Camera module and terminal

Abstract

Provided are a camera module and a terminal. The camera module comprises a camera lens, an image sensor, and a first heat conduction component, wherein the camera lens at least comprises a first lens and a second lens which are arranged from an object side to an image side; the image sensor is arranged on the image side of the camera lens and is used for converting a light signal projected by the camera lens into an electrical signal; and the first heat conduction component is used for conducting heat generated by the image sensor to the first lens. In the camera module provided in the present application, the heat generated by the image sensor is conducted to the first lens far away from the image sensor by means of the heat conduction component, so that the temperature of the first lens is kept above the dew point temperature, thereby preventing fogging of the camera lens.

Description

Camera module and terminal

[0001] This application claims priority to the Chinese patent application with application number 202311646701.8 filed on November 30, 2023, and application name “A camera module and terminal”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of camera technology, and in particular to a camera module and a terminal. Background Art

[0003] Conference terminals and conference cameras equipped with indoor, non-enclosed zoom cameras often experience lens fogging during use, resulting in blurry images. This fogging typically occurs on the inner surface of the lens and cannot be removed from the outside. This problem is more common in humid environments (such as the rainy season in southern China). Long-term use of lenses in humid environments generally results in two outcomes. The first is that the fog disappears after one hour of use, returning the image to normal. The second is that after prolonged use in a humid environment, environmental dirt adheres to the lens through repeated condensation and evaporation of water vapor, resulting in persistent stains.

[0004] Summary of the Invention

[0005] Embodiments of the present application provide a camera module and a terminal. The camera module transfers heat generated by an image sensor to a first lens through a heat-conducting component, so that the temperature of the first lens reaches above the dew point temperature, thereby preventing the lens from fogging.

[0006] In a first aspect, the present application provides a camera module, which includes a lens, an image sensor and a first heat-conducting component, wherein the lens includes at least a first lens and a second lens arranged from the object side to the image side; the image sensor is arranged on the image side of the lens, and is used to convert the light signal projected by the lens into an electrical signal; the first heat-conducting component is used to conduct the heat generated by the image sensor to the first lens.

[0007] The camera module provided in the present application transfers the heat generated by the image sensor to the first lens which is farther away from the image sensor through a heat-conducting component, so that the temperature of the first lens is kept above the dew point temperature, thereby avoiding the occurrence of lens fogging.

[0008] In a possible implementation, one end of the first heat conducting component contacts the image sensor, and the other end contacts the first lens, so as to conduct heat generated by the image sensor to the first lens.

[0009] The first heat-conducting component is disposed between the image sensor and the first lens and is in direct contact with the image sensor and the first lens, respectively, to enhance heat conduction between the image sensor and the first lens, rapidly transferring heat generated by the image sensor to the first lens, allowing the first lens to reach a temperature above the dew point before fogging, thereby preventing lens fogging.

[0010] In another possible implementation, the first heat conducting component is provided with a contact portion at one end close to the first lens, and the contact portion extends toward the first lens and contacts an outer wall surface of the first lens.

[0011] In another possible implementation, the lens further includes a lens barrel, the first lens and the second lens are disposed in the lens barrel; the first lens partially extends out of the lens barrel, and the contact portion contacts the portion of the first lens extending out of the lens barrel.

[0012] Exemplarily, the first lens is arranged at the open end of the lens barrel, and the end face size of the first lens close to the object side is larger than the opening size of the lens barrel, and overlaps the open end of the lens barrel; the end of the first heat-conducting component close to the first lens is bent toward the lens barrel to form a contact portion, and the contact portion contacts the first lens overlapped at the open end of the lens barrel. On the one hand, the first heat-conducting component serves to fix the first lens and the lens barrel, and on the other hand, the first heat-conducting component conducts the heat generated by the image sensor to the first lens.

[0013] In one example, the first heat-conducting component is in contact with the outer wall of the lens barrel, so that the first heat-conducting component conducts the heat generated by the image sensor to the entire lens barrel, thereby achieving uniform temperature distribution throughout the lens barrel and further preventing fogging inside the lens.

