KR101914527B1 - Transmittance-variable Type Display Panel and Method of Manufacturing the Same - Google Patents

Abstract

The present invention relates to a transmittance-variable display panel and a manufacturing method thereof. The transmittance-variable display panel comprises: an upper substrate; a lower substrate; an upper electrode disposed on one surface of the upper substrate; a lower electrode disposed on one surface of the lower substrate; a display layer formed between the upper substrate and the lower substrate; and a conductive control layer formed between the upper electrode and the lower electrode. The display layer includes a binder layer and a microcapsule, wherein the microcapsule includes particles and a fluid.

Description

TECHNICAL FIELD [0001] The present invention relates to a transmissive display panel and a method of manufacturing the same,

The present invention relates to a structure of a panel for improving electrical and optical characteristics during driving, and a manufacturing method thereof, in addition to reduction of manufacturing cost in a transmissivity display using an electrophoretic technique.

1A and 1B are cross-sectional views illustrating a conventional display panel structure.

When the electric field is generated by the voltage applied from the outside to the ink in which the fine particles charged with the fluid are dispersed, the electrophoresis characteristic of moving the particles according to the polarity of the electric charge and the direction of the electric field In the conventional technology, one of the upper and lower substrates is used as a common electrode, while at least two electrodes are used for the upper and lower substrates, The electrode 102 of another substrate 101 may be finely patterned or an insulating layer 208 may be formed on the surface of the electrode 202 with materials such as photoresist selectively as shown in FIG. And an electric field is formed in a specific region when an external rotor voltage is applied.

1A, when a transmissive mode is to be implemented in a conventional display panel structure, a voltage having a polarity opposite to that of a charge of particles 106 is applied to a finely patterned electrode 102 of a lower substrate 101 So that the particles 106 move to the patterned electrode and light from the outside is transmitted through a region other than the region where the particles 106 are concentrated.

Referring to FIG. 1B, in another conventional display panel structure, when the particles 206 form an electric field having a polarity opposite to that of the charges of the charges in the display mode, the insulating layer 208 of the lower electrode 202 is removed The particles 206 move in the region where the electrode 202 is exposed and light from the outside is transmitted through the region of the insulating layer 208 other than the region where the particles 206 are concentrated.

1A and 1B, in a conventional display panel structure, when a shielding mode is to be implemented, when a voltage having a polarity such as a sign of a charge of particles is applied to an electrode of a lower substrate, As the intensity of the voltage increases, the light is moved to the common electrode at the upper portion to absorb the light from the outside, thereby shielding the light.

FIG. 2A is a cross-sectional view illustrating a process sequence for manufacturing a conventional display panel structure according to FIG. 1A.

FIG. 2B is a cross-sectional view illustrating a process sequence for manufacturing another conventional display panel structure according to FIG. 1B.

2A and 2B, in the process of manufacturing a conventional display panel structure, the electrode 102 is patterned (FIG. 2A) using a mask 110 and a photoresist 109 coating finely and precisely, In order to use the mask 210 and optionally to coat the insulating layer 208 such as photoresist (FIG. 2b), fabrication is possible only after complicated processes such as a photolithographic process, and very high performance equipment is essential And there are many restrictions in the manufacturing environment such as disposal materials (cleaning, developing, etching process), and the like.

In addition, in the display panel structure of FIG. 2A, as the width of the electrode 102 is decreased to increase the transmittance, the resistance of the electrode 102 increases, so that the driving voltage may increase or the electrode may burn during driving.

In the display panel structure of FIG. 2B, when the width of the region in which the electrode 202 is exposed in the insulating layer 208 is increased in order to increase the transmittance, the width of the developed region is reduced, PR is required. If impurities are left on the surface of the exposed electrode with a reduced precision, a decrease in transmittance, a high driving voltage, and a shortened lifetime may occur during driving.

As described above, the conventional display panel structures have a limitation in increasing the transmittance and have a problem of increasing the manufacturing cost of the panel.

In the conventional electrophoretic display manufacturing method, partition walls are formed so as to fill the uniform ink on the electrode surface of the upper and lower substrates of the panel in order to prevent uneven distribution of particles when sedimenting and driving the particles in the fluid, UNIT CELL), or a microcapsule-type display layer is formed by microcapsulating an ink in which particles are dispersed in a fluid.

In the case of the cell type display method, a high level of process precision is required in order to align the barrier ribs with patterned electrodes or electrodes in which a specific region is exposed.

In a transmissive display using a conventional electrophoretic display, a microcapsule type display method has not been used until now, and a reflective display using mainly a cell type display is used. The reason why the microcapsule type display method is not applied is as follows.

3A is a plan view showing a conventional microcapsule type display panel structure.

3B and 3C are cross-sectional views illustrating a conventional microcapsule type display panel structure.

The width of the patterned electrode to which the conventional technique is applied is several tens of micrometers and is patterned at intervals of several hundreds of micrometers from each other. In order to form a smaller electrode width, an electric resistance problem, a complicated process, There is a problem that a limitation of

3A, the diameter of the microcapsules 308 is less than several tens of micrometers to several hundreds of micrometers according to the prior art. Since the microcapsules 308 are coated with an irregular arrangement when the display layers are formed, The patterned electrode 302 and the microcapsules 308 are not uniformly aligned.

3b and 3c, when all or a part of the particles in the microcapsules 308, which are in contact with the region of the patterned electrode 302 through the adhesive layer 310, are driven by external voltage application, It can be seen that the particles in the microcapsule 308 corresponding to the outside of the region of the patterned electrode 302 can not move even though the external voltage is applied. That is, in the microcapsule type display panel structure according to the related art, it is impossible to select the efficient transmission mode and the shielding mode.

On the other hand, when the entirety of the microcapsule is in contact with the surface of the patterned electrode, the electric field is formed over the entire microcapsule, so that the particles are moved across the entire upper / lower surface, The microcapsules which are not in contact with the electrodes can not be driven due to the influence of the electric field due to the increase of the resistance due to the variation of wall material thickness of the microcapsule and the influence of the binder between the microcapsules.

If the diameter of the microcapsules is set to be large in order to drive in the manner shown in FIG. 1A or 1B and the occupancy rate of the microcapsules corresponding to the fine patterned electrodes is increased, the gap between the upper and lower electrodes becomes larger, The material cost is increased, and a relatively high driving voltage is required.

In particular, according to the prior art of FIG. 1A, the width of the electrode 102 to be patterned must be narrowed in order to increase the transmittance and increase the variable width of the transmittance.

FIG. 3D is a three-dimensional view of the electrode for explaining the [Expression 1].

The resistance R of the electrode is proportional to the length L of the lead and inversely proportional to the cross-sectional area A, so that the thickness or the width (or the cross-sectional area) of the electrode is the same but the length of the lead becomes longer, When the thickness or the width (or the cross-sectional area) of the electrode is reduced, the movement of the electrons is more disturbed when a voltage is applied from the outside, so that the driving voltage becomes extremely high or the short circuit is caused by the heat generated by the applied voltage I have a problem.

