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WO2001023951A1 - Cellule a cristal liquide multidomaine - Google Patents

Cellule a cristal liquide multidomaine Download PDF

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Publication number
WO2001023951A1
WO2001023951A1 PCT/US2000/026153 US0026153W WO0123951A1 WO 2001023951 A1 WO2001023951 A1 WO 2001023951A1 US 0026153 W US0026153 W US 0026153W WO 0123951 A1 WO0123951 A1 WO 0123951A1
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WO
WIPO (PCT)
Prior art keywords
alignment layer
liquid crystal
domain
optical state
crystal cell
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/US2000/026153
Other languages
English (en)
Inventor
Xin-Jiu Wang
Kai C. Su
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.)
Technology Resources International Corp
Original Assignee
Technology Resources International Corp
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 Technology Resources International Corp filed Critical Technology Resources International Corp
Priority to AU40249/01A priority Critical patent/AU4024901A/en
Publication of WO2001023951A1 publication Critical patent/WO2001023951A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/133753—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers with different alignment orientations or pretilt angles on a same surface, e.g. for grey scale or improved viewing angle
    • 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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • G02F1/13378—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation
    • G02F1/133788—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers by treatment of the surface, e.g. embossing, rubbing or light irradiation by light irradiation, e.g. linearly polarised light photo-polymerisation
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1393—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the birefringence of the liquid crystal being electrically controlled, e.g. ECB-, DAP-, HAN-, PI-LC 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
    • 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
    • G02F1/137—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
    • G02F1/139—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
    • G02F1/1396—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
    • G02F1/1397—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 characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell the twist being substantially higher than 90°, e.g. STN-, SBE-, OMI-LC 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
    • G02F2203/00—Function characteristic
    • G02F2203/34—Colour display without the use of colour mosaic filters

