Camera module with protective air ventilation channel
View Patent ↗A camera module with a vent in a housing thereof to allow for fluid communication between an interior of the camera module and an exterior of the camera module. A micro-porous membrane filter having a pore size smaller than 10 um is employed to cover the vent so as to reduce the flow of contaminants into the camera module.
1. A camera module, comprising:
a substrate;
an image sensor attached to the substrate;
a housing attached to the substrate, the housing having a first opening into which a lens is received, and a second opening to provide fluid communication between the interior of the camera module and the exterior of the camera module; and
a filter covering the second opening to allow air to pass therethrough while reducing the amount of contaminants passing therethrough.
2. A camera module as defined in claim 1 , wherein the filter includes a micro-porous membrane.
3. A camera module as defined in claim 2 , wherein the filter has a pore size smaller than 10 um.
4. A camera module as defined in claim 1 , wherein the filter has a pore size smaller than 10 um.
5. A camera module as defined in claim 1 , wherein the second opening allows the air pressure in the interior of the camera module to be the same as the air pressure in the exterior of the camera module.
6. A camera module as defined in claim 1 , wherein the filter is attached to the housing via an adhesive.
7. A camera module as defined in claim 6 , wherein the adhesive includes glue.
8. A camera module as defined in claim 6 , wherein the adhesive includes tape.
9. A camera module as defined in claim 1 , wherein the filter is attached to the housing via an annular channel in the housing that receives the filter.
10. A camera module as defined in claim 9 , wherein the housing further includes a recess that receives the filter.
11. A camera module as defined in claim 1 , wherein the housing further includes a recess that receives the filter.
12. A camera module as defined in claim 1 , wherein the camera module further includes an IR filter that reduces the amount of IR energy reaching the image sensor.
13. A camera module as defined in claim 1 , wherein the lens is fixably received within the housing.
14. A camera module as defined in claim 1 , wherein the lens is movably received within the housing.
15. A camera module as defined in claim 1 , wherein, other than the second opening, the camera module is sealed to minimize any fluid communication between the interior of the camera module and the exterior of the camera module.
16. A camera module, comprising:
a substrate;
an image sensor attached to the substrate;
a housing attached to the substrate, the housing having a first opening into which a lens is received, and a second opening to provide fluid communication between the interior of the camera module and the exterior of the camera module, wherein the second opening allows the air pressure in the interior of the camera module to be the same as the air pressure in the exterior of the camera module; and
a filter covering the second opening to allow air to pass therethrough while reducing the amount of contaminants passing therethrough, wherein the filter includes a micro-porous membrane;
wherein the housing further includes a recess that receives the filter.
17. A camera module as defined in claim 16 , wherein the filter has a pore size smaller than 10 um.
18. A camera module as defined in claim 16 , wherein the camera module further includes an IR filter that reduces the amount of IR energy reaching the image sensor.
19. A camera module as defined in claim 16 , wherein the lens is fixably received within the housing.
20. A camera module as defined in claim 16 , wherein the lens is movably received within the housing.
21. A camera module as defined in claim 16 , wherein, other than the second opening, the camera module is sealed to minimize any fluid communication between the interior of the camera module and the exterior of the camera module.