CN113194220A

CN113194220A - Camera module and electronic product

Info

Publication number: CN113194220A
Application number: CN202010301757.XA
Authority: CN
Inventors: 谭建华; 徐爱新
Original assignee: Kunshan Q Technology Co Ltd
Current assignee: Kunshan Q Technology Co Ltd
Priority date: 2020-01-14
Filing date: 2020-04-16
Publication date: 2021-07-30
Also published as: CN111083342A

Abstract

The invention provides a camera module and an electronic product, the camera module comprises a circuit board, a photosensitive element, a lens component, a mounting seat, a light guide component, a light source component and a cover plate, wherein the photosensitive element and a base are arranged on the circuit board, the photosensitive element is electrically connected with the circuit board, the lens component is arranged on the mounting seat, the lens component is arranged on one side of the photosensitive element far away from the circuit board, the light guide component is arranged on the outer side of the lens component, the top of the light guide component far away from the circuit board is provided with a top surface, the light source component and the light guide component are arranged adjacently, and the cover plate is arranged on the top of the light guide component in a covering manner of being covered on one side of the lens component far away from the photosensitive element. In the camera module and the electronic product provided by the invention, the distance between the cover plate and the first lens component and the distance between the cover plate and the second lens component are controllable in the manufacturing process of the camera module, so that the height of the whole camera module can be reduced, and the camera module is light, thin and small.

Description

Camera module and electronic product

Technical Field

The invention relates to the technical field of imaging, in particular to a camera module and an electronic product.

Background

With the progress of science and technology, the application of the camera is more and more extensive, and at present, except cameras, mobile phones, computers and other electronic products are equipped with the camera, so that people can take pictures at any time and any place conveniently, and convenience and fun are brought to the life of people. At present, various electronic products, such as portable electronic products like mobile phones, cameras, tablet computers, etc., have increasingly thinner thicknesses, higher screen occupation ratios, and higher pixels, and thus, smaller and thinner requirements are also put forward on camera modules. Although the fixed-focus camera module has a small size, the focusing distance is limited, and the requirement of people on high pixels cannot be met. The zoom camera module has a larger thickness due to the higher and higher pixels, and the thickness of the electronic product is thinner and thinner, so that the camera module protrudes from the surface of the electronic product, which seriously affects the appearance of the electronic product. Under the condition that the cameras are more and more popular, people have more and more requirements on the functions of the cameras, and the ultra-micro distance camera is a development direction at present. In order to be able to photograph the detailed characteristics of an object at a short distance, the ultra-micro distance camera is needed, and the thickness of the ultra-micro distance camera is larger, which is difficult to satisfy the light and thin requirements of people.

Disclosure of Invention

The invention aims to provide an ultra-micro camera module with small thickness and an electronic product.

The invention provides a camera module, which comprises a circuit board, a photosensitive element, a lens component, a mounting seat, a light guide piece, a light source component and a cover plate, wherein the photosensitive element and a base are arranged on the circuit board, the photosensitive element is electrically connected with the circuit board, the lens component is arranged on the mounting seat, the lens component is arranged on one side, away from the circuit board, of the photosensitive element, the light guide piece is arranged on the outer side of the lens component, the top, away from the circuit board, of the light guide piece is provided with a top surface, the light source component and the light guide piece are arranged adjacently, and the cover plate is covered on the top of the light guide piece and is positioned on one side, away from the photosensitive element, of the lens component.

In one embodiment, the cover plate is closely attached to the top surface of the light guide.

In one embodiment, the light guide member includes an upper portion and a lower portion, a step surface is formed at a joint of the upper portion and the lower portion, and the step surface is closely attached to the top surface of the mounting seat.

In one embodiment, the light source assembly is disposed at the bottom of the light guide member, and the light guide member is annular and surrounds the entire outer side of the lens assembly.

In one embodiment, the camera module further includes a protrusion protruding out of the top surface to form an accommodating groove at the top of the light guide, and the cover plate is accommodated in the accommodating groove.

In one embodiment, the light source assembly includes a plurality of light sources, and the plurality of light sources are circumferentially disposed at the bottom of the light guide.

