KR101947377B1 - Electrophoretic display device and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an electrophoretic display device having improved display quality and a method of manufacturing an electrophoretic display device capable of improving the manufacturing efficiency.
An electrophoretic display device according to an embodiment of the present invention includes an upper substrate on which a common electrode is formed; A lower substrate on which pixel electrodes are formed in pixel regions, respectively; A spacer formed between the upper substrate and the lower substrate to form a cell gap; And charged particles and solvent colored in a specific color filled in the pixel region formed by the sal gap.

Description

ELECTROPHORETIC DISPLAY DEVICE AND METHOD FOR MANUFACTURING THE SAME [0002]

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

An electrophoretic display device is an apparatus that displays an image by using electrophoresis phenomenon in which colored charged particles are moved by an electric field applied from the outside. Here, the electrophoresis phenomenon refers to a phenomenon that the charged particles move in the solvent by the Coulomb force when an electric field is applied to an electrophoretic dispersion (e-ink) in which charged particles are dispersed in a solvent.

The electrophoretic display using the electrophoresis phenomenon is characterized by bistability, so that the original image can be displayed for a long time even when the applied voltage is removed. That is, the electrophoretic display device is suitable for the e-book field in which it is not required to swiftly change the screen because the electrophoretic display device can maintain a certain screen for a long time without continuously applying a voltage.

In addition, the electrophoretic display device has no dependency on the viewing angle, and can provide a comfortable image to the eye to a degree similar to paper. Flexibility, low power consumption and eco-like flexibility are also available.

1 is a view showing an electrophoretic display device according to the prior art.

Referring to FIG. 1, an electrophoretic display device according to the related art includes a lower substrate 10, an upper substrate 20, and an electrophoretic film 30. The electrophoretic film 30 is interposed between the lower substrate 10 and the upper substrate 20.

A plurality of gate lines (not shown) and a plurality of data lines (not shown) are formed on the lower substrate 10 so as to cross each other. A plurality of pixels are defined by a plurality of gate lines and a plurality of data lines. A thin film transistor (TFT) (not shown) and a pixel electrode (not shown) are formed on a plurality of pixels formed on the lower substrate 10.

The thin film transistor is switched according to the scan signal applied through the gate line. Switching of the thin film transistor causes the data voltage supplied through the data line to be supplied to the pixel electrode.

The upper substrate 20 includes a common electrode 22 facing the pixel electrode.

The electrophoretic film 30 includes a plurality of microcapsules 32 and an adhesive layer 34.

The plurality of microcapsules 32 are composed of a plurality of charged particles and a solvent.

A plurality of charged particles are partially charged to positive (+), and the remaining part is charged to negative (-). The adhesive layer 34 protects the microcapsules 32 and adheres the electrophoretic film 30 to the lower substrate 10.

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 contained in the microcapsule 32 are moved by electrophoresis to realize an image .

The electrophoretic display device according to the related art produces the lower substrate 10, the upper substrate 20 and the electrophoretic film 30, respectively. The electrophoretic film 30 is stored and transported in an attached state to the upper substrate 20. Thereafter, the release film (not shown) attached to the lower part of the electrophoretic film 30 is removed, and the electrophoretic film 30 is attached to the lower substrate 10 by a lamination process.

Therefore, since the lower substrate 10, the upper substrate 20, and the electrophoretic film 30 must be separately manufactured, the manufacturing process is complicated, and the manufacturing time is long, which results in a low manufacturing efficiency. In addition, since the separately prepared electrophoretic film 30 must be applied, the manufacturing cost increases.

On the other hand, an electrophoretic display device of the internalization type in which the electrophoretic dispersion 30 is replaced by the electrophoretic dispersion 30 has been developed, but the development of the device structure and the manufacturing process is not matured, There is a problem that contamination and color mixing are generated.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrophoretic display device with improved display quality and a method of manufacturing the same.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems and it is a technical object to improve the manufacturing efficiency of the electrophoretic display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrophoretic display device with improved driving reliability and a method of manufacturing the same.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrophoretic display device capable of realizing high quality images in various colors and a method of manufacturing the same.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a manufacturing method of an electrophoretic display device capable of preventing uncharged and overfilled electrophoretic dispersion.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an electrophoretic display device,

An object of the present invention is to provide an electrophoretic display device and a method of manufacturing the same that can prevent color mixing of charged particles in the lower substrate.

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 an electrophoretic display including: an upper substrate having a common electrode; A lower substrate on which pixel electrodes are formed in pixel regions, respectively; A spacer formed between the upper substrate and the lower substrate to form a cell gap; And charged particles and a solvent colored in a specific color filled in the pixel region formed by the sal gap.

According to another aspect of the present invention, there is provided a method of manufacturing an electrophoretic display including: forming a plurality of pixel electrodes in a plurality of pixel regions defined in a lower substrate; Forming a spacer having a predetermined height between the plurality of pixel electrodes; Filling charged pixel particles colored with a specific color in a pixel region between the upper substrate and the lower substrate; Attaching the upper substrate and the lower substrate on which the common electrode is formed; Filling a pixel region filled with the charged particles with a driving solvent; And sealing the pixel region in which the charged particles and the driving solvent have been completely filled.

According to another aspect of the present invention, there is provided a method of manufacturing an electrophoretic display including: forming a plurality of pixel electrodes in a plurality of pixel regions defined in a lower substrate; Forming a spacer having a predetermined height between the plurality of pixel electrodes; Attaching the upper substrate and the lower substrate on which the common electrode is formed; Filling the pixel region between the upper substrate and the lower substrate with the charged particles and the driving solvent colored in a specific color; And sealing the pixel region in which the charged particles and the driving solvent have been completely filled.

The electrophoretic display device according to the embodiment of the present invention can improve display quality.

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

The present invention can provide an electrophoretic display device with improved driving reliability and a method of manufacturing the same.

The present invention can provide an electrophoretic display device and a method of manufacturing the same that can realize an image of high quality in various colors.

The method of manufacturing an electrophoretic display device according to an embodiment of the present invention can prevent uncharged and overfilled electrophoretic dispersion.

The present invention can prevent the electrophoretic dispersion from being overflowed to the upper part of the barrier rib in the manufacturing process for internalizing the electrophoretic dispersion in the lower substrate.

The present invention can provide an electrophoretic display device and a method of manufacturing the electrophoretic display device that can prevent color mixing of charged particles in the lower substrate.

