JP3513826B2 - Liquid crystal display device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an active matrix type liquid crystal display device.

[0002]

2. Description of the Related Art An active matrix type liquid crystal display element includes a plurality of pixel electrodes arranged in a row direction and a column direction, a plurality of switching elements respectively connected to the pixel electrodes, and a plurality of pixel electrodes arranged along each pixel electrode row. A plurality of scanning lines which are wired together to supply the control signal to the switching elements in that row, and a signal line which is wired along each pixel electrode column and supplies a data signal to the switching elements in that column Liquid crystal is provided between the one substrate having the alignment film formed thereon and the other substrate having the alignment film formed thereon and the counter electrode facing each pixel electrode of the one substrate. In a liquid crystal display element for displaying a multicolor image, one of the substrates (usually the substrate on which the counter electrode is provided) is made to correspond to each pixel electrode. , Green, is provided with a blue color filter.

3 to 6 show a conventional active matrix type liquid crystal display device for displaying a multicolor image, FIG. 3 is a front view of a part of the liquid crystal display device, and FIG. 4 is FIG.
4 is an enlarged sectional view taken along line IV-IV of FIG. 5, FIG. 5 is an enlarged sectional view taken along line VV of FIG. 3, and FIG. 6 is an enlarged front view of one pixel portion. The liquid crystal display element displays red, green and blue pixels in a mosaic arrangement pattern.

The pair of substrates 1 and 2 of this liquid crystal display element are
A plurality of transparent pixel electrodes 3 are arranged in the row direction (horizontal axis O of the screen O on a transparent substrate made of glass or the like, and on the inner surface of one substrate, for example, a back substrate (hereinafter referred to as a back substrate) 1.
Are arranged in a row direction and a column direction (direction intersecting the horizontal axis O).

In FIG. 3, the (R) electrode displays a red pixel, the (G) electrode displays a green pixel, and the (B) electrode displays a blue pixel. These pixel electrodes 3 are arranged alternately in the row direction, and the pixel electrodes for displaying pixels of the same color are arranged in the column direction on the left and right by about 1.5 pitches (in the row direction). ) Are arranged alternately in a zigzag pattern.

On the inner surface of the back substrate 1, a plurality of switching elements 4 each composed of a thin film transistor having an inverted stagger structure are provided corresponding to the respective pixel electrodes 3, and the switching elements 4 of each pixel electrode row are provided.
Further, a plurality of scanning lines 10 for supplying a signal (gate signal) for controlling the ON / OFF thereof and a signal line 11 for supplying a data signal to the switching element 4 of each pixel electrode column are provided.

The switching element (thin film transistor) 4 has a gate electrode 5 formed on the substrate 1, a gate insulating film 6 covering the gate electrode 5, and a gate insulating film 6 on the gate insulating film 6 facing the gate electrode. The i-type semiconductor film 7 is formed, and the source electrode 8 and the drain electrode 9 are formed on the i-type semiconductor film 7 via an n-type semiconductor film (not shown).

The scanning lines 10 are arranged on the substrate 1 along the respective pixel electrode rows, and the gate electrodes 5 of the switching elements 4 in the respective rows are arranged along the scanning lines 10.
Is formed integrally with.

The gate insulating film (transparent film) 6 of the switching element 4 is formed on almost the entire surface of the substrate 1 so as to cover the scanning lines 10 and the pixel electrode 3 is formed on the gate insulating film 6. It is formed and is connected to the source electrode 8 of the switching element 4 in the vicinity of one corner thereof.

The signal line 11 is laid on the gate insulating film 6 along each pixel electrode column (a zigzag pixel electrode column) for displaying pixels of the same color. It is connected to the drain electrode 9 of each switching element 4.

