WO2012165384A1 - Dispositif d'affichage - Google Patents

Dispositif d'affichage Download PDF

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Publication number
WO2012165384A1
WO2012165384A1 PCT/JP2012/063656 JP2012063656W WO2012165384A1 WO 2012165384 A1 WO2012165384 A1 WO 2012165384A1 JP 2012063656 W JP2012063656 W JP 2012063656W WO 2012165384 A1 WO2012165384 A1 WO 2012165384A1
Authority
WO
WIPO (PCT)
Prior art keywords
fluorescent dye
display device
light
dichroic
spacer
Prior art date
Application number
PCT/JP2012/063656
Other languages
English (en)
Japanese (ja)
Inventor
大輔 槻尾
康 浅岡
藤原　小百合
佐藤　英次
和広 出口
Original Assignee
シャープ株式会社
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 シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2012165384A1 publication Critical patent/WO2012165384A1/fr

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    • 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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
    • 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
    • G02F1/01—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 for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—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 for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • G02F1/1339—Gaskets; Spacers; Sealing of cells
    • 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
    • G02F2202/00—Materials and properties
    • G02F2202/04—Materials and properties dye
    • G02F2202/046—Materials and properties dye fluorescent

Definitions

  • the present invention relates to a display device using a fluorescent dye.
  • a display device disclosed below includes a pair of substrates, a light control layer sandwiched between the pair of substrates and configured to be switchable between a transparent state and a scattering state, and a spacer that regulates a gap between the pair of substrates. Is provided.
  • the spacer contains a fluorescent dye that absorbs light and emits fluorescence.
  • FIG. 1 is a cross-sectional view schematically showing a schematic configuration of a display device according to a first embodiment of the present invention.
  • FIG. 2A is a diagram schematically showing the state of absorption and emission of a fluorescent dye when the PNLC layer is in a transparent state.
  • FIG. 2B is a diagram schematically showing the state of absorption and emission of the fluorescent dye when the PNLC layer is in a scattering state.
  • FIG. 3 is a cross-sectional view schematically showing a schematic configuration of a display device according to the second embodiment of the present invention.
  • FIG. 4 is a cross-sectional view schematically showing a schematic configuration of a display device according to the third embodiment of the present invention.
  • FIG. 1 is a cross-sectional view schematically showing a schematic configuration of a display device according to a first embodiment of the present invention.
  • FIG. 2A is a diagram schematically showing the state of absorption and emission of a fluorescent dye when the PNLC layer is in a transparent state.
  • the light control layer may be controlled by a potential difference in one surface of the pair of substrates (a ninth configuration).
  • the photo spacer 40 includes a resist 41 and a fluorescent dye 42.
  • the fluorescent dye 42 is dispersed in the resist 41.
  • FIG. 1 is a diagram schematically showing that the fluorescent dye 42 is preferably uniformly distributed throughout the resist 41. However, in the present embodiment, it is not necessary to dissolve the fluorescent dye 42 in the resist 41 at the molecular level.
  • the PNLC layer 30 is in a transparent state.
  • the light incident on the display device 1 passes through the PNLC layer 30 as indicated by arrows A1 and A2 in FIG. Therefore, only the light directly incident on the fluorescent dye 42 is absorbed by the fluorescent dye 42 as indicated by an arrow A3 in FIG. 2A.
  • the refractive index of the PNLC layer 30 is larger than the refractive indexes of the active matrix substrate 10 and the counter substrate 20
  • light incident from the PNLC layer 30 to the active matrix substrate 10 or the counter substrate 20 at an incident angle greater than the critical angle is Total reflection at the interface.
  • most of the light emitted from the fluorescent dye 42 is confined in the PNLC layer 30 as indicated by an arrow A5.
  • the light incident on the counter substrate 20 at an angle shallower than the critical angle is extracted to the outside as indicated by an arrow A4.
  • the light emitted from the fluorescent dye 42 is also scattered by the PNLC layer 30.
  • the light as indicated by the arrow A9 incident on the counter substrate 20 at an angle shallower than the critical angle the light as indicated by the arrow A10 that is confined in the PNLC layer 30 in the transparent state is also extracted to the outside.
  • the array layer 12 is formed on the insulating substrate 11 to produce the active matrix substrate 10.
  • a glass substrate is used as the insulating substrate 11.
  • the array layer 12 includes, for example, a molybdenum alloy film as a gate electrode / signal line, a silicon nitride film as a gate insulating film, an amorphous silicon film as a semiconductor film, and an aluminum alloy film as a source electrode / signal line.
  • An ITO (Indium Tin Oxide) film is formed as an electrode, and a silicon nitride film is formed as a protective film in this order.
  • the alloy film and the ITO film are formed by sputtering.
  • the silicon nitride film and the amorphous silicon film are formed by CVD (Chemical Vapor Deposition).
  • the array layer 12 is manufactured by repeating film formation and pattern formation by photolithography.
  • the resist 41 and the fluorescent dye 42 are mixed. It is preferable that the fluorescent dye 42 is sufficiently dispersed in the resist 41. However, in this embodiment, it is not necessary to dissolve the fluorescent dye 42 in the resist 41 at the molecular level.
