JPH02116823A - Liquid crystal device - Google Patents

Abstract

PURPOSE:To suppress the generation of the flickers occurring in scanning driving of a low-frequency by providing the 1st means which impresses the voltage to generate the one orientation state of a ferroelectric liquid crystal and the 2nd means for executing one screen scanning with plural times of one perpendicular scanning to the crossed parts of information electrodes and scanning electrodes. CONSTITUTION:The information electrode groups 11A, 11B and scanning electrode groups C12 are so constituted as to constitute the matrix with each other and are respectively formed on glass substrates 13 and 14. The liquid crystal device is constituted by inserting an FLC material 15 between these substrates. The erasing voltage is impressed from the scanning electrodes prior to the impression of scanning selection signals and in succession, the scanning selection signals are jump-impressed to the scanning electrodes at every five other pieces so that the scanning selection signals are impressed to the scanning electrodes which are not adjacent to each other in the continuous six fields. The scanning selection period is set long at the time of low temp. in this way and the generation of the flickers occurring in the scanning driving of the low-frame frequency is eventually suppressed.

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 devices display images or information by configuring a scanning electrode group and a signal electrode group in a matrix and filling a liquid crystal compound between the electrodes to form a large number of pixels. The driving method for this display element is time-sharing, in which address signals are selectively and periodically applied to the scanning electrode group, and predetermined information signals are selectively applied in parallel to the signal electrode group in synchronization with the address signal. drive is used.

Most of these were put to practical use, for example, in “Applied Physics Letters” (“Applied Phys Letters”).
sics Letters”) 1971, 18 (
4) M, Shut (M, published in issue 127-128)
S c h a d and W, Helfrich (W, H
e1frich) Co-author of “Voltage Dependant Optical Activity of Applied Nematic Liquid Crystal”
Voltage Dependent Optical
Activity of a Twist
d NematicLiquid Crystal
”) shown in TN (TwistedNematic
) type liquid crystal.

In recent years, the use of bistable liquid crystal elements as an improved type of conventional liquid crystal elements has been proposed by both Clark and Lager Wall in Japanese Patent Laid-Open No. 107216/1983. , US Pat. No. 4,367,924, etc. As a bistable liquid crystal, chiral smectic C phase (Sm
C') or I] phase (SmH') is used, and in these states, in response to an applied electric field, it changes into a first optically stable state and a second optically stable state. It has the property of taking one of the above conditions and maintaining that state when no electric field is applied, that is, it has bistability.It also has a quick response to changes in the electric field, and is widely used in the field of high-speed and memory-type display devices. It is expected to be used.

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 is applied with the phase of the scanning selection signal reversed for each writing frame, and as shown in FIG. A multiplex leg driving method has been disclosed in which selective writing is performed in the following frame (arrangement), and in the subsequent frame, selective writing is performed in black (arranged so that crossed nicols are in a dark state). In addition to the driving method described above, US Pat. No. 4,548,476 and US Pat.
A driving method disclosed in Japanese Patent No. 655561 and the like is 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 a ferroelectric liquid crystal at low temperatures, it is necessary to make the drive pulse (scan selection period) longer than, for example, when driving at a high temperature with a 15) Tz frame frequency scan drive.
For this reason, it was necessary to perform 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 scanning electrode and an information electrode and a ferroelectric liquid crystal; and b) prior to application of a scanning selection signal, a first means for applying a voltage that causes one alignment state of the ferroelectric liquid crystal to the intersection with the electrode; A second means of interlacingly applying a scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrodes every second or more, and performing one vertical scan in one vertical scan a plurality of times;
and second means for applying a voltage signal to the selected information electrode to provide a voltage that causes the other orientation state of the ferroelectric liquid crystal to be generated by combination with the scanning selection signal. Second, 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. A plurality of scanning electrodes each having a predetermined number of scanning electrodes. dividing the ferroelectric liquid crystal into blocks, and for each block, before applying a scan selection signal, applying a voltage to the intersection of the scan electrode and the information electrode in the block to cause one orientation state of the ferroelectric liquid crystal; For each block, a scan selection signal having a voltage of opposite polarity to the voltage signal applied to the scan electrode to generate the voltage is serially adjacent to the voltage applied to the scan electrode that is not selected. A block screen scan is performed by applying voltages to the misaligned scan electrodes to provide the selected information electrode with a voltage that, in combination with the scan selection signal, produces the other orientation state of the ferroelectric liquid crystal. A liquid crystal device having a driving means for applying a voltage signal has a second feature, and thirdly, a liquid crystal element having a matrix electrode formed of a scanning electrode and an information electrode and a ferroelectric liquid crystal, and b. , a first means for applying a voltage that causes one orientation state of the ferroelectric liquid crystal to the intersection of the information electrode and the plurality of scan electrodes, prior to application of the scan selection signal; With reference to the voltage applied to the scan electrode that is not applied to the scan electrode, a scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrode by the first means is applied in an interlaced manner every two or more lines, a second means for performing one vertical scan in one vertical scan and applying a scan selection signal to non-adjacent scan electrodes in at least two consecutive one vertical scans; A third feature of the liquid crystal device includes 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 to be produced by synthesis with the ferroelectric liquid crystal, and fourthly, a. a liquid crystal element having a matrix electrode formed by a scanning electrode and an information electrode, and a ferroelectric liquid crystal; A first means for applying a voltage that causes one alignment state of the liquid crystal, which is opposite to the applied voltage applied to the scan electrode by the first means, based on the applied voltage to the unselected scan electrode. A second means for performing one vertical scan by serially applying a scan selection signal having a voltage of polarity to non-adjacent scan electrodes; A fourth 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 causes the other alignment state.

