KR20120140020A - Method for manufacturing electrophoretic display device - Google Patents

Abstract

PURPOSE: A method for manufacturing an electrophoresis display device is provided to completely shield a displaying region by attaching a lower plate to an upper plate by using a sealing layer. CONSTITUTION: A partition(130) and a pixel electrode(120) are formed in a lower substrate. Electrophoresis dispersing liquid is filled in a pixel region. The electrophoresis dispersing liquid includes charged particles(140) and first solvent. Filled first solvent is volatilized by using a drying process. After a base substrate(110) is overturned, second solvent(150) of a container(340) is filled in pixel regions. The upper part of the partition and the electrophoresis dispersing liquid are sealed by using a sealing layer. An upper substrate is attached to the lower plate.

Description

Manufacturing method of electrophoretic display device {METHOD FOR MANUFACTURING ELECTROPHORETIC DISPLAY DEVICE}

The present invention relates to an electrophoretic display device, and more particularly, to a manufacturing method of an electrophoretic display device capable of improving manufacturing efficiency and driving reliability.

The electrophoretic display device refers to a device for displaying an image by using electrophoresis phenomenon in which colored charged particles move by an electric field applied from the outside. Here, the electrophoretic phenomenon refers to a phenomenon in which the charged particles move in the liquid by the Coulomb force when an electric field is applied to the electrophoretic dispersion (e-ink) in which the charged particles are dispersed in the liquid.

The electrophoretic display using the electrophoretic phenomenon has a feature of bistable, and even if the applied voltage is removed, the original image can be displayed for a long time. In other words, the electrophoretic display is a display device suitable for the field of e-books in which a constant screen can be maintained for a long time without applying a voltage continuously, and thus a quick replacement of the screen is not required.

In addition, unlike a liquid crystal display, the electrophoretic display device does not have a dependency on a viewing angle, and may provide a comfortable image to the eye to a degree similar to paper. In addition, demand has increased due to the advantages of flexibility, low power consumption, and eco-like flexibility.

1 is a cross-sectional view showing the structure of an electrophoretic display device according to the prior art.

Referring to FIG. 1, an electrophoretic display device according to the related art includes an electrophoretic film interposed between an oppositely bonded lower substrate 10 and an upper substrate 20, and between the lower substrate 10 and the upper substrate 20. (30).

The lower substrate 10 includes a plurality of pixel electrodes (not shown) facing the common electrode 22 formed on the upper substrate 20 and a plurality of thin film transistors that are switching elements for applying a voltage to the plurality of pixel electrodes. TFT, not shown).

The electrophoretic film 30 has a plurality of microcapsules 32 composed of charged particles and a solvent, and an adhesive layer 34 for protecting the microcapsules 32 and adhesion to the lower substrate 10. Layer).

On the other hand, the upper substrate 20, the common electrode 22 and the electrophoretic film 30 may be integrated.

Here, the microcapsules 32 include charged particles charged with positive (+) and charged particles charged with negative (−), and a solvent surrounding the charged particles.

When an electric field is formed between the pixel electrode of the lower substrate 10 and the common electrode 22 of the upper substrate 20, the charged particles included in the microcapsule 32 move by electrophoresis to realize an image. do.

The electrophoretic film 30 is stored and transported with a release film (not shown) attached to the protective layer 34, and the release film is removed immediately before being laminated to the lower substrate 10. The protective layer 34 is attached to the lower substrate 10 by this.

The electrophoretic display device according to the related art manufactures the upper substrate 20, the lower substrate 10, and the lamination electrophoretic film 30, respectively, and then uses the electrophoretic film 30 on the lower substrate 10. And interposed between the upper substrate 20 and the upper substrate 20.

Therefore, since the lower substrate 10, the upper substrate 20, and the electrophoretic film 30 must be manufactured separately, the manufacturing process is complicated, and the manufacturing time is long, and thus the manufacturing efficiency is lowered. In addition, there is a problem that the manufacturing cost is increased by applying the electrophoretic film 30 manufactured separately.