[0014] In another possible implementation, for a lens having a window, the first heat conducting component is further in contact with the window to conduct heat generated by the image sensor to the window, so that the temperature of the window reaches above the dew point temperature, thereby preventing the window from fogging.

[0015] In another possible implementation, the camera module provided in the present application also includes a lens driving board and a second heat-conducting component, one end of the second heat-conducting component contacts the lens driving board, and the other end contacts the first lens to conduct the heat generated by the lens driving board to the first lens.

[0016] The lens drive board in the camera module also generates heat during operation. The second heat-conducting component is used to transfer the heat generated by the lens drive board to the first lens, thereby transferring the heat from the two heat sources, the image sensor and the lens barrel drive board, to the first lens, further increasing the heating rate of the first lens and ensuring that the first lens reaches a temperature above the dew point before fogging, thereby preventing water vapor in the lens from condensing on the surface of the first lens and fogging.

[0017] In another possible implementation, the camera module provided by this application further includes a heat conductor covering the end of the image sensor facing away from the lens; the first heat conducting component contacts the heat conductor. The heat conductor increases the contact area with the image sensor, thereby improving heat conduction efficiency.

[0018] In another possible implementation, a heat sink is provided at one end of the heat conductor away from the lens, so that the heat generated by the image sensor is conducted to the heat sink through the heat conductor, and then the heat is dissipated to the outside through the heat sink, thereby reducing the temperature and heating rate of the image sensor.

[0019] In another possible implementation, the camera module provided in the present application also includes a housing, which has a accommodating cavity, and the lens and image sensor are both arranged in the accommodating cavity; the heat conductor contacts the inner wall of the housing to conduct the heat generated by the image sensor to the housing for heat dissipation.

[0020] In this possible implementation, the heat generated by the image sensor is conducted to the housing through a heat conductor, so that the heat is not concentrated inside the lens. Relying on the geometric structure of the housing with a large heat dissipation area, rapid heat dissipation is achieved and water vaporization in the lens is reduced.

[0021] The material of the housing can be selected based on actual needs. For example, when the image sensor used generates very high temperatures (e.g., 55°C-80°C), the housing can be made of a metal material with good thermal conductivity to facilitate heat dissipation. For example, an aluminum housing can be selected, with a thermal conductivity of 235, which can quickly dissipate heat into the air for rapid heat dissipation. For another example, when the image sensor used generates relatively low temperatures (e.g., 45°C-55°C), the housing can be made of a plastic thermally conductive material, meeting heat dissipation requirements while reducing housing costs.

[0022] In another possible implementation, the first heat-conducting component, the second heat-conducting component, and the heat conductor can be made of suitable heat-conducting materials according to actual conditions, such as the structure of the image sensor and lens and the required thermal conductivity. For example, the first heat-conducting component, the second heat-conducting component, and the heat conductor can include one or more of a silicone resin, a thermal insulating film, thermal grease, thermal grease, thermal adhesive, a thermal pad, and thermal gel. For example, the heat conductor can be a thermal pad, that is, by disposing a thermal pad between the image sensor and the housing, heat generated by the image sensor is transferred to the housing for dissipation; the first heat-conducting component and the second heat-conducting component can be heat-curing thermal insulating tape, which is disposed between the first lens and the image sensor to secure the first lens to the opening of the lens barrel while also transferring heat generated by the image sensor to the first lens, thereby raising the temperature of the first lens above the dew point to prevent fogging.

[0023] In a second aspect, the present application provides a terminal, comprising the camera module provided in the first aspect, to prevent the camera module of the terminal from fogging.

[0024] The terminal can be any terminal with a camera function, for example, terminals include but are not limited to mobile phones, tablet computers, wearable devices, laptops, ultra-mobile personal computers (UMPCs), handheld computers, personal digital assistants (PDAs), driving recorders, virtual reality equipment, surveillance cameras of security equipment, conference terminals and conference room cameras, etc.

[0025] When the terminal is a conference terminal, the conference terminal further includes a base, and the camera module provided in the first aspect is rotatably arranged on the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the multiple embodiments disclosed in this specification, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings described below are only the multiple embodiments disclosed in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0027] The following is a brief introduction to the drawings required for describing the embodiments or prior art.

