Camera module with dust trap
View Patent ↗A camera module for capturing an image. The camera module including an image sensor including a die mounted on a substrate, a housing coupled with the substrate to substantially enclose the die, and a dust trap substance adhered to the housing configured to capture and maintain at least one dust particle to decrease movement of dust particles within the housing, which decreases a number of blemishes in the captured image.
1. A camera module for capturing an image, the camera module comprising:
a barrel;
a lens;
an image sensor including a die mounted on a substrate;
a housing for substantially enclosing the die and defining a plurality of individual cavities;
a plurality of individual fasteners extending through the individual cavities, respectively, to attach the housing to the substrate via the plurality of cavities, each cavity and a respective fastener defining a respective mating region therebetween; and
a dust trap substance adhered to at least one of the respective mating regions, and configured to capture and maintain at least one dust particle to decrease the movement of dust particles within the housing, which decreases a number of blemishes in the captured image,
wherein the housing includes a base portion and an extension portion, the base portion coupled to the image sensor, the barrel rotatably coupled to the extension portion, and the lens maintained at least partially within the barrel such that the dust trap substance is adhered to the extension portion at positions of interaction between the barrel and the extension portion.
2. The camera module of claim 1 , wherein the dust trap substance is an adhesive grease.
3. The camera module of claim 1 , wherein the dust trap substance includes a silicone grease.
4. The camera module of claim 1 , wherein the dust trap substance includes an organopolysiloxane mixture.
5. The camera module of claim 1 , wherein the dust trap substance is tolerant of temperatures over 60° degrees C.
6. The camera module of claim 1 , wherein the dust trap substance has a viscosity preventing migration of the dust trap substance from an area of the housing to which the dust trap substance was initially applied.
7. The camera module of claim 1 , wherein the dust trap substance is a non-gas producing substance.
8. The camera module of claim 1 , wherein each of the cavities includes a threaded portion and the dust trap substance is applied to the threaded portion thereof with a thickness of about 10 μm.
9. The camera module of claim 1 , wherein the dust trap substance that is adhered to the extension portion at the positions of interaction between the barrel and the extension portion is configured to circumferentially surround the barrel such that dust particles are substantially prevented from migrating from outer edges of the housing and substrate to the die.
10. A camera module for capturing an image, the camera module comprising:
a barrel;
a lens;
an image sensor;
a housing coupled with the image sensor; and defining a plurality of individual cavities; an adhesive grease attached to the individual cavities; and
a plurality of individual fasteners extending through the individual cavities, respectively, to attach the housing to the substrate via the plurality of cavities, each cavity and a respective fastener defining a respective mating region therebetween,
wherein the adhesive grease is adhered to at least the respective mating region for capturing dust particles within the housing to decrease the number of dust particles impacting the image sensors;
wherein the housing includes a base portion and an extension portion, the base portion coupled to the image sensor, the barrel being rotatably coupled to the extension portion, and the lens maintained at least partially within the barrel such that a dust trap substance is adhered to the extension portion at positions of interaction between the barrel and the extension portion.
11. The camera module of claim 10 , wherein the adhesive grease includes a silicone grease.
12. The camera module of claim 10 , wherein the adhesive grease is tolerant of temperatures over 60° degree C.
13. The camera module of claim 10 , wherein the adhesive grease has a viscosity preventing migration of the adhesive grease from an area of the housing to which the adhesive grease was initially applied.
14. A method of decreasing blemishes to a digital image of a camera module which includes a housing having a plurality of individual mating units, the method comprising:
assembling a camera module including:
adhering a dust trap substance to the individual mating units of the housing;
coupling the housing to an image sensor including a die, and wherein coupling of the housing to the image sensor substantially encloses the die and includes trapping at least one dust particle within the camera module;
decreasing the number of dust particles to impact the die by capturing and maintaining one of the at least one dust particles within the dust trap substance; and rotatably coupling a barrel to the housing,
wherein the adhering of the dust trap substance to the housing includes adhering the dust trap substance to areas of interaction between the barrel and the housing.
15. The method of claim 14 , wherein coupling the housing to an image sensor includes
placing a fastener through a cavity of each respective mating unit and into a substrate of the image sensor and adhering the dust trap substance to the housing includes adhering the dust trap substance within each respective cavity.
16. The method of claim 14 , wherein the dust trap substance is a silicone grease.
17. The method of claim 14 , wherein decreasing the number of dust particles to impact the die decreases the number of visible blemishes to the digital image produced by the camera module.