Optical element driving mechanism

Abstract

The utility model provides an optical element driving mechanism. The optical element driving mechanism comprises a first optical element, a fixed part, a first movable part and a first driving assembly. The first movable part is connected to the first optical element. The first movable part can move relative to the fixed part. The first driving assembly is used for driving the first movable part to move relative to the fixed part. The fixing part comprises a fixing part opening, and a light ray enters the fixing part opening along a main shaft.

Description

Technical Field

[0001] The utility model relates to an optical element driving mechanism, in particular to an optical element driving mechanism capable of changing the light passing amount. Background Art

[0002] In order to generate high-quality images, many electronic devices are equipped with an optical element driving mechanism (which can be called an aperture) capable of controlling the light passing amount. Currently, the optical element driving mechanism usually changes the size of the hole formed by multiple optical elements by changing the positions of the multiple optical elements, thereby controlling the light passing amount. However, the shape of the hole formed by the multiple optical elements may not be circular, resulting in uneven brightness of the generated image. Moreover, it is difficult to control the positions of the multiple optical elements. Summary of the Utility Model

[0003] The utility model provides an optical element driving mechanism. The optical element driving mechanism includes a first optical element, a fixing part, a first moving part, and a first driving component. The first moving part is connected to the first optical element. The first moving part can move relative to the fixing part. The first driving component is used to drive the first moving part to move relative to the fixing part. The fixing part includes a fixing part opening, and a light ray is incident on the fixing part opening along a main axis.

[0004] In some embodiments, the first optical element includes a first body, a first opening, a first shielding part, and a first penetrating part. The first opening is formed in the body. The area of the first opening is different from the area of the fixing part opening. The first shielding part is located on the first body and is adjacent to the first opening. The first penetrating part is formed at the edge of the first body and is adjacent to the first opening.

[0005] In some embodiments, the optical element driving mechanism further includes a second optical element, a second moving part, and a second driving component. The second moving part is connected to the second optical element. The second moving part can move relative to the fixing part. The second driving component is used to drive the second moving part to move relative to the fixing part. The second optical element includes a second body, a second shielding part, and a second penetrating part. The second shielding part is located on the second body. The second penetrating part is formed at the edge of the second body.

[0006] In some embodiments, the first moving part can change among a first initial position, a first acting position, and a first shielding position, and the second moving part can change among a second initial position, a second shielding position, and a second acting position, so that the first optical element and the second optical element change among a state where the fixing part opening is completely exposed, a state where the first opening is completely exposed, and a state where the first shielding part shields.

[0007] In some embodiments, the optical element driving mechanism further includes a control unit. The control unit includes a database that stores information about a first initial position, a first acting position, a first blocking position, a second initial position, a second blocking position, and a second acting position. After receiving an instruction, the control unit outputs a first control signal and a second control signal according to the instruction and the database to control the first driving component and the second driving component respectively.

[0008] In some embodiments, the blocking position is located between the first initial position and the first acting position, and the first blocking position is not located at the center point between the first initial position and the first acting position.

[0009] In some embodiments, when the first optical element and the second optical element are in a state where the openings in the fixing part are completely exposed, when observed along the main axis, the first optical element does not overlap with the opening in the fixing part, and the second optical element also does not overlap with the opening in the fixing part.

[0010] In some embodiments, when the first optical element and the second optical element are in a state where the first opening is completely exposed, when observed along the main axis, the first opening is completely located in the opening of the fixing part, and at least part of the opening of the fixing part, the first through part, and the second blocking part overlap.

[0011] In some embodiments, when the first optical element and the second optical element are in a state blocked by the first blocking part, when observed along the main axis, at least part of the opening of the fixing part, the first blocking part, and the second through part overlap.

[0012] In some embodiments, the second optical element further includes a second opening formed in the body, and the area of the second opening is different from the area of the opening in the fixing part. When the first optical element and the second optical element are in a state blocked by the first blocking part, the second opening is completely located in the opening of the fixing part. The opening of the fixing part, the first opening, and the second opening are substantially circular.

[0013] At least one embodiment of the present utility model has the following advantages or technical effects: The first movable part and the first optical element connected thereto can move relative to the fixing part, thereby changing the degree to which the first optical element blocks the opening of the fixing part. The second movable part and the second optical element connected thereto can move relative to the fixing part, thereby changing the degree to which the second optical element blocks the opening of the fixing part. Specifically, the first movable part can change between a first initial position, a first acting position, and a first blocking position, and the second movable part can change between a second initial position, a second blocking position, and a second acting position, so that the first optical element and the second optical element change between a state where the opening of the fixing part is completely exposed, a state where the first opening is completely exposed, and a state blocked by the first blocking part.

