Three-fold periscopic camera module

Abstract

The utility model relates to the technical field of camera shooting, and discloses a three-fold periscopic camera module, which comprises a shell, and a light reflecting part, a lens assembly, a circuit board and a sensor assembly electrically connected with the circuit board which are respectively arranged in the shell, and the shell is provided with a light inlet; the light reflecting part is provided with a light transmitting surface; the lens assembly directly faces the light inlet and the light inlet side of the light transmitting face in the light inlet direction. The sensor assembly directly faces the light-emitting side of the light-transmitting face in the light-emitting direction. Through cooperative use of the shell, the light reflecting part, the lens assembly, the circuit board and the sensor assembly, light can be reflected, captured and imaged through the light inlet, through arrangement of the light reflecting part, a light beam is reflected multiple times when the light beam is emitted into the light inlet through the light inlet, the reflection distance of the light beam is lengthened, and the imaging effect is improved. And the incoming light and the outgoing light are positioned on the same side, so that the thickness of the whole camera is reduced, and meanwhile, the light incoming amount and the long-focus multiplying power are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of imaging, and particularly relates to a triple-fold periscope camera module. Background Art

[0002] The periscope camera module is a unique optical system, whose design inspiration comes from the periscope of a submarine. This camera has a long focal length and a special lens structure, and realizes distortion-free imaging by refracting light from the lens surface into the interior. The main feature of the periscope camera module is that it can refract light onto the built-in image sensor, thereby achieving distortion-free imaging within a limited range.

[0003] The periscope camera module realizes the anti-shake function through the built-in OIS (OIS: Optical Image Stabilization System). OIS is a technology that compensates for the image displacement generated by a camera or a camcorder during movement or anti-shake physically or electronically. It can effectively reduce the image blurring caused by camera shake and improve the clarity and stability of shooting. By physically or electronically compensating for the image displacement, the captured images and videos are clearer and more stable. It aims to improve the quality of images and videos, especially in low light conditions or when shooting moving objects. Traditional OIS corrects the "optical axis shift" by moving the lens. However, currently, with the increase in the size and pixels of the image sensor, both the motor and the lens have increased to varying degrees, and the change in the size of the mobile phone camera has increased its thickness, causing it to protrude from the back of the mobile phone, which affects the thickness and aesthetics of the mobile phone. Summary of the Utility Model

[0004] Aiming at the deficiencies of the above-mentioned prior art, the technical problem to be solved by the utility model is: to provide a triple-fold periscope camera module to solve the problem that the size of the existing periscope camera using OIS increases, resulting in an increase in thickness.

[0005] To solve the above technical problems, a technical solution adopted by the present utility model is: to provide a triple-fold periscope camera module, which includes a hollow outer shell, a reflecting part arranged inside the outer shell, a lens assembly arranged inside the outer shell, a circuit board arranged inside the outer shell and electrically connected to the lens assembly, and a sensor assembly installed inside the outer shell and electrically connected to the circuit board. There are relatively arranged first connection surface and second connection surface inside the outer shell, and a light inlet is opened on the outer shell to penetrate the second connection surface along a light incident direction; the reflecting part has a light-transmitting surface flush with the first connection surface. After the incident light beam shoots into the reflecting part from the light incident side of the light-transmitting surface, the reflecting part makes the light beam be reflected multiple times and then shoot out from the light exit side of the light-transmitting surface along a light exit direction; the lens assembly is directly opposite to the light inlet and the light incident side of the light-transmitting surface along the light incident direction; the sensor assembly is installed inside the outer shell and electrically connected to the circuit board, and the sensor assembly is directly opposite to the light exit side of the light-transmitting surface along the light exit direction. The reflecting part makes the light beam be reflected multiple times inside it to lengthen the reflection distance of the light beam inside the reflecting part, so as to convert the thickness of the lens assembly into length, reduce the thickness of the entire lens assembly or even the camera, and avoid the lens assembly protruding from the fuselage and affecting the thickness and aesthetics of the mobile phone.

