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WO2020009443A1 - Élément de modulation optique - Google Patents

Élément de modulation optique Download PDF

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Publication number
WO2020009443A1
WO2020009443A1 PCT/KR2019/008075 KR2019008075W WO2020009443A1 WO 2020009443 A1 WO2020009443 A1 WO 2020009443A1 KR 2019008075 W KR2019008075 W KR 2019008075W WO 2020009443 A1 WO2020009443 A1 WO 2020009443A1
Authority
WO
WIPO (PCT)
Prior art keywords
layer
base film
film
light modulator
buffer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2019/008075
Other languages
English (en)
Korean (ko)
Inventor
유정선
오동현
김남규
임은정
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LG Chem Ltd
Original Assignee
LG Chem Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by LG Chem Ltd filed Critical LG Chem Ltd
Priority to EP19830923.9A priority Critical patent/EP3819686B1/fr
Priority to CN201980031988.9A priority patent/CN112105973B/zh
Priority to JP2020563587A priority patent/JP7111290B2/ja
Priority to US15/734,347 priority patent/US11226519B2/en
Priority claimed from KR1020190079555A external-priority patent/KR102171302B1/ko
Publication of WO2020009443A1 publication Critical patent/WO2020009443A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/35—Non-linear optics

Definitions

  • an optical modulator such as a liquid crystal cell may generally include a spacer to maintain a cell gap between an upper base film and a lower base film.
  • a flexible base film may be required as the upper base film and the lower base film.
  • the present application relates to a light modulation device.
  • the light modulator may include a first base film and a second base film disposed to face each other.
  • the light modulator may include a light modulator layer disposed between the first base film and the second base film.
  • the light modulation layer may include a spacer.
  • the optical modulator may further include a buffer layer disposed outside the base film of at least one of the first base film and the second base film.
  • the buffer layer may be formed outside the first base film, outside the second base film, or outside each of the first base film and the second base film.
  • the light modulation layer may include a spacer.
  • the spacer may function as a cell gap holding member that maintains a gap between the first base film and the second base film.
  • the spacer may be a ball spacer or a column spacer.
  • the spacer may include at least one selected from a polymer material, a carbon material, an oxide material, and a composite material thereof.
  • the material of the ball spacer may be specifically silica, polysiloxane polymer or divinylbenzene copolymer.
  • the material of the column spacer may specifically be UV curable acrylate or epoxy.
  • the spacer may be a black spacer.
  • the black ball spacers can comprise carbon black and the black column spacers can also include carbon black.
  • the size of the spacer may be appropriately adjusted in consideration of the gap (cell gap) between the first base film and the second base film.
  • the size of the spacer may mean a particle diameter in the case of a ball spacer, and may mean a height in the case of a column spacer.
  • the size of the spacer can be, for example, 1 ⁇ m to 50 ⁇ m. Specifically, the size of the spacer may be 1 ⁇ m or more, 2 ⁇ m or more, or 3 ⁇ m or more, and 50 ⁇ m or less, 40 ⁇ m or less, 30 ⁇ m or less, or 20 ⁇ m or less.
  • the light modulation layer may include a plurality of spacers.
  • the plurality of spacers may be present in the light modulation layer spaced apart from each other.
  • the "spaced apart” may mean that the spaced apart state exists at predetermined intervals.
  • the first base film and / or the second base film may have surface curvature due to the difference between the degree of being pressed by the region where the spacer is present and the region where the spacer is not present.
  • the optical modulation device of the present application may improve the degree of recognition of the surface curvature by forming a buffer layer on the outside of the first base film and / or the second base film, and thus observe surface curvature when observing the surface reflection. This phenomenon can be suppressed.
  • the buffer layer 40 may sequentially include a buffer film 42 and an adhesive layer 41.
  • the buffer film may have a thickness of 50 ⁇ m or more. This thickness range may be more advantageous for improving the surface curvature of the base film.
  • the upper limit of the thickness of the buffer film may be, for example, 1000 ⁇ m or less.
  • the thickness of the buffer film may be 50 ⁇ m or more, 100 ⁇ m or more or 150 ⁇ m or more, and 1000 ⁇ m or less, 900 ⁇ m or less, 800 ⁇ m or less, 700 ⁇ m or less, 600 ⁇ m or less, or 550 ⁇ m or less.
  • the thickness range may also be appropriately selected.
  • the thickness range when using a PC film as the buffer film, may be 200 ⁇ m to 800 ⁇ m or 400 ⁇ m to 600 ⁇ m. In another example, when using a TAC film as the buffer film, the thickness range may be 50 ⁇ m to 350 ⁇ m or 150 ⁇ m to 250 ⁇ m.
  • the adhesive layer may include an OCA (Optically Clear Adhesive) adhesive.
