JP6306870B2 - Liquid crystal display - Google Patents

Description

  The present invention relates to a liquid crystal display device including an electrode having a plurality of openings.

  As an example of a VA (Vertical Alignment) type liquid crystal display element, Japanese Patent Laying-Open No. 2012-63711 (Patent Document 1) discloses a first electrode arranged to display a predetermined display pattern in a display area, A second electrode opposed to the first electrode; and a liquid crystal layer provided between the first electrode and the second electrode and having a vertical alignment when no voltage is applied. A liquid crystal display element in which a plurality of regularly arranged L-shaped slits are formed in any one of the electrodes is disclosed. In this liquid crystal display element, each of the L-shaped slits is an area where at least the first electrode and the second electrode overlap, and the electrode provided with the slit is a plurality of rectangular sub-pixel electrodes and adjacent sub-pixel electrodes. It is formed so as to be divided into a plurality of rectangular sub-pixel electrodes having connection portions for connecting to the pixel electrodes at three corners. According to this prior art, it is said that the alignment disorder of the liquid crystal display element in the VA type liquid crystal display element can be reduced by reducing the alignment disorder when the voltage is applied.

  By the way, for example, in a segment display type liquid crystal display device having a predetermined display unit for characters and pictures, a display unit for characters and the like is formed by a region where a segment electrode on one substrate and a common electrode on the other substrate overlap. When the above-described alignment control technology is applied to such a segment display type liquid crystal display device, pattern missing occurs intensively at a specific edge among several edges constituting the display unit, There is a disadvantage in that a portion that should originally be a straight line or a curved line is visually recognized in a jagged shape, and the outline shape of the display unit is disturbed. Similar inconveniences may also occur in, for example, a dot matrix display type liquid crystal display device in which each pixel has a bent edge.

JP 2012-63711 A

  A specific aspect of the present invention has an object to provide a technique capable of making it difficult to cause disturbance in the outline shape of a display portion in a liquid crystal display device using an electrode having a plurality of openings.

(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; A second electrode provided on the second substrate; and (d) a liquid crystal layer disposed between the first substrate and the second substrate, and (e) the first electrode and the second electrode, A display portion is defined in the overlapping region, and (f) at least one of the first electrode and the second electrode has at least a plurality of first openings and a plurality of first electrodes arranged in the display portion in plan view. (G) Each of the plurality of first openings has a shape in which two branches extending in different directions are coupled to each other at one end in a plan view. The angle formed by the extending direction of each of the two branches is greater than 0 ° and smaller than 180 °. Ku, (h) each of the plurality of second openings, in plan view, has a plurality of respective substantially the same shape of the first opening, and with each of the plurality of first openings Are arranged in different orientations, and (i) the plurality of first openings and the plurality of second openings are alternately arranged one by one along at least one direction in plan view. It is a liquid crystal display device.

(2) A liquid crystal display device according to another aspect of the present invention includes: (a) a first substrate and a second substrate disposed to face each other; (b) a first electrode provided on the first substrate; 2) a second electrode provided on the second substrate; and (d) a liquid crystal layer disposed between the first substrate and the second substrate, and (e) the first electrode and the second electrode. And (f) at least one of the first electrode and the second electrode has at least a plurality of first openings and a plurality of first openings disposed in the display portion in a plan view. A second opening , a plurality of third openings, and a plurality of fourth openings ; (g) each of the plurality of first openings extends in different directions in plan view; one of the branches of which have a bound form in each end, (h) said plurality of second openings, the double Each of the third openings and the plurality of fourth openings in plan view, has a plurality of respective substantially the same shape of the first opening, (i) prior Symbol plurality of first opening parts, each of the plurality of second openings, said plurality of third openings and said plurality of fourth openings are disposed at different orientations, (j) said plurality of first openings, the second openings plurality of, at least three respective openings of the four kinds of the plurality of third openings and said plurality of fourth openings in plan view, one along at least one direction It is a liquid crystal display device arranged alternately.

  According to the configuration according to the above (1) or (2), it is possible to make it difficult for the contour shape of the display unit to be disturbed in a liquid crystal display device using an electrode having a plurality of openings.

  (3) In the liquid crystal display device of the above (1), it is also preferable that the lengths of the two branch portions are substantially equal.