[0014] Since light passes through an opening that is generally circular in different states, it is possible to ensure that the generated image has uniform brightness. Moreover, by controlling the first movable part and the second movable part through the first driving component and the second driving component respectively, the states of the first optical element and the second optical element can be accurately controlled. Also, since the first optical element and the second optical element jointly block the opening of the fixed part, the sizes of the first optical element and the second optical element can be reduced to achieve miniaturization of the first optical element and the second optical element, and further achieve miniaturization and light weight of the entire optical element driving mechanism. In addition, since multiple optical elements are not required, the manufacturing process can be simplified and the manufacturing cost can be reduced. Description of the Drawings

[0015] To make the features or advantages of the present utility model more obvious and understandable, some embodiments are specifically cited and described in detail below in conjunction with the accompanying drawings. It should be noted that the various features are not necessarily drawn to scale. In fact, the sizes of the various features may be arbitrarily enlarged or reduced and may be drawn schematically.

[0016] Figure 1 is a perspective view of an optical element driving mechanism according to some embodiments.

[0017] Figure 2 is an exploded view of an optical element driving mechanism according to some embodiments.

[0018] Figure 3 is a sectional view of an optical element driving mechanism according to some embodiments along Figure 1 section line AA.

[0019] Figure 4 is a bottom view schematic diagram of a housing, a first movable part, and a second movable part according to some embodiments.

[0020] Figure 5A and Figure 5B is a schematic diagram of a first optical element and a second optical element according to some embodiments from an opposite perspective in a state where the opening of the fixed part is completely exposed, where Figure 5A the base is omitted.

[0021] Figure 6A and Figure 6B is a schematic diagram of a first optical element and a second optical element according to some embodiments from an opposite perspective in a state where the first opening is completely exposed, where Figure 6A the base is omitted.

[0022] Figure 6C is a Figure 6B schematic diagram with the second optical element omitted.

[0023] Figure 7A and Figure 7BSchematic diagram of a first optical element and a second optical element from the opposite perspective of the first shielding portion shielding state according to some embodiments, where Figure 7A The base is omitted.

[0024] Figure 7C is relatively Figure 7B Schematic diagram with the first optical element omitted.

[0025] The reference numerals are explained as follows:

[0026] 100: Optical element drive mechanism

[0027] 200: Fixed portion

[0028] 210: Housing

[0029] 211: Top opening of the housing

[0030] 212: Bottom opening of the housing

[0031] 213: First accommodation portion

[0032] 214: Second accommodation portion

[0033] 215: First limiting structure

[0034] 216: Second limiting structure

[0035] 220: Base

[0036] 222: Base opening

[0037] 300: First movable portion

[0038] 300B: Bottom surface of the first movable portion

[0039] 300T: Top surface of the first movable portion

[0040] 310: First groove

[0041] 320: First guiding structure

[0042] 330: First connecting structure

[0043] 400: Second movable portion

[0044] 400B: Bottom surface of the second movable portion

[0045] 400T: Top surface of the second movable portion

[0046] 410: Second groove

[0047] 420: Second guiding structure

[0048] 430: Second connecting structure

[0049] 500: First driving component

[0050] 510: First coil

[0051] 520: First magnetic element

[0052] 600: Second driving component

[0053] 610: Second coil

[0054] 620: Second magnetic element

[0055] 700: First optical element

[0056] 710: First body

[0057] 720: First connecting part

[0058] 730: First slit

[0059] 731: Depressed part

[0060] 740: First opening

[0061] 750: First avoiding part

[0062] 760: First blocking part

[0063] 770: First penetrating part

[0064] 800: Second optical element

[0065] 810: Second body

[0066] 820: Second connecting part

[0067] 830: Second slit

[0068] 831: Depressed part

[0069] 840: Second opening

[0070] 850: Second avoiding part

[0071] 860: Second blocking part

[0072] 870: Second penetrating part

[0073] MA: Main axis. Detailed implementation manners

[0074] In this specification, many different embodiments or examples are provided to implement different features of the present utility model. If this specification describes that a first feature is formed "on" or "above" a second feature, it means that embodiments including direct contact between the first feature and the second feature can be included, and embodiments in which additional features are formed between the first feature and the second feature, so that the first feature and the second feature are not in direct contact can also be included.

[0075] Also, in this specification, relative spatial terms may be used to describe the arrangement of each feature. The relative spatial terms are for facilitating the description of the positional relationship of a certain feature relative to other features in the drawings. Except for the orientations shown in the drawings, these spatial terms are intended to include different orientations of the device during use or operation. If the device is turned to a different orientation (rotated 90 degrees or other orientations), the relative spatial terms used herein can also be interpreted in the same way. For example, if the drawing is flipped so that the device is upside down, the feature "above" will become the feature "below".

[0076] In this specification, terms such as "comprising" and "having" are open-ended terms, so they should be interpreted as "including but not limited to...". Therefore, the terms "comprising" and "having" specify the existence of corresponding features, regions, steps, operations, and / or elements, but do not exclude the existence of one or more corresponding features, regions, steps, operations, and / or elements.

[0077] The ordinal numbers in the specification and the claims, such as "first", "second", etc., do not have a sequential relationship, and they are only used to label and distinguish two different features with the same name. Therefore, the first feature referred to in the specification may be called the second feature in the claims. In addition, in different examples of the present utility model, similar and / or corresponding symbols or letters may be used. The use of these similar and / or corresponding symbols or letters is only for simply and clearly describing some embodiments of the present utility model, and does not represent any association between the different embodiments and / or configurations discussed.

