JP2001281626A - Liquid crystal display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an opening ratio and also suppress flickers in a liquid crystal display device. SOLUTION: A liquid crystal is held between a pair of substrates, one substrate is provided thereon with scanning lines and data lines, and pixel electrodes and switching elements arranged in a matrix form and also the other substrate is provided with a counter electrode arranged thereon a light- shielding layer facing the boundary area between adjacent pixel electrodes, and a data line drive circuit for controlling the voltage of a voltage of the pixel electrodes, and the data line drive circuit inverts the polarity of a voltage to be applied to at least two or more successive pixel electrodes among plural electrodes 1 to be connected with a single scanning line to the other pixel electrodes with respect to the potential of the counter electrode, and as for the light-shielding layer BM, the parts faced to the boundary areas between adjacent pixel electrodes 1 of the same polarity are made narrower in width than the parts, facing the boundary areas between adjacent pixel electrodes of opposite polarity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and, more particularly, to a liquid crystal display device suitable for improving an aperture ratio of a display area and preventing flicker.

[0002]

2. Description of the Related Art Generally, a thin film transistor (Thin Film T) is used.
In an active matrix driving type liquid crystal display device driven by a ransistor (hereinafter abbreviated as TFT), a liquid crystal is sandwiched between a pair of substrates facing each other, and one of the pair of substrates is arranged in a number of rows and columns. The TFT array substrate is provided with a large number of pixel electrodes and TFTs corresponding to the scanning lines and data lines and their respective intersections. Further, a counter electrode is provided on the other substrate of the pair of substrates, and a data line driving circuit for controlling the voltage applied to the data lines and controlling the voltage of the pixel electrodes via the TFTs on the TFT array substrate. Is provided.

Conventionally, a pixel electrode of a liquid crystal display device has a TFT
, An inverted voltage is applied for each field, but if the entire screen has the same polarity, flicker occurs. Therefore, in the related art, for example, the voltage is set to the opposite polarity in the adjacent pixels. However, when a voltage of opposite polarity is applied to an adjacent pixel, a region called a disclination in which the orientation of the liquid crystal is disturbed is generated in a boundary region between the pixel electrodes. Therefore, a black matrix is provided in a portion corresponding to the boundary area in order to hide the disclination part.

[0004]

However, the following problems remain in the above-mentioned technology relating to the conventional liquid crystal display device. That is, conventionally, it is necessary to provide a black matrix in order to hide the disclination portion, and there is a disadvantage that the aperture ratio is reduced due to the presence of the black matrix. Also, in a liquid crystal display device of a normal black mode, there is an idea that a black matrix is not necessary because a black display is performed when no voltage is applied to the pixel electrode, but the black matrix is actually used for disclination. And the aperture ratio is also reduced in this case.

[0005] The present invention has been made in view of the above-mentioned problems, and has as its object to provide a liquid crystal display device capable of improving the aperture ratio and suppressing flicker.

[0006]

The present invention has the following features to attain the object mentioned above. That is, in the liquid crystal display device of the present invention, the liquid crystal is sandwiched between a pair of substrates facing each other, and a plurality of scanning lines and a plurality of And a switching element connected to the pixel electrode and a pixel electrode arranged in a matrix corresponding to the intersection of the scanning line and the data line, and the other of the pair of substrates A counter electrode provided on a substrate, a light-shielding layer provided on at least one of the pair of substrates opposed to a boundary region between the adjacent pixel electrodes, and a switch for controlling a voltage applied to the data line. A data line driving circuit for controlling a voltage of the pixel electrode via an element, wherein the data line driving circuit comprises a plurality of pixel electrodes connected to one scanning line. Out of which the polarity of the voltage applied to at least two consecutive pixel electrodes is inverted with respect to the other pixel electrodes with reference to the potential of the counter electrode, and the light-shielding layer is formed between adjacent pixel electrodes of the same polarity. The width of the portion facing the boundary region is narrower than that of the portion facing the boundary region between adjacent pixel electrodes of opposite polarity.

