JP5360681B2 - Electro-optical device and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent crosstalk. <P>SOLUTION: An electro-optical device includes, on a substrate (7): an electro-optical element comprising a first electrode (131) and a second electrode (132); a first switching element which is provided between a first data line (6a) to which a data potential is supplied and the first electrode and is turned on in a first period and is turned off in a second period; and a second switching element which is provided between a second data line (6b) to which the data potential is supplied and the second electrode and is turned off in the first period and is turned on in the second period. In plan view of the substrate, the second electrode is formed so as to at least partially overlap the first and second data lines, and the first electrode is formed so as to be fitted to the widths of the first and second data lines. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an electro-optical device and an electronic apparatus including a liquid crystal or the like.

  Conventionally, an electro-optical device including a liquid crystal or the like as an electro-optical material has been provided. In this electro-optical device, it is possible to change electro-optical characteristics such as light transmittance by giving a potential difference according to image data to liquid crystal or the like. If this is individually applied to each of a plurality of electro-optical elements including the liquid crystal or the like, an image can be displayed. For applying the potential difference to the liquid crystal or the like, for example, an electrode having an appropriate shape and arrangement is used.

Various methods have been proposed for applying this potential difference to a liquid crystal or the like. Among them, there is a method in which a potential difference having a reverse polarity to the liquid crystal or the like is given at regular intervals. In order to realize this, for example, two electrodes are prepared, and two data lines (each supplying the image data) electrically connected to each of both electrodes are prepared, And the structure which provides two switching elements which govern conduction | electrical_connection and non-conduction between these two sets of data lines and electrodes is known. According to this, when supplying image data from one data line to one electrode in a certain period, the other electrode is maintained at a reference potential such as a ground potential, and in the other period, When supplying image data from the data line to the other electrode, operations such as maintaining one electrode at the reference potential are performed. As a result, a potential difference of reverse polarity is alternately applied to the liquid crystal or the like.
As such an electro-optical device, for example, a device disclosed in Patent Document 1 is known.

JP 2008-0665308 A

Incidentally, the electro-optical device as described above has a problem of so-called crosstalk.
In other words, in the above-described electro-optical device, electro-optical elements such as liquid crystal elements are arranged in a matrix. In this case, the image data is supplied by a specific electro-optical element in the arrangement. This is generally performed for each element (for example, an electro-optical element located in a specific row). In this case, it is naturally assumed that only the specific electro-optical element should react to the supplied image data.
However, at this time, electro-optical elements other than the specific electro-optical element may react to the image data. This is because the data line normally extends so as to penetrate each row of the matrix-like arrangement, and an unintended parasitic capacitance is formed between the data line and the electro-optical element. , Etc. are the main factors. This is crosstalk.

Such a phenomenon naturally affects the image quality.
In particular, in an electro-optical device having the above-described configuration, that is, two electrodes, a data line, and a switching element, each data line is used alternately if timely. ("Use" here means that it actually functions as a wiring for supplying image data), and the factors such as the setting of the arrangement relationship between each data line and each electrode are the main factors. There is a risk that the problem will be more complicated by superimposing on the screen.

An object of the present invention is to provide an electro-optical device and an electronic apparatus that can solve at least a part of the above-described problems.
Another object of the present invention is to provide an electro-optical device or an electronic apparatus that can solve the problems related to the electro-optical device or the electronic apparatus according to this aspect.

  In order to solve the above-described problems, an electro-optical device according to the present invention includes a substrate, a first electrode formed on the substrate, and a stacked structure on the first electrode and the first electrode. A second electrode formed in such a manner, an electro-optical material whose optical characteristics change according to an applied voltage between the first and second electrodes, and one side of each of the first and second electrodes As described above, the first data line is formed as a layer different from the first and second electrodes and is supplied with a data potential corresponding to the gradation to be displayed in the first period, and the first and second electrodes. A second data line formed along a second side of each electrode and different from the first and second electrodes and supplied with the data potential in the second period; and the first electrode And a first switch for electrically connecting the first data lines. A second switching element that electrically connects the second electrode and the second data line, and when viewed from above the substrate in plan view, at least a part of the second electrode is The first electrode is formed so as to overlap with the first and second data lines, and the first electrode is formed so that both sides thereof are within the width of the first and second data lines, respectively.

According to the present invention, an electro-optic element is constituted by the first and second electrodes and the electro-optic material. If the electro-optical material is a liquid crystal, the electro-optical element is a liquid crystal element. In the present invention, in the first period, the first electrode is a data potential and the second electrode is, for example, a reference potential. In the second period, on the contrary, the first electrode is, for example, a reference potential, the second electrode. Can be the data potential. If this is continued, a potential difference of opposite polarity is alternately given to an electro-optical material such as liquid crystal. According to such a configuration, first, since two switching elements are provided, the influence of feedthrough (change in voltage applied to the electro-optical element) according to the ON / OFF transition of the control signal. The effect of reducing flicker due to the first and second electrodes appearing to cancel each other or the potential difference to be applied to the electro-optic element can be reduced in principle by preparing only one type of potential difference. Various effects such as effects are enjoyed.
In the present invention, in particular, since the positional relationship between the first and second electrodes and the first and second data lines is defined as described above, the following effects can be obtained. That is, first, since the first electrode is formed so that both sides thereof are within the width of the first and second data lines, at least the entire width of the first electrode covers the first electrode. Compared with the case where the capacitance is present, the capacitance value of the parasitic capacitance generated between the first electrode and the first and second data lines may be small. On the other hand, at the same time, since at least a part of the second electrode overlaps the first and second data lines, the portion of the first and second data lines that is not covered by the first electrode, that is, In other words, the surplus portion of the width faces the second electrode. Therefore, the capacitance value of the parasitic capacitance generated between the second electrode and the first and second data lines may be increased.
In view of such a tendency of both capacitance values, according to the configuration according to the present invention, by appropriately adjusting the extent to which the side of the first electrode is within the width, the agreement between the two capacitance values can be achieved. It becomes possible to plan. According to this, in the case where the first and second switching elements are in the OFF state, the influence of the potential fluctuation received by the first electrode due to the fluctuation of the potential of the first or second data line, and the first It is possible to equalize both of the influences of potential fluctuations on the two electrodes.
Therefore, according to the present invention, the first and second electrodes can be prevented from exhibiting unintended behavior, and the problems related to crosstalk as described above can be effectively solved.

  The specific structure and material of the “electro-optical element” in the present invention can basically be freely determined. For example, in addition to the liquid crystal element already mentioned, depending on the case, an organic EL material or an inorganic EL material can be used. An element in which a light emitting layer is interposed between electrodes can be employed as the “electro-optical element” of the present invention.

In the electro-optical device according to the present invention, when the substrate is viewed in plan, the second electrode has one side coincident with the side of the first data line and the other side. May be formed so as to coincide with the side of the second data line.
According to this aspect, the above-described operational effects according to the present invention can be more reliably enjoyed. In addition, regarding this aspect, please also refer to the description part regarding FIG.13 and FIG.14 in embodiment mentioned later.

