Liquid crystal device

Abstract

The present embodiment aims to provide a liquid crystal device capable of suppressing moire. The liquid crystal device of the present embodiment is provided with a first liquid crystal cell, a second liquid crystal cell, a third liquid crystal cell, and a fourth liquid crystal cell, each of which is provided with: first and second electrodes between a first transparent substrate and a first alignment film and to which mutually different voltages are applied; and third and fourth electrodes between a second transparent substrate and a second alignment film and to which mutually different voltages are applied, the first, second, third, and fourth electrodes of the first liquid crystal cell and the first, second, third, and fourth electrodes of the third liquid crystal cell having a first shape, and the first, second, third, and fourth electrodes of the second liquid crystal cell and the first, second, third, and fourth electrodes of the fourth liquid crystal cell having a second shape different from the first shape.

Description

LCD devices Technical Field

[0001] The embodiments of the present invention relate to liquid crystal devices. Background Technology

[0002] In recent years, light control devices using liquid crystal cells have been proposed. Such devices control the orientation state of liquid crystal molecules or the refractive index distribution of the liquid crystal layer, causing light (p-polarized light, s-polarized light) transmitted through the liquid crystal layer to refract. In one example, a technique has been proposed where, in an illumination device equipped with multiple liquid crystal lenses, the strip electrodes used to form each liquid crystal lens are formed at offset positions, thereby suppressing unevenness.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Application Publication No. 2010-230887 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] The purpose of this invention is to provide a liquid crystal device capable of suppressing moiré patterns.

[0008] Technical solutions for solving the problem

[0009] One embodiment of the liquid crystal device includes:

[0010] First liquid crystal unit;

[0011] The second liquid crystal unit overlaps with the first liquid crystal unit;

[0012] The third liquid crystal unit overlaps with the second liquid crystal unit; and

[0013] The fourth liquid crystal unit overlaps with the third liquid crystal unit.

[0014] The first liquid crystal unit to the fourth liquid crystal unit each have:

[0015] First transparent substrate;

[0016] First orientation film;

[0017] The first electrode and the second electrode are located between the first transparent substrate and the first alignment film, are arranged at a distance from each other, and are subjected to different voltages.

[0018] Second transparent substrate;

[0019] Second orientation film;

[0020] The third and fourth electrodes are located between the second transparent substrate and the second alignment film, spaced apart, and are subjected to different voltages; and

[0021] A liquid crystal layer is located between the first alignment film and the second alignment film.

[0022] The first, second, third, and fourth strip electrodes of the first liquid crystal unit and the first, second, third, and fourth strip electrodes of the third liquid crystal unit have a first shape.

[0023] The first, second, third, and fourth strip electrodes of the second liquid crystal unit and the first, second, third, and fourth strip electrodes of the fourth liquid crystal unit have a second shape that is different from the first shape.

[0024] Additionally, one embodiment of the liquid crystal device includes:

[0025] First liquid crystal unit;

[0026] The second liquid crystal unit overlaps with the first liquid crystal unit;

[0027] The third liquid crystal unit overlaps with the second liquid crystal unit; and

[0028] The fourth liquid crystal unit overlaps with the third liquid crystal unit.

[0029] The first liquid crystal unit to the fourth liquid crystal unit each have:

[0030] First transparent substrate;

[0031] First orientation film;

[0032] The first electrode and the second electrode are located between the first transparent substrate and the first alignment film, are arranged at a distance from each other, and are subjected to different voltages.

[0033] Second transparent substrate;

[0034] Second orientation film;

[0035] The third and fourth electrodes are located between the second transparent substrate and the second alignment film, spaced apart, and are subjected to different voltages; and

[0036] A liquid crystal layer is located between the first alignment film and the second alignment film.

[0037] The first liquid crystal unit to the fourth liquid crystal unit respectively have a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode with a tortuous shape.

[0038] One embodiment of the liquid crystal device includes:

[0039] First liquid crystal unit;

[0040] The second liquid crystal unit overlaps with the first liquid crystal unit;

[0041] The third liquid crystal unit overlaps with the second liquid crystal unit; and

[0042] The fourth liquid crystal unit overlaps with the third liquid crystal unit.

[0043] The first liquid crystal unit to the fourth liquid crystal unit each have:

[0044] First transparent substrate;

[0045] First orientation film;

[0046] The first electrode and the second electrode are located between the first transparent substrate and the first alignment film, are arranged at a distance from each other, and are subjected to different voltages.

[0047] Second transparent substrate;

[0048] Second orientation film;

[0049] The third and fourth electrodes are located between the second transparent substrate and the second alignment film, spaced apart, and are subjected to different voltages; and

[0050] A liquid crystal layer is located between the first alignment film and the second alignment film.

[0051] The first electrode of the first liquid crystal unit, the second electrode of the second liquid crystal unit, the first electrode of the third liquid crystal unit, and the second electrode of the fourth liquid crystal unit have a first shape.

[0052] The second strip electrode of the first liquid crystal unit, the first strip electrode of the second liquid crystal unit, the second strip electrode of the third liquid crystal unit, and the first strip electrode of the fourth liquid crystal unit have a second shape that is different from the first shape.

[0053] Invention Effects

[0054] According to this embodiment, a liquid crystal device capable of suppressing moiré patterns can be provided. Attached Figure Description

[0055] Figure 1 is a perspective view of the liquid crystal device according to this embodiment.

[0056] Figure 2 is an exploded perspective view of the liquid crystal device shown in Figure 1.

[0057] Figure 3 is a perspective view that schematically represents the first liquid crystal cell in Figure 2.

[0058] Figure 4 is a diagram showing an example of the extension direction of each electrode constituting a liquid crystal device.

[0059] Figure 5A is a top view of the second liquid crystal cell.

[0060] Figure 5B is a top view of the second liquid crystal cell.

[0061] Figure 6 is a schematic diagram of a first liquid crystal cell in the off state where no electric field is formed in the liquid crystal layer.

[0062] Figure 7 is a schematic diagram of a first liquid crystal cell in which an electric field is formed in the liquid crystal layer and the cell is in a conductive state.

[0063] Figure 8 is a top view showing another example of the electrodes constituting a liquid crystal device.

[0064] Figure 9A is a top view of the second liquid crystal cell.

[0065] Figure 9B is a top view of the second liquid crystal cell.

[0066] Figure 10 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0067] Figure 11 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0068] Figure 12 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0069] Figure 13 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0070] Figure 14 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0071] Figure 15 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0072] Figure 16 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment.

[0073] Figure 17 is a top view showing another example of the electrodes in the liquid crystal device constituting this embodiment. Detailed Implementation

[0074] The various embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the disclosed content is merely illustrative, and appropriate modifications that are readily conceived by those skilled in the art while maintaining the spirit of the invention are naturally included within the scope of the present invention. Furthermore, to make the description clearer, the width, thickness, shape, etc., of various parts in the drawings are sometimes schematically represented compared to the actual form; however, these are merely examples and do not limit the interpretation of the present invention. Additionally, in this specification and the various drawings, elements that are identical to those described in previously appearing drawings are sometimes labeled with the same reference numerals, and detailed descriptions are appropriately omitted.

[0075] The following description, with reference to the accompanying drawings, details one embodiment of the liquid crystal device.

[0076] In this embodiment, the first direction X, the second direction Y, and the third direction Z are orthogonal to each other, but they may also intersect at an angle other than 90 degrees. The direction towards the tip of the arrow pointing towards the third direction Z is defined as up or above, and the direction opposite to the tip of the arrow pointing towards the third direction Z is defined as down or below. The first direction X, the second direction Y, and the third direction Z are sometimes also referred to as the X direction, the Y direction, and the Z direction, respectively.

[0077] Furthermore, in the cases referred to as "the second component above the first component" and "the second component below the first component," the second component may either be in contact with the first component or be located separately from the first component. In the latter case, a third component may also be located between the first component and the second component. On the other hand, in the cases referred to as "the second component above the first component" and "the second component below the first component," the second component is in contact with the first component.

[0078] Furthermore, assuming the observation position of the liquid crystal device is located at the leading edge of the arrow pointing to the third direction Z, the view taken from that position toward the XY plane defined by the first direction X and the second direction Y is called a top view. A cross-section of the liquid crystal device viewed on the XZ plane defined by the first direction X and the third direction Z, or on the YZ plane defined by the second direction Y and the third direction Z, is called a cross-sectional view.

[0079] Figure 1 is a perspective view of the liquid crystal device 1 according to this embodiment.

[0080] The liquid crystal device 1 includes a first liquid crystal unit 10, a second liquid crystal unit 20, a third liquid crystal unit 30, and a fourth liquid crystal unit 40. The liquid crystal device 1 according to this embodiment has two or more liquid crystal units, and is not limited to a configuration with four liquid crystal units as shown in the example in FIG1.

[0081] On the third direction Z, the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30 and the fourth liquid crystal unit 40 overlap sequentially when viewed from the light source side.

[0082] The light source LS, shown by the dashed line, is positioned opposite the first liquid crystal cell 10 in the third direction Z. The light source LS is preferably configured to emit collimated light, but a light source emitting diffused light may also be used. The emitted light from the light source LS passes sequentially through the first liquid crystal cell 10, the second liquid crystal cell 20, the third liquid crystal cell 30, and the fourth liquid crystal cell 40. As described later, the first liquid crystal cell 10, the second liquid crystal cell 20, the third liquid crystal cell 30, and the fourth liquid crystal cell 40 are configured to refract a portion of the polarization component of the incident light. Thus, by combining the liquid crystal device 1 and the light source LS, an illumination device capable of both light diffusion and convergence can be provided.

