JP2008203676A - Liquid crystal display - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain satisfactory display quality of a liquid crystal display wherein a pixel electrode and a common electrode are layered via an insulating film. <P>SOLUTION: The liquid crystal display 10 includes a plurality of pixels 20. Each pixel 20 has: the pixel electrode 160 and the common electrode 140 which are provided on one substrate of a pair of substrates and layered via the insulating film; an alignment layer disposed on an liquid crystal layer side of the pixel electrode 160 and the common electrode 140; and a circuit capacitance connected to a liquid crystal capacitance via the liquid crystal layer between the pixel electrode 160 and the common electrode 140. Either one of the pixel electrode 160 and the common electrode 140 is constituted of a comb-teeth-shaped electrode having a slit part nearly parallel to a rubbing direction of the alignment layer disposed on the liquid crystal layer side. As for the circuit capacitance, capacitance values are different between the pixel 20 whose alignment layer is rubbed from an opened end side toward a closed end side of the slit part, and the pixel 20 whose alignment layer is rubbed from the closed end part toward the opened end part. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a configuration in which a pixel electrode and a common electrode are stacked via an insulating film.

  In an FFS (Fringe Field Switching) type liquid crystal display device, both a pixel electrode for controlling the alignment of liquid crystal and a common electrode are provided on the same substrate, and these two electrodes are laminated via an insulating film. . Among the electrodes, the upper electrode, that is, the electrode on the liquid crystal layer side is provided with a slit portion. When the rubbing process is performed substantially parallel to the longitudinal direction (long side direction) of the slit portion and the voltage between the electrodes is an off-voltage, the liquid crystal molecules are aligned substantially parallel to the longitudinal direction of the slit portion (initial alignment state). When a voltage higher than the off voltage is applied between the electrodes, an electric field is generated between the electrodes through the slit portion. This electric field is generated in a direction perpendicular to the long side of the slit portion, and the liquid crystal molecules rotate in a plane parallel to the substrate so as to follow the electric field direction. The amount of transmitted light is controlled by controlling the rotation angle of the liquid crystal molecules.

JP-A-11-202356 JP 2003-57670 A

  As the shape of the upper electrode provided with the slit portion, there is a comb shape.

  According to various evaluations, in the case of a comb-like electrode, a pixel rubbed from the open end side of the slit part toward the closed end side and a pixel rubbed from the closed end side of the slit part toward the open end side are It was found that the rubbing state of the alignment film was different and the tilt direction of the liquid crystal molecules was different.

  If the alignment state of the liquid crystal molecules is different, a difference in transmission efficiency occurs, so that a difference in luminance occurs between the two types of pixels. In addition, when the alignment state of the liquid crystal molecules is different, a difference occurs in the liquid crystal capacitance, resulting in a difference in the optimum potential of the common electrode, which also causes a luminance difference. As a result, display quality is degraded.

  In addition, for example, a direct current component may accumulate due to energization for a long time, and image sticking may occur. For this reason, for example, in the configuration in which the two types of pixels are alternately arranged for each display line, a seizure difference occurs between adjacent display lines, and the display quality is deteriorated.

  An object of the present invention is to provide a liquid crystal display device having a configuration in which a pixel electrode and a common electrode are stacked with an insulating film interposed therebetween and capable of obtaining good display quality.

  A liquid crystal display device according to the present invention is a liquid crystal display device including a liquid crystal layer sandwiched between a pair of substrates, and includes a plurality of pixels, and each pixel is provided on one of the pair of substrates and is insulated. A pixel electrode and a common electrode stacked via a film, an alignment film disposed closer to the liquid crystal layer than the pixel electrode and the common electrode, and a liquid crystal layer between the pixel electrode and the common electrode A circuit capacitor connected to a liquid crystal capacitor, and one of the pixel electrode and the common electrode is a comb tooth having a slit portion disposed on the liquid crystal layer side and substantially parallel to the rubbing direction of the alignment film The circuit capacitor is rubbed from the closed end side to the open end side with the pixel having the alignment film rubbed from the open end side to the closed end side of the slit portion. The capacitance values of the pixels Characterized by different things. According to the above configuration, it is possible to compensate for the difference in liquid crystal capacitance between the pixel rubbed from the open end side of the slit portion and the pixel rubbed from the closed end side by the circuit capacitance. For this reason, the potential of the pixel electrode can be compensated with the two types of pixels. Therefore, a good display quality can be obtained by suppressing a difference in luminance and the degree of occurrence of image sticking.