[Equation 1]

resistance:

Specific resistance:

σ = conductivity: voltage V = I (current) * R (resistance)

In addition, when a microcapsule type display method is applied to the prior art of FIG. 1B, since a resistance is increased due to a gap difference between an electrode exposed between a display layer and an insulating layer in panel joining, an electric field is not formed have.

Due to problems such as the lowering of the transmittance, the higher driving voltage, the lowering of the lifetime, the higher the material cost, the microcapsule type display method for realizing the transmissive display is not used.

KR 10-2013-0067460 A (June 03, 2013) KR 10-2013-0078094 A (Jan. 10, 2013) KR 10-2013-0005493 A (Jan. 01, 2014)

It is an object of the present invention to provide a display device which can be applied to both a cell type display panel and a microcapsule type display panel and is capable of simplifying a process, reducing materials and manufacturing costs, improving transparency, And a method of manufacturing the same, and a method of manufacturing the same.

The problems to be solved by the present invention are not limited to the above-mentioned problems, and other problems not mentioned can be clearly understood by those skilled in the art from the following description.

According to an aspect of the present invention, there is provided a transmissive display panel including: an upper substrate; A lower substrate; An upper electrode disposed on one surface of the upper substrate; A lower electrode disposed on one surface of the lower substrate; A display layer formed between the upper substrate and the lower substrate; And a conductive control layer formed between the upper electrode and the lower electrode, wherein the display layer includes barrier ribs disposed between the upper substrate and the lower substrate to define a plurality of unit pixel regions, The regions may include particles and fluids, respectively.

The lower electrodes may be positioned in the conductive control layer in the form of pixel electrodes that are spaced apart from one another.

According to an aspect of the present invention, there is provided a transmissive display panel including: an upper substrate; A lower substrate; An upper electrode disposed on one surface of the upper substrate; A lower electrode disposed on one surface of the lower substrate; A display layer formed between the upper substrate and the lower substrate; And barrier ribs disposed between the upper substrate and the lower substrate and defining a plurality of unit pixel regions, wherein each unit pixel region includes a conductive control layer formed between the upper electrode and the lower electrode, and particles and a fluid .

The transmissive display panel according to an exemplary embodiment of the present invention may further include a sealing layer formed in contact with the conductive control layer.

According to an aspect of the present invention, there is provided a transmissive display panel including: an upper substrate; A lower substrate; An upper electrode disposed on one surface of the upper substrate; A lower electrode disposed on one surface of the lower substrate; A display layer formed between the upper substrate and the lower substrate; And a conductive control layer formed between the upper electrode and the lower electrode, wherein the display layer includes a binder layer and a microcapsule, and the microcapsule may include particles and a fluid.

The transmissive display panel according to an embodiment of the present invention may further include an adhesive layer for attaching the conductive control layer and the display layer.

The transmissive display panel according to an embodiment of the present invention may further include an adhesive layer for attaching the upper electrode or the lower electrode and the conductive control layer.

In the transmissive display panel according to an exemplary embodiment of the present invention, the conductive control layer may further include color dyes or pigments.

In the transmissive display panel according to an exemplary embodiment of the present invention, the lower electrodes may be disposed in the conductive control layer in the form of pixel electrodes spaced apart from each other, and the same or different voltages may be applied to the microcapsules.

According to an aspect of the present invention, there is provided a transmissive display panel including: an upper substrate; A lower substrate; An upper electrode disposed on one surface of the upper substrate; A lower electrode disposed on one surface of the lower substrate; A display layer formed between the upper substrate and the lower substrate; A conductive control layer formed between the upper electrode and the lower electrode; Wherein the display layer comprises a binder layer, a microcapsule, and an adhesive layer, wherein the microcapsules comprise particles and a fluid, wherein a portion of the outer surface of the microcapsules in the display layer is surrounded by a binder layer, May be filled with an adhesive layer.

In the transmissive display panel according to an embodiment of the present invention, the adhesive layer may include an adhesive having elasticity or conductivity.

The conductive control layer may include a base material and a conductive control material.

The base material may include a material used for an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, or a dielectric layer.

The diameter of the conductive control material may be set to be smaller than the width of the unit pixel or smaller than the diameter of the average microcapsule.

The microcapsule may have a spherical shape or a shape of a face body in which the microcapsules are uniformly adhered to the upper and lower electrodes or may be a non-spherical shape capable of minimizing the gap between the microcapsules and the thickness of the display layer. have.

According to an aspect of the present invention, there is provided a method of fabricating a transmissive display panel, including: forming an upper electrode on one surface of an upper substrate; Forming a lower electrode on one surface of the lower substrate; Forming a display layer on one surface of the upper or lower electrode; Forming a conductive control layer on one surface of the upper or lower electrode; And bonding the upper substrate and the lower substrate by attaching the display layer and the conductive control layer.

The forming of the display layer may include forming barrier ribs defining a plurality of unit pixel regions on one surface of the upper or lower electrode; And filling the plurality of unit pixel regions with the particles and the fluid.

The forming of the display layer may include forming barrier ribs defining a plurality of unit pixel regions on one surface of the upper or lower electrode; And filling the plurality of unit pixel regions with the particles and the fluid, filling the plurality of unit pixel regions with the particles and the fluid, and then sealing to form the sealing layer.

The forming of the display layer may include coating the microcapsules containing the particles and the fluid on one surface of the upper or lower electrode by mixing with a binder.

The display layer may be formed by mixing the microcapsules with a binder to coat one surface of the upper or lower electrode, wherein the coating thickness of the microcapsules mixed with the binder is smaller than the average diameter of the microcapsules Exposing a portion of the outer surface to a coating, and then drying or curing to form a binder layer; And forming an adhesive layer by coating an adhesive on the exposed region to be in contact with the binder layer.

The microcapsule may have a non-spherical shape or a face shape by controlling the applied pressure in the coating process of the binder layer or the adhesive layer or in the process of attaching the upper substrate and the lower substrate.

The adhesive layer may include an adhesive or a pressure-sensitive adhesive having elasticity or conductivity.

The upper or lower electrode may be a pixel electrode disposed on one surface of the upper or lower substrate so as to be spaced apart from each other.

The conductive control layer may be prepared by mixing a conductive control material with a base material and then coating the surface of the upper or lower electrode.

The base material may include a material used for an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, or a dielectric layer.

The diameter of the conductive control material may be set to be smaller than the width of the unit pixel or smaller than the diameter of the average microcapsule.

The display panel manufactured according to the method of manufacturing a transmissive-type electrophoretic display panel of the present invention significantly reduces the thickness of the display layer and the intensity of the electric field applied at the same applied voltage (V) The response time is improved, and the driving voltage is also relatively low.

