KR101273728B1 - electronic paper display device and method for manufacturing the same - Google Patents

Abstract

The present invention relates to an electronic paper display device, wherein the electronic paper display device according to an embodiment of the present invention is disposed on the same plane to the outside color through the space between the rotating balls and the rotating balls to express the color to the outside An auxiliary color expressing body, wherein the auxiliary color expressing body is moved between a first position opposite the area between the rotating balls and a second position opposite the rotating balls.

Description

Electronic paper display device and method for manufacturing the same

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic paper display device and a manufacturing method thereof, and more particularly, to an electronic paper display device and a method of manufacturing the same, which have improved color reproducibility, sharpness, and reflectance characteristics.

Among the next generation display devices, the electronic paper display device has greater availability and flexibility than other display devices, and may be driven at low power. Accordingly, the electronic paper display device can replace paper printing media such as books, and can be applied to other various kinds of screens and electronic wallpaper.

Currently, there is a twisted ball type electronic paper display device using a rotating ball made of hemispheres of different colors as a representative electronic paper display device. The twisted ball type electronic paper display device includes a plurality of rotating balls, a partition structure for partitioning the rotating balls, an electrode structure for rotating the rotating balls, and a transparent insulating oil for providing lubricity to the rotating balls. Equipped. In the electronic paper display device having such a structure, an electrode structure applies a voltage to the rotating balls to rotate the rotating balls, thereby expressing a color to the outside.

However, in the electronic paper display device having the above structure, since each of the rotating balls has a sphere shape, the space between the rotating balls becomes a rectangular region of the color expression in which the color is not expressed. This rectangular area is limited in improving the color reproducibility, sharpness, and reflectance of the electronic paper display device.

In addition, in the conventional electronic paper display device, the color is expressed to the outside by the selective rotation of the rotating balls, but it was difficult to precisely adjust the brightness and saturation of the expressed color. In particular, when the color is expressed only by the rotating balls arranged on the same plane as described above, there is a limit in selectively increasing or decreasing the brightness and saturation of the expressed color.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide an electronic paper display device having a structure in which color blindness, in which color is not expressed between rotating balls, is reduced, thereby improving color reproducibility, sharpness, and reflectance.

SUMMARY OF THE INVENTION An object of the present invention is to provide an electronic paper display device capable of selectively increasing or decreasing saturation and lightness.

SUMMARY OF THE INVENTION An object of the present invention is to manufacture an electronic paper display device having a structure that improves color reproducibility, sharpness, and reflectance by reducing a rectangular area in which color is not expressed between rotating balls.

An object of the present invention is to provide a method for manufacturing an electronic paper display device that can selectively increase or decrease saturation and lightness.

The electronic paper display device according to the present invention includes rotating balls that are disposed on the same plane to express colors to the outside and an auxiliary color expressing body to express colors to the outside through a space between the rotating balls. An auxiliary color representation is moved between a first position opposite the area between the rotating balls and a second position opposite the rotating balls.

According to an embodiment of the present invention, the auxiliary color expression body may include rotating balls having a smaller size than the rotating balls.

According to an embodiment of the present invention, each of the rotating balls is made of hemispheres having different colors from each other, and the auxiliary color expression body may include rotating balls having one color.

According to an embodiment of the present invention, the barrier rib structure further partitions the auxiliary color representations in a lateral direction, wherein the barrier rib structure is made of a transparent material having light transmission, and the auxiliary color representations form the barrier structure. Through this, colors can be expressed to the outside.

An electronic paper display device according to the present invention has a lower structure having a first partition wall structure for partitioning first rotating balls laterally and an upper portion of the lower structure and having a larger size than the first rotating balls. And an upper structure having a second partition wall structure that partitions second rotating balls laterally, wherein the first partition wall extends from an area opposite the second rotating balls to an area between the second rotating balls. Trench-shaped cavities may be included.

