JP2007225898A - Liquid crystal display device and its driving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid crystal display device for performing division-scanning while dividing scanning electrodes, wherein occurrence of display density differences and a flicker of a picture element nearby a division area formed by dividing the scanning electrodes is prevented. <P>SOLUTION: One scanning electrode group and another scanning electrode group adjacent to the one scanning electrode group among a plurality of divided scanning electrode groups are sequentially selected in the same period in opposite directions from each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device that scans by dividing a scan electrode.

  The liquid crystal display device includes a liquid crystal display element in which a pixel including a liquid crystal layer is formed at an intersection between a signal electrode and a scanning electrode, and a drive circuit for driving the liquid crystal display element. The drive circuit includes a data drive circuit that applies data signals to the signal electrodes, a scan drive circuit that applies scan signals to the scan electrodes, and a control circuit that controls these drive circuits. The scan drive circuit selects the scan electrodes of the liquid crystal display element line by line and applies a scan signal to the data drive circuit, and the data drive circuit supplies a data signal to the signal electrode during the selected period and outputs data to the corresponding pixel. Write signal.

  In recent years, with the increase in the number of pixels of liquid crystal display elements, the number of scanning electrodes has also increased. The scanning of one screen of the liquid crystal display element must be performed within a certain period. That is, one screen is scanned at a constant frame frequency. Since the frame frequency is constant even if the number of scan electrodes increases, the period during which one scan electrode is selected becomes shorter as the number of scan electrodes increases. For example, when one screen is rewritten at 60 Hz, the period of one frame is 16.7 msec. When the number of scan electrodes is 1000, the selection period of one scan electrode is about 16.7 μsec. When the number of scan electrodes is increased to, for example, 2000, the scan electrode selection period is halved and shortened to about 8.4 μsec. However, when the TFT is formed between the signal electrode resistance or the signal electrode and the pixel, the on-resistance of the TFT is present, so this selection period cannot be made too short. This is because when the selection period is shortened, the amount of charge to be given to the pixels is insufficient due to insufficient writing time for each pixel, and the quality of the display image is deteriorated.

  In order to solve this, a method of dividing the scanning electrode and performing parallel scanning has been proposed (see, for example, Patent Document 1). A schematic configuration of the liquid crystal display unit described in Patent Document 1 is schematically shown in FIG. The liquid crystal display unit of the liquid crystal display device is divided into upper and lower parts. Each data line group 103, 104 extending from the data driving circuits 101, 102 is divided above and below the display area. Further, corresponding to the upper and lower data line groups 103 and 104, gate line groups 107 and 108 extending from the gate drive circuits 105 and 106 are formed.

In this liquid crystal display device, the gate drive circuit 105 scans the gate line group 107 and the gate drive circuit 106 scans the gate line group 108 from top to bottom in parallel during the same field period (arrow 109). Then, during the next field period, scanning is performed from the bottom to the top in parallel in the opposite direction (broken line 110). By performing parallel scanning in this way, the field period can be halved as compared with the case where all the gate lines are scanned sequentially. Alternatively, when the field period is fixed, the selection period of one scan electrode can be doubled. In this way, by dividing the scanning electrode into two groups and performing parallel scanning, the selection period can be doubled and deterioration of image quality can be prevented. Here, the field refers to a period during which all the scanning electrodes or gate electrodes are scanned at least once. In the case of a field sequential type liquid crystal display device described below, it means a period for displaying an image corresponding to one color.
JP 2002-62518 A

  However, as described above, when the gate lines are scanned in the same direction in parallel, there is a difference between the luminance of the pixel corresponding to the first gate line of scanning and the luminance of the pixel corresponding to the gate line scanned last. A brightness difference may occur. The solid lines 111 and 112 and the broken lines 113 and 114 indicated by the right arrow in FIG. 5 represent the luminance characteristics, and the higher the luminance of the pixel is, the lower the luminance of the pixel is. Is shown. When the gate line is scanned from the upper side to the lower side in the first field, as indicated by solid lines 111 and 112, the luminance is high at the start of scanning, and the luminance is lowered as the scanning proceeds. In the next field, scanning is performed from the lower side to the upper side, and as indicated by broken lines 113 and 114, the luminance is also high at the start of scanning, and the luminance decreases as the investigation proceeds.