  (4) In the liquid crystal display device according to (2), the lengths of two of the three branches are substantially equal, and one of the other branches is relative to the two branches. It is also preferable that it is long.

  In the liquid crystal display devices according to the above (1) to (4), the display unit is preferably a segment display type display unit that directly forms characters or designs to be displayed.

FIG. 1 is a cross-sectional view showing a basic structure of a liquid crystal display device according to an embodiment. FIG. 2A is a plan view showing the first embodiment of the display unit, and FIG. 2B is a partially enlarged view of a part of the display unit shown in FIG. FIG. 3A is a plan view showing Comparative Example 1 of the display unit, and FIG. 3B is a partially enlarged view of part b of the display unit shown in FIG. FIG. 4A is a plan view showing a second embodiment of the display unit, and FIG. 4B is a partially enlarged view of part c of the display unit shown in FIG. FIG. 5A is a plan view showing a third embodiment of the display unit, and FIG. 5B is a partially enlarged view of a portion d of the display unit shown in FIG. FIG. 6A is a plan view showing a fourth embodiment of the display unit, and FIG. 6B is a partially enlarged view of part e of the display unit shown in FIG. 6A. FIG. 7A is a plan view showing a comparative example 2 of the display unit, and FIG. 7B is a partially enlarged view of a part f of the display unit shown in FIG. 7A. FIG. 8A is a plan view showing a fifth embodiment of the display unit, and FIG. 8B is a partially enlarged view of the g part of the display unit shown in FIG. 8A. FIG. 9A is a plan view showing a sixth embodiment of the display unit, and FIG. 9B is a partially enlarged view of h part of the display unit shown in FIG. 9A. FIG. 10A to FIG. 10E are plan views each showing a modification of the opening.

  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 where electrodes overlap with each other 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 ratio of about 50% or less 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 13 is provided on one surface side of the first substrate 11. Similarly, the second 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 openings (slits) 18.

  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. The alignment films 15 and 16 are 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. 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.

  FIG. 2A is a plan view showing the first embodiment of the display unit, and FIG. 2B is a partially enlarged view of a part of the display unit shown in FIG. The display portion of the example shown in FIG. 2A is for displaying the English letter “A”, and the shape of the English letter “A” is defined by the overlapping region of the first electrode 11 and the second electrode 12. (The same applies below). As shown in the drawing, a plurality of openings 18 are arranged in a matrix along the X direction and the Y direction inside the display unit.

  As shown in FIG. 2 (B), each opening 18 of the first embodiment is configured by connecting a branch extending in the X direction and a branch extending in the Y direction at one end side of each other. It has an L shape or an inverted L shape. For convenience of explanation, the L-shaped opening is referred to as “opening 18a”, and the inverted L-shaped opening is referred to as “opening 18b”.

  In the display portion, a plurality of openings 18a arranged in an L shape are arranged in a line along the Y direction, and a plurality of openings 18b arranged in an inverted L shape are also arranged in a row along the Y direction. Are lined up. And the row | line | column which consists of several opening part 18a and the row | line | column which consists of several opening part 18b are alternately arrange | positioned 1 row at a time along the X direction (left-right direction of illustration). Further, branch portions along the X direction in each of the opening 18a and the opening 18b adjacent in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same. Further, the branch portions along the Y direction in the openings 18a adjacent to each other in the Y direction and the openings 18b are arranged in a straight line as a whole with the positions in the X direction being substantially the same.

  Further, it is surrounded by two branches of one opening 18a, one branch along the X direction of the other opening 18a, and one branch along the Y direction of one opening 18b. Each of the areas 19a has a substantially rectangular shape as illustrated. Further, it is surrounded by two branches of one opening 18b, one branch along the X direction of the other opening 18b, and one branch along the Y direction of one opening 18a. Each of the areas 19b has a substantially rectangular shape as illustrated. Further, in this example, the region 19a and the region 19b have substantially the same shape and the same area.

  Here, an example of the size of the display unit and each opening in the first embodiment will be described. For example, the display unit can have a vertical length of about 3.2 mm and a horizontal length of about 2.8 mm. Moreover, each opening part 18a and each opening part 18b can set the length of each branch part to 0.075 mm, and can set the width of a branch part to 0.01 mm. Furthermore, regarding the arrangement pitch of each opening 18a and each opening 18b, both the X direction and the Y direction can be set to a pitch of 0.085 mm. The same applies to other embodiments described later.

