Lens module and lens protective film

A lens protective film includes a base layer, a buffer layer, and a protective layer. The buffer layer and the protective layer are laminated on the base layer. The base layer includes a main body and a first handle extending from the main body. An opening is defined in each of the main body and the buffer layer. The openings of the main body and the buffer layer overlap to form the receiving structure. The receiving structure is used to receive a raised part of a lens. The lens protective film can prevent the buffer layer and the protective layer from being broken and generating debris.

FIELD

The subject matter of the application relates to a lens module and a lens protective film.

BACKGROUND

Electronic devices may have lenses for capturing images. After the lens has been manufactured, a lens protective film needs to be placed on the lens. The lens protective film not only prevents damage to the lens during subsequent processes, but also prevents dust from entering into the inside of the lens during transportation. In the prior art, the lens protective film on the lens is also needed in an optical test of the lens. However, the optical properties of the lens protective film are generally poor, so that the optical test of the lens may be ineffective. In the prior art, the lens protective film is provided with a handle for pulling the lens protective film on the side away from the lens, but the lens protective film may break during pulling the lens protective film outward, thereby debris may enter into the lens. Debris in the lens will affect imaging quality of the lens.

Therefore, there is room for improvement in the art.

DETAILED DESCRIPTION

FIG. 1shows a lens module100, the lens module100includes a lens protective film10and a lens20. The lens protective film10is formed on the lens20. A part of the lens20is received in the lens protective film10. The lens protective film10is used not only to prevent damage to the lens during the soldering process, but also avoid dust entering into the inside of the lens during transportation. The lens20can be an image acquisition component suitable for a mobile terminal.

Referring toFIG. 2, the lens protective film10includes a base layer11, a buffer layer13, an insulating layer15, a protective layer16, and a solder mask layer18, which are laminated in that order. The lens protective film10further includes two adhesive layers12. The buffer layer13connects to the base layer11by one of the adhesive layers12. The insulating layer15connects to the buffer layer13by another one of the adhesive layers12. The lens protective film10further includes a cover plate17formed on one surface of the base layer11. In at least one embodiment, the cover plate17and the protective layer16are on opposite surfaces of the base layer11. An opening19is defined in each of the base layer11, the adhesive layers12, the buffer layer13, and the insulating layer15. The openings19of the base layer11, the adhesive layers12, the buffer layer13, and the insulating layer15overlap at least partially. In at least one embodiment, the openings19of the base layer11, the adhesive layers12, the buffer layer13, and the insulating layer15completely overlap to form the receiving structure101. A raised part of the lens20is received in the receiving structure101.

The base layer11includes a main body111and a first handle112. The first handle112extends from the main body111. That is, the first handle112closely connects with the main body111. The lens protective film10can be detached from the lens20by pulling the first handle112. The opening19of the base layer11is defined in the main body111. The main body111is adjacent to and touches the lens20. The first handle112does not touch the lens20.

The base layer11can be made from insulation materials, such as silica gel (Si). The base layer11is capable of electrostatic shielding.

The base layer11may be made from a flexible material or a non-flexible material. In at least one embodiment, the base layer11is made from a flexible material having flexibility and ductility, and the material of the base layer11may be an organic material such as a silica gel (Si) material, polyimide (PI), polyethylene naphthalate two formic acid glycol ester (PEN), or polyethylene glycol terephthalate (PET). In other embodiments, the base layer11may also be made from a non-flexible material having a certain rigidity, and the base layer11may be silicon dioxide (SiO2) or polycarbonate (PC).

The buffer layer13is formed on one surface of the base layer11away from the lens20. In at least one embodiment, the buffer layer13is formed on the main body111. The opening19of the buffer layer13and the opening19of the base layer11overlap at least partially. In at least one embodiment, the opening19of the buffer layer13and the opening19of the base layer11overlap completely.

The buffer layer13has a deep thickness and a good elastic modulus with respect to other layers. The buffer layer13provides good pressure resistance, impact resistance, and good physical protection for the lens20. In at least one embodiment, the buffer layer13may be made from foam. In other embodiments, the buffer layer13may also be made from other organic materials (such as epoxy resin) or inorganic materials (such as silica gel).

The insulating layer15is formed on one surface of the buffer layer13away from the base layer11. In at least one embodiment, the insulating layer15is arranged to correspond with the main body111. The opening19of the buffer layer13and the opening19of the insulating layer15overlap at least partially. In at least one embodiment, the opening19of the buffer layer13and the opening19of the insulating layer15overlap completely. The insulating layer15has poor or no electrical conductivity and the insulating layer15may be an insulating rubber.