[0083] Figure 2 is an exploded perspective view of the liquid crystal device 1 shown in Figure 1.

[0084] The first liquid crystal unit 10 includes a first transparent substrate S11, a second transparent substrate S21, a liquid crystal layer LC1, and a sealing member SE1. The first transparent substrate S11 and the second transparent substrate S21 are bonded together by the sealing member SE1. The liquid crystal layer LC1 is held between the first transparent substrate S11 and the second transparent substrate S21 and is encapsulated by the sealing member SE1. An effective region AA1 capable of refracting incident light is formed on the inner side surrounded by the sealing member SE1.

[0085] In this specification, when viewing the first liquid crystal cell 10 from above, with a reference to a left-hand edge SY of the first transparent substrate S11, the direction orthogonal to edge SY is the first direction X. The direction parallel to edge SY is the second direction Y. Furthermore, with edge SY as a reference, the three o'clock direction in the XY plane, i.e., the direction of the arrow representing the first direction X, is set to 0°. Angles counterclockwise relative to the first direction X are represented by positive (+), and angles clockwise relative to the first direction X are represented by negative (-). The direction of the arrow representing the second direction Y corresponds to a 90° angle relative to the first direction X.

[0086] This correspondence in all directions can also be applied to other liquid crystal units (second liquid crystal unit 20, third liquid crystal unit 30, and fourth liquid crystal unit 40).

[0087] The first transparent substrate S11 has an extension EX1 that extends further outward than the second transparent substrate S21 along a first direction X, and an extension EY1 that extends further outward than the second transparent substrate S21 along a second direction Y. A flexible wiring substrate F, indicated by a dashed line, is connected to at least one of the extensions EX1 and EY1.

[0088] The second liquid crystal unit 20 includes a first transparent substrate S12, a second transparent substrate S22, a liquid crystal layer LC2, and a sealing member SE2. The effective area AA2 is formed on the inner side surrounded by the sealing member SE2.

[0089] The first transparent substrate S12 has an extension EX2 and an extension EY2. In the third direction Z, the extension EX2 overlaps with the extension EX1, and the extension EY2 overlaps with the extension EY1. At least one of the extensions EX2 and EY2 is connected to a flexible wiring substrate; however, the flexible wiring substrate is omitted from the illustrations of the other second to fourth liquid crystal cells 40.

[0090] The third liquid crystal unit 30 includes a first transparent substrate S13, a second transparent substrate S23, a liquid crystal layer LC3, and a sealing member SE3. The effective area AA3 is formed on the inner side surrounded by the sealing member SE3.

[0091] The first transparent substrate S13 has an extension EX3 and an extension EY3. In the third direction Z, the extension EY3 overlaps with the extension EY2. The extension EX3 does not overlap with the extension EX2, but is located on the opposite side of the extension EX2.

[0092] The fourth liquid crystal unit 40 includes a first transparent substrate S14, a second transparent substrate S24, a liquid crystal layer LC4, and a sealing member SE4. The effective area AA4 is formed on the inner side surrounded by the sealing member SE4.

[0093] The first transparent substrate S14 has an extension EX4 and an extension EY4. In the third direction Z, the extension EX4 overlaps with the extension EX3, and the extension EY4 overlaps with the extension EY3.

[0094] A transparent adhesive layer TA12 is disposed between the first liquid crystal cell 10 and the second liquid crystal cell 20. The transparent adhesive layer TA12 bonds the first transparent substrate S11 and the second transparent substrate S22.

[0095] A transparent adhesive layer TA23 is disposed between the second liquid crystal cell 20 and the third liquid crystal cell 30. The transparent adhesive layer TA23 bonds the first transparent substrate S12 and the second transparent substrate S23.

[0096] A transparent adhesive layer TA34 is disposed between the third liquid crystal cell 30 and the fourth liquid crystal cell 40. The transparent adhesive layer TA34 bonds the first transparent substrate S13 and the second transparent substrate S24.

[0097] The first transparent substrates S11 to S14 are each formed into a square shape and have the same size. For example, in the first transparent substrate S11, edge SX and edge SY are orthogonal to each other, and the length of edge SX is the same as the length of edge SY.

[0098] Therefore, when the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30 and the fourth liquid crystal unit 40 are bonded together, as shown in FIG1, the edges along the first direction X overlap each other, and the edges along the second direction Y also overlap each other.

[0099] Alternatively, the second substrate, which has a shape approximately the same as the shape of the light-transmitting area (the effective area described later), can be square, while the first substrate can be a polygonal shape other than square, such as a rectangle. Alternatively, a configuration in which either of the extensions of each liquid crystal cell is removed can also be used.

[0100] Next, the configuration of each liquid crystal cell will be described in more detail. Furthermore, the first liquid crystal cell 10, which constitutes the liquid crystal device 1, will be used as an example for the following description, but the configurations of the other second liquid crystal cells 20 to the fourth liquid crystal cells 40 are roughly the same as those of the first liquid crystal cell 10, except for the extension direction of the electrodes.

[0101] Figure 3 is a perspective view schematically showing the first liquid crystal unit 10 of Figure 2.

[0102] The first liquid crystal unit 10 includes a first band electrode E11A and a second band electrode E11B, a first alignment film AL11, a third band electrode E21A and a fourth band electrode E21B, and a second alignment film AL21 in the effective area AA1.

[0103] The first electrode E11A and the second electrode E11B are located between the first transparent substrate S11 and the first alignment film AL11, and are arranged at a distance from each other, extending in the same direction. The first electrode E11A and the second electrode E11B can either be in contact with the first transparent substrate S11, or an insulating film can be placed between them and the first transparent substrate S11. Alternatively, an insulating film can be placed between the first electrode E11A and the second electrode E11B, with the first electrode E11A located on a different layer than the second electrode E11B.

[0104] A plurality of first electrodes E11A and a plurality of second electrodes E11B are arranged and alternately configured along a first direction X. The plurality of first electrodes E11A are configured to be electrically connected to each other and are subjected to the same voltage. The plurality of second electrodes E11B are configured to be electrically connected to each other and are subjected to the same voltage. However, the voltage applied to the second electrodes E11B is controlled to be different from the voltage applied to the first electrodes E11A.

[0105] The first alignment film AL11 covers the first band electrode E11A and the second band electrode E11B. The alignment processing direction AD11 of the first alignment film AL11 is the first direction X. Furthermore, the alignment processing of each alignment film can be either rubbing or photo-alignment. The alignment processing direction is sometimes referred to as the rubbing direction. Generally, in the state where no voltage is applied to the liquid crystal layer (initial alignment state), the liquid crystal molecules located near the alignment film are initially aligned in a predetermined direction by the alignment limiting force along the alignment processing direction of the alignment film. That is, in the example shown here, the initial alignment direction of the liquid crystal molecules LM11 along the first alignment film AL11 is the first direction X. The alignment processing direction AD11 intersects the first band electrode E11A and the second band electrode E11B.

[0106] The third electrode E21A and the fourth electrode E21B are located between the second transparent substrate S21 and the second alignment film AL21, and are arranged at intervals, extending in the same direction. The third electrode E21A and the fourth electrode E21B can either be in contact with the second transparent substrate S21, or an insulating film can be placed between them and the second transparent substrate S21. Alternatively, an insulating film can be placed between the third electrode E21A and the fourth electrode E21B, with the third electrode E21A located on a different layer than the fourth electrode E21B.

[0107] Multiple third electrodes E21A and multiple fourth electrodes E21B are arranged alternately along the second direction Y. The multiple third electrodes E21A are electrically connected to each other and are subjected to the same voltage. The multiple fourth electrodes E21B are also electrically connected to each other and are subjected to the same voltage. However, the voltage applied to the fourth electrodes E21B is controlled to be different from the voltage applied to the third electrodes E21A. Furthermore, the extending directions of the first electrodes E11A and the second electrodes E11B, which will be detailed later, are orthogonal to the extending directions of the third electrodes E21A and the fourth electrodes E21B.

[0108] The second alignment film AL21 covers the third band electrode E21A and the fourth band electrode E21B. The alignment processing direction AD21 of the second alignment film AL21 is the second direction Y. That is, in the example shown here, the initial alignment direction of the liquid crystal molecules LM21 along the second alignment film AL21 is the second direction Y. In addition, the alignment processing direction AD11 of the first alignment film AL11 is orthogonal to the alignment processing direction AD21 of the second alignment film AL21. The alignment processing direction AD21 intersects the third band electrode E21A and the fourth band electrode E21B.

[0109] Several embodiments will be described below. In each embodiment, the orientation processing direction, the extension direction of the first strip electrode and the second strip electrode, and the extension direction of the third strip electrode and the fourth strip electrode of the first liquid crystal cell 10, the second liquid crystal cell 20, the third liquid crystal cell 30 and the fourth liquid crystal cell 40 will be described.

[0110] <Example 1>

[0111] Figure 4 is a diagram showing an example of the extension direction of each electrode constituting the liquid crystal device 1.

[0112] In the first liquid crystal cell 10, the alignment processing direction AD11 is a direction with a value of 0° relative to the first direction X. The extending directions of the first strip electrode E11A and the second strip electrode E11B are directions with a value of 90° relative to the first direction X.

