JP3082149B2 - Display device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for performing gradation display using a bistable display element.

[0002]

2. Description of the Related Art Hitherto, a device using ferroelectric liquid crystal (FLC) has been known as a bistable display device.

A display element using a ferroelectric liquid crystal is disclosed in Japanese Patent Application Laid-Open No. 61-94023, etc., in which a transparent electrode is formed on two inner surfaces while maintaining a cell gap of about 1 to 3 microns, and alignment treatment is performed. 1 shows a liquid crystal cell in which ferroelectric liquid crystals are injected into a liquid crystal cell configured by facing glass substrates subjected to the above method.

The characteristics of the above-mentioned display device using a ferroelectric liquid crystal are that the ferroelectric liquid crystal has a spontaneous polarization, so that the coupling force between an external electric field and the spontaneous polarization can be used for switching and the length of the ferroelectric liquid crystal molecule. Since the axial direction has a one-to-one correspondence with the polarization direction of spontaneous polarization, switching can be performed depending on the polarity of an external electric field.

The ferroelectric liquid crystal generally uses a chiral smectic liquid crystal (SmC *, SmH *), and thus exhibits a twisted orientation of the liquid crystal molecule long axis in a bulk state. (P213-P234 NA CLA) can be eliminated by placing the cell in a cell having
RK et al, MCLC; 1983, Vol9
4. ).

The actual structure of a ferroelectric liquid crystal cell uses a simple matrix substrate as shown in FIG.

The ferroelectric liquid crystal is mainly used as a binary (white / black) display element with two stable states in a light transmitting and blocking state, but it is also capable of multi-value display, that is, halftone display. One of the halftone display methods is to create an intermediate light transmission state by controlling the area ratio of a bistable state in a pixel. Hereinafter, this method (area modulation method) will be described in detail.

FIG. 7 is a diagram schematically showing the relationship between the switching pulse amplitude and the transmittance of a ferroelectric liquid crystal element. One cell having one polarity is initially applied to a cell (element) which is initially in a completely light-blocking (black) state. 5 is a graph in which the amount of transmitted light I after application of a pulse is plotted as a coefficient of the amplitude V of a single pulse. When the pulse amplitude is equal to or less than the threshold value V _th (V <V _th ), the transmitted light amount does not change, and the transmission state after the pulse application shows the state before the application as shown in FIG. And does not change. When the pulse amplitude exceeds the threshold value (V _th <V <V _sat ), a part of the pixel transits to the other stable state, that is, the light transmission state shown in FIG. When the pulse amplitude further increases and becomes equal to or higher than the saturation value V _sat (V _sat <V), as shown in FIG. 9D, all the pixels are in a light transmitting state, and the light amount reaches a constant value.

That is, in the area modulation method, the halftone is displayed by controlling the voltage so that the pulse amplitude V satisfies _Vth <V < _Vsat .

Using this area modulation method, a driving method (hereinafter, referred to as a prior application example) described in Japanese Patent Application No. 3-73127 filed by the present applicant has been proposed. Stable analog gradation display was possible even in a display device in which variations in threshold characteristics due to temperature unevenness, cell thickness unevenness, and the like were present.

[0011]

However, in the above conventional example, four write pulses and one auxiliary pulse for each pulse are required for one pixel in order to compensate for variations in threshold characteristics in the display unit. There is a disadvantage that the writing time is about 10 times longer than the writing time of the binary display.

The present invention has been made in view of the above-described problems in the conventional example, and compensates for a change in threshold value caused by temperature unevenness or cell thickness unevenness in a display unit, and displays gray scales quickly. It is an object of the present invention to provide a display device that can be obtained.

[0013]

