WO2014178608A1

WO2014178608A1 - Electric field-driven display device

Info

Publication number: WO2014178608A1
Application number: PCT/KR2014/003779
Authority: WO
Inventors: 홍문표; 윤호원; 최낙초
Original assignee: 고려대학교 산학협력단
Priority date: 2013-04-30
Filing date: 2014-04-29
Publication date: 2014-11-06
Also published as: KR20140129802A; KR101845370B1

Abstract

An electric field-driven display device comprises: a first substrate; first and second control circuits on the first substrate; an insulation layer positioned on the substrate so as to cover the first and second control circuits; a first and second contact electrodes on the insulation layer; a second substrate facing the first substrate; a barrier structure interposed between the first and second substrates to define a plurality of spaces by means of horizontal and vertical barriers; a driving body disposed in the space, and provided with a first driving part comprising conductive particles and a second driving part comprising cholesteric liquid crystal, so that the driving body can move due to the potential difference between the first and second contact electrodes and the first and second control circuits; and a shading member, disposed on the second substrate, for defining an open area and a shaded area and equipped so as to be opened or closed in accordance with the movement of the driving body.

Description

Field drive display

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flat panel display, and more particularly, to an electric field drive display.

Currently known flat panel displays include liquid crystal displays (LCDs), plasma display panels (PDPs), organic light emitting displays (OLEDs), field effect displays (field effects). display (FED), and electrophoretic display devices.

Among them, liquid crystal displays are widely used as monitors and televisions. Plasma displays are widely used as large televisions. Organic electroluminescent displays are used for mobile phone windows, and researches for applying them to medium and large display devices are being actively conducted. . Other field effect display devices and electrophoretic display devices are also being researched for application to monitors, televisions, or electronic papers.

In particular, as a display device applied to an electronic paper, a reflective electrophoretic display device having a texture similar to that of paper is typical, but has a disadvantage of high driving voltage, slow response speed, and difficulty in expressing gray scales. In addition, there is a problem that a color filter must be used for color expression.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an electric field driving display device capable of easily displaying various colors without using a color filter.

An electric field driving display device according to an exemplary embodiment of the present invention may include a first control electrode and a second control electrode formed on a first substrate and the first substrate, and spaced apart from each other, and the first control electrode and the second control electrode. An insulating layer formed on the first substrate so as to cover the first substrate, a first contact electrode and a second contact electrode formed on the insulating layer, a second substrate disposed to face the first substrate, the first substrate and the second substrate; A barrier rib structure interposed between the substrate and defining a plurality of spaces as a horizontal barrier rib and a vertical barrier rib, the barrier rib structure having a first driving unit made of conductive particles and a second driving unit made of cholesteric liquid crystal disposed in the space; And a driving body provided to move by a potential difference between the second contact electrodes and the first and second control electrodes and the second substrate, and to be opened and closed according to the movement of the driving body. And a light blocking member defining an provided opening area and a light blocking area.

In example embodiments, the first contact electrode may include a first contact electrode stem portion intersecting the first control electrode and a second control electrode and a plurality of first contacts protruding from the first contact electrode stem portion. An electrode branch, wherein the second contact electrode includes a second contact electrode stem intersecting the first control electrode and the second control electrode, and a plurality of second contact electrode branches protruding from the second contact electrode stem; It may include parts.

Here, each of the first contact electrode branch portions may overlap the first control electrode, and each of the second contact electrode branch portions may be disposed to overlap the second control electrode.

In addition, each of the first contact electrode branch parts may be disposed to correspond to the opening area, and each of the second contact electrode branch parts may be disposed to correspond to the light blocking area.

Meanwhile, the first contact electrode branch portion includes a first field induction portion protruding from an edge toward the second contact electrode branch portion, and the second contact electrode branch portion protrudes from the edge toward the first contact electrode branch portion. It may include an electric field induction part.

Further, each of the first and second contact battery branches may be alternately disposed along the first contact electrode stem portion and the second contact electrode stem portion. Here, one of the first contact electrode branches and one of the second contact electrode branches may be disposed in each of the spaces.

In one embodiment of the present disclosure, one first control electrode and one second control electrode may be disposed in each of the spaces.

In one embodiment of the present invention, the first contact electrode and the second contact electrode may have a mutual potential difference.

In one embodiment of the present invention, the drive body may have a width in the horizontal direction greater than the opening.

In one embodiment of the present invention, the driver may not have a permanent charge. Here, the first driving unit may include insulating particles made of an insulating polymer material and a conductive material provided to cover the insulating particles.