  In the electro-optical device according to the aspect of the invention, the set of the first and second electrodes and the first and second switching elements may be arranged according to a matrix arrangement on the surface of the substrate, and the matrix arrangement And a control signal for instructing a transition between the on state and the off state of the first and second switching elements corresponding to each row is supplied to the first and second switching devices. A plurality of scanning lines and one end is electrically connected to the first or second electrode included in one set of all of the sets, and the other end is in the matrix arrangement. A wiring line electrically connected to the scanning line corresponding to a row adjacent to a row to which one set belongs, and a storage capacitor provided on the wiring line; and the first electrode has both sides thereof Of the width Instead of or in addition to being formed so as to fit in, the formation mode is determined according to the value of the capacitance value of the parasitic capacitance generated between the wiring and the first or second data line May be.

According to this aspect, first, since the storage capacitor is provided, voltage application to the electro-optical element can be performed more stably. In addition, in this embodiment, a fixed potential line or the like is not specially provided in order to provide the storage capacitor, but the scanning line “corresponding to the adjacent row” is used as a substitute for the fixed potential line. Therefore, reduction of circuit elements, reduction of circuit scale, etc. are realized.
In this aspect, in particular, the formation form of the first electrode is determined according to the capacitance value between the wiring and the first or second data line. In this case, if attention is paid to the fact that the wiring is electrically connected to the first or second electrode, for example, the first electrode is connected to the first data line due to potential fluctuation of the first data line. There is a risk of potential fluctuations not only through the parasitic capacitance generated directly, but also through the parasitic capacitance generated between the first data line and the wiring and the wiring.
Given the above background, if the formation mode of the first electrode is determined in accordance with the capacitance value of the parasitic capacitance between the wiring and the first or second data line, the formation mode is eventually Similarly to the above, it can be determined that both the first electrode and the influence of the potential fluctuation received by the second electrode are made equal by the fluctuation of the potential of the first or second data line.
Therefore, according to this aspect, the above-described operational effects (solution of the crosstalk problem) according to the present invention can be enjoyed without change.

  In the electro-optical device according to the aspect of the invention, the set of the first and second electrodes and the first and second switching elements may be arranged according to a matrix arrangement on the surface of the substrate, and the matrix arrangement And a control signal for instructing a transition between the on state and the off state of the first and second switching elements corresponding to each row is supplied to the first and second switching devices. A plurality of scanning lines having one end electrically connected to the first electrode included in one set of all of the sets, and the other end in the matrix arrangement. A first wiring electrically connected to the scanning line corresponding to a row adjacent to the first row, one end electrically connected to the second electrode included in the one set, and the other end , A certain set belongs to A second wiring electrically connected to the scanning line corresponding to a row adjacent to the first row; and first and second storage capacitors provided on the first and second wirings; When the substrate is viewed in plan, the distance between the first electrode and the first data line of the first electrode is larger than the distance between the first electrode and the second data line. Thus, it may be configured to be formed.

According to this aspect, first, with respect to the point that the storage capacitor is provided, the same operation and effect as the above-described aspect are exhibited (in this aspect, the “retention capacitor” includes the first storage capacitor and the second storage capacitor. Although there is a distinction of retention capacity, it does not make an essential difference with respect to the effect.
And especially in this aspect, the following effects are show | played when the arrangement | positioning relationship between a 1st electrode and a 1st and 2nd data line is prescribed | regulated as mentioned above. That is, first, in this embodiment, if attention is paid to the first data line, (i) between the first data line and the first electrode, (ii) between the first data line and the wiring, and (iii) the first data. Parasitic capacitance is formed for each of the three patterns between the line and the second electrode. Of these, in the case of (ii) between the first data line and the wiring, since the wiring includes the first or second wiring electrically connected to the first or second electrode, (ii) The influence of the potential fluctuation through the parasitic capacitance related to () will appear in either (ii) ′ first electrode or (ii) ″ second electrode. However, since the physical distance between the first data line and the wiring is considered to be unchanged once specific design specifications for these are determined, the capacitance value of the parasitic capacitance according to (ii) is usually Invariant, and therefore also the effects of potential fluctuations occurring on (ii) ′ first electrode and (ii) ″ second electrode are usually about the same. The same is true for case (iii).
Under such a premise, as described above, if it is considered that both the influences of the potential fluctuation received by the first electrode and the second electrode due to the fluctuation of the potential of the first data line are equal, the first electrode is connected to the first electrode. In the case of the first wiring to be performed, it is preferable that the capacitance value of the parasitic capacitance related to (i) and (ii) as a whole matches the capacitance value of the parasitic capacitance related to (iii) (hereinafter referred to as simple Therefore, it may be expressed as (i) + (ii) = (iii)). Similarly, in the case of the second wiring connected to the second electrode, the capacitance value of the parasitic capacitance according to (ii) and (iii) and the capacitance value of the parasitic capacitance according to (i) are matched. It is preferable (hereinafter, for the sake of simplicity, it may be expressed as (ii) + (iii) = (i)).
In order to realize these two cases at the same time, assuming that the capacitance value of the parasitic capacitance according to (ii) and (iii) is unchanged, the capacitance value of the parasitic capacitance according to (i) There is nothing but to change appropriately in both cases.
Here, in consideration of (distance between the first electrode and the first data line)> (distance between the first electrode and the second data line) as referred to in this embodiment, in general, the parasitic term according to the left term of this expression is used. The capacitance value of the capacitance (that is, the parasitic capacitance between the first electrode and the first data line) is smaller, and the capacitance value of the parasitic capacitance according to the right term (that is, the parasitic capacitance between the first electrode and the second data line) is It will be bigger. Therefore, if the former is applied to realize the above (i) + (ii) = (iii) and the latter is applied to realize the above (ii) + (iii) = (i), respectively. These two cases can be satisfied simultaneously.
As described above, according to this aspect, the above-described operational effects (solution of the crosstalk problem) according to the present invention can be enjoyed without change.

In the aspect including the aforementioned “wiring”, the wiring has a portion extending along the extending direction of the first and second data lines, and does not overlap the first and second data lines. You may comprise so that it may be formed.
According to this aspect, since the wiring including the first and second wirings is formed so as not to overlap the first and second data lines, the capacitance value of the parasitic capacitance generated between them is suppressed to be small. Is possible. In solving the crosstalk problem, it is needless to say that the capacitance value of the parasitic capacitance (that is, the absolute value) is preferably as small as possible. Therefore, according to this aspect, the effects of the present invention described above can be more effectively achieved. It can be enjoyed.

  On the other hand, an electro-optical device according to another aspect of the present invention includes a substrate, a first electrode formed on the substrate, a first electrode on the first electrode, and the first electrode in order to solve the above problem. A second electrode formed to form a laminated structure, an electro-optical material whose optical characteristics change according to an applied voltage between the first and second electrodes, a first data line, and a second data line; A first switching element that electrically connects the first electrode and the first data line; and a second switching element that electrically connects the second electrode and the second data line. The second electrode includes a portion where the first electrode is interposed between the first data line and the second electrode in the stacking direction, and the first electrode without the first electrode in the stacking direction. A portion facing the data line, and the second data line in the stacking direction; Serial having said first electrode and a portion interposed between the second electrode, and the part facing the second data line without interposing the first electrode in the laminating direction.

