JP2002049358A - Electro-optical device and its driving method, and electronic equipment - Google Patents

Abstract

(57) [Object] To provide a display device and an electronic device which can drive a matrix liquid crystal element with low power consumption and consume low power. A column (signal) electrode of a matrix liquid crystal element is divided into two upper and lower parts, and while an upper half row (scanning electrode) is selected, a substantially constant potential is applied to a lower half signal electrode.
While the lower half row (scanning electrode) is selected, by applying an almost constant potential to the upper half signal electrode,
The capacity load hanging on the signal electrode can be reduced, the frequency of charging and discharging the capacity can be reduced, and the power consumption can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electro-optical device such as a matrix type liquid crystal element and an electronic apparatus using the same.

[0002]

2. Description of the Related Art In recent years, electro-optical devices such as liquid crystal display devices have been improved in display quality and have features such as thinness, light weight, and low power consumption. Widely used.
Among the liquid crystal display devices, in a field where high definition display is required, there is a great demand for a matrix drive type liquid crystal display device.

Here, the liquid crystal panels driven by the matrix driving method can be roughly classified into three types: a passive matrix liquid crystal panel, a two-terminal type active matrix liquid crystal panel, and a three-terminal type active matrix liquid crystal panel. Here, configurations of these three types of panels will be briefly described.

FIG. 7 is a perspective view showing a configuration of a part of a passive matrix liquid crystal panel. 10 and 1 in the figure
Reference numeral 1 denotes a pair of substrates, on which a data electrode 101 is formed on a substrate 10 and a scanning electrode 102 is formed on a substrate 11.
A liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11. Here, a portion where the data electrode 101 and the scanning electrode 102 intersect becomes a pixel. Therefore, the pixel forms a pixel capacitance Cp having the liquid crystal layer as a dielectric pair.

FIG. 8 is a perspective view showing a part of a two-terminal type active matrix liquid crystal panel. 10 in the figure
And 11 are a pair of substrates, on which a data line 101 is formed on a substrate 10 and a scanning line 102 is formed on the substrate 11.
Each time the data line 101 and the scanning line 102 intersect, 2
An MIM element 103 formed by forming a metal piece 103a via a thin insulating layer (not shown) on a portion protruding from the data line 101 is provided as a terminal type switch element,
Further, a pixel electrode 104 is provided. A portion of the scanning line 102 overlapping with the pixel electrode 104 is a counter electrode.
A liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11. Here, the MIM element 103 is a capacitor structure itself and has a capacitance Cm, and a counter electrode facing the pixel electrode 104 has a pixel capacitance Cp. Also, the data line 101
And the scanning line 102 also have a parasitic capacitance Cs. Therefore, the capacitance per pixel is Cs + 1 / (1 /
(Cp + 1 / Cm). Note that the scan line 102 may be used as a data line and the data line 101 may be used as a scan line.

FIG. 9 is a perspective view showing a part of a three-terminal type active matrix liquid crystal panel. In the figure, 1
Reference numerals 0 and 11 denote a pair of substrates, which are formed on the substrate 10 so that the data lines 101 and the scanning lines 102 intersect. At each position where the data line 101 and the scanning line 102 intersect, a field-effect thin film transistor (hereinafter abbreviated as TFT) 105 is provided as a three-terminal switch element, and a pixel electrode 104 is further provided. Here, the scanning electrode 102
Are used as gate electrodes for controlling on / off of the TFT 105. The counter electrode 106 is formed on the substrate 11. A liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11.

Therefore, at least a parasitic capacitance Cs exists between the data line 101 and the counter electrode 106. As described above, the data line forms a capacitance with the scanning line and the counter electrode.

Next, the matrix driving method will be briefly described. In order to drive the above-described matrix liquid crystal panel, the scanning lines / scanning electrodes are sequentially selected and a predetermined selection signal is applied. In synchronization with this, the data lines / data electrodes cross the selected scanning lines. A signal potential waveform required to make the pixel at the position have a desired brightness is applied.

This will be described a little more with reference to a passive matrix liquid crystal panel as an example. FIG. N + 3 is a plan view showing an example of the configuration of a passive matrix liquid crystal panel.
16 with symbols x1 to x16 on 0 and 11 respectively
There are formed two data electrodes 101 and twelve scanning electrodes 102 labeled y1 to y12. The number of electrodes in the panel shown in the figure is as small as ten or more, but this is for simplification of the figure, and in practice, it is often several tens to several hundreds.