[0006] Further, the reflecting part includes a polygonal prism embedded on the first connection surface. The polygonal prism has the light-transmitting surface facing the second connection surface and a refracting surface for reflecting the light beam multiple times inside the polygonal prism, so as to increase the light incident amount and improve the telephoto magnification.

[0007] Further, the polygonal prism includes a trapezoidal prism. The surface of the trapezoidal prism facing the second connection surface is the light-transmitting surface. The refracting surface includes a first reflecting surface and a second reflecting surface that are symmetric and adjacent to the light incident side and the light exit side of the light-transmitting surface respectively, so as to be able to reflect the light beam from the light incident side to the light exit side after multiple reflections.

[0008] Further, the refracting surface also includes a reflection area on the light-transmitting surface located between the light incident side and the light exit side for reflecting the light beam. The first reflecting surface and the second reflecting surface are close to each other in opposite directions and are relatively inclined away from the light-transmitting surface. The first reflecting surface reflects the light beam incident along the light incident direction from the light incident side to the reflection area, and the second reflecting surface reflects the light beam reflected by the reflection area along the light exit direction to the light exit side, so as to form a triple-fold reflection, effectively improving the light incident amount and the telephoto magnification.

[0009] Further, the lens assembly includes a first anti-shake driving group arranged inside the outer shell and electrically connected to the circuit board, and a lens installed on the first anti-shake driving group. The lens is arranged facing the light inlet and the light incident side respectively along the light incident direction. The first anti-shake driving group is used to drive the lens to move to achieve lens anti-shake and compensation.

[0010] Further, the first anti-shake drive group includes a first anti-shake motor electrically connected to the circuit board and a housing connected to the circuit board and covering the first anti-shake motor. The first anti-shake motor drives the lens to move along the X-axis and Y-axis to achieve optical anti-shake on the X-axis and Y-axis.

[0011] Further, the first anti-shake drive group further includes elastic connection parts respectively connected to the first anti-shake motor and the lens. The elastic connection parts ensure the connection between the first anti-shake motor and the lens and can be used to balance the electromagnetic force at the same time.

[0012] Further, the elastic connection part includes a first shape memory alloy wire respectively electrically connected to the first anti-shake motor and the circuit board. The first shape memory alloy wire can drive the lens to move after being heated by electricity.

[0013] Further, the sensor assembly includes a second anti-shake drive group electrically connected to the circuit board and a sensor disposed on the second anti-shake drive group and facing the light-emitting side of the light-transmitting surface along the light-emitting direction, so that the second anti-shake drive group can drive the sensor to move, combined with the first anti-shake drive group to increase the optical anti-shake angle and reduce the impact on imaging.

[0014] Further, a filter is disposed between the sensor assembly and the light-emitting side of the light-transmitting surface to be able to select the required radiation band, reduce the light intensity, and make the image clearer.

[0015] The three-fold periscope camera module of the present utility model has at least the following beneficial effects: through the cooperation of the housing, the light-reflecting part, the lens assembly, the circuit board and the sensor assembly, light can be reflected, captured and imaged through the light inlet. Through the setting of the light-reflecting part, the light beam is reflected multiple times when it enters its interior through the light inlet, lengthening the reflection distance of the light beam, and making the light inlet and the light outlet on the same side to reduce the thickness of the entire camera, while increasing the light intake and the telephoto magnification. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings described herein are used to provide a further understanding of the present application and form a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation of the present application. In the drawings:

[0017] Figure 1 is a side cross-sectional view of the three-fold periscope camera module of the present utility model.

[0018] The meanings of the reference numerals in the drawings are as follows:

[0019] Housing - 1; First housing - 11; First connection surface - 12; Reflective part - 2; Translucent surface - 21; Light incident side - 211; Light exit side - 212; Reflection area - 213; First reflection surface - 22; Second reflection surface - 23; Lens assembly - 3; First anti - shake motor - 311; First outer housing - 312; Enclosure edge - 313; Lens - 32; Sensor assembly - 4; Second anti - shake drive group - 41; Second anti - shake motor - 411; Second outer housing - 412; Sensor - 42; Filter - 5. Detailed implementation

[0020] The present utility model will be further described below with reference to the accompanying drawings.

