KR101051513B1 - Electronic paper display device and manufacturing method thereof - Google Patents

Abstract

The present invention relates to an electronic paper display device and a method of manufacturing the same.

An electronic paper display device of the present invention, the lower electrode on the plate; Barrier rib structures formed on the lower electrodes; A twist ball injected into each cell formed by the partition wall of the partition structure; A spacer ball applied to the upper surface of the partition wall through a mask covered on the partition structure, and having a hardening agent aggregated around the partition wall; An upper electrode attached to an upper portion of the barrier rib structure while maintaining a predetermined distance from the upper end of the barrier rib by the spacer ball; And oil filled between the upper electrode and the lower electrode, and may maintain a uniform gap between the upper and lower electrodes, and may prevent spaced apart defects of the upper electrode on the partition structure when bending the electronic paper display device. There is an advantage to that.

Lower electrode, partition structure, partition wall, twist ball, upper electrode, hardener, oil, spacer ball

Description

Electronic paper display device and manufacturing method thereof

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic paper display device and a method of manufacturing the same, and more particularly, a spacer ball is disposed on a partition wall partitioned at regular intervals between upper and lower electrodes, and an upper electrode is formed by applying a curing agent around the spacer ball. The present invention relates to an electronic paper display device and a method of manufacturing the same, which can be attached to a partition at a constant height.

BACKGROUND With the development of technology related to displays, displays such as liquid crystal displays (LCDs), plasma display panels (PDPs), and organic electroluminescent devices (elector luminescence) are widely used.

Recently, the development of electronic paper display elements, called digital paper displays (DPDs), has been accelerated as the next-generation display devices following the aforementioned display devices, and electronic papers are flexible display devices. As an alternative to the aforementioned flat panel display device, it is in the spotlight.

The electronic paper display device is a flat-panel display device in which letters or images can be displayed by realizing the effect of ink by millions of twist balls or capsules injected between flexible substrates such as thin plastics. Since it does not require a backlight or continuous recharging, it can be driven with very little energy, so the energy efficiency is excellent.

In addition, since the electronic paper display device has a clear and wide viewing angle and a memory function in which displayed characters or images do not disappear completely even when the power supply is momentarily cut off, the electronic paper display element can be folded including print media such as books, newspapers or magazines. It is expected to be widely used in a wide range of fields such as screens and electronic wallpaper.

On the other hand, the technical method to implement the electronic paper display device is largely a liquid crystal method, an organic EL method, a reflective film reflective display method, an electrophoretic method, a twist ball method, an electrochromic method, a mechanical reflective display method, etc. The development is divided into.

Among these, the electronic paper display device using the twist ball has a dielectric liquid on the surface of the twist ball in arranging a plurality of twist balls having optical and electrical anisotropy between two parallel conductors, namely, the upper and lower substrates. And a twisted ball coated with a dielectric liquid are attached to an elastomer sheet to produce an electronic paper display device.

In this case, in the conventional electronic paper display device, the twisted ball is positioned between the lower and upper substrates to which the twisted ball is applied, and is rotated around the dielectric sheet on the elastomer sheet by the applied electric field, thereby being transparent or opaque. Due to the positional arrangement of the segments, text or image display is made.

However, the twist ball, which is rotationally driven by the electric field in the elastomer sheet, has a disadvantage in that a uniform arrangement is difficult because it is arranged in a line in an application manner on the elastomer sheet.

In other words, when arranged in an application manner on the elastomer sheet, the twist balls must be constantly arranged, but may not be arranged in line but arranged out of place.

In addition, if an electric field is applied to the upper and lower electrodes after the arrangement of the twist balls, as the twist balls are rotated and flow, stacking between the twist balls may occur, resulting in a decrease in contrast ratio.

Therefore, the conventional electronic paper display device using a twist ball has a problem that the manufacturing process becomes difficult and complicated as the twist ball is to be arranged uniformly or a separate spacer must be installed so that a constant distance is maintained between the upper and lower electrodes. There was this.

Accordingly, the present invention has been made to solve the above-mentioned disadvantages and problems in the conventional electronic paper display device, and arranged a spacer ball having a predetermined diameter on the partition wall partitioned at regular intervals, and a curing agent around the spacer ball. As the upper electrode and the partition wall can be attached at regular intervals as the coating is applied, the uniform gap between the upper and lower electrodes can be maintained, and the electrons can be prevented from being separated from the upper electrode during bending of the display device. It is an object of the invention to provide a paper display device and a method of manufacturing the same.

