JP2006133619A - Liquid crystal display device and method for manufacturing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device with which excellent display quality is obtained in relation to a vertical alignment liquid crystal display device and a method for manufacturing the same, and to provide the method for manufacturing the same. <P>SOLUTION: The liquid crystal display device is constructed so as to have: a pair of substrates 2, 4 placed opposite to each other; a liquid crystal layer 6 with negative dielectric anisotropy sealed in between the substrates 2, 4; polymer layers 38 formed in the vicinity of boundaries between the liquid crystal layer 6 and the substrates 2, 4 and controls alignment of the liquid crystal layer 6 in such a way that liquid crystal molecules 8 incline in a plurality of directions inside a pixel when a voltage is applied to the liquid crystal layer 6; a pair of quarter-wave plates disposed on the outside of the substrates 2, 4; and a pair of polarizing plates disposed on the outside of the pair of quarter-wave plates. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a vertical alignment type liquid crystal display device in which liquid crystal molecules are aligned substantially perpendicular to a substrate surface when no voltage is applied, and a method for manufacturing the same.

  A vertical alignment type liquid crystal display device includes a pair of substrates opposed to each other with a predetermined cell gap, electrodes formed on opposite surfaces of the pair of substrates, and vertical alignment formed on both electrodes, respectively. And a liquid crystal having negative dielectric anisotropy sealed between a pair of substrates. The liquid crystal in a state where no voltage is applied between the electrodes has a vertical alignment in which the major axis of the liquid crystal molecules is substantially perpendicular to the substrate surface. A pair of polarizing plates are arranged in crossed Nicols outside both substrates. When a voltage is applied between the electrodes to change the electric field strength in the liquid crystal, the liquid crystal molecules are inclined in the direction of the substrate surface accordingly. The refractive index anisotropy changes depending on the inclination of the liquid crystal molecules. Therefore, linearly polarized light incident on the liquid crystal from one polarizing plate side becomes elliptically polarized light corresponding to the degree of inclination of the liquid crystal molecules. Of the elliptically polarized light emitted from the liquid crystal, light having a component parallel to the light transmission axis of the other polarizing plate is emitted from the polarizing plate and visually recognized by the observer.

  In a vertical alignment type liquid crystal display device that performs such an operation, the tilt direction of liquid crystal molecules is not biased when a voltage is applied so that good display quality can be obtained when the image display region is viewed from any direction. Wide viewing angle technology is used. As the wide viewing angle technology, for example, an MVA (Multi-domain Vertical Alignment) system disclosed in Patent Document 1 is used. In the MVA method, a projecting structure that regulates the alignment of liquid crystal in four orthogonal directions is formed in the lower layer of the vertical alignment film, and when a voltage is applied, the liquid crystal molecules are divided into four regions and each tilts in four directions. . As a result of the mixing of the viewing angle characteristics of each region, a wide viewing angle can be obtained.

  On the other hand, there is a technique in which a pair of quarter-wave plates whose slow axes are orthogonal to each other are arranged between a liquid crystal display panel and both polarizing plates so as to obtain a high-luminance display (for example, Patent Document 2). reference). Since the light transmitted through the polarizing plate and the quarter-wave plate in this order becomes circularly polarized light, by applying this technique to a normally black mode liquid crystal display device, the light transmittance is in the tilt direction of the liquid crystal molecules. It does not depend but changes depending only on the tilt angle of the liquid crystal molecules. Therefore, when the voltage is applied to the liquid crystal, the light transmittance increases regardless of the direction in which the liquid crystal molecules are tilted, so that the luminance of the liquid crystal display device can be greatly improved.

  It is considered that a high-luminance display with a wide viewing angle can be obtained by combining a quarter wave plate with an MVA liquid crystal display device. However, in a general MVA type liquid crystal display device, a projecting structure is formed in the pixel region, so that the aperture area is reduced correspondingly and the luminance is lowered. Contrast is greatly reduced due to disorder of alignment of the liquid crystal and change in cell thickness. For this reason, there is a technique in which the alignment of the liquid crystal is regulated by forming fine slits extending radially, for example, on the outer periphery of the pixel electrode without providing the protruding structure. Thereby, the brightness | luminance and contrast of a liquid crystal display device can be improved. Further, since the process of forming the protruding structure is not necessary, the manufacturing process of the liquid crystal display device is reduced.