According to the present invention, when a conductive control layer is used to concentrate an electric field in a specific region in order to realize a transmission mode, electrode patterning is not required, and a conductive charge material having a resistance value of nano- It is possible to improve the transmittance without increasing the driving voltage and the wire resistance.

According to the present invention, in order to realize a transmission mode or a shielding mode, the range of electric fields required to concentrate or re-disperse the dispersed particles in a specific region is relatively narrow and therefore the electric field intensity required is low, So that the response time for converting from the transmission mode to the shielding mode can be remarkably reduced.

In addition, in the case of the conventional technique, the intensity of the electric field varies depending on the position of the particles, and the range of the electric field necessary for concentrating the unspecifically dispersed particles into a specific region is wide. As a result, Since the range of the electric field required to concentrate the particles is relatively narrow and the variation of the electric field intensity on the particles is thereby reduced, It is possible to improve the life of the device.

Since there is no need to pattern a separate electrode or develop an insulating layer to manufacture a display panel, the process is simple compared to the prior art, no additional waste or contaminants are generated, , The adhesive layer, the adhesive layer, and the like, it is possible to reduce the manufacturing cost remarkably, and it is advantageous in that it is relatively free from the restriction of the manufacturing environment.

According to the present invention, since the selective resistance adjusting layer or the conductive adjusting layer has a constant flatness and an electric field can be generated in a relatively narrow region compared to the prior art, It can be applied to a display panel of a microcapsule type, which has an advantage that a range of an application product is very wide.

In addition, according to the present invention, when a color dye or pigment is mixed with a conductive or resistance-controlling material in a base material used for constituting the selective resistance adjusting layer or the conductive adjusting layer, both the saturation and the transmittance can be controlled The range of display products which can be applied can be broadened.

In the prior art, if the technique of the present invention is applied to the patterned electrode used for concentrating the particles, it is possible to control the relatively wide range of transmittance without increasing the driving voltage, It is possible to improve not only transmittance but also transmittance control range.

1A and 1B are cross-sectional views illustrating a conventional display panel structure.
FIG. 2A is a cross-sectional view illustrating a process sequence for manufacturing a conventional display panel structure according to FIG. 1A.
FIG. 2B is a cross-sectional view illustrating a process sequence for manufacturing another conventional display panel structure according to FIG. 1B.
3A is a plan view showing a conventional microcapsule type display panel structure.
3B and 3C are cross-sectional views illustrating a conventional microcapsule type display panel structure.
FIG. 3D is a three-dimensional view of the electrode for explaining the [Expression 1].
4 is a cross-sectional view of a cell type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.
5A and 5B are cross-sectional views of a microcapsule type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.
5C is a cross-sectional view of a microcapsule type transmissivity display panel using an electrophoretic principle according to another embodiment of the present invention.
FIG. 6A is a plan view showing a selective resistance control layer or a conductive control layer in a microcapsule type transmissive display panel using the electrophoretic principle according to FIGS. 5A, 5B and 5C. FIG.
FIG. 6B is a plan view showing a selective resistance adjusting layer or a conductive adjusting layer in a microcapsule type transmissive display panel using the electrophoretic principle according to FIGS. 5A, 5B, and 5C.
7 is a schematic cross-sectional view of a panel illustrating a fabrication process of a transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.
8 is a cross-sectional view illustrating a unit pixel type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.
9 and 10 are cross-sectional views illustrating a microcapsule type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.
11 is a cross-sectional view showing a conventional unit pixel type display panel structure.
FIG. 12 is a cross-sectional view illustrating a unit pixel type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention, which is compared with FIG. 11 of the related art.
13A and 13B are cross-sectional views illustrating a microcapsule type transmissivity display panel using an electrophoretic principle according to another embodiment of the present invention.
14A and 14B are cross-sectional views illustrating a microcapsule-type display panel capable of adjusting saturation and transmission using the electrophoresis principle according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention is capable of various modifications and various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. The effects and features of the present invention and methods of achieving them will be apparent with reference to the embodiments described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below, but may be implemented in various forms.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, wherein like reference numerals refer to like or corresponding components throughout the drawings, and a duplicate description thereof will be omitted .

In the following embodiments, the terms first, second, and the like are used for the purpose of distinguishing one element from another element, not the limitative meaning. Also, in the following examples, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In the following embodiments, terms such as inclusive or possessive are intended to mean that a feature, or element, described in the specification is present, and does not preclude the possibility that one or more other features or elements may be added.

4 is a cross-sectional view of a unit pixel type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.

4, the unit pixel type transmissive display panel 400 includes an upper substrate 405, a lower substrate 401, an upper electrode 404, a lower electrode 402, an upper substrate 405, A barrier layer 403 disposed between the upper substrate 405 and the lower substrate 401 and defining a plurality of unit pixels 412, a display layer 411 formed between the upper substrate 405 and the lower substrate 401, Or an optional resistance adjusting layer or a conductive adjusting layer 410 formed on the insulating layer 410.

Each unit pixel 412 region may be filled with particles 406 and fluid 406.

5A and 5B are cross-sectional views of a microcapsule type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.

5A and 5B, the microcapsule type transmissive display panel 500 includes an upper substrate 505, a lower substrate 501, an upper electrode 504, a lower electrode 502, an upper substrate 505, And an optional resistance adjusting layer or a conductive adjusting layer 510 formed on the lower electrode 502 and the display layer 511 formed between the upper substrate 501 and the lower substrate 501.

The display layer 511 may include a binder layer 509 and a microcapsule 508 and the microcapsule 508 may include particles 506 and a fluid 507.

5C is a cross-sectional view of a microcapsule type transmissivity display panel using an electrophoretic principle according to another embodiment of the present invention.

5C, the microcapsule type transmissive display panel 500c includes an upper substrate 505, a lower substrate 501, an upper electrode 504, a lower electrode 502, an upper substrate 505, The display layer 511 may include an optional resistance control layer or a conductive control layer 510 formed on the lower electrode 502. The display layer 511 may include a binder layer 509 and a microcapsule 508. The microcapsules 508 may include particles 506 and fluids 507. The microcapsules 508 may include a plurality of microcapsules 509,

The display layer 511 is formed by mixing a microcapsule 508 with a binder layer 509 to expose a portion of the microcapsules 508 during coating and then applying an adhesive layer The binder layer 509 and the adhesive layer (or the pressure-sensitive adhesive layer) 512 are all located in the display layer 511 with the microcapsules 508 as the center.

5C, the positions of the binder layer 509 and the adhesive layer (or the pressure-sensitive adhesive layer) 512 of the display layer 511 located between the upper substrate 505 and the lower substrate 501 are the same for the purpose of use and display Layer 511 may be changed according to the coating process.

In the manufacturing process of the display layer 511 according to an embodiment of the present invention, the microcapsules 508 are mixed with the binder layer 509 to coat the electrodes of the upper and lower substrates, followed by drying or curing, (511) can be formed.