[0078] Please first refer to Figures 1 to 3 , to understand an optical element driving mechanism 100. Figure 1 is a perspective view of the optical element driving mechanism 100 according to some embodiments. Figure 2 is an exploded view of the optical element driving mechanism 100 according to some embodiments. Figure 3 is a cross-sectional view of the optical element driving mechanism 100 along the Figure 1 section line AA according to some embodiments. For convenience of description, an axis passing through the center of the optical element driving mechanism 100 is defined as a main axis MA.

[0079] The optical element driving mechanism 100 includes a fixed part 200, a first movable part 300, a second movable part 400, a first driving component 500, a second driving component 600, a first optical element 700, and a second optical element 800. However, the components of the optical element driving mechanism 100 can be increased or decreased according to actual requirements.

[0080] In some embodiments, the fixed part 200 includes a housing 210 and a base 220 arranged along the main axis MA. The housing 210 is connected to the base 220. The space between the housing 210 and the base 220 can accommodate the first movable part 300, the second movable part 400, the first driving component 500, the second driving component 600, the first optical element 700, and the second optical element 800.

[0081] Next, in addition to Figures 1 to 3 please also refer to Figure 4 to understand the housing 210, the first movable part 300, and the second movable part 400. Figure 4 is a bottom view schematic diagram of the housing 210, the first movable part 300, and the second movable part 400 according to some embodiments.

[0082] The housing 210 includes a top opening 211, a bottom opening 212, a first accommodating part 213, a second accommodating part 214, a first limiting structure 215, and a second limiting structure 216. Light can sequentially pass through the top opening 211 and the bottom opening 212 along the main axis MA. That is, light can be incident on the bottom opening 212. In some embodiments, the area of the top opening 211 is different from the area of the bottom opening 212. In some embodiments, the area of the bottom opening 212 is smaller than the area of the top opening 211. In some embodiments, the bottom opening 212 can be defined as the fixed part opening.

[0083] The first accommodating part 213 is used to accommodate the first movable part 300 and the first driving component 500. In some embodiments, the first accommodating part 213 is the range within which the first movable part 300 can move. The second accommodating part 214 is used to accommodate the second movable part 400 and the second driving component 600. In some embodiments, the second accommodating part 214 is the range within which the second movable part 400 can move. In some embodiments, the first accommodating part 213 and the second accommodating part 214 are symmetrically formed, but this is not a limitation.

[0084] The first limiting structure 215 is adjacent to the first accommodating part 213. In some embodiments, the first limiting structure 215 is a protrusion. The second limiting structure 216 is adjacent to the second accommodating part 214. In some embodiments, the second limiting structure 216 is a protrusion. In some embodiments, the first limiting structure 215 and the second limiting structure 216 are symmetrically arranged, but this is not a limitation.

[0085] The base 220 includes a base opening 222. Light can be incident on the base opening 222. In some embodiments, the area of the base opening 222 is substantially the same as the area of the bottom opening 212 of the housing 210. In some embodiments, the base opening 222 can be defined as the fixing part opening. In some embodiments, the smallest one of the base opening 222, the top opening 211 of the housing 210, and the bottom opening 212 of the housing 210 can be defined as the fixing part opening.

[0086] The first movable part 300 includes a top surface 300T, a bottom surface 300B, a first groove 310, two first guiding structures 320, and a first connecting structure 330. The top surface 300T faces the housing 210. The bottom surface 300B faces the base 220. The first groove 310 is recessed relative to the top surface 300T. The first groove 310 can accommodate at least part of the first driving component 500. The first guiding structures 320 protrude relative to the top surface 300T. The first guiding structures 320 can make the movement of the first movable part 300 in the first accommodating part 213 smoother. In some embodiments, the first guiding structures 320 have smooth surfaces. The first connecting structure 330 protrudes relative to the bottom surface 300B. The first connecting structure 330 is connected to the first optical element 700. In some embodiments, the first connecting structure 330 is a protrusion.

[0087] Similarly, the second movable part 400 includes a top surface 400T, a bottom surface 400B, a second groove 410, two second guiding structures 420, and a second connecting structure 430. The top surface 400T faces the housing 210. The bottom surface 400B faces the base 220. The second groove 410 is recessed relative to the top surface 400T. The second groove 410 can accommodate at least part of the second driving component 600. The second guiding structures 420 protrude relative to the top surface 400T. The second guiding structures 420 can make the movement of the second movable part 400 in the second accommodating part 214 smoother. In some embodiments, the second guiding structures 420 have smooth surfaces. The second connecting structure 430 protrudes relative to the bottom surface 400B. The second connecting structure 430 is connected to the second optical element 800. In some embodiments, the second connecting structure 430 is a protrusion.

