KR101306111B1 - Electrophoretic display device and method of fabricating the same - Google Patents

Abstract

An electrophoretic display device according to the present invention includes a first substrate and a second substrate facing each other, sub-pixels driven independently of each other, including electrophoretic particles interposed between the first substrate and the second substrate, and A partition wall disposed between the first substrate and the second substrate to divide the sub-pixels into pixel groups. Sub-pixels belonging to each of the pixel groups display the same color as each other, and the unit display pixel includes sub-pixels belonging to each of at least two pixel groups adjacent to each other among the pixel groups.

Description

Electrophoretic display device and method for manufacturing same {Electrophoretic display device and method of fabricating the same}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophoretic display, and more particularly, to an electrophoretic display and a method of manufacturing the same, which display color using sub-pixels displaying different colors.

Display device to replace the liquid crystal display device, a display device using a technology such as electrophoresis, electro-chromic, dichroic particles rotary method or dry powder transfer method Has been proposed. These techniques have been extensively studied as next generation display devices that can replace liquid crystal displays due to advantages such as wide viewing angle, low power consumption, and memory effects in proximity to conventional print media.

Among these display devices, an electrophoretic display device includes two electrodes, a dielectric fluid accommodated in a cavity closed from the periphery by a partition wall disposed between the two electrodes, and electrophoretic particles dispersed therein, Information is displayed by using the phenomenon in which the electrophoretic particles flow by an electric field applied between the two electrodes. In addition, in order to display a color image in the electrophoretic display device, a unit display pixel is implemented by combining a plurality of color pixels displaying light of different colors.

On the other hand, in order to improve the resolution of the electrophoretic display device, the size of each pixel should be reduced, but in this case, as the size of each pixel decreases, the volume of the cavity defined by the partition wall also decreases. It is not easy to fill the electrophoretic particles.

Accordingly, the present invention has been made in an effort to provide an electrophoretic display device having a structure in which the manufacturing of the electrophoretic display device is easy even when the size of a pixel of the electrophoretic display device is small, and a method of manufacturing the same.

In accordance with an aspect of the present invention, an electrophoretic display device includes a first substrate, a second substrate facing the first substrate, electrophoretic particles interposed between the first substrate and the second substrate. And sub-pixels driven independently of each other, and partition walls disposed between the first substrate and the second substrate to divide the sub-pixels into pixel groups.

Sub-pixels belonging to each of the pixel groups display the same color as each other, and the unit display pixel includes sub-pixels belonging to each of at least two pixel groups adjacent to each other among the pixel groups.

The manufacturing method of the electrophoretic display device according to the present invention for achieving the above technical problem is as follows. A partition wall is formed on the first substrate to form cavities, and electrophoretic particles are provided to the cavities to form sub pixels.

The cavities are formed in a unit of a pixel group so that the sub-pixels are divided into pixel groups, sub-pixels belonging to each of the pixel groups display the same color, and unit display pixels are at least adjacent to each other among the pixel groups. It is driven by sub-pixels belonging to each of the two pixel groups.

According to embodiments of the present invention, the electrophoretic particles may be collectively filled in the cavity in a unit of a pixel group including sub pixels displaying light of the same color. Therefore, even if the size of each sub-pixel becomes small, the electrophoretic particles may be easily filled in the cavity, thereby facilitating manufacture of the electrophoretic display device.

In addition, even if the electrophoretic display device has a pixel group including subpixels displaying the same color, the unit display pixel may be implemented with subpixels belonging to each of the pixel groups displaying different colors.

1 is a plan view of an electrophoretic display device according to an exemplary embodiment of the present invention.
FIG. 2 is a plan view of the first substrate illustrated in FIG. 1.
3 is a cross-sectional view illustrating a portion cut along line II ′ of FIG. 2.
4 is a cross-sectional view illustrating a portion cut along II-II ′ and III-III ′ of FIG. 2.
5A and 5B illustrate a method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In addition, in the following drawings, the thickness or size of each layer is exaggerated for convenience and clarity of description, the same reference numerals in the drawings refer to the same elements. As used herein, the term "and / or" includes any and all combinations of any of the listed items.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise "and / or" comprising "when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

1 is a plan view of an electrophoretic display device 500 according to an exemplary embodiment of the present invention. Meanwhile, some subpixels of the electrophoretic display device 500 are illustrated in FIG. 1, and the rest of the subpixels have the same structure as those of the subpixels of FIG.