  According to the present invention, since the positional relationship between the second electrode and each of the other elements is suitably defined, the operational effects that are not essentially different from the operational effects according to the present invention described above are achieved. The

Moreover, in order to solve the above-described problems, an electronic apparatus according to the present invention includes the various electro-optical devices described above.
Since the electronic apparatus of the present invention includes the various electro-optical devices described above, it is possible to display a high-quality image that avoids the influence of crosstalk.

1 is a block diagram illustrating an electro-optical device according to a first embodiment of the invention. FIG. FIG. 2 is a circuit diagram illustrating details of a pixel circuit constituting the electro-optical device in FIG. 1. FIG. 2 is a schematic plan view showing an enlarged structure of a part of an FFS (Fringe Field Switching) mode liquid crystal device as an example of the electro-optical device of FIG. 1. FIG. 4 is a cross-sectional view taken along the line X-X ′ of FIG. 3. FIG. 5 is a graph showing changes in capacitance values (γ1, γ3) of parasitic capacitances (C11, C21) shown in FIG. 4 according to changes in the distance Ds shown in FIG. 4; It is a graph showing the mode of the change of the transmittance | permeability of a liquid crystal according to the change of the distance Ds shown in FIG. FIG. 6 is a circuit diagram illustrating details of a pixel circuit constituting an electro-optical device according to a second embodiment of the invention. FIG. 8 is a diagram having the same concept as in FIG. 4, and is a schematic cross-sectional view showing a state of actual arrangement of the first and second wirings (3 a, 3 b) shown in FIG. 7. 8 is a graph showing how the capacitance value (γ5) of the parasitic capacitance (C31) shown in FIG. 8 changes according to the change in the position (Position F, G, H, I) of the first wiring (3a) shown in FIG. is there. It is a graph showing the mode of the change of the transmittance | permeability of a liquid crystal according to the position (Position F, G, H, I) of the 1st wiring (3a) shown in FIG. It is a graph showing the mode of the change of the capacitance values (γ1, γ3) of the parasitic capacitances (C11, C21) shown in FIG. 8 according to the change of the distance Ds shown in FIG. It is a graph showing the mode of the change of the transmittance | permeability of a liquid crystal according to the change of the distance Ds shown in FIG. Changes in the capacitance values (γ1, γ3) of the parasitic capacitances (C11, C21) shown in FIG. 14 according to changes in the side end positions (StructureJ, K, L, M) of the second electrode (132) shown in FIG. It is a graph showing the state of. 14 is a schematic cross-sectional view for explaining “StructureJ” to “StructureM” shown in FIG. FIG. 11 is a perspective view showing an electronic apparatus to which the electro-optical device according to the invention is applied. FIG. 14 is a perspective view showing another electronic apparatus to which the electro-optical device according to the invention is applied. FIG. 14 is a perspective view showing still another electronic apparatus to which the electro-optical device according to the invention is applied.

<First Embodiment>
Hereinafter, a first embodiment according to the present invention will be described with reference to FIGS. 1 to 4. In addition to FIGS. 1 to 4 mentioned here, in each drawing referred to below, the ratio of the dimensions of each part may be appropriately different from the actual one.

  The electro-optical device according to the first embodiment of the present invention uses liquid crystal as an electro-optical material. The electro-optical device 1 includes a liquid crystal panel AA (an example of an electro-optical panel) as a main part. In the liquid crystal panel AA, an element substrate on which a thin film transistor (“TFT”) is formed as a switching element and an opposing substrate are attached to each other with a certain gap therebetween, and a liquid crystal is sandwiched between the gaps. ing.

FIG. 1 is a block diagram showing the overall configuration of the electro-optical device 1 according to the first embodiment. The electro-optical device 1 includes a liquid crystal panel AA, a control circuit 300, and an image processing circuit 400. The liquid crystal panel AA is a transmissive type, but may be a transflective type or a reflective type.
The liquid crystal panel AA includes an image display area A, a scanning line driving circuit 100, and a data line driving circuit 200 on the element substrate. The control circuit 300 generates an X transfer start pulse DX and an X clock signal XCK and supplies them to the data line driving circuit 200, and also generates a Y transfer start pulse DY and a Y clock signal YCK and supplies them to the scanning line drive circuit 100. To do.
In the image display area A, a plurality of pixel circuits P1 are formed in a matrix, and the transmittance can be controlled for each pixel circuit P1. Light from a backlight (not shown) is emitted through the pixel circuit P1. Thereby, gradation display by light modulation becomes possible. Further, the image processing circuit 400 performs image processing on the input image data Din to generate output image data Dout, and outputs this to the data line driving circuit 200.

  Next, the image display area A will be described. In the image display area A, m (m is a natural number of 2 or more) scanning lines 3 are formed in parallel along the X direction, while the n (n is a natural number of 2 or more) sets of scan lines 3 are formed. One data line 6a and second data line 6b are formed in parallel along the Y direction. In addition, potential lines for supplying the reference potential GND (not shown in FIG. 1, but refer to reference numeral 30 in FIG. 2) are formed in parallel along the X direction. Then, m (row) × n (column) pixel circuits P1 are arranged corresponding to the intersection of the scanning line 3 with the first data line 6a and the second data line 6b.

  The first potentials X1a to Xna are respectively supplied to the n first data lines 6a, and the second potentials X1b to Xnb are respectively supplied to the n second data lines 6b. Further, scanning signals Y1, Y2,..., Ym are applied to each scanning line 3 in a line-sequential manner in a pulse manner. In the pixel circuit P1 (i, j) of i (i is a natural number of 1 ≦ i ≦ m) rows and j (j is a natural number of 1 ≦ j ≦ n) columns, the scanning signal Yi of the i-th scanning line 3 is active. Then, the first potential Xja supplied via the first data line 6a and the second potential Xjb supplied via the second data line 6b are taken in.

  FIG. 2 shows a circuit diagram of the pixel circuit P1 (i, j) of i rows and j columns. The other pixel circuits P1 are similarly configured. As shown in the figure, the pixel circuit P1 (i, j) includes n-channel first and second transistors SW101 and SW102, a first holding capacitor Cstg1, a second holding capacitor Cstg2, a third holding capacitor Cstg3, In addition, the electro-optical element 13 and the like are provided.

The electro-optical element 13 is configured by sandwiching an electro-optical material between the first electrode 131 and the second electrode 132. The electro-optical material may be any material as long as its optical characteristics change according to the applied voltage. In this example, liquid crystal LC is used. Note that the orientation of liquid crystal molecules changes in response to an applied voltage, and the optical characteristics change accordingly. In particular, an optical member such as a polarizing plate and a liquid crystal may be combined to change the light transmittance as an optical characteristic.
The first electrode 131 of the electro-optic element 13 is connected to the first node Za, while the second electrode 132 is connected to the second node Zb. A first storage capacitor Cstg1 is provided between the first node Za and the potential line 30, and a second storage capacitor Cstg2 is provided between the second node Zb and the potential line 30.
Further, a third storage capacitor Cstg3 is provided in parallel with the electro-optic element 13.
Here, some or all of the first to third storage capacitors Cstg1, Cstg2, and Cstg3 may be formed as capacitive elements, or are attached between the first electrode 131 and the second electrode 132. It may be a parasitic capacitance or a parasitic capacitance generated between the first node Za or the second node Zb and the potential line 30.

