JP2007233317A - Liquid crystal display apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display apparatus which can eliminate light leak in a peripheral portion of each pixel and display an image of satisfactory quality. <P>SOLUTION: A liquid crystal display apparatus includes a liquid crystal layer 3 which is disposed in a gap between one and the other substrates 2 and 1 with long axes of liquid crystal molecules being aligned in one direction, in substantially parallel to substrate surfaces. A plurality of thin film transistors supplying data signals are arranged in row and column directions on the inner surface of the substrate 2. A plurality of pixel electrodes 4 electrically connected with the thin film transistors and at least one edge part 15d for every regions corresponding to the pixel electrodes 4 laminated on the liquid crystal layer 3 side of the pixel electrodes 4 via an insulating film 14 are provided on the inner surface of the substrate 2. A common electrode 15 for generating an electric field which controls an alignment direction of the liquid crystal molecules in a plane substantially parallel with the substrate surfaces is provided between the pixel electrodes 4 and the edge parts 15d. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display element that displays by controlling the orientation direction of liquid crystal molecules in a plane substantially parallel to a substrate surface.

  As a liquid crystal display element, a liquid crystal layer in which liquid crystal molecules are aligned in a direction parallel to the substrate surface with a molecular major axis aligned in one direction is provided between a pair of substrates facing each other with a gap between the pair of substrates. Common to mutually isolated pixel electrodes for generating an electric field for controlling the orientation direction of the liquid crystal molecules in a plane substantially parallel to the substrate surface on the inner surface of one of the opposing inner surfaces of the substrate Some have electrodes.

Conventionally, the liquid crystal display element has a plurality of pixels corresponding to the common electrode on the inner surface of the one substrate, on the common electrode corresponding to each pixel region, and on the insulating layer covering the common electrode. Electrodes, a plurality of thin film transistors respectively connected to the pixel electrodes, a plurality of scanning lines for supplying gate signals to the thin film transistors in each row, and a plurality of signal lines for supplying data signals to the thin film transistors in each column It is the provided structure (refer patent document 1).
JP 2002-82357 A

  However, in the conventional liquid crystal display element, the orientation of liquid crystal molecules in the peripheral region of the pixel is disturbed due to the influence of an electric field generated between the scanning line or signal line and the pixel electrode, and light is emitted to the peripheral portion of the pixel. Leakage occurs and contrast decreases. If a black mask is provided to prevent this light leakage, there is a problem that the aperture ratio decreases and the display image becomes dark.

  An object of the present invention is to provide a liquid crystal display element capable of displaying a bright image with high contrast and high aperture ratio by eliminating light leakage at the periphery of the pixel.

The liquid crystal display element according to the first aspect of the present invention is:
A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer sealed in a gap between the pair of substrates, wherein the liquid crystal molecules are aligned substantially parallel to the substrate surface with their molecular long axes aligned in one predetermined direction;
A plurality of thin film transistors arranged in a row direction and a column direction on an inner surface of one of the pair of substrates facing the other substrate, to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
The inner surface of the one substrate is formed closer to the liquid crystal layer than the pixel electrode, with an insulating film interposed between the pixel electrode and the orientation direction of the liquid crystal molecules between the pixel electrode and the substrate surface. A common electrode that generates an electric field to be controlled in a plane substantially parallel to the
It is characterized by providing.

  In this liquid crystal display element, the common electrode is laminated at least partially with the pixel electrode, and at least one edge for defining each pixel is formed for each region corresponding to the pixel electrode. It is desirable that The common electrode has an edge portion defining each pixel for each region corresponding to the pixel electrode for generating an electric field in a direction substantially parallel to the inner surface of the substrate between the common electrode and the pixel electrode. Preferably, a plurality of edges arranged inside the pixel region are formed.

In this liquid crystal display element, on the inner surface of the one substrate, a plurality of scanning lines arranged in the row direction between the rows of the pixel electrodes and supplying scanning signals to the thin film transistors in each row, A plurality of signal lines arranged between the pixel electrode columns along the column direction and supplying display signals to the thin film transistors in each column are further provided.
The common electrode is formed on an insulating layer covering the plurality of pixel electrodes, the thin film transistor, the scanning line, and the signal line, a region between adjacent pixel electrodes with the scanning line interposed therebetween, and an adjacent pixel with the signal line interposed therebetween. A region covering at least one of the regions between the electrodes is formed in a continuous shape extending in at least one of the pixel electrode row direction and the pixel electrode column direction, and portions corresponding to the pixel electrodes are spaced apart from each other. It is preferable that a plurality of partial electrodes arranged in parallel are formed, and an electric field for controlling the orientation direction of the liquid crystal molecules is generated between the edge of each partial electrode and the pixel electrode.

  In this liquid crystal display element, the insulating film interposed between the pixel electrode and the common electrode on the one substrate is formed to cover the pixel electrode, the thin film transistor, and a wiring connected to the transistor. The planarizing film is preferably a flattening film for making the inner surface of the one substrate a flat surface.

In this liquid crystal display element, on the inner surface of the one substrate, a plurality of scanning lines arranged in the row direction between the rows of the pixel electrodes and supplying scanning signals to the thin film transistors in each row, A plurality of signal lines arranged between the pixel electrode columns along the column direction and supplying display signals to the thin film transistors in each column are further provided.
The common electrode is formed on a plurality of pixel electrodes, thin film transistors, an insulating layer that covers the scanning lines and signal lines, a region between adjacent pixel electrodes with the scanning lines interposed therebetween, and an adjacent pixel electrode with the signal lines interposed therebetween. A plurality of edges are formed in a region corresponding to the pixel electrode and arranged in parallel with each other at an interval, and the liquid crystal is disposed between the edge and the pixel electrode. It is preferable to generate an electric field that controls the orientation direction of the molecules.

  In this case, the common electrode is formed between an adjacent pixel and a transparent conductive film in which a plurality of edges are formed in parallel with each other at an interval in a region corresponding to each pixel on an insulating film of one substrate. It is preferable that the metal conductive film is formed along any one of the scanning line extending in the row direction and the signal line extending in the column direction. In addition, the common electrode is formed between an adjacent pixel and a transparent conductive film in which a plurality of edges arranged in parallel with each other at an interval in a region corresponding to each pixel are formed on an insulating film of one substrate. Of the scanning lines extending in the row direction and the signal lines extending in the column direction, it is preferable that the scanning line and the metal conductive film are formed so as to cover the scanning lines and the thin film transistors. Furthermore, the common electrode is formed between a transparent conductive film in which a plurality of edges are formed on an insulating film of one substrate and arranged in parallel with each other at an interval corresponding to each pixel, and between adjacent pixels. The scanning line extending in the row direction and the signal line extending in the column direction are formed in a portion excluding the region corresponding to the thin film transistor and covering the scanning line at least along the scanning line. It is preferable to consist of a metal conductive film. Further, in this case, it is desirable to further include a light shielding film formed in a region corresponding to the thin film transistor formed on the one substrate on the inner surface of the other substrate of the pair of substrates. Still further, the common electrode includes a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval corresponding to each pixel are formed on an insulating film of one substrate and between adjacent pixels. The metal conductive film is preferably formed along both the scanning line extending in the row direction and the signal line extending in the column direction.

