WO2002003131A1 - Procede et dispositif d'affichage a cristaux liquides, et appareil de fabrication d'affichage a cristaux liquides - Google Patents

Procede et dispositif d'affichage a cristaux liquides, et appareil de fabrication d'affichage a cristaux liquides Download PDF

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Publication number
WO2002003131A1
WO2002003131A1 PCT/JP2001/005433 JP0105433W WO0203131A1 WO 2002003131 A1 WO2002003131 A1 WO 2002003131A1 JP 0105433 W JP0105433 W JP 0105433W WO 0203131 A1 WO0203131 A1 WO 0203131A1
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WIPO (PCT)
Prior art keywords
liquid crystal
layer
alignment
forming
substrate
Prior art date
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PCT/JP2001/005433
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English (en)
Japanese (ja)
Inventor
Ken Sumiyoshi
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Nec Corporation
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Publication of WO2002003131A1 publication Critical patent/WO2002003131A1/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
    • G02F1/1337—Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
    • 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
    • G02F1/133377—Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
    • 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
    • G02F1/13394—Gaskets; Spacers; Sealing of cells spacers regularly patterned on the cell subtrate, e.g. walls, pillars
    • 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
    • G02F1/141—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 using ferroelectric liquid crystals

Definitions

  • the present invention relates to a liquid crystal display method, a liquid crystal display device, and an apparatus for manufacturing the same.
  • LCDs Liquid crystal displays
  • LCDs Liquid crystal displays
  • viewing angle dependency and response speed can be cited as major issues in LCD display performance.
  • the viewing angle dependency is being improved by various devices, but the response speed has not yet been drastically solved.
  • an orientation film 10 After forming 2 an alignment process is performed. Further, the partition wall 103 is formed on the surface of the one substrate 101 by using a photosensitive resin or the like. After that, the upper and lower substrates are also overlapped, and the upper and lower substrates 101 are attached by the adhesive force of the partitions 103. At this time, the upper and lower substrates 101 may be attached through the partitions 103. is important. Thereafter, Sm liquid crystal is injected. Further, an alignment process is performed using a temperature gradient. The state of the alignment treatment is shown in FIG. FIG. 20 is a side view of FIG. 19 rotated 90 degrees and viewed from the side of the partition wall.
  • the liquid crystal panel is kept in a thermostat as shown in Fig. 20.
  • I phase isotropic phase
  • N phase nematic phase
  • SmA phase nematic phase
  • 'SmC phase the liquid crystal panel is kept in a thermostat as shown in Fig. 20.
  • the phase distribution shown in FIG. 20 is obtained.
  • the N phase the liquid crystal molecules 104 are oriented in the orientation direction of the upper and lower substrates 101.
  • SmA phase a layer structure unique to smectic liquid crystals is formed. This layer direction substantially matches the orientation direction of the upper and lower substrates.
  • the transition from the S m A phase to the S m C phase is shown in FIG.
  • the layer ivy Shuburon structure results Oremaga.
  • the bending direction of this chevron structure can be selected from two, but if it has two bending directions, only a low contrast ratio of about 60 can be obtained. On the other hand, if the bending direction can be controlled in one direction, a high contrast ratio can be achieved. In the temperature gradient method of FIG.
  • a high contrast ratio can be obtained by bonding the upper and lower substrates to confine the liquid crystal layer in a narrow flow path and applying a temperature gradient.
  • the problem is that, as shown in FIG. 20, since the partition walls 103 must be formed on the alignment film 102, one photolithography step must be performed on the alignment film. In this step, a photosensitive resin film that can be applied on the alignment film is formed, exposed by a mask, and developed. Therefore, the alignment film is exposed to the developer. Such a developer is usually an alkaline solution, and damages the alignment film surface. Furthermore, even if the photosensitive resin is removed by exposure and development, it is almost impossible to completely remove the applied photosensitive resin. Therefore, as shown in FIG. 23, it is customary that a residue 106 of the photosensitive resin remains on the surface of the alignment film 102.
  • the second problem is that, as shown in Fig. 24, the liquid crystal injection is performed after the upper and lower substrates are bonded through the alignment film, alignment processing, and partition wall formation as described above, and the temperature gradient processing as described above is performed. .