  FIG. 3A is a plan view showing Comparative Example 1 of the display unit, and FIG. 3B is a partially enlarged view of part b of the display unit shown in FIG. As shown in FIG. 3B, only a plurality of L-shaped openings 18c are arranged in a matrix in the display unit of Comparative Example 1. Specifically, the plurality of openings 18c are regularly arranged along each of the X direction and the Y direction. Further, the branch portions along the X direction of the openings 18c adjacent to each other in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same. Similarly, the branch portions along the Y direction between the adjacent opening portions 18c in the Y direction are arranged in a straight line as a whole with the positions in the X direction being substantially the same.

  Comparing the edge 30 of the display part in each of the first embodiment and the comparative example 1, it can be seen that the number of pattern missing parts 31 at the edge 30 of the oblique line arranged on the right side is greatly different. Specifically, in the edge 30 of the display portion of the first embodiment, only one pattern missing portion 31 exists in the range shown in FIG. It can be seen that there are four pattern missing portions 31 in the range shown in FIG. In the first embodiment, the L-shaped openings 18a and the inverted L-shaped openings 18b having the same shape and different directions are alternately arranged in the X direction. This is because the portions where the pattern missing portions 31 are generated are dispersed.

  FIG. 4A is a plan view showing a second embodiment of the display unit, and FIG. 4B is a partially enlarged view of part c of the display unit shown in FIG. The difference from the first embodiment is the arrangement of the openings 18a and 18b. Specifically, in the display unit, the L-shaped openings 18a are arranged in a line along the X direction, and the inverted L-shaped openings 18b are also arranged in a line along the X direction. . The rows composed of the plurality of openings 18a and the rows composed of the plurality of openings 18b are alternately arranged one by one along the Y direction (the vertical direction in the drawing). Further, branch portions along the Y direction in each of the opening 18a and the opening 18b adjacent in the Y direction are arranged in a straight line as a whole with the positions in the X direction being substantially the same. Furthermore, the branch portions along the X direction in the openings 18a adjacent to each other in the X direction and the openings 18b are arranged in a straight line as a whole with the positions in the Y direction being substantially the same.

  Further, it is surrounded by two branches of one opening 18a, one branch along the Y direction of the other opening 18a, and one branch along the X direction of one opening 18b. Each of the areas 19c is substantially rectangular as shown in the figure. Further, it is surrounded by two branches of one opening 18b, one branch along the Y direction of the other opening 18b, and one branch along the X direction of one opening 18a. Each of the areas 19d has a substantially rectangular shape as illustrated. Further, in this example, the region 19c and the region 19d have substantially the same shape and the same area.

  Also in the second embodiment, the effect of reducing the occurrence of the pattern missing portion 31 at the edge 30 of the display portion can be obtained as in the first embodiment.

  FIG. 5A is a plan view showing a third embodiment of the display unit, and FIG. 5B is a partially enlarged view of a portion d of the display unit shown in FIG. As shown in FIG. 5 (B), each opening 18 of the third embodiment is configured by connecting a branch extending in the X direction and a branch extending in the Y direction at one end side of each other. Each has the same shape and has four types of openings arranged in different directions. Specifically, each opening 18 has an L shape, an inverted L shape rotated 90 ° clockwise, an inverted L shape rotated 180 ° clockwise, and an inverted L shape rotated 270 ° clockwise. Four types of openings are included. Here, for convenience of explanation, the L-shaped opening is referred to as “opening 18a”, the inverted L-shaped opening rotated 90 ° is referred to as “opening 18b”, and the opening rotated 180 ° is referred to as “opening 18b”. This is called “opening 18d”, and the opening rotated by 270 ° is called “opening 18e”.

  In the display unit, the openings 18a and the openings 18b are arranged in a line along the X direction, and are alternately arranged one by one. Similarly, in the display unit, each opening 18d and each opening 18e are arranged in a line along the X direction, and both are alternately arranged one by one. The rows composed of the openings 18a and 18b and the rows composed of the openings 18d and 18e are alternately arranged one by one along the Y direction (the vertical direction in the drawing).

