JP6419291B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device having a plurality of openings (slits) in an electrode.

  Japanese Patent Laying-Open No. 2004-252298 (Patent Document 1) discloses a liquid crystal display device in which an opening (slit) is provided in each of transparent electrodes arranged to face each other with a liquid crystal layer interposed therebetween. In this liquid crystal display device, an oblique electric field is generated in two different directions by the action of the slits and applied to the liquid crystal layer, thereby generating a two-domain alignment structure in the liquid crystal layer. Thereby, the viewing angle dependency is improved, and the viewing angle dependency can be reduced as a whole display area. Japanese Patent Laid-Open No. 2009-122271 (Patent Document 2) discloses that in a liquid crystal display element provided with slits as described above, the interval between adjacent slits in the longitudinal direction is the width of each slit (in the short direction). There has been disclosed a liquid crystal display device in which display uniformity is improved by making it smaller than (length).

  By the way, when patterning a large number of slits during the manufacture of the liquid crystal display device as described above, due to variations in etching accuracy, the slits are coupled in the respective longitudinal directions, thereby disconnecting a part of the electrode. There may be a problem that it occurs. In order to prevent this problem, it is preferable that the mutual interval between the slits adjacent in the longitudinal direction is ½ or more of the slit width. For example, when the slit width is set to 20 μm, it is necessary to secure a mutual space between the slits of 10 μm or more in order to remove the disconnection. However, the effective aperture ratio of the display unit of the liquid crystal display device decreases as the mutual interval or slit width between the slits increases. For this reason, the technique which can narrow a slit width | variety is ensured, ensuring the mutual space | interval of slits sufficiently and sufficiently.

JP 2004-252298 A JP 2009-122271 A

  A specific aspect of the present invention is directed to a technique capable of preventing disconnection between openings and preventing a decrease in opening ratio while ensuring display uniformity in a liquid crystal display device provided with a plurality of openings. One.

[1] A liquid crystal display device according to an aspect of the present invention includes (a) a first substrate and a second substrate that are disposed to face each other, and (b) a plurality of first openings. A first electrode provided on one side; (c) a second electrode provided with a plurality of second openings and provided on one side of the second substrate; and (d) the first substrate and the second. A liquid crystal layer provided between each surface of the substrate, and (e) the plurality of first openings have a constant slit width in a plan view and are separated from each other in the longitudinal direction. (F) The plurality of second openings have a recess in at least one of both side edges along the longitudinal direction in plan view, and are disposed separately from each other in the longitudinal direction. (G) The plurality of first openings and the plurality of second openings have respective slit lengths. Correct, it is a liquid crystal display device.
[2] A liquid crystal display device according to an aspect of the present invention includes (a) a first substrate and a second substrate which are disposed to face each other, and (b) a plurality of first openings, A first electrode provided on one side; (c) a second electrode provided with a plurality of second openings and provided on one side of the second substrate; and (d) the first substrate and the second. A liquid crystal layer provided between each surface of the substrate, and (e) the plurality of first openings are a third opening having a constant slit width in a plan view and each longitudinal direction in the plan view. A fourth opening having a recess on at least one of the side edges along the edge, and the third opening and the fourth opening are separated from each other in the longitudinal direction and are alternately arranged one by one; (F) The plurality of second openings are arranged in a plan view with a fifth opening having a constant slit width in a plan view. And a sixth opening having a recess in at least one of both side edges along each longitudinal direction, and the fifth opening and the sixth opening are separated from each other in the longitudinal direction. This is a liquid crystal display device that is alternately arranged one by one.
[3] A liquid crystal display device according to an aspect of the present invention includes (a) a first substrate and a second substrate which are arranged to face each other, and (b) a plurality of first openings, A first electrode provided on one side; (c) a second electrode provided with a plurality of second openings and provided on one side of the second substrate; and (d) the first substrate and the second. A liquid crystal layer provided between each surface of the substrate, and (e) the plurality of first openings have a constant slit width in a plan view in a first direction parallel to each longitudinal direction. (F) the plurality of second openings have recesses in at least one of both side edges along the longitudinal direction in plan view, and each longitudinal direction includes And (g) the plurality of first openings and the plurality of the plurality of first openings. The second opening of the are arranged offset to each other the center of gravity position in each longitudinal direction in the first direction, a liquid crystal display device.