According to an embodiment of the present invention, the lower structure includes a first plate coupled to the first barrier rib structure, and the upper structure includes a second plate coupled to the second barrier rib structure, wherein the first plate The second plate may be used as an electrode for applying a voltage to the first rotating balls and the second rotating balls.

According to an embodiment of the present invention, the first rotating balls are provided to move between a first position opposite the rotating balls along the first cavities and a second position opposite the area between the rotating balls along the first cavities, The first plate and the second plate are selectively mounted to the first rotating balls and the second rotating balls such that the first rotating balls are moved between the first position and the second position along the first cavities. Voltage can be applied.

According to an embodiment of the present invention, the second rotating balls are arranged to form a zigzag shape in a planar manner, and when the first rotating balls are positioned at the first position, the three rotating balls are adjacent to the center of the first rotating balls. It may be arranged so as to coincide with the center of the three rotating balls.

According to an embodiment of the present invention, each of the first rotating balls is made of one color, and each of the second rotating balls has a second hemisphere having a different charge value compared to the first hemisphere and the first hemisphere. Wherein the first hemisphere consists of black, white, red, green, blue, cyan, magenta, and yellow The second hemisphere is any one of black, white, red, green, blue, cyan, magenta, and yellow. It may be another one.

According to an embodiment of the present invention, the spacer may further include a spacer disposed between the lower structure and the upper structure to maintain a gap between the lower structure and the upper structure at a predetermined interval.

Method of manufacturing an electronic paper display device according to the present invention comprises the steps of manufacturing a lower structure having a first rotating ball, manufacturing an upper structure having a second rotating ball having a larger size than the first rotating ball, And combining the lower structure and the upper structure, wherein the manufacturing of the lower structure includes preparing a first plate, forming a first insulating film on the first plate, and forming a first insulating film on the first insulating film. Forming trench-shaped first cavities extending from an area facing the second rotating balls to an area between the second rotating balls, and placing the first rotating balls in the first cavities. And positioning.

According to an exemplary embodiment of the present disclosure, the manufacturing of the upper structure may include preparing a second plate, forming a second insulating film on the second plate, and removing a portion of the second insulating film. The second rotating balls may be positioned to form second cavities having a larger size than the first cavities.

According to an embodiment of the present invention, the first plate and the second plate may be used as an electrode for applying a voltage to the first and second rotating balls.

According to an embodiment of the present invention, the combining of the lower structure and the upper structure may include forming a spacer on at least one of the lower structure and the upper structure, and using the spacer as a stopper. The method may include contacting the upper structure to a lower structure.

According to an embodiment of the present invention, the manufacturing of the upper structure may include forming a second partition structure that partitions the second rotating balls laterally, and the forming of the spacer may include displaying the electronic paper. The method may include forming an insulator having a thickness thicker than that of the second partition structure in a region other than the pixel region of the device.

According to an embodiment of the present invention, the step of manufacturing the upper structure comprises the steps of preparing a second plate, forming a second partition structure for partitioning the second rotating balls on the second plate, Forming an adhesive on the second cavities, and adhering the second rotating balls to the second cavities using the adhesive.

According to an embodiment of the present invention, the insulating oil may be used as the adhesive.

The electronic paper display device according to the present invention allows the rotating balls arranged on the other plane to selectively express the color of the rectangular area of the color representation of the rotating balls arranged on one plane, so that the color reproduction rate, the contrast ratio, and the reflectance Can improve.

The manufacturing method of the electronic paper display device according to the present invention allows the rotating balls arranged on the other plane to selectively color the rectangular region of the color representation of the rotating balls arranged on any one plane, so that the color reproducibility and contrast ratio In addition, an electronic paper display device having improved reflectance can be manufactured.