The wiring pattern of the signal line 11 will be described with reference to a signal line along one pixel electrode column in which the pixel electrodes 3 for displaying pixels of the same color are arranged in zigzag. 3 are arranged in a meandering manner along the right side edge of the pixel electrode 3 displaced to the left and the left side edge of the pixel electrode 3 displaced to the right, and the right side edge and the left side edge of the pixel electrode 3 in each row are arranged. The horizontal wiring portion that connects the vertical wiring portions along the
It is formed so as to pass above 0 in parallel with the scanning line 10.

The signal lines 11 are wired in this manner in order to shorten the length of the horizontal wiring portion passing between the adjacent pixel electrode rows to simplify the wiring of the signal lines 11. However, when the signal line 11 is wired in this way, the position of the signal line 11 with respect to the switching element 4 corresponding to the pixel electrode 3 displaced to the left and the switching element 4 corresponding to the pixel electrode 3 displaced to the right. Since the position of the signal line 11 with respect to is opposite to each other, the switching element 4 corresponding to the pixel electrode 3 displaced to the left and the switching element 4 corresponding to the pixel electrode 3 displaced to the right. The source and drain electrodes 8 and 9 are formed so that the positional relationship between them is opposite to each other.

The signal line 11 and each switching element 4
Is covered with a transparent protective insulating film 12 (see FIGS. 4 and 5), and the protective insulating film 12 is slightly wrapped around the periphery of each pixel electrode 3 between the rows and columns of each pixel electrode. Is formed.

Further, on the back substrate 1, an auxiliary capacitance electrode 13 is formed corresponding to each pixel electrode 3 to form an auxiliary capacitance (storage capacitor) Cs for holding the potential of the pixel electrode 3 in the non-selected period. Is provided.

The auxiliary capacitance electrode 13 is formed under the gate insulating film 6 of the switching element 4 so as to face the edge portions on both sides of each pixel electrode 3, and the auxiliary capacitance Cs is the auxiliary capacitance. The electrodes 13 and the pixel electrodes 3 and the gate insulating film 6 therebetween are formed.

The auxiliary capacitance electrode 13 is integrally formed with a reference potential line 14 wired on the substrate 1 along the side opposite to the scanning line wiring side of each pixel electrode row. The portion where the line 14 faces the pixel electrode 3 is also a part of the auxiliary capacitance Cs.

The auxiliary capacitance electrode 13 and the reference potential line 14, the gate electrode 5 of the switching element 4 and the scanning line 10 are formed by patterning the same metal film.

Further, as shown in FIGS. 4 and 5, on the inner surface of the back substrate 1 side, an alignment film 15 made of polyimide or the like is formed over the entire formation region of the pixel electrode 3 and the switching element 4. And the alignment film 15
Is subjected to orientation treatment by rubbing the film surface in a predetermined direction.

On the other hand, as shown in FIGS. 4 and 5, on the inner surface of the substrate 2 on the front surface side of the liquid crystal display element (hereinafter referred to as the front substrate), a light-shielding film having a lattice pattern for defining the size of the pixel A is formed. 16 are provided, and color filters 17 for red, green, and blue are provided so as to face the pixel electrodes 3 for displaying pixels of the respective colors, and all the pixel electrodes 3 are provided thereon. A transparent transparent counter electrode 18 in the form of a single film is provided.

The light-shielding film 16 is made of a metal film such as chromium or a resin film mixed with a black pigment, and each opening 16a thereof has a pixel electrode 3 as shown in FIGS. It is formed to be slightly smaller than the outer shape.

An alignment film 19 made of polyimide or the like is also formed on the inner surface of the front substrate 2 over the entire area where the pixel electrodes 3 and the switching elements 4 are formed. The alignment treatment is performed by rubbing the film surface in a predetermined direction.

The back side substrate 1 and the front side substrate 2 are
The liquid crystal display device is bonded via a frame-shaped sealing material (not shown) surrounding the display area of the liquid crystal display element, and the liquid crystal 20 is sealed in the area between the substrates 1 and 2 surrounded by the sealing material. . In addition, a polarizing plate 2 is provided on the outer surface of each of the substrates 1 and 2.
1, 22 are arranged.

