JP2004258485A - Electrooptical device, polarity inversion driving method for electrooptical device, and electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce power consumption by polarity inversion driving suitable for higher definition of display. <P>SOLUTION: Carried out the polarity inversion driving wherein: a plurality of data lines are divided by (m) (m: a natural number of ≥2) to prescribe a plurality of blocks; data signals having the same polarity are outputted for the same block and data signals having the opposite polarities are outputted for mutually adjacent blocks; and the blocks are regarded as inversion units and the polarities of the data signals are inverted by specified periods. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electro-optical device, a method for driving a polarity inversion of an electro-optical device, and an electronic apparatus.
[0002]
[Prior art]
Conventionally, an active matrix type electro-optical device using time division driving has been known. Time-division driving is a technique for time-dividing a time-series signal output from a higher-level circuit such as a driver IC and distributing the signals to corresponding data lines. This is advantageous in securing the pitch. For example, Patent Documents 1 and 2 disclose a dot inversion driving method in this type of liquid crystal display device. The former discloses that in order to realize complete dot inversion driving, the number of time divisions is set to an odd number, and voltages of opposite polarity are alternately applied to adjacent dots in one line. The latter discloses that data lines supplied with data signals of opposite polarities are short-circuited in a blanking period of one horizontal scanning period in order to reduce power consumption. Further, Patent Document 3 discloses that in a liquid crystal display device, a driving element for precharging is provided for each data line, and a data signal is supplied to the data line after precharging the data line at a predetermined timing. Have been.
[0003]
[Patent Document 1]
JP-A-11-327518 [Patent Document 2]
JP 2001-134245 A [Patent Document 3]
JP-A-2000-356978.
[0004]
[Problems to be solved by the invention]
However, while dot inversion driving is advantageous in achieving high image quality, it has a problem of increasing power consumption because the number of times of inverting the polarity of a data signal increases. Such a problem of power consumption becomes more remarkable as display definition becomes higher.
[0005]
An object of the present invention is to provide a novel polarity inversion drive suitable for high definition display.
[0006]
Another object of the present invention is to reduce power consumption in polarity inversion driving.
[0007]
[Means for Solving the Problems]
In order to solve such a problem, a first invention includes a plurality of scanning lines, a plurality of data lines, a plurality of electro-optical elements provided corresponding to intersections of the scanning lines and the data lines, A plurality of blocks are defined by dividing the data line into m lines (m is a natural number of 2 or more), data signals having the same polarity are output to the same block, and blocks having the opposite polarity are output between adjacent blocks. Provided is an electro-optical device having a data line driving circuit that outputs a data signal and performs polarity inversion driving for inverting the polarity of the data signal every predetermined period with a block as an inversion unit.
[0008]
According to a second aspect of the present invention, when a time-series signal output to a certain output line is time-divided, data signals are sequentially output to each of k (k is a natural number of 2 or more) data lines. Provided is an electro-optical device that performs split driving. This electro-optical device includes a plurality of scanning lines, a plurality of data lines, a plurality of electro-optical elements provided corresponding to intersections of the data lines and the scanning lines, and a plurality of data lines m (m is k By dividing each block, a plurality of blocks are defined, a data signal of the same polarity is output to the same block, and a data signal of the opposite polarity is output between blocks adjacent to each other. A data line driving circuit that performs polarity inversion driving for inverting the polarity of a data signal using a block as an inversion unit for each period.
[0009]
Here, in the second invention, the data line driving circuit has a plurality of selection switches provided corresponding to each of the k data lines, and the k data lines are connected through the selection switches. It is preferable that they are commonly connected to a higher-order output line to which a time-series signal is supplied. In this case, it is desirable that the selection switches be sequentially turned on while offsetting each other within a predetermined period.
[0010]
In the first or second aspect, when the block is a data line group of m data lines, the data line drive circuit performs V line inversion drive using the data line group as an inversion unit as polarity inversion drive. Is preferred. Further, the block may be defined by dividing a plurality of scanning lines into n (n is a natural number) lines. In this case, it is preferable that the data line drive circuit performs block inversion drive in units of blocks as the polarity inversion drive. When one pixel is composed of three dots of red, blue and green, m is preferably an integer multiple of three.