1 is a plan view illustrating a schematic ball arrangement of an electronic paper display device according to an exemplary embodiment of the present invention.
FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.
3 and 4 are views for explaining a process of operating the first rotating balls of the electronic paper display device according to an embodiment of the present invention.
5 is a flowchart illustrating a manufacturing method of an electronic paper display device according to an exemplary embodiment of the present invention.
6A through 6D are diagrams for describing a manufacturing process of an electronic paper display device according to an exemplary embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The embodiments may be provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. Like reference numerals refer to like elements throughout the specification.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. It is to be understood that the terms 'comprise', and / or 'comprising' as used herein may be used to refer to the presence or absence of one or more other components, steps, operations, and / Or additions.

Hereinafter, an electronic paper display device and a manufacturing method thereof according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a plan view illustrating a schematic ball arrangement of an electronic paper display device according to an exemplary embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line II ′ of FIG. 1.

1 and 2, the electronic paper display device 100 according to an embodiment of the present invention may include a lower structure 110, an upper structure 120, a spacer 130, and an insulating oil 144. Can be.

The lower structure 110 may include a first plate 112, a first partition wall structure 114, and an auxiliary color expression means (hereinafter, referred to as first rotating balls) 116. The first plate 112 may be a base substrate for supporting the first partition wall structure 114 and the first rotating balls 116. The first plate 112 may be made of a metal material. In this case, the first plate 112 may be used as an electrode for rotating the first rotating balls 116.

The first partition wall structure 114 may support and partition the first rotating balls 116 on the first plate 112. The first barrier rib structure 115 may be an insulation pattern covering the first plate 112, and the insulation pattern may have first cavities 114a in which the first rotating balls 116 are positioned. have. The first cavities 114a may have an open shape toward the upper portion of the lower structure 110. In addition, the first cavities 114a may have a trench shape extending in the lateral direction.

Each of the first rotating balls 116 may be configured to have any one color. For example, each of the first rotating balls 116 may have any one selected from black and white. As another example, each of the first rotating balls 116 may be any one selected from red, green, blue, cyan, magenta, and yellow. Can have

The upper structure 120 may include a second plate 122, a second partition wall structure 124, and a main color expression unit 126. The second plate 122 may be a base substrate for supporting the second partition wall structure 124 and the main color expression means 126. The second plate 122 may be made of a metal material. In this case, the second plate 122 may be used as an electrode for rotating the main color expression means 126. The second plate 122 may be formed of a material having high light transmittance. More specifically, the colors of the first rotating balls 116 and the main color expression means 126 may be displayed to the outside through the upper structure 120. Accordingly, the second plate 122 may be formed of a transparent material having high light transmittance such that the color expression efficiency of the first rotating balls 116 and the main color expression means 126 is not degraded. Can be. The second plate 122 may be a glass substrate. In this case, together with the first plate 112, an electrode for applying a voltage to the first rotating balls 116 and the main color expression means 126 is provided separately on the second plate 122. Can be.

The second partition wall structure 124 may support and partition the main color expression means 126 on the second plate 122. The second barrier rib structure 126 may be an insulation pattern covering the second plate 122, and the insulation pattern may have second cavities 124a in which the auxiliary color expression means 126 is located. . The second cavities 124a may have a pillar shape that is open toward the upper portion of the lower structure 110.

The main color expressing means 126 may be a component for expressing a color to the outside through the second plate 122. For example, the main color representing means 126 may have rotating balls having a larger size than the first rotating balls 116. As an example, each of the main color expressing means (hereinafter, the second rotating balls 126) may have a sphere shape including a first hemisphere 126a and a second hemisphere 126b. The first hemisphere 126a and the second hemisphere 126b may have different colors. As an example, the second hemisphere 126a may be black, white, red, green, blue, cyan, magenta, and yellow ( yellow, and the second hemisphere 126b is black, white, red, green, blue, cyan, magenta, And another one of yellow. In addition, the charge value of the first hemisphere 126a and the charge value of the second hemisphere 126b may be provided to be different. As an example, the first hemisphere 126a and the second hemisphere 126b may be electrified with different charges. As another example, only one of the first hemisphere 126a and the second hemisphere 126b may be selectively charged such that the charge values of the first hemisphere 126a and the second hemisphere 126b are different. have.

