Camera module and electronic device including the same

Abstract

An electronic device according to one embodiment of the present disclosure may include: a lens assembly including a first lens, a second lens, a third lens, and a fourth lens disposed upward from an object side along an optical axis direction; and an image sensor disposed to receive the 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 and an image-side surface of the second lens (L2S) may have an inflection point.

Description

Technical Field

[0001] Various embodiments of this disclosure relate to, for example, a small-sized camera module and an electronic device including the camera module. Background Technology

[0002] With the development of information and communication technologies and semiconductor technologies, the popularity and use of various electronic devices have grown rapidly. In particular, recent electronic devices have been developed to be portable and capable of communication. Furthermore, electronic devices can output stored information as audio or video. For example, electronic devices (e.g., laptop computers) may be equipped with entertainment functions (such as games), multimedia functions (such as music / video playback), document synthesis functions, video conferencing, and photo and / or video capture functions.

[0003] To perform video conferencing and photo and / or video capture functions, laptops are typically equipped with a small camera located within the bezel surrounding the display.

[0004] The above information is presented as prior art only to aid in understanding this disclosure. No determination or assertion is made as to whether anything described above can be used as prior art with respect to this disclosure. Summary of the Invention

[0005] Technical solution According to embodiments of this 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 the optical axis from the object side to the image side; and an image sensor configured to receive 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 surface of the object side or the image side of the second lens L2 may have an inflection point.

[0006] In the embodiments, the electronic device may satisfy the following [Equation 1] and [Equation 2].

[0007] [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 Here, "OAL" is the distance from the object surface of the first lens to the image plane, HFoV is the half field of view of the optical system including the lens assembly, and FoV is the field of view of the optical system including the lens assembly.

[0008] According to embodiments of this disclosure, an electronic device may include a display, a bezel structure surrounding at least a portion of the display, and a camera module disposed within 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 the optical axis from the object side to the image side; and an image sensor configured to receive light focused or guided by the lens assembly. The first lens L1 may have positive refractive power. The second lens L2 may have negative refractive power, and the third lens L3 may have positive refractive power. At least one surface of the object side or image side of the second lens L2 may have an inflection point. The image side surface of the second lens may have a recurved shape with a central portion concave and an edge portion convex adjacent to the optical axis.

[0009] In the embodiments, the electronic device may satisfy the following [Equation 1] and [Equation 2].

[0010] [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 Here, "OAL" is the distance from the object surface of the first lens to the image plane, HFoV is the half field of view of the optical system including the lens assembly, and FoV is the field of view of the optical system including the lens assembly. Attached Figure Description

[0011] The above or other aspects, constructions and / or advantages of embodiments of the present disclosure will be more readily understood from the following detailed description with reference to the accompanying drawings.

[0012] Figure 1a This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure.

[0013] Figure 1b It is shown Figure 1a An enlarged view of the second lens section.

[0014] Figure 2 It shows the basis Figure 1a A graph showing the spherical aberration of the lens assembly in an embodiment.

[0015] Figure 3 It shows the basis Figure 1a A graph showing the astigmatism of the lens assembly in an embodiment.

[0016] Figure 4 It shows the basis Figure 1a A graph showing the distortion of the lens assembly in an embodiment.

[0017] Figure 5 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure.

[0018] Figure 6 It shows the basis Figure 5 A graph showing the spherical aberration of the lens assembly in an embodiment.

[0019] Figure 7 It shows the basis Figure 5 A graph showing the astigmatism of the lens assembly in an embodiment.

[0020] Figure 8 It shows the basis Figure 5 A graph showing the distortion of the lens assembly in an embodiment.

[0021] Figure 9 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure.

[0022] Figure 10 It shows the basis Figure 9 A graph showing the spherical aberration of the lens assembly in an embodiment.

[0023] Figure 11 It shows the basis Figure 9 A graph showing the astigmatism of the lens assembly in an embodiment.

[0024] Figure 12 It shows the basis Figure 9 A graph showing the distortion of the lens assembly in an embodiment.

[0025] Figure 13 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure.

[0026] Figure 14 It shows the basis Figure 13 A graph showing the spherical aberration of the lens assembly in an embodiment.

[0027] Figure 15 It shows the basis Figure 13 A graph showing the astigmatism of the lens assembly in an embodiment.

[0028] Figure 16 It shows the basis Figure 13 A graph showing the distortion of the lens assembly in an embodiment.

[0029] Figure 17 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure.

[0030] Figure 18 It shows the basis Figure 17 A graph showing the spherical aberration of the lens assembly in an embodiment.

[0031] Figure 19 It shows the basis Figure 17 A graph showing the astigmatism of the lens assembly in an embodiment.

[0032] Figure 20 It shows the basis Figure 17 A graph showing the distortion of the lens assembly in an embodiment.

[0033] Figure 21 This is a block diagram of an electronic device in a network environment according to various embodiments.

[0034] Figure 22 This is a block diagram illustrating a camera module according to various embodiments.

[0035] Throughout the accompanying drawings, similar reference numerals may be assigned to similar components, constructions, and / or structures. Detailed Implementation

[0036] The camera can be mounted in the bezel surrounding the display of a laptop computer. Due to the narrow area of ​​the bezel, the camera mounted therein may need to have a very compact size. Furthermore, the camera may need to adequately ensure back focal length (BFL) to provide space for arranging the main components, such as filters or image sensors, included within the camera. When considering the narrow mounting space and the required BFL when designing a camera for a laptop computer, the camera may be configured with a field of view of approximately 85 to approximately 88 degrees.

[0037] However, with the recent increase in video conferencing, there is a need to develop laptops that provide a user environment with a field of view of approximately 90 degrees or greater.

[0038] Various embodiments of this disclosure may provide a camera module and an electronic device including the camera module, the camera module being compactly configured to be disposed in an electronic device (e.g., a laptop computer) with a narrow space for component arrangement, while having a field of view of about 90 degrees or greater and optimal optical performance.

[0039] The technical objectives to be achieved by this disclosure are not limited to those described above, and those skilled in the art will clearly understand other technical objectives not mentioned.

[0040] The following will refer to Figures 1a to 20 Describe various implementation examples of the lens assembly and the components included therein.

[0041] Figure 1a This is a structural diagram showing a lens assembly 100 according to one of the various embodiments of the present disclosure. Figure 1b It is shown Figure 1a An enlarged view of the second lens section.

[0042] Reference Figure 1aThe lens assembly 100 according to one of the various embodiments of the present disclosure may include a plurality of lenses (e.g., L1, L2, L3, and L4) and an image sensor IS. The lens assembly 100 may form an optical system capable of covering a field of view of more than about 80 degrees by including a plurality of lenses (e.g., L1, L2, L3, and L4) and an image sensor IS, and according to embodiments, an optical system covering a field of view of up to about 100 degrees or even about 110 degrees.

[0043] According to various embodiments, the image sensor IS can be mounted in an electronic device. The electronic device (e.g., a laptop computer) may include a display, a bezel structure surrounding at least a portion of the display, and a camera module (e.g., ...) disposed within the bezel structure. Figure 21 Camera module 2180 and Figure 22 The camera module 2280. A lens assembly 100, including multiple lenses (e.g., L1, L2, L3, and L4), can be mounted in an optical and / or electronic device in which an image sensor IS is mounted. For example, in describing various embodiments of this disclosure, an example of the image sensor IS being disposed in the lens assembly 100 will be described. However, the image sensor IS can be mounted and used in an optical and / or electronic device in which the lens assembly 100 is mounted.

[0044] According to various embodiments, an image sensor IS, which is mounted on a circuit board (not shown) and aligned with the optical axis OI, can respond to light. The image sensor IS may include, for example, sensors such as complementary metal-oxide-semiconductor (CMOS) or charge-coupled devices (CCD). The image sensor IS is not limited to these and may include various elements, for example, that convert an image of an object into an electrical image signal. The image sensor IS can obtain an image of the object obj by detecting brightness information, contrast information, color information, etc., from light passing through multiple lenses (e.g., L1, L2, L3, and L4).

[0045] According to various embodiments, the plurality of lenses (e.g., L1, L2, L3, and L4) included in the lens assembly 100 may comprise plastic lenses. Additionally, the image sensor IS may have an image height of approximately 1.19 mm. For reference, for a thin image sensor formed in a generally rectangular (e.g., square) shape with the optical axis OI as its normal, the image height may refer to half the diagonal length of the image sensor. According to embodiments, the image sensor IS may be an image sensor with a size of 1 / 7" (approximately 0.14 inches).

[0046] According to various embodiments, the lens assembly 100 may have an optical axis OI from the object (or external object) side O toward the image side I. In describing the construction of each lens below, for example, the object side may refer to the direction in which the object obj is located, and the image side may refer to the direction in which the image plane img on which the image is formed is located. Additionally, the "object-side facing surface" of a lens may refer, for example, to the surface of the object obj in the direction relative to the optical axis OI, which in the figures represents the left (or front) surface of the lens. The "image-side facing surface" may refer to the surface of the image plane img in the direction relative to the optical axis OI, which in the figures indicates the right (or rear) surface of the lens. Here, the image plane img may be, for example, the portion where an imaging device or image sensor IS is disposed and forms an image.

[0047] At least one of the lenses included in the lens assembly 100, facing the object side O along the optical axis OI, can be defined as "facing in a first direction (or forward)," and facing the image side I along the optical axis OI, can be defined as "facing in a second direction (or backward)." According to various embodiments, when a lens (e.g., the first lens L1) includes a surface facing the object side O, the surface facing the object side O can be said to face the first direction. When a lens (e.g., the first lens L1) includes a surface facing the image side I, the surface facing the image side I can be said to face the second direction.

