Laser speckle suppression device

Abstract

A laser speckle suppression device relates to the technical field of optical display. The laser speckle suppression device comprises an optical sheet, a base, a driving assembly and a moving assembly, wherein the base, the driving assembly and the moving assembly are sequentially stacked. The optical sheet is arranged on the face, facing or deviating from the base, of the moving assembly. The moving assembly comprises a hollow elastic piece, and the driving assembly can drive the elastic piece to move in the first direction or the second direction on the plate face. Or the moving assembly comprises a hollow inner elastic piece and an outer elastic piece arranged outside the inner elastic piece in a sleeving mode, the outer elastic piece is of a hollow structure, the hollow portion of the outer elastic piece and the hollow portion of the inner elastic piece are coaxially arranged, and the driving assembly drives the inner elastic piece to move in the first direction and drives the outer elastic piece to move in the second direction on the plate face so that the laser beams entering the optical piece can be overlapped, therefore, laser speckles are inhibited, and imaging chromatic aberration is optimized; the first direction is perpendicular to the second direction. The device can adjust the number of the elastic pieces and the assembling positions of the optical pieces according to application scenes, and the applicability and diversity of the device structure are improved.

Description

Technical Field

[0001] The present invention relates to the field of optical display technology, and in particular to a laser speckle suppression device. Background Art

[0002] Laser light sources are usually used as projection light sources due to their advantages such as high brightness, pure color, and long life. However, the coherence of lasers will produce speckles, which will seriously affect the clarity and contrast of the picture, thereby reducing the picture quality and affecting the viewing effect. In order to improve the picture quality, a vibrating optical sheet is currently commonly used to suppress speckles, which can suppress speckles by temporally superimposing different speckle images within the integration time of the human eye.

[0003] At present, the vibration of optical sheets on the market usually uses two elastic sheets to drive the optical sheets to vibrate at high frequency along the X-axis direction or the Y-axis direction respectively, which makes the assembly structure more complicated; in addition, such an assembly structure is relatively simple, which reduces the applicability of the device and the diversity of application scenarios. Summary of the invention

[0004] The object of the present invention is to provide a laser speckle suppression device, which can adjust the number of spring pieces and the assembly position of the optical sheet according to the application scenario, thereby improving the applicability and structural diversity of the device structure.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In one aspect of the present invention, a laser speckle suppression device is provided, comprising an optical sheet and a base, a driving component and a moving component which are sequentially stacked, wherein the optical sheet is arranged on a side of the moving component facing toward or away from the base; the moving component comprises a hollow spring sheet, and the driving component can drive the spring sheet to move in a first direction or a second direction on a board surface; or, the moving component comprises a hollow inner spring sheet and an outer spring sheet sleeved on the outer periphery of the inner spring sheet, the outer spring sheet is a hollow structure, and the hollow portion of the outer spring sheet is coaxially arranged with the hollow portion of the inner spring sheet, and the PCB board can drive the inner spring sheet to move in the first direction on the board surface, and drive the outer spring sheet to move in the second direction; the first direction and the second direction are perpendicular to each other.

[0007] Optionally, the spring sheet has a first mounting surface and an elastic support frame arranged around the periphery of the first mounting surface, and the first mounting surface and the elastic support frame are an integrally formed part; the spring sheet is fixedly connected to the base through the elastic support frame on opposite sides along the first direction; the first mounting surface is fixedly connected to the elastic support frame on opposite sides along the second direction respectively; and the middle part of the first mounting surface has a hollow portion.

[0008] Optionally, the panel of the first mounting surface is higher than the top surface of the elastic support frame in the stacking direction of the base and the spring sheet; the first mounting surface is provided with connecting parts connected to the elastic support frame on opposite sides along the first direction, and the connecting parts are L-shaped.

[0009] Optionally, the elastic support frame has four elastic force arms, and two adjacent elastic force arms are connected by a bending portion, and the bending portion is arranged along the stacking direction of the base and the spring sheet.

[0010] Optionally, the elastic support frame is provided with mounting portions on opposite sides along the first direction, the mounting portions are arranged between two adjacent bending portions, and the opposite sides of the mounting portions are respectively connected to the bending portions through elastic force arms; the elastic force arms on both sides of the mounting portions are linear, or the elastic force arms on both sides of the mounting portions are curved.

[0011] Optionally, the elastic force arm is bent in a right angle, or the elastic force arm is bent in an arc shape.

[0012] Optionally, the inner spring sheet includes a second mounting surface, and two first elastic support members are respectively arranged on opposite sides of the second mounting surface along the first direction, and the first elastic support members are perpendicular to the second mounting surface; the outer spring sheet includes a third mounting surface, and the second mounting surface of the inner spring sheet is attached to a side of the third mounting surface facing the base; two second elastic support members are respectively arranged on opposite sides of the third mounting surface along the second direction.