In this liquid crystal display device, the data line driving circuit includes a plurality of pixel electrodes connected to one scanning line.
Since the polarity of the voltage applied to at least two or more continuous pixel electrodes is inverted with respect to the other pixel electrodes with reference to the potential of the counter electrode, at least continuous pixel electrodes of the same polarity are present, and these pixels No disclination occurs in the boundary region between the electrodes. Further, in the light-shielding layer (so-called black matrix), a portion facing a boundary region between adjacent pixel electrodes of the same polarity (that is, a region where disclination does not occur) forms a boundary region between adjacent pixel electrodes of the opposite polarity ( That is, since the width is narrower than the portion facing the area where the disclination occurs, it is possible to effectively cover the disclination portion and to reduce the light shielding of other parts where the disclination does not occur to the minimum necessary. The display quality can be improved by increasing the rate. In addition, since the polarity of at least a part of the pixel electrodes connected to the scanning line is inverted, there is an effect of suppressing flicker. The number and arrangement of the pixel electrodes having the same polarity are preferably determined according to the effect of suppressing flicker.

In the liquid crystal display device of the present invention, liquid crystal is sandwiched between a pair of substrates facing each other, and a plurality of scanning lines and a plurality of scanning lines provided on one of the pair of substrates are provided. A plurality of data lines, pixel electrodes arranged in a matrix corresponding to intersections of the scanning lines and the data lines, and switching elements connected to the pixel electrodes, and the other of the pair of substrates A counter electrode provided on the substrate, a light-shielding layer provided on at least one of the pair of substrates facing a boundary region between the adjacent pixel electrodes, and controlling a voltage applied to the data line. A data line drive circuit for controlling the voltage of the pixel electrode via a switching element, wherein the liquid crystal display device performs black display when no voltage is applied to the pixel electrode, Of the plurality of pixel electrodes connected to one scanning line, inverts the polarity of the voltage applied to at least two or more continuous pixel electrodes with respect to the other pixel electrodes with reference to the potential of the counter electrode. The light-shielding layer is not provided at a portion facing the boundary region between the pixel electrodes of the same polarity adjacent to each other along the scanning line, and faces the boundary region between the adjacent pixel electrodes of the opposite polarity. It is characterized in that it is installed only in the part.

This liquid crystal display device is in a normal black mode, and a boundary region between pixel electrodes becomes black display and blocks light transmission. Therefore, the liquid crystal display device faces a boundary region between adjacent pixel electrodes of the same polarity along a scanning line. The contrast can be obtained without providing a light-shielding layer at the part where the light is emitted, and the light-shielding layer is installed only at the part facing the boundary area between pixel electrodes of opposite polarity where disclination occurs, and disclination is performed. By hiding, the aperture ratio can be improved as a whole.

In the liquid crystal display device according to the present invention, it is preferable that the data line driving circuit inverts the polarity for each of a plurality of and the same number of continuous pixel electrodes. In this liquid crystal display device, since polarity inversion is performed for each of a plurality of and the same number of continuous pixel electrodes, flicker can be uniformly suppressed as a whole.

Further, in the liquid crystal display device according to the present invention, it is preferable that the data line driving circuit inverts the polarity for each of the three consecutive pixel electrodes. In this liquid crystal display device, by inverting the polarity for each of three consecutive pixel electrodes, three pixels corresponding to red (R), green (G), and blue (B), which are the three primary colors of light in a color filter or the like, are obtained. Can be regarded as one unit, and it is possible to further prevent color mixture of color materials and improve contrast and the like.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment according to the present invention will be described below with reference to FIGS. FIG. 1 is an equivalent circuit of various elements, wiring, and the like in a plurality of pixels forming an image display area of the liquid crystal display device of the present embodiment. FIG. 2 shows a TFT on which data lines, scanning lines, pixel electrodes, etc. are formed.
FIG. 3 is a plan view of a plurality of adjacent pixel groups on an array substrate (active matrix substrate).

