Dust prevention method for camera module and camera module

Abstract

The present invention provides a dustproof method for a camera module and a camera module, wherein the camera module includes a support frame, an image sensor chip, a lens barrel and a retractable lens module, wherein the dustproof method includes: providing a plurality of one-way valves with filtering functions, and when the lens module is retracted, at least 70% of the air enters the cavity formed by the lens barrel, the support frame and the image sensor chip through the one-way valves through opening and closing, and at least 70% of the air flows out of the cavity through the gaps between the various components of the camera module, thereby preventing dust particles from entering the cavity and contaminating the image sensor chip. The present invention can effectively prevent dust particles from entering the internal cavity of the camera module and contaminating the image sensor chip, thereby ensuring imaging quality and improving the performance of the camera module.

Description

Technical Field

[0001] The invention relates to a dust prevention method for a camera module and the camera module. Background Art

[0002] A traditional camera module usually includes a supporting frame, an image sensor chip, a lens barrel and a retractable lens module. When the lens module is retracted, due to the imbalance between the external air pressure and the internal air pressure of the camera module, the external air will enter and exit the cavity formed by the lens barrel, the supporting frame and the image sensor chip through the gaps between the various components of the camera module, thereby causing dust particles in the external air to enter the internal cavity of the camera module and contaminate the image sensor chip, thereby affecting the imaging quality and camera module performance. Summary of the invention

[0003] The object of the present invention is to provide a dust prevention method for a camera module and a camera module, so as to prevent dust particles from entering the internal cavity of the camera module and contaminating the image sensor chip, thereby ensuring the imaging quality and improving the performance of the camera module.

[0004] Based on the above considerations, one aspect of the present invention provides a dust prevention method for a camera module, wherein the camera module includes a supporting frame, an image sensor chip, a lens barrel and a retractable lens module, and the dust prevention method includes: providing a plurality of one-way valves with a filtering function, and when the lens module is retracted or extended, at least 70% of the air enters a cavity formed by the lens barrel, the supporting frame and the image sensor chip through the opening and closing of the one-way valves, and at least 70% of the air flows out of the cavity through the gaps between the various components of the camera module, thereby preventing dust particles from entering the cavity and contaminating the image sensor chip.

[0005] Preferably, when the lens module is extended outward, the external air pressure of the camera module is greater than the air pressure of the internal cavity, the one-way valve opens toward the inside of the cavity, and at least 70% of the air flows into the cavity after being filtered.

[0006] Preferably, when the lens module is retracted inward, the external air pressure of the camera module is lower than the air pressure of the internal cavity, and at least 70% of the air in the cavity flows out through the gaps between the components of the camera module.

[0007] Preferably, the one-way valve is arranged on a side wall of the supporting frame.

[0008] Preferably, the one-way valves are symmetrically distributed around the outer side of the image sensor chip.

[0009] Preferably, the one-way valve is covered with a filter membrane or connected to a filter.

[0010] Another aspect of the present invention provides a camera module, comprising: a support frame; an image sensor chip and a lens barrel mounted on the support frame; a retractable lens module located in the lens barrel; and a plurality of one-way valves with filtering functions, wherein when the lens module is retracted or extended, at least 70% of the air enters a cavity formed by the lens barrel, the support frame and the image sensor chip through the opening and closing of the one-way valves, and at least 70% of the air flows out of the cavity through the gaps between the various components of the camera module, thereby preventing dust particles from entering the cavity and contaminating the image sensor chip.

[0011] Preferably, the one-way valve is arranged on a side wall of the supporting frame.

[0012] Preferably, the one-way valves are symmetrically distributed around the outer side of the image sensor chip.

[0013] Preferably, the one-way valve is covered with a filter membrane or connected to a filter.

[0014] The dust prevention method and camera module of the present invention provide a plurality of one-way valves with filtering functions, so that when the lens module is extended or retracted, at least 70% of the air enters the internal cavity of the camera module through the one-way valves after being filtered by opening and closing the one-way valves, and at least 70% of the air flows out of the internal cavity of the camera module through the gaps between the various components of the camera module, thereby effectively preventing dust particles from entering the internal cavity of the camera module and contaminating the image sensor chip, thereby ensuring the imaging quality and improving the performance of the camera module. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0016] Figure 1 It is a cross-sectional schematic diagram of the camera module of the present invention. DETAILED DESCRIPTION

[0017] In order to solve the problems in the above-mentioned prior art, the present invention provides a dust prevention method for a camera module and a camera module, and provides a plurality of one-way valves with filtering functions, so that when the lens module is extended or retracted, at least 70% of the air enters the internal cavity of the camera module after being filtered through the one-way valve through the opening and closing of the one-way valve, and at least 70% of the air flows out of the internal cavity of the camera module through the gaps between the various components of the camera module, thereby effectively preventing dust particles from entering the internal cavity of the camera module and contaminating the image sensor chip, thereby ensuring imaging quality and improving the performance of the camera module.

[0018] In the following specific description of the preferred embodiments, reference will be made to the attached drawings which constitute a part of the present invention. The attached drawings show by way of example specific embodiments that can implement the present invention. The illustrative embodiments are not intended to be exhaustive of all embodiments according to the present invention. It will be appreciated that other embodiments may be utilized, and structural or logical modifications may also be made without departing from the scope of the present invention. Therefore, the following specific description is not restrictive, and the scope of the present invention is limited by the appended claims.