  • a seal pattern is formed on the counter substrate 20 with a seal resin.
  • a mixed composition such as a monomer or oligomer of the polymer matrix 31, liquid crystal molecules 32a, and a polymerization initiator is prepared and dropped into the seal pattern.
  • the polymer matrix 31 for example, an ultraviolet curable resin can be used.
  • the active matrix substrate 10 and the counter substrate 20 are superposed in a vacuum. In the state where the mixed composition spreads in the seal pattern, ultraviolet irradiation is performed to form the PNLC layer 30.
  • the photospacer 40 includes a resist 41 and a dichroic fluorescent dye 43.
  • the dichroic fluorescent dye 43 is oriented in the thickness direction of the PNLC layer 30 and dispersed in the photo spacer 40. More specifically, the dichroic fluorescent dye 43 is oriented so that the molecular long axis is parallel to the thickness direction of the PNLC layer 30.
  • FIG. 4 is a diagram schematically showing the same as FIG. 1, and it is preferable that the dichroic fluorescent dye 43 is evenly dispersed throughout the resist 41.
  • FIG. 6A is a diagram schematically showing how the dichroic fluorescent dye 43 absorbs and emits light when the PNLC layer 30 is in a transparent state.
  • FIG. 6B is a diagram schematically illustrating how the fluorescent dye 43 absorbs and emits light when the PNLC layer 30 is in a scattering state.
  • the display device 3 when the PNLC layer 30 is in a transparent state, the amount of light absorbed by the dichroic fluorescent dye 43 and the display from the dichroic fluorescent dye 43 are displayed. The amount of light extracted outside the device 3 is smaller than that of the display device 1. Further, when the PNLC layer 30 is in a scattering state, the amount of light absorbed by the dichroic fluorescent dye 43 and the amount of light extracted from the dichroic fluorescent dye 43 to the outside of the display device 3 are determined by the display device. More than one. Therefore, the contrast can be increased.
  • the dichroic fluorescent dye 43 and the liquid crystal polymer are sufficiently mixed to prepare a mixed composition.
  • This mixed composition is uniformly applied on the counter electrode 22 of the counter substrate 20 by a slit coater or a spin coater. Thereafter, pre-baking (pre-baking), exposure, development, post-baking (post-baking), and the like are performed to form the photo spacers 40 at predetermined locations. Note that the photo spacer 40 may be formed on the active matrix substrate 10.
  • the dichroic fluorescent dye 33 behaves in parallel with the liquid crystal molecules 32a. More specifically, the molecular long axis of the dichroic fluorescent dye 33 and the molecular long axis of the liquid crystal molecules 32a behave in parallel. Therefore, the dichroic fluorescent dye 33 can be controlled by electrically controlling the liquid crystal molecules 32a.
  • the dichroic fluorescent dye 33 when the PNLC layer 30 is in a transparent state, that is, when the molecular long axis of the liquid crystal molecules 32a is aligned in the thickness direction of the PNLC layer 30, the dichroic fluorescent dye 33 is also aligned in this direction. To do. Since the transition moment of absorption of the dichroic fluorescent dye 33 is also directed substantially in the same direction, the dichroic fluorescent dye 33 hardly absorbs light incident in this direction.
  • a darker color can be obtained as compared with the case where the fluorescent dye 42 exists only in the photo spacer 40 (in the case of the first embodiment).
  • dichroic fluorescent dye 43 contained in the photospacer 40 and the dichroic fluorescent dye 33 contained in the PNLC layer 30 may be the same compound or different compounds. good.
  • the display device 6 can perform brighter display.
  • the photo spacer 40a includes a resist 41 and a fluorescent dye 42a.
  • the photo spacer 40b includes a resist 41 and a fluorescent dye 42b that emits light having a wavelength different from that of the fluorescent dye 42a.
  • the photospacer 40c includes a resist 41 and a fluorescent dye 42c that emits light having a wavelength different from that of the fluorescent dye 42a and the fluorescent dye 42b.
  • fluorescent dyes that emit red, green, and blue light can be used as the fluorescent dyes 42a, 42b, and 42c, respectively. However, it is not limited to such three primary colors.
  • the photo spacers 40a, 40b, and 40c can also be formed by an ink jet method. Specifically, first, a mixed composition of the resist 41 and the fluorescent dye 40a is applied to a predetermined location on the counter substrate 20 by inkjet. Thereafter, the solvent is dried, cured, post-baked, and the like to form the photospacer 40a. Thereafter, this process is repeated to form the photo spacers 40b and 40c.
  • the photo spacers 40a, 40b, and 40c may be formed on the active matrix substrate 10.
  • fluorescent dyes 42a, 42b, and 42c are used, but the number of fluorescent dyes to be used may be two or four or more. Further, dichroic fluorescent dyes oriented in the thickness direction of the PNLC layer 30 may be used as the fluorescent dyes 42a, 42b, and 42c.
  • FIG. 11 is sectional drawing which shows typically schematic structure of the display apparatus 8 concerning the 8th Embodiment of this invention.
  • the display device 8 is different from the display device 7 according to the seventh embodiment in the configuration of the photo spacers 40a, 40b, and 40c and the PNLC layer 30.
  • the PNLC layer 30 further includes a dichroic fluorescent dye 33 in addition to the polymer matrix 31 and the liquid crystal droplets 32.
  • the dichroic fluorescent dye 33 does not exist so much in the polymer matrix 31 and exists mainly in the liquid crystal droplets 32.
  • the dichroic fluorescent dye 43 oriented in the thickness direction of the PNLC layer 30 may be included in the photo spacer 40 instead of the fluorescent dye 42.
  • spacer beads 50 may be used instead of the photo spacers 40.
  • the PNLC layer 30 may contain a dichroic fluorescent dye 33.