[0048] Reference Figure 1a According to various embodiments, the lens assembly 100 may include, for example, a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 arranged sequentially in the direction of the optical axis OI (e.g., from the object side O to the image side I) as a plurality of lenses (e.g., L1, L2, L3, and L4). The plurality of lenses (e.g., L1, L2, L3, and L4) may be configured to be aligned with the image sensor IS along the optical axis. When it is said that "the plurality of lenses (e.g., L1, L2, L3, and L4) are aligned with the image sensor IS along the optical axis," this may mean that the central portions of the plurality of lenses (e.g., L1, L2, L3, and L4) and the central portion of the image sensor IS are aligned to be located on the optical axis.

[0049] In describing a plurality of lenses (e.g., L1, L2, L3, and L4) according to various embodiments, the portion of each lens closer to the optical axis OI may be referred to hereinafter as the "center portion," and the portion farther from the optical axis OI (or closer to the edge of the lens) may be referred to hereinafter as the "edge portion." The center portion may be, for example, the portion of the first lens L1 that intersects the optical axis OI. The edge portion may be, for example, the portion of the first lens L1 spaced a predetermined distance from the optical axis. The edge portion may include, for example, the end of the lens farthest from the optical axis OI.

[0050] According to various embodiments, for configuring optical devices, a first lens L1 included in the lens assembly 100 may have positive refractive power, a second lens L2 may have negative refractive power, and a third lens L3 may have positive refractive power. For the fourth lens L4, either positive or negative refractive power can be selected. For example, the first lens L1, second lens L2, third lens L3, and fourth lens L4 may sequentially have "positive, negative, positive, and positive" or "positive, negative, positive, and negative" refractive powers. In the above embodiments, when light parallel to the optical axis OI is incident on a lens with positive refractive power, the light passing through the lens can converge. For example, a lens with positive refractive power can be a lens based on the principle of a convex lens. Conversely, when parallel light is incident on a lens with negative refractive power, the light passing through the lens can diverge. For example, a lens with negative refractive power can be a lens based on the principle of a concave lens.

[0051] According to various embodiments, compared to the other lenses (third lens L3 and fourth lens L4) in a lens assembly with four lenses, the first lens L1 and the second lens L2 can be constructed as small-aperture lenses with a relatively small effective diameter. "Effective diameter" can refer to the distance between one end and the other end of the lens's light-receiving boundary in a direction perpendicular to the optical axis OI. Since the lenses should be installed within the limited space within the electronic device, the overall length of the optical system can be reduced by implementing the first lens L1 and the second lens L2 as small-aperture lenses, wherein the first lens L1 is a lens with positive refractive power and the second lens L2 is a lens with negative refractive power.

[0052] According to various embodiments, surfaces S2, S3, S4, and S5 of the first lens L1 and the second lens L2 can be formed aspherical. By making surfaces S2, S3, S4, and S5 aspherical, spherical aberration that may occur in the first lens L1 and the second lens L2 can be reduced and / or prevented. Furthermore, surfaces S6, S7, S8, and S9 of the third lens L3 and the fourth lens L4 can also be formed aspherical.

[0053] According to the various embodiments, unless otherwise stated, the radius of curvature, thickness, total orbital length (OAL), and focal length of the lenses in this disclosure can all be in mm. Furthermore, the thickness of the lens, the gap between lenses, and the OAL (or total orbital length (TTL)) can be distances measured along the optical axis of the lens. When describing the shape of a lens, unless otherwise stated, a surface with a convex shape means that the optical axis portion of the surface is convex, such as having an inflection point. Unless otherwise stated, a surface with a concave shape means that the optical axis portion of the surface is concave, such as having an inflection point. For example, even if one surface of the lens (the optical axis portion of the surface) is described as convex, the edge portion (the portion spaced a certain distance from the optical axis portion of the surface) can be concave. Similarly, even if one surface of the lens (the optical axis portion of the surface) is described as concave, the edge portion (the portion spaced a certain distance from the optical axis portion of the surface) can be convex.

[0054] In the following description and claims, an inflection point may refer to a point where the radius of curvature changes in a portion that does not intersect the optical axis. An inflection point may be located at a point where a surface of the lens changes from convex to concave or from concave to convex. According to this disclosure, at least one of the object-side surface S4 or the image-side surface S5 of the second lens L2 may include an inflection point. According to an embodiment, the image-side surface S5 of the second lens L2 may have an inflective shape in which a central portion adjacent to the optical axis is concave and an edge portion is convex. Furthermore, according to an embodiment, the object-side surface S4 of the second lens L2 may also have an inflective shape in which a central portion adjacent to the optical axis is concave and an edge portion is convex. (See also...) Figure 1a and Figure 1b The second lens L2 may have a curved shape on both the object surface S4 and the image surface S5, and includes a first inflection point P1 on the object surface S4 and a second inflection point P2 on the image surface S5.

[0055] In the first lens L1, the surface S2 facing the object side O may bulge towards the object side O, and the surface S3 facing the image side I may bulge or be recessed towards the image side I. When the field of view of the optical system is less than 90 degrees, the overall focal length is longer than when the field of view is equal to or greater than 90 degrees, which may increase the OAL of the lens assembly. Therefore, when the field of view of the optical system is less than 90 degrees, the OAL of the lens assembly can be reduced by using a meniscus lens in which the surface S2 facing the object side O bulges towards the object side O and the surface S3 facing the image side I is recessed towards the image side I as the first lens L1. When the field of view of the optical system is equal to or greater than 90 degrees, as Figure 1a As shown, it may be advantageous to use a biconvex lens, in which the surface S2 facing the object side O convexes toward the object side O and the surface S3 facing the image side I convexes toward the image side I, as the first lens L1.

[0056] The lens assembly 100 may include at least one aperture stop S1. The amount of light reaching the image plane img of the image sensor IS can be adjusted depending on the position of the aperture stop. According to an embodiment, the aperture stop may be positioned in front of the first lens L1, adjacent to the object surface S2. Furthermore, according to an embodiment, the aperture stop may be positioned behind the first lens L1, adjacent to the image surface S3. Figure 1a In this configuration, the aperture stop is positioned in front of the first lens L1, adjacent to the object surface S2. This minimizes the outer diameter of the lens, thereby minimizing the diameter of the entrance pupil of the lens assembly.

[0057] In the second lens L2, the surface S4 facing the object side O can be convex or concave towards the object side O, and the surface S5 facing the image side I can be concave towards the image side I. When the field of view of the optical system is less than 90 degrees, a double-concave shape that is advantageous in reducing the OAL of the lens assembly and / or ensuring optical performance can be applied, for example, a shape in which the surface S4 facing the object side O is concave towards the object side O and the surface S5 facing the image side I is concave towards the image side I. Since the central portion of the second lens L2 has a concave shape, spherical aberration can be easily controlled. When the field of view of the optical system is equal to or greater than 90 degrees, a meniscus shape in which the surface S4 facing the object side O convex towards the object side O and the surface S5 facing the image side I is concave towards the image side I can be applied, thereby effectively controlling astigmatism occurring at the edge portions due to the resulting focal length shortening. (Refer to...) Figure 1a and Figure 1b Since the object-facing surface S4 and the image-facing surface S5 of the second lens L2 both have the inverted shape described above, these two surfaces can have a convex shape facing the image at their edge portions, thereby preventing the incident angle of edge light entering the image sensor IS from increasing.

[0058] The third lens L3 may have a meniscus shape in which both the object-side surface S6 and the image-side surface S7 convex toward the image side. According to an embodiment, when the image-side surface S5 of the second lens L2 is concave toward the image side, the object-side surface S6 of the third lens L3 is formed to be concave toward the object side. Therefore, the second lens L2 and the third lens L3 may have shapes symmetrical with respect to an imaginary line perpendicular to the optical axis between the second lens L2 and the third lens L3. This facilitates spherical aberration control. Furthermore, since the third lens L3 has a meniscus shape, it is beneficial to control astigmatism at the edge portions. According to an embodiment, both the object-side surface S6 and the image-side surface S7 of the third lens L3 may also have inverted shapes. For example, in the third lens L3, a third inflection point P3 may be formed on the object-side surface S6, and a fourth inflection point P4 may be formed on the image-side surface S7. Since the third lens L3 has a meniscus shape and / or includes inflection points, spherical aberration at the central portion of the lens and astigmatism at the edge portions of the lens can be effectively controlled.

[0059] The fourth lens L4 may have a meniscus shape with both the object-side surface S8 and the image-side surface S9 convex toward the object side. Because the fourth lens L4 has a meniscus shape convex toward the object side at its central portion, the size of the electronic device can be miniaturized, for example, even with a field of view exceeding 100 degrees, which is beneficial for ensuring the entire focal length (EFL) and back focal length (BFL). According to an embodiment, both the object-side surface S8 and the image-side surface S9 of the fourth lens L4 may have inverted shapes. For example, in the fourth lens L4, a fifth inflection point P5 may be formed on the object-side surface S8, and a sixth inflection point P6 may be formed on the image-side surface S9. Because the fourth lens L4 has a meniscus shape and / or includes inflection points, aberrations in the edge regions of the image sensor can be easily corrected. According to an embodiment, each of the object-side surface S8 and the image-side surface S9 of the fourth lens L4 may have an inverted shape in which the radii of curvature of the central and edge portions adjacent to the optical axis have opposite signs. This can be advantageous for controlling astigmatism at the edges and ensuring the intensity of light at the edges entering the image sensor.