Referring to FIG. 1, the electrophoretic display device 500 includes a first substrate 100, a second substrate 200, sub-pixels R, G, B, and W, and a partition 250.

The first substrate 100 has pixel regions in which the sub-pixels R, G, B, and W are disposed. In FIG. 1, a sign is not indicated for the pixel areas, but since the sub-pixels R, G, B, and W are disposed in one-to-one correspondence with the pixel areas, the positions of the pixel areas in FIG. The sub-pixels R, G, B, and W may be considered to be areas.

The second substrate 200 is disposed to face the first substrate 100. When the electrophoretic display device 500 operates in a reflective type, the electrophoretic display device 500 transmits the color using light reflected from the electrophoretic particles through the second substrate 200. As shown, the second substrate 200 may include a transparent material such as glass and a transparent resin.

The sub-pixels R, G, B, and W are disposed in one-to-one correspondence with the pixel areas to display colors used by the electrophoretic display device 500 to display an image. The sub-pixels R, G, B, and W are electrophoretic particles interposed between the first substrate 100 and the second substrate 200 (100K, 100W, 100R, 100G, and 100B of FIG. 3). ). More detailed configurations of the electrophoretic particles of the sub-pixels R, G, B, and W will be described in detail with reference to FIGS. 2 and 3.

The subpixels R, G, B, and W may correspond to the first pixel group GP1, the second pixel group GP2, the third pixel group GP3, and the fourth pixel according to the color displayed by the subpixels. It may be divided into a group GP4. The first pixel group GP1 includes red pixels R, each of which represents red color, and the second pixel group GP2 includes green pixels G, each of which represents green color. The third pixel group GP3 includes blue pixels B, each of which displays blue, and the fourth pixel group GP4 includes white pixels W, each of which displays white. The first to fourth pixel groups GP1, GP2, GP3, and GP4 are adjacent to each other and display different colors.

The sub-pixels R, G, B, and W have a matrix shape having a column direction parallel to the first direction D1 and a row direction parallel to a second direction D2 perpendicular to the first direction D1. Can be arranged. In this case, the first pixel group GP1 includes four red pixels R, the second pixel group GP2 includes four green pixels G, and the third pixel. The group GP3 includes four blue pixels G, and the fourth pixel group GP4 includes four white pixels W. FIG.

A position where subpixels belonging to the first to fourth pixel groups GP1, GP2, GP3, and GP4 are arranged will be described in detail as follows. Four red pixels R constituting the first pixel group GP1 are arranged in an Mth row (where N and M are natural numbers) in an Nth row of the matrix, an M + 1th column in an Nth row, The four green pixels G arranged in a one-to-one correspondence with the Mth column of the N + 1th row and the M + 1th column of the N + 1th row, and constitute the second pixel group GP2 are arranged in the matrix. Are arranged one-to-one corresponding to the M + 2th column of the Nth row of, the M + 3th column of the Nth row, the M + 2th column of the N + 1th row, and the M + 3th column of the N + 1th row, The four pixels B constituting the third pixel group GP3 are arranged in the M + th row of the N + 2th row, the M + 1th row of the N + 2th row, and the N + 3th row of the matrix. The four white pixels W arranged in a one-to-one correspondence to the Mth column of the N + 3th column and the M + 1th column of the N + 3th row, and constitute the fourth pixel group GP4 are N + 2th of the matrix. M + 2 columns of the row, M + 3 columns of the N + 2 rows, M + 2 columns of the N + 3 rows, and M + 3 columns of the N + 3 rows are arranged one-to-one.