  The circuit capacitor includes a storage capacitor formed by a stacked structure of the pixel electrode, the insulating film, and the common electrode, and the storage capacitor has a different capacitance value of the circuit capacitor. It is preferable that the capacitance values of the pixels are different from each other. According to the above configuration, the capacitance value of the circuit capacitance can be adjusted.

  In addition, it is preferable that the comb-like electrodes have different areas in the pixels having different capacitance values of the circuit capacitance. According to the above configuration, the capacitance value of the circuit capacitance can be adjusted.

  The circuit capacitance includes a capacitance formed between the pixel electrode and the wiring via a switching element, and the capacitance via the switching element is equal to each other in the pixels having different capacitance values of the circuit capacitance. The capacitance values are preferably different. According to the above configuration, the capacitance value of the circuit capacitance can be adjusted.

  In addition, it is preferable that the switching elements have different element sizes in the pixels having different capacitance values of the circuit capacitors. According to the above configuration, the capacitance value of the circuit capacitance can be adjusted.

  In addition, the other substrate of the pair of substrates further includes a light shielding film provided with an opening facing the pixel electrode, and the opening of the light shielding film has a different capacitance value of the circuit capacitance. It is preferable that the areas are different from each other. According to the above configuration, it is possible to suppress a luminance difference between a pixel rubbed from the open end side of the slit portion and a pixel rubbed from the closed end side. Therefore, good display quality can be obtained.

  FIG. 1 shows a cross-sectional view of a part of a display area of a liquid crystal display device 10 according to an embodiment of the present invention. 2 and 3 are plan views of a part of the display area of the liquid crystal display device 10. FIG. 1 corresponds to a cross-sectional view taken along line 1-1 in FIGS. 2 and 3, and FIG. 3 corresponds to an enlarged view of a portion 3 surrounded by a one-dot chain line in FIG. 2 and 3, some of the elements shown in FIG. 1 are omitted.

  The liquid crystal display device 10 includes two support substrates 110 and 210 disposed to face each other, and a liquid crystal layer 300 sandwiched between the two support substrates 110 and 210. The support substrates 110 and 210 can be composed of a light-transmitting substrate such as a glass plate. The thickness of the liquid crystal layer 300 corresponds to the cell gap and is, for example, 2 to 4 μm.

  The liquid crystal display device 10 includes a gate line 120, a data line 122, a switching element 124, an insulating film 130, a common electrode 140, an insulating film 150, and a pixel electrode 160 on the support substrate 110 on the liquid crystal layer 300 side. , And an alignment film 170.

  Here, a case where the pixels 20 are arranged in a delta manner, in other words, a case where the pixel electrodes 160 provided in each pixel 20 are arranged in a delta manner is illustrated. In order to avoid complication of the drawing, FIG. 2 illustrates four pixels 20 with thick broken lines, and FIG. 3 illustrates only two pixel electrodes 160. In the case of the delta arrangement, the pixels 20 are arranged at an equal pitch in each row on the display screen, and are shifted from each other by a half pitch in adjacent rows. It is also possible to form a delta arrangement by arranging the pixels 20 at an equal pitch in each column on the display screen and shifting the pixels 20 by a half pitch between adjacent columns.

  Each of the gate lines 120 extends in the row direction through between adjacent pixel electrodes 160. Each data line 122 extends in the column direction passing between adjacent pixel electrodes 160. Since the pixel electrodes 160 are arranged in a delta arrangement, the gate line 120 extends linearly in the row direction, and the data line 122 extends in the column direction as a whole while locally bending. Although the gate line 120 and the data line 122 intersect each other in plan view, the gate line 120 and the data line 122 are insulated from each other by the insulating film 130.

  A switching element 124 is connected between the pixel electrode 160 and the adjacent data line 122. Although a MOS (Metal Oxide Semiconductor) transistor is illustrated here as the switching element 124, for example, a diode or the like can be used. The transistor 124 includes a semiconductor layer 124a, and a drain region and a source region formed in the semiconductor layer 124a are connected to the data line 122 and the pixel electrode 160, respectively. Note that the drain region and the source region can be formed in reverse. The semiconductor layer 124 a is stacked with the gate line 120 via a gate insulating film (not shown), and intersects the gate line 120. A portion of the gate line 120 that intersects the semiconductor layer 124 a constitutes the gate electrode of the transistor 124. Accordingly, the display data potential of the pixel 20 corresponding to the pixel electrode 160 is supplied from the data line 122 to the pixel electrode 160 via the transistor 124. A plurality of pixel electrodes 160 are connected to each gate line 120, and a plurality of pixel electrodes 160 are connected to each data line 122.