In FIG. 9, each of the data electrodes x1 to x16 intersects all the scan electrodes y1 to y12. Therefore, when the pixel capacitance per pixel is Cp, the capacitance per signal electrode is 12 Cp.

FIG. 11 is a diagram showing timings of potential waveforms for driving the panel shown in FIG. In the drawing, a potential waveform applied to the scanning electrodes y1 to y4, y11, and y12 and a potential waveform applied to an arbitrary signal electrode xi (i is any one of 1 to 16) are shown.

First, at predetermined time units (hereinafter referred to as one selection period tH), the scanning electrodes y1 are sequentially arranged in the order of y2, y3,.
y12 is selected, and any potential of the selection potential ± Vs is applied. In synchronization with this, the signal potential ± V is applied to the data electrode xi.
Is applied.

That is, the scanning electrode yj (j is any one of 1 to 12) is selected, and the scanning electrode yj and the data electrode xi are selected.
Are turned on, the -V data potential is applied to the data electrode xi when the selection potential applied to the scan electrode yj is + Vs, and the -V data potential is applied to the data electrode xi when the selection potential is -Vs. In order to apply the + V signal potential and turn off the pixel, the selection potential applied to the scan electrode yj is + Vs
In this case, the signal potential of + V is applied to the data electrode xi, and when the selection potential is -Vs, the signal potential of -V is applied to the data electrode xi.

Y2, y3... Y12 in order from the scanning electrode y1.
The period for selecting all the frames up to is called one frame period tFr,
For the selection period of each scan electrode in the next frame period,
Usually, selection potentials of opposite polarity are used. Note that 0 V is applied to the unselected scanning electrodes. The display is performed by driving as described above.

In a two-terminal type active matrix liquid crystal panel and a three-terminal type active matrix liquid crystal panel,
In many cases, the data potential waveform is pulse-width modulated or potential-modulated, but in any case, when the scanning lines are sequentially selected in the same manner as in a passive matrix liquid crystal panel, the data is changed according to the display pattern. The signal potential waveform on the line will change variously.

In a passive matrix liquid crystal panel, for example, the potential on each data electrode changes according to the display pattern, and the electric charge moves in the capacitor 12Cp hanging on each data electrode by one potential change (2 V). Is 12 Cp · 2 V.

Here, assuming that the average number of potential changes due to the display pattern is q, the average current in one field period tFR is 12 Cp · 2V · q / tFR, and the power consumption is 12 Cp · 2V ^ 2. Qq / fFR.

Here, V ^ 2 is the square of the potential, and fFR is the frame frequency, which is the reciprocal of one frame period tFr. Note that the current due to the selection potential is ignored.

Power consumption is generated as described above. Here, when the number of scanning electrodes / scanning lines of the liquid crystal panel is generalized and represented by m, the power consumption is mCp · 2V ^ 2 · q · fFR.
Becomes Therefore, it is understood that the power consumption increases as the number m of the scanning electrodes / scanning lines increases.

This is because the power consumption also occurs in the two-terminal type active matrix liquid crystal panel and the three-terminal type active matrix liquid crystal panel because the data line has a parasitic capacitance and the data potential waveform on the data line changes variously. appear.

As a method for solving this problem, for example, 2
JP-A-11-38427 discloses a terminal type active matrix liquid crystal panel. According to this, by reducing the width of at least one of the two wirings at the intersection of the scanning line and the signal line, the area of the intersection of the two wirings is reduced, thereby reducing the parasitic capacitance formed. Power consumption is reduced.

[0022]

However, with this method alone, display unevenness or the like occurs due to an increase in wiring resistance due to excessively narrow wiring, and image quality deteriorates. Therefore, there is a limit to the reduction in power consumption.

[0023]

In order to solve the above-mentioned problems, an electro-optical device according to the present invention comprises a plurality of first scanning electrodes and a plurality of second scanning electrodes formed on a pair of substrates sandwiching an electro-optical material. Scan electrodes, a plurality of first data electrodes intersecting with the first plurality of scanning electrodes, and a plurality of second data electrodes intersecting with the second plurality of scanning electrodes, Electro-optics in which the first and second scan electrodes are sequentially selected for each predetermined selection time unit, and a data potential waveform corresponding to an image to be displayed is applied to the data electrodes crossing the selected scan electrodes. A predetermined potential is applied to the second data electrode during a period when the first scan electrode is selected, and the first data is applied during a period when the second scan electrode is selected. A predetermined potential is applied to the electrode.