  • the above-described structure assumes an orientation state as shown in FIG. That is, unlike the surface of the alignment film, the surface of the partition wall is not subjected to the alignment treatment. For this reason, an alignment degradation portion 107 in which the liquid crystal alignment in contact with a part of the partition wall surface is defective is generated. Such a defective portion 107 usually increases as time passes.
  • An object of the present invention is to provide a liquid crystal display method, a liquid crystal display device, and a device for manufacturing the same, in which no residue of the photosensitive resin remains on the surface of the alignment film.
  • Another object of the present invention is to provide a liquid crystal display method, a liquid crystal display device, and an apparatus for manufacturing the same, in which the liquid crystal alignment in contact with a part of the partition wall surface does not become defective.
  • Still another object of the present invention is to provide a liquid crystal display method in which no residue of the photosensitive resin remains on the surface of the alignment film and the liquid crystal alignment in contact with a part of the partition wall surface does not become defective.
  • the liquid crystal display device includes a first substrate (1), a second substrate (6), a partition (2) formed on the first substrate (1), and a first alignment layer covering the partition (2). (3 or 4, or 3 and 4, hereinafter simply referred to as 3, 4) and a second alignment layer (7, 8) formed on the second substrate (6), and the first alignment
  • the layers (3, 4) and the second alignment layer (7, 8) are coupled to face each other, and the liquid crystal layer (31) is connected to the first alignment layer (3, 4) and the second alignment layer (7, 8).
  • Formed between The alignment layers on both sides are bonded to each other, and the partition (2) is covered with the alignment layer, and the surface of the alignment layer is formed smoothly along the smooth surface of the partition (2).
  • the orientation of the liquid crystal layer (31) is controlled and regulated to a high degree of orientation.
  • the first substrate (1) is covered with a first alignment layer (3, 4), and the second substrate (6) is covered with a second alignment layer (7, 8).
  • the surface of the first alignment layer (3, 4) is formed on the uneven surface along the partition (2) and the first substrate (1), while the surface of the second alignment layer is along the second substrate (6). It can be formed in a plane.
  • the surface of the second alignment layer can also be formed on the uneven surface along the partition (2 'in FIG. 9) and the second substrate (6).
  • the first alignment layer (3, 4) preferably includes a first alignment film (3) and a first liquid crystal layer (4) formed on the surface of the first alignment film (3).
  • the degree of alignment of the first liquid crystal layer (4) formed on the surface side of the first alignment film (3) is higher than the degree of alignment of the first alignment film (3).
  • the second alignment layer (7, 8) also has a second alignment film (7) and a second liquid crystal formed on the surface side of the second alignment film (7). And a layer (8).
  • the first liquid crystal layer (4) and the second liquid crystal layer (8) are directly Join and join together.
  • the first liquid crystal layer (4) and the second liquid crystal layer (8) are both formed of a photosensitive liquid crystal monomer, are photo-cured, and are directly joined.
  • the first liquid crystal layer (4) and the second liquid crystal layer (8) can both be formed of a polymer liquid crystal. It is preferable that the first alignment layer (3, 4) is not parallel to the longitudinal direction of the partition walls, but is inclined by about several degrees with respect to the longitudinal direction of the partition walls. Second alignment layer (7,
  • the first alignment layer (3, 4) includes a first alignment film (3) and a first liquid crystal layer (4) formed on the surface side of the first alignment film (3).
  • the alignment direction of 3) and the alignment direction of the first liquid crystal layer (4) are almost the same.
  • the first liquid crystal layer (4) is formed in a smectic liquid crystal phase.
  • the first liquid crystal layer (4) can also be formed in a phase having a spontaneous polarization.
  • the liquid crystal display method comprises: forming a first partition (2) on a first substrate (1); forming a first alignment film (3) on the first partition (2); Subjecting the first and second alignment films (3, 4) to an alignment treatment, forming a second alignment film (7) on the second substrate (6) and subjecting the second alignment film (7) to an alignment treatment; ) And bonding the second alignment film (7).
  • the first alignment film (4) and the second alignment film (8) are formed of a photosensitive liquid crystal layer, and the bonding is that the photosensitive liquid crystal layer is photo-cured.
  • the physical properties of the photosensitive liquid crystal layer are used for bonding.
  • the photo-curing of the photosensitive liquid crystal layer (4, 8) through the first substrate (1) can simplify the joining process.
  • the photosensitive liquid crystal layer is a photosensitive liquid crystal monomer layer, and it is preferable that the photosensitive liquid crystal monomer layer be cured in a nematic phase or a smectic A phase from the viewpoint of simplifying a bonding step.