This liquid crystal display device has a TN (twisted
(Nematic) type, the alignment films 15 and 19 provided on the substrates 1 and 2 are aligned in a direction substantially orthogonal to each other, and the molecules 20a (see FIGS. 4 and 5) of the liquid crystal 20 are The alignment direction in the vicinity of the substrates 1 and 2 is regulated by the alignment films 15 and 19, and the substrates 1 and 2 are twist-aligned at a twist angle of about 90 °.

In FIG. 3, the arrow a indicates the orientation of the alignment film 15 on the back substrate 1, and the arrow b indicates the alignment film 1 on the front substrate 2.
9 shows the orientation processing direction of No. 9. As shown in this figure, the alignment film 15 of the back substrate 1 is subjected to an alignment treatment in the direction of about 45 ° counterclockwise when viewed from the surface side of the liquid crystal display element with respect to the horizontal axis O of the screen, and the alignment film 15 of the front substrate 2 is obtained. No. 19 is subjected to an alignment treatment in a direction of about 45 ° clockwise when viewed from the surface side with respect to the horizontal axis O, and the liquid crystal molecule 20a has a twist direction shown in FIG.
As indicated by the dashed arrow T, the twist alignment is performed at a twist angle of approximately 90 ° counterclockwise when viewed from the front surface side of the liquid crystal display element from the rear substrate 1 to the front substrate 2.

Although FIG. 4 and FIG. 5 show only the liquid crystal molecules 20a near the back substrate 1, the liquid crystal molecules 20a are aligned on the alignment film 15,
Orientation processing direction (rubbing direction) with respect to the film surface of 19
The molecules are aligned along the alignment treatment directions a and b in a state in which the molecular ends on the sides a and b are pretilted so as to rise obliquely at an angle of several degrees (2 to 3 °).

The polarizing plates 21 and 22 are arranged such that their transmission axes are substantially parallel to each other or substantially orthogonal to each other. The transmission axes of these polarizing plates 21 and 22 are respectively polarized. Substrate 1 or 2 with adjacent plates
Is substantially parallel or substantially orthogonal to the alignment direction of the liquid crystal molecules 20a in the vicinity of.

The above liquid crystal display element supplies a signal of a reference potential to the counter electrode 18 so that each scanning line 10 has a potential which turns on the switching element 4 during the selection period of the pixel electrode row corresponding to the scanning line. The display drive is performed by supplying the control signal and the data signal having a waveform having a potential corresponding to the image data for each selection period of the pixel electrode row to each signal line 11.

[0028]

By the way, in the above-mentioned active matrix type liquid crystal display element, since the signal line 11 is wired along each pixel electrode column, the signal line 11 and the pixel electrode 3 adjacent to the signal line 11 are arranged. The electric field in the horizontal direction corresponding to the difference between the electric potential of the data signal supplied to the signal line 11 and the electric potential of the pixel electrode 3 (hereinafter, referred to as lateral electric field)
Occurs.

This lateral electric field is also generated between the scanning line 10 and the edge of the pixel electrode 3, but the scanning line 10 is oriented with the two insulating films of the gate insulating film 6 and the protective insulating film 12. Membrane 15
The electric field is extremely small because it is covered with.

In FIG. 4 and FIG. 5, E is the signal line 1
1 shows the horizontal electric field generated between the pixel electrode 3 and the edge portion of the pixel electrode 3, and the horizontal electric field E shown in FIG. 4 is the electric field between the vertical wiring portion of the signal line 11 and the pixel electrode 3. The transverse electric field E shown in
It is an electric field between the horizontal wiring portion of the signal line 11 and the pixel electrode 3.