[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 of FIG. 1).
-A' cross-sectional view), upper electrode groups 11A and IIB (hereinafter referred to as information electrode group) and lower electrode group 12 (hereinafter referred to as scanning electrode group C) are configured to form a matrix with each other, and each is connected to a glass substrate 13. and 14, and the FLC material 15 is sandwiched between them. In addition, as shown in the figure (, the scanning electrode group C is Co, C, C2...
, the information electrode group consists of A (A,, A2゜A3...) and B (B,, B2.B3.B4...), and one pixel consists of the area E (electrode) surrounded by the dotted line in the figure. Line width A>B)
That is, for example, it is constituted by a region E where the scanning electrode C2 and the information electrodes A2 and 82 overlap. At this time, the electrode line width is A>B. Each scanning electrode group C and information electrode group A
-B are each connected to a power supply unit (not shown) via a SW, and the SW is also connected to a controller circuit (not shown) that controls the 0N10FF. With this configuration, under control from the controller circuit,
For example, gray scale expression at pixel E is implemented as follows. When the common electrode C2 is being scanned, white (hereinafter W)
) is when A2 + 82 is given a signal that becomes W, gray 1 (hereinafter referred to as Grayl) is given to A2 when a signal that becomes black (hereinafter referred to as B) is given to W1B2, gray 2 (hereinafter referred to as Gr
ay2) when A2 is given a B signal and B2 is given a W signal, 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 in the binary expression F T, , C.

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 for the minimum intersection area of 1:
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 gray scale levels are possible, and when Cf-D, 16 gray scale 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-, [A-magenta; B=
By arranging the complementary colors of Nibreen or (A=cyan; B-red), four-color display of white, black, A color, and B color is 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 a scanning selection signal S5 and a scanning non-selection signal S.
, J, represent the white information signal Iw and the black information signal I8. FIG. 4(B) shows the voltage (
The voltage waveform applied to the non-selected pixels on the same scan selection electrode (the voltage (IB SS) is applied at the pixel to which the black information signal ■8 is applied) Waveforms and voltage waveforms applied to two types of pixels on the scan non-selection electrode to which the scan non-selection signal is applied are shown.

In this example, prior to applying the above-mentioned scan selection signal Ss,
An erase voltage signal (V H) is applied to perform a black erasing step by previously aligning the ferroelectric liquid crystal to one alignment state to produce a dark state. Although the black erasing step at this time may be replaced by a white erasing step in a bright state, the black erasing step is used in this example because it causes less flicker.

According to FIGS. 4(A) and (B), at phase t1, the selected pixel on the scanning selection electrode receives a voltage -(v + +V 2 ) which is a voltage exceeding the other threshold voltage of the ferroelectric liquid crystal. A bright state is created by applying an electric current to the other orientation state of the ferroelectric liquid crystal, resulting in white writing. Phase 1 at this time. In this case, a voltage (-V, 10 V2), which is a voltage below the threshold of the ferroelectric liquid crystal, is applied to the non-selected pixels on the scan selection electrode, so that no change occurs in the alignment state of the ferroelectric liquid crystal.

On the other hand, a voltage ±V2, which is a voltage below the threshold voltage of the ferroelectric liquid crystal, is applied to the pixels on the scanning non-selected electrodes at phase t1. Therefore, in this example, the scan selected at phase t1? [Even if the i-most pixel is written in white or black and then the scanning non-selection signal is applied, the writing state at the previous writing will be maintained as it is.

