WO2016047990A2 - Électrode de détection tactile formée d'un seul tenant avec une plaque de polarisation, dispositif d'affichage la comprenant, et son procédé de fabrication - Google Patents

Électrode de détection tactile formée d'un seul tenant avec une plaque de polarisation, dispositif d'affichage la comprenant, et son procédé de fabrication Download PDF

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Publication number
WO2016047990A2
WO2016047990A2 PCT/KR2015/009913 KR2015009913W WO2016047990A2 WO 2016047990 A2 WO2016047990 A2 WO 2016047990A2 KR 2015009913 W KR2015009913 W KR 2015009913W WO 2016047990 A2 WO2016047990 A2 WO 2016047990A2
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WO
WIPO (PCT)
Prior art keywords
touch sensing
sensing electrode
polarizing plate
retardation film
inclination angle
Prior art date
Application number
PCT/KR2015/009913
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English (en)
Korean (ko)
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WO2016047990A3 (fr
Inventor
이재현
최병진
박동필
서용원
송병훈
Original Assignee
동우 화인켐 주식회사
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Publication date
Priority claimed from KR1020150043560A external-priority patent/KR102207545B1/ko
Application filed by 동우 화인켐 주식회사 filed Critical 동우 화인켐 주식회사
Priority to US15/511,074 priority Critical patent/US20170277291A1/en
Priority to CN201580051440.2A priority patent/CN106796465B/zh
Publication of WO2016047990A2 publication Critical patent/WO2016047990A2/fr
Publication of WO2016047990A3 publication Critical patent/WO2016047990A3/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means

Definitions

  • the present invention relates to a polarizing plate integrated touch sensing electrode, a display device including the same, and a manufacturing method thereof, and more particularly, to a polarizing plate integrated touch sensing electrode applicable to a flexible display or a foldable display.
  • the present invention relates to a display device including the same, and a manufacturing method thereof.
  • the display device has been changed from a CRT type to a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), or the like.
  • LCD liquid crystal display
  • PDP plasma display panel
  • OLED organic light emitting diode
  • the currently developed foldable display (that is, the foldable display according to the prior art) is reduced in anti-reflection performance in the bent portion is formed when the bending axis is folded relative to the bending portion and the non-bent portion, Accordingly, there is a problem that the visibility of the bent portion is lowered and the performance of the display as a whole decreases.
  • the present invention is to solve the above problems, an object of the present invention is to provide a polarizing plate integrated touch sensing electrode that can improve visibility by maintaining the antireflection performance of the bent portion and the non-bent portion in the foldable display and the same It is to provide a display device and a manufacturing method comprising the same.
  • Another object of the present invention is to provide a polarizing plate-integrated touch sensing electrode having a slow axis of a retardation film formed to have a bending axis and an inclination angle of a foldable display, a display device including the same, and a manufacturing method thereof.
  • the polarizing plate-integrated touch sensing electrode of one embodiment of the present invention capable of folding and unfolding based on the bending axis;
  • a retardation film provided on the touch sensing electrode and having a slow axis formed to have an inclination angle with the bending axis;
  • a polarizing plate provided on the retardation film.
  • the inclination angle is preferably 40 ° to 50 °, more preferably 45 °.
  • the thickness of the said retardation film becomes like this.
  • it is 100 micrometers or less, More preferably, it is 50 micrometers or less.
  • the retardation film is a reverse wavelength dispersibility having a low refractive index for short wavelengths and a high refractive index for long wavelengths.
  • the difference in phase difference between the bent portion where the bend is formed and the non-bending portion that is not formed is preferably 10 nm or less, preferably 5 nm or less.
  • the manufacturing method of the polarizing plate integrated touch sensing electrode of one embodiment of the present invention includes the steps of: laminating a phase difference film on a substrate; Forming a touch sensing electrode on the retardation film, the touch sensing electrode being able to be folded and unfolded based on a bending axis; Delaminating the retardation film on which the touch sensing electrode is formed on the substrate; And attaching a polarizing plate on the retardation film on which the touch sensing electrode is formed, wherein the slow axis of the retardation film has an inclination angle with the bending axis.
