JPH02126225A - Liquid crystal device - Google Patents

Abstract

PURPOSE:To suppress flicker generation due to scan driving of low frame frequency by applying nonadjacent scanning electrodes with a leading scan select signal V1 and a trailing scan select signal -V2 about a voltage applied to unselected scanning electrodes as a reference voltage, and making a non-image- plane scan. CONSTITUTION:A liquid crystal element has a matrix electrode formed of a scanning electrode Cn and information electrodes 11A and 11B and the scan select signal is applied to every 3rd scanning electrode; and the scan select signal is applied to nonadjacent scanning electrodes in four successive fields and a non-frame scan (one-image-plane scan) is made. Consequently, a scan select period is set long at a low temperature to suppress the generation of a flicker due to the scan driving of low frame frequency. Further, two successive scan select signals are so applied that the leading pulse (voltage -V2) of the following scan select signal is applied simultaneously with the trailing pulse (voltage V1) of the leading scan select signal and the leading scan select signal is applied before the entry end of an information signal entered relatively to the leading scan select signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a display device using ferroelectric liquid crystal, and particularly to a display device suitable for gradation display in which flicker is not noticeable.

[Conventional technology]

Conventionally, liquid crystal display elements are well known in which a scanning electrode group and a signal electrode group are configured in a matrix, and a liquid crystal compound is filled between the electrodes to form a large number of pixels to display images or information. . The driving method for this display element is time-division driving, in which an address signal is selectively and periodically applied to a group of scanning electrodes, and a predetermined information signal is selectively applied in parallel to a group of signal electrodes in synchronization with the address signal. It has been adopted.

Most of these were put to practical use, for example, in “Applied Fix Letters” (“Applied Phys Letters”).
sics Letters”) 1971, 18 (4
) No. 127-128, M, Shut (M, 5c)
hadt and W, Helfrich.
Co-authored “Voltage Dependant Optical Activity of a Twisted Nematic Liquid Crystal” (“Voltage
Dependent Optical Activit
y of a Twisted NemattcLiq
TN (Tw
It was a Nematic) type liquid crystal.

In recent years, the use of bistable liquid crystal elements as an improved version of conventional liquid crystal elements has been proposed by both C1ark and Lagerwall in Japanese Unexamined Patent Publication No. 5
This method has been proposed in Japanese Patent No. 6-107216, US Pat. No. 4,367,924, and the like. Ferroelectric liquid crystals having a chiral smectic C phase (SmC*) or a (SmH phase) are generally used as bistable liquid crystals, and in these states, the first phase changes in response to an applied electric field. It has the property of being in either an optically stable state or a second optically stable state and maintaining that state when no electric field is applied, that is, it has bistability, and it also has a quick response to changes in the electric field. , and is expected to be widely used in fields such as high-speed and memory-type display devices.

However, the above-mentioned ferroelectric liquid crystal element has a problem in that flicker occurs when driving the multi-flex screen. In particular, in European Publication No. 149899, an alternating current voltage with the phase of the scanning selection signal inverted is applied for each writing frame, and white (crossed nicols arranged so as to be in a bright state) selective writing is performed in the previous frame. conduct,
A multi-blend shift driving method is disclosed in which selective writing of black (cross nicols are arranged so as to be in a dark state) is performed in the subsequent frame. In addition to the above-mentioned driving method, U.S. Pat.
Driving methods disclosed in Japanese Patent No. 548,476 and US Pat. No. 4,655,561 are known.

In such a driving method, during black selective writing after white selective writing, the white pixel that was selectively written in the previous frame becomes half-selected, and a smaller but effective voltage than the writing voltage is applied. Therefore, in this multiplex puff drive method, when writing black selection, a half-selection voltage is uniformly applied to the white selection pixels that form the background of black characters at a 1/2 frame period (one frame scanning time). The optical characteristic of the white selected pixel to which the half selection voltage is applied changes every 1/2 frame period. Therefore, in the case of a display in which black characters are written on a white background, the number of pixels that select white is overwhelmingly larger than the pixels that select black, and the white background appears to flicker. Further, in contrast to the above-mentioned display in which black characters are written on a white background, flickering is also observed in the case of a display in which white characters are written on black characters. When the normal frame frequency is 30 Hz, the half-select voltage described above is applied at 15 Hz, which is the 1/2 frame frequency, which is perceived by the viewer as flickering, which significantly impairs display quality.