According to the present invention, the total pixel capacitance formed by each of the two data electrodes and the scan electrode group is half that of the conventional configuration.
Also, during a period in which one of the scan electrode groups is sequentially selected, a constant voltage can be applied to the signal electrode group that intersects with the other scan electrode group, and the capacitance created by this data electrode group is filled. There is no power consumption due to discharging. Therefore, the power consumption can be reduced to, for example, about 1/4 of the conventional technology.

Also, a plurality of first scanning lines and a plurality of second scanning lines formed on a pair of substrates sandwiching the electro-optical material, and a plurality of the plurality of scanning lines intersecting the first plurality of scanning lines. A first data line, a plurality of second data lines intersecting the second plurality of scanning lines, and pixel electrodes provided in a matrix corresponding to intersections of the scanning lines and the data lines And a switching element, wherein the first and second scanning lines are sequentially selected for each predetermined selection time unit, and data corresponding to an image to be displayed is provided on the data line intersecting the selected scanning line. An electro-optical device to which a potential waveform is applied, wherein a predetermined potential is applied to the second data line during the period in which the first scanning line is selected, and the second scanning line is selected. In the period, a predetermined potential is applied to the first data line. And butterflies.

According to the present invention, the total pixel capacity formed by each two data lines and scanning lines is half that of the conventional configuration. Also,
During a period in which one scanning line group is sequentially selected, a constant voltage can be applied to the data electrode group that intersects the other scanning line group, and the capacity created by this data line group is charged and discharged. No power consumption. Therefore, the power consumption can be reduced to, for example, about 1/4 of the conventional technology.

Further, the electro-optical device is characterized in that the switching element is a two-terminal type active matrix element.

Further, the electro-optical device is characterized in that the switching element is a three-terminal type active matrix element.

The method of driving an electro-optical device according to the present invention includes the steps of: forming a plurality of first scan electrodes and a plurality of second scan electrodes formed on a pair of substrates sandwiching the electro-optical material; A driving method for an electro-optical device, comprising: a plurality of first data electrodes intersecting the scan electrodes; and a plurality of second data electrodes intersecting the second plurality of scan electrodes. The first and second scan electrodes are sequentially selected for each predetermined selection time unit, and a data potential waveform corresponding to an image to be displayed is applied to the data electrodes crossing the selected scan electrodes, and Applying a predetermined potential to the second data electrode during a period in which the scanning electrode is selected, and applying a predetermined potential to the first data electrode during a period in which the second scanning electrode is selected. It is characterized by.

According to the present invention, power consumption can be reduced as in the above-described electro-optical device.

Further, a plurality of first scanning lines, a plurality of second scanning lines, and a plurality of intersections intersecting with the first plurality of scanning lines are formed on a pair of substrates sandwiching the electro-optical material. A first data line, a plurality of second data lines intersecting the second plurality of scanning lines, and pixel electrodes provided in a matrix corresponding to intersections of the scanning lines and the data lines And a driving method for an electro-optical device having a switching element, wherein the first and second scanning lines are sequentially selected for each predetermined selection time unit, and the data lines that intersect with the selected scanning lines are: A data potential waveform corresponding to an image to be displayed is applied, and a predetermined potential is applied to the second data line during a period in which the first scanning line is selected, and the second scanning line is selected. Applying a predetermined potential to the first data line during the And it features.

According to the present invention, power consumption can be reduced as in the above-described electro-optical device.

Further, the driving method of the electro-optical device is as follows.
The switching element is a two-terminal type active matrix element.

Further, the driving method of the electro-optical device is as follows.
The switching element is a three-terminal active matrix element.

The electronic apparatus according to the present invention includes the above-described electro-optical device,
A display processing device for controlling the electro-optical device, and a power supply circuit for supplying power to the electro-optical device and the display processing device are provided.

According to the present invention, an electronic device with low power consumption can be provided.

[0037]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 1 is a plan view showing a configuration of a passive matrix liquid crystal element 100 used in the present invention.

In the figure, reference numerals 10 and 11 denote substrates. On the substrate 10, there are formed 16 upper signal electrodes labeled u1 to u16 and lower electrodes labeled 11 to 116, respectively. Scan electrodes with symbols y1 to y12 are formed on 11.