In order to achieve the above-mentioned object, according to the present invention, there is provided a pair of electrodes and a space between the pair of electrodes.
And a ferroelectric liquid crystal having improved bistability.
The area ratio of the bistable state is controlled according to the write pulse
A sub-pixel that constitute one pixel in two sub-pixels having substantially the same threshold characteristics, each of the first and second sub-pixel by applying a plurality of write pulses, the first subpixel the In the first pulse of the plurality of writing pulses, the sub-pixel
The entire area is brought into the first stable state, and as the second and subsequent pulses applied thereafter, a pulse having a polarity for writing the second state and a pulse having a polarity for writing the first state are alternately applied. The second sub-pixel sets the entire area of the sub-pixel in the second stable state by the first pulse of the plurality of writing pulses, and the first and second pulses applied thereafter are the first and second pulses. Driving means for alternately applying a pulse having a polarity for writing the second state and a pulse having a polarity for writing the second state. Here, the threshold characteristics are, for example, two stable states.
One is in a light transmitting state (100%), and the other is in a blocking state (0%).
%), The transmittance characteristic with respect to the voltage or the pulse width of each sub- pixel in the display unit. For example, in the voltage / transmittance characteristic (threshold characteristic) for each pixel in the display unit, the write pulse is the voltage at which the change in the transmittance starts for each characteristic, and the highest voltage is V _th , Among the voltages at which the rate change ends, the highest voltage is V _sat , the amplitude of the n-th write pulse applied to the first sub-pixel is V _Qn , the n-th write pulse applied to the second sub-pixel the amplitude as _{V Rn, V Q1 ≧ V sat} V R1 ≧ V sat V sat ≧ V Q2 ≧ V th V Q2 = + V R2 = V th + V sat V Q2 + V Q3 2 × V th V R2 + V R3 = 2 × in _{V th n> 3 V Qn -2} -V Q n = V Rn -2 -V R n = 2 × (V sat -V th) ( where, V _Qn, V _Rn with those as a negative number zero to) _{or, V Q1 ≧ V sat V R1} ≧ V sat V sat ≧ V Q2 ≧ V th log V Q2 + log V R2 = log V th + log V sat log V Q2 + log _{V Q3 = 2 × log V th} log V R2 + log V R3 = 2 × log V th in _{n> 3 logV Qn -2 -log V} Q n = log V Rn -2 -log V R n = 2 × (l
og V _sat −log V _th ) (provided that V _Qn and V _Rn both have negative numbers are set to zero). Alternatively, in the pulse width / transmittance characteristic (threshold characteristic) for each pixel in the display unit,
The pulse width at which the change of the transmittance starts for each characteristic is applied to the first sub-pixel, the longest pulse width being t _th , and the pulse width at which the change of the transmittance is finished being t _sat , Let the pulse width of the n-th write pulse be T
_Qn, a pulse width of the n-th writing pulse applied to the second subpixel as _{T Rn, T Q1 ≧ t sat} T R1 ≧ t sat t sat ≧ T Q2 ≧ t th T Q2 + T R2 = t th _{+ t sat T Q2 + T Q3} = 2 × t th T R2 + T R3 = 2 × t th n> 3 in _{T Qn -2 - T Q n =} T Rn -2 - T R n = 2 × (t sat - t _th ) (provided that T _Qn and T _Rn both have negative numbers are zero) or T _Q1 ≧ t _sat T _R1 ≧ t _sat t _sat ≧ T _Q2 ≧ t _th log T _Q2 + log T _R2 = _{log t th + log t sat log} T Q2 + log T Q3 = 2 × log t th log T R2 + log T R3 = 2 × log t th n> 3 in _{log T Qn -2 -log T Q n} = log T Rn -2 −log T _{R n} = 2 ×
(Log t _sat -log t _th ) (provided that T _Qn and T _Rn both have negative numbers are zero).

[0014]

According to the present invention, with the above-described configuration, it is possible to compensate for variations in the threshold characteristics and to realize quick gradation display. A compensation method for a threshold change according to the present invention will be described with reference to FIG.

In the display section, a pixel P _A composed of _two sub-pixels A ₁ and A ₂ , a pixel P _B composed of _two sub-pixels B ₁ and B ₂ , and a pixel P _B composed of two sub-pixels C ₁ and C ₂ . Constituent pixel P
_C , a pixel P _D composed of _two sub-pixels D ₁ and D ₂ , and a pixel P _E composed of _two sub-pixels E ₁ and E ₂ (FIG. 1 (iii)), and FIG. ), The sub-pixel A
₁ and A ₂ have the highest threshold values in the display unit, and the threshold values are lower in the order of B to E in the following.