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 an electrophoretic display device according to a prior art.
2 and 3 are views showing an electrophoretic display device according to an embodiment of the present invention capable of displaying monochrome images.
Figs. 4 and 5 are diagrams showing an electrophoretic display device according to an embodiment of the present invention capable of displaying a color image. Fig.
6 to 12 are views showing a manufacturing method of the electrophoretic display device according to the first embodiment of the present invention.
13 to 19 are views showing a manufacturing method of an electrophoretic display device according to a second embodiment of the present invention.
20 to 24 are views showing a manufacturing method of an electrophoretic display device according to a third embodiment of the present invention.
25 to 33 are views showing a manufacturing method of an electrophoretic display device according to a fourth 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 an embodiment of the present invention, when it is described that a structure is formed on or above another structure, and below or below it, such a substrate may be formed of any of these structures, To the extent that a third structure is interposed between the first and second structures.

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

The technical idea of the present invention can be applied to all types of electrophoretic display devices regardless of whether a monochrome image or a color image is displayed.

2 and 3 are views showing an electrophoretic display device according to an embodiment of the present invention capable of displaying monochrome images. FIG. 2 is a plan view of an electrophoretic display device according to an embodiment of the present invention capable of displaying a monochrome image, and FIG. 3 is a cross-sectional view taken along the line A1-A2 shown in FIG.

2 and 3, an electrophoretic display device according to an embodiment of the present invention includes an electrophoretic layer for displaying an image embedded in a lower substrate 100, an upper substrate 200, and a lower substrate 100 do.

The lower substrate 100 includes a lower base substrate 110, a pixel electrode 120 and a spacer 130. The lower substrate 100 is provided with a spacer 130 for displaying an image by electrophoresis Electrophoretic dispersion liquid, that is, a display solvent is filled.

Although not shown in the figure, a plurality of gate lines (not shown) and a plurality of data lines (not shown) are formed on the lower base substrate 110 so as to intersect with each other. A plurality of pixels are defined by intersection of a plurality of gate lines and a plurality of data lines, and a thin film transistor (TFT) is formed in each of the plurality of pixels.

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. 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. [

The spacer 130 has a columnar shape with a height of 10 mu m to 100 mu m and is formed in a dot pattern in a pixel region (active region). A cell gap is formed by the spacer 130 to provide a pixel region, that is, a filling space, in which the electrophoretic dispersion liquid can be filled.

The spacer 130 is formed of a non-polar organic material or a non-polar inorganic material so that the electrophoretic dispersion can be filled smoothly in the manufacturing process so as to match the physical properties of the electrophoretic dispersion.

The electrophoretic dispersion layer is filled in the filling space provided by the spacer 130 to form an electrophoretic layer for displaying an image. Here, the electrophoretic dispersion liquid is composed of a plurality of charged particles 140 and a driving solvent 150.

Some of the plurality of charged particles 140 are charged to positive (+) polarity and the remainder are charged to negative (-) polarity.

When the electrophoretic display device displays a monochrome image, as shown in Figs. 2 and 3, a plurality of charged particles 140 are colored in black color and white color.

At this time, the charged particles of black color may be formed of a carbon black material, and the charged particles of white color may be formed of titanium oxide (TiO ₂ ).

The non-polar organic or non-polar inorganic material having a viscosity of 10 cP to 10 KcP may be applied to the driving solvent 150 so that the charged particles 140 can be moved by electrophoresis.

As one example, the driving solvent 150 may include halogenated solvents, saturated hydrocarbons, silicone oils, low molecular weight halogen-containing polymers, epoxides (such as epoxides, vinyl ethers, vinyl esters, aromatic hydrocarbons, toluene, naphthalene, liquid paraffinic liquids or polychlorotrifluoroethylene polymers poly chlorotrifluoroethylene polymers) materials can be used.

The upper substrate 200 includes an upper base substrate 210, a common electrode 220, and a sealing layer 230.

Since the upper substrate 200 is transparent to display an image, the upper base substrate 210 may be formed of transparent glass or transparent plastic.

The common electrode 220 is formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

The sealing layer 230 is formed of a transparent sealant on the common electrode 230 and seals the electrophoretic dispersion liquid contained in the lower substrate 100 through the sealing layer 230. At this time, the sealing layer 230 has a function of not only sealing the electrophoretic dispersion but also bonding the lower substrate 100 and the upper substrate 200 together.

The charged particles 140 of the electrophoretic dispersion filled in the pixel region by the electric field formed by the data voltage applied to the plurality of pixel electrodes 120 and the common voltage applied to the common electrode 220 are injected into the driving solvent 150 So that a monochrome image can be displayed.

The electrophoretic display device according to the embodiment of the present invention which can display a monochrome image having the above-described configuration can form a spacer 130 in the pixel region in a dot pattern so that the electrophoretic dispersion liquid can be filled in the lower substrate 100 Thereby forming a cell gap. Since the spacers 130 are formed in a dot pattern, the aperture ratio is high and the display quality can be improved by increasing the brightness and contrast ratio of the image.

4 and 5 are views showing an electrophoretic display device according to an embodiment of the present invention capable of displaying a color image. 4 is a plan view of an electrophoretic display device according to an embodiment of the present invention capable of displaying a color image, and Fig. 5 is a cross-sectional view taken along the line B1-B2 shown in Fig.

In describing the electrophoretic display device according to the embodiment of the present invention capable of displaying a color image, a detailed description of the same configuration as the electrophoretic display device according to the embodiment of the present invention capable of displaying the above- Is omitted.

4 and 5, an electrophoretic display device according to an embodiment of the present invention capable of displaying a color image includes an electrophoretic display device including an upper substrate 200, an upper substrate 200, Dispersions.

The lower substrate 100 includes a lower base substrate 110, a pixel electrode 120, and a spacer 160.

The spacer 160 is formed as a stripe wall having a length elongated in one direction (longitudinal direction in the drawing). At this time, the spacers 160 are formed to have a height of 10 μm to 100 μm to form cell gaps between the upper substrates 200 of the lower substrate 100.

The space provided by the spacer 160 is filled with an electrophoretic dispersion liquid for displaying an image by electrophoresis, that is, a display solvent.