[0060] According to various embodiments, the first lens L1 and the second lens L2 can be configured as lenses with small effective diameters to reduce the size of the optics, while the third lens L3 and the fourth lens L4 can be configured as lenses with relatively large effective diameters. According to an embodiment, in the lens assembly 100, the fourth lens L4 may have the largest effective diameter. By sequentially arranging the first lens L1, the second lens L2, the third lens L3, and the fourth lens L4 such that they have effective diameters that gradually increase towards the image sensor IS, aberrations can be effectively corrected.

[0061] According to various embodiments, the lens assembly 100 can be implemented using lenses all made of synthetic resin (e.g., plastic) having a specific refractive index. Using multiple lenses made of synthetic resin allows for a high degree of design freedom in terms of size and shape. For example, regarding the refractive index at a specific wavelength of visible light (e.g., 587.6000 nm, d-line), the first lens L1 can be made using a synthetic resin lens with a refractive index of 1.55 or less, the second lens L2 can be made using a synthetic resin lens with a refractive index of 1.66 or greater, the third lens L3 can be made using a synthetic resin lens with a refractive index of 1.55 or less, and the fourth lens L4 can be made using a synthetic resin lens with a refractive index of 1.55 or less. This refractive index design enables miniaturization of the lens assembly and / or the electronic device including the lens assembly. According to embodiments, lenses formed using synthetic resin (e.g., plastic) tend to have an Abbe number that increases or decreases as the refractive index decreases or increases.

[0062] According to various embodiments, the OAL of the lens assembly 100 can become shorter as the gap between adjacent lenses in the plurality of lenses (e.g., L1, L2, L3, and L4) forming the lens assembly 100 decreases. For example, it is advantageous to keep the OAL of the lens assembly 100 as short as possible when manufacturing electronic devices including the lens assembly 100 according to various embodiments of the present disclosure. However, there may be physical limitations to shortening the OAL of the lens assembly 100 while ensuring an appropriate telephoto ratio. According to various embodiments of the present disclosure, the gap between the plurality of lenses (e.g., L1, L2, L3, and L4) can be designed in various ways according to the optical characteristics (e.g., aberrations, wide-angle, and / or brightness characteristics) required for the lens assembly 100.

[0063] The lens assembly 100 may also include a filter F disposed between the fourth lens L4 and the image sensor IS. The filter F may include an object-side surface S10 and an image-side surface S11, and blocks light such as infrared light detected by the film of the optics or the image sensor. The filter F may include at least one of, for example, a low-pass filter or a cover glass. When the filter F is installed, the colors of the image detected and captured by the image sensor IS can be very similar to colors perceived by the human eye. Furthermore, the filter F may be configured to transmit visible light while emitting infrared light outwards, thereby preventing infrared light from reaching the image plane img of the image sensor.

[0064] The lens assembly 100 described above can be positioned in a narrow region and have a wide field of view range by satisfying the following [Equation 1] and [Equation 2].

[0065] [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 Here, "OAL" can represent the distance from the object surface S2 of the first lens L1 to the image plane img, HFoV can represent the half field of view of the optical system including the lens assembly, and FoV can represent the field of view of the optical system including the lens assembly. [Equation 1] represents the ratio of OAL to half field of view of the optical system including the lens assembly. When the lens assembly and / or electronics exceed the upper limit of [Equation 1], the OAL is too large relative to the field of view, which may make miniaturization difficult. Conversely, when it is below the lower limit, the OAL becomes too small to accommodate four lenses, making it difficult to ensure sufficient optical performance. [Equation 2] limits the field of view of the optical system including the lens assembly. When the lens assembly and / or electronics exceed the upper limit of [Equation 2], the short focal length may be advantageous for miniaturization, but it is difficult to ensure the BFL required for setting components such as filters or image sensors. Conversely, when it is below the lower limit, the long focal length leads to an increase in OAL, which may be detrimental to miniaturization.

[0066] In addition, the lens assembly 100 can satisfy the following [Equation 3].

[0067] [Formula 3] 32≤Vd1-Vd2≤39 Here, Vd1 may represent the Abbe number of the first lens L1, and Vd2 may represent the Abbe number of the second lens L2. [Equation 3] relates to the difference between the Abbe numbers of the first lens L1 and the second lens L2. When the lens assembly and / or electronics exceed the upper limit of [Equation 3], it may be difficult to apply synthetic resin (e.g., plastic lens), and when it is below the lower limit, it may be difficult to correct chromatic aberration.

[0068] In addition, the lens assembly 100 can satisfy the following [Equation 4].

[0069] [Formula 4] 1.5≤nd3≤1.65 Here, "nd3" can represent the d-line refractive index (e.g., 587.6000 nm) of the third lens L3. The refractive index of the second lens L2 can be set to 1.66 or greater, and [Equation 4] can be used to determine the refractive index of the third lens L3 relative to the refractive index of the second lens L2. When the lens assembly and / or electronics exceed the upper limit in [Equation 4], chromatic aberration may be difficult to control due to the small difference in refractive index between the second lens L2 and the third lens L3, and when it falls below the lower limit in [Equation 4], the refractive index of L3 becomes too small, which may make aberration control difficult.

[0070] In addition, the lens assembly 100 can satisfy the following [Equation 5].

[0071] [Formula 5] 0.6 ≤ f3 / f1 ≤ 4.5 Here, "f1" can be the focal length of the first lens L1, and "f3" can be the focal length of the third lens L3. When the lens assembly and / or electronic device exceeds the upper limit of [Equation 5], the focal length of the third lens L3 becomes too long relative to the focal length of the first lens L1, which may reduce the relative refractive power of the third lens L3. Therefore, miniaturization of the electronic device may be difficult. When the lens assembly and / or electronic device falls below the lower limit of [Equation 5], the relative refractive power of L3 becomes stronger, which may be beneficial for miniaturization of the electronic device, but increases the sensitivity of the optical system.

[0072] In addition, the lens assembly 100 can satisfy the following [Equation 6].

[0073] [Formula 6] 1.3 ≤ OAL / IH ≤ 1.6 Here, "OAL" can be the distance from the object surface S2 of the first lens L1 to the image plane img, and "IH" can be the maximum height of the image plane img. When the lens assembly and / or electronics exceed the upper limit of [Equation 6], the OAL of the lens assembly relative to the image height of the image sensor IS increases, which may make miniaturization of the lens assembly difficult. When the lens assembly and / or electronics fall below the lower limit, the space required for the four lenses and / or the distance between the lenses and the sensor decreases, resulting in insufficient assembly space for the image sensor IS and the filter F, and insufficient focus adjustment margin due to lens-specific focusing errors. Therefore, multiple focusing failures may occur during manufacturing.

[0074] The following [Table 1] lists the individual optical data for the four lenses (e.g., L1, L2, L3, and L4) and / or filters F included in the lens assembly 100. “obj” may represent an object, and “img” may represent the image plane of the image sensor IS. “S2 to S11” may represent the surfaces of the associated plurality of lenses (e.g., L1, L2, L3, and L4) and / or filters F. “S1” may represent the aperture stop. The y-radius may represent the radius of curvature of the lens, the thickness may represent the lens thickness or air gap, Nd may represent the refractive index of the medium (e.g., the lens), and Vd may represent the Abbe number of the lens. When the lens assembly 100 has an F-number of about 2.27, a field of view of about 95.92 degrees, a focal length of about 1.05 mm, and an image height (ImgH) of 1.19 for the image sensor IS, the lens assembly 100 can satisfy the above formula (and / or at least one of the above formulas) while having the optical data listed in [Table 1] below.

[0075] [Table 1]

[0076] The refractive index data in [Table 1] represent, for example, the refractive index at a wavelength of 587.6000 nm. [Table 2] and [Table 3] below list the aspherical coefficients of the four lenses (e.g., L1, L2, L3, and L4) included in the lens assembly 100. The aspherical coefficients can be calculated using the following [Equation 7].

[0077] [Formula 7]

[0078] Here, "x" can represent the distance (perpendicularity) from the vertex of the lens in the direction of the optical axis OI, "R" can represent the radius of curvature at the vertex of the lens, "y" can represent the distance in the direction perpendicular to the optical axis, "K" can represent the conic constant, and "Ai" can represent the aspherical coefficient.

[0079] [Table 2]

[0080] [Table 3]

[0081] Figure 2 It shows the basis Figure 1a A graph showing the spherical aberration of the lens assembly in an embodiment. Figure 3 It shows the basis Figure 1a A graph showing the astigmatism of the lens assembly in an embodiment. Figure 4 It shows the basis Figure 1a A graph showing the distortion of the lens assembly in an embodiment. (Refer to...) Figure 2 Spherical aberration can be the phenomenon where light passing through different parts of a lens (e.g., the central part and the edge parts) is focused at different locations.

[0082] exist Figure 2 In the diagram, the horizontal axis represents the degree of longitudinal spherical aberration, and the vertical axis represents the normalized distance from the center of the optical axis. This can show the variation of longitudinal spherical aberration according to the wavelength of light.

[0083] The longitudinal spherical aberration of the lens assembly 100 can be expressed for light having wavelengths of approximately 656.3000 nanometers (nm), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, and approximately 435.8000 nm, respectively. (Refer to...) Figure 2 It can be determined that the lens assembly 100 according to the various embodiments of the present disclosure has longitudinal spherical aberration in the visible light band limited to about +0.025 to about -0.025, exhibiting stable optical characteristics.