[Structure of Main Portion of Liquid Crystal Device] TF of this embodiment
The T array substrate (active matrix substrate) 7 is a TF
It is used for a liquid crystal display device of an active matrix drive system by T drive. As shown in FIGS. 1 and 2, in the TFT array substrate 7, a plurality of pixels formed in a matrix forming an image display area include a pixel electrode 1 and a dual gate structure for controlling the pixel electrode 1. And a data line 3 for supplying an image signal is electrically connected to a source region of the TFT 2. The image signals S1, S2,..., Sn to be written to the data lines 3 may be supplied line-sequentially in this order, or may be supplied to a plurality of adjacent data lines 3 for each group. good. The scanning lines 4 are electrically connected to the gate electrodes of the TFTs 2, and the scanning signals G1, G2,..., Gm are applied to the scanning lines 4 in a pulsed manner in this order at a predetermined timing. It is configured as follows. The pixel electrode 1 is TF
.., Sn supplied from the data line 3 at a predetermined timing by closing the switch of the switching element TFT2 for a predetermined period. Write.

The TFT 2 includes two TFTs 2a, 2
b has a dual gate structure in which the source region and the drain region are commonly connected and connected in series.
In the case of such a multi-gate structure, the same signal is applied to the scanning lines serving as the respective gate electrodes, so that leakage current at the junction between the channel and the source-drain region can be prevented, The current can be reduced.

The image signals S1, S2,..., Sn of a predetermined level written in the liquid crystal via the pixel electrode 1 are exchanged with a counter electrode (described later) formed on a counter substrate (described later) for a certain period. Will be retained. The liquid crystal modulates light by changing the orientation and order of the molecular assembly according to the applied voltage level, thereby enabling gray scale display. Here, in order to prevent the held image signal from leaking, a storage capacitor 5 as an auxiliary capacitor is added in parallel with a liquid crystal capacitor formed between the pixel electrode 1 and the counter electrode. For example, the voltage of the pixel electrode 1 is held by the storage capacitor 5 for a time that is three digits longer than the time when the source voltage is applied. Thereby, the holding characteristics are further improved, and a liquid crystal device having a high contrast ratio can be realized. Note that, in the present embodiment, as a method of forming the storage capacitor 5, a capacitor line 6 which is a wiring for forming a capacitor with a semiconductor layer (described later) is provided.

As shown in FIG. 2, an indium tin oxide (hereinafter, referred to as “indium tin oxide”) is provided on the TFT array substrate 7.
A plurality of pixel electrodes 1 (contours are indicated by broken lines) made of a transparent conductive film such as ITO are arranged in a matrix, and data lines 3 (along the sides extending in the vertical direction of the paper of the pixel electrodes 1). A contour is shown by a two-dot chain line), and a scanning line 4 and a capacitor line 6 (both are shown by a solid line) are provided along sides extending in the horizontal direction of the paper. That is, the pixel electrode 1 is formed in a pixel area defined by the scanning lines 4 and the data lines 3.

In the present embodiment, the semiconductor layer 8 made of a polysilicon film (the outline is shown by a dashed line) has a U-shape formed near the intersection of the data line 3 and the scanning line 4. A character portion 8a is formed. That is, the U-shaped portion 8a crosses the scanning line 4 twice to form two channel regions. And the U-shaped part 8a is
One end of “a” extends long in the direction of the adjacent data line 3 (rightward on the paper) and in the direction along the data line 3 (upward on the paper).

Contact holes 9 and 10 are formed at both ends of the U-shaped portion 8a of the semiconductor layer 8, and one contact hole 9 is a source contact hole for electrically connecting the data line 3 to the source region of the semiconductor layer 8. The other contact hole 10 is a drain contact hole for electrically connecting the drain electrode 11 (the outline is indicated by a two-dot chain line) and the drain region of the semiconductor layer 8. Further, a pixel contact hole 12 for electrically connecting the drain electrode 11 and the pixel electrode 1 is formed at an end of the drain electrode 11 opposite to the side where the drain contact hole 10 is provided. .

