CN220798387U - AF camera module miniaturized structure - Google Patents

Abstract

The utility model discloses an AF camera module miniaturized structure, which relates to the technical field of camera equipment, and comprises the following components: the photoelectric conversion module is used for converting the image optical signals into electric signals; the T-lens device is arranged at the upper end of the photoelectric conversion module and is electrically connected with the photoelectric conversion module; the lens is arranged at the upper end of the T-lens device, and transmits external optical signals to the photoelectric conversion module through the T-lens device. According to the T-lens device, the T-lens device is arranged between the photoelectric conversion module and the lens, so that the protection effect on the T-lens device is improved, the problem of impact failure is reduced, and the reliability is enhanced.

Description

AF camera module miniaturized structure

Technical Field

The utility model relates to the technical field of camera equipment, in particular to an AF camera module miniaturized structure.

Background

At present, conventional camera modules are divided into an AF module (Auto Focus) and an FF module (fixed Focus) and the FF module is not required to be designed with a VCM (VCM) structurally, because the FF module is free of the VCM, the shape of the FF module can be smaller than that of the AF module, but compared with the AF module, the AF module lacks an Auto Focus function, and the AF module is required to be smaller for the situation that the space of a camera module in a mobile phone is smaller and smaller.

The T-lens module can realize the requirements of AF module miniaturization and automatic focusing function, as shown in figure 1 of the specification, the existing T-lens AF module comprises a circuit board 1-1, a base 1-2, a lens 1-3, a T-lens module 1-6 and a flexible flat cable 1-7; the base 1-2 is arranged at the upper end face of the circuit board 1-1, and the lens 1-3 is arranged at the upper end of the base 1-2; the T-Lens module 1-6 is arranged at the top end of the Lens 1-3 and is fixedly connected with the circuit board 1-1 through the glue layer 1-4, the T-Lens module 1-6 is connected with the circuit board 1-1 through the soft flat cable 1-7, the soft flat cable 1-7 is fixedly attached to the outer wall of the Lens 1-3, meanwhile, the soft flat cable 1-7 and the circuit board 1-1 are welded through the gold wires 1-5 to realize electrifying, then the T-Lens module 1-6 circuit is electrically connected with the camera module circuit board 1-1 through the soft flat cable 1-7, and the camera module changes the focal length of the Lens through the change of the surface curvature of the T-Lens module 1-6 under the electrifying state so as to realize automatic focusing. However, the T-lens module 1-6 is arranged at the top end of the camera module in the mode, so that the overall height of the camera module is increased, the T-lens module 1-6 is exposed at the outermost periphery of the camera module, protection is absent, and when the reliability drop test of the camera module is carried out, the T-lens module 1-6 is easy to fail in function due to impact, and the automatic focusing function of the camera module cannot be guaranteed.

Disclosure of Invention

The utility model aims to provide a miniaturized structure of an AF camera module, wherein a T-lens device is arranged between a photoelectric conversion module and a lens, so that the protection effect of the T-lens device is improved, the problem of impact failure is reduced, and the reliability is enhanced.

In order to solve the technical problems, the utility model adopts the following technical scheme:

an aspect of an embodiment of the present utility model provides an AF camera module miniaturization structure, including: the photoelectric conversion module is used for bearing a chip and converting an image optical signal into an electric signal; the T-lens device is arranged at the upper end of the photoelectric conversion module and is electrically connected with the photoelectric conversion module; the lens is arranged at the upper end of the T-lens device, and transmits external optical signals to the photoelectric conversion module through the T-lens device.

In some embodiments, the bottom of the lens is provided with an IR sheet, and the lens transmits external light signals to the photoelectric conversion module through the IR sheet and the T-lens device in sequence.

In some embodiments, the photoelectric conversion module includes a PCB board and a chip, the chip is disposed on an upper surface of the PCB board, and the chip is electrically connected with the PCB board through a gold wire.

In some embodiments, gaps remain between the middle of the T-lens device and the IR sheet, between the middle of the T-lens device and the photoelectric conversion module, and between the IR sheet and the lens.