  FIG. 3 illustrates a case where the semiconductor layer 124a is U-shaped, and the gate line 120 extends across the two U-shaped arms. In this case, the transistor 124 includes two transistors connected in series.

  The common electrode 140 is disposed on the insulating film 130. The common electrode 140 can be composed of a light-transmitting conductive film such as ITO (Indium Tin Oxide). A common potential is supplied to each pixel 20 by the common electrode 140. Here, the case where the common electrode 140 is formed of a conductive film disposed over all the pixels 20 is illustrated, but for example, the common electrode 140 is divided for each pixel 20 and the plurality of divided electrodes are connected by wiring. May be. Further, for example, all the pixels 20 can be divided into a plurality of groups, and the common electrode 140 can be divided and arranged for each group.

  The pixel electrode 160 is stacked on the common electrode 140 with the insulating film 150 interposed therebetween. The pixel electrode 160 can be composed of a light-transmitting conductive film such as ITO.

  The pixel electrode 160 includes one trunk portion (or back portion) 161 and a plurality of branch portions (or tooth portions) 162. The branch parts 162 are arranged with the slit part (or groove part) 163 interposed therebetween, and constitute a line-and-space pattern together with the slit part 163. In addition, the number of the branch parts 162 and the slit parts 163 is not restricted to the illustration of illustration. The plurality of branch portions 162 are connected by a trunk portion 161 at one end. That is, the pixel electrode 160 has a comb-tooth shape. In addition, the width of the branch part 162 is 2.5-3.5 micrometers, for example, and the space | interval between the branch parts 162, ie, the width | variety of the slit part 163, is 4.0-5.0 micrometers, for example. Note that the corner (corner portion) of the contour line of the pixel electrode 160 may be square or rounded.

  Here, the case where the branch part 162 and the slit part 163 extend | stretch in parallel with the gate line 120 is illustrated. For the sake of explanation, this embodiment will be referred to as a “lateral slit type” in accordance with the embodiment shown in FIGS.

  The pixel electrode 160 is arranged in each row with the open end of the slit portion 163 facing the same side, and in the adjacent row, the open end of the slit portion 163 is arranged in the opposite direction. According to this arrangement form, the layout is highly efficient in making the pixel aperture ratio the same design for each row.

  The common electrode 140 faces not only the slit portion 163 of the pixel electrode 160 but also the trunk portion 161 and the branch portion 162, and both electrodes 140 and 160 constitute a storage capacitor via the insulating film 150.

  The alignment film 170 is laminated so as to cover the pixel electrode 160. The surface of the alignment film 170 in contact with the liquid crystal layer 300 is rubbed substantially in parallel with the longitudinal directions of the branch portions 162 and the slit portions 163, for example, in a direction inclined about 5 ° to 10 ° with respect to the longitudinal direction. An example of the rubbing direction R is schematically shown by arrows in FIG.

  The liquid crystal display device 10 includes a polarizing plate (not shown) on the opposite side of the support substrate 110 from the liquid crystal layer 300.

  The liquid crystal display device 10 includes a light shielding film 220 and a color filter 230 on the liquid crystal layer 300 side of the support substrate 210. The light shielding film 220 can be composed of various resins containing a black pigment, for example. An opening 220 a is formed in the light shielding film 220 so as to face the pixel electrode 160 for each pixel 20. A color filter 230 having a hue corresponding to the display color of the pixel 20 is disposed in each opening 220a. FIG. 1 illustrates a case where the light shielding film 220 and the color filter 230 are disposed on the support substrate 210.

  The liquid crystal display device 10 includes an overcoat layer (not shown) and an alignment film 240 that are stacked to cover the color filter 230. The surface of the alignment film 240 that contacts the liquid crystal layer 300 is rubbed in a predetermined direction. The liquid crystal display device 10 includes a polarizing plate (not shown) on the opposite side of the support substrate 210 from the liquid crystal layer 300.

