JP3300336B2 - Liquid crystal display - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a liquid crystal display device of a lateral electric field method which decreases such a failure called as a weight mark originating from a display failure caused by a weight added on the display face and remaining visible for a long time even after the weight is removed, which shows good display characteristics with a wide viewing angle and can be easily manufactured at low cost. SOLUTION: The top ends of a pixel electrode 10 and a counter electrode 11 are provided with conductors 10a, 11a having such a pattern that at least one line of each conductor is tilted in the opposite direction to the alignment direction of the liquid crystal to a source line 12. The angle &theta;e of the conductors 10a, 11a to the source line 12 is controlled to the range of 1 deg.<&theta;e<90 deg.. Thereby, the direction of the electric field in the top ends of the pixel electrode 10 and the counter electrode 11 can be controlled to the direction where the liquid crystal has to be rotated, and the liquid crystal rotated in the opposite direction by the weight can be rapidly returned to the right rotation direction. Thus, the weight mark can be rapidly decreased and the display quality is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lateral electric field type active matrix type liquid crystal display device.
The present invention relates to a reduction in a defect called a weight mark which is visually recognized for a long time even after unloading of a display defect caused by a load on a display surface.

[0002]

2. Description of the Related Art In recent years, as disclosed in, for example, Japanese Patent Application Laid-Open No. 8-254712, in an active matrix type liquid crystal display device, a horizontal direction of an electric field applied to a liquid crystal is set to a direction parallel to a substrate. The directional electric field method is mainly used as a technique for obtaining an ultra-wide viewing angle. It has been clarified that adopting this method almost eliminates the change in contrast and the inversion of the gradation level when the viewing angle direction is changed (Reference: M. Oh-e, et al., Asia Displa
y'95, pp.577-580). FIG. 10 is a plan view showing a pixel portion of a conventional general lateral electric field type liquid crystal display device. In the figure, reference numeral 2 denotes a plurality of gate signal lines as scanning signal lines formed on an insulating substrate, which cross each other with source lines 12 as a plurality of video signal lines. 4 is a storage capacitor common line, 6 is a semiconductor film of a thin film transistor provided at each intersection of the gate line 2 and the source line 12, 9 is a storage capacitor electrode provided on the storage capacitor common line 4 via a gate insulating film, Reference numeral 10 denotes a comb-shaped pixel electrode composed of a plurality of electrodes connected to the thin film transistor and provided in parallel with the source wiring 12. Reference numeral 11 denotes a plurality of electrodes arranged in parallel and alternately with the plurality of electrodes of the pixel electrode 10. A comb-shaped counter electrode 14 is a drain electrode, and 16 is a contact hole.

[0003]

In such a lateral electric field type liquid crystal display device, the weight on the display surface causes
There is a problem that a display defect due to an abnormal liquid crystal alignment occurs around the weighted portion, and a phenomenon called a weight mark, in which the display defect is visually recognized for a long time even after unloading, occurs. The generation principle of the weighted trace will be described with reference to FIGS. 11 shows a state where no voltage is applied to the liquid crystal, FIG. 12 shows a state where voltage is applied to the liquid crystal, FIG. 13 shows a state where voltage is applied to the liquid crystal and weight is applied, and FIG. 14 shows a state where voltage is applied to the liquid crystal. In addition, it shows an arrangement of liquid crystal molecules in a state after degraving. In the state where no voltage is applied to the liquid crystal, the liquid crystal is aligned in the alignment direction determined by a liquid crystal alignment method such as rubbing as shown in FIG.
When a voltage is applied to the liquid crystal, the liquid crystal is arranged in the direction of the electric field. At this time, the direction of the electric field changes at the end of the pixel electrode 10 and the end of the counter electrode 11 as shown in FIG. Occurs. Under a voltage applied state and a constant pressure state, the poorly-aligned region occurs only near the electrode end, and is hardly visually recognized. However, when a load is applied to the display surface in the voltage application state, a phenomenon occurs in which the misalignment region 22 at the end of the pixel electrode 10 and the misalignment region 22 at the end of the counter electrode 11 spread as shown in FIG. 22
Is visually recognized. Most of the poorly-aligned regions 22 return to the initial state after the removal, but some remain for a long time and are visually recognized as shown in FIG.