Meanwhile, the first rotating balls 116 may express colors to the outside through the space between the second rotating balls 126. For example, the second rotating balls 126 may be arranged in a plane such that the color of the electronic paper display device 100 occupies most of the color expression area. To this end, the second rotating balls 126 may be arranged to have a zigzag arrangement. Accordingly, the second rotating balls 126 are main rotating balls for expressing colors and may express external colors. However, since the second rotating balls 126 have a spherical shape, even if the second rotating balls 126 are placed in close contact with each other, an empty space is generated between the second rotating balls 126. The empty space becomes a rectangular region of the color representation in which no color is expressed by the second rotating balls 126. Therefore, the first rotating balls 116 may be disposed in the space between the second rotating balls 126 to express the color to the outside through the rectangular region of the color expression. As an example, the centers of the first rotating balls 116 may be arranged to coincide with the center of the triangle 10 connecting the center points of the three adjacent second rotating balls 126. In this case, the first rotating balls 116 may be disposed to face the second partition wall structure 124.

In addition, each of the first rotating balls 116 may have a first position 10 opposite to the second rotating balls 126 and a second position opposite to an area between the second rotating balls 126. 20) may be provided to be movable between each other. The first position 10 may display the colors of the first rotating balls 116 to the outside through an area between the first rotating balls 116 and the second rotating balls 126. It may be the position of the first rotating balls 116. The first position 10 may be a position of the first rotating ball 116 where the center of the first rotating ball 116 and the center of the triangle 10 coincide with each other. The second position 20 may be covered by the first rotating balls 116 by the second rotating balls 126, so that the colors of the first rotating balls 116 may not be displayed to the outside. It may be the position of the first rotating balls 116. For the reciprocating movement of the first rotating balls 116 as described above, the first cavities 114a of the first partition wall structure 114 may be formed from an area facing the second rotating balls 126. The second rotating balls 126 may have a trench shape extending to a region opposite to the region. Accordingly, the first rotating balls 116 may be linearly reciprocated along the first cavities 114a to be selectively positioned at the first position 10 and the second position 20. .

In addition, the first rotating balls 116 may be preferably sized to have a smaller diameter than the second rotating balls 126. More specifically, as the sizes of the first rotating balls 116 increase, colors may be expressed in more areas of the color blind spots, thereby improving color clarity of the electronic paper display device 100. . However, when the size of the first rotating balls 116 is the same as or larger than the size of the second rotating balls 126, the efficiency of improving the color reproduction rate by the first rotating balls 116 is rather Can be reduced. In addition, in another aspect, if the size of the first rotating balls 116 is equal to or larger than the size of the second rotating balls 126, collision between the adjacent first rotating balls 116. In this case, since the thickness of the first partition wall structure 114 must be extremely thin, the restrictions on the arrangement of the first rotating balls 116 and the manufacture of the first partition wall structure 114 may be increased. Accordingly, the size of the first rotating balls 116 is smaller than the size of the second rotating balls 126, the arrangement of the first rotating balls 116 and the first partition wall structure 114 It may be advantageous to the production efficiency. For example, the diameters of the first rotating balls 116 may be adjusted to about 1/4 to 1/2 compared to the diameters of the second rotating balls 126. When the diameter of the first rotating balls 116 is smaller than 1/4 compared to the diameter of the second rotating balls 126, the function as an auxiliary color representation means of the first rotating balls 116 is reduced Can be. On the contrary, when the diameters of the first rotating balls 116 are larger than 1/2 compared to the diameters of the second rotating balls 126, the arrangement space of the first rotating balls 116 is secured. It can be difficult.

