Camera module
By designing specific limit slots and avoidance gaps on the prism bracket and lens bracket of the camera module, the problem of excessive height of the camera module is solved, and a smaller module height and a wider range of application are achieved.
Patent Information
- Application Number
- CN202510225719.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-27
- Publication Date
- 2025-05-13
AI Technical Summary
The overall height of the camera module is too large, which makes it more difficult to apply on terminal products with thin specifications or even ultra-thin specifications, and even cannot be applied, which affects the scope of application of the camera module.
An imaging module is designed to ensure that imaging light can pass without obstruction by opening specific limit slots and avoidance notches on the prism bracket and the lens bracket, thereby reducing the stacking height between the lens and the prism.
It has achieved the reduction of the overall height of the camera module, reduced the difficulty of loading and use, and expanded the scope of application.
Smart Images
Figure CN119996816A_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of camera modules, and in particular, relates to a camera module. Background Art
[0002] Camera modules are usually installed on various smart terminals such as smartphones and tablet computers to realize the shooting function. Among them, some high-end products require the camera module to have a certain telephoto shooting capability. For this purpose, a prism needs to be configured in the camera module to extend the optical path between the lens and the image sensor chip to realize the telephoto shooting capability.
[0003] Usually, lenses and prisms are stacked, which increases the overall height of the module to a certain extent. This makes it more difficult to use the camera module in certain thin or even ultra-thin terminal products, or even makes it impossible to use it, which greatly affects the applicability of the camera module. Summary of the invention
[0004] The present application provides a camera module, which aims to at least to some extent solve the technical problem that the overall height of the camera module is too large, which is not conducive to assembly and use.
[0005] An embodiment of the present application provides a camera module, comprising:
[0006] A prism bracket is provided with a prism limiting groove, and a light exit window is provided on the side wall of the prism limiting groove;
[0007] A prism having an incident surface and an exit surface, wherein the prism is arranged in the prism limiting groove, and the exit surface is opposite to the light exit window;
[0008] An image sensor chip is arranged on one side of the light exit window, and the light emitted from the exit surface is projected onto the image sensor chip after passing through the light exit window;
[0009] A lens holder, having an inner cavity, wherein the lens holder is arranged on the prism holder, and an avoidance notch is arranged on the lens holder, wherein the avoidance notch is located in an optical path region of an imaging light signal between the exit surface and the image sensor chip;
[0010] The lens is arranged in the inner cavity of the lens holder, and the light-emitting side of the lens is opposite to the incident surface, and the light emitted from the lens enters the prism from the incident surface.
[0011] In some embodiments, the incident surface protrudes from the prism limiting groove and is located in the inner cavity of the lens holder.
[0012] In some embodiments, the exit surface and the incident surface are arranged adjacent to each other, and a portion of the exit surface is located in the inner cavity of the lens holder.
[0013] In some embodiments, a positioning window is provided at the bottom of the prism limiting groove, and an end of the prism away from the incident surface is embedded in the positioning window.
[0014] In some embodiments, a second avoidance recess is formed at the bottom of the prism limiting groove, and the second avoidance recess is adjacent to the exit surface.
[0015] In some embodiments, the prism holder has a light-blocking portion, which is located between the lens holder and the image sensor chip to close the gap between the light-emitting surface and the image sensor chip and block external light from entering the light path area between the light-emitting surface and the image sensor chip.
[0016] In some embodiments, the light blocking portion protrudes from the mounting surface, and a portion of the light exit window is opened in the light blocking portion.
[0017] In some embodiments, a sink is provided in the inner cavity of the lens holder, and at least a portion of the assembly surface abuts against the sink.
[0018] In some embodiments, the assembly surface is provided with adjacent supporting protrusions and first avoidance recesses, the supporting protrusions are in contact with the sink, the end of the lens holder is located in the first avoidance recess, and at least part of the notch of the prism limit groove is opened in the supporting protrusion.
[0019] In some embodiments, the lens holder and the prism holder are stacked along the optical axis direction of the lens, and part of the sink is blocked beside the supporting protrusion to limit the translation between the lenses in the orthogonal direction of the optical axis.
[0020] The embodiments of the present application have at least the following beneficial effects:
[0021] The camera module provided by the embodiment of the present application includes a prism bracket, a prism, an image sensor chip, a lens bracket and a lens; the prism bracket is provided with a prism limiting groove for accommodating the prism, and a light exit window is provided on the groove side wall opposite to the light exit surface of the prism, so that the imaging light emitted from the exit surface is projected onto the image sensor chip outside the light exit window; and the lens bracket with a built-in lens is arranged in the prism limiting groove of the prism bracket, and the light exit side of the lens is opposite to the incident surface of the prism, so that the imaging signal is projected into the prism; wherein, the lens bracket is provided with an avoidance notch, and is arranged in the optical path area between the exit surface and the image sensor chip, so as to prevent the lens bracket from blocking the imaging light signal projected to the image sensor chip, so that the distance between the lens bracket and the prism bracket can be smaller, and there is no need to reserve an anti-blocking interference space, so that the overall height of the periscope structure in which the lens and the prism are stacked can be reduced to a certain extent, so as to reduce the difficulty of loading and using the camera module and expand the scope of application. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 A schematic diagram of the structure explosion of the camera module in the embodiment of the present application is shown;
[0024] Figure 2 Shows Figure 1 A cross-sectional view of the camera module in FIG.