[0028] Figure 1 shows the location of lens fogging in a camera module;

[0029] FIG2 shows an infrared analysis diagram of the heating condition of the entire lens barrel of a camera module during operation;

[0030] FIG3 is a schematic structural diagram of a camera module provided in an embodiment of the present application;

[0031] FIG4 shows another structural diagram of a camera module provided in an embodiment of the present application;

[0032] FIG5 shows another structural diagram of a camera module provided in an embodiment of the present application;

[0033] FIG6 shows another structural diagram of a camera module provided in an embodiment of the present application;

[0034] FIG7 shows a schematic structural diagram of a conference terminal. DETAILED DESCRIPTION

[0035] The term "and / or" as used herein describes an association relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The symbol " / " in this document indicates that the related objects are in an "or" relationship, for example, A / B means either A or B.

[0036] The terms "first," "second," and the like in the specification and claims herein are used to distinguish one object from another, rather than to describe a specific order of objects. For example, "first lens" and "second lens" are used to distinguish one lens from another, rather than to describe a specific order of lenses.

[0037] In the embodiments of this application, words such as "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of this application should not be interpreted as being preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0038] In the description of the embodiments of the present application, unless otherwise specified, “multiple” means two or more than two. For example, multiple lenses means two or more than two lenses, etc.; multiple elements means two or more than two elements, etc.

[0039] In the description of this application, the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting this application.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "install", "connect" and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a conflicting connection or an integrated connection. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] To facilitate understanding of the solutions of the embodiments of the present application, the technical terms involved in this document are first explained below.

[0042] The image sensor is the core component of the camera module, and its function is to convert light signals into electrical signals.

[0043] Various solutions are used in related technologies to solve the fogging problem of non-sealed lenses. For example, in related technology 1, a lens defogger device includes a shell, a fan, a motor, a battery and an air hood. The air hood is fixed to one end of the shell. The fan driven by electricity enables the defogger device to automatically dry the lens, eliminating the inconvenience caused by water mist.

[0044] However, this solution uses a fan to blow away the water mist, which cannot eliminate the water mist inside the lens.

[0045] Related technology 2 utilizes an ultra-thin transparent heated window, minimizing the amount of heat required to heat it to the defogging temperature. Research has found that selecting a transparent conductive layer with a sheet resistance of 5-200Ω and arranging the heated window and the transparent conductive layer in the aforementioned size ratios enables safe defogging in an ultra-fast manner.

[0046] However, the coating in this solution will affect the optical parameters of the lens, and thus affect the function of the camera.

[0047] The camera defogger device in related technology three is used to prevent fogging on the lens of the camera module on the vehicle. It mainly includes an electric heating protective cover, which includes a protective cover body, and a protective cover connector arranged on the outer wall of the protective cover body and integrated with the protective cover body. A accommodating cavity with an opening on one side for accommodating the camera module is constructed in the protective cover body. The camera light path area in the protective cover body is made of a transparent material with an electric heating wire. The electric heating wire is electrically connected to the connector. It also includes a trigger switch electrically connected to the connector, which can receive a defogger signal to control the start and stop heating function of the electric heating wire.

[0048] However, in this solution, heating the camera with the heating wire will cause the lens to produce temperature drift that is uncontrollable by the device itself, which may introduce new anomalies.

[0049] To address the above problems, an embodiment of the present application provides a camera module that transfers heat generated by the image sensor to the first lens through a heat-conducting component, so that the temperature of the first lens reaches above the dew point temperature, thereby preventing the lens from fogging.

[0050] The specific implementation of the camera module provided in the embodiments of the present application is described in detail below with reference to the accompanying drawings.

[0051] Figure 1 shows the location of lens fogging in a camera module. As shown in Figure 1, fogging of a non-sealed camera module often occurs on the inner surface of G1lens (i.e., the first lens).

[0052] It can be understood that a non-sealed camera module means that the lens cavity is non-sealed, and moist air from the outside will enter the lens cavity. The camera modules of common terminals in life are mostly non-sealed camera modules. For example, the camera modules of mobile phones, the camera modules of conference terminals, the surveillance cameras of security equipment, etc. are all non-sealed camera modules. Sealed camera modules are rare due to their high cost.

