JP2010210811A - Liquid crystal display device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device which prevents deterioration of display quality. <P>SOLUTION: A first substrate 101 has a first electrode PE, a second electrode CE arranged on the first electrode PE via an insulating layer, and a third electrode COM1 arranged in parallel with the second electrode CE. The first and second substrates 101 and 102 are arranged so as to contact a liquid crystal layer LQ, and have a pair of oriented films AF1 and AF2 which are subjected to rubbing processing to specify an initial orientation direction of liquid crystal molecules LQA included in the liquid crystal layer LQ. The first electrode PE has a slit SL for generating an electric field in a direction which makes an acute angle in a first direction with respect to the initial orientation direction of the liquid crystal molecules LQA between the first and second electrodes PE and CE in an area facing the second electrode CE, and a convex part PEA which generates an electric field in a direction which inclines at an acute angle in a second direction with respect to the initial orientation direction of the liquid crystal molecules LQA between the first electrode PE and the third electrode COM1. The second substrate 102 has a light shading layer BM that faces an area where the convex part PEA is arranged. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to an active matrix type liquid crystal display device.

  In general, a liquid crystal display device includes a liquid crystal display panel including an array substrate, a counter substrate disposed to face the array substrate, and a liquid crystal layer sandwiched between the array substrate and the counter substrate.

  In recent years, liquid crystal display devices have been required to have higher definition, smaller size, and wider viewing angle. As a method for achieving a wide viewing angle, an electric field in the in-plane direction, that is, a transverse electric field is generated with respect to the transparent substrate, and the transmittance is changed by rotating liquid crystal molecules in a plane parallel to the substrate by the transverse electric field. Liquid crystal display devices in IPS (In Plane Switching Mode) mode and FFS (Fringe-Field Switching) mode have been proposed.

  2. Description of the Related Art Conventionally, in an IPS mode liquid crystal display device, a configuration using comb-like electrodes that mesh with each other has been proposed (see Patent Document 1).

Further, in an FFS mode liquid crystal display device, a counter electrode and a pixel electrode are arranged on an array substrate via an insulating layer, a slit is provided in the counter electrode, and the slit is used so that the pixel electrode and the counter electrode are used. (See Patent Document 2).
U.S. Pat. No. 3,807,831 JP 2008-65212 A

  In an IPS mode liquid crystal display device and an FFS mode liquid crystal display device, an electric field is generated from a pixel electrode toward a region outside the display pixel in a region where the pixel electrode and the counter electrode do not overlap in one pixel. In some cases, this electric field may generate a region where the rotation direction of the liquid crystal molecules is not constant.

  When a region where the rotation direction of the liquid crystal molecules is not constant is generated, a reverse domain is generated at the interface of the liquid crystals having different rotation directions of the liquid crystal molecules. When the reverse domain is applied with a high voltage, or when a surface pressing test or the like that pushes the liquid crystal display panel in the thickness direction is performed, the domain region changes and is visually recognized as uneven.

  Furthermore, when the applied voltage is lowered or the pressing force applied to the screen is released, the enlarged domain region tends to return slowly with a time constant by the force of the electric field. Therefore, the period until the domain region returns to the initial state is visually recognized as uneven.

  The above phenomenon is often visually recognized in a normally black mode liquid crystal display device in a state in which a display close to a white screen is formed, that is, in a state in which liquid crystal molecules are largely rotated from the intended alignment direction.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a liquid crystal display device that prevents display quality deterioration by suppressing the occurrence of a reverse domain region.

  A liquid crystal display device according to an aspect of the present invention includes a first substrate, a second substrate disposed to face the first substrate, and a liquid crystal layer sandwiched between the first substrate and the second substrate. And a display unit comprising a plurality of display pixels arranged in a matrix, wherein the first substrate includes a first electrode arranged in each of the plurality of display pixels, A second electrode disposed on the first electrode via an insulating layer; and a third electrode disposed in line with the second electrode, wherein the first substrate and the second substrate include the liquid crystal A pair of alignment films disposed in contact with the layer and rubbed in a predetermined direction so as to define an initial alignment direction of liquid crystal molecules contained in the liquid crystal layer, and the first electrode includes the first electrode In the region overlapping with the two electrodes, the first power A slit that generates an electric field having an acute angle in a first direction with respect to an initial alignment direction of the liquid crystal molecules, and the liquid crystal between the first electrode and the third electrode. A convex portion that generates an electric field in a second direction that is an acute angle in a direction opposite to the first direction with respect to the initial alignment direction of the molecules, and the second substrate is opposed to a region in which the convex portion is disposed. A light shielding layer is provided.

