JPH05150750A - Driving system for display device - Google Patents

Abstract

PURPOSE:To apply the same driving voltage to the same display picture element and to prevent an effective value different from becoming narrow owing to waveform distortion by holding a scanning select signal at a nonselection potential until the potential of a column electrode driving voltage becomes nearly stable. CONSTITUTION:The scanning select signal is held at the nonselection potential until potential variation in each column electrode driving voltage Y becomes nearly stable at the leading edge of each selection period. At the trailing edge of each selection period, the scanning select signal is varied to a nonselection potential prior to potential fixation and after the transition almost ends, the potential of each column electrode driving voltage is fixed. Further, the scanning select signal is varied to the nonselection potential prior to the variation in each column electrode driving voltage at the time of in-row inversion and after the potential variation nearly ends, the scanning select signal is varied to the selection potential again. Consequently, a driving voltage waveform which is applied in the selection period is not affected by the column electrode driving voltage stage of a last row and the influence of display data of a next row is eliminated in the process of transition from the selection period to the nonselection period.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel having a plurality of column electrodes and a plurality of row electrodes, and a row electrode driving circuit for applying a scanning selection signal to the row electrodes. And a column electrode drive circuit that applies a column electrode drive signal based on display data to the column electrode, a drive power supply circuit, and a control circuit, and each display pixel has both ends of each pixel through a selection period and a non-selection period. And a drive circuit of a display device which is driven in relation to an effective value of a drive voltage applied to the pixel and which displays a bright and dark display state by a difference in the effective value of the drive voltage applied to both ends of each pixel in the selection period. It is a thing. FIG. 2 is a conceptual block diagram of a general liquid crystal display device. A plurality of row electrodes X1, X2, ... Xm are connected to a row electrode drive circuit 203, and a plurality of column electrodes. Y1, Y2
, Yn are connected to a column electrode drive circuit 202, and the column electrode drive circuit 202 and the row electrode drive circuit 203 are connected to a control circuit 201 and a drive power supply circuit 204, respectively. Here, it is assumed that m is an even number. The display data source is included in the control circuit 201. FIG. 3 shows the column electrode drive circuit 2 shown in FIG.
02 is a block diagram showing the row electrode drive voltage circuit 203 more specifically, and the drive power supply circuit 204 is not shown. In FIG. 3, the column electrode drive circuit 202 receives a control signal including a clock signal and display data from the control circuit 201 and stores the display data.
01 and a control signal from the control circuit 201,
A holding circuit 302 that holds the output of the memory circuit 301 for one selection period of row electrode scanning, a voltage switching circuit 303 that inverts the output of the data holding circuit 302 based on a polarity inversion signal from the control circuit 201, and the holding circuit 302. Voltage switching circuit 3
The output circuit 304 generates a column electrode drive voltage to be applied to each column electrode of the display panel 307 on the basis of the output of the display panel 307.
A scan signal generation circuit 305 which receives a control signal including a clock signal from 01 and creates a row electrode scan selection signal;
The output signal of the scanning signal generation circuit 305 and the control circuit 2
An output circuit 30 for generating a row electrode drive voltage to be applied to each row electrode of the display panel 307 according to a control signal from 01.
It is composed of 6. FIGS. 4 (a) and 4 (b) are diagrams showing a typical setting method of voltages applied to the row electrodes and column electrodes when driving the liquid crystal display device shown in FIGS. Yes, Figure 4
(A) is a system using 6 level voltages of V1 to V6, and FIG. 4 (b) is a system using 4 level voltages of ± Vc and ± Vs. The present invention is compatible with any of the methods, but the description will be given for the case of using the method of FIG. FIG. 5 shows more detailed driving waveforms when the driving method of FIG. 4B is adopted. In FIG. 5, the first row electrode X1 is selected during the periods T1 and t1. The periods T2 and t2 are periods for selecting the second row electrode X2, and the periods Tm and tm are similarly periods for selecting the mth row electrode Xm. If the periods T1 to Tm and the periods t1 to tm are defined as one field, each pixel of the first row electrode X1 and P11 to P1 n are selected only in the period T1 or t1 in one field. Other periods are called non-selection periods. When the potential applied to the row electrodes during the non-selection period is defined as the reference potential (0V), + Vc is applied to the row electrode X1 and 0 to the other row electrodes during the period T1.
V is applied. In the period T2, + Vc is applied to the row electrode X2, and 0V is applied to the other row electrodes. Similarly, + V is applied to the row electrode Xm during the period Tm.
c is applied, and 0V is applied to the other row electrodes.