[0053] Figure 2 shows an infrared analysis of the overall heating of the lens barrel during operation of a camera module. As shown in Figure 2, the infrared thermal analysis of the overall heating of the lens barrel indicates that the image sensor (because the heat source of the image sensor is the sensor board, heat generated by the image sensor is also referred to as sensor board heat) is the largest source of heat in the camera. The temperature of the sensor board, located at the rear end of the lens barrel, was 37.44°C, with a maximum temperature of 50.3°C. The sensor board heats up rapidly. In humid environments, the high temperature of the sensor board accelerates the evaporation of surrounding water droplets, increasing the relative humidity of the air inside the lens barrel. At normal temperature and pressure, higher relative humidity also increases the dew point. When the camera is first turned on, the sensor board heats up rapidly, causing the dew point to rise rapidly. During this period, the entire lens has not yet reached temperature equilibrium, and the G1 lens, located at the far end of the sensor board, heats up the slowest. When the dew point rises above the temperature of the G1 lens, condensation occurs. A similar example is that glasses are more likely to fog up when eating hot pot.

[0054] As can be seen from the above description, the fundamental reason for the fogging of the lens is the uneven temperature in the camera module. The temperature of the sensor board is too high, which causes the water droplets in the humid environment to vaporize, thereby increasing the humidity in the lens. The increase in humidity causes the dew point temperature to increase, while the temperature of the G1lens, which is farther away from the sensor board, is lower, lower than the dew point temperature, causing the water vapor to condense on the inner surface of the G1lens to produce small water droplets, which in turn causes the lens to fog. Therefore, the embodiment of the present application improves the camera module to achieve a balanced temperature distribution as much as possible in the camera module, and completely solves the problem of lens fogging from the source, avoiding the influence of lens fogging on the shooting effect during the operation of the camera module, and the dirty lens caused by fogging.

[0055] FIG3 is a schematic structural diagram of a camera module provided in an embodiment of the present application.

[0056] As shown in Figure 3, the camera module 300 provided in an embodiment of the present application includes a lens, a sensor board 303 and a first heat-conducting component 304, wherein the lens includes at least multiple lenses, for example, the multiple lenses include G1lens301 (i.e., the first lens) and G2lens302 (i.e., the second lens) arranged from the object side to the image side; the sensor board 303 is arranged on the image side of the lens, and is used to convert the light signal projected by the lens into an electrical signal; the first heat-conducting component 304 is used to conduct the heat generated by the sensor board 303 to G1lens301.

[0057] The first heat-conducting component 304 has good thermal conductivity and contacts the sensor board 303 and G1lens 301, respectively, to conduct heat generated by the sensor board 303 to the G1lens 301. For example, one end of the first heat-conducting component 304 contacts the sensor board 303, and the other end contacts the G1lens 301. This enhances the heat conduction path between the sensor board 303 and the G1lens 301, and conducts heat generated by the sensor board 303 to the G1lens 301. This ensures that the temperature of the G1lens 301, which is farther away from the sensor board 303, is above the dew point temperature, thereby preventing lens fogging.

[0058] In order to ensure contact between the first heat conducting component 304 and the G1lens 301 , a contact portion is provided at one end of the first heat conducting component 304 close to the G1lens 301 , and the contact portion 3041 extends toward the G1lens 301 and contacts the outer wall surface of the G1lens 301 .

[0059] 3 , the lens further includes a lens barrel 305 , in which the G1lens 301 and the G2lens 302 are disposed. A portion of the G1lens 301 extends out of the lens barrel 305 , and the contact portion 3041 contacts the portion of the G1lens 301 extending out of the lens barrel 305 .

[0060] Exemplarily, G1lens301 is arranged at the open end of the lens barrel 305, and the end face size of the end of G1lens301 close to the object side is larger than the opening size of the lens barrel 305, and is overlapped with the open end of the lens barrel 305; the end of the first heat-conducting component 304 close to G1lens301 is bent toward the lens barrel 305 to form a contact portion, and the contact portion 3041 is in contact with G1lens301 overlapped with the open end of the lens barrel 305. On the one hand, the first heat-conducting component 304 serves to fix G1lens301 to the lens barrel 305. On the other hand, the first heat-conducting component 304 uses its own good thermal conductivity to conduct the heat generated by the sensor board 303 to G1lens301, thereby reducing the temperature difference between the sensor board 303 and G1lens301.

