CN113296336B - Camera module and electronic equipment - Google Patents

Camera module and electronic equipment Download PDF

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Publication number
CN113296336B
CN113296336B CN202110555220.0A CN202110555220A CN113296336B CN 113296336 B CN113296336 B CN 113296336B CN 202110555220 A CN202110555220 A CN 202110555220A CN 113296336 B CN113296336 B CN 113296336B
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China
Prior art keywords
barrel
camera module
assembly
lens
lens barrel
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CN202110555220.0A
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Chinese (zh)
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CN113296336A (en
Inventor
张凯朋
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Priority to CN202110555220.0A priority Critical patent/CN113296336B/en
Publication of CN113296336A publication Critical patent/CN113296336A/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
    • G02B7/182—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors
    • G02B7/1821—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for mirrors for rotating or oscillating mirrors
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
    • G03B13/32—Means for focusing
    • G03B13/34—Power focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Studio Devices (AREA)

Abstract

The application provides a camera module and electronic equipment. The camera module comprises a lens barrel assembly, a reflecting assembly and a first driving assembly. The lens barrel assembly comprises a first lens barrel and a second lens barrel which are connected in a sliding mode. The reflection assembly comprises a first reflection mirror and a second reflection mirror, the first reflection mirror is arranged in the first lens cone, the second reflection mirror is arranged in the second lens cone, the first reflection mirror and the second reflection mirror are oppositely arranged along the direction of an optical axis, and the first reflection mirror and the second reflection mirror are used for reflecting light of an object side to an image side. The first driving assembly is connected with the first lens barrel and/or the second lens barrel and used for driving the first lens barrel and the second lens barrel to move relatively so as to adjust the distance between the first reflecting mirror and the second reflecting mirror. The electronic equipment comprises a display screen and the camera module. The application provides a camera module and electronic equipment's whole size and system focus are adjustable.

Description

Camera module and electronic equipment
Technical Field
The application relates to the technical field of imaging, in particular to a camera module and electronic equipment.
Background
The length of the focal length of the optical lens in the camera module determines the size of the shot image, the size of the field angle, the size of the depth of field, the perspective strength of the picture and the like. However, the length of the conventional optical lens is increased along with the increase of the focal length, which results in the increase of the overall size of the camera module, and is difficult to be applied to the electronic device with a limited internal space.
Disclosure of Invention
The application provides a camera module and electronic equipment with adjustable overall size and system focal length.
In one aspect, the present application provides a camera module, including:
a lens barrel assembly including a first lens barrel and a second lens barrel slidably connected;
the reflection assembly comprises a first reflection mirror and a second reflection mirror, the first reflection mirror is arranged in the first lens barrel, the second reflection mirror is arranged in the second lens barrel, the first reflection mirror and the second reflection mirror are oppositely arranged along the optical axis direction, the reflection surface of the first reflection mirror faces to the image side, the reflection surface of the second reflection mirror faces to the object side, and the first reflection mirror and the second reflection mirror are used for reflecting light rays at the object side to the image side; and
the first driving assembly is connected with the first lens barrel and/or the second lens barrel and used for driving the first lens barrel and the second lens barrel to move relatively so as to adjust the distance between the first reflecting mirror and the second reflecting mirror.
On the other hand, this application still provides an electronic equipment, including the display screen and the camera module, the display screen with the camera module electricity is connected, the display screen is used for showing the image that camera module shot.
The camera module provided by the application is characterized in that the first lens barrel is sleeved outside the second lens barrel and is in sliding connection with the second lens barrel, so that the first lens barrel and the second lens barrel are driven to move relatively by the first driving assembly, the second lens barrel is compressed in the first lens barrel, and the overall size of the camera module can be reduced. In addition, the light of the object side is reflected to the image side through the first reflecting mirror and the second reflecting mirror, so that the first reflecting mirror is arranged in the first lens barrel, the second reflecting mirror is arranged in the second lens barrel, when the first lens barrel and the second lens barrel move relatively under the action of the first driving assembly, the distance between the first reflecting mirror and the second reflecting mirror is changed, and the focal length of the camera module can be adjusted by changing the light path.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below.