The red pixel, the green pixel and the blue pixel corresponding to the color to be displayed by each pixel are separated by the spacer 160, and the red, green and blue pixels are colored with the driving solvent 150 and the color corresponding to the pixel A plurality of charged particles 170 are filled. At this time, the electrophoretic dispersion liquid is composed of the charged particles 170 and the driving solvent 150.

The spacer 160 is formed of a non-polar organic material or a non-polar inorganic material so as to match the physical properties of the electrophoretic dispersion, so that the filling of the electrophoretic dispersion liquid can be smoothly performed during the manufacturing process.

Some of the plurality of charged particles 170 are charged with a positive (+) polarity and the remainder with a negative (-) polarity.

The non-polar organic or non-polar inorganic material having a viscosity of 10 cP to 10 KcP may be applied to the driving solvent 150 so that the charged particles 170 can be moved by electrophoresis, and the same material as the above- .

When the electrophoretic display device displays a color image, the charged particles 170 are colored in a color corresponding to the color to be displayed by each pixel. At this time, the plurality of charged particles 170 may be colored in red, green, blue, and black colors. Although not shown in the figure, the charged particles may be colored in yellow, cyan, magenta, or white.

It is possible to display a color image by constituting one unit pixel with three pixels capable of displaying red color, green color and blue color.

Red pixels for displaying red color are filled with red color charged particles. Green pixels for displaying green color are filled with green colored charged particles. Blue pixels for displaying blue color are filled with blue colored charged particles. At the same time, the red pixels, the green pixels and the blue pixels are filled with charged particles of black color.

The upper substrate 200 includes an upper base substrate 210, a common electrode 220, and a sealing layer 230.

The common electrode 220 is formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).

The sealing layer 230 is formed of a transparent sealant on the common electrode 230 and seals the electrophoretic dispersion liquid contained in the lower substrate 100 through the sealing layer 230.

In the electrophoretic display device according to the embodiment of the present invention capable of displaying a color image having the above-described structure, the spacers 160 are arranged in a single direction in the pixel region so that the electrophoretic dispersion liquid can be filled in the lower substrate 100 (Vertical direction in the drawing) is formed as a stripe wall having an elongated length. The red pixel, the green pixel, and the blue pixel are separated through the spacer 160 to form a cell gap.

The charged particles 170 of the electrophoretic dispersion filled in the pixel region by the electric field formed by the data voltage applied to the plurality of pixel electrodes 120 and the common voltage applied to the common electrode 220 are injected into the driving solvent 150 So that a color image can be displayed.

The electrophoretic display device according to the embodiment of the present invention capable of displaying a color image is formed by a stripe barrier rib whose length is extended in one direction (longitudinal direction in the drawing). By the spacer 160, it is possible to prevent the charged particles from overlapping with the pixels of other colors neighboring to the red pixel, the green pixel, and the blue pixel.

In addition, by sealing the lower substrate 100 and the upper substrate 200 using the sealing layer 230, it is possible to completely shield the display area. Therefore, it is possible to prevent defects in the electrophoretic display device from being contaminated by external air and moisture, and to improve the mass productivity and reliability of the electrophoretic display device.

6 to 12 are views showing a manufacturing method of the electrophoretic display device according to the first embodiment of the present invention. Hereinafter, a method of manufacturing the electrophoretic display device according to the first embodiment of the present invention will be described with reference to FIGS. 6 to 12. FIG.

6, a conductive material such as copper (Cu), aluminum (Al), indium tin oxide (ITO), or indium zinc oxide (IZO) is coated on the lower base substrate 110, . Thereafter, a photoresist (PR) is applied on the conductive layer, and a photolithography process and an etching process using the photoresist as a mask are performed to pattern the conductive layer.

A plurality of pixel electrodes 120 are formed of copper, aluminum, ITO or IZO material in each of a plurality of pixel regions by patterning a conductive layer. Meanwhile, the pixel electrode 120 may be formed by further depositing nickel (Ni), gold (Au), or the like on the above-described copper, aluminum, ITO, or IZO material.

Here, the lower base substrate 110 may be a transparent glass substrate, a flexible plastic substrate, or a metal substrate. 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 lower base substrate 110 is not necessarily transparent.

Although not shown in FIG. 6, a plurality of pixels are defined in the lower base substrate 110 such that a plurality of gate lines and a plurality of data lines cross each other. The gate line and the data line may be formed of a single film made of silver (Ag), aluminum (Al), or alloy (Alloy) having a low resistivity.

On the other hand, the gate line and the data line may be formed of a multilayer film further including a film made of chromium (Cr), titanium (Ti), or tantalum (Ta) having excellent electrical characteristics.

The gate of the thin film transistor is connected to the gate line, the source is connected to the data line, and the drain is electrically connected to the pixel electrode 120. And the on-off of the pixel is switched through the thin film transistor. When a scan pulse is applied to the gate of the thin film transistor through the gate line, the thin film transistor is turned on, and the data voltage applied to the data line is supplied to the pixel electrode 120.

7, an organic material is coated on the lower base substrate 110 on which the pixel electrode 120 is formed, and then patterned to form a plurality of spacers 130 in the pixel region. A plurality of spacers 130 may be formed between the pixel electrodes 120 to prevent the aperture ratio of the pixels from being lowered.

The spacer 130 has a columnar shape with a height of 10 to 100 mu m and is formed in a dot pattern in a pixel region where the pixel electrode 120 is not formed. A cell gap is formed between the lower substrate 100 and the upper substrate 200 by the spacer 130 to provide a filling space for filling the electrophoretic dispersion liquid.

Here, the spacer 130 may be formed using imprinting or mold printing as well as the photolithography method described above.

The spacer 130 is formed of a non-polar organic material to match the physical properties of the electrophoretic dispersion. Meanwhile, as another embodiment of the present invention, the spacer 130 may be formed of a non-polar inorganic material.

Next, referring to FIG. 8, the charged particles 140 and the filling solvent 155 are filled in the pixel region.

Specifically, as shown in Fig. 8 (A), the mask 300 on which the opening 302 for opening each pixel is formed is aligned on the spacer 130. In this case, the thickness of the mask 300 may be 20 to 40 占 퐉, and the hole 302 may have a hole size of 30 to 60 占 퐉.

The mask 300 may be a metal mask made of nickel, an organic mask having the same material as the spacer 130, or an inorganic mask. On the other hand, a mesh mask may be used.