  In this liquid crystal display element, the common electrode is formed substantially over the entire surface of the insulating layer covering the plurality of pixel electrodes, the thin film transistors, the scanning lines, and the signal lines, and the pixel electrodes and the pixel electrodes are formed in regions corresponding to the pixel electrodes. It is preferable that a slit for forming a plurality of edges aligned in parallel with each other is provided for generating an electric field for controlling the orientation direction of the liquid crystal molecules. In this case, the slit formed in the common electrode forms an edge that intersects obliquely other than perpendicular and parallel to the direction of the long axis of the liquid crystal molecules aligned by the alignment film formed on one substrate surface. Thus, it is preferable that the alignment film is formed in a direction that obliquely intersects the direction of the alignment treatment. The pixel electrode formed on the one substrate has a shape corresponding to the slit formed in the common electrode in a region corresponding to the pixel, and an opening is formed in a region overlapping the slit of the common electrode. It is preferable to consist of a transparent conductive film. Further, the pixel electrode formed on the one substrate has a shape corresponding to the slit formed in the common electrode in a region corresponding to the pixel, and an opening is formed in a region overlapping the slit of the common electrode. It is desirable to consist of a transparent conductive film.

  In this liquid crystal display element, the pixel electrode formed on the one substrate is preferably made of one transparent conductive film having a substantially rectangular shape having an area corresponding to the pixel.

A liquid crystal display element according to a second aspect of the present invention is
A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer sealed in a gap between the pair of substrates, wherein the liquid crystal molecules are aligned substantially parallel to the substrate surface with their molecular long axes aligned in one predetermined direction;
Thin film transistors that are arranged in a row direction and a column direction on the inner surface of one of the pair of substrates facing the other substrate, and to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
A plurality of scanning lines arranged on the inner surface of the one substrate between the row of pixel electrodes along the row direction and supplying scanning signals to the thin film transistors in each row, and columns of the pixel electrodes In between, a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
A plurality of inner surfaces of the one substrate are formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and are arranged in parallel to each other with an interval in a region corresponding to each pixel. Of the transparent conductive film in which the edge is formed, the scanning line extending in the row direction between adjacent pixels, and the signal line extending in the column direction, the scanning line and the thin film transistor are at least along the scanning line. A common electrode that generates an electric field for controlling the orientation direction of the liquid crystal molecules in a plane substantially parallel to the substrate surface between the pixel electrode and the metal conductive film formed to cover the pixel electrode;
It is characterized by providing.

  In this liquid crystal display element, the common electrode is formed substantially over the entire surface of the insulating layer covering the plurality of pixel electrodes, the thin film transistors, the scanning lines, and the signal lines, and the pixel electrodes and the pixel electrodes are formed in regions corresponding to the pixel electrodes. In order to generate an electric field for controlling the orientation direction of the liquid crystal molecules between them, they are arranged in parallel to each other at an interval, and perpendicular and parallel to the direction of the orientation treatment of the orientation film formed on one substrate surface. It is preferable that a slit that forms a plurality of edges bent in a shape is provided. Further, the pixel electrode formed on the one substrate is preferably made of one transparent conductive film having a substantially rectangular shape having an area corresponding to the pixel.

A liquid crystal display element according to a third aspect of the present invention is
A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer sealed in a gap between the pair of substrates, wherein the liquid crystal molecules are aligned substantially parallel to the substrate surface with their molecular long axes aligned in one predetermined direction;
Thin film transistors that are arranged in a row direction and a column direction on the inner surface of one of the pair of substrates facing the other substrate, and to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
A plurality of scanning lines arranged on the inner surface of the one substrate between the row of pixel electrodes along the row direction and supplying scanning signals to the thin film transistors in each row, and columns of the pixel electrodes In between, a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
A plurality of inner surfaces of the one substrate are formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and are arranged in parallel to each other with an interval in a region corresponding to each pixel. The scan line and the signal line are covered along both the transparent conductive film in which the edge portion is formed, the scan line extending in the row direction between adjacent pixels, and the signal line extending in the column direction. And a metal conductive film formed in a portion excluding a region corresponding to the thin film transistor, and the orientation direction of the liquid crystal molecules is controlled in a plane substantially parallel to the substrate surface between the pixel electrode and the pixel electrode. A common electrode for generating an electric field,
A light shielding film formed in a region corresponding to a thin film transistor formed on the one substrate on the inner surface of the other substrate of the pair of substrates;
It is characterized by providing.

  In the liquid crystal display element according to the first aspect of the present invention, the common electrode is laminated so as to cover the pixel electrode through an insulating film on the liquid crystal layer side from the pixel electrode, and for each region corresponding to the pixel electrode. And forming an electric field for controlling an orientation direction of the liquid crystal molecules in a plane substantially parallel to the substrate surface between the pixel electrode and the edge. Therefore, since the electric field other than between the pixel electrode and the common electrode generated in the peripheral portion of the pixel electrode is blocked from the liquid crystal layer, the disturbance of the alignment in the peripheral portion of the pixel is eliminated, and light leakage is prevented. be able to.

  In this liquid crystal display element, it is desirable that the common electrode is provided with slits for forming a plurality of edges arranged in parallel with each other at intervals corresponding to the plurality of pixel electrodes. By doing so, an electric field of substantially uniform strength can be generated between each edge of the common electrode and the pixel electrode, and a high quality image can be displayed.

  The liquid crystal display element is formed on the inner surface of the one substrate along each pixel electrode row, and each of the plurality of scanning lines for supplying a gate signal to the thin film transistor in each row and each pixel electrode column A plurality of signal lines for supplying data signals to the thin film transistors in each column, and the common electrode is formed on an insulating layer covering the plurality of pixel electrodes, the thin film transistors, the scanning lines, and the signal lines. And at least one of the pixel electrode row direction and the pixel electrode column direction by a region covering at least one of a region between adjacent pixel electrodes across the scanning line and a region between adjacent pixel electrodes across the signal line. The portion corresponding to the pixel electrode is formed of a plurality of partial electrodes arranged in parallel to each other at an interval, and an edge of each partial electrode and the pixel electrode Since an electric field for controlling the orientation direction of the liquid crystal molecules is generated during the period, an electric field generated between at least one of the scanning line and the signal line and the edge of the pixel electrode is shielded by the common electrode. Therefore, the disturbance of the alignment of the liquid crystal molecules in the region around the pixel due to the electric field can be eliminated, so that the light leakage around the pixel periphery is eliminated, and the image with high contrast and high aperture ratio is displayed. be able to.

  In this liquid crystal display element, the common electrode is formed so as to correspond to both a region between adjacent pixel electrodes across the plurality of scanning lines and a region between adjacent pixel electrodes across the signal line, Since it is formed of a conductive film provided with a plurality of slits for forming a plurality of partial electrodes arranged in parallel at intervals in portions corresponding to the plurality of pixel electrodes, light is transmitted over the entire periphery of the pixel peripheral portion. Leakage can be eliminated, and the potential of the plurality of partial electrodes corresponding to the pixel electrode of the common electrode and the portion corresponding to the region between the adjacent pixel electrodes can be made substantially equal, A high-quality image can be displayed by generating a substantially uniform electric field between each edge and the pixel electrode.