  ADVANTAGE OF THE INVENTION According to this invention, the liquid crystal display device which prevents deterioration of display quality by suppressing generation | occurrence | production of a reverse domain area | region can be provided.

  Hereinafter, a liquid crystal display device according to an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the liquid crystal display device according to the present embodiment includes an array substrate 101 and a counter substrate 102 arranged so as to face each other, and a liquid crystal layer sandwiched between the array substrate 101 and the counter substrate 102. The display unit 110 includes the LQ and the display unit 110 including a plurality of display pixels PX arranged in a matrix.

  As shown in FIGS. 2 and 4, the array substrate 101 is arranged on the insulating substrate GL1 so as to face the pixel electrode PE arranged for each display pixel PX and the pixel electrode PE through the insulating layer. And a counter electrode CE. In the liquid crystal display device according to the present embodiment, the pixel electrode PE is disposed on the insulating substrate GL1, and the counter electrode CE is disposed on the pixel electrode PE via the insulating layer. The pixel electrode PE and the counter electrode CE are formed of a transparent conductive material such as ITO (Indium Tin Oxide). An alignment film AF1 is disposed on the counter electrode CE so as to be in contact with the liquid crystal layer LQ.

  Furthermore, the array substrate 101 extends substantially parallel to the row direction in which the display pixels PX are arranged in the display unit 110 and is arranged in a region around the pixel electrode PE, and the column direction in which the display pixels PX are arranged. And a signal line XL arranged so as to extend substantially in parallel.

  The scanning line YL is connected to a scanning line driving circuit 121 arranged outside the display unit 110. The signal line XL is connected to a signal line driving circuit 120 disposed outside the display unit 110.

  In each display pixel PX, a pixel switch SW is disposed in the vicinity of the position where the scanning line YL and the signal line XL intersect. The pixel switch SW includes, for example, a thin film transistor as a switching element.

  The gate electrode of the pixel switch SW is electrically connected to the corresponding scanning line YL or formed integrally with the corresponding scanning line YL. The source electrode of the pixel switch SW is electrically connected to the corresponding signal line XL or formed integrally with the corresponding signal line XL. The drain electrode of the pixel switch SW is electrically connected to the pixel electrode PE.

  When the scanning line YL is selected by the scanning line driving circuit 121, the source-drain path of the pixel switch SW becomes conductive, and a video signal is applied to the pixel electrode PE from the corresponding signal line XL via the pixel switch SW. .

  As shown in FIGS. 2 and 4, in the liquid crystal display device according to the present embodiment, the first common electrode COM1 is arranged above the signal line XL and the scanning line YL so as to be aligned with the counter electrode CE. A second common electrode COM2 is disposed so as to extend substantially parallel to YL. As shown in FIG. 2, the first common electrode COM1 is arranged so as to surround the pixel electrode PE. The first common electrode COM1 is made of, for example, ITO.

  A counter voltage is supplied from a counter electrode drive circuit (not shown) to the first common electrode COM1 and the second common electrode COM2, and a counter voltage is supplied from the second common electrode COM2 to the counter electrode CE.

  In the case of a color display type liquid crystal display device, as shown in FIG. 4, the counter substrate 102 includes a light shielding layer BM, a color filter layer CF, and a color filter arranged so as to surround the display pixel PX on the insulating substrate GL2. An alignment film is disposed on the layer CF so as to be in contact with the liquid crystal layer LQ.

  The alignment film AF1 of the array substrate 101 and the alignment film AF2 of the counter substrate 102 face each other through the liquid crystal layer LQ, and are rubbed in a predetermined direction to control the alignment direction of the liquid crystal molecules LQA contained in the liquid crystal layer LQ. Has been made. The initial alignment direction of the liquid crystal molecules LQA is defined by the rubbing direction in which the alignment film AF1 and the alignment film AF2 are rubbed.

  In the present embodiment, the initial alignment direction of the liquid crystal molecules LQA is the alignment direction of the liquid crystal molecules LQA in a state where no electric field is generated between the pixel electrode PE and the counter electrode CE.

  In the liquid crystal display device according to the present embodiment, the alignment film AF1 of the array substrate 101 and the alignment film AF2 of the counter substrate 102 are rubbed in the direction DA shown in FIG. The rubbing direction DA is a direction inclined clockwise by an acute angle θA with respect to the direction D1 in which the signal line XL extends.