[0113] The first electrode E11A and the second electrode E11B are both electrodes with a straight shape and straight-extending edges. In this embodiment, the extending direction of the first electrode E11A and the second electrode E11B is the angle formed by a first direction X, which serves as a common reference direction, and the edge of the electrode.

[0114] The orientation processing direction AD21 is 90° relative to the first direction X. The extension directions of the third electrode E21A and the fourth electrode E21B are 0° relative to the first direction X.

[0115] The third electrode E21A and the fourth electrode E21B are both electrodes with a straight shape and straight-extending edges. In this embodiment, the extending direction of the third electrode E21A and the fourth electrode E21B is the angle formed by the second direction Y, which serves as a common reference direction, and the edge of the electrode.

[0116] The extension directions of the first electrode E11A and the second electrode E11B are orthogonal to the extension directions of the third electrode E21A and the fourth electrode E21B.

[0117] In the second liquid crystal cell 20, the alignment processing direction AD12 is a direction with a value of 0° relative to the first direction X. The extending directions of the first strip electrode E12A and the second strip electrode E12B are directions with a value of 90° relative to the first direction X.

[0118] The orientation processing direction AD22 is 90°. The extension directions of the third electrode E22A and the fourth electrode E22B are 0° relative to the first direction X.

[0119] The extension directions of the first electrode E12A and the second electrode E12B are orthogonal to the extension directions of the third electrode E22A and the fourth electrode E22B.

[0120] Figures 5A and 5B are top views of the second liquid crystal cell 20. The first electrode E12A and the second electrode E12B are electrodes with a wave-like shape. The wave-like electrode is a meandering, curved electrode. It can also be described as an electrode with continuous electrode edges that change curvature. If the wave-like electrode is closer to a sine wave shape, then the extending direction of the wave-like electrode is the extending direction of the straight line connecting the starting points of each cycle. Alternatively, it can be said that the direction of the wave's propagation is the extending direction of the wave-like electrode. In Figure 5A, the dashed arrows indicate the extending direction of the wave-like electrode. However, the wave shape does not have to be a sine wave, etc., as long as it is repeatedly formed by changing the curvature.

[0121] As shown in Figure 5A, a wave-shaped strip electrode extends from a rectangular electrode. For example, the first strip electrode E12A extends from the rectangular electrode E12Ab, which extends in a direction parallel to the first direction X, along the second direction Y. The second strip electrode E12B extends from the rectangular electrode E12Bb, which extends in a direction parallel to the first direction X, along a direction opposite to the second direction Y.

[0122] As shown in Figure 5B, for example, the third electrode E22A extends from the rectangular electrode E22Ab, which extends in a direction parallel to the second direction Y, along the first direction X. The fourth electrode E22B extends from the rectangular electrode E22Bb, which extends in a direction parallel to the second direction Y, along a direction opposite to the first direction X.

[0123] In this embodiment, the second direction Y and its opposite direction are referred to as directions parallel to the second direction Y. The same applies to the first direction X and other specifically described directions below.

[0124] Referring back to Figure 4, in the third liquid crystal cell 30, the alignment processing direction AD13 is -90°. The extension directions of the first strip electrode E13A and the second strip electrode E13B, which have straight shapes, are 0°.

[0125] The orientation direction AD23 is 0°. The extension directions of the third strip electrode E23A and the fourth strip electrode E23B, which have a straight shape, are 90°.

[0126] The extension directions of the first electrode E13A and the second electrode E13B are orthogonal to the extension directions of the third electrode E23A and the fourth electrode E23B.

[0127] In the fourth liquid crystal cell 40, the alignment processing direction AD14 is -90°. The extension directions of the first strip electrode E14A and the second strip electrode E14B, which have a waveform shape, are 0°.

[0128] The orientation direction AD24 is 0°. The third electrode E24A and the fourth electrode E24B, which have a wave shape, extend in a 90° direction.

[0129] The extension directions of the first electrode E14A and the second electrode E14B are orthogonal to the extension directions of the third electrode E24A and the fourth electrode E24B.

[0130] Flexible wiring substrates F1 and F2, which are connected to the first transparent substrate S11 and S12 respectively, extend generally in the second direction Y. Flexible wiring substrates F3 and F4, which are connected to the first transparent substrate S13 and S14 respectively, extend generally in a direction parallel to the first direction X. Flexible wiring substrates F1 to F4 may also extend in different directions.

[0131] Here, the interrelationships between the liquid crystal cells will be explained.

[0132] Focusing on the first liquid crystal unit 10 and the second liquid crystal unit 20, the electrode shapes of the first electrode E11A and the second electrode E11B are different from the electrode shapes of the first electrode E12A and the second electrode E12B, which are respectively straight and wave-shaped.

[0133] When the first liquid crystal cell 10 and the second liquid crystal cell 20 are bonded, for example, the first strip electrode E11A and the first strip electrode E12A extend in the same 90° direction, but their straight and wave shapes differ from the electrode shapes, resulting in inconsistent electrode edges. Since there are no electrodes that completely overlap, moiré patterns can be suppressed. Furthermore, regarding the other electrodes, specifically the second strip electrode E11B and the second strip electrode E12B, the third strip electrode E21A and the third strip electrode E22A, and the fourth strip electrode E21B and the fourth strip electrode E22B, their extension directions are also the same, but their electrode shapes are different, resulting in inconsistent electrode edges when viewed from above.

[0134] Here, the relationship between the first liquid crystal unit 10 and the second liquid crystal unit 20 has been explained, but the same applies to the relationship between the third liquid crystal unit 30 and the fourth liquid crystal unit 40.

[0135] Next, focusing on the first liquid crystal cell 10 and the third liquid crystal cell 30. The extension directions of the linear first strip electrode E11A and the second strip electrode E11B are orthogonal to the extension directions of the linear first strip electrode E13A and the second strip electrode E13B.

[0136] Furthermore, the extension directions of the straight-shaped third electrode E21A and fourth electrode E21B are orthogonal to the extension directions of the straight-shaped third electrode E23A and fourth electrode E23B.

[0137] When the first liquid crystal cell 10 is rotated 90° clockwise in the XY plane, the extension directions of the first electrode E11A and the second electrode E11B are consistent with the extension directions of the first electrode E13A and the second electrode E13B. Similarly, the extension directions of the third electrode E21A and the fourth electrode E21B are consistent with the extension directions of the third electrode E23A and the fourth electrode E23B.

[0138] In other words, in the XY plane, the first electrode E11A and the second electrode E11B, as well as the first electrode E13A and the second electrode E13B, are rotationally symmetrical by 90°. Similarly, it can be said that the third electrode E21A and the fourth electrode E21B, as well as the third electrode E23A and the fourth electrode E23B, are rotationally symmetrical by 90°. That is, the first liquid crystal cell 10 and the third liquid crystal cell 30 are rotationally symmetrical by 90°, and by rotating the first liquid crystal cell 10 90° clockwise in the XY plane, it can be used as the third liquid crystal cell 30. Therefore, compared with preparing the first liquid crystal cell 10 and the third liquid crystal cell 30 separately, costs can be reduced.

[0139] Furthermore, when the first liquid crystal unit 10, the second liquid crystal unit 20, and the third liquid crystal unit 30 are bonded together, there are no electrodes that completely overlap when viewed from the first transparent substrates of each liquid crystal unit or when viewed from the second transparent substrates, thus suppressing moiré patterns.

[0140] Here, the relationship between the first liquid crystal unit 10 and the third liquid crystal unit 30 has been explained, but the same applies to the relationship between the second liquid crystal unit 20 and the fourth liquid crystal unit 40. That is, the second liquid crystal unit 20 and the fourth liquid crystal unit 40 are rotationally symmetrical at 90°. By rotating the second liquid crystal unit 20 90° clockwise in the XY plane, it can be used as the fourth liquid crystal unit 40. Therefore, compared to preparing the second liquid crystal unit 20 and the fourth liquid crystal unit 40 separately, costs can be reduced. Therefore, by preparing two liquid crystal units with different electrode extension directions, a liquid crystal device 1 formed by overlapping the aforementioned first liquid crystal unit 10 to the fourth liquid crystal unit 40 can be constructed.

[0141] Focusing on the first liquid crystal unit 10 and the fourth liquid crystal unit 40, the electrode shapes of the third electrode E21A and the fourth electrode E21B on the second transparent substrate S21 of the first liquid crystal unit 10 are different from the electrode shapes of the first electrode E14A and the second electrode E14B on the first transparent substrate S14 of the fourth liquid crystal unit 40, which are respectively straight-line and wave-shaped, but both extend along the first direction X. Furthermore, the electrode shapes of the first electrode E11A and the second electrode E11B on the first transparent substrate S11 of the first liquid crystal unit 10 are different from the electrode shapes of the third electrode E24A and the fourth electrode E24B on the second transparent substrate S24 of the fourth liquid crystal unit 40, which are respectively straight-line and wave-shaped, but both extend along the second direction Y.

[0142] When the first liquid crystal cell 10 and the fourth liquid crystal cell 40 are stacked, for example, the third band electrode E21A and the first band electrode E14A extend in the same direction (first direction X), but their straight and wave shapes differ from the electrode shapes, resulting in inconsistent electrode edges. Since there are no electrodes that completely overlap, moiré patterns can be suppressed. Furthermore, although each electrode acts on the same polarization component (e.g., the P-polarization component), by making the electrode shapes different, the diffusion conditions can be subtly varied, thereby also suppressing moiré patterns. Moreover, regarding the other electrodes, specifically the fourth band electrode E21B and the second band electrode E14B, the first band electrode E11A and the third band electrode E24A, and the second band electrode E11B and the fourth band electrode E24B, their extension directions are also the same, but their electrode shapes are different, resulting in inconsistent electrode edges when viewed from above.