For example, assuming that the natural number N and the natural number M are each 1, the four red pixels R constituting the first pixel group GP1 are based on the pixel matrix illustrated in FIG. 1. Four green pixels G arranged in one column, the second column of the first row, the first column of the second row, and the second column of the second row, and constituting the second pixel group GP2 are Arranged in a third column of the first row, a fourth column of the first row, a third column of the second row, and a fourth column of the second row. In addition, the four blue pixels B constituting the third pixel group GP3 may include a first column in a third row, a second column in a third row, a first column in a fourth row, and a fourth row. The four white pixels W arranged in the second column of and constituting the fourth pixel group GP4 are arranged in the third column of the third row, the fourth column of the third row, and the third column of the fourth row. , And in the fourth column of the fourth row.

Sub-pixels constituting each of the first to fourth pixel groups GP1, GP2, GP3, and GP4 are arranged adjacent to each other and directly connected to each other. That is, the partition wall 250 is not disposed between the sub-pixels constituting each of the first to fourth pixel groups GP1, GP2, GP3, and GP4. For example, referring to the first pixel group GP1, the partition wall 250 is not disposed between the four red pixels R so that the four red pixels R are directly connected to each other. Accordingly, since the four red pixels R may share a cavity accommodating the electrophoretic particles, the electrophoretic particles belonging to the four red pixels R may be collectively disposed in the shared cavity. I can fill it.

The unit display pixel DP includes sub-pixels belonging to each of the first to fourth pixel groups GP1, GP2, GP3, and GP4. Accordingly, the unit display pixel DP may be implemented by mixing colors displayed by sub-pixels belonging to each of the first to fourth pixel groups GP1, GP2, GP3, and GP4. In the display area of the electrophoretic display device 500, the unit display pixel DP is a unit area that displays colors by combining colors displayed from the sub-pixels R, G, B, and W. The unit The structure of the display pixel DP is as follows.

The unit display pixel DP is a sub-pixel arranged in the M + 1 column of the N + 1th row of the first pixel group GP1 and the Mth of the N + 1th row of the second pixel group GP2. Subpixels arranged in +2 columns, subpixels arranged in M + 1 columns of the N + 2th rows of the third pixel group GP3, and N + 2th rows of the fourth pixel group GP4. The colors displayed by the sub-pixels arranged in the M + 2th columns are mixed.

For example, assuming that each of the natural number N and the natural number M is 1 and the pixel matrix illustrated in FIG. 1 is described by way of example, the red pixels R arranged in the second column of the second row of the first pixel group GP1 are described. ), Green pixels G arranged in the third column of the second row of the second pixel group GP2, blue pixels B arranged in the second column of the third row of the third pixel group GP3, and One unit display pixel DP is implemented by combining the white pixels W arranged in the third column of the third row of the fourth pixel group GP4.

That is, the unit display pixel DP is located in an area defined by the first area A1 and the third area A3. Similarly, the area defined by the first area A1 and the fourth area A4, the area defined by the second area A2 and the third area A3, and the second area A2 and the fourth area Other unit display pixels may be located in each of the areas defined by the area A4.

According to the above-described configuration of the unit display pixel DP, the electrophoretic display device 500 includes a plurality of unit display pixels DP arranged in the first direction D1 and the second direction D2. In addition, the electrophoretic display apparatus 500 may display an image by adjusting colors displayed on the plurality of unit display pixels DP.

The partition wall 250 is disposed between the first substrate 100 and the second substrate 200 to divide the sub-pixels R, G, B, and W into pixel groups GP1, GP2, GP3, and GP4. ). The partition wall 250 includes a first extension part 251 and a second extension part 252, the first extension part 251 extends in a first direction D1, and the second extension part ( 252 extends in a second direction D2 perpendicular to the first direction D1. In addition, each of the first extension part 251 and the second extension part 252 is provided in plurality at regular intervals to cross each other.

The first extension part 251 is disposed between the first pixel group GP1 and the second pixel group GP2, and between the third pixel group GP3 and the fourth pixel group GP4. The second extension part 252 is disposed between the first pixel group GP1 and the third pixel group GP3 and between the second pixel group GP2 and the fourth pixel group GP4. Therefore, the first to fourth pixel groups GP1, GP2, GP3, and GP4 are spaced apart from each other by the partition wall 250.