In one embodiment, the light source assembly further includes a bottom plate, the plurality of light sources are fixed on the bottom plate, the bottom plate is fixed relative to the mounting seat, the bottom plate is a circuit board, and the light sources are electrically connected to the bottom plate.

In one embodiment, the lens assembly includes a first lens assembly and a second lens assembly, the mounting base includes a driving device and a base, the base is disposed on the circuit board, the base forms a cavity, the photosensitive element is accommodated in the cavity, the first lens assembly is disposed on the base, the second lens assembly is disposed on the driving device, the driving device is disposed on one side of the circuit board away from the base, and the second lens assembly is disposed on one side of the photosensitive element away from the first lens assembly.

In one embodiment, the first lens component is a fixed focus lens, and the second lens component is a zoom lens.

In one embodiment, the light guide member is fixed to an outer side of the driving device, and the step surface is closely attached to a top surface of the driving device.

The invention further provides an electronic product which comprises a machine shell and the camera module, wherein the camera module is fixed on the machine shell.

In the camera module and the electronic product provided by the invention, the distance between the cover plate and the first lens component and the distance between the cover plate and the second lens component are controllable in the manufacturing process of the camera module, so that the height of the whole camera module can be reduced, and the camera module is light, thin and small.

Drawings

Fig. 1 is a perspective assembly view of a camera module according to an embodiment of the invention.

Fig. 2 is an exploded perspective view of the camera module shown in fig. 1.

Fig. 3 is a sectional view of the camera module shown in fig. 1.

Fig. 4 is a schematic structural diagram of a second lens assembly of the camera module shown in fig. 1.

Fig. 5 is a flowchart of a method for manufacturing a camera module according to an embodiment of the invention.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the present invention will be made with reference to the accompanying drawings and examples.

As shown in fig. 1 to 3, the camera module according to an embodiment of the present invention includes a circuit board 11, a photosensitive element 13, a base 15, an optical filter 17, a first lens assembly 19, a second lens assembly 21, a driving device 23, a light guide 25, a light source assembly 27, and a cover plate 29.

In this embodiment, the photosensitive element 13 and the base 15 are both disposed on the circuit board 11, the base 15 forms a cavity 152, and the photosensitive element 13 is accommodated in the cavity 152. Specifically, the wiring board 11 may be a flexible circuit board. The photosensitive element 13 may be a photosensitive chip, such as a CCD (Charge Coupled Device) photosensitive chip or a CMOS (Complementary Metal Oxide Semiconductor) photosensitive chip. The photosensitive element 13 is electrically connected to the circuit board 11 to transmit the electrical signal to the circuit board 11. The inner wall of the base 15 is formed with a fixing stand 154 protruded inward.

In this embodiment, the filter 17 is disposed on the fixing stage 154, and the filter 17 is located between the photosensitive element 13 and the first and

second lens assemblies

19 and 21. In this embodiment, the filter 17 is provided below the fixing stage 154. It is understood that the filter 17 may also be positioned above the fixed stage 154. The filter 1 may be fixed on the fixing stage 154 by glue.

In this embodiment, the first lens assembly 19 is disposed on the base 15. Specifically, the first lens assembly 19 includes a first lens group and a first lens barrel, the first lens group is assembled in the first lens barrel, an external thread is disposed on an outer side of the first lens barrel, an internal thread is disposed on an inner wall of the base 15, and the first lens assembly 19 is fixed in the base 15. The first lens assembly 19 is a fixed focus lens.

In this embodiment, the second lens assembly 21 is disposed on the driving device 23, and the driving device 23 is disposed on the base 15, so that the second lens assembly 21 is located on a side of the first lens assembly 19 away from the photosensitive element 13. Specifically, the driving device 23 is provided on a side of the base 15 away from the wiring board 11. The second lens assembly 21 is a zoom lens.