  • a method of manufacturing a polarizing plate-integrated touch sensing electrode includes forming a touch sensing electrode that can be folded and unfolded based on a bending axis on a substrate; Transferring the touch sensing electrode onto a retardation film; And attaching a polarizing plate on the retardation film on which the touch sensing electrode is formed, wherein the slow axis of the retardation film has an inclination angle with the bending axis.
  • the forming of the touch sensing electrode includes photolithography of the touch sensing electrode such that the longitudinal direction and the bending axis of the substrate have an inclination angle on the rectangular substrate.
  • the polarizing plate-integrated touch sensing electrode according to the present invention may improve visibility by maintaining antireflection performance of the bent portion and the non-bended portion in the foldable display at the same level, thereby improving display performance.
  • the polarizing plate-integrated touch sensing electrode according to the present invention can improve the anti-reflection performance of the bent portion without additional processes or costs by forming a slow axis of the retardation film to have an inclination angle with the bend axis of the foldable display.
  • FIG. 1 is a block diagram of a polarizer integrated touch sensing electrode according to an embodiment of the present invention.
  • FIG. 2 is a view illustrating a state in which a polarizer integrated touch sensing electrode is unfolded.
  • FIG. 3 is a view illustrating a state in which a polarizer integrated touch sensing electrode is folded.
  • FIG. 4 is a view illustrating a polarizer integrated touch sensing electrode having a polarizer absorption axis parallel to a bending axis and a slow axis of a retardation film having an inclination angle of 45 °.
  • FIG. 5 illustrates a polarizer integrated touch sensing electrode having a polarizer absorption axis perpendicular to a bending axis and a slow axis of a retardation film having an inclination angle of 45 °.
  • FIG. 6 is a view showing a polarizing plate-integrated touch sensing electrode in which the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis and the slow axis of the retardation film is parallel.
  • FIG. 7 illustrates a polarizer integrated touch sensing electrode having a 45 ° inclination angle of the polarizer absorption axis and a slow axis of the retardation film perpendicular to the bending axis.
  • FIG. 8 is a view schematically illustrating a method of manufacturing a polarizer integrated touch sensing electrode according to the prior art by applying the manufacturing method according to the prior art.
  • FIG. 9 is a view schematically illustrating a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying a manufacturing method according to the prior art.
  • FIG. 10 is a view schematically illustrating a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the present invention.
  • FIG. 1 is a block diagram of a polarizer integrated touch sensing electrode according to an embodiment of the present invention.
  • the polarizing plate-integrated touch sensing electrode may include a phase difference film 240, an adhesive 230, and a touch sensing electrode 100 capable of sensing a human touch.
  • the polarizer 220 and the protective film 210 are provided.
  • the touch sensing electrode 100 includes, for example, a first sensing pattern for sensing the position of the x-coordinate and a second sensing pattern for sensing the position of the y-coordinate on the display, as disclosed in Korean Patent Publication No. 10-1401050.
  • a touch is made by a person or the like, the touched position on the display can be detected by transmitting the x coordinate and the y coordinate to a control unit (microprocessor) or the like.
  • the touch sensing electrode 100 may use various known methods in addition to the above-described method.
  • the polarizing plate 200 may be composed of a polarizer 220 and a protective film 210 as illustrated in FIG. 1, wherein the retardation film 240 is attached to the polarizer 220 through the pressure-sensitive adhesive 230. This can be formed.
  • a variety of known polarizing plates may be used in addition to the form shown in FIG. 1.
  • the protective film 210 is not particularly limited as long as the film is excellent in transparency, mechanical strength, thermal stability, moisture shielding, and isotropy.
