KR100802306B1 - Liquid Crystal Display Device and Method of Fabricating the same - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device and a method for manufacturing the same, in which a 2-domain is formed in a pixel cell to prevent flicker and widen the viewing angle.

The liquid crystal display according to the present invention includes a first substrate and a second substrate, a plurality of common electrodes divided on the first substrate, an alignment film coated on the first substrate and the second substrate on which the common electrodes are formed, and a first substrate. And a ferroelectric liquid crystal injected between the second substrate and the plurality of domains to form a plurality of domains having different liquid crystal alignment states based on the dividing line of the common electrode.

According to the present invention, the arrangement of liquid crystal molecules in the pixel cell is formed to be 2-domain, thereby preventing the flicker phenomenon of the pixel cell and widening the viewing angle.

Description

Liquid crystal display device and method for manufacturing the same {Liquid Crystal Display Device and Method of Fabricating the same}             

1 is a diagram illustrating a phase transition process of liquid crystals.

2 is a diagram illustrating a monostable state of liquid crystal molecules in a half-V type FLC mode.

3 is a cross-sectional view showing the structure of a liquid crystal cell using a conventional half-V type FLC mode.

4 is a cross-sectional view illustrating a driving state of liquid crystal molecules when a positive voltage is applied to the liquid crystal cell of the half-V type FLC mode shown in FIG. 3.

5 is a graph showing voltage-transmission characteristics of a conventional half-V type FLC.

FIG. 6 is a waveform diagram of driving voltage supplied to the liquid crystal cell of the half-V type FLC mode shown in FIG.

FIG. 7 is a characteristic diagram showing luminance characteristics of the driving voltage waveform shown in FIG. 6; FIG.

8A to 8B are cross-sectional views illustrating a method of manufacturing a ferroelectric liquid crystal display device according to a first embodiment of the present invention.

9A to 9B are cross-sectional views illustrating a method of manufacturing a ferroelectric liquid crystal display device according to a second embodiment of the present invention.

10A to 10C are cross-sectional views illustrating a method of manufacturing a ferroelectric liquid crystal display device according to a third embodiment of the present invention.

FIG. 11 is a waveform diagram illustrating voltage waveforms applied to a ferroelectric liquid crystal display according to an exemplary embodiment of the present invention. FIG.

FIG. 12 is a characteristic diagram showing luminance characteristics of a ferroelectric liquid crystal display device according to an embodiment of the present invention with respect to the voltage waveform shown in FIG.

<Description of Symbols for Main Parts of Drawings>

1, 12: upper substrate 3, 24a, 24b, 28a, 28b, 32: common electrode

5, 7, 18: alignment film 9: thin film transistor array

11, 13: lower substrate 14: black matrix

15, 26: liquid crystal 16: color filter

20: pixel electrode 22: thin film transistor

23: protective film 24, 28: electrode layer

30: insulating film 34, 35: photocurable material

36 mask 36a transparent substrate

36b: opaque metal

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ferroelectric liquid crystal display device and a method for manufacturing the same, and more particularly, to a liquid crystal display device and a method for manufacturing the same, in which a 2-domain is formed in a liquid crystal cell to prevent flicker and widen the viewing angle.

Ferroelectric Liquid Crystal (hereinafter referred to as "FLC") has the fastest response time in the liquid crystal mode of several tens of microseconds to several ms. This is because FLC has spontaneous polarization characteristics without applying an electric field. In addition, FLC enables wide viewing angles such as In-plane Switching (IPS) mode without special electrode structures or compensation films. As a result, FLC is able to cope with a moving image display represented by a liquid crystal TV, which is in the spotlight.

Such liquid crystal modes using FLC are known as Deformed helix FLC (DHFLC), Surface Stabillized FLC (SSFLC), Antiferroelectric Liquid Crystal (AFLC), V Shape FLC, Half-V Shape FLC, etc. have. Among them, the SSFLC mode has only the on / off driving ability as the liquid crystal molecules have only the bistable state, and has a disadvantage in that grayscale implementation is impossible. On the other hand, the V-type FLC and the half-V-type FLC have a mono-stable state in which the liquid crystal molecules are capable of implementing grayscale, and research on this is being actively conducted. In particular, the half-V type FLC has an advantage in that the initial alignment state is excellent compared to the V type FLC, so that the contrast ratio is good and the liquid crystal driving is easy.