The electric field driving display device according to the exemplary embodiment may further include a backlight unit configured to supply light toward the first substrate. Here, the first contact electrode and the first control electrode may be made of a transparent conductive material. In addition, the first driving unit may be made of a non-transparent conductive material.

The electric field driving display device according to an exemplary embodiment of the present invention may further include a light blocking film disposed between the first substrate and the first control electrode and the second control electrode.

In an embodiment, a field driving display device includes: a lower alignment layer formed on the first contact electrode and the second contact electrode; And an upper alignment layer formed on the blocking member. Here, the lower alignment layer and the upper alignment layer may include a vertical alignment layer.

According to embodiments of the present invention, by adjusting the position of the driving body in the horizontal direction by using the electric force formed in the horizontal direction it is possible to display the desired image by controlling the amount of light transmitted. Further, by forming the first control electrode and the second control electrode, the position of the driving body can be precisely adjusted, and the transmission amount of light can be adjusted more precisely by controlling the moving speed of the driving body, thereby realizing various grayscale images. . In addition, various colors may be displayed without forming a color filter including a cholesteric liquid crystal.

1 is a plan view of an electric field driving display device according to an exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view of the electric field driving display device of FIG. 1 taken along line II-II. FIG.

3 is a perspective view for explaining a cholesteric liquid crystal.

4 is a graph showing the light reflection characteristics of the cholesteric liquid crystal.

5 and 6 are cross-sectional views illustrating driving of an electric field driving display device according to the present invention.

7 is a plan view of an electric field driving display device according to an exemplary embodiment of the present invention.

8 is a cross-sectional view of an electric field driving display device according to an exemplary embodiment of the present invention.

9 and 10 are cross-sectional views illustrating phosphors for driving the electric field driving display device of FIG. 8.

11 is a cross-sectional view of an electric field driving display device according to an exemplary embodiment of the present invention.

12 is a plan view of an electric field driving display device according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to the specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In the accompanying drawings, the size and amount of the objects are shown to be enlarged or reduced than actual for clarity of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "include" are intended to indicate that there is a feature, step, function, component, or combination thereof described on the specification, and other features, steps, functions, components Or it does not exclude in advance the possibility of the presence or addition of them in combination.

On the other hand, unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

1 is a plan view of an electric field driving display device according to an exemplary embodiment of the present invention. FIG. 2 is a cross-sectional view of the electric field driving display device of FIG. 1 taken along line II-II. FIG. 3 is a perspective view showing a cholesteric liquid crystal. 4 is a graph showing the light reflection characteristics of the cholesteric liquid crystal.

1 and 2, the electric field driving display device 1001 according to an exemplary embodiment of the present invention may include a first substrate 100, a second substrate 200 facing the first substrate 100, The barrier rib structure 310 may be disposed between the first substrate 100 and the second substrate 200, and the driving body 400 may include the first driving unit 42 and the second driving unit 44.

The first substrate 100 and the second substrate 200 may be transparent insulating materials, for example, glass substrates or polymer substrates. Polymer materials include polyethersulphone (PES), polyacrylate (PAR, polyacrylate), polyether imide (PEI, polyetherimide), polyethylene naphthalate (PEN, polyethyelenennapthalate), polyethylene terephthalate (PET, polyethyeleneterepthalate) Phenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose tri acetate (TAC), cellulose acetate propionate (CAP) or these It may include a mixture of.

The light blocking film 70 is formed on the first substrate 100.

The light blocking film 70 is for preventing light from being emitted to the outside, and may be made of an insulating material including a black pigment or a metal such as chromium.

The first control electrode 121 and the second control electrode 122 are formed on the light blocking film 70.

The first control electrode 121 and the second control electrode 122 may be made of an opaque conductive material such as Cr, Al, Mo, Ag, Cu, or the like.

An insulating layer 160 is formed on the first control electrode 121 and the second control electrode 122.

The insulating layer 160 has a single layer structure made of an organic layer and may have photosensitivity. In addition, the insulating film 160 may be formed of an inorganic film such as silicon nitride and silicon oxide, and may have a multilayer film structure of an inorganic film and an organic film.

The first contact electrode 131 and the second contact electrode 141 are formed on the insulating layer 160.