  • polyester-based resin such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate; Cellulose resins such as diacetyl cellulose and triacetyl cellulose; Polycarbonate resins; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin resins such as polyethylene, polypropylene, cyclo-based or norbornene-structured polyolefins, ethylene propylene copolymers; Vinyl chloride-based resins; Polyamide resins such as nylon and aromatic polyamide; Imide resin; Polyether sulfone resin; Sulfone resins; Polyether ketone resins; Sulfided polyphenylene resins; Vinyl alcohol-based resins; Vinylidene chloride-based resins; Vinyl butyral resin; All
  • the film which consists of thermosetting resins or ultraviolet curable resins, such as a (meth) acrylic-type, urethane type, an epoxy type, and a silicone type.
  • thermosetting resins or ultraviolet curable resins such as a (meth) acrylic-type, urethane type, an epoxy type, and a silicone type.
  • a cellulose-based film having a surface saponified by saponification with alkali or the like, such as a TAC (Triacetyl cellulose; triacetyl cellulose) film is preferably considered in consideration of polarization characteristics or durability.
  • the protective film may have a function of the optical compensation layer.
  • the polarizer 220 is an optical film that serves to change the incident natural light into a desired single polarization state (linear polarization state), and is not particularly limited as long as it can generally perform a polarization function in the art.
  • PVA polyvinyl alcohol
  • a thin polarizing plate, etc. coated with an insulating layer may be used.
  • Polyvinyl alcohol-type resin which comprises a polarizer can be manufactured by saponifying polyvinyl acetate type resin.
  • the polyvinyl acetate-based resin include copolymers with other monomers copolymerizable with vinyl acetate, in addition to polyvinyl acetate, which is a homopolymer of vinyl acetate.
  • Specific examples of the other monomer copolymerizable with vinyl acetate include unsaturated carboxylic acids, unsaturated sulfonic acids, olefins, vinyl ethers, acrylamides having an ammonium group, and the like.
  • the polyvinyl alcohol-based resin may be modified, for example, polyvinyl formal or polyvinyl acetal modified with aldehydes may be used.
  • the degree of saponification of the polyvinyl alcohol-based resin may be 85 to 100 mol%, preferably 98 mol% or more.
  • the degree of polymerization of the polyvinyl alcohol-based resin is usually 1,000 to 10,000, preferably 1,500 to 5,000.
  • This polyvinyl alcohol-based resin is formed into a film and used as a polarizer.
  • the film forming method of the polyvinyl alcohol-based resin is not particularly limited, and various known methods can be used.
  • the film thickness of the polyvinyl alcohol-based resin is not particularly limited, and may be, for example, 10 to 150 ⁇ m.
  • the adhesive 230 serves to adhere the polarizer 220 to the retardation film 240, and various adhesives in a known form, such as a pressure sensitive adhesive (PSA) film, may be used.
  • PSA pressure sensitive adhesive
  • the retardation film 240 can be obtained, for example, by orienting the polymer film in the uniaxial direction, in the biaxial direction, or in other suitable methods.
  • the kind of the polymer compound constituting the polymer film is not particularly limited.
  • a high transparency polymer compound suitable for use in a liquid crystal display device such a compound is a polycarbonate compound, a polyester compound, a polysulfone compound, a polyether sulfone compound, a polystyrene compound And polyolefin compounds, polyvinyl alcohol compounds, cellulose acetate compounds, polymethyl methacrylate compounds, polyvinyl chloride compounds, polyacrylate polyvinyl chloride compounds, polyamide chloride polyvinyl chloride compounds, and the like.
  • the retardation film may be made of nematic or smectic, preferably nematic liquid crystal material, which is polymerizable by in situ polymerization.
  • it can be prepared by coating a polymerizable liquid crystal material on a substrate, oriented in a planar orientation and subsequently polymerizing by exposure to heat or ultraviolet light.