  • the OCA pressure-sensitive adhesive may be a pressure-sensitive adhesive, for example, known pressure-sensitive adhesives such as acrylic pressure sensitive adhesive, silicone pressure sensitive adhesive, rubber pressure sensitive adhesive, urethane pressure sensitive adhesive can be used without particular limitation.
  • the OCA adhesive is a concept that is distinguished from an OCR (Optically Clear Resin) adhesive provided in a liquid phase, and may be mainly provided in a solid, semi-solid or elastic state.
  • the pressure-sensitive adhesive may be a kind of adhesive, and may mean a material having a function of adhering to the adherend even with a slight pressure applied to a portion of the adhesive without using water, solvent heat, or the like.
  • the thickness of the adhesive layer can be controlled.
  • the ratio (T1 / T2) of the thickness T1 of the pressure-sensitive adhesive layer and the thickness T2 of the base film (that is, the base film to which the pressure-sensitive adhesive layer is attached) may be in a range of about 0.1 to 4, inclusive. have.
  • the ratio T1 / T2 is in another example about 0.2 or more, about 0.3 or more, or about 0.4 or more, about 3.5 or less, about 3 or less, about 2.5 or less, about 2 or less, about 1.9 or less, 1.8 or less, 1.7 or less, 1.6 or less, 1.5 or less, 1.4 or less, 1.3 or less, 1.2 or less, 1.1 or less, or about 1 or less may be sufficient.
  • the ratio (T3 / T1) of the thickness T1 of the adhesive layer and the thickness T3 of the buffer film may be in the range of about 0.25 to 50.
  • the ratio (T3 / T1) is in another example about 0.5 or more, about 0.75 or more, about 1 or more, about 1.25 or more, about 1.5 or more, about 1.75 or more, about 2 or more, about 2.25 or more, or about 2.5 or more, or about 40 Or about 30 or less, about 20 or less, about 10 or less, about 9 or less, about 8 or less, about 7 or less, about 6 or less, or about 5 or less.
  • the surface curvature may have a convex portion in the region of the base film corresponding to the region where the spacer exists and have a concave portion in the region of the base film corresponding to the region where the spacer does not exist.
  • the height difference (B of FIG. 2) between the most convex region and the most concave region in the surface curvature of the base film may be 0.1 ⁇ m to 1 ⁇ m.
  • the height difference B may be specifically 0.2 ⁇ m to 0.8 ⁇ m or 0.4 ⁇ m to 0.6 ⁇ m. This height difference may depend on the size of the spacer or the flexibility of the base film.
  • the light modulation layer 30 may also have surface bending.
  • the light modulation layer may have a convex portion in the region where the spacer is present and may have a concave portion in the region where the spacer does not exist.
  • the height difference (A of FIG. 2) between the most convex region and the most concave region in the surface curvature of the light modulation layer may be 0.1 ⁇ m to 1 ⁇ m.
  • the height difference A may be specifically 0.2 ⁇ m to 0.8 ⁇ m or 0.4 ⁇ m to 0.6 ⁇ m.
  • the minimum value (D) of the thickness of the adhesive layer may be a value obtained by subtracting the height difference due to the surface curvature from the thickness of the adhesive layer itself.
  • the maximum value C of the thickness of the adhesive layer may be about 19 ⁇ m to 20 ⁇ m.
  • the flexible film may be advantageous in terms of flexibility as the radius of curvature is small.
  • the radius of curvature of the flexible film can be adjusted to a level of about 1 mm to 10 mm if necessary.
  • the radius of curvature of the optical modulation device to which the flexible film is applied may be about 40 mm to about 50 mm.
  • the radius of curvature of the optical modulation element is somewhat large because the cracking of the electrode layer or the adhesion of the sealant that maintains the cell gap can be considered.
  • the radius of curvature of the flexible display device to which the optical modulator is applied may be about 50 mm to about 200 mm.
  • the radius of curvature of the flexible film, the optical modulation element, or the flexible display device may be appropriately changed in consideration of the shape of the final product.
  • the alignment layer may have an alignment force capable of controlling an initial alignment state of the liquid crystal compound when the light modulation layer includes a liquid crystal compound as a light modulation material.
  • the alignment layer may be a vertical alignment layer or a horizontal alignment layer.
  • both the first alignment film and the second alignment film are vertical alignment films, or both horizontal alignment films, Alternatively, one may be a vertical alignment layer and one may be a horizontal alignment layer.
  • the functional layer may be formed by separately preparing a functional layer and adhering to the outside of the buffer layer, coating the functional layer composition on the outside of the buffer layer, or depositing a functional layer material on the buffer layer.
  • the structure of the eyewear is not particularly limited. That is, the light modulator may be included and applied to the left eye and / or right eye lens of a known eyewear structure.
  • FIG. 2 is an enlarged view of a part of an optical modulator for explaining surface curvature.
  • FIG. 4 exemplarily shows a light modulator of Comparative Example 1.