The first contact electrode 131 and the second contact electrode 141 extend in a direction crossing the first control electrode 121 and the second control electrode 122 and are separated from each other. ) And a plurality of first contact electrode branch portions 35 and second protruding from the second contact electrode stem portion 43, the first contact electrode stem portion 33, and the second contact electrode stem portion 43, respectively. The contact electrode branch part 45 is included. The first contact electrode branch portion 35 protrudes toward the second contact electrode stem portion 43, and the second contact electrode branch portion 45 protrudes toward the first contact electrode stem portion 33. The first contact electrode branch part 35 and the second contact electrode branch part 45 are alternately arranged along the first contact electrode stem part 33 and the second contact electrode stem part 43.

The first contact electrode branch part 35 and the second contact electrode branch part 45 extend in the same direction as the first control electrode 121 and the second control electrode 122, and respectively, the first control electrode 121. And the second control electrode 122.

The first contact electrode 131 and the second contact electrode 141 may be made of an opaque conductive material such as Cr, Al, Mo, Ag, Cu, or the like.

The light blocking member 190 is formed on one surface of the second substrate 200 facing the first substrate 100.

The light blocking member 190 is for preventing light from being emitted to the outside and may be made of an insulating material including a black pigment or a metal such as chromium. The light blocking member 190 includes an opening 95 that is opened and closed according to the movement of the driving member 400.

In the following description, the region corresponding to the opening 95 of the light blocking member 190 is referred to as the opening region T1, and the region corresponding to the light blocking member 190 except for the opening region T1 is referred to as the light blocking region. It is called (T2).

Meanwhile, the partition structure 310 is formed of a horizontal partition wall and a vertical partition wall, and the horizontal partition wall and the vertical partition wall cross each other to form a space 90 surrounded by the partition wall. The space 90 surrounded by the barrier rib structure 310 defines one pixel area of the electric field driving display device.

The space 90 measures the velocity of an inert gas such as dry air that does not interfere with the movement of the first driver 42, or an inert gas such as nitrogen (N ₂ ) that does not carry charge and does not react with the material. It may be filled with a silicone oil, a fluorocarbon fluid, and the like having an insulating property and a low dielectric constant to intentionally lower and increase driving stability.

The barrier rib structure 310 prevents light from neighboring pixel regions from being transmitted. In order to prevent unnecessary light from penetrating the barrier rib structure 310 or reflected from the barrier rib structure 310, the display quality is deteriorated. It is made of an opaque material that does not, and may be made of a photosensitive material including a black pigment.

The driver 400 includes a first driver 42 made of conductive particles having a spherical shape and no permanent charge, and a second driver 44 made of cholesteric liquid crystal. The first driving unit 42 may be formed of an insulating particle made of a polymer material and a non-transparent conductive film formed on the surface of the insulating particle. Alternatively, the first driver 42 may be made only of a non-transparent conductive material such as metal. When the first driving unit 42 is formed of insulating particles including a polymer material such as a copolymer such as polymethylmethacrylate (PMMA), the weight is relatively lighter than that of the first driving unit 42 made of metal. Can have a faster and more complete spherical shape. Therefore, the first driving unit 42 may operate at a high speed by a driving voltage of about a few volts (V), and precise adjustment is possible.

Since the operation speed of the first driver 42 is inversely proportional to the weight, the weight may be reduced by forming a cavity in the center of the first driver 42.

It is preferable that the width W1 of the opening 95 is smaller than the width W2 of the driving body 42 so that the first driving part 42 completely covers the opening 95.

As shown in FIG. 3, the second driver 44 is a cholesteric liquid crystal twisted to have a constant pitch, and the reflected color varies according to the twisted pitch. In this case, the wavelength of the reflected color can be seen in FIG. 4. Referring to FIG. 4, a shorter pitch reflects shorter wavelengths, and a longer pitch reflects longer wavelengths, and the product of the average refractive index and the pitch of the liquid crystal has a center value of the reflected wavelength. When the refractive index of the liquid crystal is 1.5 to 1.6, the pitch for reflecting the green wavelength of 550 nm is 340 nm to 350 nm. Therefore, if the pitch is adjusted according to the wavelength to be reflected, light of various wavelengths can be reflected.

The pitch of the second driver 44 may add a chiral dopant and adjust the amount of the chiral dopant.

The above-described electric field driving display device uses a first electric field generated by applying a voltage to the first contact electrode 131, the second contact electrode 141, the first control electrode 121, and the second control electrode 122. It can display by moving the position of the drive part 42.

This will be described in detail with reference to FIGS. 5 and 6.

5 and 6 are cross-sectional views illustrating driving of an electric field driving display device according to an exemplary embodiment of the present invention.