  As a result, a luminance difference occurs at the boundary portion between the upper data line group 103 and the lower data line group 104. Further, as the scanning direction is reversed, the position where the luminance difference between the solid line 111 and the broken line 113 and between the solid line 112 and the broken line 114 is large, that is, the boundary portion between the upper data line group 103 and the lower data line group 104. In addition, flicker occurs on the upper and lower sides of the display area. As a result, display quality deteriorates. In the driving method shown in FIG. 5, flicker does not occur only in the vicinity of the intersection between the solid line 111 and the broken line 113 and in the vicinity of the intersection between the solid line 112 and the broken line 114.

  In the field sequential type liquid crystal display device, the above luminance difference is particularly problematic. In the field sequential method, an R color light is emitted from a light source during an R field in which an image corresponding to a red color (R) is displayed on a liquid crystal display element, and an image corresponding to a green color is displayed. Time-mixing is performed by irradiating light of G color from the light source during the period of G field, and irradiating light of B color from the light source during the period of B field displaying the image corresponding to the blue color (B). This is a method for obtaining a color image. In this method, full color display can be performed with one pixel without using a color filter. Compared to the case where the color filter method assigns each color of R, G, and B to three pixels and performs display, full-color display is performed by one pixel, so that the number of pixels can be reduced to 1/3. Therefore, the pixel density can be tripled. However, on the other hand, it is necessary to perform three scans of the R field, G field, and B field within one frame period, and high-speed writing is required.

  FIG. 6 is an explanatory diagram for explaining driving by the field sequential method. The horizontal axis represents a period of one field in time, and the vertical axis represents the scanning direction of the gate line. In the field sequential method, writing is sequentially performed on the gate lines in the writing period, and the display is performed during the display period after a response period for the liquid crystal to respond. A reset period is provided so that each pixel in the next field is not affected by the data written in the previous field. As can be understood from this figure, the display period is greatly different between the gate line selected first and the gate line selected last. Therefore, when the divided scanning shown in FIG. 5 is performed, the pixel on the gate line selected first in the data line group 103 and the data line group 104 has a high luminance because the display period is long, and the pixel on the gate line selected last. Since the display period of this pixel is short, the luminance is low. As a result, the difference in display density becomes noticeable at the boundary between the data line group 103 and the data line group 104, and at the same time, flicker occurs and the display quality deteriorates.

  Therefore, the liquid crystal display device of the present invention has the following configuration. That is, a liquid crystal display element in which a pixel is formed at each intersection of a plurality of scanning electrodes and a plurality of signal electrodes, a scanning drive circuit that sequentially selects scanning electrodes and gives scanning signals, and signal electrodes in synchronization with the scanning signals In the liquid crystal display device including a data driving circuit for supplying a data signal to the pixel and corresponding to the signal electrode, the scan electrode is divided into a plurality of scan electrode groups, and one scan electrode group among the plurality of scan electrode groups And another scan electrode group adjacent to one scan electrode group are sequentially selected in the opposite directions in the same period. Alternatively, the present invention provides a liquid crystal display element in which a pixel is formed at each intersection of a plurality of scanning electrodes and a plurality of signal electrodes, a scanning drive circuit that sequentially selects scanning electrodes and provides scanning signals, and is synchronized with the scanning signals. And a data driving circuit for supplying a data signal to the signal electrode and writing to a pixel corresponding to the signal electrode, and the scanning electrode is divided into a plurality of scanning electrode groups. One scan electrode group of the plurality of scan electrode groups is sequentially selected to give a scan signal, and another scan electrode group adjacent to one scan electrode of the plurality of scan electrode groups is In synchronization with the scanning signal applied to the scanning electrode group, the scanning signal is sequentially selected and applied in the scanning direction opposite to the scanning direction in which one scanning electrode group is sequentially selected.