FIGS. 11 to 14 show the case where the orientation direction of the liquid crystal is counterclockwise with respect to the source wiring 12, but the case where the orientation direction of the liquid crystal is clockwise with respect to the source wiring 12 is shown in FIG. 17 to FIG. 15 shows a state in which a voltage is applied to the liquid crystal, FIG. 16 shows a state in which a voltage is applied to the liquid crystal and a load is applied, and FIG. 17 shows an arrangement of the liquid crystal molecules in a state in which a voltage is applied to the liquid crystal and after the load is removed. Is shown. As described above, when the alignment direction of the liquid crystal is clockwise with respect to the source wiring 12, the location of the abnormal alignment region 22 is line-symmetric with respect to the source wiring 12 when the alignment direction is counterclockwise. As a method of reducing the above-mentioned weight marks, a method of increasing a rubbing angle is generally known. However, in the lateral electric field method, the viewing angle direction in which the contrast is high is the rubbing angle direction, that is, the orientation direction of the liquid crystal and the direction perpendicular to the rubbing angle direction. Therefore, when the rubbing angle is increased, the viewing angle characteristics of the display device in the vertical and horizontal directions are reduced. There is a problem. In addition, since the driving voltage increases as the rubbing angle increases, there is a problem that low-voltage driving becomes difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and it is possible to reduce a defect called a weight mark which is visually recognized for a long time after a load is removed from a display defect caused by a load on a display surface. It is an object of the present invention to obtain a low-cost lateral electric field type liquid crystal display device having a wide viewing angle, good display characteristics, and easy manufacture.

[0006]

A liquid crystal display device according to the present invention comprises a pair of substrates opposed to each other at a fixed distance, a liquid crystal layer sandwiched between these substrates, and a liquid crystal display formed on one of the substrates. A plurality of scanning signal lines and a plurality of video signal lines crossing each other, a thin film transistor provided at each intersection of the scanning signal line and the video signal line, and a thin film transistor connected to the thin film transistor and provided in parallel with the video signal line. A comb-shaped pixel electrode composed of a plurality of electrodes; and a comb-shaped counter electrode composed of a plurality of electrodes arranged in parallel and alternately with the plurality of electrodes of the pixel electrode, and a voltage is applied between the pixel electrode and the counter electrode. In a liquid crystal display device that applies an electric field substantially parallel to the substrate surface to the liquid crystal layer, at least one end of the pixel electrode and the counter electrode has at least one side interposed between the pixel electrode and the counter electrode and the insulating film. It is provided with a conductor pattern which is inclined in a direction opposite to the orientation direction of the liquid crystal with respect to the image signal line.

The conductor is electrically connected to a pixel electrode or a counter electrode through a contact hole.

Further, the conductor is made of a light-transmitting conductive film.

[0009]