[0061] As can be seen from Figure 3, in order not to affect the optical function of the lens, the length of the contact portion 3041 of the first heat-conducting component 304 extending toward the lens barrel 305 is limited, and the outer edge of the contact portion 3041 does not exceed the inner wall surface of the lens barrel 305 after contacting the G1lens 301.

[0062] In order to further make the temperature distribution inside the lens barrel 305 uniform, the first heat-conducting component 304 is in contact with the outer wall of the lens barrel 305. In this way, the first heat-conducting component 304 conducts the heat generated by the sensor board 303 to the entire lens barrel 305, thereby achieving uniform temperature distribution throughout the lens barrel 305 and further preventing fogging inside the lens.

[0063] In one example, the first heat-conducting component 304 can be a strip-shaped heat-conducting strip, the two ends of which are in contact with the sensor board 303 and the G1lens 301 respectively, and the remaining part is tightly fitted with the outer wall surface of the lens barrel 305 to conduct the heat generated by the sensor board 303 to the entire lens barrel 305, thereby achieving balanced temperature distribution of the lens barrel 305.

[0064] Optionally, the first heat-conducting component 304 includes a plurality of heat-conducting bars, which are evenly distributed along the circumferential outer wall of the lens barrel 305 to evenly conduct the heat generated by the sensor board 303 to the lens barrel 305 and the G1lens 301 .

[0065] In another example, the first heat-conducting component 304 can also be a sheet-shaped heat-conducting sheet, which covers the outer wall surface of the lens barrel 305 and contacts the sensor board 303 and G1lens 301 at both ends respectively. The good thermal conductivity of the heat-conducting sheet is used to conduct the heat generated by the sensor board 303 to the entire lens barrel 305 and G1lens 301, thereby balancing the temperature distribution of the lens barrel 305.

[0066] Returning to Figure 3, the camera module 300 provided in the embodiment of the present application also includes a lens driving board 306. When the camera module 300 is working, the lens barrel driving board 306 will also generate heat. In order to further accelerate the heating speed of G1lens301 so that the temperature of G1lens301 can be quickly increased to above the dew point temperature, a second heat-conducting component 307 is arranged between the lens driving board 306 and G1lens301. The thermal conductivity of the second heat-conducting component 307 is used to conduct the heat generated by the lens driving board 306 to G1lens301.

[0067] Illustratively, one end of the second heat-conducting component 307 contacts the lens driving board 306, and the other end contacts G1lens301, thereby enhancing the heat conduction path between the lens driving board 306 and G1lens301, and conducting the heat generated by the lens driving board 306 to G1lens301, thereby accelerating the temperature increase of G1lens301.

[0068] Similar to the first heat-conducting component 304 , the second heat-conducting component 307 is also provided with a contact portion to facilitate contact with the G1lens 301 . For the specific structure of the contact portion, please refer to the description of the contact portion 3041 of the first heat-conducting component 304 , which will not be repeated here for the sake of brevity.

[0069] In order to further make the temperature distribution inside the lens barrel 305 uniform, the second heat-conducting component 307 is in contact with the outer wall of the lens barrel 305. In this way, the second heat-conducting component 307 conducts the heat generated by the lens driving plate 306 to the entire lens barrel 305, thereby achieving uniform temperature distribution throughout the lens barrel 305 and further preventing fogging inside the lens.

[0070] Optionally, the first heat-conducting component 304 can be a strip-shaped heat-conducting strip, the two ends of which are in contact with the lens driving board 306 and G1lens301 respectively, and the remaining part is tightly fitted with the outer wall surface of the lens barrel 305 to conduct the heat generated by the lens driving board 306 to the entire lens barrel 305, thereby achieving balanced temperature distribution of the lens barrel 305.