  According to the above configuration, it is possible to prevent disconnection between the openings and prevent a decrease in the aperture ratio while ensuring display uniformity in a liquid crystal display device provided with a plurality of openings.

FIG. 1 is a cross-sectional view showing a basic structure of a liquid crystal display device according to an embodiment. FIG. 2 is a plan view of the first opening and the second opening of Structural Example 1. FIG. 3A is a diagram illustrating a state in which a liquid crystal display device having each opening of Structural Example 1 is actually manufactured and observed in a state before the liquid crystal layer is formed. FIG. 3B is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 1 is observed in a state after the liquid crystal layer is formed (completed state). FIG. 4 is a plan view of the first opening and the second opening of Structural Example 2. FIG. 5 is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 2 is observed in a state after the liquid crystal layer is formed (completed state). FIG. 6 is a plan view showing a structural example of the first electrode and the second electrode. FIG. 7 is a plan view of the first opening and the second opening of Structural Example 3. FIG. 8 is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 3 is observed in a state after the liquid crystal layer is formed (completed state). FIG. 9A and FIG. 9B are plan views showing modifications of the first opening and the second opening of Structural Example 3. FIG. 10 is a plan view showing a structural example of the first electrode and the second electrode. FIG. 11 is a plan view of the first opening and the second opening of Structural Example 4. FIG. 12 is a plan view of the first opening and the second opening of Structural Example 5. FIG. 13 is a plan view of the first opening and the second opening of Structural Example 6.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a cross-sectional view showing a basic structure of a liquid crystal display device according to an embodiment. The liquid crystal display device includes a first substrate 11 and a second substrate 12 which are disposed to face each other, a first electrode 13 provided on the first substrate 11, a second electrode 14 provided on the second substrate 12, A liquid crystal layer 17 disposed between the first substrate 11 and the second substrate 12 is provided as a basic configuration. For example, the liquid crystal display device according to the present embodiment is configured so that a region or region where the electrodes overlap each other directly forms a character or design to be displayed, and can basically display only a predetermined character or the like. This is a segment display type liquid crystal display device in which an area of about 50% or less in the display area contributes to the display of characters and the like. Note that the liquid crystal display device may be a dot matrix display type in which a plurality of pixels are arranged in a matrix, or may be a mixture of a segment display type and a dot matrix type.

  The first substrate 11 and the second substrate 12 are transparent substrates such as a glass substrate and a plastic substrate, respectively. As illustrated, the first substrate 11 and the second substrate 12 are bonded to each other with a predetermined gap (for example, about 4 μm).

  The first electrode (common electrode) 13 is provided on one surface side of the first substrate 11. Similarly, the second electrode (segment electrode) 14 is provided on one surface side of the second substrate 12. The first electrode 13 and the second electrode 14 are each configured by appropriately patterning a transparent conductive film such as indium tin oxide (ITO), for example. The first electrode 13 is provided with a plurality of first openings (first slits) 18, and the second electrode 14 is provided with a plurality of second openings (second slits) 19. Each of the first openings 18 and each of the second openings 19 has a shape that is long in one direction, and is regularly arranged such that the first openings 18 and the second openings 19 are staggered without overlapping each other in plan view.

  The first alignment film 15 is provided on one surface side of the first substrate 11 so as to cover the first electrode 13. The second alignment film 16 is provided on one surface side of the second substrate 12 so as to cover the second electrode 14. As the first alignment film 15 and the second alignment film 16, vertical alignment films that restrict the alignment state of the liquid crystal layer 17 to the vertical alignment are used. Each alignment film is not subjected to uniaxial alignment treatment such as rubbing treatment.