  The plurality of pixel electrodes are preferably formed in a shape corresponding to the entire area of the predetermined pixel region, and in this way, the potentials of the pixel electrodes are made substantially equal throughout, An electric field having a substantially uniform strength can be generated between the edge of the common electrode and the pixel electrode, and a higher quality image can be displayed.

  Further, in this liquid crystal display element, a common electrode line made of a low-resistance metal conductive film is formed in a portion corresponding to the region between the pixel electrodes of the common electrode along the entire length of the region along the scanning line and the signal line. By providing, the potentials of the common electrodes of a plurality of pixels arranged in the row direction and the column direction can be made substantially equal, and an image having no luminance unevenness can be displayed.

  In a liquid crystal display element according to a second aspect of the present invention, the common electrode is formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and in a region corresponding to each pixel. At least scanning is performed among a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval are formed, a scanning line extending in the row direction between adjacent pixels, and a signal line extending in the column direction. And a metal conductive film formed so as to cover the scanning line and the thin film transistor, and the orientation direction of the liquid crystal molecules is controlled in a plane substantially parallel to the substrate surface between the pixel electrode and the pixel electrode. Since the electric field other than between the pixel electrode and the common electrode generated at the periphery of the pixel electrode is blocked from the liquid crystal layer, the disturbance of the alignment at the periphery of the pixel is prevented. To prevent light leakage Rukoto can, at high contrast, it is possible to perform high bright display aperture ratio. Further, since the metal conductive film is formed on the common electrode along both the scanning line and the signal line, the electric resistance of the common electrode can be reduced, and a uniform electrode can be applied to each pixel. In addition, since the metal conductive film is formed corresponding to the thin film transistor, the thin film transistor can be shielded from light and stable display can be performed.

  In this liquid crystal display element, the common electrode is arranged in parallel to each other at an interval to generate an electric field for controlling the orientation direction of the liquid crystal molecules between the pixel electrode and a region corresponding to the pixel electrode. And applying an electric field by providing slits that form a plurality of edges bent into a shape that intersect obliquely other than perpendicular and parallel to the direction of alignment treatment of the alignment film formed on one substrate surface The behavior of the liquid crystal molecules due to the liquid crystal can be stabilized, and the pixel electrode is formed of one transparent conductive film having a substantially rectangular shape, thereby facilitating manufacturing and making the electric field of each pixel uniform. Can do.

  In a liquid crystal display element according to a third aspect of the present invention, the common electrode is formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and in a region corresponding to each pixel. Along the transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval are formed, the scanning line extending in the row direction between adjacent pixels, and the signal line extending in the column direction And a metal conductive film that covers the scanning lines and the signal lines and is formed in a portion excluding a region corresponding to the thin film transistor, and the orientation direction of the liquid crystal molecules is defined between the pixel electrode and the substrate surface. Since the electric field to be controlled is generated in a plane substantially parallel to the liquid crystal layer, the electric field other than between the pixel electrode and the common electrode generated in the peripheral portion of the pixel electrode is blocked from the liquid crystal layer. , Disturbance in the orientation of the pixel periphery Without it, it is possible to prevent light leakage, a high contrast, it is possible to perform high bright display aperture ratio. Further, since the metal conductive film is formed on the common electrode along both the scanning line and the signal line, the electric resistance of the common electrode can be reduced, and a uniform electrode can be applied to each pixel. In addition, a metal conductive film is formed in a portion excluding the region corresponding to the thin film transistor, and a light shielding film is formed on the inner surface of the other substrate in the region corresponding to the thin film transistor. The load on the driver of the liquid crystal display element can be reduced by reducing the stray capacitance generated in the liquid crystal display element.

(First embodiment)
1 to 4 show a first embodiment of the present invention. FIG. 1 is a plan view of a part of a liquid crystal display element, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. 1 is a sectional view taken along line III-III, and FIG. 4 is a sectional view taken along line IV-IV in FIG.

  This liquid crystal display element is an active matrix liquid crystal display element, and as shown in FIGS. 1 to 4, liquid crystal molecules have a molecular long axis in one direction between a pair of transparent substrates 1 and 2 facing each other with a gap. A liquid crystal layer 3 that is aligned and substantially parallel to the surfaces of the substrates 1 and 2 is sealed, and one of the opposing inner surfaces of the pair of substrates 1 and 2, for example, a display viewing side (FIG. 2). And a plurality of transparent pixel electrodes 4 arranged in the row direction (left-right direction in FIG. 1) and column direction (up-down direction in FIG. 1) on the inner surface of the substrate 2 opposite to the upper side in FIG. A plurality of thin film transistors (hereinafter referred to as TFTs) 5 respectively connected to the pixel electrodes 4 and a plurality of scanning lines formed along one side of each pixel electrode row and supplying gate signals to the TFTs 5 of each row 12 and each pixel electrode row And a plurality of signal lines 13 that are formed along the respective sides and supply data signals to the TFTs 5 of each column, and on the side of the plurality of pixel electrodes 4 that faces the liquid crystal layer 3 with the insulating film 14 interposed therebetween. At least one edge 15d is formed for each region corresponding to the pixel electrode 4 and is laminated so as to cover the pixel electrode 4, and the liquid crystal of the liquid crystal layer 3 is interposed between the pixel electrode 4 and the edge 15d. A transparent common electrode 15 for generating an electric field for controlling the orientation direction of molecules in a plane substantially parallel to the surfaces of the substrates 1 and 2 is provided.

  In addition, the pair of substrates 1 and 2 are joined to each other at peripheral portions via a frame-shaped sealing material (not shown), and the liquid crystal layer 3 is surrounded by the sealing material between the pair of substrates 1 and 2. A nematic liquid crystal having a positive dielectric anisotropy is sealed in the formed region.

  The TFT 5 includes a gate electrode 6 formed on the substrate surface of the one substrate 2, a transparent gate insulating film 7 that covers the gate electrode 6 and is formed on substantially the entire surface of the substrate 2, and the gate insulation. An i-type semiconductor film 8 formed on the film 7 so as to face the gate electrode 6, and an n-type semiconductor film 9 provided on both sides of the channel region of the i-type semiconductor film 8 across the channel region. It consists of a source electrode 10 and a drain electrode 11.

  The plurality of scanning lines 12 are formed on the substrate surface of the one substrate 2 so as to be connected to the gate electrode 6 of the TFT 5, and the plurality of signal lines 13 are formed on the gate insulating film 7. It is connected to the drain electrode 11 of the TFT 5 above.

  Each of the plurality of pixel electrodes 4 is formed on the gate insulating film 7 by a transparent conductive film such as an ITO film in a shape corresponding to the entire area of the predetermined substantially rectangular pixel region. Yes.

  That is, the pixel electrode 4 is formed of one transparent conductive film having a substantially rectangular shape having an area corresponding to the pixel, and the pixel electrode 4 is formed at one corner of the pixel electrode 4. The source electrode 10 of the corresponding TFT 5 is connected.