[0016] In FIG. ₁ (i), a 1 is the threshold characteristics for white write pulses of the pixel P _A, a ₂ is the threshold characteristics with respect to black writing pulse for the pixel P _A, b ₁ is the threshold for white write pulses of the pixel P _B properties, b ₂ is the threshold characteristics with respect to black writing pulse for the pixel P _B, c ₁ is the threshold characteristics for white write pulses of the pixel P _C, c ₂ is the threshold characteristics with respect to black writing pulse for the pixel P _C, d ₁ is the pixel P _D threshold characteristic for the white write pulses, d ₂ is the threshold characteristics with respect to black writing pulse for the pixel P _D, e ₁ is the threshold characteristics for white write pulses of the pixel P _E, e ₂ is the threshold characteristics with respect to black writing pulse for the pixel P _E is there. Also, V _th is the threshold characteristics a _1, the threshold voltage of a _2, V _sat is a threshold characteristic a _1, the saturation voltage of a _2, V
_th ′ is the threshold voltage of the threshold characteristics e ₁ and e ₂ , and V _sat ′ is the saturation voltage of the threshold characteristics e ₁ and e ₂ . The transmittance was 0% when the subpixel was completely black, and 100% when the subpixel was completely white.

Here, the waveform Q of FIG. 1 (ii) is applied to the sub-pixels A _{1 to} E ₁ , and the waveform R is applied to the sub-pixels A _{2 to} E ₂ .

The waveform Q is composed of pulses Q ₁ , Q ₂ and Q ₃ . Pulse Q ₁ is the transmittance in all the pixels 0
% Of the black writing pulse and pulse Q ₂
White write pulses as transmittance is alpha% in _1, pulse Q ₃ are the saturation voltage V _sat 'is the threshold voltage V _th of the sub-pixel A ₁
It is a black writing pulse as transmittance is alpha% in the sub-pixel E ₁ equals.

The waveform R is composed of pulses R ₁ , R ₂ and R ₃ . Pulses R _1, all of the pixels in the transmittance is 100% such white write pulses, the pulse R ₂ is a black write pulses as transmittance is alpha% in the sub-pixel A _2,
The pulse R ₃ has a transmittance α% in the sub-pixel E ₂ whose saturation voltage V _sat ′ is equal to the threshold voltage V _th of the sub-pixel A _2.
This is a white writing pulse such that

If the transmittance of the sub-pixel B ₁ becomes α + β% by the pulse Q ₂ , the sub-pixel B ₂ by the pulse R ₂
Is α-β%. Next, we will prove this.

In △ xyz and △ x'y'z 'of FIG. 1 (i), ∠yz = ∠y'x'z' = ∠R, ∠xzy =
Since ∠x′z′y ′ and xz = x′z ′, △ xyz≡ △ x′y′z ′ due to a diagonal narrow-edge phase or the like. Therefore, xy = x′y ′ = β.

Similarly, if the transmittance of the sub-pixel D ₁ becomes α + δ% by the pulse Q ₃ , the transmittance of the sub-pixel D ₂ becomes α-δ% by the pulse R ₃ . This is a triangle ST
It is proved that U and the triangle S'T'U 'are congruent.

[0023] If the pulse R ₂ by the sub-pixel C ₁ transmittance is α-γ (> 0)% , further α + γ-100% fraction transmission by the pulse R ₃ is increased as evidenced from FIG. 2 .

[0024] That is, the auxiliary 2, the straight line L parallel to the street straight c ₁ point c, the straight line L parallel to the street straight c ₁ point e ', and the perpendicular line drawn from the point g on the voltage axis Add as a line. As is clear from the figure, {abc}
adc and $ def @ ghi. △ abc≡ △ ad
Since c = ab = ad = γ and ak = α from c, dk = α + γ. Also, since ek = 100, de = dk−ek = α + γ−100.
De = gh from Δdefｈghi. Therefore gh =
α + γ−100.

As described above, in the present compensation method, the threshold characteristics of each pixel can be approximated by a straight line. Even if the threshold value changes or there is a variation in the display unit, the slope of the threshold characteristics of each pixel does not change and the coordinates are parallel. The threshold characteristics for the first stable state match the threshold characteristics for the second stable state. The highest threshold voltage V _th and the lowest saturation voltage V _sat ′ of each pixel in the display unit are V _th. It is valid if the four conditions that ≤ V _sat 'are satisfied.

It has been confirmed in the aforementioned Japanese Patent Application No. 3-73127 that the ferroelectric liquid crystal element satisfies the following conditions. Note that the condition is that the number of pulses for writing one sub-pixel is three.
_th ≦ 2V _sat ′, and in the case of 7 pulses, V _th ≦ 4V _sat ′. In other words, the transmittance can be compensated even if the threshold voltage or the saturation voltage changes twice or varies in the case of three pulses in FIG. 1, but three times or seven in the case of five pulses.
In the case of a pulse, a threshold change of five times can be compensated.