The first transistor SW101 is provided between the first node Za and the first data line 6a, and the second transistor SW102 is provided between the second node Zb and the second data line 6b.
The gates of the first and second transistors SW101 and SW102 are connected to the scanning line 3. When the scanning signal Yi becomes high level (active), both the first transistors SW101 and SW102 are turned on. Then, the first potential Xja is applied to the first electrode 131 of the electro-optical element 13 and is held by the first holding capacitor Cstg1. Further, the second potential Xjb is applied to the second electrode 132 of the electro-optic element 13 and is held by the second holding capacitor Cstg2. As a result, a voltage is applied to the liquid crystal LC, which is an electro-optical material, and the transmittance is controlled.

Based on such transmittance control, the pixel circuit P1 according to the first embodiment particularly operates as follows (see the lower part of FIG. 2).
[I] In the first period, the scanning line driving circuit 100 supplies the high-level scanning signal Yi to the scanning line 3 to turn on both the first and second transistors SW101 and SW102. At this time, the data line driving circuit 200 supplies the data potential Vdata as the first potentials X1a to Xna to the first data line 6a and the reference potential GND as the second potentials X1b to Xnb to the second data line 6b. Supply. As a result, in the electro-optical element 13, the first electrode 131 becomes the data potential Vdata, the second electrode 132 becomes the reference potential GND, and a predetermined potential difference is given to the liquid crystal LC.
[Ii] In the next period, the transition of the first and second transistors SW101 and SW102 to the ON state due to the scanning line driving circuit 100 is performed in the same manner. However, in this case, contrary to the above [i], the data line driving circuit 200 supplies the reference potential GND as the first potentials X1a to Xna to the first data line 6a and the second data line 6b. A data potential Vdata is supplied as the second potentials X1b to Xnb. Accordingly, in the electro-optical element 13, the first electrode 131 becomes the reference potential GND, the second electrode 132 becomes the data potential Vdata, and a predetermined potential difference is given to the liquid crystal LC. Thus, even if the difference between the data potential Vdata and the reference potential GND is the same as in the case of [i], at least the polarity is reversed (of course, even if the difference is not the same). , Its polarity is reversed as well.)
After [iii], the above operations [i] and [ii] are repeated (see the lower part of FIG. 2).
In the above case, it goes without saying that the data potential Vdata can have a specific value specific to each pixel circuit P1 (i, j). The specific value mainly depends on the value of the input image data Din.

  The electro-optical device 1 described as having the above configuration as a block diagram (FIG. 1) or a circuit diagram (FIG. 2) actually has a structure as shown in FIGS. 3 and 4, for example. . FIG. 3 is a schematic plan view showing an enlarged structure of a part of an FFS (Fringe Field Switching) mode liquid crystal device as an example of an electro-optical device. FIG. 4 is a schematic cross-sectional view showing a part of the liquid crystal device shown in FIG. 3 in an enlarged manner.

  3 and 4, the first electrode 131 and the second electrode 132 having a substantially rectangular shape in plan view are the first electrode 131 and the second electrode constituting the electro-optic element 13 shown in FIG. (Hereafter, the names and symbols of the corresponding elements are shared in the same manner). Among these, as shown in FIG. 3, the first electrode 131 has a shape in which the lower left corner of the rectangular shape is partially cut away. On the other hand, the second electrode 132 has a shape in which the lower right corner portion in the drawing is partially cut away. The region corresponding to the notched portion is for forming a contact hole for realizing electrical connection between the first electrode 131 and the first data line 6a or between the second electrode 132 and the second data line 6b. It is used for areas such as In FIG. 3, a semiconductor layer (layer including a source region, a drain region, and a channel region) 111 constituting the first transistor SW101 and the first electrode 131 are electrically connected via a contact hole CH2, and The semiconductor layer 111 and the first data line 6a are electrically connected through the contact hole CH1. Similarly, the semiconductor layer 121 and the second data line 6b constituting the second transistor SW102 are electrically connected via the contact hole CH4, and the semiconductor layer 121 and the second electrode 132 are electrically connected via the contact hole CH3, respectively. Connected to.

  The second electrode 132 also has a plurality of slits 132s as shown in FIGS. In the first embodiment, the slits 132 s have a substantially rectangular shape that is long in the vertical direction in FIG. 3, and are arranged so that each one is parallel to each other.

As shown in FIGS. 3 and 4, the first electrode 131 and the second electrode 132 are in a relationship where the former is a lower layer and the latter is an upper layer, and they overlap each other so that their outer edge portions coincide in plan view. As shown in FIG. 4, an interlayer insulating film 303 made of a suitable material such as SiO ₂ or SiN is formed between the two, and an electrical short circuit between the two is prevented. The third storage capacitor Cstg3 is configured by the first electrode 131 and the second electrode 132, and the interlayer insulating film 303 interposed therebetween (see FIGS. 4 and 2).
Such a configuration including a pair of overlapping of the first electrode 131 and the second electrode 132 forms the basis of the pixel circuit P1 described above. Note that the first embodiment is particularly characterized in the formation position of the first electrode 131 or the arrangement relationship with the first data line 6a or the second data line 6b. This point will be described later.

Also in this liquid crystal device, the first data line 6a and the second data line 6b are formed so as to be positioned in a lower layer in the first electrode 131 in FIG.
In addition, the arrangement | positioning relationship between these both is set so that the left side in FIG. 3 of the 1st data line 6a may correspond with the left side in the figure of the 2nd electrode 132. FIG. Similarly, the arrangement relationship between the two data lines 6b is set so that the right side of the second data line 6b in FIG. 3 coincides with the right side of the second electrode 132 in FIG.
In addition, an interlayer insulating film 302 is formed between the first data line 6a and the second data line 6b and the first electrode 131, as shown in FIG.

Each element such as the first electrode 131, the first data line 6a, and the like is formed using an element substrate 7 made of glass or the like as a base, as shown in FIG.
4 shows that an interlayer insulating film 301 is formed between the element substrate 7 and the interlayer insulating film 302. This is because the scanning lines 3 and the potential lines 30 (described above) For these, see FIG. 3), and further to form various circuit elements such as the first holding capacitor Cstg1 (not shown in FIGS. 3 and 4), or the electrical circuit between such circuit elements. It is used for preventing short circuit and setting a suitable three-dimensional arrangement relationship between the circuit elements (however, in FIG. 3 and FIG. 4, all or part of the circuit elements and their connection modes). The illustration about is omitted.)

  3 and 4, in addition to the above, various elements such as an alignment film on the second electrode 132, the liquid crystal LC, or a black matrix for preventing color mixture of light between the pixel circuits P1 can be provided. However, the illustration is omitted. 3 and 4 are merely examples, and an arrangement manner different from the arrangement manner of the various circuit elements described above is adopted by providing other interlayer insulation films other than the above-described interlayer insulation films 301 to 303. May be. The present invention basically includes any arrangement within the scope thereof.