On the other hand, as shown in FIGS. 4 and 5, the alignment film 15 of the back substrate 1 has a shape in which the corresponding portions above the signal line 11, the auxiliary capacitance Cs, etc. are raised, and therefore this alignment is performed. Alignment failure occurs due to insufficient rubbing at the stepped portion of the film 15.

If there is a defective alignment portion due to insufficient rubbing in the alignment film 15, the liquid crystal molecules 20a in the vicinity of the defective portion.
Liquid crystal molecules 20a in the vicinity thereof are randomly aligned.
The orientation state (twist orientation state) becomes unstable.

If there is a region in the liquid crystal layer in which the alignment state of the liquid crystal molecules 20a is unstable, the transverse electric field E
Liquid crystal molecules 20 in an unstable alignment state when
a is easily influenced by the lateral electric field E and is oriented in that direction,
That triggered the region near it, that is,
Liquid crystal molecules in a region where a lateral electric field E of a certain strength or more acts (molecules hatched in FIGS. 4 and 5)
18a is oriented along the direction of the transverse electric field E.

The direction of the lateral electric field E is opposite to each other on one side and the other side of the signal line 11 as a boundary, and therefore, between the signal line 11 and the pixel electrode 3 on one side thereof. The orientation direction of the liquid crystal molecules 20a by the lateral electric field E generated in
The orientation directions of the liquid crystal molecules 20a due to the horizontal electric field E generated between the signal line 11 and the pixel electrode 3 on the other side are opposite to each other.

On the other hand, the alignment state of the liquid crystal molecules 20a in the region not affected by the lateral electric field E (the alignment state when no voltage is applied between the pixel electrode 3 and the counter electrode 18) is shown. As seen, the liquid crystal molecules 20a in this region are oriented in the vicinity of the back substrate 1 with respect to the film surface of the alignment film 15 of the back substrate 1 in the alignment processing direction a (in FIG. 4, obliquely left toward the front side of the drawing). Direction, that is, in FIG. 5, diagonally leftward toward the back side of the drawing), the molecules are uniformly pre-tilted in such a manner that the molecular ends on the side facing the alignment treatment direction rise obliquely, and the front substrate 2 In the vicinity thereof, the alignment treatment direction b with respect to the film surface of the alignment film 19 of the front substrate 2 (in FIG. 4, a diagonal left direction toward the back side of the drawing, and in FIG. 5 a diagonal right direction toward the back side of the drawing). ) In the direction of this alignment treatment It is uniformly oriented in a state in which the sale of the side molecular end was pretilt to rise obliquely.

Therefore, the signal line 11 and the pixel electrode 3 on one side (on the right side of the signal line 11 in FIGS. 4 and 5) are arranged.
The orientation direction of the liquid crystal molecules 20a due to the transverse electric field E generated between the signal lines 11 and 19 is almost the same as the orientation direction of the orientation films 15 and 19, but the signal line 11 and the other side (signals in FIGS. 4 and 5). The alignment direction of the liquid crystal molecules 20a due to the transverse electric field E generated between the pixel electrode 3 on the left side of the line 11) and the pixel electrode 3 is almost opposite to the alignment direction of the alignment films 15 and 19. Disclination occurs in which the alignment state of the liquid crystal molecules 20a is reversed at the boundary between the influence range of the electric field E and the outside thereof.

A boundary at which the alignment state of the liquid crystal molecules 20a is reversed, that is, a boundary line D shown by a chain line in FIGS.
Is called a disclination line, and the disclination line D is a pixel electrode on the side of the alignment treatment direction a of the alignment film 15 of the back substrate 1 of the pixel electrodes 3 on both sides of the signal line 11. It occurs between the pixel electrode 3 on the left side of the signal line 11 and the signal line 11 in FIGS. 4 and 5.

Therefore, the conventional liquid crystal display element has a problem that a display defect along the disclination line D occurs in each pixel (a region corresponding to each opening 16a of the light shielding film 16).