In order to improve such a problem, a technique of internalizing the electrophoretic layer on the lower substrate has been proposed, but various problems are generated because the manufacturing process technology of internalizing the electrophoretic layer on the lower substrate is difficult to apply. There is this.

In particular, due to the filling time of the electrophoretic dispersion consisting of the charged particles and the solvent in the manufacturing process and the waiting time of the process in the bonding of the upper substrate and the lower substrate, the solvent is volatilized, causing the charged particles not to operate normally.

When the electrophoretic display displays a full color image, there is a problem in that charged particles colored with a specific color cannot overflow the pixels of neighboring different colors to display a color image.

In order to fill the cell with electrophoretic dispersions in order to achieve full color, the electrophoretic dispersions initially charged and the electrophoretic dispersions charged at the end are different in volatilization, and thus the driving performance is different for each pixel. There is a problem that occurs.

As a result, when each pixel is not normally driven, and a large amount of electrophoretic dispersion is volatilized, a serious problem occurs that the pixel cannot be driven. Due to the above-described problems, there are problems in that display quality of the electrophoretic display device is lowered, and manufacturing efficiency and driving reliability are lowered.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a method of manufacturing an electrophoretic display device capable of improving manufacturing efficiency of an electrophoretic display device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a method for manufacturing an electrophoretic display device capable of improving mass productivity and driving reliability.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above problems, and to provide a method of manufacturing an electrophoretic display device capable of preventing unfilling or overfilling of an electrophoretic dispersion during a manufacturing process of internalizing the electrophoretic dispersion on a lower substrate. It is a task.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a method of manufacturing an electrophoretic display device capable of shortening the filling time of an electrophoretic dispersion liquid during a manufacturing process of internalizing the electrophoretic dispersion liquid on a lower substrate. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and to provide a method of manufacturing an electrophoretic display device which can prevent the electrophoretic dispersion from overflowing to the upper part of the partition wall during the manufacturing process of internalizing the electrophoretic dispersion on the lower substrate. It is a technical problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and a technical problem is to provide a method for manufacturing an electrophoretic display device having high display quality.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and it is a technical object of the present invention to provide a method of manufacturing an electrophoretic display device capable of realizing a high quality image in various colors.

SUMMARY OF THE INVENTION The present invention has been made in an effort to solve the above-described problems, and to provide a method of manufacturing an electrophoretic display device capable of improving a problem caused by volatilization of an electrophoretic dispersion in a manufacturing process of internalizing the electrophoretic dispersion on a lower substrate. Shall be.

Other features and advantages of the invention will be set forth in the description which follows, or may be obvious to those skilled in the art from the description and the claims.

According to an aspect of the present invention, there is provided a method of manufacturing an electrophoretic display device, the method including: forming a partition wall defining a plurality of pixel regions and a pixel electrode corresponding to the plurality of pixel regions on a lower substrate; Firstly filling an electrophoretic dispersion liquid comprising charged particles colored with a specific color and a first solvent in a plurality of pixel areas defined by the barrier ribs; Volatilizing the first solvent filled in the plurality of pixel regions by performing a drying process; Inverting the base substrate on which the barrier ribs are formed, and then contacting the second solvent contained in the container to secondaryly fill the plurality of pixel regions with the second solvent; Sealing the upper portion of the partition and the electrophoretic dispersion; And bonding the upper substrate and the lower substrate to each other.

In accordance with another aspect of the present invention, a method of manufacturing an electrophoretic display device includes filling the electrophoretic dispersion liquid for each of red, green, and blue pixels, and simultaneously filling the second solvent in all pixel areas. It is characterized by.

Method of manufacturing an electrophoretic display device according to an embodiment of the present invention for achieving the above object is characterized in that the first solvent is completely volatilized before the filling of the second solvent.

In the manufacturing method of the electrophoretic display device according to the embodiment of the present invention for achieving the above object, the charged particles are red, blue, green, yellow, cyan , Magenta, black, and white colors may be selectively colored.