Half-V type FLC uses a chiral smectic C (hereinafter referred to as Sm C *) phase maintained at room temperature during the phase transition process of the temperature-transfer type liquid crystal. Generally, the half-V type FLC is isotropic (hereinafter referred to as I) phase → chiral nematic (hereinafter referred to as N *) phase as shown in FIG. → Sm C * phase → It has a phase transition of crystal (Crystal) order. In FIG. 1, when the temperature is lowered on the basis of an isotropic phase without orientation and position order, the liquid crystal molecules become N * phases having a constant orientation. Subsequently, when the temperature is further lowered on the N * phase, the liquid crystal molecules become a Sm C * phase having a positional order, that is, a layer structure, and having a predetermined tilt, with a certain directivity. In general, when the phase transition (secondary transition) from N * to Sm C * via Smetic A phase, the Chevron or Bookself is used as the layer normal direction coincides with the rubbing direction. It forms a bistable state having a stable state at both ends of the virtual cone. On the other hand, in the liquid crystal of the phase sequence of I phase → N * phase → Sm C * phase, the change from N * phase to Sm C * phase is a primary transition, as shown in FIG. 3 with respect to the liquid crystal molecule 15 The layer is inclined in two directions with the rubbing direction as the axis of symmetry. When a DC voltage DC is applied during the phase transition from N * to Sm C *, only one of the two layer directions is selected. As a result, the liquid crystal molecules on Sm C * are in a monostable state in which the spontaneous polarization direction forms a uniform orientation in the direction of the electric field. The monostable liquid crystal molecules 15 are rotated while drawing the outline of the virtual cone based on the normal of the smectic layer according to the external electric field of polarity opposite to that of the alignment to control the grayscale. Done. Looking at the manufacturing method of the half-V-type FLC using the phase transition process of the liquid crystal molecules in detail as follows.

Referring to FIG. 3, a half-V type FLC mode liquid crystal cell includes an upper substrate 1 on which a common electrode 3 and an upper alignment layer 5 are stacked, and a thin film transistor array 9 and a lower alignment layer 7 are stacked. The lower substrate 11 and the liquid crystals 15 injected into the space between the upper and lower substrates 1 and 11. The liquid crystals 15 are injected between the upper and lower substrates 1 and 11 at a temperature having an N * phase or an isotropic phase so as to facilitate liquid crystal injection. Subsequently, when the temperature is lowered to have an N * phase, the liquid crystals 15 are aligned parallel to the rubbing directions of the alignment layers 5 and 7, that is, in the horizontal direction. After the initial orientation, the electric field is applied to the liquid crystals 15 while gradually decreasing the temperature. Accordingly, as shown in FIG. 3, the liquid crystals 15 are stabilized in a monostable state having a uniform orientation in which the spontaneous polarization direction of the liquid crystals 15 coincides with the direction of the electric field while the phase transitions to Sm C * phase. do. The liquid crystals 15 stabilized in the monostable state react only with an electric field having a polarity opposite to that of the electric field. For example, when a negative electric field (-E) is applied when the liquid crystals 15 are phase-transferred onto Sm C *, the spontaneous polarization direction of the liquid crystals 15 is different from that of the electric field as shown in FIG. 3. Are arranged identically. When the negative electric field (-E) is applied to the liquid crystals 15 having such an alignment state, the liquid crystals 15 do not drive. Therefore, it exhibits the same characteristics as the initial orientation. On the other hand, as shown in FIG. 4, when the positive electric field (+ E) is applied to the liquid crystals 15, the liquid crystals 15 are driven, that is, the spontaneous polarization of the liquid crystals 15 causes the virtual cone. The arrangement of the liquid crystals 15 is changed by rotating along the outer edge of the structure. This allows for continuous grayscale implementation. As a result, the half-V type FLC mode liquid crystals 15 have a half-V type voltage-transmission (V-T) characteristic as shown in FIG. 5 when using the orthogonal polarizer.

Referring to FIG. 5, when the initial uniform alignment is formed by using the negative electric field, the transmittance is almost eliminated as the half-V type FLC mode liquid crystals 15 are not driven at the negative voltage. Usually, first and second polarizers having transmission axes perpendicular to each other are disposed above and below the liquid crystal cell. The first polarizer disposed below the liquid crystal cell has the same transmission axis as the initial alignment direction of the liquid crystals 15, and the second polarizer disposed above the liquid crystal cell has a transmission axis perpendicular to the first polarizer. The linearly polarized light transmitted through the first polarizer passes through the liquid crystals 15 which are not driven by the negative polarity as it is and is blocked by the second polarizer, thereby becoming a black state.