[0084] Reference Figure 3 When the tangential plane (or meridional plane) and the sagittal plane of a lens have different radii, astigmatism can refer to the mismatch between the focal points of light passing along the vertical and horizontal directions.

[0085] The astigmatism of lens assembly 100 is obtained at a wavelength of approximately 587.6000 nm. Dashed lines may represent astigmatism T in the tangential direction (e.g., tangential field curvature), and solid lines may represent astigmatism S in the sagittal direction (e.g., sagittal field curvature). Figure 3 As shown, the astigmatism of the lens assembly 100 according to various embodiments of the present disclosure is generally limited to +0.050 to -0.050, exhibiting stable optical characteristics.

[0086] Reference Figure 4 Because the optical magnification varies with the distance from the optical axis OI, distortion occurs. This can lead to distortion in the actual image plane (e.g., Figure 1aAn image on the theoretical image plane (img) appears larger or smaller than an image formed on the theoretical image plane.

[0087] exist Figure 4 In this context, the distortion of lens assembly 100 is a result obtained at a wavelength of approximately 587.6000 nm. Images captured using lens assembly 100 may experience some distortion at points far from the optical axis OI. However, in camera modules including lenses, such distortion is generally within a detectable range. According to embodiments of this disclosure, the distortion rate of lens assembly 100 is less than approximately 2.5%, which provides good optical characteristics.

[0088] Figure 5 This is a structural diagram illustrating a lens assembly according to an embodiment. Figure 6 It shows the basis Figure 5 A graph showing the spherical aberration of the lens assembly in an embodiment. Figure 7 It shows the basis Figure 5 A graph showing the astigmatism of the lens assembly in an embodiment. Figure 8 It shows the basis Figure 5 A graph showing the distortion of the lens assembly in an embodiment.

[0089] Based on the preceding reference Figures 1a to 4 The description of the lens assembly 100 of the described embodiment is adaptable to lens assemblies 200, 300, 400, and 500 according to the various other embodiments described below. Some of lens assemblies 200, 300, 400, and 500 may have the same lens characteristics (e.g., field of view, focal length, autofocus, F-number (Fno), or optical zoom), or at least one lens assembly may have one or more lens characteristics different from those included in the other lens assemblies. Lens assemblies 200, 300, 400, and 500 may include a flash, an image sensor (IS), an image stabilizer, a memory, or an image signal processor.

[0090] In describing the various embodiments of this disclosure below, similar reference numerals may be assigned to components that are readily understood from the foregoing embodiments, or no reference numerals may be assigned. Furthermore, detailed descriptions may be omitted to avoid repetition.

[0091] Refer to together Figures 5 to 8 The lens assembly 200 may include four lenses (e.g., L1, L2, L3 and L4), a filter F and an image sensor IS.

[0092] According to Figures 1a to 4 The lens assembly 100 in the embodiment differs from that in the example, where, according to Figures 5 to 8In the lens assembly 200 of the embodiment, the image-side surface S3 of the first lens L1 is recessed towards the image side, and the object-side surface S4 of the second lens L2 is recessed towards the object side. Furthermore, referring to... Figure 5 The lens assembly 200 may have a first inflection point P1 formed on the image-side surface S3 of the first lens L1, a second inflection point P2 formed on the image-side surface S5 of the second lens L2, a third inflection point P3 formed on the object-side surface S6 of the third lens L3, a fourth inflection point P4 formed on the object-side surface S8 of the fourth lens L4, and a fifth inflection point P5 formed on the image-side surface S9 of the fourth lens L4.

[0093] The following [Table 4] lists the individual optical data for the four lenses (e.g., L1, L2, L3, and L4) and / or filters F included in the lens assembly 200. “obj” can represent an object, and “img” can represent the image plane of the image sensor IS. “S1” can represent the aperture stop sto, and “S2 to S11” can represent the surfaces of the associated plurality of lenses (e.g., L1, L2, L3, and L4) and / or filters F. y radius can represent the radius of curvature of the lens, thickness can represent the lens thickness or air gap, Nd can represent the refractive index of the medium (e.g., the lens), and Vd can represent the Abbe number of the lens. When the lens assembly 200 has an F number Fno of about 2.07, a field of view ANG of about 86.6 degrees, a focal length of about 1.22 mm, and ImgH of 1.19 for the image sensor IS, the lens assembly 200 can satisfy the above formula (and / or at least one of the above formulas) while having the optical data listed in the following [Table 4].

[0094] [Table 4]

[0095] The refractive index data in [Table 4] can represent, for example, the refractive index at a wavelength of 587.6000 nm. [Table 5] and [Table 6] below list the aspherical coefficients of the four lenses (e.g., L1, L2, L3, and L4) included in the lens assembly.

[0096] [Table 5]

[0097] [Table 6]

[0098] Figure 6 The longitudinal spherical aberration can be represented for light with wavelengths of approximately 656.3000 nm, approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, and approximately 435.8000 nm, respectively. Figure 7Astigmatism can be represented by the results obtained for light with a wavelength of approximately 587.6000 nm. Figure 8 The distortion can also be represented for light with a wavelength of approximately 587.6000 nm. (See reference...) Figures 6 to 8 It can be determined that the lens assembly 200 has good spherical aberration, astigmatism and distortion characteristics. Figure 9 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure. Figure 10 It shows the basis Figure 9 A graph showing the spherical aberration of the lens assembly in an embodiment. Figure 11 It shows the basis Figure 9 A graph showing the astigmatism of the lens assembly in an embodiment. Figure 12 It shows the basis Figure 9 A graph showing the distortion of the lens assembly in an embodiment.

[0099] Refer to together Figures 9 to 12 The lens assembly 300 may include four lenses (e.g., L1, L2, L3 and L4), a filter F and an image sensor IS.

[0100] Similar to according to Figures 1a to 4 The lens assembly 100 of the foregoing embodiment, as an example, is based on... Figures 9 to 12 In the lens assembly 300 of the embodiment, the image-side surface S3 of the first lens L1 protrudes towards the image side, and the object-side surface S4 of the second lens L2 protrudes towards the object side. However, referring to... Figure 9 The lens assembly 300 may have a first inflection point P1 formed on the object surface S2 of the first lens L1, a second inflection point P2 formed on the object surface S4 of the second lens L2, a third inflection point P3 formed on the image surface S5 of the second lens L2, a fourth inflection point P4 formed on the object surface S6 of the third lens L3, a fifth inflection point P5 formed on the image surface S7 of the third lens L3, a sixth inflection point P6 formed on the object surface S8 of the fourth lens L4, and a seventh inflection point P7 formed on the image surface S9 of the fourth lens L4.

[0101] The following [Table 7] lists the individual optical data for the four lenses (e.g., L1, L2, L3, and L4) and / or filters F included in the lens assembly 300. “obj” can represent an object, and “img” can represent the image plane of the image sensor IS. “S1” can represent the aperture stop sto, and “S2 to S11” can represent the surfaces of the associated plurality of lenses (e.g., L1, L2, L3, and L4) and / or filters F. y radius can represent the radius of curvature of the lens, thickness can represent the lens thickness or air gap, Nd can represent the refractive index of the medium (e.g., the lens), and Vd can represent the Abbe number of the lens. When the lens assembly 300 has an F number Fno of about 2.47, a field of view ANG of about 99.58 degrees, a focal length of about 1.0 mm, and ImgH of 1.19 for the image sensor IS, the lens assembly 300 can satisfy the above formula (and / or at least one of the above formulas) while having the optical data listed in the following [Table 7].

[0102] [Table 7]

[0103] The refractive index data in [Table 7] can represent, for example, the refractive index at a wavelength of 587.6000 nm. [Table 8] and [Table 9] below list the aspherical coefficients of the four lenses (e.g., L1, L2, L3, and L4) included in the lens assembly 300.

[0104] [Table 8]

[0105] [Table 9]

[0106] Figure 10 The longitudinal spherical aberration can be represented, for example, for light with wavelengths of approximately 656.3000 nm, approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, and approximately 435.8000 nm. Figure 11 Astigmatism can be represented by the results obtained for light with a wavelength of approximately 587.6000 nm. Figure 12 The distortion can also be represented for light with a wavelength of approximately 587.6000 nm. (See reference...) Figures 10 to 12 It can be determined that the lens assembly 300 has good spherical aberration, astigmatism and distortion characteristics. Figure 13 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure. Figure 14 It shows the basis Figure 13 A graph showing the spherical aberration of the lens assembly in an embodiment. Figure 15 It shows the basis Figure 13 A graph showing the astigmatism of the lens assembly in an embodiment. Figure 16 It shows the basis Figure 13 A graph showing the distortion of the lens assembly in an embodiment.

[0107] Refer to together Figures 13 to 16 The lens assembly 400 may include four lenses (e.g., L1, L2, L3 and L4), a filter F and an image sensor IS.

[0108] Similar to according to Figures 1a to 4 The lens assembly 100 of the foregoing embodiment, as an example, is based on... Figures 13 to 16 In the lens assembly 400 of the embodiment, the image-side surface S2 of the first lens L1 protrudes towards the image side, and the object-side surface S4 of the second lens L2 protrudes towards the object side. However, referring to... Figure 13 The lens assembly 400 may include an aperture stop S3 disposed between the first lens L1 and the second lens L2, and has a first inflection point P1 formed on the object surface S1 of the first lens L1, a second inflection point P2 formed on the object surface S4 of the second lens L2, a third inflection point P3 formed on the image surface S5 of the second lens L2, a fourth inflection point P4 formed on the object surface S6 of the third lens L3, a fifth inflection point P5 formed on the image surface S7 of the third lens L3, a sixth inflection point P6 formed on the object surface S8 of the fourth lens L4, and a seventh inflection point P7 formed on the image surface S9 of the fourth lens L4.