[0027] If the threshold characteristics in terms of a completely linear _{log V Q2 + log V R2 =} log V th + log V sat log V Q2 + log V Q3 = log V R2 + log V R3 = 2 × log V
It becomes _th .

In FIG. 1, the gray scale is displayed by changing the voltage, but the same effect can be obtained by adjusting the pulse width. In the case of digital gradation display, the threshold characteristic does not need to be a straight line, but may be a step-like one as shown in FIG.

[0029]

FIG. 3 shows a liquid crystal display according to an embodiment of the present invention. This liquid crystal display device has a liquid crystal display section 101 having a matrix electrode composed of a scanning electrode 201 and an information electrode 202 shown in detail in FIG.
02, an information signal application circuit 103 applied to the liquid crystal via
A scanning signal applying circuit 102 for applying a scanning signal to liquid crystal via a scanning electrode 201; a scanning signal control circuit 104; an information signal control circuit 106; a drive control circuit 105;
And a temperature detection circuit 109 for detecting the temperature of the display unit 101 based on the output of the thermistor 108. A ferroelectric liquid crystal is disposed between the scanning electrode 201 and the information electrode 202. Reference numeral 107 denotes a graphic controller. Data transmitted from the graphic controller 107 is input to a scanning signal control circuit 104 and an information signal control circuit 106 through a drive control circuit 105, and is converted into address data and display data, respectively. In addition, the temperature of the liquid crystal display unit 101 is input to the temperature detection circuit 109 via the thermistor 108, and is input to the scanning signal control circuit 104 via the drive control circuit 105 as temperature data. Then, the scanning signal applying circuit 102 generates a scanning signal according to the address data and the temperature data, and applies the scanning signal to the scanning electrode 201 of the liquid crystal display unit 101. Further, the information signal application circuit 103 generates an information signal according to the display data, and applies the information signal to the information electrode 202 of the liquid crystal display unit 101.

In FIG. 4, reference numerals 203 and 204 denote sub-pixels formed by intersections between the scanning electrodes 201 and the information electrodes 202. Reference numeral 205 denotes a pixel which includes two sub-pixels 203 and 204 and is a display unit.

FIG. 5 is a partial sectional view of the liquid crystal display unit 101. In the figure, 301 is an analyzer, 306 is a polarizer, and these are arranged in crossed Nicols. 302 and 305 are glass substrates, 303 is a ferroelectric liquid crystal, 304 is a UV curing resin, and 307 is a spacer.

FIG. 6 shows the waveform of the drive signal in the device of FIG. In the figure, a is a selection signal waveform output from the scanning signal applying circuit 102 and applied to the first sub-pixel, and b is a signal corresponding to grayscale data output from the information signal applying circuit 103 and applied to the first sub-pixel. Is an information signal waveform having the same amplitude, and c is a composite waveform of a and b. d is a selection signal waveform output from the scanning signal application circuit 102 and applied to the second sub-pixel, and e has an amplitude corresponding to the grayscale data output from the information signal application circuit 103 and applied to the second sub-pixel. An information signal waveform, f is a composite waveform of d and e. t _{1 to} t ₃ , Q _{1 to} Q ₃ and R _{1 to} R are the same as those in FIG. 1 (ii).

As can be seen from the figure, the time 1H required for displaying one pixel may be four times the width of the second or subsequent write pulse Δt, ie, 4Δt.

In this embodiment, the gray scale is displayed by a pulse having a fixed pulse width and a variable amplitude, but the same result can be obtained with a pulse having a variable pulse width and a fixed amplitude.

In this embodiment, an example is given in which a cell thickness gradient is provided in order to make the threshold characteristic in a pixel gentle. However, a capacitance gradient or a potential gradient may be applied to an electrode. Other methods may be used.