The spacer 130 may maintain a gap between the lower structure 110 and the upper structure 120 at a predetermined interval. To this end, the height of the spacer 130 may be the same as the predetermined interval between the lower structure 110 and the upper structure 120. In addition, a plurality of spacers 130 are disposed between the lower structure 110 and the upper structure 120, so that the gap between the lower structure 110 and the upper structure 120 does not widen or narrow for each region. You can do that.

The insulating oil 144 may be a liquid for providing lubricity to the first and second rotating balls 116 and 126 for smooth rotation of the first and second rotating balls 116 and 126. have. To this end, the insulating oil 144 may fill a space between the lower structure 110 and the upper structure 120. That is, the insulating oil 144 may fill the inside of the first and second cavities 114a and 124a. In order to prevent the color reproducibility of the first and second rotating balls 116 and 126 from being lowered, the insulating oil 144 may be formed of a material having high light transmittance.

Subsequently, the operation of the electronic paper display device 100 as described above will be described in detail. 3 and 4 are views for explaining a process of operating the first rotating balls of the electronic paper display device according to an embodiment of the present invention. More specifically, FIG. 3 is a view for explaining a process of positioning the first rotating balls of the electronic paper display device according to an embodiment of the present invention at a first position expressing colors to the outside, and FIG. FIG. 4 is a diagram illustrating a process of placing first rotating balls of an electronic paper display device at a second position where color representation of the first rotating balls is restricted. Referring to FIG.

3 and 4, the first rotating balls 116 have a negative charge, the first hemisphere 126a of the second rotating balls 126 has a positive charge, and the second hemisphere 126b. Has a negative charge, the first and second plates 112 and 122 may receive a voltage as follows to operate the first and second rotating balls 116 and 126.

First, as shown in FIG. 3, when a positive voltage is applied to the first plate 112 and a negative voltage is applied to the second plate 122, the first hemisphere 126a is connected to the second plate. The second rotating balls 126 may be rotated to face the 122. Accordingly, the second rotating balls 126 may express the color of the first hemisphere 126a to the outside. In this case, when the first hemispheres 126a of the second rotating balls 126 have different colors, the second rotating balls 126 may express one combination color.

While the second rotating balls 126 express the color to the outside, the first rotating balls 116 are moved from the second position 20 to the first position 10 to express the color to the outside. Can be. That is, the first rotating balls 116 are configured to have a negative charge, so that the second position 20 may be caused by the attractive force of the first plate 112 and the repulsive force of the second plate 122. From to the first position 10. For the movement of the first rotating balls 116, the portion of the first plate 112 opposite to the first position 10 is higher than the portion of the first plate 112 opposite to the second position 20. A positive electrode can be applied. To this end, the first plate 112 is divided into a first portion facing the first position 10 and a second portion facing the second position 20, so that the first portion and the second portion are divided. It can be configured to apply a voltage independently to the part. Accordingly, the first rotating balls 116 may express colors to the outside through the second partition wall structure 124.

Next, as shown in FIG. 4, when a negative voltage is applied to the first plate 112 and a positive voltage is applied to the second plate 122, the second hemisphere 126b is connected to the second plate. The second rotating bones 126 may be rotated to face 122. Accordingly, the second rotating balls 126 may express the color of the second hemisphere 126b to the outside. In this case, when the second hemispheres 126b of the second rotating balls 126 have different colors from each other, the second rotating balls 126 may express one combination color.

While the second rotating balls 126 express the color to the outside, the first rotating balls 116 are moved from the first position 10 to the second position 20, so that the second It may be covered by the rotating balls 126. That is, due to the repulsive force by the first plate 112 and the attraction force by the second plate 122, the first rotating balls 116 are moved from the first position 10 to the second position 20. ) Can be moved. Accordingly, the first rotating balls 116 may be covered by the second rotating balls 126 so that the color representation to the outside may be blocked.