[0025] Figure 3 Shows Figure 1 A three-dimensional schematic diagram of the assembly state of the camera module;
[0026] Figure 4 Shows Figure 3 The main view of the camera module in FIG.
[0027] Figure 5 Shows Figure 4 A cross-sectional view of the camera module in FIG.
[0028] Figure 6 Shows Figure 1 A cross-sectional view of a prism bracket of a camera module;
[0029] Figure 7 Shows Figure 1 A three-dimensional schematic diagram of a lens bracket of a camera module;
[0030] Figure 8 Shows Figure 7 A schematic diagram of the first angle structure of the base in the lens holder;
[0031] Fig. 9 Shows Figure 7 A schematic diagram of the second angle structure of the base in the lens holder;
[0032] Fig.10 Shows Figure 7 A schematic structural diagram of a first movable seat in a lens holder;
[0033] Fig.11 Shows Figure 7 A schematic structural diagram of a second movable seat in a lens holder;
[0034] Fig.12 Shows Figure 1 Schematic diagram of the internal optical path of the camera module.
[0035] in,
[0036] 1- Lens;
[0037] 2-prism, 21-incident surface, 22-exit surface, 23-reflection surface, 24-bottom end;
[0038] 3-image sensor chip, 31-between chips, 32-filter;
[0039] 4-prism bracket, 41-prism limiting groove, 41a-notch, 41b-light exit window, 41c-positioning window, 41d-second avoidance recess, 42-assembly surface, 421-supporting protrusion, 422-first avoidance recess, 43-light blocking part;
[0040] 5-lens bracket, 5a-inner cavity, 5b-avoidance gap, 5b1-first gap, 5b2-second gap, 5b3-third gap, 51-base, 511-sunk platform, 511a-stop, 52-first movable seat, 53-second movable seat. DETAILED DESCRIPTION
[0041] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0042] In addition, the present application may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplicity and clarity, and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides various specific examples of processes and materials, but those of ordinary skill in the art may recognize the application of other processes and / or the use of other materials.
[0043] The present application is described below with reference to the accompanying drawings and specific embodiments:
[0044] Some electronic terminal devices are equipped with a camera module with a periscope telephoto mechanism, in which a prism is arranged between the lens and the image sensor chip for reflecting and folding the light signal to achieve the telephoto function. Usually, the lens and the prism need to be stacked and arranged at a high height, which makes the overall specifications of the camera module larger, increases the difficulty of installation and use of the camera module to a certain extent, and limits the scope of application.
[0045] To this end, an embodiment of the present application provides a camera module, which aims to solve, to a certain extent, the technical problems that the camera module equipped with a periscope telephoto mechanism has a high overall height, is difficult to install and adapt, and has a limited scope of application, so as to achieve the technical effect of lowering the overall height specification of the camera module and expanding the scope of application.
[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Fig.12 In some embodiments, a camera module is provided. Without changing the stacking assembly mode of the lens and the prism, the height of the camera module is reduced as a whole by designing the support structure of the lens and the prism, and the smoothness of the optical path is ensured to reduce the risk of interference and occlusion.
[0047] Specifically, the camera module includes a lens 1, a prism 2, an image sensor chip 3, a prism bracket 4 and a lens bracket 5. The prism 2 has an incident surface 21 and an exit surface 22, the lens 1 is arranged on one side of the incident surface 21, and the image sensor chip 3 is arranged on one side of the exit surface 22. The light emitted from the lens 1 enters the prism 2 from the incident surface 21, and after being reflected at least once in the prism 2, it is emitted from the exit surface 22 and then projected onto the image sensor chip 3, so as to extend the optical path and realize the telephoto shooting function.
[0048] The prism bracket 4 is a supporting and fixing structure of the prism 2, and a prism limiting groove 41 is provided on the prism bracket 4 for adapting and fixing the prism 2. In order to ensure the injection and emission of light, the prism limiting groove 41 should be designed to form a window or other passage for the imaging light signal to pass through. Specifically, the notch 41a of the prism limiting groove 41 is an open structure, which can be used as a window for the injection of light, and the incident surface 21 can be adapted to be arranged in the area of the notch 41a; and a light exit window 41b can be provided on one side of the groove wall of the prism limiting groove 4, which cooperates with the emission surface 22 to allow the light emitted from the emission surface 22 to pass through.