In some embodiments, a light-transmitting polymeric structure is arranged in the middle of the T-lens device, the light-transmitting polymeric structure comprises a glass support, a polymer and a glass film, the polymer is arranged on the upper surface of the glass support, the glass film is attached to the upper surface of the polymer, piezoelectric films are arranged at two ends of the upper surface of the glass film, and the lens transmits external light signals to the photoelectric conversion module sequentially through the IR sheet and the light-transmitting polymeric structure.

In some embodiments, a lower surface of a periphery of the T-lens device is electrically connected with the photoelectric conversion module through a PAD, and an upper surface of the periphery of the T-lens device is connected with the lens.

In some embodiments, the periphery of the T-lens device employs a PCB substrate or a ceramic substrate.

The AF camera module miniaturized structure provided by the embodiment of the utility model has at least the following beneficial effects: the periphery of the T-lens device is made large, the middle part is of a thin light-transmitting polymeric structure, and the periphery of the T-lens device adopts a PCB substrate or a ceramic substrate, so that the T-lens device has the advantages of fast heat dissipation, corrosion resistance, high temperature resistance and the like. The traditional mode adopts the support of FF module to support the IR piece, and this application sets up the IR piece on the last ladder of lens-barrel inside wall, has replaced the support of original FF module, saves the cost. The IR sheet is directly arranged at the bottom of the lens, and the T-lens generates curvature change during normal operation, so that automatic focusing is realized. The photoelectric conversion module is respectively and electrically connected with the main control module and the T-lens device, when the automatic focusing is carried out, the main control module recognizes external image information through the photoelectric conversion module, and when the data of the external image information is not within a preset threshold value (namely, when the image is in a fuzzy state), the main control module applies focusing voltage to the piezoelectric films at the two ends of the upper surface of the glass film through the photoelectric conversion module. The larger the focusing voltage, the larger the curvature of the glass film, and the smaller the focusing voltage, the smaller the curvature of the glass film. When the focusing reaches the data of the external image information within the preset threshold (that is to say, the focusing reaches the clear image), the main control module keeps the current focusing voltage unchanged through the photoelectric conversion module, and the curvature of the glass film keeps unchanged when the focusing voltage is unchanged, so that the automatic focusing is completed. According to the method, the T-lens device is arranged between the photoelectric conversion module and the lens, the protection effect on the T-lens device is improved, the problem that the automatic focusing function is invalid due to collision of the camera module is solved, and the reliability is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a T-lens AF module in the prior art;

fig. 2 is a schematic structural diagram of an AF camera module miniaturized structure according to an embodiment;

FIG. 3 is an enlarged schematic view of a portion A according to an embodiment;

fig. 4 is a schematic view of a light-transmitting polymeric structure according to an embodiment.

The reference numerals are explained as follows: 1. a photoelectric conversion module; 2. t-lens device; 3. a lens; 4. an IR sheet; 5. a PCB board; 6. a chip; 7. a light-transmitting polymeric structure; 8. a glass support; 9. a polymer; 10. a glass film; 11. a piezoelectric film.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present utility model and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments may be embodied in many forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example embodiments to those skilled in the art. The drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus a repetitive description thereof will be omitted.

The following is a brief description of the technical solution of the embodiments of the present application:

the design scheme of the existing T-Lens AF module is that a T-Lens module is arranged at the top end of a Lens, a T-Lens module 2 is communicated with a soft flat cable through a gold wire, then the circuit is electrically connected with a circuit board of a camera module through the soft flat cable, the T-Lens module is electrified, and the focal length of the Lens is changed through the change of the surface curvature of the T-Lens module, so that automatic focusing is realized. However, the mode increases the overall height of the module by arranging the T-lens module at the top end of the camera module, exposes the T-lens module at the outermost periphery of the camera module, lacks protection, and can not ensure the automatic focusing function of the camera module due to functional failure caused by collision when the reliability drop test of the camera module is carried out.