On the other hand, when a positive voltage is applied, gray scales can be realized by increasing transmittance as the half-V type FLC mode liquid crystals 15 are driven. This is because the liquid crystals 15 driven by the positive voltage convert the polarization direction of the linearly polarized light transmitted through the first polarizer in parallel with the transmission axis of the second polarizer, thereby allowing the light to pass upward through the second polarizer. Because.

As described above, the half-V type FLC has a voltage-transmitting characteristic that reacts only to a voltage having either a positive polarity or a negative polarity. Accordingly, when the half-V type FLC is driven in the field inversion method as shown in FIG. 7 to prevent liquid crystal deterioration, a section in which the driving voltage of one polarity, that is, the positive driving voltage is applied as shown in FIG. 8. Only the luminance is displayed and the luminance is not displayed in the section where the remaining negative driving voltage is applied. As a result, since the half-V type FLC repeats the black and white states by the field inversion driving voltage, there is a problem in that flicker occurs. To prevent such flicker, the half-V FLC must be driven at high speed. In other words, the conventional half-V type FLC needs to be driven at a high speed of 120 Hz to prevent flicker when a 60 Hz image is realized. However, there is a limit in driving the liquid crystal cell at high speed, and the price of the drive IC is increased, thereby increasing the manufacturing cost of the liquid crystal display device.

Accordingly, an object of the present invention is to provide a liquid crystal display device and a method of manufacturing the same, which can eliminate the flicker phenomenon in the half-V type FLC (HV-FLC) and widen the viewing angle.

In order to achieve the above object, the liquid crystal display device according to the present invention comprises a first substrate and a second substrate; A plurality of common electrodes divided on the first substrate; An alignment layer coated on the first substrate and the second substrate on which the common electrode is formed; And a ferroelectric liquid crystal injected between the first substrate and the second substrate to form a plurality of domains having different liquid crystal alignment states based on the dividing line of the common electrode.

A liquid crystal display device according to the present invention comprises: a first substrate and a second substrate; A common electrode formed on the first substrate; An alignment layer coated on the first substrate and the second substrate on which the common electrode is formed; A ferroelectric liquid crystal is injected between the first substrate and the second substrate with a photocurable material to form a plurality of domains having different liquid crystal alignment states.
A method of manufacturing a liquid crystal display device according to the present invention includes forming a plurality of common electrodes on a first substrate so as to be divided into a plurality; Forming an alignment layer on the first substrate on which the common electrode is formed; Forming an alignment layer on a second substrate corresponding to the first substrate; Preparing a liquid crystal panel by injecting a ferroelectric liquid crystal after bonding the first substrate and the second substrate; Heating the liquid crystal panel such that the ferroelectric liquid crystal is in a nematic (N *) phase state; The liquid crystal alignment state is different according to the dividing line of the plurality of common electrodes by lowering the temperature of the liquid crystal panel below room temperature while applying a voltage of opposite polarity between adjacent common electrodes among the plurality of common electrodes. * (SmC *) characterized in that it comprises the step of creating a state.

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A method of manufacturing a liquid crystal display according to the present invention includes forming a common electrode on a first substrate and then forming an alignment layer on the common electrode; Forming an alignment layer on a second substrate corresponding to the first substrate; Preparing a liquid crystal panel by injecting a ferroelectric liquid crystal and a photocurable material mixed with each other after bonding the first substrate and the second substrate together; Heating the liquid crystal panel such that the ferroelectric liquid crystal is in a nematic (N *) phase state; Lowering the temperature of the liquid crystal panel to room temperature or less while applying a voltage of one polarity to the common electrode to make the ferroelectric liquid crystal in a smear C * (SmC *) phase; Irradiating light onto a first area of the liquid crystal panel using a mask to cure the photocurable material; Heating the liquid crystal panel such that the ferroelectric liquid crystal contained in the second region except for the region including the cured photocurable material is in a nematic (N *) state; Lowering the temperature of the liquid crystal panel to room temperature or less while applying a voltage having a different polarity to the common electrode to form a smeared C * (SmC *) phase of the ferroelectric liquid crystal in the second region; And irradiating light to the second region of the liquid crystal panel using a mask to cure the photocurable material.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 8A to 12.

8A to 8B are cross-sectional views illustrating a method of manufacturing a liquid crystal display device of a half-V type FLC mode according to a first embodiment of the present invention.