[0143] Similarly, focusing on the second liquid crystal cell 20 and the third liquid crystal cell 30, the electrode shapes of the third electrode E22A and the fourth electrode E22B on the second transparent substrate S22 of the second liquid crystal cell 20 are different from the electrode shapes of the first electrode E13A and the second electrode E13B on the first transparent substrate S13 of the third liquid crystal cell 30, which are respectively straight-line and wave-shaped, but both extend along the first direction X. Furthermore, the electrode shapes of the first electrode E12A and the second electrode E12B on the first transparent substrate S12 of the second liquid crystal cell 20 are different from the electrode shapes of the third electrode E23A and the fourth electrode E23B on the second transparent substrate S23 of the third liquid crystal cell 30, which are respectively straight-line and wave-shaped, but both extend along the second direction Y.

[0144] When the second liquid crystal cell 20 and the third liquid crystal cell 30 are stacked, for example, the extension directions of the third band electrode E22A and the first band electrode E13A are the same (first direction X), but their straight line shape and wave shape are different from the electrode shape, so the edges of the electrodes are inconsistent. Since there are no electrodes that completely overlap each other, moiré patterns can be suppressed. In addition, each electrode acts on the same polarization component (e.g., the P polarization component), but by making the electrode shapes different, the diffusion condition can be subtly changed, thereby suppressing moiré patterns. Furthermore, regarding the other electrodes, specifically the fourth band electrode E22B and the second band electrode E13B, the first band electrode E12A and the third band electrode E23A, and the second band electrode E12B and the fourth band electrode E23B, their extension directions are also the same, but their electrode shapes are different, so the edges of the electrodes are inconsistent when viewed from above.

[0145] In addition, when the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30 and the fourth liquid crystal unit 40 are bonded together, there are no electrodes that completely overlap when viewed from the first transparent substrate of each liquid crystal unit or when viewed from the second transparent substrate. Therefore, moiré patterns can be suppressed.

[0146] Here, the optical function in the first liquid crystal cell 10 will be explained with reference to FIGS. 6 and 7. Furthermore, in FIGS. 6 and 7, only the configuration necessary for the explanation of the liquid crystal molecules LM1, etc., near the first transparent substrate S11 is shown.

[0147] Figure 6 is a schematic diagram of the first liquid crystal cell 10 in the off state (OFF) when no electric field is formed in the liquid crystal layer LC1.

[0148] In the off state of the liquid crystal layer LC1, the liquid crystal molecules LM1 undergo initial alignment. In this off state, the liquid crystal layer LC1 has a substantially uniform refractive index distribution. Therefore, the polarization component POL1, which is incident light toward the first liquid crystal cell 10, passes through the liquid crystal layer LC1 with almost no refraction (or diffusion). Furthermore, as shown in FIG3, in the first liquid crystal cell 10, between the upper and lower transparent substrates S11 and S21, the initial alignment directions of the liquid crystal molecules in the liquid crystal layer LC1 intersect at 90°. Therefore, the liquid crystal molecules in the liquid crystal layer LC1 are aligned along the first direction X on the first transparent substrate S11 side, but as they move toward the second transparent substrate S21 side, their orientation gradually changes from the first direction X to the second direction Y, and they are aligned along the second direction Y on the second transparent substrate S21 side. The orientation of the polarization component changes according to the change in the orientation of the liquid crystal layer LC1. More specifically, the polarization component having a polarization axis in the first direction X changes its polarization axis to the second direction Y as it passes through the liquid crystal layer LC1. On the other hand, the polarization component having a polarization axis in the second direction Y changes its polarization axis from the second direction Y to the first direction X as it passes through the liquid crystal layer LC1. Therefore, when viewed from these mutually orthogonal polarization components, their polarization axes are reversed during the passage through the first liquid crystal cell 10. The effect of changing the orientation of this polarization axis is sometimes referred to as optical rotation.

[0149] Figure 7 is a schematic diagram of the first liquid crystal cell 10 in the ON state where an electric field is formed in the liquid crystal layer LC1.

[0150] In the ON state, a potential difference is generated between the first electrode E11A and the second electrode E11B, thereby forming an electric field in the liquid crystal layer LC1. For example, when the liquid crystal layer LC1 has a positive dielectric anisotropy, the liquid crystal molecules LM1 are aligned along their long axis along the electric field. However, the range reached by the electric field between the first electrode E11A and the second electrode E11B is mainly about 1 / 2 the thickness of the liquid crystal layer LC1. Therefore, as shown in FIG7, in the region of the liquid crystal layer LC1 close to the first transparent substrate S11, regions are formed in which the liquid crystal molecules LM1 are oriented approximately perpendicularly to the substrate, regions in which the liquid crystal molecules LM1 are oriented in an inclined direction relative to the substrate, and regions in which the liquid crystal molecules LM1 are oriented approximately horizontally relative to the substrate.

[0151] Liquid crystal molecules LM1 have a refractive index anisotropy Δn. Therefore, the liquid crystal layer LC1 in the conductive state has a refractive index distribution or retardation distribution corresponding to the orientation state of the liquid crystal molecules. Here, retardation is represented by Δn·d when the thickness of the liquid crystal layer LC1 is set to d. Furthermore, in this embodiment, a positive liquid crystal is used as the liquid crystal layer LC1, but by considering the orientation direction, a negative liquid crystal can also be used.

[0152] In this conductive state, the polarization component POL1 diffuses through the liquid crystal layer LC1 due to the influence of the refractive index distribution of LC1. More specifically, the polarization component with the polarization axis in the first direction X diffuses due to the influence of the refractive index distribution of LC1 and rotates in the second direction Y. On the other hand, the polarization component with the polarization axis in the second direction Y is not affected by the refractive index distribution, does not diffuse, and rotates only in the first direction X and passes through the liquid crystal layer LC1. Furthermore, in FIG6, the case where an electric field is formed by the potential difference between the first band electrode E11A and the second band electrode E11B is explained. However, when the incident light is diffused using the first liquid crystal cell 10, it is preferable to also form an electric field by the potential difference between the third band electrode E21A and the fourth band electrode E21B. As a result, not only the orientation state of the liquid crystal molecules near the first transparent substrate S11 is controlled, but also the orientation state of the liquid crystal molecules near the second transparent substrate S21 is controlled, thereby forming a predetermined refractive index distribution in the liquid crystal layer LC1. More specifically, the liquid crystal layer LC1 on the second transparent substrate S21 side also has a refractive index distribution, thereby causing the polarization component that undergoes optical rotation in the second direction Y to diffuse during the passage of the liquid crystal layer LC1. That is, the polarization component that diffuses on the first transparent substrate S11 side further diffuses on the second transparent substrate S21 side and is emitted from the first liquid crystal cell 10. On the other hand, the polarization component that undergoes optical rotation in the first direction X during the passage of the liquid crystal layer LC1 is not affected by the refractive index distribution and is emitted from the first liquid crystal cell LC1.

[0153] Furthermore, the polarization component also diffuses and rotates within the second liquid crystal cell LC20. Specifically, the polarization component emitted from the light source, having a polarization axis in the first direction X, changes its polarization axis from the first direction X to the second direction Y as it passes through the first liquid crystal cell 10, and then changes its polarization axis from the second direction Y to the first direction X as it passes through the second liquid crystal cell 20. Additionally, when the liquid crystal molecules parallel to the polarization component have a refractive index distribution during this process, the polarization component diffuses according to that refractive index distribution.

[0154] Similarly, the polarization component emitted from the light source, with a polarization axis in the second direction Y, changes its polarization axis from the second direction Y to the first direction X as it passes through the first liquid crystal cell 10, and then changes its polarization axis from the first direction X to the second direction Y as it passes through the second liquid crystal cell 20. Furthermore, when the liquid crystal molecules parallel to this polarization component have a refractive index distribution during this process, the polarization component diffuses according to that refractive index distribution. The same phenomenon occurs in the third liquid crystal cell 30 and the fourth liquid crystal cell 40, but since they are obtained by rotating the first and second liquid crystal cells by 90 degrees, the polarization components that cause the diffusion effect are interchanged.

[0155] That is, in the configuration formed by stacking the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30 and the fourth liquid crystal unit 40, for example, the first liquid crystal unit 10 and the fourth liquid crystal unit 40 are configured to mainly scatter (diffuse) the polarization component POL1, which is p-polarized light, and the second liquid crystal unit 20 and the third liquid crystal unit 30 are configured to mainly scatter (diffuse) the polarization component POL2, which is s-polarized light.

[0156] As described above, the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30, and the fourth liquid crystal unit 40 are each configured not to contain electrodes extending in the same direction. Therefore, the liquid crystal layers of each liquid crystal unit form different refractive index distributions in the conductive state. Consequently, interference of light transmitted through each liquid crystal unit is reduced, and moiré patterns can be suppressed.

[0157] <Example 2>

[0158] Figure 8 is a top view showing another example of the electrodes constituting the liquid crystal device 1. In the configuration example shown in Figure 8, the difference compared to the configuration example shown in Figure 4 is that the electrodes are arranged in a zigzag shape.