In at least one embodiment, the adhesive layer12is disposed between the base layer11and the buffer layer13, and also disposed between the buffer layer13and the insulating layer15. In other embodiments, the adhesive layer12also may be disposed between other elements to enhance the adhesion between the elements.

The adhesive layer12has an adhesive ability, and the material of the adhesive layer12may be at least one of an epoxy resin, a polyester fiber, an acrylic resin, a polyurethane, an unsaturated polyester, and an organic silica gels.

The protective layer16is formed on one surface of the insulating layer15away from the buffer layer13. The protective layer16completely covers regions corresponding to the openings19of the base layer11, the adhesive layer12, the buffer layer13, and the insulating layer15.

The protective layer16is made from a transparent material having a high light transmittance. In at least one embodiment, the light transmittance of the protective layer16is greater than or equal to 80%. In other embodiments, the light transmittance of the protective layer16is greater than 93%. It can be understood that the higher the light transmittance of the protective layer16is, the smaller the effect of the lens protective film10on the lens20during the optical test of the lens20is.

In at least one embodiment, the solder mask layer18is detachably disposed on the outermost side of the lens protective film10away from the lens20. In at least one embodiment, the solder mask layer18is disposed on a side of the protective layer16away from the insulating layer15. The solder mask layer18includes a second handle182disposed at an edge of the solder mask layer18. The solder mask layer18can be peeled off from the lens protective film10by pulling the second handle182. The solder mask layer18can be used to prevent soldering spatters generated in the soldering process for the lens20from falling on the protective layer16, and prevent the soldering spatters affecting the optical test of the lens20. After the soldering is completed, the s solder mask layer18can be selectively stripped. In at least one embodiment, the solder mask layer18is a material that has a slight adhesion capability. The solder mask layer18does not need to be bonded to other components in the lens protective film10by additional adhesive, thereby minimizing the effect of the solder mask layer18on the surface of other adjacent components when the solder mask layer18is stripped.

The cover plate17has an area that is smaller than that of the first handle112. The cover plate17is attached to a surface of the first handle112for reinforcing the first handle112to prevent the first handle112from being broken during the first handle112is being pulled.

FIG. 1shows a protective film30of the present disclosure. The protective film30is formed on a lens20. A part of the lens20is received in the protective film30. The protective film30is used not only to prevent damage to the lens, but also to avoid dust entering into the inside of the lens during transportation. The lens20can be an image acquisition component suitable for a mobile terminal.

Referring toFIG. 3, a second embodiment is shown. In this second embodiment, the protective film30includes a base layer31, a protective layer36, a buffer layer33, an insulating layer35, and a solder mask layer38, laminated in that order. The protective film30further includes adhesive layers32. The protective layer36connects to the base layer31by one of the adhesive layers32. The insulating layer35connects to the buffer layer33by one of the adhesive layers32. The protective film30further includes a cover plate37formed on one surface of the base layer31. An opening39is defined in each of the base layer31, the adhesive layers32, the buffer layer33, and the insulating layer35. The openings39of the base layer31, the adhesive layers32, the buffer layer33, and the insulating layer35overlap at least partially. In at least one embodiment, the openings39of the base layer31, the adhesive layers32, the buffer layer33, and the insulating layer35completely overlap to form the receiving structure301. A raised part of the lens20is received in the receiving structure301.

The base layer31includes a main body311and a first handle312. The first handle312extends from the main body311. That is, the first handle312closely connects with the main body311. The protective film30can be detached from the lens20by pulling the first handle312. The opening39of the base layer31is defined in the main body311. The main body311is adjacent to and touches the lens20. The first handle312does not touch the lens20.

The base layer31can be made from insulation materials, such as silica gel (Si). The base layer31is capable of electrostatic shielding.

The base layer31may be made from a flexible material or a non-flexible material. In at least one embodiment, the base layer31is a flexible material having flexibility and ductility, and the material of the base layer31may be made from an organic material such as a silica gel (Si) material, polyimide (PI), polyethylene naphthalate two formic acid glycol ester (PEN), or polyethylene glycol terephthalate (PET). In other embodiments, the base layer31may also be made from a non-flexible material having a certain rigidity, and the base layer31may be silicon dioxide (SiO2) or polycarbonate (PC).