[0013] Optionally, the end of the first elastic support member has a first connecting plate, the plate surface of the first connecting plate is arranged parallel to the third mounting surface, and the inner spring sheet is fixedly connected to the outer spring sheet through the first connecting plate; the end of the second elastic support member has a second connecting plate, and the outer spring sheet is fixedly connected to the base through the second connecting plate.

[0014] Optionally, the first elastic support member includes a first fixing portion and a first elastic arm, and the first elastic support member is connected to the second mounting surface through the first fixing portion; the first fixing portion and the first connecting plate are respectively located at opposite ends of the first elastic arm, and the first fixing portion and the first elastic arm are arranged in an L shape.

[0015] Optionally, the second elastic support member includes a second fixing portion and a second elastic arm, and the second elastic support member is connected to the third mounting surface via the second fixing portion; the second fixing portion and the second connecting plate are respectively located at opposite ends of the second elastic arm, and the second fixing portion and the second elastic arm are arranged in an L shape.

[0016] Optionally, the driving component includes a PCB board, a driving board and a magnet, the PCB board is arranged on the base, and the driving board is connected to the PCB board; coils are respectively buried on the opposite sides of the first direction and the opposite sides of the second direction in the PCB board, and the magnet is arranged on the side of the PCB board away from the base to correspond to the coil.

[0017] Optionally, the driving component includes an FPC wiring board, a coil and a magnet. The coil is welded to the FPC wiring board and is arranged on the board surface of the base on opposite sides of the first direction a and opposite sides of the second direction b. The magnet and the coil are arranged correspondingly; the coil and the magnet can interact with each other to drive the moving component to drive the optical sheet to move along the first direction or the second direction.

[0018] The beneficial effects of the present invention include:

[0019] The present application provides a laser speckle suppression device, comprising an optical sheet and a base, a driving component and a moving component which are stacked in sequence, wherein the optical sheet is arranged on a side of the moving component facing toward or away from the base, so as to improve the applicability and flexibility of the device; the moving component comprises a hollow spring sheet, and the driving component can drive the spring sheet to move in a first direction or a second direction on a plate surface, respectively; by setting a single spring sheet, the volume and weight of the device are reduced, which is conducive to improving the sensitivity of the device response, and also improves the consistency of the spring sheet driving the optical sheet to move in the first direction or the second direction respectively; at the same time, the setting of the single spring sheet is convenient for The assembly is simple and has a stronger ability to resist external impact interference due to uniform force; or, the moving component includes a hollow inner shrapnel and an outer shrapnel sleeved on the outer periphery of the inner shrapnel, the outer shrapnel is a hollow structure, and the hollow part of the outer shrapnel is coaxially arranged with the hollow part of the inner shrapnel, the driving component can drive the inner shrapnel to move in the first direction on the board surface, and drive the outer shrapnel to move in the second direction. Through the arrangement of the inner shrapnel and the outer shrapnel, it is beneficial to accurately control the movement of the inner and outer shrapnel while the driving force used is small, avoiding mutual interference and affecting the movement accuracy, and improving the efficiency and effect of laser speckle suppression. The driving component can drive the moving component to drive the optical sheet to vibrate at high frequency in the first direction and the second direction, so that the laser beam injected into the optical sheet is superimposed, thereby suppressing laser speckle and optimizing imaging chromatic aberration; the first direction and the second direction are perpendicular to each other. The laser speckle suppression device can adjust the number of shrapnel and the assembly position of the optical sheet according to the application scenario, improving the applicability and structural diversity of the device structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 One of the structural schematic diagrams of the laser speckle suppression device provided in an embodiment of the present invention;

[0022] Figure 2A second structural schematic diagram of a laser speckle suppression device provided in an embodiment of the present invention;

[0023] Figure 3 One of the structural schematic diagrams of the moving component of the laser speckle suppression device provided by an embodiment of the present invention;

[0024] Figure 4 A third structural schematic diagram of a laser speckle suppression device provided in an embodiment of the present invention;

[0025] Figure 5 A second structural schematic diagram of a moving component of a laser speckle suppression device provided by an embodiment of the present invention;

[0026] Figure 6 A fourth structural schematic diagram of a laser speckle suppression device provided in an embodiment of the present invention;

[0027] Figure 7 A third structural schematic diagram of a moving component of a laser speckle suppression device provided in an embodiment of the present invention;

[0028] Figure 8 A fourth structural schematic diagram of a moving component of a laser speckle suppression device provided in an embodiment of the present invention;

[0029] Fig. 9 A schematic diagram of the structure of an inner spring piece of a laser speckle suppression device provided by an embodiment of the present invention;

[0030] Fig.10 A schematic diagram of the structure of an outer spring piece of a laser speckle suppression device provided by an embodiment of the present invention;

[0031] Fig.11 One of the structural schematic diagrams of the shrapnel of the laser speckle suppression device provided in an embodiment of the present invention;

[0032] Fig.12 A fifth structural schematic diagram of a laser speckle suppression device provided in an embodiment of the present invention;

[0033] Fig.13 A second structural schematic diagram of a spring piece of the laser speckle suppression device provided in an embodiment of the present invention;

[0034] Fig.14 The sixth structural schematic diagram of the laser speckle suppression device provided in an embodiment of the present invention.