Referring to FIG. 8A, in the method of manufacturing a liquid crystal display according to the first embodiment of the present invention, after the electrode layer 24 is formed on the upper substrate 12 on which the color filter 16 and the black matrix 14 are provided. The first common electrode 24a and the second common electrode 24b are formed by patterning the electrode layer 24 into two parts in the liquid crystal cell using a mask. An alignment layer 18 is formed on the first common electrode 24a and the second common electrode 24b. The pixel electrode 20 and the alignment layer 18 are sequentially formed on the lower substrate 13 on which the passivation layer 23 and the thin film transistor 22 are provided. The alignment layer 18 formed on the upper substrate 12 and the lower substrate 13 is oriented in a predetermined state through rubbing. After completion of the alignment, the upper substrate 12 and the lower substrate 13 are bonded to face each other, and the liquid crystal molecules 26 are injected therebetween. The liquid crystal molecules 26 injected into the upper substrate 12 and the lower substrate 13 have upper and lower bidirectional directions with the normal of the schematic layer not shown by the alignment layer 18 oriented in a predetermined state as an axis. It is rearranged into two stable states 26a and 26b. In this manner, the liquid crystal molecules 26 are mixed in two stable states 26a and 26b to apply a temperature to the liquid crystal panels arranged to raise the temperature of the liquid crystal panel. Due to the elevated temperature, the liquid crystal molecules 26 are converted to the N * phase. Subsequently, as shown in FIG. 8B, the voltage (+ V) applied to the first common electrode 24a is set higher than the voltage applied to the pixel electrode 20 so that the liquid crystal molecules 26 converted to N * phase are aligned to one side. To be arranged. In addition, the liquid crystal molecules 26 converted to N * phase by setting the voltage (-V) applied to the second common electrode 24b to be lower than the voltage applied to the pixel electrode 20 become the first common electrode 24a. The rearranged liquid crystal molecules 26 are arranged side by side in a direction corresponding to the rearranged liquid crystal molecules 26. At the same time, by lowering the temperature of the liquid crystal panel, the liquid crystal molecules 26 in the nematic phase (N *) state arranged side by side in the uniaxial direction by external voltage become SmC * states at a predetermined temperature, and thus the liquid crystal molecules 26 The arrangement of is stabilized. Accordingly, the liquid crystal molecules 26 are separated between the first common electrode 24a and the second common electrode 24b for each liquid crystal cell with reference to the normal line of the smectic layer, and the upper direction 26a and the lower side thereof. Two domains are formed which are arranged in the direction 26b. In other words, two domains having different spontaneous polarization directions Ps of the liquid crystal molecules 26 are formed for each liquid crystal cell.

9A to 9B are cross-sectional views illustrating a method of manufacturing a liquid crystal display device of a half-V type FLC mode according to a second embodiment of the present invention.

Referring to FIG. 9A, first, in the method of manufacturing a liquid crystal display according to the second embodiment of the present invention, an electrode layer 28 is deposited on an upper substrate 12 provided with a color filter 16 and a black matrix 14. Subsequently, a portion of the liquid crystal cell is removed using a mask to form the first common electrode 28a. The insulating film 30 is entirely coated on the upper substrate 12 on which the first common electrode 28a is formed. After the electrode layer 28 is entirely deposited on the upper substrate 12 having the entire surface of the insulating film 30 coated thereon, a portion of the second common electrode 28b is removed by removing a portion overlapping with the first common electrode 28a using a mask. Will form. The alignment layer 18 is entirely formed on the upper substrate 12 on which the second common electrode 28b is formed. The pixel electrode 20 and the alignment layer 18 are sequentially formed on the lower substrate 13 on which the passivation layer 23 and the thin film transistor 22 are provided. The alignment layer 18 formed on the upper substrate 12 and the lower substrate 13 is oriented in a predetermined state through rubbing. After completion of the alignment, the upper substrate 12 and the lower substrate 13 are bonded to face each other, and the liquid crystal molecules 26 are injected therebetween. The liquid crystal molecules 26 injected into the upper substrate 12 and the lower substrate 13 have upper and lower bidirectional directions with the normal of the schematic layer not shown by the alignment layer 18 oriented in a predetermined state as an axis. It is rearranged into two stable states 26a and 26b. Subsequently, the liquid crystal molecules 26 are mixed in two stable states 26a and 26b to apply a temperature to the arranged liquid crystal panels to raise the temperature of the liquid crystal panels. Due to the elevated temperature, the liquid crystal molecules 26 are converted to the N * phase. Then, as shown in FIG. 9B, the liquid crystal molecule 26 converted to N * phase is set to one side by setting the voltage (+ V) applied to the first common electrode 28a higher than the voltage applied to the pixel electrode 20. Make sure they are arranged side by side. In addition, the liquid crystal molecules 26 converted to N * phase by setting the voltage (-V) applied to the second common electrode 28b to be lower than the voltage applied to the pixel electrode 20 become the first common electrode 28a. The liquid crystal molecules 26 are rearranged in a direction corresponding to the rearranged liquid crystal molecules 26. At the same time, by lowering the temperature of the liquid crystal panel, the N * phase liquid crystal molecules 26 arranged side by side in the uniaxial direction by external voltage become SmC * state at a predetermined temperature, thereby stabilizing the liquid crystal array. Accordingly, the liquid crystal molecules are separated in each of the liquid crystal cells based on the first common electrode 28a and the second common electrode 28b in the upper direction 26a and the lower direction 26b with the normal of the smectic layer as an axis. 2 domains are formed.