  In the liquid crystal display device according to the present embodiment, the pixel electrode PE has a plurality of slits SL extending substantially in parallel as shown in FIG. The slits SL are arranged at substantially equal intervals in a direction substantially orthogonal to the direction in which the slit SL extends.

  The liquid crystal molecules LQA are arranged so that the alignment direction of the liquid crystal molecules LQA can be controlled corresponding to the initial alignment direction of the liquid crystal molecules LQA. In the liquid crystal display device according to the present embodiment, the slit SL extends substantially parallel to the longitudinal direction of the display pixel PX, that is, the direction D1 in which the signal line XL extends.

  When the slit SL is arranged in this way, the electric field generated between the pixel electrode PE and the counter electrode CE has an electric field component in a direction D2 substantially parallel to the direction in which the scanning line YL extends. With this electric field component, the alignment direction of the liquid crystal molecules LQA can be changed from the initial alignment direction to control the alignment direction.

  In addition, as shown in FIG. 2, the slit SL protrudes at the end thereof in the direction DB inclined to the acute angle θB counterclockwise with respect to the direction in which the signal line XL extends. The direction DB is inclined in a direction opposite to the rubbing direction DA of the alignment film AF1 with respect to the direction D1 in which the signal line XL extends.

  As shown in FIGS. 2 and 3, the pixel electrode PE includes an end PEE having a region that does not overlap with the counter electrode CE via an insulating layer in the thickness direction of the array substrate 101.

  The end PEE has a convex portion PEA in the vicinity of the corner. The convex part PEA of the end part PEE is arranged at a position facing the light shielding layer BM. Here, the pixel electrode PE has a substantially rectangular shape, and the corner portion of the end portion PEE where the convex portion PEA is disposed is the corner portion of the display pixel PW among the four corner portions of the substantially rectangular pixel electrode PE. When viewed from the center, the pixel electrode PE in the direction DB tilted at an acute angle θB in the reverse direction (counterclockwise direction) of the rotation direction of the liquid crystal molecules LQA in the vicinity of the slit SL with respect to the rubbing direction DA of the alignment film AF1. Near the corner.

  As shown in FIG. 3, the end portion PEE of the pixel electrode PE extends substantially parallel to the short side of the substantially rectangular counter electrode CE, and is disposed on the inner side of the display pixel PX than the short side of the counter electrode CE. The edge PE1 extends substantially parallel to the short side of the counter electrode CE, and is disposed on the outer side of the display pixel PX with respect to the short side of the counter electrode CE, and one end of the edge PE1 and the edge PE2. It has an end PE3 that connects one end, and an end PE4 that is connected to the other end of the end PE3 and extends substantially parallel to the signal line XL.

  The edge PE1 is disposed at a position facing the counter electrode CE. The edge PE1 is disposed at a position facing the counter electrode CE. The end side PE2 and the end side PE4 are disposed outside the display pixel PX with respect to the region where the counter electrode CE is disposed.

  The edge PE3 extends in a direction inclined at an acute angle in the direction opposite to the rotation direction of the liquid crystal molecules LQA in the vicinity of the slit SL (counterclockwise direction) with respect to the initial alignment direction of the liquid crystal molecules LQA in the vicinity of the slit SL. .

  Further, the first common electrode COM1 is opposed to the edge PE1 and extends in a direction substantially parallel to the direction D2, and the edge C2 is opposed to the edge PE3 and extends substantially parallel to the edge PE3. It has an end C3 that faces the end PE2 and extends in a direction substantially parallel to the direction D2, and an end C4 that faces the end PE4 and extends in a direction substantially parallel to the direction D1. The end side C2 connects one end of the end side C1 and one end of the end side C3. The end side C4 is connected to the other end of the end side C3.

  An interval W2 between the end side PE2 and the end side C3 is narrower than an interval W1 between the end side PE4 and the end side C4. Therefore, in the convex portion PEA of the end portion PEE, an electric field is generated more concentrated in the direction between the end side PE2 and the end side C3 than in the electric field generated between the end side PE4 and the end side C4.

  Next, the operation of the liquid crystal display device will be described. The scanning line driving circuit 121 sequentially drives the scanning lines YL and makes the source-drain paths of the pixel switches SW connected to the driven scanning lines YL conductive. The signal line driving circuit 120 applies video signals corresponding to the respective display pixels PX to the signal lines XL. A video signal is applied to the pixel electrode PE from the corresponding signal line XL via the pixel switch SW. A counter voltage is applied to the counter electrode CE via the second common electrode COM2.