[0035] Icons: 100-laser speckle suppression device; 110-optical sheet; 120-base; 130-driving assembly; 131-coil; 132-magnet; 133-PCB board; 134-FPC wiring board; 140-moving assembly; 141-spring; 1411-first mounting surface; 1412-elastic support frame; 1412A-bending portion; 1412B-mounting portion; 1412C-elastic force arm; 1413-connection part; 142-inner spring piece; 1421-second mounting surface; 1422-first elastic support member; 1422A-first fixing portion; 1422B-first elastic arm; 1423-first connecting plate; 143-outer spring piece; 1431-third mounting surface; 1432-second elastic support member; 1432A-second fixing portion; 1432B-second elastic arm; 1433-second connecting plate; a-first direction; b-second direction. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0039] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0040] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] Please refer to Figure 1 and Figure 4 The present embodiment provides a laser speckle suppression device 100, comprising an optical sheet 110 and a base 120, a driving assembly 130 and a moving assembly 140 which are stacked in sequence, wherein the optical sheet 110 is arranged on a side of the moving assembly 140 which faces toward or away from the base 120; the moving assembly 140 comprises a hollow spring sheet 141, and the driving assembly 130 can drive the spring sheet 141 to move along a first direction a or a second direction b on a board surface; or, the moving assembly 140 comprises a hollow inner spring sheet 142 and an outer spring sheet 143 which is sleeved on the outer periphery of the inner spring sheet 142, the outer spring sheet 143 is a hollow structure, and the hollow portion of the outer spring sheet 143 is coaxially arranged with the hollow portion of the inner spring sheet 142, and the driving assembly 130 can drive the inner spring sheet 142 to move along a first direction a on the board surface, and drive the outer spring sheet 143 to move along a second direction b; the first direction a and the second direction b are perpendicular to each other.

[0043] Specifically, Figure 1 and Figure 4As shown, the present application provides a laser speckle suppression device 100, including a base 120, a driving assembly 130 and a moving assembly 140. The base 120 provides support and stability for the overall structure of the device. In the actual production and assembly process, the structure of the base 120 can be appropriately adjusted according to the assembly requirements, such as I-shaped, rectangular, etc.; the driving assembly 130 is arranged above the base 120, and the moving assembly 140 is arranged above the driving assembly 130. The driving assembly 130 can drive the moving assembly 140 to move along the first direction a or the second direction b. The moving assembly 140 has a hollow portion in the middle, and the hollow portion is used to set the optical sheet 110. The optical sheet 110 can be arranged on a side of the moving component 140 facing the base 120 to better ensure the cleanliness of the optical sheet 110, so that the laser speckle suppression device 100 has a stronger ability to resist external impact and interference; the optical sheet 110 can also be arranged on a side of the moving component 140 away from the base 120, so that the area of ​​the optical sheet 110 can be increased without increasing the volume of the laser speckle suppression device 100, and the effective area of ​​the laser speckle suppression device 100 can be used to the maximum extent.

[0044] Among them, Figure 1 and Figure 4 As shown, the moving component 140 may include a hollow spring piece 141, the hollow part is used to set the optical sheet 110, and the driving component 130 can drive the spring piece 141 to move along the first direction a or the second direction b, thereby driving the optical sheet 110 to move along the first direction a or the second direction b, so that the propagation path of the light with speckle is changed, so that the position and intensity of the bright spot are no longer stable. As the vibration continues, the speckle pattern is continuously disrupted in space and time, the contrast of the speckle is reduced, and finally the effect of suppressing the speckle is achieved; and the vibration can also make the propagation path of different color lights more diversified, so that the energy distribution of different color lights on the imaging plane is more uniform, thereby optimizing the imaging chromatic aberration.

[0045] Of course, in addition to the arrangement of a single spring piece 141, Figure 7 As shown, the moving assembly 140 may further include an inner spring sheet 142 and an outer spring sheet 143, both of which are hollow structures and the hollow parts of the two are coaxially arranged, so that when the optical sheet 110 is arranged on a side of the moving assembly 140 facing the base 120, it can be exposed from the hollow parts of the inner spring sheet 142 and the outer spring sheet 143 in sequence. The driving assembly 130 can drive the inner spring sheet 142 to move along the first direction a, and drive the outer spring sheet 143 to move along the second direction b, so as to eliminate speckle and optimize imaging chromatic aberration.