Definitions

  • the present invention relates to a liquid crystal cell for a liquid crystal display and, more specifically, to a liquid crystal cell having at least one multi-domain alignment layer, which can be used in a color liquid crystal display in which different pixels are capable of
  • Liquid crystals are materials that have a liquid crystal phase which exhibits flow
  • LCDs Liquid Crystal Displays
  • a fundamental element in a currently available LCD is a liquid crystal cell in which a
  • liquid crystal is sandwiched between two substrates made of, for example, transparent
  • a liquid crystal alignment layer is formed on each of the substrates.
  • the liquid crystal alignment layer is a thin film covering a surface of the substrate that is
  • tilt angle normally in the range of 0.5 to 15°, from the surface of the substrate.
  • orientation process can be a mechanical rubbing treatment, a photo-alignment, an oblique
  • pre-tilt angle is dependent on the composition of the alignment layer as well as processing parameters such as
  • orientation of the liquid crystal molecule may cause an asymmetrical
  • a liquid crystal cell may
  • the present invention provides a multi-domain liquid crystal cell that includes at least one alignment layer having a plurality of domains, each domain having an anchoring orientation different from each other, capable of aligning the liquid crystal molecules in different pre-tilt angles and thus widening the view angle.
  • the present invention also provides methods to make such multi-domain liquid crystal cell.
  • the present invention relates to a liquid crystal cell for a liquid crystal
  • a first alignment layer is formed on a surface
  • the first alignment layer has a first domain having a first anchoring
  • the first, second, and third anchoring orientations are
  • a second alignment layer is formed on a surface of the second
  • the first and second substrates are disposed parallel to each other with the first alignment layer and the second alignment
  • a liquid crystal is disposed
  • the liquid crystal has at least three regions: a first region having a first optical
  • the first region displaying a first color in the first optical state, a second region having a first optical state and a second optical state different from the first optical state, the first region displaying a first color in the first optical state, a second region having a first optical state and a second
  • the second region displaying a second color
  • the third region displaying a third color in the first
  • crystal is disposed so as to have its first region located between the first domain of the first
  • the liquid crystal cell for a liquid crystal display includes first
  • a first alignment layer is formed on a surface of the first substrate.
  • the first alignment layer includes a plurality of neighboring domains, where the total number of the domains is an integer m, m greater than two. Each domain has an anchoring
  • a second alignment layer is
  • the second alignment layer includes a plurality
  • the first and second substrates are disposed parallel to each other with the first alignment layer and the second alignment layer facing each other, thereby defining a
  • n and n are equal to three.
  • Yet another aspect of the invention is a method of constructing a liquid crystal cell for
  • a first and second substrates are coated with first and second
  • the first alignment layer is subjected to a first orientation
  • the first orientation making process includes the step of illuminating the first domain of the first alignment layer
  • first orientation making process also includes the step of illuminating the second domain of
  • the first alignment layer with a linearly polarized light having a second polarization direction
  • the first orientation making process further includes the step of
  • the second orientation making process includes a step of rubbing the second alignment layer in a fourth direction, so as to have the fourth anchoring orientation.
  • the second orientation making process includes a step of rubbing the second alignment layer in a fourth direction, so as to have the fourth anchoring orientation.
  • Yet another aspect of the invention is a method of constructing a liquid crystal cell for
  • the method includes a step of coating first and second
  • the alignment layer to a first orientation making process so that the first substrate has a pixel area divided into m domains, m being an integer greater than two, each domain having an
  • the second alignment layer to a second orientation making process so that the second substrate has a pixel area divided into n domains, n being an integer, each domain having an anchoring
  • FIG. 1 is a side schematic view of a liquid crystal cell of a first embodiment of the
  • FIGS. 2A and 2B are a top view of the first and second alignment layers of the liquid crystal cell shown in FIG. 1, demonstrating that the first alignment layer has three domains, each having a different anchoring orientation, as shown in FIG.
  • the second alignment layer has a uniform anchoring orientation, as
  • FIG. 3 is a side schematic view of a liquid crystal cell of a second embodiment of the
  • FIG. 4A and 4B are a top view of the first and second alignment layers of the liquid crystal cell shown in FIG. 3, demonstrating that the first alignment layer has three domains, each having a different anchoring orientation, as shown in FIG.
  • the second alignment layer also has three domains, each having a different anchoring orientation, as shown in FIG. 3B.
  • FIGS. 5A-5B are a top view of the first and second alignment layers that can be used in a liquid crystal cell according to a third embodiment of the present invention, demonstrating that the first alignment layer has multiple domains,
  • each having a different anchoring orientation as shown in FIG. 5A
  • the second alignment layer has multiple domains, each having a different anchoring orientation, as shown in FIG. 5B.
  • FIGS. 6A-6Y schematically show a configuration of a liquid crystal cell formed by
  • one embodiment of the invention is a liquid crystal cell 100.
  • liquid crystal cell 100 includes first and second substrates 10 and 20.
  • a liquid crystal layer is
  • FIG. 1 shows liquid crystal
  • liquid crystal layer is deposited with one of indium tin oxide (ITO) layers 12 and 22, which
  • the ITO layer is not a continuous layer, but actually a plurality of
  • ITO is used as the electrode in the embodiment
  • the display could employ an active matrix driver using, for example, a plurality
  • TFT thin film transistors
  • only one electrode layer is required to be transparent if the liquid crystal cell is
  • the ITO layer 12 is covered by an alignment layer 14 while the ITO layer 22 is
  • the alignment layer 14 includes three domains 14b, 14g, and 14r. These domains are divided by boundary lines 17, 19. Lines 17, 19 can be imaginary lines separating the
  • domains 14b, 14g, and 14r has an anchoring orientation different from each other. Namely,
  • domain 14b has an anchoring orientation 15b that defines an angle ⁇ with respect to a
  • domain 14g has an anchoring orientation 15g that defines an angle
  • domain 14r has an anchoring orientation
  • each of the angles can take any value in the range of 0 to 360°. The difference between two
  • neighboring angles i.e., ⁇ 2 - ⁇ , or ⁇ 3 - ⁇ 2 , can be different or same.
  • the alignment layer 24 has only one anchoring orientation
  • domain 14b of the alignment layer 14 has a pre-tilt
  • domain 14g of the alignment layer 14 has a pre-tilt angle 5
