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EP-4738858-A1 - CAMERA MODULE AND ELECTRONIC DEVICE COMPRISING SAME

EP4738858A1EP 4738858 A1EP4738858 A1EP 4738858A1EP-4738858-A1

Abstract

An electronic device according to one embodiment of the present disclosure may comprise: a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis direction toward an upper side from a subject side; and an image sensor disposed to receive the light focused or guided by the lens assembly. The first lens may have positive refractive power. The second lens may have negative refractive power, and the third lens may have positive refractive power. At least one of a subject-side surface and an image-side surface of the second lens (L2S) may have an inflection point.

Inventors

  • KIM, DONGWOO

Assignees

  • Samsung Electronics Co., Ltd.

Dates

Publication Date
20260506
Application Date
20240726

Claims (15)

  1. An electronic device (2101) comprising: a lens assembly (100; 200; 300; 400; 500) including a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4), which are disposed along an optical axis direction from an object side toward an image side; and an image sensor (IS) disposed to receive light focused or guided by the lens assembly, wherein the first lens (L1) has a positive refractive power, the second lens (L2) has a negative refractive power, and the third lens (L3) has a positive refractive power, wherein at least one of an object-side surface or an image-side surface of the second lens (L2) has an inflection point, and wherein the electronic device satisfies the following [Formula 1] and [Formula 2], 0.03 ≤ OAL HFoV ≤ 0.045 80 ≤ FoV ≤ 110 where 'OAL' is a distance from an object-side surface of the first lens to an image plane, HFoV is a half field of view of an optical system including the lens assembly, and FoV is a field of view of the optical system including the lens assembly.
  2. The electronic device of claim 1, wherein the electronic device satisfies the following [Formula 3], 32 ≤ Vd 1 − Vd 2 ≤ 39 where 'Vd1' is an Abbe number of the first lens, and 'Vd2' is an Abbe number of the second lens.
  3. The electronic device of claim 1 or 2, wherein the image-side surface of the second lens has an inflective shape in which a chief portion thereof adjacent to an optical axis is concave toward the image side, and a marginal portion thereof is convex toward the image side.
  4. The electronic device of claim 3, wherein the object-side surface of the second lens is convex toward the object side.
  5. The electronic device of any one of claims 1 to 4, wherein an object-side surface of the first lens is convex toward the object side, and an image-side surface of the first lens is convex or concave toward the image side.
  6. The electronic device of any one of claims 1 to 5, wherein the third lens has a meniscus shape in which an object-side surface and an image-side surface are convex toward the image side.
  7. The electronic device of any one of claims 1 to 6, wherein an aperture stop is disposed at a position adjacent to the object-side surface or the image-side surface of the first lens.
  8. The electronic device of any one of claims 1 to 7, wherein the electronic device satisfies the following [Formula 4], 1.5 ≤ nd 3 ≤ 1.65 where 'nd3' is a d-line refractive index of the third lens.
  9. The electronic device of any one of claims 1 to 8, wherein the electronic device satisfies the following [Formula 5], 0.6 ≤ f 3 f 1 ≤ 4.5 where 'f1' is a focal length of the first lens, and 'f3' is a focal length of the third lens.
  10. The electronic device of any one of claims 1 to 9, wherein the fourth lens has a meniscus shape in which an object-side surface and an image-side surface are convex toward the object side.
  11. The electronic device of any one of claims 1 to 10, wherein each of the object-side surface and the image-side surface of the fourth lens has an inflective shape where radii of curvature of a chief portion adjacent to the optical axis and a marginal portion have opposite signs.
  12. The electronic device of any one of claims 1 to 11, wherein the electronic device satisfies the following [Formula 6], 1.3 ≤ OAL IH ≤ 1.6 where 'OAL' is the distance from the object-side surface of the first lens to the image plane, and 'IH' is a maximum height of the image plane.
  13. The electronic device of any one of claims 1 to 12, wherein the electronic device is a laptop computer.
  14. The electronic device of any one of claims 1 to 13, wherein the first lens, the second lens, the third lens, and the fourth lens are made of plastic aspheric lenses.
  15. The electronic device of any one of claims 1 to 14, wherein the distance from the object-side surface of the first lens to the image plane is less than or equal to approximately 1.8mm.