This defect is caused by light leakage along the disclination line D in a negative display type liquid crystal display device in which a pair of polarizing plates 21 and 22 are arranged with their transmission axes substantially parallel to each other, and a pair of polarizing plates 21. , 22 are arranged along the disclination line D in the positive display type liquid crystal display element in which the transmission axes thereof are substantially orthogonal to each other, and in particular, in the negative display type liquid crystal display element, light leaks into each pixel. If so, the entire pixel appears thin and blurred due to the shine, and the above-mentioned disclination has a greater effect on the image quality.

According to the present invention, of the horizontal electric fields generated between the signal line and the pixel electrode, at least the horizontal electric field in the direction in which the disclination is generated is almost eliminated, so that there is no display defect due to the disclination and high quality. It is intended to provide a liquid crystal display device capable of displaying an image.

[0041]

According to the present invention, a plurality of pixel electrodes arranged in a row direction and a column direction, a plurality of switching elements respectively connected to these pixel electrodes, and a plurality of pixel electrode rows are provided. A plurality of scanning lines that are wired together to supply the control signal to the switching elements in that row, and a signal line that is wired along each pixel electrode column and that supplies a data signal to the switching elements in that column. A liquid crystal is interposed between one substrate having an alignment film formed thereon and the other substrate having an alignment film formed on the opposite electrode facing each pixel electrode of the one substrate. In the active matrix type liquid crystal display element, the arrangement provided on at least one of the pixel electrodes on both sides of the signal line on the inner surface of the one substrate. The field generation control film covering the area over the signal line from the upper edge of the alignment treatment direction downstream side of the pixel electrode of the film is provided, it is characterized in that the formation of the alignment layer thereon.

As described above, when the region is covered with the electric field generation suppressing film, at least liquid crystal molecules in the lateral electric field generated between the signal line and the edge of the pixel electrode are directed to the alignment direction of the alignment film. Thus, the electric field in the direction of almost the opposite direction, that is, the transverse electric field in the direction of generating the disclination almost disappears, so that a high-quality image without display defects due to the disclination can be displayed.

[0043]

BEST MODE FOR CARRYING OUT THE INVENTION In the liquid crystal display element according to the present invention, it is desirable that the electric field generation suppressing film is formed in a shape that alleviates a step on the surface on which the electric field generation suppressing film is formed. In that case, since the unevenness of the film surface of the alignment film provided thereon becomes gentle, the film surface of this alignment film can be subjected to almost uniform alignment treatment. It is possible to more effectively prevent the occurrence of disclination by eliminating the unstable alignment state of the liquid crystal molecules that triggers the alignment of the liquid crystal molecules along.

[0044]

1 and 2 show an embodiment of the present invention. 1 is a sectional view of a part of the liquid crystal display element along the row direction, FIG. 2 is a sectional view of a part of the liquid crystal display element along the column direction, and FIG. 2 corresponds to the cross section taken along line IV, and FIG. 2 corresponds to the cross section taken along line VV of FIG. 3 in the conventional liquid crystal display device.

The liquid crystal display element of this embodiment is different from FIG. 3 in that the electric field generation suppressing film 30 is provided on the inner surface of the back substrate 1.
Although different from the conventional liquid crystal display element shown in FIG. 6, other configurations are the same as those of the conventional one, and therefore corresponding parts are denoted by the same reference numerals in the figure, and description of the same parts is omitted. .

The liquid crystal display element of this embodiment has a pixel electrode 3, a switching element 4, a scanning line 10 and a signal line 11.
Of the pixel electrodes 3 on both sides of the signal line 11 provided on the back side substrate 1 on the inner surface of the back side substrate 1 on which the above-mentioned elements are formed.
Electric field generation suppressing film 3 covering a region extending from above the edge of the pixel electrode 3 on the side of the alignment treatment direction a to above the signal line 11.
0 is provided and the alignment film 15 is formed thereon. In this embodiment, the portion of the electric field generation suppressing film 30 on the signal line 11 is formed so as to cover the entire width of the signal line 11. There is.