  The liquid crystal layer 17 is provided between the first substrate 11 and the second substrate 12. In the present embodiment, the liquid crystal layer 17 is configured using a liquid crystal material having a negative dielectric anisotropy Δε. The refractive index anisotropy Δn of the liquid crystal material is, for example, about 0.09. The thick line shown in the liquid crystal layer 17 schematically shows the alignment direction of the liquid crystal molecules in the liquid crystal layer 17. The liquid crystal layer 17 of the present embodiment is set to a vertical alignment in which the alignment direction of liquid crystal molecules when no voltage is applied is perpendicular to the substrate surfaces of the first substrate 11 and the second substrate 12.

  The first polarizing plate 21 is disposed outside the first substrate 11. Similarly, the second polarizing plate 22 is disposed outside the second substrate 12. The first polarizing plate 21 and the second polarizing plate 22 are arranged so that their absorption axes are substantially orthogonal to each other. As for the arrangement of each polarizing plate, for example, the absorption axis direction of the first polarizing plate is set to a direction rotated 45 ° clockwise with respect to the respective longitudinal directions of the first opening 18 and the second opening 19, The absorption axis direction of the two polarizing plates can be set to a direction rotated 45 ° counterclockwise with respect to the longitudinal directions of the first opening 18 and the second opening 19. In addition, an optical compensation plate such as a C plate may be appropriately disposed between each polarizing plate and each substrate. For example, in the present embodiment, optical compensation plates 23 and 24 are disposed between the first substrate 11 and the first polarizing plate 21 and between the second substrate 12 and the second polarizing plate 22, respectively.

  Hereinafter, several structural examples of the first opening 18 and the second opening 19 will be described.

(Structural example 1)
FIG. 2 is a plan view of the first opening and the second opening of Structural Example 1. The first openings 18 and the second openings 19 are arranged in a plan view in which the longitudinal direction is along the y direction shown in the drawing and the short direction is arranged along the x direction shown in the drawing. The first openings 18 and the second openings 19 are regularly arranged in columns in the y direction and in rows in the x direction. In addition, the first openings 18 and the second openings 19 are alternately (alternately) arranged along the x direction and are shifted in the y direction.

  Each first opening 18 has a portion 18a having a relatively large slit width on each of one end side and the other end side along the longitudinal direction, and the slit width is relatively small between these two portions 18a. It has a portion 18b, and further has a slope-like portion 18c that is arranged between a portion 18a having a relatively large slit width and a portion 18b having a relatively small slit width to connect the two. The slit width is constant in the portion 18a having a relatively large slit width and the portion 18b having a relatively small slit width. In the slope-shaped portion 18c, the slit width continuously decreases from the portion 18a having a relatively large slit width toward the portion 18b having a relatively small slit width. In other words, each first opening 18 has a substantially trapezoidal recess (recess) in plan view at an edge near the center in the longitudinal direction. Each second opening 19 is the same as each first opening 18, and each has a portion 19a having a relatively large slit width, a portion 19b having a relatively small slit width, and a slope-shaped portion 19c. And has substantially trapezoidal depressions (recesses) in plan view at both side edges near the center in the longitudinal direction.

  As shown in FIG. 2, in each first opening 18, the length in the y direction of the portion 18a having a relatively large slit width is La, the length in the y direction of the portion 18b having a relatively small slit width is Lb, and the slope. The length of the portion 18c in the y direction is Lc. Further, in each first opening 18, Sw is the slit width (length in the x direction) of the portion 18a having a relatively large slit width, and the slit width (length in the x direction) of the portion 18b having a relatively small slit width. Let it be Sn. In addition, the interval between the first openings 18 adjacent in the longitudinal direction is Lp, the interval (arrangement pitch) between the first openings 18 adjacent in the short direction is Sp, and the first adjacent in the x direction. Let S be the mutual distance between the opening 18 and the second opening 19. Although not shown, these parameters are similarly defined in each second opening 19.

  Further, the first openings 18 and the second openings 19 are arranged so that the positions of the center of gravity of the first openings 18 and the second openings 19 are shifted by approximately half a pitch in the y direction, and the slope-shaped portion 18c and the slope-shaped portion 19c are mutually connected. Since the edges are arranged substantially in parallel, the intervals between the edges of the slope-shaped portions 18c and 19c are substantially equal. An example of each shape parameter is La = 0.01 mm, Lb = 0.02 mm, Lc = 0.05 mm, S = 0.035 mm, Sw = 0.02 mm, Sn = 0.01 mm, Sp = 0.10 mm. Lp = 0.01 mm (the same applies to the following embodiments). In addition, according to the disclosed matter of the above-mentioned patent document 2, it is preferable to satisfy Lp <Sw, and this relationship is also satisfied in the above numerical examples.