[0049] The lens holder 5 is used to support and fix the lens 1, and an inner cavity 5a for accommodating the lens 1 is provided inside the lens holder 5, and a fixing and supporting structure adapted to the lens 1 may also be provided in the inner cavity 5a. The lens holder 5 is supported by the prism holder 4 and can be directly or indirectly assembled on the lens holder 5.
[0050] Among them, considering the stacking use of the lens 1 and the prism 2, the lens holder 5 is located at the notch of the prism limit groove 41, and the light exit window 41b is located next to the lens holder 1, so the bottom or lower area of the lens holder 5 will be very close to the light exit window 41b, and there is a certain risk of blocking the imaging light; for this reason, there is usually a certain fitting gap between the lens holder 5 and the prism holder 4 to reduce the risk of blocking or light interference, which also makes the overall assembly height of the lens holder 5 and the prism holder 4 higher.
[0051] In order to reduce the overall height of the camera module and prevent the lens holder 5 from interfering with or blocking the imaging light signal projected toward the image sensor chip 3, an avoidance notch 5b is provided on the lens holder 5 for avoiding the imaging light signal projected from the exit surface 22 toward the image sensor chip 3, so that the lens holder 5 can be closer to the prism holder 4, thereby reducing or even eliminating the anti-interference distance between the lens holder 5 and the prism holder 4, thereby reducing the overall height of the stacked assembly between the lens 1 and the prism 2 to a certain extent.
[0052] That is to say, the avoidance gap 5b is arranged in the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3, so as to keep the optical path of the imaging light signal projected from the exit surface 22 to the image sensor chip 3 unobstructed; thereby, the distance between the lens bracket 5 and the prism bracket 4 can be reduced or even eliminated, so as to reduce the overall height of the camera module.
[0053] In some embodiments, considering that the avoidance window 41b can reduce the influence of the lens holder 5 on the outgoing light of the prism 2, the incident surface 21 can be arranged in the inner cavity 5a of the lens holder 5, thereby reducing the distance between the lens 1 and the prism 3 to a certain extent.
[0054] That is to say, part of the main body of the prism 2 can be disposed in the inner cavity 5 a of the lens holder 5 , so that the stacking assembly height of the prism 2 and the lens 1 can be further reduced.
[0055] In some embodiments, the lens 1, the prism 2 and the image sensor chip 3 are arranged in a roughly L-shape, that is, the lens 1 and the prism 2 are spaced apart along the optical axis direction O of the lens 1, and the connecting direction of the image sensor chip 3 and the prism 2 is roughly orthogonal to the optical axis direction O of the lens 1.
[0056] Correspondingly, part of the imaging light signal emitted from the exit surface 22 has the risk of interfering with the bottom or side of the lens holder 5 . Therefore, the avoidance gap 5b can be set on the side wall or bottom area of the lens holder 5 close to the image sensor chip 3 .
[0057] In some embodiments, considering that the direction of the imaging light signal emitted from the prism 2 is perpendicular to the exit surface 22, and the incident light is along the stacking direction of the lens 1 and the prism 2, that is, the optical axis direction O of the lens 1, the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 can be configured by setting the angle between the exit surface 22 and the optical axis direction O of the lens 1.
[0058] Generally speaking, the smaller the angle α between the normal direction of the exit surface 22 and the optical axis direction O of the lens 1, the closer the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 is to the lens holder 2, and the greater the risk of interference between the lens holder 2 and the imaging light signal emitted from the exit surface 22. To this end, the risk of interference can be reduced by increasing the distance between the lens holder 5 and the prism 2 and the lens holder 4; the avoidance gap 5b can also be opened on the side wall or bottom area of the lens holder 5 close to the image sensor chip 3, and the need to avoid the imaging light signal can be met by controlling the size of the avoidance gap 5b.
[0059] That is to say, by providing the avoidance gap 5b of a certain size in the lens holder 5, the distance between the lens holder 5 and the prism holder 4 can be shortened, thereby helping to reduce the overall height of the camera module; however, it also increases the structural density of the local area to a certain extent, making the structural design more difficult, and therefore needs to be considered comprehensively.
[0060] It is worth noting that the larger the angle between the normal direction of the exit surface 22 and the optical axis direction O of the lens 1, the farther the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 is from the lens holder 2, and the farther the image sensor chip 3 is from the lens 1, resulting in a higher height of the entire camera module, which is not conducive to assembly and use. Therefore, the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 can be slightly closer to the lens holder 5, such as the angle α between the normal direction of the exit surface 22 and the optical axis direction O of the lens 1 can be configured to be slightly less than 90 degrees.
