initial position SP of the first flexible member 30 by the action of the first actuator 40, and reciprocating swings are performed in this way.

[0054] Specifically, depending on the type and size of the optical machine and the severity of the speckle, the vibration frequency of the first actuator 40' disclosed in the present invention is preferably greater than 0 Hz and less than 400 Hz, or a higher vibration frequency; the swing angle or amplitude of the light homogenizing component 11 is preferably greater than 0 degree and less than 10 degrees, or a higher swing angle; the displacement of the light homogenizing component 11 is preferably greater than 0 mm and less than 5 mm, or a higher displacement, so as to effectively eliminate the speckle.

[0055] Specifically, the light homogenizing component 11 is used to eliminate speckle of the laser light source. The light homogenizing component is configured to allow the laser light source to irradiate the light receiving surface RS of the light homogenizing component and reflect back to the light path. In one embodiment of the present disclosure, the light homogenizing component 11 is a diffuser. Specifically, the light homogenizing component 11 can also be a microlens array, a light diffusion component, or a reflective component with a microstructure surface.

[0056] Specifically, the first flexible mechanism 30 is used to provide a flexible connection function. A flexible connection is relative to a rigid connection. In a rigid connection, there is no displacement between the relative connecting parts. A flexible connection, on the other hand, allows displacement between the connecting parts, such as pivoting or connecting with elastic materials. In a preferred embodiment, in addition to allowing the light homogenizing component 11 to swing with the connection position between the first flexible mechanism 30 and the external frame 20 as a fulcrum AP1, the first flexible mechanism 30 is also used to maintain the light receiving surface RS facing the same direction. That is, the first flexible mechanism 30 can provide a first degree of freedom, allowing the light homogenizing component 11 to swing in a planar direction parallel to or the same as that of the light receiving surface RS of the light homogenizing component 11. For example, the first flexible mechanism 30 is a first pivot located at the fulcrum AP1 and perpendicular to the light receiving surface RS.

[0057] In another embodiment of the present disclosure, the first flexible member 30 is an elastic material, such as a first elastic member. Specifically, the first elastic member can also be used to provide an elastic restoring force for the reciprocating swing of the light homogenizing component 11. In one embodiment of the present disclosure, the first elastic member is a plate spring. One end of the plate spring is fixed to the bearing seat 10, and the other end is fixed to the outer frame 20. The plate spring can be a plate-shaped structure of "I" or "Z", and the "I" structure in the middle of the letter is simpler than the existing structure.

[0058] Apart from Figure 7 In addition, the swing of the light homogenizing component 11 can also refer to the speckle elimination mechanism 100 and Figure 2A , 2B Specifically, in another embodiment of the present disclosure, when the first flexible member 30 is a first elastic member, the radial direction RD1 is, for example, Figure 2A The initial direction of the first flexible member 30 is shown, that is, the position of the first elastic member when no force is applied. The light homogenizing component 11 is pushed from the radial direction RD1 to the radial direction RD2 by the first actuator 40, and then swings back to the radial direction RD1 by the elastic restoring force of the first flexible member 30, and performs reciprocating swing in this way, but the present disclosure is not limited thereto. Figure 2B The radial direction RD1 and the radial direction RD2 may also be located at both sides of the initial position SP of the first flexible member 30, that is, when the light homogenizing component 11 is pushed by the first actuator 40, it swings from the initial position SP of the first flexible member 30 to the radial direction RD2, and then swings back to the initial position SP of the first flexible member 30 by the elastic force of the first flexible member 30 and continues to swing toward the radial direction RD1, and then swings back to the initial position SP of the first flexible member 30 by the elastic force of the first flexible member 30 or the force of the first actuator 40, and performs reciprocating swing in this way.