In particular, when driving ferroelectric liquid crystals at low temperatures, it is necessary to make the drive pulse (scan selection period) longer than, for example, when driving a 15 Hz frame frequency scan drive at high temperatures.
For this reason, it was necessary to use scanning drive at a low frame frequency such as 5 to 10 Hz. Therefore, when driving at low temperatures, flicker occurs due to scan driving at a low frame frequency.

[Summary of the invention]

An object of the present invention is to provide a liquid crystal device that suppresses the occurrence of flicker caused by scanning drive at a low frame frequency, and another object of the present invention is to provide a liquid crystal device that realizes gradation display without flicker. There is a particular thing.

Another object of the present invention is to provide a liquid crystal device that prevents image deletion from occurring.

The present invention provides, firstly, a) a liquid crystal element having a matrix electrode formed of a scan electrode and an information electrode and a ferroelectric liquid crystal; One vertical scan is performed by serially applying a scan selection signal having one polarity voltage at the front and the other polarity at the rear, based on the applied voltage, and after two successive front and rear scan selection signals, Start applying the one polarity voltage of the scan selection signal to the scan electrode before the application of the information signal related to the previous scan selection signal ends and after the application of the other polarity voltage of the previous scan selection signal. applying to all or a predetermined number of information electrodes a voltage signal that provides a voltage that causes one orientation state of the ferroelectric liquid crystal by combining a scanning selection signal with the one polarity voltage; Driving means having a second means for applying a voltage signal to the selected signal electrode to apply a voltage that causes the other orientation state of the ferroelectric liquid crystal to be generated by combining the scanning selection signal with the other polarity voltage. A. A liquid crystal device having a matrix electrode formed of a scanning electrode and an information electrode and a ferroelectric liquid crystal; With reference to the voltage applied to the unselected scan electrode, a scan selection signal having one polarity voltage at the front and the other polarity at the rear is applied in an interlaced manner every two or more times, and one vertical scan is performed multiple times. One vertical scan is performed, and among two consecutive previous and subsequent scan selection signals, the one polarity voltage of the later scan selection signal is applied before the end of application of the information signal related to the previous scan selection signal, and before the end of application of the information signal related to the previous scan selection signal, a first means for starting application of the scan selection signal to the scan electrodes after applying the other polarity voltage, and combining the scan selection signal with the negative polarity voltage to all or a predetermined number of information electrodes; A voltage signal is applied to the selected signal electrode to provide a voltage that causes one orientation state of the ferroelectric liquid crystal, and by combining the scan selection signal with the other polarity voltage, the other orientation state of the ferroelectric liquid crystal is applied. A liquid crystal device has a second feature, the liquid crystal device having a driving means having a second means for applying a voltage signal that provides a voltage that produces an alignment state, thirdly, a. having a scanning electrode and an information electrode; a matrix electrode in which a plurality of electrodes constituting at least one of the scanning electrode and the information electrode are wired with at least two different electrode widths;
and a liquid crystal element having a ferroelectric liquid crystal, and b. a scan selection having non-adjacent scan electrodes with polar voltages, one before and the other after, with reference to the applied voltage to the unselected scan electrodes. Apply the signal serially,
After performing one vertical scan, and after two successive previous and subsequent scan selection signals, the one polarity voltage of the subsequent scan selection signal is before the end of application of the information signal related to the previous scan selection signal;
and a first means for starting application to the scan electrodes after the application of the other polarity voltage of the previous scan selection signal, and applying the voltage to all or a predetermined number of information electrodes to the one polarity voltage of the scan selection signal A voltage signal is applied to the selected signal electrode to provide a voltage that causes one orientation state of the ferroelectric liquid crystal through synthesis, and the other orientation state of the ferroelectric liquid crystal is applied to the selected signal electrode by combining with the other polarity voltage of the scan selection signal. A third feature is provided in a liquid crystal device having a driving means having a second means for applying a voltage signal that provides a voltage that produces an alignment state of.

[Detailed description of aspects of the invention]

An embodiment of the present invention will be described using a ferroelectric liquid crystal (hereinafter referred to as FLC).