[0061] In some embodiments, the prism 2 is provided with a reflection surface 23, and the imaging light signal is emitted after being reflected once in the prism 2. For example, the prism 2 can be configured as a substantially triangular prism, and the emission surface 22 is adjacent to the incident surface 21 and the reflection surface 23.
[0062] The light emitted from the lens 1 enters the prism 2 from the incident surface 21 , is then emitted from the emission surface 22 after being reflected from the radiation surface 23 , and is projected onto the image sensor chip 3 after passing through the light emission window 41 b .
[0063] The included angle between the exit surface 22 and the incident surface 21 may be configured to be greater than 90 degrees, thereby reducing the distance between the image sensor chip 3 and the lens 1 in the optical axis direction O of the lens 1, thereby reducing the overall height of the camera module.
[0064] Accordingly, the avoidance gap 5b is opened on the side wall or bottom area of the lens holder 5 close to the image sensor chip 3, which can further reduce the distance between the lens 1 and the prism 2, thereby further reducing the overall height of the camera module.
[0065] It is worth noting that, since the incident surface 21 is located inside the lens holder 5 and part of the exit surface 22 is also located inside the lens holder 5, the avoidance gap 5b can ensure to a certain extent that the exit light emitted from the exit surface 22 can pass through the lens holder 5 without obstruction.
[0066] Correspondingly, the size of the avoidance gap 5b can be configured to adapt to the angle between the exit surface 22 and the incident surface 21 to meet the need of avoiding the exiting light.
[0067] In some embodiments, the prism 2 is configured as a roughly triangular prism, the exit surface 22 is adjacent to the incident surface 21 and the included angle is an obtuse angle, and a portion of the optical path area S between the image sensor chip 3 and the exit surface 22 will protrude from the incident surface 21; correspondingly, the area of the notch 41a of the prism limit groove 41 is larger than the area of the incident surface 21, and a portion of the exit light will sequentially pass through the notch 41a and the light exit window 41b and then be projected onto the image sensor chip 3.
[0068] That is to say, a partial area of the light exit window 41 b will be higher than the assembly surface 42 and the incident surface 21 ; for example, the notch 41 a and the light exit window 41 b may be connected as one.
[0069] In some embodiments, considering that the notch 41a and the light exit window 41b are connected as one, the exposed area of the prism limit groove 41 is too large, making the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 susceptible to invasion by external interference light signals, thereby deteriorating the imaging quality.
[0070] To this end, a light blocking portion 43 may be provided on the prism support 4 to fill and close the gap between the lens support 5 and the image sensor chip 3 to form a closed light blocking structure. When the lens support 5 and the image sensor chip 3 are mounted on the prism support 4, the light blocking portion 43 may block external light from entering the optical path region S between the light exit surface 22 and the image sensor chip 3.
[0071] In some embodiments, the light blocking portion 43 may be slightly higher than the assembly surface 42 , filling between the lens holder 4 and the edge of the image sensor chip 3 , and the light blocking portion 43 does not invade the area between the exit surface 22 and the photosensitive surface of the image sensor chip 3 .
[0072] Generally speaking, light-blocking glue may be provided between the light-blocking portion 43 and the edges of the lens holder 4 and the image sensor chip 3 to further reduce interference from external light.
[0073] Correspondingly, a part of the light exit window 41b and a part of the image sensor chip 3 also protrude from the mounting surface 42 and the incident surface 21. Since a lens holder 5 is also provided on one side of the mounting surface 42, a certain height space is provided, which can provide a certain height space for the image sensor chip 3 without increasing the overall height of the camera module.
[0074] It is worth noting that, since the exit surface 22 is adjacent to the incident surface 21 and the included angle is an obtuse angle, in the optical axis direction O of the lens 1, the optical path area S between the image sensor chip 3 and the exit surface 22 is located between the lens 1 and the bottom end 24 of the prism 2, and the image sensor chip 3 will not protrude from the lens 1 and the bottom end 24 of the prism 2, thereby not increasing the overall assembly height.
[0075] In some embodiments, the light blocking portion 43 is a part of the prism bracket 4 and is prepared by cutting or mold forming process.
[0076] The assembly surface 42 , the prism limiting groove 41 and the light exit window 41 b can be formed on one blank, thereby improving the overall strength of the prism bracket 4 .
[0077] It is worth mentioning that the notch 41a and the light exit window 41b are connected as one, which will make the overall strength and shape of the prism bracket 4 remain unstable. For example, the notch 41a and the light exit window 41b will show deformation with a tendency to open or close. The light blocking portion 43 can strengthen the connection between the notch 41a and the light exit window 41b, thereby ensuring the stability of the shape of the prism bracket 41.