  By adopting the above-described means, there is an advantage that the difference in display density can be reduced and the occurrence of flicker can be prevented in the boundary region between adjacent scan electrode groups.

  In the liquid crystal display device of the present invention, a liquid crystal display element that constitutes a pixel at each intersection where a plurality of scan electrodes and a plurality of signal electrodes intersect, and scanning that is driven by sequentially selecting the scan electrodes and providing a scan signal A driving circuit and a data driving circuit for supplying a data signal to the signal electrode in synchronization with the scanning signal and writing to each pixel are provided. The scan electrodes are divided into a plurality of scan electrode groups, and one scan electrode group and another scan electrode group adjacent to each other are sequentially selected and driven in the opposite directions in the same period.

  For example, when 2n scanning electrodes are formed, the first to nth scanning electrodes in the upper half are used as the first scanning electrode group, and the (n + 1) th to 2nth scanning electrodes in the lower half are used as the second scanning electrode. Let it be an electrode group. The signal electrodes are also divided into an upper half first signal electrode group corresponding to the upper half first scan electrode group and a lower half second signal electrode group corresponding to the lower half second scan electrode group. Then, the first scan electrode group is sequentially selected and scanned by the scan drive circuit in the order of n, n−1,..., 1 and the second scan electrode group is n + 1, n + 2,. The scanning drive circuit sequentially selects and scans in the order of 1 and 2n. Alternatively, the first scan electrode group is scanned in the order of 1, 2,... N-1, n, and the second scan electrode group is sequentially selected in parallel in the order of 2n, 2n-1,... N + 2, n + 1. And scan. When the scan electrode group is scanned as described above, the odd-numbered (or even-numbered) first scan electrode group and the second scan-electrode group are scanned first, and then the even-numbered (or odd-numbered) are scanned. You may make it scan.

  During the period in which the first scan electrode group is sequentially selected and scanned, a data signal is sequentially applied to the first signal electrode group in the upper half by the data driving circuit, and the second scan electrode group is sequentially provided in parallel. During the period selected and scanned, the data signal is sequentially applied to the second signal electrode group in the lower half by the data driving circuit. By performing the division scanning in this way, the time for scanning all the scan electrodes can be shortened to ½. Alternatively, when the period of one field or one frame is fixed, the selection period during which one scan electrode is selected can be doubled. Here, an example of dividing into two has been described, but it is also possible to divide into three or even more.

  As the liquid crystal display element, a simple matrix type display element in which a plurality of signal electrodes and a plurality of scanning electrodes respectively orthogonal to the inner surfaces of two substrates sandwiching a liquid crystal layer are formed can be used. In addition, a common electrode is formed on the inner surface of one substrate, a plurality of scanning electrodes on the inner surface of the other substrate, a plurality of signal electrodes orthogonal to the scanning electrode, and a TFT at each intersection where the scanning electrode and the signal electrode intersect. Alternatively, an active matrix liquid crystal display element in which an active element composed of a two-terminal element and a pixel electrode are formed can be used.

  Here, a liquid crystal display element driven by a field sequential method can be used as the liquid crystal display element. A liquid crystal display device using a field sequential method includes a light source that emits light of a plurality of colors, and the liquid crystal display element displays the one color from the light source during a field period in which an image of a color corresponding to the one color is displayed. By irradiating the liquid crystal display element with light of the other color and irradiating the light of the other color from the light source during the field period corresponding to the other color but displaying the layer, A color image can be displayed by color mixture. In the field sequential method, for example, when obtaining color images of R, G, and B colors, the scanning period of all the scanning electrodes is as short as 1/3 of that of a normal liquid crystal display element. Therefore, the writing time for writing to each pixel is shortened to 1/3. Therefore, if the scanning electrodes are divided into scanning electrode groups and parallel scanning is performed, the scanning period for scanning all the scanning electrodes can be shortened. Alternatively, if the scanning period remains unchanged, the selection period for selecting one scanning electrode can be expanded. In addition, it is possible to prevent a luminance difference and flicker from occurring in the divided areas divided into the scan electrode groups.