FIG. 1 shows a first embodiment of the present invention (FIG. 2 shows A-A in FIG. 1).
A' is a sectional view), and the upper electrode group 11A and I
The IB (hereinafter referred to as information electrode group) and the lower electrode group 12 (hereinafter referred to as scanning electrode group C) are configured to form a matrix with each other,
They are formed on glass substrates 13 and 14, respectively, and have a structure in which an FLC material 15 is sandwiched between them. or,
As shown in the figure, the scanning electrode group C is Co, C, C2...,
Information electrode groups are A (AI + A2 + A3...) and B
(B l+ 82, 133, 134...), and one pixel consists of the area E (electrode line width) surrounded by the dotted line in the figure.
A>B), that is, for example, the scanning electrode C2 and the information electrodes A2 and B2 are formed in an area E where they overlap. At this time,
The electrode line width is A>B. Each scanning electrode group C and information electrode group A-B is connected to a power supply unit (not shown) via a SW, and the SW also has a controller circuit (not shown) that controls the 0N10FF. is connected to. With this configuration, under the control from the controller circuit, for example, grayscale expression at pixel E is performed as follows. When the common electrode C2 is being scanned, white (
Below W) is A2. When B2 is given a signal that becomes W, gray 1 (hereinafter referred to as Grayl) becomes gray 2 (hereinafter referred to as Gr) when a signal that becomes black (hereinafter referred to as B) is given to A2 and W1B2.
ay2) is when A2 is given a W signal to B5B2, black is A2. When a signal that becomes B is applied to B2, FIG. 3 shows the above-mentioned W and Grayl.

It shows the halftone expression of Gray2 and B.

With such a simple configuration, it is possible to express a four-value gray scale on a binary expression FLC.

In a preferred embodiment of the present invention, the plurality of intersections constituting one pixel E are configured with different intersection areas, and in particular, the different intersection areas are 2:
The ratio is preferably 4:8:16:=-:2' (n=number of intersections in one pixel E).

In the present invention, the scanning electrode is divided into two, and when the electrode line width C=B, 8 gradation levels are possible, and when CI=D, 16 gradation levels are possible.

Furthermore, when only the information electrode side is divided, the electrode line width A=B, and color filters are provided on A and B so that they have a complementary color relationship, thereby making it possible to display four colors. For example (A=yellow; B=nibble, CA=magenta; B=
By arranging the complementary colors of Nibreen or (A=cyan; B=Nirerad), four-color display of white, black, color A, and color B becomes possible.

Further, the polarizers 16A and 16B shown in FIG. 2 are arranged with their polarization axes intersecting, and a black display is made in a dark state, and a white display is made in a bright state.

Although the matrix electrode shown in FIG. 1 is driven by the driving example described above, the present invention can also be applied to a matrix electrode formed of a scanning electrode and an information electrode having the same electrode width.

FIG. 4(A) shows the scan selection signal S S , the scan non-selection signal S N s, the white information signal Iw, and the black information signal IB. FIG. 4(B) shows a pixel on the scan selection electrode to which the scan selection signal is applied (the intersection of the scan electrode and the information electrode).
The voltage waveform applied to the selected pixel (the pixel to which the white information signal 1w is applied and the voltage (Iw Ss) is applied), and the voltage waveform applied to the unselected pixel (the black information signal ■) on the same scan selection electrode
The voltage waveforms applied to the pixel to which the voltage (IB SS) is applied and the voltage waveforms applied to the two types of pixels on the scan non-selection electrode to which the scan non-selection signal is applied are shown. has been done.

According to FIGS. 4A and 4B, the phase T can cause one orientation state of the ferroelectric liquid crystal, regardless of the type of information pulse. In this case, in this example, crossed nicols are set so that a black display based on a dark state is produced when the ferroelectric liquid crystal is in one alignment state, but crossed nicols may be set so as to produce a bright state. . Further, among the phases T, the previous phase t is a phase to which a part of the information signal applied in relation to the previous scanning selection signal is applied.

At phase t3, the voltage = (V r +V 3 ) is applied to the selected pixel on the scan selection electrode to which the scan selection signal is applied.
is applied to produce the other orientation state of the ferroelectric liquid crystal,
After being erased to black display in phase T, white display is performed based on the bright state. On the other hand, a voltage -(V+V 3 ) is applied to other pixels (non-selected pixels) on the scan selection electrode, but since it is set to a voltage that does not change the alignment state of the ferroelectric liquid crystal, the phase T1 White display is maintained even in phase t3. Furthermore, a voltage ±v3 that does not change the alignment state of the ferroelectric liquid crystal is applied to the pixel on the scan non-selection electrode to which the scan non-selection signal is applied, and therefore the ferroelectric liquid crystal has a memory effect. , - The write state will remain unchanged during the field or one frame scanning period.