[0011]
Further, in the first or second invention, before inverting the polarity of the data signal, a reset circuit for short-circuiting the data lines to which the data signal of the opposite polarity has been output may be further provided. Further, instead of the reset circuit or in addition to the reset circuit, a precharge circuit for precharging the data line to a predetermined voltage before inverting the polarity of the data signal may be further provided.
[0012]
According to a third aspect, there is provided an electronic apparatus on which the electro-optical device according to the first or second aspect is mounted.
[0013]
A fourth invention provides a polarity inversion driving method for an electro-optical device having a plurality of scanning lines, a plurality of data lines, and a plurality of electro-optical elements provided corresponding to intersections of the scanning lines and the data lines. I do. This driving method defines a plurality of blocks by dividing a plurality of data lines into m (m is a natural number of 2 or more) lines, outputs data signals of the same polarity to the same block, and adjoins each other. And a second step of inverting the polarity of the data signal every predetermined period using the block as an inversion unit.
[0014]
A fifth invention has a plurality of scanning lines, a plurality of data lines, and a plurality of electro-optical elements provided corresponding to the intersections of the scanning lines and the data lines, and when a signal is output to a certain output line. A polarity inversion driving method for an electro-optical device that sequentially outputs a data signal to each of k (k is a natural number of 2 or more) data lines by time-sharing a series signal is provided. In this driving method, a plurality of data lines are divided every m (m is an integral multiple of k) to define a plurality of blocks, output data signals of the same polarity to the same block, and adjoin each other. And a second step of inverting the polarity of the data signal every predetermined period using the block as an inversion unit.
[0015]
Here, in the fourth or fifth invention, the block may be a data line group composed of m data lines, and the block may include a plurality of scanning lines that are arranged every n (n is a natural number). It may be defined by dividing. Further, in the fourth or fifth aspect, when one pixel is composed of three dots of red, blue, and green, it is preferable that m is an integral multiple of three.
[0016]
In the fourth or fifth aspect, before performing the polarity inversion of the data signal, a third step of short-circuiting the data lines to which the data signal of the opposite polarity has been output may be further provided. Further, before performing the polarity inversion of the data signal, a fourth step of precharging the data line to a predetermined voltage may be further provided.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
FIG. 1 is a block diagram of the electro-optical device according to the present embodiment. The display unit 1 is an active matrix type panel that drives liquid crystal by a switching element such as a TFT (thin film transistor). In the display unit 1, N scanning lines Y1 to YN extending in the X direction (row direction) and M data line groups X1 to XM extending in the Y direction (column direction) cross each other. The electro-optical elements 2 for M dots × N lines are arranged two-dimensionally (in a matrix) corresponding to these intersections. In the present embodiment, in order to enable color display on the display unit 1, one pixel P, which is the minimum display unit of an image, is composed of three dots of R (red), G (green), and B (blue). I have. Therefore, pixels P corresponding to (M dots / 3) × N lines exist on the display unit 1. In the following description, when a specific pixel P present on the display unit 1 is specified, subscripts 1 to M of the data line X that specifies the position of the display unit 1 in the X direction and scanning that specifies the position in the Y direction. Expressed using the subscript directions 1 to N of the line Y, the upper left of the display unit 1 is set as a reference point (1, 1), and the lower right is set as (M / 3, N). For example, for the pixel row corresponding to the uppermost scanning line Y1, P (1,1), P (2,1), (3,1),..., P (M / 3,1) It becomes.