[0088] Please refer to Figure 2 and Figure 3, to understand the first driving component 500 and the second driving component 600. The first driving component 500 includes a first coil 510 and a first magnetic element 520. Similarly, the second driving component 600 includes a second coil 610 and a second magnetic element 620. The shape and size of the first coil 510 are substantially the same as those of the second coil 610. The shape and size of the first magnetic element 520 are substantially the same as those of the second magnetic element 620.

[0089] The first coil 510 is disposed in the first accommodating portion 213 of the housing 210. As Figure 3 shown, the bottom surface of the first coil 510 is higher than the top surface 300T of the first movable portion 300, so that the first movable portion 300 can move smoothly.

[0090] The first magnetic element 520 is disposed in the first groove 310 of the first movable portion 300. In some embodiments, the shape of the first magnetic element 520 is substantially the same as that of the first groove 310 of the first movable portion 300. In some embodiments, when viewed along the main axis MA, the outer dimension of the first magnetic element 520 is larger than the inner dimension of the first magnetic element 520. The first coil 510 and the first magnetic element 520 can generate magnetic force to drive the first movable portion 300 to move relative to the fixed portion 200. That is, the first driving component 500 is used to drive the first movable portion 300 to move relative to the fixed portion 200. In some embodiments, the first movable portion 300 can rotate clockwise and counterclockwise relative to the fixed portion 200.

[0091] The second coil 610 is disposed in the second accommodating portion 214 of the housing 210. As Figure 3 shown, the bottom surface of the second coil 610 is higher than the top surface 400T of the second movable portion 400, so that the second movable portion 400 can move smoothly.

[0092] The second magnetic element 620 is disposed in the second groove 410 of the second movable portion 400. In some embodiments, the shape of the second magnetic element 620 is substantially the same as that of the second groove 410 of the second movable portion 400. In some embodiments, when viewed along the main axis MA, the outer dimension of the second magnetic element 620 is larger than the inner dimension of the second magnetic element 620. The second coil 610 and the second magnetic element 620 can generate magnetic force to drive the second movable portion 400 to move relative to the fixed portion 200. That is, the second driving component 600 is used to drive the second movable portion 400 to move relative to the fixed portion 200. In some embodiments, the second movable portion 400 can rotate clockwise and counterclockwise relative to the fixed portion 200.

[0093] It should be noted that in Figure 2 and Figure 3In the illustrated embodiment, the first coil 510 and the second coil 610 are disposed on the fixed portion 200, the first magnetic element 520 is disposed on the first movable portion 300, and the second magnetic element 620 is disposed on the second movable portion 400. In such a case, when the first movable portion 300 and the second movable portion 400 move relative to the fixed portion 200, the first magnetic element 520 on the first movable portion 300 and the second magnetic element 620 on the second movable portion 400 also move together, and the optical element driving mechanism 100 can be referred to as a moving magnet type.

[0094] However, the positions of the first coil 510 and the first magnetic element 520 can be exchanged and the positions of the second coil 610 and the second magnetic element 620 can be exchanged, such that the first coil 510 is disposed on the first movable portion 300 and the second coil 610 is disposed on the second movable portion 400. In such a case, when the first movable portion 300 and the second movable portion 400 move relative to the fixed portion 200, the first coil 510 on the first movable portion 300 and the second coil 610 on the second movable portion 400 also move together, and the optical element driving mechanism 100 can be referred to as a moving coil type.

[0095] Moreover, since the first driving assembly 500 and the second driving assembly 600 drive the first movable portion 300 and the second movable portion 400 respectively, and the first movable portion 300 and the second movable portion 400 can move independently, the first movable portion 300 and the second movable portion 400 can be precisely controlled.

[0096] Next, please refer to Figure 2 to understand the first optical element 700 and the second optical element 800. The first optical element 700 is disposed between the first movable portion 300 and the base 220. The first optical element 700 includes a first body 710, a first connecting portion 720, a first slit 730, a first opening 740, a first dodging portion 750, a first shielding portion 760 (labeled in Figure 7B ), and a first penetrating portion 770 (labeled in Figure 6C ). The second optical element 800 is disposed between the second movable portion 400 and the base 220. Similarly, the second optical element 800 includes a second body 810, a second connecting portion 820, a second slit 830, a second opening 840, a second dodging portion 850, a second shielding portion 860 (labeled in Figure 6B ), and a second penetrating portion 870 (labeled in Figure 7C ).

[0097] The first body 710 may have an irregular shape. The size and shape of the first body 710 can be designed according to the size of the housing 210, the size of the base opening 222, and the movement range of the first movable part 300. In some embodiments, the first body 710 is made of SOMA light-shielding material. The first connecting part 720 is formed adjacent to the edge of the first body 710. In some embodiments, the first connecting part 720 is a hole. The first connecting part 720 is connected to the first connecting structure 330 of the first movable part 300. In some embodiments, the first connecting part 720 and the first connecting structure 330 of the first movable part 300 can achieve a close fit. Through the connection between the first connecting part 720 and the first movable part 300, the first movable part 300 can drive the first optical element 700 to move more smoothly.