  Even in a liquid crystal display device using a quarter-wave plate, if the tilt direction of the liquid crystal molecules becomes non-uniform for each pixel, the visibility (particularly the viewing angle characteristic) in halftone display is degraded, and the display quality is extremely degraded. For this reason, the tilt direction of the liquid crystal molecules needs to be uniform for each pixel. However, when the liquid crystal display panel is actually driven, various lateral electric fields are generated, and the substrate surface is not flat, and structural irregularities are formed. Therefore, it is not easy to obtain a desired liquid crystal alignment. In particular, when the alignment of liquid crystal is regulated using only fine slits without using the protruding structure, it is extremely difficult to obtain a desired liquid crystal alignment. As described above, there is a problem that it is difficult to realize a liquid crystal display device with a wide viewing angle, high brightness, and high contrast.

Japanese Patent No. 2947350 JP 2002-303869 A JP 2003-107477 A Japanese Patent Laid-Open No. 2003-177408

  An object of the present invention is to provide a liquid crystal display device that can obtain good display quality and a method for manufacturing the same.

  The object is to provide a pair of opposed substrates, a liquid crystal having negative dielectric anisotropy sealed between the pair of substrates, and a liquid crystal of the liquid crystal layer when a voltage is applied to the liquid crystal layer. A pixel electrode structure that controls the orientation of the liquid crystal molecules so that the molecules are tilted in a plurality of directions within one pixel, and is formed in the vicinity of the interface between the liquid crystal layer and the pair of substrates, and stores the tilt directions of the liquid crystal molecules A pair of quarter-wave plates disposed outside the pair of substrates, and a pair of polarizing plates disposed outside the pair of quarter-wave plates. This is achieved by a liquid crystal display device.

  According to the present invention, it is possible to realize a liquid crystal display device capable of obtaining good display quality.

  A liquid crystal display device and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 schematically shows a configuration of a liquid crystal display device according to the present embodiment. As shown in FIG. 1, in the liquid crystal display device, a liquid crystal having a negative dielectric anisotropy is sealed between a pair of substrates, and the alignment of the liquid crystal is regulated by a polymer aligned alignment (PSA) technique. A liquid crystal display panel 1 is provided. On the outside across the liquid crystal display panel 1, quarter-wave plates 80 and 81 that cause an optical path difference of approximately ¼ wavelength between linearly polarized lights having polarization directions orthogonal to each other are disposed. In addition, polarizing plates 82 and 83 are disposed outside the quarter-wave plates 80 and 81, respectively. A backlight unit (not shown) is disposed below the polarizing plate 83 in the drawing.

  FIG. 2 schematically shows a cross-sectional configuration of the liquid crystal display panel 1. As shown in FIG. 2, the liquid crystal display panel 1 includes a thin film transistor (TFT) substrate 2, a counter substrate 4, and a liquid crystal layer 6 sealed between the substrates 2 and 4. The TFT substrate 2 has, for example, a transparent glass substrate 10 and pixel electrodes 16 formed for each pixel on the glass substrate 10. The counter substrate 4 includes, for example, a transparent glass substrate 11 and a common electrode 42 formed on almost the entire surface of the glass substrate 11. The pixel electrode 16 and the common electrode 42 are formed of, for example, a transparent conductive film. On the pixel electrode 16 and the common electrode 42, vertical alignment films 36 for aligning the liquid crystal molecules 8 of the liquid crystal layer 6 almost perpendicularly to the substrate surface are formed. The vertical alignment film 36 is made of polyimide, for example. In the vicinity of the interface between the vertical alignment film 36 formed on both the substrates 2 and 4 and the liquid crystal layer 6, the liquid crystal molecules 8 are inclined in a plurality of directions within one pixel when a voltage is applied to the liquid crystal layer 6. Thus, the polymer layers 38 that regulate the alignment of the liquid crystal layer 6 are formed. The polymer layer 38 is formed, for example, by polymerizing a photopolymerizable component mixed in the liquid crystal layer 6.