8 (B), an electrophoretic dispersion liquid, that is, a display solvent composed of the charged particles 140 and the filling solvent 155 (the first solvent), that is, the display solvent, is filled in the entire screen printing method using the squeegee bar 400 Fill the pixels. At this time, the charged particles 140 are filled in a volume corresponding to 10% to 50% of the filling space.

The filling process of the electrophoretic dispersion composed of the charged particles 140 and the filling solvent 155 (first solvent) may be performed at a squeegee speed of 5 to 50 [mm / sec] and a squeegee pressure of 0.1 to 30 [Kgf / .

Here, the plurality of charged particles 140 are colored in black color and white color. The charged particles of the black color may be formed of a carbon black material, and the charged particles of white color may be formed of titanium oxide (TiO ₂ ).

In addition, the electrophoretic dispersion liquid filling process may be performed by a die coating method, a casting method, a bar coating method, a slit coating method, a dispensing method, A squeezing method, a method, or an inkjet printing method may be used.

9, all the pixels are filled with the charged particles 140 and the filling solvent 155 (first solvent), and then the drying (volatilization) process is performed to volatilize the filling solvent 155 (the first solvent) . At this time, some or all of the filling solvent 155 (the first solvent) can be volatilized.

When the filling solvent 155 (the first solvent) is partially volatilized, the filling solvent 155 (the first solvent) may be volatilized for 10 minutes to 30 minutes.

When the filling solvent (155, first solvent) is completely volatilized, the drying process is carried out for 10 minutes to 24 hours.

In order to increase the efficiency of the drying process, the volatilization rate of the filling solvent 155 (the first solvent) can be increased by applying a temperature of 150 ° C or less. However, this shows one example of the drying process, and the volatile property of the filling solvent 155 (first solvent) is high, and the time of the drying process can be further shortened when the volume of the pixel region is small.

On the other hand, if the volatility of the filling solvent 155 (the first solvent) is low and the volume of the pixel region is large, the time of the drying process can be further extended. Therefore, the drying time of the drying process proceeds for a proper time considering the volatility characteristics of the filling solvent 155 (the first solvent) and the volume of the pixel region.

10, a common electrode 220 and a sealing layer 230 are formed on the upper base substrate 210 to manufacture an upper substrate 200. At this time, the upper substrate 200 is manufactured separately from the manufacturing process of the lower substrate 100, and may be prepared in advance through a preceding manufacturing process.

Thereafter, the sealing layer 230 is used to seal the spacer 130 and the electrophoretic dispersion, and the lower substrate 100 and the upper substrate 200 are bonded together.

Since the upper substrate 200 is transparent to display an image, the upper base substrate 210 (second base substrate) may be formed of transparent glass or transparent plastic.

The common electrode 220 is formed of a transparent conductive material such as ITO on the upper base substrate 210 and is formed in a plate shape corresponding to the entire pixel region.

The sealing layer 230 may be formed by applying an adhesive material on the common electrode 220 and then imprinting or photolithography.

As another example, the sealing layer 230 may be formed using a roll-to-roll process using rollers formed with embossed or embossed patterns.

Meanwhile, the sealing layer 230 may be formed in a film type, and then the upper substrate 100 and the lower substrate 200 may be bonded together using a lamination process.

The joining of the upper substrate 200 and the lower substrate 100 may be performed through a pressurizing process to apply a predetermined pressure and an annealing process to apply a constant temperature together with the pressing process.

Next, referring to FIG. 11, a container 500 containing a driving solvent (a second solvent) 150 is prepared. Thereafter, the lower substrate 100 and the upper substrate 200 are vertically stacked and immersed in a driving solvent 150 contained in the container 500. In the following description, the lower substrate 100 and the upper substrate 200 are simply referred to as a 'panel'.

Next, referring to FIG. 12, a driving solvent (a second solvent) 150 for electrophoresis of the charged particles 140 is simultaneously filled in the entire pixel region.

Specifically, the cell gap is formed by the spacer 130 on the panel. When the driving solvent 150 is contacted, the driving solvent 150 is filled in the space of the entire pixel area by the capillary phenomenon.

The non-polar organic or non-polar inorganic material having a viscosity of 10 cP to 10 KcP may be applied to the driving solvent 150 so that the charged particles 140 can be moved by electrophoresis.

As one example, the driving solvent 150 may include halogenated solvents, saturated hydrocarbons, silicone oils, low molecular weight halogen-containing polymers, epoxides (such as epoxides, vinyl ethers, vinyl esters, aromatic hydrocarbons, toluene, naphthalene, liquid paraffinic liquids or polychlorotrifluoroethylene polymers poly chlorotrifluoroethylene polymers) materials can be used.

Here, the same material may be applied to the filling solvent 155 (the first solvent) and the driving solvent 150 (the second solvent). However, the filling solvent 155 and the driving solvent 150 do not necessarily have to be the same material, and the filling solvent 155 and the driving solvent 150 may use different materials depending on the method of filling the respective solvents.

After the charging of the plurality of charged particles 140 and the driving solvent 150 into the pixel region between the lower substrate 100 and the upper substrate 200 is completed, Sealed with a sealant so that a plurality of the charged particles 140 and the driving solvent 150 do not flow out to the outside.

In the method of manufacturing the electrophoretic display device according to the first embodiment of the present invention, the charged particles 140 are filled in the pixel region, and then the lower substrate 100 and the upper substrate 200 are bonded together. After the lower substrate 100 and the upper substrate 200 are bonded together, the pixel region is filled with the driving solvent 150 to fill the entire pixel region with the uniformly charged particles 140 and the driving solvent 150 .

After the charging of the charged particles 140 and the driving solvent 150 is completed, the panel is sealed with a sealant to prevent the driving solvent 150 from being volatilized. As described above, the volatilization of the driving solvent 150 is suppressed, and the amount of the charged particles 140 and the driving solvent 150 filled in all the pixels can be uniformly maintained to prevent a change in characteristics.

When the charged particles 140 and the driving solvent 150 are filled in the state where the lower substrate 100 and the upper substrate 200 are bonded together and the charged particles 140 and the driving solvent 150 are filled in the active area ) Can be prevented from being overflowed and contaminated.

The filling process of the driving solvent 150 may be performed by a screen printing method using a squeeze bar, a die coating method, a casting method, A bar coating method, a slit coating method, a dispensing method, a squeezing method, a method, or an inkjet printing method may be applied.