10A to 10C are cross-sectional views illustrating a method of manufacturing a half-V type FLC mode liquid crystal display device according to a third embodiment of the present invention.

Referring to FIG. 10A, in the manufacturing method of the liquid crystal display according to the third exemplary embodiment, the upper substrate on which the color filter 16, the black matrix 14, the common electrode 32, and the alignment layer 18 are sequentially formed (12) and the lower substrate 13 in which the protective film 23, the thin film transistor 22, the pixel electrode 20, and the alignment film 18 are sequentially formed. The alignment layer 18 formed on the upper substrate 12 and the lower substrate 13 is oriented in a predetermined state through rubbing. Then, the upper substrate 12 and the lower substrate 13 are bonded to face each other, and then the liquid crystal molecules 26 and the photocurable material 34 are mixed and injected in a predetermined ratio therebetween. The liquid crystal molecules 26 injected into the upper substrate 12 and the lower substrate 13 have upper and lower bidirectional directions with the normal of the schematic layer not shown by the alignment layer 18 oriented in a predetermined state as an axis. It is rearranged into two stable states 26a and 26b. In this way, the liquid crystal molecules 26 are mixed in two stable states 26a and 26b to apply a temperature to the arranged liquid crystal panels to raise the temperature of the liquid crystal panels. Due to the elevated temperature, the liquid crystal molecules 26 are converted to the N * phase. Then, as shown in FIG. 10B, a lower voltage (-V) is applied to the common electrode 32 than the pixel electrode 20 so that the liquid crystal molecules converted to N * phase are arranged in one direction. At the same time, by lowering the temperature of the liquid crystal panel, the N * -phase liquid crystal molecules 26 arranged side by side by an external voltage become SmC * states at a predetermined temperature to stabilize the liquid crystal array. On the upper substrate 12 having the liquid crystal molecules 26 arranged in one direction, the transparent substrate 36a and a portion of the mask 36 provided with the opaque metal 36b are covered and irradiated with light. At this time, the light irradiated from the outside transmits the transparent substrate 36a in the mask 36 while the opaque metal 36b does not transmit. For this reason, the light irradiated from the outside is irradiated only to a part of the upper substrate 12 except for the portion covered by the opaque metal 36b. Light irradiated only to a portion of the upper substrate 12 is irradiated to the liquid crystal molecules 26 and the photocurable material 34 that are mixed at a predetermined ratio through the upper substrate 12. In response to this light, the photocurable material 35 becomes networked. The liquid crystal molecules 26 are cured in a SmC * phase state arranged side by side in the upper direction 26a with the axis normal line as the axis by the photocurable material 35 which forms a network image in response to light.

Then, the temperature is again applied to the liquid crystal panel to raise the temperature of the liquid crystal panel. Only the liquid crystal molecules 26 in the region not cured by the photocurable material 35 are converted to the N * phase by the external temperature due to the elevated temperature. In addition, as shown in FIG. 10C, a voltage (+ V) higher than that of the pixel electrode 20 is applied to the common electrode 32 so that the liquid crystal molecules 26 of the N * phase are lower than the voltage applied to the pixel electrode 20. -V) is rearranged in parallel with the liquid crystal molecules 26 in the applied common electrode 32 in different directions. At the same time, by lowering the temperature of the liquid crystal panel, the liquid crystal molecules 26 of N * phase rearranged side by side by an external voltage become SmC * at a predetermined temperature, thereby stabilizing the liquid crystal array. Next, the liquid crystal molecules 26 and the uncured photocurable material 35 in the SmC * state are present by using the mask 36 having the opaque metal 36b formed on the transparent substrate 36a and a part thereof. The light is irradiated onto the upper substrate 12. In this way, the light irradiated on the upper substrate 12 is irradiated to the liquid crystal molecules 26 and the uncured photocurable material 34 mixed through the upper substrate 12 in a predetermined ratio. In response to this light, the photocurable material 34 becomes networked. The cured photocurable material 35 stabilizes the liquid crystal molecules 26 in an SmC * phase state arranged side by side in the upward direction 26a with an axis perpendicular to the smectic layer. As a result, in one liquid crystal cell, two domains in which liquid crystal molecules are arranged in the upper direction 26a and the lower direction 26b are formed with the normal of the smectic layer as an axis. Here, the photocurable material 35 is a monomer or an oligomer.