  FIG. 3A is a diagram illustrating a state in which a liquid crystal display device having each opening of Structural Example 1 is actually manufactured and observed in a state before the liquid crystal layer is formed. In addition, although the position of each 1st opening part and each 2nd opening part of the y direction (up-down direction) has shifted | deviated from the structural example shown in FIG. 2, this is alignment of the 1st board | substrate and the 2nd board | substrate. It is a problem and can be adjusted. When observing each first opening and each second opening, the respective edges at both ends in the longitudinal direction are rounded, which is due to the etching accuracy at the time of pattern formation.

  FIG. 3B is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 1 is observed in a state after the liquid crystal layer is formed (completed state). In FIG. 3B, as described above, a vertical alignment film is used as the alignment film, the distance between the first substrate and the second substrate (cell thickness) is about 4 μm, and the dielectric anisotropy is negative. 5 is a photograph of an alignment structure observed when a voltage equal to or higher than a threshold voltage is applied between a first electrode and a second electrode with respect to a liquid crystal display device in which a liquid crystal layer is formed using a polarizing microscope. Cross-shaped dark areas are generated between the first openings adjacent in the longitudinal direction and between the second openings adjacent in the longitudinal direction, but the dark areas are almost the same. It is a shape and display uniformity is obtained. In addition, a uniform alignment state is obtained between the first opening and the second opening that are adjacent in the short direction, and a good two-domain alignment is obtained.

(Structural example 2)
FIG. 4 is a plan view of the first opening and the second opening of Structural Example 2. Each first opening 18 and each second opening 19 are arranged in the same manner as in the first structural example. The difference from the structural example 1 is the shape of each first opening 18 and each second opening 19 in plan view. Specifically, each first opening 18 does not have the portion 18a having a relatively large slit width in the structural example 1, and is disposed so as to sandwich the portion 18b having one relatively small slit width and the portion 18b. It has two slope-shaped parts 18c. Similarly, each of the second openings 19 does not have the portion 19a having a relatively large slit width in the structural example 1, and is disposed so as to sandwich the portion 19b having a relatively small slit width. It has two slope-shaped parts 19c. Each first opening 18 and each second opening 19 have substantially trapezoidal depressions (recesses) in plan view at both side edges near the center in the longitudinal direction.

  The shape parameters of each first opening 18 and each second opening 19 are defined in the same manner as in Structural Example 1 (the same applies to the following embodiments). In each 1st opening part 18 and each 2nd opening part 19 of the structural example 2, since the part 18a, 19a with a relatively large slit width is not provided, the part 18b, 19b with a relatively small slit width is provided. The y-direction length Lb can be made longer. As an example of each shape parameter, Lb = 0.04 mm, Lc = 0.03 mm, S = 0.035 mm, Sw = 0.02 mm, Sn = 0.01 mm, Sp = 1.10 mm, Lp = 0.01 mm It is.

  FIG. 5 is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 2 is observed in a state after the liquid crystal layer is formed (completed state). In FIG. 5, as described above, a vertical alignment film is used as the alignment film, a distance (cell thickness) between the first substrate and the second substrate is about 4 μm, and a liquid crystal material having a negative dielectric anisotropy is used. It is the photograph which observed the orientation structure | tissue when a voltage more than a threshold voltage was applied between the 1st electrode and the 2nd electrode with respect to the liquid crystal display device in which the liquid crystal layer was formed under the polarizing microscope. As in the case of the structure example 1 described above, cross-shaped dark regions are generated between the first openings adjacent in the longitudinal direction and between the second openings adjacent in the longitudinal direction. However, these dark regions have almost the same shape, and display uniformity is obtained. In addition, a uniform alignment state is obtained between the first opening and the second opening that are adjacent in the short direction, and a good two-domain alignment is obtained.