  A liquid crystal display device comprising a liquid crystal display element having pixels formed at intersections of scan electrodes and signal electrodes, a scan drive circuit for driving the scan electrodes, and a data drive circuit for supplying data signals to the signal electrodes and writing to the corresponding pixels. In the driving method of the display device, the scan driving circuit sequentially selects one scan electrode group among the plurality of scan electrode groups and gives a scan signal, and another scan adjacent to the one scan electrode group. The electrode group is sequentially selected in synchronization with the scanning signal applied to this one scanning electrode group, and the scanning signal is applied. At this time, scanning is performed so that the scanning direction in which one scanning electrode group is sequentially selected and scanned and the scanning direction in which another scanning electrode group adjacent thereto is scanned are reversed.

  As a result, in the boundary region between one scan electrode group and another scan electrode group, the difference in display density can be reduced and flicker can be prevented.

  Hereinafter, the liquid crystal display device of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic diagram illustrating a display unit of a liquid crystal display device in which a scan electrode group is divided into two and the luminance change thereof. As shown in FIG. 1, a scan electrode divided into a scan electrode group 7 (corresponding to the first scan electrode group) and a scan electrode group 8 (corresponding to the second scan electrode group), and a signal crossing the scan electrode A pixel portion of the liquid crystal display element is configured by the signal electrode divided into two parts, the electrode group 5 and the signal electrode group 6. The scan electrode group 7 is given a scan signal by the first scan drive circuit 3, and the scan electrode group 8 is given a scan signal by the second scan drive circuit 4. Each scanning electrode constituting the scanning electrode group 7 is sequentially selected and given a scanning signal, and in synchronization with this, a data signal is given to the signal electrode group 1 by the first data driving circuit 1. At the same time, the scanning electrodes constituting the scanning electrode group 8 are sequentially selected and given a scanning signal, and in synchronization with this, a data signal is given to the signal electrode group 6 by the second data driving circuit 2.

  When the liquid crystal display element is a simple matrix type liquid crystal display element, the scan electrode group 7 and the scan electrode group 8 are formed on the liquid crystal layer side of one transparent substrate, and the signal electrode group 5 and the signal electrode group 6 are the other. It is formed on the liquid crystal layer side of the transparent substrate. A pixel including a liquid crystal layer is formed at each intersection of the scan electrode and the signal electrode.

  When the liquid crystal display element is an active matrix type liquid crystal display element using TFTs or the like, the scan electrode group 7, the scan electrode group 8, the signal electrode group 5 and the signal electrode group 6 are arranged on the liquid crystal layer side of one transparent substrate. A common electrode is formed on the liquid crystal layer side of the other transparent substrate. A TFT and a pixel electrode are formed at each intersection of the scanning electrode and the signal electrode, and a pixel is constituted by a liquid crystal layer corresponding to the pixel electrode. When the liquid crystal display element is an active matrix type liquid crystal display element using a two-terminal element, the scanning electrode group 7 (signal electrode group 5) and the scanning electrode group 8 (signal electrode group 6) are arranged on the liquid crystal layer side of one transparent substrate. ) And the signal electrode group 5 (scanning electrode group 7) and the signal electrode group 6 (scanning electrode group 8) are formed on the liquid crystal layer side of the other transparent substrate. An MIM and a pixel electrode are formed at each intersection of the scan electrode and the signal electrode, and a pixel is constituted by a liquid crystal layer corresponding to the pixel electrode.

  The scan electrode group 7 is selectively scanned line-sequentially in the direction of the scan direction 9 from the center of the display unit upward by the first scan drive circuit 3. The scan electrode group 8 is scanned line-sequentially downward from the center of the display unit in the direction of the scan direction 10 by the second scan drive circuit 4 in synchronization with the scan of the scan electrode group 7 in parallel. That is, each scanning electrode is sequentially scanned in synchronization toward the outer periphery so as to be separated from the center of the display unit.