[0018]
FIG. 2 is an equivalent circuit diagram of the electro-optical element 2. One electro-optical element 2 includes a TFT 21 serving as a switching element, a liquid crystal capacitor 22, and a storage capacitor 23. The source of the TFT 21 is connected to one data line X (X indicates an arbitrary data line), and the gate is connected to one scanning line Y (Y indicates an arbitrary scanning line). Regarding the electro-optical elements 2 arranged in the same column, the sources of the respective TFTs 21 are connected to the same data line. Further, regarding the electro-optical elements 2 arranged in the same row, the gates of the respective TFTs 21 are connected to the same scanning line Y. The drain of the TFT 21 is commonly connected to a liquid crystal capacitor 22 and a storage capacitor 23 provided in parallel. The liquid crystal capacitor 22 includes a pixel electrode 22a, a counter electrode 22b, and a liquid crystal (liquid crystal layer) sandwiched between the electrodes 22a and 22b. The storage capacitor 23 is formed between the pixel electrode 22a and a common capacitor electrode (not shown), and is supplied with the voltage Vcs. The storage capacitor 23 suppresses leakage of electric charges stored in the liquid crystal. A data signal supplied from the data line X is applied to the pixel electrode 22a via the TFT 21 as a voltage with polarity. The polarity of the data signal is defined based on the direction of the electric field acting on the liquid crystal layer, in other words, the polarity of the voltage applied to the liquid crystal layer. For example, in a driving method (so-called common DC) in which a DC voltage LCOM is applied to the counter electrode 22b side, a higher voltage side than this voltage LCOM is used as a positive (+) data signal and a lower voltage side is used as a negative (−) data signal. ).
[0019]
The control circuit 5 synchronously controls the scanning line driving circuit 3 and the data line driving circuit 4 based on external signals such as a vertical synchronizing signal Vs, a horizontal synchronizing signal Hs, and a dot clock signal DCLK input from a host device (not shown). I do. The scanning line driving circuit 3 mainly includes a shift register, an output circuit, and the like. By outputting a scanning signal to each of the scanning lines Y1 to YN, the scanning lines Y1 to YN are output every one horizontal scanning (1H) period. YN is selected in order. As a result, the pixel rows to which data is to be written are sequentially selected, and the written data is held for one frame (1F).
[0020]
The data line driving circuit 4 cooperates with the scanning line driving circuit 3 to output data to be supplied to a pixel row to which data is to be written, to the data lines X1 to XM. The driver IC 41 in the data line driving circuit 4 includes main circuits such as a shift register, a line latch circuit, a DA converter, and an output circuit. The driver IC 41 simultaneously outputs the data for the pixel row in which the data is to be written this time and the dot sequential latching of the data for the pixel row in which the data is to be written next time. That is, in a certain 1H period, M data (data in the next 1H period) corresponding to the number M of the data lines X are sequentially latched. In the next 1H period, the latched data is analog-converted into a voltage level with polarity, and then output to output lines DO1 to DOi via output pins PIN1 to PINi of the driver IC 41.
[0021]
In the present embodiment, a time division driving method is used to reduce the number of output pins of the driver IC 41 and secure a pitch between adjacent pins. Therefore, the upper output lines DO1 to DOi and the lower data lines X1 to XM have a one-to-many connection relationship. That is, the data lines X1 to XM are grouped every k lines, and each group is connected to one output line DO. In the present embodiment, as an example, k = 6, that is, one group is formed by six data lines X, but the present invention is not limited to this. The preceding driver IC 41 outputs data signals to be supplied to the respective data lines X forming one group in time series, while the subsequent time division circuit 43 performs time division on the time series signals. Are sequentially output to each of the six data lines X in the same group.
[0022]
As shown in FIG. 4, the time division circuit 43 divides a group of six selection switches provided corresponding to each data line X (for example, data lines X1 to X6) forming one group into an output pin PIN. Have for the number. Each selection switch is provided between the data line X and the upper output line DO, and is controlled to be conductive by one of the selection signals SS1 to SS6 generated in the control circuit 5. These selection signals SS1 to SS6 define a period during which each selection switch in the same group is turned on, and are synchronized with a time-series signal output from the driver IC 41.
[0023]
Note that the driver IC 41 is mounted on the panel on which the display unit 1 is formed, but the time division circuit 43 is preferably formed integrally with the panel using low-temperature polysilicon in order to reduce costs.