Moving to the next field, -Vc is applied to the row electrode X1 in the period t1, 0V is applied to the other row electrodes, and -Vc is applied to the row electrode X2 in the period t2. 0V is applied to the row electrode of, and similarly, −Vc is applied to the row electrode Xm during the period tm.
0V is applied to the other row electrodes. This method is called a field inversion method. In FIG. 5, the symbol F indicates a field inversion signal. On the other hand, regarding the column electrodes, three column electrodes Y
Consider a, Yb, and Yc. Further, the liquid crystal is of a type that displays a bright state by a high applied voltage. The display of all pixels on the column electrode Ya is in a bright state, the display of all pixels on the column electrode Yb is in a dark state, and the display of pixels on the column electrode Yc is alternately in a bright state and a dark state. If it is performed, -Vs is applied to the column electrode Ya over the entire period of T1 to Tm, and + Vs is applied over the entire period of the period t1 to tm. + Vs is applied to the column electrode Yb for all the periods T1 to Tm, and -Vs is applied for all the periods t1 to tm. In addition, the column electrode Yc
, The periods T1, T3, ... Tm-1 and t2, t4,
...- Vs is applied to tm, and the periods T2, T4
, ... + Vs for Tm and t1, t3, ... tm-1
Is applied. That is, the column electrode drive voltage (row electrode drive voltage) such that the absolute value of the drive voltage applied to both ends of the liquid crystal becomes | Vc + Vs | during the selection period in which a bright state is displayed on each column electrode. Is + Vc, + Vs is applied when the row electrode drive voltage is -Vc, and the absolute value of the drive voltage applied to both ends of the liquid crystal is | A column electrode drive voltage (+ Vs when the row electrode drive voltage is + Vc, −Vs when the row electrode drive voltage is −Vc) that is VC−Vs | is applied. At this time, the pixel P1a is formed at the intersection of the first row electrode X1 and the column electrode Ya, and the pixel P1a is formed at the intersection of the first row electrode X1 and the column electrode Yb. The driving voltage applied to both ends of the pixel P1b and the pixel P1c formed at the intersection of the row electrode X1 of the first row and the column electrode Yc is as shown in FIG. The pixels P1a, P
The absolute value of the drive voltage applied to 1c is | Vs + Vs | during the selection period and | Vs | during the non-selection period, and the effective voltage over one field is the value expressed by the equation 1. Thus, both the pixels P1a and P1c exhibit the bright state. The absolute value of the driving voltage applied to the pixel P1b is | Vs-Vs | in the selection period and | Vs | in the non-selection period, and the effective voltage over one field is several 2. The pixel P1b has the indicated value and exhibits the dark state. [Equation 1] [Equation 2] In equations 1 and 2, (Vc ± Vs) 2 / m
Is related to the selection period, and is (m-1) .Vs2
The term / m is related to the non-selection period. The larger the value of V1 / V2, the better the contrast between the bright state and the dark state. V1 / V2 is given by the equation 3, and its theoretical maximum value is given by the equation 4. [Equation 3] [Equation 4] FIG. 5 shows an ideal waveform, but in reality, the waveform of each part is distorted and the waveform is not as shown in FIG. FIG. 6 is a waveform diagram illustrating a case where the scan selection voltage has no distortion and the column electrode drive voltage has distortion. Examination of these waveform diagrams reveals that there are various factors that reduce display quality. First, the pixel P, which is in a bright display state, is displayed.