[0098] The first slit 730 is formed between the first connecting part 720 and the first opening 740. The first slit 730 can be engaged with the first limiting structure 215 of the fixing part 200 to achieve the limiting function. In some embodiments, the first slit 730 includes a recessed part 731. The first opening 740 is formed in the first body 710. In some embodiments, the area of the first opening 740 is different from the area of the fixing part opening (which may be the bottom opening 212 of the housing 210 or the base opening 222 of the base 220). For example, the area of the first opening 740 is smaller than the area of the fixing part opening. The first dodging part 750 is formed at the edge of the first body 710. When the first optical element 700 and the second optical element 800 partially overlap (for example, when the first optical element 700 and the second optical element 800 are in the state of being blocked by the first blocking part to be described later), the first dodging part 750 is used to dodge the second opening 840 to prevent the first optical element 700 from blocking the second opening 840. Figures 7A to 7C the first blocking state to be described), the first dodging part 750 is used to dodge the second opening 840 to avoid the first optical element 700 blocking the second opening 840.

[0099] The first blocking part 760 is located on the first body 710 and is adjacent to the first opening 740. The first blocking part 760 is used to assist in blocking the fixing part opening to prevent the appearance of stray light. The first penetrating part 770 is formed at the edge of the first body 710 and is adjacent to the first opening 740. The first penetrating part 770 is a part through which light can penetrate. In some embodiments, the first penetrating part 770 is an open concave part.

[0100] The second body 810 may have an irregular shape. The size and shape of the second body 810 can be designed according to the size of the housing 210, the size of the base opening 222, and the movement range of the second movable part 400. In some embodiments, the second body 810 is made of SOMA light-shielding material. The second connecting part 820 is formed adjacent to the edge of the second body 810. In some embodiments, the second connecting part 820 is a hole. The second connecting part 820 is connected to the second connecting structure 430 of the second movable part 400. In some embodiments, the second connecting part 820 and the second connecting structure 430 of the second movable part 400 can achieve a tight fit. By connecting the second connecting part 820 with the second movable part 400, the second movable part 400 can drive the second optical element 800 to move more smoothly.

[0101] The second slit 830 is formed between the second connecting part 820 and the second opening 840. The second slit 830 can be engaged with the second limiting structure 216 of the fixing part 200 to achieve the limiting function. In some embodiments, the second slit 830 includes a recessed part 831. The second opening 840 is formed in the second body 810. In some embodiments, the area of the second opening 840 is different from the area of the fixing part opening. For example, the area of the second opening 840 is smaller than the area of the fixing part opening. In some embodiments, the area of the second opening 840 is different from the area of the first opening 740. For example, the area of the second opening 840 is smaller than the area of the first opening 740.

[0102] The second dodging part 850 is formed at the edge of the second body 810. When the first optical element 700 and the second optical element 800 partially overlap (for example, when the first optical element 700 and the second optical element 800 are in a state where a first opening to be described is completely exposed), the second dodging part 850 is used to dodge the first opening 740 to prevent the second optical element 800 from blocking the first opening 740. Figures 6A to 6C When the first optical element 700 and the second optical element 800 partially overlap (for example, when the first optical element 700 and the second optical element 800 are in a state where a first opening to be described is completely exposed), the second dodging part 850 is used to dodge the first opening 740 to prevent the second optical element 800 from blocking the first opening 740.

[0103] In some embodiments, because the area of the second opening 840 is different from the area of the first opening 740, the radius of curvature of the second dodging part 850 that needs to dodge the first opening 740 is different from the radius of curvature of the first dodging part 750 that needs to dodge the second opening 840. In some embodiments, the radius of curvature of the second dodging part 850 can be smaller than the radius of curvature of the first dodging part 750, but not limited thereto.

[0104] The second shielding portion 860 is located on the second body 810 and is adjacent to the second opening 840. The second shielding portion 860 is used to assist in shielding the fixing portion opening to avoid the appearance of stray light. The second through portion 870 is formed on the edge of the second body 810 and is adjacent to the second opening 840. The second through portion 870 is a portion through which light can penetrate. In some embodiments, the second through portion 870 is an open recess.

[0105] The first movable portion 300 is connected to the first optical element 700 and can be driven by the first driving assembly 500, so that the first movable portion 300 and the first optical element 700 connected thereto can move relative to the fixing portion 200, thereby changing the degree to which the first optical element 700 shields the fixing portion opening. Similarly, the second movable portion 400 is connected to the second optical element 800 and can be driven by the second driving assembly 600, so that the second movable portion 400 and the second optical element 800 connected thereto can move relative to the fixing portion 200, thereby changing the degree to which the second optical element 800 shields the fixing portion opening.