  The plurality of pixel electrodes 4 have a shape corresponding to the entire area of the predetermined pixel region on the gate insulating film 7 by a transparent conductive film such as an ITO film, and have a substantially rectangular shape. The source electrode 10 of the TFT 5 corresponding to the pixel electrode 4 is connected to one corner of the pixel electrode 4.

  Further, a transparent interlayer insulating film 14 covering the plurality of pixel electrodes 4, the TFTs 5, the scanning lines 12 and the signal lines 13 is formed on the inner surface of the one substrate 2 over the entire surface, and the common electrode 15 is formed on the insulating layer composed of the gate insulating film 7 and the interlayer insulating film 14 so as to cover the pixel electrode 4.

  The common electrode 15 includes a peripheral portion 15b, which is a region between the pixel electrodes 4 and 4 adjacent to each other with the plurality of pixel electrodes 4 and the scanning line 12 interposed therebetween, and the pixel electrodes 4 and 4 adjacent to each other with the signal line 13 interposed therebetween. A plurality of slits 16 are formed over a portion corresponding to both of the peripheral portions 15c as a region between the plurality of slits 16 to form a plurality of partial electrodes 15a arranged in parallel at intervals in the regions corresponding to the plurality of pixel electrodes 4, respectively. These partial electrodes 15a form a plurality of edge portions 15d arranged parallel to each other at intervals to generate an electric field for controlling the orientation direction of the liquid crystal molecules between the partial electrodes 15a. It is made of a transparent conductive film such as an ITO film.

  In this embodiment, four slits 16 along the column direction are provided in parallel to each other at portions corresponding to the plurality of pixel electrodes 4 of the transparent conductive film, and three partial electrodes 15a are provided between these slits. Is forming.

  The width of the plurality of partial electrodes 15a formed in the portion corresponding to the pixel electrode 4 of the common electrode 15 is set to be approximately the same as the interval between adjacent partial electrodes 15a (the width of the slit 16).

  The common electrode 15 is a region corresponding to the area between the adjacent pixel electrodes 4 and 4 across the scanning line 12, and the peripheral portion 15 c of the pixel electrode has both side edges adjacent to the adjacent pixel electrode 4. The widths of the two peripheral portions are opposed to each other.

  Further, the plurality of slits 16 are formed to have substantially the same length as the width of the pixel electrode 4 in the column direction. Therefore, the width between the ends of the slits 16 and 16 corresponding to the pixel electrode 4 is Both side edges are formed so as to overlap with the peripheral portions of both of the adjacent pixel electrodes 4.

  Note that the one substrate (substrate opposite to the observation side) 2 has a terminal array portion extending outward from the other substrate 1 at the edge of one or both ends in the row direction and the column direction. The plurality of scanning lines 12 and the signal lines 13 are connected to the plurality of scanning line terminals and the signal line terminals arranged in the terminal arrangement portion, and the common electrode 15 has one outer peripheral edge. It is connected to a common electrode terminal formed in the terminal array part via a lead wiring derived from the part or a plurality of places.

  On the other hand, a light-shielding film 17 is provided on the inner surface of the other substrate 1 so as to face each of the plurality of TFTs 5 to prevent malfunction of the TFTs 5 due to light, and the plurality of pixel electrodes 4 and the common electrode 15 corresponding to a plurality of pixels (regions in which the alignment state of liquid crystal molecules is controlled by an electric field generated between the pixel electrode 4 and the side edge of each partial electrode 15a of the common electrode 15). , Red, green and blue color filters 18R, 18G and 18B are provided.

  Further, horizontal alignment films 19 and 20 are provided on the inner surfaces of the regions surrounded by the frame-shaped sealing material of the pair of substrates 1 and 2 so as to cover the common electrode 15 and the color filters 18R, 18G, and 18B, respectively. ing.

  These alignment films 19 and 20 are opposite to each other along a direction obliquely intersecting with a predetermined angle in a range of 5 ° to 15 ° with respect to the length direction of each partial electrode 15a of the common electrode 15. The liquid crystal molecules of the liquid crystal layer 3 are aligned substantially in parallel with the surfaces of the substrates 1 and 2 with the molecular long axes aligned with the alignment treatment direction of the alignment films 19 and 20. Oriented.

  Although not shown in the figure, the liquid crystal display element includes a pair of polarizing plates disposed on the outer surfaces of the pair of substrates 1 and 2, respectively, and one of the polarizing plates. Is arranged with its transmission axis substantially parallel to the alignment treatment of the alignment films 19 and 20, and the other polarizing plate has its transmission axis substantially perpendicular or parallel to the transmission axis of the one polarizing plate. Are arranged.

  In this liquid crystal display element, a display signal is applied to the plurality of pixel electrodes 4 via the TFTs 5, whereby the edge of each partial electrode 15 a of the common electrode 15 and the partial electrodes 15 a and 15 a of the pixel electrode 4. An electric field is generated between the corresponding portions, and the orientation direction of the liquid crystal molecules is controlled and displayed in a plane substantially parallel to the surfaces of the substrates 1 and 2 by the electric field.

  In this liquid crystal display element, the common electrode 15 is laminated on the liquid crystal layer 3 side of the pixel electrode 4 so as to cover the pixel electrode 4 with an insulating film (interlayer insulating film) 14 interposed therebetween, and the pixel electrode 4 At least one edge 15d is formed for each region corresponding to, and the orientation direction of the liquid crystal molecules is substantially parallel to the surfaces of the substrates 1 and 2 between the pixel electrode 4 and the edge 15d. Since the electric field to be controlled inside is generated, the electric field other than between the pixel electrode 4 and the common electrode 15 generated in the periphery of the pixel electrode 4 is blocked from the liquid crystal layer 3. It is possible to prevent the light leakage by eliminating the disturbance in the orientation of the peripheral portion.

  Further, in this liquid crystal display element, a plurality of slits 16 are formed in the common electrode 15 for forming a plurality of edge portions 15 d arranged in parallel with each other at intervals corresponding to the plurality of pixel electrodes 4. Therefore, an electric field having a substantially uniform intensity can be generated between each edge 15d of the common electrode 15 and the pixel electrode 4, and a high-quality image can be displayed.

  The liquid crystal display element of this embodiment is formed on the inner surface of the one substrate 2 along each pixel electrode row, and a plurality of scanning lines 12 for supplying gate signals to the TFTs 5 in each row, and each pixel electrode column And a plurality of signal lines 13 for supplying data signals to the TFTs 5 in each column are provided, and the common electrode 15 includes the plurality of pixel electrodes 4, the TFTs 5, the scanning lines 12, and the signal lines 13. The scanning line 12 is placed on the insulating layer (the laminated film of the gate insulating film 7 covering the gate electrode 6 and the scanning line 12 of the TFT 5 and the interlayer insulating film 14 covering the pixel electrode 4, the TFT 5 and the signal line 13). The pixel electrode extends in the pixel electrode row direction and the pixel electrode column direction by a region that covers both the region between the adjacent pixel electrodes 4 and 4 and the region between the adjacent pixel electrodes 4 and 4 with the signal line 13 interposed therebetween. Formed in the shape before A portion corresponding to the pixel electrode 4 is composed of a plurality of partial electrodes 15 a arranged in parallel with each other at an interval, and the orientation direction of the liquid crystal molecules is set between the edge of each partial electrode 15 a and the pixel electrode 4. In order to generate the electric field to be controlled, the electric field generated between the scanning line 12 and the signal line 13 and the edge of the pixel electrode 4 is shielded by the common electrode 15, and the alignment of liquid crystal molecules around the pixel by the electric field is controlled. Disturbance can be eliminated, and therefore light leakage between adjacent pixels can be eliminated, and a good quality image can be displayed.