5 and 6, a first contact electrode 131, a second contact electrode 141, a first control electrode 121, and a second control electrode of an electric field driving display device according to an exemplary embodiment of the present invention. When each voltage is applied to the 122, the first driver 42 is charged with the same polarity as that of the first contact electrode 131 or the second contact electrode 141.

Specifically, a positive voltage is applied to the first contact electrode 131 and the first control electrode 121, and a negative voltage is applied to the second contact electrode 141 and the second control electrode 122. When the driver 400 is positioned on the first contact electrode 131, the first driver 42 is charged with a positive voltage.

In this case, (+) and (-) refer to a high voltage and a low voltage relatively to the reference value.

Subsequently, when the first driver 42 is charged with the same size as the first contact electrode 131 and the potential difference with the first contact electrode 131 disappears, the first driver 42 has a second contact electrode having an opposite polarity ( Go to 141). When the first driver 42 is charged with the negative voltage of the second contact electrode 141 and the potential difference disappears, the first driver 42 moves to the first contact electrode 131 again.

When the first contact electrode 131, the second contact electrode 141, the first control electrode 121, and the second control electrode 122 are maintained under the same condition, the first driver 42 may be configured as the first contact electrode ( 131 is repeatedly moved between the second contact electrode 141 at a constant speed.

On the other hand, as shown in FIG. 5, when the first driver 42 is positioned on the first contact electrode 131, the opening 95 is completely covered by the first driver 42, and thus light is not transmitted and black is displayed. As shown in FIG. 6, when the first driver 42 is positioned on the second contact electrode 141, the opening 95 is not covered by the first driver 42, so that light incident from the outside is transmitted to the first contact electrode. Since the light is reflected by 131 and emitted, the color determined by the white or second driver 44 is displayed.

In this case, when the first control electrode 121 applies the same voltage as the first contact electrode 131 and the second control electrode 122 applies the same voltage as the second contact electrode 141, the driving body repeatedly moves. do.

However, when different voltages are applied to the first control electrode 121 and the second control electrode 122, the driving body can be kept in the opening region or the light shielding region without being repeatedly moved.

For example, when 0V and 10V are respectively applied to the first contact electrode 131 of the opening area and the second contact electrode 141 of the light blocking area, the first control electrode 121 and the second control electrode 122 are respectively applied. Applying 10V to each of the first driver 42 is located in the opening area. This is because the first driver 42 is constrained by an electric field formed between the first contact electrode 131 and the first control electrode 121, and thus, the first control electrode 121 is closer than the second contact electrode 141. The driving body is constrained to the electric field to be formed.

On the contrary, when 0 V is applied to the first control electrode 131 and the second control electrode 141, the first driver 42 is positioned in the light blocking area. This is because the driving body is constrained by the electric field formed between the second contact electrode 141 and the second control electrode 122, and thus, the driving body is driven by the electric field by the second control electrode 122 closer than the first contact electrode 131. Sieve is constrained.

As such, by varying the voltages applied to the first control electrode 121 and the second control electrode 122, the opening and closing time of the pixel may be variously controlled, and various gray levels may be displayed therefrom.

Since the opening and closing time of the pixel is opened and closed in accordance with the movement of the first driver 42, when the average of the opening and closing times is obtained, various gray levels may be displayed according to the amount of light transmitted. That is, when the first driving unit repeatedly moves for a certain time and averages the time of displaying black and the time of displaying white or color, the time of displaying black is more black than the time of displaying white or color. In contrast, if gray or color close to is displayed and white is more time than black, more gray or color closer to white can be displayed. Therefore, various gray levels can be displayed by adjusting the moving speed of the first driving unit. can do.

In addition, when various control voltages are applied to the first control electrode and the second control electrode for each pixel region, electric fields having various sizes can be formed, so that various gray levels can be displayed for each pixel region, so that a more accurate image can be displayed. have.

In addition, when the pitch P of the second driver 44 is formed differently for each pixel region, various colors may be displayed for each pixel region.

Since most of the configurations included in the electric field driving display device according to the exemplary embodiment of the present invention are the same as those of the electric field driving display device of FIGS. 1 and 2, only other parts will be described in detail.

Referring to FIG. 7, an electric field driving display apparatus 1002 according to an exemplary embodiment of the present invention may include a first substrate 100 and a second substrate (not shown), a first substrate 100, and a second substrate facing each other. The first driving part 42 and the second driving part 44 are located in the pixel structure, which is a partition 90 having a horizontal partition and a vertical partition, and a space 90 defined by the partition structure 310. It includes a driving body 400 having.