[0046] Existing laser speckle suppression devices are usually provided with an inner spring sheet and an outer spring sheet, which respectively drive the optical sheet to move in the first direction and the second direction, making the assembly structure relatively simple. The laser speckle suppression device 100 provided in the present application has two modes of providing a single spring sheet 141 and providing inner and outer spring sheets 143 respectively, and the optical sheet 110 can be provided on the side of the moving component 140 facing the base 120 or the side away from the base 120 as needed, which increases the diversity of the assembly structure, and can adjust the number of spring sheets 141 and the assembly position of the optical sheet 110 according to the needs of the installation scene, thereby improving the applicability of the device structure.

[0047] It should be noted that if Figure 6 As shown, in one possible implementation of the present application, as Fig.14 As shown, the driving component 130 includes a PCB board 133, a driving board and a magnet 132. The PCB board 133 is arranged on the base 120, and the driving board is connected to the PCB board 133. Coils 131 are respectively buried on two opposite sides along the first direction a and two opposite sides along the second direction b in the PCB board 133. The magnet 132 is arranged on a side of the PCB board 133 away from the base to correspond to the coil 131.

[0048] In another possible implementation of the present application, Figure 2 and Fig.12 As shown, the driving component 130 includes an FPC wiring board 134, a coil 131 and a magnet 132. The coil 131 is welded to the FPC wiring board and is arranged on the board surface of the base on the opposite sides of the first direction a and the opposite sides of the second direction b. The magnet 132 is arranged corresponding to the coil 131; the coil 131 and the magnet 132 can interact with each other to drive the moving component 140 to drive the optical sheet 110 to move along the first direction a or the second direction b.

[0049] Specifically, the drive assembly 130 includes the above two configurations, which can be adjusted according to assembly requirements, cost requirements, etc.; Figure 6 As shown, the driving assembly 130 is disposed on opposite sides of the base 120 along the first direction a and on opposite sides of the base 120 along the second direction b. When current passes through the coil 131, a magnetic field is generated around the coil 131. When the magnetic field generated by the coil 131 and the magnetic field of the magnet 132 are close to each other, an interaction between the magnetic fields occurs, thereby driving the moving assembly 140 to move. The moving assembly 140 can be driven by the driving assembly 130 to move in the first direction a and the second direction b respectively, or can move in the first direction a and the second direction b at the same time. The combined movement of the movement in the first direction a and the second direction b realizes displacement in any direction in the same plane.

[0050] When the moving component 140 includes a hollow spring piece 141, the movement amounts of the two driving components 130 arranged on the opposite sides along the first direction a are consistent, and can drive the spring piece 141 to move along the first direction a; the movement amounts of the two moving components 140 arranged on the opposite sides along the second direction b are consistent, and can drive the spring piece 141 to move along the second direction b.

[0051] When the moving component 140 includes an inner spring piece 142 and an outer spring piece 143, the two driving components 130 arranged on the opposite sides along the first direction a can drive the inner spring piece 142 to move along the first direction a, and the two driving components 130 arranged on the opposite sides along the second direction b can drive the outer spring piece 143 to move along the second direction b. The inner spring piece 142 and the outer spring piece 143 are driven by different forces respectively, which reduces the vibration-demanding driving force. At the same time, the combined movement of the inner spring piece 142 and the outer spring piece 143 can realize the displacement of the optical sheet 110 in any direction on the same plane, thereby achieving the purpose of eliminating speckles and optimizing chromatic aberration.

[0052] Of course, if Figure 2 As shown, in addition to respectively arranging the coil 131 and the magnet 132 on the opposite sides of the plate surface of the base 120 along the first direction a and the opposite sides of the second direction b, a pair of coils 131 and magnets 132 can also be arranged on the plate surface of the base 120 along the first direction a, and a pair of coils 131 and magnets 132 can be arranged on the plate surface of the base 120 along the second direction b. The movement of the moving component 140 in the direction is achieved by the two pairs of coils 131 and magnets 132, so as to reduce the cost and the volume of the device.

