Patent Application
20200314301
The subject matter herein generally relates to lens modules, and more specifically to a lens module having an improved imaging function.
More and more electronic devices come equipped with lens modules for imaging functions. However, when a lens module captures an image, light at a specific angle may enter an inner wall of a lens barrel of the lens module, and the light will be reflected and refracted by the lens barrel to an image sensor, which increases glare in the captured image.
Implementations of the present disclosure will now be described, by way of embodiments, with reference to the attached figures.
It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. Additionally, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein.
Several definitions that apply throughout this disclosure will now be presented.
The term “comprising” means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like.
Referring to
Referring to
An end of the peripheral wall 11 opposite the top wall 13 is fixed on a circuit board (not shown) in the electronic device. The top wall 13 is located outside the electronic device.
A light transmission hole 130 is formed in a middle of the top wall 13. The light transmission hole 130 communicates with the receiving cavity 101 to transmit external light therethrough. The top wall 13 includes a light shielding portion 131. The light shielding portion 131 surrounds an opening of the light transmission hole 130. A distal end of the light shielding portion 131 extends toward the plurality of lenses 21. The light shielding portion 131 is configured to block light from entering the receiving cavity 101 between the top wall 13 and the plurality of lenses 21.
The light shielding portion 131 includes a sidewall 1312. The sidewall 1312 is located on a side of the light shielding portion 131 facing away from the peripheral wall 11. The sidewall 1312 is gradually closer to an optical axis of the plurality of lenses 21 in a direction toward the plurality of lenses 21. The sidewall 1312 has an included angle θ with the optical axis. The included angle θ ranges from 15° to 30°. In one embodiment, the included angle θ is 25°.
It can be understood that in other embodiments, the sidewall 1312 may be curved, and a value of the included angle θ ranges from a tangent line at a distal end of the sidewall 1312 to the optical axis.
It can be understood that in other embodiments, the included angle θ may be any value, as long as the light shielding portion 131 blocks light.
A plurality of annular protrusions 112 is provided on an inner side of the peripheral wall 11. Along a direction toward the top wall 13, the plurality of annular protrusions 112 protrudes closer toward a center of the lens barrel 10. The receiving cavity 101 is surrounded by the plurality of annular protrusions 112 to form a first cavity 1011, a second cavity 1012, a third cavity 1013, a fourth cavity 1014, a fifth cavity 1015, a sixth cavity 1016, a seventh cavity 1017, and an eighth cavity 1018. The first cavity 1011, the second cavity 1012, the third cavity 1013, the fourth cavity 1014, the fifth cavity 1015, the sixth cavity 1016, the seventh cavity 1017, and the eighth cavity 1018 are coaxial and sequentially gradually increase in diameter. The first cavity 1011 is located adjacent to the top wall 13.
The plurality of lenses 21 includes a first lens 211, a second lens 212, a third lens 213, and a fourth lens 214. The first lens 211, the second lens 212, the third lens 213, and the fourth lens 214 sequentially gradually increase in diameter. The first lens 211, the second lens 212, the third lens 213, and the fourth lens 214 are sequentially stacked and housed in the receiving cavity 101.
The first lens 211 is received in the first cavity 1011. An outer side of the second lens 212 is received in the third cavity 1013, and a middle portion of the second lens 212 protrudes into the second cavity 1012. An outer side of the third lens 213 is received in the fourth cavity 1014, and a middle portion of the third lens 213 is recessed into the fifth cavity 1015. The fourth lens 214 is received in the sixth cavity 1016, and a portion of the fourth lens 214 is recessed into the seventh cavity 1017.
The spacer 23 is received in the fifth cavity 1015, and two sides of the spacer 23 respectively support edge portions of the third lens 213 and the fourth lens 214. The retainer 24 is received in the seventh cavity 1017 and is used for supporting the fourth lens 214.
It can be understood that in other embodiments, a plurality of the spacers 23 may be used to support multiple lenses.
The plurality of somas 22 are respectively located between the first lens 211 and the second lens 212, the second lens 212 and the third lens 213, and the third lens 213 and the spacer 23. The plurality of somas 22 are respectively used to block light from exiting from an edge of the plurality of lenses 21.
It can be understood that in other embodiments, the number of the somas 22 is at least one.
An image sensor 200 and other components (such as a filter, not shown) are housed in the eighth cavity 1018.
Since the light shielding portion 131 needs to avoid interference with the plurality of lenses 21 while blocking light, an end of the light shielding portion 131 is relatively sharp. By providing the sidewall 1312 on the side of the light shielding portion 131 facing away from the peripheral wall 11, the light shielding portion 131 is made easier to process and produce by injection molding. Limiting the range of the included angle θ from 15° to 30° can make the ends of the light shielding portion 131 sharper to improve the light-shielding effect without increasing the difficulty of injection molding.
The embodiments shown and described above are only examples. Even though numerous characteristics and advantages of the present technology have been set forth in the foregoing description, together with details of the structure and function of the present disclosure, the disclosure is illustrative only, and changes may be made in the detail, including in matters of shape, size and arrangement of the parts within the principles of the present disclosure up to, and including, the full extent established by the broad general meaning of the terms used in the claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 201910248381.8 | Mar 2019 | CN | national |