The first control electrode 121 and the second control electrode 122 are elongated in the vertical direction, and the first contact electrode 131 and the second contact electrode 141 are the first control electrode 121 and the second. The first contact electrode stem part 33 and the second contact electrode stem part 43 extending in a direction crossing the control electrode 122 and protrude therefrom, respectively, the first control electrode 121 and the second control electrode ( And a first contact electrode branch portion 35 and a second contact electrode branch portion 45 overlapping with each other. A light blocking member 190 having an opening 95 exposing the driving member 400 is formed.

The electric field driving display device according to an exemplary embodiment of the present invention further includes a first electric field induction part 37 and a second electric field induction part 47.

The first field induction part 37 protrudes from the edge of the first contact electrode branch part 35 toward the second contact electrode branch part 45, and the second field induction part 47 is the second contact electrode branch part 45. Protruding toward the first contact electrode branch portion 35 from the edge of < RTI ID = 0.0 >

The first electric field induction part 37 and the second electric field induction part 47 are for concentrating an electric field, such as a lightning rod, and may be triangular in a pointed shape.

As such, when the first electric field induction part 37 and the second electric field induction part 47 are formed, the electric field is concentrated and the first driving part 42 can be easily moved.

8 is a cross-sectional view of an electric field driving display device according to an exemplary embodiment of the present invention. 9 and 10 are cross-sectional views illustrating driving of the electric field driving display device of FIG. 8.

Referring to FIG. 8, an electric field driving display device 1003 according to an exemplary embodiment of the present invention may include a first substrate 100, a first control electrode 121, and a second control formed on the first substrate 100. An electrode 122, an insulating layer 160 positioned on the first control electrode and the second control electrode, a first contact electrode 131 and a second contact electrode 141 positioned on the insulating layer 160, and including a first electrode A second substrate 200 facing the substrate 100 and a light blocking member 190 positioned on the second substrate 200 and having an opening 95 are included.

The partition structure 310 is positioned between the first substrate 100 and the second substrate 200 to form a space 90, which is a pixel region in which the first driver 42 moves.

The electric field driving display device according to the exemplary embodiment of the present invention further includes a backlight unit 500, and the first contact electrode 131 and the first control electrode 121 are made of a transparent conductive material such as ITO or IZO. In this case, the second contact electrode 141 and the second control electrode 122 may be made of a transparent conductive material, such as the first contact electrode 131 and the first control electrode 121, but may be made of an opaque conductive material. have.

The backlight unit 500 is a part for supplying light to the display panel 600, a light guide plate 51 and a light guide plate for converting light emitted from a lamp 53 that emits light and a lamp 53 that is a linear or point light source into a surface light source. A light collecting lens 55 collects the light emitted from the 51 and proceeds to an opening which is a display area. The lamp 53 may be a linear light source such as a cold cathode fluorescent lamp (CCFL) or an external electrode fluorescent lamp (EEFL), or a point light source such as a light emitting diode (LED). Alternatively, a surface light source may be used, and in this case, the light guide plate 51 may be omitted. In addition, the condenser lens 55 may be formed directly or in one layer on the surface of the light guide plate 51 or in a separate film form, and may be formed in one layer on the display panel 600 side.

The backlight unit 500 may be disposed on either the first substrate 100 side or the second substrate 200 side.

In the electric field driving display device 1003 according to an embodiment of the present invention, the first contact electrode and the first control electrode may be made of a transparent conductive material. As illustrated in FIG. 9, the electric field driving display device 1003 of FIG. 8 transmits light transmitted from the backlight unit 500 when the first driver 42 is positioned on the first contact electrode 131. Black is displayed because it is blocked by 42) and cannot be released to the outside. Meanwhile, as shown in FIG. 10, when the first driving unit 42 is positioned on the second contact electrode 141, the light transmitted from the backlight unit 500 is transferred to the first contact electrode 131 and the first control electrode ( Since the light penetrates 121 and is emitted to the outside, it represents white or a color determined by the second driver 44.

Referring to FIG. 11, an electric field driving display device 1004 according to an exemplary embodiment of the present invention may include a first substrate 100, a first control electrode 121, and a second control formed on the first substrate 100. An electrode 122, an insulating layer 160 positioned on the first control electrode and the second control electrode, a first contact electrode 131 and a second contact electrode 141 positioned on the insulating layer 160, and including a first electrode A second substrate 200 facing the substrate 100 and a light blocking member 190 positioned on the second substrate 200 and having an opening 95 are included.