(Structural example 3)
As described above, the liquid crystal display device according to the present embodiment is a segment display type liquid crystal display device, and is configured such that the region where the electrodes overlap each other directly forms a character or design to be displayed. FIG. 6 is a plan view showing a structural example of the first electrode and the second electrode. Here, an example of the structure of each electrode for displaying the letter “A” is shown. In the illustrated example, the second electrode 14 bears most of the contour shape corresponding to the letter “A”, and the first electrode 13 is formed in a band shape (so-called solid shape) extending in the x direction. Part of the contour shape of “A”. In this case, as shown in the structural examples 1 and 2, the first openings 18 and the second openings 19 can be prevented from being disconnected or poorly aligned even if the first openings 18 and the second openings 19 are not substantially equal in shape. It is possible to further increase the aperture ratio or maintain the alignment uniformity. Hereinafter, each opening of Structural Example 3 will be described in detail.

  FIG. 7 is a plan view of the first opening and the second opening of Structural Example 3. Each of the second openings 19 has the same structure as that of the first structural example. The difference from the structure example 1 is the shape of each first opening 18 in plan view. Specifically, each first opening 18 is not divided in the y direction (longitudinal direction), is longer in the longitudinal direction than the structural example 1, and has a different slit width or a slope-shaped part. The slit width is constant. The slit width Sw of each first opening 18 is, for example, 0.007 mm. In addition, about each 2nd opening part 19, slit width Sw is 0.015 mm and Sn is 0.007 mm, and other shape parameters are the same as that of the numerical example shown in the case of the structural example 1. FIG. In addition, each first opening 18 and each second opening 19 in this example are disposed only inside the display unit (see FIG. 6), which is a region where the first electrode 13 and the second electrode 14 overlap. It is not arranged on the lead line. As a result, even if each first opening 18 extends along the y direction inside the display unit, only one end side in the longitudinal direction of each first opening 18 reaches the edge of the first electrode 13. Therefore, a part of the first electrode 13 is not divided and no disconnection occurs.

  FIG. 8 is a diagram illustrating a state in which the liquid crystal display device having each opening of Structural Example 3 is observed in a state after the liquid crystal layer is formed (completed state). In FIG. 8, as described above, a vertical alignment film is used as the alignment film, the distance between the first substrate and the second substrate (cell thickness) is about 4 μm, and a liquid crystal material having a negative dielectric anisotropy is used. It is the photograph which observed the orientation structure | tissue when a voltage more than a threshold voltage was applied between the 1st electrode and the 2nd electrode with respect to the liquid crystal display device in which the liquid crystal layer was formed under the polarizing microscope. As in the case of the structural example 1 described above, cross-shaped dark regions are generated between the second openings adjacent in the longitudinal direction, but these dark regions are almost the same shape, Display uniformity is obtained. In addition, a uniform alignment state is obtained between the first opening and the second opening that are adjacent in the short direction, and a good two-domain alignment is obtained. Moreover, the aperture ratio can be increased by making the slit width of each first opening 18 narrower.

  In the structural example 3 shown in FIG. 7, since both side edges along the y direction of each first opening 18 are linear, the first opening 18 and the second opening 19 that are adjacent in the x direction The mutual interval of the is not constant. In order to solve this problem, both side edges of each first opening 18 are formed in a polygonal line shape that is substantially the same shape as the edge shape along the y direction of each second opening 19, so that adjacent first openings What is necessary is just to make the edges of 18 and the 2nd opening part 19 substantially parallel. An example of the structure is shown in FIGS. 9A and 9B. FIG. 9A shows a structural example of each first opening 18 when the positions (center of gravity positions) of the second openings 19 adjacent in the x direction among the second openings 19 are equal. . On the other hand, in FIG. 9B, each first opening 18 in the case where the positions (center of gravity positions) of the second openings 19 adjacent to each other in the x direction among the second openings 19 are shifted by a half pitch. An example structure is shown. In this example, the slit width of each first opening 18 is constant.