  From another point of view, in the display unit, the openings 18a and the openings 18e are arranged in a line along the Y direction, and the two are alternately arranged one by one. Similarly, in the display unit, the openings 18b and the openings 18d are arranged in a line along the Y direction, and are alternately arranged one by one. The rows made of the openings 18a and 18e and the rows made of the openings 18b and 18d are alternately arranged one by one along the X direction (the left-right direction in the drawing).

  Each opening 18a is arranged in a straight line as a whole, with the positions in the X direction of the branches along the Y direction being substantially the same. The openings 18a are arranged in a straight line as a whole with the positions of the branches in the Y direction substantially the same along the X direction. The same applies to each opening 18b, each opening 18d, and each opening 18e. Also in the third embodiment, two branches of any one opening, one branch along the X direction of the other opening, and the Y direction of one opening. Each region surrounded by one branch portion is substantially rectangular as shown in the figure, and has substantially the same shape and area.

  Also in the third embodiment, the effect of reducing the occurrence of the pattern missing portion 31 at the edge 30 of the display portion can be obtained as in the first embodiment.

  FIG. 6A is a plan view showing a fourth embodiment of the display unit, and FIG. 6B is a partially enlarged view of part e of the display unit shown in FIG. 6A. As shown in the drawing, a plurality of openings 18 are arranged in a matrix along the X direction and the Y direction inside the display unit. Specifically, as shown in FIG. 6B, each opening 18 of the fourth embodiment has a relatively long branch extending in the X direction and two relatively short branches extending in the Y direction. Are coupled to each other at one end side, and have a T-shape or an inverted T-shape as a whole. For convenience of explanation, the T-shaped opening is referred to as “opening 18f” and the inverted T-shaped opening is referred to as “opening 18g”.

  In the display section, a plurality of openings 18f arranged in a T shape are arranged in a line along the Y direction, and a plurality of openings 18g arranged in an inverted T shape are also arranged in a line along the Y direction. Are lined up. And the row | line | column which consists of several opening part 18f and the row | line | column which consists of several opening part 18g are alternately arrange | positioned 1 row at a time along the X direction (left-right direction of illustration). Further, the branch portions along the X direction of the adjacent opening portions 18f in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same. Similarly, the branch portions along the X direction of the openings 18g adjacent to each other in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same. Further, the branches along the Y direction in the openings 18f adjacent to each other in the Y direction and the openings 18g are arranged in a straight line as a whole with the positions in the X direction being substantially the same.

  In addition, a region 19f surrounded by one of the short branches along the X direction and a part of the long branch along the Y direction of each of the pair of openings 18f and 18g is substantially as illustrated. It is rectangular. In addition, each of the two openings 18f and the two openings 18g is surrounded by a part of each of the short branches along the X direction and a part of each of the long branches along the Y direction. Each 19g has a substantially rectangular shape as shown in the figure. Further, in this example, the region 19f and the region 19g have substantially the same shape and the same area.

  Here, an example of the size of the display part and each opening part in 4th Embodiment is demonstrated. For example, the display unit can have a vertical length of about 3.2 mm and a horizontal length of about 2.8 mm. Further, the length of two short branches of each opening 18f and each opening 18g can be 0.13 mm, and the length of one long branch can be 0.14 mm. Further, regarding the arrangement pitch of the openings 18f and 18g, both the X direction and the Y direction can be set to a 0.16 mm pitch. The same applies to other embodiments described later.

  FIG. 7A is a plan view showing a comparative example 2 of the display unit, and FIG. 7B is a partially enlarged view of a part f of the display unit shown in FIG. 7A. As shown in FIG. 7B, only a plurality of T-shaped openings 18h are arranged in a matrix in the display unit of Comparative Example 2. Specifically, the plurality of openings 18h are arranged in a line along each of the X direction and the Y direction. In addition, the branches along the X direction between the adjacent opening portions 18h in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same. Similarly, the branches along the Y direction between the adjacent opening portions 18h in the Y direction are arranged in a straight line as a whole with the positions in the X direction being substantially the same.