The electric field driving display device 1004 further includes a lower alignment layer 11 positioned on the first contact electrode 131 and a second contact electrode 141 and an upper alignment layer 12 positioned on the blocking member 190. . The lower alignment layer 11 and the upper alignment layer 12 may be made of polyimide as a vertical alignment layer.

Therefore, by further including the field driving display device alignment layers 11 and 12 according to the exemplary embodiment, the viewing angle dependency of the display device may be reduced.

Referring to FIG. 12, an electric field driving display device 1005 according to an exemplary embodiment of the present invention may include a first substrate 100 and a second substrate (not shown), a first substrate 100, and a second substrate facing each other. The barrier rib structure 310 includes a barrier rib structure 310 positioned between the substrates and having a horizontal barrier rib and a vertical barrier rib, and a driver 400 positioned in a pixel region, which is a space 90 defined by the barrier rib structure 310.

An electric field driving display of an electric field driving display device according to an exemplary embodiment of the present invention includes a plurality of openings 95 in one pixel area, and includes a plurality of first driving units 42 corresponding to each of the openings 95. Include.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

The electric field driving display device according to the embodiments of the present invention may be applied to a mobile device such as a mobile phone to which a display is applicable, a television, a monitor, a billboard, and the like.

Claims

A first substrate;

First and second control electrodes formed on the first substrate and spaced apart from each other;

An insulating layer formed on the first substrate to cover the first control electrode and the second control electrode;

A first contact electrode and a second contact electrode formed on the insulating layer;

A second substrate disposed to face the first substrate;

A barrier rib structure interposed between the first substrate and the second substrate and defining a plurality of spaces as horizontal and vertical barrier ribs;

A first driving part made of conductive particles and a second driving part made of cholesteric liquid crystal and disposed in the space and moved by a potential difference between the first and second contact electrodes and the first and second control electrodes; A driving body provided to be able to; And

And a light blocking member formed on the second substrate and defining an opening area and a light blocking area provided to be opened and closed according to the movement of the driving body.
2. The first contact electrode of claim 1, wherein the first contact electrode intersects the first control electrode and the second control electrode, and the plurality of first contact electrode branches protruding from the first contact electrode stem. Including,

The second contact electrode may include a second contact electrode stem portion crossing the first control electrode and the second control electrode and a plurality of second contact electrode branch portions protruding from the second contact electrode stem portion. Electric field drive display device.
The electric field driving display device of claim 2, wherein each of the first contact electrode branch portions overlaps the first control electrode, and each of the second contact electrode branch portions overlaps the second control electrode. .
3. The electric field driving display device of claim 2, wherein each of the first contact electrode branches is disposed to correspond to the opening area, and each of the second contact electrode branches is disposed to correspond to the light blocking area.
The method of claim 2, wherein the first contact electrode branch portion includes a first electric field induction portion protruding from an edge toward the second contact electrode branch portion.

And the second contact electrode branch portion includes a second field induction portion protruding from an edge toward the first contact electrode branch portion.
The electric field driving display device of claim 2, wherein each of the first and second contact battery branches is alternately disposed along the first contact electrode stem and the second contact electrode stem.
The electric field driving display device of claim 6, wherein each of the spaces includes one first contact electrode branch and one second contact electrode branch.
The electric field driving display device of claim 1, wherein each of the spaces includes one first control electrode and one second control electrode.
The electric field driving display device of claim 1, wherein the first contact electrode and the second contact electrode have a mutual potential difference.
The electric field driving display device of claim 1, wherein the driving body has a width in a horizontal direction greater than that of the opening.
The electric field driving display device of claim 1, wherein the driver does not have a permanent charge.
The method of claim 11, wherein the first driving unit comprises: insulating particles made of an insulating polymer material; And a conductive material provided to cover the insulating particles.
The electric field driving display device of claim 1, further comprising a backlight unit configured to supply light toward the first substrate.
The electric field driving display device of claim 13, wherein the first contact electrode and the first control electrode are made of a transparent conductive material.
The electric field driving display device of claim 14, wherein the first driving unit is made of a non-transparent conductive material.
The electric field driving display device of claim 1, further comprising a light blocking layer disposed between the first substrate and the first control electrode and the second control electrode.
The semiconductor device of claim 1, further comprising: a lower alignment layer formed on the first contact electrode and the second contact electrode; And

And an upper alignment layer formed on the blocking member.
The electric field driving display device of claim 17, wherein the lower alignment layer and the upper alignment layer include a vertical alignment layer.