  FIG. 3 shows the configuration of one pixel of the TFT substrate 2 of the liquid crystal display panel 1. As shown in FIG. 3, on the TFT substrate 2, a plurality of gate bus lines 12 extending in the left-right direction in the figure are formed substantially parallel to each other. A plurality of drain bus lines 14 extending in the vertical direction in the figure are formed substantially parallel to each other so as to cross the gate bus line 12 through an insulating film (not shown). A region surrounded by the gate bus line 12 and the drain bus line 14 is a pixel region. A storage capacitor bus line 18 extending substantially parallel to the gate bus line 12 is formed across the pixel region. A TFT 20 is formed near the intersection of the gate bus line 12 and the drain bus line 14. A part of the gate bus line 12 functions as a gate electrode of the TFT 20, and the drain electrode 21 of the TFT 20 is electrically connected to the drain bus line 14. A storage capacitor electrode 19 is formed on the storage capacitor bus line 18 for each pixel region via an insulating film. The storage capacitor electrode 19 is electrically connected to the source electrode 22 of the TFT 20 and is electrically connected to the pixel electrode 16 through the contact hole 24. The storage capacitor bus line 18 and the storage capacitor electrode 19 function as a pair of storage capacitor electrodes formed for each pixel.

  The pixel electrode 16 is smaller than the size of the pixel region, and is separated by, for example, three electrode units 50 having a square outer periphery, an electrode extraction part (slit) 52 formed between adjacent electrode units 50, and the slit 52. And a connection electrode 54 for electrically connecting the electrode units 50 to each other. The three electrode units 50 are arranged in the direction in which the drain bus line 14 extends. Each electrode unit 50 is formed with a plurality of fine slits 56 cut in four directions oblique to the extending direction of the gate bus line 12 or the drain bus line 14 from the outer periphery thereof. The direction in which the fine slit 56 extends is the direction from the upper right to the lower left in the upper right area of each electrode unit 50, the direction from the upper left to the lower right in the upper left area in the figure, and the lower left area in the figure. The direction is from the lower left to the upper right, and in the lower right region in the figure, the direction is from the lower right to the upper left. The areas of these four regions are almost the same for each electrode unit 50. The liquid crystal molecules 8 are provided with a pretilt parallel to the extending direction of the fine slits 56 by the polymer layer 38. Accordingly, when a voltage is applied to the liquid crystal layer 6, the liquid crystal molecules 8 are inclined in parallel with the direction in which the fine slits 56 extend, so that the liquid crystal molecules 8 in one pixel are substantially uniformly inclined in the four orthogonal directions. In the present embodiment, since the projecting structures for regulating the orientation are not formed on both opposing surfaces of the substrates 2 and 4, the opposing surfaces of the substrates 2 and 4 are substantially flat.

  4A to 4C show modified examples of the configuration of the pixel electrode 16. In the example shown in FIG. 4A, the electrode unit 50 of the pixel electrode 16 is cut from a solid electrode 57 disposed in a relatively wide area at the center and from the outer periphery of the electrode unit 50 to the outer periphery of the solid electrode 57. It has a fine slit 56 inserted therein. In the example shown in FIG. 4B, the extending direction of the fine slit 56 of the electrode unit 50 is substantially parallel to the extending direction of the gate bus line 12 or the drain bus line 14. In the example shown in FIG. 4C, the pixel electrode 16 has 12 (= 2 × 6) electrode units 50. Two electrode units 50 are arranged in the direction in which the gate bus lines 12 extend, and six electrode units 50 are arranged in the direction in which the drain bus lines 14 extend. In each of the examples shown in FIGS. 4A to 4C, the liquid crystal molecules 8 in one pixel are inclined almost uniformly in four orthogonal directions when a voltage is applied. The pixel electrode 16 is not limited to the example shown in FIGS. 3 and 4A to 4C. For example, the fine slits 56 of the electrode unit 50 extend radially, and the liquid crystal molecules 8 at the time of voltage application are the electrode units 50. You may have other structures, such as the structure which inclines radially every time.

  FIG. 5 shows the arrangement of the optical axes of the polarizing plates 82 and 83 and the quarter-wave plates 80 and 81. As shown in FIG. 5, when viewed perpendicular to the substrate surface, the polarizing axis 82a of the polarizing plate 82 and the polarizing axis 83a of the polarizing plate 83 are substantially orthogonal. Further, the optical axis (slow axis) 80a of the quarter wavelength plate 80 and the optical axis 81a of the quarter wavelength plate 81 are substantially orthogonal. The angle formed by the polarization axis 82a and the optical axis 80a and the angle formed by the polarization axis 83a and the optical axis 81a are both about 45 °. That is, the polarizing plate 82 and the quarter wavelength plate 80, and the polarizing plate 83 and the quarter wavelength plate 81 constitute a circular polarizer, respectively. The light emitted from the backlight unit and transmitted through the polarizing plate 83 and the quarter-wave plate in this order becomes circularly polarized light, and therefore does not depend on the tilt direction of the liquid crystal molecules 8 but depends on the tilt angle of the liquid crystal molecules 8. As a result, the light transmittance changes.