[0159] In Figure 8, the first liquid crystal cell 10 and the third liquid crystal cell 30 are the same as those shown in Figure 4. The second liquid crystal cell 20 and the fourth liquid crystal cell 40 shown in Figure 8 have electrodes with a tortuous shape instead of a waveform shape.

[0160] Figures 9A and 9B are top views of the second liquid crystal cell 20. The first electrode E12A and the second electrode E12B are electrodes with zigzag shapes. For example, the second electrode E12B has a first electrode piece E12B1 and a second electrode piece E12B2, which are continuous and form a zigzag shape. For example, as shown in Figure 9A, the first electrode piece E12B1 extends from a rectangular electrode E12Bb extending in a direction parallel to the first direction X, as indicated by the dotted-dash arrow, toward a direction forming an acute angle θ counterclockwise with the first direction X. As indicated by the dotted-dash arrow, the second electrode piece E12B2 extends from the first electrode piece E12B1 toward a direction forming an acute angle θ clockwise with the first direction X. In Figure 9, the second electrode E12B is formed by a pair of first electrode pieces E12B1 and second electrode pieces E12B2, thus forming a "く" shape. Alternatively, a second electrode E12B may be configured to have multiple first electrode pieces E12B1 and second electrode pieces E12B2 alternately in the second direction Y. The aforementioned tortuous shape refers to a shape in which the first electrode plate E12B1 and the second electrode plate E12B2 are formed as a pair or repeatedly formed multiple times. The acute angle θ is 85° or more and 89° or less. The extending directions of the first electrode plate E12B1 and the second electrode plate E12B2 can also be opposite.

[0161] By repeatedly forming multiple sets of the combination of the first electrode plate E12B1 and the second electrode plate E12B2 along the first direction X, the second electrode E12B as a whole extends in a direction parallel to the second direction Y, as shown by the dashed arrow.

[0162] The first electrode E12A and the second electrode E12B extend along the second direction Y as shown by the dashed arrow. The structure of each first electrode E12A is the same as that of the second electrode E12B.

[0163] The third electrode E22A and the fourth electrode E22B of the second transparent substrate S22 extend in a direction parallel to the first direction X. For example, the third electrode E22A has a first electrode sheet E22A1 and a second electrode sheet E22A2, which are continuous and form a tortuous shape. The first electrode sheet and the second electrode sheet of the third electrode E22A are continuous and form a tortuous shape.

[0164] As shown in Figure 9B, for example, the first electrode plate E22A1, as indicated by the dashed arrow, extends from the rectangular electrode E22Ab, which extends in a direction parallel to the second direction Y, towards a direction forming an acute angle θ clockwise with the second direction Y. As indicated by the dashed arrow, the second electrode plate E22A2 extends from the first electrode plate E22A1 towards a direction forming an acute angle θ counterclockwise with the second direction Y. Repeatedly forming the first electrode plate E22A1 and the second electrode plate E22A2 constitutes the third strip electrode E22A. The extending directions of the first electrode plate E22A1 and the second electrode plate E22A2 can also be opposite.

[0165] By repeatedly forming multiple combinations of first electrode plates E22A1 and second electrode plates E22A2 along the first direction X, the third electrode E22A as a whole extends in a direction parallel to the first direction Y, as shown by the dashed arrow.

[0166] The fourth electrode E22B, like the third electrode E22A, extends as a whole from the rectangular electrode E22Bb in a direction parallel to the first direction X. The configuration of each fourth electrode E22B is the same as that of the third electrode E22A.

[0167] The extension directions of the first electrode E14A and the second electrode E14B of the fourth liquid crystal cell 40 are the same as the extension directions of the third electrode E22A and the fourth electrode E22B of the second liquid crystal cell 20. The extension directions of the third electrode E24A and the fourth electrode E24B are the same as the extension directions of the first electrode E12A and the second electrode E12B.

[0168] In this embodiment, the electrode extension direction and alignment processing direction of the alignment film of the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30, and the fourth liquid crystal unit 40 are the same as those described in Embodiment 1. Therefore, the above description is omitted here.

[0169] In this embodiment, for example, in the first liquid crystal cell 10 and the second liquid crystal cell 20, the electrode shapes of the straight-shaped first strip electrode E11A and the second strip electrode E11B also overlap with the zigzag-shaped first strip electrode E12A and the second strip electrode E12B. Because the electrode shapes are different, the edges of these electrodes are inconsistent. Since there are no electrodes that completely overlap each other, moiré patterns can be suppressed.

[0170] The relationship between the first liquid crystal unit 10 and the second liquid crystal unit 20 has been explained, but the same applies to the relationship between the third liquid crystal unit 30 and the fourth liquid crystal unit 40.

[0171] Focusing on the first liquid crystal cell 10 and the fourth liquid crystal cell 40, the electrode shapes of the third electrode E21A and the fourth electrode E21B on the second transparent substrate S21 of the first liquid crystal cell 10 and the electrode shapes of the first electrode E14A and the second electrode E14B on the first transparent substrate S14 of the fourth liquid crystal cell 40 are different from straight lines and zigzag shapes (U-shaped), respectively, but both extend along the first direction X. Furthermore, the electrode shapes of the first electrode E11A and the second electrode E11B on the first transparent substrate S11 of the first liquid crystal cell 10 and the electrode shapes of the third electrode E24A and the fourth electrode E24B on the second transparent substrate S24 of the fourth liquid crystal cell 40 are different from straight lines and zigzag shapes (U-shaped), respectively, but both extend along the second direction Y.

[0172] When the first liquid crystal cell 10 and the fourth liquid crystal cell 40 are stacked, for example, the extension directions of the third band electrode E21A and the first band electrode E14A are the same (first direction X), but their straight and zigzag shapes are different from the electrode shapes, resulting in inconsistent electrode edges. Since there are no electrodes that completely overlap each other, moiré patterns can be suppressed. In addition, each electrode acts on the same polarization component (e.g., the P-polarization component), but by making the electrode shapes different, the diffusion conditions can be subtly changed, thereby suppressing moiré patterns as well. Furthermore, regarding the other electrodes, specifically the fourth band electrode E21B and the second band electrode E14B, the first band electrode E11A and the third band electrode E24A, and the second band electrode E11B and the fourth band electrode E24B, their extension directions are also the same, but their electrode shapes are different, resulting in inconsistent electrode edges when viewed from above.

[0173] Similarly, focusing on the second liquid crystal cell 20 and the third liquid crystal cell 30, the electrode shapes of the third electrode E22A and the fourth electrode E22B on the second transparent substrate S22 of the second liquid crystal cell 20 and the electrode shapes of the first electrode E13A and the second electrode E13B on the first transparent substrate S13 of the third liquid crystal cell 30 are different from zigzag (U-shaped) and straight shapes, respectively, but both extend along the first direction X. Furthermore, the electrode shapes of the first electrode E12A and the second electrode E12B on the first transparent substrate S12 of the second liquid crystal cell 20 and the electrode shapes of the third electrode E23A and the fourth electrode E23B on the second transparent substrate S23 of the third liquid crystal cell 30 are different from zigzag (U-shaped) and straight shapes, respectively, but both extend along the second direction Y.

[0174] When the second liquid crystal cell 20 and the third liquid crystal cell 30 are stacked, for example, the extension directions of the third band electrode E22A and the first band electrode E13A are the same (first direction X), but their zigzag and straight shapes are different from the electrode shapes, so the edges of the electrodes are inconsistent. Since there are no electrodes that completely overlap each other, moiré patterns can be suppressed. In addition, each electrode acts on the same polarization component (e.g., the P-polarization component), but by making the electrode shapes different, the diffusion conditions can be subtly changed, thereby suppressing moiré patterns. Furthermore, regarding the other electrodes, specifically the fourth band electrode E22B and the second band electrode E13B, the first band electrode E12A and the third band electrode E23A, and the second band electrode E12B and the fourth band electrode E23B, their extension directions are also the same, but their electrode shapes are different, so the edges of the electrodes are inconsistent when viewed from above.

[0175] In addition, when the first liquid crystal unit 10, the second liquid crystal unit 20, the third liquid crystal unit 30 and the fourth liquid crystal unit 40 are bonded together, there are no electrodes that completely overlap when viewed from the first transparent substrate of each liquid crystal unit or when viewed from the second transparent substrate. Therefore, moiré patterns can be suppressed.

[0176] In this embodiment, the liquid crystal cell obtained by rotating the first liquid crystal cell 10 by 90° can also be used as the third liquid crystal cell 30. The liquid crystal cell obtained by rotating the second liquid crystal cell 20 by 90° can also be used as the fourth liquid crystal cell 40. Therefore, compared with preparing the first liquid crystal cell 10 and the third liquid crystal cell 30 separately, the cost can be reduced.

[0177] In this embodiment, it achieves the same effect as described above.

[0178] <Example 3>

[0179] FIG10 is a top view showing another example of the electrodes in the liquid crystal device 1 constituting this embodiment. In the configuration example shown in FIG10, compared with the configuration example shown in FIG4, the difference lies in the overlap of the zigzag-shaped and wave-shaped electrodes.

[0180] The first liquid crystal cell 10 shown in Figure 10 is the same as the second liquid crystal cell 20 in Figure 8. The third liquid crystal cell 30 shown in Figure 10 is a liquid crystal cell obtained by rotating the first liquid crystal cell 10 in Figure 10 clockwise by 90°. The second liquid crystal cell 20 and the fourth liquid crystal cell 40 shown in Figure 10 are the same as the second liquid crystal cell 20 and the fourth liquid crystal cell 40 in Figure 4, respectively.