[0036]

As described above, according to the present invention,
Bistability filled between a pair of electrodes and the pair of electrodes
And a writing pulse is applied.
A sub-pixel whose area ratio in the bistable state is controlled, one sub-pixel having substantially the same threshold characteristics constitutes one pixel, and a plurality of writing pulses are applied to the first and second sub-pixels, respectively. The first sub-pixel sets the entire area of the sub-pixel to a first stable state with the first pulse of the plurality of writing pulses, and then applies the second and subsequent pulses to be applied. Is a pulse of polarity to write a second stable state and the first pulse
A pulse of a polarity for writing a stable state is alternately applied, while the second sub-pixel brings the entire area of the sub-pixel to a second stable state with a first pulse of the plurality of write pulses, and is then applied. that as the second and subsequent pulse the first cheap
By providing a driving unit that alternately applies a pulse of a polarity for writing a constant state and a pulse of a polarity for writing a second stable state, a change in a threshold value caused by temperature unevenness or cell thickness unevenness in the display unit is compensated, In addition, it was possible to realize quick gradation display.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a driving method according to the present invention.

FIG. 2 is a diagram illustrating details of transmittance compensation of FIG. 1 (i).

FIG. 3 is a diagram illustrating a configuration of a display device according to an embodiment of the present invention.

FIG. 4 is an enlarged plan view of a liquid crystal display unit in FIG. 3;

FIG. 5 is a sectional view of the liquid crystal display unit.

FIG. 6 is a signal diagram of a driving waveform in the device of FIG.

FIG. 7 is a schematic diagram showing a relationship between a switching pulse amplitude and a transmittance of a ferroelectric liquid crystal.

FIG. 8 is a schematic diagram showing a light transmitting state of a ferroelectric liquid crystal element according to an applied pulse.

FIG. 9 is another schematic diagram showing a light transmission state of a bistable element according to an applied pulse.

FIG. 10 is an explanatory diagram of a conventional liquid crystal element structure.

[Explanation of symbols]

101: liquid crystal display unit, 102: scanning signal application circuit, 10
3: information signal applying circuit, 104: scanning signal control circuit, 1
05: drive control circuit, 106: information signal control circuit, 10
7: graphic controller, 201: scanning electrode, 2
02: information electrode, 203, 204: sub-pixel, 205: pixel, 301: analyzer, 302, 305: glass substrate, 303: ferroelectric liquid crystal, 304: protective film, 306:
Polarizer, 307: spacer.

Claims (17)