The upper data electrodes u1 to u16 intersect the scan electrodes y1 to y6 to form pixels, and the lower data electrodes 11 to 116 intersect the scan electrodes y7 to y12 to form pixels. A liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11. Although the number of electrodes of the panel shown in the figure is as small as ten or more, this is for simplification of the figure, and in practice, it is often several tens to several hundreds.

FIG. 2 is a diagram showing timings of potential waveforms for driving the liquid crystal panel of FIG. In the figure, potential waveforms applied to scan electrodes y1 to y4, y11 and y12, and arbitrary upper data electrode ui and lower data electrode li (i
Indicates a potential waveform applied to any one of 1 to 16).

Hereinafter, the driving method of this embodiment will be described.

First, every one selection period tH, the scan electrode y1
Y6, y3,..., Y6 in this order, and the selection potential ± Vs
Is applied. In synchronization with this, one of the signal potentials ± V is applied to the upper data electrode ui.

That is, the scanning electrode yj (j is any one of 1 to 6) is selected, and the scanning electrode yj and the upper data electrode u are selected.
To turn on the pixel at which i crosses, the scan electrode yj
When the selection potential applied to the pixel is + Vs, the -V signal potential is applied to the upper data electrode ui, and when the selection potential is -Vs, the + V data potential is applied to the upper data electrode ui to turn off the pixel. When the selection potential applied to the scanning electrode yj is + Vs, a + V data potential is applied to the upper data electrode ui, and when the selection potential is -Vs, a -V data potential is applied to the upper data electrode ui. I do.

On the other hand, during the period in which the scanning electrodes y1 to y6 are selected, a constant potential of 0 V is applied to the lower data electrode.
Is applied.

Next, every one selection period tH, the scan electrode y7
Y2, y3... Y12 in this order, and the selection potential ± V
s is applied. In synchronization with this, one of the data potentials ± V is applied to the lower potential electrode li.

That is, the scanning electrode yj (j is any one of 7 to 12) is selected, and in order to turn on the pixel where the scanning electrode yj and the lower data electrode li intersect, the scanning electrode yj is required.
When the selection potential applied to j is + Vs, the data potential of -V is applied to the lower data electrode li. When the selection potential is -Vs, the data potential of + V is applied to the lower data electrode li.
To turn off the pixel, the data potential of + V is applied to the lower data electrode li when the selection potential applied to the scanning electrode yj is + Vs, and to the lower data electrode li when the selection potential is −Vs. A data potential of -V is applied. On the other hand, a constant voltage of 0 V is applied to the upper data electrode during the period in which the scan electrodes y7 to y12 are selected.

The above driving is repeated.

Next, the effect of this will be described. First,
The number of all scanning electrodes (generally m
Of the data electrodes, the capacitance hanging from each data electrode is (m / 2) Cp, where Cp is the capacitance of one pixel. Also,
The potential waveform on the lower data electrode is constant during a half of one field period, and the number of times of charging and discharging the capacitance hanging on each data electrode is reduced by half.

Therefore, as compared with the conventional driving method,
Since the potential switching is performed with half the frequency with respect to the half capacitive load, the power consumption of the panel can be reduced to about ４.

Here, an example of driving for selecting the scanning electrodes one by one has been described. However, in the passive matrix driving, there is a driving method for selecting the scanning electrodes at the same time for every k electrodes. A method of supplying one of the data potentials of the k + 1 value to the data electrode (multi-line
Selection method: MLS method) is known. This ML
The present invention is applicable to the S method. That is, for example, when performing the MLS method of three simultaneous selection, the scanning electrodes to be simultaneously selected are
y1 to y3, y4 to y6, y7 to y9, y10 to y12
When the scan electrodes y1 to y3 and y4 to y6 are selected, one of the four data potentials is applied to the upper data electrode, a fixed potential is applied to the lower data electrode, and the scan electrodes y7 to y9 are applied. When y10 and y12 are selected, 4
Apply one of the data voltages of the value to the lower data electrode,
A constant potential may be applied to the upper data electrode.

[Second Embodiment] Two-terminal type active
Another embodiment using a matrix liquid crystal element as an example will be described.

FIG. 3 is a plan view showing the structure of a two-terminal type active matrix liquid crystal element.

In the drawing, reference numerals 10 and 11 denote substrates. On the substrate 10, 16 upper data lines labeled u1 to u16 and lower data lines labeled 11 to 116 are formed, respectively. On the substrate 11, scanning lines with symbols y1 to y12 are formed.