[0181] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell relative to each other, or when viewed from the second transparent substrates relative to each other, there are no electrodes that completely overlap, thus moiré patterns can be suppressed. By rotating the liquid crystal cells and using them for other liquid crystal cells, costs can be reduced compared to preparing them separately.

[0182] In this embodiment, it achieves the same effect as described above.

[0183] <Example 4-1>

[0184] FIG11 is a top view showing another example of the electrodes constituting the liquid crystal device 1 of this embodiment. In the configuration example shown in FIG11, the difference from the configuration example shown in FIG8 is that all electrodes have a tortuous shape.

[0185] In the liquid crystal device 1 shown in FIG11, the first liquid crystal cell 10 is the same as the second liquid crystal cell 20 shown in FIG8. In the first liquid crystal cell 10 of FIG11, the alignment processing direction AD11 is a direction with a value of 0° relative to the first direction X. The first strip electrode E11A and the second strip electrode E11B, which are in a tortuous shape, extend in a direction parallel to the second direction Y.

[0186] The orientation processing direction AD21 is a direction that is 90° relative to the first direction X. The first electrodes E11A and E11B, which have zigzag shapes, extend in a direction parallel to the second direction Y. The third electrode E21A and the fourth electrode E21B, which have zigzag shapes, extend in a direction parallel to the first direction X.

[0187] The extension directions of the first electrode E11A and the second electrode E11B are orthogonal to the extension directions of the third electrode E21A and the fourth electrode E21B.

[0188] In the second liquid crystal cell 20, the alignment processing direction AD12 is 0°. The first strip electrode E12A and the second strip electrode E12B, which have zigzag shapes, extend along the second direction Y.

[0189] The orientation processing direction AD22 is 90°. The third strip electrode E22A and the fourth strip electrode E22B, which have zigzag shapes, extend along the first direction X.

[0190] The extension directions of the first electrode E12A and the second electrode E12B are orthogonal to the extension directions of the third electrode E22A and the fourth electrode E22B.

[0191] In the third liquid crystal cell 30, the alignment processing direction AD13 is a -90° direction. The first strip electrode E13A and the second strip electrode E13B, which have a tortuous shape, extend in a direction parallel to the first direction X.

[0192] The orientation processing direction AD23 is 0°. The third strip electrode E23A and the fourth strip electrode E23B, which have zigzag shapes, extend along the second direction Y.

[0193] The extension directions of the first electrode E13A and the second electrode E13B are orthogonal to the extension directions of the third electrode E23A and the fourth electrode E23B.

[0194] In the fourth liquid crystal cell 40, the alignment processing direction AD14 is -90°. The first strip electrode E14A and the second strip electrode E14B, which have a tortuous shape, extend in a direction parallel to the first direction X.

[0195] The orientation processing direction AD24 is 0°. The third strip electrode E24A and the fourth strip electrode E24B, which have a zigzag shape, extend in a direction parallel to the second direction Y.

[0196] The extension directions of the first electrode E14A and the second electrode E14B are orthogonal to the extension directions of the third electrode E24A and the fourth electrode E24B.

[0197] The flexible wiring substrate F1, which is connected to the first transparent substrate S11, extends out generally along the second direction Y. The flexible wiring substrate F2, which is connected to the first transparent substrate S12, extends out generally along the second direction Y.

[0198] The flexible wiring substrate F3, which is connected to the first transparent substrate S13, extends out in a direction generally parallel to the first direction X. The flexible wiring substrate F4, which is connected to the first transparent substrate S14, extends out in a direction generally parallel to the first direction X.

[0199] In this embodiment, the first transparent substrate S11 of the first liquid crystal unit 10 and the first transparent substrate S12 of the second liquid crystal unit 20 are in a relationship where the electrodes formed on the substrates are linearly symmetrical (reversed) with respect to the second direction Y. That is, the protruding orientations of the electrodes in the first direction X are opposite between these substrates. More specifically, the electrodes of the first transparent substrate S11 of the first liquid crystal unit 10 protrude in the positive direction of the first direction X, and the electrodes of the first transparent substrate S12 of the second liquid crystal unit 20 protrude in the negative direction of the first direction X. The second transparent substrate S21 of the first liquid crystal unit 10 and the second transparent substrate S22 of the second liquid crystal unit 20 are in a relationship where the electrodes formed on the substrates are linearly symmetrical (reversed) with respect to the first direction X. More specifically, the electrodes of the second transparent substrate S21 of the first liquid crystal unit 10 protrude in the negative direction of the second direction Y, and the electrodes of the second transparent substrate S22 of the second liquid crystal unit 20 protrude in the positive direction of the second direction Y.

[0200] The first transparent substrate S13 of the third liquid crystal unit 30 and the first transparent substrate S14 of the fourth liquid crystal unit 40 are in a relationship where the electrodes formed on the substrates are linearly symmetrical (reversed) with respect to the first direction X. The second transparent substrate S23 of the third liquid crystal unit 30 and the second transparent substrate S24 of the fourth liquid crystal unit 40 are in a relationship where the electrodes formed on the substrates are linearly symmetrical (reversed) with respect to the second direction Y.

[0201] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell relative to each other, or when viewed from the second transparent substrates relative to each other, there are no electrodes that completely overlap, thus suppressing moiré patterns. By changing the configuration of the transparent substrates to use other transparent substrates, costs can be reduced compared to preparing them individually.

[0202] In this embodiment, it achieves the same effect as described above.

[0203] <Example 4-2>

[0204] Figure 12 is a top view showing another example of each electrode in the liquid crystal device 1 constituting this embodiment. The configuration example shown in Figure 12 differs from the configuration example shown in Figure 11 in that the liquid crystal cell obtained by rotating the liquid crystal cell is used for other liquid crystal cells.

[0205] In this embodiment, the second liquid crystal cell 20 is a liquid crystal cell obtained by rotating the first liquid crystal cell 10 by 180°. The fourth liquid crystal cell 40 is a liquid crystal cell obtained by rotating the third liquid crystal cell 30 by 180°. By rotating the liquid crystal cells and using them for other liquid crystal cells, costs can be reduced compared to preparing them separately.

[0206] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell or from the second transparent substrates, there are no electrodes that completely overlap with each other, thus moiré patterns can be suppressed.

[0207] In this embodiment, it achieves the same effect as described above.

[0208] <Example 4-3>

[0209] Figure 13 is a top view showing another example of each electrode in the liquid crystal device 1 constituting this embodiment. The configuration shown in Figure 13 differs from the configuration shown in Figure 11 in that the transparent substrate is rotated.

[0210] The first liquid crystal unit 10 shown in Figure 13 is the same as the first liquid crystal unit 10 shown in Figure 11.

[0211] The first transparent substrate S12 of the second liquid crystal cell 20 is a transparent substrate obtained by rotating the first transparent substrate S11 of the first liquid crystal cell 10 by 180°. The second transparent substrate S22 of the second liquid crystal cell 20 is a transparent substrate obtained by rotating the second transparent substrate S21 of the first liquid crystal cell 10 by 180°.

[0212] The third liquid crystal unit 30 is a liquid crystal unit obtained by rotating the first liquid crystal unit 10 clockwise by 90°.

[0213] The fourth liquid crystal unit 40 is a liquid crystal unit obtained by rotating the second liquid crystal unit 20 clockwise by 90°.

[0214] In this embodiment, by changing the transparent substrate and using it as other transparent substrates, costs can be reduced compared to preparing them separately.

[0215] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell or from the second transparent substrates, there are no electrodes that completely overlap with each other, thus moiré patterns can be suppressed.

[0216] In this embodiment, it achieves the same effect as described above.

[0217] <Example 4-4>

[0218] Figure 14 is a top view showing another example of each electrode in the liquid crystal device 1 constituting this embodiment. In the configuration example shown in Figure 14, compared with the configuration example shown in Figure 11, the difference lies in the fact that the substrate obtained by rotating the transparent substrate is used for other substrates.

[0219] In the liquid crystal device 1 shown in FIG14, the first liquid crystal unit 10 is the same as the first liquid crystal unit 10 shown in FIG11.

[0220] The second liquid crystal cell 20 is formed by inverting the front and back of the first liquid crystal cell 10 and then rotating it counterclockwise by 90°. That is, the second transparent substrate S22 of the second liquid crystal cell 20 is the same as the first transparent substrate S11 of the first liquid crystal cell 10. The first transparent substrate S12 of the second liquid crystal cell 20 is the same as the second transparent substrate S21 of the first liquid crystal cell 10.

[0221] The third liquid crystal unit 30 is obtained by rotating the first liquid crystal unit 10 clockwise by 90°. The fourth liquid crystal unit 40 is obtained by rotating the second liquid crystal unit 20 clockwise by 90°.

[0222] By changing the configuration of the liquid crystal cells and using them as other liquid crystal cells, costs can be reduced compared to preparing them separately.

[0223] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell or from the second transparent substrates, there are no electrodes that completely overlap with each other, thus moiré patterns can be suppressed.

[0224] In this embodiment, it achieves the same effect as described above.

[0225] <Example 5>

[0226] Figure 15 is a top view showing another example of each electrode in the liquid crystal device 1 constituting this embodiment. In the configuration example shown in Figure 15, compared with the configuration example shown in Figure 11, the difference lies in the fact that the second transparent substrate is rotated 180° in the third liquid crystal cell 30 and the fourth liquid crystal cell 40, with the first liquid crystal cell 10 as the reference.