[0024]
FIG. 3 is a timing chart of the time division driving. In the present embodiment (k = 6), six data lines X are commonly connected below one output line DO. Therefore, it is necessary to output a data signal for two pixels (ie, six dots) from one output line DO in a time-series manner for each 1H period. Hereinafter, the output line DO1 will be described as an example, but the other output lines DO2,..., DOi are also performed simultaneously and in parallel by the same process, and the description thereof will be omitted.
[0025]
First, since the uppermost scanning line Y1 is selected in the first 1H period, data to be written to the output line DO1 is the pixels P (1,1) and P (2,1). From the driver IC 41 to the output line DO1, R (1,1), G (1,1), B (1,1), R (2,1), G (2,1), B (2,1) ) Are continuously output in a time series. In synchronization with this signal output, the selection signals SS1 to SS6 exclusively and sequentially become H level (high level). Therefore, in each group of the time division circuit 43, the six selection switches are sequentially turned on while offsetting each other. As a result, the time-series signal output from the driver IC 41 is time-divided into six, and becomes a data signal for one dot, which is sequentially allocated to the corresponding data lines X1 to X6. Then, the data lines X1 to X6 are charged in accordance with the voltage level of the allocated data signal, and data is written to the electro-optical element 2 corresponding to the pixels (1, 1) and (2, 1). The data written this time is held until one frame period elapses and the next writing is performed.
[0026]
Since the second scanning line Y2 is selected in the next 1H period, the data to be written to the output line DO1 is from the pixels P (1,1) and P (2,1) to the pixels P (1,2), Changes to P (2,2). Therefore, the driver IC 41 outputs R (1,2), G (1,2), B (1,2), R (2,2), G (2,2), B ( Data signals for 6 dots relating to (2) and (2) are output in time series. The output time-series signal is time-divided into six and then allocated to data lines X1 to X6. The same applies to the subsequent steps, and data writing to each pixel row is performed line-sequentially until the lowest pixel row is selected.
[0027]
FIG. 4 is an explanatory diagram of the polarity inversion drive according to the present embodiment. A feature of the present embodiment is that a block of a predetermined size defined by dividing the display unit 1 is used as an inversion unit instead of using one dot as an inversion unit. Specifically, the M data lines X1 to XM are divided every m lines. Here, m is preferably an integral multiple (including the same number; the same applies hereinafter) of the number k of data lines defining a group in time-division driving in order to reduce the number of polarity inversions and reduce power consumption. . When one pixel is composed of three dots of red, blue, and green, it is desirable that m is an integral multiple of three.
[0028]
In the present embodiment, unlike the second embodiment described later, the scanning lines Y1 to YN are not divided. Therefore, a strip-shaped block (m dots × N lines) having an m dot width extending in the vertical direction, in other words, a data line group composed of m data lines X is defined as a block. In this case, the polarity inversion drive performed by the data line drive circuit 4 is a V line inversion drive in which m data line groups are used as an inversion unit. In the example shown in FIG. 4, the number m of the data lines X defining the block is set to 6, that is, the same as the number k of the data lines X forming one group in the time-division driving. However, from the viewpoint of reducing power consumption by reducing the number of times of performing the polarity inversion, it is not always necessary that m and k match, and m may be an integral multiple of k.
[0029]
The data line drive circuit 4 controls the polarity of the data signal output to the data lines X1 to XM according to the following three rules. First, data signals having the same polarity are output to the same block. For example, in FIG. 4, data signals having the same polarity (positive polarity) are output to a block of 6 dots × N lines defined by the data line groups X1 to X6. Second, data signals of opposite polarities are output between adjacent blocks. For example, when a positive data signal is output to a block defined by data line groups X1 to X6, a negative data signal is output to a block defined by data line groups X7 to X12 adjacent to the right side. Is output. Third, the polarity of the data signal is inverted for a predetermined period (for example, for each frame) using each block as an inversion unit. For example, if a positive data signal is output in the current frame for a block defined by the data line groups X1 to X6, a negative data signal is output in the next frame.