Embodiment 1 Embodiments of the present invention will be described below with reference to the drawings. 1 is a plan view showing a pixel portion of a lateral electric field type liquid crystal display device according to Embodiment 1 of the present invention, and FIG.
FIG. 7 is a cross-sectional view illustrating a method for manufacturing the liquid crystal display device shown in FIG. In the figure, reference numeral 1 denotes an insulating substrate such as a glass substrate, and 2 denotes a plurality of scanning signal lines formed of a metal such as Cr formed on the insulating substrate 1 and a plurality of video signal lines. It intersects with the source wiring 12 mutually. Reference numeral 3 denotes a gate electrode made of a metal such as Cr, 4 denotes a storage capacitor common wiring made of a metal such as Cr, and 5 denotes a gate insulating film made of silicon nitride or the like formed so as to cover the gate wiring 2 and the storage capacitor common wiring 4. And 6, a semiconductor film made of non-doped amorphous silicon or the like constituting a thin film transistor provided at each intersection of the gate wiring 2 and the source wiring 12;
A contact film in which a semiconductor film such as Si is doped with an impurity such as P and has a region 8 in which an upper portion of an active region which is a part of the film is removed by etching or the like; A storage capacitor electrode 10 provided on the gate electrode 4 via a gate insulating film 5 is connected to a thin film transistor, and is a comb-shaped pixel electrode composed of a plurality of electrodes provided in parallel with the source wiring 12. Or I
It is formed of a transparent conductive film such as TO (Indium Tin oxide). Numeral 11 denotes a comb-like counter electrode composed of a plurality of electrodes arranged in parallel and alternately with a plurality of electrodes of the pixel electrode 10, and 10a and 11a denote the pixel electrode 10 and the counter electrode 11.
The bent portions 13 provided in the end portions of the source wiring 12 and bent in the direction opposite to the direction of alignment of the liquid crystal with respect to the source wiring 12 are formed so as to be in contact with the contact film 7 and formed on the source wiring 12.
A drain electrode formed so as to be in contact with the contact film 7, an interlayer insulating film formed of a Si nitride film or the like so as to cover the entire device,
6 is a contact hole; 17 is a first wiring formed on the insulating substrate 1 using the same material as the gate wiring 2;
Is a second wiring formed on the insulating substrate 1 using the same material as the source wiring 12, and 19 is a pixel electrode 1 connecting the first wiring 17 and the second wiring 18 via a contact hole.
A third wiring 21 made of the same material as 0 indicates a converter.

In the liquid crystal display device according to the present embodiment, a liquid crystal layer is sandwiched between a pair of substrates opposed to each other at a fixed distance, and a plurality of substrates provided on one of the substrates in parallel with the source wiring 12. A pixel electrode 10 composed of a plurality of electrodes, and a comb-shaped counter electrode 11 composed of a plurality of electrodes arranged in parallel and alternately with the plurality of electrodes of the pixel electrode 10; Is a lateral electric field type liquid crystal display device in which a voltage is applied to the liquid crystal layer by applying a voltage to the liquid crystal layer, and at least one end of the pixel electrode 10 and the counter electrode 11 (in this embodiment, Tip)
Further, bent portions 10a and 11a which are bent in a direction opposite to the orientation direction of the liquid crystal with respect to the source line 12 are provided.

A process flow of the liquid crystal display device according to the present embodiment will be described with reference to FIG. First, FIG.
As shown in FIG. 1, Cr, Al, Ti, T
a, Mo, W, Ni, Cu, Au, Ag or the like, an alloy containing them as a main component, a light-transmitting conductive film such as ITO, or a multilayer film thereof is formed by a sputtering method or a vapor deposition method. The film is formed, and the gate wiring 2, the gate electrode 3, the storage capacitor common wiring 4, the first wiring 17 in the conversion unit 21, and the like are formed by photolithography and processing. Next, as shown in FIG. 2B, a gate insulating film 5 made of silicon nitride or the like is formed, and a semiconductor film 6 made of amorphous Si, polycrystalline poly-Si or the like, and an n-type TFT Is n + amorphous Si, n + polycrystalline poly-S doped with impurities such as P at a high concentration.
A contact film 7 made of i or the like is continuously formed by, for example, plasma CVD, normal pressure CVD, or low pressure CVD. Next, the contact film 7 and the semiconductor film 6 are processed into an island shape.