  • alignment layer 14 has a pre-tilt angle 7. These pre-tilt angles are formed because liquid crystal molecules 1 tend to orient themselves with molecular orientations on surfaces to which they are adjacent. In this embodiment, the pre-tilt angle 7 is greater than the pre-tilt angle 5 which itself is greater than the pre-tilt angle 3. Moreover, the alignment layer 24 has a uniform pre-tilt angle 3' because the alignment layer 24 has just one anchoring orientation.
  • each of the ITO layers 12, 22 includes three
  • FIG. 3 shows an alternative embodiment of FIG. 1.
  • alignment layer 324 has three domains 324b, 324g, and 324r. Each of the three domains 324b, 324g,
  • domain 324b has an anchoring orientation 325b that defines an angle ⁇ ,' with
  • domain 324g has an anchoring orientation 325g that
  • domain 324r has an
  • orientation angles ⁇ ,', ⁇ 2 ', and ⁇ 3 ' of the alignment layer 324 are shown in FIGS. 4A and 4B, orientation angles ⁇ ,', ⁇ 2 ', and ⁇ 3 ' of the alignment layer 324
  • the pre-tilt are corresponding to orientation angles ⁇ ,, ⁇ 2 , and ⁇ 3 of the alignment layer 314, respectively. However, they are not necessarily the same value. Thus, referring again to FIG. 3, the pre-tilt
  • angle 303 of the domain 314b of the alignment layer 314 can be different or same to the pre-
  • the pre-tilt angle 305 of the domain 314g of the alignment layer 314 can be different or same to the pre-tilt
  • domain 314r of the alignment layer 314 can be different or same to the pre-tilt angle 307' of the domain 324r of the alignment layer 324.
  • an alignment layer at most has three domains
  • each domain having a specific anchoring orientation.
  • An alignment layers indeed can have a
  • a liquid crystal cell includes a first alignment layer that can have m domains, m
  • n being an integer greater than two, and a second alignment layer that can have n domains, n
  • the anchoring orientations of any two neighboring domains in the first alignment layer can be the
  • neighboring domains in the first alignment layer is a constant in a particular embodiment, that constant can be 2 ⁇ /m, for example.
  • neighboring domains in the second alignment layer can be same or different. If the difference
  • layer is a constant in a particular embodiment, that constant can be 2 ⁇ /n.
  • the first alignment layer 514 has six domains 514a - 514f with corresponding
  • the second alignment layer 524 also has six domains 524a - 524f
  • first and second alignment layers do not have same number of domains as shown in the embodiment of FIG. 1.
  • the orientation shift for neighboring domains can be
  • Suitable materials for the substrate 10 or 310 include glass and other transparent materials
  • anisotropic solid could be used as well.
  • the substrate 20 or 320 it can be made from
  • Suitable materials for alignment layers are preferably photosensitive materials that
  • polymers such as polyimide, polyvinyl-cinnatemate, or polyvinyl 4-methoxy-
  • pre-polymers such as coumarin pre-polymer
  • cross-link polymers such as
  • the liquid crystal used in the present invention must be a material having a nematic
  • liquid crystal phase that exhibits at least a first optical state exhibiting birefringence when subjected to a first electrical field (including one having a zero field strength — a "field off
  • the second optical state could be any optical state, different from the first optical state, when subjected to a second electrical field, different from the first electrical field.
  • the second optical state could be any optical state, different from the first optical state, when subjected to a second electrical field, different from the first electrical field.
  • This liquid crystal has at least three regions: a first region having a first
  • the third region displaying a third
  • Each of the three colors is different from the other two colors.
  • Three colors can be red, green, and blue, or other colors such as magenta, yellow, and cyan.
  • the first liquid crystal region is a red liquid crystal region
  • the second liquid crystal region is a green liquid crystal region
  • the third liquid crystal region is a blue liquid crystal region.
  • the red liquid crystal region has a different twist orientation than that of green liquid crystal region and blue liquid crystal region.
  • the green liquid crystal region has a different twist orientation than that of red liquid crystal region and blue liquid crystal region.
  • the blue liquid crystal region has a different
  • geometrical thickness of the material and AH is the double refraction of the material.
  • FIG. 3 as an example, it is disposed so as to have its first or red region located between the
  • second alignment layer 324 its second or green region located between the domain 314g of the first alignment layer 314 and the corresponding domain 324g of the second alignment
  • liquid crystal molecules in each liquid crystal region have respective
  • the liquid crystal used in the present invention also includes a chiral dopant with a concentration that makes d/p ratio normally in the range of about 0.1% and about 1.0%, where d is the cell thickness and p is the helical pitch.
  • the chiral dopant could comprise S811 or CB15 (among others), both are preferred to practice the present invention. If S811 is
  • the concentration is about 0.1% when using a TN or SbTN embodiment and about 0.5% when using an STN or XSTN embodiment. If CB15 is used, the concentration may be about
  • the concentration may
  • an alignment layer 614 is coated on a top substrate 610 so as to overlay an ITO layer 612 (not shown) over the entire surface.
  • the coating can be done by either spin coating
  • the alignment layer 614 is
  • Such a compound could include a pre-polymer, a polymer, a cross-linkable polymer, a dye-doped polymer, or a
  • a first mask 61 lb is placed over the orientation surface 602 so as to cover the domains
  • the domain 614b is illuminated with a linearly polarized light 650 having a first
  • the light could be ultra-violet in the range of 300
  • the first polar orientation 652 is parallel (or could be perpendicular) to the anchoring orientation of the
  • the domain 614g of the alignment layer 614 is then illuminated with a linearly
  • the domain 614r of the alignment layer 614 is then illuminated with a linearly
  • FIG. 6F has a third molecular orientation 615r, as shown in FIG. 6F. As shown in FIG. 6F, this results in the alignment layer 614 having three domains 614b, 614g, and 614r with three anchoring orientations 615b, 615g, and 615r, respectively.
  • the first step would involve illuminating the
  • the photo-curable polymer could be a photo polymer available from Elsicon, Inc., Quillen Building, Suite ICl, 3521 Silverside Road, Wilmington,
  • the ITO layers could be applied using
  • a similar process can be repeated to provide a bottom substrate that has an alignment
  • a mechanical rubbing process can be used to provide a bottom substrate that has an alignment layer which has at
  • the mechanical rubbing process is known in the art.
  • the top substrate and the bottom substrate can then be assembled together with the
  • alignment layer is processed by photo-alignment or other process or a combination of them,
  • the formed liquid crystal cell can be called a hybrid liquid crystal cell.
  • a hybrid liquid crystal cell In general, according to
  • a hybrid liquid crystal cell relates to a liquid crystal cell that has a first alignment layer processed by a first orientation making process that includes mechanical
  • liquid crystal cell that has a top substrate with an
  • n is an integer greater than two and m is an integer.