FIG. 2 is a plan view of the first substrate 100 illustrated in FIG. 1, and FIG. 3 is a cross-sectional view illustrating a portion cut along line II ′ of FIG. 1.

2, a plurality of gate lines GL, a plurality of data lines DL, a plurality of switching elements TR, and first to sixth pixel electrodes on the first substrate 100. The plurality of pixel electrodes PE including the fields PE1, PE2, PE3, PE4, PE5, and PE6 are disposed.

Each of the plurality of gate lines GL extends in a second direction D2 to provide a gate signal for turning on the switching element TR toward the switching element TR. Each of the plurality of data lines DL extends in a first direction D1 to provide a data signal to the pixel electrode PE electrically connected to the switching element TR.

A location where the plurality of pixel electrodes PE are disposed on the first substrate 100 by crossing the plurality of gate lines GL and the plurality of data lines DL is defined. A position where the plurality of pixel electrodes PE are disposed corresponds to a position where the sub pixels R, G, B, and W of FIG. 1 are disposed in FIG. 1, and thus, the plurality of pixel electrodes PE is arranged in a matrix shape on the first substrate 100 like the sub pixels R, G, B, and W of FIG. 1.

In addition, as illustrated in FIG. 2, the plurality of pixel electrodes PE are electrically connected to the plurality of switching elements TR in a one-to-one correspondence, and each of the plurality of switching elements TR is connected to the plurality of pixel electrodes PE. One of the plurality of gate lines GL is electrically connected to one of the plurality of data lines DL.

Therefore, the turn-on operation of each of the switching elements TR may be controlled by using gate signals flowing through the plurality of gate lines GL, and accordingly, the turn-on of the switching elements TR may be controlled. In response to an on operation, the data signal provided to the plurality of pixel electrodes PE may be controlled. This means that the driving of the subpixels R, G, B, and W of FIG. 1 may be independently controlled using the plurality of pixel electrodes PE.

A more detailed structure of the plurality of switching elements TR and the pixel electrodes PE is illustrated by using two pixels arranged in the first column of the first row and the second column of the first row shown in FIG. 1 as an example. The explanation is as follows.

Referring to FIG. 3, for convenience, a red pixel R arranged in the first column of the first row illustrated in FIG. 1 is defined as a first red pixel R1, and the red pixel arranged in the second column of the first row. When R is defined as the second red pixel R2, a first pixel electrode PE1 is disposed on the first substrate 100 corresponding to the position of the first red pixel R1, and the second red pixel is disposed. The second pixel electrode PE2 is disposed on the first substrate 100 corresponding to the position of the pixel R2. In addition, two switching elements TR are electrically disposed on the first substrate 100 to be electrically connected to the first and second pixel electrodes PE1 and PE2 in a one-to-one correspondence.

In the embodiment shown in FIG. 3, each of the two switching elements TR may be implemented as a transistor. In this case, each of the two switching elements TR may include a gate electrode GE and a semiconductor pattern. (AP), a source electrode SE, and a drain electrode DE. The gate electrode GE is disposed on the first substrate 100, and the semiconductor pattern AP is disposed on a gate insulating layer covering the gate electrode GE. In addition, the source electrode SE and the drain electrode DE may be spaced apart from each other on the semiconductor pattern AP.

The pixel electrode PE is electrically connected to the drain electrode DE. In the embodiment shown in FIG. 3, the pixel electrode PE may include a transparent conductive material such as indium tin oxide and indium zinc oxide, and the embodiment shown in FIG. Unlike the example, the pixel electrode PE may include a material that reflects light, such as a metallic material.

A partition wall 250 is disposed between the first substrate 100 and the second substrate 200 to define a first cavity V1, and black and red electrophoretic particles (B1) are formed in the first cavity V1. 100K, 100R) is accommodated. In the embodiment shown in FIG. 3, the electrophoretic display device 500 may be implemented in a wet manner so that the first cavity V1 may be filled with an electrically insulating fluid 105, unlike the embodiment shown in FIG. 3. The electrophoretic display device 500 may be implemented in a dry manner so that the electrically insulating fluid 105 may be omitted.