  According to the present embodiment, since the tilt direction of the liquid crystal molecules 8 is regulated by the polymer layer 38 formed in almost the entire area of the substrate interface, the liquid crystal molecules 8 are not affected by a lateral electric field or the like and are orthogonally directed in four directions. The liquid crystal tilts almost uniformly, and even if the substrates 2 and 4 are locally pressed by finger pressing or the like, the alignment disorder of the liquid crystal is hardly generated. Therefore, a liquid crystal display device having a wide viewing angle and good display characteristics can be obtained. Further, according to the present embodiment, since the light transmittance changes depending on only the tilt angle of the liquid crystal molecules 8 by using the circular polarizer, a liquid crystal display device with high luminance can be obtained. Furthermore, according to the present embodiment, since no projecting structure for regulating the alignment is formed on any of the substrates 2 and 4, the aperture area is not reduced and the alignment of the liquid crystal is not disturbed. A display is obtained. Moreover, since the process of forming the protruding structure is not necessary, the manufacturing process of the liquid crystal display device can be simplified.

  Next, a manufacturing method of the liquid crystal display device according to the present embodiment will be described. FIG. 6 schematically shows a manufacturing process of the liquid crystal display device according to the present embodiment. First, as shown in FIG. 6A, a vertical alignment film 36 is formed on each of the opposing surfaces of the TFT substrate 2 and the counter substrate 4 manufactured through predetermined processes, and the substrates 2 and 4 are bonded together. A liquid crystal layer 6 is formed by sealing a liquid crystal mixed with a photopolymerizable monomer 37 (for example, UCL-001 manufactured by Dainippon Ink & Chemicals, Inc.) between the substrates 2 and 4, and the liquid crystal display panel 1 is manufactured. At this time, the liquid crystal molecules 8 are aligned substantially perpendicular to the substrate surface. Next, as shown in FIG. 6B, for example, a predetermined direct current voltage is uniformly applied to the liquid crystal layer 6 in the entire display region, and ultraviolet light (UV light) is applied, for example, with the liquid crystal molecules 8 tilted. Irradiation is performed for about 2 seconds to polymerize the photopolymerizable monomer 37 to form a polymer layer 38 in the vicinity of the interface between the vertical alignment film 36 and the liquid crystal layer 6 on the TFT substrate 2 and the counter substrate 4 (see FIG. 2). The polymer layer 38 is formed so as to be laminated on the vertical alignment film 36.

  FIG. 7 is a graph showing changes in the voltage applied to the liquid crystal layer 6 in the process of forming the polymer layer 38. The horizontal axis in FIG. 7 represents the elapsed time (min) from the start of voltage application, and the vertical axis represents the voltage (V) applied to the liquid crystal layer 6. As shown in FIG. 7, first, a first voltage lower than the threshold voltage (for example, 2 V) of the liquid crystal layer 6 is applied to the liquid crystal layer 6. The liquid crystal molecules 8 in this state are aligned substantially perpendicular to the substrate surface as in the case of no voltage application. Next, the applied voltage is gradually increased so that, for example, a second voltage (eg, 2.2 V) slightly exceeding the threshold voltage is applied to the liquid crystal layer 6 after one minute from the start of voltage application. The voltage is maintained for 1 minute or more, for example. When a voltage exceeding the threshold voltage is applied to the liquid crystal layer 6, the liquid crystal molecules 8 start to tilt with respect to the substrate surface. At the beginning of the tilt, the orientation of the liquid crystal molecules 8 may be disturbed, but by maintaining this voltage for about 1 minute, the orientation disorder is substantially eliminated, and the liquid crystal molecules 8 are in the direction in which the fine slits 56 of the electrode unit 50 extend. Tilt along. Thereafter, the applied voltage is further increased, and a third voltage (for example, 5.5 V or more) is applied to the liquid crystal layer 6 after, for example, 5 minutes from the start of voltage application. Since the alignment disorder of the liquid crystal molecules 8 has already been almost eliminated, the alignment disorder does not occur again even when the applied voltage is increased. In a state where this voltage is applied to the liquid crystal layer 6, the liquid crystal layer 6 is irradiated with UV light. By irradiation with UV light, the photopolymerizable monomer 37 mixed in the liquid crystal layer 6 is polymerized, and a polymer layer 38 is formed in the vicinity of the interface with the vertical alignment film 36. The polymer layer 38 tilts the liquid crystal molecules 8 with a predetermined pretilt angle with respect to the substrate surface even when voltage application is removed, and the tilt direction of the liquid crystal molecules 8 when the liquid crystal display panel 1 is actually driven is regulated. In this example, a DC voltage is applied to the liquid crystal layer 6, but an AC voltage may be applied.