(57) [Claims] An electrode filled between a pair of electrodes and the pair of electrodes.
With a ferroelectric liquid crystal having bistability
Sub-pixels whose area ratio in the bistable state is controlled in accordance with the write pulse, and a large number of pixels composed of first and second sub-pixels having substantially the same threshold characteristics are arranged in a matrix. And a driving unit for applying a plurality of write pulses to the first and second sub-pixels in order of increasing amplitude or pulse width when driving each pixel. A first pulse of the plurality of write pulses is supplied to the pixel as a first pulse.
First safe by the polarity of the pulse applied to the entire area of the sub pixel
After writing the steady state, a pulse of a second polarity and a pulse of a first polarity are alternately applied as second and subsequent write pulses, and a first sub-pixel is provided with a first pulse of the plurality of write pulses. Apply a pulse of the second polarity as a pulse
After writing the second stable state in the entire area of the sub-pixel, the second
The pulse of the first polarity and the pulse of the second
And a drive unit for alternately applying pulses of the polarity. 2. The display device according to claim 1, wherein an area of the first sub-pixel is equal to an area of the second sub-pixel. 3. The display device according to claim 1, wherein the first sub-pixel and the second sub-pixel are located at positions adjacent to each other. Wherein said display device according to claim 1 number of write look pulses applied to each sub-pixel is an odd integer greater than 3. 5. The driving unit according to claim 1, wherein, in a specific pixel in the display unit, a first sub-pixel has an x% (0 ≦ x ≦ 100) region in a second pulse of the plurality of writing pulses. without changing the state in the third pulse writing a second stable state, the second sub-pixel first cheap to a second 100-x% area by a pulse of the plurality of write pulses
The display device according to claim 1, wherein the display is driven such that a constant state is written and the state is not changed by the third pulse. Wherein said particular pixel, display apparatus according to claim 5 most threshold is higher pixel on the display portion. 7. The driving unit according to claim 2, wherein, in a specific pixel in the display section, a first sub-pixel has a second stable state within a region of 100% by a second pulse of the plurality of writing pulses. /> State and 100-x% (0 ≦ x
.Ltoreq.100), the first stable state is written to the second sub-pixel by the second pulse of the plurality of write pulses, and the first stable state is written to the area of 100% by the second pulse. 2. The display device according to claim 1, wherein the second stable state is written in an area of x%. Wherein said particular pixel, display apparatus according to claim 7 most threshold on the display portion is lower pixels. 9. In a voltage / transmittance characteristic for each pixel in the display unit, a voltage at which a change in transmittance starts for each characteristic is a highest voltage V _th , and a voltage at which a change in transmittance ends is a voltage. Among them, the highest voltage is V _sat , the amplitude of the n-th write pulse applied to the first sub-pixel is V _Qn ,
_Assuming that the amplitude of the n-th write pulse applied to the second sub-pixel is V _Rn , V _Q1 ≧ V _sat V _R1 ≧ V _sat V _sat ≧ V _Q2 ≧ V _th V _Q2 + V _R2 = V _th + V _sat V _{Q2 + V Q3 = 2 × V} th V R2 + V R3 = 2 × V th n> 3 in _{V Qn -2 -V Q n = V} Rn -2 -V R n = 2 × (V sat -V th) ( where , V _Qn , and V _Rn are all assumed to be negative). 10. In the voltage / transmittance characteristics of each pixel in the display unit, the highest voltage among the voltages at which the change of the transmittance starts for each characteristic is V _th and the voltage at which the change of the transmittance ends. When the highest voltage among them is V _sat , the amplitude of the n-th write pulse applied to the first sub-pixel is V _Qn , and the amplitude of the n-th write pulse applied to the second sub-pixel is V _Rn , V _Q1 ≧ V _sat V _R1 ≧ V _sat V _sat ≧ V _Q2 ≧ V _th log V _Q2 + log V _R2 = log V _th + log V _sat log V _Q2 + log V _Q3 = 2 × log V _th log V _R2 + log V _R3 = 2 × log V _th n> 3 in _{log V Qn -2 -log V Q n} = log V Rn -2 -log V R n = 2 ×
2. The display device according to claim 1, wherein (log V _sat −log V _th ) (provided that V _Qn and V _Rn both have negative numbers are zero). 11. In the pulse width / transmittance characteristic of each pixel in the display section, the pulse width at which the change of the transmittance for each characteristic starts is the longest pulse width of t _th , and the change of the transmittance is completed. T _sat , the pulse width of the n-th write pulse applied to the first sub-pixel is T _Qn , the pulse of the n-th write pulse applied to the second sub-pixel _Assuming that the width is T _Rn , T _Q1 ≧ t _sat T _R1 ≧ t _sat t _sat ≧ T _Q2 ≧ t _th T _Q2 + T _R2 = t _th + t _sat T _Q2 + T _Q3 = 2 × t _th T _R2 + T _R3 = 2 × t _th n> 3 in _{T Qn -2 - T Q n =} T Rn -2 - T R n = 2 × (t sat -t th) ( where a negative number with T _Qn, T _Rn The display device according to claim 1, wherein the number is zero. 12. In the pulse width / transmittance characteristic for each pixel in the display unit, the pulse width at which the change in transmittance for each characteristic starts is the longest pulse width of t _th , and the change in transmittance ends. T _sat , the pulse width of the n-th write pulse applied to the first sub-pixel is T _Qn , the pulse of the n-th write pulse applied to the second sub-pixel When the width is _{T Rn, T Q1 ≧ t sat} T R1 ≧ t sat t sat ≧ T Q2 ≧ t th log T Q2 + log T R2 = log t th + log t sat log T Q2 + log T Q3 = 2 × log t th _{log T R2 + log T R3 =} 2 × log t th n> 3 in _{log T Qn -2 -log T Q n} = log T Rn -2 -log T R n = 2 × (log t sat -log t th) ( The display device according to claim 1, wherein T _Qn and T _Rn are both zero if the number is a negative number. 13. A pair of electrodes of the two sub-pixels are connected to each other.
The display device according to claim 1, which consists <br/> part of different scanning electrodes and different information electrodes. 14. The display device according to claim 13, wherein a scanning signal applied to the first sub-pixel and a scanning signal applied to the second sub-pixel are synchronized. 15. The display device according to claim 13, wherein the information signal applied to the first sub-pixel and the information signal applied to the second sub-pixel are synchronized. 16. The display device according to claim 13, wherein a scanning signal waveform applied to the first sub-pixel and a scanning signal waveform applied to the second sub-pixel are symmetric about a central potential. 17. The method according to claim 17, wherein the ferroelectric liquid crystal is chiral smectic.
The display device according to claim 1, wherein the display device is a check liquid crystal.