  • the retardation film 240 is an ellipse of the linearly polarized light by the polarizer 220 using a reverse wavelength dispersible lambda / 4 phase difference film having a low refractive index for short wavelengths and a high refractive index for long wavelengths Try to have circular polarization, not shape.
  • FIG. 2 is a view illustrating an unfolded state in which the polarizing plate integrated touch sensing electrode is unfolded, and the curved portion and the non-curved portion show no curved state.
  • FIG. 3 is a view illustrating a state in which a polarizing plate-integrated touch sensing electrode is folded, and a bent portion is folded based on a bending axis to show a state in which bending occurs.
  • the structure of the polarizing plate to which the retardation film is attached is the same as that of the embodiment of FIG. 1, and a protective film constituting the polarizing plate is a 25 ⁇ m Triacetyl cellulose (TAC) film, and the polarizer is a 22 ⁇ m polyvinyl alcohol (PVA) film.
  • TAC Triacetyl cellulose
  • PVA polyvinyl alcohol
  • the pressure sensitive adhesive was a PSA (Pressure sensitive adhesive) film having a thickness of 15 ⁇ m and a 50 ⁇ m lambda / 4 phase difference film (trade name WRS film) having a reverse wavelength dispersion.
  • the polarizer absorption axis was parallel to the bending axis and the slow axis of the retardation film was formed to have a 45 ° inclination angle with respect to the bending axis (see FIG. 4).
  • the structure and material of the polarizing plate with retardation film are the same as in Example 1.
  • the polarizer absorption axis is perpendicular to the bending axis and the slow axis of the retardation film is different from the point formed to form a 45 ° inclination angle with respect to the bending axis (see FIG. 5).
  • the structure and material of the polarizing plate with retardation film are the same as in Example 1.
  • the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis, and the slow axis of the retardation film is different from the point formed in parallel with the bending axis (see FIG. 6).
  • the structure and material of the polarizing plate with retardation film are the same as in Example 1.
  • the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis, and the slow axis of the retardation film is different from the point formed perpendicular to the bending axis (see FIG. 7).
  • Table 1 shows the results of measuring the front phase difference Ro and the color difference ⁇ Eab of the bent portion and the non-bended portion, respectively in Examples 1 and 2 (invention) and Comparative Examples 1 and 2.
  • the phase difference of the non-bending portion is relatively the same in Examples 1, 2 and Comparative Examples 1, 2, but the phase difference of the bending portion is smaller as the slow axis of the retardation film is parallel to the bending axis (see Comparative Example 1). Appear and become vertical (see Comparative Example 2), and appear larger, especially when the slow axis of the retardation film forms an inclination angle of 45 ° with respect to the bending axis (see Examples 1 and 2). It can be seen.
  • the difference in phase difference between the bent portion and the non-bended portion is preferably 5 nm or less, and should be at least 10 nm or less.
  • the difference between the phase difference between the curved portion and the non-flex portion is greater than 10 nm, the difference in reflection color may occur.
  • the color difference ⁇ Eab of the curved portion and the non-flex portion exceeds 3, the human body may feel it.
  • ⁇ E * ab and ⁇ E * uv as the definition of Uniform Color Space established in 1976. Among them, ⁇ E * ab is widely used.If ⁇ E * ab is 3 or less, people do not feel color difference. It is not used as a standard.
  • the slow axis of the retardation film has an inclination angle of 40 ° to 50 ° with respect to the bend axis, and preferably at 45 ° inclination, the difference in phase difference between the bent portion and the non-bending portion is reduced, thereby substantially the same performance (eg antireflection). Function), thereby improving visibility and improving performance of the foldable display.
  • Table 2 shows the front phase difference Ro and the color difference ⁇ Eab when the inclination angles of the slow axis and the bending axis of the retardation film are 40 °, 45 °, and 50 °, respectively, based on the second embodiment. ) Shows the result of the measurement.
  • the thickness of the retardation film is thinner, the difference in phase difference between the bent portion and the non-bending portion is smaller.
