Optical lens system and electronic device including the same

1. An optical lens system of an electronic device, the optical lens system comprising:

a lens assembly;

an iris; and

an image sensor configured to form an image of an object corresponding to the lens assembly,

wherein the lens assembly includes:

a first lens having positive refractive power; and

a second lens having negative refractive power, and

wherein the iris, the first lens, and the second lens are sequentially arranged from an object-side to an image sensor-side along an optical axis,

wherein the electronic device further includes a housing surrounding at least a first portion of the lens assembly,

wherein the iris is disposed in a camera hole of the electronic device formed in an active area of a display panel,

wherein the iris is at least partially disposed in a plane of the display panel, and

the optical lens system of the electronic device satisfies Equations 1 and 2 below:

1.1

≤

STL

TL

≤

1.5

[

Equation

⁢

⁢

1

]

0.2

≤

S

⁢

⁢

1

EPD

≤

1.0

[

Equation

⁢

⁢

2

]

wherein, STL is a distance from the iris to an image plane of the image sensor on the optical axis,

TL is a distance from an object-side apex of a lens closest to the object-side among a plurality of lenses included in the lens assembly to the image plane on the optical axis,

EPD is a diameter of an entrance pupil of the optical lens system, and S1 is a distance from the iris to the lens closest to the object-side among the plurality of lenses included in the lens assembly,

wherein the optical lens system further includes an extension extending from the housing of the lens assembly or from a fixed structure disposed in the electronic device, the extension at least partially enclosing a second portion of the lens assembly that extends beyond an interior of the housing, and an end thereof that is disposed at least partially within the camera hole, and

wherein the iris is disposed at the end of the extension.

2. The optical lens system of claim 1 , wherein the lens assembly is configured move on the optical axis, and the iris is fixed in position on the optical axis, and

wherein the extension includes a sidewall extending vertically from the housing or from the fixed structure, the sidewall having a shape following a contour of the second portion of the lens assembly that extends beyond the interior of the housing.

3. The optical lens system of claim 1 , wherein a surface of at least one of the first lens or the second lens, facing the object-side, is convex, and a surface of the second lens facing an image-side, is concave.

4. The optical lens system of claim 1 , wherein the lens assembly further includes a front lens disposed between the iris and the first lens.

5. The optical lens system of claim 1 , wherein the lens assembly further comprises a third lens and a fourth lens between the second lens and the image sensor.

6. The optical lens system of claim 1 , wherein the optical lens system satisfies Equation 3 below:

0.7

≤

EPD

Y

⁢

⁢

1

≤

1.0

[

Equation

⁢

⁢

3

]

wherein, Y1 is an effective diameter of the lens closest to the object-side among the plurality of lenses included in the lens assembly.

7. The optical lens system of claim 1 , wherein the optical lens system satisfies Equation 4 below:

1.5

≤

S

⁢

⁢

TL

Y

1

⁢

⁢

H

≤

2.5

[

Equation

⁢

⁢

4

]

wherein, Y 1H is a height of the image plane.

8. The optical lens system of claim 1 , wherein the optical lens system satisfies Equation 5 below:

0.1

≤

S

⁢

⁢

1

Y

1

⁢

⁢

H

≤

1.0

[

Equation

⁢

⁢

5

]

wherein, Y 1H is a height of the image plane.

9. The optical lens system of claim 1 , wherein the optical lens system satisfies Equation 6 below:

1.65< N 2  [Equation 6]

wherein N2 is a refractive index of the second lens in which a surface, which faces an image-side, is concave and has negative refractive power.

10. The optical lens system of claim 1 , wherein the optical lens system satisfies Equation 7 below:

1.2

≤

f



f

⁢

⁢

max



≤

2.0

[

Equation

⁢

⁢

7

]

wherein, f is a composite focal length of the optical lens system, and fmax is a focal length of a lens having strongest refractive power among a plurality of lenses.

11. The optical lens system of claim 1 , wherein the lens assembly includes at least three plastic injection-molded aspheric lenses.

12. The optical lens system of claim 1 , wherein the lens assembly includes at least one aspheric lens having at least one inflection point.

13. An electronic device comprising:

an iris;

a lens assembly movable in an optical axis direction; and

an image sensor having an image plane configured to form an electronic signal representing an image formed by light from the lens assembly,

wherein, when focusing the image formed on the image plane, a distance between the iris and the image plane is fixed, and the lens assembly moves in the optical axis direction,

wherein the electronic device further includes a housing surrounding at least a portion of the lens assembly,

wherein the iris is disposed in a camera hole, the camera hole extending from at least one side of the housing and formed in an active area of a display panel,

wherein the iris is at least partially disposed in a plane of the display panel,

wherein the electronic device further includes an extension extending from the housing of the lens assembly or from a fixed structure disposed in the electronic device, the extension at least partially enclosing a second portion of the lens assembly that extends beyond an interior of the housing, and an end thereof that is disposed at least partially within the camera hole, and

wherein the iris is disposed at the end of the extension.