  A data signal is given to the signal electrode group 5 and the signal electrode group 6 by the first data driving circuit 1 and the second data driving circuit 2 in synchronization with the scanning signals of the scanning electrode group 7 and the scanning electrode group 8. Then, data signals are sequentially written to the corresponding pixels.

  The luminance change 11 and the luminance change 12 indicate the luminance change (or display density change) when the same data signal is written in the corresponding pixel at the position of each scanning electrode. The luminance is higher as it is located on the right side and lower as it is located on the left side. In the present embodiment, scanning is performed from the central portion toward the peripheral portion. For this reason, the luminance (or display density) of the central portion scanned early is high, and the luminance decreases toward the peripheral portion scanned late. However, since the scan electrodes are scanned in parallel by the first scan drive circuit 3 and the second scan drive circuit 4, when the frame frequency is constant, the selection period during which one scan electrode is selected is The length is twice that of the case where no division scanning is performed. That is, the writing time is twice as long. As a result, the luminance difference between the luminance of the pixel at the center of the display section scanned first and the luminance of the pixel at the periphery of the display section scanned last decreases. Furthermore, since there is no luminance difference between pixels at the boundary between the scan electrode group 7 and the scan electrode group 8, display quality is not deteriorated. In addition, since the luminance difference between the pixels of the entire display portion is reduced, the occurrence of flicker is also reduced.

  When the display unit of the liquid crystal display device shown in FIG. 1 is driven by the field sequential method, the above effect becomes more remarkable. In the driving by the field sequential method, for example, in the R field period in which an image corresponding to the red color (R) is displayed on the liquid crystal display element, the liquid crystal display element is irradiated with red light from the light source, and the green color (G ) In a G field period in which an image corresponding to) is displayed on the liquid crystal display element, the liquid crystal display element is irradiated with green light from the light source, and a B field is displayed on the liquid crystal display element corresponding to the blue color (B). During this period, the liquid crystal display element is irradiated with blue light from the light source, and these three color images are switched and displayed within the period of one frame to obtain a full color image by time mixing.

  In the case of driving by the field sequential method, since multi-color display can be performed with one pixel, the number of pixels can be reduced to 1/3 compared with the case where a color filter is used. On the other hand, since it is necessary to display three images of different colors within one frame period, extremely high speed driving is required. Therefore, by dividing the scan electrode into the scan electrode group 7 and the scan electrode group 8 and scanning in parallel, the scan period for scanning one screen can be shortened to ½.

  As already described, in the driving by the field sequential method, it is necessary to prevent the data written in each pixel in the previous field from remaining in the next field. This is because the color balance is lost if a write signal remains across the field because it is a method of obtaining a color display by time mixing. Therefore, a reset period is provided for each field (see FIG. 6). By providing this reset period, the pixel corresponding to the scan electrode that is scanned first has a high luminance because the display period is long, and the pixel corresponding to the scan electrode that is selected last is short because the display period is short. It shows a tendency for the brightness to decrease.

  However, the scanning electrode group 7 and the scanning electrode group 8 are divided into the scanning electrode group 7 and the scanning electrode group 8, and the scanning electrodes 7 and 8 are scanned by scanning in the scanning directions separated from each other from the central portion of the display portion to the peripheral portion. It is possible to prevent a luminance difference from occurring at the boundary portion. Further, when the selection period of one scan electrode is equal to the case of scanning without division, the scanning period for scanning one screen is shortened to ½. As a result, the time difference between the display period of the pixel corresponding to the scan electrode scanned first (see FIG. 6) and the display period of the pixel corresponding to the scan electrode scanned last is not divided. Compared to As a result, the luminance difference between pixels in the entire screen is also reduced.