When the non-selection periods of 1a and P1c are examined, + Vs is constantly applied from the non-selection period T2 to Tm because there is no change in the data from the period T1 to the period Tm (hereinafter referred to as T field) in the case of the pixel P1a. To be done. On the other hand, in the pixel P1c, the display data changes in each selection period, and the influence of the waveform distortion occurs each time this change occurs, and the effective voltage in the non-selection period decreases. Therefore, both P1a and P1c display the bright state, but the display states are different. Next, comparing the driving voltage waveforms applied to the pixels P1a and P1c during the selection period, it can be seen that they are not the same. That is, it can be seen that in the selection period T1, the voltage waveform applied to the pixel P1a is affected by the waveform distortion at the leading edge of the period T1 and the effective voltage decreases. On the other hand, the drive voltage applied to the pixel P1c has an ideal voltage waveform during the period T1. It is obvious that the cause of this is due to the state of the column electrode drive voltage in the selection period preceding the selection period. As a result of the above phenomenon, the pixels P1a, P1
The effective values of the drive voltage applied to 1c are not equal, and different display states are exhibited, which causes so-called crosstalk. Of course, this phenomenon also affects the contrast. Next, when the pixels P1a and P1b are examined,
There is no difference in the effective value of the drive voltage in the non-selection period of both. However, there is a problem with the drive voltage waveform during the selection period. That is, at the leading edge of the selection period T1, the pixel P1
Both of the drive voltage waveforms applied to a and P1b are distorted, but their influences are different, and the effective voltage decreases in the pixel P1a, but the effective voltage increases in the pixel P1b. .. Therefore, the pixel P1a exhibiting the bright state becomes dark, and the pixel P1b exhibiting the dark state becomes bright, so that the contrast is lowered. The influence of waveform distortion at a high voltage during selection is extremely large. Further, when the scanning selection signal also has distortion, the driving voltage waveform is changed in the process of shifting from the selection period to the non-selection period as described in Japanese Patent Laid-Open No. 3-130797 (hereinafter referred to as Reference 1). Affected by the display data of the next line,
Adverse effects occur. To some extent, the waveform distortion can be completely eliminated, and the problems can be summarized into the following four. (1) A point that a difference occurs in the number of times waveform distortion occurs during the non-selection period. (2) The driving voltage waveform is influenced by the state of the column electrode driving voltage of the preceding row at the leading edge of the selection period. (3) Regarding pixels in different display states, the waveform distortion of the column electrode drive voltage within the selection period affects the direction in which the contrast is lowered in the applied drive voltage waveform. (4) The drive voltage waveform is affected by the display data of the next row in the process of shifting from the selected period to the non-selected period. With respect to these points, for example, the above-mentioned Reference 1 states that "the voltage level of each data signal is set to one of a black level and a white level for a predetermined period immediately before the rise and fall of the scan pulse, and the rise and This is a technique for solving the above problems (2) and (4) by setting the voltage level to the other of the black level and the white level for a predetermined period immediately after the fall. When this is applied to the case shown in FIG. 5 of the present application, the result is shown in FIG. 7. In FIG. 7, a symbol F is a field inversion signal, and symbols M and N fix the column electrode drive voltage to a specific potential regardless of display data when the potential is high (logic 1). It is a signal. In the case of FIG. 7, the signal M becomes the short-time logic 1 immediately before the rising and falling of the scanning selection signal, and the signal N becomes the short-time logic 1 immediately after the rising and falling of the scanning selection signal. Symbols Da and D
b and Dc represent display data to be displayed on the column electrodes Ya, Yb, and Yc, respectively, and when the logic value is 1, the bright state is displayed.
When logic 0, the dark state shall be displayed. Therefore, all the pixels of the column electrode Ya display the bright state, all the pixels of the column electrode Yb display the dark state, and the pixels on the column electrode Yc repeat the display of the bright state and the dark state for each row. FIG. 7 shows that the level of the column electrode drive voltage is set to the black level (dark display state) for a short time immediately before the rise and fall of the scan selection signal, and immediately after the rise and fall. The case where the level of the column electrode drive voltage is set to the white level (bright display state) for a short time is shown. According to FIG. 7, the column electrode driving voltage is fixed to a specific potential at the leading edge and the trailing edge of each selection period regardless of the display data. Therefore, the problems (1), (4) ), It can be seen that it has been improved. However, although it seems that (2) is improved,