Then, a pixel electrode 104 and a two-terminal switching element 103 are formed at the intersections of the upper data lines u1 to u16 and the scanning lines y1 to y6, and the lower data lines 11 to 11 are formed.
The pixel electrode 104 and the two-terminal switching element 103 are formed at the intersections of the scanning lines 6 and the scanning lines y7 to y12. A portion of the scan line that overlaps the pixel electrode 104 in a plane function as a counter electrode. . A liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11.

A method of driving the liquid crystal panel of FIG. 3 will be described with reference to FIG.

The application of an arbitrary voltage between the data potentials ± V is referred to as the application of a potential-modulated potential, and the application of any one of the potential + V and the potential −V within one selection period. To apply the voltage with the time set to an arbitrary ratio is referred to as applying the pulse-width-returned potential.

First, every one selection period tH, y2, y3... Y6 are sequentially selected from the scanning line y1, and any one of the selection potentials ± Vs is applied. In synchronization with this, a potential modulated or pulse width modulated potential is applied to the upper data electrode ui.

On the other hand, during the period in which the scanning lines y1 to y6 are selected, a constant potential is applied to the lower data line.

Next, every one selection period tH, the scan electrode y7
Y2, y3... Y12 in this order, and the selection potential ± V
s is applied. In synchronization with this, a potential modulated or pulse width modulated potential is applied to the lower data electrode li.

On the other hand, during the period in which the scanning lines y7 to y12 are selected, a constant potential is applied to the upper data line.

The above driving is repeated.

The effect of this is the same as that of the first embodiment. Since the parasitic capacitance hanging on each data electrode ui, li is halved, and the frequency of potential switching is also halved, the power consumption of the panel can be reduced to about ４. I can do it.

[Third Embodiment] A three-terminal type active
Another embodiment using a matrix liquid crystal element as an example will be described.

FIG. 4 is a plan view showing a configuration of a three-terminal type active matrix liquid crystal element.

In the figure, reference numerals 10 and 11 denote substrates, on the substrate 10 are formed scanning lines labeled y1 to y12, respectively, and 16 upper data lines labeled u1 to u16, respectively. Lower data lines labeled with symbols l1 to 116 are formed, and scanning lines labeled with symbols y1 to y12 are formed on the substrate 11.

The upper data lines u1 to u16 intersect with the scanning lines y1 to y6, and the lower data lines 11 to 116 intersect with the scanning lines y7 to y12. In addition, a three-terminal switch element 105 and a pixel electrode 104 are formed at each intersection, and each scanning line 102 is a gate electrode that performs on / off control of each three-terminal switch element 105. A counter electrode 106 is formed on the substrate 11, and a liquid crystal layer (not shown) is sandwiched between the substrates 10 and 11.

A method of driving the liquid crystal panel of FIG. 4 will be described with reference to FIG.

First, for each one selection period tH, y2, y3... Y6 are sequentially selected from the scanning line y1, and the gate potential Vg is applied. In synchronization with this, a potential modulated potential is applied to the upper data line ui. On the other hand, the scanning lines y1 to y6
During this period, a constant potential is applied to the lower data line.

Next, every one selection period tH, y2, y3... Y12 are sequentially selected from the scanning line y7, and the gate potential Vg is selected.
Is applied. In synchronization with this, a potential modulated potential is applied to the lower data line li.

On the other hand, during the period in which the scanning lines y7 to y12 are selected, a constant potential is applied to the upper data line.

The above driving is repeated.

The effect of this is the same as that of the first embodiment. The parasitic capacitance between each data line ui, li and the common electrode is reduced by half, and the frequency of potential switching is also reduced by half, so that the power consumption of the panel is reduced to about 1/4. You can do it.

[Fourth Embodiment] The present embodiment is directed to the first embodiment.
The present invention relates to a liquid crystal device that performs the method for driving a liquid crystal element described in the third to third embodiments, and FIG. 3 is a block diagram showing an example of the structure. 6 includes a display information output source 201, a display information processing circuit 202, a liquid crystal module 203, and a power supply circuit 204. The liquid crystal module 203 includes the liquid crystal panel 203 described in the first to third embodiments.
0 and a scanning electrode driving circuit 2031 for sequentially selecting and driving the scanning electrodes / scanning lines of the liquid crystal panel 2030 and the liquid crystal panel 203
A data electrode driving circuit 2032 for driving the upper data electrode / data line 0 and a data electrode driving circuit 2033 for driving the lower data electrode / data line.