The object of the present invention, the lower electrode; Barrier rib structures formed on the lower electrodes; A twist ball injected into each cell formed by the partition wall of the partition structure; A spacer ball applied on the partition wall through a mask and having a curing agent aggregated around the partition wall; An upper electrode attached to an upper portion of the barrier rib while maintaining a predetermined distance from an upper end portion of the barrier rib by the spacer ball; An electronic paper display device including an oil filled between the upper electrode and the lower electrode is provided.

The lower electrode is composed of a thin plate-like substrate having conductivity, and the partition structure is provided in various patterns on the top. The partition structure has a plurality of cells divided through partitions of various shapes in a state where the upper surface and both side portions thereof are open.

In addition, the barrier rib structure may be manufactured by an imprint process through a roll stamp, and a cell having various types of barrier ribs may be formed by a roll stamp made of a thermosetting resin or a UV curable resin.

Meanwhile, twist balls divided into transparent or opaque segments are injected into each cell of the barrier rib structure. The twist ball is applied to the upper portion of the partition structure and then injected into each cell through a squeeze method, and in this case, the squeeze method may be repeated several times to increase the filling rate of the twist ball.

An upper electrode is attached to an upper portion of the barrier rib structure, and the upper electrode may be attached with a spacer ball interposed therebetween so as to form a predetermined gap with an upper end of the barrier rib structure.

The spacer balls are individually arranged through a mask in which a plurality of pattern holes are formed at the upper end of each partition wall of the partition structure, and a curing agent acting as an adhesive is applied to the upper surface of the partition wall to form a predetermined gap with the partition structure. Make sure

At this time, the curing agent is preferably used UV curing agent.

The upper electrode is preferably composed of a transparent electrode (ITO) so that light can be transmitted and reflected or absorbed through the transparent or opaque segment of the twist ball.

Meanwhile, oil of viscous liquid is injected between the upper electrode and the lower electrode to fill the upper and lower electrodes so that the twist ball can be rotated by an electric field in each cell of the partition structure. In addition, the twist ball may maintain a constant distance from the upper and lower electrodes due to the weight difference.

The oil may be filled through an oil inlet formed by exposing portions of both sides of the barrier rib structure, and may be filled without bubbles between upper and lower electrodes in various ways including a vacuum injection method, and when the oil filling is completed, the oil inlet Is sealed.

Another object of the present invention is the step of applying a resin layer on the lower electrode on the plate, forming a partition structure consisting of a plurality of cells separated by the partition wall on the resin layer, and a twist ball inside the cell of the partition structure Injecting a spacer, arranging a spacer ball through a mask in which a pattern hole is formed on an upper surface of each partition wall of the partition structure, and forming a predetermined gap with the partition structure to attach an upper electrode to an upper portion of the spacer ball. ; And it is achieved by providing a method for manufacturing an electronic paper display device comprising the step of injecting oil on the partition structure between the upper and lower electrodes.

In this case, the method further includes applying a curing agent to a lower surface of the upper electrode before the upper electrode is spaced apart by the spacer ball and attached to the partition structure.

In addition, after the step of attaching the upper electrode spaced apart by the spacer ball on the partition structure, further comprising the step of irradiating UV to allow the curing agent applied to the lower surface of the upper electrode to melt, by UV irradiation The molten hardener flows around the spacer balls by surface tension to bond and secure the upper electrode and the partition structure.

The resin layer applied on the lower electrode may be formed of a thermosetting resin or a UV curable resin, and is formed as a barrier rib structure having a plurality of cells in an imprint method through a roll stamp on the conductive lower electrode.

At this time, it is preferable that the pressing surface of the roll stamp is easy to be released from the resin layer by being released.

The oil injected between the upper and lower electrodes is preferably composed of a liquid material having a specific gravity equal to or lower than the specific gravity of the twisted ball so that the twisted ball can be suspended in the oil.

As described above, in the electronic paper display device according to the present invention, the upper electrode is attached to the partition structure by a spacer ball to be spaced apart by a predetermined interval, thereby maintaining a uniform gap between the upper and lower electrodes, and the electronic paper display. The bending of the device has an advantage of preventing the separation of the upper electrode on the partition structure can be prevented.

In addition, the present invention has the advantage that the upper electrode can be spaced apart while minimizing the influence on each twist ball inserted into the partition structure as the spacer ball is arranged in each partition wall of the partition structure using a mask.