As described above, the first rotating balls 116 are applied with a predetermined voltage by the first and second plates 112 and 122, and thus the first position 10 and the second position 20. By moving between each other, the brightness and saturation of the color represented by the second rotating balls 126 may be selectively adjusted.

As described above, the electronic paper display device 100 according to the embodiment of the present invention is relatively colored through the color blind spot of the second rotating balls 126 disposed adjacent to the color display surface. The first rotating balls 116 disposed far away from each other express the color to the outside, thereby adjusting the brightness and the saturation of the color represented by the second rotating balls 126. In this case, the second rotating balls 126 are covered by the first position 10 and the second rotating balls 126 to express colors through the area between the second rotating balls 126 to express colors. It can be moved between the second position 20 which is not, to selectively adjust the brightness and saturation. Accordingly, the electronic paper display device according to the present invention allows the rotating balls arranged on the other planes to express the color of the rectangular area of the color representation of the rotating balls arranged on any one plane, so that the color reproducibility, contrast ratio, and It may have a structure with improved reflectance.

Subsequently, a method of manufacturing the electronic paper display device according to the embodiment of the present invention will be described in detail. Here, the overlapping contents of the electronic paper display device 100 according to the embodiment of the present invention described above will be omitted or simplified.

5 is a flowchart illustrating a manufacturing method of an electronic paper display device according to an exemplary embodiment of the present invention, and FIGS. 6A to 6D are views illustrating a manufacturing process of the electronic paper display device according to an exemplary embodiment of the present invention.

5 and 6A, the lower structure 110 having the first rotating balls 116 may be manufactured (S110). The manufacturing of the lower structure 100a may include preparing a first plate 112 and forming a first barrier rib structure 114 having first cavities 114a on the first plate 112. And positioning the first rotating balls 116 in the first cavities 114a.

Preparing the first plate 112 may include preparing a conductive plate. As an example, a metal plate may be used as the first plate 112. The first plate 112 as described above may be used as an electrode for rotating the first rotating balls 116.

The forming of the first barrier rib structure 114 may include forming a first insulating film on the first plate 112 and forming first recesses in the first insulating film. As the first insulating film, a photoreactive insulating film such as a dry film resist (DFR) may be used. When the first insulating film is a dry film resist, the forming of the partition wall may be performed by laminating the dry film resist on the entire surface of the first plate 112. The forming of the first recesses may be performed by performing a photolithography process for selectively removing a portion of the dry film resist. In the present exemplary embodiment, the first barrier rib structure 114 is formed by using a photolithography process, but the method of forming the first barrier rib structure 114 may be various. For example, the first barrier rib structure 114 may be formed using an imprint process or a predetermined etching process.

5 and 6b, the upper structure 120 having the second rotating balls 126 may be manufactured (S120). The manufacturing of the upper structure 120 may include preparing a second plate 122 and forming a second partition structure 124 having second cavities 124a on the second plate 122. And positioning the second rotating balls 126 in the second cavities 124a.

Preparing the second plate 116 may include preparing a plate having conductivity and light transmittance. As an example, a transparent electrode such as ITO may be used as the second plate 116.

The forming of the second partition wall structure 124 may include forming a second insulating film for forming a partition on the second plate 122 and positioning the second rotating balls 126 on the second insulating film. And forming second depressions for the purpose. As the second insulating layer, a photoreactive insulating film such as a dry film resist (DFR) may be used. When the first insulating film is a dry film resist, the forming of the second insulating film may be performed by laminating the dry film resist on the entire surface of the second plate 122. The forming of the second recesses may be performed by performing a photolithography process for selectively removing a portion of the dry film resist. In the present exemplary embodiment, the second barrier rib structure 124 is formed by using a photolithography process, but the method of forming the second barrier rib structure 124 may be various. For example, the second barrier rib structure 124 may be formed using an imprint process or a predetermined etching process.