[0030]
According to the present embodiment, by performing V-line inversion driving with m data lines X defining a block (data line group) as an inversion unit, normal V-line inversion is performed with a single data line as an inversion unit. The number of times of inverting the polarity of the data signal can be reduced as compared with the driving. Therefore, it is possible to reduce power consumption by reducing the number of polarity inversions. This polarity inversion drive is effective as a measure for reducing power consumption, which becomes more severe as the definition of display progresses. Note that, as the resolution becomes higher and the resolution approaches the limit at which the user can visually recognize the flicker, the flicker itself becomes less noticeable. Therefore, even if the polarity inversion drive is performed in units of m dots larger than one dot, the deterioration of the display quality does not matter much. For the reasons described above, the polarity inversion driving method according to the present embodiment is particularly suitable for performing high-definition display.
[0031]
Further, according to the present embodiment, the number m of data lines defining one block in the polarity inversion drive is set to be an integral multiple of the number k of data lines defining one group in the time-division driving, thereby reducing power consumption. Can be further reduced. This is because, as shown in FIG. 5, there is no need to invert the polarity of the data signal in the same frame period. Therefore, during that period, only the data signal of the same polarity needs to be continuously output to one output line DO1 without performing the polarity inversion. As a result, the number of polarity inversions can be significantly reduced as compared with Patent Document 1 (see FIG. 6 of the document), and power consumption can be reduced accordingly. At the same time, as the number of times of polarity inversion is reduced, the operation can be speeded up and the circuit configuration can be simplified, which is a great advantage in achieving higher definition.
[0032]
(Second embodiment)
FIG. 6 is an explanatory diagram of the polarity inversion drive according to the second embodiment. In the present embodiment, a block serving as an inversion unit is defined by not only dividing the data lines X1 to XM but also dividing the scan lines Y1 to YN. Specifically, M data lines X1 to XM are divided every m (m is an integer multiple of k), and N scanning lines Y1 to YN are divided every n (n is a natural number). . Thereby, a block of m dots × n lines is defined. In this case, the polarity inversion drive performed by the data line drive circuit 4 is a block inversion drive using a block of m dots × n lines as an inversion unit. In the example shown in FIG. 6, m = 6, that is, the number is set to be the same as the number k of lines forming one group in the time division driving, and n is set to 2.
[0033]
The data line drive circuit 4 controls the polarity of the data signal output to the data lines X1 to XM according to the same rule as in the first embodiment. In the present embodiment, as shown in FIG. 7, the polarity of the output data signal is inverted every two lines even within the same data line within one frame period. That is, the polarity inversion does not occur when the scanning line Y switches from the odd number to the even number, but the polarity inversion occurs when the scanning line Y switches from the even number to the odd number. Therefore, the number of polarity inversions is larger than in the first embodiment.
[0034]
According to the present embodiment, as in the first embodiment, the number of times the polarity inversion of the data signal is performed can be reduced as compared with the complete dot inversion driving, and thus the power consumption can be significantly reduced. And it is easy to respond to high definition. Further, according to the present embodiment, in particular, it is possible to eliminate a display defect caused by the V-line inversion drive of the first embodiment.
[0035]
(Third embodiment)
This embodiment relates to a configuration in which a reset circuit is added to each of the above embodiments. FIG. 8 is a configuration diagram of the reset circuit according to the present embodiment. The reset circuit 6 has a configuration in which switches for shorting adjacent data lines X are connected in series in the horizontal direction. The conduction of each switch is controlled by a control signal DC generated in the control circuit 5.