The TFT 2 in the present embodiment crosses the scanning line 4 twice at the U-shaped portion 8a of the semiconductor layer 8, and as described above, the TFT having two gates on one semiconductor layer, A so-called dual gate type TFT is formed. The capacitance line 6 extends along the scanning line 4 so as to penetrate the pixels arranged in the horizontal direction of the paper surface, and has a branched part 6a.
Extend in the vertical direction of the drawing along the data line 3. Therefore, as shown in FIGS. 2 and 3, the semiconductor layer 8 (lower electrode 46) and the capacitor line 6, both of which extend long along the data line 3.
Form a storage capacitor 5 with the gate insulating layer 44 interposed therebetween.

Next, the sectional structure will be described.
As shown in FIG. 1, the liquid crystal display device of the present embodiment has a pair of transparent substrates, one of which is a TFT array substrate 7 and the other of which is a counter substrate 15 which is disposed to face the other. And The TFT array substrate 7 and the opposing substrate 15 use, for example, a quartz substrate or a glass substrate as a supporting substrate.
Is a glass substrate 41, and the opposite substrate 15 is a glass substrate 15.
a is adopted.

The TFT 2 formed on the TFT array substrate 7
Is a scanning line 4, a channel region 50 of the semiconductor layer 8 where a channel is formed by an electric field from the scanning line 4,
A gate insulating film 44, which is an insulating thin film that insulates the semiconductor layer 8 from the semiconductor layer 8, a data line 3, a source region 49 and a drain region 51 of the semiconductor layer 8 are provided.

On the glass substrate 41 including the scanning lines 4 and the gate insulating film 44, a first contact layer 9 having a source contact hole 9 leading to a source region 49 and a drain contact hole 10 leading to a drain region 51 are formed. An insulating layer 52 is formed. That is, the data line 3 is electrically connected to the source region 49 via the source contact hole 9 penetrating the first interlayer insulating layer 52. Further, the data line 3, the drain electrode 11, and the first
On the interlayer insulating layer 52, a second interlayer insulating layer 53 in which a pixel contact hole 12 leading to the drain electrode 11 is formed.
Are formed. That is, the drain region 51 is
Drain contact hole 1 penetrating through interlayer insulating layer 52
0, and is electrically connected to the pixel electrode 1 through the pixel contact hole 12 penetrating the second interlayer insulating layer 53. Further, a first alignment film 54 on which a predetermined alignment process such as a rubbing process is performed is provided on the second interlayer insulating layer 53 and the pixel electrode 1. The first alignment film 54 is a horizontal alignment film made of a polyimide polymer resin.

On the other hand, a counter electrode (common electrode) 55 is provided on the entire inner surface of the counter substrate 15, and a second alignment film 56 on which a predetermined alignment process such as a rubbing process is performed is provided below the counter electrode 55. It is provided to face the first alignment film 54. The counter electrode 55 is, for example, an IT
It is formed from a transparent conductive thin film such as an O film. Similarly to the first alignment film 54, the second alignment film 56 is formed of an organic thin film such as a polyimide thin film. Further, counter substrate 1
Reference numeral 5 denotes a color filter CF in which red (R), green (G), and blue (B), which are the three primary colors of light, are repeatedly arranged in order for each pixel display area, and light is shielded from areas other than the display area of each pixel. A black matrix (light shielding layer) BM provided as a film is provided. This black matrix BM has the function of covering the disclination portion described above, and also allows the incident light from the counter substrate 15 side to enter the channel region 50, the source region 49, the drain region 51, and the like in the semiconductor layer 8 of the TFT 2. And a function of improving contrast, preventing color mixture of color materials, and the like.

[Overall Configuration of Liquid Crystal Device] Next, the overall configuration of a liquid crystal device 40 using the TFT array substrate 7 of the present embodiment will be described with reference to FIGS.