[0053] The laser speckle suppression device 100 provided in the present application includes an optical sheet 110 and a base 120, a driving component 130 and a moving component 140 which are stacked in sequence. The optical sheet 110 is arranged on a side of the moving component 140 facing or away from the base 120 to improve the applicability and flexibility of the device; the moving component 140 includes a hollow spring sheet 141, and the driving component 130 can drive the spring sheet 141 to move along the first direction a or the second direction b on the plate surface. By setting a single spring sheet 141, the volume and weight of the device are reduced, which is conducive to improving the sensitivity of the device response, and also improves the consistency of the spring sheet 141 driving the optical sheet 110 to move along the first direction a or the second direction b; at the same time, the single spring sheet 141 The arrangement is convenient for assembly, and has a stronger ability to resist external impact interference due to uniform force; or, the moving component 140 includes a hollow inner spring piece 142 and an outer spring piece 143 sleeved on the outer periphery of the inner spring piece 142, the outer spring piece 143 is a hollow structure, and the hollow part of the outer spring piece 143 is coaxially arranged with the hollow part of the inner spring piece 142, the driving component 130 can drive the inner spring piece 142 to move along the first direction a on the board surface, and drive the outer spring piece 143 to move along the second direction b, through the arrangement of the inner spring piece 142 and the outer spring piece 143, it is conducive to accurately control the movement of the inner and outer spring pieces 143 while the driving force used is small, avoiding mutual interference and affecting the movement accuracy, and improving the efficiency and effect of laser speckle suppression. The driving component can drive the moving component to drive the optical sheet to vibrate at high frequency along the first direction a and the second direction b, so that the laser beams injected into the optical sheet are superimposed, thereby suppressing laser speckle and optimizing imaging chromatic aberration; wherein the first direction a and the second direction b are perpendicular to each other. The laser speckle suppression device 100 can adjust the number of spring pieces 141 and the assembly position of the optical sheet 110 according to the application scenario, thereby improving the applicability and structural diversity of the device structure.

[0054] In one possible implementation of the present application, Figure 3 , Figure 5 As shown, the spring piece 141 has a first mounting surface 1411 and an elastic support frame 1412 arranged around the periphery of the first mounting surface 1411, and the first mounting surface 1411 and the elastic support frame 1412 are an integrally formed part; the spring piece 141 is fixedly connected to the base 120 on opposite sides along the first direction a through the elastic support frame 1412; the first mounting surface 1411 is fixedly connected to the elastic support frame 1412 on opposite sides along the second direction b respectively; the middle part of the first mounting surface 1411 has a hollow part.

[0055] Specifically, Figure 3 , Figure 5As shown, the spring piece 141 includes a first mounting surface 1411, and the first mounting surface 1411 is used to mount the optical sheet 110. The optical sheet 110 can be set on the side of the first mounting surface 1411 facing the base 120 by gluing, or be set on the side of the first mounting surface 1411 away from the base 120; the first mounting surface 1411 has a hollow portion, and when the optical sheet 110 is set on the side of the first mounting surface 1411 facing the base 120, it can be exposed from the hollow portion to ensure that the light beam can irradiate the optical sheet 110.

[0056] An elastic support frame 1412 is provided on the periphery of the first mounting surface 1411, and screw holes are provided on opposite sides of the elastic support frame 1412 along the first direction a, so as to penetrate fasteners to fix the spring piece 141 to the base 120, thereby ensuring that the spring piece 141 has a stable mounting position on the base 120, so that the spring piece 141 is not easily displaced when subjected to a driving force; at the same time, due to the elastic characteristics of the elastic support frame 1412, it can buffer the additional impact force that may be generated by the outside world on the spring piece 141 to a certain extent while being fixed, thereby further protecting the structural integrity and stability of the entire device.

[0057] The first mounting surface 1411 is fixedly connected to the elastic support frame 1412 at two opposite sides along the second direction b, which ensures the mounting stability of the first mounting surface 1411 and the optical sheet 110, and provides a certain vibration displacement space for the first mounting surface 1411, thereby improving the reliability of the laser speckle suppression device 100 in eliminating speckles and optimizing imaging chromatic aberration.

[0058] It should be noted that, in one possible implementation mode of the present application, first, Figure 3 , Figure 5 As shown, the panel of the first mounting surface 1411 is higher than the top surface of the elastic support frame 1412 in the stacking direction of the base 120 and the spring 141; the first mounting surface 1411 is provided with connecting parts 1413 connected to the elastic support frame 1412 on opposite sides along the first direction a, and the connecting parts 1413 are L-shaped.

[0059] Specifically, Figure 3 , Figure 5 As shown, the plate surface of the first mounting surface 1411 is higher than the top surface of the elastic support frame 1412, so that the first mounting surface 1411 has a unique spatial position in the vertical direction. When the driving force acts on the spring piece 141, the first mounting surface 1411 can have a certain room for movement within the space formed by this height difference, thereby improving the reliability of the laser speckle suppression device 100 in eliminating speckles and optimizing imaging chromatic aberration, and also having a stronger ability to resist external impact interference.