[0059] In one embodiment of the present disclosure, the first flexible mechanism 30 is connected to the bearing seat and the outer frame in the following manner: the first flexible mechanism 30 is the main mechanism connecting the bearing seat 10 and the outer frame 20. Specifically, in order to simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving parts, and effectively avoid the problems in the prior art, the first flexible mechanism 30 is responsible for the main task of connecting the bearing seat 10 and the outer frame 20, but the provision of other components that assist the first flexible mechanism 30, such as an outer cover, a guide groove or a guide rod, etc., is not excluded. In another embodiment of the present disclosure, the first flexible mechanism 30 is a first elastic mechanism, which is the only mechanism connecting the bearing seat 10 and the outer frame 20.

[0060] The setting of the fixed points of the first actuator 40' and the first flexible mechanism 30 disclosed in the present invention can achieve "the light homogenizing component 11 swings in a plane direction parallel to or the same as the light receiving surface RS of the light homogenizing component 11", and it is not easy to cause up and down swinging. Specifically, when the speckle elimination mechanism 200 is in operation, the fulcrum AP1 is a fixed rotation point, and the actuator 40 can be regarded as a dynamic support point when powered on. Under the restriction of at least two fulcrums, the present invention can achieve the purpose of swinging the light homogenizing component 11 in the direction parallel to the light receiving surface RS by controlling the vibration frequency, swing angle and displacement.

[0061] Specifically, the first actuator 40' is used to provide a thrust for the light homogenizing component 11 to swing. In one embodiment of the present disclosure, the first actuator 40' is a contact actuator, such as a piezoelectric component. The piezoelectric component is, for example, disposed on the outer frame 20 or the supporting seat 10. The piezoelectric component is used to swing the diffuser at a small angle through the first flexible mechanism 30, and the structure is simple and the volume is smaller than the existing motor-rotating wheel-shaped diffuser structure.

[0062] In another embodiment of the present disclosure, the first actuator 40' is a contact actuator, such as a voice coil motor. The voice coil motor is, for example, disposed on the outer frame 20 or the support base 10. Similarly, the use of the voice coil motor to swing the diffuser at a small angle through the first flexible mechanism 30 has a simple structure and a smaller volume than the existing motor rotating wheel diffuser structure.

[0063] In other embodiments of the present disclosure, the first actuator 40 ′ is a contact actuator, such as a stepping motor or a servo motor.

[0064] Specifically, the first actuator 40' of the speckle elimination mechanism 200, for example, provides the light homogenizing component 11 with a swing in a first degree of freedom. In addition, the light homogenizing component 11 can also swing in a second degree of freedom. Figure 8In one embodiment of the present disclosure, the speckle elimination mechanism 200' further includes a base 50, a second flexible member 60 and a second actuator 70', wherein one end of the second flexible member 60 is connected to the base 50, and the other end is connected to the outer frame 20'; and the second actuator 70' can drive the light homogenizing component 11 to swing in a second radial direction with the connection position between the second flexible member 60 and the base 50 as the fulcrum AP2. That is, the second flexible member 60 and the second actuator 70' provide the light homogenizing component 11 with a second degree of freedom for swinging.

[0065] When the second actuator 70 ′ of the present disclosure pushes the light homogenizing component 11 , for example, the vibration frequency of the second actuator 70 ′ is controlled to adjust the swing frequency of the light homogenizing component 11 in the second degree of freedom.

[0066] Specifically, the axis position of the speckle elimination mechanism 200' is similar to the axis AX2 of the speckle elimination mechanism 100'. Figure 8 and Figure 4A The light homogenizing component 11 performs a second radial swing, for example, swinging along the circumferential direction CD2 between the radial directions RD3 and RD4 of the axis AX2.

[0067] Specifically, the base 50 is disposed on the outer side of the outer frame 20' and adjacent to the outer frame 20', for example, disposed on at least one side of the outer frame 20' and spaced apart from the outer frame 20', so that when the outer frame 20' is pushed by the second actuator 70' to cause the light homogenizing component 11 to swing, there is a swingable space near the outer frame 20'. The base 50 is used to lock one end of the second flexible mechanism 60 so that the outer frame 20' can swing through the second flexible mechanism 60. In one embodiment, the base 50 can be used to fix the light homogenizing component 11 at an appropriate position in the optical engine. In one embodiment, the base 50 can be integrated with the frame of the optical engine, which is not limited by the present disclosure.