  In such a configuration, when a driving voltage is applied between the first electrode 131 and the second electrode 132, an electric field corresponding to the shape of these electrodes is generated. More specifically, an electric field having electric lines of force that emerge from the upper surface of the second electrode 132, pass through the slit 132s of the second electrode 132, and reach the upper surface of the first electrode 131 is generated. At this time, the electric field above the second electrode 132 (that is, the region where the liquid crystal LC is disposed) becomes a lateral electric field having a component parallel to the element substrate 7. The liquid crystal molecules are driven by this lateral electric field and change the alignment direction in a plane parallel to the element substrate 7. According to the FFS mode liquid crystal device, a wide viewing angle can be obtained because the liquid crystal molecules are always driven in parallel with the element substrate 7 as described above.

Next, in addition to FIGS. 1 to 4 that have already been referred to, the characteristics of the first embodiment, particularly the relationship between the first electrode 131 and the first and second data lines 6a and 6b, are shown in FIGS. This will be described with reference to the drawings.
In the first embodiment, between the first electrode 131 and the first and second data lines 6a and 6b and between the second electrode 132 and the first and second data lines 6a and 6b, FIG. As shown in FIG. 1, first to fourth parasitic capacitors C11, C12, C21, and C22 are formed. Here, the first parasitic capacitance C11 is a capacitance element configured between the first electrode 131 and the first data line 6a, and the second parasitic capacitance C12 is the first electrode 131 and the second data line 6b. It is a capacity element comprised between. The third parasitic capacitance C21 is a capacitive element configured between the second electrode 132 and the first data line 6a, and the fourth parasitic capacitance C22 is between the second electrode 132 and the second data line 6b. (FIG. 2 also shows how these first to fourth parasitic capacitors C11, C12, C21, and C22 are represented on the circuit diagram. Oita.).

  These first to fourth parasitic capacitances C11, C12, C21, and C22 cause crosstalk. That is, all the pixel circuits P1 (see FIG. 1) constituting the electro-optical device 1 of the first embodiment are driven through the process of selecting the scanning lines 3 in a line sequential manner as described above. Originally, the pixel circuits P1 other than the pixel circuit P1 to be selected should not react to the data signal Vdata supplied via the first and second data lines 6a and 6b. However, the first to fourth parasitic capacitances C11, C12, C21, and C22 as shown in FIG. 4 are the first even if the first and second transistors SW101 and SW102 shown in FIG. Alternatively, the potential fluctuation of the second data line 6a or 6b may be relayed to the potential fluctuation of the first or second electrode 131 or 132.

Therefore, in the first embodiment, an appropriate relationship as described below is set between the first electrode 131 and the first data line 6a.
First, paying attention to the distance Ds between the first electrode 131 and the first data line 6a as shown in FIG. 4, the influence of the magnitude of the distance Ds on the capacitance value is considered. As can be seen from FIG. 4, if the distance Ds increases (that is, if the first electrode 131 moves backward in the right direction in the drawing (see the broken line arrow in FIG. 4)), the first electrode 131 and the first electrode 131 Since the distance between the data lines 6a increases, it is estimated that the capacitance value γ1 of the first parasitic capacitance C11 decreases. On the other hand, since the increase in the distance Ds has a side surface that increases the facing area between the second electrode 132 and the first data line 6a, the capacitance value γ3 of the third parasitic capacitance C21 may increase. Guessed.

  FIG. 5 is a graph showing a simulation result that confirms how the capacitance values γ1 and γ3 become in accordance with the change in the distance Ds (note that the simulation results in all the embodiments described in this specification are And obtained using a liquid crystal simulator 2DIMOS). According to this figure, it can be seen that, as the distance Ds increases, the capacitance value γ1 gradually decreases while the capacitance value γ3 gradually increases as the above-described assumption is supported. However, after the distance Ds becomes an intermediate value in the figure (“Structure C” in the figure), even if the distance Ds increases, the capacitance values γ1 and γ3 do not change greatly and take a substantially constant value. I understand that.

  In FIG. 5, “Structure A” means that the left end of the first electrode 131 in FIG. 4 is aligned with that of the first data line 6 a as shown in FIG. 4 (that is, when Ds = 0). “Structure B” represents a case where the left end of the first electrode 131 in FIG. 4 and the right end of the first data line 6a in FIG. 4 are aligned. Also, “StructureC” represents a case where the left end of the first electrode 131 in FIG. 4 has retreated to a point just before reaching the first slit 132s of the second electrode 132, and “StructureD” represents the slit 132s. In this case, “Structure E” represents a case of further retreating to a point just before the slit 132s (see FIG. 4 for both).

  On the other hand, FIG. 6 is a graph showing a simulation result confirming how the transmittance of the liquid crystal LC changes according to the change of the distance Ds. According to this figure, until the “StructureC”, It can be seen that even when the distance Ds is increased, the transmittance remains substantially constant, and when the distance Ds is exceeded, the transmittance decreases. However, after that, the decreased state is maintained and the transmittance has a substantially constant value. This is considered to be a phenomenon corresponding to the arrangement relationship between the first electrode 131 and the second electrode 132, particularly the slit 132s. That is, in Structures D and E, the left end of the first electrode 131 is retracted to the position where the slit 132s is formed, so that the electrical side of the second electrode 132 (see reference numeral 132MS in FIG. 4) It is thought that the transmittance decreases as a result of the loss of the field line.

  In view of the above circumstances, from the viewpoint of equalizing the influence of the first parasitic capacitance C11 and the third capacitance element C21 on the first electrode 131 and the second electrode 132, the star mark in FIG. It can be seen that it is preferable to select a point obtained by satisfying γ1 = γ3. Thereby, even if the potential fluctuation of the first data line 6a affects the first and second electrodes 131 and 132, since γ1 = γ3 is established, there is no difference in the influence between the two. Because. In this case, since the transmittance is maintained at a high level (see FIG. 6), there is little possibility that such arrangement adjustment affects the image quality.

As a result of the above consideration, in the first embodiment, the arrangement relationship between the first electrode 131 and the first data line 6a is “Structure Z1” shown in FIG. 5, in other words, the left side of the first electrode 131 in FIG. The arrangement relation is set so that the end (left side in FIG. 3) stops in the middle of the width of the first data line 6a (in order to avoid congestion of the drawing). (Not shown in FIG. 3).
This also applies to the right end of the first electrode 131 in FIG. That is, since it has been confirmed that the same result as described above can be obtained for the relationship between the first electrode 131 and the second data line 6b, the right end of the first electrode 131 has the width of the second data line 6b. The arrangement relationship between the two is set so as to stop in the middle. Thus, γ2 = γ4 is established between the capacitance value γ2 of the second parasitic capacitance C12 and the capacitance value γ4 of the fourth parasitic capacitance C22. Further, if the structure of the pixel circuit P1 is bilaterally symmetrical, γ1 = γ2 = γ3 = γ4 is satisfied. Incidentally, in the left side of FIG. 4, the right end of the first electrode 131 adjacent to the first electrode 131 shown in the right side of FIG. 4 is drawn, and the right end is the first electrode shown in the right side of FIG. 4. It can be considered that the state of the right end of 131 is drawn.
At the same time as described above, the arrangement relationship between the second electrode 132 and the first data line 6a and the second data line 6b is also set. That is, since the left end of the first electrode 131 in FIG. 4 is set to stop in the middle of the width of the first and second data lines 6a and 6b as described above, the second electrode 132 has its first The first and second data lines 6a and 6b are opposed to each other by the amount of retreat of one electrode 131.