  Therefore, an electric field is generated in the liquid crystal layer LQ due to the potential difference between the potential of the pixel electrode PE and the potential of the counter electrode CE. This electric field has an electric field component substantially parallel to the substrate surface direction of the array substrate 101 and an electric field component substantially orthogonal to the substrate surface direction. The electric field component substantially parallel to the substrate surface of the array substrate 101 is a component in a direction substantially orthogonal to the direction D1 in which the slit SL extends.

  In the liquid crystal display device according to the present embodiment, as shown in FIG. 4, the pixel electrode PE and the first common electrode COM <b> 1 disposed on the signal line XL are also substantially parallel to the substrate surface of the array substrate 101. In the direction, an electric field component is generated in a direction substantially orthogonal to the direction D1 in which the slit SL extends.

  The liquid crystal molecules contained in the liquid crystal layer LQ are aligned in the orientation direction due to the electric field generated between the pixel electrode PE and the counter electrode CE as described above and the electric field generated between the pixel electrode PE and the first common electrode COM1. Controlled. That is, the liquid crystal display device according to the present embodiment is a liquid crystal display device that combines the IPS mode and the FFS mode.

  In the case shown in FIG. 2, the initial alignment direction of the liquid crystal molecules is a direction along the rubbing direction DA (direction DA ′ shown in FIG. 3). When a voltage is applied to the pixel electrode PE, the counter electrode CE, and the first common electrode COM1, an electric field component in a direction D2 that is substantially orthogonal to the direction D1 in which the slit SL extends is between the pixel electrode PE and the counter electrode CE. Arise. Accordingly, in the vicinity of the region where the pixel electrode PE and the counter electrode CE overlap through the insulating layer, the liquid crystal molecules LQA rotate clockwise from the initial alignment direction to the direction D2.

  Here, the control of the liquid crystal molecules LQA in the vicinity of the region where the pixel electrode PE and the counter electrode CE do not overlap in the thickness direction of the array substrate 101 will be considered. As shown in FIG. 3, an electric field in a direction D2 substantially parallel to the direction in which the scanning line YL extends is generated between the end side PE4 of the end portion PEE and the end side C4 of the first common electrode COM1. When viewed clockwise, the direction D2 is an acute angle with respect to the initial alignment direction of the liquid crystal molecules LQA.

  Therefore, when a voltage is applied to the pixel electrode PE and the first common electrode COM1, the liquid crystal molecules LQA in the vicinity of the region between the edge PE4 of the pixel electrode PE and the edge C4 of the first common electrode COM1 Rotate clockwise from the orientation direction. That is, in the vicinity of this region, the liquid crystal molecules LQA rotate in the same direction as the liquid crystal molecules LQA in the vicinity of the region where the pixel electrode PE and the counter electrode CE overlap in the thickness direction of the array substrate 101.

  When a voltage is applied to the pixel electrode PE and the first common electrode COM1, the convex portion PEA of the pixel electrode PE constituted by a part of the end PE4, the end PE2 and a part of the end PE3, As shown in FIG. 3, when viewed counterclockwise between the part of the edge C4, the edge C3, and the edge C2 of the common electrode COM1, the liquid crystal An electric field is generated in a direction that is acute with respect to the initial alignment direction of the molecule LQA.

  Accordingly, when a voltage is applied to the pixel electrode PE and the first common electrode COM1, the liquid crystal molecules LQA in the vicinity of the convex portion of the end portion PEE rotate counterclockwise from the initial alignment direction. That is, near this region, the liquid crystal molecules LQA rotate in the opposite direction to the liquid crystal molecules LQA near the region where the pixel electrode PE and the counter electrode CE overlap in the thickness direction of the array substrate 101.

  Further, when a voltage is applied to the pixel electrode PE and the first common electrode COM1, the vicinity of a part of the edge PE3 and the edge PE1 of the pixel electrode PE and the edge C2 and the edge of the first common electrode COM1. As shown in FIG. 3, when viewed clockwise, an electric field is generated between C1 and the vicinity thereof in a direction that is an acute angle with respect to the initial alignment direction of the liquid crystal molecules LQA.