  In addition, although the case where the scanning direction of the scanning electrode scans from the central portion of the screen toward the peripheral portion has been described, the same effect can be obtained by scanning in the scanning direction that converges from the peripheral portion to the central portion. Can do.

  FIG. 2 is a schematic diagram showing a display unit of a liquid crystal display device in which the scan electrode group is divided into four parts and the luminance change thereof. The same functions or elements as those in FIG. 1 are denoted by the same reference numerals. The scan electrode is divided into four, the scan drive circuit 21 converts the scan electrode group 7a, the scan drive circuit 22 scans the scan electrode group 7b, the scan drive circuit 23 scans the scan electrode group 8a, and the scan drive circuit 24 scans the scan electrode group. A scan signal is given to 8b and scanned. Data signals are applied to the signal electrodes corresponding to the scan electrode groups 7a and 7b by the first data driving circuit 1, and the data signals are applied to the signal electrodes corresponding to the scan electrode groups 8a and 8b by the second data driving circuit 2. Is given.

  Adjacent scan electrode groups are scanned in opposite directions. That is, the scan electrode group 7a is scanned upward, the scan electrode group 7b is scanned downward, the scan electrode group 8a is scanned upward, the scan electrode group 8b is scanned downward, line-sequentially in parallel during the same field period. Is done. As a result, as shown by luminance changes 11a, 11b, 12a, and 12b in FIG. 2, the boundary between the scan electrode group 7a and the scan electrode group 7b, the boundary between the scan electrode group 7b and the scan electrode group 8a, and the scan electrode group There is no luminance difference between adjacent pixels at the boundary between 8a and the scan electrode group 8b. As a result, it is possible to suppress deterioration in display quality due to a luminance difference at these boundaries. In addition, if it is assumed that the selection period of one scan electrode is equal to the case of scanning without division, the scan period in one field is shortened to ¼, so that the pixel corresponding to the scan electrode to be scanned first is The time difference of the display period in the pixel corresponding to the scan electrode scanned last is reduced. As a result, the luminance difference between the pixels is reduced, and the occurrence of flicker is also suppressed.

  FIG. 3 is a schematic view of the display unit in which the X part shown in FIG. 2 is enlarged. The same functions or elements are given the same reference numerals. A TFT 34 and a pixel electrode 33 are formed at each intersection of the scanning electrode and the signal electrode. The scan electrodes are separated into a scan electrode group 7a and a scan electrode group 7b. An odd signal electrode group 31 is formed corresponding to the scan electrode group 7a, and an even signal electrode group 32 is formed corresponding to the scan electrode group 7b, and a data signal is supplied from the first data driving circuit 1. The gate of the TFT 34 is connected to the scanning electrode, the source of the TFT 34 is connected to each signal electrode of the odd signal electrode group 31 or the even signal electrode group 32, and the drain of the TFT 34 is connected to the pixel electrode 33. When a scan electrode is selected and a scan signal is given, the source and drain of the TFT connected to the scan electrode are brought into conduction. During the selection period in which the TFT is conducting, a data signal is given from the first data driving circuit 1 to the odd signal electrode group 31 and the even signal electrode group 32, and the data signal is written to each pixel electrode 33 through the conducting TFT. It is. The scanning electrodes are sequentially selected and scanned, and data signals are written to all the pixel electrodes 33 so that the display operation of the liquid crystal display element is performed. In this case, the scan electrode group 7a and the scan electrode group 7b are scanned in opposite directions. For example, the scanning is sequentially performed in synchronization with the direction in which the scanning electrodes are separated from the boundary between the scanning electrode group 7a and the scanning electrode group 7b. Alternatively, scanning is performed toward the boundary between the scan electrode group 7a and the scan electrode group 7b so as to approach each other.