Further, in this example, at phase t2, a voltage of opposite polarity to the information signal at write phase t1 is applied from the information electrode. Therefore, as shown in FIGS. 4(C) to 4(E), an alternating current 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 a timing chart of voltage waveforms for producing the display state shown in FIG. 5 using the drive waveforms shown in FIGS. 4(A) and (B). In this example, the erase voltage VH is applied from the scan electrode in the erase step prior to the application of the scan selection signal Ss, and then the scan selection signal is applied intermittently to the scan electrode every five lines, and the scan selection signal is applied to the scan electrodes every five consecutive fields. Then, a scan selection signal is applied to non-adjacent scan electrodes. In this example, by selecting every five scanning electrodes and performing frame scanning (one vertical scan) in six field scans, the scanning selection period (
1, +12) is set for a long time, and as a result, even with low frame frequency scan drive (e.g. 5 to 10 Hz frame frequency), the occurrence of flicker caused by low frame frequency scan drive is significantly suppressed. Furthermore, by applying a scan selection signal to select non-adjacent scan electrodes in six consecutive field scans, image deletion could be effectively eliminated.

FIG. 4(D) is an example using the driving waveforms of FIG. 4(A) and (B). In this example, every two scanning electrodes are selected in an interlaced manner, and two consecutive fields are selected. A scan selection signal was applied to select non-adjacent scan electrodes during scanning.

FIG. 4(E) is another example using the drive waveforms of FIGS. 4(A) and 4(B) (however, only the scanning signal is shown). According to the driving example shown in FIG. 4(E), one block is designated for every five scanning electrodes, and for each block, an erasing step is activated by applying an erasing voltage signal VH, and then a scanning selection signal is applied. are applied to scan electrodes that are not serially adjacent.

FIG. 6 is a partial circuit diagram showing an example of the output stage of the above scan electrode drive circuit. In FIG. 6, 61 is a buffer BN whose output level is controlled by a selection line 62.
When terminal Q2 is selected, buffers B1 to B5 are turned on all at once, transmitting the levels of terminals R1 to R5 as they are, and when terminal Q1 is not selected, output lines S1 to S all deselect cells. reaches a predetermined quantitative level. Terminal Q
1 has the same function for buffers B6 to B IQ.

FIG. 7 is a configuration diagram showing another example of implementing the present invention. In FIG. 7, information signals are transmitted by a common information electrode drive circuit 71, and scanning electrode drive circuits 72 are
Divide into #3, A and B respectively.

Drive the display part of C. This scanning electrode drive circuit #1~
#3 has a separate circuit configuration from each logic circuit part, so that the lines necessary for writing are Q.

- After first selecting in Q3, writing is performed in areas A, B, and C, and large-capacity, high-speed, and high-density writing can be realized.

FIG. 8 shows another driving example used in the present invention. Prior to applying the scan selection signal SS, the erase voltage VH is applied as in the previous example.
is applied, and the entire screen or block screen is erased to black (or white).

According to FIGS. 8A and 8B, white writing is performed at phase t2. Further, the phase t1 is an auxiliary signal applied from the information signal so that an AC voltage is applied to the pixel when scanning is not selected, as in the previous example. Such auxiliary signals are described in U.S. Pat.
It is possible to achieve the same effect as disclosed in JP-A No. 655561 and the like.

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 (however, only the scan selection signal Ss is shown). Figure 6 (C
According to the driving example shown in ), the scan selection signal is applied to the scan electrodes at intervals of every 6 fields, and one frame scan is completed by scanning 7 fields. Also in this example, scan selection signals are applied to non-adjacent scan electrodes in seven consecutive field scans.

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 twenty scan electrodes.

FIG. 8(D) is another example using the drive waveforms of FIGS. 8(A) and (B) (however, only the scanning signal is shown). According to the driving example shown in FIG. 8(D), one block is designated for every five scanning electrodes, and for each block, an erasing step is activated by applying an erasing voltage signal VH, and then a scanning selection signal is applied. are applied to scan electrodes that are not serially adjacent. Also, in this example, one vertical scan is completed by serially performing non-adjacent block screen scans.

In addition, in the present invention, the peak values of the voltage signals V, -V2 and ±v3 are expressed as lv+l21V2l>l±V3l, preferably lV+l = l-V2+>, l±V
It is recommended to set it to 31. Further, the pulse width of these voltage signals is generally 1 μsec-1 msec, preferably 1
It is preferable to set the pulse width to 0 μsec to 100 μsec, and set the pulse width at low temperatures to be longer than the pulse width at high temperatures.