  • the first alignment film (4) and the second alignment film (8) are formed of a polymer liquid crystal layer, and the junction is that the polymer liquid crystal layer is cured by heating.
  • the physical properties of the polymer liquid crystal layer are used for bonding. Also in this case, the polymer resin layer is cured in the nematic phase or the smectic A phase.
  • Forming the first alignment film on the first partition (2) is equivalent to forming the first alignment film on the partition (2).
  • the layer and the second photosensitive liquid crystal layer are photocured and directly joined.
  • the partition structure is not necessarily required for the second substrate (6).
  • the method further includes forming a second partition (2 ′) on the second substrate (6), and forming the second alignment film on the second substrate (6) includes forming the second partition on the second partition (2 ′).
  • Forming the alignment film (7, 8) is to form the second alignment film on the second partition (6), and forming the second alignment layer (3 ') on the second partition (2'). And forming a second photosensitive liquid crystal layer (4 ') on the second alignment layer (3'), wherein the first photosensitive liquid crystal layer (4) and the second photosensitive liquid crystal layer (4 ') are formed.
  • Forming the first alignment film on the first partition (2) includes forming the first alignment layer (3) on the first partition (2) and forming the first polymer liquid crystal on the first alignment layer (3).
  • the method further includes forming a second partition (2 ') on the second substrate (6), and forming the second alignment film on the second substrate (6) includes forming a second partition on the second partition (2').
  • Forming a second alignment film on the second partition (2 ') includes forming a second alignment layer (3') on the second partition (2 '); 2) forming a second polymer liquid crystal layer (4 ') on the alignment layer (3').
  • the first polymer liquid crystal layer (4) and the second polymer liquid crystal layer (4 ') are directly joined by heating.
  • Forming the first alignment film on the first partition (2) includes forming the first alignment layer (3) on the first partition (2) and forming the photosensitive liquid crystal layer (3) on the first alignment layer (3).
  • Forming a second alignment film on the second substrate (6). May form a polymer liquid crystal layer (4 ') on the second substrate (6).
  • the photosensitive liquid crystal layer (4) and the polymer liquid crystal layer (8) are photocured and directly joined, and this joining is possible and effective.
  • Forming the first alignment film on the first partition (2) includes forming the first alignment layer (3) on the first partition (2) and forming a photosensitive liquid crystal layer on the first alignment layer (3).
  • Forming the first alignment film on the first partition (2) includes forming the first alignment layer (3) on the first partition (2) and forming a polymer liquid crystal layer (3) on the first alignment layer (3).
  • Forming the first alignment film on the first partition (2) includes forming the first alignment layer (3) on the first partition (2) and forming a polymer liquid crystal layer on the first alignment layer (3).
  • An apparatus for manufacturing a liquid crystal display device according to the present invention covers a first substrate (2), a second substrate (6), a partition (2) formed on the first substrate (1), and a partition (2).
  • a position mechanism for positioning the first substrate (1) and the second substrate (6) is added.
  • FIG. 3 is a cross-sectional view showing a known joint.
  • 4 (a) and 4 (b) are cross-sectional views showing polarized light of ultraviolet light.
  • FIG. 5 is a cross-sectional view showing the irradiation direction of ultraviolet rays.
  • FIG. 6 is an axial projection view showing the orientation direction.
  • FIG. 7 is a cross-sectional view showing an embodiment of the apparatus for manufacturing a liquid crystal display device according to the present invention.
  • FIG. 8 is a sectional view showing another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 9 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 10 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 11 is an axial projection diagram showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIGS. 12 (a), (b), (c) and (d) are cross-sectional views showing still another embodiment of the liquid crystal display method according to the present invention.
  • FIG. 13 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 14 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 15 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 16 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 17 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 18 is a sectional view showing still another embodiment of the liquid crystal display device according to the present invention.
  • FIG. 19 is a cross-sectional view showing a known device.
  • FIG. 20 is a sectional view showing the relationship between the liquid crystal phase and the temperature gradient.