The second lens assembly 21 includes a second lens group and a second lens barrel, and the second lens group is assembled in the second lens barrel. An extension 212 protrudes downward from the bottom edge of the second barrel, and the extension 212 is engaged with the driving device 23. Since the bottom of the second barrel is provided with the extension portion 212, the height of the second lens assembly 21 combined with the driving device 23 is increased, and the combination strength of the second lens assembly 21 and the driving device 23 is improved. Correspondingly, one end of the first lens assembly 19, which is far away from the circuit board 11, protrudes into the space surrounded by the extension 212 of the second lens assembly 21, and a relief portion is formed corresponding to the position of the extension 212.

Referring to fig. 4, the outer sidewall of the second lens assembly 21 is formed with a first groove 214, the inner sidewall of the driving device 23 is formed with a second groove 232, and the portion of the second lens assembly 21 formed with the first groove 214 corresponds to the portion of the driving device 23 formed with the second groove 232. Due to the arrangement of the first groove 214 and the second groove 232, when the second lens assembly 21 is connected to the driving device 23 by glue, the glue flows into the first groove 214 and the second groove 232, and the solidified glue is toothed, so that the bonding strength between the second lens assembly 21 and the driving device 23 can be improved. Specifically, the first groove 214 is opened on the second barrel.

Specifically, the first groove 214 is recessed inward along the outer peripheral surface of the second lens assembly 21 in an annular shape, and the second groove 232 is recessed inward in an annular shape from the inner side wall surface of the driving device 23 in the circumferential direction. The width of the first groove 214 is larger than that of the second groove 232 along the direction of the optical axis of the second lens assembly 21, and/or the first groove 214 and the second groove 232 are staggered.

In one embodiment, the first groove 214 may also be formed on the outer peripheral surface of the extension 212 of the second lens assembly 21.

The outer side wall of the second lens assembly 21 is further provided with a notch 216. At the location of the cut-out 216, the gap between the outer sidewall of the second lens assembly 21 and the inner sidewall of the drive device 23 increases, facilitating the glue to flow down, thereby substantially filling the gap between the second lens assembly 21 and the drive device 23. Specifically, the second lens assembly 21 has a plurality of notches 216 disposed at intervals, and the notches 216 communicate the first recess 214 and the second recess 232 and form an opening toward a side away from the circuit board 11. Specifically, the notch 216 is formed at a position of the second lens assembly 21 where the first groove 214 is formed. More specifically, the plurality of cutouts 216 are evenly provided on the second lens assembly 21 in the circumferential direction.

The outer side wall of the second lens assembly 21 is provided with a gate 218, and the gate 218 and the notch 216 are arranged in a staggered manner in the circumferential direction of the second lens assembly 21.

In this embodiment, the driving device 23 may be a voice coil motor. Of course, the driving device 23 can also be a driving device made of memory alloy, as long as it can move the second lens assembly 21 up and down for zooming. Specifically, voice coil motor includes casing, magnet, carrier and coil, and on the casing was located to the magnet, the coil was located on the carrier, and second camera lens subassembly 21 was fixed in on the carrier, through to the coil circular telegram, under the effect of magnet, can produce magnetic force and promote the relative casing rectilinear movement of carrier, realizes the focusing to second camera lens subassembly 21. Specifically, the housing is fixed to the base 15. The second recess 232 opens onto the carrier.

In this embodiment, the light guide 25 is disposed outside the second lens assembly 21, and the light guide 25 is annular and surrounds the entire outside of the second lens assembly 21. The light guide piece 25 guides light rays to the optical axis of the second lens assembly 21, so that light can be supplemented to the camera module, and the imaging effect of the camera module is improved; in addition, the light guide member 25 annularly surrounds the second lens assembly 21, so that the uniformity of light supplement is good, and the imaging effect of the camera module is further improved. Specifically, the light guide 25 is fixed outside the driving device 23 and partially exposed at the top of the driving device 23, and the second lens assembly 21 is partially exposed at the top of the driving device 23.

The light guide 25 includes an upper portion 250 and a lower portion 251, a step surface 253 is formed at a junction of the upper portion 250 and the lower portion 251, and the step surface 253 is closely attached to the top surface of the driving device 23. Specifically, the upper portion 250 is located above the driving device 23, and the lower portion 251 is located outside the driving device 23. Because step surface 253 closely laminates with drive arrangement 23's top surface, consequently steerable whole camera module's height is favorable to the frivolous, the miniaturization of camera module.