  Moreover, although the segment display type electrode structure was shown as an electrode structure to which each first opening 18 and each second opening 19 of the structural example 3 is applied (see FIG. 6), for example, as illustrated in FIG. Further, in the dot matrix type electrode structure in which the first electrode 13 and the second electrode 14 are strip-like electrodes extending in one direction and the extending directions of both are intersected, the first openings 18 of the structural example 3 are also provided. And each 2nd opening part 19 is applicable. In this case, the extending direction of one of the electrodes (for example, the first electrode 13) may be substantially parallel to the longitudinal direction of each first opening 18.

(Structural example 4)
In the structure example 3 described above, each first opening 18 is formed without being divided in the y direction. However, when the area of the display unit itself is relatively large, the lead lines connecting the plurality of display units to each other are formed. The electrode resistance may increase when the total distance is long or when the line width of the electrode is narrow. In such a case, it is preferable to arrange a plurality of first openings 18 separated from each other in the y direction. In this case, each first opening 18 has a recess in the longitudinal direction in plan view. You don't have to.

  FIG. 11 is a plan view of the first opening and the second opening of Structural Example 4. Each of the second openings 19 has the same structure as that of the first structural example. The difference from the structure example 1 is the shape of each first opening 18 in plan view. Specifically, the first openings 18 are arranged separately from each other in the y direction (longitudinal direction), and have a constant slit width without having a portion having a different slit width or a slope-like portion. It has become. Also in this case, it is preferable that the mutual interval between the first openings 18 adjacent in the longitudinal direction (y direction) is set smaller than the slit width. In the example shown in FIG. 11, the length in the longitudinal direction (slit length) of each first opening 18 and the length in the longitudinal direction of each second opening 19 are set to be equal, but they may not be equal. Moreover, the longitudinal direction length of each 1st opening part 18 may differ. In other words, the arrangement intervals of the connecting portions provided between the first openings 18 in the longitudinal direction may not be equal.

(Structural example 5)
In the structural examples 1 to 4 described above, the plurality of first openings 18 provided in the first electrode 13 have the same shape, but different shapes may be mixed. Similarly, the plurality of second openings 19 provided in the second electrode 14 have the same shape, but different shapes may be mixed.

  FIG. 12 is a plan view of the first opening and the second opening of Structural Example 5. In the plurality of first openings 18 provided in the first electrode 13, the shape described as the first structural example and the substantially rectangular shape having a constant slit width are mixed, and they are in the longitudinal direction. They are arranged alternately in the (y direction). Similarly, the plurality of second openings 19 provided in the second electrode 14 include a mixture of the shape described as the first structural example and a substantially rectangular shape having a constant slit width. Are alternately arranged in the longitudinal direction (y direction). Also in this case, it is preferable that the mutual interval between the first openings 18 adjacent in the longitudinal direction (y direction) is set smaller than the slit width. These are only examples, and each first opening 18 and each second opening 19 may be a mixture of the structure example 2 and the substantially rectangular shape having a constant slit width. The example 1 and the structure example 2 may be mixed. In addition, the arrangement in the longitudinal direction in those cases does not necessarily have to be alternated one by one. Moreover, the slit length of each opening part does not need to be equal. Furthermore, the center of gravity positions in the y direction of the first openings 18 and the second openings 19 are shifted from each other by a half pitch, but this is also an example, and the shift pitch can be arbitrarily set. It does not have to be.

(Structure Example 6)
In each of the structural examples described above, when a recess is provided in each opening in plan view, the recess is provided on both side edges along the longitudinal direction. However, the recess may be provided only on one edge.

  FIG. 13 is a plan view of the first opening and the second opening of Structural Example 6. In the plurality of first openings 18 provided in the first electrode 13, there are a mixture of a recess having the shape described as the first structural example 1 only at one edge and one having the same slit width. The same applies to the plurality of second openings 19 provided in the second electrode 14. In each of the first openings 18 and each of the second openings 19, it is arbitrary which edge is provided with the recessed portion, and the edge provided on the right edge and the left edge in the drawing are provided. May be mixed. Further, each first opening 18 may have a long shape that is not divided.