Each of the black and red electrophoretic particles 100K and 100R may be a pigment itself having a black or red color, a pigment dispersed in a polymer resin system, or a resin particle colored to have black or red color by a combination thereof. . In addition, in the embodiment illustrated in FIG. 3, the black electrophoretic particles 100K and the red electrophoretic particles 100R may be charged to have different electrical characteristics. For example, when the black electrophoretic particles 100K are positively charged, the red electrophoretic particles 100R may be negatively charged. However, the present invention is not limited thereto, and the black and red electrophoretic particles 100K and 100R may be charged with the same polarity, but may have different electrophoresis.

The second substrate 200 is disposed to face the first substrate 100, and the common electrode 220 is disposed on the second substrate 200. The common electrode 220 may face the pixel electrodes PE and may include a transparent conductive material, such as the first and second pixel electrodes PE1 and PE2.

Meanwhile, a first electric field E1 is generated in the first cavity V1 by the first pixel electrode PE1 and the common electrode 210, and the second pixel electrode PE2 and the common electrode are generated. The second electric field E2 is generated in the first cavity V1 by the reference numeral 210. Directions of each of the first electric field E1 and the second electric field E2 are approximately perpendicular to the first and second substrates 100 and 200.

Therefore, when the directions of the first and second electric fields E1 and E2 are perpendicular to the first and second substrates 100 and 200, but opposite to each other, the first red pixel R1 is negative. And different types of electrophoretic particles in the second red pixel R2 may be floated in the first cavity V1.

For example, as shown in FIG. 3, when the directions of the first and second electric fields E1 and E2 are opposite to each other, the black electrophoretic particles 100K are formed in the first red pixel R1. The red electrophoretic particles 100R may float in the second cavity V2 in the first cavity V1, and the red electrophoretic particles 100R may float in the second red pixel R2. In this case, the first red pixel R1 displays black color by the black electrophoretic particles 100K floating by the first electric field E1, and the second red pixel R2 is formed of the first red pixel R2. Red is indicated by the red electrophoretic particles 100R floating by the two electric fields E2.

As described above, when the directions of the first and second electric fields E1 and E2 are opposite to each other, a potential difference occurs between the first pixel electrode PE1 and the second pixel electrode PE2. A horizontal electric field may be generated between the electrodes in a direction parallel to the first and second substrates 100 and 200. The horizontal electric field may prevent the black or red electrophoretic particles 100K and 100R from rising in the first cavity V1, but the first electric field E1 and the second electric field E2 may be prevented. In the case of controlling voltages applied to the common electrode 210 or the first and second pixel electrodes PE1 and PE2 such that their magnitudes are several times to several tens of times greater than the magnitude of the horizontal electric field, the horizontal It is possible to prevent the black and red electrophoretic particles 100K and 100R from moving by an electric field.

4 is a cross-sectional view illustrating a portion cut along II-II ′ and III-III ′ of FIG. 2. Meanwhile, in describing FIG. 4, components described above with reference to FIGS. 1 to 3 are denoted by reference numerals, and redundant descriptions of the components are omitted.

Referring to FIG. 4, the third to sixth pixel electrodes PE3, PE4, PE5, and one-to-one correspond to the positions of the red pixel R, the green pixel G, the blue pixel B, and the white pixel W. PE6) is disposed. In addition, when two sub-pixels displaying different colors are arranged adjacent to each other, a partition 250 is disposed between the two sub-pixels so that the two sub-pixels and corresponding cavities are spaced apart from each other. . For example, a partition wall 250 is disposed between the red pixel R and the green pixel G so that a first cavity V1 is defined corresponding to the red pixel R, and the green pixel G is defined. Correspondingly, a second cavity V2 spaced apart from the first cavity V1 is defined.