Actually, when the field inversion is performed, the waveforms on the first line and the other lines are different even if the same display is performed. This point is as described in the prior application (referred to as Reference 4) of the present invention, and the problem (3) includes not only the waveform distortion but also the leading edge of the selection period and It is considered that there is a waveform difference at the edge and it is rather worse. Next, FIG. 8 shows the case of the technique disclosed in Japanese Patent Laid-Open No. 2-6921. This technique "provides a period in which the voltage applied to the liquid crystal cell is 0 V every scanning period", and is intended to improve the above-mentioned problem (1). Shows the case where the drive voltage applied to the liquid crystal is set to zero. Also in this case, the problems (1) and (2) are improved. Regarding (4), although the waveforms of the bright display pixels and the dark display pixels are different, the same waveform is obtained for the pixels in the same display state, and thus it can be said that the above (4) is also improved. However, regarding (3), the problem still remains at the leading edge of the selection period. FIG. 9 is an operation waveform diagram showing the drive method proposed by the present inventor in FIG. 1 of the prior application (referred to as Reference 3). In-row inversion (inversion of the polarity of the drive voltage within each selection period is performed). Yes) and field inversion, and each column electrode drive voltage is fixed to a potential corresponding to either a bright state or a dark state (dark state in FIG. 12) irrespective of display data only at the trailing edge of each selection period. .. This method has the above-mentioned problem (1),
Although (4) is eliminated, as described in Reference 4, a difference occurs in the drive voltage waveforms in the same display state between the first row immediately after field inversion and the other rows. Further, regarding (3), it is improved as compared with the method of the above-mentioned reference 1, but it is not completely solved. The problem to be solved by the present invention is to solve the above-mentioned problems (2), (3) and (4) concerning the drive voltage waveform in the selection period. .. To solve the above problems, the first means used by the present invention is to drive a row electrode based on a scanning selection signal and a column electrode group to which a column electrode drive voltage is applied. A driving method of a display device having a row electrode group to which a voltage is applied, at least at the leading edge of the selection period, a period until the potential of the column electrode driving voltage applied to each column electrode is substantially stable, That is, the potential of the scan selection signal is set to a non-selection potential. The second means used by the present invention to solve the above problem is to provide a column electrode group to which a column electrode drive voltage is applied and a row electrode group to which a row electrode drive voltage based on a scan selection signal is applied. In the driving method of the display device, the potential of the scan selection signal is set to a non-selection potential before the potential change of the column electrode drive voltage applied to each column electrode starts at least at the trailing edge of the selection period. That is to say. A third means used by the present invention to solve the above-mentioned problems is to provide a column electrode group to which a column electrode drive voltage is applied and a row electrode group to which a row electrode drive voltage based on a scan selection signal is applied. A driving method of a display device having, inversion of the scanning selection signal in a row, at least immediately after the inversion of the row, until the potential of the column electrode drive voltage applied to each column electrode is substantially stable, That is, the potential of the scan selection signal is set to a non-selection potential. A fourth means used by the present invention to solve the above-mentioned problem is to provide a column electrode group to which a column electrode drive voltage is applied and a row electrode group to which a row electrode drive voltage based on a scan selection signal is applied. A driving method of a display device having, wherein the scanning selection signal is inverted within a row, and at least immediately before the inversion within the row, before the potential change of the column electrode drive voltage applied to each column electrode is started, That is, the potential of the scan selection signal is set to the non-selection potential. By using the above means, the above problem (2),
(3) and (4) are solved. That is, the drive voltage waveform applied during the selection period is not affected by the state of the column electrode drive voltage of the previous row, and the drive voltage waveform is affected by the display data of the next row during the transition from the selection period to the non-selection period. It is not affected by the distortion of the column electrode drive voltage during the selection period. FIG. 10 shows a first embodiment of the present invention when the present invention is applied to FIG. 6, and adopts both the first solving means and the second solving means. Thus, at the leading edge of each selection period, the scan selection signal is held at the non-selection potential until the potential change of each column electrode drive voltage (Y) becomes substantially stable. Further, at the trailing edge of each selection period, the scanning selection signal is shifted to the non-selection potential before the end of the selection period, and the potential change of each column electrode drive voltage is started after the transition is almost completed. To Specifically, the signal H may be supplied, and when the signal H has a high potential, the scan selection signal may be forcibly set to the non-selection potential. Comparing the operation waveforms shown in FIG. 10 with the case of FIG. 6, it can be seen that the problems (2), (3) and (4) are solved. FIG. 11 shows a second embodiment in which the present invention is applied to FIG. 7, until the potential change of each column electrode drive voltage (Y) becomes substantially stable at the leading edge of each selection period. During the period, the scan selection signal is held at the non-selection potential. Further, at the trailing edge of each selection period, the scanning selection signal is shifted to the non-selection potential before the potential is fixed, and the potential of each column electrode drive voltage is fixed after the transition is almost completed. To do. Comparing the operation waveforms shown in FIG. 11 with those in FIG. 7, the problems (1), (2), (3),