[0109] Table 10 below lists the individual optical data for the four lenses (e.g., L1, L2, L3, and L4) and / or filters F included in the lens assembly 400. “obj” may represent an object, and “img” may represent the image plane of the image sensor IS. “S1 and S2, and S4 through S11” may represent the surfaces of the associated plurality of lenses (e.g., L1, L2, L3, and L4) and / or filters F. S3 may represent the aperture stop. The y-radius may represent the radius of curvature of the lens, the thickness may represent the lens thickness or air gap, Nd may represent the refractive index of the medium (e.g., the lens), and Vd may represent the Abbe number of the lens. When the lens assembly 400 has an F-number of about 2.48, a field of view of about 99.56 degrees, a focal length of about 0.99 mm, and an ImgH of 1.19 for the image sensor IS, the lens assembly 400 can satisfy the above formula (and / or at least one of the above formulas) while having the optical data listed in [Table 10] below.

[0110] [Table 10]

[0111] The refractive index data in [Table 10] can represent, for example, the refractive index at a wavelength of 587.6000 nm. The [Table 11] and [Table 12] below list the aspherical coefficients of the four lenses (e.g., L1, L2, L3, and L4) included in the lens assembly 400.

[0112] [Table 11]

[0113] [Table 12]

[0114] Figure 14 The longitudinal spherical aberration can be represented, for example, for light with wavelengths of approximately 656.3000 nm, approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, and approximately 435.8000 nm. Figure 15 Astigmatism can be represented by the results obtained for light with a wavelength of approximately 587.6000 nm. Figure 16 The distortion can also be represented for light with a wavelength of approximately 587.6000 nm. (See reference...) Figures 14 to 16 It can be determined that the lens assembly 400 has good spherical aberration, astigmatism and distortion characteristics. Figure 17 This is a structural diagram illustrating a lens assembly according to an embodiment of the present disclosure. Figure 18 It shows the basis Figure 17 A graph showing the spherical aberration of the lens assembly in an embodiment. Figure 19 It shows the basis Figure 17 A graph showing the astigmatism of the lens assembly in an embodiment. Figure 20 It shows the basis Figure 17 A graph showing the distortion of the lens assembly in an embodiment.

[0115] Refer to together Figures 17 to 20 The lens assembly 500 may include four lenses (e.g., L1, L2, L3 and L4), a filter F and an image sensor IS.

[0116] Similar to the aforementioned Figures 1a to 4 The lens assembly 100 of the embodiment, as an example, is based on... Figures 17 to 20 In the lens assembly 500 of the embodiment, the image-side surface S3 of the first lens L1 protrudes towards the image side, and the object-side surface S4 of the second lens L2 protrudes towards the object side. However, referring to... Figure 17The lens assembly 500 may have a first inflection point P1 formed on the object surface S2 of the first lens L1, a second inflection point P2 formed on the object surface S4 of the second lens L2, a third inflection point P3 formed on the image surface S5 of the second lens L2, a fourth inflection point P4 formed on the object surface S6 of the third lens L3, a fifth inflection point P5 formed on the object surface S8 of the fourth lens L4, and a sixth inflection point P6 formed on the image surface S9 of the fourth lens L4.

[0117] The following [Table 13] lists the individual optical data for the four lenses (e.g., L1, L2, L3, and L4) and / or filters F included in the lens assembly 500. “obj” can represent an object, and “img” can represent the image plane of the image sensor IS. “S1” can represent the aperture stop sto, and “S2 to S11” can represent the surfaces of the associated plurality of lenses (e.g., L1, L2, L3, and L4) and / or filters F. y radius can represent the radius of curvature of the lens, thickness can represent the lens thickness or air gap, Nd can represent the refractive index of the medium (e.g., the lens), and Vd can represent the Abbe number of the lens. When the lens assembly 500 has an F number Fno of about 2.28, a field of view ANG of about 99.6 degrees, a focal length of about 0.99 mm, and ImgH of 1.19 for the image sensor IS, the lens assembly 500 can satisfy the above formula (and / or at least one of the above formulas) while having the optical data listed in the following [Table 13].

[0118] [Table 13]

[0119] The refractive index data in [Table 13] can represent, for example, the refractive index at a wavelength of 587.6000 nm. The following [Table 14] and [Table 15] list the aspherical coefficients of the four lenses (e.g., L1, L2, L3, and L4) included in the lens assembly 500.

[0120] [Table 14]

[0121] [Table 15]

[0122] Figure 18 The longitudinal spherical aberration can be represented, for example, for light with wavelengths of approximately 656.3000 nanometers (nm), approximately 587.6000 nm, approximately 546.1000 nm, approximately 486.1000 nm, and approximately 435.8000 nm, respectively. Figure 19 Astigmatism can be represented by the results obtained for light with a wavelength of approximately 587.6000 nm. Figure 20The distortion can also be represented for light with a wavelength of approximately 587.6000 nm. (See reference...) Figures 18 to 20 It can be determined that the lens assembly 500 has good spherical aberration, astigmatism, and distortion characteristics. In the above embodiments, various data of the lens and surrounding components can be determined in the lens assembly (e.g., 100, 200, 300, 400, and 500) and the electronic device including the lens assembly. These data can satisfy the above conditions, for example, the results of [Equations 1 to 6] as shown in [Table 16].

[0123] [Table 16]

[0124] In Table 16 above, "Example 1" may refer to Figure 1a The lens assembly 100 shown, "Embodiment 2" may refer to Figure 5 The lens assembly 200 shown in "Example 3" may refer to Figure 9 The lens assembly 300 shown in "Example 4" may refer to Figure 13 The lens assembly 400 shown in "Example 5" may refer to Figure 17 The lens assembly 500 is shown. Lens assemblies 100, 200, 300, 400, and 500 according to the various embodiments described above can be installed and used in electronic devices (e.g., laptop computers). Lens assemblies 100, 200, 300, 400, and 500 can be assembled with an image sensor IS into a single module (e.g., a camera module), and in the state of being assembled into a camera module, lens assemblies 100, 200, 300, 400, and 500 can be mounted in the frame of the electronic device. In addition to the image sensor IS, the electronic device (e.g., a laptop computer) may also include an application processor (AP). Through the AP, for example, an operating system or application can be driven to control multiple hardware or software components connected to the AP, and various data processing and calculations can be performed. For example, the AP may also include a graphics processing unit (GPU) and / or an image signal processor. When an image signal processor is included in the AP, the AP can be used to store or output images (or videos) acquired by the image sensor IS.

[0125] Figure 21 This is a block diagram illustrating an electronic device 2101 (e.g., an optical device) in a network environment 2100 according to various embodiments. (Refer to...) Figure 21In network environment 2100, electronic device 2101 (e.g., optical device) can communicate with electronic device 2102 via a first network 2198 (e.g., a short-range wireless communication network), or with at least one of electronic device 2104 or server 2108 via a second network 2199 (e.g., a long-range wireless communication network). According to an embodiment, electronic device 2101 can communicate with electronic device 2104 via server 2108. According to an embodiment, electronic device 2101 may include a processor 2120, a memory 2130, an input module 2150, a sound output module 2155, a display module 2160, an audio module 2170, a sensor module 2176, an interface 2177, a connection terminal 2178, a haptic module 2179, a camera module 2180, a power management module 2188, a battery 2189, a communication module 2190, a subscriber identification module (SIM) 2196, or an antenna module 2197. In some embodiments, at least one of the above-described components (e.g., connection terminal 2178) may be omitted from electronic device 2101, or one or more other components may be added to electronic device 2101. In some embodiments, some of the above-described components (e.g., sensor module 2176, camera module 2180, or antenna module 2197) may be implemented as a single component (e.g., display module 2160).

[0126] Processor 2120 may run software (e.g., program 2140) to control at least one other component (e.g., hardware or software component) of electronic device 2101 in conjunction with processor 2120, and may perform various data processing or calculations. According to embodiments, as at least part of the data processing or calculations, processor 2120 may store commands or data received from another component (e.g., sensor module 2176 or communication module 2190) in volatile memory 2132, process the commands or data stored in volatile memory 2132, and store the resulting data in non-volatile memory 2134. According to embodiments, processor 2120 may include a main processor 2121 (e.g., central processing unit (CPU) or application processor (AP)) or a coprocessor 2123 (e.g., graphics processing unit (GPU), neural processing unit (NPU), image signal processor (ISP), sensor central processor, or communication processor (CP)) that is operationally independent of or combined with the main processor 2121. For example, when electronic device 2101 includes a main processor 2121 and a coprocessor 2123, the coprocessor 2123 may be adapted to consume less power than the main processor 2121, or adapted to be dedicated to a specific function. The coprocessor 2123 may be implemented separately from the main processor 2121, or may be implemented as part of the main processor 2121.