As described above with reference to FIG. 3, the first cavity V1 accommodates the electrically insulating fluid 105, the black electrophoretic particles 100K, and the red electrophoretic particles 100R, and the second cavity. An electrically insulating fluid 105, black electrophoretic particles 100K and green electrophoretic particles 100G are accommodated in V2, and an electrically insulating fluid 105 and black electrophoretic particles are contained in a third cavity V3. 100K and blue electrophoretic particles 100B are accommodated, and the fourth cavity V4 is housed in an electrically insulating fluid 105, black electrophoretic particles 100K and white electrophoretic particles 100R. do.

On the other hand, unlike the embodiment of the present invention shown in Figure 4, the red, green and blue electrophoretic particles (100R, 100G, 100B) are yellow pigment particles or polymer particles dyed yellow, magenta pigment particles Alternatively, it may be replaced with a polymer particle dyed in magenta and a pigment particle in cyan or a polymer particle dyed in cyan.

According to the above-described configuration, a red pixel R, a green pixel G, a blue pixel B, and a white pixel W may be implemented in the electrophoretic display device 500, and the subpixels are illustrated in FIG. 2. Unit display including the red, green, blue, and white pixels R, G, B, and W may be driven independently of each other according to the configuration of the first substrate (100 of FIG. 1) described with reference to FIG. The pixel DP may be implemented.

5A and 5B illustrate a method of manufacturing an electrophoretic display device according to an exemplary embodiment of the present invention.

Referring to FIG. 5A, as illustrated in FIG. 2, a plurality of gate lines (GL in FIG. 2), a plurality of data lines (DL in FIG. 2), and a plurality of pixel electrodes are formed on the first substrate 100. PE), and a plurality of switching elements (TR of FIG. 2). Forming the above-described components on the first substrate 100 to form an array substrate driven in an active matrix manner, may be similar to the method of forming the substrate of the array of a liquid crystal display and an organic electroluminescent display. As such, more specific description thereof will be omitted.

Thereafter, the partition 250 is formed on the first substrate 100 to form a plurality of cavities including first to fourth cavities V1, V2, V3, and V4. That is, the plurality of cavities are formed in a unit of a pixel group, and in the subsequent process, first and fourth pixel groups (GP1, GP2, GP3, and GP4) are filled with electrophoretic particles in the plurality of cavities. Sub-pixels (R, G, B, and W of FIG. 1) belonging to each may be formed.

Referring to FIG. 5B, the black electrophoretic particles 100K and the red electrophoretic particles 100R dispersed in the electrically insulating fluid 105 of FIG. 3 are disposed in the first cavity V1 using the dispenser 300. Fill it. As a result, a first pixel group GP1 capable of displaying red color is formed in the first cavity V1 to form four red pixels belonging to the first pixel group GP1 (R of FIG. 1). Can be.

After filling the black and red electrophoretic particles 100K and 100R in the first cavity V1, the black color is next to the cavity next to the cavity other than the first cavity V1, for example, the second cavity V2. And another pixel group capable of displaying red color by filling the red electrophoretic particles 100K and 100R.

Thereafter, similar to the method of filling black electrophoretic particles 100K and red electrophoretic particles 100R in the first cavity V1, black electrophoretic particles 100K in the second cavity V2. ) And the green electrophoretic particles 100G may be formed to form a second pixel group (GP2 of FIG. 1), and black electrophoretic particles 100K and blue electrophoretic particles (3) may be formed in the third cavity V3. 100B) may be formed to form a third pixel group (GP3 of FIG. 1), and the fourth pixel group may be filled with black electrophoretic particles 100K and white electrophoretic particles 100W in the fourth cavity V4. (GP4 in FIG. 1) can be formed. As a result, four green pixels belonging to the second pixel group (G of FIG. 1) are formed, four blue pixels belonging to the third pixel group (B of FIG. 1) are formed, and the fourth Four white pixels belonging to the pixel group (W in FIG. 1) may be formed.

Thereafter, the common electrode 210 is formed on the second substrate 200, and the second substrate 200 on which the common electrode 210 is formed is combined with the first substrate 100 to display an electrophoretic display device ( Production of 500 of FIG. 4 can be completed.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined in the appended claims. Will be apparent to those of ordinary skill in the art.