The manufacturing method of the electrophoretic display device according to the embodiment of the present invention can shorten the time required for the process of filling the electrophoretic dispersion, and can prevent the occurrence of problems caused by volatilization of the electrophoretic dispersion.

The manufacturing method of the electrophoretic display device according to the embodiment of the present invention can prevent the electrophoretic dispersion from overflowing to the upper part of the partition wall during the manufacturing process of internalizing the electrophoretic dispersion onto the lower substrate.

The manufacturing method of the electrophoretic display device according to the embodiment of the present invention can improve the manufacturing efficiency of the electrophoretic display device.

A method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention may improve mass production of an electrophoretic display device.

The method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention can improve the filling method of the electrophoretic dispersion to ensure driving reliability of the electrophoretic display device.

The method of manufacturing an electrophoretic display device according to an embodiment of the present invention can improve the display quality of the electrophoretic display device by preventing unfilling and overfilling of the electrophoretic dispersion.

The present invention according to the embodiment can provide a method of manufacturing an electrophoretic display device that can internalize the electrophoretic dispersion on the lower substrate.

The present invention according to the embodiment can provide a manufacturing method of electrophoresis capable of realizing a color image with high display quality.

In addition, other features and advantages of the present invention may be newly understood through embodiments of the present invention.

1 is a view showing the structure of an electrophoretic display device according to the prior art.
2 is a plan view of an electrophoretic display manufactured by the method of manufacturing an electrophoretic display of the present invention.
3 to 13 illustrate a method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention.

Hereinafter, an electrophoretic display device and a method of manufacturing the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In describing embodiments of the present invention, when a structure is described as being formed 'on or on top' and 'under or under' another structure, these descriptions may be used as well as when these structures are in contact with each other. It should be interpreted as including even if a third structure is interposed between them.

The present invention proposes a method of manufacturing an electrophoretic display device in which an electrophoretic dispersion liquid containing charged particles and a solvent is embedded in a lower substrate.

Although the technical idea of the present invention can be applied to all types of electrophoretic displays regardless of whether a mono or a color is implemented, a color type electrophoretic display will be described as an example.

2 is a plan view of an electrophoretic display manufactured by the method of manufacturing an electrophoretic display of the present invention.

Referring to Figure 2, the present invention, as well as the mono-type electrophoretic display device, the charged particles of the electrophoretic dispersion (electrophoretic ink) is colored in the colors of red (red), blue (blue), green (green) It provides a method of manufacturing an electrophoretic display device for displaying a full color image.

The technical idea of the present invention is equally applicable to a method of manufacturing an electrophoretic display device further including charged particles colored in yellow, cyan, magenta, black, or white. Can be.

In the method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention, a process of forming an electrophoretic layer on a lower substrate is important, and thus a detailed description of the manufacturing method of the upper substrate will be omitted.

The upper substrate includes a base substrate and a common electrode formed on the base substrate.

Here, the upper substrate is to be transparent to display an image, the base substrate of the upper substrate is formed of a glass of transparent material or a material of transparent plastic.

The common electrode is formed by coating a conductive transparent material such as indium tin oxide (ITO) or indium zinc oxide (IZO) on the base substrate.

3 to 13 illustrate a method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention. 3 to 13 sequentially illustrate a method of manufacturing an electrophoretic display device based on a cross section taken along line A1-A2 of FIG. 2. Hereinafter, a method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention will be described with reference to FIGS. 2 to 13.

Referring to FIG. 3, a conductive layer such as copper, aluminum, or ITO is coated on the base substrate 110 to form a conductive layer.

Thereafter, the conductive layer is patterned through a photolithography process and an etching process using a photoresist (photo acrylic) to form the pixel electrode 120 in each of the plurality of pixel regions.

The pixel electrode 120 may be formed by further stacking nickel and / or gold on the above-described materials of copper, aluminum, and indium tin oxide (ITO).