  Next, quarter-wave plates 80 and 81 are disposed outside the liquid crystal display panel 1, and polarizing plates 82 and 83 are disposed further outside the quarter-wave plates 80 and 81, respectively. Then, a liquid crystal display device is completed through a predetermined module process.

  According to the present embodiment, since the voltage slightly exceeding the threshold voltage is continuously applied to the liquid crystal layer 6 for a predetermined time, the alignment disorder of the liquid crystal molecules 8 when the polymer layer 38 is formed can be eliminated. The pretilt direction of the liquid crystal molecules 8 imparted by the formed polymer layer 38 can be made uniform for each pixel. Therefore, when the liquid crystal display panel 1 is actually driven, the liquid crystal molecules 8 of each pixel are tilted almost uniformly in the four orthogonal directions, so that display roughness does not occur and a good display quality with excellent viewing angle characteristics is obtained. can get.

The present invention is not limited to the above embodiment, and various modifications can be made.
In the above embodiment, a transmissive liquid crystal display device is taken as an example. However, the present invention is not limited to this, and can be applied to other liquid crystal display devices such as a reflective type and a transflective type.

The liquid crystal display device and the manufacturing method thereof according to the embodiment described above are summarized as follows.
(Appendix 1)
A pair of opposed substrates;
A liquid crystal layer in which a liquid crystal having negative dielectric anisotropy is sealed between the pair of substrates;
The liquid crystal molecules are formed near the interface between the liquid crystal layer and the pair of substrates, and the liquid crystal molecules are aligned in a plurality of directions within one pixel when a voltage is applied to the liquid crystal. A polymer layer to
A pair of quarter-wave plates disposed outside the pair of substrates;
A liquid crystal display device comprising: a pair of polarizing plates disposed outside the pair of quarter-wave plates.
(Appendix 2)
In the liquid crystal display device according to appendix 1,
One of the pair of substrates has a pixel electrode for each pixel,
The pixel electrode includes a plurality of electrode units, a slit formed between the plurality of adjacent electrode units, and a connection electrode that electrically connects the plurality of electrode units. Liquid crystal display device.
(Appendix 3)
In the liquid crystal display device according to attachment 2,
The electrode unit has a fine slit extending in a plurality of directions at least in an outer peripheral portion.
(Appendix 4)
In the liquid crystal display device according to any one of appendices 1 to 3,
Both of the pair of substrates do not have a protruding structure for regulating the alignment of the liquid crystal.
(Appendix 5)
In the liquid crystal display device according to any one of appendices 1 to 4,
The liquid crystal display device, wherein the polymer layer is formed by polymerizing a photopolymerizable component mixed in the liquid crystal.
(Appendix 6)
In the liquid crystal display device according to any one of appendices 1 to 5,
The pair of quarter wave plates are arranged so that optical axes are substantially orthogonal to each other,
Each of the pair of polarizing plates is arranged such that an angle formed by an optical axis of the quarter-wave plate arranged inside and a polarizing axis of the polarizing plate is approximately 45 °. Liquid crystal display device.
(Appendix 7)
A liquid crystal layer is formed by sealing a liquid crystal mixed with a polymerizable component between a pair of substrates.
Applying a first voltage smaller than a threshold voltage of the liquid crystal to the liquid crystal layer;
The voltage applied to the liquid crystal layer is gradually changed from the first voltage to a second voltage having a magnitude larger than the threshold voltage,
Applying the second voltage to the liquid crystal layer for a predetermined time;
Changing the voltage applied to the liquid crystal layer from the second voltage to a third voltage having a magnitude larger than the second voltage;
Polymerizing the polymerizable component while applying the third voltage to the liquid crystal layer to form a polymer layer in the vicinity of the interface between the liquid crystal layer and the pair of substrates;
A pair of quarter-wave plates are disposed outside the pair of substrates,
A method of manufacturing a liquid crystal display device, comprising: arranging a pair of polarizing plates outside the pair of quarter-wave plates.
(Appendix 8)
In the method for manufacturing a liquid crystal display device according to appendix 7,
The method of manufacturing a liquid crystal display device, wherein the second voltage is slightly larger than the threshold voltage.
(Appendix 9)
In the method for manufacturing a liquid crystal display device according to appendix 7 or 8,
The predetermined time is 1 minute or more. A method of manufacturing a liquid crystal display device.