14. The electronic device of claim 13 , wherein the lens assembly includes at least four lenses including a first lens having positive refractive power and a second lens having negative refractive power, and

the iris is located closer to an object-side than an object-side surface of a lens closest to the object-side among a plurality of lenses of the lens assembly.

15. The electronic device of claim 14 , wherein the electronic device satisfies Equations 1 and 2 below:

1.1

≤

STL

TL

≤

1.5

[

Equation

⁢

⁢

1

]

0.2

≤

S

⁢

⁢

1

EPD

≤

1.0

[

Equation

⁢

⁢

2

]

wherein STL is a distance from the iris to the image plane of the image sensor on the optical axis, TL is a distance from an object-side apex of the lens closest to the object-side among the plurality of lenses included in the lens assembly to the image plane on the optical axis, EPD is a diameter of an entrance pupil of the electronic device, and S1 is a distance from the iris to the lens closest to the object-side among the plurality of lenses included in the lens assembly.

16. An electronic device comprising:

a window member;

a display panel stacked on a rear surface of the window member;

a lens assembly;

an iris; and

an image sensor including an image plane configured to form an electronic signal representing an image formed by the lens assembly,

wherein the iris is fixed with respect to the image plane,

wherein at least a portion of the iris is located on a same plane as at least a portion of the display panel, and

the iris is located closer to an object-side than an object-side surface of a lens closest to the object-side of the lens assembly on an optical axis,

wherein the electronic device further includes a housing surrounding at least a first portion of the lens assembly,

wherein the iris is disposed in a camera hole of the electronic device formed in an active area of the display panel,

wherein the iris is at least partially disposed in a plane of the display panel,

wherein the electronic device further includes an extension extending from the housing of the lens assembly or from a fixed structure disposed in the electronic device, the extension at least partially enclosing a second portion of the lens assembly that extends beyond an interior of the housing, and an end thereof that is disposed at least partially within the camera hole, and

wherein the iris is disposed at the end of the extension.

17. The electronic device of claim 16 , wherein the electronic device satisfies Equations 1 and 2 below:

1.1

≤

STL

TL

≤

1.5

[

Equation

⁢

⁢

1

]

0.2

≤

S

⁢

⁢

1

EPD

≤

1.0

[

Equation

⁢

⁢

2

]

wherein, STL is a distance from the iris to the image plane of the image sensor on the optical axis, TL is a distance from an object-side apex of the lens closest to the object-side among a plurality of lenses included in the lens assembly to the image plane on the optical axis, EPD is a diameter of an entrance pupil of the electronic device, and S1 is a distance from the iris to the lens closest to the object-side among the plurality of lenses included in the lens assembly.

18. An optical lens system of an electronic device, the optical lens system comprising:

a lens assembly;

an iris; and

an image sensor configured to form an image of an object corresponding to the lens assembly,

wherein the lens assembly includes:

a front lens located closest from an object-side in the lens assembly;

a first lens having positive refractive power; and

a second lens having negative refractive power,

wherein the iris, the front lens, the first lens, and the second lens are sequentially arranged from the object-side to an image sensor-side along an optical axis,

wherein the electronic device further includes a housing surrounding at least a first portion of the lens assembly,

wherein the iris is disposed in a camera hole of the electronic device formed in an active area of a display panel,

wherein the iris is at least partially disposed in a plane of the display panel, and

the optical lens system of the electronic device satisfies Equations 1 and 2 below:

1.1

≤

STL

TL

≤

1.5

[

Equation

⁢

⁢

1

]

0.2

≤

S

⁢

⁢

1

EPD

≤

1.0

[

Equation

⁢

⁢

2

]

wherein, STL is a distance from the iris to an image plane of the image sensor on the optical axis, TL is a distance from an object-side apex of the front lens to the image plane on the optical axis, EPD is a diameter of an entrance pupil of the optical lens system, and S1 is a distance from the iris to the front lens,

wherein the optical lens system further includes an extension extending from the housing of the lens assembly or from a fixed structure disposed in the electronic device, the extension at least partially enclosing a second portion of the lens assembly that extends beyond an interior of the housing, and an end thereof that is disposed at least partially within the camera hole, and

wherein the iris is disposed at the end of the extension.

19. The optical lens system of claim 18 , wherein the optical lens system satisfies Equation 3 below:

0.7

≤

EPD

Y

⁢

⁢

1

≤

1.0

[

Equation

⁢

⁢

3

]

wherein Y1 is an effective diameter of the front lens.