  Accordingly, when a voltage is applied to the pixel electrode PE and the first common electrode COM1, the edge PE3 of the end portion PEE and a region in the vicinity of a part of the edge PE1 and the edge C2 of the first common electrode COM1 and In a region between the vicinity of the end side C1, the liquid crystal molecules LQA rotate clockwise from the initial alignment direction. That is, near this region, the liquid crystal molecules LQA rotate in the same direction as the liquid crystal molecules LQA near the region where the pixel electrode PE and the counter electrode CE overlap.

  Therefore, the reverse domain DM is generated in the vicinity of the convex portion PEA of the end portion PEE and the concave portion REC of the first common electrode COM1. In the reverse domain DM, the liquid crystal molecules LQA are in the reverse direction with respect to the rotation direction (clockwise direction) of the liquid crystal molecules LQA near the region where the pixel electrode PE and the counter electrode CE overlap in the thickness direction of the array substrate 101. This is a region that rotates in the (counterclockwise direction).

  Here, in the liquid crystal display device according to the present embodiment, the region in which the reverse domain DM occurs is opposed to the light shielding layer BM of the counter substrate 102 in the thickness direction of the liquid crystal display panel. Furthermore, in the liquid crystal display device according to the present embodiment, the interval W2 between the end side PE2 and the end side C3 is narrower than the interval W1 between the end side PE4 and the end side C4, and therefore, the end side PE4 and the end side C4. The electric field is generated more concentrated in the vicinity of the region between the end side PE2 and the end side C3 than in the vicinity of the region in between.

  Thereby, in the liquid crystal display device according to the present embodiment, an electric field stronger than that in the vicinity of the region between the end side PE4 and the end side C4 is generated in the vicinity of the region between the end side PE2 and the end side C3. It is possible to keep the reverse domain DM in the vicinity of the convex portion of the pixel electrode PE shielded by the light shielding layer BM.

  In the liquid crystal display device according to the present embodiment, the region where the reverse domain DM occurs can be minimized. For example, when the end PEE of the pixel electrode PE has a substantially linear end extending substantially parallel to the short side of the counter electrode CE, the reverse domain DM is located at the substantially linear end of the pixel electrode PE. Along the substantially linear end side and the vicinity of the region between the first common electrode COM1. That is, a reverse domain DM extending in the direction D2 along the substantially straight edge of the pixel electrode PE is generated.

  As described above, when the reverse domain DM occurs along the substantially linear end side of the pixel electrode PE, for example, when the vicinity of the central portion of the substantially linear end side of the pixel electrode PE is pressed, the reverse domain DM Will grow toward the inside of the display pixel PX, and will be visually recognized as unevenness.

  On the other hand, in the liquid crystal display device according to the present embodiment, as shown in FIG. 3, the region where the reverse domain DM occurs is only in the vicinity of the convex portion PEA of the pixel electrode PE and is the cause of display unevenness. Generation | occurrence | production of DM itself is suppressed.

  Furthermore, in the liquid crystal display device according to the present embodiment, at the end portion PEE of the pixel electrode PE, the end side PE1 is arranged on the inner side of the display pixel PX than the short side of the counter electrode CE. Therefore, the first common electrode COM1 disposed on the scanning line YL via the insulating layer can be protruded inside the display pixel PX. As a result, it is possible to increase the shield area of the scanning line YL as a synergistic effect, and a malfunction that occurs when a signal supplied to the scanning line YL leaks to the counter substrate 102 side, for example, the scanning line YL is arranged. It is possible to prevent alignment failure of the liquid crystal molecules LQA in the vicinity of the region.

  In the liquid crystal display device according to the present embodiment, the pixel electrode PE and the first electrode are arranged in the thickness direction of the array substrate 101 even if the pixel electrode PE and the counter electrode CE do not overlap with each other through the insulating layer. An electric field is generated between the common electrode COM1. Thus, the alignment state of the liquid crystal in the vicinity of the region between the pixel electrode PE and the signal line XL can be controlled, and the aperture ratio can be improved.

  Furthermore, since the alignment state of the liquid crystal in the vicinity of the region between the signal line XL and the pixel electrode PE is controlled, no light leakage occurs near the signal line XL. Therefore, in this case, the counter substrate 102 is not necessarily provided with a light shielding layer as a countermeasure against light leakage. By arranging the light-shielding layer BM so as to face at least the end portion PEE of the pixel electrode PE, an effect specific to the present application is exhibited.