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

Abstract

L'invention concerne un cellule à cristal liquide comprenant au moins une couche d'alignement présentant trois domaines (314), chacun ayant une orientation d'ancrage différente de celle utilisée dans un afficheur à cristaux liquides. La cellule à cristal liquide comprend des premier et second substrats, le premier est enduit d'une première couche d'alignement (314) présentant un premier domaine (314r) ayant une première orientation d'ancrage et un deuxième domaine ayant une deuxième orientation d'ancrage (314g) et un troisième domaine (314b) ayant une troisième orientation d'ancrage. Les trois orientations d'ancrage sont différentes les unes des autres. Le second substrat (320) est enduit d'une seconde couche d'alignement (324) de manière à suivre au moins une quatrième orientation d'ancrage. Les premier et second substrats sont parallèles, la première couche d'alignement faisant face à la seconde couche d'alignement, définissant ainsi une cavité intermédiaire. Le cristal liquide se trouve dans la cavité et présente trois zones dont les états optiques associés aux différentes couleurs diffèrent.
PCT/US2000/026153 1999-09-30 2000-09-21 Cellule a cristal liquide multidomaine Ceased WO2001023951A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU40249/01A AU4024901A (en) 1999-09-30 2000-09-21 Multi-domain liquid crystal cell

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US40860999A 1999-09-30 1999-09-30
US09/408,609 1999-09-30

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1300721A3 (fr) * 2001-10-02 2004-09-08 Sharp Kabushiki Kaisha Dispositif d'affichage à cristaux liquides
US7259818B2 (en) 2001-03-06 2007-08-21 Sharp Kabushiki Kaisha Nematic liquid crystal devices comprising surface protrusions formed of anisotropic material for nucleation of an active region
CN119322421A (zh) * 2024-10-23 2025-01-17 Tcl华星光电技术有限公司 显示面板及显示设备

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5909265A (en) * 1996-09-20 1999-06-01 Lg Electronics Inc. Method of fabricating a multi-domain liquid crystal cell
US5982464A (en) * 1998-12-16 1999-11-09 Technoloogy Resource International Corporation Multi-twist color liquid crystal display
US6141074A (en) * 1995-05-19 2000-10-31 Kent State University Four domain pixel for liquid crystalline light modulating device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6141074A (en) * 1995-05-19 2000-10-31 Kent State University Four domain pixel for liquid crystalline light modulating device
US5909265A (en) * 1996-09-20 1999-06-01 Lg Electronics Inc. Method of fabricating a multi-domain liquid crystal cell
US5982464A (en) * 1998-12-16 1999-11-09 Technoloogy Resource International Corporation Multi-twist color liquid crystal display

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7259818B2 (en) 2001-03-06 2007-08-21 Sharp Kabushiki Kaisha Nematic liquid crystal devices comprising surface protrusions formed of anisotropic material for nucleation of an active region
EP1300721A3 (fr) * 2001-10-02 2004-09-08 Sharp Kabushiki Kaisha Dispositif d'affichage à cristaux liquides
CN119322421A (zh) * 2024-10-23 2025-01-17 Tcl华星光电技术有限公司 显示面板及显示设备

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