[0060] like Figure 3 , Figure 5As shown, the first mounting surface 1411 is provided with L-shaped connecting parts 1413 on opposite sides along the first direction a, and the L-shaped connecting parts 1413 are used to connect the first mounting surface 1411 with the elastic support frame 1412. The structure of the L-shaped connecting part 1413 can effectively disperse stress. When the spring piece 141 is subjected to external force, whether it is the driving force from the PCB board or the interference force from the external environment, the L-shaped connecting part 1413 can decompose and transmit these forces in both horizontal and vertical directions. In the horizontal direction, it can ensure the tight connection between the first mounting surface 1411 and the elastic support frame 1412, prevent the relative displacement between the two in the first direction a, thereby ensuring the stability of the entire spring piece 141 structure.

[0061] Second, if Figure 3 As shown, the elastic support frame 1412 has four elastic force arms 1412C, and two adjacent elastic force arms 1412C are connected by a bending portion 1412A. The bending portion 1412A is arranged along the stacking direction of the base 120 and the elastic sheet 141 .

[0062] Specifically, Figure 3 , Figure 5 , Fig.11 and Fig.13 As shown, the spring piece 141 can be an integrally formed part, and the elastic support frame 1412 is integrally formed by an elastic force arm 1412C and a bent portion 1412A, and a bent portion 1412A is provided at the connection between two adjacent elastic force arms 1412C, so that the four corners of the elastic support frame 1412 have bent portions 1412A, so as to facilitate the integral forming of the spring piece 141. At the same time, the provision of the bent portion 1412A can also more easily achieve symmetrical force, so that when the spring piece 141 is subjected to external force, the stress can be evenly distributed on the elastic support frame 1412. This is conducive to maintaining the overall stability of the spring piece 141, and can optimize the transmission of force, thereby improving the reliability of the laser speckle suppression device 100 in eliminating speckles and optimizing imaging chromatic aberration.

[0063] Alternatively, if Figure 3 , Figure 5 , Fig.11 and Fig.13 As shown, the elastic support frame 1412 is provided with mounting portions 1412B on opposite sides along the first direction, the mounting portion 1412B is arranged between two adjacent bending portions 1412A, and the opposite sides of the mounting portion 1412B are respectively connected to the bending portions 1412A through elastic force arms 1412C; the elastic force arms 1412C on both sides of the mounting portion 1412B are linear, or the elastic force arms 1412C on both sides of the mounting portion 1412B are curved.

[0064] Specifically, the spring piece 141 is fixedly connected to the base 120 through two mounting portions 1412B on opposite sides, and the mounting portion is arranged in the middle of the line connecting the two bent portions 1412A to ensure that the spring piece 141 is uniformly stressed at all locations during vibration. The arrangement of the elastic force arms on both sides of the mounting portion 1412B can be adjusted according to the actual vibration frequency required by the laser speckle suppression device 100, such as Figure 3 , Figure 5 As shown, the elastic force arms 1412C on both sides of the mounting portion 1412B are in a straight line shape. Of course, the elastic force arms 1412C on both sides of the mounting portion 1412B can also be in a curved shape, such as Fig.11 and Fig.13 As shown, the elastic force arm 1412C is arranged in an S shape. Of course, the elastic force arm 1412C can also be arranged in an approximate S shape. The present application does not impose any limitation on the specific bending shape of the elastic force arm 1412C, and it can be adjusted according to the actual vibration frequency required by the laser speckle suppression device 100.

[0065] Furthermore, if Fig.11 As shown, the elastic force arm 1412C is bent at a right angle, or is bent in an arc shape. According to the different bending shapes of the elastic force arm 1412C, the vibration frequency of the spring 141 can be adjusted accordingly, further improving the flexibility and adaptability of the laser speckle suppression device 100.

[0066] In addition to the above-mentioned specific implementation that the moving component 140 includes a spring piece 141, the moving component 140 may also include an inner spring piece 142 and an outer spring piece 143. The inner spring piece 142 and the outer spring piece 143 are welded and fixed to make the overall structure more stable.

[0067] For example, Figure 7 and Figure 8 As shown, the inner spring piece 142 includes a second mounting surface 1421, and two first elastic support members 1422 are respectively arranged on the opposite sides of the second mounting surface 1421 along the first direction a, and the first elastic support members 1422 and the second mounting surface 1421 are perpendicular to each other; the outer spring piece 143 includes a third mounting surface 1431, and the second mounting surface 1421 of the inner spring piece 142 is attached to the side of the third mounting surface 1431 facing the base 120; the third mounting surface 1431 is respectively arranged on the opposite sides of the second direction b.