  • FIG. 21 is an axial projection view showing the relationship between the temperature of the liquid crystal phase and the deformation of the liquid crystal layer.
  • FIG. 22 is a cross-sectional view showing a rubbing process.
  • FIG. 23 is a cross-sectional view showing a state of the known device.
  • FIG. 24 is a cross-sectional view showing another state of the known device. BEST MODE FOR CARRYING OUT THE INVENTION
  • a partition is formed on the upper surface of the substrate.
  • the partition 2 is formed on the upper surface of the first substrate 1 by a photolithography process or the like.
  • a first alignment film 3 is formed on the upper surfaces of the first substrate 1 and the partition 2, and an alignment process is performed.
  • This alignment treatment can be performed by a rubbing method, or by irradiation with linearly polarized ultraviolet light. As a result of this alignment treatment, the alignment direction of the alignment film on the upper surface of the partition 2 and the upper surface of the first substrate 1 is defined.
  • the first photosensitive liquid crystal monomer layer 4 is formed. Formed on the upper surface of the first alignment film 3, a first alignment layer forming substrate 5A is formed. At this time, it may be necessary to heat the photosensitive liquid crystal monomer to a nematic phase or a smectic phase.
  • the photosensitive liquid crystal monomer layer 4 that has undergone such processing is aligned in the alignment direction of the first alignment film 3. The degree of alignment on the surface of the photosensitive liquid crystal monomer layer 4 thus aligned is higher than the degree of alignment on the surface of the first alignment film 3.
  • FIG. 2 shows that the degree of alignment on the surface of the first photosensitive liquid crystal monomer layer 4 is higher than the degree of alignment on the surface of the first alignment film 3.
  • the degree of orientation of the surface of the first alignment film 3 that has been subjected to the alignment treatment is relatively low. Therefore, even if a smectic C layer is formed on the upper surface of the first alignment film 3, a favorable alignment state cannot be obtained.
  • FIG. 2 when a liquid crystal phase is formed on the surface of the first alignment film 3 that has been subjected to the alignment treatment, if the liquid crystal phase is in a nematic phase or a smectic A phase, the outermost surface of the liquid crystal phase is formed. The degree of orientation is improved. This is because, even when the liquid crystal phase is in contact with the surface of the alignment film having a poor degree of orientation, the liquid crystal phase itself is aligned, and the degree of orientation on the outermost surface is improved. Therefore, Figure 2
  • the degree of orientation of the outermost surface of each layer shown in (a), (b), and (c) depends on the orientation of layer 3 shown in FIG. 2 (a) where the first photosensitive liquid crystal monomer layer 4 is not formed.
  • Figure 2 shows that the first photosensitive liquid crystal monomer layer 4 is formed thin.
  • the orientation degree of the layer 3 shown in FIG. 2B which is lower than the orientation degree of the layer 4 shown in FIG.
  • the degree of orientation of the layer 4 shown in FIG. 2 (c), in which the monomer layer 4 is formed thick is lower.
  • a liquid crystal phase having such a high degree of orientation is provided with photosensitivity in advance, and photo-cured, whereby it can be used as an alignment film having a good degree of orientation.
  • the second alignment film was formed as shown in FIG. 1 (d).
  • a substrate 5B is formed.
  • the second alignment film-forming substrate 5B does not have the partition walls 2 formed on the first alignment layer-forming substrate 5A.
  • the second alignment film forming substrate 5B is composed of the second substrate 6 and the second It comprises a second alignment film 7 formed on the upper surface (surface) of the substrate 6 and a second photosensitive liquid crystal monomer layer 8 formed on the upper surface (surface) of the second alignment film 7.
  • the first alignment film 3 of the first alignment layer forming substrate 5A and the first photosensitive liquid crystal monomer layer 4 have an uneven surface, but the second alignment film of the second alignment film forming substrate 5B. 7 and the second photosensitive liquid crystal monomer layer 8 of the second alignment film forming substrate 5B have their surfaces formed flat.
  • the first alignment layer forming substrate 5A and the second alignment film forming substrate 5B are overlapped as shown in FIG. 1 (d). If the first photosensitive liquid crystal monomer layer 4 and the second photosensitive liquid crystal monomer layer 8 are mixed with a polymerization initiator that is sensitive to light passing through the substrates 1 and 6, then exposure is performed through the substrate and both photosensitive layers are exposed. Liquid crystal monomer — layers 4 and 8 can be cured.
  • both photosensitive by hardening of the liquid crystal monomer layer 4, 8, the substrates 1, 6 as shown in t Figure 3 it is possible to adhere the alignment film 2 0 simply over the partition 2 0 1 Even if 2 is formed and the two substrates 203 and 204 are overlapped, stable adhesion between the upper and lower substrates cannot be obtained because the adhesion between the alignment films is weak.