Further, in this example, at phase t2, a pulse of opposite polarity to the information pulse at write phase t3 is applied from the information electrode. Therefore, as shown in FIG. 4(C), an AC voltage is applied to the pixels when scanning is not selected, and the threshold characteristics of the ferroelectric liquid crystal can be improved.

FIG. 4(C) shows the display state shown in FIG.
Fig. 10 shows a timing chart of voltage waveforms for generating S8). In this example, the scanning selection signal is
An interlace signal is applied to the scan electrodes every other book, and a scan selection signal is applied to non-adjacent scan electrodes in four consecutive fields. In this example, every third scanning electrode is selected, and four scanning electrodes are selected.
1 frame scan (1 vertical scan) in 1 field scan
By doing this, the scan selection period (1,
+12+t3) is set long, and as a result, even in low frame frequency scan driving (for example, a frame frequency of 5 to tOHz), it is possible to significantly suppress the occurrence of flicker caused by low frame frequency scan driving. Furthermore, by applying a scan selection signal to select non-adjacent scan electrodes in four consecutive field scans, image deletion could be effectively eliminated.

FIG. 4(D) is an example using the drive waveform of FIG. 4(A). In this example, scanning electrodes are selected in an intermittent manner every five scanning electrodes, and adjacent scanning electrodes are selected in six consecutive field scans. A scan selection signal was applied to select the scan electrodes that were not present.

In addition, in the drive example shown in FIGS. 4(C) and (D), of the two consecutive scan selection signals, the front pulse (voltage -V2) of the later scan selection signal is the rear pulse of the previous scan selection signal. (voltage V+) is applied simultaneously.

Also, in this example, lV+ l=l Vz! =31±v
Although the scanning pulse and the information pulse are used in the relationship of 31 and t, = t2 = t3, the relationship is not necessarily limited to the above-mentioned relationship, for example, 1VII=l-V2=
It may also be al±v3t (a≧2).

FIGS. 6A and 6B show another driving example used in the present invention. According to FIGS. 6(A) and (B), all or a predetermined number of pixels on the scanning selection electrode are erased to black display regardless of the type of information signal in phase T, and selected pixels are erased in writing phase t3. A voltage that causes white display is applied to the pixel, and a voltage that maintains black display is applied to the other pixels. Also, similar to the previous example, phase t4 is a phase in which an auxiliary signal is applied from the information electrode in order to constantly apply an AC voltage to the pixel when it is not selected. applied. The effects produced by applying such an auxiliary signal are disclosed, for example, in US Pat. No. 4,655,561.

FIG. 6(C) is an application timing chart of the scan selection signal when the drive waveforms of FIGS. 6(A) and (B) are used (the display state is shown at 51-38 in FIG. 5). . According to the driving example shown in FIG. 6(C), the scan selection signal is applied to the scan electrodes at every third scan electrode, and one frame scan is completed by four field scans. Also in this example, scan selection signals are applied to non-adjacent scan electrodes in four consecutive field scans. Also, according to FIG. 6(C), of the two consecutive scan selection signals, the front pulse (voltage -V2) of the later scan selection signal is equal to the rear pulse (N voltage V+) of the previous scan selection signal. Applied immediately after application.

FIGS. 7(A) and 7(B) are other examples of drive waveforms.

According to FIGS. 7A and 7B, phase T has the same effect as the erase phase used in the previous example, and phase t3 has the same effect as the write phase in the previous example. Further, the phases t2 and t4 correspond to the auxiliary signals used in the previous example, and it is possible to constantly apply an AC voltage to the pixels when they are not selected, and it is possible to improve the threshold characteristics of the ferroelectric liquid crystal. Further, a part of the information signal entered in relation to the previous scan selection signal is applied to the phase t.