[0127] When the main processor 2121 is inactive (e.g., in sleep) state, the coprocessor 2123 (rather than the main processor 2121) can control at least some of the functions or states associated with at least one component of the electronic device 2101 (e.g., display module 2160, sensor module 2176, or communication module 2190), or when the main processor 2121 is active (e.g., running an application), the coprocessor 2123 can work with the main processor 2121 to control at least some of the functions or states associated with at least one component of the electronic device 2101 (e.g., display module 2160, sensor module 2176, or communication module 2190). According to embodiments, the coprocessor 2123 (e.g., an image signal processor or a communication processor) can be implemented as part of another component (e.g., camera module 2180 or communication module 2190) functionally associated with the coprocessor 2123. According to embodiments, the coprocessor 2123 (e.g., a neural processing unit) can include hardware architectures dedicated to artificial intelligence model processing. Artificial intelligence models can be generated through machine learning. For example, such learning can be performed via electronic device 2101 through which the artificial intelligence model is executed, or via a separate server (e.g., server 2108). Learning algorithms may include, but are not limited to, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning. The artificial intelligence model may include multiple layers of artificial neural networks. The artificial neural networks may be, but are not limited to, deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted Boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), deep Q-networks, or combinations of two or more of these. Additionally or optionally, the artificial intelligence model may include software structures in addition to hardware structures.

[0128] Memory 2130 may store various data used by at least one component of electronic device 2101 (e.g., processor 2120 or sensor module 2176). The various data may include, for example, software (e.g., program 2140) and input or output data for commands associated with it. Memory 2130 may include volatile memory 2132 or non-volatile memory 2134.

[0129] The program 2140 may be stored as software in the memory 2130, and the program 2140 may include, for example, an operating system (OS) 2142, middleware 2144, or application 2146.

[0130] Input module 2150 can receive commands or data from outside electronic device 2101 (e.g., a user) that will be used by other components of electronic device 2101 (e.g., processor 2120). Input module 2150 may include, for example, a microphone, mouse, keyboard, keys (e.g., buttons), or digital pen (e.g., stylus).

[0131] The sound output module 2155 can output sound signals to the outside of the electronic device 2101. The sound output module 2155 may include, for example, a speaker or a receiver. The speaker can be used for general purposes such as playing multimedia or playing records. The receiver can be used to receive incoming calls. According to embodiments, the receiver can be implemented separately from the speaker or as part of the speaker.

[0132] Display module 2160 can visually provide information to the outside of electronic device 2101 (e.g., to a user). Display module 2160 may include, for example, a display, a holographic device, or a projector, and control circuitry for controlling a respective one of the display, holographic device, and projector. According to an embodiment, display module 2160 may include a touch sensor adapted to detect touch or a pressure sensor adapted to measure the intensity of the force caused by touch.

[0133] The audio module 2170 can convert sound into electrical signals and vice versa. According to an embodiment, the audio module 2170 can obtain sound via the input module 2150, or output sound via the sound output module 2155 or via headphones of an external electronic device (e.g., electronic device 2102) that is directly (e.g., wired) or wirelessly connected to the electronic device 2101.

[0134] Sensor module 2176 can detect the operating state of electronic device 2101 (e.g., power or temperature) or the environmental state outside electronic device 2101 (e.g., user state), and then generate an electrical signal or data value corresponding to the detected state. According to embodiments, sensor module 2176 may include, for example, a gesture sensor, gyroscope sensor, atmospheric pressure sensor, magnetic sensor, accelerometer, grip sensor, proximity sensor, color sensor, infrared (IR) sensor, biometric sensor, temperature sensor, humidity sensor, or illuminance sensor.

[0135] Interface 2177 may support one or more specific protocols used to enable electronic device 2101 to be directly (e.g., wired) or wirelessly coupled to external electronic device (e.g., electronic device 2102). According to embodiments, interface 2177 may include, for example, a High Definition Multimedia Interface (HDMI), a Universal Serial Bus (USB) interface, a Secure Digital Card (SD) interface, or an audio interface.

[0136] Connection terminal 2178 may include a connector, through which electronic device 2101 can be physically connected to an external electronic device (e.g., electronic device 2102). According to embodiments, connection terminal 2178 may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0137] The haptic module 2179 can convert electrical signals into mechanical stimuli (e.g., vibration or motion) or electrical stimuli that can be recognized by a user through his touch or kinesthesia. According to embodiments, the haptic module 2179 may include, for example, a motor, a piezoelectric element, or an electrical stimulator.

[0138] Camera module 2180 can capture still or moving images. According to an embodiment, camera module 2180 may include one or more lenses, an image sensor, an image signal processor, or a flash.

[0139] The power management module 2188 manages the power supply to the electronic device 2101. According to an embodiment, the power management module 2188 may be implemented as at least part of, for example, a power management integrated circuit (PMIC).

[0140] Battery 2189 can power at least one component of electronic device 2101. According to embodiments, battery 2189 may include, for example, a non-rechargeable primary battery, a rechargeable rechargeable battery, or a fuel cell.

[0141] Communication module 2190 can support the establishment of a direct (e.g., wired) or wireless communication channel between electronic device 2101 and external electronic devices (e.g., electronic device 2102, electronic device 2104, or server 2108), and perform communication via the established communication channel. Communication module 2190 may include one or more communication processors capable of operating independently of processor 2120 (e.g., application processor) and supporting direct (e.g., wired) or wireless communication. According to embodiments, communication module 2190 may include wireless communication module 2192 (e.g., cellular communication module, short-range wireless communication module, or Global Navigation Satellite System (GNSS) communication module) or wired communication module 2194 (e.g., local area network (LAN) communication module or power line communication (PLC) module). One of these communication modules can communicate with an external electronic device via a first network 2198 (e.g., a short-range communication network such as Bluetooth, Wi-Fi Direct, or Infrared Data Association (IrDA)) or a second network 2199 (e.g., a long-range communication network such as a traditional cellular network, 5G network, next-generation communication network, the Internet, or a computer network (e.g., a LAN or a wide area network (WAN))). These various types of communication modules can be implemented as a single component (e.g., a single chip) or as multiple components separate from each other (e.g., multiple chips). The wireless communication module 2192 can use user information (e.g., an International Mobile Subscriber Identity (IMSI)) stored in the user identification module 2196 to identify and verify the electronic device 2101 in the communication network (such as the first network 2198 or the second network 2199).

[0142] Wireless communication module 2192 can support 5G networks following 4G networks and next-generation communication technologies (such as new radio (NR) access technologies). NR access technologies can support enhanced mobile broadband (eMBB), massive machine-type communication (mMTC), or ultra-reliable low-latency communication (URLLC). Wireless communication module 2192 can support high-frequency bands (e.g., millimeter-wave bands) to achieve, for example, high data transmission rates. Wireless communication module 2192 can support various technologies used to ensure performance in high-frequency bands, such as, for example, beamforming, massive MIMO, full-dimensional MIMO (FD-MIMO), array antennas, analog beamforming, or massive antennas. Wireless communication module 2192 can support various requirements specified in electronic device 2101, external electronic device (e.g., electronic device 2104), or network system (e.g., second network 2199). According to an embodiment, the wireless communication module 2192 may support peak data rates (e.g., 20 Gbps or greater) for implementing eMBB, lost coverage (e.g., 164 dB or less) for implementing mMTC, or U-plane latency (e.g., 0.5 ms or less for each of the downlink (DL) and uplink (UL), or 1 ms or less round trip) for implementing URLLC.

[0143] Antenna module 2197 can transmit or receive signals or power to or from the exterior of electronic device 2101 (e.g., external electronic device). According to an embodiment, antenna module 2197 may include an antenna comprising a radiating element formed of a conductive material or conductive pattern formed in or on a substrate (e.g., a printed circuit board (PCB)). According to an embodiment, antenna module 2197 may include multiple antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication scheme used in a communication network (such as a first network 2198 or a second network 2199) can be selected from the multiple antennas by, for example, communication module 2190 (e.g., wireless communication module 2192). Signals or power can then be transmitted or received between communication module 2190 and the external electronic device via the selected at least one antenna. According to an embodiment, additional components besides the radiating element (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of antenna module 2197.

[0144] According to an embodiment, antenna module 2197 can form a millimeter-wave antenna module. According to an embodiment, the millimeter-wave antenna module may include a printed circuit board, an RFIC, and multiple antennas (e.g., an array antenna), wherein the RFIC is disposed on a first surface (e.g., the bottom surface) of the printed circuit board, or adjacent to the first surface and capable of supporting a specified high-frequency band (e.g., a millimeter-wave band), and the multiple antennas are disposed on a second surface (e.g., the top surface or a side surface) of the printed circuit board, or adjacent to the second surface and capable of transmitting or receiving signals in the specified high-frequency band.

[0145] At least some of the aforementioned components can be interconnected and communicate signals (e.g., commands or data) between them via an inter-peripheral communication scheme (e.g., bus, general purpose input / output (GPIO), serial peripheral interface (SPI), or mobile industrial processor interface (MIPI)).

[0146] According to an embodiment, commands or data can be sent or received between electronic device 2101 and external electronic device 2104 via server 2108 connected to a second network 2199. Each of electronic device 2102 or electronic device 2104 can be a device of the same type as electronic device 2101, or a device of a different type. According to an embodiment, all or some operations that would run in electronic device 2101 can run in one or more of external electronic devices 2102, 2104, or 2108. For example, if electronic device 2101 is required to automatically perform a function or service, or is required to perform a function or service in response to a request from a user or another device, electronic device 2101 may request the one or more external electronic devices to perform at least a portion of the function or service instead of running the function or service, or electronic device 2101 may request the one or more external electronic devices to perform at least a portion of the function or service in addition to running the function or service. Upon receiving the request, the one or more external electronic devices may perform at least a portion of the requested function or service, or perform additional functions or services related to the request, and transmit the result of the execution to electronic device 2101. Electronic device 2101 may provide the result as at least a partial response to the request, with or without further processing of the result. For this purpose, technologies such as cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing may be used.