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. Can be used.

FIG. 9 is a configuration diagram showing an example of a display device of the present invention. 9
01 is a display panel, which has scanning electrodes 902 and information electrodes 903.
and a ferroelectric liquid crystal filled between them, and at the intersection of a matrix consisting of a scanning electrode 902 and an information electrode 903, the orientation of the ferroelectric liquid crystal is caused by an electric field caused by a voltage applied to the electrodes. controlled.

Reference numeral 904 denotes an information electrode drive circuit, which includes a video data shift register 9041 that stores serial video data from the video information signal line 906;
A line memory 9 that stores parallel video data from
042, an information electrode driver 9043 for applying a voltage to the information electrode 903 according to the video data stored in the line memory 9042, and a voltage V to be applied to the information electrode 903; , 0 and -vD by a signal from a switching control line 911.

Reference numeral 905 is a scan electrode drive circuit that receives scan address data 1'.
A decoder 9051° for receiving a signal from the decoder 9051 and instructing one scan electrode of all the scan electrodes; a scan electrode driver 9052 for receiving a signal from the decoder 9051 and applying a voltage to the scan electrode 902; A scan-side power switch 9053 is provided that switches the voltage "S+O+-vS" applied to the scan electrode 902 by a signal from a switch control line 911.

908 is a CPU which receives clock pulses from an oscillator 909 and controls an image memory 910 and a video information signal line 906.
．． Scanning address data line 907. The switching control line 911 controls signal transfer.

〔Effect of the invention〕

According to the present invention, it is possible to effectively suppress the occurrence of flicker caused by scanning drive at a low frame frequency such as 2 Hz = 15 Hz. , it is possible to obtain a high-quality display screen over a substantially wide temperature range without the occurrence of flicker.Furthermore, according to the present invention, image distortion can be effectively prevented; You can get a high-quality display screen.

[Brief explanation of drawings]

FIG. 1 is a plan view of a matrix electrode used in the present invention. Figure 2 shows A of the ferroelectric liquid crystal element used in the present invention.
-A' is a sectional view. FIG. 3 is an explanatory diagram schematically showing halftones. FIGS. 4A to 4E are waveform diagrams showing examples of drive waveforms used in the present invention. FIG. 5 is an explanatory diagram schematically showing the display state of the matrix electrode. FIG. 6 is a block diagram of the output means of the scanning electrode drive circuit used in the present invention. FIG. 7 is a block diagram showing one embodiment of the present invention. FIGS. 8A to 8D are waveform diagrams showing other examples of drive waveforms used in the present invention. FIG. 9 is a block diagram of the present invention. Qi Ding f Ding 2 i4 1g Sofa Z Ken 11L h '7'2! -L4 tatami horse's turning e (￥1) (A) Kei Asumi Tanyu brother S2 To →---- C I shi2 Do →---- ぢ1 ぢ2

Claims (17)