  Comparing the edge 30 of the display part in each of the fourth embodiment and the comparative example 2, it can be seen that the number of pattern missing parts 31 in the diagonal line edges 30 respectively arranged on the inner left and right sides is greatly different. Specifically, in the edge 30 of the display unit of the fourth embodiment, there are only two pattern missing parts 31 in the range shown in FIG. 6B, whereas in the edge 30 of the display unit of Comparative Example 2, It can be seen that there are four pattern missing portions 31 in the range shown in FIG. This is because, in the fourth embodiment, the T-shaped openings 18f and the inverted L-shaped openings 18g are alternately arranged in the X direction. This is due to the fact that the locations where this occurs are dispersed. On the other hand, in Comparative Example 2, the probability of generating the pattern chipped portion 31 by obliquely intersecting each opening and the display unit edge is twice that in Comparative Example 1 described above, and thus the pattern chipped portion 31 tends to increase. Will increase.

  FIG. 8A is a plan view showing a fifth embodiment of the display unit, and FIG. 8B is a partially enlarged view of the g part of the display unit shown in FIG. 8A. As shown in FIG. 8B, each opening 18 of the fifth embodiment is T-shaped, T-shaped rotated 90 ° clockwise, T-shaped rotated 180 ° clockwise, clockwise. Four T-shaped openings rotated by 270 °. For convenience of explanation, the T-shaped opening is referred to as “opening 18f”, the opening rotated 90 ° is referred to as “opening 18i”, and the opening rotated 180 ° is referred to as “opening 18g”. The opening rotated by 270 ° is referred to as “opening 18j”.

  Specifically, in the display unit, the openings 18f, the openings 18g, the openings 18i, and the openings 18j are arranged in a line along the Y direction. In the X direction, the rows of the openings 18f, the rows of the openings 18g, the rows of the openings 18j, and the rows of the openings 18i are repeatedly arranged. Further, branch portions along the X direction of the openings 18f adjacent in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same, and in the Y direction of the openings 18f adjacent in the Y direction. The branches along the lines are arranged in a straight line as a whole with the positions in the X direction being substantially the same. The same applies to each opening 18g, each opening 18i, and each opening 18j.

  In addition, a region 19f surrounded by one of the short branches along the X direction and a part of the long branch along the Y direction of each of the pair of openings 18f and 18g is substantially as illustrated. It is rectangular. In addition, each of the two openings 18f and the two openings 18g is surrounded by a part of each of the short branches along the X direction and a part of each of the long branches along the Y direction. Each 19g has a substantially rectangular shape as shown in the figure. Further, in this example, the region 19f and the region 19g have substantially the same shape and the same area. Similarly, the region surrounded by any two openings or each branch of any four openings is substantially rectangular as shown in the figure, and has substantially the same shape and shape as the above-described regions 19f and 19g. It is an area.

  Also in the fifth embodiment, the effect of reducing the occurrence of the pattern missing portion 31 at the edge 30 of the display portion can be obtained as in the first embodiment.

  FIG. 9A is a plan view showing a sixth embodiment of the display unit, and FIG. 9B is a partially enlarged view of h part of the display unit shown in FIG. 9A. In the sixth embodiment, the arrangement pattern of the openings 18f, 18g, 18i, and 18j in the fifth embodiment described above is changed. Specifically, in the Y direction, each opening 18f and each opening 18i are alternately arranged in a line along the Y direction, and each opening 18g and each opening 18j is Y. Along the direction, the lines are alternately arranged in a line, and these lines are alternately arranged in the X direction. On the other hand, in the X direction, each opening 18f and each opening 18j are alternately arranged in a line along the X direction, and each opening 18g and each opening 18i are in the X direction. 1 are alternately arranged in a line along each of the lines, and these lines are alternately arranged in the Y direction.

  Further, branch portions along the X direction of the openings 18f adjacent in the X direction are arranged in a straight line as a whole with the positions in the Y direction being substantially the same, and in the Y direction of the openings 18f adjacent in the Y direction. The branches along the lines are arranged in a straight line as a whole with the positions in the X direction being substantially the same. The same applies to each opening 18g, each opening 18i, and each opening 18j. Also in the sixth embodiment, any two openings, any three openings, or a region surrounded by each branch of any four openings is substantially rectangular as illustrated, They are almost the same shape and area.

  Also in the sixth embodiment, the effect of reducing the occurrence of the pattern missing portion 31 at the edge 30 of the display portion can be obtained as in the first embodiment.