Next, as shown in FIG.
l, Ti, Ta, Mo, W, Ni, Cu, Au, Ag, or alloys containing these as main components, or a light-transmitting conductive film such as ITO, or a multilayer film thereof, or the like by sputtering or vapor deposition. After film formation by the method, the source wiring 12, the source electrode 13, the drain electrode 14, the storage capacitor electrode 9, the second wiring 18, and the like are formed by photolithography and fine processing technology. further,
The contact film 7 is etched using the source electrode 13 and the drain electrode 14 or the photoresist on which they are formed as a mask, and is removed from the channel region. Next, as shown in FIG. 2D, silicon nitride, silicon oxide,
An interlayer insulating film 15 made of an inorganic insulating film or an organic resin is formed, and a contact hole 16 is formed by photolithography and subsequent etching. Finally, as shown in FIG. 2 (e), Cr, Al, Ti, Ta, Mo, W, Ni, C
After forming a transparent conductive film such as u, Au, Ag or the like, an alloy containing them as a main component, or ITO, or a multilayer film thereof, the pixel electrode 10 is formed by patterning.
The counter electrode 11 and the third wiring 19 are formed. At this time,
As shown in FIG. 1, bent portions 10 a and 11 a that are bent in a direction opposite to a direction in which the liquid crystal is aligned with respect to the source wiring 12 are provided at the tip portions of the pixel electrode 10 and the counter electrode 11. The angle θe of the bent portions 10a and 11a is 0 ° <θe <
Although it is possible to obtain the effect at 90 °, 5 ° <θe <
If the angle is designed at 45 °, even if the electrode tip shape changes due to manufacturing variations or the like, 0 ° <θe <90 ° or a short circuit with the other electrode can be suppressed. In FIG. 1, .theta.1 is the angle between the arrangement direction of the liquid crystal molecules and the source wiring 12.

Through the above steps, a TFT substrate constituting a liquid crystal display device of a lateral electric field type in this embodiment can be manufactured. Further, a liquid crystal is sandwiched between the TFT substrate and the opposing substrate, and joined with a sealant. At this time, the liquid crystal molecules are aligned at an angle of θ1 by a method such as rubbing or optical alignment. Note that any known method may be used to align the liquid crystal. Further, a liquid crystal display device is manufactured by connecting a gate line driving circuit, a source line driving circuit, and a power supply for a common storage capacitor line to the gate line 2, the source line 12, and the common storage capacitor line 4, respectively. In the present embodiment, the bent portions 10 a and 11 bent in the opposite direction to the orientation direction of the liquid crystal with respect to the source line 12 are provided at both ends of the pixel electrode 10 and the counter electrode 11.
However, since the disappearance of the abnormal alignment region of the liquid crystal due to the weight trace occurs from the bent portion, providing the bent portions at both ends of the tip of the pixel electrode 10 and the tip of the counter electrode 11 can shorten the disappearing time. It is. On the other hand, in the bent portion, the direction of the electric field is different from that of the parallel portion, so that the transmittance may decrease at the time of full white display. In this case, it can be provided at either one end of the pixel electrode 10 and the counter electrode 11. FIG.
As shown in FIG. 1, the orientation direction θl ′ of the liquid crystal molecules is θ
When the angle l is opposite to the source wiring 12, the angle θe ′ of the bent portions 10a and 11a is also set to the opposite direction to θe, and 1 ° <θe ′ <90 °. Further, as shown in FIG. 4, the opposing electrode 11 is provided with a protrusion 11b protruding at the same angle in the same direction as the bend 10a at a position adjacent to the bend 10a provided at the tip of the pixel electrode 10. Is also good. Similarly, the pixel electrode 10 may be provided with a protruding portion 10b protruding at the same angle in the same direction as the bent portion 11a at a position adjacent to the bent portion 11a provided at the tip of the counter electrode 11.