Fig. 1 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure;
FIG. 2 is an exploded view of the electronic device of FIG. 1;
FIG. 3 is a side schematic view of the electronic device of FIG. 1;
FIG. 4 is a schematic plan view of a camera module of the electronic device shown in FIG. 1;
FIG. 5 is another side schematic view of the electronic device of FIG. 1;
FIG. 6 is a schematic plan view of the camera module of FIG. 4 including a lens barrel assembly, a reflector assembly and a first drive assembly;
FIG. 7 is a schematic plan view of a reflector assembly including a first reflector and a second reflector of the camera module of FIG. 6;
fig. 8 is a schematic plan view of a first driving assembly including a driving motor, a guide rod and a rotating shaft in the camera module shown in fig. 6;
FIG. 9 is a schematic plan view of the camera module of FIG. 8 further including a detection assembly and a control assembly;
FIG. 10 is a schematic plan view of the detecting assembly including the light detecting element, the blocking plate and the light emitting element in the camera module of FIG. 9;
fig. 11 is a schematic plan view of the camera module of fig. 10 further including an image sensor;
FIG. 12 is a schematic plan view of the camera module of FIG. 4 further including a second drive assembly;
fig. 13 is a schematic plan view of the camera module of fig. 4 further including a lens assembly.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The embodiments listed in this application can be appropriately combined with each other.
As shown in fig. 1, fig. 1 is a schematic structural diagram of an electronic device 100 according to an embodiment of the present disclosure. The electronic device 100 may be a mobile terminal, an automobile, an unmanned aerial vehicle, a robot, security, AR, or other device having an imaging function. The embodiment of the application takes a mobile phone as an example.
The electronic apparatus 100 includes a camera module 1 and a display screen 2. The display screen 2 is electrically connected with the camera module 1. The display screen 2 is used for displaying images shot by the camera module 1.
In one embodiment, as shown in fig. 2, the electronic device 100 further includes a motherboard 4. The display screen 2 and the camera module 1 are electrically connected to the main board 4. Mainboard 4 is used for transmitting the image transmission that camera module 1 shot to display screen 2.
As shown in fig. 2, the electronic device 100 further includes a housing 3. Specifically, the housing 3 includes a center frame 31 and a back plate 32. The middle frame 31 and the back plate 32 may be integrally formed or connected together. The display screen 2 is connected to the side of the middle frame 31 opposite to the back plate 32. The display 2, the middle frame 31 and the back plate 32 form a receiving space 33 therebetween.
Referring to fig. 2 and 3, the camera module 1 is at least partially accommodated in the accommodating space 33. Optionally, the camera module 1 is a rear camera module. The camera module 1 is partially accommodated in the accommodating space 33, and the other part extends out through the back plate 32. In other words, the camera module 1 at least partially protrudes out of the back plate 32. Wherein, the camera module 1 can be fixed on the main board 4. Through accomodating camera module 1 part in accommodating space 33, another part stretches out through backplate 32, adjustable camera module 1 is for the convex height of backplate 32 so that camera module 1's focus is adjustable, can also be through reducing camera module 1 for the convex height of backplate 32 in order to protect camera module 1, improve electronic equipment 100's frivolousness and portability to and through increasing camera module 1 and for the convex height realization long focus of backplate 32 and shoot.
Referring to fig. 3 and 4, the camera module 1 includes a lens barrel assembly 10, a reflective assembly 11 disposed in the lens barrel assembly 10, and a first driving assembly 12 disposed in the accommodating space 33.
The lens barrel assembly 10 includes a first lens barrel 101 and a second lens barrel 102 slidably coupled. The lens barrel assembly 10 may protrude entirely or partially outside the electronic device 100. The first barrel 101 and the second barrel 102 may be cylindrical barrels, cubic barrels, or the like. The first barrel 101 may be movable relative to the second barrel 102 and/or the second barrel 102 may be movable relative to the first barrel 101. It can be understood that the sliding connection between the first barrel 101 and the second barrel 102 includes the first barrel 101 being stationary with respect to the back plate 32 and the second barrel 102 being slidable with respect to the first barrel 101; alternatively, the second barrel 102 is stationary relative to the back plate 32, and the first barrel 101 can slide relative to the second barrel 102; still alternatively, both the first barrel 101 and the second barrel 102 can move relative to the back plate 32. In the following embodiments, the second barrel 102 is stationary relative to the back plate 32, and the first barrel 101 can slide relative to the second barrel 102.