In this case, the base substrate 110 or the base film may be a glass substrate of a transparent material, a plastic substrate or a metal substrate having flexibility. Since the lower substrate 100 of the electrophoretic display device is located on the opposite side of the screen on which the image is displayed, the base substrate 110 is not necessarily transparent.

Although not illustrated in FIGS. 2 and 3, a gate line and a data line are formed on the base substrate 110, and the thin film transistor TFT is formed in an area where the gate line and the data line cross each other.

The gate line and the data line may be formed of a single layer made of silver (Ag), aluminum (Al), or an alloy thereof (Alloy) having a low resistivity, or in addition to such a single layer, chromium ( It may be formed as a multilayer film further comprising a film made of Cr), titanium (Ti), or tantalum (Ta).

The gate of the thin film transistor is connected to the gate line, the source electrode is connected to the data line, and the drain is electrically connected to the pixel electrode 120 through the contact hole. Through this, the on-off of each pixel is switched through the thin film transistor, and the data voltage applied to the data line is supplied to the pixel electrode 120.

Subsequently, after the organic material is coated on the base substrate 110 on which the pixel electrode 120 is formed, the barrier rib 130 is formed to surround the pixel electrode 120 formed in each of the plurality of pixel regions by patterning.

A pixel region (filling cell) in which the electrophoretic dispersion is filled through the partition 130 is defined. At this time, the partition wall may be formed to have a height of 10um ~ 100um and a width of 5um ~ 30um, as shown in FIG.

Here, the partition 130 may be formed using not only the above-described photo lithography method but also an imprinting or mold printing method.

The partition 130 is in contact with the electrophoretic dispersion filled in the pixel region through a subsequent manufacturing process. Therefore, the partition wall 130 is formed of a nonpolar organic material so as to match the physical properties of the first solvent 170 of the electrophoretic dispersion so that the filling of the electrophoretic dispersion may be smoothly performed. Meanwhile, as another embodiment of the present invention, the partition 130 may be formed of a nonpolar inorganic material.

After the partition 130 is formed, the charged particles 140 and the first solvent charged in the positive (+) or negative (-) polarity in each of the pixel regions (filling cells) defined by the partition 130. First, the electrophoretic dispersion consisting of 170 is filled. At this time, the first solvent 170 has a nonpolar characteristic similarly to the partition wall 130.

In this case, when the electrophoretic display implements full color, the charged particles 140 are colored in a color corresponding to the color to be displayed by each cell. Accordingly, the primary filling process of the electrophoretic dispersion composed of the charged particles 140 and the first solvent 170 may be sequentially performed for each color of the colored charged particles 140.

For example, when a plurality of pixels are configured with three colors of red, green, and blue, the pixels correspond to the colors of red, green, and blue. Filling of the electrophoretic dispersion per pixel may be performed sequentially.

Referring to FIG. 5, the first mask 310 that opens only the red pixels among all the pixels is aligned on the partition wall 130. Thereafter, the electrophoretic dispersion liquid composed of the red charged particles and the first solvent is filled in the red pixels by a screen printing method using a squeeze bar 300.

Next, referring to FIG. 6, the second mask 320 that opens only the green pixels among all the pixels is aligned on the partition 130. Thereafter, the electrophoretic dispersion composed of the green charged particles and the first solvent is filled in the green pixels by a screen printing method using a squeeze bar 300.

Subsequently, referring to FIG. 7, the third mask 330 that opens only the blue pixels among all the pixels is aligned on the partition 130. Thereafter, the electrophoretic dispersion liquid composed of the blue charged particles and the first solvent is filled in the green pixels by a screen printing method using a squeeze bar 300.

Here, the first mask 310 to the third mask 330 may be formed of the same material as nickel or the partition 130, and a mesh mask may be used as another example.

At this time, the volume ratio of the first solvent 170 in the electrophoretic dispersion is 10 ~ 30%, the volume ratio of the charged particles 140 is 70 ~ 90%, the first solvent 170 has a viscosity of 100cP ~ 100kcP. . The primary filling process of the electrophoretic dispersion may consist of a squeegee speed of 5-50 [mm / sec] and a pressure of 0.1-30 [kgf] squeegee.