Therefore, according to some embodiments, as shown in fig. 2, the application provides an AF camera module miniaturization structure, and the T-lens device 2 is arranged between the photoelectric conversion module 1 and the lens 3, so that the protection effect on the T-lens device is improved, the problem that the camera module fails in automatic focusing function due to impact is reduced, and the reliability is enhanced. The AF camera module miniaturized structure includes:

the photoelectric conversion module 1 is used for bearing a chip and converting an image optical signal into an electric signal;

a T-lens device 2, wherein the T-lens device 2 is arranged at the upper end of the photoelectric conversion module 1, and the T-lens device 2 is electrically connected with the photoelectric conversion module 1;

wherein the T-lens device 2 is used for auto-focusing.

And a lens 3, wherein the lens 3 is arranged at the upper end of the T-lens device 2, and the lens 3 transmits external optical signals to the photoelectric conversion module 1 through the T-lens device 2.

Based on the above embodiment, the T-lens device 2 is disposed between the photoelectric conversion module 1 and the lens 3, and is not exposed at the outermost periphery of the camera module, so as to have a protection effect, and when the reliability drop test of the camera module is performed, the problem that the automatic focusing function is invalid due to the collision of the camera module is reduced, the reliability of the miniaturized structure of the whole AF camera module is improved, and the automatic focusing function is ensured.

According to some embodiments, as shown in fig. 2, an IR sheet 4 is disposed at the bottom of the lens 3, and the lens 3 transmits external light signals to the photoelectric conversion module 1 sequentially through the IR sheet 4 and the T-lens device 2.

Based on the above embodiment, the lens 3 includes a plurality of lenses and a lens barrel, the inner side wall of the lens barrel is provided with steps, the plurality of lenses are sequentially arranged on the steps of the inner side wall of the lens barrel from top to bottom, and the IR piece 4 is arranged on the last step. In some embodiments, the IR sheet 4 and the lens 3 may be provided as a unitary lens that may be assembled directly onto the T-lens device 2. To facilitate assembly. The traditional mode adopts the support of FF module to support IR piece 4, and this application sets up IR piece 4 on the last ladder of lens-barrel inside wall, has replaced the support of original FF module, saves the cost. The IR sheet 4 serves to reflect unwanted infrared light away, remove impurities, prevent color shift, and reduce stray light.

In some embodiments, an infrared cut-off film coated on the IR sheet 4 can be coated on the T-lens device 2, and then the IR sheet 4 is not provided, saving the use cost of the IR sheet 4.

The automatic focusing principle of the T-lens device 2 is shown in fig. 2 and 4, the T-lens device 2 comprises a glass support 8, a polymer 9 and a glass film 10, the polymer 9 is arranged on the upper surface of the glass support 8, the glass film 10 is attached to the upper surface of the polymer 9, and piezoelectric films 11 are arranged at two ends of the upper surface of the glass film 10. The photoelectric conversion module 1 is electrically connected with the main control module, and when the automatic focusing is performed, the main control module recognizes external image information through the photoelectric conversion module 1, and when the data of the external image information is not within a preset threshold value (namely, when the image is in a fuzzy state), the main control module applies focusing voltage to the piezoelectric films 11 at two ends of the upper surface of the glass film 10 through the photoelectric conversion module 1. The larger the focusing voltage, the larger the curvature of the glass film 10, and the smaller the focusing voltage, the smaller the curvature of the glass film 10. When the focusing reaches the data of the external image information within the preset threshold (that is, when the focusing reaches the clear image), the main control module keeps the current focusing voltage unchanged through the control of the photoelectric conversion module 1, and the curvature of the glass film 10 keeps unchanged when the focusing voltage is unchanged, so that the automatic focusing is completed.

In other embodiments, the last lens of the lens 3 is made into a plane, the infrared cut-off film originally plated on the IR piece 4 is plated on the last lens of the lens 3, and then the IR piece 4 is not arranged, so that the use cost of the IR piece 4 is saved.

According to some embodiments, as shown in fig. 2, the photoelectric conversion module 1 includes a PCB 5 and a chip 6, and the chip 6 is disposed on an upper surface of the PCB 5.

Wherein, the chip 6 is electrically connected with the PCB 5 through gold wires.

Based on the above embodiment, after the chip 6 converts the optical signal into an electrical signal, the chip 6 transmits the electrical signal to a processor or other processing module for processing through the PCB board 5.