In one embodiment, the second barrel 102 is fixedly connected to the back plate 32, and part or all of the second barrel 102 protrudes relative to the back plate 32. The first barrel 101 is retractable in the optical axis direction with respect to the second barrel 102. When the first barrel 101 extends relative to the second barrel 102, the first barrel 101 is at least partially located on a side of the second barrel 102 facing away from the display screen 2. When the first barrel 101 is retracted relative to the second barrel 102, the first barrel 101 surrounds the second barrel 102. In this embodiment, the diameter of the first barrel 101 is larger than that of the second barrel 102. The inner surface of the first barrel 101 and the outer surface of the second barrel 102 may be in direct contact or in clearance fit.
In another embodiment, as shown in fig. 5, the second barrel 102 is fixedly connected to the back plate 32, and part or all of the second barrel 102 protrudes relative to the back plate 32. The first barrel 101 is retractable in the optical axis direction with respect to the second barrel 102. When the first barrel 101 extends relative to the second barrel 102, the first barrel 101 is at least partially located on a side of the second barrel 102 facing away from the display screen 2. When the first barrel 101 is retracted relative to the second barrel 102, the first barrel 101 is accommodated in the second barrel 102. In this embodiment, the diameter of the second barrel 102 is larger than that of the first barrel 101. The inner surface of the second barrel 102 may be in direct contact with the outer surface of the first barrel 101 or may be in clearance fit with the outer surface.
It can be understood that, in the above embodiment, the second barrel 102 is fixedly connected to the back plate 32, and a portion of the second barrel protrudes from the back plate 32, so that the accommodating space 33 in the electronic apparatus 100 occupied by the camera module 1 can be reduced, and therefore, the arrangement of other electronic devices in the electronic apparatus 100 and the thinning development of the electronic apparatus 100 are facilitated.
In the following embodiments, the diameter of the first barrel 101 is larger than that of the second barrel 102 without specific description, that is, when the first barrel 101 extends relative to the second barrel 102, the first barrel 101 is at least partially located on a side of the second barrel 102 facing away from the display screen 2; when the first barrel 101 retracts relative to the second barrel 102, the first barrel 101 surrounds the second barrel 102.
As shown in fig. 6, the reflection assembly 11 includes a first reflection mirror 110 and a second reflection mirror 112. The first mirror 110 and the second mirror 112 may be total reflection mirrors or half-reflection mirrors. The first reflecting mirror 110 is provided in the first barrel 101. In one embodiment, the camera module 1 further includes a glass cover plate 113. The glass cover 113 is disposed at an end of the first barrel 101 away from the display screen 2 (refer to fig. 3), and an outer edge of the glass cover 113 is connected to the first barrel 101. The first reflector 110 is disposed on a side of the glass cover plate 113 facing the display screen 2. Optionally, the first reflector 110 is integrally bonded to the glass cover plate 113. Of course, in other embodiments, the first reflector 110 may be molded directly onto the glass cover plate 113. The second reflector 112 is disposed in the second barrel 102. Optionally, the second mirror 112 is located between the first mirror 110 and the display screen 2. In one embodiment, the outer edge of the second reflector 112 is attached to the inner surface of the second barrel 102. The first reflecting mirror 110 and the second reflecting mirror 112 are disposed opposite to each other in the optical axis direction. Wherein the optical axis can be referred to the line M in the corresponding figures. In the embodiment of the present application, the first reflector 110 and the second reflector 112 are coaxially disposed, and the geometric central axis of the first reflector 110, the geometric central axis of the second reflector 112, and the optical axis are collinear.
The distance between the first reflecting mirror 110 and the second reflecting mirror 112 when the first barrel 101 is extended is greater than the distance between the first reflecting mirror 110 and the second reflecting mirror 112 when the first barrel 101 is retracted. The distance between the first reflector 110 and the second reflector 112 corresponds to the focal length of the camera module 1. In other words, the focus control of the camera module 1 can be achieved by controlling the amount of extension of the first barrel 101 with respect to the second barrel 102.
As shown in fig. 7, the first reflector 110 and the second reflector 112 are used for reflecting the light from the object side to the image side. Specifically, the first reflecting mirror 110 has a first reflecting surface 110a. The second reflecting mirror 112 has a second reflecting surface 112a. The first reflective surface 110a faces the image side. The second reflective surface 112a is disposed opposite to the first reflective surface 110a, in other words, the second reflective surface 112a faces the object side. The second reflective surface 112a receives the incident light from the object side and reflects the received incident light to the first reflective surface 110a. The first reflective surface 110a receives the light reflected by the second reflective surface 112a and reflects the received light to the second reflective surface 112a or the image side. In other words, the incident light on the object side may reach the image side after one or more reflections between the first reflective surface 110a and the second reflective surface 112a. Here, the object side can be understood as the side of the object shot by the camera module 1. The image side may be understood as the side of the second mirror 112 facing away from the first mirror 110.