  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 each of the above-described embodiments, the L-shaped or T-shaped opening is used as a basic shape and the openings whose directions are changed are combined. However, the basic shape of each opening is not limited thereto. Specifically, as shown in FIG. 10 (A), two branches are combined so that the angle formed between the respective longitudinal directions becomes an acute angle, or two branches as shown in FIG. 10 (B). A shape in which the angles formed by the respective longitudinal directions are obtuse may be used as the basic shape of each opening. Further, as shown in FIG. 10C, a Y shape in which three branches are coupled at one end may be used as the basic shape of each opening. As shown in FIG. 10D, each opening has a shape in which three branches are combined so that the angle formed by the longitudinal direction of one of the branches and the longitudinal direction of the other two branches is an acute angle. It is good also as a basic shape of a part. Also, as shown in FIG. 10 (E), of the three branches, the angle formed by the two branches in the longitudinal direction is a right angle, and the longitudinal direction of the other branch and the two branches. A shape in which the angles formed with the respective longitudinal directions are combined so as to form an obtuse angle may be used as the basic shape of each opening. Moreover, the edge of each branch part may be bent or may be formed in a curved shape.

  In the above-described embodiment, the segment display type liquid crystal display device has been exemplified. However, the present invention can also be applied to a dot matrix display type liquid crystal display device. In particular, by applying the present invention to a dot matrix display type liquid crystal display device in which the shape of each pixel is not rectangular but includes a bent edge, disturbance of the contour shape of each pixel is effectively suppressed. be able to.

11: first substrate 12: second substrate 13: first electrode 14: second electrode 15: first alignment film 16: second alignment film 17: liquid crystal layer 18, 18a, 18b, 18c, 18d, 18e, 18f, 18g, 18h, 18i, 18j: Openings 19a, 19b, 19c, 19d, 19f, 19g, 19i, 19j: Region 21: First polarizing plate 22: Second polarizing plate 23, 24: Optical compensator 30: Display unit Edge 31: Pattern missing part

Claims (5)

A first substrate and a second substrate disposed opposite to each other;
A first electrode provided on the first substrate;
A second electrode provided on the second substrate;
A liquid crystal layer disposed between the first substrate and the second substrate;
Including
A display portion is defined in a region where the first electrode and the second electrode overlap;
At least one of the first electrode and the second electrode has at least a plurality of first openings and a plurality of second openings arranged in the display unit in plan view,
Each of the plurality of first openings has a shape in which two branches extending in different directions are coupled to each other in plan view, and each of the two branches extends. The angle formed by the direction is larger than 0 ° and smaller than 180 °,
Each of the plurality of second openings has substantially the same shape as each of the plurality of first openings in a plan view, and is disposed in a direction different from each of the plurality of first openings. Has been
The plurality of first openings and the plurality of second openings are alternately arranged one by one along at least one direction in plan view.
Liquid crystal display device. A first substrate and a second substrate disposed opposite to each other;
A first electrode provided on the first substrate;
A second electrode provided on the second substrate;
A liquid crystal layer disposed between the first substrate and the second substrate;
Including
A display portion is defined in a region where the first electrode and the second electrode overlap;
At least one of the first electrode and the second electrode has at least a plurality of first openings , a plurality of second openings , a plurality of third openings, and a plurality of second openings arranged in the display unit in plan view . Has 4 openings ,
Each of the plurality of first openings has a shape in which three branches extending in different directions are coupled at one end in plan view,
Each of the plurality of second openings , the plurality of third openings, and the plurality of fourth openings has substantially the same shape as each of the plurality of first openings in a plan view.
The first opening of the front Symbol plurality, the second opening of the plurality, each of the plurality of third openings and said plurality of fourth openings are disposed at different orientations,
At least three of the plurality of first openings , the plurality of second openings , the plurality of third openings, and the plurality of fourth openings are at least in plan view. Arranged one by one along one direction,
Liquid crystal display device. The lengths of the two branches are substantially equal;
The liquid crystal display device according to claim 1. Two branches of the three branches are substantially equal in length, and one other branch is relatively longer than the two branches.
The liquid crystal display device according to claim 2. The display unit is a segment display type display unit that directly forms characters or designs to be displayed.
The liquid crystal display device according to claim 1.

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