  • the substrates 5A and 5B are firmly adhered to each other.
  • the degree of orientation of the upper and lower surfaces of both substrates in contact with the liquid crystal layer is improved.
  • the side surface of the partition 2 is also covered with the first photosensitive liquid crystal monomer layer 4, the alignment direction is also defined on the side surface of the partition 2.
  • applying linearly polarized ultraviolet light to the surface of the alignment film is effective for imparting an alignment direction to the side wall of the partition wall.
  • the alignment direction can be set to the longitudinal direction of the partition wall.
  • the alignment film on the side wall of the partition wall is also exposed to ultraviolet rays. It has an orientation direction.
  • the irradiation shown in FIG. 5 is preferably irradiation with ultraviolet light that is performed a plurality of times while changing the angle.
  • FIG. 6 it is possible to obtain a substrate in which the molecular chains 11 effective for the liquid crystal alignment are arranged substantially in the longitudinal direction of the partition wall.
  • the above-described steps can be performed by the apparatus shown in FIG. That is, the first alignment layer forming substrate 5A and the second alignment film forming substrate 5B shown in FIG. 1 (d) are placed in the apparatus shown in FIG. After the substrates 5A and 5B are overlaid, the substrates 5A and 5B are pressurized by the pressurizing mechanism 21 and the cell gap is adjusted. Thereafter, the photosensitive liquid crystal monomer layers 4 and 8 are photo-cured by the ultraviolet light output from the light irradiation device 22. At this time, it is important that the two substrates 5A and 5B are not exposed to oxygen in the atmosphere by the oxygen blocking tank 23. This is to prevent the photocuring of the photosensitive liquid crystal monomers 4 and 8 from being inhibited by oxygen in the atmosphere.
  • Fig. 1 When laminating the TFT substrate and the color filter substrate, pixel alignment of both substrates 5A and 5B is required. In this case, it is also possible to add an alignment mechanism for both substrates 5A and 5B to the apparatus shown in FIG. It is clear that the structure obtained by Fig. 1 can be replaced by the structures of Figs. The above structure can be easily created by changing the type of film formation on the upper substrate and the lower substrate. In either case, the liquid crystal layer is surrounded by the upper and lower substrates and the side walls of the partition, and the upper and lower substrates and the side surfaces of the partition are covered with an alignment film or a liquid crystal substance.
  • the orientation direction and the layer direction of the smectic layer 31 deviate by several degrees.
  • the smectic layer can be stably formed in the longitudinal direction of the partition wall by shifting the orientation direction by several degrees from the longitudinal direction of the partition wall.
  • FIG. 12 shows another embodiment of the liquid crystal display device according to the present invention.
  • a partition 2 is formed on a first substrate 1.
  • an alignment film 3 is formed and an alignment process is performed.
  • a polymer liquid crystal layer 41 is formed.
  • an orientation film is formed on the first substrate 1 and an orientation process is performed.
  • the two substrates 5A 'and 5b' are superposed and heated.
  • the heating temperature is desirably equal to or higher than the glass transition temperature of the polymer liquid crystal. It is also desirable that the polymer liquid crystal phase experience a nematic liquid crystal phase or a smectic A liquid crystal phase.
  • the upper and lower substrates are bonded.
  • Polymer liquid crystal layer in the structure created in the above manner t aligned in the alignment treatment direction of the alignment film liquid crystal is injected.
  • the injected liquid crystal is oriented under the influence of the polymer liquid crystal layer 41 on the first substrate 1 and the alignment film 3 on the substrate 6.
  • the above-mentioned temperature gradient treatment is performed after the injection is completed. Thereby, a high contrast ratio can be obtained.
  • Figs. 13, 14, and 15 Similar structures can be illustrated in Figs. 13, 14, and 15. These structures can be easily created by changing the film formation on the upper and lower substrates in Fig. 12. It is possible. In either case, the liquid crystal layer is surrounded by the upper and lower substrates and the side walls of the partition, and the upper and lower substrates and the side surfaces of the partition are covered with an alignment film or a liquid crystalline substance.
  • the liquid crystal display method, the liquid crystal display device, and the apparatus for manufacturing the liquid crystal display device according to the present invention can stably obtain oriented liquid crystals, particularly, oriented smectic C liquid crystals. As a result, a high contrast ratio can be realized.
  • the present invention is being widely used for applications that make use of the characteristics of its thinness, and in particular, has been widely used as a display device for a personal computer. is expected.