In the prior art, although the evaporation rate of the solvent was fast, there was a limitation in filling the electrophoretic dispersion at atmospheric pressure. However, in the present invention, the electrophoretic dispersion was used to have a high viscosity of 100 cP to 100 ckc. 140 may be filled.

As described above, the electrophoretic dispersion including the charged particles 140 and the first solvent 170 is sequentially filled in the red pixel, the green pixel, and the blue pixel.

5 to 7 illustrate that the red, green, and blue pixels are filled with charged particles colored in a black color together with red charged particles, green charged particles, and blue charged particles, but the present invention is not limited thereto. The charged particles colored with may be filled.

Meanwhile, in addition to the screen printing method, the electrophoretic dispersion primary filling process is a die coating method, a casting method, a bar coating method, a slit coating method, a dispensing method, and the like. A squeezing method, a method, and an inkjet printing method may also be used.

Herein, the first solvent 170 of the electrophoretic dispersion is halogenated solvents, saturated hydrocarbons, silicone oils, low molecular weight halogen-containing polymers ), Epoxides, vinyl ethers, vinyl esters, aromatic hydrocarbons, toluene, naphthalene, paraffinic liquids, polychlorotrifluoro Poly chlorotrifluoroethylene polymers materials may be used.

In this case, the first solvent 170 is used only for filling the charging cells 140 of red, green, and blue colors in the filling cells of the color pixels, and may apply a material suitable for the filling method described above. have.

For example, solvents may be used when the electrophoretic dispersion is filled in a filling cell using an inkjet method, and a material without dissolution and precipitation may be used in consideration of the reactivity of charged particles according to each filling method. Can be. In addition, a highly volatile material may be used as the first solvent to facilitate volatilization time and complete volatilization of the first solvent 170 in a subsequent process.

In the above description, the charged particles 140 are colored in red, green, and blue colors in the primary filling process as an example. However, yellow, cyan, The same may be applied to the case of coloring with magenta.

On the other hand, when the charged particles are colored in a mono (black / white) color, the electrophoretic dispersion can be simultaneously filled in all the pixels.

Subsequently, referring to FIG. 8, after charged particles are filled in each of the red pixels, the green pixels, and the blue pixels, a drying process is performed to completely volatilize the first solvent 170.

At this time, the drying process is performed for 1 minute to 24 hours to completely volatilize the first solvent 170 filled in the entire pixel region. As an example, when the volume of the pixel region (fill cell) is 1.35 × 10 ⁻⁴ cc, the drying process of the first solvent 170 may be performed within 20 minutes. In addition, in order to increase the efficiency of the drying process, a temperature of 150 ° C. or less is added to increase the volatilization rate of the first solvent 170 and completely volatilize the first solvent 170 in all pixel areas.

However, this shows an example of a drying process. When the volatility of the first solvent 170 is high and the volume of the pixel region is small, the drying process time may be further shortened.

On the other hand, when the volatility of the first solvent 170 is low and the volume of the pixel region is large, the drying process may be further extended. Therefore, the drying process proceeds for a proper time period during which the first solvent 170 is completely volatilized in consideration of the volatilization characteristics of the first solvent 170 and the volume of the pixel region.

Subsequently, referring to FIG. 9, the first solvent 170 is completely volatilized, and the second solvent 150 is simultaneously filled in all the pixel regions while the charged particles 140 are filled in each pixel region.

In this case, after the second solvent 150 is contained in the container 340, the base substrate 110 on which the partition wall 130 is formed is inverted to contact the second solvent 150. By the capillary phenomenon, the second solvent 150 may be filled in the filling cell space inside the partition 130 to simultaneously fill the entire pixel with the second solvent 150. Here, the second solvent 150 has a viscosity of 1 cP to 100 cP.