The electric field generation suppressing film 30 is made of an insulating material on the surface (the protective insulating film 12 and the pixel electrode 3) on which it is formed.
Is formed in a shape that alleviates a step on the surface of the edge portion of the. The electric field generation suppressing film 30 is made of a resin having a particularly low dielectric constant, such as PMP (poly-4) having a dielectric constant of 2.12.
-Methylpentene-1), which is formed by applying and baking epoxy resin or acrylic resin, etc., and patterning the film by the photolithography method, and has a smooth film surface with uneven changes. .

According to the liquid crystal display element of this embodiment, on the inner surface of the back side substrate 1, of the pixel electrodes 3 on both sides of the signal line 11, the alignment treatment direction a of the alignment film 15 provided on the back side substrate 1 is downstream side. The signal line 11 from above the edge of the pixel electrode 3 of
Since the electric field generation suppressing film 30 covering the region over the upper portion is provided and the alignment film 15 is formed on the electric field suppressing film 30, the lateral electric field generated between the signal line 11 and the edge of the pixel electrode 3 is reduced. At least an electric field in a direction in which the liquid crystal molecules 20a are aligned in a pretilt direction opposite to the pretilt direction due to the alignment regulation of the alignment film 15, that is, a lateral electric field in a direction in which disclination is generated can be almost eliminated.

That is, the above disclination is
The disclination occurs between the signal line 11 and the pixel electrode 3 on the downstream side of the alignment processing direction a of the alignment film 15 of the back substrate 1 of the pixel electrodes 3 on both sides of the signal line 11. If the region on the side is covered with the electric field generation suppressing film 30, the generation of the lateral electric field in the region is suppressed by the electric field generation suppressing film 30, so that the liquid crystal molecules 20a are aligned along the direction of the lateral electric field. Therefore, disclination does not occur.

Although the signal line 11 is covered with the electric field generation suppressing film 30 over the entire width in this embodiment, the alignment treatment of the alignment film 15 of the back substrate 1 of the pixel electrodes 3 on both sides of the signal line 11 is performed. Since the edge of the pixel electrode 3 on the upstream side in the direction a is not covered with the electric field generation suppressing film 30, a certain amount of lateral electric field E is provided between the edge of the pixel electrode 3 on this side and the signal line 11.
Occurs.

However, the lateral electric field E generated on this side is considerably smaller than that of the conventional liquid crystal display element because the signal line 11 is covered by the electric field generation suppressing film 30, and the lateral electric field on this side is also small. The alignment direction of the liquid crystal molecules 20a due to E is
As described in the section [Problems to be Solved by the Invention], since the orientation is almost the same as the orientation of the orientation film 15, disclination does not occur on this side.

Therefore, according to this liquid crystal display element,
It is possible to display a high-quality image without display defects such as light leakage (for negative display type) and shadow (for positive display type) due to disclination.

Further, in the liquid crystal display element of the above-mentioned embodiment, since the electric field generation suppressing film 30 is formed in a shape that alleviates the step difference on the surface on which it is formed, the electric field generation suppressing film 30 is formed on the electric field generation suppressing film 30. The unevenness of the film surface of the provided alignment film 15 becomes gentle, and therefore the film surface of this alignment film can be almost uniformly aligned. It is possible to more effectively prevent the occurrence of disclination by eliminating the unstable alignment state of the liquid crystal molecules, which causes the liquid crystal molecules to be aligned.

In the above embodiment, of the pixel electrodes 3 on both sides of the signal line 11, the signal line is provided from above the edge portion of the pixel electrode 3 on the downstream side in the alignment processing direction a of the alignment film 15 provided on the back substrate 1. The electric field generation suppressing film 30
However, the electric field generation suppressing film 30 may be formed so as to also cover the pixel electrode on the opposite side, that is, the edge of the pixel electrode 3 on the upstream side of the alignment treatment direction a. Also, the lateral electric field E generated between the edge of the pixel electrode 3 on the opposite side and the signal line 11 can be eliminated.