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  • Physics & Mathematics (AREA)
  • Liquid Crystal (AREA)
  • Nonlinear Science (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Mathematical Physics (AREA)
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  • Optics & Photonics (AREA)

Abstract

La présente invention concerne un dispositif d'affichage à cristaux liquides comportant un premier substrat (1), un second substrat (6), des parois de séparation (2) formées sur le premier substrat (1), des premières couches d'orientation (3, 4) recouvrant les parois de séparation (2), et des secondes couches d'orientation (7,8) formées sur le second substrat. Les premières couches d'orientation (3, 4) sont reliées face aux secondes couches d'orientation (7, 8). Une couche de cristaux liquides (31) est formée entre les premières couches d'orientation (3, 4) et les secondes couches d'orientation (7, 8). L'orientation de la couche de cristaux liquides (31) est contrôlée et spécifiée par les premières couches d'orientation (3, 4). Les surfaces des premières couches d'orientation (3, 4) sont tantôt enfoncées tantôt saillantes le long des parois de séparation (2) et du premier substrat (1). Les cristaux liquides qui sont contrôlés et spécifiés par les premières couches d'orientation (3, 4), sont orientés selon un degré élevé d'orientation de manière à ne laisser aucune trace de résidus sur les parois de séparation, permettant ainsi d'augmenter le rapport de contraste.
PCT/JP2001/005433 2000-07-04 2001-06-26 Procede et dispositif d'affichage a cristaux liquides, et appareil de fabrication d'affichage a cristaux liquides WO2002003131A1 (fr)

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JP2000-202538 2000-07-04
JP2000202538A JP2002023164A (ja) 2000-07-04 2000-07-04 液晶表示方法、液晶表示装置、及び、それの製造装置

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WO2002003131A1 true WO2002003131A1 (fr) 2002-01-10