[0147] Electronic device 2101 can use, for example, distributed computing or mobile edge computing to provide ultra-low latency services. In another embodiment, external electronic device 2104 may include an Internet of Things (IoT) device. Server 2108 may be an intelligent server using machine learning and / or neural networks. According to embodiments, external electronic device 2104 or server 2108 may be included in a second network 2199. Electronic device 2101 can be applied to intelligent services (e.g., smart homes, smart cities, smart cars, or healthcare) based on 5G communication technology or IoT-related technologies.

[0148] Figure 22 This is a block diagram 2200 illustrating a camera module 2280 according to various embodiments. (Refer to...) Figure 22 The camera module 2280 may include a lens assembly 2210 (e.g., Figure 1a Lens assembly 100 Figure 5 Lens assembly 200, Figure 9 Lens assembly 300, Figure 13 Lens assembly 400 or Figure 17 Lens assembly 500), flash 2220, image sensor 2230 (e.g., Figure 1a , Figure 6 and Figure 10 Image sensor 2240, image stabilizer 2250, and memory 2250 (e.g., buffer memory). Figure 21 The memory 2130 or image signal processor 2260. The lens assembly 2210 can capture light emitted or reflected from an object whose image is to be captured. The lens assembly 2210 may include one or more lenses. According to an embodiment, the camera module 2280 may include multiple lens assemblies 2210. In this case, the camera module 2280 may form, for example, a dual-camera, a 360-degree camera, or a spherical camera. Some of the multiple lens assemblies 2210 may have the same lens properties (e.g., angle of view, focal length, autofocus, F-number (Fno), or optical zoom), or at least one lens assembly may have one or more lens properties that are different from the lens properties of the other lens assemblies. The lens assembly 2210 may include, for example, a wide-angle lens or a telephoto lens.

[0149] Flash 2220 emits light to enhance light reflected from an object. According to embodiments, flash 2220 may include one or more light-emitting diodes (LEDs) (e.g., red-green-blue (RGB) LEDs, white LEDs, infrared LEDs, or ultraviolet (UV) LEDs) or xenon lamps. Image sensor 2230 acquires an image corresponding to an object by converting light emitted or reflected from the object and transmitted through lens assembly 2210 into an electrical signal. According to embodiments, image sensor 2230 may include, for example, one image sensor selected from image sensors with different properties (such as an RGB sensor, a black-and-white (BW) sensor, an infrared sensor, or an ultraviolet sensor), multiple image sensors having the same properties, or multiple image sensors with different properties. Each image sensor included in image sensor 2230 may be implemented using, for example, a charge-coupled device (CCD) sensor or a complementary metal-oxide-semiconductor (CMOS) sensor.

[0150] Image stabilizer 2240 may, in response to movement of camera module 2280 or electronics 2101 including camera module 2280, move image sensor 2230 or at least one lens included in lens assembly 2210 in a specific direction, or control operable properties of image sensor 2230 (e.g., adjust readout timing). This can compensate for at least a portion of the negative impact (e.g., image blur) on the image being captured due to such movement. According to embodiments, image stabilizer 2240 may use a gyroscope sensor (not shown) or accelerometer sensor (not shown) disposed inside or outside camera module 2280 to sense such movement of camera module 2280 or electronics 2101. According to embodiments, image stabilizer 2240 may be implemented as, for example, an optical image stabilizer. Memory 2250 may at least temporarily store at least a portion of the image acquired via image sensor 2230 for subsequent image processing tasks. For example, if image capture is delayed due to shutter lag or multiple images are captured quickly, the acquired original image (e.g., a Bayer pattern image, a high-resolution image) can be stored in memory 2250, and its corresponding copy image (e.g., a low-resolution image) can be previewed via display module 2160. Then, if specified conditions are met (e.g., by user input or system command), at least a portion of the original image stored in memory 2250 can be acquired and processed by, for example, image signal processor 2260. According to embodiments, memory 2250 can be configured as at least a portion of memory 2130, or memory 2250 can be configured as a separate memory operating independently of memory 2130.

[0151] Image signal processor 2260 can perform one or more image processing operations on an image acquired via image sensor 2230 or an image stored in memory 2250. The one or more image processing operations may include, for example, depth map generation, 3D modeling, panorama generation, feature point extraction, image compositing, or image compensation (e.g., noise reduction, resolution adjustment, brightness adjustment, blurring, sharpening, or softening). Additionally or optionally, image signal processor 2260 can perform control (e.g., exposure time control or readout timing control) on at least one component included in camera module 2280 (e.g., image sensor 2230). The image processed by image signal processor 2260 may be stored back in memory 2250 for further processing, or the image may be provided to external components outside camera module 2280 (e.g., memory 2130, display module 2160, electronic device 2102, electronic device 2104, or server 2108). According to an embodiment, the image signal processor 2260 may be configured as at least a part of the processor 2120, or the image signal processor 2260 may be configured as a separate processor operating independently of the processor 2120. If the image signal processor 2260 is configured as a separate processor independent of the processor 2120, at least one image processed by the image signal processor 2260 may be displayed as is by the processor 2120 via the display module 2160, or the at least one image may be displayed after further processing.

[0152] According to an embodiment, the electronic device 2101 may include a plurality of camera modules 2280 with different attributes or functions. In this case, at least one of the plurality of camera modules 2280 may form, for example, a wide-angle camera, and at least another of the plurality of camera modules 2280 may form a telephoto camera. Similarly, at least one of the plurality of camera modules 2280 may form, for example, a front-facing camera, and at least another of the plurality of camera modules 2280 may form a rear-facing camera.

[0153] The electronic devices according to the various embodiments of this disclosure can be one of a variety of types of electronic devices. Electronic devices may include, for example, portable communication devices (e.g., smartphones), computer devices, portable multimedia devices, portable medical devices, cameras, wearable devices, or home appliances. According to embodiments of this disclosure, the electronic devices are not limited to those described above.

[0154] It should be understood that the various embodiments of this disclosure and the terminology used therein are not intended to limit the technical features set forth herein to the specific embodiments, but rather to include various changes, equivalents, or substitutions for the respective embodiments. In the description of the drawings, similar reference numerals may be used to refer to similar or related components. It will be understood that, unless the relevant context clearly indicates otherwise, the singular form of the noun corresponding to an item may include one or more things. As used herein, each of the phrases such as “A or B,” “at least one of A and B,” “at least one of A or B,” “A, B, or C,” “at least one of A, B, and C,” and “at least one of A, B, or C” may include any one or all possible combinations of the items listed together in the corresponding phrase among the plurality of phrases. As used herein, terms such as “first” and “second” or “first” and “second” may be used only to distinguish the respective component from another component and do not limit the component in other respects (e.g., importance or order). It will be understood that if, when the terms “operational location” or “communication location” are used, or when the terms “operational location” or “communication location” are not used, an element (e.g., a first element) is referred to as “combined with another element (e.g., a second element),” “combined to another element (e.g., a second element),” “connected to another element (e.g., a second element),” or “attached to another element (e.g., a second element),” it means that the first element can be directly (e.g., wiredly) combined with the second element, wirelessly combined with the second element, or combined with the second element via a third element.

[0155] As used in conjunction with various embodiments of this disclosure, the term "module" may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with other terms (e.g., "logic," "logic block," "component," or "circuit"). A module may be a single integrated component adapted to perform one or more functions, or the smallest unit or portion of such a single integrated component. For example, according to embodiments, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0156] The various embodiments set forth herein can be implemented as software (e.g., program 2140) including one or more instructions readable by a machine (e.g., electronic device 2101) stored in a storage medium (e.g., internal memory 2136 or external memory 2138). For example, a processor (e.g., processor 2120) of the machine (e.g., electronic device 2101) can invoke and execute at least one of the one or more instructions stored in the storage medium. This enables the machine to be operated to perform at least one function according to the invoked at least one instruction. The one or more instructions may include code generated by a compiler or code executable by an interpreter. Machine-readable storage media can be provided in the form of non-transitory storage media. Here, the term "non-transitory" means only that the storage medium is a tangible device and does not include signals (e.g., electromagnetic waves), but this term does not distinguish between data being stored semi-permanently in the storage medium and data being temporarily stored in the storage medium.

[0157] According to embodiments, methods according to various embodiments of this disclosure may be included and provided in a computer program product. The computer program product can be traded as a product between a seller and a buyer. The computer program product may be distributed in the form of a machine-readable storage medium (e.g., a compact disc read-only memory (CD-ROM)) or via an app store (e.g., the Play Store). TM The computer program product may be distributed online (e.g., downloaded or uploaded), or may be distributed (e.g., downloaded or uploaded) directly between two user devices (e.g., smartphones). If it is distributed online, at least a portion of the computer program product may be temporarily generated, or at least a portion of the computer program product may be temporarily stored in a machine-readable storage medium (such as the memory of a manufacturer's server, an app store's server, or a relay server).

[0158] According to various embodiments, each of the above components (e.g., a module or program) may include a single entity or multiple entities, and some of the multiple entities may be separately located in different components. According to various embodiments, one or more of the above components may be omitted, or one or more other components may be added. Optionally or additionally, multiple components (e.g., modules or programs) may be integrated into a single component. In such a case, according to various embodiments, the integrated component may still perform the one or more functions of each of the multiple components in the same or similar manner as the corresponding component of the multiple components performed one or more functions prior to integration. According to various embodiments, the operations performed by a module, program, or other component may be performed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations may be run in a different order or omitted, or one or more other operations may be added.