[0227] In the liquid crystal device 1 shown in FIG15, the first liquid crystal unit 10 is the same as the first liquid crystal unit 10 shown in FIG11.

[0228] The second liquid crystal unit 20 is a liquid crystal unit obtained by rotating the first liquid crystal unit 10 by 180°.

[0229] The third liquid crystal unit 30 is a liquid crystal unit obtained by rotating the second transparent substrate of the first liquid crystal unit 10 by 180 degrees and then attaching it to the first transparent substrate and rotating it counterclockwise by 90 degrees.

[0230] The fourth liquid crystal unit 40 is a liquid crystal unit obtained by rotating the third liquid crystal unit 30 by 180°.

[0231] By changing the configuration of the transparent substrate and using it as other transparent substrates, costs can be reduced compared to preparing them separately.

[0232] In this embodiment, when viewed from the first transparent substrates of each liquid crystal cell or from the second transparent substrates, there are no electrodes that completely overlap with each other, thus moiré patterns can be suppressed.

[0233] In this embodiment, it achieves the same effect as described above.

[0234] <Example 6-1>

[0235] Figure 16 is a top view showing another example of each electrode in the liquid crystal device 1 constituting this embodiment. In the configuration example shown in Figure 16, compared with the configuration example shown in Figure 11, the difference lies in the fact that a liquid crystal cell has a wave-shaped electrode and a zigzag-shaped electrode.

[0236] In the liquid crystal device 1 shown in FIG16, in the first liquid crystal cell 10, the alignment processing direction AD11 is a direction with a value of 0° relative to the first direction X. The first strip electrode E11A and the second strip electrode E11B with waveform shapes extend in a direction parallel to the second direction Y.

[0237] The orientation processing direction AD21 is a direction that is 90° relative to the first direction X. The first electrodes E21A and 21B, which have a zigzag shape, extend in a direction parallel to the second direction Y. The third electrode E21A and the fourth electrode E21B, which have a wave-like shape, extend in a direction parallel to the first direction X.

[0238] The extension directions of the first electrode E11A and the second electrode E11B are orthogonal to the extension directions of the third electrode E21A and the fourth electrode E21B.

[0239] In the second liquid crystal cell 20, the alignment processing direction AD12 is 0°. The first strip electrode E12A and the second strip electrode E12B, which have zigzag shapes, extend along the second direction Y.

[0240] The orientation processing direction AD22 is 90°. The third strip electrode E22A and the fourth strip electrode E22B, which have a wave shape, extend along the first direction X.

[0241] The extension directions of the first electrode E12A and the second electrode E12B are orthogonal to the extension directions of the third electrode E22A and the fourth electrode E22B.

[0242] In the third liquid crystal cell 30, the alignment processing direction AD13 is a -90° direction. The first strip electrode E13A and the second strip electrode E13B, which have a waveform shape, extend in a direction parallel to the first direction X.

[0243] The orientation processing direction AD23 is 0°. The third strip electrode E23A and the fourth strip electrode E23B, which have zigzag shapes, extend along the second direction Y.

[0244] The extension directions of the first electrode E13A and the second electrode E13B are orthogonal to the extension directions of the third electrode E23A and the fourth electrode E23B.

[0245] In the fourth liquid crystal cell 40, the alignment processing direction AD14 is -90°. The first strip electrode E14A and the second strip electrode E14B, which have a tortuous shape, extend in a direction parallel to the first direction X.

[0246] The orientation processing direction AD24 is 0°. The third strip electrode E24A and the fourth strip electrode E24B, which have a wave-like shape, extend in a direction parallel to the second direction Y.

[0247] The extension directions of the first electrode E14A and the second electrode E14B are orthogonal to the extension directions of the third electrode E24A and the fourth electrode E24B.

[0248] In the liquid crystal device 1 shown in FIG16, the flexible wiring substrate F1 connected to the first transparent substrate S11 and the flexible wiring substrate F2 connected to the first transparent substrate S12 are generally led out along the second direction Y.

[0249] The flexible wiring substrate F3, which is connected to the first transparent substrate S13, and the flexible wiring substrate F4, which is connected to the first transparent substrate S14, are extended out in a direction that is generally parallel to the first direction X.

[0250] In Figure 16, the third liquid crystal unit 30 is obtained by rotating the first liquid crystal unit 10 clockwise by 90°. The fourth liquid crystal unit 40 is obtained by rotating the second liquid crystal unit 20 clockwise by 90°.

[0251] By changing the configuration of the liquid crystal cells and using them as other liquid crystal cells, costs can be reduced compared to preparing them separately.

[0252] In this embodiment, a strip electrode with a zigzag shape and a strip electrode with a wave-like shape are disposed in a liquid crystal cell. Among the overlapping liquid crystal cells, when viewed from the first transparent substrate of each liquid crystal cell or when viewed from the second transparent substrate, there are no electrodes that completely overlap, thus suppressing moiré patterns.

[0253] Furthermore, this embodiment describes an example of providing a strip electrode with a zigzag shape and a strip electrode with a wave-like shape in a single liquid crystal cell, but the present invention is not limited thereto. A liquid crystal cell may also have the aforementioned strip electrode with a straight shape and a strip electrode with a zigzag shape, or a strip electrode with a straight shape and a strip electrode with a wave-like shape. Alternatively, for example, liquid crystal cells having strip electrodes with a straight shape and a strip electrode with a zigzag shape, liquid crystal cells having strip electrodes with a straight shape and a strip electrode with a wave-like shape, and liquid crystal cells having strip electrodes with a zigzag shape and a strip electrode with a wave-like shape may be overlapped. By providing liquid crystal cells with strip electrodes of different shapes in this way, moiré patterns can be further suppressed.

[0254] In this embodiment, it achieves the same effect as described above.

[0255] <Example 6-2>

[0256] FIG17 is a top view showing another example of each electrode-bearing component of the liquid crystal device 1 constituting this embodiment. In the configuration example shown in FIG17, compared with the configuration example shown in FIG16, the difference lies in the fact that the flexible wiring substrates of the second liquid crystal cell and the fourth liquid crystal cell are disposed on the second transparent substrate.

[0257] In the liquid crystal device 1 shown in FIG17, the first liquid crystal unit 10 is the same as the first liquid crystal unit 10 shown in FIG16.

[0258] The orientation processing direction AD11 is 0° relative to the first direction X. First electrodes E21A and 21B, having a wave-like shape, extend in a direction parallel to the second direction Y. The orientation processing direction AD21 is 90° relative to the first direction X. Third electrode E21A and fourth electrode E21B, having a zigzag shape, extend in a direction parallel to the first direction X.

[0259] The extension directions of the first electrode E11A and the second electrode E11B are orthogonal to the extension directions of the third electrode E21A and the fourth electrode E21B.

[0260] In the second liquid crystal cell 20, the alignment processing direction AD12 is 0°. The first strip electrode E12A and the second strip electrode E12B, which have a waveform shape, extend along the second direction Y.

[0261] The orientation processing direction AD22 is 90°. The third strip electrode E22A and the fourth strip electrode E22B, which have zigzag shapes, extend along the first direction X.

[0262] The extension directions of the first electrode E12A and the second electrode E12B are orthogonal to the extension directions of the third electrode E22A and the fourth electrode E22B.

[0263] The first transparent substrate S12 of the second liquid crystal unit 20 is a substrate obtained by rotating the second transparent substrate S21 of the first liquid crystal unit 10 clockwise by 90° and inverting it vertically. The second transparent substrate S22 of the second liquid crystal unit 20 is a substrate obtained by rotating the first transparent substrate S11 of the first liquid crystal unit 10 counterclockwise by 90° and inverting it horizontally.

[0264] The third liquid crystal unit 30 is a liquid crystal unit obtained by rotating the first liquid crystal unit 10 clockwise by 90°.

[0265] The first transparent substrate S14 of the fourth liquid crystal cell 40 is a substrate obtained by rotating the first transparent substrate S12 of the second liquid crystal cell 20 clockwise by 90° and reversing its left and right sides. The second transparent substrate S24 of the fourth liquid crystal cell 40 is a substrate obtained by rotating the second transparent substrate S22 of the second liquid crystal cell 20 clockwise by 90° and reversing its alignment processing direction.

[0266] In the liquid crystal device 1 shown in FIG17, the flexible wiring substrate F1, which is connected to the first transparent substrate S11, extends generally along the second direction Y. The flexible wiring substrate F2, which is connected to the second transparent substrate S22, extends generally along the direction opposite to the first direction X.

[0267] The flexible wiring substrate F3, which is connected to the first transparent substrate S13, extends out in a direction generally opposite to the first direction X. The flexible wiring substrate F4, which is connected to the second transparent substrate S24, extends out in a direction generally opposite to the second direction Y.

[0268] By changing the configuration of the same transparent substrate and using it as other transparent substrates, costs can be reduced compared to preparing them separately.

[0269] Furthermore, in this embodiment, when viewed from the first transparent substrates of each liquid crystal cell or when viewed from the second transparent substrates, there are no electrodes that completely overlap with each other, thus moiré patterns can be suppressed.

[0270] In this embodiment, it achieves the same effect as described above.

[0271] In this disclosure, one of the straight shape, wave shape, and zigzag shape is sometimes referred to as the first shape, and the other as the second shape.