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JP2005258429A (ja) * 2004-02-10 2005-09-22 Dainippon Printing Co Ltd 液晶表示素子
WO2006123791A1 (fr) * 2005-05-19 2006-11-23 Dai Nippon Printing Co., Ltd. Dispositif d’affichage a cristaux liquides et procede de fabrication d’un dispositif d’affichage a cristaux liquides
JP2006323214A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子
JP2006323215A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2006323222A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2007011069A (ja) * 2005-06-30 2007-01-18 Lg Phillips Lcd Co Ltd 液晶表示素子及びその製造方法
JP2007057817A (ja) * 2005-08-24 2007-03-08 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
US7362404B2 (en) 2004-03-31 2008-04-22 Fujitsu Limited Liquid crystal display device and method of manufacturing liquid crystal display device for preventing defects in liquid crystal
JP2008145592A (ja) * 2006-12-07 2008-06-26 Lg Phillips Lcd Co Ltd 液晶パネルセル及びその製造方法
JP2009025826A (ja) * 2008-09-12 2009-02-05 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
US7867580B2 (en) 2004-02-10 2011-01-11 Dai Nippon Printing Co., Ltd. Liquid crystal display
US7907247B2 (en) 2005-05-19 2011-03-15 Dai Nippon Printing Co., Ltd. Liquid crystal display
JP2012053491A (ja) * 2011-12-12 2012-03-15 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法

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JP2006023730A (ja) * 2004-06-11 2006-01-26 Dainippon Printing Co Ltd 液晶表示素子
JP4580695B2 (ja) * 2004-06-21 2010-11-17 大日本印刷株式会社 液晶表示素子
US9249242B2 (en) 2011-08-29 2016-02-02 Sharp Kabushiki Kaisha Method for manufacturing liquid crystal display device
JP6025324B2 (ja) 2011-12-15 2016-11-16 三菱電機株式会社 液晶表示装置
CN104898323B (zh) * 2014-12-30 2018-09-14 南京中电熊猫液晶显示科技有限公司 光配向方法和液晶显示面板

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JP2005258429A (ja) * 2004-02-10 2005-09-22 Dainippon Printing Co Ltd 液晶表示素子
US7867580B2 (en) 2004-02-10 2011-01-11 Dai Nippon Printing Co., Ltd. Liquid crystal display
US7362404B2 (en) 2004-03-31 2008-04-22 Fujitsu Limited Liquid crystal display device and method of manufacturing liquid crystal display device for preventing defects in liquid crystal
US7907247B2 (en) 2005-05-19 2011-03-15 Dai Nippon Printing Co., Ltd. Liquid crystal display
JP2006323222A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2006323215A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2006323214A (ja) * 2005-05-19 2006-11-30 Dainippon Printing Co Ltd 液晶表示素子
WO2006123791A1 (fr) * 2005-05-19 2006-11-23 Dai Nippon Printing Co., Ltd. Dispositif d’affichage a cristaux liquides et procede de fabrication d’un dispositif d’affichage a cristaux liquides
US7911562B2 (en) 2005-05-19 2011-03-22 Dai Nippon Printing Co., Ltd. Liquid crystal display and process for producing the same
JP2011248368A (ja) * 2005-05-19 2011-12-08 Dainippon Printing Co Ltd 液晶表示素子
JP2007011069A (ja) * 2005-06-30 2007-01-18 Lg Phillips Lcd Co Ltd 液晶表示素子及びその製造方法
JP4546340B2 (ja) * 2005-06-30 2010-09-15 エルジー ディスプレイ カンパニー リミテッド 液晶表示素子の製造方法
JP2007057817A (ja) * 2005-08-24 2007-03-08 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2008145592A (ja) * 2006-12-07 2008-06-26 Lg Phillips Lcd Co Ltd 液晶パネルセル及びその製造方法
JP2009025826A (ja) * 2008-09-12 2009-02-05 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法
JP2012053491A (ja) * 2011-12-12 2012-03-15 Dainippon Printing Co Ltd 液晶表示素子および液晶表示素子の製造方法

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