[0159] According to embodiments of this disclosure, an electronic device 2101 may be provided. The electronic device 2101 may include: a lens assembly 100, 200, 300, 400, or 500, including a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 disposed along the optical axis from the object side to the image side; and an image sensor IS configured to receive light focused or guided by the lens assembly. The first lens L1 may have positive refractive power, the second lens L2 may have negative refractive power, the third lens L3 may have positive refractive power, and at least one of the object-side or image-side surfaces of the second lens L2 may have an inflection point. The electronic device may satisfy the following [Equation 1] and [Equation 2].

[0160] [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 (Where, “OAL” is the distance from the object surface of the first lens to the image plane, HFoV is the half field of view of the optical system including the lens assembly, and FoV is the field of view of the optical system including the lens assembly).

[0161] According to an embodiment, the electronic device may satisfy the following [Equation 3].

[0162] [Formula 3] 32≤Vd1-Vd2≤39 (Where, “Vd1” is the Abbe number of the first lens and “Vd2” is the Abbe number of the second lens).

[0163] According to an embodiment, the image-side surface of the second lens has a recurved shape in which its central portion adjacent to the optical axis is concave towards the image side and its edge portion is convex towards the image side.

[0164] According to an embodiment, the object-side surface of the second lens may protrude towards the object side.

[0165] According to an embodiment, the object-side surface of the first lens may bulge towards the object side, and the image-side surface of the first lens may bulge or be recessed towards the image side.

[0166] According to an embodiment, the third lens has a meniscus shape with the object surface and the image surface convex toward the image side.

[0167] According to an embodiment, the aperture stop may be positioned adjacent to the object-side surface or image-side surface of the first lens.

[0168] According to an embodiment, the electronic device may satisfy the following [Equation 4].

[0169] [Formula 4] 1.5≤nd3≤1.65 (Where, "nd3" is the d-line refractive index of the third lens).

[0170] According to an embodiment, the electronic device may satisfy the following [Equation 5].

[0171] [Formula 5] 0.6 ≤ f3 / f1 ≤ 4.5 (Where, "f1" is the focal length of the first lens and "f2" is the focal length of the third lens).

[0172] According to an embodiment, the fourth lens has a meniscus shape with the object-side surface and the image-side surface convex toward the object-side.

[0173] According to an embodiment, each of the object-side surface and the image-side surface of the fourth lens may have an inverted shape in which the radius of curvature of the central portion adjacent to the optical axis and the radius of curvature of the edge portion have opposite signs.

[0174] According to an embodiment, the electronic device may satisfy the following [Equation 6].

[0175] [Formula 6] 1.3 ≤ OAL / IH ≤ 1.6 (Where, “OAL” is the distance from the object surface of the first lens to the image plane, and “IH” is the maximum height of the image plane).

[0176] According to an embodiment, the electronic device may be a laptop computer.

[0177] According to an embodiment, the first lens, the second lens, the third lens, and the fourth lens can be made using plastic aspherical lenses.

[0178] According to an embodiment, the distance from the object surface of the first lens to the image plane can be less than or equal to about 1.8 mm.

[0179] According to embodiments of this disclosure, an electronic device 2101 may be provided. The electronic device 2101 may include a display, a bezel structure surrounding at least a portion of the display, and a camera module disposed within the bezel structure. The camera module may include: a lens assembly 100, 200, 300, 400, or 500, including a first lens L1, a second lens L2, a third lens L3, and a fourth lens L4 disposed along the optical axis from the object side to the image side; and an image sensor IS configured to receive light focused or guided by the lens assembly. The first lens L1 may have positive refractive power, the second lens L2 may have negative refractive power, the third lens L3 may have positive refractive power, at least one of the object-side or image-side surfaces of the second lens L2 may have an inflection point, the image-side surface of the second lens may have a recurved shape with a central portion concave and an edge portion convex adjacent to the optical axis, the third lens may have a meniscus shape with both the object-side and image-side surfaces convex towards the image side, and the fourth lens may have a meniscus shape with both the object-side and image-side surfaces convex towards the object side. The electronic device can satisfy the following [Equation 1] and [Equation 2].

[0180] [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 (Where, “OAL” is the distance from the object surface of the first lens to the image plane, HFoV is the half field of view of the optical system including the lens assembly, and FoV is the field of view of the optical system including the lens assembly).

[0181] According to an embodiment, the electronic device may satisfy the following [Equation 3].

[0182] [Formula 3] 32≤Vd1-Vd2≤39 (Where, “Vd1” is the Abbe number of the first lens and “Vd2” is the Abbe number of the second lens).

[0183] According to an embodiment, the electronic device may satisfy the following [Equation 4].

[0184] [Formula 4] 1.5≤nd3≤1.65 (Where, "nd3" is the d-line refractive index of the third lens).

[0185] According to an embodiment, the electronic device may satisfy the following [Equation 5].

[0186] [Formula 5] 0.6 ≤ f3 / f1 ≤ 4.5 (Where f1 is the focal length of the first lens and f2 is the focal length of the third lens).

[0187] According to an embodiment, the electronic device may satisfy the following [Equation 6].

[0188] [Formula 6] 1.3 ≤ OAL / IH ≤ 1.6 (Where, “OAL” is the distance from the object surface of the first lens to the image plane, and “IH” is the maximum height of the image plane).

[0189] While specific embodiments have been described in detail in the various embodiments of this disclosure, it will be readily understood by those skilled in the art that various modifications may be made without departing from the scope of this disclosure. For example, the gap, width, and dimensions of all or each of the four lenses in this disclosure may be appropriately set according to the structure and required specifications of the lens assembly to be manufactured, or the camera and / or electronic device on which the lens assembly will be mounted, and the actual usage environment.

[0190] The effects that can be obtained in this disclosure are not limited to those described above, and other effects not mentioned will be clearly understood by those skilled in the art.

Claims

1. An electronic device (2101), comprising: Lens assemblies (100, 200, 300, 400, 500) include a first lens (L1), a second lens (L2), a third lens (L3), and a fourth lens (L4) arranged along the optical axis from the object side to the image side; and An image sensor (IS) is configured to receive light focused or directed by the lens assembly. The first lens (L1) has positive refractive power, the second lens (L2) has negative refractive power, and the third lens (L3) has positive refractive power. Wherein, at least one of the object-side surface or the image-side surface of the second lens (L2) has an inflection point, and The electronic device satisfies the following [Equation 1] and [Equation 2], [Formula 1] 0.03≤OAL / HFoV≤0.045 [Equation 2] 80≤FoV≤110 Wherein, "OAL" is the distance from the object surface of the first lens to the image plane, HFoV is the half field of view of the optical system including the lens assembly, and FoV is the field of view of the optical system including the lens assembly.

2. The electronic device according to claim 1, wherein, The electronic device satisfies the following [Equation 3], [Formula 3] 32≤Vd1-Vd2≤39 Wherein, "Vd1" is the Abbe number of the first lens, and "Vd2" is the Abbe number of the second lens.

3. The electronic device according to claim 1 or 2, wherein, The image-side surface of the second lens has a recurved shape, wherein the central portion of the image-side surface of the second lens adjacent to the optical axis is recessed toward the image side and the edge portion of the image-side surface of the second lens protrudes toward the image side.

4. The electronic device according to claim 3, wherein, The object-side surface of the second lens protrudes towards the object side.

5. The electronic device according to any one of claims 1 to 4, wherein, The object-side surface of the first lens protrudes towards the object side, and the image-side surface of the first lens either protrudes or is recessed towards the image side.

6. The electronic device according to any one of claims 1 to 5, wherein, The third lens has a crescent shape with its object-side surface and image-side surface convex toward the image side.

7. The electronic device according to any one of claims 1 to 6, wherein, The aperture stop is positioned adjacent to the object-side surface or image-side surface of the first lens.

8. The electronic device according to any one of claims 1 to 7, wherein, The electronic device satisfies the following [Equation 4], [Formula 4] 1.5≤nd3≤1.65 Wherein, "nd3" is the d-line refractive index of the third lens.

9. The electronic device according to any one of claims 1 to 8, wherein, The electronic device satisfies the following [Equation 5], [Formula 5] 0.6 ≤ f3 / f1 ≤ 4.5 Wherein, "f1" is the focal length of the first lens and "f3" is the focal length of the third lens.

10. The electronic device according to any one of claims 1 to 9, wherein, The fourth lens has a crescent shape with its object-side surface and image-side surface convex toward the object-side.

11. The electronic device according to any one of claims 1 to 10, wherein, Each of the object-side and image-side surfaces of the fourth lens has a recurved shape with the radius of curvature of the central portion adjacent to the optical axis and the radius of curvature of the edge portion having opposite signs.

12. The electronic device according to any one of claims 1 to 11, wherein, The electronic device satisfies the following [Equation 6], [Formula 6] 1.3 ≤ OAL / IH ≤ 1.6 Wherein, "OAL" is the distance from the object surface of the first lens to the image plane, and "IH" is the maximum height of the image plane.

13. The electronic device according to any one of claims 1 to 12, wherein, The electronic device is a laptop computer.

14. The electronic device according to 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 aspherical lenses.

15. The electronic device according to any one of claims 1 to 14, wherein, The distance from the object surface of the first lens to the image plane is less than or equal to about 1.8 mm.

Images