[0071] It can be understood that the lens driving board 306 refers to a circuit board that can realize one or more functions of transmitting the image signal generated by the sensor board 303 to the processing unit (such as GPU) of the terminal, transmitting the driving signal of the lens motor when the camera module zooms, and supplying power to the sensor board and the lens motor.

[0072] As shown in Figure 3, the camera module 300 provided in the present application also includes a shell 308, which defines a receiving cavity. The lens, sensor board 303 and lens driving board 306 are all arranged in the receiving cavity. There is a gap between the lens barrel 305 and the inner wall of the shell 308. The thickness of the first heat-conducting component 304 and the second heat-conducting component 307 is less than or equal to the gap between the lens barrel 305 and the inner wall of the shell 308, so that the first heat-conducting component 304 and the second heat-conducting component 307 have a setting space.

[0073] Figure 4 shows another schematic structural diagram of a camera module provided in an embodiment of the present application. As shown in Figure 4, the camera module 300 provided in the present application further includes a heat conductor 309, which covers the end of the sensor board 303 facing away from the lens. The first heat conducting component 304 contacts the heat conductor 309, which increases the contact area with the sensor board 303 through the heat conductor 309, thereby improving heat conduction efficiency.

[0074] Illustratively, the end face of the first heat-conducting component 304 close to the sensor board 303 contacts the heat conductor 309 covering the surface of the sensor board 303, and the side face contacts the end face of the sensor board 303, thereby increasing the effective thermal contact area between the first heat-conducting component 304 and the sensor board 303, and increasing the efficiency of the first heat-conducting component 304 in conducting the heat generated by the sensor board 303 to the G1lens 301.

[0075] It should be explained that Figure 4 is only a possible implementation example of the camera module and does not constitute a limitation on the embodiments of the present application. For example, the heat conductor 309 in Figure 4 can also extend to contact the inner wall surface of the outer shell 308 to conduct the heat generated by the sensor board 303 to the outer shell for heat dissipation, thereby reducing the temperature rise rate of the sensor board 303.

[0076] Figure 5 shows another schematic structural diagram of a camera module provided in an embodiment of the present application. As shown in Figure 5, the camera module 300 provided in the present application further includes a heat sink 310, which is disposed at the end of the heat conductor 309 facing away from the lens. Heat generated by the sensor board 303 is conducted to the heat sink 310 via the heat conductor, and then dissipated to the outside world via the heat sink, thereby reducing the temperature and heating rate of the sensor board 303.

[0077] Figure 6 shows another schematic structural diagram of the camera module provided by an embodiment of the present application. In the camera module shown in Figure 6, the heat conductor 309 contacts the inner wall of the housing 308 to conduct the heat generated by the sensor board 303 to the housing 308 for heat dissipation.

[0078] The camera module structure shown in Figure 6, on the one hand, uses a heat conductor in contact with the outer casing to conduct the heat generated by the sensor board 303 to the outside for heat dissipation, thereby extending the time it takes for the sensor board 303 to rise from room temperature to the maximum temperature; on the other hand, the heat-conducting components (such as the first heat-conducting component and the second heat-conducting component) conduct the heat generated by the sensor board 303 and the lens driving board 306 to the G1lens 301, ensuring that the G1lens 301 can reach a dew point temperature above before fogging.

[0079] The material of the housing can be selected according to actual needs. For example, when the heat generated by the sensor board 303 is very high (e.g., 55°C-80°C), the housing can be made of a metal material with good thermal conductivity to facilitate heat dissipation. For example, an aluminum housing can be selected, with a thermal conductivity of 235, which can quickly dissipate heat into the air and achieve rapid heat dissipation. For another example, when the heat generated by the sensor board 303 is not too high (e.g., 45°C-55°C), the housing can be made of a plastic thermal conductive material, which can meet the heat dissipation requirements while reducing the cost of the housing.