Alternatively, the area of the orthographic projection of the second mirror 112 in the optical axis direction is larger than the area of the orthographic projection of the first mirror 110 in the optical axis direction. In other words, the size of the second mirror 112 is larger than the size of the first mirror 110. The area of the orthographic projection of the second reflecting mirror 112 in the optical axis direction is the area of the orthographic projection of the first reflecting mirror 110 in the optical axis direction, so that the efficiency of the second reflecting mirror 112 in receiving light can be improved, and the entrance pupil diameter of the camera module 1 can be increased when the second reflecting mirror 112 is large, thereby improving the light entering amount of the camera module 1.
By arranging the first reflecting mirror 110 and the second reflecting mirror 112, the light on the object side is reflected once or more between the first reflecting mirror 110 and the second reflecting mirror 112 to reach the image side, the path of the incident light can be prolonged, the space between the first reflecting mirror 110 and the second reflecting mirror 112 can be multiplexed, and the axial size of the camera module 1 is reduced while the imaging quality is ensured.
The first reflective surface 110a and the second reflective surface 112a may be one of a plane, a spherical surface, or an aspheric surface. In the embodiment of the present application, the first reflective surface 110a and the second reflective surface 112a are both aspheric. For example: the first reflective surface 110a and the second reflective surface 112a are quadric surfaces. Since the aspheric surface has a high degree of freedom, the first reflecting surface 110a and the second reflecting surface 112a are designed to be aspheric surfaces, and the axial size of the camera module 1 can be further reduced by optimizing the parameters of the aspheric surface to reduce the thickness of the first reflecting mirror 110, the thickness of the second reflecting mirror 112, or the distance between the first reflecting mirror 110 and the second reflecting mirror 112.
As shown in fig. 8, the first driving assembly 12 is connected to the first barrel 101 and/or the second barrel 102. The first driving assembly 12 is used for driving the first barrel 101 and the second barrel 102 to move relatively to adjust the distance between the first reflector 110 and the second reflector 112. The first driving assembly 12 is connected to the first barrel 101 and/or the second barrel 102, the first driving assembly 12 is used for driving the first barrel 101 and the second barrel 102 to move relatively, the first driving assembly 12 is connected to the first barrel 101, and the first driving assembly 12 is used for driving the first barrel 101 to move; or, the first driving assembly 12 is connected to the second barrel 102, and the first driving assembly 12 is used for driving the second barrel 102 to move; still alternatively, the first driving assembly 12 is connected to the first barrel 101 and the second barrel 102, and the first driving assembly 12 is used for driving the first barrel 101 and the second barrel 102 to move.
In one embodiment, the first driving assembly 12 is disposed on a side of the first barrel 101 away from the second barrel 102, the first driving assembly 12 is connected to the first barrel 101, and the first driving assembly 12 is used for driving the first barrel 101 to extend or retract. The first barrel 101 and the second barrel 102 are aligned in the optical axis direction when the first barrel 101 is extended. When the first barrel 101 is retracted, the first barrel 101 surrounds the second barrel 102. Of course, in other embodiments, the first driving assembly 12 may also be disposed between the first barrel 101 and the second barrel 102, or disposed on a side of the second barrel 102 facing away from the first barrel 101. In this embodiment, when the first barrel 101 retracts relative to the second barrel 102, the first barrel 101 surrounds the second barrel 102, so that the first driving assembly 12 is disposed on a side of the first barrel 101 away from the second barrel 102, which can avoid the first driving assembly 12 from shielding light, thereby improving the imaging quality of the camera module 1, and in addition, the compactness of the barrel assembly 10 can be improved, and the radial size of the barrel assembly 10 can be reduced.
In the camera module 1 provided by the present application, the first barrel 101 is sleeved outside the second barrel 102, and the first barrel 101 is slidably connected to the second barrel 102, so that the first driving assembly 12 drives the first barrel 101 and the second barrel 102 to move relatively, so that the second barrel 102 is compressed in the first barrel 101, and the overall size of the camera module 1 can be reduced. In addition, the light from the object side is reflected to the image side by the first reflector 110 and the second reflector 112, so that the first reflector 110 is disposed in the first barrel 101, the second reflector 112 is disposed in the second barrel 102, when the first barrel 101 and the second barrel 102 move relatively under the action of the first driving assembly 12, the distance between the first reflector 110 and the second reflector 112 changes, and the focal length of the camera module 1 can be adjusted by changing the light path.