4 and 5, on the TFT array substrate 7, a sealing material 28 is provided along the edge thereof, and a light shielding film 29 as a frame is provided in parallel with the inside of the sealing material 28. . A data line drive circuit 30 and an external circuit connection terminal 31 are provided along a side of the TFT array substrate 7 in a region outside the seal member 28, and a scan line drive circuit 32 is provided on two sides adjacent to the one side. It is provided along. If the delay of the scanning signal supplied to the scanning line 4 does not matter, it goes without saying that the scanning line driving circuit 32 may be provided on only one side. Further, the data line driving circuits 30 may be arranged on both sides along the sides of the image display area. For example, the odd-numbered data lines 3 supply an image signal from a data line driving circuit disposed along one side of the image display area, and the even-numbered data lines 3 are provided on the opposite side of the image display area. The image signal may be supplied from a data line driving circuit disposed along the line. When the data lines 3 are driven in a comb-tooth shape in this manner, the area occupied by the data line driving circuit can be expanded, so that a complicated circuit can be formed. Further, on the remaining one side of the TFT array substrate 7, a plurality of wirings 33 for connecting between the scanning line driving circuits 32 provided on both sides of the image display area are provided. At least one corner of the counter substrate 15 is provided with a conductive material 34 for establishing electrical connection between the TFT array substrate 7 and the counter substrate 15. The opposite substrate 15 having substantially the same contour as the seal member 28 is fixed to the TFT array substrate 7 by the seal member 28.

A liquid crystal 16 is sealed between the TFT array substrate 7 and the counter substrate 15 in which the pixel electrode 1 and the counter electrode 55 face each other. In the state where no is applied, a predetermined alignment state is obtained by the action of the alignment film. That is, the first and second alignment films 54 and 56, which are horizontal alignment films, have been rubbed, and the liquid crystal molecules assume a horizontal alignment state having a slight pretilt angle when no electric field is applied.

In this embodiment, the data line driving circuit 30
However, as shown in FIG. 6, in a plurality of pixel electrodes 1 connected to one scanning line 4, the polarity of the voltage applied to each of the three consecutive pixel electrodes 1 is changed with respect to the other adjacent pixel electrodes 1. The voltage control of the pixel electrode 1 is performed such that the voltage is inverted with reference to the potential of the counter electrode 55. The three pixel electrodes 1 having the same polarity at the same time correspond to the three primary colors red (R), green (G), and blue (B) in the color filter CF.
One unit is one unit. In the data line 3 direction, the polarity is inverted for each pixel electrode 1. Further, the black matrix BM includes a portion BM facing a boundary region between pixel electrodes 1 having the same polarity and adjacent in the scanning line 4 direction.
1 has a smaller width than a portion BM2 facing a boundary region between adjacent pixel electrodes 1 of opposite polarities. In the present embodiment, for example, the width of the portion BM1 facing the boundary region between the pixel electrodes 1 of the same polarity is 5 to 6 μm, and the pixel electrode 1 of the opposite polarity is used.
The width of the portion BM2 facing the boundary region between the two is 10 to 15 μm.
m. The width of the portion of the black matrix BM facing the boundary region between the pixel electrodes 1 adjacent to each other in the data line 3 direction is determined to have a size that sufficiently covers the TFT 2 and the like in the boundary region.

As described above, since the voltage polarity of the pixel electrode 1 is inverted for every three pixels, as shown in FIG.
Does not occur, and a disclination D occurs only in the boundary region between the pixel electrodes 1 having the opposite polarity every third pixel. That is, since the polarity of the pixel electrode 1 is inverted every three pixels, flicker can be uniformly suppressed as a whole, and the area where the disclination D occurs is reduced as compared with the case where the polarity is inverted for each pixel electrode. . further,
In the black matrix BM, a portion BM1 facing a boundary region between adjacent pixel electrodes 1 of the same polarity (that is, a region where disclination D does not occur) is a boundary region between adjacent pixel electrodes 1 of the opposite polarity (that is, a disk region). Since the width is narrower than the portion BM2 facing the area where the ligation D occurs, the disclination portion can be effectively covered, and the light shielding of other portions can be reduced to the minimum necessary. The display quality can be improved.