[0068] Specifically, the second flexible mechanism 60 is used to provide a flexible connection function. A flexible connection is relative to a rigid connection. In a rigid connection, there is no displacement between the relative connecting parts. A flexible connection, on the other hand, allows displacement between the connecting parts, such as pivoting or connecting with elastic materials. In a preferred embodiment, in addition to allowing the light homogenizing component 11 to swing with the connection position of the second flexible mechanism 60 and the base 50 as the fulcrum AP2, the second flexible mechanism 60 is also used to maintain the light receiving surface RS facing the same direction. That is, the second flexible mechanism 60 can provide a second degree of freedom, allowing the light homogenizing component 11 to swing in a planar direction parallel to or the same as that of the light receiving surface RS of the light homogenizing component 11. For example, the second flexible mechanism 60 is a second pivot located at the fulcrum AP2 and perpendicular to the light receiving surface RS.

[0069] In another embodiment of the present disclosure, the second flexible member 60 is an elastic material, such as a second elastic member. Specifically, the second elastic member can also be used to provide elastic restoring force for the reciprocating swing of the outer frame 20'. In one embodiment of the present disclosure, the second elastic member is a plate spring. One end of the plate spring is fixed to the outer frame 20', and the other end is fixed to the base 50.

[0070] The plate spring can be a plate-shaped structure of "I" or "Z", and the "I" structure in the middle of the letter is simpler than the existing structure.

[0071] In one embodiment of the present disclosure, the second flexible component 60 is connected to the outer frame 20' and the base 50 in the following manner: the second flexible component 60 is the main component connecting the outer frame 20' and the base 50. Specifically, in order to simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving parts, and effectively avoid the problems in the prior art, the second flexible component 60 is responsible for the main task of connecting the outer frame 20' and the base 50, but the provision of other components that assist the second flexible component 60, such as an outer cover, a guide groove or a guide rod, is not excluded. In another embodiment of the present disclosure, the second flexible component 60 is a second elastic component, which is the only component connecting the outer frame 20' and the base 50.

[0072] The setting of the fixing point of the second actuator 70' and the second flexible mechanism 60 disclosed in the present invention can achieve "the light homogenizing component 11 swings in a plane direction parallel to or the same as the light receiving surface RS of the light homogenizing component 11", and it is not easy to cause up and down swing. Specifically, when the speckle elimination mechanism 100' is in operation, the fulcrum AP2 is a fixed rotation point, and the second actuator 70' can be regarded as a dynamic support point when powered on. Under the restriction of at least two fulcrums, the present invention can achieve the purpose of swinging the light homogenizing component 11 in the direction parallel to the light receiving surface RS by controlling the vibration frequency, swing angle and displacement.

[0073] Specifically, the second actuator 70' is used to provide thrust for the light homogenizing component 11 to swing. Specifically, depending on the type and size of the optical machine and the severity of the speckle, the vibration frequency of the second actuator 70' disclosed in the present disclosure is preferably greater than 0 Hz and less than 400 Hz, or a higher vibration frequency; the swing angle or amplitude of the light homogenizing component 11 is preferably greater than 0 degrees and less than 10 degrees, or a higher swing angle; the displacement of the light homogenizing component 11 is preferably greater than 0 mm and less than 5 mm, or a higher displacement, to effectively eliminate speckle.

[0074] In one embodiment of the present disclosure, the second actuator 70' is a contact actuator, such as a piezoelectric component. The piezoelectric component is, for example, disposed on the outer frame 20' or the base 50. The piezoelectric component is used to swing the diffuser at a small angle through the second flexible mechanism 60, which has a simple structure and a smaller volume than the existing motor-rotating wheel-shaped diffuser structure.

[0075] In one embodiment of the present disclosure, the second actuator 70' is a contact actuator, such as a voice coil motor. The voice coil motor is, for example, disposed on the outer frame 20' or the base 50. Similarly, the use of the voice coil motor to swing the diffuser at a small angle through the second flexible mechanism 60 has a simple structure and a smaller volume than the existing motor rotating wheel diffuser structure.