[0036]
Before inverting the polarity of the data signal, the reset circuit 6 short-circuits the data lines (for example, X1 to X6 and X7 to X12) to which the data signal of the opposite polarity has been output. For example, in the first embodiment, as shown in FIG. 5, since the polarity inversion occurs with the transition of the frame, the control signal DS is set to the H level prior to this. This causes the reset circuit 6 to short-circuit between X1 to X6 and X7 to X12. As a result, the charge charged in the data line X is discharged, and the voltage of the data line X approaches the vicinity of the intermediate voltage between the positive electrode and the negative electrode. The power consumption can be reduced by the amount approaching the polarity side to be supplied in the next line. Further, since the next charging process of the data line X can be performed quickly, it is possible to shorten the 1H period (speed up line selection). Further, since the number of lines can be increased, it is easy to cope with high definition. Further, for example, in the second embodiment, as shown in FIG. 7, the polarity inversion occurs as the scanning line Y shifts from the even number to the odd number. Therefore, as shown in FIG. 9, the control signal DS is set to the H level in the blanking period t0 to t1 before shifting to the odd-numbered scanning line Y. As a result, X1 to X6 and X7 to X12 are short-circuited, and the voltage of the data line X approaches the intermediate voltage.
[0037]
As described above, according to the present embodiment, the power required to charge the data line X can be reduced, so that low power consumption can be achieved.
[0038]
(Fourth embodiment)
FIG. 10 is a block diagram of an electro-optical device according to the fourth embodiment. In the present embodiment, a precharge circuit 7 is added instead of or in addition to the reset circuit. The precharge circuit 7 is provided between the data lines X1 to XM and the precharge line to which the precharge voltage Vpc is applied, on the side opposite to the data line drive circuit 4, and is generated by the control circuit 5. Is controlled by the control signal PC. That is, when the control signal PC is at the H level, the precharge switch forming the precharge circuit 7 is turned on, and the data lines X1 to XM are charged at the predetermined precharge voltage Vpc. This precharge operation is performed before inverting the polarity of the data signal, as in the case of the reset circuit 6. This makes it possible to speed up line selection and the like.
[0039]
In each of the above-described embodiments, an example in which a liquid crystal element is used as an electro-optical element has been described. However, the present invention is not limited to this, and can be applied to various electro-optical elements that perform polarity inversion driving.
[0040]
Further, the electro-optical device according to each embodiment described above can be mounted on various electronic devices including, for example, a television, a projector, a mobile phone, a mobile terminal, a mobile computer, a personal computer, and the like. If the above-described electro-optical device is mounted on these electronic devices, the commercial value of the electronic devices can be further increased, and the product appeal of the electronic devices in the market can be improved.
[0041]
【The invention's effect】
According to the present invention, it is possible to realize a polarity inversion drive suitable for high definition display, and to reduce power consumption in the polarity inversion drive.
[Brief description of the drawings]
FIG. 1 is a block diagram of an electro-optical device according to a first embodiment. FIG. 2 is an equivalent circuit diagram of an electro-optical element. FIG. 3 is an operation timing chart of time division driving. FIG. FIG. 5 is a diagram illustrating an example of a voltage waveform of a data signal according to the first embodiment. FIG. 6 is a diagram illustrating a polarity inversion drive according to a second embodiment. FIG. 8 is an explanatory diagram of a waveform of a data signal according to the second embodiment. FIG. 8 is a configuration diagram of a reset circuit according to the third embodiment. FIG. 9 is an operation timing chart of the reset circuit. FIG. Block diagram of electro-optical device [Description of reference numerals]
DESCRIPTION OF SYMBOLS 1 Display part 2 Electro-optical element 3 Scanning line drive circuit 4 Data line drive circuit 5 Control circuit 6 Reset circuit 7 Precharge circuit 21 TFT
22 Liquid crystal capacitor 22a Pixel electrode 22b Counter electrode 23 Storage capacitor 41 Driver IC
42 DAC
43 time division circuit 44 reset circuit

Claims (17)

In electro-optical devices,
Multiple scan lines,
Multiple data lines,
A plurality of electro-optical elements provided corresponding to the intersection of the scanning line and the data line,
The plurality of data lines are divided into m (m is a natural number of 2 or more) lines to define a plurality of blocks, output data signals of the same polarity to the same block, and output the blocks adjacent to each other. An electro-optical device comprising: a data line driving circuit for performing a polarity inversion drive for outputting a data signal having a reverse polarity between the blocks and inverting the polarity of the data signal every predetermined period by using the block as an inversion unit. . Time-division driving is performed to sequentially output data signals to each of k (k is a natural number of 2 or more) data lines by time-dividing a time-series signal output to a certain output line. In an optical device,