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  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Nonlinear Science (AREA)
  • Dispersion Chemistry (AREA)
  • Mathematical Physics (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Liquid Crystal (AREA)

Abstract

L'invention concerne une constitution d'un dispositif d'affichage qui peut obtenir une émission suffisante de lumière fluorescente sans rendre épaisse une couche d'ajustement de lumière et sans affecter les caractéristiques de la couche d'ajustement de lumière. Un dispositif d'affichage (1) comporte une paire de substrats (10, 20), une couche d'ajustement de lumière (30) prise en sandwich entre la paire de substrats (10, 20) et constituée afin d'être commutable entre un état transparent et un état de diffusion et des espaceurs (40) qui régulent l'espacement entre la paire de substrats (10, 20). Les espaceurs (40) contiennent un colorant fluorescent (42) qui absorbe la lumière et émet de la lumière fluorescente.
PCT/JP2012/063656 2011-06-03 2012-05-28 Dispositif d'affichage WO2012165384A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2011-125615 2011-06-03
JP2011125615A JP2014149319A (ja) 2011-06-03 2011-06-03 表示装置

Publications (1)

Publication Number Publication Date
WO2012165384A1 true WO2012165384A1 (fr) 2012-12-06

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PCT/JP2012/063656 WO2012165384A1 (fr) 2011-06-03 2012-05-28 Dispositif d'affichage

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WO (1) WO2012165384A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6213653B2 (ja) 2015-11-13 2017-10-18 大日本印刷株式会社 調光フィルム及び合わせガラス

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05142530A (ja) * 1991-11-18 1993-06-11 Ricoh Co Ltd カラー液晶表示素子
JP2003215601A (ja) * 2002-01-23 2003-07-30 Canon Inc 液晶表示装置の検査方法及び製造方法
JP2005134504A (ja) * 2003-10-29 2005-05-26 Sony Corp 液晶表示素子及びその製造方法
JP2005321494A (ja) * 2004-05-07 2005-11-17 Toppan Printing Co Ltd 液晶表示装置用カラーフィルタの検査方法
WO2010103589A1 (fr) * 2009-03-13 2010-09-16 シャープ株式会社 Dispositif d'affichage à cristaux liquides et son procédé de fabrication

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05142530A (ja) * 1991-11-18 1993-06-11 Ricoh Co Ltd カラー液晶表示素子
JP2003215601A (ja) * 2002-01-23 2003-07-30 Canon Inc 液晶表示装置の検査方法及び製造方法
JP2005134504A (ja) * 2003-10-29 2005-05-26 Sony Corp 液晶表示素子及びその製造方法
JP2005321494A (ja) * 2004-05-07 2005-11-17 Toppan Printing Co Ltd 液晶表示装置用カラーフィルタの検査方法
WO2010103589A1 (fr) * 2009-03-13 2010-09-16 シャープ株式会社 Dispositif d'affichage à cristaux liquides et son procédé de fabrication

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