CN219980943U - Light-isolation heat-dissipation structure and camera module - Google Patents

Abstract

The utility model relates to a light-isolation heat-dissipation structure and a camera module, which can be used for improving the heat dissipation performance of the module while isolating stray light, thereby being beneficial to improving the image quality of the module. The light-insulating heat-dissipating structure comprises: a housing having a light window for corresponding to the light source assembly and the lens assembly; a circuit board assembly mounted within the housing, and including a first circuit board for electrically mounting the light source assembly and a second circuit board for electrically mounting the lens assembly; and a light-insulating and heat-conducting member thermally connecting the first circuit board and the housing and blocking a gap between the first circuit board and the housing to form a parasitic light-insulating space between the first circuit board and the housing for accommodating the light source assembly.

Description

Light-isolation heat-dissipation structure and camera module

Technical Field

The utility model relates to the technical field of camera shooting, in particular to a light-isolating and heat-radiating structure and a camera shooting module.

Background

With the development of times and economy, the trend of automobile automation and intellectualization makes the vehicle-mounted camera more important, and drivers also rely on the vehicle-mounted camera to carry out auxiliary driving, such as blind area detection, collision early warning, automatic driving or in-cabin monitoring, and the like. With more cameras installed on automobiles, the reliability design requirements for vehicle-mounted cameras are increasing.

An infrared camera is one of the existing commonly used vehicle-mounted cameras and is often applied to the inside of a cab. Because the interior of the cab is relatively dim, the camera is usually required to be provided with an infrared lamp panel inside the shell for light supplementing, but due to factors such as assembly errors or structural interference prevention, a gap is often formed between the infrared lamp panel and the shell; the infrared lamp can generate stray light during light supplementing, and the stray light can pass through a gap between the lamp panel and the shell and be reflected into the lens, so that the problems of image blurring and the like are easily caused, and inaccurate monitoring and identification are caused. In addition, the infrared lamp panel also can produce a large amount of heat when luminous, leads to the module temperature too high easily, also can influence the image quality of module.

Disclosure of Invention

One advantage of the present utility model is to provide a light-insulating heat-dissipating structure and a camera module, which can improve the heat-dissipating performance of the module while isolating stray light, and is helpful for improving the image quality of the module.

Another advantage of the present utility model is to provide a light-blocking and heat-dissipating structure and an image capturing module, wherein in one embodiment of the present utility model, the light-blocking and heat-dissipating structure is capable of isolating a light source assembly and a lens assembly from each other inside a housing, such that stray light is isolated outside the lens assembly; meanwhile, the heat dissipation of the module can be increased, and the image quality of the module is guaranteed.

Another advantage of the present utility model is to provide an imaging module in which expensive materials or complex structures are not required in the present utility model in order to achieve the above object. Therefore, the utility model successfully and effectively provides a solution, not only provides a simple camera module, but also increases the practicability and reliability of the camera module.

To achieve at least one of the above or other advantages and objects of the utility model, the present utility model provides a light blocking and heat dissipating structure for mounting a light source assembly and a lens assembly, the light blocking and heat dissipating structure comprising:

a housing having a light window for corresponding to the light source assembly and the lens assembly;

a circuit board assembly mounted within the housing, and including a first circuit board for electrically mounting the light source assembly and a second circuit board for electrically mounting the lens assembly; and

the light-isolating and heat-conducting piece can be connected with the first circuit board and the shell in a heat-conducting way, and a gap between the first circuit board and the shell is blocked, so that a parasitic light isolation space for accommodating the light source assembly is formed between the first circuit board and the shell.

According to one embodiment of the present utility model, the light-insulating and heat-conducting member is a heat-conducting paste.

According to one embodiment of the present utility model, the heat conductive paste has a ring-shaped structure for being disposed around the light source assembly on the first wiring board; the heat conductive mud has one of a square ring section, a rectangular ring section, a circular ring section, an elliptical ring section, a trapezoidal ring section, and a triangular ring section.

According to one embodiment of the utility model, the heat conductive paste is a molded part and is fixedly mounted to the first circuit board or the housing.

According to an embodiment of the present utility model, the fixing manner between the heat-conducting paste and the first circuit board or the housing is one of glue bonding, thermal compression and welding.

According to one embodiment of the utility model, a structural interference gap exists between the heat conductive mud and the housing.

According to one embodiment of the present utility model, the housing includes an upper case provided with an opening, a lower case connected to the upper case, and a light transmitting member provided at the opening of the upper case to form the light window; the light-insulating and heat-conducting member is arranged between the upper shell and the first circuit board to form the stray light isolation space.

According to an embodiment of the present utility model, the upper case has a first opening for corresponding to the light source assembly and a second opening for corresponding to the lens assembly, the first opening and the second opening being arranged at a spacing so as to leave a case partition thermally connected to the light-blocking heat conductive member between the first opening and the second opening.