  • the thickness of the retardation film is preferably 100 ⁇ m or less, and more preferably 50 ⁇ m or less.
  • Table 3 shows the results of measuring the front phase difference Ro of the bent portion and the non-bended portion when the thickness of the retardation film is 50 ⁇ m, 70 ⁇ m, and 100 ⁇ m, respectively.
  • FIG. 8 schematically illustrates a method of manufacturing a polarizer integrated touch sensing electrode according to the prior art by applying the manufacturing method according to the prior art.
  • the retardation film 240 and the polarizing plate are formed thereon. 200) was laminated to manufacture a polarizer integrated touch sensing electrode.
  • a plurality of rectangular touch sensing using photolithography technology is performed on 1,300mm ⁇ 1500mm glass.
  • the length direction of the touch sensing electrode is formed to be the same as the length direction of the glass, and thus the bending axis of the touch sensing electrode is also formed to be the same as the length direction of the glass.
  • the retardation film 240 having the same shape and size (1,300mm ⁇ 1,500mm) as the glass is gradually laminated on the glass on which the touch sensing electrode is formed, and the polarizing plate 200 is attached thereon, thereby bending the touch sensing electrode.
  • a polarizing plate-integrated touch sensing electrode having substantially the same axis as the slow axis of the retardation film was produced.
  • the chamfering ratio of the glass on which the touch sensing electrode is formed is about 99%
  • the chamfering ratio of the retardation film is about 99%.
  • the bending axis of the touch sensing electrode and the slow axis of the retardation film should be manufactured to form an inclination angle (40 ° to 50 °, preferably 45 °).
  • 9 schematically illustrates a method of manufacturing a polarizing plate-integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the prior art.
  • the longitudinal direction of the touch sensing electrode is formed to be the same as the longitudinal direction of the glass, and thus the bending axis of the touch sensing electrode is also formed to be the same as the longitudinal direction of the glass.
  • the phase difference film 240 forms an inclination angle on the glass on which the touch sensing electrode is formed.
  • 1,980 mm wide retardation film It must be layered, so a 1,980 mm wide retardation film must be used to cover the entire 1,300 mm x 1500 mm glass.
  • the 1,980 mm wide retardation film is not currently in mass production, and even when using a wide retardation film of 1,980 mm, the chamfering rate is lowered to about 47% to increase the cost.
  • FIG. 10 schematically illustrates a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the present invention.
  • the retardation film 240 is laminated on a transparent substrate, and a plurality of touch sensing electrodes 100 are laminated thereon using photolithography technology.
  • the retardation film is laminated so that the slow axis of the retardation film is the same as the longitudinal direction of the rectangular transparent substrate, and the bending axis of the touch sensing electrode is inclined angle (40 ° to 50 °, preferably 45 °) of the rectangular transparent substrate. To have).
  • the retardation film on which the touch sensing electrode is formed is delaminated on the transparent substrate, and the polarizing plate 200 is attached thereon in the longitudinal direction of the rectangular transparent substrate, the bending axis of the touch sensing electrode and the slow axis of the retardation film
  • the polarizing plate-integrated touch sensing electrode forming this inclination angle can be manufactured.
  • a plurality of touch sensing electrodes 100 are formed on the transparent substrate by using photolithography technology, in which case the longitudinal direction of the rectangular transparent substrate and the bending axis of the touch sensing electrodes are inclined angles ( 40 ° to 50 °, preferably 45 °).
  • the touch sensing electrode is transferred to the retardation film.
  • the slow axis of the retardation film and the bending axis of the touch sensing electrode are formed to have an inclination angle.
  • the polarizing plate integrated touch sensing electrode may be manufactured in which the bending axis of the touch sensing electrode and the slow axis of the retardation film form an inclination angle.
  • a plurality of rectangular touch sensing electrodes using photolithography technology on 1,300mm ⁇ 1500mm glass In this case, a mask is formed such that the longitudinal direction of the rectangular glass and the bending axis of the touch sensing electrode have an inclination angle (40 ° to 50 °, preferably 45 °). do.