According to the present embodiment, the direction of the electric field at the tips of the pixel electrode 10 and the counter electrode 11 can be controlled in the direction in which the liquid crystal should rotate, so that the liquid crystal that has been rotated in the reverse rotation direction by the load can be quickly changed. It is possible to return to the normal rotation direction. Therefore, a display defect caused by a load on the display surface, which is a load mark, which is visually recognized for a long time even after unloading, can be promptly reduced, and the display quality is improved. In addition, since it is not necessary to provide a protective plate for preventing the load on the display surface, the manufacturing cost of the liquid crystal display device can be reduced. In this embodiment, the structure in which the pixel electrode 10 and the counter electrode 11 are both formed on the uppermost layer has been described. However, an insulating film such as SiN or SiO 2 is formed on the pixel electrode 10 and the counter electrode 11. The same effect can be obtained in the case where the pixel electrode 10 and the counter electrode 11 are provided in different layers via an insulating film.

Embodiment 2 FIG. 5 is a plan view showing a pixel portion of the liquid crystal display device according to Embodiment 2 of the present invention. In the drawings, the same or corresponding parts are denoted by the same reference numerals,
Description is omitted. In the present embodiment, the first embodiment
Similarly to the above, at the tip of the pixel electrode 10 and the counter electrode 11,
Bent portions 10a and 11a which are bent in a direction opposite to the direction of alignment of the liquid crystal with respect to the source line 12 are provided. Further, the concave portions of the comb-like electrodes of the pixel electrode 10 and the counter electrode 11 The pixel electrode 10 is bent in parallel with the bent portions 11 a and 10 a provided at the tip of the pixel electrode 10. That is, the angle θe2 of the concave portion also
It is possible to obtain the effect at 0 ° <θe2 <90 ° as in the case of the angle θe of a, 11a, but if the angle is designed at 5 ° <θe2 <45 °, the shape of the electrode tip changes due to manufacturing variations. Even so, it is possible to suppress 0 ° <θe 2 <90 ° or to prevent short-circuit with the other electrode. In FIG. 5, the bent portion 10a at the tip of the pixel electrode 10 and the concave portion of the opposing electrode 11 opposed thereto, the bent portion 11a at the tip of the opposing electrode 11 and the concave portion of the pixel electrode 10 opposed thereto are all 1１０ <θe.
<90 °, 1 ° <θe2 <90 °. In the figure, .theta.1 is the angle between the arrangement direction of the liquid crystal molecules and the source wiring 12. If the direction of θ1 is opposite to the direction shown in FIG. 5 with respect to the direction of the source wiring 12, the directions of θe and θe2 may be reversed. Other configurations and a manufacturing method of the liquid crystal display device according to the present embodiment are the same as those of the above-described first embodiment, and thus description thereof will be omitted. Also in the present embodiment, the first embodiment
Similarly to the above, effects such as improvement of display quality and reduction of manufacturing cost can be obtained.

Embodiment 3 FIG. 6 is a plan view illustrating a pixel portion of a liquid crystal display device according to Embodiment 3 of the present invention. In the figure, reference numeral 20 denotes a pixel electrode 10 and a counter electrode 11.
Is a conductor made of a metal such as Cr or a conductive film having a light-transmitting property such as ITO provided at the front end portion with an insulating film interposed therebetween. In the drawings, the same or corresponding parts are denoted by the same reference numerals,
Description is omitted. The process flow of the liquid crystal display device according to the present embodiment is the same as that of the above-described first embodiment, and a description thereof will be omitted (see FIG. 2). However, conductor 20
Can be provided via the pixel electrode 10 and the counter electrode 11 with an insulating film interposed therebetween.
2 and formed at the same time. Alternatively, when the material of the gate wiring 2 or the source wiring 12 is a non-transparent material, the conductor 20 is connected to the IT before and after the formation of the gate wiring 2 or the source wiring 12.
The light-transmitting conductive film such as O may be used. At this time, the conductor 20 and the pixel electrode 10 (or the counter electrode 1
It is possible to obtain the effect when the angle θe 3 formed by 1) is 0 ° <θe 3 <90 °, but if the angle θe 3 is designed at 5 ° <θe 3 <45 °, the shape of the tip of the electrode may vary due to manufacturing variations. Even if it changes, it is possible to suppress 0 ° <θe3 <90 ° or to suppress short-circuit with the other electrode.