  When the voltage between the common electrode 140 and the pixel electrode 160 is an off voltage, the liquid crystal molecules near the electrodes 140 and 160 are aligned in the rubbing direction R (initial alignment state). When a voltage higher than the off voltage is applied between the electrodes 140 and 160, an electric field is generated between the electrodes 140 and 160 through the slit portion 163. The liquid crystal molecules rotate in a plane parallel to the support substrate 110 along the electric field. That is, the liquid crystal (molecule) is driven. The amount of transmitted light is controlled by controlling the rotation angle of the liquid crystal molecules. The common electrode 140 and the pixel electrode 160 form an electrode pair in each pixel 20, and the electric field is generated in each pixel 20.

  For example, depending on the relationship between the rubbing direction of the two alignment films 170 and 240 and the polarization axis direction of the two polarizing plates, the liquid crystal display device 10 is normally black type and normally white type. It can be designed with either type. Here, the case where the liquid crystal display device 10 is a normally black type is illustrated.

  Although the case where the pixels 20 are delta-arranged has been illustrated above (see FIG. 2), the pixels 20 can be arranged in other arrangements such as a stripe arrangement.

  By various evaluations, the pixel 20 rubbed from the open end side of the slit portion 163 toward the closed end side (in other words, the trunk portion 161 side), and the rubbing from the closed end side of the slit portion 163 toward the open end side. It was found that the rubbing state of the alignment film 170 is different from that of the pixel 20 and the tilt direction of the liquid crystal molecules is different.

  When the alignment state of the liquid crystal molecules is different, the transmission efficiency is different, and a luminance difference is generated between the two types of pixels 20. That is, it was found that the luminance of the pixel 20 rubbed from the open end side of the slit portion 163 is lower. For this reason, in the liquid crystal display device 10, the area of the opening 220 a of the light shielding film 220 in the pixel 20 with high luminance is set small, and the luminance difference between the pixels 20 is suppressed.

Further, when the alignment states of the liquid crystal molecules are different, in the two types of pixels 20, a difference in capacitance value occurs in the liquid crystal capacitance C _LC formed through the liquid crystal layer 300 between the pixel electrode 160 and the common electrode 140. . A difference in the liquid crystal capacitance C _LC also causes a luminance difference between the two types of pixels 20. This point will be described below.

  FIG. 4 shows an equivalent circuit diagram of the pixel 20, and FIG. 5 shows an example of a drive waveform diagram of the pixel 20. 3, the transistor 124 includes two transistors connected in series. In FIG. 4, the transistor 124 is illustrated as one transistor.

As shown in FIG. 4, the pixel 20 includes a circuit capacitor C connected to the liquid crystal capacitor C _LC in addition to the liquid crystal capacitor C _LC . Here, the circuit capacitance C, illustrates the case of including a storage capacitor _{C S,} a capacitor _{C TR} by the transistor 124. The storage capacitor _CS is formed between the pixel electrode 160 and the common electrode 140 via the insulating film 150. The capacitor _CTR is a parasitic capacitor formed between the pixel electrode 160 and the gate line 120 via the transistor 124. The liquid crystal capacitor _CLC , the holding capacitor _CS and the capacitor _CTR are connected to each other through the pixel electrode 160.

5 shows, the potential _{V G} of the gate line 120, the potential _{V D} of the data lines 122, the potential _{V COM} of the common electrode 140, illustrates the variation of the potential _{V P} of the pixel electrode 160. The potential V _{C in} FIG. 5 is the center potential of the potential V _D of the data line 122.

When the transistor 124 by a change in the potential _{V G} of the gate line 120 are turned on, potential _{V P} of the pixel electrode 160 is equal to the potential _{V D} of the data line 122. After that, when the transistor 124 is turned off, the signal written from the data line 122 is held by the liquid crystal capacitor C _LC and the holding capacitor C _S. Further, the transistor 124 is turned off, the capacitance _{C LC,} C _S, the capacitive coupling _{C TR,} potential _{V P} of the pixel electrode 160 is shifted by a voltage [Delta] V.

The voltage shift, regardless of the polarity of the potential _{V D} of the data line 122, to lower the potential _{V P} of the pixel electrode 160 by a voltage [Delta] V. For this reason, generally, the potential V _COM of the common electrode 140 is set to be smaller by the voltage ΔV than the central potential V _C of the potential V _D of the data line 122.