FIG. 7(C) is an application timing chart of the scan selection signal when the drive waveforms of FIGS. 7(A) and (B) are used (the display state is shown at 81 to S12 in FIG. 5). . 7th
According to the driving example shown in Figure (C), the scan selection signal is applied to the scan electrodes in an interlaced manner every fifth field, and one frame scan is completed by six field scans. Also in this example, scan selection signals are applied to non-adjacent scan electrodes in six consecutive field scans. Also, according to FIG. 6 CC), of the two consecutive scan selection signals, the front pulse (voltage V2) of the later scan selection signal is immediately after the application of the rear pulse (voltage V + ) of the previous scan selection signal. is applied to

In the driving examples shown in FIGS. 4, 6, and 7 described above, 2
Of two consecutive scan selection signals, the previous scan selection signal is applied at or immediately after the application of the previous scan selection signal, while the previous scan selection signal is entered in relation to the previous scan selection signal. The subsequent scan selection signal is applied before the entry of the information signal is completed.

The present invention is not limited to the above-mentioned example, and in particular, the scan selection signal can be applied to the scan electrodes every four or more scan electrodes, preferably every five to 20 scan electrodes in an interlaced manner. Further, in the present invention, the voltage signal v8. -■ and ±v3 peak values IV
+ I=l V21>l±v3 preferably lV+l
=l V21>21+V3 It is better to set I.

Furthermore, the pulse width of these voltage signals is generally lμsec.
~1 m5ec, preferably 10μsec ~ 100μ
sec, and it is preferable to set the pulse width at low temperatures to be longer than the pulse width at high temperatures.

Note that P1 to P12 in FIG. 5 represent one-tone pixels formed by two pixels having different pixel areas.

In the present invention, various types of ferroelectric liquid crystal elements can be used. Specifically, 5SFLC disclosed by Clark et al. in U.S. Patent No. 4,367,924, etc.
and Isogai et al. in U.S. Pat. No. 4,586,791, or a ferroelectric liquid crystal device in an aligned state with a helical residue as disclosed in British Publication No. 2,159,635. Can be used.

FIG. 8 is a configuration diagram showing an example of a display device of the present invention. 8
01 is a display panel, which has scanning electrodes 802 and information electrodes 803.
and ferroelectric liquid crystal filled between them, and at the intersection of the matrix consisting of the scanning electrode 802 and the information electrode 803, the orientation of the ferroelectric liquid crystal is caused by the electric field caused by the voltage applied to the electrode. controlled.

Reference numeral 804 denotes an information electrode drive circuit, which includes a video data shift register 8041 that stores serial video data from the video information signal line 806;
Line memory 8 that stores parallel video data from
042, an information electrode driver 8043 for applying a voltage to the information electrode 803 according to the video data stored in the line memory 8042, and a voltage V to be applied to the information electrode 803; , O and -VD by a signal from a switching control line Stt.

Reference numeral 805 is a scan electrode drive circuit, and a scan address data line 8
Decoder 8051 and decoder 80 for receiving the signal from 07 and instructing one scan electrode among all the scan electrodes.
A scan electrode driver 8052 for applying a voltage to the scan electrode 802 in response to a signal from the scan electrode 802;
Voltage applied to 02 vs, 0. -v.

It has a scanning side power switch 8053 which switches the power supply by a signal from the switching control line 811.

808 is a CPU which receives clock pulses from an oscillator 809 and controls an image memory 810 and a video information signal line 806.
．． Scanning address data line 807. Controls the transfer of signals to the switching control line 811.

[°Effect of invention]

According to the present invention, it is possible to effectively suppress the occurrence of flicker caused by scan drive at a low frame frequency such as 2 Hz to 15 Hz, and even during a long scan selection period at low temperatures. , it is possible to obtain a high-quality display screen over a substantially wide temperature range without the occurrence of flicker. Further, according to the present invention, image distortion can be effectively prevented, and in this sense, a high-quality display screen can be obtained.

[Brief explanation of drawings]

FIG. 1 is a plan view of a matrix electrode used in the present invention. Figure 2 shows the A-
A' is a sectional view. FIG. 3 is an explanatory diagram schematically showing halftones. FIGS. 4(A) to 4(D) are waveform diagrams showing examples of drive waveforms used in the present invention. FIG. 5 schematically shows the display state of the matrix electrode, and FIG. 7 (A) to (Good) are waveform diagrams showing other drive waveform examples used in the present invention. 8th
The figure is a block diagram of the invention.