[Claims] (1) 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. A liquid crystal element having a ferroelectric liquid crystal formed by a scanning electrode and an information electrode, and b. , a first means for applying a voltage that causes one orientation state of the ferroelectric liquid crystal, to the scanning electrode,
Based on the voltage applied to the unselected scan electrode,
A second method in which a scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrode in the first means is applied in an interlaced manner every two or more lines, and one screen is scanned by one vertical scan a plurality of times. and a second means for applying a voltage signal to the selected information electrode to provide a voltage that causes the other orientation state of the ferroelectric liquid crystal to be generated by combining with the scanning selection signal. . (2) The liquid crystal device according to claim 1, wherein the second means includes means for applying the scan selection signal to the scan electrodes in an interlaced manner every fourth or more times within one vertical scanning period. (3) The liquid crystal device according to claim 1, wherein the second 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. (4) The second means sends N scanning selection signals to the scanning electrodes within one vertical scanning period (N=an integer of 2, 3, 4, ...).
2. The liquid crystal device according to claim 1, further comprising means for performing interlaced application at intervals and scanning one screen in one vertical scan (N+1) times. (5) The scan selection signal is a signal having a voltage having the opposite polarity and the same polarity as the applied voltage applied to the scan electrode by the first means, based on the voltage applied to the unselected scan electrode. The liquid crystal device according to claim (1). (6) The liquid crystal device according to claim (1), wherein the first means is means for applying a voltage to the intersection of the information electrode and the full scanning electrode to cause one orientation state of the ferroelectric liquid crystal. . (7) The liquid crystal according to claim (1), wherein the first means is means for applying a voltage to the intersection of the information electrode and the predetermined number of scanning electrodes to produce one orientation state of the ferroelectric liquid crystal. Device. (8) 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. The scanning electrode is divided and specified into a plurality of blocks each formed by a predetermined number of scanning electrodes. In each block, prior to applying a scan selection signal, a voltage that causes one orientation state of the ferroelectric liquid crystal is applied to the intersection of the scan electrode and the information electrode in the block, and the selected state is determined for each block. Serially applying a scan selection signal having a voltage of opposite polarity to the voltage signal applied to the scan electrodes to generate the voltage, with reference to the voltage applied to the scan electrodes that are not adjacent to each other. A liquid crystal device having driving means for scanning one block of screen by scanning and applying a voltage signal to a selected information electrode to provide a voltage that causes the other orientation state of the ferroelectric liquid crystal to be generated by combining with a scanning selection signal. . (9) The scan selection signal has a polarity opposite to and the same polarity as the applied voltage applied to the scan electrode prior to application of the scan selection signal, with reference to the voltage applied to the unselected scan electrode. 9. The liquid crystal device according to claim 8, wherein the signal has a voltage. (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. A liquid crystal element having a ferroelectric liquid crystal formed by a scanning electrode and an information electrode, and b. , a first means for applying a voltage that causes one orientation state of the ferroelectric liquid crystal; an applied voltage applied to the scan electrode by the first means with reference to the applied voltage to the unselected scan electrode; A second means for performing one vertical scan by serially applying a scan selection signal having a voltage of opposite polarity to the scan electrodes that are not adjacent to each other; 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 ferroelectric liquid crystal. (11) The scan selection signal is a signal having a voltage having the opposite polarity and the same polarity as the applied voltage applied to the scan electrode by the first means, with reference to the voltage applied to the unselected scan electrode. The liquid crystal device according to claim 10. (12) 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. A liquid crystal element having a ferroelectric liquid crystal formed by a scanning electrode and an information electrode, and b. , a first means for applying a voltage that causes one orientation state of the ferroelectric liquid crystal, to the scanning electrode,
Based on the voltage applied to the unselected scan electrode,
A scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrode in the first means is applied in an interlaced manner every two or more lines, and one screen is scanned by one vertical scan a plurality of times,
second means for applying a scan selection signal to non-adjacent scan electrodes in at least two consecutive one vertical scans, and applying the scan selection signal to the selected information electrode in combination with the scan selection signal to direct the other orientation of the ferroelectric liquid crystal; A liquid crystal device having driving means for applying a voltage signal that provides a voltage that causes a state. (13) A signal in which the scan selection signal has a voltage having the opposite polarity and the same polarity as the applied voltage applied to the scan electrode by the first means, with reference to the voltage applied to the unselected scan electrode. The liquid crystal device according to claim (12). (14)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; (b) prior to application of a scan selection signal, a voltage is applied to the intersection of the information electrode and the plurality of scan electrodes to cause one orientation state of the ferroelectric liquid crystal; In the first means, scanning electrodes,
Based on the voltage applied to the unselected scan electrode,
A second method in which a scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrode in the first means is applied in an interlaced manner every two or more lines, and one screen is scanned by one vertical scan a plurality of times. and a second means for applying a voltage signal to the selected information electrode to provide a voltage that causes the other orientation state of the ferroelectric liquid crystal to be generated by combining with the scanning selection signal. . (15) The scan selection signal is a signal having a voltage having the opposite polarity and the same polarity as the applied voltage applied to the scan electrode by the first means, with reference to the voltage applied to the unselected scan electrode. The liquid crystal device according to claim (14). (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; (b) prior to application of a scan selection signal, a voltage is applied to the intersection of the information electrode and the plurality of scan electrodes to cause one orientation state of the ferroelectric liquid crystal; In the first means, scanning electrodes,
Based on the voltage applied to the unselected scan electrode,
A scan selection signal having a voltage of opposite polarity to the applied voltage applied to the scan electrode in the first means is applied in an interlaced manner every two or more lines, and one screen is scanned by one vertical scan a plurality of times,
second means for applying a scan selection signal to non-adjacent scan electrodes in at least two consecutive one vertical scans, and applying the scan selection signal to the selected information electrode in combination with the scan selection signal to direct the other orientation of the ferroelectric liquid crystal; A liquid crystal device having driving means having second means for applying a voltage signal for providing a voltage that produces a state. (17) The scan selection signal is a signal having a voltage of opposite polarity and the same polarity as the applied voltage applied to the scan electrode in the first means, with reference to the voltage applied to the unselected scan electrode. A liquid crystal device according to claim (16).