[0076] In other embodiments of the present disclosure, the second actuator 70 ′ is a contact actuator, such as a stepping motor or a servo motor.

[0077] Figure 8 The second actuator 70' is shown as a contact actuator, but in one embodiment of the present disclosure, Figure 5The second actuator 70 is similar to the second actuator shown in the figure, and the second actuator 70 can be a non-contact actuator, for example, including a corresponding first part 71 and a second part 72, and the first part 71 is arranged on the outer frame 20'. Specifically, because the second actuator 70 is responsible for driving the entire structure including the outer frame 20', the first flexible mechanism 30, the support seat 10 and the light homogenizing component 11, it may require a larger driving force depending on the actual weight of the structure, and an actuator with a larger driving force can be selected, for example, the driving force of the second actuator 70 is selected to be greater than the driving force of the first actuator 40.

[0078] Specifically, in other embodiments of the present disclosure, the second actuator and the first actuator may both be non-contact actuators or both be contact actuators, or one may be a contact actuator and the other may be a non-contact actuator, and the present disclosure does not limit this. Non-contact actuators include, for example, magnets and coils that can be interchanged or magnetic conductive components and electromagnets that can be interchanged. Contact actuators include, for example, piezoelectric components, stepper motors, servo motors, or voice coil motors.

[0079] In one embodiment of the present disclosure, the second actuator 70 corresponds to the first part 71 and the second part 72, such as a magnet and a coil that can be interchanged. The magnet and the coil are a set of actuators that can be controlled to apply force to push the outer frame 20' to swing or make the outer frame 20' swing through a second elastic member, such as a leaf spring.

[0080] In another embodiment of the present disclosure, the second actuator 70 corresponds to the first part 71 and the second part 72, such as a corresponding and interchangeable magnetic component and electromagnet. The magnetic component and the electromagnet are a set of actuators that can be controlled to apply force to push the outer frame 20' to swing or make the outer frame 20' swing through a second elastic member, such as a leaf spring.

[0081] The present disclosure can be applied to the laser projector illumination light combining system architecture or other systems using laser light sources. The display component can be a digital light processing component (Digital Light Processing, DLP), a three-chip liquid crystal display component (3Liquid Crystal Display, 3LCD), or a liquid crystal on silicon (Liquid Crystal on Silicon, Lcos). Because the speckle effect of the laser light source will cause light spots to appear on the screen, the present disclosure swings the diffuser in the illumination system to achieve the effect of eliminating the speckle.

[0082] Compared with the prior art, the speckle elimination mechanism disclosed in the present invention provides the first flexible mechanism as the main mechanism connecting the supporting base and the external frame, and uses the first actuator to drive the light homogenizing component to swing in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component with the connection position between the first flexible mechanism and the external frame as a fulcrum. This can simplify the structure, facilitate assembly positioning and adjustment of the vibration path and direction of the moving part, and effectively avoid the problems in the prior art.

[0083] Although the disclosure has been shown and described with respect to one or more implementations, those skilled in the art will think of equivalent variations and modifications based on the reading and understanding of this specification and the accompanying drawings. This disclosure includes all such modifications and variations, and is limited only by the scope of the attached invention application. In particular, with respect to the various functions performed by the above-mentioned components, the terms used to describe such components are intended to correspond to any component (unless otherwise indicated) that performs the specified function of the component (e.g., it is functionally equivalent), even if the structure is not equivalent to the disclosed structure of the function in the exemplary implementation of the specification shown in this document. In addition, although the specific features of this specification have been disclosed with respect to only one of several implementations, such features can be combined with one or more other features of other implementations that are desired and advantageous for a given or specific application. Moreover, insofar as the terms "including", "having", "containing" or their variations are used in a specific embodiment or claim, such terms are intended to be included in a manner similar to the term "comprising".

[0084] The above are only preferred implementations of the present disclosure. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principles of the present disclosure, and these improvements and modifications should also be regarded as within the protection scope of the present disclosure.