The light 3 in the color filter CF is
By performing polarity reversal for each of three consecutive pixel electrodes 1 corresponding to the primary colors red (R), green (G), and blue (B), it is possible to further prevent color mixture of color materials and improve contrast and the like. Can be. In the above embodiment, the same polarity is set for each of the three pixel electrodes 1 that are continuous in the scanning line 4 direction, and the polarity of the pixel electrodes 1 arranged along the data line 3 is inverted for each pixel. The number of pixel electrodes to be used may be two or more within a range where flicker can be effectively suppressed, and may not be linearly continuous.

For example, in the above embodiment, in order to invert the polarity of the pixel electrodes 1 arranged along the data lines 3 for each pixel, the pixel electrodes 1 are shifted by three in the scanning line 4 direction for each scanning line 4. Although the polarity is the same, as another embodiment, as shown in FIG. 8, the polarity inversion may be performed by shifting the pixel electrodes 1 one by one in the scanning line 4 direction for each scanning line 4. Also,
As shown in FIG. 9, three pixel electrodes 1 adjacent to each other and arranged in a triangle and corresponding to the three primary colors may have the same polarity and be inverted in polarity.

Next, a second embodiment of the present invention will be described with reference to FIG.

The difference between the second embodiment and the first embodiment is that the first embodiment is a liquid crystal display device of a normal white mode in which white display is performed when no voltage is applied to the pixel electrode 1, The matrix BM is each pixel electrode 1
The second embodiment is a liquid crystal display device of a normal black mode in which black display is performed when no voltage is applied to the pixel electrode, whereas the liquid crystal display device is provided in all portions facing the boundary region between the two. As shown in FIG. 10, the black matrix BM is not provided at a portion facing the boundary region between the pixel electrodes 1 of the same polarity adjacent to each other along the scanning line 4 and between the adjacent pixel electrodes 1 of the opposite polarity. This is a point that is provided only in a portion facing the boundary region.

That is, since the boundary region between the pixel electrodes 1 becomes black display and blocks the transmission of light, as described above, the black matrix BM is formed along the scanning line 4 between the adjacent pixel electrodes 1 of the same polarity. The contrast can be obtained even if the black matrix BM is not provided in a portion facing the pixel electrode, and the black matrix BM is provided only in the portion facing the boundary region between the pixel electrodes 1 of the opposite polarity where the disclination occurs. Can be hidden, and the aperture ratio can be improved as a whole. In each of the above embodiments, the data line driving circuit 30 provided on the TFT array substrate 7 is used.
Thus, the polarity inversion of the pixel electrode 1 is controlled, but a data line driving circuit having the same function may be provided outside the TFT array substrate.

[0034]

As described above in detail, according to the liquid crystal display device of the present invention, the data line driving circuit comprises at least two continuous pixel electrodes of a plurality of pixel electrodes connected to one scanning line. Invert the polarity of the voltage applied to the pixel electrode with respect to the other pixel electrodes with reference to the potential of the counter electrode,
In the light-shielding layer, the portion facing the boundary region between adjacent same-polarity pixel electrodes is made narrower than the portion facing the boundary region between adjacent opposite-polarity pixel electrodes. In addition to effectively covering the disclination part, the minimum necessary light shielding is performed with a relatively narrow light shielding layer in the boundary area between pixel electrodes of the same polarity where disclination does not occur, and the aperture ratio as a whole is reduced. And display quality can be improved.

Further, according to the liquid crystal display device of the present invention, a normal black mode is adopted, wherein the light-shielding layer faces a boundary region between adjacent pixel electrodes of the same polarity along a scanning line. And the pixel electrode is provided only in a portion facing the boundary region between adjacent opposite polarity pixel electrodes. Contrast can be gained, and the portion facing the boundary between pixel electrodes of opposite polarity where disclination occurs has a light-shielding layer, so that disclination can be effectively hidden, improving the overall aperture ratio Can be done.

[Brief description of the drawings]

FIG. 1 is an equivalent circuit diagram of a liquid crystal display device according to a first embodiment of the present invention.

FIG. 2 is an enlarged plan view of a main part showing a pixel configuration of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a plan view showing the entire configuration of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 5 is a sectional view taken along line HH of FIG. 4;

FIG. 6 is an enlarged plan view illustrating a black matrix of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 7 is a schematic cross-sectional view of a main part showing an arrangement of a black matrix and pixel electrodes of the liquid crystal display device according to the first embodiment of the present invention.