[0106] As described above, by the movement of the first movable portion 300 and the movement of the second movable portion 400, the degree to which the first optical element 700 shields the fixing portion opening and the degree to which the second optical element 800 shields the fixing portion opening can be changed, and thus the amount of light passing through can be changed. Specifically, the first movable portion 300 can vary between a first initial position, a first acting position, and a first shielding position, and the second movable portion 400 can vary between a second initial position, a second shielding position, and a second acting position, so that the first optical element 700 and the second optical element 800 vary between a state where the fixing portion opening is completely exposed, a state where the first opening is completely exposed, and a state where the first shielding portion shields.

[0107] The first shielding position is located between the first initial position and the first acting position. In some embodiments, the first shielding position is not at the center point between the first initial position and the first acting position. For example, there may be an angle of ten degrees between the first initial position and the first acting position, and the first shielding position will not be at a position with an angle of five degrees from the first initial position. The second shielding position is located between the second initial position and the second acting position. In some embodiments, the second shielding position is not at the center point between the second initial position and the second acting position. For example, there may be a distance between the second initial position and the second acting position, and the second shielding position will not be at a position that is half of this distance from the first initial position.

[0108] Next, it will be paired with Figure 5A 、 Figure 5B 、 Figure 6A 、 Figure 6B 、 Figure 6C 、 Figure 7A, Figure 7B , Figure 7C Describe how the movement of the first movable part 300 and the movement of the second movable part 400 change the states of the first optical element 700 and the second optical element 800. Figure 5A And Figure 5B Are schematic views of the opposite perspectives of the first optical element 700 and the second optical element 800 in the state where the fixing part opening is completely exposed according to some embodiments, where Figure 5A The base 220 is omitted. Figure 6A And Figure 6B Are schematic views of the opposite perspectives of the first optical element 700 and the second optical element 800 in the state where the first opening is completely exposed according to some embodiments, where Figure 6A The base 220 is omitted. Figure 6C Is a comparison Figure 6B A schematic view omitting the second optical element 800. Figure 7A And Figure 7B Are schematic views of the opposite perspectives of the first optical element 700 and the second optical element 800 in the state where the first shielding part is in a shielding state according to some embodiments, where Figure 7A The base 220 is omitted. Figure 7C Is a comparison Figure 7B A schematic view omitting the first optical element 700.

[0109] As Figure 5A And Figure 5B Shown, the first movable part 300 is in the first initial position, the second movable part 400 is in the second initial position, and the first optical element 700 and the second optical element 800 are in the state where the fixing part opening is completely exposed. When the first optical element 700 and the second optical element 800 are in the state where the fixing part opening is completely exposed, when observed along the main axis MA, the first optical element 700 does not overlap with the fixing part opening, and the second optical element 800 also does not overlap with the fixing part opening, so that the fixing part opening is not blocked by the first optical element 700 and the second optical element 800 and is completely exposed.

[0110] In some embodiments, when the first optical element 700 and the second optical element 800 are in the state where the fixing part opening is completely exposed, the first limiting structure 215 of the housing 210 can contact the edge of the first slit 730 of the first optical element 700, and the second limiting structure 216 of the housing 210 can contact the edge of the second slit 830 of the second optical element 800.

[0111] Moreover, for the entire optical element driving mechanism 100, when the first optical element 700 and the second optical element 800 are in the state where the fixing portion opening is completely exposed, the amount of light passing through depends on the area of the fixing portion opening. In some embodiments, the fixing portion opening is substantially circular. Therefore, when the first optical element 700 and the second optical element 800 are in the state where the fixing portion opening is completely exposed, light can uniformly pass through the circular fixing portion opening to achieve better optical properties.

[0112] In Figures 6A to 6C the illustrated embodiment, the first movable portion 300 is in the first action position, the second movable portion 400 is in the second blocking position, and the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed. Please refer to Figure 6B and Figure 6C . When the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed, the first penetrating portion 770 is the portion of the first optical element 700 that does not block the fixing portion opening, and the second blocking portion 860 can block the first penetrating portion 770 so that light does not pass through the first penetrating portion 770. That is, when the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed, the fixing portion opening, the first penetrating portion 770, and the second blocking portion 860 at least partially overlap. In some embodiments, the area of the second blocking portion 860 is substantially equal to or slightly larger than the area of the first penetrating portion 770.

[0113] In some embodiments, when the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed, when viewed along the main axis MA, the first opening 740 is completely located within the fixing portion opening. In some embodiments, the state where the first opening is completely exposed means that the center of the first opening 740 coincides completely with the center of the fixing portion opening.

[0114] In some embodiments, the first opening 740 is substantially circular. Therefore, when the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed, light can uniformly pass through the circular first opening 740 to make the generated image have better optical properties. If the second optical element 800 is omitted, light will pass through the first opening 740 and the first penetrating portion 770, which may cause the generated image to have uneven brightness.

[0115] In some embodiments, when the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed, the second limiting structure 216 of the housing 210 can be located within the recess 831 of the first slit 830 of the second optical element 800, which can ensure that the second optical element 800 is in the desired position.