The matters relating to the operational effects including the technical configuration for the above object of the electronic paper display device and its manufacturing method according to the present invention will be clearly understood by the following detailed description with reference to the drawings showing preferred embodiments of the present invention.

First, Figure 1 is a cross-sectional view of the electronic paper display device according to the present invention.

As shown, the electronic paper display device 100 according to the embodiment of the present invention includes a lower substrate 110 on a plate, a partition structure 120 formed on the lower substrate 110, and each of the partition structure 120. A twist ball 130 injected into the cell 121, a spacer ball 160 individually arranged on each partition wall structure 120, and an upper end of the partition wall structure 120 and a predetermined portion on the spacer ball 160. The upper electrode 140 and the upper and lower electrodes 140 and 110 which are spaced apart from each other are injected into the oil 150.

The lower substrate 110 is formed of a conductive substrate such as Cu, Au, and the partition structure 120 is divided into a plurality of cells 121 by the partition wall 122 formed at a predetermined interval on the upper portion of the predetermined thickness. Is formed.

The partition structure 120 is separately injected with a twist ball 130 divided into a transparent segment 131 and an opaque segment 132 inside each cell 121 divided by the partition wall 122. In this case, the partition wall 122 may be formed as a partition wall having various shapes and heights that can prevent the twist ball 130 from moving to the neighboring cells 121, and preferably cross the center portion It is preferable that the barrier rib is formed in the shape of a).

In addition, the partition wall 122 formed in the partition structure 120 is formed to have a height of approximately 50 to 110 μm so that the twist ball 130 injected into each cell 121 does not move to the neighboring cell 121. Preferably, the inner width of each cell 121 may be 50 to 100 μm, and the width of the partition wall 122 may be 20 to 30 μm.

In addition, the barrier rib structure 120 may be formed of the barrier rib 122 and the cell 121 using an imprint method. In the present embodiment, the barrier rib 122 is formed using a roll stamp or injection molding method. ) And a pattern shape of the cell 121 may be formed.

The barrier rib structure 120 is configured in such a way that the oil inlet 123 formed on the upper surface and a part of both sides thereof is open, and a plurality of twist balls 130 are applied to the upper surface to each cell 121 by a squeeze method. Twist ball 130 is injected separately.

At this time, the twist ball 130 injected into each cell 121 of the partition structure 120 may repeat the squeeze process several times to increase the filling rate of the twist ball 130 injected into each cell 121. It is preferable to.

Meanwhile, spacer balls 160 having a diameter of approximately 5 to 30 μm are individually disposed at upper ends of each of the partition walls 122 constituting the partition structure 120.

Spacer balls 160, and an array using the mask 200, having a spacing a plurality of pattern holes 210 of the shape as shown in FIG. 3 to arrange a fixed position on the top surface of each partition wall 122 or the like, the spacer By dispersing the balls 160 in the IPA (?) And arranging them through the mask 200, the IPA (?) Is removed, thereby allowing the spacer balls 160 to be attached to the upper surface of the partition wall 122 with adhesive force. .

At this time, the spacer ball 160 may be arranged in a group of one or more spacer balls 160 in consideration of the support force of the upper electrode 140 coupled to the upper portion.

An upper electrode 140 is attached to an upper portion of the partition structure 120 in which the spacer balls 160 are arranged, and the upper electrode 140 is each partition wall 120 of the partition structure 120 through the spacer ball 160. ) Is spaced apart from the upper end by a predetermined interval.

At this time, the upper end of each partition wall 120 and the upper electrode 140 may be bonded by a curing agent 141 applied in a form surrounding the spacer ball 160, the curing agent 141 is the upper electrode 140 In the state of being coated with a predetermined thickness on the lower surface of the melted by the irradiation of ultraviolet rays to be able to aggregate around the spacer ball 160. Therefore, the curing agent 141 is preferably composed of a UV curing agent capable of melting and curing by UV irradiation.

The upper electrode 140 is composed of a transparent electrode (ITO), the external light is transmitted through the transparent upper electrode 140 and reflected through the transparent segment 131 or the opaque segment 132 of each twist ball 130 Or a combination of light reflected or absorbed by the twist ball 130 so that a character or an image can be displayed to the outside through the upper electrode 140.