  According to the electro-optical device 1 according to the first embodiment as described above, the occurrence of crosstalk or an adverse effect caused thereby is effectively suppressed. As described above, such an effect is obtained because the positional relationship between the first electrode 131 and the first and second data lines 6a and 6b is suitably set so that γ1 = γ3 is satisfied. By. In the first embodiment, it is also noted that such an effect can be obtained without causing degradation of image quality or the like (see FIG. 6 and the above description related thereto).

Second Embodiment
Hereinafter, a second embodiment according to the present invention will be described with reference to FIGS. In the second embodiment, the configuration related to the first and second storage capacitors Cstg1 and Cstg2 shown in FIG. 2 is changed, and the first electrode 131, the first data line 6a, etc. according to the change are added. The other points are the same as the configuration and operation or action of the first embodiment. Therefore, hereinafter, the difference will be mainly described, and the description of other points will be simplified or omitted as appropriate.

In the second embodiment, the first and second storage capacitors Cstg1 [i] and Cstg2 [i] included in the pixel circuit P2 are not electrically connected to the potential line 30 as shown in FIG. As shown in FIG. 7, it is electrically connected to the scanning line 3 corresponding to the pixel circuit P2 located in the previous row. In FIG. 7, the symbol [i-1] is used to represent the pixel circuit P2 located in the previous row, and the symbol [i] is used to represent the pixel circuit P2 located in the immediately following row. ing.
According to such a configuration, since it is not necessary to provide the potential line 30, it is possible to reduce the cost, or to improve the pixel aperture ratio corresponding to the installation space. Various advantages are obtained.

However, in this case, when the first and second storage capacitors Cstg1 [i] and Cstg2 [i] are provided as capacitive elements that are intentionally formed, the electro-optical element 13 [ It is necessary to draw some wiring from the first and second electrodes 131 [i] and 132 [i] of i] to the scanning line 3 corresponding to the pixel circuit P1 [i-1] located in the previous row. . For example, as shown in FIG. 8, first and second wirings 3a and 3b extending along the extending direction of the first and second data lines 6a and 6b are provided. Since FIG. 8 is based on FIGS. 4 and 3, if such first and second wirings 3a and 3b are provided, the scanning line 3 included in the pixel circuit P2 located in the previous row is provided. It can be read from FIGS. 8 and 3 (however, the scanning line 3 in the preceding row is not shown in FIG. 3). In addition, the electrical connection between the first and second wirings 3a and 3b and the first and second electrodes 131 and 132 is, for example, the above-described “partially cut off” in the first and second electrodes 131 and 132. This can be realized by using the “missing” portion (this point is also not shown).
However, when such first and second wirings 3a and 3b are provided, there is a new connection between the first and second wirings 3a and 3b and the first and second data lines 6a and 6b. Alternatively, as shown in FIG. 8, the fifth and sixth parasitic capacitances C31 [i] and C32 [i] are generated. The fifth and sixth parasitic capacitances C31 [i] and C32 [i] are new causes that cause potential fluctuations of the first and second electrodes 131 [i] and 132 [i] (that is, that cause crosstalk). (In FIG. 8, the symbol [i] is omitted. In the following description, the symbol [i] is also omitted).

Therefore, in the second embodiment, in order to avoid such a situation, the first and second wirings 3a and 3b, the first and second data lines 6a and 6b, and the first and second electrodes 131 and 132 are arranged. Regarding the arrangement relationship, an appropriate relationship as described below is set.
First, consider the arrangement adjustment of the first and second wirings 3a and 3b so that the capacitance values γ5 and γ6 of the fifth and sixth parasitic capacitors C31 and C32 are as small as possible.
FIG. 9 shows a simulation result for confirming what the capacitance value γ3 becomes when the first wiring 3a shown in FIG. 8 is positioned at each of the positions F, G, H, and I shown in FIG. It is a graph to represent. In FIG. 9, “Position F” represents a case where the first wiring 3a is positioned directly below the first data line 6a, as shown in FIG. 8, and “Position G” represents the first wiring 3a. This represents a case where the left end in FIG. 8 and the right end in FIG. 4 of the first data line 6a are aligned. “Position H” represents the case where the first wiring 3 a is positioned directly below the first slit 132 s of the second electrode 132, and “Position I” represents that the first wiring 3 a forms the slit 132 s. This represents a case where the first shielding portion 132SH is positioned directly below (refer to FIG. 8).

According to FIG. 9, it can be seen that the capacitance value γ5 gradually decreases from Position F to Position I. This is presumably because the physical distance between the first wiring 3a and the first data line 6a increases in this direction.
FIG. 10 is a graph showing a simulation result confirming how the transmittance of the liquid crystal LC changes in accordance with the changes in the Positions F, G, H, and I. It can be seen that the transmittance has a substantially constant value regardless of the formation position of the wiring 3a.

In view of the circumstances as described above, it can be understood that it is preferable to select Position G or later as the formation position of the first wiring 3a because the capacitance value γ3 is preferably as small as possible.
However, regarding Position I, since the position is directly below the first shielding portion 132SH beyond the first slit 132s of the second electrode 132 as described above, the position is provided between the adjacent electro-optical elements 13. Even when viewed from the position where the black matrix BM (see FIG. 8) that can be formed is formed, it is slightly too deep in the formation region of the first electrode 131 and the like. In fact, in such a case, if light reflection or the like occurs in the first wiring 3a, there is a high possibility that image quality will be degraded.
As for Position H, since the position is directly below the first slit 132s of the second electrode 132 as described above, the position is closer to the formation position of the black matrix BM. There is also a possibility that such problems as light reflection occur more remarkably.
From the above, it can be determined that the optimal formation position of the first wiring 3a is Position G. In this case, the capacitance value γ5 is generally 0.6 × 10 ⁻¹⁰ [F / m] (see FIG. 9).

Next, on the premise of the above, the arrangement relationship between the first electrode 131 and the first data line 6a is optimized as in the first embodiment.
FIGS. 11 and 12 are diagrams having the same concept as FIGS. 5 and 6 described above. However, in FIG. 11, a graph of the difference between the capacitance value γ1 of the first parasitic capacitance C11 and the capacitance value γ3 of the third parasitic capacitance C21 is also drawn. In FIG. 11, the dashed-dotted curve is γ3-γ1, and the dashed-dotted curve is γ1-γ3. Further, in FIG. 11, a horizontal line is drawn around approximately 0.6 × 10 ⁻¹⁰ [F / m]. This represents the capacitance value γ5 described above.

From the above, first, in the figure, the point where the one-dot broken line and the horizontal line intersect can be expressed as γ3−γ1 = γ5.
γ1 + γ5 = γ3 (1)
Is established. According to this, the sum of the capacitance values γ1 and γ5 of the first parasitic capacitor C11 and the fifth parasitic capacitor C31 is equal to the value of the capacitance value γ3 of the third parasitic capacitor C21, and therefore the potential of the first data line 6a. When the fluctuation occurs, the influences of the first and fifth parasitic capacitors C11 and C31 and the third capacitor element C21 on the first electrode 131 and the second electrode 132 are equal (the fifth parasitic capacitor C31 is Note that it is electrically connected to the first electrode 131 (see FIG. 7). This is realized by the point indicated by the right circle in FIG. 11, that is, the point where the expression (1) is established. In this case, since the transmittance is maintained at a high level as in the first embodiment (see the circle on the right side in FIG. 12), there is little possibility that such arrangement adjustment affects the image quality.