Description

[Technical Field] Various embodiments of the disclosure relate to, for example, a small-sized camera module and an electronic device including the same. [Background Art] Along with the development of information and communication technology and semiconductor technology, the distribution and use of various electronic devices have been rapidly increasing. In particular, recent electronic devices have been developed to be portable and capable of communication. In addition, the electronic devices may output stored information as audio or video. For example, an electronic device (e.g., a laptop computer) may be equipped with entertainment functions such as games, multimedia functions such as music/video playback, and document composition functions, as well as video conferencing, and photo and/or video capturing functions. In order to perform the video conferencing and photo and/or video capturing functions, a laptop computer may generally be equipped with a small-sized camera in a bezel surrounding a display. The above information is presented as related art only to assist with an understanding of the disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the disclosure. [Detailed Description of the Invention] [Technical Solution] According to embodiments of the disclosure, an electronic device may include a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis direction from an object side toward an image side, and an image sensor disposed to receive light focused or guided by the lens assembly. The first lens may have a positive refractive power. The second lens may have a negative refractive power, and the third lens may have a positive refractive power. At least one of an object-side surface or an image-side surface of the second lens (L2) may have an inflection point. In an embodiment, the electronic device may satisfy the following [Formula 1] and [Formula 2].0.03≤OALHFoV≤0.04580≤FoV≤110 Herein, 'OAL' is a distance from an object-side surface of the first lens to an image plane, HFoV is a half field of view of an optical system including the lens assembly, and FoV is a field of view of the optical system including the lens assembly. According to embodiments of the disclosure, an electronic device may include a display, a bezel structure surrounding at least a portion of the display, and a camera module disposed in the bezel structure. The camera module may include a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed along an optical axis direction from an object side toward an image side, and an image sensor disposed to receive light focused or guided by the lens assembly. The first lens (L1) may have a positive refractive power. The second lens (L2) may have a negative refractive power, and the third lens (L3) may have a positive refractive power. At least one of an object-side surface or an image-side surface of the second lens (L2) may have an inflection point. The image-side surface of the second lens may have an inflective shape in which a chief portion adjacent to an optical axis is concave, and a marginal portion is convex. In an embodiment, the electronic device may satisfy the following [Formula 1] and [Formula 2].0.03≤OALHFoV≤0.04580≤FoV≤110 Herein, 'OAL' is a distance from an object-side surface of the first lens to an image plane, HFoV is a half field of view of an optical system including the lens assembly, and FoV is a field of view of the optical system including the lens assembly. [Brief Description of Drawings] The above or other aspects, configurations, and/or advantages of an embodiment of the disclosure may be more apparent from the following detailed description with reference to the accompanying drawings. FIG. 1A is a configuration diagram illustrating a lens assembly according to an embodiment of the disclosure.FIG. 1B is an enlarged view illustrating a second lens portion of FIG. 1A.FIG. 2 is a graph illustrating spherical aberration of the lens assembly according to the embodiment of FIG. 1A.FIG. 3 is a graph illustrating astigmatism of the lens assembly according to the embodiment of FIG. 1A.FIG. 4 is a graph illustrating distortion of the lens assembly according to the embodiment of FIG. 1A.FIG. 5 is a configuration diagram illustrating a lens assembly according to an embodiment of the disclosure.FIG. 6 is a graph illustrating spherical aberration of the lens assembly according to the embodiment of FIG. 5.FIG. 7 is a graph illustrating astigmatism of the lens assembly according to the embodiment of FIG. 5.FIG. 8 is a graph illustrating distortion of the lens assembly according to the embodiment of FIG. 5.FIG. 9 is a configuration diagram illustrating a lens assembly according to an embodiment of the disclosure.FIG. 10 is a graph illustrating spherical aberration of the lens assembly a