As shown in FIG. 10, after filling the second solvent 150 to the upper end of the partition wall 130, the second solvent 150 is turned upside down so that the charged particles 140 colored in red, green, and blue colors do not overflow with other pixels. . As such, the second solvent 150 having a viscosity of 1 cP to 100 cP is filled in the pixel region in which the charged particles 140 are filled so that the charged particles 140 may be driven by electrophoresis.

In this case, the second solvent 150 may be halogenated solvents, saturated hydrocarbons, silicone oils, low molecular weight halogen-containing polymers, epoxides, etc. (epoxides), vinyl ethers, vinyl esters, aromatic hydrocarbons, toluene, toluene, naphthalene, liquid paraffinic liquids, polychlorotrifluoroethylene polymers ( poly chlorotrifluoroethylene polymers) materials may be used.

The second solvent 150 may be a die coating method, a casting method, a bar coating method, a slit coating method, a dispensing method, or a squeezing method. Each pixel area may be filled by using a screen printing method or an inkjet printing method.

In this case, the second solvent 150 does not necessarily need to be the same material as the first solvent 170, and the material may vary depending on the method of filling the first solvent 170 and the second solvent 150. have.

Subsequently, referring to FIG. 11, a sealing material 160 is formed by coating a real material on the partition wall 130 and on the electrophoretic dispersion. The upper portion of the partition 130 and the electrophoretic dispersion liquid are sealed through the sealing layer 160.

In this case, the sealing layer 160 has a function of bonding the upper substrate 200 and the lower substrate 100 as well as the use of sealing the electrophoretic dispersion.

Here, the sealing layer 160 may be formed by applying an adhesive material on the partition 130 and the pixel region filled with the electrophoretic dispersion, and then imprinting or photolithography. have. As another example, the sealing layer 160 may be formed using a roll-to-roll process using a roller in which a specific pattern is embossed or engraved.

Subsequently, as shown in FIG. 12, the upper substrate 200 is manufactured by forming the common electrode 220 on the base substrate 210. In this case, the manufacturing of the upper substrate 200 may be performed separately from the manufacturing process of the lower substrate 100, and may be prepared in advance through a preceding manufacturing process. Thereafter, the lower substrate 100 and the upper substrate 200 are bonded to each other.

The upper substrate 200 and the lower substrate 100 may be bonded together through a pressurizing process applying a predetermined pressure, and an annealing process applying a predetermined temperature together with the pressurizing process may be performed together.

Meanwhile, the sealing layer 160 may be manufactured in a film type, and then the upper substrate 100 and the lower substrate 200 may be bonded using a lamination process.

The lower substrate 100 and the upper substrate 200 may be bonded together using the sealing layer 160 to completely shield the display area. Accordingly, a defect in which the electrophoretic display is contaminated by external air and moisture can be prevented, and mass production and reliability of the electrophoretic display can be improved.

As shown in FIG. 13, the electrophoretic display device in which the electrophoretic dispersion is embedded in the lower substrate 100 may be manufactured by performing the above-described manufacturing process. In the electrophoretic display device manufactured according to the present invention, the electrophoretic dispersion charged in the pixel region is charged by an electric field formed by a data voltage applied to the plurality of pixel electrodes 120 and a common voltage applied to the common electrode 220. The particles 140 may move in the second solvent 150 to realize a mono image and a color image.

In the above description, the sealing layer 160 has been described as being formed on the lower substrate 100. However, this is an example. In another embodiment of the present invention, the sealing layer 160 is formed on the upper substrate 200. May be

That is, after the sealing layer 160 is formed on the upper substrate 200, the upper substrate 200 and the lower substrate 100 may be bonded together to seal the electrophoretic dispersion embedded in the lower substrate 100.

When the sealing layer 160 is formed on the upper substrate 200, after applying an adhesive material on the common electrode 220, an imprinting process, a photolithography process or a roll-to-roll The sealing layer 160 may be formed using a roll process.