  That is, in the liquid crystal display element, the common electrode 15 is formed between a region between adjacent pixel electrodes 4 and 4 with the scanning line 12 interposed therebetween and a region between adjacent pixel electrodes 4 and 4 with the signal line 13 interposed therebetween. Formed by a conductive film provided with a plurality of slits 16 formed corresponding to both and corresponding to the plurality of pixel electrodes 4 and forming a plurality of partial electrodes 15a arranged in parallel at intervals, respectively. Therefore, both the electric field generated between the scanning line 12 and the edge of the pixel electrode 4 and the electric field generated between the signal line 13 and the edge of the pixel electrode 4 are It can be shielded by the portions 15b and 15c corresponding to the region between the adjacent pixel electrodes 4 and 4.

  Therefore, an electric field generated between the scanning line 12 and the edge of the pixel electrode 4 and an electric field generated between the signal line 13 and the edge of the pixel electrode 4 act on the liquid crystal layer 3, The electric field does not disturb the alignment of the liquid crystal molecules in the region between the adjacent pixels, and thus light leakage can be eliminated over the entire periphery of the pixel periphery.

  In addition, in the liquid crystal display element, the common electrode 15 is formed of a conductive film provided with a plurality of slits 16 for forming a plurality of partial electrodes 15a in portions corresponding to the plurality of pixel electrodes 4, respectively. The potentials of the plurality of partial electrodes 15a corresponding to the pixel electrode 4 of the common electrode 15 and the portions 15b and 15c corresponding to regions between the adjacent pixel electrodes 4 and 4 are made substantially equal to each other. A substantially uniform electric field is generated between the edge of each partial electrode 15a of the electrode 15 and the portion of the pixel electrode 4 corresponding to the portion between the partial electrodes 15a, and the liquid crystal is spread over the entire area of the pixel. The molecular orientation can be controlled uniformly.

  For this reason, this liquid crystal display element has no light leakage between adjacent pixels across the scanning line 12 and between adjacent pixels across the signal line 13. Therefore, it is not necessary to provide a black mask that blocks leakage light around the pixel, and the aperture ratio is increased, so that a bright and high-contrast image can be displayed. Further, since the pixel electrode 4 is arranged on the substrate side with respect to the common electrode 15, it is not necessary to provide a through hole or the like for connection with the source electrode of the TFT 5. The aperture ratio does not decrease due to. In addition, since the common electrode 15 is formed so as to be electrically connected over substantially the entire surface of the substrate, a high-quality image in which the light transmittance of each pixel is uniform over the entire area of the pixel can be obtained. Can be displayed.

  Further, in this liquid crystal display element, since the plurality of pixel electrodes 4 are formed in a shape corresponding to the entire area of the predetermined pixel region, the potentials of the pixel electrodes 4 are made substantially equal throughout. An electric field having a more uniform strength is generated between an edge of each partial electrode 15a of the common electrode 15 and a portion of the pixel electrode 4 corresponding to the portion between the partial electrodes 15a, and liquid crystal molecules are spread over the entire area of the pixel. Can be controlled more uniformly, so that a higher quality image can be displayed.

(Second Embodiment)
5 and 6 show a second embodiment of the present invention. FIG. 5 is a plan view of a part of the liquid crystal display element, and FIG. 6 is a sectional view taken along line VI-VI in FIG.

  In the liquid crystal display element of this embodiment, a common electrode line 21 made of a low-resistance metal conductive film is provided over the entire length of the region corresponding to the region between the pixel electrodes 4 and 4 of the common electrode 15. The other configurations are the same as those of the first embodiment described above. Therefore, the same members as those in the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  The common electrode line 21 is formed on the interlayer insulating film 14 between the adjacent pixel electrodes 4 and 4 with the scanning line 12 in between and the adjacent pixel electrodes 4 and 4 with the signal line 13 in between. One of the regions, for example, corresponding to the region between the adjacent pixel electrodes 4 and 4 across the signal line 13, is formed in parallel with the signal line 13 at a position overlapping the signal line 13. The common electrode line 21 is commonly connected outside the array region of the pixel electrodes 4, and the common connection portion is connected to a common electrode terminal formed in the terminal array portion of one substrate 2.

  The common electrode 15 is formed on the interlayer insulating film 14 so as to overlap the common electrode line 21.

  In the liquid crystal display element of this embodiment, a common electrode line 21 made of a low-resistance metal conductive film is provided over the entire length of the region corresponding to the region between the pixel electrodes 4 and 4 of the common electrode 15. Therefore, the potentials of the common electrodes 15 of a plurality of pixels arranged in the row direction and the column direction can be made substantially equal, and an image without luminance unevenness can be displayed.

  In this embodiment, the common electrode line 21 is provided in a portion corresponding to the region between the adjacent pixel electrodes 4 and 4 across the signal line 13 of the common electrode 15, but the common electrode line 21 is scanned. You may provide in the part corresponding to the area | region between adjacent pixel electrodes 4 and 4 on both sides of the line 12. FIG. The common electrode line 21 may be provided on the common electrode 15.

  In the first and second embodiments described above, the common electrode 15 is adjacent to the region between the adjacent pixel electrodes 4 and 4 across the plurality of pixel electrodes 4 and the scanning lines 12 and the signal line 13 is interposed therebetween. The common electrode 15 is formed so as to correspond to both the region between the pixel electrodes 4, 4, and the common electrode 15 is connected to the region between the pixel electrodes 4, 4 adjacent to each other across the plurality of pixel electrodes 4 and the scanning line 12. You may form corresponding to either one of the area | regions between the pixel electrodes 4 and 4 adjacent on both sides of the line 13. FIG.

  Also in this case, the electric field generated between at least one of the scanning line 12 and the signal line 13 and the edge of the pixel electrode 4 is shielded by the common electrode 15, and the liquid crystal molecules in the region between adjacent pixels due to the electric field are shielded. Therefore, it is possible to eliminate the leakage of light between adjacent pixels and display an image with good quality.

  As described above, the common electrode 15 is formed between the region between the adjacent pixel electrodes 4 and 4 with the plurality of pixel electrodes 4 and the scanning line 12 interposed therebetween and the region between the adjacent pixel electrodes 4 and 4 with the signal line 13 interposed therebetween. In the case of forming corresponding to either one, the common electrode 15 is formed corresponding to the region between the plurality of pixel electrodes 4 and the adjacent pixel electrodes 4 for each pixel row or each pixel column. A plurality of partial electrodes provided with a plurality of slits or comb-shaped elongated cutout portions that form a plurality of partial electrodes 15a arranged in parallel at intervals, respectively, at portions corresponding to the plurality of pixel electrodes 4; These conductive electrodes may be formed of a conductive film including a connection portion that commonly connects the end portions of these partial electrodes.