According to some embodiments, gaps are left between the middle of the T-lens device 2 and the IR sheet 4, between the middle of the T-lens device 2 and the photoelectric conversion module 1, and between the IR sheet 4 and the lens 3.

Based on the above embodiment, the advantage of providing a void is: when the reliability falls, the arrangement of the gaps can effectively avoid the collision between the components, so that the automatic focusing function of the camera module is invalid; preventing the contact compression between the components to generate offset light.

According to some embodiments, as shown in fig. 2 and 4, a light-transmitting polymeric structure 7 is disposed in the middle of the T-lens device 2, the light-transmitting polymeric structure 7 includes a glass support 8, a polymer 9 and a glass film 10, the polymer 9 is disposed on the upper surface of the glass support 8, the glass film 10 is attached to the upper surface of the polymer 9, a piezoelectric film 11 is disposed at two ends of the upper surface of the glass film 10, and the lens 3 transmits an external light signal to the photoelectric conversion module 1 sequentially through the IR sheet 4 and the light-transmitting polymeric structure 7.

Based on the above embodiment, the auto-focusing principle of the T-lens device 2 is shown in fig. 2 and 4, the T-lens device 2 comprises a glass bracket 8, a polymer 9 and a glass film 10, the polymer 9 is arranged on the upper surface of the glass bracket 8, the glass film 10 is attached to the upper surface of the polymer 9, and two ends of the upper surface of the glass film 10 are provided with piezoelectric films 11. The photoelectric conversion module 1 is electrically connected with the main control module, and when the automatic focusing is performed, the main control module recognizes external image information through the photoelectric conversion module 1, and when the data of the external image information is not within a preset threshold value (namely, when the image is in a fuzzy state), the main control module applies focusing voltage to the piezoelectric films 11 at two ends of the upper surface of the glass film 10 through the photoelectric conversion module 1. The larger the focusing voltage, the larger the curvature of the glass film 10, and the smaller the focusing voltage, the smaller the curvature of the glass film 10. When the focusing reaches the data of the external image information within the preset threshold (that is, when the focusing reaches the clear image), the main control module keeps the current focusing voltage unchanged through the control of the photoelectric conversion module 1, and the curvature of the glass film 10 keeps unchanged when the focusing voltage is unchanged, so that the automatic focusing is completed.

According to some embodiments, as shown in fig. 2 to 3, the lower surface of the periphery of the T-lens device 2 is electrically connected with the photoelectric conversion module 1 through PAD, and the upper surface of the periphery of the T-lens device 2 is connected with the lens 3.

Based on the above embodiment, the lower surface of the periphery of the T-lens device 2 is electrically connected with the photoelectric conversion module 1 through the PAD to realize the interaction of the electric signals. The PAD is arranged on the T-lens device 2 and the photoelectric conversion module 1, a small amount of tin is arranged on the PAD, tin can be continuously added on the PAD, welding is facilitated, then solder paste is coated on the PAD of the T-lens device 2 and the PAD of the photoelectric conversion module 1, the PAD of the T-lens device 2 and the PAD of the photoelectric conversion module 1 are placed together point to point, the PAD is heated and melted by a welding tool, and then the tin on the PAD is solidified by cooling, so that the welding of the PAD of the T-lens device 2 and the PAD of the photoelectric conversion module 1 is completed, and the electric connection of the T-lens device 2 and the photoelectric conversion module 1 is realized.

According to some embodiments, the periphery of the T-lens device 2 employs a PCB substrate or a ceramic substrate.