[0068] Specifically, Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the inner spring piece 142 includes a second mounting surface 1421, and a hollow portion is arranged on the second mounting surface 1421; the outer spring piece 143 includes a third mounting surface 1431, and a hollow portion is arranged on the third mounting surface 1431, and the second mounting surface 1421 of the inner spring piece 142 is attached to the side of the third mounting surface 1431 facing the base 120, so that the outer spring piece 143 is sleeved on the outside of the inner spring piece 142; the inner spring piece 142 and the hollow portion of the outer spring piece 143 are coaxially arranged, and the optical sheet 110 can be arranged on the side of the second mounting surface 1421 facing the base 120, or on the side of the third mounting surface 1431 away from the base 120 by gluing; when the optical sheet 110 is arranged on the side of the second mounting surface 1421 facing the base 120, it can be exposed from the hollow portion to ensure that the light beam can be irradiated on the optical sheet 110.

[0069] like Figure 7 , Figure 8 , Fig. 9 and Fig.10 As shown, two first elastic support members 1422 are respectively provided on opposite sides of the second mounting surface 1421 along the first direction a, and the ends of the first elastic support members 1422 are fixedly connected to the inner wall of the outer elastic sheet 143. Through the provision of the first elastic support members 1422, the stable connection between the inner elastic sheet 142 and the outer elastic sheet 143 can be ensured, and the movement of the inner elastic sheet 142 along the first direction a can also be ensured;

[0070] like Fig.10 As shown, two second elastic support members 1432 are respectively provided on the opposite sides of the third mounting surface 1431 along the second direction b, and the ends of the second elastic support members 1432 are fixedly connected to the base 120. Through the setting of the second elastic support members 1432, the stable connection between the moving component 140 and the base 120 can be guaranteed, and the movement of the outer spring piece 143 along the second direction b can also be guaranteed.

[0071] It should be noted that, in one possible implementation mode of the present application, first, Figure 7 , Figure 8 and Fig. 9The end of the first elastic support member 1422 has a first connecting plate 1423, and the plate surface of the first connecting plate 1423 is arranged parallel to the third mounting surface 1431. The inner spring piece 142 can be welded to the third mounting surface 1431 through the plate surface of the first connecting plate 1423. Through the setting of the first connecting plate 1423, the area of ​​welding with the outer spring piece 143 is increased without affecting the first elastic support member 1422 driving the inner spring piece 142 to move along the first direction a, thereby further improving the stability of the moving component 140; the end of the second elastic support member 1432 has a second connecting plate 1433, and the outer spring piece 143 is fixedly connected to the base 120 through the second connecting plate 1433; through the setting of the second connecting plate 1433, the connection stability between the outer spring piece 143 and the base 120 is increased without affecting the second elastic support member 1432 driving the outer spring piece 143 to move along the second direction b.

[0072] Second, if Fig. 9 As shown, the first elastic support member 1422 includes a first fixing portion 1422A and a first elastic arm 1422B, and the first elastic support member 1422 is connected to the second mounting surface 1421 through the first fixing portion 1422A; the first fixing portion 1422A and the first connecting plate 1423 are respectively located at opposite ends of the first elastic arm 1422B, and the first fixing portion 1422A and the first elastic arm 1422B are arranged in an L shape.

[0073] By such a setting, the first elastic arm 1422B is suspended, and one end of the first elastic arm 1422B is connected to the two mounting surfaces through the first fixing portion 1422A, which not only ensures the stability of the first elastic support member 1422, but also can increase the vibration frequency of the first elastic arm 1422B, thereby improving the reliability of the laser speckle suppression device 100 in eliminating speckles and optimizing imaging chromatic aberration.

[0074] Third, if Fig.10 As shown, the second elastic support member 1432 includes a second fixing portion 1432A and a second elastic arm 1432B, and the second elastic support member 1432 is connected to the third mounting surface 1431 through the second fixing portion 1432A; the second fixing portion 1432A and the second connecting plate 1433 are respectively located at opposite ends of the second elastic arm 1432B, and the second fixing portion 1432A and the second elastic arm 1432B are arranged in an L shape.

[0075] By such a setting, the second elastic arm 1432B is suspended, and one end of the second elastic arm 1432B is connected to the three mounting surfaces through the second fixing portion 1432A, which not only ensures the stability of the second elastic support member 1432, but also can increase the vibration frequency of the second elastic arm 1432B, thereby improving the reliability of the laser speckle suppression device 100 in eliminating speckles and optimizing imaging chromatic aberration.