[0272] Several embodiments of the present invention have been described, but these embodiments are merely illustrative and not intended to limit the scope of the invention. These novel embodiments can be implemented in various other ways, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their variations are included within the scope or spirit of the invention, and are included within the scope of the invention as described in the claims and its equivalents.

[0273] Explanation of reference numerals in the attached figures

[0274] 1…Liquid crystal device, 10…First liquid crystal unit, 20…Second liquid crystal unit, 30…Third liquid crystal unit, 40…Fourth liquid crystal unit, AD11…Orientation processing direction, AD12…Orientation processing direction, AD13…Orientation processing direction, AD14…Orientation processing direction, AD21…Orientation processing direction, AD22…Orientation processing direction, AD23…Orientation processing direction, AD24…Orientation processing direction, E11A…First strip electrode, E11B…Second strip electrode, E12A…First strip electrode, E12B…Second strip electrode, E13A…First strip electrode, E13B…Second strip electrode, E14A…First strip electrode, E14B…Second strip electrode, E21A…Third strip electrode, E21B…Fourth strip electrode, E22A…Third strip electrode, E22B…Fourth strip electrode, E23A…Third strip electrode, E23B…Fourth strip electrode, E24A…Third strip electrode, E24B…Fourth strip electrode.

Claims

1. A liquid crystal device comprising: a first liquid crystal unit; a second liquid crystal unit overlapping the first liquid crystal unit; a third liquid crystal unit overlapping the second liquid crystal unit; and a fourth liquid crystal unit overlapping the third liquid crystal unit, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively comprises: a first transparent substrate; a first alignment film; a first electrode and a second electrode, disposed at a distance from each other between the first transparent substrate and the first alignment film, and subjected to different voltages; and a second transparent substrate; A second alignment film; a third and a fourth strip electrode, located between the second transparent substrate and the second alignment film, are spaced apart and are subjected to different voltages; A liquid crystal layer is located between the first alignment film and the second alignment film. The first, second, third, and fourth strip electrodes of the first liquid crystal unit and the first, second, third, and fourth strip electrodes of the third liquid crystal unit have a first shape. The first, second, third, and fourth strip electrodes of the second liquid crystal unit and the first, second, third, and fourth strip electrodes of the fourth liquid crystal unit have a second shape different from the first shape. In each liquid crystal unit from the first liquid crystal unit to the fourth liquid crystal unit, with one side of the first transparent substrate as a reference, a direction orthogonal to the side is designated as a first direction, and a direction parallel to the side is designated as a second direction. The alignment processing direction of the first alignment film is parallel to the first direction, the alignment processing direction of the second alignment film is parallel to the second direction, the extension directions of the first and second strip electrodes intersect the first direction, and the extension directions of the third and fourth strip electrodes intersect the second direction.

2. A liquid crystal device comprising: a first liquid crystal unit; a second liquid crystal unit overlapping the first liquid crystal unit; a third liquid crystal unit overlapping the second liquid crystal unit; and a fourth liquid crystal unit overlapping the third liquid crystal unit, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively comprises: a first transparent substrate; a first alignment film; a first electrode and a second electrode, disposed between the first transparent substrate and the first alignment film, spaced apart, and subjected to different voltages; and a second transparent substrate; A second alignment film; a third and a fourth strip electrode, located between the second transparent substrate and the second alignment film, are spaced apart and are subjected to different voltages; The liquid crystal layer is located between the first alignment film and the second alignment film. The first, second, third, and fourth strip electrodes of the first liquid crystal unit and the first, second, third, and fourth strip electrodes of the third liquid crystal unit have a first shape. The first, second, third, and fourth strip electrodes of the second liquid crystal unit and the first, second, third, and fourth strip electrodes of the fourth liquid crystal unit have a second shape different from the first shape. The third liquid crystal unit is a liquid crystal unit obtained by rotating the first liquid crystal unit by 90°, and the fourth liquid crystal unit is a liquid crystal unit obtained by rotating the third liquid crystal unit by 90°.

3. The liquid crystal device according to claim 1 or 2, wherein, The first shape is a straight line shape, and the second shape is a wave shape.

4. The liquid crystal device according to claim 1 or 2, wherein, The first shape is a straight line, and the second shape is a zigzag shape.

5. The liquid crystal device according to claim 1 or 2, wherein, The first shape is a zigzag shape, and the second shape is a wave shape.

6. A liquid crystal device comprising: a first liquid crystal unit; a second liquid crystal unit overlapping the first liquid crystal unit; a third liquid crystal unit overlapping the second liquid crystal unit; and a fourth liquid crystal unit overlapping the third liquid crystal unit, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively comprises: a first transparent substrate; a first alignment film; a first electrode and a second electrode, disposed at a distance from each other between the first transparent substrate and the first alignment film, and subjected to different voltages; and a second transparent substrate; A second alignment film; a third and a fourth strip electrode, located between the second transparent substrate and the second alignment film, are spaced apart and are subjected to different voltages; The liquid crystal layer is located between the first alignment film and the second alignment film. The first liquid crystal unit to the fourth liquid crystal unit respectively have a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode with a tortuous shape. The first transparent substrate of the second liquid crystal unit is a substrate obtained by rotating the first transparent substrate of the first liquid crystal unit by 180°. The second transparent substrate of the second liquid crystal unit is a substrate obtained by rotating the second transparent substrate of the first liquid crystal unit by 180°. The third liquid crystal unit is a liquid crystal unit obtained by rotating the first liquid crystal unit clockwise by 90°. The fourth liquid crystal unit is a liquid crystal unit obtained by rotating the second liquid crystal unit clockwise by 90°.

7. A liquid crystal device comprising: a first liquid crystal unit; a second liquid crystal unit overlapping the first liquid crystal unit; a third liquid crystal unit overlapping the second liquid crystal unit; and a fourth liquid crystal unit overlapping the third liquid crystal unit, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively comprises: a first transparent substrate; a first alignment film; a first electrode and a second electrode, disposed at a distance from the first transparent substrate and the first alignment film, and subjected to different voltages; and a second transparent substrate; A second alignment film; a third and a fourth strip electrode, located between the second transparent substrate and the second alignment film, are spaced apart and are subjected to different voltages; And a liquid crystal layer, located between the first alignment film and the second alignment film, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively have a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode in a zigzag shape; the second liquid crystal unit is obtained by inverting the front and back of the first liquid crystal unit and then rotating it counterclockwise by 90°; the third liquid crystal unit is obtained by rotating the first liquid crystal unit clockwise by 90°; and the fourth liquid crystal unit is obtained by inverting the front and back of the first liquid crystal unit and then rotating it clockwise by 90°.

8. The liquid crystal device according to claim 6 or 7, wherein, The first and second electrodes of the first liquid crystal unit disposed on the first transparent substrate are linearly symmetrical with respect to the first and second electrodes of the second liquid crystal unit disposed on the first transparent substrate about a first direction as an axis; the third and fourth electrodes of the first liquid crystal unit disposed on the second transparent substrate are linearly symmetrical with respect to the third and fourth electrodes of the second liquid crystal unit disposed on the second transparent substrate about a second direction intersecting the first direction as an axis; the first and second electrodes of the third liquid crystal unit disposed on the first transparent substrate are linearly symmetrical with respect to the first and second electrodes of the fourth liquid crystal unit disposed on the first transparent substrate about the second direction as an axis; the third and fourth electrodes of the third liquid crystal unit disposed on the second transparent substrate are linearly symmetrical with respect to the first direction as an axis.

9. The liquid crystal device according to claim 6 or 7, wherein, The second liquid crystal unit is obtained by rotating the first liquid crystal unit by 180°, and the fourth liquid crystal unit is obtained by rotating the third liquid crystal unit by 180°.

10. A liquid crystal device comprising: a first liquid crystal unit; a second liquid crystal unit overlapping the first liquid crystal unit; a third liquid crystal unit overlapping the second liquid crystal unit; and a fourth liquid crystal unit overlapping the third liquid crystal unit, wherein the first liquid crystal unit to the fourth liquid crystal unit respectively comprises: a first transparent substrate; a first alignment film; a first electrode and a second electrode, disposed between the first transparent substrate and the first alignment film, spaced apart, and subjected to different voltages; and a second transparent substrate; A second alignment film; a third and a fourth strip electrode, located between the second transparent substrate and the second alignment film, are spaced apart and are subjected to different voltages; And a liquid crystal layer, located between the first alignment film and the second alignment film, wherein the first strip electrode of the first liquid crystal unit, the second strip electrode of the second liquid crystal unit, the first strip electrode of the third liquid crystal unit, and the second strip electrode of the fourth liquid crystal unit have a first shape, and the second strip electrode of the first liquid crystal unit, the first strip electrode of the second liquid crystal unit, the second strip electrode of the third liquid crystal unit, and the first strip electrode of the fourth liquid crystal unit have a second shape different from the first shape, wherein the third liquid crystal unit is a liquid crystal unit obtained by rotating the first liquid crystal unit by 90°, and the fourth liquid crystal unit is a liquid crystal unit obtained by rotating the third liquid crystal unit by 90°.

11. The liquid crystal device according to claim 10, wherein, The first shape is a zigzag shape, and the second shape is a wave shape.

12. The liquid crystal device according to claim 10, wherein, The first shape is a straight line, and the second shape is a zigzag shape.

13. The liquid crystal device according to claim 10, wherein, The first shape is a straight line shape, and the second shape is a wave shape.

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