[0116] In Figures 7A to 7CIn the illustrated embodiment, the first movable part 300 is in the first shielding position, the second movable part 400 is in the second acting position, and the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields. Please refer to Figure 7B and Figure 7C . When the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields, the second penetrating part 870 is the part of the fixed part opening that the second optical element 800 fails to shield, and the first shielding part 760 can shield the second penetrating part 870 so that light does not pass through the second penetrating part 870. That is, when the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields, the fixed part opening, the first shielding part 760, and the second penetrating part 870 at least partially overlap.

[0117] In some embodiments, when the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields, when viewed along the main axis MA, the second opening 840 is completely located in the fixed part opening. In such a case, the state where the first shielding part shields can also be regarded as the state where the second opening is completely exposed. In some embodiments, the state where the first shielding part shields or the state where the second opening is completely exposed means that the center of the second opening 840 coincides completely with the center of the fixed part opening.

[0118] In some embodiments, the second opening 840 is substantially circular. Therefore, when the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields, light can uniformly pass through the circular second opening 840 so that the generated image has better optical properties. If the first optical element 700 is omitted, light will pass through the second opening 840 and the second penetrating part 870, which may cause the generated image to have uneven brightness. Also, because the area of the second opening 840 is different from the area of the first opening 740, it can be determined whether to expose the first opening 740 or the second opening 840 according to the visual requirements (for example, the desired amount of light passing through).

[0119] In some embodiments, when the first optical element 700 and the second optical element 800 are in the state where the first shielding part shields, the first limiting structure 215 of the housing 210 can be located in the recessed part 731 of the first slit 730 of the first optical element 700, which can ensure that the first optical element 700 is in the desired position.

[0120] In some embodiments, the second optical element 800 may not have the second opening 840. When the first optical element 700 and the second optical element 800 are in the first occlusion state, when observed along the main axis MA, the first optical element 700 and the second optical element 800 completely occlude the fixing portion opening, so that light cannot pass through the fixing portion opening. In such a case, the optical element driving mechanism 100 may have a full aperture (i.e., the fixing portion opening is not occluded) and a full closed aperture (i.e., the fixing portion opening is completely occluded by the first optical element 700 and the second optical element 800), and can be regarded as a shutter mechanism.

[0121] In summary, because the first optical element 700 and the second optical element 800 jointly occlude the fixing portion opening, the sizes of the first optical element 700 and the second optical element 800 can be reduced to achieve miniaturization of the first optical element 700 and the second optical element 800, and further achieve miniaturization and light weight of the entire optical element driving mechanism 100. If a single optical element needs to occlude the entire fixing portion opening, its volume may be large and its weight may be heavy.

[0122] In some embodiments, whether the first optical element 700 and the second optical element 800 are in the state where the first opening is completely exposed or the first occlusion state, the first optical element 700 is located below the second optical element 800. That is, the first optical element 700 is closer to the base 220 than the second optical element 800. That is, when observed along the direction perpendicular to the main axis MA, the first optical element 700 and the second optical element 800 are at different heights. Because the first optical element 700 is located below the second optical element 800, relatively Figure 7B the Figure 7C first optical element 700 is omitted Figure 7B and it is almost impossible to see the difference from

[0123] In some embodiments, the optical element driving mechanism 100 further includes a sensing unit (not shown) and a control unit (not shown). The sensing unit may include a Hall sensor, a Giant Magneto Resistance (GMR) sensor, a Tunneling Magneto Resistance (TMR) sensor, etc. The sensing unit can sense the change in the magnetic field line density and / or the change in the magnetic field line direction of the first magnetic element 520 and the second magnetic element 620 to obtain the positions of the first movable portion 300 and the second movable portion 400. The sensing unit can be used to define the control signal output to the control unit.

[0124] In some embodiments, the control unit is a Driver IC. The control unit includes a database that stores information about a first initial position, a first acting position, a first blocking position, a second initial position, a second blocking position, and a second acting position. After receiving an instruction, the control unit outputs a first control signal and a second control signal according to the instruction and the database to control the first driving component 500 and the second driving component 600 respectively. For example, when the instruction is to require the first optical element 700 and the second optical element 800 to change to a state where the first opening is completely exposed, the first control signal causes the first movable part 300 to move to the first acting position, and the second control signal causes the second movable part 400 to move to the second blocking position.

[0125] In some embodiments, the optical element driving mechanism 100 can be disposed on a lens device to change the amount of light passing through the lens device.

[0126] The present utility model provides an optical element driving mechanism. The optical element driving mechanism includes a fixed part, a first movable part, a second movable part, a first driving component, a second driving component, a first optical element, and a second optical element. The fixed part includes a fixed part opening. The first optical element includes a first opening smaller than the fixed part opening.

[0127] The first movable part is connected to the first optical element and can be driven by the first driving component, so that the first movable part and the first optical element connected thereto can move relative to the fixed part, thereby changing the degree to which the first optical element blocks the fixed part opening. Similarly, the second movable part is connected to the second optical element and can be driven by the second driving component, so that the second movable part and the second optical element connected thereto can move relative to the fixed part, thereby changing the degree to which the second optical element blocks the fixed part opening.