As shown in fig. 8, the first driving assembly 12 includes a driving motor 120, a guide rod 121, and a connecting member 122. One end of the connecting member 122 is connected to the first barrel 101, and the other end of the connecting member 122 is movably connected to the guide rod 121. The driving motor 120 is used for driving the guide rod 121 to rotate so as to drive the connecting member 122 to move along the guide rod 121, and the first barrel 101 is driven to move relative to the second barrel 102 when the connecting member 122 moves.
In one embodiment, the guide rods 121 extend in the optical axis direction. One end of the connecting member 122 is fixed to the outer surface of the first barrel 101. The other end of the connecting member 122 is inserted into the guide rod 121. Optionally, the connecting member 122 is a movable nut. The driving motor 120 directly drives the guide rod 121 to rotate, or the driving motor 120 transmits a rotating force to the guide rod 121 through the transmission structure 123 to drive the guide rod 121 to rotate. In this embodiment, the driving motor 120 is connected to the guide rod 121 through the transmission structure 123. The drive mechanism 123 may be a gear drive mechanism, a worm gear drive mechanism, a chain drive mechanism, or the like. The transmission structure 123 is arranged between the driving motor 120 and the guide rod 121, so that the limitation on the arrangement positions of the driving motor 120 and the guide rod 121 can be reduced, the layout difficulty of the first driving assembly 12 in the electronic device 100 can be reduced, the stability of the rotation of the guide rod 121 can be improved, the first lens barrel 101 can stably extend or retract under the driving of the connecting piece 122, and the blockage of the first lens barrel 101 in the telescopic process can be reduced.
Further, as shown in fig. 9, the camera module 1 further includes a detection component 13 and a control component 14 electrically connected to each other. The detection component 13 is configured to detect whether the first barrel 101 is in a retracted state, the control component 14 is configured to receive an extension instruction and control the driving motor 120 to rotate in a first direction to drive the first barrel 101 to extend if a detection result of the detection component 13 is yes, or the detection component 13 is configured to detect whether the first barrel 101 is in an extended state, and the control component 14 is configured to receive a retraction instruction and control the driving motor 120 to rotate in a second direction to drive the first barrel 101 to retract if a detection result of the detection component 13 is yes, where the first direction is opposite to the second direction.
In an embodiment, the detecting component 13 is configured to detect whether the first barrel 101 is in the retracted state, and the control component 14 is configured to receive the extending instruction and control the driving motor 120 to rotate in the first direction to drive the first barrel 101 to extend when the detection result obtained by the detecting component 13 is positive. Specifically, the detection unit 13 detects whether the first barrel 101 is in the retracted state after receiving the detection instruction. Wherein the detection instructions can be sent by the control component 14 to the detection component 13. When the detection component 13 detects that the first barrel 101 is in the retracted state, a yes detection result is sent to the control component 14. When the detection unit 13 detects that the first barrel 101 is not in the retracted state, a no detection result or no detection result is sent to the control unit 14. When the control component 14 receives the extension instruction and the detection result sent by the detection component 13 is yes, it controls the driving motor 120 to rotate in the first direction to drive the first lens barrel 101 to extend. When the control component 14 receives the extension instruction and the detection result sent by the detection component 13 as no or does not receive the detection result sent by the detection component 13, it controls the driving motor 120 to stop rotating or controls the driving motor 120 to keep the original state. The extending instruction received by the control component 14 may be an instruction of the user to open the camera.
In another embodiment, the detecting component 13 is configured to detect whether the first barrel 101 is in the extended state, and the control component 14 is configured to receive the retraction instruction and control the driving motor 120 to rotate in the second direction to drive the first barrel 101 to retract when the detection result obtained by the detecting component 13 is positive. Specifically, the detection component 13 detects whether the first barrel 101 is in the extended state after receiving the detection instruction. Wherein the detection instructions can be sent by the control component 14 to the detection component 13. When the detection component 13 detects that the first barrel 101 is in the extended state, a yes detection result is sent to the control component 14. When the detection unit 13 detects that the first barrel 101 is not in the extended state, a no detection result or no detection result is sent to the control unit 14. When the control component 14 receives the retraction instruction and the detection result sent by the detection component 13 is yes, it controls the driving motor 120 to rotate in the second direction to retract the first lens barrel 101. When the control component 14 receives the retraction instruction and the detection result sent by the detection component 13 as no or does not receive the detection result sent by the detection component 13, it controls the driving motor 120 to stop rotating or controls the driving motor 120 to keep the original state. The retraction instruction received by the control component 14 may be, among other things, an instruction for the user to exit or turn off the camera.