Multiple scan lines,
Multiple data lines,
A plurality of electro-optical elements provided corresponding to the intersection of the data line and the scanning line,
The plurality of data lines are divided every m (m is an integer multiple of k) lines to define a plurality of blocks, output data signals of the same polarity to the same block, and output the blocks adjacent to each other. And a data line driving circuit for performing a polarity inversion drive for inverting the polarity of the data signal by using the block as an inversion unit every predetermined period and outputting a data signal having an opposite polarity between the data lines. apparatus. The data line driving circuit has a plurality of selection switches provided corresponding to each of the k data lines,
3. The electro-optical device according to claim 2, wherein the k data lines are commonly connected to an upper output line to which the time-series signal is supplied via the selection switch. . 4. The electro-optical device according to claim 3, wherein each of the selection switches is sequentially turned on while offsetting each other within a predetermined period. The block is a data line group of the m data lines,
5. The electro-optical device according to claim 1, wherein the data line driving circuit performs V-line inversion driving using the data line group as an inversion unit as the polarity inversion driving. 6. The block is defined by dividing the plurality of scanning lines into n (n is a natural number) lines,
5. The electro-optical device according to claim 1, wherein the data line drive circuit performs block inversion drive using the block as an inversion unit as the polarity inversion drive. 6. 7. The electro-optical device according to claim 1, wherein m is an integral multiple of 3 when one pixel is composed of three dots of red, blue, and green. 8. The electric device according to claim 1, further comprising a reset circuit that short-circuits the data lines to which the data signals of the opposite polarities are output before performing the polarity inversion of the data signals. Optical device. 9. The electro-optical device according to claim 1, further comprising a precharge circuit for precharging the data line to a predetermined voltage before inverting the polarity of the data signal. An electronic apparatus on which the electro-optical device according to claim 1 is mounted. A plurality of scanning lines, a plurality of data lines, and a polarity inversion driving method of an electro-optical device having a plurality of electro-optical elements provided corresponding to intersections of the scanning lines and the data lines,
The plurality of data lines are divided into m (m is a natural number of 2 or more) lines to define a plurality of blocks, output data signals of the same polarity to the same block, and output the blocks adjacent to each other. A first step of outputting a data signal of opposite polarity between;
A second step of inverting the polarity of the data signal every predetermined period using the block as an inversion unit. A plurality of scanning lines, a plurality of data lines, a plurality of electro-optical elements provided corresponding to intersections of the scanning lines and the data lines, and a time-series signal output to a certain output line In a polarity inversion driving method of an electro-optical device that sequentially outputs data signals to each of k (k is a natural number of 2 or more) data lines by time-dividing
The plurality of data lines are divided every m (m is an integer multiple of k) lines to define a plurality of blocks, output data signals of the same polarity to the same block, and output the blocks adjacent to each other. A first step of outputting a data signal of opposite polarity between;
A second step of inverting the polarity of the data signal every predetermined period using the block as an inversion unit. 13. The method according to claim 11, wherein the block is a data line group including the m data lines. The method according to claim 11, wherein the block is defined by dividing the plurality of scanning lines into n (n is a natural number) lines. The polarity inversion driving of the electro-optical device according to any one of claims 11 to 14, wherein when one pixel is constituted by three dots of red, blue, and green, m is an integral multiple of three. Method. 16. The method according to claim 11, further comprising, before inverting the polarity of the data signal, a third step of short-circuiting the data lines to which the data signal of the opposite polarity has been output. Polarity driving method for an electro-optical device. 17. The electro-optical device according to claim 11, further comprising a fourth step of precharging the data line to a predetermined voltage before inverting the polarity of the data signal. Polarity inversion driving method.

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