The protective layer36is formed on one surface of the base layer31away from the lens20. The protective layer36completely covers the region corresponding to the opening19of the base layer31.

The protective layer36is made from a transparent material having a high light transmittance. In at least one embodiment, the light transmittance of the protective layer36is greater than or equal to 80%. In other embodiments, the light transmittance of the protective layer36is greater than 93%. It can be understood that the higher the light transmittance of the protective layer36is, the smaller the effect of the lens protective film10on the lens20during the optical test of the lens20is.

Referring toFIG. 4, in at least one embodiment, the protective layer36is made from an elastic material having a high modulus of elasticity and a good deformability. When the protective film30is attached to the lens20, the raised part of the lens20is received in the receiving structure301. At least part of the protective layer36corresponding to the opening39of the base layer31is attached on at least one surface of the raised part of the lens20. The protective layer36is deformed according to the depth at which the lens20enters the receiving structure301.

The buffer layer33is formed on one surface of the protective layer36away from the base layer31. In at least one embodiment, the buffer layer33is formed on the main body311. The opening39of the buffer layer33and the opening39of the base layer31overlap at least partially. In at least one embodiment, the opening39of the buffer layer33and the opening39of the base layer31overlap completely.

The buffer layer33has a deep thickness and a good elastic modulus with respect to other layers. The buffer layer33provides good pressure resistance, impact resistance, and good physical protection for the lens20. In at least one embodiment, the buffer layer33may be made from foam. In other embodiments, the buffer layer33may also be made from other organic materials (such as epoxy resin) or inorganic materials (such as silica gel).

The insulating layer35is formed on one surface of the buffer layer33away from the base layer31. In at least one embodiment, the insulating layer35is arranged to correspond with the main body311. The opening39of the buffer layer33and the opening39of the insulating layer35overlap at least partially. In at least one embodiment, the opening39of the buffer layer33and the opening39of the insulating layer35overlap completely. The insulating layer35has poor or no electrical conductivity and the insulating layer35may be an insulating rubber.

In at least one embodiment, the adhesive layer32is disposed between the base layer31and the protective layer36, and is also disposed between the buffer layer33and the insulating layer35. In other embodiments, the adhesive layer32also may be disposed between other elements to enhance the adhesion between the elements.

The adhesive layer32has an adhesive ability, and the material of the adhesive layer32may be at least one of an epoxy resin, a polyester fiber, an acrylic resin, a polyurethane, an unsaturated polyester, and an organic silica gels.

In at least one embodiment, the solder mask layer38is detachably disposed on the outermost side of the protective film30away from the lens20. In at least one embodiment, the solder mask layer38is disposed on a side of the insulating layer35away from the buffer layer33. The solder mask layer38includes a second handle382disposed at an edge of the solder mask layer38. The solder mask layer38can be peeled off from the protective film30by pulling the second handle382. The solder mask layer38can be used to prevent soldering spatters generated in the soldering process for the lens20from falling on the protective layer36, and prevent the soldering spatters affecting the optical test of the lens20. After the soldering is completed, the s solder mask layer38can be selectively stripped. In at least one embodiment, the solder mask layer38is a material that has a slight adhesion capability. The solder mask layer38does not need to be bonded to other components in the protective film30by additional adhesive, thereby minimizing the effect of the solder mask layer38on the surface of other adjacent components when the solder mask layer38is stripped.

The cover plate37has an area that is smaller than that of the first handle312. The cover plate37is attached to a surface of the first handle312for reinforcing the first handle312to prevent the first handle312from being broken when the first handle312is pulled.

The protective film30of the present disclosure, the base layer31is disposed on a side close to the lens20, and the first handle312is disposed on the base layer31. When the protective film30is peeled, the buffer layer33and the protective layer36receive a thrust force along a direction away from the lens20, rather than a pulling force. At this time, the base layer31is also separated from the lens20, thereby preventing the buffer layer33and the protective layer36from being broken and generating debris when the buffer layer33and the protective layer36are tightened in a direction away from the lens20and in a direction of the lens20. Moreover, by using the protective layer36having a high light transmittance, the lens20can still allow effective optical testing while the lens protective film30is attached on the lens20, thereby simplifying the flow and reducing the cost. Furthermore, by providing the solder mask layer38on the outermost side of the lens protective film30away from the lens20, the spatter-damage to the protective layer36is avoided, and the precision of the optical test of the lens20is further improved.