According to an embodiment of the present utility model, the first wiring board is electrically connected to the second wiring board, and the first wiring board is stacked above the second wiring board.

According to another aspect of the present utility model, there is further provided an image capturing module including:

a light source assembly;

a lens assembly; and

the light-blocking and heat-dissipating structure according to any one of the above, wherein the light source assembly and the lens assembly are correspondingly mounted to the light-blocking and heat-dissipating structure.

Drawings

Fig. 1 is a schematic structural diagram of an image capturing module according to an embodiment of the present utility model;

fig. 2 shows a modified example of the image pickup module according to the above embodiment of the present utility model.

Description of main reference numerals: 1. a camera module; 10. a light-isolating and heat-dissipating structure; 100. stray light isolation space; 11. a housing; 110. a light window; 111. an upper housing; 1111. a first opening; 1112. a second opening; 1113. a shell partition; 112. a lower housing; 113. a light transmitting member; 12. a circuit board assembly; 121. a first circuit board; 122. a second circuit board; 13. a light-blocking heat-conducting member; 130. heat conducting mud; 20. a light source assembly; 30. and a lens assembly.

The foregoing general description of the utility model will be described in further detail with reference to the drawings and detailed description.

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.

It is noted that when an element is referred to as being "mounted to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "or/and" as used herein includes any and all combinations of one or more of the associated listed items.

Considering that the existing vehicle-mounted camera is usually due to assembly errors or structural interference prevention factors, gaps often exist between the infrared lamp panel and the shell; and stray light generated by the infrared lamp during light filling can pass through a gap between the lamp panel and the shell and be reflected into the lens, so that the problems of image blurring and the like are easily caused, and inaccurate monitoring and identification are caused. In addition, the infrared lamp panel also can produce a large amount of heat when luminous, leads to the module temperature too high easily, also can influence the image quality of module. The utility model provides a light-isolating heat-radiating structure and a camera module, which can isolate stray light and improve the heat-radiating performance of the module, thereby being beneficial to improving the image quality of the module.

Specifically, referring to fig. 1, an embodiment of the present utility model provides an image capturing module 1, which may include a light blocking and heat dissipating structure 10, a light source assembly 20, and a lens assembly 30, wherein the light source assembly 20 and the lens assembly 30 are correspondingly mounted to the light blocking and heat dissipating structure 10.

More specifically, as shown in fig. 1, the light-blocking and heat-dissipating structure 10 may include a housing 11, a circuit board assembly 12 mounted within the housing 11, and a light-blocking and heat-conducting member 13. The housing 11 has an optical window 110 for corresponding to the light source module 20 and the lens module 30 such that an optical signal emitted from the light source module 20 can propagate to an external target through the optical window 110, and the lens module 30 can receive an optical signal reflected back through the external target through the optical window 110 to image. The wiring board assembly 12 includes a first wiring board 121 for electrically mounting the light source assembly 20 and a second wiring board 122 for electrically mounting the lens assembly 30. The light-blocking and heat-conducting member 13 can be connected with the first circuit board 121 and the housing 11 in a heat-conducting manner, and seals a gap between the first circuit board 121 and the housing 11 to form a parasitic light-blocking space 100 between the first circuit board 121 and the housing 11 for accommodating the light source assembly 20, such that the lens assembly 30 is located in the housing 11 and outside the parasitic light-blocking space 100.

It should be noted that, on the one hand, since the light-blocking and heat-conducting member 13 of the present utility model blocks the gap between the first circuit board 121 and the housing 11 to form the stray light isolation space 100 between the first circuit board 121 and the housing 11, the light source assembly 20 mounted on the first circuit board 121 in the camera module 1 of the present utility model is located in the stray light isolation space 100, and the lens assembly 30 mounted on the second circuit board 122 is located outside the stray light isolation space, so that stray light emitted from the light source assembly 20 can be effectively isolated to be blocked from being received by the lens assembly 30, thereby affecting the image quality; on the other hand, since the heat insulating and conducting member 13 of the present utility model can also connect the first circuit board 121 and the housing 11 in a heat conducting manner, the heat generated by the light source assembly 20 in the camera module 1 of the present utility model during light emission can be conducted to the heat insulating and conducting member 13 through the first circuit board 121 and then conducted to the housing 11 through the heat insulating and conducting member 13, so as to increase the heat dissipation area, thereby improving the heat dissipation performance of the module.

Illustratively, as shown in fig. 1, the light-blocking and heat-conducting member 13 may be implemented as a heat-conducting paste 130, so as to fill the gap between the first circuit board 121 and the housing 11, thereby reducing the thermal resistance between the light-blocking and heat-conducting member 13 and the first circuit board 121 and the housing 11, respectively, while better forming the parasitic light-blocking space 100, and ensuring a better heat dissipation performance of the module.