FIG. 8 is an enlarged plan view showing a black matrix of a liquid crystal display device according to another example of the first embodiment of the present invention.

FIG. 9 is an enlarged plan view illustrating a black matrix of a liquid crystal display device according to another example of the first embodiment of the present invention.

FIG. 10 is an enlarged plan view illustrating a black matrix of a liquid crystal display device according to a second embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 pixel electrode 2 TFT (switching element) 3 data line 4 scanning line 7 TFT array substrate (active matrix substrate) 8 semiconductor layer 15 opposing substrate 30 data line drive circuit 40 liquid crystal display device 41 glass substrate (substrate) BM black matrix (light shielding) layer)

Continued on the front page (51) Int.Cl. ⁷ Identification FI FI Theme Court II (Reference) G09G 3/36 G02F 1/136 500 (72) Inventor Masami Hayashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric In-house F term (reference) 2H092 GA59 JA25 JB42 JB52 NA07 PA02 PA08 PA09 2H093 NA16 NA31 NA32 NB07 NC34 ND10 ND22 NE06 5C006 AA22 AC26 BB16 BC06 BC12 EB05 FA23 FA54 5C080 AA10 BB05 DD06 FF11 EJ03 BA042A02E02A02A02A02E02 ED15

Claims (4)

[Claims] A liquid crystal is sandwiched between a pair of substrates facing each other, and a plurality of scanning lines and a plurality of data lines provided on one of the pair of substrates so as to intersect with each other; Pixel electrodes arranged in a matrix corresponding to the intersections of the scanning lines and the data lines, and switching elements connected to the pixel electrodes are provided, and provided on the other of the pair of substrates. A counter electrode, a light-shielding layer disposed on at least one of the pair of substrates facing a boundary region between the adjacent pixel electrodes, and controlling a voltage applied to the data line via the switching element. A data line drive circuit for controlling a voltage of a pixel electrode, wherein the data line drive circuit is at least one of the plurality of pixel electrodes connected to one scanning line. The polarity of the voltage applied to the two or more successive pixel electrodes is inverted with respect to the other pixel electrodes with reference to the potential of the counter electrode, and the light-shielding layer is formed in a boundary region between adjacent pixel electrodes of the same polarity. A liquid crystal display device characterized in that the width of an opposing portion is smaller than that of a portion opposing a boundary region between adjacent pixel electrodes of opposite polarity. 2. A liquid crystal is sandwiched between a pair of substrates facing each other, a plurality of scanning lines and a plurality of data lines provided on one of the pair of substrates so as to intersect with each other; Pixel electrodes arranged in a matrix corresponding to the intersections of the scanning lines and the data lines, and switching elements connected to the pixel electrodes are provided, and provided on the other of the pair of substrates. A counter electrode, a light-shielding layer disposed on at least one of the pair of substrates facing a boundary region between the adjacent pixel electrodes, and controlling a voltage applied to the data line via the switching element. A data line driving circuit for controlling a voltage of a pixel electrode, wherein the liquid crystal display device performs black display when a voltage is not applied to the pixel electrode, wherein the data line driving circuit includes one of the scanning lines. Of the plurality of connected pixel electrodes, the polarity of the voltage applied to at least two or more continuous pixel electrodes is inverted with respect to the other pixel electrodes with reference to the potential of the counter electrode. It is not installed in a portion facing the boundary region between the adjacent pixel electrodes of the same polarity along the scanning line, and is installed only in a portion facing the boundary region between the adjacent pixel electrodes of the opposite polarity. A liquid crystal display device characterized by the above-mentioned. 3. The liquid crystal display device according to claim 1, wherein the data line driving circuit inverts the polarity for each of a plurality of and the same number of the continuous pixel electrodes. 4. The liquid crystal display device according to claim 3, wherein the data line driving circuit inverts the polarity for each of the three consecutive pixel electrodes.