[0128] Specifically, the first movable part can vary between a first initial position, a first acting position, and a first blocking position, and the second movable part can vary between a second initial position, a second blocking position, and a second acting position, so that the first optical element and the second optical element vary between a state where the fixed part opening is completely exposed, a state where the first opening is completely exposed, and a state where the first blocking part blocks.

[0129] Furthermore, the first optical element can include a first blocking part for assisting in blocking the fixed part opening and a first penetrating part for reducing its size, etc. In an embodiment where the second optical element includes a second opening, the first optical element can further include a first avoiding part for avoiding blocking the second opening of the second optical element.

[0130] Since light passes through generally circular openings (such as the fixing part openings described above (which may be the bottom opening 212 of the housing 210 or the base opening 222 of the base 220), the first opening 740, and the second opening 840) in different states, it can ensure that the generated image has uniform brightness. Moreover, by controlling the first movable part and the second movable part respectively through the first driving component and the second driving component, the states of the first optical element and the second optical element can be accurately controlled. Also, since the first optical element and the second optical element jointly block the fixing part opening, the sizes of the first optical element and the second optical element can be reduced to achieve miniaturization of the first optical element and the second optical element, and further achieve miniaturization and light weight of the entire optical element driving mechanism. In addition, since multiple optical elements are not required, the manufacturing process can be simplified and the manufacturing cost can be reduced.

[0131] The features of several embodiments are outlined above, enabling those skilled in the art to better understand various aspects of the present utility model. Those skilled in the art should understand that the present utility model can be easily used as a basis for designing or modifying other processes and structures to achieve the same purpose or have the same effect as the embodiments described herein. Those skilled in the art should understand that such equivalent configurations do not depart from the spirit and scope of the present utility model, and various changes, substitutions, and alterations can be made to the present utility model without departing from the spirit and scope of the present utility model.

Claims

1. An optical element driving mechanism, characterized in that: include: a first optical element; a fixing portion; a first movable portion connected to the first optical element, wherein the first movable portion is movable relative to the fixed portion; and a first driving assembly, used for driving the first movable part to move relative to the fixed part; Wherein, the fixing portion includes a fixing portion opening, and a light is incident on the fixing portion opening along a main axis; Wherein, the first optical element includes a first opening.

2. The optical element driving mechanism according to claim 1, wherein: The first optical element comprises: a first entity; a first shielding portion, located on the first body and adjacent to the first opening; and A first penetration portion formed at an edge of the first body and adjacent to the first opening; The first opening is formed on the first body, and the area of ​​the first opening is different from the area of ​​the fixing portion opening.

3. The optical element driving mechanism according to claim 2, wherein: Also includes: a second optical element; a second movable portion connected to the second optical element, wherein the second movable portion is movable relative to the fixed portion; and a second driving assembly, used for driving the second movable part to move relative to the fixed part; Wherein, the second optical element comprises: a second entity; A second shielding portion, located on the second body; and A second penetration portion is formed at the edge of the second body.

4. The optical element driving mechanism according to claim 3, wherein: The first movable part can change between a first initial position, a first action position, and a first shielding position, and the second movable part can change between a second initial position, a second shielding position, and a second action position, so that the first optical element and the second optical element can change between a fixed part opening fully exposed state, a first opening fully exposed state, and a first shielding part shielding state.

5. The optical element driving mechanism according to claim 4, characterized in that: It also includes a control unit, wherein the control unit includes a database, which stores information about the first initial position, the first action position, the first shielding position, the second initial position, the second shielding position, and the second action position. After receiving an instruction, the control unit outputs a first control signal and a second control signal according to the instruction and the database to control the first drive component and the second drive component respectively.

6. The optical element driving mechanism according to claim 4, characterized in that: The first shielding position is located between the first initial position and the first action position, and the first shielding position is not located at a center point between the first initial position and the first action position.

7. The optical element driving mechanism according to claim 4, characterized in that: When the first optical element and the second optical element are fully exposed in the fixing portion opening, when observed along the main axis, the first optical element does not overlap with the fixing portion opening, and the second optical element does not overlap with the fixing portion opening.

8. The optical element driving mechanism according to claim 4, characterized in that: When the first optical element and the second optical element are fully exposed in the first opening, when observed along the main axis, the first opening is completely located in the fixing portion opening, and the fixing portion opening, the first penetrating portion, and the second shielding portion at least partially overlap.

9. The optical element driving mechanism according to claim 4, characterized in that: When the first optical element and the second optical element are in the shielding state of the first shielding portion, when observed along the main axis, the fixing portion opening, the first shielding portion, and the second penetrating portion at least partially overlap.

10. The optical element driving mechanism according to claim 9, wherein: The second optical element also includes a second opening, which is formed in the second body, and the area of ​​the second opening is different from the area of ​​the opening of the fixing part, wherein when the first optical element and the second optical element are in the shielding state of the first shielding part, the second opening is completely located in the opening of the fixing part, wherein the opening of the fixing part, the first opening, and the second opening are circular.

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