[0078] The light exit window 41 b may be provided on the side walls of the light blocking portion 43 and the prism limiting groove 41 , that is, surrounded by a part of the light blocking portion 43 and a part of the side walls of the prism limiting groove 41 .
[0079] Generally speaking, the area of the light exit window 41 b is larger than the area of the photosensitive area of the image sensor chip 3 .
[0080] In some embodiments, the prism 2 may also be a triangular prism, and the incident surface 21 and the exit surface 22 are orthogonal, so that
[0081] In some embodiments, through the shape design of the prism 2 and the exit surface 22 , and the posture coordination between the prism 2 and the prism holder 4 , the light emitted from the exit surface 22 can be strictly confined within the prism holder 2 .
[0082] That is, the prism bracket 4 has a certain cavity channel inside, and the notch 41 a and the light exit window 41 b are respectively arranged at two ends of the cavity channel, so as to limit the interference of external interfering light to a certain extent.
[0083] That is to say, the light blocking portion 43 can be integrated into a portion of the assembly surface that is substantially at the same height, thereby greatly reducing the area of the groove 41 a and reducing the risk of stray light interference.
[0084] In some embodiments, the prism 2 may be in a shape of a quadrangular prism or other prisms, and the lens 1, the prism 2 and the image sensor chip 3 may be arranged in an L-shape as a whole.
[0085] In order to improve the interference of stray light, a thin film may be coated on the areas other than the exit surface 22 , the incident surface 21 and other functional surfaces of the prism 2 to block external stray light from entering the prism 2 .
[0086] See also Figure 8 , Fig. 9 , Fig.10 and Fig.11 In some embodiments, a focusing function structure is provided in the camera module for driving the lens 1 to move in the inner cavity 5a along the optical axis direction O of the prism 1.
[0087] Specifically, the lens holder 5 may include a base 51 and a first movable seat 52, the base 51 is arranged on the prism holder 4, the first movable seat 52 is movably arranged in the base 51, and the moving direction of the first movable seat 52 can be set to the optical axis direction O of the lens 1, and the lens 1 can be directly or indirectly arranged on the first movable seat 52, so that the lens 1 can approach or move away from the prism 2 along its optical axis direction O to achieve focusing.
[0088] Generally speaking, a focus motor may be connected between the first movable seat 52 and the base 51 to drive the first movable seat 52 to reciprocate relative to the base 51. The focus motor may include a voice coil motor based on a coil and a magnet; or other forms of motor structures, which will not be described in detail here.
[0089] On the other hand, the avoidance gap 5b may include a first gap 5b1 arranged on the base 51, and a second gap 5b2 arranged on the first movable seat 52, the first gap 5b1 and the second gap 5b2 are arranged relatively to each other, and when the first movable seat 52 approaches the base 51, the first gap 5b1 and the second gap 5b2 can match and nest, thereby ensuring the avoidance function of the avoidance gap 5b.
[0090] Considering that the first movable seat 52 is located in the base 51, the width of the first gap 5b1 may be slightly smaller than the width of the second gap 5b2 to prevent the physical structure of the first movable seat 52 from invading the range of the first gap 5b1 and blocking the imaging light signal.
[0091] In some embodiments, in order to reduce the risk of interference between the focus motor and the lens holder 5 and the avoidance gap 5b, it is necessary to reasonably plan the position of the focus motor in the lens holder 5; for example, the focus motor can be arranged at a position away from the avoidance gap 5b.
[0092] Specifically, for a focus voice coil motor using a coil and a magnet, the coil and the magnet may be respectively disposed on a side of the first movable seat 52 and the base 51 away from the avoidance gap 5 b.
[0093] Alternatively, the coils and magnets may be provided in two groups, which are respectively provided in the two side areas of the avoidance gap 5b, so as to maintain the balance of the diagonal drive to a certain extent.
[0094] In some embodiments, the camera module is configured with a lens anti-shake function to drive the lens 1 to translate in the inner cavity 5a along a direction orthogonal to the optical axis direction O of the lens 1, thereby achieving optical anti-shake.
[0095] To this end, the lens holder 5 also includes a second movable seat 53, which is movably arranged on the first movable seat 52. The lens 1 can be installed on the second movable seat 53, and the moving direction of the second movable seat 53 relative to the first movable seat 52 is an orthogonal direction to the optical axis direction O, so that the lens 1 can be translated along the orthogonal direction of its optical axis to achieve optical image stabilization compensation.
[0096] Generally speaking, an anti-shake driving motor may be connected between the second moving seat 53 and the first moving seat 52 or the base 51 to drive the second moving seat 12 to reciprocate relative to the base 51. The anti-shake driving motor may include a voice coil motor based on a coil and a magnet; or other forms of motor structures, which will not be described in detail here.