The display information processing circuit 202 supplies the control signal group 20 necessary for driving to the scan electrode driving circuit 2031.
21 and the data electrode driving circuit 2
A control signal group including display data necessary for driving and 2022 and 2023 are supplied to 032 and 2033. And
The power supply circuit 204 supplies power required by the display information output source 201, the display information processing circuit 202, the liquid crystal module 203, and the like.

Here, while the upper half of the liquid crystal panel 2030 is sequentially selected, the display information processing circuit 202 does not send display data to the data electrode driving circuit 2033 and enters a standby state. That is, the data electrode drive circuit 2033 keeps a state in which a constant potential is applied to the lower data electrode of the liquid crystal panel 2030. Similarly, while the lower half of the liquid crystal panel 2030 is sequentially selected, the display information processing circuit 202 is selected.
Is in a standby state without sending display data to the data electrode drive circuit 2032. That is, the data electrode drive circuit 2032 keeps a state in which a constant potential is applied to the upper data electrode of the liquid crystal panel 2030.

Thus, data electrode driving circuit 2032
And 2033 operate only one, the other does not operate and consumes no power. Therefore, as described in the first to third embodiments, the power consumption of the liquid crystal panel can be significantly reduced, and the power consumption of the liquid crystal display device can also be reduced.

As the electronic equipment having the liquid crystal display device as a constituent element, a portable terminal, a personal computer, a television, a liquid crystal projector, a device having a touch panel, and the like can be given.

Although the present invention has been described with reference to the drawings based on several embodiments, the present invention is not limited to these embodiments, and may be embodied in various forms. It is possible. In particular, the dividing position of the data electrode divided into two vertically does not necessarily need to be near the center. For example, when the number of scanning electrodes / the number of scanning lines is about 100,
It may be divided up and down by about five. Then, in the case where the content can be displayed in about 25 rows, the scanning is repeated by only the upper 25 scanning electrodes / scanning lines to display the image, and the lower 75 lines are completely stopped, thereby further reducing power consumption. I can do it. Of course, 100 rows can be displayed by scanning the top 25 rows and then the bottom 756 rows as needed.

The above description has been made on the case where liquid crystal is used as the electro-optical material. However, the present invention can be applied to electro-optical devices using other electro-optical materials, such as electroluminescence and plasma displays. is there.

The liquid crystal display device and the electronic apparatus according to the present invention are not limited to those described in the fourth embodiment, but
It includes various electronic devices including at least the liquid crystal element according to the present invention.

[0082]

According to the electro-optical device to which the present invention is applied, the power consumption for driving the liquid crystal element can be reduced by reducing the capacitive load hanging on the data electrodes and further reducing the frequency of charge and discharge for the capacitive load. Can be reduced.

The electro-optical device according to the present invention can achieve low power consumption, and the electronic equipment using the electro-optical device according to the present invention can reduce power consumption.

[Brief description of the drawings]

FIG. 1 is a plan view of a liquid crystal element according to a first embodiment of the present invention.

FIG. 2 is a timing chart of potential waveforms for explaining driving according to the first embodiment and the second embodiment of the present invention.

FIG. 3 is a plan view of a liquid crystal element according to a second embodiment of the present invention.

FIG. 4 is a plan view of a liquid crystal device according to a third embodiment of the present invention.

FIG. 5 is a timing chart of potential waveforms for explaining driving according to the third embodiment of the present invention.

FIG. 6 is a block diagram of a liquid crystal device according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view of a part of a conventional liquid crystal panel.

FIG. 8 is a perspective view of a part of another liquid crystal panel of the related art.

FIG. 9 is a perspective view of a part of another conventional liquid crystal panel.

FIG. 10 is a plan view of a conventional liquid crystal panel.

