Lens module and display device comprising same

Patent metadata

Field	Value
Publication number	US-2024255732-A1
Application number	US-202218565835-A
Country	US
Kind code	A1
Filing date	May 31, 2022
Priority date	Jun 1, 2021
Publication date	Aug 1, 2024
Grant date	—

Abstract

A lens module according to one embodiment of the present invention comprises N lenses sequentially arranged from an object side to an image side, wherein: the N lens comprise a plurality of first coated lenses in which a first coating is applied to at least one surface thereof, and a plurality of second coated lenses in which a second coating is applied to at least one surface thereof; the first coating and the second coating have different thicknesses; and, in the plurality of first coated lenses, the angle (θ) between a line having a predetermined angle with respect to an optical axis and a normal line of a point in contact with the line on an object side surface is 50 degrees or higher.

First claim

1 . A lens module comprising N lenses disposed sequentially from an object side to an image side thereof,
wherein the N lenses include: a plurality of first coated lenses in which a first coating is applied to at least one surface thereof; and a plurality of second coated lenses in which a second coating is applied to at least one surface thereof, thicknesses of the first coating and the second coating are different, and the plurality of first coated lenses are lenses in which an angle (θ) between a line at a predetermined angle with respect to an optical axis and a normal line of a point at which the line comes into contact with an object side surface is 50° or more.

2 . The lens module of claim 1 , wherein the plurality of first coated lenses are a first lens and a second lens among the N lenses, and
the plurality of second coated lenses are the remaining lenses among the N lenses except for the first lens and the second lens.

3 . The lens module of claim 1 , wherein the first coating is thicker than the second coating, and
a difference between the thicknesses of the first coating and the second coating is 10% or more of the thickness of the second coating.

4 . The lens module of claim 1 , wherein the first coating is applied to the object side surface and an image side surface of at least one of the plurality of first coated lenses, and
the second coating is applied to an object side surface and an image side surface of at least one of the plurality of second coated lenses.

5 . A lens module comprising N lenses disposed sequentially from an object side to an image side thereof,
wherein the N lenses include: a first coated lens to which a first coating is applied; and a second coated lens to which a second coating is applied, the first coating includes a first layer to an X th layer disposed sequentially on a surface of a lens, the second coating includes a first layer to a Y th layer disposed sequentially on a surface of a lens, the first layer has the smallest thickness among the first layer to the X th layer in the first coating, the first layer has the smallest thickness among the first layer to the Y th layer in the second coating, and a thickness of the X th layer of the first coating is greater than a thickness of the Y th layer of the second coating.

6 . The lens module of claim 5 , wherein a thickness of an (X−1) th layer of the first coating is greater than a thickness of a (Y−1) th layer of the second coating.

7 . The lens module of claim 5 , wherein a thickness of the first coating is greater than a thickness of the second coating, and
a difference between the thickness of the first coating and the thickness of the second coating is 10% or more of the thickness of the second coating.

8 . The lens module of claim 5 , wherein a value of the X and a value of the Y are the same.

9 . The lens module of claim 8 , wherein the value of each of the X and the Y is 8.

10 . The lens module of claim 9 , wherein a first layer, a third layer, a fifth layer, and a seventh layer of each of the first coating and the second coating are formed of a first material,
a second layer, a fourth layer, a sixth layer, and an eighth layer of each of the first coating and the second coating are formed of a second material, and a refractive index of the first material is greater than a refractive index of the second material.

11 . The lens module of claim 10 , wherein each of the first material and the second material includes an oxide.

12 . The lens module of claim 5 , wherein an object side surface and an image side surface of the first coated lens include the first coating, and
an object side surface and an image side surface of the second coated lens include the second coating.

13 . The lens module of claim 12 , wherein a first lens and a second lens among the N lenses are the first coated lenses, and
the remaining lenses among the N lenses except for the first lens and the second lens are the second coated lenses.

14 . The lens module of claim 1 , wherein a transmittance of the first coating at an angle of incidence of 50° or more is higher than a transmittance of the second coating at an angle of incidence of 50° or more, and
a transmittance of the first coating at an angle of incidence of 0° or more and 40° or less is lower than a transmittance of the second coating at an angle of incidence of 0° or more and 40° or less.

15 . The lens module of claim 5 , wherein a transmittance of the first coating at an angle of incidence of 50° or more is higher than a transmittance of the second coating at an angle of incidence of 50° or more, and
a transmittance of the first coating at an angle of incidence of 0° or more and 40° or less is lower than a transmittance of the second coating at an angle of incidence of 0° or more and 40° or less.

Assignees

• Lg Innotek Co Ltd

Inventors

• Lee Tae Woo
• Kim Jin Young
• Joo Yang Hyun

Classifications

• G02B1/115

  Multilayers · CPC title

• G02B1/11

  Anti-reflection coatings · CPC title

• G02B9/62 Primary

  having six components only · CPC title

• G02B1/10

  Optical coatings produced by application to, or surface treatment of, optical elements (G02B1/08 takes precedence) · CPC title

• G02B13/00

  Optical objectives specially designed for the purposes specified below (with variable magnification {in general} G02B15/00) · CPC title