The manufacturing method of the electrophoretic display device according to the embodiment of the present invention described above improves the display quality of the electrophoretic display device by preventing the electrophoretic dispersion from being filled in the manufacturing process of internalizing the electrophoretic layer on the lower substrate. Driving reliability can be secured. In addition, it is possible to prevent defects due to unfilling of the electrophoretic dispersion, thereby improving mass production and manufacturing efficiency of the electrophoretic display.

In addition, the filling process of the electrophoretic dispersion may be smoothly performed by matching the outer wall of the electrophoretic dispersion, that is, the partition and the electrophoretic dispersion.

The manufacturing method of the electrophoretic display device according to the embodiments of the present invention described above has an advantage that the manufacturing infrastructure (infra) used in the existing manufacturing process of the liquid crystal display device can be applied.

Those skilled in the art to which the present invention pertains will understand that the above-described present invention can be implemented in other specific forms without changing the technical spirit or essential features.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: lower substrate 110: base substrate
120 pixel electrode 130 partition wall
140: charged particle 150: second solvent
160: sealing layer 170: the first solvent
200: upper substrate 210: base substrate
220: common electrode 300: squeegee bar
310, 320, 330: mask 340: container

Claims (12)

Forming barrier ribs defining a plurality of pixel regions on the lower substrate and pixel electrodes corresponding to the plurality of pixel regions;
Firstly filling an electrophoretic dispersion liquid comprising charged particles colored with a specific color and a first solvent in a plurality of pixel areas defined by the barrier ribs;
Volatilizing the first solvent filled in the plurality of pixel regions by performing a drying process;
Inverting the base substrate on which the barrier ribs are formed, and then contacting the second solvent in the container to secondary fill the second solvent in the plurality of pixel areas;
Sealing the upper portion of the partition and the electrophoretic dispersion; And
And bonding the upper substrate and the lower substrate to each other. The method of claim 1,
The electrophoretic dispersion is filled for each of red, green, and blue pixels,
A method of manufacturing an electrophoretic display device, wherein the second solvent is simultaneously filled in all pixel regions. The method of claim 1,
In the first step of filling the electrophoretic dispersion,
In the electrophoretic dispersion, the volume ratio of the first solvent is 10-30%, the volume ratio of the charged particles is 70-90%, and the first solvent has a viscosity of 100cP ~ 100kcP. Method of manufacturing the device. The method of claim 1,
The primary filling process of the electrophoretic dispersion is a squeegee speed of 5 to 50 [mm / sec] using a screen printing method using a mask that selectively opens red, green and blue pixels among the plurality of pixel areas. And 0.1 to 30 [kgf] squeegee pressure. The method of claim 1,
And completely volatilizing the first solvent prior to filling the second solvent. The method of claim 5, wherein
A method of manufacturing an electrophoretic display device, wherein the first solvent is completely volatilized by applying a temperature of 150 ° C. or less. The method of claim 1,
The drying process for volatilizing the first solvent is performed for 1 minute to 24 hours. The method of claim 1,
The second solvent has a viscosity of 1cP ~ 100cP The manufacturing method of the electrophoretic display device. The method of claim 1,
Die coating method, casting method, bar coating method, slit coating method, dispensing method, squeezing method, screen printing method And performing the first filling process by one of inkjet printing. The method of claim 1,
The first and second solvents are halogenated solvents, saturated hydrocarbons, silicone oils, low molecular weight halogen-containing polymers, and epoxides. epoxides, vinyl ethers, vinyl esters, aromatic hydrocarbons, toluene, toluene, naphthalene, liquid paraffinic, polychlorotrifluoroethylene polymers (poly chlorotrifluoroethylene polymers) A method of manufacturing an electrophoretic display, characterized in that it comprises one of the materials. The method of claim 1,
The first solvent and the second solvent is a non-polar organic material manufacturing method of the electrophoretic display device. The method of claim 1,
The charged particles may be selectively colored with red, blue, green, yellow, cyan, magenta, black, and white colors. Method of manufacturing an electrophoretic display, characterized in that.

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