  As a result of the above consideration, in the second embodiment, the arrangement relationship between the first electrode 131 and the first data line 6a is “Structure Z2” shown in FIG. 11, in other words, the left end of the first electrode 131 in FIG. However, the arrangement relationship is set so that the first data line 6a stops at a position further retracted beyond the position of the right end in FIG. 8 (see FIG. 8).

On the other hand, in the figure, the point where the two-dot broken line and the horizontal line intersect can be expressed as γ1−γ3 = γ5, and the capacitance values γ1, γ3, and γ5 here are respectively the second parasitic capacitance C12. Since the capacitance value γ2, the capacitance value γ4 of the fourth parasitic capacitance, and the capacitance value γ6 of the sixth parasitic capacitance C32 can be replaced (that is, γ1 → γ2, γ3 → γ4, γ5 → γ6, see FIG. 8), γ2 −γ4 = γ6 If this is modified,
γ4 + γ6 = γ2 (2)
Is established. According to this, the sum of the capacitance values γ4 and γ6 of the fourth parasitic capacitance C22 and the sixth parasitic capacitance C32 is equal to the value of the capacitance value γ2 of the second parasitic capacitance C12, and therefore the potential of the second data line 6b. When the fluctuation occurs, the influences of the fourth and sixth parasitic capacitances C22 and C32 and the second capacitance element C12 on the first electrode 131 and the second electrode 132 are equal (the sixth parasitic capacitance C32 is Note that it is electrically connected to the second electrode 132 (see FIG. 7). This is realized by a point with a circle on the left side in FIG. 11, that is, a point where the above expression (2) is established. Also in this case, since the transmittance is maintained at a high level (see the circle on the left side in FIG. 12), there is little possibility that such an arrangement adjustment affects the image quality.

  As a result of the above consideration, in the second embodiment, the arrangement relationship between the first electrode 131 and the second data line 6b is “Structure Z3” shown in FIG. 11, in other words, the right end of the first electrode 131 in FIG. Is set so as to be substantially aligned with the position of the right end of the second data line 6b in FIG. 8 (see FIG. 8).

  As described above, the arrangement relationship between the second electrode 132 and the first data line 6a and the second data line 6b is set as in the first embodiment.

  According to the electro-optical device or the pixel circuit P2 according to the second embodiment as described above, the first and second wirings 3a and 3b in addition to the cost reduction effect due to the non-installation of the potential line 30 described above. The occurrence of crosstalk due to the fifth and sixth parasitic capacitances C31 and C32, which is a concern due to the installation, or adverse effects caused thereby is effectively suppressed. It should be noted that, in the second embodiment, similar to the first embodiment, such an effect can be obtained without causing deterioration of image quality or the like (see FIG. 12).

Although the embodiments according to the present invention have been described above, the electro-optical device or the pixel circuit according to the present invention is not limited to the above-described embodiments, and various modifications can be made.
(1) In the first embodiment, mention is made that both γ1 = γ3 and γ2 = γ4 hold. In the second embodiment, both the above-described expressions (1) and (2) hold. However, the present invention is not limited to such a form.
For example, in the first embodiment, only one of γ1 = γ3 and γ2 = γ4 is established in some cases, or in the second embodiment, either of the expressions (1) and (2) is satisfied. Even if only one of them is established, the present invention falls within that range. Depending on the actual circuit arrangement situation and the like, there is no possibility that there is no need to be particularly concerned about the occurrence of crosstalk caused by one of the first and second data lines 6a and 6b. In this case, it is not necessary to forcefully satisfy both the above-described conditions.
Or, conversely, in the first embodiment, γ1 = γ2 = γ3 = γ4 holds (this point has already been described, see the corresponding section), and in the second embodiment, the expression (1) = The case where the expression (2), that is, γ1 + γ5 = γ3 = γ4 + γ6 = γ2, is also included in the scope of the present invention. According to this, the influence given to the first and second electrodes 131 and 132 is the same by both the first and second data lines 6a and 6b. Therefore, it goes without saying that the above-described crosstalk reduction effect is more effectively achieved.

(2) In each of the above embodiments, a suitable arrangement relationship between the first data line 6a and the like is set while paying attention to the position of the side edge of the first electrode 131. In addition, the following circumstances are supplemented.
That is, in order to avoid the occurrence of crosstalk or the adverse effects caused by it, it is naturally possible to adjust the position of the second electrode 132 instead of the position of the first electrode 131. FIG. 13 shows changes in capacitance values γ1 and γ3 with respect to the first data line 6a of the first and second electrodes 131 and 132 when such adjustment is performed. In FIG. 13, it is assumed that the left end of the first electrode 131 is in “Structure C” in FIG. 4 or FIG. 8 (see also FIG. 14). In FIG. 13, “StructureJ” represents the case where the left end of the second electrode 132 in FIG. 14 and the left end of the first data line 6a are aligned as shown in FIG. 14, and “StructureK”. Represents a case where the left end of the second electrode 132 in FIG. 14 and the right end of the first data line 6a in FIG. 14 are aligned. Further, “StructureM” represents a case where the outermost portion 132MS of the second electrode 132 disappears, and “StructureL” refers to the “StructureM” at the left end of the second electrode 132 in FIG. The case where it is positioned in the middle of the “StructureK” is shown.

According to such an arrangement relationship, as shown in FIG. 13, the capacitance value γ1 related to the first electrode 131 is constantly maintained at a low level, and the capacitance value γ3 related to the second electrode 132 is changed from “StructureJ” to “StructureM”. It will simply decrease towards.
In view of the above, there is room for an effect that is not different from the effect obtained by the first and second embodiments by adjusting the arrangement position of the second electrode 132 (rather, the first embodiment). If FIG. 5 which concerns on FIG. 5 is compared with FIG. 13, the said effect may be show | played more suitably in FIG.
However, according to the arrangement position adjustment of the second electrode 132, for example, the switching position of the alignment state of the liquid crystal LC is changed to the position of the first electrode 131 so as to appear when the outermost portion 132MS disappears in the “Structure M”. It will move to the inside of the formation area. This has a great influence on the quality of the image.
In summary, in the present invention, it is not necessary to positively exclude the aspect of adjusting the arrangement position of the second electrode 132, but if possible, by adjusting the arrangement position of only the first electrode 131, It can be said that it is preferable to deal with the problem of crosstalk.

(3) In each of the embodiments described above, the slits of the second electrode 132 are parallel to each other and arranged at a constant interval, but the present invention is not limited to such a form.
In short, the slit of the second electrode 132 may be formed so that the liquid crystal molecules in the liquid crystal LC are controlled by the oblique electric field between the first electrode 131 and the second electrode 132. For example, each slit of the second electrode 132 may be provided along the extending direction of the scanning line 3, or provided so as to have a predetermined angle with respect to the extending direction of the scanning line 3. May be. Furthermore, there may be a first slit provided with a first angle with respect to the extending direction of the scanning line 3 and a second slit provided with a second angle.