5 and 6C, the lower structure 110 and the upper structure 120 may be coupled using the spacer 130 as a stopper (S130). For example, the spacer 130 may be formed on at least one of the lower structure 110 and the upper structure 120. The forming of the spacer 130 may be performed by forming an insulator in a region other than the pixel region of the electronic paper display device.

The upper structure 120 may be positioned on the upper portion of the lower structure 110. For example, the upper structure 120 may be disposed above the lower structure 110 so that the first and second barrier rib structures 114 and 124 face each other. To this end, a step of turning over the upper structure 120 may be added. Meanwhile, in the process of inverting the upper structure 120, the second rotating balls 126 may be separated from the second cavities 124a. To prevent this, in the process of positioning the second rotating balls 126 in the second cavities 124a, a step of forming an adhesive 142 in the second cavities 124a may be added. Can be. The adhesive 142 may be for preventing the second rotating balls 126 from falling when the upper structure 120 is inverted. In addition, the adhesive 142 may prevent the deterioration of the rotational efficiency of the second rotating balls 126 and may have a material having high light transmittance. To this end, the adhesive 142 may be an insulating oil for rotating lubricity of the first and second rotating balls (116, 126).

In addition, by using the spacer 130 as a stopper, the upper structure 120 may be in close contact with the lower structure 110. Accordingly, the lower structure 110 and the upper structure 120 may be in close contact with each other, while maintaining a predetermined interval by the spacer 130, can be coupled.

5 and 6D, the insulating oil 144 may be supplied between the lower structure 110 and the upper structure 120 (S140). For example, after a predetermined injection passage (not shown) is formed between the lower and upper structures 110 and 120, the first and second cavities 114a and 124a are filled through the injection passage. In order to supply the insulating oil 144, the insulating oil 144 may be supplied.

As described above, in the method of manufacturing the electronic paper display device according to the embodiment of the present invention, the lower structure 110 having the first rotating balls 116 is manufactured and the upper portion having the second rotating balls 126. After manufacturing the structure 120, by combining the lower structure 110 and the upper structure 120 so that the first rotating ball 116 is opposed to the area between the second rotating ball 126, The electronic paper display device 100 having a structure in which the first rotating balls 116 are disposed to express a color between the second rotating balls 126 may be manufactured. The electronic paper display device 100 manufactured as described above has a first position 10 that faces the area between the first rotating balls 116 and the second rotating balls 126 and expresses colors to the outside. The second positions 20 which are covered by the second rotating balls 126 to block color expression to the outside may be moved between each other. Accordingly, the manufacturing method of the electronic paper display device according to the present invention allows the rotating balls arranged on the other plane to selectively express the color of the rectangular region of the color representation of the rotating balls arranged on any one plane. An electronic paper display device having a structure having improved refresh rate, contrast ratio, and reflectance can be manufactured.

The foregoing detailed description is illustrative of the present invention. In addition, the foregoing description merely shows and describes preferred embodiments of the present invention, and the present invention can be used in various other combinations, modifications, and environments. That is, it is possible to make changes or modifications within the scope of the concept of the invention disclosed in this specification, the disclosure and the equivalents of the disclosure and / or the scope of the art or knowledge of the present invention. The above-described embodiments are for explaining the best state in carrying out the present invention, the use of other inventions such as the present invention in other states known in the art, and the specific fields of application and uses of the invention are required. Various changes are also possible. Accordingly, the foregoing description of the invention is not intended to limit the invention to the precise embodiments disclosed. It is also to be understood that the appended claims are intended to cover such other embodiments.