[0021] As Figure 1 shown, a three - fold periscope camera module of the present utility model includes a housing 1 with a hollow interior, a reflective part 2 disposed inside the housing 1, a lens assembly 3 disposed inside the housing 1, a circuit board disposed inside the housing 1 and electrically connected to the lens assembly 3, and a sensor assembly 4 disposed inside the housing 1 and electrically connected to the circuit board. The housing 1 is used to provide protection and support for structures such as the reflective part 2 and allow light beams to enter its inner cavity; the reflective part 2 is used to support and reflect light beams to a certain extent to adjust the light beams, improve the imaging quality, and enhance the light incident amount; the lens assembly 3 is used for depth - of - field shooting to present the optical image on the sensor assembly 4 of the camera, the circuit board provides electrical signals for the lens assembly 3 and the sensor assembly 4, and the sensor assembly 4 is used to capture light and convert the captured light into digital image data for imaging.

[0022] In this embodiment, the housing 1 includes a first housing 11 and a second housing (not shown in the figure). The first housing 11 is hollow inside and penetrates toward one side along the Z - axis direction. The second housing is hollow inside and penetrates along the Z - axis direction on the side opposite to and relative to the first housing 11 and can cover or be buckled inside the first housing 11 so that the first housing 11 and the second housing jointly enclose a cavity. An light incident port communicating with the inner cavity is penetrated along the Z - axis direction on the second housing, and the light incident port is biased toward one end along the X - axis direction relative to the second housing so that the light beam can enter the inner cavity of the housing 1 through the light incident port, and the corresponding lens assembly 3 and sensor assembly 4 are both spaced apart along the X - axis direction. In the content defined in this embodiment, there are a first connection surface 12 and a second connection surface disposed opposite to each other in the inner cavity of the housing 1. The side surface of the first housing 11 facing the second housing is defined as the first connection surface 12, and the side surface of the second housing facing the first housing 11 is defined as the second connection surface. In this embodiment, the Z - axis direction can be defined as the light incident direction, but the light incident direction is not limited to the Z - axis direction and can be inclined relative to the Z - axis direction. It should be noted that, Figure 1It is only a partial structure of the housing 1, but the housing 1 structure in the present utility model can be any camera module structure in the prior art.

[0023] In this embodiment, the light reflecting portion 2 is disposed on the first housing 11 and has a light transmissive surface 21 flush with the first connection surface 12. The light transmissive surface 21 has a light incident side 211 and a light exit side 212 corresponding to the positions of the lens assembly 3 and the sensor assembly 4 respectively. The light incident side 211 is arranged corresponding to the light incident port along the Z-axis direction, and the lens assembly 3 is located between the light incident port and the light incident side 211. A reflection area 213 for reflecting light beams is provided on the portion of the light transmissive surface 21 between the light incident side 211 and the light exit side 212. When the light enters the interior of the light reflecting portion 2 and irradiates the reflection area 213, it is reflected. The reflection area 213 can be on the light transmissive surface 21 corresponding to the corresponding part of the reflection area 213. In the content defined in this embodiment, the light reflecting portion 2 includes a polygonal prism embedded on the first connection surface 12. The polygonal prism has a light transmissive surface 21 facing the second connection surface and a refraction surface for multi-fold reflecting the light beam within the polygonal prism. In the content defined in this embodiment, the polygonal prism is a trapezoidal prism embedded on the first connection surface 12. The surface of the trapezoidal prism facing the second connection surface is the light transmissive surface 21. The trapezoidal prism also has a first reflection surface 22 and a second reflection surface 23 that are symmetric and adjacent to the light incident side 211 and the light exit side 212 of the light transmissive surface 21 respectively. The first reflection surface 22 and the second reflection surface 23 correspond to the two waists of the trapezoidal prism. A matching installation groove is provided on the first connection surface 12 of the first housing 11 corresponding to the shape and size of the trapezoidal prism one by one, and the trapezoidal prism is fixedly installed in the installation groove. In order to facilitate the light beam to be reflected toward the second connection surface side, the narrow side of the trapezoidal prism is oriented away from the second connection surface side, and the wide side of the trapezoidal prism is defined as the light transmissive surface 21 and oriented toward the second connection surface, that is, the sides of the first reflection surface 22 and the second reflection surface 23 away from the light transmissive surface 21 approach each other and are relatively inclined.