100: first substrate 200: second substrate
250: partition R, G, B, and W: sub pixels
GP1, GP2, GP3, GP4: first to fourth pixel groups
DP: module display pixel 500: electrophoretic display

Claims (19)

A first substrate;
A second substrate facing the first substrate;
Sub-pixels driven independently of each other, including electrophoretic particles interposed between the first substrate and the second substrate; And
A partition wall disposed between the first substrate and the second substrate to divide the sub pixels into pixel groups;
Sub-pixels belonging to each of the pixel groups display the same color as each other, and the unit display pixel includes sub-pixels belonging to each of at least two adjacent pixel groups among the pixel groups.
Each of the sub-pixels,
A pixel electrode disposed on the first substrate; And
And a switching element electrically connected to the pixel electrode to switch a data signal provided to the pixel electrode. delete The electrophoretic display of claim 1, wherein two of the pixel groups adjacent to each other display different colors. The method of claim 3, wherein the pixel groups,
A first pixel group each of the sub-pixels including sub-pixels displaying light of a first color;
A second pixel group, wherein each of the sub-pixels includes sub-pixels displaying light of a second color;
A third pixel group, wherein each of the sub-pixels includes sub-pixels displaying light of a third color; And
Each of the sub-pixels includes a fourth pixel group including sub-pixels displaying light of a fourth color,
The unit display pixel includes subpixels belonging to each of the first to fourth pixel groups. The electrophoretic display of claim 4, wherein the sub-pixels belonging to each of the first to fourth pixel groups are arranged adjacent to each other and directly connected to each other. The method of claim 5, wherein
A cavity for receiving the electrophoretic particles is located between the first substrate and the second substrate,
The subpixels belonging to each of the first to fourth pixel groups share the cavity. The electrophoretic display device of claim 5, wherein the partition wall is not disposed between the sub-pixels belonging to each of the first to fourth pixel groups. The electrophoretic display of claim 4, wherein the first to fourth pixel groups are spaced apart from each other by the barrier rib. The method of claim 4, wherein the sub-pixels belonging to the first to fourth pixel groups are arranged in a matrix having a column direction and a row direction.
The sub-pixels belonging to the first pixel group may include the M-th column (where N and M are natural numbers) in the Nth row of the matrix, the M + 1th column in the Nth row, the Mth column in the N + 1th row, And one-to-one correspondence with the M + 1th column of the Nth + 1th row,
The subpixels belonging to the second pixel group are M + 2th column of Nth row, M + 3th row of Nth row, M + 2th column of N + 1th row, and N + 1th of the matrix. Arranged one-to-one corresponding to the M + 3th column of the row,
Sub-pixels belonging to the third pixel group include M-th column of N + 2th row, M + 1th column of N + 2th row, Mth column of N + 3th row, and N + 3 One-to-one correspondence with the M + 1 column of the row,
Sub-pixels belonging to the fourth pixel group include M + 2 columns of N + 2 rows of the matrix, M + 3 columns of N + 2 rows, M + 2 columns of N + 3 rows, and An electrophoretic display device, wherein the electrophoretic display device is arranged in a one-to-one correspondence with an M + 3th column of an N + 3th row. The method of claim 9, wherein the unit display pixel,
A sub-pixel arranged in the M + 1 column of the N + 1th row of the first pixel group; a sub-pixel arranged in the M + 2 column of the N + 1th row of the second pixel group; of the third pixel group And subpixels arranged in the M + 1th column of the N + 2th row and subpixels arranged in the M + 2th column of the N + 2th row of the fourth pixel group. The method of claim 9, wherein the partition wall,
At least one first extension part extending in parallel with the column direction; And
And at least one second extension part extending in parallel with the row direction and intersecting the first extension part. The method of claim 11,
The first extension part is disposed between the first pixel group and the second pixel group and between the third pixel group and the fourth pixel group.
And the second extension part is disposed between the first pixel group and the third pixel group and between the second pixel group and the fourth pixel group. delete The electrophoretic display device according to claim 4, wherein the first color is red, the second color is green, the third color is blue, and the fourth color is white. delete delete delete delete delete

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