  Further, since the signal line XL and the pixel electrode PE are arranged in the same layer, the pixel electrode PE, the signal line XL, the source electrode of the pixel switch SW, and the drain electrode of the pixel switch SW can be formed in the same layer. Therefore, in this case, the drain electrode of the pixel switch SW and the pixel electrode PE can be integrally formed. In this case, a contact hole for connecting the drain electrode and the pixel electrode PE (previously formed) This means that it is not always necessary to provide (not shown). When no contact hole is provided, the aperture ratio of the liquid crystal display device can be further improved.

  That is, according to the liquid crystal display device according to the present embodiment, it is possible to provide a liquid crystal display device that prevents display quality deterioration by suppressing the occurrence of domain regions.

  Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage.

  Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine the component covering different embodiment suitably.

1 is a diagram schematically illustrating a configuration example of a liquid crystal display device according to an embodiment of the present invention. FIG. 2 is a diagram schematically illustrating an example of a configuration of display pixels of the liquid crystal display device illustrated in FIG. 1. FIG. 3 is a diagram for explaining a relationship between a direction of an electric field generated between a pixel electrode and a first common electrode of the display pixel shown in FIG. 2 and an initial alignment direction of liquid crystal molecules. The figure which shows schematically an example of the cross section of the liquid crystal display panel in line IV-IV shown in FIG.

  AF1, AF2 ... Alignment film, LQ ... Liquid crystal layer, LQA ... Liquid crystal molecule, PX ... Display pixel, PE ... Pixel electrode, PEA ... Protruding part, COM1 ... First common electrode, CE ... Counter electrode, BM ... Light shielding layer, SL ... Slit, 101 ... Array substrate, 102 ... Counter substrate, 110 ... Display section

Claims (5)

A first substrate; a second substrate arranged to face the first substrate; a liquid crystal layer sandwiched between the first substrate and the second substrate; and a plurality of arranged in a matrix A display unit comprising display pixels, and a liquid crystal display device comprising:
The first substrate is disposed so as to be aligned with the first electrode disposed on each of the plurality of display pixels, the second electrode disposed on the first electrode via an insulating layer, and the second electrode. A third electrode,
The first substrate and the second substrate are disposed in contact with the liquid crystal layer and are paired with a rubbing process in a predetermined direction so as to define an initial alignment direction of liquid crystal molecules contained in the liquid crystal layer. With an alignment film,
The first electrode is a region overlapping with the second electrode in the thickness direction of the first substrate, and is substantially parallel to the substrate surface of the first substrate between the first electrode and the second electrode. A slit for generating an electric field component in a direction inclined at an acute angle in a first direction with respect to an initial alignment direction of the liquid crystal molecules,
A direction between the first electrode and the third electrode that is substantially parallel to the substrate surface of the first substrate and tilts at an acute angle in a direction opposite to the first direction with respect to the initial alignment direction of the liquid crystal molecules. A convex portion that generates an electric field of
The liquid crystal display device, wherein the second substrate includes a light shielding layer facing a region where the convex portions are arranged. The first substrate further includes a scanning line arranged along a row where the display pixels are arranged, and a signal line arranged along a column where the display pixels are arranged,
2. The liquid crystal display device according to claim 1, wherein the third electrode is disposed on the signal line and the scanning line via an insulating layer, and further includes a concave portion that meshes with the convex portion. The convex portion is connected to the first end side extending substantially parallel to the scanning line, the second end side connected to one end of the first end side, and the other end of the first end side. A third end extending substantially parallel to the signal line,
The recess has a fourth end side facing the second end side and extending substantially parallel to the second end side, and a fifth end facing the first end side and extending substantially parallel to the direction in which the first end side extends. And a sixth end side facing the third end side and extending substantially parallel to the direction in which the third end side extends,
The direction in which the slit extends is a direction inclined at an acute angle in a direction opposite to the first direction with respect to the initial alignment direction of the liquid crystal molecules,
The liquid crystal display device according to claim 2, wherein a direction in which the second end side and the fourth end side extend is a direction inclined at an acute angle in a direction opposite to the first direction with respect to an initial alignment direction of the liquid crystal molecules.   The liquid crystal display device according to claim 3, wherein an interval between the first end side and the fourth end side is narrower than an interval between the third end side and the sixth end side. The first electrode has a substantially rectangular shape,
The convex portion is in a direction substantially parallel to the substrate surface of the first substrate, and in a direction inclined at an acute angle in a direction opposite to the rubbing direction of the alignment film with respect to the longitudinal direction of the first electrode. The liquid crystal display device according to claim 2, wherein the liquid crystal display device is disposed at a corner of one electrode.

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