The top inner side of the light guide 25 is provided with an inclined side surface 252, and the side surface 252 faces the light incident side of the second lens assembly 21. The angled side surfaces 252 may better direct light rays toward the optical axis of the second lens assembly 21. Specifically, in the present embodiment, the side surface 252 is a conical surface.

The top of the light guide 25, remote from the circuit board 11, is provided with a top surface 254. The light guide 25 also includes a protrusion 256 that protrudes out of the top surface 254 to form a receiving groove at the top of the light guide 25. The top of the second lens assembly 21 is closer to the circuit board 11 than the top surface 254, that is, the second lens assembly 21 is not higher than the top surface 254 of the light guide 25. Specifically, the top surface 254 is perpendicular to the optical axis of the lens assembly. In other embodiments, the protrusion 256 may be disposed on the housing of the electronic product; alternatively, the protrusion 256 may be provided separately. Specifically, the boss 256 may be a fixing ring to mount the cover plate 29.

In this embodiment, the light source assembly 27 is disposed at the bottom of the light guide 25. Like this, the light of light source subassembly 27 can get into leaded light spare 25 better, realizes better light supplementation effect to improve the formation of image effect of camera module. Specifically, the light source assembly 27 includes a plurality of light sources 272 and a bottom plate 274, the plurality of light sources 272 are circumferentially disposed at the bottom of the light guide 25, the plurality of light sources 272 are fixed on the bottom plate 274, and the bottom plate 274 is fixed relative to the base 15. More specifically, the plurality of light sources 272 are uniformly provided in the bottom of the light guide 25 in the circumferential direction. The light source 272 is located outside the driving device 23 and the base 15. Specifically, the light source 272 may be an LED or other types of light sources, the bottom plate 274 is a circuit board, and the light source 272 is electrically connected to the bottom plate 274 and supplies power and controls on and off through the bottom plate 274.

In this embodiment, the cover plate 29 covers the top of the light guide 25 and is located on a side of the second lens assembly 21 away from the light sensing element 13 to protect the first lens assembly 19 and the second lens assembly 21 and prevent the lens assemblies from being contaminated or damaged. Specifically, the cover plate 29 is closely attached to the top surface 254 of the light guide 25 and is received in the receiving groove. First, since the cover plate 29 for protecting the first lens assembly 19 and the second lens assembly 21 is a part of the camera module and can be pre-installed on the camera module, the distance between the cover plate 29 and the first lens assembly 19 and the second lens assembly 21 in this embodiment can be controlled during the manufacture of the camera module, compared with the case where the camera module is installed on a mobile phone housing during the assembly of a mobile phone or the like, which can reduce the height of the whole camera module, and is beneficial to the lightness, thinness and miniaturization of the camera module. The cover plate 29 is tightly attached to the top surface 254, so that the gap h between the top of the second lens assembly 21 and the cover plate 29 is small enough, the height of the whole camera module is reduced, and the camera module is light, thin and small. Specifically, the cover plate 29 is a glass cover plate.

It can be understood that the light guide 25 can be applied to only one lens assembly or a camera module with three or more lens assemblies, except for the camera module with two lens assemblies applied to the embodiment, and the light guide 25 can play a role of light supplement without limitation. The first lens assembly 19 and the second lens assembly 21 may also be both fixed focus lenses or both zoom lenses. For example, when the second lens assembly 21 is a fixed focus lens, the driving device 23 can be replaced by the base 15, that is, the second lens assembly 21 is also mounted on the base 15, and then the light guide 25 is fixed outside the base 15 and partially exposed on the top of the base 15, and the step surface 253 of the light guide 25 is closely attached to the top surface of the base 15. That is, the light guide 25 may be mounted on a mount such as a drive device or a chassis so as to correspond to the lens unit.

The invention also provides an electronic product which comprises a shell and the camera module, wherein the camera module is fixed on the shell.