By arranging the detection component 13 and the control component 14, the first lens barrel 101 in the camera module 1 can be extended or retracted according to the operation of the user on the electronic device 100, so that the size of the camera module 1 in a non-shooting state and the focal length adjustment of the camera module 1 are reduced, and the extension and retraction of the camera module 1 and the automation of the focal length adjustment are realized. The focus adjustment of the camera module 1 can be realized by adjusting the extending amount of the first lens barrel 101 by the control component 14 according to the focus in actual shooting.
Optionally, as shown in fig. 10, the detecting assembly 13 includes a light detecting member 131, a baffle 132 and a light emitting member 133. Wherein the light detecting member 131 may be a photo detector. The baffle 132 is provided on the outer surface of the first barrel 101. Optionally, the baffle 132 is adhered to the first barrel 101 or the baffle 132 is clamped to the first barrel 101. The light emitting member 133 is disposed opposite to and spaced apart from the light detecting member 131. Specifically, the light emitting element 133 and the light detecting element 131 are disposed opposite to each other and spaced apart from each other in a plane perpendicular to the optical axis. The light emitting member 133 serves to emit light toward the light detecting member 131. The light detecting member 131 is for receiving light emitted from the light emitting member 133. When the first barrel 101 is in the extended state, the baffle 132 is located on the side of the light detecting element 131 and the light emitting element 133 facing the object side. It can be understood that when the first barrel 101 is in the extended state, there is no shielding between the light detecting member 131 and the light emitting member 133, and the light detecting member 131 can receive the light emitted from the light emitting member 133. When the first barrel 101 is in the retracted state, the shutter 132 is located between the light emitting member 133 and the light detecting member 131. It is understood that when the first barrel 101 is in the retracted state, the light emitted from the light emitting member 133 is blocked by the shutter 132, so that the light detecting member 131 cannot receive the light emitted from the light emitting member 133. When the light detecting member 131 can receive the light emitted from the light emitting member 133, the detecting assembly 13 detects that the first barrel 101 is in the extended state. In this embodiment, the light detector 131, the shutter 132, and the light emitter 133 are used to detect the extension and retraction of the first barrel 101, and the first barrel has a simple structure and high reliability. In addition, the detection component 13 is disposed on the outer surface of the first barrel 101 to avoid the influence on the light inside the first barrel 101.
Further, as shown in fig. 11, the camera module 1 further includes an image sensor 15. The image sensor 15 is arranged on the side of the second mirror 112 facing away from the first mirror 110. The image sensor 15 is configured to receive the light reflected by the first reflecting surface 110a of the first reflecting mirror 110 and perform photoelectric conversion. The light-sensitive surface of the image sensor 15 for receiving light forms the image side. Among them, the image sensor 15 may be a solid-state image sensor 15, such as: a Charge Coupled Device (CCD), a Metal-Oxide Semiconductor (CMOS), and the like.
Alternatively, the area of the orthogonal projection of the second mirror 112 in the optical axis direction is larger than the area of the orthogonal projection of the image sensor 15 in the optical axis direction. In other words, the size of the second reflecting surface 112a of the second reflecting mirror 112 is greater than or equal to the size of the photosensitive surface of the image sensor 15. The entrance pupil diameter of the camera module 1 can be effectively increased by making the size of the second reflecting surface 112a of the second reflecting mirror 112 larger than the size of the light sensing surface of the image sensor 15, so that the amount of light entering can be increased. Meanwhile, the size of the second mirror 112 with a large aperture increases the entrance pupil diameter of the system, so that the minimum resolution is reduced, that is, the minimum angle that the system can resolve is reduced, the angular resolution is improved, and the imaging quality of the lens is improved.
Further, as shown in fig. 12, the camera module 1 further includes a second driving assembly 16. The second driving assembly 16 is connected to the lens barrel assembly 10 and/or the image sensor 15. The second driving assembly 16 is used for driving the lens barrel assembly 10 and the image sensor 15 to move relatively to change the distance between the lens barrel assembly 10 and the image sensor 15. It is to be understood that the second drive assembly 16 being coupled to the lens barrel assembly 10 and/or the image sensor 15 includes the second drive assembly 16 being coupled to the lens barrel assembly 10; alternatively, the second driving assembly 16 is connected to the image sensor 15; still alternatively, the second driving assembly 16 connects the lens barrel assembly 10 and the image sensor 15.