You can see that (4) is all solved. FIG. 12 shows a third embodiment in which the present invention is applied to FIG. 8, until the potential change of each column electrode drive voltage (Y) becomes substantially stable at the leading edge of each selection period. During the period, the scan selection signal is held at the non-selection potential. Further, at the trailing edge of each selection period, the scanning selection signal is shifted to the non-selection potential before the potential is fixed, and the potential of each column electrode drive voltage is fixed after the transition is almost completed. To do. Specifically, when the signal H has a high potential, the scanning selection signal may be forcibly set to a non-selection potential. When the operation waveforms shown in FIG. 12 are compared with those in FIG. 8, the problems (1), (2), (3),
You can see that (4) is all solved. The waveforms shown by the wavy lines in FIGS. 11 and 12 are obtained when the timing of fixing the scanning selection signal to the non-selection potential at the trailing edge of the selection period is set at the same time as the potential of the column electrode drive voltage is fixed. Is shown. Even if the scan selection signal is distorted, a fixed waveform is displayed in each of the bright state and the dark state regardless of the display state of the next row. The timing of ending the transition of the scan selection signal to the non-selection potential may slightly overlap. FIG. 13 shows a fourth embodiment in which the present invention is applied to FIG. 9, and in the case where the solving means 1 and 2 are applied, each column electrode at the leading edge of each selection period. The scan selection signal is held at the non-selection potential until the potential change of the drive voltage (Y) becomes substantially stable. Further, at the trailing edge of each selection period, the scanning selection signal is shifted to the non-selection potential before the potential is fixed, and the potential of each column electrode drive voltage is fixed after the transition is almost completed. To do. When the operation waveforms shown in FIG. 13 are compared with the case of FIG. 9, the problem (1) and the problem (2) at the leading edge and the trailing edge of the selection period, (3), (4)
You can see that is solved. However, the problem of (3) remains when the in-line inversion is performed. FIG. 1 shows a fifth embodiment of the present invention which is a further improvement of FIG.
In the case of applying the solving means 1, 2, 3 and 4, until the potential change of each column electrode drive voltage (Y) becomes substantially stable at the leading edge of each selection period. The scanning selection signal is held at the non-selection potential during the period, and at the trailing edge of each selection period, the scanning selection signal is shifted to the non-selection potential before the potential is fixed, and after the transition is almost completed. The fixing of the potential of each column electrode drive voltage is started, and the scan selection signal is shifted to the non-selection potential before the change of each column electrode drive voltage at the time of inversion in the row to drive each column electrode drive. After the potential change of the voltage is almost completed, the scan selection signal is shifted to the selection potential again. When the operation waveforms shown in FIG. 1 are compared with the case of FIG. 9, the problems (1), (2), (3),
You can see that (4) is all solved. Now, for example, in the embodiment of FIG. 10, when the definition of "selection period" is changed, FIGS. 14, 15 and 16 are obtained. The operation performed at the trailing edge of the selection period in FIG. 10 is performed at the leading edge of the selection period in FIG. That is, at the leading edge of each selection period, the start timing of the change of the column electrode drive voltage is started after the scanning selection signal of the previous row becomes almost the non-selection potential, and the column electrode drive voltage of the row is changed. The scan selection signal of the row is fixed to the non-selection potential until the voltage based on the display data becomes almost stable. The operation performed at the trailing edge of the selection period in FIG. 10 is performed at the trailing edge of the selection period in FIG. That is, at the trailing edge of each selection period, the scan selection signal is shifted to the non-selection potential before the change of the column electrode drive voltage is started, and the column electrode drive voltage is changed to the next level before the end of the selection period. Make the voltage almost stable based on the display data of the row. The operation performed at the trailing edge of the selection period in FIG. 10 is performed between the selection periods in FIG. That is, a stabilization period in which all the scan selection signals become non-selection potential is provided between each selection period, and within the stabilization period, the voltage based on the display data of the previous row of the voltage of each column electrode drive voltage is changed to the next row. Almost complete the transition to the voltage based on the display data. [0046] In Figs. 14, 15 and 16, Fig. 7,
When the column electrode drive voltage is fixed as shown in FIGS. 8 and 9, it goes without saying that it is performed within the period in which the scan selection signal is at the non-selection potential. To summarize the above-described embodiments of the present invention, "operate so that the potential of each scan selection signal becomes substantially a non-selection potential at least during the period when the column electrode drive voltage is expected to change." become. It goes without saying that the present invention is also effective for drive systems other than the illustrated embodiment. In implementing the present invention, it is natural that consideration should be given to the DC component remaining in the liquid crystal drive voltage (for example, the drive time in the positive polarity direction should be the same as the drive time in the negative polarity direction). As described above, according to the present invention, the same effective voltage is always applied to the pixels in the same display state, so that the occurrence of crosstalk is suppressed and the display state is deteriorated during the selection period. Since the voltage in the direction is not applied, the deterioration of the contrast can be suppressed, and a very good display device can be provided, and the effect is great.