Since the camera module of the present invention is an ultra-macro lens, the distance between the upper surface of the second lens assembly 21 and the cover plate 29 needs to be strictly controlled, otherwise, no image can be formed. Therefore, when the camera module is installed, the camera module can be reversely buckled and installed on the rear cover of the electronic product, so that the distance can be controlled, and the assembly tolerance is reduced.

The invention also provides a camera module manufacturing method, which is used for manufacturing the camera module. Referring to fig. 5, the method for manufacturing the camera module includes the following steps:

and S11, providing the circuit board 11 and the photosensitive element 13, arranging the photosensitive element 13 on the circuit board 11, and electrically connecting the photosensitive element 13 to the circuit board 11 to transmit the electric signal to the circuit board 11. Specifically, the wiring board 11 may be a flexible circuit board. The photosensitive element 13 may be a photosensitive chip, such as a CCD (Charge Coupled Device) photosensitive chip or a CMOS (Complementary Metal Oxide Semiconductor) photosensitive chip. When the photosensitive element 13 is electrically connected to the circuit board 11, the bonding can be performed by gold wire bonding. When the circuit board 11 is provided, a circuit substrate is formed by SMT (surface mount technology) mounting technology, and then the circuit substrate is cut and typeset to form the circuit board 11.

S13, providing the base 15 and the filter 17, disposing the filter 17 on the base 15, disposing the base 15 on the circuit board 11, and mounting the first lens assembly 19 on the base 15. Specifically, a fixing stage 154 protruding inward is formed on the inner wall of the base 15, and the filter 17 is disposed on the fixing stage 154, such that the filter 17 is located on the side of the photosensitive element 13 away from the circuit board 11. The first lens assembly 19 may be a fixed focus lens. The first lens assembly 19 can be screwed into the fixing base 15 and fixed by dispensing. In step S13, the mounted component is also baked to quickly cure the glue.

S15, the first lens assembly 19 is debugged. Specifically, the first lens assembly 19 is focused. Step S15 also includes cleaning the assembled components.

S17, providing the second lens assembly 21 and the driving device 23, and mounting the second lens assembly 21 on the driving device 23. Specifically, the second lens assembly 21 may be a zoom lens. Specifically, the second lens assembly 21 is fixed to the driving device 23 by glue. The driving device 23 may be a voice coil motor, and specifically, the voice coil motor includes a housing, a magnet, a carrier, and a coil, the magnet is disposed on the housing, the coil is disposed on the carrier, and the second lens assembly 21 is fixed on the carrier. In step S17, the method further includes cleaning the driving device 23 before mounting the second lens assembly 21 on the driving device 23, baking the assembled driving device 23 and the second lens assembly 21 after mounting the second lens assembly 21 on the driving device 23, and cleaning the second lens assembly 23 after baking.

Specifically, the outer side wall of the second lens assembly 21 is provided with a first groove 214, the inner side wall of the driving device 23 is provided with a second groove 232, and the portion of the second lens assembly 21 provided with the first groove 214 corresponds to the portion of the driving device 23 provided with the second groove 232. The outer side wall of the second lens assembly 21 is further provided with a notch 216. The second lens assembly 21 has a plurality of notches 216 disposed at intervals, and more specifically, the plurality of notches 216 are uniformly disposed on the second lens assembly 21 along the circumferential direction. The notch 216 is formed at a position of the second lens module 21 where the first groove 214 is formed. In step S17, glue is injected from the cut 216 and flows into the first groove 214 and the second groove 232, so as to sufficiently fill the gap between the second lens assembly 21 and the driving device 23.

S19, the driving device 23 with the second lens assembly 21 is mounted on the base 15. Specifically, the driving device 23 is provided on a side of the base 15 away from the wiring board 11. In step S19, baking is performed after the driving device 23 is mounted on the base 15 to dry the glue.

S21, performing a function test on the first lens assembly 19 and the second lens assembly 21. Specifically, the focal lengths of the first lens assembly 19 and the second lens assembly 21 are tested to determine whether they meet requirements.