At this time, the microcapsules 508 can be controlled through controlling the physical properties of the binder layer 509, adjusting the mixing ratio of the microcapsules 508 and the binder layer 509, controlling the thickness of the coating film, coating time, A part of the binder layer 509 is exposed without being surrounded by the binder layer 509 and the binder layer 509 is positioned around the area where the microcapsules 508 are directly in contact with the electrodes of the upper and lower substrates and can be hardened or dried .

An adhesive layer (or a pressure-sensitive adhesive layer) 512 is coated or adhered to the surface of the display layer 511 so that the display layer 511 can be attached to the upper or lower substrate after the formation of the display layer 511. At this time, the physical properties, the formation thickness, and the conductivity of the adhesive layer (or the pressure-sensitive adhesive layer) 512 are adjusted so that the adhesive layer (or the pressure-sensitive adhesive layer) is formed on the gap between the microcapsules 508 and the area exposed without being surrounded by the binder layer 509, ) 512 may be filled.

The elasticity of the microcapsules is enhanced by contacting with the electrodes after attaching the microcapsules of the display layer 511 attached to the substrate regardless of the shapes of the spherical, non-spherical, Durability.

The structure in which both the binder layer and the adhesive layer (or pressure-sensitive adhesive layer) as shown in Fig. 5C are located in the display layer is applicable to both single-layered or multi-layered spherical microcapsules and single- The non-spherical microcapsules in the multilayer can selectively control the shape of the microcapsules by adjusting the pressure applied when the microcapsules are prepared and dried and then attached to the substrate.

In the display panel according to the structure of FIG. 5C, since the thickness of the display layer located between the two electrodes is decreased due to the structure in which both the binder layer and the adhesive layer (or the pressure-sensitive adhesive layer) are located in the display layer, And the driving voltage is reduced in proportion to the applied pressure, so that it can be applied to various applications.

4, 5A, 5B, and 5C, a transmissive display using the electrophoretic principle has a structure in which only a specific region or region between the electrodes of the upper and lower substrates, which does not serve as a common electrode, And has a panel structure in which an optional resistance adjusting layer or a conductive adjusting layer which is set to have a deviation is disposed.

The optional resistance adjusting layer or the conductive adjusting layer may be used by being directly coated or attached to the display layer or electrodes of the upper or lower substrate.

FIG. 6A is a plan view showing a selective resistance control layer or a conductive control layer in a microcapsule type transmissive display panel using the electrophoretic principle according to FIGS. 5A, 5B and 5C. FIG.

The selective resistance control layer or the conductive control layer 510 may be a solid or liquid material that can be melted and may be thermally cured or UV cured at a specific temperature as a base 513 and may be an optional resistor or a high- The conductive adjusting material 514 may be mixed with the base 513 by adjusting the mixing ratio thereof and then coated on the surface of the exposed electrode of the substrate and cured.

The base material 513 is not limited as long as it can function as an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, a dielectric layer, or the like depending on the panel structure applied.

It is preferable to set the diameter of the low resistance or high conductivity material 614 to be smaller than the width of the unit pixel in Fig. 4, or smaller than the diameter of the average microcapsule in Figs. 5A, 5B and 5C.

FIG. 6B is a plan view showing a selective resistance adjusting layer or a conductive adjusting layer in a microcapsule type transmissive display panel using the electrophoretic principle according to FIGS. 5A, 5B, and 5C.

Referring to FIG. 6B, the diameter of the selective resistance or conductive control material 514, which is a low resistance material or a high conductivity material, is equal to or smaller than the diameter of the minimum particles forming the material or the diameter of the average microcapsule 508 . Accordingly, when a region having a high conductivity or a low resistance is formed to have a diameter smaller than the diameter of a microcapsule or a unit pixel and a voltage is applied to the upper and lower electrodes to generate an electric field, a selective resistance adjusting layer or a conductive adjusting layer 510), an electric field is formed only between a region having a relatively low resistance or a region having a high conductivity and a common electrode, thereby selectively focusing the charged particles according to the direction of the electric field, thereby realizing a transmission mode.

Therefore, when the microcapsules 308 are coated to form a display layer, the microcapsules 308 and the microcapsules 308 are coated in an irregular arrangement as compared with the prior art FIGS. 3A, 3B and 3C. The particles in the microcapsule 308 corresponding to the portion outside the patterned electrode 302 region can not move in spite of the application of an external voltage. As a result, in the microcapsule type display panel structure, The shielding mode can not be selected. On the other hand, when the technique using the selective resistance adjusting layer or the conductive adjusting layer of the present invention is applied, it becomes possible to manufacture a transmissive display panel in an electrophoretic display using microcapsules.

7 is a schematic cross-sectional view of a panel illustrating a fabrication process of a transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.

Referring to FIG. 7, a process of disposing a selective resistance control layer or a conductive control layer 710 on the electrodes of the upper or lower substrate, may be used as an ink sealing layer, an adhesive layer, an adhesive layer, A material which is thermally cured or UV cured under a specific temperature as a fusible solid or liquid material which can be used as a base 713 and which is provided with an optional resistor or a conductive control material 714) may be mixed by adjusting the mixing ratio and then coated on the surface of the exposed electrode of the substrate and cured.

The substrate 701 having the selective resistance control layer or the conductive control layer 710 formed thereon as described above is attached to a unit pixel type or microcapsule type display layer formed on the upper or lower substrate to manufacture a display panel.

2A and 2B, it is possible to produce a display panel with a relatively simple process and a low manufacturing cost. In the photolithography process for the present process, the cleaning equipment, the exposure equipment, the development and etching Expensive photolithographic processing equipments such as equipment are not needed, and processes such as cleaning, development, and etching are omitted, so that process-related materials are unnecessary and waste caused by the process is not generated.

8 is a cross-sectional view illustrating a unit pixel type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.

8, the unit cell type transmissive display panel 800 includes an upper substrate 805, a lower substrate 801, an upper electrode 804, a lower electrode 802, an upper substrate 805, A partition wall 803 disposed between the upper substrate 801 and the lower substrate 801 and defining a plurality of unit pixels 812 and a display layer 811 formed between the upper substrate 805 and the lower substrate 801, The conductive layer 812 includes an optional resistance adjusting layer or conductive adjusting layer 810 formed on the lower electrode 802 and a sealing layer 815 formed on the selective resistance adjusting layer or conductive adjusting layer 810 can do.

The selective resistance control layer or conductive control layer 810 is attached to the surface of the sealing layer 815 when the display layer 811 is formed by filling and sealing the particles 806 and the fluid 807 in the unit pixel 812 Can be located.

Each unit pixel 812 region may be filled with particles 806 and fluid 806.

As another example, depending on the panel manufacturing method and the application to which it is applied, the optional resistance adjusting layer or conductive adjusting layer 810 may be directly bonded to the surface of the display layer 811, It can serve as a regulating layer and a sealing layer.

9 and 10 are cross-sectional views illustrating a microcapsule type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention.