13 to 19 are views showing a method of manufacturing the electrophoretic display device according to the second embodiment of the present invention. Hereinafter, a method of manufacturing the electrophoretic display device according to the second embodiment of the present invention will be described with reference to FIGS. In the following description of the manufacturing method of the electrophoretic display device according to the second embodiment of the present invention, detailed description of the same contents as those of the first embodiment will be omitted.

Referring to FIG. 13, a plurality of pixel electrodes 120 are formed on a base substrate 110. At this time, the pixel electrode 120 may be formed of an opaque metal such as copper or aluminum, or may be formed of a conductive transparent material such as ITO or IZO.

Referring to FIG. 14, an organic material is coated on a lower base substrate 110 on which a pixel electrode 120 is formed, and then patterned to form a spacer 160 in a pixel region.

Here, a plurality of pixels are formed in the pixel region, and the plurality of pixels are composed of red pixels for displaying red color, green pixels for displaying green color, and blue pixels for displaying blue color.

The spacers 160 are formed as stripe walls elongated in one direction (longitudinal direction in the drawing) to separate red pixels, green pixels, and blue pixels. At this time, the spacers 160 are formed to have a height of 10 μm to 100 μm to form cell gaps between the upper substrates 200 of the lower substrate 100.

Next, referring to FIG. 15, charged particles 170 and a filling solvent 155 (first solvent) are filled. At this time, in order to display a color image, the charged particles 170 are colored in colors to be displayed by the pixels. Therefore, red pixels, green pixels, and blue pixels are sorted to fill the charged region 170 and the filling solvent 155 in the pixel region.

Specifically, as shown in FIG. 15A, the first mask 310 having openings 312 for opening only the red pixels among all the pixels is aligned on the upper portion of the spacer 160.

Thereafter, the electrophoretic dispersion composed of the charged particles 170 of the red color and the black color and the filling solvent 155 (the first solvent) is filled in the red pixels by the screen printing method using the squeegee bar 400.

Next, as shown in FIG. 15B, the second mask 320 having openings 322 for opening only the green pixels among all the pixels is aligned on the upper portion of the spacer 160.

Then, the electrophoretic dispersion composed of the charged particles 170 of the green color and black color and the filling solvent 155 is filled in all the green pixels by a screen printing method using the squeegee bar 400.

Next, as shown in FIG. 15C, the third mask 330 having openings 332 for opening only the blue pixels among all the pixels is aligned on the upper portion of the spacer 160.

Thereafter, the electrophoretic dispersion composed of the charged particles 170 of blue and black colors and the filling solvent 155 is filled in all the green pixels by a screen printing method using the squeegee bar 400.

Here, the charged particles 170 are filled in a volume corresponding to 10% to 50% of the filling space of red pixels, green pixels and blue pixels.

The filling process of the electrophoretic dispersion composed of the charged particles 170 and the filling solvent 155 may be performed at a squeegee speed of 5 to 50 mm / sec and a squeegee pressure of 0.1 to 30 kg / cm2.

Here, the thicknesses of the first to third masks 310 to 330 are 20 to 40 μm, and the hole sizes of the openings 312, 322, and 332 are 30 to 60 μm. have.

The first to third masks 310 to 330 may be formed of a metal mask made of nickel, an organic mask having the same material as that of the spacer 160, or an inorganic mask. On the other hand, a mesh mask may be used.

In Fig. 15, charged particles of red color, charged particles of green color, and charged particles of blue color are shown filled with red colored pixels, green colored pixels and blue colored pixels. However, the present invention is not limited to this, and charged particles of different colors, for example, charged particles of white color, may be filled in place of charged particles of black color.

In addition to the screen printing method described above, the filling process of the charged particles 170 and the filling solvent 155 may be performed by a die coating method, a casting method, a bar coating method, a slit coating method Coating method, a dispense method, a squeezing method, a method, or an inkjet printing method may be applied.

16, red particles, green pixels, and blue pixels are filled with charged particles 170 and a filling solvent 155 of each color, and then a drying process is performed to fill the filling solvent 155 Volatilize. At this time, part or all of the filling solvent 155 can be volatilized.

When the filling solvent 155 is partially volatilized, the filling solvent 155 can be volatilized for 10 minutes to 30 minutes. On the other hand, when the filling solvent 155 is completely volatilized, the drying process is performed for 10 minutes to 24 hours. In order to increase the efficiency of the drying process, it is possible to increase the volatilization rate of the filling solvent 155 by applying a temperature of 150 ° C or less.

On the other hand, if the volatility of the filling solvent 155 is low and the volume of the pixel region is large, the time of the drying process can be further extended. Therefore, the progressing time of the drying process proceeds for a proper time considering the volatility characteristics of the filling solvent 155 and the volume of the pixel region.

17, a common electrode 220 and a sealing layer 230 are formed on an upper base substrate 210 to manufacture an upper substrate 200. At this time, the upper substrate 200 is manufactured separately from the manufacturing process of the lower substrate 100, and may be prepared in advance through a preceding manufacturing process.

Thereafter, the sealing layer 230 is used to seal the upper portion of the spacer 160 and the electrophoretic dispersion, and the lower substrate 100 and the upper substrate 200 are bonded together.

The joining of the upper substrate 200 and the lower substrate 100 may be performed through a pressurizing process to apply a predetermined pressure and an annealing process to apply a constant temperature together with the pressing process.

The materials and manufacturing method of the upper base substrate 210, the common electrode 220, and the sealing layer 230 shown in FIG. 17 are the same as the manufacturing method of the electrophoretic display device according to the first embodiment described above.

Next, referring to FIG. 18, a container 500 containing a driving solvent (a second solvent) 150 is prepared. Thereafter, the panel is set in the longitudinal direction and immersed in the driving solvent 150 contained in the container 500.

19, a driving solvent (a second solvent) 150 for electrophoresis of the charged particles 170 is filled in the entire pixel region. Since the red pixel, the green pixel and the blue pixel region are already filled with the charged particles 170 in the previous process, the driving solvent 150 can be filled in the entire pixel region at the same time.

Specifically, a cell gap is formed by the spacer 160 on the panel. When the driving solvent 150 is contacted, the driving solvent 150 is filled in the space of the entire pixel region by the capillary phenomenon.