The shape of the conductor 20 may be a triangle as shown in FIG. That is, the conductor 20 may have a pattern shape in which at least one side is inclined in a direction opposite to the direction of alignment of the liquid crystal with respect to the source wiring 12. When the liquid crystal orientation is opposite to the direction of the source wiring 12 in FIG. 6 or FIG.
° <θe3 <90 °. Also in this embodiment, similar to the first and second embodiments, effects such as improvement of display quality and reduction of manufacturing cost can be obtained. When the conductor 20 is formed of a light-transmitting conductive film such as ITO, the aperture ratio does not decrease.

Embodiment 4 FIG. 8 is a plan view showing a pixel portion of a liquid crystal display device according to Embodiment 4 of the present invention. In the figure, 16a is a contact hole for electrically connecting the conductor 20 provided at the tip of the pixel electrode 10 and the pixel electrode 10, and 16b is electrically connecting the conductor 20 provided at the tip of the counter electrode 11 and the counter electrode 11. It is a contact hall to do. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated. In the present embodiment, the conductor 20 described in the third embodiment is replaced with the contact hole 16a,
16b and the tip of the pixel electrode 10 and the counter electrode 11
It is designed to be connected to the tip of the. Except for this point, the configuration and process flow are the same as those of the third embodiment, and thus the description is omitted. Also in the present embodiment,
As in the first to third embodiments, effects such as improvement in display quality and reduction in manufacturing cost can be obtained. When the conductor 20 is formed of a light-transmitting conductive film such as ITO, the aperture ratio does not decrease.

Embodiment 5 FIG. 9 is a plan view showing a pixel portion of a liquid crystal display device according to Embodiment 5 of the present invention. In the figure, reference numeral 16c denotes a contact hole for electrically connecting the conductor 20 provided in the recess of the counter electrode 11 and the counter electrode 11, and 16d denotes an electrical connection between the conductor 20 provided in the recess of the pixel electrode 10 and the counter electrode 10. This is a contact hole connected to. In the drawings, the same or corresponding parts have the same reference characters allotted, and description thereof will not be repeated. In the present embodiment, the conductor 20 shown in the third embodiment is replaced with the contact hole 1.
This is connected to the counter electrode 11 and the recess of the pixel electrode 10 via 6c and 16d. Except for this point, the configuration and process flow are the same as those of the third embodiment, and thus the description is omitted. Also in this embodiment, similar to the first to fourth embodiments, effects such as improvement of display quality and reduction of manufacturing cost can be obtained. When the conductor 20 is formed of a light-transmitting conductive film such as ITO, the aperture ratio does not decrease.

The effects described in the first to fifth embodiments can be obtained from a TFT structure, a driving method, the size of the display device, the number of pixels, if the liquid crystal display device is of a lateral electric field type.
Similar effects can be obtained regardless of the type of liquid crystal.

[0021]

As described above, according to the present invention, at least one end of the pixel electrode and the counter electrode is provided through the insulating film with the pixel electrode and the counter electrode, and at least one side is provided with the video signal. Since the pattern-shaped conductor is inclined in the direction opposite to the direction of liquid crystal alignment with respect to the line, the direction of the electric field at the tip of the pixel electrode or the counter electrode can be controlled to the direction in which the liquid crystal should rotate, and the weight is applied. As a result, it is possible to quickly return the liquid crystal that has been rotated in the reverse rotation direction to the normal rotation direction, so that the display defect caused by the load on the display surface can be quickly eliminated even after the load is removed. The display quality can be improved. Further, since there is no need to provide a protective plate for preventing a load on the display surface, there is an effect that the manufacturing cost of the liquid crystal display device can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view illustrating a pixel portion of a liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view illustrating the method for manufacturing the liquid crystal display device in Embodiment 1 of the present invention.