9, the microcapsule type transmissive display panel 900 includes an upper substrate 905, a lower substrate 901, an upper electrode 904, a lower electrode 902, an upper substrate 905, A selective resistance adjusting layer or a conductive adjusting layer 910 formed on the lower electrode 902 and the selective resistance adjusting layer or conductive adjusting layer 910 and a display layer 911 formed between the selective resistance adjusting layer or the conductive adjusting layer 910, (Or a pressure-sensitive adhesive layer) 912 for adhering the layer 911 to the substrate.

9, an optional resistance adjusting layer or conductive adjusting layer 910 may be positioned below the adhesive layer 912 and an optional resistance adjusting layer or conductive adjusting layer 1010 may be disposed on the adhesive layer 1012 may be directly attached to the display layers 911 and 1011 to form an adhesive layer or adhesive layer 1011. In another embodiment, Layer) at the same time.

11 is a cross-sectional view showing a conventional unit pixel type display panel structure.

FIG. 12 is a cross-sectional view illustrating a unit pixel type transmissivity display panel using an electrophoretic principle according to an embodiment of the present invention, which is compared with FIG. 11 of the related art. And the pixel electrodes 1202 are disposed apart from each other in the selective resistance adjusting layer or the conductive adjusting layer 1210. [

11 and 12, when the selective resistance control layer or the conductive control layer 1210 of FIG. 12 is used to concentrate the electric field in a specific region to realize the transmission mode, The electrode patterning is not required, and the conductive or regulating material 1214 having the resistance value of nano-micrometer unit is mixed. Therefore, the transmittance can be improved without increasing the driving voltage and the wire resistance.

According to the invention of Figure 12, the range of electric fields required to focus or redistribute the dispersed particles 1206 in a particular region to implement the transmission mode or shielded mode is relatively narrower than in the prior art Figure 11, The driving voltage is lowered due to the low intensity of the electric field required. Thus, the response time for switching from the transmission mode to the shielding mode can be remarkably reduced.

11, the electric field intensity varies depending on the position of the particles 1106, and the electric field necessary for concentrating the unspecifically dispersed particles 1106 in a specific region is wide, The particles 1106 exposed to a region of relatively high electric field intensity have a problem of deterioration in the lifetime, whereas according to the present invention of Fig. 12, the range of the electric field required to concentrate the particles 1206 is relatively And the variation of the electric field intensity on the particles 1206 is reduced, so that the lifetime of the panel can be improved.

12, a plurality of gate lines and a plurality of data lines are formed on the lower substrate 1201 so as to cross each other, although not shown in the drawing. A plurality of unit pixels 1212 are defined by the intersection of the plurality of gate lines and the plurality of data lines. A thin film transistor (hereinafter referred to as TFT) is formed as a switching element for each unit pixel 1212, and a pixel electrode 1202 whose current is controlled through the TFT is formed.

The gate line and the data line may be formed of a single film made of silver (Ag), aluminum (Al), or an alloy thereof having a low resistivity. The gate line and the data line may be formed of a multilayer film further including a film made of chromium (Cr), titanium (Ti), tantalum (Ta), molybdenum (Mo), molybdenum titanium (MoTi) .

The gate electrode of the TFT is connected to the gate line, the source electrode is connected to the data line, and the drain electrode is connected to the pixel electrode 1202. A pixel electrode 1202 is formed for each unit pixel 1212, and a data voltage is applied to the pixel electrode 1202 by switching of the TFT.

The pixel electrode 1202 is usually made of a conductive metal layer, and both a transparent or opaque metal layer is possible. Since the apparatus including the electrophoretic display panel of the present invention reflects an external light source and is recognized by a person, an opaque metal thin film having excellent reflection characteristics can be used as the pixel electrode 1202.

The pixel electrode 1202 may be formed of a material such as copper, aluminum, or indium tin oxide (ITO). Meanwhile, the pixel electrode 1202 may be formed by further depositing nickel, gold, or the like on the material of copper, aluminum, and indium tin oxide (ITO).

13A and 13B are cross-sectional views illustrating a microcapsule type transmissivity display panel using an electrophoretic principle according to another embodiment of the present invention.

9A and 13B, a display layer 1311 disposed in contact with an upper electrode 1304 formed on a lower surface of the upper substrate 1305 is formed on a lower substrate (not shown) (Or pressure-sensitive adhesive layer) separate from the optional resistance control layer or conductive control layer 1310 formed on the surface of the lower electrode 1302 patterned on the substrate 1301 .

The patterned lower electrode 1302 may apply the same or different voltages to the plurality of microcapsules 1308 or a plurality of microcapsules 1308 exhibiting different colors.

That is, the lower electrode 1302 has a patterned structure in which a lower electrode 1302 is disposed in a selective resistance adjusting layer or a conductive adjusting layer 1310, and when compared with the prior art panel of FIG. 3B, The particles 1306 in the microcapsules 1308 that are in contact with areas of the highly conductive material 1314 due to selective resistance or conductive control material 1314 that is low in resistance or a high conductivity material in the layer or conductive control layer 1310 ) Is relatively narrow and thus the variation of the field strength on the particles 1306 is reduced so that a relatively wide range of transmittance can be obtained without increasing the conventional resistance or drive voltage It has the advantage of being able to control.

14A and 14B are cross-sectional views illustrating a microcapsule-type display panel capable of adjusting saturation and transmission using the electrophoresis principle according to an embodiment of the present invention.

14A and 14B, a color dye or pigment 1415 is formed on a base material 1403 used to construct an optional resistance control layer or conductive control layer 1410, in addition to a resistance or conductivity control material 1404. [ It is possible to control both the saturation and the transmittance in the transmission mode, thereby widening the range of the display product which can be applied.

The materials used in the manufacturing process and the process applied to the specific embodiment of the present invention according to Figs. 5 to 14 are as follows.

In the transmissive display panel using the electrophoretic principle, the upper electrode disposed at the lower portion of the upper substrate has a certain transmittance and can be used as a common electrode that is not patterned normally. At this time, the lower electrode disposed on the lower substrate may have a patterned pattern of a non-patterned common electrode or a plurality of independent electrodes in order to control a pixel with a resolution of a display and an independent electrical signal.

In order to drive an apparatus including the electrophoretic display panel, an electric field must be formed between the upper electrode and the lower electrode, and the color and contrast ratio implemented from the display unit of the apparatus changes depending on the intensity and direction of the applied electric field. For this reason, in the conventional manufacturing process, the electrophoretic display layer is mainly formed on the upper substrate, but in the present invention, the electrophoretic display layer may be formed on the upper substrate or the lower substrate depending on the use purpose.

The upper substrate is a transparent transparent material having a high transmittance, and may be a base film formed of a material having a high transmittance of 80% or more. The upper substrate is a transparent polymer film having excellent light transmittance. The upper substrate is made of polyether sulfone (PES), polyacrylate (PAR), polyetherimide (PEI), polyethyelenene naphthalate (PEN) It can be formed of polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose triacetate (TAC) But is not limited thereto.