[0019] Figure 1 The schematic diagram of the structure of the camera module of the present invention is shown, and the camera module comprises: a support frame 1; an image sensor chip 2 and a lens barrel 3 mounted on the support frame 1; and a retractable lens module 4 located in the lens barrel 3. The camera module also comprises a plurality of one-way valves 5 with filtering functions, and when the lens module 4 is retracted and extended, at least 70% of the air enters the cavity 6 formed by the lens barrel 3, the support frame 1 and the image sensor chip 2 through the one-way valves 5 through opening and closing, and at least 70% of the air flows out of the cavity 6 through the gaps between the components of the camera module. Specifically, when the lens module 4 extends outward, the external air pressure of the camera module is greater than the air pressure of the internal cavity 6, the one-way valve 5 opens toward the inside of the cavity 6, and at least 70% of the air flows into the cavity 6 after filtration; when the lens module 4 retracts inward, the external air pressure of the camera module is less than the air pressure of the internal cavity 6, and at least 70% of the air in the cavity 6 flows out through the gaps between the various components of the camera module, thereby effectively preventing dust particles from entering the internal cavity 6 of the camera module and contaminating the image sensor chip 2.

[0020] Another aspect of the present invention provides a dust prevention method for a camera module, the camera module comprising a supporting frame 1, an image sensor chip 2, a lens barrel 3 and a retractable lens module 4, the dust prevention method comprising: providing a plurality of one-way valves 5 with a filtering function, when the lens module 4 is retracted or extended, at least 70% of the air enters a cavity 6 formed by the lens barrel 3, the supporting frame 1 and the image sensor chip 2 through the opening and closing of the one-way valves 5, and at least 70% of the air flows out of the cavity 6 through the gaps between the various components of the camera module. Specifically, when the lens module 4 extends outward, the external air pressure of the camera module is greater than the air pressure of the internal cavity 6, the one-way valve 5 opens toward the inside of the cavity 6, and at least 70% of the air flows into the cavity 6 after filtration; when the lens module 4 retracts inward, the external air pressure of the camera module is less than the air pressure of the internal cavity 6, and at least 70% of the air in the cavity 6 flows out through the gaps between the various components of the module, thereby effectively preventing dust particles from entering the internal cavity 6 of the camera module and contaminating the image sensor chip 2.

[0021] Preferably, the one-way valve 5 is arranged on a side wall of the supporting frame 1 .

[0022] Preferably, the one-way valves 5 are symmetrically distributed around the outer side of the image sensor chip 2 .

[0023] Preferably, the one-way valve 5 is covered with a filter membrane or connected to a filter (not shown).

[0024] The dust prevention method and camera module of the present invention provide a plurality of one-way valves with filtering functions, so that when the lens module is extended or retracted, at least 70% of the air enters the internal cavity of the camera module through the one-way valves after being filtered by opening and closing the one-way valves, and at least 70% of the air flows out of the internal cavity of the camera module through the gaps between the various components of the module, thereby effectively preventing dust particles from entering the internal cavity of the camera module and contaminating the image sensor chip, thereby ensuring the imaging quality and improving the performance of the camera module.

[0025] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, in any case, the embodiments should be considered exemplary and non-restrictive. Furthermore, it is apparent that the term "comprising" does not exclude other elements and steps, and the wording "a" does not exclude the plural. Multiple elements stated in a device claim may also be implemented by one element. The words first, second, etc. are used to indicate names and do not indicate any particular order.

Claims

1. A dust prevention method for a camera module, the camera module comprising a support frame, an image sensor chip mounted on the support frame, a lens barrel, and a retractable lens module located in the lens barrel, characterized in that: The dust prevention method comprises: The lens barrel is located above the support frame, the image sensor chip is located below the support frame, and the lens barrel, the support frame and the image sensor chip form a cavity; A plurality of one-way valves with filtering functions are provided, wherein the one-way valves are arranged on the side walls of the support frame. When the lens module is extended or retracted, at least 70% of the air enters the cavity through the one-way valves by opening and closing the one-way valves, and at least 70% of the air flows out of the cavity through the gaps between the components of the camera module, thereby preventing dust particles from entering the cavity and contaminating the image sensor chip.

2. The dust prevention method for a camera module according to claim 1, characterized in that: When the lens module is extended outward, the external air pressure of the camera module is greater than the air pressure of the internal cavity, the one-way valve opens toward the inside of the cavity, and at least 70% of the air flows into the cavity after being filtered.

3. The dust prevention method for a camera module as claimed in claim 1, characterized in that: When the lens module is retracted inward, the external air pressure of the camera module is lower than the air pressure of the internal cavity, and at least 70% of the air in the cavity flows out through the gaps between the various components of the camera module.

4. The dust prevention method for a camera module according to claim 1, characterized in that: The one-way valves are symmetrically distributed around the outer side of the image sensor chip.

5. The dust prevention method for a camera module as claimed in claim 1, characterized in that: The one-way valve is covered with a filter membrane or connected with a filter.

6. A camera module, characterized in that: include: Support frame; An image sensor chip and a lens barrel mounted on the support frame; A retractable lens module located in the lens barrel; The lens barrel is located above the support frame, the image sensor chip is located below the support frame, and the lens barrel, the support frame and the image sensor chip form a cavity; A plurality of one-way valves with filtering functions are arranged on the side walls of the support frame. When the lens module is extended or retracted, at least 70% of the air enters the cavity through the one-way valves by opening and closing the one-way valves, and at least 70% of the air flows out of the cavity through the gaps between the components of the camera module, thereby preventing dust particles from entering the cavity and contaminating the image sensor chip.

7. The camera module according to claim 6, characterized in that: The one-way valves are symmetrically distributed around the outer side of the image sensor chip.

8. The camera module according to claim 6, wherein: The one-way valve is covered with a filter membrane or connected with a filter.

Images