(Third embodiment)
7, 8 and 9 show a third embodiment of the present invention. FIG. 7 is a plan view of a part of the liquid crystal display element, and FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 9 is a cross-sectional view taken along line IX-IX in FIG.

  In the liquid crystal display element of this embodiment, a common electrode line 121 made of a low-resistance metal conductive film is adjacent to a region between adjacent pixel electrodes 4 and 4 with the signal line 13 in between, and adjacent to the scanning line 12 in between. It is formed in a lattice shape so as to correspond to both of the regions between the matching pixel electrodes 4 and 4, and the other configuration is the same as that of the second embodiment described above. Therefore, the same members as those in the second embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In this liquid crystal display element, a common electrode line 121 made of a low-resistance metal conductive film has a signal line and a region between adjacent pixel electrodes 4 and 4 on the interlayer insulating film 14 with the scanning line 12 interposed therebetween. A column wiring portion 121a extending in parallel with the signal line 13 at a position overlapping the signal line 13 so as to correspond to both of the regions between the adjacent pixel electrodes 4 and 4 across the 13 and the scanning line 12 A row wiring portion 121b extending in parallel with the scanning line 12 is formed in a shape connected to each other at a position overlapping with the scanning line 12. That is, the common electrode line 121 is formed in a lattice shape surrounding the outer four sides of the pixel electrode 4 by the column wiring portion 121a and the row wiring portion 121b. In the row wiring portion 121b formed in parallel with the scanning line 12 of the common electrode line 121, a region corresponding to the TFT 5 is formed wide and a light shielding portion 121c covering the TFT 5 is formed.

  The common electrode 15 is formed over the interlayer insulating film 14 and the common electrode line 121.

  In other words, in this liquid crystal display element, the common electrode 15 is formed on the insulating film 14 of one substrate with a plurality of edge portions 15d arranged parallel to each other at intervals in regions corresponding to the respective pixels. And a metal conductive film formed along both the scanning line 12 extending in the row direction between adjacent pixels and the signal line 13 extending in the column direction.

  The liquid crystal display element of this embodiment is formed of a low resistance metal conductive film along the scanning line 12 and the signal line 13 in a portion corresponding to the region between the adjacent pixel electrodes 4 and 4 of the common electrode 15. Since the common electrode line 121 is provided, the potentials of the common electrodes 15 of a plurality of pixels arranged in the row direction and the column direction can be made substantially equal, and an image without uneven brightness can be displayed. Further, since the light shielding portion 121c is formed in the row wiring portion 121b formed along the signal line 13, the semiconductor layer of the TFT 5 can be shielded from light. Therefore, it is not necessary to form a light-shielding film on the opposing observation-side substrate, and the aperture ratio can be increased.

(Fourth embodiment)
10 and 11 show a fourth embodiment of the present invention. FIG. 10 is a plan view of a part of the liquid crystal display element, and FIG. 11 is a cross-sectional view taken along line XI-XI in FIG.

  In the liquid crystal display element of this embodiment, a common electrode line 221 made of a low-resistance metal conductive film is adjacent to a region between adjacent pixel electrodes 4 and 4 with the signal line 13 in between, and adjacent to the scanning line 12 in between. A light-shielding film 217 is formed in a region corresponding to both the regions between the matching pixel electrodes 4 and 4 in a grid pattern and excluding the region corresponding to the TFT 5, and a light-shielding film 217 is formed in the region facing the TFT 5 on the opposite substrate. In other respects, the configuration is the same as that of the third embodiment described above. Therefore, the same members as those in the third embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  In this liquid crystal display element, a common electrode line 221 made of a low-resistance metal conductive film has a region between adjacent pixel electrodes 4 and 4 on the interlayer insulating film 14 with the scanning line 12 interposed therebetween, and the signal. A column wiring portion 221a extending in parallel with the signal line 13 at a position overlapping the signal line 13 so as to correspond to both of the regions between adjacent pixel electrodes 4 and 4 across the line 13, and the scanning line A row wiring portion 221 b extending in parallel with the scanning line 12 is formed in a shape connected to each other at a position overlapping with the scanning line 12. That is, the common electrode line 221 is formed in a lattice shape surrounding the outer four sides of the pixel electrode 4 by the column wiring portion 221a and the row wiring portion 221b. In the row wiring portion 221b formed in parallel with the scanning line 12 of the common electrode line 221, a wide portion 221c is formed in a region corresponding to the TFT 5, and an opening is formed in a portion corresponding to the TFT 5 in the wide portion 221c. 221d is formed.

  The transparent conductive film is formed over the interlayer insulating film 14 and over the common electrode line 221 excluding the opening 221d of the row wiring portion 221b. Therefore, the common electrode 15 made of the transparent conductive film and the metal conductive film is formed in a region other than the region above the TFT 5.

  A light shielding film 217 is provided in a region corresponding to the TFT on the inner surface of the observation-side substrate 1 facing the substrate 2 on the opposite side to the observation side.

  Thus, in this liquid crystal display element, the common electrode 15 is formed on the liquid crystal layer 3 side from the pixel electrode 4 so as to correspond to the pixel electrode 4 via the insulating film 14 and corresponds to each pixel. A transparent conductive film in which a plurality of edges are arranged in parallel with each other at an interval, a scanning line 12 extending in a row direction between adjacent pixels, and a signal line 13 extending in a column direction Along the both lines, a metal conductive film is formed on the scanning line 12 and the signal line 13 and formed in a portion excluding the region corresponding to the thin film transistor 5. A light shielding film 217 is disposed in a region corresponding to the TFT 5.

  The liquid crystal display element of this embodiment is formed of a low resistance metal conductive film along the scanning line 12 and the signal line 13 in a portion corresponding to the region between the adjacent pixel electrodes 4 and 4 of the common electrode 15. Since the common electrode line 221 is provided, the potential of the common electrode 15 of a plurality of pixels arranged in the row direction and the column direction can be made substantially equal, and an image without unevenness in luminance can be displayed. Further, since the common electrode 15 made of a transparent conductive film and a metal conductive film is formed in a region other than the TFT 5, the stray capacitance formed between the common electrode 15 and the TFT 5 is reduced. And the load on the driver of the liquid crystal display element can be reduced. Further, since it is only necessary to form the light shielding film 217 that shields only the TFT 5 on the other substrate (observation side substrate) 1, the aperture ratio of each pixel can be increased.

(Fifth embodiment)
In the liquid crystal display elements of the first to fourth embodiments described above, the common electrode 15 is provided with the slit 16 parallel to the signal line 13, but the orientation direction of the liquid crystal molecules is set between the pixel electrode 4. The common electrode for generating an electric field to be controlled in a plane substantially parallel to the surfaces of the substrates 1 and 2 may be provided with a slit inclined obliquely with respect to the signal line 13.

  FIG. 12 is a plan view of a part of a liquid crystal display device showing a fifth embodiment of the present invention. In this figure, a TFT 5 provided on the inner surface of one substrate (substrate opposite to the observation side) 2 is shown. The scanning line 12 and the signal line 13 are omitted. Since the fifth embodiment is different from the third embodiment described above only in the shape of the common electrode and the other configurations are the same, the same members are denoted by the same reference numerals. The description is omitted.