[0097] Considering that the second movable seat 53 follows the first movable seat 52 to approach the prism 2, in order to reduce the risk of the second movable seat 53 interfering with and blocking the imaging light signal, a corresponding notch structure may also be provided on the second movable seat 53. That is, the avoidance notch 5b may also include a third notch 5b3, which is arranged opposite to the second notch 5b2, and can be matched and nested when the third notch 5b3 approaches the second notch 5b2, thereby ensuring the avoidance function of the avoidance notch 5b.
[0098] Considering that the second movable seat 53 is located on the first movable seat 52, the width of the second gap 5b2 may be slightly smaller than the width of the third gap 5b3 to prevent the physical structure of the second movable seat 53 from invading the range of the second gap 5b2 and blocking the imaging light signal.
[0099] In some embodiments, in order to reduce the risk of interference between the anti-shake drive motor and the lens holder 5 and the avoidance gap 5b, it is necessary to reasonably plan the position of the focus motor in the lens holder 5; for example, the anti-shake drive motor can be arranged at a position away from the avoidance gap 5b.
[0100] Specifically, the coils and magnets can be arranged in two groups, which are respectively arranged in the side area and the opposite side area of the avoidance gap 5b, so as to realize diagonal driving and anti-shake driving respectively.
[0101] In some embodiments, a focus motor and an anti-shake drive motor may be simultaneously configured in the lens holder 5 to realize focus drive and anti-shake drive simultaneously.
[0102] Specifically, the focus motor and the anti-shake drive motor can both adopt drive motors based on the voice coil motor principle. To this end, the focus motor and the anti-shake drive motor can be spaced apart on both sides of the avoidance gap 5b and the opposite area; that is, the avoidance gap 5b, the focus motor and the anti-shake drive motor are spaced apart along the circumferential direction of the inner cavity of the lens holder 5.
[0103] It is worth noting that, considering the force balance, a voice coil motor may also be arranged on the side where the avoidance gap 5 b is located to balance the driving force of the area on the opposite side of the avoidance gap 5 b and maintain the force balance of the lens 1 .
[0104] In some embodiments, the image sensor chip 3 can be connected to the prism bracket 4 via a chip bracket 31 to ensure the stability of the posture and position of the image sensor chip 3 and to ensure the presentation quality.
[0105] Generally speaking, the photosensitive plane of the image sensor chip 3 can be arranged parallel to the emission surface 22 .
[0106] In some embodiments, a filter 32 may be further disposed on the chip holder 31 , and the filter 32 is disposed between the image sensor chip 3 and the exit surface 22 to filter out interfering light signals.
[0107] It is worth mentioning that, considering that the entire camera module is roughly L-shaped, the prism 2 realizes the turning of the optical path. Therefore, the camera module will implement the AA process in the optical axis direction O and its orthogonal direction respectively. During the assembly process, the accuracy of the optical path offset can be increased through two AA processes to improve the imaging quality.
[0108] The lens support 5 and the chip support 31 can be fixed on the prism support 4 by adhesive material.
[0109] In some embodiments, considering that the exit surface 22 is located in the prism limiting groove 41 and the image sensor chip 3 is at a certain distance from the exit surface 22, a certain gap can be left between the exit surface 22 and the side groove wall where the light exit window 41b is located to form an unobstructed semi-enclosed space. On the one hand, the risk of blocking the imaging light signal emitted from the exit surface is reduced, and on the other hand, the external interference light entering the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 can be reduced to a certain extent, thereby enhancing the anti-interference ability.
[0110] That is to say, the prism 2 is arranged close to the side of the prism limiting groove 41 away from the light exit window 41b, and the specifications of the groove 41a and the light exit window 41b meet the requirement that the imaging light signal emitted from the light exit surface 22 can pass through without obstruction.
[0111] In some embodiments, considering that one side of the prism 2 is left empty, there is a risk of insufficient limiting ability. For this purpose, a positioning window 41c can be opened at the bottom of the prism limiting groove 41, and the bottom end 24 of the prism 2, that is, the end away from the incident surface 21, is embedded in the positioning window 41c to achieve bottom limiting, thereby reducing the risk of displacement and vibration of the prism 2 to a certain extent.
[0112] Furthermore, considering that the bottom end 24 of the prism 2 is adjacent to the exit surface 22 and is embedded in the positioning window 41c, the edge portion of the exit surface 22 is lower than the bottom of the prism limiting groove 41, so there is a certain risk of blocking the imaging light signal emitted from the exit surface 22 by the bottom of the groove; for this reason, a sunken recess, i.e., a second avoidance recess 41d, can be set in the bottom area of the prism limiting groove 41, and the second avoidance recess 41d is adjacent to the exit surface 22, thereby reducing the risk of blocking the light signal to a certain extent.
[0113] Generally speaking, the area size and depth of the second avoidance recess 41 d can be adaptively set according to the position of the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3 to reduce the risk of shielding.