[0085] Explanation of symbols: 10 supporting seat; 11 light homogenizing component; 100, 100', 200, 200' speckle elimination mechanism; 20, 20' outer frame; 30 first flexible member; 40, 40' first actuator; 41, 71 first part; 42, 72 second part; 50 base; 60 second flexible member; 70, 70' second actuator; AX1, AX2 axis; AP1, AP2 fulcrum; RD1, RD2, RD3, RD4 radial direction; CD1, CD2 circumferential direction; SP initial position; RS light receiving surface.

Claims

1. A speckle elimination mechanism, characterized in that: The speckle elimination mechanism comprises: A bearing seat; A light homogenizing component is provided with a light receiving surface and is disposed on the supporting seat; An external frame, disposed adjacent to the bearing seat; A first elastic member, which is the only member connecting the bearing seat and the outer frame; as well as A first actuator comprises a first part and a second part which are relatively movable, and the first part is arranged on the supporting seat, and the first actuator can drive the light homogenizing component, with the connection position between the first elastic member and the external frame as a fulcrum, so that the light homogenizing component swings in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component.

2. The speckle elimination mechanism according to claim 1, characterized in that: The first elastic member is a plate spring.

3. A speckle elimination mechanism, characterized in that: The speckle elimination mechanism comprises: A supporting seat, comprising a light homogenizing component, wherein the light homogenizing component is provided with a light receiving surface; An external frame, arranged outside the bearing seat; A first flexible component is a main component connecting the bearing seat and the outer frame; as well as A first actuator comprises a first part and a second part which are relatively movable, and the first part is arranged on the supporting seat; and the first actuator can drive the light homogenizing component by means of the first part and the second part which are relatively movable, so that the light homogenizing component can swing with the connection position between the first flexible mechanism and the external frame as a fulcrum to maintain the light receiving surface to continuously face the same direction.

4. The speckle elimination mechanism according to any one of claims 1 to 3, characterized in that: The light homogenizing component is a diffusion sheet.

5. The speckle elimination mechanism according to any one of claims 1 to 3, characterized in that: The first part and the second part corresponding to the first actuator are a magnet and a coil which are interchangeable with each other or a magnetic conductive component and an electromagnet which are interchangeable with each other.

6. The speckle elimination mechanism according to any one of claims 1 to 3, characterized in that: The speckle elimination mechanism further includes a base, a second elastic member and a second actuator, wherein one end of the second elastic member is connected to the base, and the other end of the second elastic member is connected to the outer frame, and the second actuator can drive the light homogenizing component to swing in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component with the connection position between the second elastic member and the base as a fulcrum.

7. The speckle elimination mechanism according to claim 6, characterized in that: The second actuator includes a corresponding first part and a second part, and the first part of the second actuator is arranged on the outer frame, wherein the corresponding first part and the second part of the second actuator are correspondingly interchangeable magnets and coils or correspondingly interchangeable magnetic conductive components and electromagnets.

8. A speckle elimination mechanism, characterized in that: The speckle elimination mechanism comprises: A supporting seat, comprising a light homogenizing component, wherein the light homogenizing component is provided with a light receiving surface; An external frame, arranged outside the bearing seat; a first flexible member connecting the supporting base and the outer frame; and A first actuator is connected to the supporting seat or the external frame, wherein the first actuator can drive the light homogenizing component so that the light homogenizing component can swing with the connection position between the first flexible mechanism and the external frame as a fulcrum to maintain the light receiving surface of the light homogenizing component continuously facing the same direction.

9. The speckle elimination mechanism according to claim 8, characterized in that: The first actuator is a piezoelectric component, a stepping motor, a servo motor or a voice coil motor.

10. The speckle elimination mechanism according to any one of claims 8 to 9, characterized in that: The speckle elimination mechanism further includes a base, a second elastic member and a second actuator, wherein one end of the second elastic member is connected to the base, and the other end of the second elastic member is connected to the outer frame, and the second actuator can drive the light homogenizing component to swing in a planar direction parallel to or the same as the light receiving surface of the light homogenizing component with the connection position between the second elastic member and the base as a fulcrum.

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