FIG. 3 is a plan view showing a pixel portion of another liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 4 is a plan view showing a pixel portion of another liquid crystal display device according to Embodiment 1 of the present invention.

FIG. 5 is a plan view illustrating a pixel portion of a liquid crystal display device according to Embodiment 2 of the present invention.

FIG. 6 is a plan view illustrating a pixel portion of a liquid crystal display device according to Embodiment 3 of the present invention.

FIG. 7 is a plan view illustrating a pixel portion of another liquid crystal display device according to Embodiment 3 of the present invention.

FIG. 8 is a plan view illustrating a pixel portion of a liquid crystal display device according to Embodiment 4 of the present invention.

FIG. 9 is a plan view illustrating a pixel portion of a liquid crystal display device in Embodiment 5 of the present invention.

FIG. 10 is a plan view showing a pixel portion of a conventional general lateral electric field type liquid crystal display device.

FIG. 11 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of the conventional liquid crystal display device.

FIG. 12 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of a conventional liquid crystal display device.

FIG. 13 is a view for explaining the principle of generation of a weight mark, which is a problem of a conventional liquid crystal display device.

FIG. 14 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of a conventional liquid crystal display device.

FIG. 15 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of a conventional liquid crystal display device.

FIG. 16 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of a conventional liquid crystal display device.

FIG. 17 is a diagram illustrating the principle of generation of a weighted trace, which is a problem of a conventional liquid crystal display device.

[Explanation of symbols]

1 Insulating substrate, 2 Gate wiring, 3 Gate electrode, 4
Storage capacitance common wiring, 5 gate insulating film, 6 semiconductor film, 7 contact film, 9 storage capacitance electrode, 10 pixel electrode, 10a bent portion, 10b protrusion, 11 counter electrode, 11a bent portion, 11b protrusion, 12 source wiring , 13 source electrode, 14 drain electrode, 15 interlayer insulating film, 16, 16a, 16b, 16c, 16d contact hole, 17 first wiring, 18 second wiring, 19 third wiring, 20 conductor, 21 converter , 2
2 Alignment abnormal region.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-10-90682 (JP, A) JP-A-7-191336 (JP, A) JP-A-2000-66222 (JP, A) JP-A-2000-122080 ( JP, A) JP-A-2000-56320 (JP, A) JP-A-5-241159 (JP, A) JP-A-9-171175 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB Name) G02F 1/1362 G02F 1/1337 G02F 1/1343 G09F 9/00-9/46

Claims (3)

(57) [Claims] 1. A pair of substrates disposed opposite each other at a fixed distance, a liquid crystal layer sandwiched between the substrates, and a plurality of scanning signal lines and a plurality of scanning signal lines formed on the one substrate and intersecting each other. A plurality of video signal lines, thin film transistors provided at intersections of the scanning signal lines and the video signal lines, and a plurality of electrodes connected to the thin film transistors and provided in parallel with the video signal lines. A pixel electrode,
An electric field substantially parallel to the substrate surface by applying a voltage between the pixel electrode and the opposing electrode, comprising a comb-shaped opposing electrode comprising a plurality of electrodes arranged in parallel and alternately with the plurality of electrodes of the pixel electrode; Is applied to the liquid crystal layer, at least one end of the pixel electrode and the counter electrode is provided via the insulating film with the pixel electrode and the counter electrode, and at least one side of the video signal line A liquid crystal display device comprising: a conductor having a pattern shape that is inclined in a direction opposite to the alignment direction of the liquid crystal with respect to the liquid crystal display device. 2. The liquid crystal display device according to claim 1, wherein the conductor is electrically connected to the pixel electrode or the counter electrode via a contact hole. 3. The liquid crystal display device according to claim 1, wherein the conductor is made of a light-transmitting conductive film.