S23, providing the light guide 25 and the light source module 27, and installing the light guide 25 on the outer side of the second lens module 21. Specifically, the light guide 25 is ring-shaped, surrounds the entire outside of the second lens assembly 21, and the light source assembly 27 is disposed at the bottom of the light guide 25.

Specifically, the light guide 25 includes an upper portion 250 and a lower portion 251, a step surface 253 is formed at a junction of the upper portion 250 and the lower portion 251, and the step surface 253 is closely attached to the top surface of the driving device 23. Specifically, the upper portion 250 is located above the driving device 23, and the lower portion 251 is located outside the driving device 23.

S25, providing a cover plate 29, and covering the cover plate 29 on the top of the light guide 25 and on the side of the second lens assembly 21 away from the light sensing element 13, thereby assembling the camera module. Specifically, the cover plate 29 is closely attached to the top surface 254 of the light guide 25. Specifically, the cover plate 29 is a glass cover plate.

And S27, performing function test on the camera module. Specifically, the camera module after the light guide 25 is assembled is tested to test the performance of the light guide 25. In step S27, the method further includes performing appearance inspection and packaging and warehousing on the camera module.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A camera module comprises a circuit board (11), a photosensitive element (13) and a lens assembly, and is characterized in that the camera module further comprises a mounting seat, a light guide piece (25), a light source assembly (27) and a cover plate (29), the photosensitive element (13) and a base (15) are arranged on the circuit board (11), the photosensitive element (13) is electrically connected with the circuit board (11), the lens assembly is arranged on the mounting seat, the lens assembly is arranged on one side of the photosensitive element (13) far away from the circuit board (11), the light guide piece (25) is arranged outside the lens assembly, the top of the light guide piece (25) far away from the circuit board (11) is provided with a top surface (254), the light guide piece (25) is arranged adjacently, and the cover plate (29) is arranged at the top of the light guide piece (25), and is positioned on one side of the lens assembly away from the photosensitive element (13).

2. The camera module of claim 1, wherein the cover plate (29) is closely attached to the top surface (254) of the light guide (25).

3. The camera module according to claim 1, wherein the light guide member (25) comprises an upper portion (250) and a lower portion (251), a step surface (253) is formed at a joint of the upper portion (250) and the lower portion (251), and the step surface (253) is closely attached to the top surface of the mounting seat.

4. The camera module according to claim 1, wherein the light source assembly (27) is disposed at a bottom of the light guide (25), and the light guide (25) is annular and surrounds an outer side of the lens assembly.

5. The camera module of claim 1, further comprising a protrusion (256) protruding out of the top surface (254) to form a receiving groove at the top of the light guide (25), the cover plate (29) being received in the receiving groove.

6. The camera module according to claim 1, wherein the light source assembly (27) comprises a plurality of light sources (272), and the plurality of light sources (272) are circumferentially disposed at the bottom of the light guide (25).

7. The camera module according to claim 6, wherein the light source assembly (27) further comprises a base plate (274), the plurality of light sources (272) are fixed on the base plate (274), the base plate (274) is fixed relative to the mounting seat, the base plate (274) is a circuit board, and the light sources (272) are electrically connected to the base plate (274).

8. The camera module of claim 2, wherein the lens assembly includes a first lens assembly (19) and a second lens assembly (21), the mount includes a driving device (23) and a base (15), the base (15) is disposed on the circuit board (11), the base (15) forms a cavity (152), the photosensitive element (13) is received in the cavity (152), the first lens assembly (19) is disposed on the base (15), the second lens assembly (21) is disposed on the driving device (23), the driving device (23) is disposed on a side of the base (15) away from the circuit board (11), and the second lens assembly (21) is disposed on a side of the first lens assembly (19) away from the photosensitive element (13).

9. The camera module of claim 8, wherein the first lens component (19) is a fixed focus lens and the second lens component (21) is a zoom lens.

10. The camera module according to claim 8, wherein the light guide member (25) is fixed to an outer side of the driving unit (23), and the step surface (253) is closely attached to a top surface of the driving unit (23).

11. An electronic product comprising a housing, wherein the electronic product further comprises the camera module according to any one of claims 1 to 10, and the camera module is fixed on the housing.