  FIG. 4 is a schematic partial cross-sectional view showing a cross section of the liquid crystal display device taken along line YY ′ of FIG. 3. The same functions or elements are given the same reference numerals. The liquid crystal display device includes a liquid crystal display element 40, polarizing plates 41 a and 41 p arranged so as to sandwich the liquid crystal display element 40, and a light guide plate 47 and a light source 46 for irradiating the liquid crystal display element 40 with light. . The liquid crystal display element 40 has a liquid crystal layer 44 sandwiched between an upper transparent substrate 42 and a lower transparent substrate 45. A common electrode 43 is formed on the liquid crystal layer 44 side of the upper transparent substrate 42. On the liquid crystal layer 44 side of the lower transparent substrate 45, an even signal electrode group 32, an insulating film 49 on the even electrode group 32, and an odd signal electrode group 31 and a pixel electrode 33 are formed on the insulating film 49. In addition, a light diffusing surface 48 is formed on the surface of the light guide plate 47 so that light introduced from the light source 46 to the light guide plate 47 is emitted upward. An optical sheet made of a prism sheet or the like may be provided between the light guide plate 47 and the polarizing plate 41p. When the liquid crystal display element is of a field sequential type, the light source 46 is provided with a light source that emits R, G, and B colors.

  In the above description of the embodiment, the case where the scan electrode is divided into two or four has been described. However, this is divided into three, five, and further divided, and the scanning directions of adjacent scan electrode groups are opposite to each other. Such cases are also included in the scope of the present invention.

It is the schematic showing the display part of the liquid crystal display device which concerns on this invention. It is the schematic showing the display part of the liquid crystal display device which concerns on this invention. It is the schematic showing the display part which expanded the X section shown in FIG. FIG. 4 is a schematic partial cross-sectional view illustrating a cross section of a YY ′ portion in FIG. 3. It is the schematic showing the display part of the conventional liquid crystal display device. It is explanatory drawing for demonstrating the drive by the conventional field sequential system.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 1st data drive circuit 2 2nd data drive circuit 3 1st scan drive circuit 4 2nd scan drive circuit 5, 6 Signal electrode group 7, 8 Scan electrode group 9, 10 Scan direction 11, 12 Luminance change 21,22, 23, 24 Scan driving circuit

Claims (4)

A liquid crystal display element having a pixel at each intersection of a plurality of scan electrodes and a plurality of signal electrodes; a scan drive circuit for sequentially selecting the scan electrodes and providing a scan signal; and the signal in synchronization with the scan signal In a liquid crystal display device comprising a data driving circuit for applying a data signal to an electrode and writing to the pixel corresponding to the signal electrode,
The scan electrodes are divided into a plurality of scan electrode groups, and among the plurality of scan electrode groups, one scan electrode group and another scan electrode group adjacent to the one scan electrode group are in the same period. A liquid crystal display device, wherein the liquid crystal display devices are sequentially selected in opposite directions.   2. The liquid crystal display device according to claim 1, wherein the one scan electrode group and the other one scan electrode group are sequentially selected from scan electrodes that are close to each other in a direction of scan electrodes that are separated from each other. .   A light source that emits light of a plurality of colors, and the liquid crystal display element emits light of the one color from the light source to the liquid crystal display element during a field period in which an image corresponding to the color is displayed. The light of the other color is emitted from the light source during a period in which the liquid crystal display element displays an image corresponding to the other color. Liquid crystal display device. A liquid crystal display element having a pixel at each intersection of a plurality of scan electrodes and a plurality of signal electrodes; a scan drive circuit for sequentially selecting the scan electrodes and providing a scan signal; and the signal in synchronization with the scan signal In a driving method of a liquid crystal display device comprising: a data driving circuit for supplying a data signal to an electrode and writing to the pixel corresponding to the signal electrode, wherein the scanning electrode is divided into a plurality of scanning electrode groups;
The scan driving circuit includes:
Sequentially selecting one scan electrode group of the plurality of scan electrode groups to provide a scan signal;
The other scan electrode group adjacent to the one scan electrode among the plurality of scan electrode groups is sequentially selected in synchronization with a scan signal applied to the one scan electrode group. A method of driving a liquid crystal display device, characterized in that a scanning signal is given by sequentially selecting a scanning direction opposite to the scanning direction.

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