The periphery of the T-lens device 2 is made large, the middle part is a thin light-transmitting polymeric structure 7, and the periphery of the T-lens device 2 adopts a PCB substrate or a ceramic substrate, so that the T-lens device has the advantages of fast heat dissipation, corrosion resistance, high temperature resistance and the like. The traditional mode adopts the support of FF module to support IR piece 4, and this application sets up IR piece 4 on the last ladder of lens-barrel inside wall, has replaced the support of original FF module, saves the cost. The IR sheet 4 is directly arranged at the bottom of the lens 3, and the curvature of the T-lens is changed during normal operation, so that automatic focusing is realized. The automatic focusing principle of the T-lens device 2 is shown in fig. 2 and 4, the T-lens device 2 comprises a glass support 8, a polymer 9 and a glass film 10, the polymer 9 is arranged on the upper surface of the glass support 8, the glass film 10 is attached to the upper surface of the polymer 9, and piezoelectric films 11 are arranged at two ends of the upper surface of the glass film 10. The photoelectric conversion module 1 is electrically connected with the main control module, and when the automatic focusing is performed, the main control module recognizes external image information through the photoelectric conversion module 1, and when the data of the external image information is not within a preset threshold value (namely, when the image is in a fuzzy state), the main control module applies focusing voltage to the piezoelectric films 11 at two ends of the upper surface of the glass film 10 through the photoelectric conversion module 1. The larger the focusing voltage, the larger the curvature of the glass film 10, and the smaller the focusing voltage, the smaller the curvature of the glass film 10. When the focusing reaches the data of the external image information within the preset threshold (that is, when the focusing reaches the clear image), the main control module keeps the current focusing voltage unchanged through the control of the photoelectric conversion module 1, and the curvature of the glass film 10 keeps unchanged when the focusing voltage is unchanged, so that the automatic focusing is completed. According to the method, the T-lens device 2 is arranged between the photoelectric conversion module 1 and the lens 3, so that the protection effect on the T-lens device is improved, the problem that the automatic focusing function is invalid due to collision of the camera module is solved, and the reliability is enhanced.

In the description of the above embodiments, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

While the present disclosure has been described with reference to several exemplary embodiments, it is understood that the terminology used is intended to be in the nature of words of description and illustration rather than of limitation. As the present disclosure may be embodied in several forms without departing from the spirit or essential attributes thereof, it should be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the metes and bounds of the claims, or equivalences of such metes and bounds are therefore intended to be embraced by the appended claims.

Claims (6)

1. The utility model provides a miniaturized structure of AF camera module, its characterized in that, miniaturized structure of AF camera module includes:

the photoelectric conversion module is used for bearing a chip and converting an image optical signal into an electric signal;

the T-lens device is arranged at the upper end of the photoelectric conversion module and is electrically connected with the photoelectric conversion module;

the lens is arranged at the upper end of the T-lens device, the lens transmits external light signals to the photoelectric conversion module through the T-lens device, the lens comprises a plurality of lenses and a lens barrel, the inner side wall of the lens barrel is provided with steps, and the lenses are sequentially arranged on the steps on the inner side wall of the lens barrel from top to bottom;

an IR sheet is arranged at the bottom of the lens, and the IR sheet is arranged on the last step of the inner side wall of the lens barrel; the lens transmits external light signals to the photoelectric conversion module through the IR sheet and the T-lens device in sequence.

2. The AF camera module miniaturized structure according to claim 1, wherein the photoelectric conversion module includes a PCB board and a chip, the chip is disposed on an upper surface of the PCB board, and the chip is electrically connected with the PCB board through a gold wire.

3. The AF camera module miniaturization structure according to claim 1, wherein gaps are left between a middle portion of the T-lens device and the IR sheet, between a middle portion of the T-lens device and the photoelectric conversion module, and between the IR sheet and the lens.

4. The AF camera module miniaturized structure according to claim 3, wherein a light-transmitting polymeric structure is arranged in the middle of the T-lens device, the light-transmitting polymeric structure comprises a glass bracket, a polymer and a glass film, the polymer is arranged on the upper surface of the glass bracket, the glass film is attached to the upper surface of the polymer, piezoelectric films are arranged at two ends of the upper surface of the glass film, and the lens transmits external light signals to the photoelectric conversion module sequentially through an IR sheet and the light-transmitting polymeric structure.

5. The AF camera module miniaturization structure according to claim 4, wherein a lower surface of a periphery of the T-lens device is electrically connected with a photoelectric conversion module through a PAD, and an upper surface of the periphery of the T-lens device is connected with the lens.

6. The AF camera module miniaturization structure according to claim 5, wherein the periphery of the T-lens device adopts a PCB substrate or a ceramic substrate.