The non-polar organic or non-polar inorganic material having a viscosity of 10 cP to 10 KcP may be applied to the driving solvent 150 so that the charged particles 170 can be moved by electrophoresis. At this time, the same solvent as that of the first embodiment may be used for the driving solvent 150.

The driving solvent 150 is filled up to 80% to 100% of the filling space. As described above, the driving solvent 150 is filled in the pixel region so that the charged particles 170 are driven by electrophoresis.

The filling process of the driving solvent 150 may be performed by a screen printing method using a squeeze bar, a die coating method, a casting method, A bar coating method, a slit coating method, a dispensing method, a squeezing method, a method, or an inkjet printing method may be applied.

Here, the same material may be applied to the filling solvent 155 (the first solvent) and the driving solvent 150 (the second solvent). However, the filling solvent 155 and the driving solvent 150 do not necessarily have to be the same material, and the filling solvent 155 and the driving solvent 150 may use different materials depending on the method of filling the respective solvents.

In the above description, the charged particles 170 are colored in the colors of red, green, blue, and black. However, the present invention is not limited to this, and the charged particles 170 may be colored in yellow, cyan, magenta, and white colors. In this case, Can be applied.

After the driving solvent 150 is filled in all the pixels, the outer periphery of the panel is sealed with a sealant so that the driving solvent 150 and the charged particles 170 do not flow out of the panel.

The method of manufacturing the electrophoretic display device according to the second embodiment of the present invention is a method of filling electrophoretic particles 170 for each color of a pixel and attaching the lower substrate 100 and the upper substrate 200 together, The driving solvent 150 can be filled in the entire pixel region to fill the uniform amount of the charged particles 170 and the driving solvent 150 in the entire pixel region.

Further, it is possible to manufacture an electrophoretic display device capable of displaying a high-quality color image by preventing defects of contamination and color mixing while filling the charged particles 140 of red color, green color and blue color.

Further, the panel may be sealed immediately after the filling of the driving solvent 150 is completed to prevent the driving solvent 150 from being volatilized. The volatilization of the driving solvent 150 is suppressed and the amount of the charged particles 170 and the driving solvent 150 filled in all the pixels can be uniformly maintained to prevent a change in characteristics.

The charged particles 170 and the driving solvent 150 are overflowed out of the active area to be contaminated by filling the driving solvent 150 in a state where the lower substrate 100 and the upper substrate 200 are bonded together Can be prevented.

In addition, it is possible to prevent uncharging and filling of the electrophoretic dispersion, thereby improving the display quality of the electrophoretic display device and securing the driving reliability.

In addition, it is possible to prevent defects due to uncharging and filling of the electrophoretic dispersion, thereby improving the mass productivity and manufacturing efficiency of the electrophoretic display device.

20 to 24 are views showing a method of manufacturing the electrophoretic display device according to the third embodiment of the present invention. Hereinafter, a method of manufacturing the electrophoretic display device according to the third embodiment of the present invention will be described with reference to FIGS. 20 to 24. FIG. In the following description of the method of manufacturing an electrophoretic display device according to the third embodiment of the present invention, detailed description of the same contents as those of the first and second embodiments will be omitted.

Referring to FIG. 20, a conductive layer such as copper, aluminum, ITO, or IZO is coated on a lower base substrate 110 (first base substrate) to form a conductive layer. Thereafter, a photoresist is coated on the conductive layer, and a conductive layer is patterned by performing a photolithography process and an etching process using the photoresist as a mask.

A conductive layer is patterned to form a plurality of pixel electrodes 120 of copper, aluminum, ITO, or IZO in each of the plurality of pixel regions. Meanwhile,

Here, the lower base substrate 110 may be a transparent glass substrate, a flexible plastic substrate, or a metal substrate.

21, an organic material is coated on a lower base substrate 110 on which a pixel electrode 120 is formed, and then patterned to form a spacer 130 in a pixel region. At this time, the spacers 130 may be formed between the pixel electrodes 120 to prevent the aperture ratio of the pixels from being lowered.

The spacer 130 has a columnar shape with a height of 10 to 100 mu m and is formed in a dot pattern in a pixel region where the pixel electrode 120 is not formed. A cell gap is formed by the spacer 130 to provide a filling space in which the electrophoretic dispersion liquid can be filled.

Here, the spacer 130 may be formed using imprinting or mold printing as well as the photolithography method described above.

The spacer 130 is formed of a non-polar organic material to match the physical properties of the electrophoretic dispersion. Meanwhile, as another embodiment of the present invention, the spacer 130 may be formed of a non-polar inorganic material.

22, a common electrode 220 and a sealing layer 230 are formed on an upper base substrate 210 to manufacture an upper substrate 200. At this time, the upper substrate 200 is manufactured separately from the manufacturing process of the lower substrate 100, and may be prepared in advance through a preceding manufacturing process. Thereafter, the sealing layer 230 is used to seal the spacer 130 and the electrophoretic dispersion, and the upper substrate 200 and the lower substrate 100 are bonded together.

The common electrode 220 is formed of a transparent conductive material such as ITO and is formed in a plate shape corresponding to the entire pixel region. The sealing layer 230 may be formed by applying an adhesive material on the common electrode 220 and then imprinting or photolithography.

Meanwhile, the sealing layer 230 may be formed in a film type, and then the upper substrate 100 and the lower substrate 200 may be bonded together using a lamination process.

The joining of the upper substrate 200 and the lower substrate 100 may be performed through a pressurizing process to apply a predetermined pressure and an annealing process to apply a constant temperature together with the pressing process.

Next, referring to FIG. 23, a container 500 containing a plurality of charged particles 140 and a driving solvent 150 is prepared. Thereafter, the lower substrate 100 and the upper substrate 200 are vertically stacked and immersed in a driving solvent 150 contained in the container 500.

24, an electrophoretic dispersion liquid composed of a plurality of charged particles 140 and a driving solvent 150 charged in the positive (+) and negative (-) polarities is injected into the pixel region formed by the spacer 130 Fill.

More specifically, a cell gap is formed between the lower substrate 100 and the upper substrate 200 by the spacers 130. When the driving solvent 150 is contacted, The solvent 150 and the plurality of charged particles 140 are simultaneously filled.

The plurality of charged particles 140 are colored in black color and white color. The charged particles of the black color may be formed of a carbon black material, and the charged particles of white color may be formed of titanium oxide (TiO ₂ ).