An upper electrode may be provided on one surface of the upper substrate facing the lower substrate. The upper electrode may apply the same voltage to the plurality of display layers. The upper electrode may be a common electrode formed in a plate shape so as to be common to a plurality of display layers. The upper electrode 202 may be formed on the viewer side and may be formed of a transparent conductive oxide such as ITO (indium tin oxide), IZO (indium zinc oxide), IZTO (indium zinc tin oxide), AZO ) May be formed of a transparent conductive material.

The particles can be charged with (+) polarity or (-) polarity and can have various colors. The particles can be organic or inorganic compounds and can absorb light or reflect (or scatter) light. The particles can be reflective materials such as metal particles. The particles can be colored particles.

The particles may include two or more kinds of particles having different polarities, and the color of the particles may be different.

The fluid may be water, methanol, ethanol, propanol, butanol, propylene carbonate, toluene, benzene, hexane, chloroform Isopropyl myristate, tocophenol acetate, and the like can be used in combination with an organic solvent such as chloroform, isoparaffin oil, silicone oil, ester oil, hydrocarbon-based oil trihexanone, dimethicone, cetyloctanoate, dicaprylate, ≪ / RTI > The fluid may include a fluorescent material, a phosphorescent material, a light emitting material, or the like, or may include a color-changing material (for example, a sion pigment material, a sion dye material, etc.) whose color characteristic changes as energy is applied.

The microcapsules may be fixed at predetermined intervals in the binder layer or in the binder layer and the adhesive layer (or the pressure-sensitive adhesive layer) so that a spacing space may be formed between the microcapsules. By the spacing space, each microcapsule does not directly contact neighboring microcapsules. The outer surface of each microcapsule may be surrounded by a binder layer or a binder layer and an adhesive layer (or a pressure-sensitive adhesive layer).

The binder layer may comprise an at least partially transparent material in the visible region of 380 nm to 750 nm. The binder layer may include at least one transparent polymeric material selected from the group consisting of an acrylic polymer, a silicone polymer, an ester polymer, a urethane polymer, an amide polymer, an ether polymer, a fluorine polymer, and rubber. Further, the binder layer may include a fluorescent material, a phosphorescent material, a light emitting material, or the like (for example, a sion pigment material, a sion dye material, etc.) whose color characteristics change as energy is applied.

The display layer can be bonded to the lower electrode and the lower substrate through a binder layer or an adhesive layer (or a pressure-sensitive adhesive layer).

The adhesive layer (or pressure sensitive adhesive layer) may be formed using Pressure Sensitive Adhesive (PSA). The pressure-sensitive adhesive can use a material that does not require a change in the optical properties of the constituent members and does not require a high-temperature process during curing and drying at the time of adhesion treatment.

For example, an appropriate polymer such as an acrylic polymer, a silicone polymer, a polyester, a polyurethane, a polyether, or a synthetic rubber may be used as the adhesive layer (or the pressure-sensitive adhesive layer).

The adhesive layer (or pressure-sensitive adhesive layer) may be not only a simple adhesive (or adhesive) action, but also a high-elasticity silicone rubber which also serves as a cushion for relieving the impact.

The adhesive layer (or the pressure-sensitive adhesive layer) may be cured by energy (for example, heat or UV, etc.) or may be uncured.

The lower substrate may be a substrate made of various materials such as plastic and metal. For example, the adhesive layer (or the pressure-sensitive adhesive layer) may be an insulating organic material, such as a polyether sulfone (PES), a polyacrylate (PAR), a polyetherimide (PEI), a polyetherimide PEN, polyethyelenen napthalate, polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate (PC), cellulose triacetate ), But the present invention is not limited thereto. As another example, the lower substrate may include a metal foil containing a metal such as silver, aluminum, or a plastic film whose back surface is coated with a metal layer.

The lower substrate may be a flexible material substrate that may be bent, curved or curled, in which case the lower substrate may be a flexile printed circuit board. However, the present invention is not limited thereto, and the lower substrate may be made of a phenol-based or epoxy-based synthetic resin, and the lower substrate may be a rigid printed circuit board.

A lower electrode may be provided on one surface of the lower substrate.

The lower electrode may apply the same or different voltages to the plurality of microcapsules.

The lower electrode may be formed of a single layer structure of copper, aluminum, indium tin oxide (ITO) or indium zinc oxide (IZO) or a layer of nickel, gold or the like in a material of copper, aluminum, ITO or IZO Layer structure.

The microcapsules may be either soft capsules or hard capsules and may be prepared by in-situ polymerization, coacervation approach or interfacial polymerization.

In the production of microcapsules, a polar or nonpolar dispersion medium may be used as the fluid. For example, isopar-G, which is a kind of oil, methanol, ethanol, propanol, butanol, propylene carbonate, toluene, benzene, chloroform, hexane, cyclohexane, dodecane, perchlorethylene, trichlorethylene, isopar -M, and isopar-H can be used.

Dyestuffs or pigments may be added to the fluid. The base material 1403 used to construct the conductive control layer 1410 of FIGS. 14A and 14B may also include color dyes or pigments 1415 with a resist or conductive control material 1404.

Examples of the dyes or pigments include azo dyes, anthraquinone dyes, carbonium dyes, indigo dyes, sulfide dyes, and phthalocyanine dyes. Titanium dioxide, zinc oxide, Lithopon, Zinc sulfonate, Carbon black, Graphite, Chrome yellow, Zinc chromate, Redoxide of iron, Red lead, , Cardmium red, Molybdate chrome orange, Milori blue, pressian blue, iron blue, Cobalt blue, chrome green, Viridian, zinc An inorganic pigments such as zinc green, aluminium powder, bronze powder, fluorescent pigment and pearl pigment, or an inorganic pigments such as insoluble azo pigments, soluble azo pigments, phthalocyanine pigments, quinacridone pigments, Nontoxic, tint dye systems, phyllocholine systems, fluorine systems, quinophthalone systems, metal complexes Organic pigments such as polyvinyl alcohol and the like can be used.

According to in-situ polymerization, microcapsules can be prepared through a reaction process in which an emulsion is formed and structured into a core-shell form.

First, the particles are dispersed in a fluid to prepare a core material. At this time, the particles may be dispersed in a proportion of 0.1 to 25% by weight with respect to the fluid, but may be dispersed in a larger amount if necessary. The dispersion of the core material may be dispersed using an ultrasonic disperser or a homogenizer.

Next, the prepolymer is prepared by adjusting the acidity by mixing the polymer forming the shell of the microcapsule. This process can be carried out simultaneously with the process for producing the dispersion of the core material.