  In addition, this invention is not limited to the content of embodiment mentioned above, In the range of the summary of this invention, it can change and implement variously. For example, in the structural examples 2 to 6 described above, the edges of the slope-shaped portions of the first openings and the second openings are linear, but the edges are not necessarily linear and are curved. It may be a shape, or a bent line connecting a plurality of line segments.

  In addition, when there are a plurality of display units, the first opening 18 and the second opening 19 having different structural examples may be provided for each display unit. As a result, even in a display portion having a complicated structure (for example, a reverse display portion), good display uniformity can be obtained without increasing the aperture ratio and causing defects such as disconnection and orientation failure.

  In the above-described embodiments, the liquid crystal display device using the vertically aligned liquid crystal layer has been described, but the present invention is not limited to this. The liquid crystal molecules are horizontally aligned on the substrate surface, the alignment direction of the liquid crystal molecules at the approximate center in the layer thickness direction of the liquid crystal layer is substantially orthogonal to the longitudinal direction of each opening, and the approximate center of the liquid crystal layer in the layer thickness direction The present invention can also be applied to a liquid crystal display device using a liquid crystal layer having a pretilt angle of approximately 0 ° when no voltage is applied to liquid crystal molecules.

11: 1st substrate 12: 2nd substrate 13: 1st electrode 14: 2nd electrode 15: 1st alignment film 16: 2nd alignment film 17: Liquid crystal layer 18: 1st opening part 18a: Slit width is relatively Large portion 18b: A portion having a relatively small slit width 18c: A portion having a slope 19: Second opening 19a: A portion having a relatively large slit width 19b: A portion having a relatively small slit width 19c: A portion having a slope 21: First polarizing plate 22: Second polarizing plate 23, 24: Optical compensator

Claims (5)

A first substrate and a second substrate disposed opposite to each other;
A first electrode having a plurality of first openings and provided on one side of the first substrate;
A second electrode having a plurality of second openings and provided on one side of the second substrate;
A liquid crystal layer provided between each surface of the first substrate and the second substrate;
Including
The plurality of first openings have a constant slit width in a plan view, and are separated from each other along a first direction parallel to the longitudinal direction,
The plurality of second openings have recesses in at least one of both side edges along the longitudinal direction in plan view, and are separated from each other along the first direction parallel to the longitudinal direction. Has been
The plurality of first openings and the plurality of second openings have the same slit length.
Liquid crystal display device. A first substrate and a second substrate disposed opposite to each other;
A first electrode having a plurality of first openings and provided on one side of the first substrate;
A second electrode having a plurality of second openings and provided on one side of the second substrate;
A liquid crystal layer provided between each surface of the first substrate and the second substrate;
Including
The plurality of first openings include a third opening having a constant slit width in plan view and a fourth opening having a recess in at least one of both side edges along the longitudinal direction in plan view. The third opening and the fourth opening are separated from each other along a first direction parallel to the longitudinal direction, and are alternately arranged one by one.
The plurality of second openings include a fifth opening having a constant slit width in plan view and a sixth opening having a recess in at least one of both side edges along the longitudinal direction in plan view, The fifth opening and the sixth opening are separated from each other along a first direction parallel to the longitudinal direction and are alternately arranged one by one.
Liquid crystal display device. The plurality of first openings and the plurality of second openings are arranged such that the center-of-gravity positions in the longitudinal direction are shifted from each other in the first direction.
The liquid crystal display device according to claim 2 . The plurality of first openings and the plurality of second openings have the same slit length.
The liquid crystal display device according to claim 2 .   A first substrate and a second substrate disposed opposite to each other;
  A first electrode having a plurality of first openings and provided on one side of the first substrate;
  A second electrode having a plurality of second openings and provided on one side of the second substrate;
  A liquid crystal layer provided between each surface of the first substrate and the second substrate;
Including
  The plurality of first openings have a constant slit width in a plan view, and are separated from each other along a first direction parallel to the longitudinal direction,
  The plurality of second openings have recesses in at least one of both side edges along the longitudinal direction in plan view, and are separated from each other along the first direction parallel to the longitudinal direction. Has been
  The plurality of first openings and the plurality of second openings are arranged such that the center-of-gravity positions in the longitudinal direction are shifted from each other in the first direction.
  Liquid crystal display device.