(4) In the first embodiment, the operation of the pixel circuit P1 has been described in stages from [i] to [iii] (this description is naturally valid in the second embodiment as well). In this regard, however, various modes or timings for switching the data potential Vdata and the reference potential GND are assumed.
For example, switching between the data potential Vdata and the reference potential GND may be performed on a frame basis. In this case, until all the pixel circuits P1 shown in FIG. 1 are driven in general, for example, the data potential Vdata is always applied to the first data line 6a and the second data line 6b is always applied to the first data line 6a. This means that the reference potential GND is supplied (V inversion method).
Alternatively, the switching may be performed for each data line (for each column). In this case, during a certain frame period, the data potential Vdata is supplied to the first data line 6a corresponding to a certain pixel circuit P1 (i, j), and the reference potential GND is supplied to the second data line 6b. The reference potential GND is supplied to the first data line 6a corresponding to the adjacent pixel circuit P1 (i, j + 1), the data potential Vdata is supplied to the second data line 6b, and the like (S inversion method).
Alternatively, the switching may be performed for each scanning line (for each row). In this case, when driving a plurality of pixel circuits P1 (i, 1),..., P1 (i, n) located in a certain row during a certain frame period, the data potential is applied to the first data line 6a. The reference potential GND is supplied to Vdata and the second data line 6b. However, when a plurality of pixel circuits P1 (i + 1,1),..., P1 (i + 1, n) located in the next row are driven, That is, the reference potential GND is supplied to the first data line 6a, the data potential Vdata is supplied to the second data line 6b, and the like (H inversion method).
Alternatively, a dot inversion method using both the S inversion method and the H inversion method may be performed.

  In any case, such a change in the mode of switching between the data potential Vdata and the reference potential GND is such that when attention is paid to one specific pixel circuit P1, the first and second data lines 6a corresponding to itself are changed. There is a possibility that potential fluctuations of the data lines other than 1 and 6b may cause a difference in the influence on the first and second electrodes 131 and 132 included in the pixel circuit P1. In determining the capacitance values of the parasitic capacitances (C11, C12, C21, C22, C31, C32) and the relationship thereof, it is preferable to consider such circumstances depending on circumstances.

<Application>
Next, an electronic apparatus to which the electro-optical device 1 according to the above embodiment is applied will be described.
FIG. 15 is a perspective view showing a configuration of a mobile personal computer using the electro-optical device 1 according to the above-described embodiment as an image display device. The personal computer 2000 includes the electro-optical device 1 as a display device and a main body 2010. The main body 2010 is provided with a power switch 2001 and a keyboard 2002.
FIG. 16 shows a mobile phone to which the electro-optical device 1 according to the above embodiment is applied. A cellular phone 3000 includes a plurality of operation buttons 3001, scroll buttons 3002, and the electro-optical device 1 as a display device. By operating the scroll button 3002, the screen displayed on the electro-optical device 1 is scrolled.
FIG. 17 shows a portable information terminal (PDA: Personal Digital Assistant) to which the electro-optical device 1 according to the above embodiment is applied. The information portable terminal 4000 includes a plurality of operation buttons 4001, a power switch 4002, and the electro-optical device 1 as a display device. When the power switch 4002 is operated, various types of information such as an address book and a schedule book are displayed on the electro-optical device 1.

The electronic apparatus to which the electro-optical device according to the present invention is applied includes, in addition to those shown in FIGS. 15 to 17, a digital still camera, a television, a video camera, a car navigation device, a pager, an electronic notebook, electronic paper, a calculator, Examples include a word processor, a workstation, a videophone, a POS terminal, a video player, and a device equipped with a touch panel.

DESCRIPTION OF SYMBOLS 1 ... Electro-optical device, 100 ... Scanning line drive circuit, 200 ... Data line drive circuit, P1, P2 ... Pixel circuit, 13 ... Electro-optical element, 131 ... 1st electrode, 132 ... 2nd Electrode, 3... Scanning line, 30... Potential line, 3 a... First wiring, 3 b... Second wiring, 6 a... First data line, 6 b .. Second data line, Cstg 1, Cstg 2, Cstg 3. ... 1st to 3rd holding capacitor, SW101 ... 1st transistor, SW102 ... 2nd transistor, C11, C12, C21, C22 ... 1st to 4th parasitic capacitance, C31, C32 ... 5th and 6th Parasitic capacitance

Claims (4)

A substrate,
A first electrode formed on the substrate; and a second electrode formed on the first electrode so as to form a laminated structure with the first electrode;
An electro-optical material whose optical characteristics change according to an applied voltage between the first electrode and the second electrode;
A first layer that is formed along a side of each of the first electrode and the second electrode, and is formed as a layer different from the first and second electrodes, and is supplied with the first data potential in the first period. Data lines,
Second data which is formed as a layer different from the first and second electrodes along the other side of each of the first and second electrodes and is supplied with a second data potential in the second period. Lines and,
A first switching element for electrically connecting the first electrode and the first data line;
A second switching element for electrically connecting the second electrode and the second data line;
With
In plan view of the substrate,
At least a portion of the second electrode is formed so as to overlap with the first and second data lines,
One side of the second electrode coincides with a side of the first data line, and
The other side of the second electrode is formed to coincide with the side of the second data line,
Each side of the first electrode is formed so as to be within the width of each of the first data line and the second data line.
An electro-optical device. A set of the first electrode and the second electrode and the first switching element and the second switching element are arranged according to a matrix arrangement on the surface of the substrate; and
A control signal that is formed so as to extend along each row direction of the matrix-like arrangement and that commands a transition between the ON state and the OFF state of the first switching element and the second switching element corresponding to each row is the first switching. A plurality of scanning lines supplied to the element and the second switching element;
One end is electrically connected to the first electrode included in one set of all of the sets, and the other end is a row adjacent to the row to which the one set belongs in the matrix array. A first wiring electrically connected to the scanning line corresponding to
One end is electrically connected to the second electrode included in the one set, and the other end is electrically connected to the scanning line corresponding to the row adjacent to the row to which the one set belongs. A second wiring;
A first storage capacitor provided on the first wiring;
A second storage capacitor provided on the second wiring;
Further comprising
In plan view of the substrate,
The first electrode is formed such that a distance between the first electrode and the first data line is larger than a distance between the first electrode and the second data line.
The electro-optical device according to claim 1, characterized in that. A substrate,
A first electrode formed on the substrate;
A second electrode formed on the first electrode so as to form a laminated structure with the first electrode;
An electro-optic material whose optical properties change according to the applied voltage between the first and second electrodes;
A first data line;
A second data line;
A first switching element that electrically connects the first electrode and the first data line;
A second switching element that electrically connects the second electrode and the second data line;
With
The second electrode is
A portion where the first electrode is interposed between the first data line and the second electrode in the stacking direction;
A portion facing the first data line without interposing the first electrode in the stacking direction;
A portion where the first electrode is interposed between the second data line and the second electrode in the stacking direction;
A portion facing the second data line without interposing the first electrode in the stacking direction;
I have a,
In plan view of the substrate,
The second electrode is
One side thereof coincides with the side of the first data line, and
The other side is formed so as to coincide with the side of the second data line.
An electro-optical device. Comprising an electro-optical device according to any one of claims 1 to 3,
An electronic device characterized by that.

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