[0024] In use, the incident light beam enters the housing 1 from the light inlet and passes through the lens assembly 3, and then is incident on the first reflecting surface 22 inside the reflecting part 2 from the light incident side 211 of the light transmissive surface 21. The first reflecting surface 22 reflects the light beam incident along the light incident direction from the light incident side 211 to the reflection area 213 for the first time. The reflection area 213 reflects the light beam to the second reflecting surface 23 for the second time. The second reflecting surface 23 reflects the light beam reflected by the reflection area 213 along the light exit direction to the light exit side 212 for the third time. The reflecting part 2 makes the light beam exit along a light exit direction from the light exit side 212 of the light transmissive surface 21 after multiple reflections, thereby increasing the refraction of the light path, increasing the light incident amount and raising the telephoto magnification to 5X. At the same time, the distance of the light path is increased, the length of the lens 32 in the lower X-axis direction is increased, and compared with the prior art, the thickness of the lens 32 (i.e., the length in the Z-axis) is reduced, effectively reducing the thickness of the module, reducing or even avoiding its protrusion from the body, and enhancing the overall aesthetic feeling of the mobile phone in use.

[0025] In this embodiment, the lens assembly 3 is directly opposite to the light inlet and the light incident side 211 along the light incident direction, so that the light beam can be incident on the lens assembly 3 after passing through the light inlet, and the lens assembly 3 then continues to make the light beam incident on the trapezoidal prism. The lens assembly 3 includes a first anti-shake driving group 31 disposed in the housing 1 and electrically connected to the circuit board, and a lens 32 mounted on the first anti-shake driving group 31. The lens 32 is arranged facing the light inlet and the light incident side 211 respectively along the light incident direction. The first anti-shake driving group 31 is used to drive the lens 32 to move to adjust the optical anti-shake angle, so as to compensate for the influence brought by the movement of the lens 32.

[0026] In the content defined by this embodiment, the first anti-shake drive group 31 includes a first anti-shake motor 311 electrically connected to the circuit board, a first housing body connected to the circuit board and covering the first anti-shake motor 311, and an elastic connection portion 313 respectively connected to the first anti-shake motor 311 and the lens 32. The first anti-shake motor 311 drives the lens 32 to move along the X-axis and Y-axis. The first housing body is used to support the first anti-shake motor 311. The lens 32 is elastically connected to the first anti-shake motor 311 through the elastic connection portion 313, so that the first anti-shake motor 311 can drive the lens 32 to move after passing current, realizing the adjustment of the optical anti-shake angle. Specifically, the inside of the first housing body is hollow and runs through along the light incident direction. A surrounding edge 313 in a necking shape is formed on one side of the first housing body close to the second connection surface. After the first housing body is installed on the first shell 11, the first anti-shake motor 311 and the elastic connection portion 313 are both arranged inside the first housing body. The surrounding edge 313 can block the first anti-shake motor 311 to prevent the first anti-shake motor 311 from detaching from the first housing body. The first anti-shake motor 311 uses a voice coil motor to drive the lens 32 to move along the X-axis and Y-axis directions after power-on, realizing optical anti-shake, and the optical anti-shake angle is about 1°. There is no need to reserve more movement range in the overall design of the mobile phone, which is more beneficial to the ID design of the mobile phone. The first anti-shake motor 311 can also drive the lens to move in the Z-axis direction to realize autofocus. The elastic connection portion 313 includes a first shape memory alloy wire respectively electrically connected to the first anti-shake motor 311 and the circuit board. The two ends of the first shape memory alloy wire are respectively connected to the housing body and the anti-shake frame. The first shape memory alloy wire can drive the lens 32 to move after being heated by power-on, so as to balance the electromagnetic force and improve the anti-shake effect.