As described above, the liquid crystal display device of the half-V type FLC mode according to the present invention forms two domains in which the spontaneous polarization directions of liquid crystal molecules are arranged differently in one liquid crystal cell, thereby forming a liquid crystal array state in each liquid crystal cell in a black state and a white state. Is made to exist at the same time. In the case of applying a field inversion field in which positive and negative electric fields are alternately applied to the liquid crystal display of the two domain half-V type FLC mode, as shown in FIG. The luminance does not change, and the black state and the white state alternately operate, thereby preventing the flicker phenomenon that has occurred conventionally. Therefore, the high-speed drive to solve the existing flicker is not required, thereby reducing the cost of the driver IC. In addition, due to the relative compensation of the two domains it is possible to obtain a wider viewing angle than conventional.

As described above, the liquid crystal display device and the manufacturing method thereof according to the present invention can prevent the flicker phenomenon and widen the viewing angle by forming the arrangement state of the liquid crystal molecules in the liquid crystal cell to be 2-domain.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

A first substrate and a second substrate; A plurality of common electrodes divided on the first substrate; An alignment layer coated on the first substrate and the second substrate on which the common electrode is formed; And a ferroelectric liquid crystal which is injected between the first substrate and the second substrate to form a plurality of domains having different liquid crystal alignment states based on the dividing line of the common electrode. The method of claim 1, And wherein the divided plurality of common electrodes are formed on different layers from adjacent common electrodes. A first substrate and a second substrate; A common electrode formed on the first substrate; An alignment layer coated on the first substrate and the second substrate on which the common electrode is formed; And a ferroelectric liquid crystal injecting between the first substrate and the second substrate with a photocurable material to form a plurality of domains having different liquid crystal alignment states. Forming a plurality of common electrodes to be divided into a plurality on the first substrate; Forming an alignment layer on the first substrate on which the common electrode is formed; Forming an alignment layer on a second substrate corresponding to the first substrate; Preparing a liquid crystal panel by injecting a ferroelectric liquid crystal after bonding the first substrate and the second substrate; Heating the liquid crystal panel such that the ferroelectric liquid crystal is in a nematic (N *) phase state; The liquid crystal alignment state is different from each other based on the dividing line of the plurality of common electrodes by lowering the temperature of the liquid crystal panel below room temperature while applying a voltage of opposite polarity between common electrodes adjacent to each other among the plurality of common electrodes. * (SmC *) manufacturing method of the liquid crystal display device comprising the step of making a state. The method of claim 4, wherein Forming the common electrode, And forming common electrodes adjacent to each other in different layers. Forming a common electrode on the first substrate and then forming an alignment layer on the common electrode; Forming an alignment layer on a second substrate corresponding to the first substrate; Preparing a liquid crystal panel by injecting a ferroelectric liquid crystal and a photocurable material mixed with each other after bonding the first substrate and the second substrate together; Heating the liquid crystal panel such that the ferroelectric liquid crystal is in a nematic (N *) phase state; Lowering the temperature of the liquid crystal panel to room temperature or less while applying a voltage of one polarity to the common electrode to make the ferroelectric liquid crystal in a smear C * (SmC *) phase; Irradiating light onto a first area of the liquid crystal panel using a mask to cure the photocurable material; Heating the liquid crystal panel such that the ferroelectric liquid crystal contained in the second region except for the region including the cured photocurable material is in a nematic (N *) state; Lowering the temperature of the liquid crystal panel to room temperature or less while applying a voltage having a different polarity to the common electrode to form a smeared C * (SmC *) phase of the ferroelectric liquid crystal in the second region; And irradiating light to a second area of the liquid crystal panel using a mask to cure the photocurable material.

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