  In the liquid crystal display element of this embodiment, the common electrode 115 is provided with slits 116 that are inclined with respect to the signal line 13. The common electrode 115 is scanned with the plurality of pixel electrodes 4 and the TFTs 5. Insulating layer insulating layer covering line 12 and signal line 13 (stacked film of gate insulating film 7 covering gate electrode 6 and scanning line 12 of TFT 5 and interlayer insulating film 14 covering pixel electrode 4, TFT 5 and signal line 13) The electrode is formed substantially over the entire surface, and is parallel to each other at an interval for generating an electric field for controlling the orientation direction of the liquid crystal molecules between the pixel electrode 4 in a region corresponding to the pixel electrode 4. And a plurality of slits forming a plurality of edge portions 115d bent into a shape. 1 16 is formed of a transparent conductive film provided with 16.

  That is, in this liquid crystal display element, a plurality of partial electrodes 115a arranged in parallel at intervals are provided by providing a plurality of slits 16 bent in a <shape in regions corresponding to the plurality of pixel electrodes 4 of the common electrode 115, respectively. These partial electrodes 115a form edge portions 115d that are bent into a shape that obliquely intersects the alignment treatment direction 20a of the alignment film 20 on the inner surface of the one substrate 2.

  According to this configuration, the pixel electrode 4 and the common electrode 115 are applied to the liquid crystal molecules in the initial alignment state in which the molecular major axes are aligned in the alignment treatment direction of the alignment films 19 and 20 on the inner surfaces of the pair of substrates 1 and 2. When a voltage is applied between the liquid crystal molecules, an electric field in a direction obliquely intersecting with the molecular long axis in the initial alignment state is applied. It is possible to prevent the alignment of the liquid crystal molecules in the liquid crystal from being disturbed.

  The shape of the common electrode 115 in this embodiment can be applied to any of the first to fourth embodiments described above.

(Sixth embodiment)
In the first to fifth embodiments described above, the plurality of pixel electrodes 4 are formed in a substantially rectangular shape corresponding to the entire area of a predetermined pixel region. The electrode 15 may be formed in a comb shape corresponding to a portion between the plurality of partial electrodes 15a and 15a.

  FIG. 13 is a cross-sectional view of a part of a liquid crystal display device showing a sixth embodiment of the present invention. The fifth embodiment is different from the third embodiment described above only in the shape of the pixel electrode, and the other configurations are the same. Therefore, the same members are denoted by the same reference numerals. The description is omitted.

  In the liquid crystal display element of this embodiment, the pixel electrode 104 is formed of a plurality of partial electrodes (hereinafter referred to as pixel partial electrodes) each having a shape corresponding to a plurality of slits 16 provided in a region corresponding to the pixel electrode 104 of the common electrode 15. The plurality of pixel partial electrodes 104a correspond to the pixel electrode 104 and a plurality of partial electrodes (hereinafter referred to as a common partial electrode) 15a of the common electrode 15, respectively. It is formed by providing a plurality of slits 104b having the shape described above.

  In this embodiment, the plurality of pixel partial electrodes 104a of the pixel electrode 104 are opposed to the edges of the common partial electrodes 15a and 15a adjacent to each other on both sides of the pixel partial electrode 104a of the common electrode 15. It is desirable to form in the width to be.

  The shape of the pixel electrode 104 can be applied to any of the first to fifth embodiments described above.

  According to the liquid crystal display element of this embodiment, since the area of the pixel electrode 104 overlapping the common electrode 15 is reduced, the stray capacitance generated between the pixel electrode 104 and the common electrode 15 is reduced. The load applied to the driver of the liquid crystal display element can be reduced.

1 is a plan view of a part of a liquid crystal display device showing a first embodiment of the present invention; Sectional drawing which follows the II-II line | wire of FIG. Sectional drawing which follows the III-III line of FIG. Sectional drawing which follows the IV-IV line of FIG. The top view of a part of liquid crystal display element which shows the 2nd Example of this invention. Sectional drawing which follows the VI-VI line of FIG. The top view of a part of liquid crystal display element which shows the 3rd Example of this invention. Sectional drawing which follows the VIII-VIII line of FIG. Sectional drawing which follows the IX-IX line of FIG. The top view of a part of liquid crystal display element which shows the 4th Example of this invention. Sectional drawing which follows the XI-XI line of FIG. The top view of a part of liquid crystal display element which shows the 5th Example of this invention. Sectional drawing of the part of liquid crystal display element which shows 6th Example of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,2 ... Substrate, 3 ... Liquid crystal layer, 4,104 ... Pixel electrode, 5 ... TFT, 6 ... Gate electrode, 7 ... Gate insulating film, 8 ... i-type semiconductor film, 9 ... n-type semiconductor film, 10 ... Source Electrode, 11 ... Drain electrode, 12 ... Scanning line, 13 ... Signal line, 14 ... Interlayer insulating film, 15, 115 ... Common electrode, 15a, 115a ... Partial electrode, 16, 116 ... Slit, 17 ... Light shielding film, 18R, 18G, 18B... Color filter, 19, 20... Orientation film, 21, 121, 221.

Claims (20)