[0080] The camera module provided in the embodiment of the present application utilizes the principle of heat conduction to prevent fogging inside the lens. According to Fourier's law: Here, Q represents the amount of heat conducted; k represents the thermal conductivity coefficient; ΔT represents the temperature change; A represents the cross-sectional area; and L represents the material thickness. The heat conductor conducts heat generated by the sensor board to the camera module housing, preventing heat from concentrating within the lens. Thanks to the housing's large heat dissipation area, ΔT can be reduced for the same amount of heat generated by the sensor board. This reduces the sensor board's temperature and prolongs the warm-up time, minimizing water vaporization in the lens environment. The thermal conductive component primarily addresses the issue of the sensor board's long distance from the G1lens, resulting in inefficient heating through convection and radiation. The thermal conductive component transfers heat from the sensor board to the G1lens through the thermally conductive material, while also directing heat from the lens driver board to the G1lens, rapidly raising the G1lens temperature above the dew point.

[0081] In this way, by setting up a heat conductor and heat-conducting components in the lens module, the temperature of the G1lens at the farthest end of the sensor board is always kept above the dew point temperature. At this time, the lens in the lens is higher than the dew point, and the lens does not produce condensation droplets, thereby preventing the lens from fogging.

[0082] The amount of heat generated by the sensor boards in different camera modules during operation may be different. The camera modules of the structures shown in Figures 3 to 6 provided in the embodiments of the present application may be selected according to the amount of heat generated by the sensor boards. For example, for sensor boards with very high operating temperatures (for example, greater than 55°C), for example, for sensor boards with operating temperatures of 55°C-80°C, the structure shown in Figure 6 can be adopted, and the structure shown in Figure 6 has the best performance in preventing fogging. For sensor boards with relatively high operating temperatures (for example, 45°C-55°C), the structure shown in Figure 5 can be adopted, and the structure shown in Figure 5 has medium performance in preventing fogging. For sensor boards with medium operating temperatures (for example, 40°C-45°C), the structure shown in Figure 4 can be adopted. For sensor boards with relatively low operating temperatures (for example, less than 40°C), the structure shown in Figure 3 can be adopted to reduce the cost of the camera module while meeting the defogging requirements.

[0083] It should be explained that the first heat-conducting component, the second heat-conducting component and the heat conductor can be selected from suitable heat-conducting materials according to actual conditions, for example, according to the structure of the sensor board and the lens and the required thermal conductivity. For example, the first heat-conducting component, the second heat-conducting component and the heat conductor can include one or more of a silicone resin body, a heat-conducting insulating film, a heat-conducting silicone grease, a heat-conducting grease, a heat-conducting adhesive, a heat-conducting pad and a heat-conducting gel. For example, the heat conductor can be a heat-conducting pad, that is, by arranging a heat-conducting pad between the sensor board and the housing, the heat generated by the sensor board is transferred to the housing for heat dissipation; the first heat-conducting component and the second heat-conducting component can be heat-curing heat-conducting insulating tape, by arranging the heat-curing heat-conducting insulating tape between the first lens and the sensor board, on the one hand, the G1lens is fixed to the opening of the lens barrel, and on the other hand, the heat generated by the sensor board is transferred to the G1lens, so that the temperature of the G1lens is raised to above the dew point temperature to avoid lens fogging.

[0084] Some camera modules have windows. For lenses with windows, the first heat-conducting component in the camera module provided in the embodiment of the present application is also in contact with the window to conduct the heat generated by the sensor board to the window, so that the temperature of the window reaches above the dew point temperature, thereby preventing the window from fogging.

[0085] It should be pointed out that the camera module shown in Figures 4-6 provided in the embodiment of the present application is only an example and does not constitute a limitation to the embodiment of the present application. It may include more or fewer components. For example, the lens of the camera module 300 may also include more lenses, such as G3lens, G4lens, etc.

[0086] In the embodiment of the present application, the lens of the camera module can be a zoom lens or a fixed-focus lens. For example, when the lens of the camera module is a zoom lens, G1lens, G2lens, G3lens, G4lens, G5lens, G6lens, G7lens, G8lens and G9lens are arranged in sequence from the object side to the image side in the lens, wherein G1lens, G2lens and G3lens constitute the first lens group, G4lens, G5lens and G6lens constitute the second lens group, G7lens, G8lens and G9lens constitute the third lens group, and the distance between each lens group is adjusted to achieve adjustment of different focal lengths.