The non-polar organic or non-polar inorganic material having a viscosity of 10 cP to 10 KcP may be applied to the driving solvent 150 so that the charged particles 140 can be moved by electrophoresis. The same solvent as the first and second embodiments may be applied to the driving solvent 150.

After the charging of the plurality of charged particles 140 and the driving solvent 150 into the pixel region between the lower substrate 100 and the upper substrate 200 is completed, Sealed with a sealant so that a plurality of the charged particles 140 and the driving solvent 150 do not flow out to the outside.

The method of manufacturing the electrophoretic display device according to the third embodiment of the present invention is characterized in that after the lower substrate 100 and the upper substrate 200 are attached together, the charged particles 140 and the driving solvent 150 And the panel is sealed immediately after the charging of the charged particles 140 and the driving solvent 150 is completed to prevent the driving solvent 150 from being volatilized.

As described above, the volatilization of the driving solvent 150 is suppressed, and the amount of the charged particles 140 and the driving solvent 150 filled in all the pixels can be uniformly maintained to prevent a change in characteristics.

When the charged particles 140 and the driving solvent 150 are filled in the state where the lower substrate 100 and the upper substrate 200 are bonded together and the charged particles 140 and the driving solvent 150 are filled in the active area ) Can be prevented from being overflowed and contaminated.

In addition, the electrophoretic dispersion liquid filling process may be performed by a screen printing method using a squeeze bar, a die coating method, a casting method, a bar coating method A bar coating method, a slit coating method, a dispense method, a squeezing method, or an inkjet printing method may be applied.

25 to 33 are views showing a manufacturing method of an electrophoretic display device according to a fourth embodiment of the present invention. Hereinafter, a method of manufacturing the electrophoretic display device according to the fourth embodiment of the present invention will be described with reference to FIGS. In the following description of the method of manufacturing an electrophoretic display device according to the fourth embodiment of the present invention, detailed description of the same contents as those of the first to third embodiments will be omitted.

Referring to FIG. 25, a plurality of pixel electrodes 120 are formed on a base substrate 110. At this time, the pixel electrode 120 may be formed of an opaque metal such as copper or aluminum, or may be formed of a conductive transparent material such as ITO or IZO.

Referring to FIG. 26, an organic material is coated on a lower base substrate 110 on which a pixel electrode 120 is formed, and then patterned to form a spacer 160 in a pixel region.

The spacers 160 are formed as stripe walls elongated in one direction (longitudinal direction in the drawing) to separate red pixels, green pixels, and blue pixels. At this time, the spacers 160 are formed to have a height of 10 μm to 100 μm to form cell gaps between the upper substrates 200 of the lower substrate 100.

27, a common electrode 220 and a sealing layer 230 are formed on an upper base substrate 210 to manufacture an upper substrate 200. At this time, the upper substrate 200 is manufactured separately from the manufacturing process of the lower substrate 100, and may be prepared in advance through a preceding manufacturing process. Thereafter, the sealing layer 230 is used to seal the spacer 130 and the electrophoretic dispersion, and the upper substrate 200 and the lower substrate 100 are bonded together.

Materials and manufacturing methods of the upper base substrate 210, the common electrode 220, and the sealing layer 230 shown in FIG. 27 are the same as those of the electrophoretic display device according to the above-described embodiment.

Subsequently, an electrophoretic dispersion liquid composed of a plurality of charged particles and a solvent charged in the positive (+) and negative (-) polarities is filled in the pixel region formed by the spacer 160. At this time, the filling of the electrophoretic dispersion liquid is sequentially performed for the colors to be displayed by the pixels.

Referring to FIG. 28, a first container 510 containing a plurality of charged particles 170 colored with black color and red color and a driving solvent 150 is prepared.

Then, the first mask 610 having openings 612 for opening only the red pixels among all the pixels is aligned at one end of the lower substrate 100 and the upper substrate 200.

Subsequently, the lower substrate 100 and the upper substrate 200 are vertically stacked and immersed in a driving solvent 150 contained in the first container 510.

29, a cell gap is formed between the lower substrate 100 and the upper substrate 200 by the spacers 160. When the driving solvent 150 is contacted, all the red A driving solvent 150 and charged particles 170 of black color and red color are filled in the filling space of the pixel.

Here, the driving solvent 150 may be a non-polar organic material or a non-polar inorganic material having a viscosity of 10 cP to 10 KcP so that the charged particles 170 can be moved by electrophoresis.

Thereafter, when the driving solvent 150 and the charged particles 170 of the black color and the red color are filled in all the red pixel regions, the driving solvent 150 and the charged particles 170 flow outward in the red pixel region Seal both ends of the red pixels with a sealant so that they do not come out.

Next, referring to FIG. 30, a second container 520 containing a plurality of charged particles 170 colored with black color and green color and a driving solvent 150 is prepared.

Then, the second mask 620 having openings 622 for opening only the green pixels among all the pixels is aligned with one end of the lower substrate 100 and the upper substrate 200.

Thereafter, the lower substrate 100 and the upper substrate 200 are vertically stacked and immersed in a driving solvent 150 contained in the second container 520.

31, a cell gap is formed between the lower substrate 100 and the upper substrate 200 by a spacer 160. When the driving solvent 150 is contacted, all the green A driving solvent 150 and charged particles 170 of black color and green color are filled in the filling space of the pixel.

Here, the driving solvent 150 may be a nonpolar organic or nonpolar inorganic material having a viscosity of 10 cP to 10 KcP so that the charged particles 170 can be moved by electrophoresis, and the same solvent as the above- Can be applied.

Thereafter, when the driving solvent 150 and the charging of the black color and the charged particles 170 of the green color are completed in all the green pixel regions, the driving solvent 150 and the charged particles 170 flow to the outside in the green pixel region Seal both ends of the green pixels with a sealant so that they do not come out.

Next, referring to 32, a third container 530 containing a plurality of charged particles 170 colored with black and blue colors and a driving solvent 150 is prepared.

A third mask 630 having openings 632 for opening only blue pixels among all the pixels is formed on one end of the lower substrate 100 and the upper substrate 200.

Thereafter, the lower substrate 100 and the upper substrate 200 are vertically oriented and immersed in a driving solvent 150 contained in the third container 530.

Referring to FIG. 33, a cell gap is formed between the lower substrate 100 and the upper substrate 200 by a spacer 160. When the driving solvent 150 is contacted, all of the blue The space of the pixel is filled with the driving solvent 150 and the charged particles 170 of black color and blue color.