The present embodiment exemplifies that the second driving assembly 16 is connected to the lens barrel assembly 10, and the second driving assembly 16 drives the movement of the lens barrel assembly 10 with respect to the image sensor 15. Optionally, the second drive assembly 16 is a voice coil motor. The second lens barrel 102 of the lens barrel assembly 10 is movably connected with the second driving assembly 16. The second barrel 102 is movable in the optical axis direction by the magnetic field force of the second driving assembly 16 to move the barrel assembly 10 (including the first barrel 101 and the second barrel 102) relative to the image sensor 15.
Referring to fig. 11 and 12, the second driving assembly 16 and the first driving assembly 12 in the above embodiments may be driven simultaneously or separately. In one embodiment, when the first barrel 101 needs to be extended or retracted, the first barrel 101 is driven by the first driving assembly 12; when it is required to integrally extend or retract the lens barrel assembly 10, the lens barrel assembly 10 is driven by the second drive assembly 16. In an application scenario, after the second driving assembly 16 drives the lens barrel assembly 10 to extend integrally relative to the image sensor 15, the first driving assembly 12 drives the first lens barrel 101 to extend relative to the second lens barrel 102, so as to realize telephoto shooting.
Alternatively, as shown in fig. 13, the second reflecting mirror 112 is provided with a through hole 112b. The through hole 112b may be disposed at any position of the second reflector 112. In one embodiment, the through hole 112b is disposed between the geometric center axis of the second reflector 112 and the outer edge of the second reflector 112. In another embodiment, the through hole 112b is formed in the center of the second reflector 112. In other words, the geometric center of the through-hole 112b coincides with the geometric center of the second mirror 112. In the embodiment of the present application, the through hole 112b is disposed at the center of the second reflector 112, and the through hole 112b extends along the optical axis direction of the lens. It is understood that the through hole 112b penetrates the second reflecting mirror 112 in the optical axis direction of the lens.
Further, as shown in fig. 13, the camera module 1 further includes a lens assembly 17, the lens assembly 17 is disposed in the through hole 112b, and the lens assembly 17 and the first reflector 110 are disposed opposite to each other along the optical axis direction. The lens assembly 17 is used for receiving the light reflected by the first reflector 110 and refracting the received light to the image side. Through locating lens subassembly 17 in the through-hole 112b of second mirror 112 for the whole size of camera module 1 further compresses, thereby can realize the miniaturization of camera module 1, promote the compactedness of camera module 1 structure.
In one embodiment, the first reflector 110, the second reflector 112 and the lens assembly 17 are coaxially disposed. It will be appreciated that the geometric central axis of the first mirror 110, the geometric central axis of the second mirror 112, and the geometric central axis of the lens assembly 17 are collinear. By arranging the first reflector 110, the second reflector 112 and the lens assembly 17 coaxially, the efficiency of reflecting and receiving light rays among the first reflector 110, the second reflector 112 and the lens assembly 17 is improved. The lens assembly 17 may include one or more lenses, among others. The number of lenses is not limited in the present application.
In one embodiment, the lens assembly 17 includes a first lens 170 and a second lens 171 arranged in order from an object side to an image side along an optical axis. The first lens element 170 and the second lens element 171 both have negative refractive power. The first lens element 170 and the second lens element 171 both have negative refractive power, which means that the first lens element 170 and the second lens element 171 both have a light-diverging effect. The first lens 170 and the second lens 171 form a telecentric system, so that the physical focal length of the camera module 1 is increased. The object plane of the first lens 170 and the image plane of the first lens 170 may be one of a plane, a spherical surface, and an aspherical surface. The object plane of the second lens 171 and the image plane of the second lens 171 may be one of a plane, a spherical surface, and an aspherical surface. The object plane of the first lens 170 may be understood as an outer surface of the first lens 170 facing the object side. The image plane of the first lens 170 may be understood as an outer surface of the first lens 170 facing the image side. The object plane of the second lens 171 can be understood as an outer surface of the second lens 171 facing the object side. The image plane of the second lens 171 can be understood as the outer surface of the second lens 171 facing the image side. Optionally, an object plane of the first lens element 170, an object plane of the second lens element 171, an image plane of the first lens element 170, and an image plane of the second lens element 171 are all quadric surfaces.