The polymer for forming the shell may be a polymer precursor that exhibits low elasticity and rigidity, and may be a copolymer such as urea-formaldehyde, melamine-formaldehyde, methylvinylether, maleic anhydride, gelatin, polyvinyl It is possible to use polymers such as alcohols, polyvinyl acetates, cellulose derivatives, acacia, carrageenan, carboxymethyllellulose, hydrolyzed styrene anhydride copolymer, agar, alginate, casein, albumin and cellulose phthalate. And controlling the hydrophobicity to form a shell surrounding the core material. In addition, the prepolymer may be dispersed in a fluid as well as the particles to be produced as a dispersion.

And a step of mixing and stirring the dispersion of the prepared core material with the prepolymer dispersion of the shell material to form an emulsion. As a condition for forming such an emulsion, it is necessary to optimize the ratio of the particles and the prepolymer, and the two dispersions may be mixed in a volume ratio of 1: 5 to 1:12. Further, a stabilizer may be added to improve dispersibility. In the emulsion, the particles become dispersed and the shell material can be a continuous phase.

At this time, an additive may be added to enhance the stability of the emulsion. Such an additive may be an organic polymer having high viscosity and high wettability after dissolution in an aqueous phase. Specific examples thereof include gelatin, polyvinyl alcohol, sodium carboxymethylcellulose, starch, hydroxyethylcellulose, polyvinylpyrrolidone, alginate May be used.

The pH and temperature of the formed emulsion can be adjusted so that the continuous shell material dispersion is deposited around the dispersed particles to form a shell of microcapsules, whereby the core material dispersion can be microencapsulated.

In this case, it may include the step of adding the additive to increase the hardness of the shell by making the microcapsule shell more densely and reducing the elasticity. The type of additive to be added may be an ionic or polar material that is soluble in the aqueous phase. For example, at least one of curing catalysts such as ammonium chloride, resorcinol, hydroquinone, and catechol can be used.

In the case of the coacervation method, an inner phase and an outer phase / oil phase emulsion can be used. The dispersion of the core material is coagulated (bulked) out of the aqueous external phase and controlled by temperature, pH, relative concentration, etc., to form a shell in the internal oily liquid droplet.

In the case of core-shelling, urea-formaldehyde, melamine-formaldehyde, gelatin or arabic rubbers can be used as the shell material.

In the case of the interfacial polymerization method, the lipophilic monomer in the internal phase is present as an emulsion in the aqueous external phase. The monomer in the internal liquid crystal reacts with the monomer introduced into the aqueous external phase, and a polymerization reaction takes place at the interface between the internal liquid phase and the surrounding aqueous external phase, and a shell of particles is formed around the liquid phase. The formed shell is relatively thin and permeable, but unlike other manufacturing methods, it does not require heating and thus has the advantage of applying various dielectric fluids.

The electrophoretic display panel according to the embodiment of the present invention is characterized in that the microcapsules of the display layer adhered to the substrate are strengthened in elasticity of the microcapsules in contact with the electrodes after adhesion regardless of shapes such as spherical, It has durability to absorb pressure or shock.

In the unit pixel type display panel, the barrier rib and the sealing layer may be formed of a non-polar organic or non-polar inorganic material.

The barrier ribs may be formed through photolithography or a mold printing process so as to have a constant height and width (for example, a height of 10um to 100um and a width of 10um to 20um).

It is preferable that the barrier rib is made of a material which is not charged so that the charged particles and the barrier rib are not coupled to each other by an electric force during driving. In the embodiment of the present invention, when a fluid in which charged particles are mixed is a non-polar organic solvent, it may be formed of a polymeric material, an organic material, or an inorganic material having the same physical properties as a fluid, have.

The structure in which both the binder layer and the adhesive layer (or the pressure-sensitive adhesive layer) are located in the display layer according to the embodiment of the present invention is applicable to both single-layered or multilayered spherical microcapsules and single-layered or multilayered non- .

In an electrophoretic display, the positional shift of charged particles that are dispersed in the fluid is determined by the intensity (E = V / d) and direction of the electric field generated by the externally applied voltage between the upper and lower electrodes . The thickness d of the display layer formed between the upper and lower electrodes greatly affects the driving voltage and the response time of the electrophoretic display.

5C, since the binder layer and the adhesive layer (or the pressure-sensitive adhesive layer) are both present in the display layer, the display panel according to the structure of the present invention is different from the panel structure in which the conventional adhesive layer (or the pressure-sensitive adhesive layer) exists separately and the display layer consists only of the binder layer The gap between the upper and lower electrodes can be significantly reduced.

Therefore, according to the present invention, since the intensity of the electric field applied at the same applied voltage (V) is relatively larger than that of the prior art, the operating speed of the particles is increased and the response time can be improved and the driving voltage can be relatively lowered I have.

According to the present invention, the elasticity of the microcapsule region exposed from the binder layer is maintained even after the formation of the display layer, thereby enhancing the durability of buffering a relatively larger impact as compared with the prior art.

In addition, when an adhesive or an adhesive having elasticity such as polyurethane is used, unlike the prior art, since the adhesive or the adhesive encapsulates the microcapsule, direct impact can be alleviated, and durability can be further improved.

The base material included in the optional resistance control layer or the conductive control layer can be used without limitation as long as it can function as an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, a dielectric layer, .

In the case of the unit pixel type of the present invention, in the process in which the unit pixels are filled with a fluid and sealed with a sealing layer, the sealing composition used in the sealing layer is not mixed with the thermoplastic elastomer and the fluid, Solvent or solvent mixture.

The thermoplastic elastomer contained in the sealing composition may be selected from the group consisting of poly (styrene-b-butadiene), poly (styrene-b-butadiene-b-styrene) B-styrene), poly (styrene-b-dimethylsiloxane-b-styrene), poly (? -Methylstyrene-b-isoprene) ? -methylstyrene), poly (? -methylstyrene-b-propylene sulfide-b-? -methylstyrene), poly (? -methylstyrene-b-dimethylsiloxane-b- (Ethylene-co-propylene-co-5-methylene-2-norbornene), an ethylene-propylene-diene terpolymer and graft copolymers or derivatives thereof selected from the group consisting of May be selected from the group consisting of

The sealing composition may further comprise one or more of a crosslinking agent, a vulcanizing agent, a multifunctional monomer or oligomer, a thermal initiator, or a photoinitiator.

An adhesive layer may be used as the base material included in the optional resistance adjusting layer or the conductive adjusting layer.

The adhesive composition used in the adhesive layer may comprise a high dielectric polymer or oligomer and a radiation curable composition.

The high dielectric polymer or oligomer is selected from the group consisting of polyurethane, hydroxyl terminated polyester polyurethane, polyurea, polycarbonate, polyamide, polyester, polycaprolactone, polyvinyl alcohol, polyether, polyvinyl acetate Polyvinyl pyrrolidone, poly (2-ethyl-2-oxazoline), acrylic or methacrylic copolymer, maleic anhydride copolymer, polyvinyl fluoride, polyvinylidene fluoride, , Vinyl ether copolymers, styrene copolymers, diene copolymers, siloxane copolymers, cellulose derivatives, gum arabic, alginates, lecithin, polymers derived from amino acids, and mixtures thereof.