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

La présente invention concerne un élément de modulation optique et son utilisation, et améliore l'ondulation de surface d'un film de substrat, qui est provoquée par un élément d'espacement, de sorte à supprimer un phénomène d'ondulation de surface observé lorsque la réflexion de surface est observée visuellement. L'élément de modulation optique peut être appliqué à divers dispositifs d'affichage flexibles, améliorant ainsi la qualité de ces produits.
PCT/KR2019/008075 2018-07-02 2019-07-02 Élément de modulation optique Ceased WO2020009443A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP19830923.9A EP3819686B1 (fr) 2018-07-02 2019-07-02 Élément de modulation optique
CN201980031988.9A CN112105973B (zh) 2018-07-02 2019-07-02 光学调制元件
JP2020563587A JP7111290B2 (ja) 2018-07-02 2019-07-02 光変調素子
US15/734,347 US11226519B2 (en) 2018-07-02 2019-07-02 Optical modulation element

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20180076481 2018-07-02
KR10-2018-0076481 2018-07-02
KR10-2019-0079555 2019-07-02
KR1020190079555A KR102171302B1 (ko) 2018-07-02 2019-07-02 광변조 소자

Publications (1)

Publication Number Publication Date
WO2020009443A1 true WO2020009443A1 (fr) 2020-01-09

Family

ID=69060101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2019/008075 Ceased WO2020009443A1 (fr) 2018-07-02 2019-07-02 Élément de modulation optique

Country Status (1)

Country Link
WO (1) WO2020009443A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021140076A (ja) * 2020-03-06 2021-09-16 凸版印刷株式会社 調光シートおよび調光装置

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7692755B2 (en) * 2004-08-26 2010-04-06 Sharp Kabushiki Kaisha Liquid crystal display device including protrusion with recessed portion for accepting spherical spacer
US7705959B2 (en) * 2001-09-18 2010-04-27 Alphamicron, Inc. Curved optical device and method having a pair of opposed thermoplastic substrates with spacers therebetween to permanently retain a curved shape
JP4512415B2 (ja) * 2004-05-11 2010-07-28 日本放送協会 液晶光変調器および液晶表示装置
KR20170072573A (ko) * 2015-12-17 2017-06-27 주식회사 엘지화학 액정 윈도우 및 이를 포함하는 광학 소자
KR101775332B1 (ko) 2009-06-11 2017-09-06 스위치 머티리얼즈 인코퍼레이티드 가변 투과율 광 필터 및 그 사용 방법
KR20170117893A (ko) * 2016-04-14 2017-10-24 주식회사 엘지화학 투과도 가변 필름
KR20180076481A (ko) 2016-12-28 2018-07-06 엘지디스플레이 주식회사 터치 패널을 갖는 표시 장치 및 그의 터치 구동 리셋 제어 방법
KR20190079555A (ko) 2017-12-27 2019-07-05 삼성전자주식회사 수직 바이폴라 트랜지스터

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7705959B2 (en) * 2001-09-18 2010-04-27 Alphamicron, Inc. Curved optical device and method having a pair of opposed thermoplastic substrates with spacers therebetween to permanently retain a curved shape
JP4512415B2 (ja) * 2004-05-11 2010-07-28 日本放送協会 液晶光変調器および液晶表示装置
US7692755B2 (en) * 2004-08-26 2010-04-06 Sharp Kabushiki Kaisha Liquid crystal display device including protrusion with recessed portion for accepting spherical spacer
KR101775332B1 (ko) 2009-06-11 2017-09-06 스위치 머티리얼즈 인코퍼레이티드 가변 투과율 광 필터 및 그 사용 방법
KR20170072573A (ko) * 2015-12-17 2017-06-27 주식회사 엘지화학 액정 윈도우 및 이를 포함하는 광학 소자
KR20170117893A (ko) * 2016-04-14 2017-10-24 주식회사 엘지화학 투과도 가변 필름
KR20180076481A (ko) 2016-12-28 2018-07-06 엘지디스플레이 주식회사 터치 패널을 갖는 표시 장치 및 그의 터치 구동 리셋 제어 방법
KR20190079555A (ko) 2017-12-27 2019-07-05 삼성전자주식회사 수직 바이폴라 트랜지스터

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3819686A4

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021140076A (ja) * 2020-03-06 2021-09-16 凸版印刷株式会社 調光シートおよび調光装置
JP7467993B2 (ja) 2020-03-06 2024-04-16 Ｔｏｐｐａｎホールディングス株式会社 調光シートおよび調光装置

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