[0027] The circuit board can be installed at any position and can be in a frame structure surrounding the inner cavity of the housing 1 to facilitate electrical connection with the lens assembly 3 and the sensor assembly 4. A connector is electrically connected to the circuit board, and a part of the circuit board with the connector is located outside the housing 1 to facilitate electrical connection with the electronic components inside the mobile phone. It should be noted that the circuit board should not block the light inlet and the light-transmitting surface 21.

[0028] In this embodiment, the sensor assembly 4 includes a second anti-shake drive group 41 electrically connected to the circuit board, and a sensor 42 disposed on the second anti-shake drive group 41 and facing the light-emitting side 212 of the light-transmitting surface 21 along the light-emitting direction. Both the second anti-shake drive group 41 and the sensor 42 face the light-emitting side 212 of the light-transmitting surface 21 along the light-emitting direction. The second anti-shake drive group 41 is used to drive the sensor 42 to move. The sensor 42 is an image sensor 42 for capturing optical images and performing imaging processing. The second anti-shake drive group 41 includes a second anti-shake motor 411 electrically connected to the circuit board, and a second housing body movably disposed on the circuit board and covering the second anti-shake motor 411. The sensor 42 is mounted on the second housing body and electrically connected to the circuit board. After current is applied to the second anti-shake motor 411, the second anti-shake motor 411 moves along the X-axis and Y-axis, driving the sensor 42 to move, achieving optical anti-shake of the sensor 42. In cooperation with the optical anti-shake of the lens 32, the anti-shake angles are superimposed to increase the anti-shake angle of the optical anti-shake. The second anti-shake motor 411 can also be a voice coil motor and uses a second shape memory alloy wire. The second shape memory alloy wire is electrically connected to the circuit board and the sensor 42 to balance the electromagnetic force of the second anti-shake motor 411, achieving a certain optical anti-shake function at 1 degree at 2 Hz, 4 Hz, and 6 Hz in cooperation with the second anti-shake motor 411, compensating for the jitter caused by the magnification, and improving the anti-shake effect. In this embodiment, the light-emitting direction is parallel to the light-incident direction and emits light along the Z-axis direction. The light-emitting direction can also be a direction inclined relative to the Z-axis direction, but the angles between the light-incident direction and the light-emitting direction and the Z-axis should both be less than 90 degrees, preferably less than 45 degrees to facilitate the emission of the light beam. It should be noted that a filter 5 is provided between the sensor 42 of the sensor assembly 4 and the light-emitting side 212 of the light-transmitting surface 21. The light beam first passes through the filter 5 after being emitted from the light-emitting side 212 of the reflection portion. The filter 5 is used to select the required radiation band, reduce the light intensity, make the image clearer, and the light beam passing through the filter 5 is imaged by the sensor 42.

[0029] It should be noted that corresponding gyroscopes, accelerometers, and a control system are also provided in the housing 1 to control the first anti-shake motor 311 and the second anti-shake motor 411. When the gyroscopes and accelerometers detect movement, they send signals to the control system. The control system calculates the necessary compensatory movement based on these signals and moves the lens 32 and the sensor 42 through the first anti-shake motor 311 and the second anti-shake motor 411, thereby offsetting the influence of the camera movement and ensuring a clear image.