The magnitude of the shift voltage [Delta] V is the amplitude of the electric potential _{V G} of the gate line 120 as a [Delta] V _{G,
ΔV = ΔV G × {C TR} / (C LC + C S + C TR)} ··· (1)
It is represented by

Here, when the capacitance value of the liquid crystal capacitor _CLC is different as described above, the magnitude of the shift voltage ΔV is different. For this reason, the value to be set for the potential V _COM of the common electrode 140 differs between the two types of pixels 20. In this case, if the potential V _COM is set in accordance with one type of pixel 20, a difference in luminance occurs between the two types of pixels 20.

Therefore, in the liquid crystal display device 10, by adjusting one or both of the capacitance of the capacitor C _TR by capacitance and transistor 124 of the storage capacitor C _S, by adjusting the capacitance value of the circuit capacitance C in other words by, to compensate the difference in the capacitance value of the liquid crystal capacitance C _LC. Accordingly, to compensate for the potential V _P of the pixel electrode 160, thereby suppressing the brightness difference in the above two kinds of pixels 20.

According to various evaluations, it was found that the pixel 20 rubbed from the open end side of the slit portion 163 has a lower capacitance value of the liquid crystal capacitance _CLC .

Thus, for example, the capacitance value of the storage capacitor C _S of the liquid crystal capacitance C _LC of the capacitance value higher pixel 20, by reducing only difference in the capacitance value of the liquid crystal capacitance C _LC, the magnitude of the shift voltage ΔV It can be made equivalent (refer to formula (1)). Reduction of the capacitance value of the storage capacitor C _S is, for example possible by reducing the area of the pixel electrode 160. The electrode area can be reduced, for example, by deleting the corners of the trunk 161 as shown in the plan view of FIG. Further, as shown in the plan view of FIG. 7, the electrode area can also be reduced by narrowing the widths of the trunk portion 161 and the two outermost branch portions 162. 7 indicates the contour before the width is reduced, that is, the contour of the pixel electrode 160 of the pixel 20 of the other type.

Is exemplified a case where the narrow all the 7 in stem 161 and the outermost of the two branches 162, of the three parts 161,162,162 in accordance with the reduction amount of the storage capacitor _{C S} Only a part may be narrowed. Here, it is also possible to adjust the width of the other branch part 162 except the outermost side. However, in general, the widths of the branch part 162 and the slit part 163 can be optimized in terms of orientation control, in other words, transmission efficiency. Therefore, it is easier to adjust the outermost two branch parts 162. is there.

In addition, the direction of the comb-tooth shape in FIG. 6 and FIG. 7 is an example. That is, FIGS. 6 and 7 do not indicate that the pixel 20 having the pixel electrode 160 in the illustrated direction matches the pixel 20 having the higher liquid crystal capacitance _CLC .

Similarly, by adjusting the capacitance value of the capacitor C _TR by the transistor 124, it is also possible to compensate for the difference between the liquid crystal capacitance C _LC to the magnitude of the shift voltage ΔV equal (see equation (1)) . By the adjustment of the capacitance value of the capacitor C _TR for adjusting the element size of the transistor 124, possible by adjusting the area of the intersection (i.e., the gate electrode) of the gate line 120 to adjust the width of, for example, a semiconductor layer 124a It is.

Further, for example, by reducing the shift voltage ΔV itself for both of the two types of pixels 20, the difference between the voltages ΔV generated in the two types of pixels 20 can be reduced. Reduction of the shift voltage ΔV is for example possible by reducing the capacitance value of the capacitor C _TR by the transistor 124 (see equation (1)).

Here, by potential V _P of the pixel electrode 160 is compensated by the two pixels 20, the voltage applied to the liquid crystal layer 300 is equal in the above two kinds of pixels 20. For this reason, the difference in the degree of occurrence of seizure is also suppressed. Therefore, for example, the strength of image sticking is observed alternately in line units, and the display quality is suppressed from deteriorating.

As described above, according to the liquid crystal display device 10, the luminance difference and the degree of image sticking between the pixel 20 rubbed from the open end side of the slit portion 163 and the pixel 20 rubbed from the closed end side are suppressed. Good display quality can be obtained. Incidentally, the area adjustment of the opening 220a of the light shielding film 220, the compensation of potential V _P of the pixel electrode 160, it is also possible to carry out each be effectively suppressed luminance difference by combining both it can.