The optional resistance control layer or conductive control layer may include semiconductive or anisotropically conductive materials. That is, conductive beads such as carbon particles, gold particles, aluminum particles, platinum particles, silver particles, plated polymer spheres, plated glass spheres or ITO particles can be used singly or in combination, Conductive beads, such as polyacetylene, polyaniline, polypyrrole, P-DOT, or polythiophene, which are polymers, may be used singly or in combination.

An optional resistance control layer or conductive control layer can be implemented by increasing the conductivity by ion doping salts and other materials as a resistance or a conductivity control material to the adhesive layer. The quaternary ammonium carboxylate polymer can be prepared by neutralizing the carboxylic acid functional group on the polyurethane using a quaternary ammonium hydroxide as the ion doping material. Examples of the quaternary ammonium salt include poly (N-methyl or benzyl (vinylpyridinium)), poly (N-alkyl (or alkaryl) -N'- vinylimidazolium), and poly (beta -trimethylammonioethyl) Acrylate or methacrylate) salt and the like can be used.

Claims (26)

An upper substrate;
A lower substrate;
An upper electrode disposed on one surface of the upper substrate;
A lower electrode disposed on one surface of the lower substrate;
A display layer formed between the upper substrate and the lower substrate; And
And a conductive control layer formed between the upper electrode and the lower electrode,
Wherein the display layer includes barrier ribs disposed between the upper substrate and the lower substrate to define a plurality of unit pixel regions,
Wherein the unit pixel regions each include particles and a fluid,
Wherein the conductive control layer is formed as a single layer,
Wherein the conductive control layer comprises a base material and a conductive control material,
Wherein the conductive control layer further comprises a color dye or pigment,
Wherein a separate adhesive layer and an insulating layer which are in contact with the conductive control layer are not formed.
The method according to claim 1,
Wherein the lower electrode is positioned within the conductive control layer in the form of a pixel electrode disposed apart from each other.
delete delete An upper substrate;
A lower substrate;
An upper electrode disposed on one surface of the upper substrate;
A lower electrode disposed on one surface of the lower substrate;
A display layer formed between the upper substrate and the lower substrate; And
And a conductive control layer formed between the upper electrode and the lower electrode,
Wherein the display layer comprises a binder layer and microcapsules,
Wherein the microcapsule comprises particles and a fluid,
Wherein the conductive control layer is formed as a single layer,
Wherein the conductive control layer comprises a base material and a conductive control material,
Wherein the conductive control layer further comprises a color dye or pigment,
Wherein a separate adhesive layer and an insulating layer which are in contact with the conductive control layer are not formed.
delete delete delete 6. The method of claim 5,
Wherein the lower electrode is positioned within the conductive control layer in the form of a pixel electrode arranged to be spaced apart from each other, and the same or different voltage is applied to the microcapsules.
An upper substrate;
A lower substrate;
An upper electrode disposed on one surface of the upper substrate;
A lower electrode disposed on one surface of the lower substrate;
A display layer formed between the upper substrate and the lower substrate;
A conductive control layer formed between the upper electrode and the lower electrode; And
Wherein the display layer includes a binder layer, a microcapsule, and an adhesive layer,
Wherein the microcapsule comprises particles and a fluid,
Wherein a part of the outer surface of the microcapsules in the display layer is surrounded by a binder layer and the remaining area is filled with an adhesive layer,
Wherein the conductive control layer is formed as a single layer,
Wherein the conductive control layer comprises a base material and a conductive control material,
Wherein the conductive control layer further comprises a color dye or pigment,
Wherein a separate adhesive layer and an insulating layer which are in contact with the conductive control layer are not formed.
11. The method of claim 10,
Wherein the adhesive layer comprises an adhesive having elasticity or conductivity.
delete The method according to any one of claims 1, 2, 5, 9, and 10,
Wherein the base material includes a material used for an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, or a dielectric layer.
The method according to any one of claims 1, 2, 5, 9, and 10,
Wherein the diameter of the conductive control material is set to be smaller than the width of the unit pixel or smaller than the diameter of the average microcapsule.
11. The method according to any one of claims 5, 9 and 10,
The microcapsules may contain,
Spherical,
The microcapsules may have a shape of a face body uniformly adhered to the upper and lower electrodes,
Wherein the gap between the microcapsules and the thickness of the display layer is minimized.
Forming an upper electrode on one surface of the upper substrate;
Forming a lower electrode on one surface of the lower substrate;
Forming a display layer on one surface of the upper or lower electrode;
Forming a conductive control layer on one surface of the upper or lower electrode; And
And bonding the upper substrate and the lower substrate by attaching the display layer and the conductive control layer,
Wherein the conductive control layer is formed as a single layer,
Wherein the conductive control layer comprises a base material and a conductive control material,
Wherein the conductive control layer further comprises a color dye or pigment,
Wherein a separate adhesive layer and an insulating layer which are in contact with the conductive control layer are not formed.
17. The method of claim 16,
The forming of the display layer may include forming barrier ribs defining a plurality of unit pixel regions on one surface of the upper or lower electrode; And
And filling the plurality of unit pixel regions with the particles and the fluid.
delete 17. The method of claim 16,
Wherein the forming of the display layer comprises coating the microcapsules containing the particles and the fluid on one surface of the upper or lower electrode by mixing the microcapsules with a binder.
17. The method of claim 16,
The display layer may be formed by mixing the microcapsules with a binder to coat one surface of the upper or lower electrode, wherein the coating thickness of the microcapsules mixed with the binder is smaller than the average diameter of the microcapsules Exposing a portion of the outer surface to a coating, and then drying or curing to form a binder layer; And
And forming an adhesive layer by coating an adhesive on the exposed area so as to be in contact with the binder layer.
21. The method of claim 20,
The microcapsules may contain,
Wherein the pressure applied at the step of coating the binder layer or the adhesive layer or the step of attaching the upper substrate and the lower substrate is adjusted to have a shape of a non-spherical or a face-shaped body .
22. The method according to claim 20 or 21,
Wherein the adhesive layer comprises an adhesive or a pressure-sensitive adhesive having elasticity or conductivity.
17. The method of claim 16,
Wherein the upper or lower electrode is a pixel electrode disposed on one surface of the upper or lower substrate so as to be spaced apart from each other.
The method according to any one of claims 16 to 17, 19 to 21, and 23,
Wherein the conductive control layer is manufactured by mixing a conductive control material with a base material and then coating the conductive control material on the surface of the upper or lower electrode.
25. The method of claim 24,
Wherein the base material includes a material used for an ink sealing layer, an adhesive layer, an adhesive layer, an insulating layer, or a dielectric layer.
25. The method of claim 24,
Wherein a diameter of the conductive control material is set to be smaller than a width of a unit pixel or smaller than a diameter of an average microcapsule.

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