At this time, the positive electrode and the negative electrode are connected to the upper and lower electrodes 140 and 110, respectively, so that an electric field is generated by applying a voltage to each of the electrodes 140 and 110. As the twist ball 130 injected into each cell 121 of the barrier rib structure 120 is rotated by the electric field generated between the electrodes 140 and 110, the light reflection and the light absorption by the twist ball 130 are reduced. Will be done.

Meanwhile, the twist ball 130 filled in the barrier rib structure 120 between the upper and lower electrodes 140 and 110 is rotated through an electric field, and each cell 121 of the barrier rib structure 120 is rotated. Rotation is made in each cell 121 by the medium of the oil 150 filled in the medium.

The oil 150 is composed of a liquid material having some viscosity and specific gravity. A liquid material capable of light conversion of a liquid and having a lubricating component, that is, a liquid material such as Dow corning 10 or Centistoke 200 is used.

The oil 150 may be injected through the oil injection holes 123 formed on both sides of the barrier rib structure 120, and a vacuum injection method in a vacuum chamber is mainly adopted between the upper and lower electrodes 140 and 110. It can be filled without bubbles. The oil inlet 123 is sealed after oil injection is completed, and since the oil 150 is injected after attaching the upper electrode 140 to the partition structure 120, the partition structure 120 and the upper electrode 140 Since there is no residual oil on the attaching surface, the bonding reliability of the upper electrode 140 may be improved.

In the electronic paper display device 100 of the present embodiment configured as described above, the individual twist balls 130 are formed in each cell through the partition wall 122 of the partition structure 120 provided between the upper and lower electrodes 140 and 110. 121, the twist balls 130 are positioned in the oil 150 filled in the cells 121 between the upper and lower electrodes 140 and 110, respectively, and thus, the upper and lower electrodes 140. The twist ball 130 may be rotated using the oil 150 as a medium by an electric field generated when the voltage of 110 is applied.

At this time, the twist ball 130 is suspended by maintaining a constant interval with the upper and lower electrodes 140, 110 through the oil 121 filled in each cell 121 and the upper portion of the partition structure 120 ( 유지) and is rotated by the electric field generated between the upper and lower electrodes 140 and 110 so that the transparent or opaque segments 131 and 132 are positioned toward the upper electrode 140 so that each twist ball ( The rotation combination of 130 enables character or video display.

In addition, the barrier rib structure 120 and the upper electrode 140 stacked on and coupled to the upper part are spaced apart by the spacer ball 160 by a predetermined interval, so that the upper electrode 140 when bending the upper and lower electrodes 140 and 110. There is a technical feature to ensure that free banding force is ensured.

Meanwhile, a method of manufacturing an electronic paper display device having the above technical configuration will be described with reference to FIGS. 2 to 8 as shown below.

2 is a plan view after the twist ball is inserted in the electronic paper display device manufacturing process according to the present invention, Figure 3 is a plan view of a mask employed in the electronic paper display device manufacturing process according to the present invention, Figure 4 is an electron according to the present invention Fig. 5 is a side view of the spacer ball arrangement using a mask after the spacer ball arrangement in the manufacturing process of the paper display device.

In addition, Figure 6 is a side view after mounting the upper electrode of the electronic paper display device manufacturing process according to the present invention, Figure 7 is a side view after attaching the upper electrode of the electronic paper display device manufacturing process according to the present invention, Figure 8 Side view after the oil injection of the electronic paper display device manufacturing process according to.

As shown, the electronic paper display device of the present embodiment first prepares a lower electrode 110 composed of a thin plate-like substrate, and then applies a resin layer on the lower electrode 110 to a predetermined thickness.

At this time, the resin layer may be composed of a thermosetting resin or UV curable resin, the thickness thereof when the partition wall 122 is formed, the twist ball 130 does not flow through the partition wall 122 and at the edge portion When the upper electrode 140 is attached, the twist ball 130 is preferably formed to a thickness that can be injected into the partition structure 120 without interfering with the upper electrode 140.

The resin layer is formed of a barrier rib structure 120 formed of a plurality of cells 121 separated by the barrier ribs 122. The barrier rib structure 120 is not separately illustrated in the drawings, but using an imprint method using a roll stamp. Alternatively, it may be formed by injection molding.

The partition structure 120 may have a shape of the partition wall 122 according to a stamp shape or a molding of a roll stamp, and as shown in FIG. 2 or 4, the rotation of the partition ball 120 may be driven only within a limited space. Preferably, the cell 121 may be formed through the bulkhead 122 having a cross shape.