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an operation waveform diagram showing a fifth embodiment of the present invention. FIG. 2 is a diagram showing a configuration of a liquid crystal drive circuit. FIG. 3 is a more detailed block diagram of a liquid crystal drive circuit. FIG. 4 is a waveform diagram showing a method of setting a liquid crystal drive voltage. FIG. 5 is a diagram showing a basic drive waveform of liquid crystal. FIG. 6 is a waveform diagram for explaining problems of a basic driving method. FIG. 7 is an operation waveform diagram for explaining a conventional example. FIG. 8 is an operation waveform diagram for explaining a conventional example. FIG. 9 is an operation waveform diagram for explaining a conventional example. FIG. 10 is an operation waveform diagram showing the first embodiment of the present invention. FIG. 11 is an operation waveform diagram showing a second embodiment of the present invention. FIG. 12 is an operation waveform diagram showing a third embodiment of the present invention. FIG. 13 is an operation waveform diagram showing a fourth embodiment of the present invention. FIG. 14 is an operation waveform diagram showing a fifth embodiment of the present invention. FIG. 15 is an operation waveform chart showing a sixth embodiment of the present invention. FIG. 16 is an operation waveform diagram showing a seventh embodiment of the present invention. [Explanation of reference numerals] 201 control circuit 202 column electrode drive circuit 203 row electrode drive circuit 204 drive power supply circuit 301 memory circuit 302 holding circuit 303 voltage switching circuit 304 output circuit 305 scanning signal generation circuit 306 output circuit 307 display panel

Claims (1)

1. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scan selection signal is applied. , At least at the leading edge of each selection period, the potential of the scan selection signal is set to a non-selection potential until the potential of the column electrode drive voltage applied to each column electrode becomes substantially stable. Display device drive system. 2. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scanning selection signal is applied, the method being at least for each selection period. A driving method for a display device, characterized in that the potential of the scan selection signal is set to a non-selection potential before the potential change of the column electrode drive voltage applied to each column electrode is started at the trailing edge. 3. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scanning selection signal is applied, wherein the scanning selection signal is In addition to performing the in-row inversion, at least immediately after the in-row inversion, the potential of the scan selection signal is set to a non-selection potential until the potential of the column electrode drive voltage applied to each column electrode becomes substantially stable. And driving method of the display device. 4. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scanning selection signal is applied, wherein the scanning selection signal is In addition to performing the in-row inversion, at least immediately before the in-row inversion, the potential of the scan selection signal is set to a non-selection potential before the potential change of the column electrode drive voltage applied to each column electrode is started. Driving method of display device. 5. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scan selection signal is applied, which is before each selection period. At the edge, the start timing of the change of the column electrode drive voltage is started after the scanning selection signal of the previous row becomes substantially the non-selection potential, and the column electrode drive voltage is changed to the voltage based on the display data of the row. A driving method of a display device, characterized in that the scanning selection signal of the row is fixed to a non-selection potential until the row is almost stable. 6. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scan selection signal is applied, the method being performed after each selection period. At the edge, prior to the start of the change in the column electrode drive voltage, the scan selection signal is shifted to the non-selection potential,
A driving method of a display device, characterized in that the column electrode driving voltage is made substantially stable to a voltage based on display data of the next row before the end of the selection period. 7. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scan selection signal is applied, wherein the driving method is performed during each selection period. A stabilization period is provided in which all the scan selection signals become non-selection potential, and within the stabilization period, the voltage based on the display data of the previous row of the voltage of each column electrode drive voltage based on the display data of the previous row. The drive system of the display device, which is characterized by almost completing the transition to. 8. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scan selection signal is applied, wherein at least each column electrode driving method is provided. A driving method of a display device, which is operated such that the potential of each scanning selection signal becomes substantially a non-selection potential during a period in which the voltage is expected to change. 9. A driving method of a display device having a column electrode group to which a column electrode driving voltage is applied and a row electrode group to which a row electrode driving voltage based on a scanning selection signal is applied, in which all the scanning selection signals are The column electrode drive voltage is fixed to a fixed potential that does not depend on the display data within the period of the non-selection potential. 1. The claim 1, claim 2, claim 3, and claim 3. A driving method of a display device according to claim 4, claim 5, claim 6, claim 7, and claim 8.