It is a figure which shows typically the structure of the liquid crystal display device by one embodiment of this invention. It is a figure which shows typically the cross-sectional structure of the liquid crystal display panel of the liquid crystal display device by one embodiment of this invention. It is a figure which shows the structure of one glass substrate of the liquid crystal display device by one embodiment of this invention. It is a figure which shows the modification of a structure of a pixel electrode. It is a figure which shows arrangement | positioning of the optical axis of a polarizing plate and a quarter wavelength plate. It is a figure which shows typically the manufacturing method of the liquid crystal display device by one embodiment of this invention. It is a graph which shows the change of the applied voltage to the liquid crystal in the process of forming a polymer layer.

Explanation of symbols

1 liquid crystal display panel 2 TFT substrate 4 counter substrate 6 liquid crystal layer 8 liquid crystal molecules 10 and 11 glass substrate 12 gate bus line 14 drain bus line 16 pixel electrode 18 storage capacitor bus line 19 storage capacitor electrode 20 TFT
21 drain electrode 22 source electrode 24 contact hole 36 vertical alignment film 37 photopolymerizable monomer 38 polymer layer 42 common electrode 50 electrode unit 52 slit 54 connection electrode 56 fine slit 57 solid electrode 80, 81 1/4 wavelength plate 80a, 81a optical Axis 82, 83 Polarizing plate 82a, 83a Polarization axis

Claims (5)

A pair of opposed substrates;
A liquid crystal layer in which a liquid crystal having negative dielectric anisotropy is sealed between the pair of substrates;
The liquid crystal molecules are formed near the interface between the liquid crystal layer and the pair of substrates, and the liquid crystal molecules are aligned in a plurality of directions within one pixel when a voltage is applied to the liquid crystal. A polymer layer to
A pair of quarter-wave plates disposed outside the pair of substrates;
A liquid crystal display device comprising: a pair of polarizing plates disposed outside the pair of quarter-wave plates. The liquid crystal display device according to claim 1.
One of the pair of substrates has a pixel electrode for each pixel,
The pixel electrode includes a plurality of electrode units, a slit formed between the plurality of adjacent electrode units, and a connection electrode that electrically connects the plurality of electrode units. Liquid crystal display device. The liquid crystal display device according to claim 1 or 2,
The liquid crystal display device, wherein the polymer layer is formed by polymerizing a photopolymerizable component mixed in the liquid crystal. A liquid crystal layer is formed by sealing a liquid crystal mixed with a polymerizable component between a pair of substrates.
Applying a first voltage smaller than a threshold voltage of the liquid crystal to the liquid crystal layer;
The voltage applied to the liquid crystal layer is gradually changed from the first voltage to a second voltage having a magnitude larger than the threshold voltage,
Applying the second voltage to the liquid crystal layer for a predetermined time;
Changing the voltage applied to the liquid crystal layer from the second voltage to a third voltage having a magnitude larger than the second voltage;
Polymerizing the polymerizable component while applying the third voltage to the liquid crystal layer to form a polymer layer in the vicinity of the interface between the liquid crystal layer and the pair of substrates;
A pair of quarter-wave plates are disposed outside the pair of substrates,
A method of manufacturing a liquid crystal display device, comprising: arranging a pair of polarizing plates outside the pair of quarter-wave plates. In the manufacturing method of the liquid crystal display device of Claim 4,
The predetermined time is 1 minute or more. A method of manufacturing a liquid crystal display device.

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