In addition, when the partition 122 and the cell 121 are formed, each cell 121 has a size of a cube having a width of 100 × 100 μm or more and a depth of 100 μm or more in an open state. Preferably, the concentricity of the twist ball 130 filled in the 121 is maintained within 5 μm.

Next, when the barrier rib structure 120 is formed on the lower electrode 110, the twist ball 130 is individually filled in each cell 121 of the barrier rib structure 120.

The twist ball 130 is applied on the partition structure 120 when the lower electrode 110 formed with the partition structure 120 is horizontally transported as shown in FIG. 2, and through the squeeze along with the transfer of the partition structure 120. The twist ball 130 may be injected into each cell 121 of the barrier rib structure 120.

In this case, the filling rate of the twist ball 130 injected into each cell 121 of the barrier rib structure 120 may be increased by repeatedly transferring the squeeze on the barrier rib structure 120.

When the filling of the twist ball 130 is completed in each cell 121 of the barrier rib structure 120, the mask having a pattern hole 210 is provided on the barrier rib structure 120 at regular intervals as shown in FIG. 3. 200).

The mask 200 is covered so that a plurality of pattern holes 210 are located at the center of the upper surface of each partition wall 122 of the partition wall structure 120, and the spacer balls 160 are formed through the pattern hole 210 of the mask 200. This insertion allows the spacer ball 160 to be positioned at the center of the upper surface of each partition wall 122.

At this time, the spacer ball 160 is arranged through the pattern hole 210 of the mask 200 after dispersing in the IPA, and then removes the IPA, thereby being temporarily bonded to the upper surface of each partition wall 120 with a predetermined adhesive force. Position fixing of the spacer ball 160 is made.

In addition, although one spacer ball 160 is arranged at the center of each partition wall 122 in the embodiment, the spacer ball 160 has a bearing force of the upper electrode 140 seated on the spacer ball 160. In order to secure the plurality of spacer balls 140 may be arranged in a grouped on each partition wall 122.

Next, the upper electrode 140 is seated on the partition wall structure 120 so as to be spaced apart at intervals corresponding to the diameter of the spacer ball 160, wherein the upper electrode 140 has a predetermined thickness, approximately 1, on the lower surface thereof. It is seated on the spacer ball 160 in the state that the curing agent 141 is applied to a thickness of ˜5㎛.

After the upper electrode 140 is seated, ultraviolet rays (UV) are irradiated at a predetermined point adjacent to the upper electrode 140 so that the curing agent 141 applied to the lower surface of the upper electrode 140 may be melted.

In this case, the curing agent 141 is melted and agglomerated around the spacer ball 160 at the same time by the surface tension that may be generated around the lower surface of the upper electrode 140 and the spacer ball 160, and around the spacer ball 160. In the aggregated curing agent 141 is cured again to act as an adhesive medium for adhesively fixing the upper electrode 140 and the upper end of each partition 122.

As such, when the upper electrode 140 is attached to the partition structure 120 by the spacer ball 160 at a predetermined interval, only the twist ball 130 may be formed between the upper and lower electrodes 140 and 110. 121. As the upper electrode 140 is bonded in the state filled inside, contamination of the upper surface of the partition structure 120 may be prevented, and reliability of the upper electrode 140 may be secured.

Next, when the twist ball 130 is sealed by the upper and lower electrodes 140 and 110 with the partition structure 120 interposed therebetween, the partition structure 120 through the oil inlet 123 of the partition structure 120. Oil 150 is injected into the top of each cell and into each cell 121.

The oil 150 may be injected through an oil inlet 123 formed on one side or both sides of the barrier rib structure 120, and the oil 150 may be completely filled in the upper and lower electrodes 140 and 110. It is preferred to be injected by means of filling in a vacuum state.

That is, after the electronic paper display elements sealed by the upper and lower electrodes 140 and 110 are placed in the vacuum chamber, and the vacuum chamber is maintained in a vacuum state, the oil inlet 123 is positioned in the oil 150. When inert gas such as argon (Ar) is injected into the vacuum chamber and pressurized, the oil 150 may be injected through the oil inlet 123 by a pressure difference.

At this time, in the present embodiment, the method for filling the oil 150 without bubbles between the upper and lower electrodes 140 and 110 is adopted by a method that can be filled by a pressure difference using a vacuum chamber. As for the oil injection method, a method in which the oil 150 is injected between the upper and lower electrodes 140 and 110 in various ways may be adopted.