[0114] In some embodiments, considering that the lens holder 5 is disposed on the prism holder 4, there is a certain gap between the lens 1 and the prism 2. The gap between the lens 1 and the prism 2 can be reduced by the lens holder 5 and the structural design of the lens holder 5 as well as the matching form of the lens holder 5, thereby further reducing the overall height of the module.
[0115] Specifically, a sink 511 is provided in the inner cavity 5a of the lens holder 5, and the prism holder 4 has an assembly surface 42 adapted to the lens holder 4, and at least part of the assembly surface 42 is embedded in the inner cavity 5a and abuts against the sink 511, thereby reducing the overall assembly height of the lens holder 5 and the prism holder 4 to a certain extent.
[0116] Among them, the prism limiting groove 41 is opened on the assembly surface 42, and the incident surface 21 of the prism 2 also follows part of the assembly surface 42 and at least part of the groove 41a and is embedded in the inner cavity 5a, thereby reducing the distance between the lens 1 and the prism 2, and also helping to reduce the stacking assembly height of the camera module.
[0117] In some embodiments, the assembly surface 42 can be configured as a small-sized form, so that the assembly surface 42 and the prism limiting groove 41 within its range and part of the lens body near the incident surface 21 of the prism 2 can be integrally embedded in the inner cavity 5a, thereby reducing the assembly height of the prism 2 and the lens 1 as a whole.
[0118] Among them, since part of the mirror body near the incident surface 21 is located in the inner cavity 5a of the lens holder 5, part of the structure of the lens holder 5 will invade the optical path area S of the imaging light signal between the exit surface 22 and the image sensor chip 3, and there is a risk of blocking the imaging light signal; for this reason, by setting the shape and size of the avoidance gap 5b, the risk of blocking the imaging light signal can be reduced or even eliminated, thereby ensuring the reliability of shooting, thereby taking into account both the need to reduce the assembly height of the camera module and the need to ensure the reliability of the shooting function.
[0119] In some embodiments, considering that the shape of the prism holder 4 is related to the shape of the prism 4 and the surrounding matching structure, and has certain specifications, there is a certain degree of compatibility between the prism holder 4 and the inner cavity 5a of the lens holder 5. To this end, only part of the assembly surface 42 and part of the notch 41 area can be embedded in the inner cavity 5a, so as to meet the requirement of reducing the assembly height, and also reduce the difficulty of assembling the prism holder 4 and the lens holder 5, thereby reducing the volume specification requirements of the lens holder 5 to a certain extent.
[0120] That is to say, a part of the mounting surface 42 is configured to be embedded in the inner cavity 5 a of the lens holder 5 , and another part is located outside the lens holder 5 .
[0121] Specifically, the assembly surface 42 is provided with a supporting protrusion 421 and a first avoiding recess 422, and there is a height difference between the supporting protrusion 421 and the first avoiding recess 422. The supporting protrusion 421 is embedded in the inner cavity 5a of the lens holder 5 and abuts against the sink 511, and the first avoiding recess 422 can provide an avoiding space for the side of the lens holder 5 close to the assembly surface 422, that is, the end of the lens holder 5 can be correspondingly arranged in the area of the first avoiding recess 422, so that the first supporting protrusion 421 can be stably embedded in the inner cavity 5a.
[0122] Generally speaking, the first avoiding recess 422 can be adapted to surround the supporting protrusion 421 .
[0123] On the other hand, at least part of the prism limiting groove 41 may be opened in the region of the supporting protrusion 421 , that is, the part where the incident surface 21 of the prism 2 is located and the region where the notch 41 a is located may be located in the region of the supporting protrusion 421 .
[0124] In some embodiments, in the stacking direction of the lens 1 and the prism 2, the support protrusion 421 abuts against the table surface of the sink 511. However, in the direction orthogonal to the stacking direction of the lens 1 and the prism 2, there is a risk of relative sliding between the lens holder 5 and the support protrusion 421. To this end, the shape of the sink 511 can be set so that part of the main body of the sink 511 is blocked by the side of the support protrusion 421 to limit the relative sliding of the sink 511 and the support protrusion 421 in the direction orthogonal to the stacking direction of the lens 1 and the prism 2, thereby ensuring the stability of the relative position of the lens holder 5 and the prism holder 4 and ensuring the shooting quality.
[0125] In some embodiments, the sink 511 can be configured as a stop 511a opened on the end surface of the lens holder 5, the supporting protrusion 421 can be adapted to abut against the stop 511a, and the rest of the end of the lens holder 5 is located in the area of the first avoidance recess 422.
[0126] That is to say, on one side end face of the lens holder 5 close to the prism holder 4 , a sunken groove is provided close to the edge area of the inner cavity 5 a to form the stop 511 a for accommodating the supporting protrusion 421 .