Claims (24)

[Claims] (1) a. A liquid crystal element having a matrix electrode formed by a scanning electrode and an information electrode and a ferroelectric liquid crystal, and b. A voltage applied to non-selected scanning electrodes to non-adjacent scanning electrodes. and serially apply a scan selection signal having one polarity voltage at the front and the other at the rear to perform one screen scan, and after two consecutive front and rear scan selection signals, the latter scan selection signal The first polarity voltage starts to be applied to the scan electrode before the application of the information signal related to the previous scan selection signal ends and after the application of the other polarity voltage of the previous scan selection signal. applying a voltage signal to the means and all or a predetermined number of information electrodes to provide a voltage that causes one orientation state of the ferroelectric liquid crystal by combining the scanning selection signal with the one polarity voltage, and applying a voltage signal to all or a predetermined number of information electrodes; A liquid crystal device comprising a driving means having a second means for applying a voltage signal to the electrode, which applies a voltage that causes the other orientation state of the ferroelectric liquid crystal by combining the scan selection signal with the other polarity voltage. (2) The liquid crystal device according to claim 1, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (3) The liquid crystal device according to claim 1, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed. (4) a. A liquid crystal element having a matrix electrode formed of a scanning electrode and an information electrode and a ferroelectric liquid crystal, and b. Application of voltage to a scanning electrode that is not selected within one vertical scanning period. With reference to the voltage, a scan selection signal having one polarity voltage at the front and the other polarity at the rear is applied in an interlaced manner every two or more lines, one screen is scanned by one vertical scan multiple times, and two consecutive front scans are performed. and the later scan selection signal, before the one polarity voltage of the later scan selection signal ends the application of the information signal related to the previous scan selection signal, and when the other polarity voltage of the previous scan selection signal is applied. Later, a first means for starting an application to the scan electrodes and all or a predetermined number of information electrodes produces one orientation state of the ferroelectric liquid crystal by combining a scan selection signal with said one polarity voltage. applying a voltage signal that provides a voltage that causes the ferroelectric liquid crystal to be in the other orientation state by combining the scanning selection signal with the other polarity voltage of the scanning selection signal; A liquid crystal device having a driving means having a second means. (5) The liquid crystal device according to claim 4, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (6) The liquid crystal device according to claim 4, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed. (7) The liquid crystal device according to claim 4, wherein the first means includes means for applying a scan selection signal to the scan electrodes in an interlaced manner every fourth or more times within one vertical scanning period. (8) The liquid crystal device according to claim 4, wherein the first means includes means for applying a scan selection signal to the scan electrodes in an interlaced manner every 5 to 20 lines within one vertical scanning period. (9) The first means interlacely applies a scan selection signal to the scan electrode every N signals (N=an integer of 2, 3, 4, . . . ) within one vertical scanning period, and ( 5. The liquid crystal device according to claim 4, further comprising means for performing one screen scan in one vertical scan of N+1) times. (10) a. A liquid crystal element having a matrix electrode and a ferroelectric liquid crystal formed by a scanning electrode and an information electrode, and b. Application of voltage to an unselected scanning electrode within one vertical scanning period. With reference to the voltage, a scan selection signal having one polarity voltage at the front and the other polarity at the rear is applied in an interlaced manner every two or more lines, one screen is scanned by one vertical scan multiple times, and at least two consecutive scans are performed. Scan selection signals are applied to non-adjacent scan electrodes in vertical scanning, and among the two consecutive previous and subsequent scan selection signals, the one polarity voltage of the later scan selection signal is related to the previous scan selection signal. a first means for starting application to the scan electrodes before the end of application of the information signal and after the application of the other polarity voltage of the previous scan selection signal; A voltage signal is applied to the selected signal electrode to provide a voltage that causes the ferroelectric liquid crystal to be in one orientation state by combining the selection signal with the other polarity voltage of the scanning selection signal. A liquid crystal device having a driving means having a second means for applying a voltage signal which provides a voltage which causes the other alignment state of the ferroelectric liquid crystal to occur upon synthesis. (11) The liquid crystal device according to claim 10, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (12) The liquid crystal device according to claim 10, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed. (13)a, a matrix electrode having a scanning electrode and an information electrode, in which a plurality of electrodes constituting at least one of the scanning electrode and the information electrode are wired with at least two different electrode widths; a liquid crystal element having polarity liquid crystal, and b. Serially transmitting a scan selection signal having one polarity voltage at the front and the other polarity at the