In addition, the twist ball 130 is positioned in a floating state in the oil 150 inside each cell 121 through the oil 150 injected between the upper and lower electrodes 140 and 110. When the voltage is applied to the upper and lower electrodes 140 and 110, the inside of the cell 121 is rotated by the oil 150 as a medium.

Therefore, in order to allow the twist ball 130 to float in the oil 150 at regular intervals with the upper and lower electrodes 140 and 110, the specific gravity of the oil 150 is equal to that of the twist ball 130. It would be desirable to consist of a liquid material having a specific gravity equal to or lower than the specific gravity.

Preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and various substitutions, modifications, and changes within the scope without departing from the spirit of the present invention for those skilled in the art to which the present invention pertains. It will be possible, but such substitutions, changes and the like should be regarded as belonging to the following claims.

1 is a cross-sectional view of an electronic paper display device according to the present invention.

Figure 2 is a plan view after the twist ball insertion of the electronic paper display device manufacturing process according to the present invention.

3 is a plan view of a mask employed in the electronic paper display device manufacturing process according to the present invention.

Figure 4 is a process diagram after the spacer ball arrangement of the electronic paper display device manufacturing process according to the present invention.

FIG. 5 is a side view of the spacer ball array using a mask taken along the line II ′ of FIG. 4. FIG.

Figure 6 is a side view after mounting the upper electrode of the electronic paper display device manufacturing process according to the present invention.

7 is a side view after attaching the upper electrode of the electronic paper display device manufacturing process according to the present invention.

Figure 8 is a side view after the oil injection of the electronic paper display device manufacturing process according to the present invention.

<Explanation of symbols for the main parts of the drawings>

110. Lower electrode 120. Partition structure

122. Bulkhead 130. Twist Ball

140. Upper electrode 141. Curing agent

150. Oil 160. Spacer Ball

Claims (10)

A lower electrode having an upper surface and a portion of both sides of which is open with an oil injection hole; Barrier rib structures formed on the lower electrodes; A twist ball injected into each cell formed by the partition wall of the partition structure; A spacer ball applied to the upper surface of the partition wall through a mask covered on the partition structure, and having a hardening agent aggregated around the partition wall; An upper electrode attached to an upper portion of the barrier rib structure while maintaining a predetermined distance from the upper end of the barrier rib by the spacer ball; Oil filled between the upper electrode and the lower electrode; Electronic paper display device comprising a. The method of claim 1, The lower electrode is an electronic paper display device composed of a thin plate-like substrate having conductivity. The method of claim 1, An electronic paper display device in which twist balls divided into transparent or opaque segments are injected one by one through a squeeze method in each cell of the barrier rib structure. The method of claim 1, The spacer balls may be individually arranged through masks having a plurality of pattern holes formed at equal intervals at upper ends of each partition wall of the partition structure, and the pattern holes may have a diameter of 1 to 5 μm. The method of claim 1, The curing agent is an electronic paper display device composed of a UV curing agent that is melted or cured by ultraviolet irradiation. The method of claim 1, The upper electrode is an electronic paper display device comprising a transparent electrode (ITO) so that light is transmitted through the transparent or opaque segment of the twist ball to be reflected or absorbed. The method of claim 2, The oil is filled through the oil inlet, the electronic paper display device comprising a lubricating component having a viscosity and specific gravity is composed of a liquid material capable of light conversion. Applying a resin layer over the lower electrode on the plate; Forming a barrier rib structure including a plurality of cells separated by the barrier rib on the resin layer; Injecting a twist ball into a cell of the barrier rib structure; Arranging spacer balls through a mask in which a pattern hole is formed on an upper surface of each partition wall of the partition structure; Forming an upper electrode on the spacer ball by forming a predetermined gap with the barrier rib structure; And Injecting oil on the barrier rib structure between the upper and lower electrodes; Method of manufacturing an electronic paper display device comprising a. The method of claim 8, The method of manufacturing an electronic paper display device further comprising applying a curing agent to a lower surface of the upper electrode before the upper electrode is spaced apart from the spacer ball and seated on the partition structure. The method of claim 8, After the upper electrode is spaced apart by a spacer ball and seated on the partition structure, the method of manufacturing an electronic paper display device further comprising the step of irradiating UV to melt the curing agent applied to the lower surface of the upper electrode. .

Images