Alternatively, the thermally conductive paste 130 may be implemented as an inorganic paste or an organic paste, the material of which may include, but is not limited to, metals and/or non-metals. In other words, the heat conductive paste 130 according to the present utility model may be made of a single material such as metal or nonmetal, or may be made of a mixed material composed of metal and nonmetal, and the heat conductive coefficient of the heat conductive paste 130 is not limited in the present utility model.

Optionally, the heat-conducting paste 130 has a ring structure, so as to be disposed around the light source assembly 20 on the first circuit board 121, so as to block stray light emitted to the periphery via the light source assembly 20, thereby forming a stray light isolation space 100 with better light isolation performance between the first circuit board 121 and the housing 11, and preventing stray light from bypassing the heat-conducting paste 130 to be reflected into the lens assembly 30.

It should be noted that the heat conductive paste 130 of the present utility model may have, but is not limited to, a square ring section, a rectangular ring section, a circular ring section, an elliptical ring section, a trapezoid ring section or a triangular ring section, so long as the heat conductive paste 130 can have a ring structure, which is not described herein. The color of the heat conductive paste 130 of the present utility model may be, but not limited to, various colors such as red, orange, yellow, green, and gray, and the present utility model is not limited as long as it has light blocking and heat conductive functions.

Alternatively, the heat conductive paste 130 may be formed as a molded part and fixedly mounted to the first circuit board 121 or the housing 11 for subsequent assembly to form the camera module 1.

Illustratively, the heat conductive paste 130 is fixedly mounted on the first circuit board 121 to be located around the light source assembly 20, and then other components are assembled to form the camera module 1. It should be understood that in other examples of the present utility model, the heat-conducting paste 130 may be fixedly installed on the housing 11, and then other parts are assembled to form the camera module 1, which is not described in detail herein.

Alternatively, the molding process of the heat conductive paste 130 may be implemented as, but not limited to, an injection molding process, a metal powder molding process, a 3D printing process, a machining process, or the like.

Optionally, the heat conductive paste 130 may be, but is not limited to, fixed to the first circuit board 121 or the housing 11 by glue bonding, thermal compression, or welding.

Optionally, a structural interference gap exists between the heat conductive paste 130 and the housing 11, so as to more firmly fix the heat conductive paste 130 between the first wiring board 121 and the housing 11. It will be appreciated that the structural interference gap referred to in the present utility model means that the heat conductive paste 130 has structural interference with the housing 11 at the time of assembly so as to better block the gap between the first wiring board 121 and the housing 11 by crush deformation.

For example, the size of the structural interference gap referred to in the present utility model may be equal to 0.2mm. It can be appreciated that in other examples of the present utility model, the heat-conducting mud 130 and the housing 11 may not interfere with each other, and even a certain air gap may be reserved, so long as a majority of stray light can be blocked to prevent the stray light from entering the lens assembly 30, which is not described in detail in the present utility model.

According to the above-described embodiment of the present utility model, as shown in fig. 1, the housing 11 may include an upper case 111 provided with an opening, a lower case 112 connected to the upper case 111, and a light-transmitting member 113, the light-transmitting member 113 being disposed at the opening of the upper case 111 to form the light window 110. At this time, the heat conductive paste 130 is located between the first circuit board 121 and the upper case 111 to form the parasitic light isolation space 100. It is understood that the upper case 111 and the lower case 112 mentioned in the present utility model are respectively located above and below the light source assembly 20 and the lens assembly 30, so that the light window 110 is located in both the light emitting path of the light source assembly 20 and the light receiving path of the lens assembly 30; for simplicity, unless otherwise specified, the direction along the optical axis of the lens assembly 30 toward the external object is referred to herein as the upper direction, and the opposite direction is referred to herein as the lower direction.

Alternatively, the upper case 111 and the lower case 112 may be connected by a variety of means such as clamping, bonding or welding, so that the light source assembly 20, the lens assembly 30, the circuit board assembly 12 and the light blocking and heat conducting member 13 are assembled in the space between the upper case 111 and the lower case 112. It is understood that in other examples of the present utility model, the upper housing 111 may be integrally connected to the lower housing 112, or may be formed by splicing three or more housings, which will not be described in detail herein.

Alternatively, the light transmitting member 113 may be implemented as, but not limited to, a filter such as an infrared filter for transmitting light of a set wavelength so as to filter out stray light in the external environment, and only light of a specific wavelength in the external environment, for example, infrared light, is allowed to enter the lens assembly 30, thereby improving the imaging quality. It is understood that the infrared filter mentioned in the present utility model may be made of optical glass coating or colored glass, or may be made of special plastic such as PC or PMMA, so long as it can absorb or reflect visible light and only allow infrared light to pass through.