rear, with reference to the voltage applied to the unselected scan electrode, to non-adjacent scan electrodes. is applied to perform one screen scan, and after two successive previous and subsequent scan selection signals, the one polarity voltage of the subsequent scan selection signal indicates the end of application of the information signal related to the previous scan selection signal. a first means for starting application of the other polarity voltage of the scan selection signal to the scan electrodes before and after the application of the other polarity voltage of the scan selection signal to all or a predetermined number of information electrodes; A voltage signal is applied that gives a voltage that causes one orientation state of the ferroelectric liquid crystal when combined with the voltage, and the ferroelectric liquid crystal is applied to the selected signal electrode by combining the scan selection signal with the other polarity voltage. A liquid crystal device having driving means having second means for applying a voltage signal that provides a voltage that causes the other orientation state of the liquid crystal. (14) The liquid crystal device according to claim 13, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (15) The liquid crystal device according to claim 13, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed. (16)a, a matrix electrode having a scanning electrode and an information electrode, in which a plurality of electrodes forming at least one of the scanning electrode and the information electrode are wired with at least two different electrode widths; and (b) scan selection in which the scan electrodes have one polarity voltage at the front and the other polarity at the rear, with reference to the voltage applied to the unselected scan electrodes within one vertical scanning period. A signal is applied in an interlaced manner every two or more lines, one screen is scanned in one vertical scan multiple times, and the one polarity voltage of the later scan selection signal among the two consecutive previous and subsequent scan selection signals. a first means for starting application to the scan electrodes before the end of application of the information signal associated with the previous scan selection signal and after the application of the other polarity voltage of the previous scan selection signal; A voltage signal is applied to a predetermined number of information electrodes to provide a voltage that causes one orientation state of the ferroelectric liquid crystal by combining the scan selection signal with the one polarity voltage, and the scan selection signal is applied to the selected signal electrodes. A liquid crystal device comprising a driving means having a second means for applying a voltage signal that provides a voltage that causes the other orientation state of the ferroelectric liquid crystal by combining the signal with the other polarity voltage. (17) The liquid crystal device according to claim 16, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (18) The liquid crystal device according to claim 16, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed. (19) The liquid crystal device according to claim 16, wherein the first means includes means for applying a scan selection signal to the scan electrodes in an interlaced manner every fourth or more times within one vertical scanning period. (20) The liquid crystal device according to claim 1, wherein the first means includes means for applying a scan selection signal to the scan electrodes in an interlaced manner every 5 to 20 lines within one vertical scanning period. (21) The first means sends N scan selection signals to the scan electrodes (N=2, 3, 4, . . . within one vertical scanning period).
17. The liquid crystal device according to claim 16, further comprising means for applying an interlaced voltage at intervals of (an integer number) and performing one screen scan in one vertical scan (N+1) times. (22) a, a matrix electrode having a scanning electrode and an information electrode, in which a plurality of electrodes forming at least one of the scanning electrode and the information electrode are wired with at least two different electrode widths; and (b) scan selection in which the scan electrodes have one polarity voltage at the front and the other polarity at the rear, with reference to the voltage applied to the unselected scan electrodes within one vertical scanning period. A signal is applied in an interlaced manner every two or more lines, one screen is scanned in one vertical scan a plurality of times, a scan selection signal is applied to non-adjacent scan electrodes in at least two consecutive one vertical scans, and two of two consecutive previous and subsequent scan selection signals, the one polarity voltage of the later scan selection signal is before the end of application of the information signal related to the previous scan selection signal, and the voltage of the other polarity of the previous scan selection signal is After applying the voltage, a first means for starting the application to the scanning electrodes and all or a predetermined number of information electrodes is applied to one of the ferroelectric liquid crystals by combining the scanning selection signal with the one polarity voltage. Applying a voltage signal that provides a voltage that causes an alignment state, and applying a voltage to a selected signal electrode that causes a voltage that causes the other alignment state of the ferroelectric liquid crystal by combining with the other polarity voltage of the scanning selection signal. A liquid crystal device having a driving means having a second means for applying a signal. (23) The liquid crystal device according to claim 22, further comprising means for applying one polarity voltage of the subsequent scan selection signal simultaneously with the other polarity voltage of the previous scan selection signal. (24) The liquid crystal device according to claim 2, further comprising means for applying one polarity voltage of the subsequent scan selection signal immediately after application of the other polarity voltage of the previous scan selection signal is completed.