[0087] The camera module provided in the embodiment of the present application does not make any specific restrictions on the lenses in the lens (such as G1lens and G2lens). The surface shape of the lens can be spherical or aspherical, and the material of the lens can be optical glass or optical plastic, etc.

[0088] The camera module provided in the embodiments of the present application can be applied to any terminal with a camera function, such as terminals including but not limited to mobile phones, tablet computers, wearable devices, laptops, ultra-mobile personal computers (UMPCs), handheld computers, personal digital assistants (PDAs), driving recorders, virtual reality equipment, surveillance cameras of security equipment, conference terminals and conference room cameras, etc., to prevent the camera module of the terminal from fogging and affecting the camera effect.

[0089] For example, Figure 7 shows a schematic diagram of the structure of a conference terminal. As shown in Figure 7, the conference terminal includes a camera module 300 and a base 400 provided in an embodiment of the present application. The camera module 300 is rotatably mounted on the base 400. When the viewing angle of the camera module 300 needs to be adjusted, a drive device (not shown in the figure, such as a drive motor) at the base 400 terminal drives the camera module to rotate to adjust the viewing angle. Even in a humid environment, the camera module of the conference terminal will not fog up when operating, thereby ensuring the best possible camera effect.

[0090] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A camera module, characterized in that: include: A lens, comprising at least a first lens and a second lens arranged from an object side to an image side; An image sensor, disposed on the image side of the lens, for converting the light signal projected by the lens into an electrical signal; The first heat-conducting component is used to conduct the heat generated by the image sensor to the first lens.

2. The camera module according to claim 1, characterized in that: One end of the first heat conducting component contacts the image sensor, and the other end contacts the first lens, so as to conduct heat generated by the image sensor to the first lens.

3. The camera module according to claim 1 or 2, characterized in that: The first heat conducting component is provided with a contact portion at one end close to the first lens, and the contact portion extends in a direction close to the first lens and contacts with an outer wall surface of the first lens.

4. The camera module according to claim 3, characterized in that: The lens further comprises a lens barrel, wherein the first lens and the second lens are arranged in the lens barrel; The first lens portion extends out of the lens barrel, and the contact portion contacts a portion of the first lens extending out of the lens barrel.

5. The camera module according to claim 4, characterized in that: The first heat conducting component is in contact with the outer wall surface of the lens barrel.

6. The camera module according to any one of claims 1 to 5, characterized in that: The lens also includes a window; The first heat conducting component contacts the window to conduct heat generated by the image sensor to the window.

7. The camera module according to any one of claims 1 to 6, characterized in that: Also includes: Lens driver board; A second heat-conducting component has one end in contact with the lens driving board and the other end in contact with the first lens, so as to conduct heat generated by the lens driving board to the first lens.

8. The camera module according to any one of claims 1 to 7, characterized in that: Also includes: A heat conductor, covering an end of the image sensor away from the lens; The first heat conducting component is in contact with the heat conductor.

9. The camera module according to claim 8, characterized in that: A heat sink is arranged at one end of the heat conductor away from the lens.

10. The camera module according to claim 8, characterized in that: Also includes: The housing has a housing cavity, and the lens and the image sensor are both arranged in the housing cavity; The heat conductor contacts the inner wall of the housing to conduct the heat generated by the image sensor to the housing for heat dissipation.

11. The camera module according to claim 10, characterized in that: The heat generated by the image sensor is greater than or equal to 55 degrees, and the material of the housing is metal; Alternatively, the heat generated by the image sensor is greater than or equal to 45 degrees and less than 55 degrees, and the shell is made of plastic.

12. The camera module according to any one of claims 1 to 11, characterized in that: The first heat-conducting component includes one or more of a silicone resin body, a heat-conducting insulating film, a heat-conducting silicone grease, a heat-conducting grease, a heat-conducting adhesive, a heat-conducting pad and a heat-conducting gel.

13. A terminal, characterized in that: Comprising a camera module as described in any one of claims 1-12.

14. The terminal according to claim 13, characterized in that: The terminal is a conference terminal, and the conference terminal also includes a base, and the camera module is rotatably arranged on the base.

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