Alternatively, as shown in fig. 1, the upper case 111 has a first opening 1111 for corresponding to the light source assembly 20 and a second opening 1112 for corresponding to the lens assembly 30, the first opening 1111 and the second opening 1112 being spaced apart to leave a case partition 1113 between the first opening 1111 and the second opening 1112. In this way, the heat conductive paste 130 can be thermally coupled to the housing partition 1113 of the upper housing 111 to better isolate stray light and improve heat dissipation.

It is noted that, in a modified example of the present utility model, as shown in fig. 2, the first opening 1111 and the second opening 1112 on the upper housing 111 may also communicate with each other to form a large opening; that is, the upper case 111 does not have the case partition 1113, and the heat-conductive paste 130 directly contacts the transparent member 113 to isolate stray light. It can be understood that, in this modified example of the present utility model, although the portion of the heat conductive paste 130 directly contacting the light-transmitting member 113 cannot perform a heat dissipation function, the portion of the heat conductive paste 130 contacting the upper housing 111 still performs a heat dissipation function, so as to ensure that the camera module 1 still has a better heat dissipation performance.

It should be noted that the light-transmitting member 113 may be mounted on the upper housing 111 by bonding or welding, so long as the opening of the upper housing 111 can be plugged to form the light window 110, which is not described herein.

In addition, the light source assembly 20 of the present utility model may be embodied as, but is not limited to, an infrared light supplementing lamp for emitting infrared light to illuminate an external object such that the external object diffusely reflects the infrared light to be received by the lens assembly 30 for imaging. The lens assembly 30 of the present utility model may be embodied as, but is not limited to, a lens configured with an infrared sensing chip for receiving infrared light for imaging.

Optionally, the first circuit board 121 may be electrically connected to the second circuit board 122, and the first circuit board 121 is stacked above the second circuit board 122 so as to compensate for the height difference between the light source assembly 20 and the lens assembly 30, which also reduces the amount of the heat conductive paste 130 and saves costs.

The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The light proof heat radiation structure for install light source subassembly and camera lens subassembly, its characterized in that, the light proof heat radiation structure includes:

a housing having a light window for corresponding to the light source assembly and the lens assembly;

a circuit board assembly mounted within the housing, and including a first circuit board for electrically mounting the light source assembly and a second circuit board for electrically mounting the lens assembly; and

the light-isolating and heat-conducting piece can be connected with the first circuit board and the shell in a heat-conducting way, and a gap between the first circuit board and the shell is blocked, so that a parasitic light isolation space for accommodating the light source assembly is formed between the first circuit board and the shell.

2. The light-insulating and heat-dissipating structure of claim 1, wherein the light-insulating and heat-conducting member is a heat-conducting paste.

3. The light-insulating and heat-dissipating structure of claim 2, wherein the heat-conducting paste has a ring-like structure for being disposed around the light source assembly on the first wiring board; the heat conductive mud has one of a square ring section, a rectangular ring section, a circular ring section, an elliptical ring section, a trapezoidal ring section, and a triangular ring section.

4. The light-insulating and heat-dissipating structure according to claim 2, wherein the heat-conducting paste is a molded part and is fixedly mounted to the first wiring board or the housing.

5. The light-insulating and heat-dissipating structure according to claim 2, wherein the fixing manner between the heat-conducting mud and the first circuit board or the housing is one of glue bonding, thermal compression and welding.

6. The light-insulating and heat-dissipating structure of claim 2, wherein a structural interference gap exists between the thermally conductive paste and the housing.

7. The light-blocking and heat-dissipating structure according to any one of claims 1 to 6, wherein the housing includes an upper case provided with an opening, a lower case connected to the upper case, and a light-transmitting member provided at the opening of the upper case to form the light window; the light-insulating and heat-conducting member is arranged between the upper shell and the first circuit board to form the stray light isolation space.

8. The light-blocking and heat-dissipating structure of claim 7, wherein the upper housing has a first opening for corresponding to the light source assembly and a second opening for corresponding to the lens assembly, the first opening and the second opening being spaced apart to leave a housing partition between the first opening and the second opening in heat-transferable connection with the light-blocking and heat-conducting member.

9. The light-blocking and heat-dissipating structure according to any one of claims 1 to 6, wherein the first wiring board is electrically connectable to the second wiring board, and the first wiring board is stacked above the second wiring board.

10. The module of making a video recording, its characterized in that includes:

a light source assembly;

a lens assembly; and

the light-blocking heat-dissipating structure of any one of claims 1 to 9, the light source assembly and the lens assembly being correspondingly mounted to the light-blocking heat-dissipating structure.