The liquid crystal display device of the above embodiment is
The present invention displays green and blue pixels in a mosaic array pattern, but the present invention displays an active matrix type liquid crystal display element in which pixels of each color are linearly arranged in the column direction and a black and white image. The present invention can also be applied to an active matrix type liquid crystal display device.

[0056]

According to the liquid crystal display element of the present invention, at least one of the pixel electrodes on both sides of the signal line is formed on the inner surface of the substrate on which the pixel electrode, the switching element, the scanning line and the signal line are formed. An electric field generation suppressing film is provided to cover a region extending over the signal line from the edge of the pixel electrode on the downstream side in the alignment processing direction of the alignment film provided on the substrate, and the alignment film is formed on the electric field generation suppressing film. It is possible to display a high-quality image free from display defects due to disclination by eliminating at least the lateral electric field in the direction in which disclination is generated among the lateral electric fields generated between the pixel electrode and the pixel electrode.

Further, in the liquid crystal display element of the present invention,
If the electric field generation suppressing film is formed into a shape that alleviates a step on the surface on which the electric field generation suppressing film is formed, the unevenness of the film surface of the alignment film formed thereon becomes gentle, so that the film surface of this alignment film is almost Since the alignment treatment can be performed uniformly, the unstable alignment state of the liquid crystal molecules that triggers the alignment of the liquid crystal molecules along the direction due to the influence of a minute lateral electric field is eliminated, and the occurrence of disclination is more effective. Can be prevented.

[Brief description of drawings]

FIG. 1 is a sectional view of a part of a liquid crystal display element according to an embodiment of the present invention along a row direction.

FIG. 2 is a partial cross-sectional view of the same liquid crystal display element along the column direction.

FIG. 3 is a front view of a part of a conventional liquid crystal display element.

FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG.

5 is an enlarged cross-sectional view taken along the line VV of FIG.

FIG. 6 is an enlarged view of one pixel portion of a conventional liquid crystal display element.

[Explanation of symbols]

1, 2 ... substrate 3 ... Pixel electrode 4 ... Switching element 10 ... Scan line 11 ... Signal line 13 ... Auxiliary capacitance electrode Cs ... auxiliary capacity 15 ... Alignment film a ... Orientation direction 16 ... Shading film A ... Pixel 17 ... Color filter 18 ... Counter electrode 19 ... Alignment film b ... Orientation processing direction 20a ... Liquid crystal molecule E ... Lateral electric field 30 ... Electric field generation suppressing film

Claims (2)

(57) [Claims] 1. A plurality of pixel electrodes arranged in a row direction and a column direction, a plurality of switching elements respectively connected to these pixel electrodes, and wirings along each pixel electrode row, and the switching of the row. A plurality of scanning lines for supplying the control signal to the element and a signal line which is wired along each pixel electrode column and supplies a data signal to the switching element of the column are provided, and an alignment film is provided thereon. A liquid crystal display of the active matrix type in which a liquid crystal is interposed between one of the substrates on which the liquid crystal is formed and the other of the substrates on which the counter electrode is provided to face each pixel electrode of the one substrate and the alignment film is formed on the counter electrode. In the element, on the inner surface of the one substrate, an image on the downstream side in the alignment treatment direction of the alignment film provided on at least the one substrate of the pixel electrodes on both sides of the signal line. A liquid crystal display element, comprising: an electric field generation suppressing film which covers a region extending from the edge of the element electrode to the signal line, and the alignment film formed on the electric field suppressing film. 2. The liquid crystal display element according to claim 1, wherein the electric field generation suppressing film is formed in a shape that alleviates a step on the surface on which the electric field generation suppressing film is formed.