[0076] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0077] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. A laser speckle suppression device, characterized in that: The invention comprises an optical sheet (110), a base (120) stacked in sequence, a driving component (130) and a moving component (140), wherein the optical sheet (110) is arranged on a side of the moving component (140) facing toward or away from the base (120); the moving component (140) comprises a hollow spring sheet (141), and the driving component can drive the spring sheet (141) to move along a first direction (a) or a second direction (b) on a plate surface; or the moving component (140) comprises a hollow spring sheet (141). A hollow inner spring sheet (142) and an outer spring sheet (143) sleeved on the outer periphery of the inner spring sheet (142), the outer spring sheet (143) being a hollow structure, and the hollow portion of the outer spring sheet (143) being coaxially arranged with the hollow portion of the inner spring sheet (142), the driving component (130) being capable of driving the inner spring sheet (142) to move along a first direction (a) and driving the outer spring sheet (143) to move along a second direction (b) on a plate surface; the first direction (a) and the second direction (b) being perpendicular to each other.

2. The laser speckle suppression device according to claim 1, characterized in that: The spring sheet (141) comprises a first mounting surface (1411) and an elastic support frame (1412) arranged around the periphery of the first mounting surface (1411); the first mounting surface (1411) and the elastic support frame (1412) are integrally formed parts; the spring sheet (141) is fixedly connected to the base (120) via the elastic support frame (1412) on two opposite sides along a first direction (a); the first mounting surface (1411) is fixedly connected to the elastic support frame (1412) on two opposite sides along a second direction (b); and the middle part of the first mounting surface (1411) comprises a hollow part.

3. The laser speckle suppression device according to claim 2, characterized in that: The panel of the first mounting surface (1411) is higher than the top surface of the elastic support frame (1412) in the stacking direction of the base (120) and the spring sheet (141); the first mounting surface (1411) is provided with connecting parts (1413) connected to the elastic support frame (1412) on opposite sides along the first direction (a), and the connecting parts (1413) are L-shaped.

4. The laser speckle suppression device according to claim 2, characterized in that: The elastic support frame (1412) has four elastic force arms (1412C), and two adjacent elastic force arms (1412C) are connected via a bending portion (1412A), and the bending portion (1412A) is arranged along the stacking direction of the base (120) and the spring sheet (141).

5. The laser speckle suppression device according to claim 4, characterized in that: The elastic support frame (1412) is provided with mounting portions (1412B) on two opposite sides along the first direction (a); the mounting portion (1412B) is arranged between two adjacent bending portions (1412A), and the opposite sides of the mounting portion (1412B) are respectively connected to the bending portions (1412A) through the elastic force arms (1412C); the elastic force arms (1412C) on both sides of the mounting portion (1412B) are linear, or the elastic force arms (1412C) on both sides of the mounting portion (1412B) are curved.

6. The laser speckle suppression device according to claim 5, characterized in that: The elastic force arm (1412C) is bent in a right angle, or the elastic force arm (1412C) is bent in an arc shape.

7. The laser speckle suppression device according to claim 1, characterized in that: The inner elastic sheet (142) comprises a second mounting surface (1421), and two first elastic support members (1422) are respectively arranged on opposite sides of the second mounting surface (1421) along the first direction (a), and the first elastic support members (1422) and the second mounting surface (1421) are perpendicular to each other; the outer elastic sheet (143) comprises a third mounting surface (1431), and the second mounting surface (1421) of the inner elastic sheet (142) is attached to a side of the third mounting surface (1431) facing the base (120); and two second elastic support members (1432) are respectively arranged on opposite sides of the third mounting surface (1431) along the second direction (b).

8. The laser speckle suppression device according to claim 7, characterized in that: The end of the first elastic support member (1422) has a first connecting plate (1423), the plate surface of the first connecting plate (1423) is arranged parallel to the third mounting surface (1431), and the inner spring piece (142) is fixedly connected to the outer spring piece (143) via the first connecting plate (1423); the end of the second elastic support member (1432) has a second connecting plate (1433), and the outer spring piece (143) is fixedly connected to the base (120) via the second connecting plate (1433).

9. The laser speckle suppression device according to claim 1, characterized in that: The driving component (130) comprises a PCB board (133), a driving plate and a magnet (132); the PCB board (133) is arranged on the base (120), and the driving plate is connected to the PCB board (133); coils (131) are respectively embedded in the PCB board (133) on two opposite sides along the first direction (a) and on two opposite sides along the second direction (b); the magnet (132) is arranged on a side of the PCB board away from the base (120) so as to correspond to the coil (131).

10. The laser speckle suppression device according to claim 1, characterized in that: The driving component comprises an FPC wiring board, a coil (131) and a magnet (132); the coil (131) is welded to the FPC wiring board and is arranged on the board surface of the base (120) on two opposite sides along the first direction (a) and on two opposite sides along the second direction (b); the magnet (132) is arranged corresponding to the coil (131); the coil (131) and the magnet (132) can interact with each other to drive the moving component (140) to drive the optical sheet (110) to move along the first direction (a) or the second direction (b).

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