Through setting up lens subassembly 17 transmission first speculum 110 reflected light to image sensor 15, can rectify camera module 1's aberration, lens subassembly 17 can compensate the high order aberration that camera module 1 exists promptly to improve image quality.
The foregoing are some embodiments of the present application, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present application, and these modifications and decorations are also regarded as the scope of protection of the present application.

Claims (9)

1. The utility model provides a camera module which characterized in that includes:
an image sensor;
a lens barrel assembly including a first lens barrel and a second lens barrel slidably connected;
the reflection assembly comprises a first reflection mirror and a second reflection mirror, the first reflection mirror is arranged in the first lens barrel, the second reflection mirror is arranged in the second lens barrel, the first reflection mirror and the second reflection mirror are oppositely arranged along the optical axis direction, the reflection surface of the first reflection mirror faces to an image side, the reflection surface of the second reflection mirror faces to an object side, and the first reflection mirror and the second reflection mirror are used for reflecting light rays at the object side to the image side;
the first driving assembly is connected with the first lens barrel and/or the second lens barrel and is used for driving the first lens barrel and the second lens barrel to move relatively so as to adjust the distance between the first reflecting mirror and the second reflecting mirror; and
the second driving assembly is connected with the lens barrel assembly and/or the image sensor and used for driving the whole lens barrel assembly to move relative to the image sensor so as to change the distance between the whole lens barrel assembly and the image sensor.
2. The camera module according to claim 1, wherein the first driving assembly is connected to the first barrel, and the first driving assembly is disposed on a side of the first barrel away from the second barrel, the first driving assembly is configured to drive the first barrel to extend or retract relative to the second barrel, when the first barrel extends, the first barrel and the second barrel are arranged along an optical axis, and when the first barrel retracts, the first barrel is disposed around the second barrel.
3. The camera module according to claim 2, wherein the first driving assembly includes a driving motor, a guide rod and a connecting member, one end of the connecting member is connected to the first barrel, the other end of the connecting member is movably connected to the guide rod, the driving motor is configured to drive the guide rod to rotate so as to drive the connecting member to move along the guide rod, and the connecting member drives the first barrel to extend or retract relative to the second barrel when moving.
4. The camera module according to claim 3, further comprising a detection component and a control component electrically connected to each other, wherein the detection component is configured to detect whether the first lens barrel is in a retracted state, the control component is configured to receive an extension instruction and control the driving motor to rotate in a first direction to drive the first lens barrel to extend when a detection result of the detection component is obtained, or the detection component is configured to detect whether the first lens barrel is in an extended state, and the control component is configured to receive a retraction instruction and control the driving motor to rotate in a second direction to drive the first lens barrel to retract when a detection result of the detection component is obtained, wherein the first direction is opposite to the second direction.
5. The camera module according to claim 4, wherein the detecting element includes a light detecting element, a blocking plate and a light emitting element, the blocking plate is disposed on an outer surface of the first barrel, the light emitting element is disposed opposite to the light detecting element and spaced apart from the light detecting element, the light emitting element is configured to emit light toward the light detecting element, the light detecting element is configured to receive light emitted from the light emitting element, when the first barrel is in the extended state, the blocking plate is disposed on a side of the light detecting element and the light emitting element facing the object side, and when the first barrel is in the retracted state, the blocking plate is shielded between the light emitting element and the light detecting element.
6. The camera module according to any one of claims 1 to 5, wherein an area of an orthographic projection of the second reflecting mirror in the optical axis direction is larger than an area of an orthographic projection of the image sensor in the optical axis direction, and an area of an orthographic projection of the second reflecting mirror in the optical axis direction is larger than an area of an orthographic projection of the first reflecting mirror in the optical axis direction.
7. The camera module according to any one of claims 1 to 5, wherein the second reflecting mirror has a through hole, the camera module further comprises a lens assembly disposed in the through hole, the lens assembly and the first reflecting mirror are disposed opposite to each other along the optical axis, and the lens assembly is configured to receive the light reflected by the first reflecting mirror and refract the received light to the image side.
8. The camera module of claim 7, wherein the first mirror, the second mirror, and the lens assembly are coaxially disposed.
9. An electronic device, comprising a display screen and the camera module according to any one of claims 1 to 8, wherein the display screen is electrically connected to the camera module, and the display screen is used for displaying images captured by the camera module.
CN202110555220.0A 2021-05-20 2021-05-20 Camera module and electronic equipment Active CN113296336B (en)

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