Here, the driving solvent 150 may be a non-polar organic material or a non-polar inorganic material having a viscosity of 10 cP to 10 KcP so that the charged particles 170 can be moved by electrophoresis.

Then, when the drive solvent 150 and the charged particles 170 of black color and blue color are completely filled in all the blue pixel regions, the driving solvent 150 and the charged particles 170 flow to the outside in the blue pixel region Seal both ends of the blue pixels with a sealant so that they do not come out.

The driving solvent 150 of the method of manufacturing an electrophoretic display device according to the fourth embodiment of the present invention may use the same materials as those of the first to third embodiments.

Here, the thicknesses of the first mask 610 to the third mask 630 are 20 占 퐉 to 40 占 퐉, and the hole sizes of the openings 612, 622, and 632 are 30 占 퐉 to 60 占 퐉. have.

The first mask 610 to the third mask 630 may be a metal mask made of nickel, an organic mask having the same material as the spacer 130, or an inorganic mask. On the other hand, a mesh mask may be used.

The electrophoretic dispersion liquid filling process composed of the plurality of charged particles 170 and the driving solvent 150 may be performed by a screen printing method using a squeeze bar or a die coating method using a squeeze bar, A die coating method, a casting method, a bar coating method, a slit coating method, a dispensing method, a squeezing method, a method or an inkjet printing method May be applied.

In the above description, the charged particles 170 are colored in red, green, blue, and black in the charging process. However, the present invention is not limited thereto, and the charged particles 170 may be colored in yellow, cyan, magenta, and white colors. Even in this case, the above-described manufacturing method can be applied in the same manner.

The method of manufacturing the electrophoretic display device according to the fourth embodiment of the present invention is characterized in that after the lower substrate 100 and the upper substrate 200 are attached to each other, And the substrate is sealed immediately after the charging of the charged particles 170 and the driving solvent 150 is completed to prevent the driving solvent 150 from being volatilized.

The manufacturing method of the electrophoretic display device according to the fourth embodiment of the present invention is such that the volatilization of the driving solvent 150 is suppressed to uniformly maintain the amount of the charged particles and the driving solvent 150 filled in all the pixels, Can be prevented.

The charged particles 170 and the driving solvent 150 are filled with the active particles 170 and the driving solvent 150 by filling the charged particles 170 and the driving solvent 150 in a state where the lower substrate 100 and the upper substrate 200 are bonded together. ) Can be prevented from being overflowed and contaminated.

In addition, it is possible to prevent uncharging and filling of the electrophoretic dispersion, thereby improving the display quality of the electrophoretic display device and securing the driving reliability.

In addition, it is possible to prevent defects due to uncharging and filling of the electrophoretic dispersion, thereby improving the mass productivity and manufacturing efficiency of the electrophoretic display device.

The manufacturing method of the electrophoretic display device according to the embodiments of the present invention has an advantage of being able to apply the manufacturing infra used in the manufacturing process of the conventional liquid crystal display device.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof.

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: lower base substrate
120: pixel electrode 130, 160: spacer
140, 170: charged particles 150: solvent
200: upper substrate 210: upper base substrate
220: common electrode 230: sealing layer
300, 310, 320, 330: masks 302, 312, 322, 332: openings
500, 510, 520, 530: containers 610, 620, 630: mask
612, 622, 632:

Claims (15)

delete delete delete delete delete Forming a plurality of pixel electrodes in each of a plurality of pixel regions defined in a lower substrate;
Forming a spacer having a predetermined height between the plurality of pixel electrodes;
Aligning a mask having an opening portion for opening a pixel to an upper portion of the spacer;
Filling charged particles colored with a specific color in the pixel region through the opening;
Attaching the upper substrate and the lower substrate on which the common electrode is formed;
Filling a pixel region filled with the charged particles with a driving solvent; And
And sealing the pixel region in which the charged particles and the driving solvent have been filled,
Wherein the mask is formed of the same material as the spacer, the thickness of the mask is 20 占 퐉 to 40 占 퐉,
Wherein the hole size of the opening is 30 mu m to 60 mu m. The method according to claim 6,
In the charging of the charged particles,
And filling the filling region with the charged particles in the pixel region. 8. The method of claim 7,
Further comprising the step of volatilizing a part or all of the filling solvent filled in the pixel region. The method according to claim 6,
The step of filling the pixel region filled with the charged particles with the driving solvent is characterized in that the upper substrate and the lower substrate are aligned in the longitudinal direction and then immersed in a container containing the driving solvent to fill the pixel region with the driving solvent Wherein the electrophoretic display device is a liquid crystal display device. Forming a plurality of pixel electrodes in each of a plurality of pixel regions defined in a lower substrate;
Forming a spacer having a predetermined height between the plurality of pixel electrodes;
Attaching the upper substrate and the lower substrate on which the common electrode is formed;
Aligning a mask having an opening for opening a pixel to one end of the upper substrate;
Filling the pixel region with charged particles colored with a specific color and a driving solvent through the opening; And
And sealing the pixel region in which the charged particles and the driving solvent have been filled,
Wherein the mask is formed of the same material as the spacer, the thickness of the mask is 20 占 퐉 to 40 占 퐉,
Wherein the hole size of the opening is 30 mu m to 60 mu m. 11. The method of claim 10,
The step of filling the charged regions of the pixel region with the colored particles and the driving solvent colored in the pixel region through the opening may be performed by vertically aligning the upper substrate and the lower substrate and then immersing the charged particles and the driving solvent in the containing container, And charging the charged particles and the driving solvent in the pixel region. 11. The method according to claim 6 or 10,
Wherein the charged particles are selectively colored in red color, green color, blue color, yellow color, cyan color, magenta color, black color and white color. delete 13. The method of claim 12,
Characterized in that, when the charged particles are colored with red color, green color, blue color and black color, charging of the charged particles and the driving solvent is sequentially performed on the red pixel region, the green pixel region and the blue pixel region, A manufacturing method of a mobile display device. 15. The method of claim 14,
The red pixel region, the green pixel region, and the blue pixel region, the red pixel region, the green pixel region, and the blue pixel region are sealed so that the driving solvent is not volatilized when the charging of the charged particles and the driving solvent is completed, respectively Wherein the electrophoretic display device is a liquid crystal display device.

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