A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer sealed in a gap between the pair of substrates, wherein the liquid crystal molecules are aligned substantially parallel to the substrate surface with their molecular long axes aligned in one predetermined direction;
A plurality of thin film transistors arranged in a row direction and a column direction on an inner surface of one of the pair of substrates facing the other substrate, to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
The inner surface of the one substrate is formed closer to the liquid crystal layer than the pixel electrode, with an insulating film interposed between the pixel electrode and the orientation direction of the liquid crystal molecules between the pixel electrode and the substrate surface. A common electrode that generates an electric field to be controlled in a plane substantially parallel to the
A liquid crystal display element comprising:   The common electrode is stacked at least partially overlapping the pixel electrode, and at least one edge for defining each pixel is formed for each region corresponding to the pixel electrode. The liquid crystal display element according to claim 1.   The common electrode is configured to generate an electric field in a direction substantially parallel to the inner surface of the substrate between the common electrode and an edge defining each pixel for each region corresponding to the pixel electrode; The liquid crystal display element according to claim 1, wherein a plurality of edges arranged inside the pixel region are formed. A plurality of scanning lines arranged on the inner surface of the one substrate along the row direction between the rows of the pixel electrodes and supplying scanning signals to the thin film transistors in the rows, and between the columns of the pixel electrodes And a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
The common electrode is formed on an insulating layer covering the plurality of pixel electrodes, the thin film transistor, the scanning line, and the signal line, a region between adjacent pixel electrodes with the scanning line interposed therebetween, and an adjacent pixel with the signal line interposed therebetween. A region covering at least one of the regions between the electrodes is formed in a continuous shape extending in at least one of the pixel electrode row direction and the pixel electrode column direction, and portions corresponding to the pixel electrodes are spaced apart from each other. The plurality of partial electrodes arranged in parallel are formed, and an electric field for controlling the orientation direction of the liquid crystal molecules is generated between an edge portion of each partial electrode and the pixel electrode. Liquid crystal display element.   The insulating film interposed between the pixel electrode and the common electrode of the one substrate is formed to cover the pixel electrode, the thin film transistor, and a wiring connected to the transistor, and the inner surface of the one substrate is formed. The liquid crystal display element according to claim 1, wherein the liquid crystal display element is a flattening film for forming a flat surface. A plurality of scanning lines arranged on the inner surface of the one substrate along the row direction between the rows of the pixel electrodes and supplying scanning signals to the thin film transistors in the rows, and between the columns of the pixel electrodes And a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
The common electrode includes a plurality of pixel electrodes, a thin film transistor, an insulating layer that covers the scanning line and the signal line, an area between adjacent pixel electrodes with the scanning line interposed therebetween, and an adjacent pixel electrode with the signal line interposed therebetween. A plurality of edges are formed in a region corresponding to the pixel electrode, and are arranged in parallel with each other at intervals, and between the edge and the pixel electrode, The liquid crystal display element according to claim 1, wherein an electric field for controlling the orientation direction of the liquid crystal molecules is generated.   The common electrode is formed in a row direction between an adjacent pixel and a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval corresponding to each pixel are formed on an insulating film of one substrate. The liquid crystal display element according to claim 6, further comprising a metal conductive film formed along one of a scanning line extending in a row and a signal line extending in a column direction.   The common electrode is formed in a row direction between an adjacent pixel and a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval corresponding to each pixel are formed on an insulating film of one substrate. And a signal line extending in the column direction and at least along the scan line and covering the scan line and the thin film transistor. 7. A liquid crystal display device according to 6.   The common electrode is formed in a row direction between an adjacent pixel and a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval corresponding to each pixel are formed on an insulating film of one substrate. The metal conductive film formed on the scanning line extending in the column direction and the signal line extending in the column direction at least along the scanning line and covering the scanning line and excluding the region corresponding to the thin film transistor The liquid crystal display element according to claim 6, comprising:   The liquid crystal display element according to claim 9, further comprising a light shielding film formed in a region corresponding to a thin film transistor formed on the inner surface of the other substrate of the pair of substrates. .   The common electrode is formed in a row direction between an adjacent pixel and a transparent conductive film in which a plurality of edges aligned in parallel with each other at an interval corresponding to each pixel are formed on an insulating film of one substrate. The liquid crystal display element according to claim 6, comprising: a metal conductive film formed along both a scanning line extending in a row and a signal line extending in a column direction.   The common electrode is formed on substantially the entire surface of an insulating layer covering a plurality of pixel electrodes, thin film transistors, scanning lines, and signal lines, and the liquid crystal molecules are disposed between the pixel electrodes in a region corresponding to the pixel electrodes. The liquid crystal display element according to claim 1, further comprising: slits for forming a plurality of edges arranged parallel to each other at intervals to generate an electric field for controlling the orientation direction of the liquid crystal.   The slit formed in the common electrode forms an edge that intersects obliquely other than perpendicular and parallel to the direction of the long axis of the liquid crystal molecules aligned by the alignment film formed on one substrate surface. The liquid crystal display element according to claim 12, wherein the liquid crystal display element is formed in a direction obliquely intersecting with a direction of alignment treatment of the alignment film.   The slit formed in the common electrode is formed in a bent shape so as to form an edge that intersects obliquely other than perpendicular and parallel to the alignment treatment direction of the alignment film formed on one substrate surface. The liquid crystal display element according to claim 12, wherein the liquid crystal display element is a liquid crystal display element.   The pixel electrode formed on the one substrate has a shape corresponding to a slit formed in the common electrode in a region corresponding to the pixel, and a transparent conductive film having an opening in a region overlapping the slit of the common electrode. The liquid crystal display element according to claim 12, comprising a film.   2. The liquid crystal display element according to claim 1, wherein the pixel electrode formed on the one substrate is made of one transparent conductive film having a substantially rectangular shape having an area corresponding to the pixel. A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer sealed in a gap between the pair of substrates, wherein the liquid crystal molecules are aligned substantially parallel to the substrate surface with their molecular long axes aligned in one predetermined direction;
Thin film transistors that are arranged in a row direction and a column direction on the inner surface of one of the pair of substrates facing the other substrate, and to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
A plurality of scanning lines arranged on the inner surface of the one substrate between the row of pixel electrodes along the row direction and supplying scanning signals to the thin film transistors in each row, and columns of the pixel electrodes In between, a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
A plurality of inner surfaces of the one substrate are formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and are arranged in parallel to each other with an interval in a region corresponding to each pixel. Of the transparent conductive film in which the edge is formed, the scanning line extending in the row direction between adjacent pixels, and the signal line extending in the column direction, at least along the scanning line, and the scanning line and the thin film transistor A common electrode that generates an electric field for controlling the orientation direction of the liquid crystal molecules in a plane substantially parallel to the substrate surface between the pixel electrode and the metal conductive film formed to cover the pixel electrode;
A liquid crystal display element comprising:   The common electrode is formed on substantially the entire surface of an insulating layer covering a plurality of pixel electrodes, thin film transistors, scanning lines, and signal lines, and the liquid crystal molecules are disposed between the pixel electrodes in a region corresponding to the pixel electrodes. Are arranged in parallel to each other at an interval to generate an electric field for controlling the orientation direction of the substrate, and intersect at an angle other than perpendicular and parallel to the direction of the alignment treatment of the alignment film formed on one substrate surface <The liquid crystal display element of Claim 17 provided with the slit which forms the some edge part bent in the shape.   2. The liquid crystal display element according to claim 1, wherein the pixel electrode formed on the one substrate is made of one transparent conductive film having a substantially rectangular shape having an area corresponding to the pixel. A pair of substrates disposed opposite each other with a predetermined gap;
A liquid crystal layer enclosed in a gap between the pair of substrates and aligned in parallel with the substrate surface with the molecular long axes of the liquid crystal molecules aligned in one predetermined direction;
Thin film transistors that are arranged in a row direction and a column direction on the inner surface of one of the pair of substrates facing the other substrate, and to which display signals corresponding to display data are respectively supplied;
A pixel electrode formed on the inner surface of the one substrate connected to the thin film transistor, and the display signal is supplied from the thin film transistor;
A plurality of scanning lines arranged on the inner surface of the one substrate between the row of pixel electrodes along the row direction and supplying scanning signals to the thin film transistors in each row, and columns of the pixel electrodes In between, a plurality of signal lines that are arranged along the column direction and supply display signals to the thin film transistors in each column,
A plurality of inner surfaces of the one substrate are formed on the liquid crystal layer side of the pixel electrode so as to correspond to the pixel electrode through an insulating film, and are arranged in parallel to each other with an interval in a region corresponding to each pixel. The scan line and the signal line are covered along both the transparent conductive film in which the edge portion is formed, the scan line extending in the row direction between adjacent pixels, and the signal line extending in the column direction. And a metal conductive film formed in a portion excluding a region corresponding to the thin film transistor, and the orientation direction of the liquid crystal molecules is controlled in a plane substantially parallel to the substrate surface between the pixel electrode and the pixel electrode. A common electrode for generating an electric field,
A light shielding film formed in a region corresponding to a thin film transistor formed on the one substrate on the inner surface of the other substrate of the pair of substrates;
A liquid crystal display element comprising:

Images