[0030] The working method of one embodiment of the three-fold periscope camera module of the present utility model is as follows: During shooting, the light beam is projected from the light inlet to the lens assembly 3, and the lens assembly 3 projects the optical image onto the light-transmitting surface 21 of the light-reflecting part 2. The light beam is projected from the light-incident side 211 of the light-transmitting surface 21 into the light-reflecting part 2, undergoes three-fold reflection inside, and then passes through the filter 5 from the light-emitting side 212 until it is projected onto the sensor 42. The sensor 42 performs imaging processing on the optical image. Among them, through the coordinated movement between the first anti-shake drive group and the second anti-shake drive group, anti-shake and autofocus are achieved.

Claims

1. A triple-fold periscope camera module, characterized in that include: A housing having a hollow interior and having a first connecting surface and a second connecting surface disposed opposite to each other, and a light inlet extending through the second connecting surface along a light inlet direction is formed on the housing; A reflective portion, the reflective portion being disposed within the housing and having a light-transmitting surface flush with the first connecting surface. After an incident light beam is emitted from the light-entry side of the light-transmitting surface into the interior of the reflective portion, the light beam is reflected by the reflective portion multiple times and then emitted from the light-emitting side of the light-transmitting surface in a light-emitting direction. A lens assembly is disposed in the housing and faces the light inlet and the light-incoming side of the light-transmitting surface along the light-incoming direction; a circuit board, disposed in the housing and electrically connected to the lens assembly; as well as A sensor component is installed in the housing and electrically connected to the circuit board, and the sensor component faces the light-emitting side of the light-transmitting surface along the light-emitting direction.

2. The triple-fold periscope camera module according to claim 1, wherein: The reflective portion includes a polygonal prism embedded in the first connecting surface. The polygonal prism has the light-transmitting surface facing the second connecting surface and a refractive surface for performing multi-fold reflection on the light beam in the polygonal prism.

3. The triple-fold periscope camera module according to claim 2, wherein: The polygonal prism includes a trapezoidal prism, the surface of the trapezoidal prism facing the second connecting surface is the light-transmitting surface, and the refractive surface includes a first reflecting surface and a second reflecting surface that are symmetrical and respectively adjacent to the light-incoming side and the light-outgoing side of the light-transmitting surface.

4. The triple-fold periscope camera module according to claim 3, wherein: The refractive surface also includes a reflection area for reflecting the light beam located on the light-transmitting surface between the light-entering side and the light-emitting side. The first reflection surface and the second reflection surface are close to each other and inclined relative to each other away from the light-transmitting surface. The first reflection surface reflects the light beam incident along the light-entering direction from the light-entering side to the reflection area, and the second reflection surface reflects the light beam reflected by the reflection area along the light-emitting direction to the light-emitting side.

5. The triple-fold periscope camera module according to claim 1, wherein: The lens assembly includes a first anti-shake drive group arranged in a shell and electrically connected to a circuit board, and a lens mounted on the first anti-shake drive group. The lens is arranged facing the light inlet and the light input side along the light input direction, and the first anti-shake drive group is used to drive the lens to move.

6. The triple-fold periscope camera module according to claim 5, wherein: The first anti-shake driving group includes a first anti-shake motor electrically connected to the circuit board and an outer shell connected to the circuit board and covering the first anti-shake motor. The first anti-shake motor drives the lens to move along the X-axis and the Y-axis.

7. The triple-fold periscope camera module according to claim 6, characterized in that: The first anti-shake driving group further includes elastic connecting parts respectively connected to the first anti-shake motor and the lens.

8. The triple-fold periscope camera module according to claim 7, wherein: The elastic connection portion includes a first shape memory alloy wire electrically connected to the first anti-shake motor and the circuit board respectively.

9. The triple-fold periscope camera module according to claim 1, wherein: The sensor assembly includes a second anti-shake driving group electrically connected to the circuit board and a sensor arranged on the second anti-shake driving group and facing the light-emitting side of the light-transmitting surface along the light-emitting direction.

10. The triple-fold periscope camera module according to claim 1, wherein: A filter is provided between the sensor assembly and the light-emitting side of the light-transmitting surface.

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