[0127] Generally speaking, the stopper 511a can be configured as an annular stopper structure arranged along the circumference of the port of the inner cavity 5a, so as to take into account both the reliability of fixation and relatively simple processing operations.
[0128] The stop 511a may also be configured as a plurality of discrete stop structures spaced apart along the circumference of the port of the inner cavity 5a, which can reduce the material usage of the lens holder 5 to a certain extent while ensuring reliable assembly.
[0129] The embodiments of the present application have at least the following beneficial effects:
[0130] The camera module provided by the embodiment of the present application includes a prism bracket, a prism, an image sensor chip, a lens bracket and a lens; the prism bracket is provided with a prism limiting groove for accommodating the prism, and a light exit window is provided on the groove side wall opposite to the light exit surface of the prism, so that the imaging light emitted from the exit surface is projected onto the image sensor chip outside the light exit window; and the lens bracket with a built-in lens is arranged in the prism limiting groove of the prism bracket, and the light exit side of the lens is opposite to the incident surface of the prism, so that the imaging signal is projected into the prism; wherein, the lens bracket is provided with an avoidance notch, and is arranged in the optical path area between the exit surface and the image sensor chip, so as to prevent the lens bracket from blocking the imaging light signal projected to the image sensor chip, so that the distance between the lens bracket and the prism bracket can be smaller, and there is no need to reserve an anti-blocking interference space, so that the overall height of the periscope structure in which the lens and the prism are stacked can be reduced to a certain extent, so as to reduce the difficulty of loading and using the camera module and expand the scope of application. The lens holder is provided with an inner cavity for accommodating the lens, and a sink is arranged in the inner cavity, and at least part of the assembly surface abuts against the sink, so that at least part of the prism holder and the incident surface of the prism are embedded in the lens holder, thereby reducing the stacking height of the lens holder and the prism holder, and correspondingly reducing the overall height of the camera module, thereby reducing the difficulty of loading and using the camera module and expanding the scope of application.
[0131] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0132] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise" and "counterclockwise" indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0133] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0134] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0135] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0136] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.
[0137] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that they can be implemented by ordinary technicians in this field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0138] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the claims and their equivalents.
Claims
1. A camera module, characterized in that: include: A prism bracket is provided with a prism limiting groove, and a light exit window is provided on the side wall of the prism limiting groove; A prism having an incident surface and an exit surface, wherein the prism is arranged in the prism limiting groove, and the exit surface is opposite to the light exit window; An image sensor chip is arranged on one side of the light exit window, and the light emitted from the exit surface is projected onto the image sensor chip after passing through the light exit window; A lens holder, having an inner cavity, wherein the lens holder is arranged on the prism holder, and an avoidance notch is arranged on the lens holder, wherein the avoidance notch is located in an optical path region of an imaging light signal between the exit surface and the image sensor chip; The lens is arranged in the inner cavity of the lens holder, and the light-emitting side of the lens is opposite to the incident surface, and the light emitted from the lens enters the prism from the incident surface.
2. The camera module according to claim 1, characterized in that: The incident surface protrudes from the prism limiting groove and is located in the inner cavity of the lens holder.
3. The camera module according to claim 2, characterized in that: The exit surface and the incident surface are arranged adjacent to each other, and a portion of the exit surface is located in the inner cavity of the lens holder.
4. The camera module according to claim 1, characterized in that: A positioning window is provided at the bottom of the prism limiting groove, and one end of the prism away from the incident surface is embedded in the positioning window.
5. The camera module according to claim 4, characterized in that: A second avoidance recess is formed at the bottom of the prism limiting recess, and the second avoidance recess is adjacent to the emission surface.
6. The camera module according to claim 1, characterized in that: The prism bracket has a light-blocking portion, which is located between the lens bracket and the image sensor chip to close the gap between the light-emitting surface and the image sensor chip and prevent external light from entering the light path area between the light-emitting surface and the image sensor chip.
7. The camera module according to claim 6, characterized in that: The light blocking portion protrudes from the mounting surface, and a portion of the light exit window is opened in the light blocking portion.
8. The camera module according to any one of claims 1 to 7, characterized in that: A sinking platform is arranged in the inner cavity of the lens holder, and at least a part of the assembly surface abuts against the sinking platform.
9. The camera module according to claim 8, characterized in that: The assembly surface is provided with adjacent supporting protrusions and first avoiding recesses, the supporting protrusions are in contact with the sink, the end of the lens holder is located in the first avoiding recess, and at least part of the notch of the prism limiting groove is opened in the supporting protrusion.
10. The camera module according to claim 9, characterized in that: The lens holder and the prism holder are stacked along the optical axis direction of the lens, and part of the sink is blocked beside the supporting protrusion to limit the translation between the lenses in the orthogonal direction of the optical axis.