  • a retardation film 240 having substantially the same shape and size (1300 mm ⁇ 1500 mm) as the glass is laminated to the glass before photolithography to be integrated with the touch sensing electrode (see the first method) or after the photolithography touch sensing electrode.
  • a polarizing plate-integrated touch sensing electrode having an inclination angle between the bending axis of the touch sensing electrode and the slow axis of the retardation film is manufactured.
  • the chamfering ratio (touch sensing electrode utilization rate on the mask) of the glass on which the touch sensing electrode is formed is 80% or more, and the chamfering ratio of the retardation film is about 99%.

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  • General Engineering & Computer Science (AREA)
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Abstract

La présente invention concerne une électrode de détection tactile formée d'un seul tenant avec une plaque de polarisation, un dispositif d'affichage la comprenant, et son procédé de fabrication. Ladite électrode de détection tactile formée d'un seul tenant avec une plaque de polarisation, comprend : une électrode de détection tactile qui peut être pliée et dépliée par rapport à un axe de flexion ; un film de retard qui est disposé sur l'électrode de détection tactile et présente un axe lent formé sur celui-ci de façon à former angle d'inclinaison par rapport à l'axe de flexion ; et une plaque de polarisation disposée sur le film de retard.
PCT/KR2015/009913 2014-09-25 2015-09-22 Électrode de détection tactile formée d'un seul tenant avec une plaque de polarisation, dispositif d'affichage la comprenant, et son procédé de fabrication WO2016047990A2 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US15/511,074 US20170277291A1 (en) 2014-09-25 2015-09-22 Touch sensing electrode integrally formed with polarizing plate, display device comprising same, and manufacturing method therefor
CN201580051440.2A CN106796465B (zh) 2014-09-25 2015-09-22 具有偏振片的触摸感测电极、包括其的显示装置及其制造方法

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR20140128592 2014-09-25
KR10-2014-0128592 2014-09-25
KR10-2015-0043560 2015-03-27
KR1020150043560A KR102207545B1 (ko) 2014-09-25 2015-03-27 편광판 일체형 터치 감지 전극 및 이를 포함하는 디스플레이 장치, 그리고 그 제조 방법

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WO2016047990A2 true WO2016047990A2 (fr) 2016-03-31
WO2016047990A3 WO2016047990A3 (fr) 2016-05-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106094321A (zh) * 2016-08-04 2016-11-09 武汉华星光电技术有限公司 一种液晶显示器
CN109917959A (zh) * 2019-02-28 2019-06-21 上海天马微电子有限公司 显示装置及其制作方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7479312B2 (en) * 2005-07-07 2009-01-20 Konica Minolta Opto, Inc. Retardation film, polarizing plate, and liquid crystal display device
US20120003400A1 (en) * 2009-02-13 2012-01-05 Nitto Denko Corporation Laminate optical body, optical film, liquid crystal display apparatus using said optical film, and method for producing laminate optical body
KR101713277B1 (ko) * 2010-08-13 2017-03-08 삼성전자주식회사 반사 방지 필름 및 상기 반사 방지 필름을 채용한 접이식 디스플레이 장치
JP5871615B2 (ja) * 2011-01-05 2016-03-01 富士フイルム株式会社 立体表示装置
KR102078831B1 (ko) * 2013-03-12 2020-04-03 삼성디스플레이 주식회사 플렉서블 터치 스크린 패널을 구비한 플렉서블 표시장치

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106094321A (zh) * 2016-08-04 2016-11-09 武汉华星光电技术有限公司 一种液晶显示器
CN109917959A (zh) * 2019-02-28 2019-06-21 上海天马微电子有限公司 显示装置及其制作方法
CN109917959B (zh) * 2019-02-28 2022-04-12 上海天马微电子有限公司 显示装置及其制作方法

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