100: electronic paper display device
110: substructure
112: first plate
114: first partition wall structure
114a: first cavities
116: first rotating balls
120: superstructure
122: second plate
124: second bulkhead structure
124a: second cavities
126: second rotating balls
130: spacer
144: insulating oil

Claims (17)

Rotating balls arranged on the same plane to represent the color to the outside; And
It includes an auxiliary color representation to express the color to the outside through the space between the rotating balls,
And the auxiliary color representation is moved between a first position facing an area between the rotating balls and a second position facing the rotating balls. The method of claim 1,
And the auxiliary color expression body comprises rotating balls having a smaller size than the rotating balls. The method of claim 1,
Each of the rotating balls is made of hemispheres having a different color from each other,
The auxiliary color expression body includes a rotating ball having a single color electronic paper display device. The method of claim 1,
Further comprising a partition structure for partitioning the auxiliary color representations in the lateral direction,
The partition structure is made of a transparent material having light transmittance,
And the auxiliary color expression body expresses a color to the outside through the barrier rib structure. A lower structure having a first partition structure for partitioning the first rotating balls laterally; And
Including an upper structure having a second partition structure disposed on top of the lower structure, and has a second partition structure for laterally partitioning the second rotating balls having a larger size than the first rotating balls,
The first partition wall structure includes trench-shaped cavities extending from an area facing the second rotating balls to an area between the second rotating balls,
And the first rotating balls are moved between a first position facing the second rotating balls along the cavities and a second position facing the area between the second rotating balls. The method of claim 5, wherein
The lower structure includes a first plate coupled with the first partition wall structure,
The upper structure includes a second plate coupled to the second partition wall structure,
And the first plate and the second plate are used as electrodes for applying a voltage to the first and second rotating balls. The method according to claim 6,
The first plate and the second plate are selective to the first rotating balls and the second rotating balls such that the first rotating balls are moved between the first and second positions along the first cavities. Electronic paper display device for applying a voltage to the. The method of claim 7, wherein
The second rotating balls are arranged to form a zigzag form in a plane,
And the first rotating balls are arranged to coincide with the centers of the three rotating balls adjacent to the centers of the first rotating balls when the first rotating balls are positioned at the first position. The method of claim 5, wherein
Each of the first rotating balls is made of any one color,
Each of the second rotating balls is made of a first hemisphere and a second hemisphere having a different charge value compared to the first hemisphere,
The first hemisphere is any one of black, white, red, green, blue, cyan, magenta, and yellow,
The second hemisphere is the other of black, white, red, green, blue, cyan, magenta, and yellow electrons. Paper display. The method of claim 5, wherein
And a spacer disposed between the lower structure and the upper structure to maintain a distance between the lower structure and the upper structure at a predetermined interval. Manufacturing a lower structure having first rotating balls;
Manufacturing an upper structure having second rotating balls having a larger size than the first rotating balls; And
Forming a spacer on at least one of the lower structure and the upper structure, and using the spacer as a stopper, bringing the upper structure into close contact with the lower structure, thereby coupling the lower structure and the upper structure. But
The step of manufacturing the substructure is:
Preparing a first plate;
Forming a first insulating film on the first plate;
Forming trench-shaped first cavities extending from a region facing the second rotating balls to a region between the second rotating balls in the first insulating film; And
And positioning the first rotating balls in the first cavities. The method of claim 11,
The step of manufacturing the upper structure is:
Preparing a second plate;
Forming a second insulating film on the second plate; And
And removing second portions of the second insulating layer to form second cavities having a larger size than the first cavities. 13. The method of claim 12,
And the first plate and the second plate are used as electrodes for applying a voltage to the first and second rotating balls. delete The method of claim 11,
The manufacturing of the upper structure includes forming a second partition wall structure that partitions the second rotating balls laterally,
The forming of the spacers includes forming an insulator having a thickness thicker than that of the second partition structure in a region other than the pixel region of the electronic paper display device. The method of claim 11,
The step of manufacturing the upper structure is:
Preparing a second plate;
Forming a second partition structure on the second plate to partition the second rotating balls laterally;
Forming an adhesive in the second cavities; And
And attaching the second rotating balls to the second cavities using the adhesive. 17. The method of claim 16,
A method of manufacturing an electronic paper display device using insulating oil as the adhesive.

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