FIG. 11 is a plan view of a conventional liquid crystal panel.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Substrate 11 ... Substrate 101 ... Data electrode 102 ... Scanning electrode 103 ... Two-terminal switch element (MIM element) 103a ... Metal piece 104 ... Pixel electrode 105 ... Three-terminal switch element (field-effect thin film transistor, TFT) 106: Counter electrode 107: Intersection between electrodes y1 to y12: Scanning electrodes x1 to x16, u1 to u16, l1 to 116: Data Electrode 201: display information output source 202: display information processing circuit 2021: control signal group required for driving scan electrode drive circuit 2031 2022: control signal group required for drive of data electrode drive circuit 2032 2023 ..The control signal group 203 required for driving the data electrode drive circuit 2033 203... The liquid crystal module 2030... The liquid crystal panel 2031... The scan electrode drive circuit 20. 32 data electrode drive circuit 2033 data electrode drive circuit 204 power supply circuit

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G09G 3/20 623 G09G 3/20 623X 623Y F-term (Reference) 2H093 NA10 NA22 NA31 NA43 NA56 NA79 NC34 NC38 ND39 NE07 5C006 AB05 AC02 AF41 BB16 BB17 BC03 BC06 BC07 BC13 BC23 EC05 EC13 FA37 FA47 5C080 AA10 BB05 DD26 EE32 FF09 JJ02 JJ04 JJ06 KK02 KK07 KK43

Claims (9)

[Claims] A plurality of first scan electrodes and a plurality of second scan electrodes formed on a pair of substrates sandwiching the electro-optical material, and a plurality of first scan electrodes intersecting with the first plurality of scan electrodes. A first data electrode; and a plurality of second data electrodes intersecting the second plurality of scan electrodes, wherein the first and second scan electrodes are sequentially selected for each predetermined selection time unit. An electro-optical device in which a data potential waveform according to an image to be displayed is applied to the data electrodes that intersect with the selected scan electrode, wherein the period in which the first scan electrode is selected is An electro-optical device, wherein a predetermined potential is applied to a second data electrode and a predetermined potential is applied to the first data electrode during a period when the second scanning electrode is selected. 2. A plurality of first scanning lines, a plurality of second scanning lines, and a plurality of intersections intersecting with the first plurality of scanning lines formed on a pair of substrates sandwiching the electro-optical material. First
, A plurality of second data lines intersecting the second plurality of scanning lines, pixel electrodes provided in a matrix corresponding to the intersections of the scanning lines and the data lines, and switching. The first and second scanning lines are sequentially selected for each predetermined selection time unit, and a data potential waveform corresponding to an image to be displayed is provided on the data line intersecting the selected scanning line. Is applied, a predetermined potential is applied to the second data line during a period when the first scanning line is selected, and a period during which the second scanning line is selected is An electro-optical device, wherein a predetermined potential is applied to the first data line. 3. The electro-optical device according to claim 2, wherein the switching element is a two-terminal type active matrix element. 4. The electro-optical device according to claim 3, wherein the switching element is a three-terminal type active matrix element. 5. A plurality of first scanning electrodes and a plurality of second scanning electrodes formed on a pair of substrates sandwiching an electro-optical material, and a plurality of intersections between the first plurality of scanning electrodes and the plurality of scanning electrodes. A method for driving an electro-optical device having a first data electrode and a plurality of second data electrodes intersecting with the second plurality of scan electrodes, wherein the first and second scan electrodes are arranged in a predetermined manner. Select sequentially for each selection time unit, apply a data potential waveform according to an image to be displayed to the data electrode that intersects with the selected scan electrode, and a period in which the first scan electrode is selected is A predetermined potential is applied to the second data electrode, and a predetermined potential is applied to the first data electrode during a period when the second scan electrode is selected. Method. 6. A plurality of first scanning lines, a plurality of second scanning lines, and a plurality of intersections intersecting with the first plurality of scanning lines formed on a pair of substrates sandwiching the electro-optical material. First
, A plurality of second data lines intersecting the second plurality of scanning lines, pixel electrodes provided in a matrix corresponding to the intersections of the scanning lines and the data lines, and switching. A driving method of the electro-optical device having the elements, wherein the first and second scanning lines are sequentially selected for each predetermined selection time unit, and displayed on the data lines intersecting the selected scanning lines. A data potential waveform corresponding to an image to be applied is applied, and a period during which the first scanning line is selected is a period during which a predetermined potential is applied to the second data line, and the second scanning line is selected. Wherein a predetermined potential is applied to the first data line. 7. A method for driving an electro-optical device, wherein the switching element according to claim 6 is a two-terminal type active matrix element. 8. A method for driving an electro-optical device, wherein the switching element according to claim 6 is a three-terminal active matrix element. 9. An electro-optical device according to claim 1, further comprising: a display processing device for controlling said electro-optical device; and a power supply circuit for supplying power to said electro-optical device and said display processing device. Electronic equipment.