  The case where the pixel electrode 160 is a horizontal slit type has been illustrated above. On the other hand, the branch part 162 and the slit part 163 can be extended parallel to the data line 122. This form is referred to as a “longitudinal slit type”. Even in the vertical slit type, the alignment film 170 covering the pixel electrode 160 is rubbed substantially parallel to the longitudinal direction of the branch part 162 and the slit part 163. For this reason, for example, the vertical slit pixel electrodes 160 are arranged with the open ends of the slit portions 163 facing the same side in each row, and the open ends of the slit portions 163 are opposite to each other in adjacent rows. Be placed.

  In addition, the branch part 162 and the slit part 163 can be extended in a direction inclined with respect to the gate line 120 or the data line 122. In this case, when the inclination angle is small, for example, 10 ° or less, it can be substantially regarded as the vertical slit type or the horizontal slit type.

  Further, in the above description, the case where the pixel electrode 160 is disposed on the liquid crystal layer 300 side with respect to the common electrode 140, that is, the case where the pixel electrode 160 is the upper electrode is illustrated, but the common electrode 140 may be the upper electrode. . In this case, the common electrode 140 is configured in a comb shape.

1 is a cross-sectional view of a liquid crystal display device according to an embodiment of the present invention. 1 is a plan view of a liquid crystal display device according to an embodiment of the present invention. 1 is a plan view of a liquid crystal display device according to an embodiment of the present invention. FIG. 3 is an equivalent circuit diagram of a pixel of the liquid crystal display device according to the embodiment of the present invention. It is a drive waveform diagram for demonstrating the liquid crystal display device which concerns on embodiment of this invention. It is a top view of an example of the comb-like electrode of the liquid crystal display device concerning an embodiment of the invention. It is a top view of other examples of the comb-like electrode of the liquid crystal display concerning an embodiment of the invention.

Explanation of symbols

10 liquid crystal display device, 20 pixels, 110, 210 substrate, 124 switching element, 140 common electrode, 150 insulating film, 160 pixel electrode, 163 slit part, 170 alignment film, 220 light shielding film, 220a opening, 300 liquid crystal layer, C Circuit capacity, C _LC liquid crystal capacity, _CS holding capacity, _CTR capacity, R rubbing direction.

Claims (6)

A liquid crystal display device comprising a liquid crystal layer sandwiched between a pair of substrates,
With multiple pixels,
Each pixel is
A pixel electrode and a common electrode provided on one of the pair of substrates and stacked via an insulating film;
An alignment film disposed closer to the liquid crystal layer than the pixel electrode and the common electrode;
A circuit capacitor connected to a liquid crystal capacitor through a liquid crystal layer between the pixel electrode and the common electrode;
Have
Either the pixel electrode or the common electrode is a comb-like electrode that is disposed on the liquid crystal layer side and has a slit portion substantially parallel to the rubbing direction of the alignment film,
The circuit capacitance includes the pixel in which the alignment film is rubbed from the open end side to the closed end side of the slit portion, and the pixel that is rubbed from the closed end side to the open end side. A liquid crystal display device having different capacitance values. The liquid crystal display device according to claim 1,
The circuit capacitor includes a storage capacitor formed by a stacked structure of the pixel electrode, the insulating film, and the common electrode,
The liquid crystal display device according to claim 1, wherein the storage capacitors have different capacitance values from each other in the pixels having different capacitance values of the circuit capacitance. The liquid crystal display device according to claim 1 or 2,
2. The liquid crystal display device according to claim 1, wherein the interdigital electrodes have different areas in the pixels having different circuit capacitance values. The liquid crystal display device according to any one of claims 1 to 3,
The circuit capacitance includes a capacitance formed through a switching element between the pixel electrode and the wiring,
The liquid crystal display device according to claim 1, wherein the capacitance through the switching element has different capacitance values in the pixels having different capacitance values of the circuit capacitance. The liquid crystal display device according to any one of claims 1 to 4,
2. The liquid crystal display device according to claim 1, wherein the switching elements have different element sizes in the pixels having different circuit capacitance values. The liquid crystal display device according to any one of claims 1 to 5,
A light-shielding film provided with an opening facing the pixel electrode on the other of the pair of substrates;
The liquid crystal display device according to claim 1, wherein the openings of the light shielding film have different areas in the pixels having different capacitance values of the circuit capacitance.

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